Biomass raw material deep processing system

Abstract

The invention discloses a biomass raw material deep processing system which comprises a water-cooled chain grate, a sealed blanking device, a water-cooled spiral feeder and a gasification furnace body, the sealed blanking device conveys biomass raw materials to the water-cooled spiral feeder, the water-cooled spiral feeder distributes the biomass raw materials on the upper surface of the water-cooled chain grate, and the gasification furnace body is arranged on the upper surface of the water-cooled chain grate. The water-cooled chain grate is used for conveying biomass raw materials, and the gasification furnace body is used for heating and combusting the biomass raw materials to generate biomass gas; the tail end of the water-cooled chain grate stoker is provided with a scraper, a water-cooled crusher, a drum-type slag cooler, a sealed belt conveyor, a collecting hopper, a U-shaped spiral feeder, a pulverizer, a cyclone collector and a rotary vibration sieve, and carbon residues generated after biomass raw materials are combusted and gasified are sequentially processed into carbon powder through the devices. According to the biomass raw material deep processing system, carbon residues are processed into valuable carbon powder, automatic biomass gas and carbon powder co-production is achieved, and the purposes of saving energy, reducing emission and improving environmental protection benefits and economic benefits are achieved.

Description

Technical Field

[0001] This application relates to the field of biomass energy utilization technology, and in particular to a biomass raw material deep processing system. Background Technology

[0002] Biomass gas is produced from agricultural and forestry waste (waste firewood, branches, fruit shells, straw, rice husks, bagasse, edible mushroom residue, livestock manure, etc.) as raw material. Under incomplete combustion conditions, a series of physicochemical reactions, including drying, pyrolysis, oxidation, and reduction, break down the chains of high-molecular-weight organic hydrocarbons into lower-molecular-weight carbon, hydrogen, carbon monoxide, and a small amount of low-molecular-weight hydrocarbons (i.e., biomass gas). Other components include nitrogen, carbon dioxide, moisture, tar, and particulate matter. The low-calorific-value combustible biomass gas produced by gasification can be burned in a burner for heat utilization. This is an effective method for reducing carbon emissions and rationally disposing of biomass waste, saving energy costs while meeting emission requirements.

[0003] The process of producing biomass gas through pyrolysis is as follows: using biomass as raw material, an appropriate amount of air is introduced into the gasifier, using air as the gasifying agent. After a high-temperature reaction (usually 300℃-800℃), the organic matter is volatilely decomposed into gaseous and solid carbonaceous substances. Biomass pyrolysis is a gas production process carried out under high-temperature anaerobic or non-anaerobic conditions. Under thermal action, higher molecular weight organic hydrocarbons decompose to produce lower molecular weight gases, such as hydrogen, carbon monoxide, nitrogen, and carbon dioxide. The high-temperature (around 380℃) biomass gas from pyrolysis gasification is directly extracted and utilized without condensation. The tar is in a gaseous molecular state, which will not clog the gas pipeline, and it solves the problem of difficult tar treatment and improves the calorific value of the gas.

[0004] Currently, there are three methods for utilizing biomass energy. The first is direct combustion, which is traditional but has low thermal efficiency. While the char can be completely burned, nitrogen oxide emissions are difficult to control and fail to meet environmental emission standards. The second is semi-gasification combustion, which is prone to coking in the furnace and burners, requiring frequent shutdowns for treatment. Char cannot be completely burned, and nitrogen oxide emissions are difficult to control and fail to meet environmental emission standards. The third is full gasification combustion, which has high thermal efficiency, easily controls and treats nitrogen oxide emissions to meet environmental emission standards, has a gasification conversion rate of approximately 70%, and a char content of about 30% in the ash. It can operate continuously and stably for extended periods. Most existing biomass gasification furnaces use the third method. However, existing biomass gasification furnaces can only convert and utilize about 70% of the biomass energy. Because the biomass gasification rate is several times to ten times faster than the char combustion rate, the discharged char still contains a significant amount of carbon, resulting in resource waste and increased difficulty in char treatment. Therefore, how to treat the discharged char is a problem that existing biomass gasification furnaces must address. Summary of the Invention

[0005] To address one of the technical problems existing in the prior art, this application provides a biomass raw material deep processing system that, while generating biomass gas, effectively processes the remaining charcoal slag to facilitate subsequent utilization and achieve the goal of improving environmental and economic benefits.

[0006] A biomass raw material deep processing system according to a first aspect of this application includes a water-cooled chain grate, the water-cooled chain grate including a chain web for conveying biomass raw materials and charcoal slag along a first horizontal direction, the lower part of the chain web being provided with a plurality of adjustable ventilation windows; a sealed feeder and a water-cooled screw feeder, the water-cooled screw feeder including a main shaft spanning above the water-cooled chain grate along a second horizontal direction, the second horizontal direction being perpendicular to the first horizontal direction, the main shaft being provided with a screw for pushing biomass raw materials. The sealed feeder is positioned above the water-cooled screw feeder, which conveys biomass feedstock onto the water-cooled screw feeder, which then distributes the biomass feedstock along a second horizontal direction on the upper surface of the chain grate. The gasifier body is positioned above the water-cooled chain grate and is used to heat, combust, and gasify the biomass feedstock conveyed on the chain grate to generate biomass gas. The adjustable ventilation window is located within the range of the gasifier body. Ambient air enters the biomass feedstock on the chain grate through the adjustable ventilation window to aid combustion and provide the heat required for gasification. A gas outlet is located at the top of the gasifier body, and a slag discharge port is located at the rear. The char slag formed after the biomass feedstock is combusted and gasified is discharged from the slag discharge port along a first horizontal direction. The water-cooled chain grate is sequentially equipped with a first scraper conveyor, a water-cooled crusher, a second scraper conveyor, a drum-type slag cooler, a sealed belt conveyor, a hopper, a U-shaped screw feeder, a grinding mill, and a cyclone separator. The collector and vibrating screen are used to collect the char slag formed after the biomass raw material is burned and gasified. The char slag is conveyed by the first scraper conveyor to the water-cooled crusher for crushing to obtain char slag particles. The char slag particles are conveyed by the second scraper conveyor to the drum-type slag cooler for cooling. The cooled char slag particles are then conveyed sequentially through the sealed belt conveyor, the collection hopper and the U-shaped screw feeder into the grinding mill for grinding to obtain char powder. The char powder is collected by the cyclone collector and conveyed to the vibrating screen. The char powder is vibrated and screened in the vibrating screen and then output and bagged.

[0007] According to the biomass raw material deep processing system provided in the first aspect of this application, the biomass raw material deep processing system further includes a dust removal module, the dust removal module including a first ventilation duct, a second ventilation duct, a ceramic multi-tube dust collector and a bag dust collector; ventilation pipes are respectively provided on the first scraper conveyor, the second scraper conveyor and the sealed belt conveyor, the ventilation pipes converge to the first ventilation duct or the second ventilation duct, the first ventilation duct and the second ventilation duct are respectively connected to the ceramic multi-tube dust collector, and the output port of the ceramic multi-tube dust collector is connected to the bag dust collector.

[0008] According to the biomass raw material deep processing system provided in the first aspect of this application, an induced draft fan is provided between the grinding mill and the cyclone collector. The induced draft fan is connected to the grinding mill and the cyclone collector respectively. The induced draft fan provides circulating air to blow the carbon powder in the grinding mill to the cyclone collector for collection.

[0009] According to the biomass raw material deep processing system provided in the first aspect of this application, the sealed belt conveyor is equipped with a magnetic iron remover.

[0010] According to the biomass raw material deep processing system provided in the first aspect of this application, a first gas pipeline, a high-temperature resistant induced draft fan, and a second gas pipeline are sequentially connected to the gas outlet, and a biomass gas burner is provided at the end of the second gas pipeline.

[0011] According to the biomass raw material deep processing system provided in the first aspect of this application, a biomass gas purification device is provided between the gas outlet and the first gas pipeline. When the biomass gas generated by the gasifier body passes through the biomass gas purification device, the biomass gas is purified and dust is separated by the biomass gas purification device.

[0012] According to the biomass raw material deep processing system provided in the first aspect of this application, a shut-off valve and a venting device are provided on the second gas pipeline, and the shut-off valve is located behind the venting device along the direction of gas transportation.

[0013] According to the biomass raw material deep processing system provided in the first aspect of this application, the gasifier body is composed of a water-cooled base, a composite furnace body, and a water-cooled furnace top. The water-cooled base, the composite furnace body, the water-cooled furnace top, and the chain spokes together define the furnace chamber of the gasifier body.

[0014] According to the biomass raw material deep processing system provided in the first aspect of this application, a cooling zone is provided at the rear of the gasifier body, and the carbon slag discharged from the slag discharge port enters the cooling zone for cooling, and a heat recovery device is provided above the cooling zone.

[0015] According to the biomass raw material deep processing system provided in the first aspect of this application, the sealed feeder includes a feed cylinder, an upper valve plate and a lower valve plate are provided inside the feed cylinder, a material retention area is defined between the upper valve plate and the lower valve plate, and the upper valve plate and the lower valve plate work alternately by opening and closing.

