Pyrolysis gasification generator and biomass gasification furnace with same

Abstract

The utility model relates to a cracking gasification generator and a biomass gasification furnace with the same, which belong to the technical field of gasification furnaces, the cracking gasification generator comprises an annular pipe, the annular pipe is provided with a biomass gas inlet, a high-temperature gas inlet and gas distribution holes, a heat exchange cavity and a flow mixing cavity are arranged in the annular pipe, a flow guide heat exchange channel and a heating channel are arranged in the heat exchange cavity, and the heating channel is communicated with the flow guide heat exchange channel. One end of the flow guide heat exchange channel is communicated with the biomass gas inlet, the other end of the flow guide heat exchange channel is communicated with the mixed flow cavity, one end of the heating channel is communicated with the high-temperature gas inlet, the other end of the heating channel is communicated with the mixed flow cavity, and the gas distribution holes are distributed in the cavity wall of the mixed flow cavity. And the wood tar is fully subjected to heat exchange with high-temperature gas, so that the wood tar is subjected to a thermal chemical reaction with superheated water vapor, carbon powder and other airflow carriers in a high-temperature environment, the wood tar is synchronously cracked and catalyzed in the biomass gas production process, and the wood tar content in the biomass gas is greatly reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of gasification furnace, especially relates to a pyrolysis gasification generator and biomass gasification furnace with same. BACKGROUND

[0002] The biomass gasification furnace is a gasification furnace for manufacturing straw gas, and the existing fixed bed gasification furnace can be divided into an updraft type, a downdraft type and a horizontal suction type according to the gas flow direction. In the downdraft type gasification furnace, gas and materials are mixed and move downward, and part of wood tar in the gas is cracked into small molecule gas when passing through the lower high-temperature zone. The tar content of the discharged gas is 8000-10000 mg / Nm 3 , the operation is under micro negative pressure, the sealing requirement is not high, the output gas temperature is high, the heat value is medium, the material is mixed with coarse particles and has a water content of less than 30%; the gas flow and the material movement direction are opposite in the updraft type gasification furnace, the material moves downward, the gas flow moves upward, the operation is under micro positive pressure, the sealing requirement is high, the ash content in the combustible gas is small, and the material with a water content of 50% can be used. The tar content of the discharged gas is 8000-10000 mg / Nm 3 . Since there is no wood tar control device in the furnace, the wood tar content of the biomass gas produced is high.

[0003] Therefore, a pyrolysis gasification generator capable of reducing the wood tar content in biomass gas and a biomass gasification furnace with the same are urgently needed. INVENTION CONTENTS

[0004] The utility model provides a pyrolysis gasification generator and biomass gasification furnace with same to solve the technical problem of high wood tar content of biomass gas in the biomass gasification furnace in the prior art and the need for a secondary oil removal process.

[0005] The utility model discloses a pyrolysis gasification generator, including annular pipe, the annular pipe is equipped with biomass gas inlet, high temperature gas inlet and gas distribution hole, be equipped with heat exchange chamber and mixed flow chamber in the annular pipe, be equipped with flow guide heat exchange channel and heating channel in the heat exchange chamber, one end of the flow guide heat exchange channel is linked with the biomass gas inlet and is linked with the mixed flow chamber another end, one end of the heating channel is linked with high temperature gas inlet and is linked with the mixed flow chamber another end, the gas distribution hole is arranged on the chamber wall of the mixed flow chamber.

[0006] For better implementation of the utility model, further optimization is made in the above structure, and the utility model further comprises a flow guide pipe and a central pipe, end plates and ring plates are arranged in the annular pipe at intervals, the annular pipe is divided into the heat exchange cavity and the mixing cavity through the end plates and the ring plates, the flow guide pipe and the central pipe are arranged in the heat exchange cavity, one end of the central pipe is fixedly connected with the end plate, and the other end of the central pipe communicates with the mixing cavity, one end of the flow guide pipe is fixedly connected with the ring plate, and the other end of the flow guide pipe is sleeved outside the central pipe, the flow guide heat exchange channel comprises a flow guide channel and a heat exchange channel, the flow guide channel is formed between the flow guide pipe and the annular pipe, and the heat exchange channel is formed between the flow guide pipe and the central pipe, and the pipe hole of the central pipe is the heating channel.

