WO2015144032A1 - Solid fuel combustion device - Google Patents

Abstract

A solid fuel combustion device, wherein one side of a hearth forms an air inlet side (101), and the other side, opposite to the air inlet side (101), of the hearth forms a combustion side (102). A closed section (41) for preventing airflow from passing through is formed between the edge of an aperture structure for discharging ash of a fire grate (4) and the inner wall of the hearth on the air inlet side (101). The combustion device improves the combustion efficiency.

Description

Solid fuel combustion device Technical field

This invention relates to the field of solid fuel combustion, and more particularly to a solid fuel combustion apparatus.

Background technique

From the perspective of fuel classification, solid fuels are the most widely used combustion materials, especially coal, because of their abundant resources and safe use. In addition, with the increase in the demand for mineral solid fuels represented by coal, the reduction of resources, and the development of global new energy campaigns, renewable biomass burning materials such as straw, straw, wood, wood chips, The dead branches and the like are highly valued by people.

At present, the main way of using biomass burning materials is to ignite combustion directly. This method has very low combustion efficiency and generates a large amount of black smoke, causing environmental pollution.

Many people have been trying to burn biomass fuels with existing coal-fired stoves. Since the burning characteristics of biomass burning materials and mineral burning materials with high fixed carbon content are quite different, the existing burning stoves cannot adapt to the combustion of solid fuels composed of renewable biomass materials, causing combustion. The efficiency is low, and there are problems such as emission pollution, which restricts the application of biomass burning materials. In addition, the coal currently used in large quantities is high-grade coal with relatively high fixed carbon content, such as anthracite, bituminous coal, etc. Some low-grade coals, such as lignite, peat, etc., also use existing combustion devices, and also have low combustion efficiency. Black smoke and other issues, so it has not been widely used.

The inventors have found through careful study that the main difference between biomass burning materials and low-grade coal (such as lignite, peat, etc.) and high-grade coal is that high-grade coal has a high fixed carbon content (generally over 90%). Therefore, it is mainly fixed carbon combustion mode when burning; while biomass combustion materials and low-grade coal have relatively low fixed carbon content and relatively high volatile content (about 50%-70%). The solid fuel with high volatile content mainly has two characteristics: 1) the volatile matter precipitation temperature is lower than the volatile ignition point; 2) the volatile matter has a higher ignition point than the ash melting point.

The current combustion furnaces are generally classified into two types: a forward combustion furnace and a reverse combustion furnace. Due to the above characteristics of biomass fuel and low-grade coal, continuous combustion can not be achieved by using these two combustion furnaces.

When using existing forward combustion furnaces, there are the following problems:

1) Low combustion efficiency. During combustion, since the precipitation temperature of the volatile matter is lower than the ignition point of the volatile matter, the volatile matter is first precipitated and discharged into the air in the form of black smoke, and the remaining fixed carbon portion is further burned, so that only the fixed carbon combustion is utilized. The heat generated is not only low in combustion efficiency, but also has emission pollution.

2) Can not continue to burn. The existing combustion device generally enters the wind through the furnace, so that the solid fuel on the furnace is subjected to high-temperature combustion. Since the ash melting point is lower than the ignition point of the volatile matter and the fixed carbon, the combustion is performed in a high-temperature environment in which the carbon is burned on the furnace. After the ash is in a viscous molten state, it will paste on the furnace and cannot be normally discharged through the furnace or other ash-discharging mechanism (such as the ash stick), so that the viscous ash is mixed and burning. The fuel has greatly affected Fuel combustion efficiency. Moreover, the viscous ash adheres to the furnace raft and blocks the air inlet passage on the furnace. After a period of time, the furnace is pasted, so that the furnace cannot continue to work.

The characteristic of the trans-burning furnace is that the fire outlet is lower than the furnace, so that the flame generated by the combustion passes through the furnace and then reaches the fire exit. This combustion mode can be ignited by the flame when passing through the furnace as compared with the forward combustion, and the combustion efficiency is improved. However, since the high temperature flame is located in the furnace position, this also makes the temperature of the furnace position very high. In the high temperature environment, the burnt ash is in a viscous molten state, which will paste on the furnace and block the furnace. The air flow passage will soon ruin the furnace, making the furnace unable to continue working.