[0016] This application has the following beneficial effects:

[0017] The biomass raw material deep processing system provided in this application can meet the requirements of continuous and safe operation of the equipment, and process the difficult-to-use biomass char residue into valuable char powder. It breaks through the problem that traditional biomass gasification cannot continuously process char residue on-site, deepens the utilization of biomass energy, realizes automated production of biomass gas and char powder co-production, and achieves the goals of energy conservation, emission reduction, and improved environmental and economic benefits.

[0018] Other features and advantages of this application will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the application. The objectives and other advantages of this application may be realized and obtained by means of the structures particularly pointed out in the description, claims and drawings. Attached Figure Description

[0019] To more clearly illustrate the technical solution of this application, the following description will be provided in conjunction with the accompanying drawings and embodiments. It should be understood that the following drawings only show some embodiments of this application and should not be considered as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort. In the drawings:

[0020] Figure 1 This is a top view of a biomass raw material deep processing system provided in this application;

[0021] Figure 2 yes Figure 1 Side view of a deep processing system for biomass raw materials;

[0022] Figure 3 yes Figure 1 Front view of a deep processing system for biomass raw materials;

[0023] Figure 4 This is a schematic diagram of a sealed feeder.

[0024] Figure 5 This is a schematic diagram of a water-cooled screw feeder.

[0025] Figure 6 This is a schematic diagram of the gasifier body;

[0026] Figure 7 This is a structural diagram of a water-cooled base;

[0027] Figure 8 This is a side view of the water-cooled base;

[0028] Figure 9 This is a rear view of the water-cooled base;

[0029] Figure 10 This is a schematic diagram of the composite furnace body;

[0030] Figure 11 This is a schematic diagram of the internal cooling water circulation of a water-cooled furnace top;

[0031] Figure 12 This is a schematic diagram of the structure of a water-cooled furnace top;

[0032] Figure 13 This is a schematic diagram of the material level controller;

[0033] Figure 14 This is a structural schematic diagram of the first scraper conveyor;

[0034] Figure 15 This is a structural schematic diagram of the first scraper conveyor housing and its water-cooled body;

[0035] Figure 16 This is a side view of a water-cooled crusher;

[0036] Figure 17 This is a top view of a water-cooled crusher;

[0037] Figure 18 This is a schematic diagram of the water-cooled shaft.

[0038] Figure 19 This is the front view of a drum-type slag cooler;

[0039] Figure 20 This is a schematic diagram of the internal structure of a drum-type slag cooler;

[0040] Figure 21 This is a structural diagram of the material collection hopper to the grinding mill;

[0041] Figure 22 This is a structural diagram of a grinding mill and a cyclone collector;

[0042] Figure 23 This is a schematic diagram of the structure of a vibrating screen;

[0043] Figure 24 This is a schematic diagram of a biomass gas purification device. Detailed Implementation

[0044] The present invention will now be described in further detail with reference to specific embodiments and accompanying drawings. Similar elements in different embodiments are referred to by associated similar element reference numerals. In the following embodiments, many details are described to facilitate a better understanding of this application. However, those skilled in the art will readily recognize that some features may be omitted in different situations, or may be replaced by other elements, materials, or methods. In some cases, certain operations related to this application are not shown or described in the specification. This is to avoid obscuring the core parts of this application with excessive description. For those skilled in the art, detailed description of these related operations is not necessary; they can fully understand the related operations based on the description in the specification and general technical knowledge in the art.

[0045] Furthermore, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments. At the same time, the steps or actions in the method description can be rearranged or adjusted in a manner obvious to those skilled in the art. Therefore, the various orders in the specification and drawings are only for the clear description of a particular embodiment and do not imply a necessary order, unless otherwise stated that a particular order must be followed.

[0046] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages).

[0047] Reference Figures 1 to 24This application provides a biomass raw material deep processing system, including a water-cooled chain grate 4, the water-cooled chain grate 4 including a chain web 404 for conveying biomass raw materials and charcoal slag along a first horizontal direction, and a plurality of adjustable ventilation windows 401 provided at the lower part of the chain web 404; a sealed feeder 1 and a water-cooled screw feeder 2, the water-cooled screw feeder 2 including a main shaft 201 spanning above the water-cooled chain grate 4 along a second horizontal direction, the second horizontal direction being perpendicular to the first horizontal direction, and the main shaft 201 being provided with screw blades 203 for pushing biomass raw materials. A sealed feeder 1 is positioned above a water-cooled screw feeder 2. The sealed feeder 1 conveys biomass feedstock to the water-cooled screw feeder 2, which then distributes the biomass feedstock along the second horizontal direction onto the upper surface of the chain grate 404. A gasifier body 3 is positioned above a water-cooled chain grate 4. The gasifier body 3 heats and burns the biomass feedstock conveyed on the chain grate 404 to generate biomass gas. An adjustable ventilation window 401 is located within the gasifier body 3, allowing outside air to enter the biomass feedstock on the chain grate 404 to aid combustion. A gas outlet 6 is located at the top of the gasifier body 3, and a slag discharge port 305 is located at the rear. The char formed after the biomass feedstock is burned and gasified flows out from the slag discharge port 305 along the first horizontal direction. 5. Discharge; Among them, the water-cooled chain grate 4 is sequentially equipped with a first scraper 8, a water-cooled crusher 9, a second scraper 10, a drum-type slag cooler 11, a sealed belt conveyor 12, a collection hopper 14, a U-shaped screw feeder 15, a grinding mill 16, a cyclone collector 18, and a vibrating screen 19. The char slag formed after the biomass raw material is burned and gasified is conveyed by the first scraper 8 to the water-cooled crusher 9 for crushing to obtain char slag particles. The char slag particles are conveyed by the second scraper 10 to the drum-type slag cooler 11 for cooling. The cooled char slag particles are sequentially conveyed by the sealed belt conveyor 12, the collection hopper 14, and the U-shaped screw feeder 15 into the grinding mill 16 to be ground to obtain char powder. The char powder is collected by the cyclone collector 18 and conveyed to the vibrating screen 19. The char powder is vibrated and screened in the vibrating screen 19 and then output and bagged. The biomass raw material deep processing system provided in this application can meet the requirements of continuous and safe operation of the equipment, and process the difficult-to-use biomass char residue into valuable char powder. It breaks through the problem that traditional biomass gasification cannot continuously process char residue on-site, deepens the utilization of biomass energy, realizes automated production of biomass gas and char powder co-production, and achieves the goals of energy conservation, emission reduction, and improved environmental and economic benefits.

[0048] Furthermore, the biomass raw material deep processing system also includes a dust removal module, which comprises a first ventilation duct 21, a second ventilation duct 22, a ceramic multi-tube dust collector 23, and a bag filter 24. Ventilation pipes 807 are respectively installed on the first scraper conveyor 8, the second scraper conveyor 10, and the sealed belt conveyor 12. These ventilation pipes 807 converge at either the first ventilation duct 21 or the second ventilation duct 22. The first and second ventilation ducts 21 and 22 are respectively connected to the inlet of the ceramic multi-tube dust collector 23, and the outlet of the ceramic multi-tube dust collector 23 is connected to the bag filter 24. Carbon dust emitted from various devices is collected through the first and second ventilation ducts 21 and 22 to prevent it from flying in the environment. The collected carbon dust is transported to the ceramic multi-tube dust collector 23 for preliminary dust removal, and finally, after filtration by the bag filter 24, clean air is discharged.

[0049] Furthermore, an induced draft fan 17 is provided between the grinding mill 16 and the cyclone collector 18. The induced draft fan 17 is connected to the grinding mill 16 and the cyclone collector 18 respectively. The induced draft fan 17 provides circulating air to blow the carbon powder in the grinding mill 16 to the cyclone collector 18 for collection. The circulation of air between the grinding mill 16 and the cyclone collector 18 is realized through the induced draft fan 17.

[0050] Furthermore, a magnetic separator 13 is installed on the sealed belt conveyor 12. The magnetic separator 13 is used to remove metal objects from the carbon slag particles conveyed on the sealed belt conveyor 12, so as to avoid damaging the grinding mill 16 and recover valuable metals.

[0051] Furthermore, a first gas pipeline 26, a high-temperature induced draft fan 27, and a second gas pipeline 28 are sequentially connected to the gas outlet 6. A biomass gas burner 31 is installed at the end of the second gas pipeline 28. The high-temperature induced draft fan 27 generates negative pressure to draw out the biomass gas generated by the gasifier body 3, and then transports it to the biomass gas burner 31 for ignition and combustion, converting it into heat to fully utilize the biomass gas.

[0052] Furthermore, a biomass gas purification device 25 is installed between the gas outlet 6 and the first gas pipeline 26. When the biomass gas generated by the gasifier body 3 passes through the biomass gas purification device 25, the dust is purified and separated by the biomass gas purification device 25. The biomass gas purification device 25 can separate the dust in the newly generated biomass gas, preventing dust from accumulating on the subsequent first gas pipeline 26, high-temperature induced draft fan 27 and second gas pipeline 28, which would affect the service life of the equipment and the output of biomass gas.

