A carbonization system

Abstract

The present application relates to carbonization equipment technical field, specifically to a kind of carbonization system, the bottom of carbonization furnace is provided with smoke exhaust groove and cracking groove, respectively cover heat exchange plate and heat conducting plate, smoke flue is arranged in the bottom of carbonization furnace, so that the design of downward smoke exhaust can avoid to a certain extent in the carbonization process smoke emission outside. Heat conducting plate is used to the tar in the smoke gas passing in cracking groove for secondary cracking, it is convenient to burn steam power generation device and the combustible material such as cracking tar in water gas and smoke gas is burned to generate electricity, reduce the consumption of external electric energy to burn power generation. And the heat exchange tube passing in heat exchange plate can heat the water in the combustion steam power generation device and vaporization spray pipe, improve the energy utilization of biomass. High-temperature carbon discharged by carbonization furnace is received by cooling stack carbon chamber, and high-temperature water mist is sprayed by vaporization spray pipe, so that water gas can be prepared in addition to cooling high-temperature carbon, and one can achieve two goals.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of carbonization equipment, in particular to a carbonization system. BACKGROUND

[0002] At present, after the completion of the harvest of crops, such as sugarcane and rice planting, the residues formed after harvesting are mostly treated by on-site incineration, but on-site incineration can easily produce a large amount of smoke and dust, pollute the environment, and also cause a lot of waste, and the energy in the biomass cannot be recycled. In addition to the above-mentioned treatment method, the more economical treatment method at present is crushing and returning to the field and centralized incineration treatment. Although the crushing and returning to the field is simple to operate, the crushed crop branches are directly sprayed in the farmland without composting treatment, which can easily change the soil properties and form a layer of incompletely decomposed humus layer in the soil layer, which can not only affect the normal growth of the next season's crops, but also easily breed bacteria.

[0003] In view of the above situation, the patent with publication number CN112521966A discloses a high-efficiency environmentally friendly multi-kettle mobile plant carbonization furnace, which can convert waste branches, leaves, sawdust, and farmland straw, crop branches and leaves, and residues into biochar, realizing the reuse of solid waste. At the same time, the purification of flue gas and the recycling of water source are completed during the carbonization process, saving resources and preventing air pollution. However, in the patent, the negative pressure machine and the centrifugal water pump need a large amount of electric energy to operate, so when using the carbonization furnace in the wild, it is often necessary to be in the area where the power grid is located or to bring a portable power generation equipment, which limits the use convenience of the whole set of equipment. In the actual treatment process, it takes 5-10 hours to completely carbonize a batch of biomass, and the negative pressure machine and the centrifugal water pump need to be kept running for a long time, so the required electric energy consumption is relatively large, and the carbonization cost increases. In addition, the above-mentioned mobile carbonization system adopts an incomplete combustion method to produce charcoal, and the flue gas is directly purified by the flue gas purification system, which can not fully utilize the combustible substances such as tar, carbon monoxide and hydrogen in the flue gas discharged from the carbonization furnace. The tar will adhere to the flue gas filter and the activated carbon adsorber, causing the flue gas purification system to fail, and the carbon monoxide cannot be oxidized by the double-alkali spray tower, so it is easy to cause a small amount of pollution during the outward discharge process. SUMMARY

[0004] In order to overcome one of the deficiencies of the prior art, the purpose of the present application is to provide a carbonization system, which can effectively recycle the combustible substances in the tail gas discharged during the carbonization process, improve the utilization rate of biomass, and also reduce the power consumption of the carbonization system.

[0005] To solve the above problems, the technical scheme adopted by the present application is as follows:

[0006] A carbonization system, comprising a carbonization furnace, a cooling carbonization chamber, a steam combustion power generation device, a flue gas purification device and a water supply device, a plurality of smoke exhaust grooves are arranged in parallel at the bottom of the carbonization furnace, a cracking groove is arranged between two adjacent smoke exhaust grooves, the side wall of the cracking groove and the side wall of the smoke exhaust groove are communicated through a plurality of smoke exhaust ports, the opening of all the smoke exhaust grooves is covered with a heat exchange plate, a heat exchange pipe is arranged in the heat exchange plate along the length direction of the heat exchange plate, a plurality of smoke passing holes are arranged penetratingly on the heat exchange plate, and a heat conducting plate is arranged on the cracking groove; a smoke exhaust channel is arranged on the carbonization furnace, and one end of the smoke exhaust channel is communicated with all the cracking grooves; a one-way communication carbon discharge port is arranged on one end of the carbonization furnace; the cooling carbonization chamber is arranged at the bottom of the carbonization furnace and one end of the cooling carbonization chamber is communicated with the carbon discharge port, and the top of the cooling carbonization chamber can conduct heat with the bottom of the carbonization furnace; a vaporization spraying pipe is arranged in the cooling carbonization chamber, and the inlet end of the vaporization spraying pipe is communicated with the output end of all the heat exchange pipes; a gas mixing chamber is one-way communicated with the cooling carbonization chamber, the gas mixing chamber is communicated with the smoke exhaust channel, and a gas inlet valve is one-way arranged on the gas mixing chamber; the steam combustion power generation device is communicated with the gas outlet end of the gas mixing chamber; the flue gas purification device is used for sucking and purifying the tail gas discharged by the steam combustion power generation device; the water supply device can exchange heat with the gas inlet end of the flue gas purification device, the output end of the water supply device is communicated with the steam combustion power generation device, all the heat exchange pipes and the flue gas purification device, all the heat exchange pipes supply water to the steam combustion power generation device; a storage battery is arranged in the steam combustion power generation device, the storage battery provides electric energy for the flue gas purification device and the water supply device, and part of the steam generated by the steam combustion power generation device is communicated with the input end of the vaporization spraying pipe.

[0007] Further, the bottom of the cracking groove is higher than the bottom of the smoke exhaust groove, the cross section of the heat conducting plate is U-shaped, the opening of the heat conducting plate is downward and invertedly buckled on the opening of the cracking groove, at least part of the side wall of the heat conducting plate is located outside the opening of the cracking groove or is higher than the top surface of the heat exchange plate, a plurality of fin plates are arranged in the heat conducting plate, all the fin plates are arranged staggered and the lower end abuts against the bottom of the cracking groove.

[0008] Further, one end of part of the fin plates outwardly is provided with a heat conducting rod, the heat conducting rod can move through the bottom of the carbonization furnace and extend into the cooling carbonization chamber.