The Chinese utility model patent No. 01220213695.8 proposes a hot blast stove 900 which can be used for full combustion of various solid combustibles and multi-point air distribution. As shown in FIG. 2, the hot blast stove includes a furnace body, and an upper combustion chamber 92 and a lower combustion chamber 93 are respectively disposed in the furnace body, and an upper furnace 94 and a lower furnace are respectively disposed at the bottoms of the upper combustion chamber 92 and the lower combustion chamber 93, respectively. 95. Below the lower furnace 95 is a ash removal chamber 96, and a burner outlet 98 is provided on the furnace body of the lower combustion chamber 93. The upper combustion chamber 92 is provided with a funnel-shaped combustion chamber 910 whose upper portion is integrated with the inner wall of the furnace, and whose lower portion is reduced in diameter. The lower port of the funnel-shaped fuel tank 910 is located on the upper furnace 94, and the center of the funnel-shaped fuel tank 910 A cylindrical pyrotechnic passage 911 having a lower end opening is formed in the longitudinal direction, and an annular upper air passage 912 is formed between the outer wall of the lower portion of the funnel-shaped fuel storage tank 910 and the inner wall of the furnace body 91, and the outer wall of the lower cylinder of the funnel-shaped fuel storage tank 910 is evenly opened. There are a plurality of air inlet holes 913. The outer wall of the furnace body 91 is provided with two air inlets 914 communicating with the annular air duct, and the air inlet 914 is connected with the air duct 915.

The hot blast stove attempts to solve the problems of forward combustion and trans combustion by combining positive and negative combustion. However, when the hot blast stove 900 is used, it has the following defects and cannot be continuously used:

1) Since the upper combustion chamber 92 and the lower combustion chamber 93 are separated by the upper furnace 94, during the combustion process, the fuel which is not completely burned in the upper combustion chamber 92 needs to fall into the lower combustion chamber 93 to continue burning, if it falls into The burning rate of the incompletely combusted fuel in the lower combustion chamber 93 cannot match the speed at which the upper furnace 93 is dropped to the lower combustion chamber 93, and the incompletely combusted fuel in the lower combustion chamber 93 is more and more, for a period of time. After that, the outlet port 98 in the lower combustion chamber 93 is blocked, and not only the combustion cannot be continued, but also the gas in the combustion chamber may emerge from the air inlet, which may cause a safety accident. However, due to the difference in the burning speed of different fuels, it is difficult to ensure that the combustion speeds of the upper and lower combustion chambers are completely matched during actual use, so that there is an unsafe hidden danger when the hot blast stove is used.

2) The fuel is burned in the upper combustion chamber 92, and the flame needs to pass through the upper furnace to enter the lower combustion chamber, so that the temperature of the upper furnace is still high, and there is still a problem of melting on the upper furnace, burning for a period of time. After that, the molten ash from the upper furnace binds the fuel on the upper furnace together, and cannot be discharged to the lower combustion chamber through the upper furnace. The fuel can only be burned in the upper combustion chamber, and the ash on the upper furnace is finally completely The upper furnace is stuck, which causes the hot stove to not work continuously.

3) As shown in Fig. 2, in order to improve the combustion efficiency, the hot air furnace has a large amount of air from the lower furnace 95 at the bottom of the lower combustion chamber 93, causing the temperature of the lower furnace 95 to be too high, and some solid biomass fuels ( The ash melting point of the straw is relatively low, so that the hot blast stove generates a ashing phenomenon when burning the solid biomass fuel, so that the ash produced by the combustion is in a viscous molten state and is bonded to the furnace 95. So after working in the hot blast stove for a period of time, the seam of the lower furnace 95 The gap is melted and can not effectively discharge ash, which makes the stove unable to work continuously.

Therefore, it is necessary to provide a solid fuel burner suitable for combustion of a solid fuel (e.g., biomass fuel) having a high volatile content to overcome the above-mentioned drawbacks of the existing combustion furnace and to achieve orderly controlled combustion of the solid fuel.

Summary of the invention

It is an object of the present invention to provide a solid fuel combustion apparatus which not only can fully burn volatile matter in a solid fuel, but also solves the problem of welding, and achieves a natural matching of the burning speed during the combustion process, thereby ensuring the fuel. Continuous burning.

A further object of the present invention is to provide a combustion apparatus for a solid fuel, which prevents the combustion-supporting gas entering the furnace from penetrating through the edge or thinner portion of the pile layer above the furnace, and enters the combustion chamber through the furnace to ensure the advancement. The combustion-supporting gas on the wind side enters the combustion chamber laterally from above the furnace to achieve the best combustion effect.

In order to achieve the above object, the present invention provides a solid fuel combustion apparatus comprising a furnace having an air inlet and a solid fuel feed port on a furnace, the feed port being disposed at the top of the furnace and corresponding to the furnace The feed port is provided with a furnace for receiving solid fuel entering from the feed port; one side of the feed port is formed as an inlet side, and the other side opposite the inlet side is formed as a combustion side; Forming a combustion chamber that is electrically connected to the exhaust gas outlet; wherein the furnace has a void structure for ash discharge, at least the gap between the edge of the gap structure of the furnace on the inlet side and the inner wall of the furnace is arranged to prevent airflow Closed section.