[0053] Furthermore, a shut-off valve 30 and a venting device 29 are installed on the second gas pipeline 28. The shut-off valve 30 is located behind the venting device 29 along the direction of gas delivery. When necessary, the gas supply to the biomass gas burner 31 can be cut off by the shut-off valve 30, while the biomass gas in the gas pipeline can be discharged through the venting device 29 to improve the safety of the system.

[0054] Furthermore, the gasifier body 3 is composed of a water-cooled base 301, a composite furnace body 302, and a water-cooled furnace top 303. The water-cooled base 301, composite furnace body 302, water-cooled furnace top 303, and chain spokes 404 together define the furnace chamber of the gasifier body 3. The bottom of the gasifier body 3 is provided with a water-cooled base 301, and the top of the gasifier body 3 is provided with a water-cooled furnace top 303. Both the base and the top of the gasifier body 3 are cooled by circulating water, ensuring the strength and lifespan of the furnace body. The composite furnace body 302 is provided on the water-cooled base 301 of the gasifier body 3. The composite furnace body 302 stores heat energy to maintain the temperature required for the combustion and gasification of biomass raw materials, while also meeting the requirements for heat insulation.

[0055] Furthermore, a cooling zone 306 is provided at the rear of the gasifier body 3. The charcoal slag discharged from the slag discharge port 305 enters the cooling zone 306 for cooling, and a heat recovery unit 307 is installed above the cooling zone 306. After the charcoal slag is cooled by the cooling zone 306, the open flame is extinguished to prevent the open flame from damaging subsequent processing equipment.

[0056] Furthermore, the sealed feeder 1 includes a feed cylinder 101, in which an upper valve plate 103 and a lower valve plate 102 are provided. A material retention area is defined between the upper valve plate 103 and the lower valve plate 102. The upper valve plate 103 and the lower valve plate 102 work alternately by opening and closing. Since the upper valve plate 103 and the lower valve plate 102 open and close alternately, the furnace of the gasifier body 3 can be kept isolated from the outside world, so as to avoid a large amount of outside air being drawn into the furnace of the gasifier body 3 during feeding, which would lead to deflagration.

[0057] The following is in conjunction with the appendix Figures 1 to 24 The specific embodiments provided further illustrate the biomass raw material deep processing system proposed in this application.

[0058] Reference Figures 1 to 3 In some embodiments of this application, a biomass raw material deep processing system is provided, including a sealed feeder 1, a water-cooled screw feeder 2, a gasifier body 3, a water-cooled chain grate 4, a cooling zone 306, a first scraper conveyor 8, a water-cooled crusher 9, a second scraper conveyor 10, a drum-type slag cooler 11, a sealed belt conveyor 12, a magnetic separator 13, a collection hopper 14, a U-shaped screw feeder 15, a grinding mill 16, an induced draft fan 17, a cyclone collector 18, and a vibrating screen 19.

[0059] Reference Figures 1 to 3 In some embodiments of this application, the width of the water-cooled chain grate 4 is generally set at about three meters to facilitate transportation. The length of the water-cooled chain grate 4 is greater than the length of the gasifier body 3 plus the length of the cooling zone 306. The length of the gasifier body 3 is based on the volume length required by the current power design. The length of the cooling zone 306 is usually set to 2-3 meters. The charcoal slag can be temporarily eliminated in this area to remove the open flame of the charcoal slag.

[0060] In some embodiments of this application, the water-cooled chain grate 4 includes a grate base, a water-cooled bracket mounted on the grate base, a movable chain web 404 mounted on the water-cooled bracket, and a feeding motor for driving the chain web 404. Specifically, the feeding motor used in the water-cooled chain grate 4 has a power of 2.2 W / h, and preferably is equipped with a frequency converter. The gearbox of the water-cooled chain grate 4 has a transmission ratio of approximately 1:1100 to control the chain speed at 8-12 m / h, with the speed and power meeting the design requirement of 15% surplus under full load conditions. The grate base of the water-cooled chain grate 4 is made of carbon steel, capable of bearing a load approximately twice the weight of the gasifier body 3. The water-cooled bracket is fixedly mounted on the grate base to support the chain web 404 and simultaneously cool it. Specifically, in some embodiments, the water-cooled bracket is made of rectangular seamless carbon steel tubing, such as seamless carbon steel tubing of model GB3087. The water-cooled bracket is designed as a grid type, comprising several longitudinally arranged seamless carbon steel pipes. Adjacent longitudinal seamless carbon steel pipes are connected in series to form a water channel, and are reinforced by welding transverse connecting ribs to form a robust grid structure. Circulating cooling water flows through the seamless carbon steel pipes of the water-cooled bracket to cool the chain web 404. In some embodiments of this application, the water-cooled bracket has three sets of parallel water channels, mainly composed of longitudinal seamless carbon steel pipes. Each longitudinal seamless carbon steel pipe is located below the main grate of the chain web 404. Each set of seamless carbon steel pipes has a baffle plate at its end, distributing water to the parallel water channel branches for cooling through throttling. The design calculates the inlet temperature of the circulating cooling water and controls the outlet temperature of each set to approximately 90 degrees Celsius to ensure effective absorption of heat from the chain web 404 while preventing excessive vaporization of the cooling water. The outlet openings of the water-cooled bracket are located at the highest points of each parallel branch pipe. Wear-resistant manganese steel plates are installed on the longitudinal seamless carbon steel tube surface of the water-cooled bracket to prevent the moving chain web 404 from abrading the seamless carbon steel tube. In some embodiments of this application, the chain web 404 of the water-cooled chain grate 4 consists of main grate bars, auxiliary grate bars, and grate pins. The auxiliary grate bars and main grate bars are arranged longitudinally, in the same direction as the longitudinal seamless carbon steel tube. The grate pins are arranged laterally and connect the auxiliary grate bars and main grate bars to form the chain web 404. The chain web 404 is divided into an auxiliary grate bar area and a main grate bar area. Typically, the side closer to the feed is designated as the auxiliary grate bar area, and the side farther from the feed is designated as the main grate bar area. The auxiliary grate area includes all the auxiliary grate bars and a small number of main grate bars. Each auxiliary grate bar has ventilation gaps on both sides. Most of the air required for the gasifier body 3 to burn and convert biomass feedstock is supplied by the ventilation gaps of the auxiliary grate bars. That is, more air can circulate in the auxiliary grate area to burn the biomass feedstock on the feed side. It should be noted that the biomass feedstock on the feed side is mostly fragmented and burns slowly. Introducing more air can make the biomass feedstock on the feed side burn fully and keep the biomass combustion on both sides of the furnace synchronous.In addition, the main grate and auxiliary grate bars are made of nickel alloy containing a certain proportion of chromium to increase the corrosion resistance and high-temperature performance of the chain width 404. The water-cooled chain grate 4 of this application also has an air distribution area. Adjustable ventilation windows 401 are provided on the water-cooled chain grate 4 below the gasifier body 3 as a self-suction air area. Multiple adjustable ventilation windows 401 are symmetrically distributed on both sides of the chain grate, and all adjustable ventilation windows 401 are located below the gasifier body 3. Each adjustable ventilation window 401 consists of two windows connected together as a group, made of high-temperature resistant carbon steel plate in the form of an inverted trapezoidal long slot. Each group of windows is an independent compartment, and a valve plate is installed on the window to control the air intake of each group of windows, so as to meet the air volume combustion requirements of different chain width 404 sections within the gasifier body 3. The water-cooled chain grate 4 has load-bearing panels on both sides. The load-bearing panels are flat, and the two sides of the gasifier body 3 are fixed on the load-bearing panels. The load-bearing panels are 20-25mm higher than the chain width 404.

[0061] Reference Figures 1 to 3 , Figure 6 In some embodiments of this application, a gasifier body 3 is disposed above the water-cooled chain grate 4. The gasifier body 3 is square with a bottom opening and is fixed to the front end of the water-cooled chain grate 4. The gasifier body 3 consists of a water-cooled base 301, a composite furnace body 302, and a water-cooled furnace top 303.

