CN111692522A - Disc-shaped polishing-shaped diversion structure in gasification equipment - Google Patents

Abstract

The invention belongs to the technical field of gasification equipment, and relates to a disc throw-shaped hole-shaped diversion structure inside a gasification device. The corners are turned upward and outward to form an arc-shaped flanging. The throwing disc is provided with a plurality of hexagonal contact holes. When working, the bottom of the throwing disc is tangent to the liquid surface. Compared with the prior art, the present invention increases the gasification contact area in the working state through the hexagonal contact holes on the surface of the disc, makes it fully gasified, and has the effect of accelerating heat and mass transfer; this structure can also be used In other diversion equipment and gasification equipment, it is widely used and has a high utilization rate.

Description

Disk-shaped hole-shaped diversion structure inside the gasification equipment

technical field

The invention belongs to the technical field of gasification equipment, and relates to a diversion structure of a peak-shaving type gasification device, in particular to a disc throw-shaped hole-shaped diversion structure inside the gasification device.

Background technique

With the continuous advancement of liquefied natural gas in my country, more and more people use liquefied natural gas in my country, and the natural gas fist projects in China and Russia are also ventilated, so the heating of natural gas is extremely important. The gasification device is mainly used to heat natural gas. With different seasons, the peak value of gas consumption is also different, so the control of gasification is a relatively prominent problem. The diversion structure of common gasification equipment does not achieve the best possible gas-liquid reaction.

The diversion structure without contact holes already exists, but this does not mean that it is the optimal choice. Now there is a fully enclosed diversion structure, which results in incomplete gas-liquid reaction, high energy consumption, and unstable gasification. factors that lead to the uncontrollability and unpredictability of gasification heat and mass transfer.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a disc throw-shaped hole-shaped diversion structure inside the gasification equipment with large gas-liquid contact area, sufficient gas-liquid reaction, and low energy consumption.

The object of the present invention can be realized through the following technical solutions:

The invention provides a circular disc throw-shaped hole-shaped diversion structure inside a gasification device, including a throw-shaped disc, the center of the throw-shaped disc is provided with a raised sharp corner, and the edge is turned upward and eversion to form an arc-shaped turn A plurality of hexagonal contact holes are arranged in the throwing disc; when working, the bottom of the throwing disc is tangent to the liquid surface.

When working, high-temperature flue gas is ejected from the nozzle structure above the gasification equipment, and the flue gas impacts downwards and hits the disc throw-shaped hole-shaped diversion structure, which guides the high-temperature flue gas. Due to the hexagonal contact holes, the liquid permeation holes under the structure have good heat exchange and gasification with the flue gas, which greatly increases the heat exchange area, and the high temperature flue gas can fully communicate with the liquid. After contact, the high-temperature flue gas exchanges heat with the liquid, and then vaporizes the liquid that exchanges heat with it. Because the structure also has the function of guiding flow, the liquid after gasification and the gas coming out of the nozzle together form an upward swirl flow under the guiding action of the toss-shaped structure, which has the effect of gasification heat exchange.

The inner disc throw-shaped hole-shaped diversion structure of the novel gasification equipment of the present invention has the characteristics of increasing the contact area, fully reacting gas and liquid, and reducing energy consumption due to the distribution of hexagonal contact holes on the surface thereof. Enhance heat and mass transfer and improve gasification efficiency. In addition, the new type of hole-shaped diversion structure can be provided with different apertures and different shapes of ventilation holes on its surface. The size, quantity and shape of the ventilation holes can sense the speed of the degree of gasification. According to the demand for natural gas to be heated, it can be artificially carried out. The degree of gasification, regulating the rate of heating natural gas, saving energy and improving efficiency.

As a preferred technical solution, the plurality of hexagonal contact holes are distributed on a plurality of circles centered on the center of the circular disc to form a multi-circle contact hole group.

As a preferred technical solution, the hexagonal contact holes of each contact hole group are evenly distributed along the circumference.

As a preferred technical solution, the size of the hexagonal contact holes of the outer ring contact hole group is larger than the size of the hexagonal contact holes of the inner ring contact hole group.

As a preferred technical solution, a plurality of hexagonal contact holes form two contact hole groups, and the side lengths of the hexagonal contact holes in the two contact hole groups are different in ratio according to the different spray speeds at the nozzle. The optimal choice is 1.1-1.25:1, because the speed of the flue gas ejected from the nozzle is as high as 33m/s, and it is a high temperature, and it is considered to be an incompressible fluid with turbulent flow. flow effect.

