WO2017206283A1 - Combustion nozzle and ejection method thereof, generator head construction, pure oxygen composite heat carrier generator, and method for generating composite heat carrier - Google Patents

Abstract

A combustion nozzle, comprising: a nozzle body (1), one end thereof having a fuel inlet (11) and a pure oxygen inlet (12), and the other end thereof forming multiple diaphragm outer cavities (13). The interior of the nozzle body (1) is provided with a fuel passage (14) and a pure oxygen passage (15); one end of the fuel passage (14) is in communication with the fuel inlet (11), and the other end thereof is in communication with the multiple diaphragm outer cavities (13) by means of multiple inclined fuel holes (141); the inclined fuel holes (141) are radially and outwardly inclined along the ejection direction of fuel; one end of the pure oxygen passage (15) is in communication with the pure oxygen inlet (12), and the other end thereof is in communication with the multiple diaphragm outer cavities (13) by means of multiple inclined pure oxygen holes (151); the inclined pure oxygen holes (151) are radially and inwardly inclined along the ejection direction of pure oxygen. The combustion nozzle can uniformly atomize pure oxygen and natural gas, so that the uniformly atomized pure oxygen and natural gas are fully burned in a generator. Also disclosed are an ejection method of a combustion nozzle, a generator head construction, a pure oxygen composite heat carrier generator, and a method for generating a composite heat carrier.

Description

Burning nozzle and spraying method thereof, generator head structure, pure oxygen composite heat carrier generator and composite heat carrier generating method Technical field

The invention relates to a nozzle and a spraying method thereof, a generator head structure, a generator and a composite heat carrier generating method, in particular to a combustion nozzle in the field of high pressure combustion technology, a spraying method thereof, a generator head structure, Pure oxygen composite heat carrier generator and composite heat carrier generation method.

Background technique

Multi-component thermal fluid technology Thermal exploitation of heavy oil is a very efficient new technology. It has the advantages of high combustion efficiency, zero carbon injection and environmental protection and energy saving. The high temperature multi-component thermal fluid output by multiple thermal fluid technology has a comprehensive oil-increasing mechanism, which can greatly improve Single well capacity and enhanced oil recovery.

Multi-component thermal fluid technology is used in oil sands mining. Its core equipment is generator. At present, the multi-component hot fluid component output from the generator is required to remove nitrogen or reduce nitrogen content, mainly by using pure oxygen with oxygen content above 90%. The way natural gas is blended requires the need for high pressure full combustion.

The combustion nozzle of the generator is a core component for achieving high-temperature full combustion of pure oxygen and natural gas. In the prior art, the nozzle used in the generator is easily burned, and the effect of mixing pure oxygen and natural gas is not good, and it is easy to cause combustion. Unstable.

In addition, the above-mentioned generator has a high combustion temperature, a high pressure, and a high temperature oxidation property. The prior art generator head structure located under the generator is not resistant to high temperatures and is not resistant to oxidation.

Furthermore, the generator is also required to withstand higher combustion temperatures and pressures, and the generator is also required to withstand high temperatures and oxidation.

Therefore, it is necessary to provide a new nozzle, generator head structure, generator and composite heat carrier generation method to overcome the above drawbacks.

Summary of the invention

The object of the present invention is to provide a combustion nozzle capable of uniformly atomizing pure oxygen and natural gas, so that the homogeneous atomized pure oxygen and natural gas are fully burned in the generator, and the combustion nozzle has a reasonable structure, safety and reliability, and is used. long life.

Another object of the present invention is to provide an injection method capable of uniformly atomizing pure oxygen and natural gas to sufficiently burn homogeneous atomized pure oxygen and natural gas in a generator.

A further object of the invention is a generator head structure which is resistant to high temperatures and oxidation, and the nozzles therein are capable of pure oxygen and The natural gas is uniformly atomized, so that the homogeneous atomized pure oxygen and natural gas are fully burned in the generator, and the head structure of the generator is reasonable, safe and reliable, and has a long service life.

Another object of the present invention is to provide a pure oxygen composite heat carrier generator capable of uniformly atomizing pure oxygen and natural gas, realizing high-temperature full combustion of pure oxygen and natural gas, and finally forming a high-temperature composite heat carrier containing carbon dioxide and steam. The pure oxygen composite heat carrier generator has a reasonable structure, safety, reliability and long service life.

It is still another object of the present invention to provide a composite heat carrier generating method which can uniformly atomize pure oxygen and natural gas to achieve high temperature full combustion of pure oxygen and natural gas and finally form a high temperature composite heat carrier containing carbon dioxide and steam.

The technical solution of the present invention is achieved by the following measures:

The invention provides a combustion nozzle, the combustion nozzle comprising:

a nozzle body having a fuel inlet and a pure oxygen inlet at one end and a plurality of diaphragm outer chambers at the other end;

Wherein the nozzle body is provided with a fuel passage, one end of the fuel passage is in communication with the fuel inlet, and the other end of the fuel passage is connected to a plurality of the outer chambers of the diaphragm through a plurality of fuel oblique holes, the fuel oblique The hole is inclined radially outwardly along the injection direction of the fuel; the nozzle body is further provided with a pure oxygen passage, one end of the pure oxygen passage is connected with the pure oxygen inlet, and the other end of the pure oxygen passage is passed A plurality of pure oxygen inclined holes communicate with a plurality of the outer chambers of the diaphragm, and the pure oxygen inclined holes are disposed to be inclined radially inward along the jetting direction of the pure oxygen.

In a preferred embodiment, the pure oxygen passage is an annular passage, and the pure oxygen passage is disposed around the outer circumference of the fuel passage.

In a preferred embodiment, the ratio of the annular cavity width of the pure oxygen channel to the diameter of the pure oxygen oblique hole is 2.83.

In a preferred embodiment, the ratio of the diameter of the fuel passage to the diameter of the fuel oblique bore is 2.0.

In a preferred embodiment, a plurality of the outer diaphragm chambers are circumferentially disposed on an end surface of the nozzle body, and an outer contour shape of the diaphragm outer chamber is a fan shape, and a central angle of the fan shape is 60° to 90 degrees. °.

In a preferred embodiment, the outer cavity of the diaphragm is a spherical groove disposed at an end of the nozzle body, and the spherical groove has a spherical radius of 50 mm to 100 mm.

In a preferred embodiment, the acute angle formed between the outer edge tangent of the spherical groove and the end surface of the nozzle body is 5 to 15 degrees.

In a preferred embodiment, a plurality of the pure oxygen oblique holes are circumferentially disposed in the nozzle body, and an acute angle formed between an axis of the pure oxygen inclined hole and an axis of the nozzle body is 15 ° ~ 45 °.

In a preferred embodiment, a plurality of the fuel inclined holes are circumferentially disposed in the nozzle body, An obtuse angle formed between the axis of the fuel inclined hole and the axis of the nozzle body is 135 to 175.

In a preferred embodiment, the pure oxygen oblique hole has a diameter of 1.25 mm to 4.35 mm; and the fuel inclined hole has a diameter of 0.25 mm to 1.35 mm.

The present invention also provides an injection method of the above combustion nozzle, the injection method comprising the following steps:

a) injecting natural gas into the fuel passage of the nozzle body, and injecting pure oxygen into the pure oxygen passage of the nozzle body;

b) the natural gas is sprayed radially outward of the plurality of diaphragm outer chambers of the nozzle body through a plurality of fuel oblique holes, and the pure oxygen is sprayed radially inwardly through the plurality of pure oxygen oblique holes The outer cavity of the diaphragm.