[0009] Further, part of the side wall of the heat conducting plate is higher than the opening end surface of the cracking groove and can be deformed, the two side outer surfaces of each heat conducting plate abut against the outer surface of the corresponding side of the heat exchange plate on the adjacent side.

[0010] Furthermore, the combustion steam power generation device includes a combustion chamber, a steam generator set, and a boiler located outside the combustion chamber. The feed end of the combustion chamber is connected to the gas outlet end of the mixing chamber, and the exhaust end of the combustion chamber is connected to the flue gas purification device. The outlet ends of all the heat exchange tubes are connected to the boiler in an openable and closable manner. The top of the boiler is connected to a steam storage tank via a pipe. The steam generator set is installed on the pipe. The steam storage tank is also connected to the bottom of the boiler and the vaporization spray pipe via a pipe. A pressure relief valve is installed on the pipe between the steam storage tank and the vaporization spray pipe. The steam generator set is electrically connected to the battery via an electronic regulator.

[0011] Furthermore, the water supply device includes a water tank, a supply pipe, and a supply pump installed on the supply pipe. The water tank is capable of heat exchange with the air inlet of the flue gas purification device. The input end of the supply pipe is connected to the water tank, and the output end of the supply pipe is provided with multiple outlets that are respectively connected to the inlet ends of all the heat exchange tubes, the boiler in the combustion steam power generation device, and the flue gas purification device.

[0012] Furthermore, the flue gas purification device includes a flue gas filter, a water scrubbing tower, a spray tower, a tar filter, a negative pressure fan, and a pressure regulating tower connected in sequence through pipelines. The output end of the water supply device is connected to the water scrubbing tower and the spray tower respectively through a supply pipe. The input end of the flue gas filter is connected to the output end of the flue gas duct. An exhaust chimney is provided at the top of the pressure regulating tower. The drainage ends of the water scrubbing tower and the spray tower are connected to a water circulation purification mechanism, which is connected to the water supply device.

[0013] Furthermore, it also includes a charcoal scraping device, which includes a drive motor, a pair of drive shafts, and a drive chain assembly wound around the pair of drive shafts. The drive motor is electrically connected to the battery. Both drive shafts are rotatably mounted at both ends of the bottom of the carbonization furnace. One end of any drive shaft extends through the furnace wall of the carbonization furnace and is connected to the output end of the drive motor mounted outside the carbonization furnace. The drive chain assembly is provided with several scraper mechanisms, which can push the burning charcoal piled on the heat exchange plate and the heat conduction plate into the charcoal discharge port.

[0014] Furthermore, a clearance opening is provided at the end of the carbonization furnace away from the carbon discharge port. The clearance opening connects to the cooling carbon stack chamber. The two drive shafts are rotatably installed in the clearance opening and the carbon discharge port, respectively. The drive chain assembly includes two parallel drive chains, one of which is wound around the same end of a pair of drive shafts, and the other drive chain is wound around the other end of a pair of drive shafts. Both ends of each scraper mechanism are connected to the two drive chains, respectively. The two drive chains can enclose the area of ​​the carbonization furnace located between the clearance opening and the carbon discharge port, so that the upper layer of the two drive chains passes over the platform formed by the heat exchange plate and the heat conduction plate, and the lower layer of the two drive chains passes through the cooling carbon stack chamber.

[0015] Furthermore, each of the scraper mechanisms includes two mounting seats, a swing shaft, and a movable deflector. The two mounting seats are respectively mounted on both sides of the drive chain assembly. The two ends of the swing shaft are rotatably mounted on the two mounting seats. The swing shaft extends outward along its length and is provided with a main deflector. Each of the two mounting seats has a limiting groove on its opposite side. The two ends of the main deflector extend into the limiting groove at the corresponding end. The movable deflector is provided with a plurality of pins, and the main deflector is provided with a plurality of inserts that cooperate with the pins. The pins can move along the axial direction of the inserts and cannot be pulled out of the inserts. The movable deflector can move away from or overlap with the main deflector along the guiding direction of the inserts.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] This invention provides an improved carbonization system for a carbonization furnace. The furnace features an exhaust trough and a pyrolysis trough at its bottom, each covered by a heat exchange plate and a heat conduction plate. The exhaust trough is located at the bottom of the furnace, and this downward exhaust design helps prevent flue gas from escaping during carbonization. It also allows for an open design, facilitating the loading of residual biomass from crops. The heat conduction plate receives heat from the ignited biomass, which is used to perform secondary pyrolysis on tar and other substances in the flue gas flowing through the pyrolysis trough, facilitating combustion and power generation by a steam generator. Heat exchange tubes running through the heat exchange plate heat the water supplied to the steam generator and the vaporization spray pipes, improving the energy utilization rate of the biomass. A cooling char chamber receives the high-temperature char discharged from the furnace, while the vaporization spray pipes spray high-temperature water mist. This not only cools the high-temperature char but also produces water gas, achieving two benefits at once. The combustion steam power generation device can directly burn combustible substances such as water gas and cracked tar in flue gas to generate electricity. This can provide power for the continuous operation of the flue gas purification device, reducing the consumption of external electrical energy and thus reducing the cost of carbonization. In this application, the heat generated during the carbonization of crop biomass and the substances in the flue gas can be effectively utilized to generate electricity, and carbonization, flue gas purification, and power generation can be carried out simultaneously, achieving multiple benefits.

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention;

[0020] Figure 2 This is a cross-section of the carbonization furnace in an embodiment of the present invention. Figure 1 ;

[0021] Figure 3 This is a cross-section of the carbonization furnace in an embodiment of the present invention. Figure 2 ;

[0022] Figure 4 This is a partial cross-sectional view of the interior of the carbonization furnace in an embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of the connection between the water supply device and the combustion steam power generation device, the flue gas purification device and the heat exchange tube in an embodiment of the present invention.

[0024] Figure 6 This is a partial structural schematic diagram of the flue gas purification device in an embodiment of the present invention;

[0025] Figure 7 This is a cross-section of a carbonization furnace in another embodiment of the present invention. Figure 1 ;

[0026] Figure 8 This is a cross-section of a carbonization furnace in another embodiment of the present invention. Figure 2 ;

[0027] Figure 9 This is a schematic diagram of the scraper mechanism in another embodiment of the present invention.