The working device of the present invention operates on the principle that the fuel entering from the feed port falls on the furnace to form a pile layer such that the pile layer is located between the inlet side and the combustion side; when burning, the pile is ignited The layer enters the wind from the inlet side of the pile layer, the wind crosses the pile layer laterally, passes through the combustion side of the pile layer, the combustion flame burns toward the combustion chamber, and the fuel gradually moves down as the volume becomes smaller, new The fuel is automatically replenished to the pile layer under the action of gravity, and is heated to precipitate volatiles; the volatiles from the wind exiting from the combustion side of the pile layer and flowing toward the combustion chamber, and the volatiles are burned toward the combustion chamber. The combustion flame ignites and enters the combustion chamber to burn, and the combustion exhaust gas is discharged from the exhaust gas outlet; at the same time, the fixed carbon fuel after the volatile matter is ignited, and the fixed carbon combustion is performed to generate a new combustion flame, and the ash generated after the burnout passes through the stack layer. The furnace at the bottom is discharged, and as the combustion progresses, a new combustion fuel is continuously replenished on the pile layer to form a combustion cycle.

In the combustion process, the volatile matter is precipitated in the fuel and the fixed carbon combustion is carried out in the stacking layer. As the combustion progresses, the volume of the fuel becomes smaller after the volatiles are precipitated, and automatically moves downward under the action of gravity, and is gradually moved to the lower layer. The combustion flame ignites, the new fuel is automatically replenished from the feed port to the stacking layer, and the fixed carbon combustion of the lower layer fuel provides the heat required for the precipitation of the upper layer new fuel volatiles. The replenishing speed of the new fuel depends on the combustion of the lower layer fuel. The speed, thus naturally achieving the matching of the upper volatiles precipitation and the fixed carbon fuel burning speed, effectively solves the safety hazard problem of the existing hot air furnace due to the mismatch of the burning speed.

At the same time, during the combustion process, the fuel newly added to the pile layer is heated by the lower layer of fixed carbon fuel, and the volatile matter is discharged toward the combustion chamber, and the lower layer of fixed carbon fuel is burned to generate a flame, which is also driven by the airflow toward the combustion chamber. Burning burn. When the volatile matter passes through the combustion flame, it is ignited by the high temperature generated by the combustion flame, thereby achieving sufficient combustion of the volatile matter. Moreover, since the combustion apparatus of the present invention can automatically and orderly feed by gravity with the progress of combustion, the combustion furnace can be placed in an unattended operation state, which not only saves labor, but also causes the pile layer to be in a dynamic equilibrium state. The fixed carbon combustion and volatile matter precipitation have been in a continuous and stable combustion state, which effectively ensures the full combustion of the volatiles, improves the combustion efficiency, and realizes the orderly controllable combustion of the combustion furnace.

Further, since the present invention introduces air from one side of the stack layer, a combustion chamber is provided on the combustion side opposite to the inlet side of the stack layer. In this way, under the action of the airflow, the high-temperature flame of the lower layer fixed carbon combustion passes through the combustion side of the pile layer, forming a high-temperature flame zone on the combustion side, providing the high-temperature environment required for ignition of the volatile matter, and the pile layer is at the bottom. There is almost no airflow through the furnace location, so there is no high temperature fire bed at the bottom furnace location. Moreover, as the combustion progresses, the fixed carbon fuel whose volume becomes smaller gradually moves downward, and the longer the burning time, the lower the fixed carbon fuel is located, so that the lower the fixed carbon combustion layer is lower, the lower the temperature, the combustion station The generated ash is also discharged into the lower ash chamber through the bottom furnace under the action of gravity under the action of the fixed carbon fuel, which effectively solves the problem of the ash existing in the existing combustion furnace and ensures the burning furnace. Continuous and stable combustion.

In addition, in the present invention, a closed section for preventing the passage of airflow is provided between the edge of the gap structure of the furnace on the inlet side and the inner wall of the furnace, and the closed section effectively blocks the airflow from the inlet side so that it cannot be removed from the The part goes directly to the burning side. Therefore, even if the inlet layer is located at the edge of the pile layer above the furnace, the thickness of the layer is thin, or in the state of no fuel, the wind entering the inlet side cannot pass through the furnace directly from the portion to the combustion side. Therefore, it is ensured that the wind on the inlet side passes through the material layer and then enters the combustion side, maximally utilizing the combustion efficiency of the wind.