[0062] Reference Figures 6 to 9In some embodiments of this application, the water-cooled base 301 is located at the bottom of the gasifier body 3 and adopts a non-pressure-bearing design. The water-cooled base 301 has an overall U-shaped structure, with an inner cavity in the middle for burning biomass raw materials, and cooling water flowing through the four walls of the U-shape, forming a water-cooled body. The water-cooled base 301 consists of a base plate 311, a top plate 312, an outer plate 313, and an inner plate 314. All plates are made of high-temperature resistant and wear-resistant carbon steel plates with a thickness of 14-16mm. The connecting surfaces of the plates are beveled and cleaned according to specifications, and welded using corresponding special welding materials according to the material of the base material. In some embodiments, the water-cooled base 301 adopts a flat bottom and a design that is higher at the front and lower at the back. The front height is 1000-1200mm and the rear height is 600-800mm. The side of the water-cooled base 301 is trapezoidal, and the upper panel 312 of the water-cooled base 301 is set at an angle. The inner cavity width of the water-cooled base 301 is 80mm smaller than the width of the chain width 404 of the water-cooled chain grate 4. The biomass raw materials and charcoal slag are contained within the chain width 404 by the gasifier body 3 for combustion and flow, preventing high temperature damage to the load-bearing panel of the water-cooled chain grate 4. A second water inlet pipe 317 is provided on the water-cooled body at the rear end of the water-cooled base 301, and a second water outlet pipe 318 is provided on the water-cooled body at the front end of the water-cooled base 301. The front water-cooled body of the water-cooled base 301 has a front partition plate 315 inside. The front partition plate 315 is vertically positioned in the middle of the horizontally placed water-cooled body at the front of the U-shaped base, dividing the rectangular body to prevent cooling water from flowing back. The rear water-cooled body of the water-cooled base 301 has a rear partition plate 316 inside. The width of the rear partition plate 316 is slightly larger than the diameter of the second inlet pipe 317. The rear partition plate 316 is vertically positioned in the middle of the horizontally placed water-cooled body at the rear of the U-shaped base. The two ends of the rear partition plate 316 are welded and fixed to the inner side plate 314 and the outer side plate 313. The function of the rear partition plate 316 is to distribute and guide the cooling water entering from the second inlet pipe 317, so that the water inlet is divided into two paths and flows from the water-cooled bodies on both sides of the U-shaped base to the two second outlet pipes 318 for even outflow. Both the front partition plate 315 and the rear partition plate 316 are made of carbon steel plate with a thickness of 10-12mm. In some embodiments, the second water inlet pipe 317 is made of seamless carbon steel and meets the flow requirements of the cooling water-cooled base 301. The second water inlet pipe 317 is installed horizontally through the water-cooling body on one side of the rear end of the water-cooled base 301, and the outlet of the second water inlet pipe 317 is aligned with the center of the rear partition plate 316 and fixed at a position approximately 160mm-200mm away from the rear partition plate 316.Two second water outlet pipes 318 are provided, located at the highest points on both sides of the front partition plate 315. These second water outlet pipes 318 are also made of seamless carbon steel. The cross-sectional area of ​​a single second water outlet pipe 318 is greater than half the cross-sectional area of ​​the second water inlet pipe 317, enabling the water-cooled base 301 to achieve a one-in-two-out cooling function for circulating cooling water, maintaining a relatively balanced overall cooling effect, and ensuring that superheated water or steam is discharged immediately. Furthermore, the angled arrangement of the upper panel 312 ensures that there are no dead air zones inside the water-cooled base 301, allowing the cooling water to fully contact and circulate with each plate, thus guaranteeing the strength and lifespan of the water-cooled base 301.

[0063] Furthermore, refer to Figure 8 In some embodiments of this application, a plurality of reinforcing ribs 319 are provided on the water-cooled body. The two ends of the reinforcing ribs 319 are welded to the inner side plate 314 and the outer side plate 313. The reinforcing ribs 319 are horizontally and evenly arranged in the water-cooled body to enhance the overall rigidity of the water-cooled base 301. In addition, a plurality of triangular plates 320 are provided at the bottom of the water-cooled body. The triangular plates 320 are respectively welded to the junction of the bottom plate and the side plate of the water-cooled body to further enhance the overall rigidity of the water-cooled base 301.

[0064] Furthermore, refer to Figure 7 and Figure 8 In some embodiments of this application, to prevent excessive pressure inside the water-cooled base 301 from causing accidents, a pressure relief pipe 308 is provided at the highest point of the water-cooling body at the front end of the water-cooled base 301. The diameter of the pressure relief pipe 308 is the same as the diameter of the second water inlet pipe 317. A pressure relief valve and a rear pressure relief pipe are provided on the pressure relief pipe 308. The starting pressure of the pressure relief valve is 0.05-0.06 MPa higher than the water supply pressure. When the pressure inside the water-cooled base 301 is too high, the pressure relief valve is activated to release excess water or steam inside the water-cooled base 301, thereby reducing the internal pressure of the water-cooled base 301 and ensuring safety. Furthermore, multiple drainage holes are required at the bottom of the horizontal section of the rear pressure relief pipe located behind the pressure relief valve to prevent water accumulation in the rear pressure relief pipe from affecting the pressure relief performance.

[0065] Reference Figure 6 and Figure 10In some embodiments of this application, a composite furnace body 302 is provided above the water-cooled base 301. The composite furnace body 302 is composed of multiple composite walls, the thickness of which is the same as the width of the water-cooled body on the water-cooled base 301. The composite furnace body 302 is built upwards from the water-cooled base 301 to the bottom of the furnace top. A water-cooled furnace top 303 is provided above the composite furnace body 302 to form the gasifier body 3. Generally, the height of the gasifier body 3 is between 2200-2400mm. The outer shell of the composite furnace body 302 is made of heat-resistant carbon steel plate and heat-resistant steel. The composite walls include an outermost heat insulation layer 321, which is composed of ceramic fiber and aluminum silicate board, with a thickness of more than 60mm. The heat insulation layer 321 is closely distributed from the upper panel 312 of the water-cooled base 301 to the bottom of the water-cooled furnace top 303. An insulating brick wall 322 is installed in close proximity to the thermal insulation layer 321. In some embodiments, the insulating brick wall 322 can be made of foamed lightweight perlite bricks. The insulating brick wall 322 is built from the upper panel 312 of the water-cooled base 301 to the bottom of the water-cooled furnace top 303. A high-alumina brick wall 324 is installed in close proximity to the insulating brick wall 322. The high-alumina brick wall 324 is located in the innermost layer of the composite wall. The high-alumina brick wall 324 is made of first-grade or extra-grade high-alumina bricks. The high-alumina brick wall 324 is built from the upper panel 312 of the water-cooled base 301 to the bottom of the water-cooled furnace top 303. Because the water-cooled base 301 adopts a front-high-back-low design, and the upper panel 312 is set at an angle, in order to ensure the flatness of the composite wall, a plastic material 325 needs to be used to fill the lower end of the upper panel 312. After leveling, the composite furnace body 302 is built by bricklaying. It should be noted that the Al2O3 content in the plastic material 325 is ≥60%, and the filling amount is based on the leveling of the brick wall. The insulation brick wall 322 and the high-alumina brick wall 324 should be constructed and built simultaneously, and bonded with a high-temperature adhesive. The gap between the bricks should be controlled within 2mm to ensure the strength of the composite furnace body 302 wall. In addition, during construction, every 4-5 bricks on the left and right and every 4-5 layers of bricks on the top and bottom, an interlocking inner wall high-alumina brick 323 needs to be set to interlock the insulation brick wall 322 and the high-alumina brick wall 324 into a wall to prevent separation and ensure the strength of the composite furnace body 302 wall. When the insulating brick wall 322 and the high-alumina brick wall 324 are built to the bottom of the water-cooled furnace top 303, some gaps need to be left to prevent the thermal expansion and contraction of the composite furnace body 302 from damaging the water-cooled furnace top 303. The gap between the brick surface of the wall top and the bottom plate 331 of the furnace top is usually controlled at 15-20mm as a buffer zone. The entire buffer zone is filled and compacted with ceramic fiber cotton. During the use of the gasifier body 3, the high-alumina brick wall 324 absorbs and stores a large amount of heat to provide high-temperature conditions for biomass gasification. The insulating brick wall 322 blocks most of the heat, and the insulation layer 321 insulates and keeps the heat insulated, controlling the shell temperature of the gasifier body 3 within the standard range.