[0007] For better implementation of the utility model, further optimization is made in the above structure, and the central pipe comprises a light pipe and a fish scale hole pipe, the light pipe and the fish scale hole pipe are integrated structural members, one end of the light pipe is fixedly connected with the end plate, and the other end of the light pipe is connected with the fish scale hole pipe.

[0008] For better implementation of the utility model, further optimization is made in the above structure, and the flow guide pipe is a structural member made of high-temperature-resistant composite material.

[0009] For better implementation of the utility model, further optimization is made in the above structure, and the annular pipe is a structural member made of heat-resistant steel.

[0010] A biomass gasification furnace comprises a furnace body, a circulating air device and a pyrolysis gasification generator, a plurality of annular pipes of the pyrolysis gasification generators are arranged in parallel and at intervals in the furnace body, an air inlet of the circulating air device communicates with a furnace cavity of the furnace body, an air outlet of the circulating air device communicates with a biomass gas inlet of the annular pipe, and a furnace wall of the furnace body is provided with a plurality of air holes, one end of the air hole communicates with a high-temperature gas inlet of the annular pipe at a corresponding position, and the other end of the air hole communicates with an external burner.

[0011] For better implementation of the utility model, further optimization is made in the above structure, and the circulating air device comprises a suction pipe and a plurality of circulating air fans, the suction pipe is vertically arranged at the center of the furnace body, a pipe wall of the suction pipe is provided with a plurality of air inlets, the top of the suction pipe is provided with a wind guide pipe, air inlets of the circulating air fans all communicate with the wind guide pipe, and air outlets of the circulating air fans communicate with biomass gas inlets of the annular pipes at corresponding positions.

[0012] For better implementation of the utility model, further optimization is made in the above structure, and the suction pipe comprises an inner pipe and an outer pipe, the wind guide pipe comprises an inner wind guide pipe and an outer wind guide pipe, the middle part of the outer pipe is provided with an annular baffle, the bottom of the inner pipe is fixedly connected with the annular baffle, the inner wind guide pipe communicates with the inner pipe, and the outer wind guide pipe communicates with the outer pipe.

[0013] In order to better realize the utility model, further optimization is made in the above structure, and the utility model further comprises an inclined baffle, and the upper portion of each air inlet is provided with the inclined baffle.

[0014] In order to better realize the utility model, further optimization is made in the above structure, and the utility model further comprises a rotating link and an iron anchor, the rotating link is arranged in the furnace body, and at least two iron anchors are hung on the rotating link

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] The pyrolysis gasification generator provided by the utility model comprises an annular pipe, the annular pipe is provided with a biomass gas inlet, a high-temperature gas inlet and a gas distribution hole, a heat exchange cavity and a mixed flow cavity are arranged in the annular pipe, a flow guide heat exchange channel and a heating channel are arranged in the heat exchange cavity, one end of the flow guide heat exchange channel is in communication with the biomass gas inlet, and the other end is in communication with the mixed flow cavity, one end of the heating channel is in communication with the high-temperature gas inlet, and the other end is in communication with the mixed flow cavity, and the gas distribution hole is arranged on the cavity wall of the mixed flow cavity. In the production process, the biomass gas rich in wood tar enters the flow guide heat exchange channel through the biomass gas inlet, thereby being fully heat-exchanged with the high-temperature gas entering from the high-temperature gas inlet, so that the wood tar, the superheated steam, the carbon powder and other flow carrying objects occur thermal chemical reaction in the high-temperature environment, thereby realizing the pyrolysis and catalysis of the wood tar in the biomass gas production process, greatly reducing the wood tar content in the biomass gas, and directly serving as industrial production without secondary tar removal.

[0017] The utility model further provides a biomass gasification furnace which comprises a furnace body, a circulating air device and a pyrolysis gasification generator, the annular pipes of the plurality of pyrolysis gasification generators are arranged in parallel and at intervals in the furnace body, the air inlet of the circulating air device is in communication with the furnace cavity of the furnace body, the air outlet of the circulating air device is in communication with the biomass gas inlet of the annular pipe, and the furnace wall of the furnace body is provided with a plurality of air holes, one end of the air hole is in communication with the high-temperature gas inlet of the annular pipe at the corresponding position, and the other end of the air hole is in communication with an external burner. By adopting the structure, the high-wood-tar-content biomass gas generated in the furnace body is continuously sent into the pyrolysis gasification generator by the circulating air device, so that the wood tar pyrolysis obtains low-wood-tar-content high-heat biomass gas which is discharged into the furnace body, thereby promoting the generation of new biomass gas from the materials in the furnace body, so that the wood tar pyrolysis and the generation of biomass gas are circular, the biomass gas yield is improved, and the wood tar content is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings described in the following are only some of the embodiments of the present application, and all other embodiments obtained by those of ordinary skill in the art without creative work based on these drawings are within the scope of the present application.