In an alternative embodiment of the invention, the closure section is disposed horizontally or obliquely downwardly from the junction with the inner wall of the furnace.

In an alternative embodiment of the invention, the closure section is formed by a barrier member having one side that interfaces with the inner wall of the furnace and blocks the edge of the furnace.

In an alternative embodiment of the invention, the blocking member is formed by a flap or a stop.

In an alternative embodiment of the invention, the closed section is formed by a support portion projecting from the inner wall of the furnace, the grate edge being supported on the support portion.

In an alternative embodiment of the invention, the closed section is formed by a length of edge portion other than the grate void structure.

In an alternative embodiment of the invention, the furnace is in contact with the inner wall of the furnace at opposite sides between the inlet side and the combustion side.

In an alternative embodiment of the invention, the solid fuel forms a stack layer between the feed port and the furnace, the stack layer being opposite the inner wall of the furnace at two opposite sides between the inlet side and the combustion side. Connected to isolate the inlet side from the combustion side by the stack.

In an alternative embodiment of the invention, the side wall of the two opposite side inner walls between the inlet side and the combustion side of the furnace above the furnace is between the inlet side and the combustion side of the stack layer The natural stacking slopes that can be formed on both sides are consistent or Located on the inside of the natural stacking slope, the two sides of the stack layer between the inlet side and the combustion side are in contact with the inner wall of the furnace.

In an alternative embodiment of the invention, the grate is spaced from the inner wall of the grate at one edge of the combustion chamber.

In an alternative embodiment of the invention, the combustion chamber has two or more.

In an alternative embodiment of the invention, the combustion chamber is coupled to a heat exchange device.

Tests have shown that in the present invention, the wind entering from the inlet side is substantially entirely passed from above the furnace through the pile layer and into the combustion side. Therefore, even if the inlet layer is located at the edge of the pile layer above the furnace, the thickness of the layer is thin, or in the absence of fuel, the wind entering from the inlet side cannot pass through the thickness of the layer, or The furnace at the edge of the fuel-free portion directly enters the combustion side, thereby ensuring that the wind on the inlet side passes substantially through the layer and enters the combustion side, maximally utilizing the combustion-supporting efficiency of the wind.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any inventive labor.

1 is a schematic structural view of a conventional positive and negative hot air furnace;

2 is a schematic view showing the structure and combustion principle of the combustion apparatus of the present invention;

3 is a side cross-sectional structural view of the side of the inlet side and the side of the combustion side of the combustion apparatus of the present invention;

Figure 4 is an enlarged schematic view of the structure of the portion B of Figure 2;

Figure 5 is a schematic view showing the structure of the A-A cross section of Figure 2 of the combustion apparatus of the present invention;

Figure 6 is a schematic view showing a second embodiment of the closed section of the B-part structure of the combustion apparatus of the present invention;

Figure 7 is a schematic view showing a third embodiment of the closed section of the B-part structure of the combustion apparatus of the present invention;

Figure 8 is a schematic view showing a fourth embodiment of the structure of the B portion of the combustion apparatus of the present invention;

Figure 9 is a schematic view showing a fifth embodiment of the structure of the B portion of the combustion apparatus of the present invention;

Figure 10 is a schematic view showing a sixth embodiment of the structure of the B portion of the combustion apparatus of the present invention;

Figure 11 is a schematic view showing a seventh embodiment of the structure of the B portion of the combustion apparatus of the present invention;

Figure 12 is a schematic view showing an eighth embodiment of the structure of the B portion of the combustion apparatus of the present invention;

Figure 13 is a schematic view showing a ninth embodiment of the structure of the B portion of the combustion apparatus of the present invention;

Figure 14 is a schematic view showing a tenth embodiment of the structure of the B portion of the combustion apparatus of the present invention;

Figure 15 is a schematic view showing the structure of a combustion apparatus of the present invention having two combustion chambers.

Description of the figure:

Combustion device 100; heat exchange device 200; exhaust gas discharge port 201;

Furnace 10; inlet side 101; combustion side 102; inlet side furnace inner walls 103, 104;

Stack layer 1; two opposite sides 161, 162; natural stacking slope 16; feed port 11; air inlet 12; side wall 13; opening 132; feed hopper 15;

Combustion chamber 3; combustion chamber outlet 31; ash chamber 32;

Furnace 4; closed section 41; ash gap structure 42; blocking member 43; blocking support 44

a horizontal closed section 411 formed by the edge of the hearth; a downwardly inclined closed section 412 formed by the edge of the hearth;

a horizontal blocking piece 431; a downwardly inclined blocking block 432; and a horizontal blocking support 441 integrally formed with the furnace;

Forming a triangular blocking support 442 integrally with the furnace; a triangular support blocking block 443;

Solid fuel 5; volatile matter 51; fixed carbon fuel 52 after volatilization; furnace ash 53.