[0028] Explanation of icon numbers:

[0029] Carbonization furnace 100, flue gas trough 110, pyrolysis tank 120, flue gas outlet 130, heat exchange plate 140, heat exchange tube 141, flue gas passage 142, heat conduction plate 150, fin plate 151, heat conduction rod 152, flue gas duct 160, carbon discharge port 170, clearance port 180.

[0030] Cooling coal stack chamber 200, vaporization spray pipe 210, gas mixing chamber 220, air inlet valve 230, coal outlet 240, heat preservation door 250;

[0031] Combustion steam power generation unit 300, storage battery 310, combustion chamber 320, steam generator set 330, boiler 340, pipeline 350, steam storage tank 360, pressure relief valve 370, electronic regulator 380;

[0032] Flue gas purification device 400, pipeline 410, flue gas filter 420, water scrubbing tower 430, spray tower 440, tar filter 450, negative pressure fan 460, pressure regulating tower 470, exhaust chimney 480;

[0033] Water supply device 500, water tank 510, supply pipe 520, supply pump 530, water circulation and purification mechanism 540;

[0034] The components include a scraping device 600, a drive motor 610, a drive shaft 620, a drive chain 630, a scraper mechanism 640, a mounting base 641, a swing shaft 642, a movable dial plate 643, a main dial plate 644, a limiting groove 645, an insertion post 646, and an insertion cylinder 647. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0036] See Figures 1 to 7This application provides a carbonization system, including a carbonization furnace 100, a cooling coke stacking chamber 200, a combustion steam power generation device 300, a flue gas purification device 400, and a water supply device 500. The bottom of the carbonization furnace 100 is provided with a plurality of exhaust troughs 110 arranged in parallel. A pyrolysis trough 120 is provided between two adjacent exhaust troughs 110. The sidewalls of the pyrolysis troughs 120 and the sidewalls of the exhaust troughs 110 are connected by a plurality of exhaust ports 130. All openings of the exhaust troughs 110 are covered with heat exchange plates 140. The heat exchange plates 140 are provided with [missing information - likely related to a specific type of exhaust system]. A heat exchange tube 141 is provided, and a plurality of smoke passage holes 142 are provided through the heat exchange plate 140. A heat-conducting plate 150 is sealed on the pyrolysis tank 120. A flue duct 160 is provided on the carbonization furnace 100, and the flue duct 160 is connected to one end of all the pyrolysis tanks 120. A one-way carbon discharge port 170 is provided at one end of the carbonization furnace 100. A cooling carbon stacking chamber 200 is located at the bottom of the carbonization furnace 100 and one end is connected to the carbon discharge port 170. The top of the cooling carbon stacking chamber 200 can conduct heat to the bottom of the carbonization furnace 100. The cooling coke pile chamber 200 is equipped with a vaporization spray pipe 210, the inlet end of which is connected to the output end of all the heat exchange tubes 141; the coke pile chamber is unidirectionally connected to a mixing chamber 220, which is connected to the flue gas duct 160, and the mixing chamber 220 is unidirectionally equipped with an air inlet 230; the feed end of the combustion steam power generation device 300 is connected to the outlet end of the mixing chamber 220; the flue gas purification device 400 is used to draw in and purify the exhaust gas discharged from the combustion steam power generation device 300; the water supply device 500 is capable of supplying water to the flue gas duct 160. Heat exchange occurs at the air inlet of the gas purification device 400. The output of the water supply device 500 is connected to all the heat exchange tubes 141, the combustion steam power generation device 300, and the flue gas purification device 400. All the heat exchange tubes 141 supply water to the combustion steam power generation device 300. The combustion steam power generation device 300 is equipped with a storage battery 310, which provides electrical energy to the flue gas purification device 400 and the water supply device 500. Part of the steam generated by the combustion steam power generation device 300 is connected to the input of the vaporization spray pipe 210.

[0037] The combustion steam power generation device 300 can be a conventional boiler-type steam generator set, such as patent CN201610275212.X - A steam boiler system with power generation function and its working method or CN200920065498.4 - A technology in a sintering waste heat power generation system. The flue gas purification device 400 can be a conventional flue gas treatment system, such as using a conventional spray tower structure for purification. Because biomass is burned, the exhaust gas generally only contains particulate matter, tar, carbon monoxide, a small amount of nitrogen oxides, water, etc. Therefore, the entire flue gas treatment system can be relatively simple, and can adopt, for example, patent CN201710579664.1 - A treatment system and process for biomass combustion exhaust gas or CN201911223709.7 - A biomass combustion furnace that can effectively treat tar in exhaust gas.

[0038] Furthermore, since the primary purpose of this application is charcoal production, the top of the carbonization furnace 100 can be open to facilitate the addition of biomass at any time, or it can be closed, with only one air inlet, to ensure incomplete combustion within the carbonization furnace 100. If the top of the carbonization furnace 100 is open, biomass can be continuously piled on top and water can be sprayed, which also ensures incomplete combustion at the bottom of the carbonization furnace 100, thereby guaranteeing the charcoal production effect. The above two configurations can be selected according to actual needs. In this application, an open top configuration for the carbonization furnace 100 is preferred, as it facilitates continuous biomass charcoal production in the field and allows for the addition of biomass by external equipment.

[0039] It should be noted that, since the carbonization is to be carried out in the field in this application, the carbonization furnace 100 and the cooling carbon stack chamber 200 can be integrated into one unit, while the combustion steam power generation device 300, the flue gas purification device 400 and the water supply device 500 can be integrated into separate modules. They can be connected by a connection structure. In particular, the pipeline structure for supplying water from the water supply device 500 to the combustion steam power generation device 300 and the flue gas purification device 400 can be connected by a joint flange. The combustion steam power generation device 300 and the mixing chamber 220, and the combustion steam power generation device 300 and the flue gas purification device 400 can also be connected by a connecting flange, which facilitates rapid assembly in the field and facilitates disassembly and transportation later.