In a preferred embodiment, in the step b), after the natural gas is ejected through the oblique hole of the fuel, a fuel separator layer is formed in the outer cavity of the diaphragm.

In a preferred embodiment, the fuel separator layer has a thickness of from 0.5 mm to 1.5 mm.

The present invention also provides a generator head structure, the generator head structure comprising the above-described combustion nozzle, the generator head structure further comprising:

a head body having an inner end surface opposite to a combustion chamber of the generator, the head body being provided with a nozzle passage and an ignition electrode passage; wherein the combustion nozzle is located in the nozzle passage, the combustion nozzle a plurality of diaphragm outer chambers disposed opposite to the combustion chamber;

An ignition electrode is located in the ignition electrode channel, and the ignition electrode is disposed opposite to the combustion chamber.

In a preferred embodiment, the inner surface of the head body is connected with a high temperature resistant heat insulation layer, and the combustion nozzle and the ignition electrode are both sealed in the high temperature heat insulation layer.

In a preferred embodiment, the material of the high temperature resistant heat insulation layer is tungsten, tantalum, niobium or tantalum.

In a preferred embodiment, the inner end surface of the head body is formed with a cooling cavity, and the high temperature resistant heat insulation layer is located above the cooling cavity, and the head body is provided with a water inlet passage, the A water passage is in communication with the cooling chamber.

The present invention also provides a pure oxygen composite heat carrier generator, the pure oxygen composite heat carrier generator comprising the above-described combustion nozzle, the pure oxygen composite heat carrier generator further comprising:

a generator body comprising a combustion chamber and a vapor chamber sleeved outside the combustion chamber, an upper end of the combustion chamber is in communication with the vapor chamber, and an upper end of the vapor chamber is connected with an outlet duct;

a generator head structure coupled to a lower end of the generator body, the generator head structure having a head body and the combustion nozzle and an ignition electrode disposed in the head body, the combustion nozzle And the ignition electrode is disposed opposite to the combustion chamber, and the head body is provided with a water inlet communicating with the vapor chamber Road.

In a preferred embodiment, the upper end of the vapor chamber is provided with a plurality of upper water inlet holes in a circumferential direction, and the plurality of upper water inlet holes are in communication with the vapor chamber.

In a preferred embodiment, the inner surface of the head body opposite to the combustion chamber is connected with a high temperature resistant heat insulation layer, and the combustion nozzle and the ignition electrode are both sealed on the high temperature resistant heat insulation layer. in.

In a preferred embodiment, an inner end surface of the head body is formed with a cooling cavity, the high temperature resistant heat insulation layer is located above the cooling cavity, and the water inlet passage passes through the cooling cavity and the steam chamber Connected.

The invention also provides a composite heat carrier generating method of the above pure oxygen composite heat carrier generator, the composite heat carrier generating method comprising the following steps:

a) injecting pure oxygen and natural gas into the combustion chamber of the generator body through the combustion nozzle, and injecting water into the steam chamber of the generator body through the water inlet passage of the generator head structure;

b) turning on the ignition electrode, the pure oxygen ejected from the combustion nozzle and the natural gas are fully blended and burned in the combustion chamber, and the water in the vapor chamber absorbs the heat of the combustion chamber and is vaporized into a vapor ;

c) the pure oxygen and the carbon dioxide formed by the full combustion of the natural gas, and the vapor in the vapor chamber, after being mixed at the upper end of the vapor chamber, form a composite heat carrier, the composite heat carrier being self-connected to the vapor The outlet pipe at the upper end of the chamber is discharged.

In a preferred embodiment, the upper end of the vapor chamber is provided with a plurality of upper water inlet holes in a circumferential direction, and the plurality of upper water inlet holes are in communication with the vapor chamber, in the step c), After the plurality of upper water inlets are sprayed into the steam chamber, the water is vaporized into a vapor, and then blended into the composite heat carrier and discharged from the outlet pipe.

In a preferred embodiment, the inner surface of the head body opposite to the combustion chamber is connected with a high temperature resistant heat insulation layer, and the combustion nozzle and the ignition electrode are both sealed on the high temperature resistant heat insulation layer. Inside.

In a preferred embodiment, the high temperature resistant heat insulating layer has a thickness of 20 mm to 30 mm.

The features and advantages of the present invention are:

1. The combustion nozzle of the present invention and the method for spraying the same, the pure oxygen inclined hole which is inclined inward in the radial direction, and the inclined hole of the fuel which is inclined radially outward, can ensure that the pure oxygen and natural gas ejected from the nozzle body are sufficient Blending atomization effectively ensures the collision of natural gas with pure oxygen after being sprayed; in addition, through the plurality of diaphragm outer chambers disposed at the end face of the nozzle body, the natural gas ejected from the fuel oblique hole can be in the outer chamber of the diaphragm A fuel diaphragm layer is formed inside, which can take away the heat of high-temperature combustion radiation of pure oxygen and natural gas, effectively insulates the direct contact between pure oxygen and the nozzle body at high temperature, and improves the service life of the combustion nozzle.

Second, the combustion nozzle of the present invention and the spraying method thereof, through the straight cavity width of the pure oxygen channel and the straight line of the pure oxygen oblique hole The ratio design of the diameter and the ratio of the diameter of the fuel passage to the diameter of the inclined hole of the fuel are designed so that the natural gas and pure oxygen ejected from the nozzle body can be blended according to a certain ratio and speed, and the generator is The combustion chamber is fully combusted to generate carbon dioxide, and the content of nitrogen in the combustion products is small, which meets the requirements of later production operations.

3. The combustion nozzle of the present invention and the spraying method thereof, by designing the outer cavity of the diaphragm as a spherical groove shape, the natural gas can be sprayed into the outer cavity of the diaphragm from the oblique hole of the fuel, and the natural gas is sprayed from the outer cavity of the spherical groove-shaped diaphragm. The end face of the nozzle body is adducted, and then all the natural gas collides with the pure oxygen ejected from the pure oxygen oblique hole to blend out the nozzle body and leave the end surface of the nozzle body, which is pure oxygen and natural gas in the combustion chamber of the generator. Full combustion provides protection.

4. The generator head structure of the present invention, by providing a high temperature resistant heat insulation layer on the inner end surface of the head body, the high temperature heat insulation layer is just blocked in the combustion of the generator when the head body is connected to the generator. The end of the chamber directly faces the combustion chamber, effectively protecting the head body, avoiding the head body directly facing the combustion chamber, preventing the high temperature ablation of the head body, and prolonging the service life of the head body; The combustion nozzle and the ignition electrode are both sealed in the high temperature resistant heat insulation layer, thereby effectively protecting the combustion nozzle and the ignition electrode, preventing high temperature ablation, and prolonging the service life of the combustion nozzle and the ignition electrode.

5. The generator head structure of the present invention can realize the cooling treatment of the head body through the design of the cooling cavity in the head body; at the same time, the high temperature heat insulation layer of the straight face combustion chamber can be cooled. Prevent high temperature ablation and natural gas and pure oxygen high temperature reaction damage to the head body.