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.

The present invention provides a solid fuel combustion apparatus 100. As shown in FIGS. 2 to 15, the combustion apparatus 100 includes a furnace 10 on which an air inlet 12 and a solid fuel feed port 11 are provided, and the feed port 11 is provided at the top of the furnace 10 in the furnace 10. Corresponding to the feed port 11, a furnace 4 for receiving the solid fuel 5 entering from the feed port 11 is provided, and a furnace above the furnace 4 on the side of the feed port 11 is formed as an air supply for supplying air from the air inlet 12. The side 101, the other side furnace 10 of the feed port 11 opposite to the inlet side 101 is formed as a combustion side 102 for generating a combustion flame; and the combustion side 102 is formed with a combustion chamber 3 which is electrically connected to the exhaust gas outlet 201. Wherein the furnace 4 has a void structure 42 for ash discharge, at least the closed section 41 for preventing the passage of airflow between the edge of the ash gap structure 42 of the furnace 4 of the inlet side 101 and the inner wall of the furnace 10 .

The working principle of the present invention is that, as shown in FIG. 2 to FIG. 15, the solid fuel 5 is provided with a feed port 11 at the top of the furnace 10 into the furnace 10, and a stack layer 1 is formed on the furnace 4, above the furnace 4. The furnace 10 is formed on the side of the pile layer 1 as the inlet side 101, and the other side opposite the inlet side 101 is formed as the combustion side 102. The stack layer 1 isolates the inlet side 101 from the combustion side 102, and the pile layer 1 constitutes a partition between the inlet side 101 and the combustion side 102; the combustion side 102 is provided with a combustion chamber 3 connected to the exhaust outlet 201. . During combustion, the pile layer 1 is ignited, and air is introduced from the inlet side 101 of the pile layer 1, the wind passes transversely through the pile layer 1, and exits from the combustion side 102 of the pile layer 1, the wind is directed toward the combustion flame The combustion chamber 3 is burned, the fuel gradually moves down as the volume becomes smaller, and the new fuel is automatically replenished to the stack layer 1 under the action of gravity, and the volatiles 51 are heated to precipitate, and the volatiles 51 are deposited from the stack layer. The combustion side 102 of 1 flows out and flows toward the combustion chamber 3, and the volatile matter 51 is ignited by the combustion flame that is burned toward the combustion chamber 3, enters the combustion chamber 3 for combustion, and the combustion exhaust gas is discharged from the exhaust gas outlet 201; meanwhile, after the volatile matter 51 is precipitated Fixed carbon fuel 52 is ignited The carbon combustion produces a new combustion flame, and the ash 53 generated after the burnout is discharged through the furnace 4 at the bottom of the pile layer 1. As the combustion progresses, the new fuel continuously replenishes the pile layer 1 to form a combustion cycle.

In the present invention, a closed section 41 is provided between the edge of the ash gap structure 42 of the furnace 4 of the inlet side 101 and the inner wall of the furnace 10. The closed section 41 effectively blocks the flow from the inlet side 101 so that it cannot enter the combustion side 103 directly from the location. Therefore, even if the inlet side 101 is located at a thickness of the furnace layer 42 above the furnace 4, the thickness of the layer is thin, or in a state of no fuel, the wind entering the inlet side 101 cannot be thinner from the furnace layer. The edge 42 directly enters the combustion side 102; thereby ensuring that the wind on the inlet side 101 passes substantially through the pile layer 1 and then enters the combustion side 102, maximizing the combustion efficiency of the wind.

The stock layer 1 in the present invention refers to a pile formed of a solid fuel between the feed port 11 and the furnace 4. In the stacking layer 1, during the combustion process, the newly introduced fuel 5 in the upper layer is first heated to the volatile matter precipitation temperature to precipitate the volatile matter 51. Subsequently, the volatile fuel 5 is subjected to fixed carbon combustion, and gradually moves downward as the volume of the fuel 5 becomes smaller as the combustion progresses, and the ash 53 generated after the burnout is discharged through the furnace 4; meanwhile, the new fuel is under gravity Automatically replenished to the pile layer 1, and thus circulated, the pile layer 1 between the feed port 11 and the furnace 4 is in a state of dynamic equilibrium during combustion, maintaining a stable pile shape.