[0019] Figure 1 is the expanded view of the cracking gas generator in the present application;

[0020] Figure 2 is the structural schematic diagram of the biomass gasification furnace in the present application.

[0021] In the drawings:

[0022] 1 - annular pipe; 2 - biomass gas inlet; 3 - high-temperature gas inlet; 4 - air distribution hole; 5 - heat exchange cavity; 6 - mixed flow cavity; 7 - heating channel; 8 - flow guide channel; 9 - heat exchange channel; 10 - flow guide pipe; 11 - center pipe; 12 - end plate; 13 - ring plate; 14 - fish scale hole pipe; 15 - furnace body; 16 - air hole; 17 - inner pipe; 18 - outer pipe; 19 - circulating fan; 20 - air inlet; 21 - inner air guide pipe; 22 - outer air guide pipe; 23 - annular baffle; 24 - inclined baffle; 25 - rotating chain ring; 26 - iron anchor; 27 - feeding port; 28 - slag discharge port; 29 - exhaust pipe. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the present application more clear, the technical scheme of the present application will be described in detail below. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the scope of the present application.

[0024] In the description of the present application, it should be noted that, unless otherwise specified, the meaning of "multiple" is two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0025] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] Example 1:

[0027] In this embodiment, a pyrolysis gasification generator, such as Figure 1 As shown, the system includes an annular pipe 1, which has a biomass gas inlet 2, a high-temperature gas inlet 3, and a gas distribution hole 4. The annular pipe 1 has a heat exchange chamber 5 and a mixing chamber 6. The heat exchange chamber 5 has a guiding heat exchange channel 9 and a heating channel 7. One end of the guiding heat exchange channel 9 is connected to the biomass gas inlet 2 and the other end is connected to the mixing chamber 6. One end of the heating channel 7 is connected to the high-temperature gas inlet 3 and the other end is connected to the mixing chamber 6. The gas distribution hole 4 is arranged on the cavity wall of the mixing chamber 6. The biomass gas and the high-temperature gas enter the heat exchange chamber 5 through the guiding heat exchange channel 9 and the heating channel 7, respectively, so that the biomass gas is fully heated to crack the wood tar therein, and then enters the mixing chamber 6 to fully mix and form a biomass gas with low wood tar content.

[0028] With this structure, by embedding the generator inside the gasifier, the biomass gas rich in wood tar during the production process enters the heat exchange channel 9 through the biomass gas inlet 2, thereby fully exchanging heat with the high-temperature gas entering from the high-temperature gas inlet 3. This allows the wood tar to undergo a thermochemical reaction with the superheated steam, carbon powder, and other gas-carried materials in the biomass gas in a high-temperature environment, thus achieving simultaneous cracking and catalytic cracking of wood tar during the biomass gas production process. This significantly reduces the wood tar content in the biomass gas, allowing it to be used directly for industrial production without the need for secondary tar removal.