The pure oxygen composite heat carrier generator and the composite heat carrier generating method of the invention can realize full combustion of pure oxygen and natural gas, and can generate a composite heat carrier containing carbon dioxide and steam, and the composite heat carrier can be injected into the oil layer to improve The single-well capacity and recovery factor of crude oil; the pure oxygen composite heat carrier generator realizes high-pressure closed combustion of pure oxygen and natural gas, and the structure of the combustion chamber in the generator body and the steam chamber set outside the combustion chamber is effectively ensured. The reliability and stability of combustion. The invention adopts high-pressure combustion of pure oxygen and natural gas, reduces the nitrogen content of the output composite heat carrier, and realizes the application of the multi-component thermal fluid technology in oil sand mining.

DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present invention. Other drawings may also be obtained from those of ordinary skill in the art in light of the inventive work.

1 is a cross-sectional structural view of a combustion nozzle of the present invention.

Fig. 2 is a perspective view showing a first embodiment of the combustion nozzle of the present invention.

Figure 3 is a perspective view of a second embodiment of the combustion nozzle of the present invention.

Figure 4 is a cross-sectional structural view showing the structure of the generator head of the present invention.

Figure 5 is a schematic view showing the structure of a pure oxygen composite heat carrier generator of the present invention.

Fig. 6 is an enlarged view of a portion A of Fig. 5;

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

Embodiment 1

As shown in FIGS. 1 to 3, the present invention provides a combustion nozzle including a nozzle body 1 having a fuel inlet 11 and a pure oxygen inlet 12 at one end and a plurality of diaphragm outer chambers 13 at the other end. Wherein, the nozzle body 1 is provided with a fuel passage 14 having one end communicating with the fuel inlet 11 and the other end passing through a plurality of fuel oblique holes 141 and a plurality of the diaphragm outer chambers 13 In connection, the fuel oblique hole 141 is disposed radially outwardly along the injection direction of the fuel; the nozzle body 1 is further provided with a pure oxygen passage 15, one end of the pure oxygen passage 15 and the pure oxygen inlet 12 In communication, the other end of the pure oxygen passage 15 communicates with the plurality of diaphragm outer chambers 13 through a plurality of pure oxygen inclined holes 151 which are inclined radially inward along the jet direction of pure oxygen. Settings.

Specifically, the nozzle body 1 has a substantially cylindrical shape, one end surface of which is provided with a fuel inlet 11 and a pure oxygen inlet 12, and the other end surface is provided with a plurality of diaphragm outer chambers 13. In the present embodiment, the diaphragm outer chamber 13 is a recess provided at the end of the nozzle body 1.

The fuel passage 14 is disposed at a central axis of the nozzle body 1, one end of which is in communication with the fuel inlet 11, and the other end of which is connected to a plurality of fuel oblique holes 141 which are respectively connected to the plurality of diaphragm outer chambers 13 In the present invention, the number of the fuel inclined holes 141 is the same as the number of the diaphragm outer chambers 13, and each of the diaphragm outer chambers 13 is in communication with one of the fuel inclined holes 141. The fuel inclined holes 141 are disposed at equal intervals in the circumferential direction in the nozzle body 1, and the fuel inclined holes 141 are disposed to be inclined radially outward in the injection direction of the fuel, that is, centered on the axis of the nozzle body 1, the fuel oblique The hole 141 injects fuel from the axis of the nozzle body 1 in a direction radially outward and toward the diaphragm outer chamber 13, so that the fuel is ejected from the end surface of the nozzle body 1 in a divergent manner. In the present embodiment, the fuel passage 14 is used to pass natural gas.

The pure oxygen passage 15 is disposed in the nozzle body 1. In the present embodiment, the pure oxygen passage 15 is an annular passage, and the pure oxygen passage 15 is disposed around the outer circumference of the fuel passage 14. In the present invention, one end of the nozzle body 1 may be provided with a plurality of pure The oxygen inlet 12 may be provided with a pure oxygen inlet passage 152 corresponding to each pure oxygen inlet 12 in the nozzle body 1, and one end of the pure oxygen passage 15 communicates with the plurality of pure oxygen inlets 12 through a plurality of pure oxygen inlet passages 152. The pure oxygen inlet passages 152 may be independent through holes provided in the nozzle body 1 at equal intervals in the circumferential direction; the other end of the pure oxygen passage 15 is connected with a plurality of pure oxygen oblique holes 151, and the pure oxygen oblique holes The 151 is respectively connected to the plurality of diaphragm outer chambers 13. In the present invention, the number of pure oxygen inclined holes 151 is the same as the number of the outer diaphragms 13 of the diaphragm, and each of the diaphragm outer chambers 13 is in communication with a pure oxygen inclined hole 151. The pure oxygen oblique holes 151 are disposed in the nozzle body 1 at equal intervals in the circumferential direction, and the pure oxygen inclined holes 151 are disposed to be inclined radially inward in the ejection direction of the pure oxygen, that is, centered on the axis of the nozzle body 1, The pure oxygen inclined hole 151 ejects pure oxygen from the diaphragm outer chamber 13 in the radial direction inward and toward the axial direction of the nozzle body 1, so that pure oxygen is ejected from the end surface of the nozzle body 1 in a contracted state. In the present embodiment, the pure oxygen channel 15 is used to pass a pure oxygen gas, which is a pure oxygen gas having an oxygen content of 90% or more.

The combustion nozzle of the invention can be applied to a pure oxygen composite heat carrier generator, which can uniformly atomize pure oxygen and natural gas, so that the homogeneous atomized pure oxygen and natural gas in the pure oxygen composite heat carrier generator In the high-pressure full combustion, the combustion nozzle realizes the application of multi-component thermal fluid technology in oil sand mining based on the reduction of operating cost.

The invention can ensure that the pure oxygen and the natural gas sprayed from the nozzle body 1 are fully blended and atomized by the pure oxygen inclined hole 151 which is inclined radially inwardly and the fuel inclined hole 141 which is inclined outwardly and radially. After the natural gas is ejected, the collision with the pure oxygen is blended; in addition, the natural gas ejected from the fuel oblique hole 141 is formed in the outer chamber 13 of the diaphragm through the plurality of diaphragm outer chambers 13 disposed at the end surface of the nozzle body 1. In the present invention, the thickness of the fuel separator layer is 0.5 mm to 1.5 mm, which can prevent the fired end surface of the nozzle body 1 from being directly exposed to fire. The fuel separator layer can burn high-temperature combustion of pure oxygen and natural gas. The heat is taken away, effectively insulating the direct contact between the pure oxygen and the nozzle body 1 at a high temperature, thereby reducing the temperature of the metal end surface of the nozzle body 1, and improving the service life of the combustion nozzle.

In an embodiment of the invention, the ratio of the annular cavity width D of the pure oxygen channel 15 to the diameter R1 of the pure oxygen oblique hole 151 is 2.83, that is, D/R1 = 2.83. The high-pressure pure oxygen introduced into the pure oxygen passage 15 is injected into the pure oxygen inclined hole 151 from the pure oxygen passage 15 at a compression ratio of 1:8, and finally the jet is formed to be ejected from the diaphragm outer chamber 13 of the nozzle body 1.