[0040] This carbonization system improves the carbonization furnace 100 by installing a flue gas trough 110 and a pyrolysis tank 120 at the bottom of the furnace 100, and covering the heat exchange plate 140 and heat conduction plate 150 respectively. The flue gas duct 160 is located at the bottom of the furnace 100. This downward flue gas design can, to some extent, prevent the emission of flue gas during the carbonization process, and also allows the furnace 100 to be designed as an open space, facilitating the addition of residual biomass from crops. The heat conduction plate 150 can receive the heat from the ignited biomass for secondary pyrolysis of substances such as tar in the flue gas passing through the pyrolysis tank 120, facilitating combustion and power generation by the combustion steam power generation device 300. The heat exchange tubes 141 passing through the heat exchange plate 140 can heat the water supplied to the combustion steam power generation device 300 and the vaporization spray pipe 210, improving the energy utilization rate of biomass. The cooling coke chamber 200 receives the high-temperature char discharged from the carbonization furnace 100, while simultaneously spraying high-temperature water mist through the vaporization spray pipe 210. This not only cools the high-temperature char but also produces water gas, achieving two goals at once. The combustion steam power generation device 300 can directly burn water gas and combustible substances such as cracked tar in the flue gas to generate electricity. This provides power for the continuous operation of the flue gas purification device 400, reducing the consumption of external electrical energy and thus lowering the cost of carbonization. In this application, the heat generated during the biomass carbonization of crops and the substances in the flue gas can be effectively utilized to generate electricity, simultaneously performing carbonization, flue gas purification, and power generation operations, achieving multiple benefits.

[0041] See Figure 2 and Figure 4 The carbonization furnace 100 features a box-like structure design, facilitating hoisting and construction. Its inner walls are lined with refractory bricks. The furnace 100 and the cooling coal stacking chamber 200 are integrated, therefore the inner walls of the cooling coal stacking chamber 200 are also lined with refractory bricks. The two are separated by thermally conductive plates or structures, such as carbon bricks or silicon carbide bricks. These materials, in addition to being wear-resistant, also possess high strength at high temperatures, a low coefficient of thermal expansion, high thermal conductivity, and strong resistance to thermal shock. Their high thermal conductivity helps transfer some of the heat from the furnace 100 to the cooling coal stacking chamber 200, ensuring the heat required for the reaction between the high-temperature carbon and steam within the cooling coal stacking chamber 200. The aforementioned pyrolysis tank 120 and flue gas duct 110 are both mounted on the aforementioned thermally conductive plates or structures. The pyrolysis tank 120 and flue gas duct 110 can be constructed using thermally conductive refractory masonry.

[0042] In the improved embodiment described above, to facilitate the cracking of tar in the flue gas, the bottom of the cracking tank 120 is higher than the bottom of the flue gas trough 110. The heat-conducting plate 150 has a U-shaped cross-section, with its opening facing downwards and inverted over the opening of the cracking tank 120. This arrangement allows the incompletely burned biomass at the bottom of the carbonization furnace 100 to effectively heat the three sides of the bottom of the entire heat-conducting plate 150. This facilitates the high-temperature cracking of tar passing through the flue gas channel formed by the cracking tank 120 and the heat-conducting plate 150. The substances obtained after high-temperature cracking of tar are mainly light aromatics, hydrogen, carbon monoxide, and methane. Light aromatics include benzene, toluene, ethylbenzene, xylene, and naphthalene, all of which are combustible. Therefore, most of the gas in the flue gas channel formed by the cracking tank 120 and the heat-conducting plate 150 is combustible. This facilitates the complete combustion of these flue gases by the combustion steam power generation device 300, thereby achieving flue gas purification and energy recovery. Furthermore, to facilitate heating of the heat-conducting plate 150 by the burning biomass, at least a portion of the sidewall of the heat-conducting plate 150 is located outside the opening of the pyrolysis tank 120 or above the top surface of the heat exchange plate 140. Additionally, to better heat the gas flowing through the flue gas passage formed by the pyrolysis tank 120 and the heat-conducting plate 150, the heat-conducting plate 150 is provided with several fins 151. All the fins 151 are staggered and their lower ends abut against the bottom of the pyrolysis tank 120. This arrangement allows the fins 151 to support the entire heat-conducting plate 150, which is made of conventional steel plate. In this embodiment, the heat-conducting plate 150's strength decreases after heating while simultaneously accumulating the weight of the biomass; therefore, the fins 151 are designed to prevent the heat-conducting plate 150 from deforming under pressure during heating. Meanwhile, the fin 151 can also slow down the flow rate of the gas passing through the flue gas channel formed by the pyrolysis tank 120 and the heat-conducting plate 150, increasing its residence time to ensure that the tar in the flue gas can be fully decomposed. In addition, the fin 151 can also heat the gas passing through the middle of the flue gas channel formed by the pyrolysis tank 120 and the heat-conducting plate 150, ensuring that the gas is heated evenly and reaches the temperature required for its decomposition process. This structural design achieves three benefits at once.

[0043] To facilitate installation and fixation, mounting positions are provided on both sides of the opening of the pyrolysis tank 120, so that the two sides of the opening of the heat conduction plate 150 can be snapped into the mounting positions. At the same time, the two sides of the opening of the heat conduction plate 150 also form an overlapping structure to facilitate cooperation with the mounting positions.

[0044] See Figure 2 and Figure 4In one embodiment of this application, in order to better transfer heat to the cooling coke chamber 200 and ensure the temperature required for the high-temperature carbon in the cooling coke chamber 200 to react with water vapor, a heat-conducting rod 152 is provided on the outward end of a portion of the fins 151. The heat-conducting rod 152 can move through the bottom of the carbonization furnace 100 and extend into the cooling coke chamber 200. The portion of the heat-conducting rod 152 located inside the cooling coke chamber 200 can be designed as a conventional fin structure. The lower end of the heat-conducting rod 152 is located at the top of the cooling coke chamber 200, which can both heat the top of the cooling coke chamber 200 and adapt to the water mist sprayed from the vaporization spray pipe 210, ensuring that the high-temperature carbon in the cooling coke chamber 200 reacts with the water mist or steam. In addition, the heat-conducting rod 152 can also fix the heat-conducting plate 150 to the pyrolysis tank 120, achieving two functions at once.

[0045] In the above embodiments, since both the heat-conducting plate 150 and the heat exchange plate 140 are subject to heat deformation, in order to prevent the heat-conducting plate 150 and the heat exchange plate 140 from deforming and squeezing each other and lifting up during continuous high-temperature baking, the portion of the side walls of the heat-conducting plate 150 that protrudes above the opening end face of the pyrolysis tank 120 is deformable. The outer sides of each heat-conducting plate 150 abut against the outer side of the corresponding side of the heat exchange plate 140 on the adjacent side. This design ensures that even if the heat exchange plate 140 deforms, the heat-conducting plate 150 between the two heat exchange plates 140 will not be squeezed up, thus ensuring the integrity of the flue gas channel formed by the pyrolysis tank 120 and the heat-conducting plate 150 and avoiding affecting the pyrolysis efficiency of tar in the flue gas.