With the combustion apparatus 100 of the present invention, since the fuel is released from the volatile matter 51 and the fixed carbon combustion is in the furnace 10 above the furnace 4 during the combustion process, the volume of the fuel changes after the volatile matter 51 is precipitated as the combustion proceeds. Small, automatically moving downward under the action of gravity, and gradually ignited by the lower combustion flame, the new fuel is automatically replenished from the feed port 11 to the pile layer 1 under the action of gravity, and the fixed carbon combustion of the lower layer of fuel is the upper layer of fuel. The volatile matter is precipitated to provide the required heat, and the replenishing speed of the new fuel depends on the burning speed of the lower layer fuel, thereby naturally achieving a natural match between the precipitation of the upper volatile portion 51 and the burning rate of the fixed carbon fuel 52, effectively solving the existing hot blast furnace A safety hazard problem that does not match the burning speed.

Meanwhile, as shown in FIG. 2, during the combustion process, the volatiles 51 which are heated and precipitated by the lower fixed carbon fuel 52 are flowed toward the combustion chamber 3, and the lower fixed carbon fuel 52 is burned to generate a flame which is also directed toward the air. The combustion chamber 3 is burned, and when the volatile matter 51 passes through the combustion flame, it is ignited by the high temperature generated by the combustion flame, thereby achieving sufficient combustion of the volatile matter. Moreover, since the present invention can automatically and orderly feed by gravity with the progress of combustion, the combustion device can be placed in an unattended operating state, which not only saves manpower, but also because the stack layer 1 is in a state of dynamic equilibrium, the stack layer 1 Maintaining a stable stock shape during the combustion process, so that the fixed carbon combustion and volatile matter precipitation in the furnace 1 are always in a continuous stable combustion state, effectively ensuring full combustion of volatiles, improving combustion efficiency, and achieving combustion. Orderly controlled combustion of the device.

In addition, since the present invention provides a combustion chamber 3 from the combustion side 102 of the side of the stack layer 1 and opposite the inlet side 101, the main gas stream is passed transversely through the stack layer 1 from the combustion side 102, A high temperature flame zone is formed on the combustion side 102 of the stock layer 1 to provide the volatile 51 with a high temperature environment required for ignition to form a lateral combustion mode. This type of combustion, since the combustion flame is mainly concentrated on the side of the pile layer 1, there is no high temperature fire bed at the location of the furnace 4; And as the combustion progresses, the fixed carbon fuel with a smaller volume gradually moves down, and the longer the burning time, the lower the fixed carbon fuel is located, so that the lower the fixed carbon combustion layer in the lower part of the pile layer 1 is lower. The ash 53 produced by the combustion is also discharged into the lower ash chamber 4 through the bottom furnace 14 under the action of gravity by the downward movement of the fixed carbon fuel 52, thereby effectively avoiding the ash in the furnace position. The problems caused by the paste furnace and the like ensure the continuous and stable combustion of the combustion device.

Since the pile layer 1 is located at the edge of the bottommost layer of the inlet side 101, the thickness of the fuel layer is thin, or in the state of no material, the wind entering from the inlet side 101 is small because of the small wind resistance of the portion. From this location, the furnace 4 is penetrated into the combustion side 102. However, this part of the wind does not penetrate the pile layer 1 and directs most of the precipitated volatiles 51 to the combustion side 102, greatly affecting the combustion effect. At the same time, when the part of the wind flows under the furnace 4, it may have some combustion-supporting effect on the fixed carbon combustion above the furnace 4, so that the temperature at the edge position of the furnace 4 is increased, so that the edge of the furnace 4 is melted. The possibility of smoldering caused by ash. Therefore, in the present invention, a closed section 41 for preventing the passage of airflow is provided between the edge of the ash gap structure 42 of the furnace 4 located on the inlet side 101 and the inner wall of the furnace 10. The closed section 41 is fundamentally formed to prevent the wind in the inlet side 101 from entering the furnace 10 from below the furnace 4 at a lower wind resistance at the edge of the layer. It is ensured that most of the air flow on the air inlet side 101 passes transversely through the stack layer 1 from the combustion side 102 to a lateral combustion state. At the same time, it is also possible to make there is no air flow under the furnace 4, and it is ensured that a high temperature fire bed is not formed at the position of the furnace 4.

In an alternative embodiment of the invention, the closed section 41 is horizontally disposed as shown in Figures 2, 4, 7, 10, and 11.

In another alternative example of the present invention, the junction of the closed section 41 and the inner wall of the furnace 10 is inclined downwardly as shown in Figs. 6, 8, and 9. In the present embodiment, the downwardly inclined closing section 41 can discharge the ash at the closing section 41.