Further, the ratio of the diameter R2 of the fuel passage 14 to the diameter R3 of the fuel inclined hole 141 is 2.0, that is, R2/R3=2.0. The high-pressure natural gas introduced into the fuel passage 14 is injected into the fuel inclined hole 141 from the fuel passage 14 at a compression ratio of 1:4, and finally the jet is formed to be ejected from the diaphragm outer chamber 13 of the nozzle body 1.

The present invention is designed by ratio of the ring cavity width D of the pure oxygen channel 15 to the diameter R1 of the pure oxygen oblique hole 151. And the ratio of the diameter R2 of the fuel passage 14 to the diameter R3 of the fuel inclined hole 141, the natural gas and the pure oxygen sprayed from the nozzle body 1 can be blended in a certain ratio and speed, and then mixed in pure oxygen. The combustion chamber of the heat carrier generator is fully combusted to generate carbon dioxide, and the content of nitrogen in the combustion product is small, which meets the requirements of post production operations.

In an embodiment of the present invention, a plurality of the diaphragm outer chambers 13 are disposed on the end surface of the nozzle body 1 in the circumferential direction, and the outer contour shape of the diaphragm outer chamber 13 is a fan shape, and the central angle of the fan shape θ ₁ is 60° to 90°.

Specifically, the diaphragm outer cavity 13 is an arcuate groove provided on the fire end surface of the nozzle body 1. As shown in FIG. 2, four diaphragm outer cavities 13 are provided on the end surface of the nozzle body 1, and the four diaphragm outer cavities 13 is sequentially connected in the circumferential direction; as shown in FIG. 3, the end surface of the nozzle body 1 is provided with eight diaphragm outer chambers 13, and the eight diaphragm outer chambers 13 are sequentially connected in the circumferential direction. Of course, in other embodiments of the present invention, the fired end surface of the nozzle body 1 may be provided with five, six or other numbers of diaphragm outer chambers 13 according to actual production requirements, which is not limited herein.

The outer contour of the diaphragm outer chamber 13 has a fan shape as viewed from the fire end surface of the nozzle body 1, so that the natural gas flow injected into the outer chamber 13 of the diaphragm flows in a fan shape, and the central angle θ ₁ of the sector is 60°. ～90°, the size of the central angle θ ₁ may be determined according to the number of the diaphragm outer chambers 13 provided at the fire end face of the nozzle body 1.

Further, in the present invention, the diaphragm outer cavity 13 is a spherical groove provided at the end of the nozzle body 1, and the spherical groove has a spherical radius of 50 mm to 100 mm. An acute angle θ ₂ formed between the outer edge tangent F of the spherical groove and the fired end surface of the nozzle body 1 is 5° to 15°.

By designing the diaphragm outer cavity 13 into a spherical groove shape, natural gas can be injected into the diaphragm outer cavity 13 from the fuel oblique hole 141, and the natural gas will form a natural gas film along the concave surface of the ball, which is a fuel diaphragm. And the natural gas is adducted from the fired end surface of the nozzle body 1 from the spherical outer cavity 13 of the spherical groove shape, and then all the natural gas is blended with the pure oxygen sprayed from the pure oxygen oblique hole 151. The nozzle body 1 and away from the fire end face of the nozzle body 1 provide protection for the full combustion of pure oxygen and natural gas in the combustion chamber of the generator.

In one embodiment of the present invention, a plurality of pure oxygen oblique holes 151 are disposed at equal intervals in the circumferential direction in the nozzle body 1, and an acute angle θ ₃ formed between the axis of the pure oxygen inclined hole 151 and the axis of the nozzle body 1 is formed. It is 15° to 45°. Further, a plurality of fuel inclined holes 141 are circumferentially disposed in the nozzle body 1, and an obtuse angle θ ₄ formed between the axis of the fuel inclined hole 141 and the axis of the nozzle body 1 is 135° to 175°.

Specifically, the axis of the pure oxygen inclined hole 151 is substantially perpendicular to the axis of the fuel inclined hole 141, and an acute angle θ ₅ formed between the axis of the fuel inclined hole 141 and the fire end surface of the nozzle body 1 is 5. ° to 45°, preferably, the acute angle θ ₅ may be 30°.

The present invention sprays high-pressure natural gas through the plurality of fuel oblique holes 141 to the nozzle body 1 at an angle of 135° to 175°. A fan-shaped airflow surface of 60° to 90° is formed in the diaphragm outer cavity 13 of the nozzle body 1, thereby ensuring that the natural gas forms a fuel diaphragm layer on the fire end surface of the nozzle body 1, and then the pure oxygen flow from the pure oxygen oblique hole 151. Collision blending atomization, using the fan-shaped airflow to take away the heat of high-temperature combustion radiation of pure oxygen and natural gas, and insulate the direct contact between pure oxygen and the nozzle body 1 at high temperature, thereby improving the service life of the combustion nozzle.

In one embodiment of the present invention, the pure oxygen oblique hole 151 has a diameter R1 of 1.25 mm to 4.35 mm; and the fuel inclined hole 141 has a diameter R3 of 0.25 mm to 1.35 mm.

Embodiment 2

As shown in FIG. 1 to FIG. 3 , the present invention also provides a method for spraying a combustion nozzle, wherein the injection method adopts a combustion nozzle of Embodiment 1, the structure, working principle and beneficial effects of the combustion nozzle and Embodiment 1 The same, no longer repeat here. The spraying method includes the following steps:

a) injecting natural gas into the fuel passage 14 of the nozzle body 1 to inject pure oxygen into the pure oxygen passage 15 of the nozzle body 1;

b) the natural gas is sprayed radially outward of the plurality of diaphragm outer cavities 13 of the nozzle body 1 through a plurality of fuel oblique holes 141, and the pure oxygen is ejected radially inward through the plurality of pure oxygen oblique holes 151. A plurality of the diaphragm outer chambers 13 of the nozzle body 1 are described.

Specifically, in the step a), the pure oxygen injected into the pure oxygen passage 15 is a pure oxygen gas having an oxygen content of 90% or more.

In the step b), the high-pressure natural gas injected into the fuel passage 14 is ejected from the nozzle body 1 through the plurality of fuel oblique holes 141 at an angle of 135° to 175°, and is formed at 60° to 90° in the diaphragm outer chamber 13 of the nozzle body 1. At the same time, the high-pressure pure oxygen injected into the pure oxygen passage 15 is ejected from the plurality of pure oxygen inclined holes 151 at an angle of 15° to 45°.

Finally, the high-pressure natural gas ejected from the fuel inclined hole 141 and the pure oxygen flow ejected from the pure oxygen inclined hole 151 are collided and atomized at the fire end face of the nozzle body 1.

In the present invention, in the above step b), since the diaphragm outer chamber 13 is an arc-shaped groove provided on the fire-receiving end surface of the nozzle body 1, the natural gas is ejected out of the diaphragm outer chamber 13 through the fuel oblique hole 141, A fuel separator layer is formed in the outer chamber 13 of the diaphragm. In the embodiment, the thickness of the fuel separator layer is 0.5 mm to 1.5 mm, and the fuel diaphragm layer can block the fire end surface of the nozzle body 1 from being directly fired. The heat of the high-temperature combustion radiation of pure oxygen and natural gas can be taken away, effectively insulating the direct contact between the pure oxygen and the nozzle body 1 at a high temperature, thereby reducing the temperature of the metal end surface of the nozzle body 1 and improving the service life of the combustion nozzle.