[0066] Reference Figure 6 , Figure 11 and Figure 12 In some embodiments of this application, a water-cooled furnace top 303 is provided on the top of the gasifier body 3, and the water-cooled furnace top 303 is located above the composite furnace body 302. Generally, the length and width of the water-cooled furnace top 303 are 10mm larger than the length and width of the composite furnace body 302, and the water-cooled furnace top 303 also adopts a non-pressure-bearing design. The water-cooled furnace top 303 includes a furnace top bottom plate 331, a furnace top side plate 334, and a furnace top upper plate 335. All plates are made of high-temperature and wear-resistant carbon steel plates with a thickness of 12-14mm. The joint surfaces of the plates are beveled and cleaned according to specifications, and welded using corresponding special welding materials according to the material of the base material. The furnace top bottom plate 331 is connected to the composite furnace body 302. After splicing, the furnace top bottom plate 331 needs to be leveled to facilitate subsequent connection and manufacturing. The furnace top side plate 334 is set on the four edges of the furnace top bottom plate 331. The bottom of the furnace top side plate 334 is fully sealed and welded to the furnace top bottom plate 331. The length of the furnace top upper panel 335 is the longitudinal length of the water-cooled furnace top 303. The width of the furnace top upper panel 335 is the distance from the furnace top side plate 334 to the center of the partition pipe minus 20mm, or the distance between the centers of the two partition pipes minus 20mm. That is, a 20mm gap area 336 is reserved between the two furnace top upper panels 335 as a welding station space. The four sides of the furnace top upper panel 335 are fully sealed and welded to the furnace top side plate 334 (or partition pipe), and the entire furnace top forms a sealed chamber structure. A gas outlet 6 is provided on the water-cooled furnace top 303. Furthermore, an intermediate isolation structure is also provided within the water-cooled furnace top 303, dividing the water-cooled furnace top 303 into two sets of interlayer passages, with circulating cooling water flowing inside the interlayer for cooling. The intermediate isolation structure includes an intermediate partition pipe 332, which is a rectangular seamless carbon steel pipe. The intermediate partition pipe 332 is arranged longitudinally, starting from the front furnace top side plate 334 and / or the rear furnace top side plate 334, and extending to the gas outlet 6, isolating the entire sealed chamber of the furnace top in the middle, forming two independent areas. The bottom two sides of the intermediate partition pipe 332 are fully sealed welded to the furnace top bottom plate 331, and the two ends are fully sealed welded to the furnace top side plate 334 and the vertical plate of the gas outlet 6. Furthermore, a U-shaped partition pipe 333 is installed in the middle of the independent areas on both sides of the water-cooled furnace top 303. The U-shaped partition pipe 333 is a rectangular seamless carbon steel pipe, and its length is about 200cm shorter than the furnace top. One end of the U-shaped partition pipe 333 is welded tightly to the front side plate 334 of the furnace top, and the bottom two sides of the U-shaped partition pipe 333 are fully sealed to the bottom plate 331 of the furnace top, thus dividing the independent area into a U-shape. This application adopts a parallel inlet and outlet water circulation cooling design to avoid the problem of uneven cooling caused by excessively long paths in series cooling.

[0067] Reference Figure 11 and Figure 12In some embodiments of this application, a third water inlet pipe 337 and a third water outlet pipe are provided on the water-cooled furnace top 303. Two third water inlet pipes 337 are provided, located on either side of the intermediate partition pipe 332. The diameter of the third water inlet pipe 337 is the same as that of the second water outlet pipe 318 of the water-cooled base 301, and both are located on the same side and connected vertically by a water pipe. Cooling water flowing from the second water outlet pipe 318 enters the interior of the water-cooled furnace top 303 through the third water inlet pipe 337. The circulating cooling water flows through the interlayer within the water-cooled furnace top 303 and is discharged from the third water outlet pipe at the highest point of the path. The third water outlet pipe has an opening close to the upper panel 335 of the furnace top, and its diameter is one size larger than that of the third water inlet pipe 337, ensuring that superheated water or steam is discharged immediately without any dead air zones. It should be added that, if there are dead corners in the interlayer where convection is difficult, a baffle plate 338 can be added to guide the flow and contact of the cooling water. Through this structure, the cooling water is ensured to fully contact and circulate with the water-cooled furnace top 303, achieving a relatively balanced overall cooling effect and guaranteeing the strength and lifespan of the water-cooled furnace top 303. It should be understood that two second pressure relief pipes 309 are provided on the furnace top side plate 334 of the water-cooled furnace top 303, and their structure and function are consistent with the pressure relief pipe 308 of the water-cooled base 301.

[0068] Reference Figure 2 , Figure 3 , Figure 6 , Figure 11 and Figure 12 In some embodiments of this application, a gas outlet 6 is provided above the gasifier body 3. The gas outlet 6 is located in the middle of the water-cooled furnace top 303, near the rear end, with the edge of the gas outlet 6 500-600mm away from the wall of the composite furnace body 302. The gas outlet 6 is made of stainless steel pipe. In some embodiments of this application, to facilitate connection to the biomass gas purification device 25, at least part of the gas outlet 6 uses a square stainless steel pipe. The cross-sectional area of ​​the square stainless steel pipe is approximately twice the cross-sectional area of ​​the rear first gas pipe 26. The highest point of the gas outlet 6 is approximately 200-300mm above the water-cooled furnace top 303, and a flange is provided at the upper end of the gas outlet 6. The gas outlet 6 penetrates the water-cooled furnace top 303. The lower outer wall of the gas outlet 6 is flush with the furnace top bottom plate 331 and fully sealed by welding, while the upper outer wall of the gas outlet 6 is fully sealed by welding to the furnace top upper panel 335. The gas outlet 6 and the gas inlet 2508 of the biomass gas purification device 25 are connected by a stainless steel plate. The bending radius of the stainless steel plate is set to R>1.4D to eliminate the thermal stress of the pipeline and the compensation for thermal expansion and contraction. After the connection is installed and fixed, ceramic fiber blanket and stainless steel shell are wrapped in sequence for heat preservation. The surface temperature of the shell is controlled below 50℃.

[0069] Reference Figures 1 to 3 , Figure 5 In some embodiments of this application, a water-cooled screw feeder 2 is provided inside the gasifier body 3. The water-cooled screw feeder 2 is arranged laterally through the furnace of the gasifier body 3 to transport biomass raw materials into the furnace of the gasifier body 3. The conveying capacity of the water-cooled screw feeder 2 is designed according to the maximum power load of the gasifier. The water-cooled screw feeder 2 includes a main shaft 201 and screw blades 203 arranged on the main shaft 201. The main shaft 201 is arranged laterally through the furnace of the gasifier body 3, and the center of the main shaft 201 is about 1.5 meters away from the upper surface of the chain width 404 of the water-cooled chain grate 4. The feed end of the main shaft 201 extends 1.2 meters to the outside of the gasifier body 3 and is partially provided with a sleeve 202; a drive sprocket 205 is provided at the feed end of the main shaft 201, and a reduction motor is connected to the drive sprocket 205 through a chain to drive the main shaft 201 to rotate. In some embodiments, the sleeve 202 is a seamless 316L stainless steel tube. The inner end of the sleeve 202 is flush with the surface of the high-alumina brick wall 324, and the other end is sealed with a flange blind plate. The sleeve 202 has an opening at the corresponding position of the sealed feeder 1 and is connected to the lower outlet of the sealed feeder 1. The main shaft 201 on the opposite side of the feed end is installed through the composite furnace body 302. Both ends of the main shaft 201 are provided with bearing seats 204 for support. The feed end is supported by a tapered ball bearing. When installing the flat bearing at the other end, it must maintain a distance of about 20mm from the step of the main shaft position to prevent the main shaft 201 from hitting the bearing due to high temperature expansion. The main shaft 201 is made of seamless carbon steel tube. To maintain rigidity and strength, the main shaft 201 must be installed as a whole and cannot be spliced. The spiral blade 203 is wound on the main shaft 201. The spiral blade 203 is made of 304 stainless steel with a thickness of 6-8mm. Generally, the pitch is 220-260mm. The selection rules for the spiral blades 203 are as follows: when viewed from the front of the gasifier body 3 and the sealed feeder 1 is installed on the left, right-hand spiral blades 203 are used; conversely, when viewed from the back of the gasifier body 3 and the sealed feeder 1 is installed on the right, left-hand spiral blades 203 are used. The direction of rotation must be correct to ensure that the biomass feedstock between the main shaft 201 and the front high-alumina brick wall 324 is pushed upwards during feeding. An incorrect direction of rotation will result in uneven feeding. The water-cooled spiral feeder 2 is controlled by the material level controller 5 to start and stop. When the water-cooled spiral feeder 2 is working, it continuously fills the front space of the gasifier body 3 with a fixed horizontal height. The chain width 404 of the water-cooled chain grate 4 moves longitudinally to move the biomass feedstock to the rear end and fill the entire furnace.

[0070] Furthermore, refer to Figure 5In some embodiments of this application, to achieve cooling of the water-cooled screw feeder 2, rotary joints 206 are respectively provided at both ends of the main shaft 201. During operation, circulating cooling water flows inside the main shaft 201 for cooling, and the direction of water inflow and outflow is not limited. When a single-end water inflow and outflow is required in a special scenario, an internal flow pipe is installed inside the main shaft 201, and the other end of the main shaft 201 is blocked. One end of the internal flow pipe is connected to a double-through rotary joint, and the other end is 150mm away from the blocking head and supported by a circular plate. The circular plate has through holes to achieve reverse circulation of cooling water. Whether the water-cooled screw feeder 2 adopts a double-end water inflow and outflow or a single-end water inflow and outflow, the mechanical strength and service life of the water-cooled screw feeder 2 can be guaranteed.