As shown in FIG. 7, FIG. 8, FIG. 9, FIG. 10 and FIG. 13, in an alternative embodiment of the present invention, the closing section 41 is constituted by a blocking member 43, one side of the blocking member 43 and the inner wall of the furnace 10. The edges of the grate 4 are joined to each other to form a closed section 41 of the present invention that blocks the passage of air. In the present example, the ash discharge void structure 42 having the ash discharge function is located at a portion where the barrier member 43 is not covered.

The blocking member 43 of the present invention is composed of a blocking piece 431. As shown in FIG. 7, FIG. 8, FIG. 10, the blocking piece 431 can be conveniently cut into an appropriate width according to the shape of the stack layer 1. The closed section 41 is formed by combining the furnaces 4. As shown in FIG. 8, the barrier sheet 431 may be horizontally coupled to the furnace 4 as shown in FIGS. 7 and 10, or may be obliquely coupled to the furnace 4 as shown in FIG.

As shown in FIG. 9, the blocking member 43 of the present invention may be constituted by a downwardly inclined blocking block 432 which is disposed above the furnace 4.

As shown in FIG. 13, the blocking member 43 of the present invention is constituted by a supporting blocking block 443 which is in contact with the inner wall of the furnace 10, is coupled below the furnace 4 and simultaneously forms a support for the furnace 4.

As shown in FIG. 10, FIG. 11, FIG. 12, FIG. 13, and FIG. 14, the closed section 41 of the present invention is protruded from the furnace 10 The support portion 44 of the inner wall is formed, and the edge of the furnace 4 is supported on the support portion 44.

In the present invention, the support portion 44 constituting the closing portion 41 is integrally formed with the furnace 10. Wherein: the support portion 44 constituting the closed portion 41 may be constituted by a horizontal support 441 integrally formed with the furnace as shown in FIG. 11 or by a triangular support 442 integrally formed with the furnace as shown in FIG. In the present embodiment, the support portion 44 (441, 442) is disposed below the furnace 4, and while supporting the furnace 4, effectively shields the ash gap structure at the edge of the furnace 4 to prevent airflow. Closed section 41. Further, a horizontal support 441 integrally formed with the furnace as shown in Fig. 14 is disposed above the furnace 4, and the furnace 4 is attached to the horizontal support 441 in a conventional manner.

As shown in FIG. 2, FIG. 4, FIG. 5, and FIG. 6, in an alternative embodiment of the present invention, the closed section 41 is formed by a portion of the edge portion other than the furnace void structure 43. In the present embodiment, the closed section 41 is formed by a horizontal closed section 411 formed by the edge of the hearth, and the horizontal closed section 411 is integrally formed in the furnace 4 such that the edge of the furnace 4 does not have an ash discharge structure. As shown in FIG. 2, FIG. 4, and FIG. 5, one end of the horizontal closing section 41 formed by the edge of the furnace is in contact with the inner wall of the furnace 10, thereby achieving the purpose of blocking the passage of airflow. As shown in FIG. 6, the closed section 41 is formed by an upwardly inclined closed section 412 formed by the edge of the furnace. In the present embodiment, the upwardly inclined closed section 412 can effectively block the airflow and facilitate the ash burning. It is discharged to the void structure of the furnace 4.

In summary, the closing section 41 of the present invention mainly functions to prevent the wind in the inlet side 101 from entering the furnace 10 from below the furnace 4 at a small wind resistance at the edge of the layer. It is ensured that most of the air flow on the air inlet side 101 passes transversely through the stack layer 1 from the combustion side 102 to a lateral combustion state. At the same time, it is also possible to make there is no air flow under the furnace 4, and it is ensured that a high temperature fire bed is not formed at the position of the furnace 4. Therefore, the closing section 41 can be constituted by any conventional structure other than the above, as long as the same effect of the closing section 41 as described above can be achieved.

As shown in Fig. 5, in an alternative example of the combustion apparatus 100 of the present invention, the edges of the furnace 4 can be connected to the inner wall of the furnace 10 to cover the entire area within the furnace. The setting of the furnace 4 is as long as it can receive the solid fuel, and the pile layer 1 is formed between the feed port 11 and the furnace 4, so that the solid fuel of the pile layer 1 can be prevented from falling directly, and the specific form thereof is not limited.

As shown in FIG. 3, in an alternative example of the combustion apparatus 100 of the present invention, the two opposite sides 161, 162 of the stack layer 1 between the inlet side 101 and the combustion side 102 are in contact with the inner wall of the furnace to furnace The space above the crucible 14 on the inlet side 101 is separated from the combustion side 102 by the stack layer 1. Thus, the airflow generated by the wind entering the air inlet side 101 can only pass through the stack layer 1 to reach the combustion side 102, avoiding the wind from passing outside the stack layer 1 and doing useless work, ensuring the wind passing through the stack layer 1. Effective supply.