In the spraying method of the present invention, the pure oxygen inclined hole 151 which is disposed obliquely inward in the radial direction of the combustion nozzle, and the fuel inclined hole 141 which is disposed radially outwardly and inclined, can ensure sufficient pure oxygen and natural gas ejected from the nozzle body 1 Blending atomization, It effectively guarantees the collision and mixing of pure oxygen after natural gas is sprayed, which provides guarantee for the full combustion of natural gas and pure oxygen.

Embodiment 3

As shown in FIG. 1 to FIG. 4, the present invention provides a generator head structure including a head body 2, a combustion nozzle 10 and an ignition electrode 3. The structure and working principle of the combustion nozzle 10 The beneficial effects are the same as those in the first embodiment, and are not described herein again.

Wherein: the head body 2 has an inner end surface 21 opposite to the combustion chamber 41 of the generator 4, the head body 2 is provided with a nozzle passage 22 and an ignition electrode passage 23; the combustion nozzle 10 is located in the nozzle passage 22; The combustion nozzle 10 has a nozzle body 1 having a fuel inlet 11 and a pure oxygen inlet 12 at one end, a plurality of diaphragm outer chambers 13 formed at the other end, and a plurality of the diaphragm outer chambers 13 and the The combustion chamber 41 of the generator 4 is oppositely disposed; wherein the nozzle body 1 is provided with a fuel passage 14 having one end communicating with the fuel inlet 11 and the other end passing through a plurality of fuel oblique holes 141 The plurality of the diaphragm outer chambers 13 are in communication with each other, and the fuel oblique holes 141 are disposed radially outwardly along the injection direction of the fuel; the nozzle body 1 is further provided with a pure oxygen passage 15 for the pure oxygen passages 15 One end of the pure oxygen passage 15 communicates with the pure oxygen inlet 12, and the other end of the pure oxygen passage 15 communicates with a plurality of the diaphragm outer chambers 13 through a plurality of pure oxygen inclined holes 151. The direction of injection of oxygen is inclined radially inward; the ignition electrode 3 is located Fire electrode channel 23, the ignition electrode 3 disposed opposite to the combustion chamber 41.

Specifically, the generator head structure is a component of the generator 4. In the present invention, the generator 4 may be a pure oxygen composite heat carrier generator, the generator head structure being located at the bottom of the generator 4. The outer periphery of the head body 2 of the generator head structure is connected to the generator body 42 of the generator 4 via a plurality of connecting members 24, the generator body 42 is provided with a combustion chamber 41 and sleeved outside the combustion chamber 41. The vapor chamber 43 has an inner end surface 21 of the head body 2 disposed opposite to the combustion chamber 41 and the vapor chamber 43.

In the present invention, the inner end surface 21 of the head body 2 is provided with a ring groove 25, and the ring groove 25 can be provided with a sealing ring 251. After the head body 2 is connected with the generator body 42, the sealing ring 251 can effectively ensure the sealing performance between the head body 2 and the generator body 42.

According to an embodiment of the present invention, the inner end surface 21 of the head body 2 is connected with a high temperature resistant heat insulation layer 26, and the combustion nozzle 10 and the ignition electrode 3 are both sealed in the high temperature heat insulation layer 26. In the present invention, the material of the high temperature resistant heat insulating layer 26 is tungsten, tantalum, niobium or tantalum. Considering the processing and practical cost, the high temperature resistant heat insulating layer 26 is preferably made of forged dense tungsten. In the present invention, the high temperature resistant heat insulating layer 26 has a thickness of 20 mm to 30 mm, and can withstand a high temperature of 3000 ° C or higher. The high temperature resistant heat insulating layer 26 can effectively protect the combustion nozzle 10 and the ignition electrode 3 from high temperature ablation. To extend the service life of the combustion nozzle 10 and the ignition electrode 3. The area of the high temperature resistant heat insulation layer 26 The size is exactly the same as the end surface area of the combustion chamber 41. After the head body 2 is connected to the generator body 42, the high temperature resistant heat insulating layer 26 is just blocked at the end of the combustion chamber 41 and directly faces the combustion chamber 41, blocking The direct contact of the head body 2 with the combustion chamber 41 effectively protects the head body 2 and prolongs the service life of the head body 2.

Further, the inner end surface 21 of the head body 2 is formed with a cooling cavity 27 which is a groove provided in the inner end surface 21 of the head body 2, and the high temperature resistant heat insulation layer 26 is located above the cooling cavity 27. In the present invention, the head body 2 is further provided with a water inlet passage 28 which communicates with the cooling chamber 27.

Specifically, a flow passage 271 is further disposed in the head body 2, and the flow passage 271 is in communication with the cooling chamber 27. When the head body 2 is sealingly connected to the lower end of the generator body 42, the overflow passage 271 An outlet pipe 272 may be connected to the outlet of the inner end surface 21 of the head body 2, and the outlet pipe 272 directly faces the vapor ring cavity 432 formed between the steam chamber 43 and the combustion chamber 41, so that the water inlet channel 28 flows in. The cooling water flows into the vapor ring chamber 432 through the cooling chamber 27 and the overflow passage 271.

The invention can realize the cooling treatment of the head body 2 through the design of the cooling chamber 27; at the same time, the high temperature heat insulating layer 26 of the straight surface combustion chamber 41 can be cooled to prevent high temperature ablation and high temperature of natural gas and pure oxygen. The situation in which the reaction damages the head body 2 occurs.

The generator head structure of the invention is particularly suitable for pure oxygen, natural gas direct atomization and homogeneous blending of pure oxygen composite heat carrier generator to realize high temperature and high pressure full combustion, and belongs to the technical field of high pressure combustion. The combustion nozzle 10 of the generator head structure can inject pure oxygen and natural gas into the combustion chamber 41 of the generator 4, and uniformly atomize pure oxygen and natural gas through the combustion nozzle 10, so that the homogeneous atomized pure oxygen and natural gas are The combustion chamber 41 can be fully burned at a high pressure; in addition, the cooling treatment of the head body 2 can be realized by the design of the cooling chamber 27 in the head body 2; at the same time, the high temperature insulation layer of the straight surface combustion chamber 41 can also be 26 is cooled to prevent high temperature ablation and high temperature reaction between natural gas and pure oxygen to damage the head body 2.

Embodiment 4

As shown in Figures 1 to 6, the present invention provides a pure oxygen composite heat carrier generator 4 comprising a generator body 42 and a generator head structure 20, wherein the generator body 42 includes a combustion chamber 41 and a sleeve In the vapor chamber 43 outside the combustion chamber 41, an upper end of the combustion chamber 41 is in communication with the vapor chamber 43, an upper end of the vapor chamber 43 is connected with an outlet duct 431; and a generator head structure 20 is connected thereto. At the lower end of the generator body 42, the generator head structure 20 has a head body 2 and a combustion nozzle 10 and an ignition electrode 3 disposed in the head body 2, the combustion nozzle 10 and the ignition electrode 3 is disposed opposite to the combustion chamber 41. The head body 2 is provided with a water inlet passage 28 communicating with the steam chamber 43. The structure, working principle and beneficial effects of the combustion nozzle 10 are Embodiment 1 is the same, and details are not described herein again.