[0071] Reference Figures 1 to 4 In some embodiments of this application, the sealed feeder 1 is disposed above the feed end of the water-cooled screw feeder 2. The sealed feeder 1 includes a rectangular feed cylinder 101, the top of which is connected to the hopper of the biomass raw material, and the lower end of the feed cylinder 101 is configured as a trapezoidal body 105, the lower part of which is connected to the opening of the sleeve 202. Preferably, the feed cylinder 101 and the trapezoidal body 105 can be made of carbon steel plate with a thickness of 6-8 mm. The feed cylinder 101 is equipped with two valve plates: an upper valve plate 103 and a lower valve plate 102. In some embodiments, the upper valve plate 103 is located approximately 600 mm above the lower valve plate 102, defining a material retention area between them. During operation, the upper valve plate 103 and the lower valve plate 102 alternately open and close. When the upper valve plate 103 is open, the lower valve plate 102 is closed, allowing the material above to pass through. The material falls into the material holding area. When the upper valve plate 103 closes, the lower valve plate 102 opens, allowing the raw material in the holding area to fall into the water-cooled screw feeder 2, achieving continuous intermittent feeding into the water-cooled screw feeder 2. Because the upper valve plate 103 and the lower valve plate 102 open and close alternately, the gasifier body 3 furnace chamber is kept isolated from the outside environment, preventing a large amount of outside air from being drawn into the gasifier body 3 furnace chamber during feeding, which could lead to deflagration. Furthermore, the valve plate can be a plug-in type or a hinged type. Plug-in type valves require guide rails to enhance operational stability and sealing, such as... Figure 4 As shown, in some embodiments, sliding guide rails 104 are provided at the positions of both valve plates inside the feed cylinder 101. The upper valve plate 103 and the lower valve plate 102 are slidably mounted on the sliding guide rails 104 to ensure smooth operation and sealing of the upper valve plate 103 and the lower valve plate 102. For hinged valves, a swing arm is provided on the rotating shaft to realize the flipping and opening / closing action of the valve plates. Regardless of whether a plug-in or hinged valve is used, a seal must be achieved when the valve plate is closed to reduce the intake of air into the gasifier body 3 due to the negative pressure in the furnace chamber.

[0072] Reference Figures 1 to 3 , Figure 13In some embodiments of this application, a material level controller 5 is provided inside the gasifier body 3. The material level controller 5 is vertically installed through the water-cooled furnace top 303 and is located on the opposite side of the sealed feeder 1, at a distance of 150-200mm from the brick surface of the high-alumina brick wall 324. The material level controller 5 has a swing arm structure and includes a mounting base plate 501, an adjusting plate 502, and a swing arm. The mounting base plate 501 is fixedly mounted on the upper surface of the water-cooled furnace top 303. Vertical adjustment plates 502 are respectively provided on both sides of the mounting base plate 501. A slot is provided in the middle of the mounting base plate 501, and the swing arm is vertically inserted through the slot. In some embodiments, the total length of the swing arm is approximately 1400mm, and the upper end of the swing arm is 700-800mm above the top surface of the water-cooled furnace top 303. A horizontal pivot pin 505 is provided on the swing arm at the position corresponding to the adjustment plate 502. Several adjustment holes are provided on the adjustment plate 502, and the pivot pin 505 passes through the adjustment holes as a movable fulcrum, allowing the swing arm to swing around the pivot pin 505 as the rotation center. The slot is also shaped to match the movement trajectory of the swing arm, thus limiting the swing arm movement of the material level controller 5. The swing arm includes an outer tube 503 and a second inner tube 504. The outer tube 503 has an open top and a carbon steel plate sealing the bottom. The second inner tube 504 is inserted into the outer tube 503 from above, with its upper end higher than the outer tube 503 and equipped with a water inlet. A 50-60mm reflux zone 508 is left between the bottom of the second inner tube 504 and the bottom of the outer tube 503. The upper end of the outer tube 503 is sealed to the outer surface of the second inner tube 504 by welding, forming a cross-flow jacket between the outer tube 503 and the second inner tube 504. The water outlet is located on the top side of the outer tube 503. Cooling water enters from the water inlet at the top of the second inner tube 504, passes through the second inner tube 504, reaches the reflux zone 508, enters the cross-flow jacket from the reflux zone 508, and finally flows out from the water outlet at the top of the outer tube 503. During the flow, the cooling water carries away the heat of the swing arm for cooling, preventing the swing arm of the material level controller 5 from bending or being damaged due to the high temperature inside the furnace. Furthermore, the circulating cooling water needs to be connected to the inlet and outlet of the swing arm using a hose to achieve a certain range of swing amplitude. A baffle 507 is set at the bottom of the swing arm. The baffle 507 swings with the swing arm and is located on the rear side within the diameter range of the spiral blade 203. When the water-cooled screw feeder 2 is working, the pushed biomass raw material reaches the baffle 507 and causes the material level controller 5 to swing. The swing of the material level controller 5 touches the set limit switch, and the limit switch controls the water-cooled screw feeder 2 to stop. When the chain width 404 of the moving chain grate 4 moves the biomass raw material, the material level controller 5 is released, the limit switch is reset, and the water-cooled screw feeder 2 is restarted. This cycle repeats, so that the biomass raw material in the gasifier body 3 is distributed at a consistent height, ensuring the required capacity thickness for gasification.Because the temperature inside the gasifier body 3 is high (generally 450-500℃) and there is a lot of dense smoke, photoelectric material level control is basically unsuitable. Therefore, the material level controller 5 of this application adopts a swing arm structure and water-cooled design to overcome the special environment of high temperature and dust inside the gasifier body 3 and ensure the material layer control of biomass raw materials.

[0073] Furthermore, refer to Figure 13 In some embodiments of this application, the material level controller 5 is also provided with a movable sealing plate 506. The width of the movable sealing plate 506 is slightly smaller than the distance between the two adjusting plates 502. The length of the movable sealing plate 506 is greater than twice the length of the middle slot of the mounting base plate 501. The movable sealing plate 506 is provided with a through hole. The diameter of the through hole is 1mm larger than the outer diameter of the outer tube 503. The movable sealing plate 506 is fitted onto the outer tube 503 through the through hole. After installation, the movable sealing plate 506 is placed on the upper surface of the mounting base plate 501. When the swing arm moves, the movable sealing plate 506 moves with the swing arm, which serves to block the middle slot of the mounting base plate 501 and prevent a large amount of air from being sucked into the furnace of the gasifier body 3.

[0074] Furthermore, in some embodiments of this application, the adjusting plate 502 is provided with several vertically arranged adjusting holes. Before use, the length of the material level controller 5 extending into the furnace can be adjusted by adjusting the position of the adjusting pin 505 on the adjusting plate 502, thereby controlling the height of the material layer.

[0075] Reference Figure 2 , Figure 3 and Figure 6 In some embodiments of this application, an ignition port 304 is provided at the bottom front end of the gasifier body 3. The length of the ignition port 304 is consistent with the width of the furnace chamber of the gasifier body 3. The height difference between the lowest point of the ignition port 304 and the chain web 404 is 100-120mm. The height of the ignition port 304 should not be too high, just enough to allow for ignition during start-up. In some embodiments, the ignition port 304 is actually a concave shape formed by the upward indentation of the horizontally placed water-cooled body at the front end of the water-cooled base 301. A sealing door / sealing cover is provided on the outer side of the ignition port 304 of the gasifier body 3. The sealing door / sealing cover is made of heat-resistant carbon steel plate. When closed, the bottom edge of the sealing door / sealing cover is less than 2mm from the upper surface of the chain web 404. When the gasification equipment is running cold, ignition is required from the ignition port 304. The ignited biomass feedstock then ignites other biomass feedstocks in the furnace chamber. After ignition, close the sealing door / cover of ignition port 304 to prevent a large amount of air from being drawn into the furnace from ignition port 304, which would affect the normal combustion and gasification of biomass raw materials.

[0076] Reference Figure 2 , Figure 6 and Figure 9In some embodiments of this application, a slag discharge port 305 is provided at the bottom rear end of the gasifier body 3. The length of the slag discharge port 305 is consistent with the width of the furnace chamber of the gasifier body 3, and the height of the slag discharge port 305 is approximately 280-320mm. In some embodiments, the slag discharge port 305 is actually a concave shape formed by the upward indentation of the horizontally placed water-cooled body at the rear end of the water-cooled base 301. When designing the size of the slag discharge port 305, the slag discharge volume and the grate speed should be considered so that the slag discharge port 305 can meet the slag discharge volume under the maximum load of the gasifier device.

[0077] Reference Figure 2 In some embodiments of this application, a water-cooled baffle 7 is provided on the outer side of the ash discharge port 305 of the gasifier body 3. The water-cooled baffle 7 consists of a baffle body, lifting rods, and a power mechanism. The baffle body has a water-cooled structure to increase its service life. Lifting rods are provided at both ends of the baffle body. The lifting rods are typically threaded, and the power mechanism can drive the lifting rods using gear engagement to raise and lower the baffle body, thus achieving the function of horizontally raising and lowering the water-cooled baffle 7. The water-cooled baffle 7 is installed close to the gasifier body 3, and limit slots are provided at both ends to prevent deviation when the baffle body moves up and down. By raising and lowering the water-cooled baffle 7, the outlet height of the ash discharge port 305 can be adjusted, thereby controlling the ash discharge volume and the air intake volume of the ash discharge port 305, increasing the load adjustment range of the gasifier body 3 and meeting more production scenarios.