[0029] As one specific implementation method of this embodiment, such as Figure 1As shown, the device further comprises a flow guide pipe 10 and a center pipe 11, and specifically, the annular pipe 1 is divided into the heat exchange cavity 5 and the mixing cavity 6 by the end plate 12 and the ring plate 13, the flow guide pipe 10 and the center pipe 11 are coaxially arranged in the heat exchange cavity 5, one end of the center pipe 11 is fixedly connected with the end plate 12 and the other end communicates with the mixing cavity 6, one end of the flow guide pipe 10 is fixedly connected with the ring plate 13 and the other end is sleeved on the outside of the center pipe 11, wherein, the non-fixed end of the flow guide pipe 10 and the center pipe 11 are both arranged in suspension, the flow guide passage 8 and the heat exchange passage 9 are included in the flow guide heat exchange passage 9, the flow guide passage 8 is between the flow guide pipe 10 and the annular pipe 1, the heat exchange passage 9 is between the flow guide pipe 10 and the center pipe 11, the pipe hole of the center pipe 11 is the heating passage 7, the flow guide passage 8 communicates with the biomass gas inlet 2, the biomass gas needs to pass through the flow guide passage 8 and the heat exchange passage 9 in the heat exchange cavity 5, so that the heat exchange time and path are longer, the wood tar in the biomass gas can be more fully cracked, on the other hand, the high-temperature gas enters the heating passage 7 through the high-temperature gas inlet 3, the high-temperature gas flows through the center pipe 11 all the way, the temperature of the heating passage 7 is the highest, the temperature gradually increases from inside to outside through the center pipe 11 and the flow guide pipe 10, so that the heat exchange with the biomass gas is more sufficient, the heating process is longer, and the cracking efficiency of the wood tar is further improved, the flow guide pipe 10 is a structural member made of high-temperature resistant composite material, and the annular pipe 1 is a structural member made of heat-resistant steel, so as to improve the heat resistance of the whole device and improve the service life.

[0030] In the embodiment, the center pipe 11 comprises a light pipe and a fish scale hole pipe 14, the light pipe and the fish scale hole pipe 14 are an integral structural member, one end of the light pipe is fixedly connected with the end plate 12, the other end of the light pipe is connected with the fish scale hole pipe 14, and the fish scale hole pipe 14 prolongs the flow length of the gas inside and outside the pipe, thereby prolonging the residence time of the wood tar in the high-temperature zone, which is beneficial to the cracking of the wood tar.

[0031] Embodiment 2

[0032] In the embodiment, a biomass gasification furnace comprises a furnace body 15, a circulating air device and the cracking gasification generator, and specifically, a plurality of annular pipes 1 of the cracking gasification generator are arranged in parallel and at intervals in the furnace body 15, an air inlet of the circulating air device communicates with a furnace cavity of the furnace body 15, an air outlet of the circulating air device communicates with the biomass gas inlet 2 of the annular pipe 1, a furnace wall of the furnace body 15 is provided with a plurality of air holes 16, one end of the air hole 16 communicates with the high-temperature gas inlet 3 of the corresponding annular pipe 1, and the other end of the air hole 16 communicates with an external burner. Figure 2 As shown, the device further comprises a flow guide pipe 10 and a center pipe 11, and specifically, the annular pipe 1 is divided into the heat exchange cavity 5 and the mixing cavity 6 by the end plate 12 and the ring plate 13, the flow guide pipe 10 and the center pipe 11 are coaxially arranged in the heat exchange cavity 5, one end of the center pipe 11 is fixedly connected with the end plate 12 and the other end communicates with the mixing cavity 6, one end of the flow guide pipe 10 is fixedly connected with the ring plate 13 and the other end is sleeved on the outside of the center pipe 11, wherein, the non-fixed end of the flow guide pipe 10 and the center pipe 11 are both arranged in suspension, the flow guide passage 8 and the heat exchange passage 9 are included in the flow guide heat exchange passage 9, the flow guide passage 8 is between the flow guide pipe 10 and the annular pipe 1, the heat exchange passage 9 is between the flow guide pipe 10 and the center pipe 11, the pipe hole of the center pipe 11 is the heating passage 7, the flow guide passage 8 communicates with the biomass gas inlet 2, the biomass gas needs to pass through the flow guide passage 8 and the heat exchange passage 9 in the heat exchange cavity 5, so that the heat exchange time and path are longer, the wood tar in the biomass gas can be more fully cracked, on the other hand, the high-temperature gas enters the heating passage 7 through the high-temperature gas inlet 3, the high-temperature gas flows through the center pipe 11 all the way, the temperature of the heating passage 7 is the highest, the temperature gradually increases from inside to outside through the center pipe 11 and the flow guide pipe 10, so that the heat exchange with the biomass gas is more sufficient, the heating process is longer, and the cracking efficiency of the wood tar is further improved, the flow guide pipe 10 is a structural member made of high-temperature resistant composite material, and the annular pipe 1 is a structural member made of heat-resistant steel, so as to improve the heat resistance of the whole device and improve the service life.