Specifically, as shown in FIG. 5, the generator body 42 is substantially cylindrical, the middle portion is a combustion chamber 41, and the vapor chamber 43 is sleeved outside the combustion chamber 41, thereby forming a ring shape between the vapor chamber 43 and the combustion chamber 41. The vapor ring chamber 432; the upper end of the combustion chamber 41 is open and communicates with the vapor chamber 43, and the vapor chamber 43 located above the combustion chamber 41 forms a vapor gasification chamber 433. The vapor chamber 43 is divided into two parts, namely a vapor ring chamber 432 located below and a vapor gasification chamber 433 located above, and the vapor ring chamber 432 and the vapor gasification chamber 433 are connected to each other without a clear boundary between the two. . An outlet pipe 431 connected to the upper end of the vapor chamber 43 is in communication with the vapor gasification chamber 433.

In the present invention, as shown in Fig. 6, a plurality of upper water inlet holes 434 are provided in the circumferential direction at the upper end of the vapor chamber 43, and the plurality of upper water inlet holes 434 communicate with the vapor gasification chamber 433 of the vapor chamber 43. The water flow can be injected into the vapor gasification chamber 433 through the upper water inlet holes 434.

In the present embodiment, the upper water inlet holes 434 are disposed diametrically opposite to the upper end outer wall of the steam chamber 43, and the plurality of upper water inlet holes 434 are located on the same horizontal surface. This allows the water jetted from the plurality of upper water inlet holes 434 to concentrate on the center collision of the vapor gasification chamber 433, on the one hand for forming the water mist and cooling the generator body 42, and on the other hand, through the upward movement The water flow injected into the vapor gasification chamber 433 by the water hole 434 absorbs the heat of the generator body 42 to generate high temperature steam which is generated by the combustion of the fuel in the combustion chamber 41 together with the vapor in the vapor ring chamber 432. Blending to form a composite heat carrier.

Referring to FIG. 4, the generator head structure 20 has the same structure as the generator head of the third embodiment, and is located at the bottom of the pure oxygen composite heat carrier generator 4, the head of the generator head structure 20. The outer periphery of the body 2 is connected to the generator body 42 by a plurality of connecting members 24, and the inner end surface 21 of the head body 2 is disposed opposite to the combustion chamber 41 and the vapor chamber 43.

In the present invention, the inner end surface 21 of the head body 2 is provided with a ring groove 25, and the ring groove 25 may be provided with a sealing ring 251. After the head body 2 is connected with the generator body 42, the sealing ring 251 The sealing performance between the head body 2 and the generator body 42 can be effectively ensured.

The head body 2 is provided with a nozzle passage 22 and an ignition electrode passage 23, the combustion nozzle 10 is located in the nozzle passage 22, and the ignition electrode 3 is located in the ignition electrode passage 23.

Further, according to an embodiment of the present invention, the inner end surface 21 of the head body 2 is connected with a high temperature resistant heat insulation layer 26, and the combustion nozzle 10 and the ignition electrode 3 are both sealed in the high temperature heat insulation layer 26. . In the present invention, the material of the high temperature resistant heat insulating layer 26 is tungsten, tantalum, niobium or tantalum. Considering the processing and practical cost, the high temperature resistant heat insulating layer 26 is preferably made of forged dense tungsten. In the present invention, the high temperature resistant heat insulating layer 26 has a thickness of 20 mm to 30 mm, and can withstand a high temperature of 3000 ° C or higher. The high temperature resistant heat insulating layer 26 can effectively protect the combustion nozzle 10 and the ignition electrode 3 from high temperature ablation. To extend the service life of the combustion nozzle 10 and the ignition electrode 3. The high temperature insulation The area of the layer 26 is exactly the same as the area of the end face of the combustion chamber 41. After the head body 2 is connected to the generator body 42, the high temperature resistant heat insulating layer 26 is just blocked at the end of the combustion chamber 41 and directly faces the combustion. The chamber 41 blocks the direct contact between the head body 2 and the combustion chamber 41, effectively protecting the head body 2, preventing high temperature ablation, and prolonging the service life of the head body 2.

Further, the inner end surface 21 of the head body 2 is formed with a cooling cavity 27 which is a groove provided in the inner end surface 21 of the head body 2, and the high temperature resistant heat insulation layer 26 is located above the cooling cavity 27. The water inlet passage 28 in the head body 2 communicates with the cooling chamber 27.

Specifically, a flow passage 271 is further disposed in the head body 2, and the flow passage 271 is in communication with the cooling chamber 27. When the head body 2 is sealingly connected to the lower end of the generator body 42, the overflow passage 271 An outlet pipe 272 may be connected to the outlet of the inner end surface 21 of the head body 2, and the outlet pipe 272 directly faces the vapor ring cavity 432 formed between the steam chamber 43 and the combustion chamber 41, so that the water inlet channel 28 flows in. The cooling water flows into the vapor ring chamber 432 through the cooling chamber 27 and the overflow passage 271.

The invention can realize the cooling treatment of the head body 2 through the design of the cooling chamber 27; at the same time, the high temperature heat insulating layer 26 of the straight surface combustion chamber 41 can be cooled to prevent high temperature ablation and high temperature of natural gas and pure oxygen. The situation in which the reaction damages the head body 2 occurs.

The specific operation of the pure oxygen composite heat carrier generator is as follows: First, pure oxygen and natural gas are injected into the combustion chamber 41 of the generator body 42 through the combustion nozzle 10 disposed in the generator head structure 20, and pass through The water inlet passage 28 of the head structure 20 injects high-pressure water into the vapor ring chamber 432 of the vapor chamber 43 of the generator body 42; then, the ignition electrode 3 is opened, and pure oxygen and natural gas ejected from the combustion nozzle 10 are in the combustion chamber. Fully blended and burned in 41, the water injected into the vapor ring chamber 432 first cools the head body 2 and the high temperature resistant heat insulating layer 26, the combustion nozzle 10 and the ignition electrode 3 through the cooling chamber 27 of the head body 2, and then High-speed injection into the vapor ring chamber 432 of the vapor chamber 43, the water in the vapor ring chamber 432 can absorb the heat generated by the combustion in the combustion chamber 41, on the one hand, for cooling the combustion chamber 41, and on the other hand, the water in the vapor chamber 432. After the heat is absorbed, superheated steam is generated, and the superheated vapor flows into the vapor gasification chamber 433 at the top of the steam chamber 43 while the pure oxygen and natural gas are fully combusted in the combustion chamber 41 to generate carbon dioxide, which is also discharged into the top of the vapor chamber 43. In the gasification chamber 433; after that, the water is sprayed into the vapor gasification chamber 433 through the plurality of upper water inlet holes 434, and the water injected into the vapor gasification chamber 433 from the plurality of upper water inlet holes 434 absorbs the combustion. The heat above the chamber 41 is instantaneously vaporized into a vapor which is mixed with the carbon dioxide discharged from the combustion chamber 41 and the vapor discharged from the vapor chamber 432 to form a high-temperature composite heat carrier, which is self-connected to the vapor. The outlet duct 431 at the upper end of the chamber 43 is discharged.