[0046] See Figure 2 and Figure 3 To facilitate the later removal of charcoal from the cooling charcoal chamber 200, in one embodiment of this application, a closable charcoal outlet 240 is provided at the end of the cooling charcoal chamber 200 away from the charcoal outlet 170. A heat-insulating door 250 is provided on the charcoal outlet 240, which is normally closed. Furthermore, to facilitate charcoal removal, the bottom of the cooling charcoal chamber 200 is inclined, meaning the height of the charcoal outlet 240 end is lower than the height of the charcoal outlet 170 end, allowing burning charcoal falling from the charcoal outlet 170 to naturally roll down towards the charcoal outlet 240 end.

[0047] In an improved embodiment, to facilitate rapid cooling of the high-temperature char within the cooling char chamber 200, a water inlet pipe is installed at the bottom of the cooling char chamber 200. This water inlet pipe is connected to a water supply device 500, allowing for rapid cooling of the high-temperature char after the biomass processing is complete. It should be noted that the cooling char chamber 200 will only undergo concentrated rapid cooling after the entire biomass reaction is complete; otherwise, the efficiency of the reaction between the high-temperature char and water vapor within the cooling char chamber 200 and the normal progress of the entire reaction will be affected.

[0048] See Figure 1 As shown in Figure 5, in order to better generate electricity and eliminate combustible substances in flue gas, in one embodiment of this application, the combustion steam power generation device 300 includes a combustion chamber 320, a steam generator set 330, and a boiler 340 disposed outside the combustion chamber 320. The feed end of the combustion chamber 320 is connected to the gas outlet end of the mixing chamber 220, and the exhaust end of the combustion chamber 320 is connected to the flue gas purification device 400. The outlet ends of all the heat exchange tubes 141 are connected to the boiler 340 and can be opened. The boiler 340 is connected to the top of the boiler 340 via a pipe 350 to a steam storage tank 360. The steam generator set 330 is mounted on the pipe 350. The steam storage tank 360 is also connected to the bottom of the boiler 340 and the vaporization spray pipe 210 via a pipe 350. A pressure relief valve 370 is installed on the pipe 350 between the steam storage tank 360 and the vaporization spray pipe 210. The steam generator set 330 is electrically connected to the battery 310 via an electronic regulator 380.

[0049] The steam generator set 330 has a conventional structure, which will not be detailed here. In fact, the pipe 350, steam storage tank 360, and boiler 340 form a closed-loop pipeline. This pipeline constitutes the simplest steam power generation pipeline, which is convenient for personnel to move and assemble in the field. The water in the heat exchange tube 141 is heated by the high-temperature carbon at the bottom of the carbonization furnace 100. This prevents a rapid drop in temperature inside the boiler 340 when water is added, ensuring the normal operation of the entire combustion steam power generation device 300. All outlet ends of the heat exchange tubes 141 are unidirectionally connected to the boiler 340. This prevents the high pressure inside the boiler 340 from flowing backwards along the heat exchange tubes 141. The valve between the boiler 340 and the heat exchange tubes 141 is only opened when the water supply device 500 automatically adds water to the boiler 340.

[0050] The steam storage tank 360 can actually be cooled by external heat exchange, such as water cooling or direct air cooling, which facilitates the cooling of the low-temperature steam into condensate that flows back into the boiler 340. Simultaneously, the steam in the steam storage tank 360 can also be supplied to the vaporization spray pipe 210. This configuration ensures that the high-temperature steam in the steam storage tank 360 can react with the high-temperature carbon and water vapor in the cooling coke chamber 200 to form water gas, achieving pressure relief and recovering the depressurized steam. It should be noted that the high-temperature steam in the steam storage tank 360 is mainly used to drive the steam generator set 330 for power generation. Only when the preset pressure is exceeded will the high-temperature steam in the steam storage tank 360 supply depressurized steam to the vaporization spray pipe 210 through the pressure relief valve 370.

[0051] In addition, a connecting nozzle 321 is provided at one end of the combustion chamber 320, wherein the air inlet end of the connecting nozzle 321 is connected to the mixing chamber 220, and the other end is placed inside the combustion chamber 320. At the same time, an igniter is provided inside the combustion chamber 320, which is located on the periphery of the outlet end of the connecting nozzle 321, so as to facilitate the user to ignite the gas entering the combustion chamber 320.

[0052] It should be noted that in this application, the water supply device 500 is located at the exhaust end of the steam generator set 330, which is actually located in the area between the combustion chamber 320 and the flue gas purification device 400. This allows the exhaust gas to preheat the water supply device 500, ensuring that the boiler temperature will not drop too quickly when it replenishes water to the boiler 340 later, thus ensuring the operational stability of the entire power generation system.

[0053] See Figure 1 , Figure 5 and Figure 6 Furthermore, in this application, to facilitate exhaust gas treatment, the flue gas purification device 400 includes a flue gas filter 420, a water scrubbing tower 430, a spray tower 440, a tar filter 450, a negative pressure fan 460, and a pressure regulating tower 470 connected sequentially through a pipeline 410. The output end of the water supply device 500 is connected to the water scrubbing tower 430 and the spray tower 440 respectively through a supply pipe 520. The input end of the flue gas filter 420 is connected to the output end of the exhaust duct 160. An exhaust chimney 480 is provided on the top of the pressure regulating tower 470. The drain ends of the water scrubbing tower 430 and the spray tower 440 are connected to a water circulation purification mechanism 540, which is connected to the water supply device 500.

[0054] The flue gas filter 420 is equipped with a filter screen, primarily to filter out soot from the flue gas, preventing excessive soot from entering the washing tower 430 and spray tower 440, which could lead to sludge buildup and affect their operation. The tar filter 450 has a conventional structure and will not be detailed here. Its purpose is to prevent residual tar from remaining in the gas burned in the combustion chamber 320. In fact, during normal combustion, the combustible substances in the gas discharged from the mixing chamber 210 are largely burned, so the tar filter 450 may not be required in some embodiments. The washing tower 430 is essentially a water tower structure. Flue gas enters from the bottom and exits from the top. The washing tower 430 is filled with water. As the flue gas passes through the washing tower 430, dust in the flue gas is absorbed by the water, thus removing most of the dust. The spray tower 440 uses water mist spraying to maximize dust removal. The main function of the pressure regulating tower 470 is to stabilize the internal pressure of the entire flue gas purification device 20 and ensure the normal treatment of flue gas.