[0078] Reference Figure 2 In some embodiments of this application, a cooling zone 306 is provided at the rear of the gasifier body 3. The cooling zone 306 is located outside the slag discharge port 305, and the gasifier body 3 and the cooling zone 306 are connected through the slag discharge port 305. The char slag discharged from the slag discharge port 305 is extinguished and cooled in the cooling zone 306. The inner and outer widths of the wall of the cooling zone 306 are the same as the width of the gasifier body 3. The length of the cooling zone 306 is based on the stroke required to extinguish the open flame when the equipment is under maximum load, which is usually 2-3 meters. The internal height of the cooling zone 306 is approximately 400-500 mm. The shell of the cooling zone 306 is made of heat-resistant carbon steel plate with a thickness of 6-8 mm and reinforcing ribs. The shell is filled with heat-insulating, heat-resistant, and refractory materials. The manufacturing method and process are basically the same as those of the composite furnace body 302.

[0079] Furthermore, refer to Figure 2In some embodiments of this application, a heat recovery unit 307 is provided above the cooling zone 306. The heat recovery unit 307 can be a coil type, a membrane type, or a water tank type, etc. The size range of the heat recovery unit 307 is consistent with that of the chain web 404 in the cooling zone 306. During manufacturing, a through hole of the same size is reserved at the corresponding discharge bucket 2506 position. The heat recovery unit 307 is horizontally fixed above the cooling zone 306, and its bottom is about 400mm away from the chain web 404, that is, it is located at the high temperature of the tail of the charcoal combustion flame, which can fully recover the heat energy generated by the combustion of charcoal. The heat recovery unit 307 is water-intake point at the lowest point and the water outlet point is located at the highest point, so that the superheated water or steam is discharged immediately. The circulating cooling water is supplied by an independent hot water pipeline pump. For safety reasons, the outlet water temperature of the heat recovery unit 307 does not exceed 100 degrees Celsius (if low-pressure steam is required, a pressurized heat recovery unit needs to be configured), and the generated hot water is drawn out for utilization. The heat recovery unit 307 is equipped with a thermal insulation layer composed of ceramic fiber blanket and aluminum silicate board, and the surface temperature is controlled below 50℃.

[0080] Reference Figures 1 to 3 , Figure 14 and Figure 15 In some embodiments of this application, a first scraper conveyor 8 is provided at the bottom rear end of the water-cooled chain grate 4. The first scraper conveyor 8 and the water-cooled chain grate 4 are arranged in an L-shape. The first feed inlet 806 on the first scraper conveyor 8 is fixedly set corresponding to the point where the charcoal and slag fall from the water-cooled chain grate 4. The charcoal and slag, after being extinguished and cooled, move with the chain width 404 to the rear and fall into the first feed inlet 806 of the first scraper conveyor 8. The length of the first feed inlet 806 is the same as the width of the chain width 404. Figure 14As shown, for ease of transportation, the first scraper conveyor 8 is designed as a multi-section structure, consisting of a horizontal section, an arc section, and a raised section. The horizontal section is approximately 2 meters longer than the width of the water-cooled chain grate 4, and the end adjustment device bearings, etc., need to be located outside the water-cooled chain grate 4 for convenient daily use and maintenance. The raised section is designed so that the space below the first discharge port 812 can accommodate a water-cooled crusher 9, with a transition arc generally around 0.5 rad. The width of the first scraper conveyor 8 is designed to meet the maximum load capacity of the charcoal and slag transport, with an internal net width of 360-380 mm and a depth typically set at 600-700 mm. The first scraper conveyor 8 includes a first housing 801, which is made of heat-resistant and wear-resistant carbon steel plate or manganese steel plate with a thickness of 10-12mm. The first housing 801 is formed by sealing and welding a bottom plate, side plate and end plate into a concave groove with an upper opening. The joints in the groove are sealed and smooth. An upper sealing cover 805 is provided at the upper opening of the first housing 801. The upper sealing cover 805 is made of 5mm carbon steel plate by bending. The upper sealing cover 805 is installed in a sealed manner by fitting the upper edge of the side plate and end plate of the first housing 801. The temperature of the carbon slag scraped by the first scraper conveyor 8 reaches approximately 300℃. To prevent damage to the equipment due to high temperature, side water-cooled bodies 808 are provided on both sides of the first housing 801, and a bottom water-cooled body 811 is provided at the bottom of the first housing 801. Both the side water-cooled bodies 808 and the bottom water-cooled body 811 are made of carbon steel plates folded into a U-shape and sealed and welded to the first housing 801. Circulating cooling water flows inside both the side water-cooled bodies 808 and the bottom water-cooled body 811, cooling the first housing 801 and removing the heat from the carbon slag. The thickness of the circulating cooling water in the side water-cooled bodies 808 and the bottom water-cooled body 811 is 100mm. The water inlet and outlet of the side water cooler 808 and the bottom water cooler 811 follow the principle of low inlet and high outlet. That is, the side water cooler 808 has a side water cooler inlet 813 at the lowest point and a side water cooler outlet 814 at the highest point on the other end; the bottom water cooler 811 has a bottom water cooler inlet 815 at the lowest point and a bottom water cooler outlet 816 at the highest point on the other end. The interfaces of the side water cooler inlet 813, the side water cooler outlet 814, the bottom water cooler inlet 815, and the bottom water cooler outlet 816 can all be made with threads to facilitate the connection of hoses, so that the inlets and outlets of adjacent water coolers can be connected together by hoses. The first scraper conveyor 8 also includes a first reduction motor 809, a drive shaft 810, a driven shaft 804, a first bearing 803, and a tensioner 802. The drive shaft 810 and the driven shaft 804 are rotatably mounted on the first scraper conveyor 8 via the first bearing 803. A transmission chain is provided between the drive shaft 810 and the driven shaft 804. The first reduction motor 809 drives the drive shaft 810 to rotate, thereby moving the transmission chain to transport carbon slag. The tensioner 802 is provided between the first housing 801 and the transmission chain and is used to adjust the tension of the transmission chain.The drive shaft 810, driven shaft 804, first bearing 803 and tensioner 802 are all made of high-temperature resistant materials.

[0081] Reference Figure 1 , Figure 3 , Figures 16 to 18 In some embodiments of this application, a water-cooled crusher 9 is provided below the first discharge port 812 of the first scraper conveyor 8. The water-cooled crusher 9 is used to crush charcoal slag and large pieces of coke into charcoal slag particles of a pre-set specification. The crushed small charcoal slag particles are beneficial for heat dissipation and cooling, and can pass through downstream equipment for processing. At the same time, it also improves the efficiency of extinguishing charcoal fire, allowing the charcoal fire to be extinguished quickly and completely. The water-cooled crusher 9 includes a crusher base 901 made of carbon steel. Two rotating toothed rollers 905 are provided on the crusher base 901. The diameter of the rotating toothed rollers 905 is about Φ400mm. The two rotating toothed rollers 905 are installed in opposite directions and meshing. Each rotating toothed roller 905 is equipped with a crushing motor 902 with a power of 5.5kw / h. The crushing motor 902 drives the rotating toothed rollers 905 to rotate in opposite directions through a pulley 903 and a belt drive. To maintain the synchronization of the two rotating toothed rollers 905, gear discs are installed on the two rotating toothed rollers 905 for meshing and rotation. Furthermore, each rotating toothed roller 905 is equipped with a self-retracting spring 906 at both ends. When the rotating toothed roller 905 encounters a hard object such as an iron block, it can overcome the force of the self-retracting spring 906 and retreat, thereby effectively preventing damage to the rotating toothed roller 905 by the hard object and extending its service life. A crushing inlet 904 is provided at the upper part of the meshing area of ​​the two rotating toothed rollers 905, and a crushing outlet 907 is provided at the lower part of the meshing area. The charcoal slag scraped by the first scraper conveyor 8 enters the meshing area of ​​the two rotating toothed rollers 905 through the crushing inlet 904 and is crushed by the rotation of the two rotating toothed rollers 905. Because the temperature of the charcoal slag scraped by the first scraper conveyor 8 is as high as about 300 degrees Celsius, and the biomass char produced by high-temperature combustion may contain coke lumps formed by high-temperature sintering, in order to cope with the high-temperature working environment and prevent the rotating shaft of the rotating toothed roller 905 from being deformed and damaged by high temperature, this application adopts a water-cooled shaft 908 as the rotating shaft of the rotating toothed roller 905. Figure 18As shown, in some embodiments, the water-cooled shaft 908 includes a shaft body 981 made of seamless stainless steel tubing. One end of the shaft body 981 is provided with a double-pass rotary joint 909, and the other end is sealed with a cap 983. An inner tube 982 is provided inside the shaft body 981. The inner tube 982 is made of seamless carbon steel tubing, and its length extends from the double-pass rotary joint 909 to a distance of 60-80 mm from the end of the cap 983. One end of the inner tube 982 is connected to the double-pass rotary joint 909, and the other end passes through the inner tube hole of a flow equalizer 984. The flow equalizer 984... Made of carbon steel plate, the flow equalizer 984 is installed inside the shaft 981 and fixed to the end of the inner tube 982. A reflux area is provided between the flow equalizer 984 and the end cap 983. The flow equalizer 984 has one inner tube hole and multiple flow diversion holes, typically 6-8, which are evenly distributed around the inner tube hole. The total cross-sectional area of ​​the flow diversion holes is larger than that of the inner tube 982. Cooling water is supplied by a water pump, entering through the inlet of the double-pass rotary joint 909, passing through the inner tube 982 to the reflux area at the tail end of the shaft 981, and then returning through the flow diversion holes. The cooling water flows through the interlayer between the shaft 981 and the inner tube 982 and exits through the outlet of the double-pass rotary joint 909, thus cooling the shaft 981 and extending the service life of the equipment.