[0033] With this structure, the biomass gas with high wood tar content generated in the furnace body 15 is continuously fed into the pyrolysis gasification generator through the circulating air device. This allows the wood tar to be pyrolyzed to produce high-heat biomass gas with low wood tar content, which is then discharged back into the furnace body 15. This, in turn, promotes the generation of new biomass gas from the materials in the furnace body 15. This cycle of pyrolyzed wood tar and generated biomass gas increases the biomass gas yield and reduces the wood tar content.

[0034] In this embodiment, as Figure 2 As shown, the furnace body 15 is provided with a feeding port 27 at the top. The furnace body 15 is filled with biomass material. Multiple pyrolysis gasification generators are installed vertically. Each pyrolysis gasification generator is supplied with high-temperature gas through an external burner, thereby heating the pyrolysis gasification generator and heating the material around it. This causes all the material in the furnace body 15 to react simultaneously to generate biomass gas, which is biomass gas with a high wood tar content. This biomass gas is absorbed by the circulating air device and pumped into each of the pyrolysis gasification generators to carry out wood tar pyrolysis reaction, resulting in biomass gas with a low wood tar content. This biomass gas is then discharged back into the furnace body 15 through the gas distribution hole 4. This cycle is repeated, causing the wood tar in the biomass gas to be repeatedly pyrolyzed, resulting in a significant reduction in the wood tar content in the biomass gas.

[0035] It is worth noting that by controlling the temperature of the circulating air device and the temperature of the biomass gas discharged into the furnace body 15, the biomass material in the furnace body 15 reacts to produce charcoal or activated carbon. Both charcoal and activated carbon can catalyze the cracking of wood tar. Water in the material, as well as carbon powder and other carried materials in the charcoal or activated carbon, are pumped together with the biomass gas into the cracking gasification generator by the circulating air device to further catalyze the cracking process and efficiency of wood tar. The bottom of the furnace body 15 is provided with a slag discharge port 28. After the reaction is completed, the charcoal or activated carbon can be discharged through the slag discharge port 28.

[0036] In this embodiment, as Figure 2As shown, the circulating air device includes a suction pipe and a plurality of circulating fans 19. Specifically, the suction pipe is vertically arranged at the center of the furnace body 15, and the circulating fans 19 are installed in the furnace body 15. Each of the annular pipes 1 is provided with one of the circulating fans 19. The wall of the suction pipe is provided with a plurality of air inlet holes 20. The top of the suction pipe is provided with a wind guide pipe. The air inlets of the circulating fans 19 are in communication with the wind guide pipe. The air outlets of the circulating fans 19 are in communication with the biomass gas inlets 2 of the annular pipes 1 at the corresponding positions. In use, the circulating fans 19 are started to form a negative pressure in the suction pipe, so that the biomass gas in the furnace body 15 is sucked into the suction pipe through the air inlet holes 20, and then enters the heat exchange cavity 5 of the annular pipe 1 through the wind guide pipe, the circulating fan 19 and the biomass gas inlet 2, so that the wood tar is cracked to form biomass gas with low content, and then is discharged into the furnace body 15 through the gas distribution holes 4, so as to heat the biomass material in the furnace body 15 to continuously generate new biomass gas, which is then sucked into the cracking gasifier by the suction pipe for cracking reaction, and the cracking is repeated until the content of wood tar in the biomass gas in the furnace body 15 reaches the minimum.