As a preferred technical solution, the distance between the center of the hexagonal contact hole (14) of the outer ring contact hole group and the center of the throwing disc (11) is the distance between the center of the hexagonal contact hole (14) of the inner ring contact hole group and the throwing disc (11). 1.5 to 1.7 times the distance between the centers of the shaped discs (11). It is further preferred that the value is 1.6. This can not only ensure the diversion effect of the disc structure, but also ensure the best gasification effect.

As a preferred technical solution, the hexagonal contact hole is a regular hexagonal contact hole, and one side of the hexagonal contact hole faces the center of the circular disc.

As a preferred technical solution, a plane portion is formed between the sharp corner and the arc-shaped flange of the throwing disc, and the hexagonal contact holes are distributed on the plane portion.

As a preferred technical solution, the porosity of the plane portion of the throwing disc is 35-45%. It is further preferred that when a plurality of hexagonal contact holes form two-ring contact hole groups, it is advisable to have about 8-9 openings in the inner ring, and 11-12 openings in the outer ring. There is no opening in the place of flanging, and the whole opening range accounts for 39% of the total plane part. In the calculation of the present invention, the velocity of high-temperature flue gas ejected from the nozzle can reach 33m/s, and the temperature is about 1200K. The ejected flue gas is considered to be an incompressible fluid with turbulent flow. The water is gasified, so the throwing disc structure is very important, and the porosity of the gasification structure is about 40%, which is beneficial to the sprayed flue gas and the water at the bottom of the disc. Better and more complete contact, and the original unopened one must not have such a high vaporization rate. If the opening rate of the disk continues to increase, the entire disk structure will be very fragile and cannot withstand such a large speed and high temperature. The flue gas, and the diversion effect is weakened, but the heat exchange efficiency is reduced.

As a preferred technical solution, the shape of the sharp corner is that the top is an acute angle, and the angle increases downward in turn, and is pointed; the angle of the acute angle at the top of the sharp angle is 30-35°. When the number of sharp angles is too small, it is not easy to play a good guiding effect on the sprayed flue gas, so when the high-speed sprayed flue gas contacts the disc, it will cause the disc to splash and cannot be well vaporized. When the angle is too large, resistance to the flue gas will be formed, and the flue gas cannot be well contacted with the liquid surface, thereby reducing the gasification rate. The main force of the flue gas flow is gravity and inertial force. According to the gradient design and calculation of the maximum flow rate ejected by the nozzle and the experimental flow rate, the optimal solution of the angle is obtained.

The main feature of the present invention is that the center of the throwing disc is provided with an upwardly erected sharp corner. This sharp corner is used as a connection structure, and the downwardly sprayed flue gas in the nozzle structure of the gasifier can be well received. The invention reduces the angle of the sharp angle as much as possible within the allowable range to make it sharp enough, which is conducive to reducing the resistance of the flue gas in the downward jet, eliminating dullness, and thus playing a very good role. diversion effect. The arc shape of the throwing disc is beneficial to guide the flue gas upwards. The most noteworthy place of the present invention is the hexagonal contact hole on the surface of the parabolic disc. When the mechanism works in the gasification equipment, its surface will be in contact with the liquid to be gasified, which is in the prior art. Totally not considered. The selection of hexagonal contact holes involves high opening rate, high contact rate, material saving, high utilization rate, space saving and beautiful design. Better arrangement than circle, and hexagon is beneficial to reduce the tension of water surface, it is not easy to form spherical film, it is more conducive to the mixing and contact of gas and liquid than other shapes, and increases gasification. When the liquid to be gasified and the When the disc throwing structure is in contact, due to the hexagonal holes on the surface, it remains tangent to the liquid surface, which greatly increases the contact surface between the flue gas and the liquid to be vaporized, and the liquid film formed between the hexagon and the liquid The contact has great tension, which is conducive to gasification, expansion of liquid, accelerated heat transfer, and high degree of gasification.

The structure is preferably detachable, and different shapes or numbers can be designed on the surface of the disc. The significance of this is that the degree of gasification is not high. When the rate of gasification is slow, different shapes can be replaced, and the guide holes of different numbers of contact holes can be replaced. The flow structure can artificially control the amount of gasification and the rate of gasification.

Compared with the prior art, the present invention increases the gasification contact area in the working state through the hexagonal contact holes on the surface of the disc, makes it fully gasified, and has the effect of accelerating heat and mass transfer. The structure can also be used in other diversion equipment and gasification equipment, and has a wide range of uses and a high utilization rate.

Description of drawings

Fig. 1 is the partial schematic diagram of gasification equipment;

2 is a schematic side view of the diversion structure of the present invention;

3 is a schematic top view of the diversion structure of the present invention;

FIG. 4 is a schematic diagram of the diversion structure of the present invention.