[0055] To facilitate subsequent handling, connecting flanges are provided on the pipelines 410 between the flue gas filter 420 and the water washing tower 430, between the water washing tower 430 and the spray tower 440, and between the spray tower 440 and the tar filter 450. This structural design is mainly for easy disassembly, handling, and transfer, and for subsequent quick reconnection. Of course, in some embodiments, to reduce the number of connecting flanges, connecting flanges can be provided on the pipelines 410 between the flue gas filter 420 and the water washing tower 430, and between the spray tower 440 and the tar filter 450.

[0056] It should be noted that the actual size of this carbonization system can be designed in different sizes to suit different needs and to adapt to different biomass processing speeds. For example, for ease of transportation, the entire flue gas purification device 400 can be integrated on a single mounting base, or it can be designed in separate parts with different structures connected to each other via connecting flanges. This facilitates disassembly and assembly later. Alternatively, it can be integrated on a single mounting base and then lifted directly by a truck crane for easy transport.

[0057] See Figure 1 In this application, for the purpose of facilitating water supply, the water supply device 500 includes a water tank 510, a supply pipe 520, and a supply pump 530 installed on the supply pipe 520. The water tank 510 is capable of heat exchange with the air inlet of the flue gas purification device 400. The input end of the supply pipe 520 is connected to the water tank 510, and the output end of the supply pipe 520 is provided with multiple outlets that are respectively connected to the inlet ends of all the heat exchange tubes 141, the boiler 340 in the combustion steam power generation device 300, and the flue gas purification device 400.

[0058] The water tank 510 is designed separately for easy handling and relocation. The connections between the supply pipe 520 and the water tank 510, supply pump 530, heat exchange pipe 141, boiler 340, water washing tower 430, and spray tower 440 are all made via quick-release couplings, facilitating disassembly and assembly. It should be noted that the inlet ends of all heat exchange pipes 141 are connected to the same water distribution pipe, and the supply pipe 520 can be directly connected to the water distribution pipe via a coupling, facilitating disassembly and assembly. The output end of the water circulation purification mechanism 540 is connected to the water tank 510, facilitating the recycling of wastewater discharged from the water washing tower 430 and spray tower 440. In some embodiments, the water circulation purification mechanism 540 can also independently circulate water to the water washing tower 430 and spray tower 440, avoiding the need for further purification of wastewater from the water washing tower 430 and spray tower 440 before entering the water tank 510. In this embodiment, the water tank 510 is connected to the water circulation purification mechanism 540 via a pipeline for water replenishment. In this application, the water circulation purification mechanism 540 can be a conventional water purification mechanism, such as the technical solutions in patent CN202323462354.1 - a sewage treatment filtration and purification device or CN202210187521.7 - a storage-type industrial sewage purification water filter and its implementation method, which will not be described in detail here.

[0059] In the actual charcoal-making process, as the continuously formed charcoal accumulates at the bottom of the carbonization furnace 100, it is possible to wait until the entire furnace of charcoal has been burned before opening the charcoal discharge port 170 and manually using tools to send the high-temperature charcoal into the cooling charcoal storage chamber 200. This operation is relatively cumbersome and carries certain risks. Therefore, in some embodiments, a grate structure can be provided at the bottom of the carbonization furnace 100, using a rolling grate to send the high-temperature charcoal into the charcoal discharge port 170; alternatively, a push plate can be provided at the end of the carbonization furnace 100 away from the charcoal discharge port 170, with a push rod on the push plate extending through the side wall of the carbonization furnace 100. Workers can manually push the push rod, using the push plate to push the lower layer of high-temperature charcoal into the charcoal discharge port 170.

[0060] See Figures 7 to 9In another embodiment of this application, to facilitate continuous char removal, the carbonization system further includes a char scraping device 600. The char scraping device 600 includes a drive motor 610, a pair of drive shafts 620, and a drive chain assembly wound around the pair of drive shafts 620. The drive motor 610 is electrically connected to the battery 310. Both drive shafts 620 are rotatably mounted at both ends of the bottom of the carbonization furnace 100. One end of any drive shaft 620 extends through the furnace wall of the carbonization furnace 100 and connects to the output end of the drive motor 610 mounted outside the carbonization furnace 100. The drive chain assembly is equipped with several scraper mechanisms 640, which can push the burning char piled on the heat exchange plate 140 and the heat conducting plate 150 into the char discharge port 170. In effect, the drive chain assembly and the drive shafts 620 constitute a rotatable grate structure.

[0061] Furthermore, considering the structural design in this application, a cooling coal stacking chamber 200 is also provided at the bottom of the carbonization furnace 100. Therefore, if the high-temperature coal in the carbonization furnace 100 is conventionally discharged directly into the coal discharge port 170, this structural design easily causes the high-temperature coal to accumulate at the end of the cooling coal stacking chamber 200 near the coal discharge port 170. This directly affects the subsequent normal coal discharge and the cleaning of coal from the cooling coal stacking chamber 200. Therefore, in one embodiment of this application, a grate structure can be provided at the bottom of the cooling coal stacking chamber 200 for active coal feeding. However, this is costly, and the cooling coal stacking chamber 200 is relatively short, making it impractical; manual coal removal is preferable. Alternatively, the bottom of the cooling coal stacking chamber 200 can be inclined, with the end near the coal discharge port 240 being lower, utilizing the slope for natural coal discharge. While these methods can all discharge coal, they do not meet the requirements of this application for a suitable outdoor and low-cost setup.