[0037] Further, as Figure 2As shown, the above-mentioned suction pipe comprises an inner pipe 17 and an outer pipe 18, the above-mentioned air guide pipe comprises an inner air guide pipe 21 and an outer air guide pipe 22, the middle part of the above-mentioned outer pipe 18 is provided with an annular baffle 23, the bottom of the above-mentioned inner pipe 17 is fixedly connected with the above-mentioned annular baffle 23, the above-mentioned inner air guide pipe 21 is communicated with the above-mentioned inner pipe 17, the above-mentioned outer air guide pipe 22 is communicated with the above-mentioned outer pipe 18, and the annular space between the above-mentioned inner pipe 17 and the outer pipe 18 is separated from the pipe hole of the outer pipe 18 below the above-mentioned annular baffle 23, the annular space between the above-mentioned inner pipe 17 and the outer pipe 18 absorbs the biomass gas in the space of the upper half of the above-mentioned furnace body 15, and the space of the pipe hole of the lower part of the above-mentioned outer pipe 18 absorbs the biomass gas in the space of the lower half of the above-mentioned furnace body 15. The biomass material in the above-mentioned furnace body 15 will gradually carbonize and become smaller in volume during the reaction process, and new biomass material will be continuously supplemented into the above-mentioned furnace body 15 through the above-mentioned feeding port 27 during the production process. As the production process proceeds, the lower part of the above-mentioned furnace body 15 is gradually filled with charcoal or activated carbon, and the upper part is filled with newly fed biomass material, so that the biomass gas in the above-mentioned pyrolysis gasification generator of the lower half of the above-mentioned furnace body 15 is cracked more completely, the content of wood tar near the bottom is lower, and the content of wood tar near the upper part is higher. By separating the annular space between the above-mentioned inner pipe 17 and the outer pipe 18 from the pipe hole of the outer pipe 18 below the above-mentioned annular baffle 23, the above-mentioned pyrolysis gasification generator of the lower half of the above-mentioned furnace body 15 only sucks and circulates the biomass gas of the lower half of the above-mentioned furnace body 15, and the above-mentioned pyrolysis gasification generator of the upper half of the above-mentioned furnace body 15 only sucks and circulates the biomass gas of the upper half of the above-mentioned furnace body 15. At the same time, the biomass gas in the upper half will also slowly flow to the lower half of the above-mentioned furnace body 15 under the action of gravity, so that the biomass gas in the above-mentioned furnace body 15 can be purified, and the biomass gas near the bottom of the above-mentioned furnace body 15 contains less wood tar. As an optimization, the side wall of the above-mentioned furnace body 15 is provided with an exhaust pipe 29, the above-mentioned exhaust pipe 29 is located below all the above-mentioned pyrolysis gasification generators, and the biomass gas with a wood tar concentration meeting the standard can be sucked out during the production process and directly used for industrial production without a complex wood tar post-processing process.

[0038] As an optimization, the above-mentioned embodiment also comprises an inclined baffle 24, the above-mentioned inclined baffle 24 is arranged above each of the above-mentioned air inlet holes 20, and the above-mentioned inclined baffle 24 makes the biomass gas in the region between two adjacent above-mentioned pyrolysis gasification generators form a small circulation, and also facilitates the downward movement of the biomass material, charcoal and activated carbon after reaction.

[0039] In the embodiment, as shown in the drawings, a rotating chain ring 25 and an iron anchor 26 are further included, the above-mentioned rotating chain ring 25 is arranged in the above-mentioned furnace body 15, at least two above-mentioned iron anchors 26 are hung on the above-mentioned rotating chain ring 25, the above-mentioned rotating chain ring 25 is driven to rotate by a motor, and the above-mentioned iron anchor 26 moves horizontally in a circle, thereby smoothing the surface of the material. Figure 2 ​

[0040] Compared with the prior art, the wood tar gasification rate is fast, the wood tar cracking and catalytic cracking are carried out in the cracking gasification generator in the furnace, the depth of the reaction is more easily controlled, the wood tar is more completely decomposed, the wood tar content of the biomass gas discharged from the furnace is low, the production needs can be met without complex post-purification treatment, the solid product after the material reaction is equivalent to the external heating dry distillation product, the carbonization-activation process can be realized without providing a gasification agent (such as superheated steam) from the outside, according to different operation parameters, the solid product is a carbon-based fertilizer or biomass charcoal or activated carbon, the yield of the activated carbon is higher, compared with the fluidized bed, the heavy medium heat accumulation is needed to maintain the stable furnace temperature, and a large amount of power energy is needed to consume in the fluidized state, only a small amount of fluidization power energy is consumed in the furnace, and under the condition of the same furnace bottom area, the gasification intensity is much higher than that of various fixed beds.

[0041] The above is only a specific implementation manner of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A cracking gas generator characterized by: The application relates to a pyrolysis gasification generator, which comprises a ring-shaped tube (1) provided with a biomass gas inlet (2), a high-temperature gas inlet (3) and a gas distribution hole (4), a heat exchange cavity (5) and a mixing cavity (6) are arranged in the ring-shaped tube (1), a flow guide heat exchange channel (9) and a heating channel (7) are arranged in the heat exchange cavity (5), one end of the flow guide heat exchange channel (9) is communicated with the biomass gas inlet (2) and the other end is communicated with the mixing cavity (6), one end of the heating channel (7) is communicated with the high-temperature gas inlet (3) and the other end is communicated with the mixing cavity (6), and the gas distribution hole (4) is arranged on the cavity wall of the mixing cavity (6).