In the figure, 1 is a guide structure, 11 is a throwing disc, 12 is a sharp corner, 13 is an arc flanging, 14 is a hexagonal contact hole, and 2 is a nozzle structure.

Detailed ways

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Example 1

A disc throwing hole-shaped diversion structure inside a gasification device, as shown in Figures 2 to 4, includes a throwing disc 11, the center of the throwing disc 11 is provided with a raised sharp corner 12, and the edge is The arc-shaped flanging 13 is formed by turning upward and outward at the upper part, and a plurality of hexagonal contact holes 14 are arranged in the throw-shaped disc 11; during operation, the bottom of the throw-shaped disc 1 is tangent to the liquid surface. The diversion structure is applied to the gasification equipment as shown in Figure 1 (the equipment as a whole is a vertical structure distribution, the furnace is divided into upper and lower parts, the upper part of the coil (not shown in the figure) is hovering around the combustion chamber, and the lower part is coiled around the combustion chamber. Partly immersed in water for preheating, the flue gas after combustion in the combustion chamber is sprayed from the nozzle, and the sprayed high-temperature flue gas is sprayed onto the throwing disc). The flue gas coming out is in good contact with the water surface of the bottom pool, increasing gasification and enhancing heat exchange, and then the high-temperature water flue gas enters the circular coil in the upper part again under the drainage of the throwing plate, and conducts condensation heat exchange. It has the characteristics of increasing the contact area, fully reacting gas and liquid, and reducing energy consumption, thereby enhancing heat and mass transfer and improving the efficiency of gasification. In addition, the new type of hole-shaped diversion structure can be provided with different apertures and different shapes of ventilation holes on its surface. The size, quantity and shape of the ventilation holes can sense the speed of the degree of gasification. According to the demand for natural gas to be heated, it can be artificially carried out. The degree of gasification, regulating the rate of heating natural gas, saving energy and improving efficiency.

Preferably, a plurality of hexagonal contact holes 14 are distributed on a plurality of circles centered on the center of the circular disc 11 to form a multi-circle contact hole group. Further preferably, the hexagonal contact holes 14 of each contact hole group are evenly distributed along the circumference. , the size of the hexagonal contact hole 14 of the outer ring contact hole group is larger than the size of the hexagonal contact hole 14 of the inner ring contact hole group. In this embodiment, the plurality of hexagonal contact holes 14 form two contact hole groups, and the hexagonal contact holes 14 of the two contact hole groups have different ratios of side lengths according to the different spraying speeds at the nozzle, and the optimal The choice is 1.1-1.25:1. This is because the speed of the flue gas ejected from the nozzle is as high as 33m/s, and it is a high temperature, and it is considered to be an incompressible fluid with turbulent flow. The distance between the center of the hexagonal contact hole 14 of the outer ring contact hole group and the center of the throwing disk 11 is 1.5-1.7 times the distance between the center of the hexagonal contact hole 14 of the inner ring contact hole group and the center of the throwing disk 11 . Preferably this value is 1.6. This can not only ensure the diversion effect of the disc structure, but also ensure the best gasification effect. In this embodiment, the distance between the center of the hexagonal contact hole 14 of the inner ring contact hole group and the center of the throwing disc 11 is 150 mm, and the distance between the center of the hexagonal contact hole 14 of the outer ring contact hole group and the center of the throwing disc 11 is 150 mm. The distance is 240mm.

Preferably, the hexagonal contact hole 14 is a regular hexagonal contact hole, and one side of the hexagonal contact hole 14 faces the center of the circular disc 11 . Between the sharp corners 12 and the arc-shaped flanges 13 on the throwing disc 11 is a plane portion, and the hexagonal contact holes 14 are distributed on the plane portion. It is advisable to have about 8-9 openings for the inner ring contact holes, and 11-12 openings for the outer ring contact holes. In this embodiment, the inner ring contact hole group is distributed with 9 hexagonal contact holes 14 and the outer ring There are 12 hexagonal contact holes 14 distributed in the ring contact hole group, the side length of the hexagonal contact hole 14 of the inner ring is 25.1 mm, and the side length of the hexagonal contact hole 14 of the outer ring is 28.72 mm. No holes are used at the arc-shaped flanges, and the hole rate of the flat portion of the throw-shaped disc 11 may be 35-45%. In this embodiment, it is preferably about 39%. This is in the calculation of the present invention, the velocity of the high-temperature flue gas ejected from the nozzle can reach 33m/s, and the temperature is about 1200K. The sprayed flue gas is considered to be an incompressible fluid with turbulent flow, and the high-temperature flue gas is sprayed to the bottom pool, The water needs to be gasified, so the throwing disc structure is very important, and the opening ratio of the gasification structure is about 40%, which is conducive to the sprayed flue gas and the bottom of the disc. The water has better and more complete contact, and the original unopened one will not have such a high vaporization rate. If the opening rate of the disk continues to increase, the entire disk structure will be very fragile and cannot withstand such a large speed. and high temperature flue gas, and the effect of diversion is weakened, which reduces the heat exchange efficiency.