[0062] See Figure 8Therefore, in an improved embodiment of this application, a clearance opening 180 is provided on the end of the carbonization furnace 100 away from the carbon discharge port 170. The clearance opening 180 communicates with the cooling carbon stacking chamber 200. The two drive shafts 620 are rotatably installed in the clearance opening 180 and the carbon discharge port 170, respectively. The drive chain assembly includes two parallel drive chains 630, one of which is wound around the same end of the pair of drive shafts 620, and the other drive chain 630... The scraper mechanism 640 is mounted on the other end of the pair of drive shafts 620. Both ends of each scraper mechanism 640 are connected to two drive chains 630. The two drive chains 630 can enclose the area of ​​the carbonization furnace 100 between the avoidance port 180 and the carbon discharge port 170, so that the upper layer of the two drive chains 630 passes over the platform formed by the heat exchange plate 140 and the heat conduction plate 150, and the lower layer of the two drive chains 630 passes through the cooling carbon stacking chamber 200. This arrangement can achieve carbon discharge from the bottom of the carbonization furnace 100, loosen the high-temperature carbon at the bottom of the carbonization furnace, ensure the normal smoke discharge operation of the smoke outlet 142, and use the lower part of the two drive chains 630 to level and push the excessively high-temperature carbon piled up in the carbon discharge port 170 and the cooling carbon stacking chamber 200 near the carbon discharge port 170 to the end of the carbon outlet 240. This arrangement achieves three benefits at once.

[0063] See Figure 8 Furthermore, since the drive chain 630 and scraper mechanism 640 located above the platform formed by the heat exchange plate 140 and the heat conduction plate 150 are directly heated by the burning biomass, when they rotate into the cooling coke chamber 200, these heated drive chains 630 and scraper mechanisms 640 can maintain the replenishment of the heat source inside the cooling coke chamber 200, thereby ensuring the heat source required for the reaction of high-temperature coke and high-temperature steam to produce water gas. Therefore, through this design, four benefits are achieved at once, and the overall structure is ingenious.

[0064] Furthermore, under normal conditions, the width of the scraper mechanism 640 matches the horizontal width of the carbon discharge port 170 and the clearance port 180. This design ensures that the scraper mechanism 640 blocks the carbon discharge port 170 and the clearance port 180, achieving relative isolation between the cooling carbon stack chamber 200 and the carbonization furnace 100, thus preventing backfire. It should be noted that in this embodiment, regardless of whether the entire drive chain assembly is rotating or stationary, at least one scraper mechanism 640 is always positioned within the carbon discharge port 170 and the clearance port 180. This prevents the cooling carbon stack chamber 200 and the carbonization furnace 100 from being unable to communicate directly.

[0065] See Figure 9In an improved embodiment of this application, in order to reduce the resistance of scraping the high-temperature carbon and to properly scrape the high-temperature carbon on the carbonization furnace 100 into the carbon discharge port 170, while also scraping as much high-temperature carbon as possible in the cooling carbon stacking chamber 200 to avoid the high-temperature carbon in the area below the carbon discharge port 170 being piled up too high, each scraper mechanism 640 includes two mounting seats 641, a swing shaft 642, and a movable lever 643. The two mounting seats 641 are respectively mounted on both sides of the drive chain assembly, which are actually respectively mounted on two drive chains 630; the two ends of the swing shaft 642 are rotatably mounted on the two mounting seats 641. On the mounting base 641, the swing shaft 642 extends outward along its length and is provided with a main dial plate 644. Each of the two mounting bases 641 has a limiting groove 645 on one side facing each other. The two ends of the main dial plate 644 extend into the limiting groove 645 at the corresponding end. The movable dial plate 643 is provided with a plurality of inserts 646. The main dial plate 644 is provided with a plurality of inserts 647 that cooperate with the inserts 646. The inserts 646 can move along the axial direction of the inserts 647 and cannot be pulled out from the inserts 647. The movable dial plate 643 can move away from or overlap with the main dial plate 644 along the guiding direction of the inserts 647.

[0066] The design of the swing shaft 642 allows the structure formed by the main lever plate 644 and the movable lever plate 643 to swing appropriately, suitable for the forward and reverse rotation of the entire drive chain assembly. This design is essential because a large amount of biomass is piled up inside the carbonization furnace 100. Although the bottom burns, the biomass in the middle and top does not burn. Moreover, the burning speed of different plant species within the biomass is different. As a result, some of the high-temperature char at the bottom of the carbonization furnace 100 may contain relatively hard materials. If the drive chain assembly rotates normally in the forward direction, these hard high-temperature char will be squeezed together and block the char discharge port 170. At this time, the drive chain assembly needs to rotate in the reverse direction for a certain distance. Repeating this several times can loosen these squeezed char discharge ports 170, effectively preventing the entire drive chain assembly from jamming.

[0067] The structure formed by the main deflector plate 644 and the movable deflector plate 643 can swing back and forth relative to the running direction of the drive chain assembly. This design is largely to adapt to the forward and reverse rotation of the drive chain assembly. Furthermore, the limiting groove 645 mainly limits the swing angle of the structure formed by the main deflector plate 644 and the movable deflector plate 643. When the scraper mechanism 640 runs above the platform formed by the heat exchange plate 140 and the heat conduction plate 150, the movable deflector plate 643, due to its own weight and the squeezing force of the high-temperature carbon, overlaps with the main deflector plate 644. When the scraper mechanism 640 runs into the carbon discharge port 170, the cooling carbon stacking chamber 200, and the clearance port 180, due to the weight of the movable deflector plate 643 and the elimination of most of the squeezing force of the high-temperature carbon, the movable deflector plate 643 droops and gradually extends from the main deflector plate 644. This structural design ensures that each scraper mechanism 640 is located within the carbon discharge port 170, the cooling carbon stacking chamber 200, and the clearance port 180. When the main carbon is within the cooling carbon stack chamber 200 and the clearance port 180, the area of ​​high-temperature carbon scraped by the structure formed by the main deflector plate 644 and the movable deflector plate 643 increases, thereby increasing the carbon scraping capacity of the structure formed by the main deflector plate 644 and the movable deflector plate 643. To a large extent, it can effectively push the high-temperature carbon at the end of the cooling carbon stack chamber 200 located at the carbon discharge port 170 to the end of the clearance port 180. At the same time, it flattens the new high-temperature carbon, which is convenient for it to fully react with the high-temperature steam or high-temperature water mist sprayed by the vaporization spray pipe 210, thereby improving its efficiency in producing water gas. This design achieves two goals at once.