2. A cracking gas generator according to claim 1, characterized in that: The pyrolysis gasification generator further comprises a flow guide pipe (10) and a center pipe (11), end plates (12) and ring plates (13) are arranged in the ring-shaped tube (1) at intervals, the ring-shaped tube (1) is divided into the heat exchange cavity (5) and the mixing cavity (6) by the end plates (12) and the ring plates (13), the flow guide pipe (10) and the center pipe (11) are arranged in the heat exchange cavity (5), one end of the center pipe (11) is fixedly connected with the end plate (12) and the other end is communicated with the mixing cavity (6), one end of the flow guide pipe (10) is fixedly connected with the ring plate (13) and the other end is sleeved outside the center pipe (11), the flow guide heat exchange channel (9) comprises a flow guide channel (8) and a heat exchange channel (9), the flow guide channel (8) is between the flow guide pipe (10) and the ring-shaped tube (1), the heat exchange channel (9) is between the flow guide pipe (10) and the center pipe (11), and the center pipe (11) is provided with the heating channel (7).

3. A cracking gas generator according to claim 2, wherein: The center pipe (11) comprises a light pipe and a fish scale hole pipe (14), the light pipe and the fish scale hole pipe (14) are integrated structural members, one end of the light pipe is fixedly connected with the end plate (12), and the other end of the light pipe is connected with the fish scale hole pipe (14).

4. A cracking gas generator according to claim 2, wherein: The flow guide pipe (10) is a structural member made of high-temperature resistant composite material.

5. A cracking gas generator according to claim 2, wherein: The ring-shaped tube (1) is a structural member made of heat-resistant steel.

6. A biomass gasifier characterized by: The application further relates to a pyrolysis gasification system, which comprises a furnace body (15), a circulating air device and the pyrolysis gasification generator as claimed in any one of claims 1-5, a plurality of ring-shaped tubes (1) of the pyrolysis gasification generator are arranged in parallel and at intervals in the furnace body (15), an air inlet of the circulating air device is communicated with a furnace cavity of the furnace body (15), an air outlet of the circulating air device is communicated with the biomass gas inlet (2) of the ring-shaped tube (1), a furnace wall of the furnace body (15) is provided with a plurality of air holes (16), one end of the air hole (16) is communicated with the high-temperature gas inlet (3) of the ring-shaped tube (1) at a corresponding position, and the other end of the air hole (16) is communicated with an external burner.

7. A biomass gasifier according to claim 6, characterized in that: The circulating air device comprises a suction pipe and a plurality of circulating air fans (19), the suction pipe is vertically arranged in the center of the furnace body (15), the pipe wall of the suction pipe is provided with a plurality of air inlet holes (20), the top of the suction pipe is provided with a wind guide pipe, the air inlet of the circulating air fan (19) is communicated with the wind guide pipe, and the air outlet of the circulating air fan (19) is communicated with the biomass gas inlet (2) of the corresponding position of the annular pipe (1).

8. The biomass gasification furnace according to claim 7, characterized in that: The suction pipe comprises an inner pipe (17) and an outer pipe (18), the wind guide pipe comprises an inner wind guide pipe (21) and an outer wind guide pipe (22), the middle part of the outer pipe (18) is provided with an annular baffle (23), the bottom of the inner pipe (17) is fixedly connected with the annular baffle (23), the inner wind guide pipe (21) is communicated with the inner pipe (17), and the outer wind guide pipe (22) is communicated with the outer pipe (18).

9. The biomass gasification furnace according to claim 7, characterized in that: Further comprising an inclined baffle (24), the inclined baffle (24) is arranged above each air inlet hole (20).

10. The biomass gasifier according to claim 7, wherein: Further comprising a rotating chain ring (25) and an iron anchor (26), the rotating chain ring (25) is arranged in the furnace body (15), and at least two iron anchors (26) are hung on the rotating chain ring (25).

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