Preferably, the shape of the sharp corner 12 is that the top end is an acute angle, and the angle increases downward successively, and is in the shape of a pointed head; When the number of sharp angles is too small, it is not easy to play a good guiding effect on the sprayed flue gas, so when the high-speed sprayed flue gas contacts the disc, it will cause the disc to splash and cannot be well vaporized. When the angle is too large, resistance to the flue gas will be formed, and the flue gas cannot be well contacted with the liquid surface, thereby reducing the gasification rate. The main force of the flue gas flow is gravity and inertial force. According to the gradient design and calculation of the maximum flow rate ejected by the nozzle and the experimental flow rate, the optimal solution of the angle is obtained.

After the hexagonal contact holes 14 are added to the structure, the vaporization rate of the liquid to be vaporized is greatly improved. It is of great significance to greatly improve the utilization of energy and reduce energy consumption.

The foregoing description of the embodiments is provided to facilitate understanding and use of the invention by those of ordinary skill in the art. It will be apparent to those skilled in the art that various modifications to these embodiments can be readily made, and the generic principles described herein can be applied to other embodiments without inventive step. Therefore, the present invention is not limited to the above-mentioned embodiments, and improvements and modifications made by those skilled in the art according to the disclosure of the present invention without departing from the scope of the present invention should all fall within the protection scope of the present invention.

Claims (10)

1. A disc throwing hole-shaped diversion structure inside a gasification device, characterized in that it comprises a throwing disc (11), and the center of the throwing disc (11) is provided with a raised sharp corner (11). 12), the edge is turned upward and everted to form an arc-shaped flanging (13), and a plurality of hexagonal contact holes (14) are arranged in the throwing disc (11); The bottom is tangent to the liquid surface. 2. The inner disc throwing hole-shaped diversion structure of a gasification device according to claim 1, wherein the plurality of hexagonal contact holes (14) are distributed on the throwing disc (14). 11) Multiple circles of contact hole groups are formed on multiple circles whose center is the center of the circle. 3 . The inner disc throw-shaped hole-shaped diversion structure of a gasification device according to claim 2 , wherein the hexagonal contact holes ( 14 ) of each contact hole group are evenly distributed along the circumference. 4 . 4. The inner disc throw-shaped hole-shaped diversion structure of a gasification device according to claim 2 or 3, wherein the size of the hexagonal contact holes (14) of the outer ring contact hole group is larger than that of the inner ring Dimensions of the hexagonal contact holes (14) of the contact hole group. 5. The inner disc throw-shaped hole-shaped diversion structure of a gasification device according to claim 4, wherein the plurality of hexagonal contact holes (14) form two contact hole groups, and the two circles of contact holes The ratio of the side lengths of the hexagonal contact holes (14) of the group is 1.1-1.25:1. 6 . The inner disc throwing hole-shaped diversion structure of a gasification equipment according to claim 4 , wherein the center of the hexagonal contact hole ( 14 ) of the outer ring contact hole group and the throwing disc ( 6 . 11) The distance between the centers is 1.5-1.7 times the distance between the center of the hexagonal contact hole (14) of the inner ring contact hole group and the center of the throwing disc (11). 7. The inner disc throw-shaped hole-shaped diversion structure of a gasification device according to claim 1, wherein the hexagonal contact hole (14) is a regular hexagonal contact hole, and the hexagonal contact hole (14) One side of 14) faces the center of the throwing disc (11). 8. The inner disc throwing hole-shaped diversion structure of a gasification device according to claim 1, wherein the sharp corners (12) and the arc-shaped flanges (13) on the throwing disc (11) ) is a plane portion on which the hexagonal contact holes (14) are distributed. 9 . The inner disc throw-shaped hole-shaped diversion structure of a gasification device according to claim 8 , wherein the porosity of the plane portion of the throw-shaped disc ( 11 ) is 35 to 45 . 10 . %. 10. The inner disc throwing hole-shaped diversion structure of a gasification device according to claim 1, wherein the top of the sharp angle (12) is an acute angle, and the downward angle increases in turn, and the sharp angle is sharp. Head-shaped; the angular size of the acute angle at the top of the horn (12) is 30-35°.

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