The pure oxygen composite heat carrier generator of the invention is especially suitable for pure oxygen, natural gas direct atomization, homogeneous blending It is now fully burnt at high temperature and high pressure and belongs to the technical field of high pressure combustion. The combustion nozzle 10 of the composite heat carrier generator 4 can homogenize pure oxygen and natural gas to achieve high temperature and high pressure full combustion of the two, and the high speed flowing cooling water enters the cooling chamber 27 from the water inlet passage 28 of the head body 2. And then entering the vapor ring chamber 432 of the vapor chamber 43, which not only cools the head body 2, but also lifts the service life of the generator head structure 20, and also absorbs the heat of the combustion chamber 41 and vaporizes into a composite heat. The vapor required for the carrier. The present invention achieves high pressure closed combustion, while the structure of the combustion chamber 41 and the vapor chamber 43 sleeved outside the combustion chamber 41 ensures combustion reliability and stability.

Embodiment 5

As shown in FIG. 1 to FIG. 6 , the present invention further provides a composite heat carrier generating method for a pure oxygen composite heat carrier generator, wherein the composite heat carrier generating method is a composite of the pure oxygen composite heat carrier generator of the fourth embodiment. The heat carrier generation method, the structure, working principle and beneficial effects of the pure oxygen composite heat carrier generator are the same as those in the first embodiment, and are not described herein again. The composite heat carrier generation method comprises the following steps:

a) injecting pure oxygen and natural gas into the combustion chamber 41 of the generator body 42 through the combustion nozzle 10, and injecting water into the vapor chamber 43 of the generator body 42 through the water inlet passage 28 of the generator head structure 20;

b) turning on the ignition electrode 3, the pure oxygen and the natural gas ejected from the combustion nozzle 10 are sufficiently mixed and burned in the combustion chamber 41, and the water in the vapor chamber 43 absorbs the combustion chamber 41 The heat is then vaporized into a vapor;

c) the pure oxygen and the carbon dioxide formed by the full combustion of the natural gas, and the vapor in the vapor chamber 43 are mixed at the upper end of the vapor chamber 43 to form a composite heat carrier, the composite heat carrier being self-connected The outlet duct 431 at the upper end of the vapor chamber 43 is discharged.

Specifically, in the step a), the pure oxygen injected into the combustion nozzle 10 is a pure oxygen gas having an oxygen content of 90% or more.

In step b), after the ignition electrode 3 is turned on, the pure oxygen and natural gas ejected from the combustion nozzle 10 are sufficiently mixed and burned in the combustion chamber 41, and the water injected into the vapor ring chamber 432 first passes through the cooling chamber of the head body 2. 27 Cooling the head body 2 and the high temperature resistant heat insulating layer 26 therein, the combustion nozzle 10 and the ignition electrode 3, and then spraying the vapor ring chamber 432 of the vapor chamber 43 at a high speed, the water in the vapor ring chamber 432 can absorb the combustion chamber 41 The heat generated by the internal combustion is used to cool the combustion chamber 41 on the one hand. On the other hand, the water in the vapor ring chamber 432 absorbs heat to generate superheated steam, which will flow into the vaporization chamber 433 at the top of the vapor chamber 43. At the same time, pure oxygen and natural gas are fully combusted in the combustion chamber 41 to generate carbon dioxide, which is also discharged into the vapor gasification chamber 433 at the top of the vapor chamber 43.

In the step c), the carbon dioxide generated in the combustion chamber 41 and the vapor generated in the vapor ring chamber 432 of the vapor chamber 43 are mixed in the vapor gasification chamber 433 at the upper end of the vapor chamber 43.

Further, in the embodiment, a plurality of upper water inlet holes 434 are provided in the circumferential direction at the upper end of the steam chamber 43. The plurality of upper water inlet holes 434 communicate with the steam chamber 43. In step c), the water injected into the vapor chamber 43 from the plurality of upper water inlet holes 434 is vaporized into steam, and the carbon dioxide generated in the combustion chamber 41 is generated. And the vapors generated in the vapor ring chamber 432 are mixed with each other and then discharged from the outlet pipe 431.

Specifically, water is sprayed into the vapor gasification chamber 433 through the plurality of upper water inlet holes 434, and the water injected into the vapor gasification chamber 433 from the plurality of upper water inlet holes 434 absorbs heat instantaneously above the combustion chamber 41. The vaporization is vaporized, and the vapor is mixed with the carbon dioxide discharged from the combustion chamber 41 and the vapor discharged from the vapor ring chamber 432 to form a high-temperature composite heat carrier which is self-connected to the outlet pipe at the upper end of the vapor chamber 43. 431 discharge.

The composite heat carrier is produced by injecting cooling water into the vapor ring chamber 432 through a water inlet passage 28 located below the generator body 42. The upper water inlet hole 434 collides the liquid water into the vapor gasification chamber 433. The pure oxygen and natural gas are combusted in the combustion chamber 41. During the combustion process, the water in the vapor ring chamber 432 is heated to a vapor, and the combustion flue gas is mixed with the water in the vapor gasification chamber 433 and the upper inlet hole 434. In the present invention, the temperature of the output composite heat carrier can be controlled by the amount of water flowing through the upper inlet hole 434, and the vapor formed by the vaporization of the combustion chamber 41 after being injected into the vaporization chamber 433 through the upper inlet hole 434 is generated. The carbon dioxide, and the liquid water in the vapor ring chamber 432 are mixed with each other due to the heat absorption, and are output to the generator body 42 through the outlet pipe 431.

In an embodiment of the present invention, the inner end surface 21 of the head body 2 is connected to the high temperature resistant heat insulating layer 26, and the combustion nozzle 10 and the ignition electrode 3 are both sealed in the high temperature heat insulating layer 26. In the present invention, the material of the high temperature resistant heat insulating layer 26 is tungsten, tantalum, niobium or tantalum. Considering the processing and practical cost, the high temperature resistant heat insulating layer 26 is preferably made of forged dense tungsten. In the present invention, the high temperature resistant heat insulating layer 26 has a thickness of 20 mm to 30 mm, and can withstand a high temperature of 3000 ° C or higher. The high temperature resistant heat insulating layer 26 can effectively protect the combustion nozzle 10 and the ignition electrode 3 from high temperature ablation. To extend the service life of the combustion nozzle 10 and the ignition electrode 3. The area of the high temperature resistant heat insulating layer 26 is exactly the same as the end surface area of the combustion chamber 41. After the head body 2 is connected to the generator body 42, the high temperature resistant heat insulating layer 26 is just blocked at the end of the combustion chamber 41. And directly facing the combustion chamber 41, the direct contact between the head body 2 and the combustion chamber 41 is blocked, the head body 2 is effectively protected, and the service life of the head body 2 is extended.

The composite heat carrier generating method of the invention can realize full combustion of pure oxygen and natural gas, and can generate a composite heat carrier containing carbon dioxide and steam, and the composite heat carrier injected into the oil layer can improve the single well productivity and oil recovery of the crude oil. The invention adopts high-pressure combustion of pure oxygen and natural gas, reduces the nitrogen content of the output composite heat carrier, and realizes the application of the multi-component thermal fluid technology in oil sand mining.

The above is only a few embodiments of the present invention, and various changes and modifications may be made to the embodiments of the present invention without departing from the spirit and scope of the invention.