In an alternative example, the side walls 103, 104 of the two opposite side inner walls between the inlet side 101 and the combustion side 102 of the furnace 10 above the furnace 4, and the stack layer 1 on the inlet side 101 The natural stacking slopes 16 that may be formed by the two sides 161, 162 between the combustion sides 102 are coincident or located inside the natural stacking slope 16 such that the two side wall faces 103 of the stack layer 1 between the inlet side 101 and the combustion side 102 104 is connected to the inner wall of the furnace, as shown in FIG.

As shown in FIG. 5, the furnace 4 is spaced from the inner wall of the furnace 10 at one side edge of the combustion chamber 10. burning process Among them, the ash of the pile layer 1 toward the side of the combustion chamber 102 can be more easily discharged from the interval.

As shown in Fig. 15, the combustion chamber 3 may be provided with two or more as needed to suit various actual heat exchange requirements.

As shown in Fig. 2, in the present invention, the combustion chamber 3 is connected to the heat exchange device 200 to utilize the heat generated by the combustion chamber 3. The heat exchange device 200 may be a heat exchanger for heating, a crucible, a cooker, a water jacket, or the like.

Experiments have shown that with the above-described lateral combustion mode combustion method and combustion apparatus of the present invention, the volatile matter can be almost completely burned, the combustion efficiency is as high as 95% or more, and there is no black smoke emission, and solid fuel combustion with high volatile content is realized. Clean emissions. The invention fully utilizes the characteristics of gravity and heat transfer, realizes automatic and orderly combustion of fuel, has simple structure, low manufacturing cost and convenient use, and provides favorable conditions for popularization and application of solid fuel with high volatile content.

The above description of the present invention is intended to be illustrative only, and various modifications that do not depart from the gist of the present invention are intended to be within the scope of the present invention. These variations are not to be regarded as a departure from the spirit and scope of the invention.

Claims (12)

A solid fuel combustion device includes a furnace having an air inlet and a solid fuel feed port on the furnace, wherein the feed port is disposed at the top of the furnace, and the feed port is disposed corresponding to the feed port in the furnace a furnace for receiving solid fuel entering from the feed inlet, a furnace above the furnace on one side of the feed inlet is formed as an inlet side, and the other furnace opposite to the inlet side is formed as a combustion side; Forming a combustion chamber that is electrically connected to the exhaust gas outlet; wherein the furnace has a void structure for ash discharge, and at least the edge of the furnace ash discharge structure on the inlet side is disposed between the edge of the furnace and the inner wall of the furnace to prevent airflow Closed section. A solid fuel combustion apparatus according to claim 1, wherein said closing section is horizontally disposed or disposed obliquely downward from a joint with the inner wall of the furnace. A combustion apparatus for a solid fuel according to claim 1 or 2, wherein said closing section is constituted by a stopper, one side of which is in contact with the inner wall of the furnace and blocks the edge of the furnace. A solid fuel combustion apparatus according to claim 3, wherein said blocking member is constituted by a flap or a stopper. A combustion apparatus for a solid fuel according to claim 1 or 2, wherein said closing section is constituted by a support portion projecting from an inner wall of the furnace, and said furnace edge is supported on said support portion. A solid fuel combustion apparatus according to claim 1 or 2, wherein said closed section is constituted by a portion of an edge portion other than the furnace void structure. A combustion apparatus for a solid fuel according to claim 1, wherein said furnace is in contact with the inner wall of the furnace at opposite sides between the inlet side and the combustion side. A combustion apparatus for a solid fuel according to claim 1, wherein said solid fuel forms a pile layer between the feed port and the furnace, the pile layer being between the inlet side and the combustion side The opposite sides of the furnace are in contact with the inner wall of the furnace so that the inlet side separates the inlet side from the combustion side. A combustion apparatus for a solid fuel according to claim 8, wherein a wall surface of said two opposite side inner walls between said air inlet side and said combustion side of said furnace above said furnace is in the air inlet with said stack layer The natural stacking slope formed by the two sides between the side and the burning side is uniform or located inside the natural stacking slope, so that the two sides of the stacking layer between the inlet side and the burning side are in contact with the inner wall of the furnace. A solid fuel combustion apparatus according to claim 1, wherein said furnace has a space at a side edge of the combustion chamber from an inner wall of the furnace. A combustion apparatus for a solid fuel according to claim 1, wherein said combustion chamber has two or more. A solid fuel combustion apparatus according to claim 1, wherein said combustion chamber is connected to a heat exchange device.

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