[0068] The above embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A carbonization system, characterized in that, include A carbonization furnace has several exhaust troughs arranged parallel to each other at its bottom. A pyrolysis tank is located between two adjacent exhaust troughs. The sidewalls of the pyrolysis tanks and the sidewalls of the exhaust troughs are connected by several exhaust ports. All openings of the exhaust troughs are covered with heat exchange plates. Heat exchange tubes are arranged along the length of each heat exchange plate, and several smoke passage holes are penetrating through the heat exchange plates. The pyrolysis tank is covered with a heat-conducting plate. The carbonization furnace has an exhaust duct that connects to one end of all the pyrolysis tanks. One end of the carbonization furnace has a one-way carbon discharge port. A cooling char chamber is located at the bottom of the carbonization furnace and one end is connected to the char discharge port. The top of the cooling char chamber can conduct heat to the bottom of the carbonization furnace. A vaporization spray pipe is installed inside the cooling char chamber, and the inlet end of the vaporization spray pipe is connected to the output end of all the heat exchange tubes. The cooling char chamber is unidirectionally connected to a mixing chamber, which is connected to the flue gas duct. A unidirectional air inlet is installed on the mixing chamber. A combustion steam power generation device, wherein the feed end is connected to the gas outlet end of the mixing chamber; A flue gas purification device for drawing in and purifying the exhaust gas emitted by the combustion steam power generation device; A water supply device is provided, which is capable of heat exchange with the air inlet of the flue gas purification device. The output of the water supply device is connected to the combustion steam power generation device, all the heat exchange tubes and the flue gas purification device. All the heat exchange tubes are capable of supplying water to the combustion steam power generation device. The combustion steam power generation device is equipped with a storage battery, which provides power to the flue gas purification device and the water supply device. Part of the steam generated by the combustion steam power generation device is connected to the input end of the vaporization spray pipe.

2. The carbonization system according to claim 1, characterized in that: The bottom of the pyrolysis tank is higher than the bottom of the flue gas trough. The heat-conducting plate has a U-shaped cross-section. The opening of the heat-conducting plate faces downward and is inverted on the opening of the pyrolysis tank. At least a portion of the sidewall of the heat-conducting plate is located outside the opening of the pyrolysis tank or above the top surface of the heat exchange plate. Several fins are provided inside the heat-conducting plate. All the fins are staggered and their lower ends abut against the bottom of the pyrolysis tank.

3. The carbonization system according to claim 2, characterized in that: A heat-conducting rod is provided on one of the outward-facing ends of the fins. The heat-conducting rod can move through the bottom of the carbonization furnace and extend into the cooling coal stack chamber.

4. A carbonization system according to claim 2, characterized in that: The portion of the sidewalls of the heat-conducting plate that extends above the opening of the pyrolysis tank is deformable, and the outer sides of each heat-conducting plate abut against the outer side of the corresponding side of the heat exchange plate on the adjacent side.

5. A carbonization system according to claim 1, characterized in that: The combustion steam power generation device includes a combustion chamber, a steam generator set, and a boiler located outside the combustion chamber. The feed end of the combustion chamber is connected to the gas outlet of the mixing chamber, and the exhaust end of the combustion chamber is connected to the flue gas purification device. The outlet ends of all the heat exchange tubes are connected to the boiler in an openable and closable manner. The top of the boiler is connected to a steam storage tank via a pipe. The steam generator set is installed on the pipe. The steam storage tank is also connected to the bottom of the boiler and a vaporization spray pipe via a pipe. A pressure relief valve is installed on the pipe between the steam storage tank and the vaporization spray pipe. The steam generator set is electrically connected to the battery via an electronic regulator.

6. A carbonization system according to claim 1 or 5, characterized in that: The water supply device includes a water tank, a supply pipe, and a supply pump installed on the supply pipe. The water tank is capable of heat exchange with the air inlet of the flue gas purification device. The input end of the supply pipe is connected to the water tank, and the output end of the supply pipe is provided with multiple outlets that are respectively connected to the inlet ends of all the heat exchange tubes, the boiler in the combustion steam power generation device, and the flue gas purification device.

7. A carbonization system according to claim 1, characterized in that: The flue gas purification device includes a flue gas filter, a water scrubbing tower, a spray tower, a tar filter, a negative pressure fan, and a pressure regulating tower, which are connected in sequence through pipelines. The output end of the water supply device is connected to the water scrubbing tower and the spray tower through a supply pipe. The input end of the flue gas filter is connected to the output end of the flue gas duct. An exhaust chimney is provided on the top of the pressure regulating tower. The drainage ends of the water scrubbing tower and the spray tower are connected to a water circulation purification mechanism, which is connected to the water supply device.

8. A carbonization system according to claim 1, characterized in that: It also includes a carbon scraping device, which includes a drive motor, a pair of drive shafts, and a drive chain assembly wound around the pair of drive shafts. The drive motor is electrically connected to the battery. Both drive shafts are rotatably mounted at both ends of the bottom of the carbonization furnace. One end of each drive shaft extends through the furnace wall of the carbonization furnace and is connected to the output end of the drive motor mounted outside the carbonization furnace. The drive chain assembly is provided with several scraper mechanisms, which can push the burning carbon piled on the heat exchange plate and the heat conduction plate into the carbon discharge port.

9. A carbonization system according to claim 8, characterized in that: The carbonization furnace has a clearance opening at the end away from the carbon discharge port, which connects to the cooling carbon stack chamber. Two drive shafts are rotatably installed in the clearance opening and the carbon discharge port, respectively. The drive chain assembly includes two parallel drive chains, one of which is wound around the same end of a pair of drive shafts, and the other drive chain is wound around the other end of a pair of drive shafts. Both ends of each scraper mechanism are connected to the two drive chains, respectively. The two drive chains can enclose the area of ​​the carbonization furnace between the clearance opening and the carbon discharge port, so that the upper layer of the two drive chains passes over the platform formed by the heat exchange plate and the heat conduction plate, and the lower layer of the two drive chains passes through the cooling carbon stack chamber.

10. A carbonization system according to claim 8 or 9, characterized in that: Each scraper mechanism includes two mounting seats, a swing shaft, and a movable deflector. The two mounting seats are respectively mounted on both sides of the drive chain assembly. The two ends of the swing shaft are rotatably mounted on the two mounting seats. A main deflector is provided on the swing shaft extending outward along its length. A limiting groove is provided on the opposite side of each of the two mounting seats. The two ends of the main deflector extend into the limiting groove at the corresponding end. A plurality of pins are provided on the movable deflector. A plurality of inserts that cooperate with the pins are provided on the main deflector. The pins can move along the axial direction of the inserts and cannot be pulled out of the inserts. The movable deflector can move away from or overlap with the main deflector along the guiding direction of the inserts.

Images