Claims (25)

A combustion nozzle, characterized in that the combustion nozzle comprises: a nozzle body having a fuel inlet and a pure oxygen inlet at one end and a plurality of diaphragm outer chambers at the other end; Wherein the nozzle body is provided with a fuel passage, one end of the fuel passage is in communication with the fuel inlet, and the other end of the fuel passage is connected to a plurality of the outer chambers of the diaphragm through a plurality of fuel oblique holes, the fuel oblique The hole is inclined radially outwardly along the injection direction of the fuel; the nozzle body is further provided with a pure oxygen passage, one end of the pure oxygen passage is connected with the pure oxygen inlet, and the other end of the pure oxygen passage is passed A plurality of pure oxygen inclined holes communicate with a plurality of the outer chambers of the diaphragm, and the pure oxygen inclined holes are disposed to be inclined radially inward along the jetting direction of the pure oxygen. A combustion nozzle according to claim 1, wherein said pure oxygen passage is an annular passage, and said pure oxygen passage is disposed around an outer circumference of said fuel passage. A combustion nozzle according to claim 2, wherein a ratio of a ring cavity width of said pure oxygen passage to a diameter of said pure oxygen inclined hole is 2.83. A combustion nozzle according to claim 2, wherein a ratio of a diameter of said fuel passage to a diameter of said fuel inclined bore is 2.0. A combustion nozzle according to claim 1, wherein a plurality of said diaphragm outer chambers are circumferentially disposed at an end surface of said nozzle body, and said diaphragm outer chamber has an outer contour shape of a sector shape, said sector-shaped The central angle is 60° to 90°. The combustion nozzle according to claim 1 or 5, wherein the diaphragm outer cavity is a spherical groove provided at an end of the nozzle body, and the spherical groove has a spherical radius of 50 mm to 100 mm. A combustion nozzle according to claim 6, wherein an acute angle formed between an outer edge tangent of said spherical groove and an end surface of said nozzle body is 5 to 15 . A combustion nozzle according to claim 2, wherein a plurality of said pure oxygen oblique holes are circumferentially spaced apart in said nozzle body, said axis of said pure oxygen inclined hole and said axis of said nozzle body The acute angle formed between the two is 15° to 45°. A combustion nozzle according to claim 2, wherein a plurality of said fuel inclined holes are circumferentially spaced apart from each other in said nozzle body, between an axis of said fuel inclined hole and an axis of said nozzle body The obtuse angle formed is 135° to 175°. The combustion nozzle according to claim 1, wherein said pure oxygen oblique hole has a diameter of 1.25 mm to 4.35 mm; and said fuel inclined hole has a diameter of 0.25 mm to 1.35 mm. A method of spraying a combustion nozzle according to any one of claims 1 to 10, characterized in that The spraying method includes the following steps: a) injecting natural gas into the fuel passage of the nozzle body, and injecting pure oxygen into the pure oxygen passage of the nozzle body; b) the natural gas is sprayed radially outward of the plurality of diaphragm outer chambers of the nozzle body through a plurality of fuel oblique holes, and the pure oxygen is sprayed radially inwardly through the plurality of pure oxygen oblique holes The outer cavity of the diaphragm. The spraying method according to claim 11, wherein in said step b), after said natural gas is ejected through said oblique hole of said fuel, a fuel separator layer is formed in said outer cavity of said diaphragm. The spraying method according to claim 12, wherein the fuel separator layer has a thickness of 0.5 mm to 1.5 mm. A generator head structure, characterized in that the generator head structure comprises the combustion nozzle according to any one of claims 1 to 10, the generator head structure further comprising: a head body having an inner end surface opposite to a combustion chamber of the generator, the head body being provided with a nozzle passage and an ignition electrode passage; wherein the combustion nozzle is located in the nozzle passage, the combustion nozzle a plurality of diaphragm outer chambers disposed opposite to the combustion chamber; An ignition electrode is located in the ignition electrode channel, and the ignition electrode is disposed opposite to the combustion chamber. The generator head structure according to claim 14, wherein a heat-resistant heat-insulating layer is connected to an inner end surface of the head body, and the combustion nozzle and the ignition electrode are both sealed and sealed. In the high temperature insulation layer. The generator head structure according to claim 15, wherein the material of the high temperature resistant heat insulating layer is tungsten, tantalum, niobium or tantalum. The generator head structure according to claim 14 or 15, wherein an inner end surface of the head body is formed with a cooling chamber, and the high temperature resistant heat insulating layer is located above the cooling chamber, the head The body body is provided with a water inlet passage, and the water inlet passage is in communication with the cooling chamber. A pure oxygen composite heat carrier generator, characterized in that the pure oxygen composite heat carrier generator comprises the combustion nozzle according to any one of claims 1 to 10, and the pure oxygen composite heat carrier generator further include: a generator body comprising a combustion chamber and a vapor chamber sleeved outside the combustion chamber, an upper end of the combustion chamber is in communication with the vapor chamber, and an upper end of the vapor chamber is connected with an outlet duct; a generator head structure coupled to a lower end of the generator body, the generator head structure having a head body and the combustion nozzle and an ignition electrode disposed in the head body, the combustion nozzle And the ignition electrode is disposed opposite to the combustion chamber, and the head body is provided with a water inlet passage communicating with the vapor chamber. A pure oxygen composite heat carrier generator according to claim 18, wherein an upper end of said vapor chamber is provided with a plurality of upper water inlet holes in a circumferential direction, and said plurality of upper water inlet holes and said vapor chamber Connected. A pure oxygen composite heat carrier generator according to claim 18, wherein said head body is connected to said inner end surface of said combustion chamber with a high temperature resistant heat insulating layer, said combustion nozzle and said ignition The electrodes are all sealed in the high temperature resistant heat insulation layer. The pure oxygen composite heat carrier generator according to claim 20, wherein an inner end surface of the head body is formed with a cooling chamber, and the high temperature resistant heat insulating layer is located above the cooling chamber, the A water passage is in communication with the vapor chamber through the cooling chamber. A composite heat carrier generating method for a pure oxygen composite heat carrier generator according to any one of claims 18 to 21, wherein the composite heat carrier generating method comprises the following steps: a) injecting pure oxygen and natural gas into the combustion chamber of the generator body through the combustion nozzle, and injecting water into the steam chamber of the generator body through the water inlet passage of the generator head structure; b) turning on the ignition electrode, the pure oxygen ejected from the combustion nozzle and the natural gas are fully blended and burned in the combustion chamber, and the water in the vapor chamber absorbs the heat of the combustion chamber and is vaporized into a vapor ; c) the pure oxygen and the carbon dioxide formed by the full combustion of the natural gas, and the vapor in the vapor chamber, after being mixed at the upper end of the vapor chamber, form a composite heat carrier, the composite heat carrier being self-connected to the vapor The outlet pipe at the upper end of the chamber is discharged. The composite heat carrier generating method according to claim 22, wherein the upper end of the vapor chamber is provided with a plurality of upper water inlet holes in a circumferential direction, and the plurality of upper water inlet holes are connected to the vapor chamber In the step c), water sprayed into the vapor chamber from a plurality of the upper inlet holes is vaporized into a vapor, and then blended into the composite heat carrier and discharged from the outlet pipe. The composite heat carrier generating method according to claim 22, wherein a heat-resistant heat-insulating layer is connected to an inner end surface of the head body opposite to the combustion chamber, and the combustion nozzle and the ignition electrode are both The seal is disposed in the high temperature resistant heat insulation layer. The composite heat carrier production method according to claim 24, wherein the high temperature heat resistant layer has a thickness of 20 mm to 30 mm.

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