[0082] Reference Figure 1 In some embodiments of this application, a second scraper conveyor 10 is provided at the crushing discharge port 907 of the water-cooled crusher 9. The structure of the second scraper conveyor 10 can be the same as that of the first scraper conveyor 8 described above, and will not be described again here. The granular slag crushed by the water-cooled crusher 9 is scraped by the second scraper conveyor 10 into the second feed port 1102 of the drum-type slag cooler 11. It should be noted that the raised section of the second scraper conveyor 10 needs to match the height of the second feed port 1102 of the drum-type slag cooler 11.

[0083] Reference Figure 1 , Figure 19 and Figure 20In some embodiments of this application, a drum-type slag cooler 11 is provided at the discharge port of the second scraper conveyor 10. The drum-type slag cooler 11 includes a first base 1101, on which a cylinder 1103 is provided. The length of the cylinder 1103 is about 1600mm. The cylinder 1103 is made of 8-10mm carbon steel manganese plate. Rolling rings 1116 are provided on the outer periphery of both ends of the cylinder 1103. Four support rollers 1117 are provided on the first base 1101 corresponding to the positions of the rolling rings 1116. The cylinder 1103 is supported by the support rollers 1117. The inner ends of the rolling rings 1116 are provided with limiting movable stop rollers 1119 to prevent the cylinder 1103 from shifting when rotating. The cylinder 1103 contains two concentric rings of 18 slag tubes 1104. The slag tubes 1104 are made of seamless carbon steel and are approximately 520mm shorter than the cylinder 1103. Both ends of the cylinder 1103 are equipped with perforated end plates 1118, made of 14mm thick carbon steel manganese plate. The outer diameter of the perforated end plates 1118 is 1.5-2mm smaller than the inner diameter of the cylinder 1103. Two concentric rings of evenly distributed mounting holes for the slag tubes 1104 are provided on the perforated end plates 1118. The perforated end plate 1118 at the discharge end has corresponding mounting holes for the water collection pipe 1107. After the slag tubes 1104 are welded to the perforated end plates 1118, the entire assembly is inserted into the center of the cylinder 1103, and the perforated end plates 1118 at both ends are sealed and welded to the cylinder 1103. Since the slag pipe 1104 is shorter than the cylinder 1103, there is a space of about 260mm between the porous end plate 1118 and both ends of the cylinder 1103, which serves as the feed buffer area 1115 and the discharge buffer area 1113. The water collection pipe 1107 is made of seamless carbon steel pipe in an L-shape. One end of the water collection pipe 1107 is connected to the double-layer rotating shaft 1110, and the other end of the water collection pipe 1107 passes through the porous end plate 1118 and is installed and fixed about 200mm away from the other porous end plate 1118. A multi-slot space is formed between the inner wall of the cylinder 1103 and the outer side of the slag pipe 1104 to circulate cooling water. The cooling water flows in the opposite direction to the carbon and slag. The water enters through the central port of the first rotary joint 1109, passes through the inner pipe of the double-layer rotating shaft 1110, and enters the water-cooled cavity at the second outlet 1111. To achieve uniform cooling, the water entering the water-cooled cavity is usually divided into multiple streams. The cooling water flows towards the feed buffer zone 1115, and then converges into the outlet collection pipe 1107 through a multi-point, multi-stream branch pipe. Finally, it is discharged from the outlet of the first rotary joint 1109 through the interlayer of the double-layer rotating shaft 1110. To ensure the safety of equipment operation, the outlet water temperature is controlled below 85 degrees Celsius, and a third pressure relief valve 1114 is provided on the outer side of the cylinder 1103 to safely release pressure when the water-cooled cavity pressure is too high or the temperature exceeds the limit.The space between the perforated end plate 1118 and the front end cap of the feed end is the feed buffer area 1115. Multiple arc-shaped scrapers 1106 are provided on the perforated end plate 1118 of the feed end. The rotation direction of the arc-shaped scrapers 1106 is the same as that of the spiral blades 1105. When the cylinder 1103 rotates, it scrapes up the carbon slag and lets it fall freely into the slag pipe 1104. The space between the perforated end plate 1118 of the other end and the rear end cap of the discharge end is the discharge buffer area 1113. Similarly, scrapers are also provided on the perforated end plate 1118 of the discharge end to scrape up the carbon slag and let it fall into the second discharge port 1111. The slag tube 1104 is equipped with a spiral blade 1105, which is made of 6mm thick carbon steel manganese plate. The outer diameter of the spiral blade 1105 is 0.8-1.0mm smaller than the inner diameter of the slag tube 1104, and the pitch is 180-200mm. The spiral blade 1105 is fitted into the slag tube 1104 and fixed in place. A first gear is installed on the rear end of the cylinder 1103, and a second reduction motor 1108 is installed at the rear of the cylinder 1103. The gear of the second reduction motor 1108 meshes with the first gear to drive the cylinder 1103 to rotate. As the slag rotates, it is guided forward by the spiral blade 1105. The slag particles come into contact with the slag tube 1104 and the spiral blade 1105, and the heat is carried away by the flowing cooling water. The slag cools down and extinguishes. The temperature of the extinguished slag particles is below 90℃. The slag particles finally fall into the discharge buffer zone 1113 and are scraped by the scraper to the second discharge port 1111 for discharge.

[0084] Furthermore, such as Figure 19 As shown, in some embodiments of this application, to prevent dust from being carried out by heat during the rotation of the carbon slag, pneumatic sealing covers 1112 are respectively provided on the front and rear end caps. The pneumatic sealing covers 1112 are fixed on the pipes of the second inlet 1102 and the second outlet 1111, and are set close to the front and rear end caps (with a gap of less than 0.2 mm). The pneumatic sealing cover 1112 includes a central hole and an airbag ring arranged around the central hole. The size of the central hole matches the diameter of the pipe of the second inlet 1102 or the pipe of the second outlet 1111. The airbag ring is connected to an external compressed air source through an L-shaped air inlet channel. The cross-sectional area of ​​the air inlet side of the airbag ring is larger than that of the opposite side, in order to ensure that the air pressure of the entire airbag ring is balanced. Compressed air is injected into the airbag ring from the L-shaped air inlet channel and blown out from the inside of the airbag ring, forming an air wall for sealing, preventing fine powder from leaking out and flying when the cylinder 1103 rotates.

[0085] Reference Figure 1In some embodiments of this application, a sealed belt conveyor 12 is provided at the second discharge port 1111 of the drum-type slag cooler 11. The sealed belt conveyor 12 is set at an angle, and the inlet end of the sealed belt conveyor 12 is lower than the second discharge port 1111 of the drum-type slag cooler 11. The sealed belt conveyor 12 is supported by carbon steel channel steel and angle steel, and uses a high-temperature resistant nylon rubber belt (500-600mm wide). A nylon bristle brush is set on the outside of the shaft position at the discharge port of the sealed belt conveyor 12 to sweep off the carbon powder particles adhering to the nylon rubber belt. A magnetic separator 13 is set at a position of about 1500mm from the inlet end of the sealed belt conveyor 12. The distance between the magnetic separator 13 and the nylon rubber belt is controlled within the magnetic field range. When the carbon slag particles pass through the magnetic separator 13, the ferromagnetic metal is attracted and discharged.

[0086] Reference Figure 1 and Figure 21 In some embodiments of this application, a hopper 14 is provided at the discharge end of the sealed belt conveyor 12. The hopper 14 stores the carbon slag particles conveyed by the sealed belt conveyor 12. When a certain amount is stored, the downstream equipment is triggered to start working. The hopper 14 includes a hopper support 1401 and an upper barrel 1402 disposed above the hopper support 1401. A third inlet 1404 is provided on the upper barrel 1402. The top of the upper barrel 1402 has a manhole 1403 for inspection and maintenance and is covered by a flange blind plate. A conical cylinder 1405 is provided at the lower part of the upper barrel 1402. The volume of the upper barrel 1402 and the conical cylinder 1405 is generally set to 3-4 cubic meters. The discharge end of the sealed belt conveyor 12 is embedded in the third inlet 1404 of the collecting hopper 14. The connection between the discharge end of the sealed belt conveyor 12 and the third inlet 1404 must be properly sealed. The discharge end of the sealed belt conveyor 12 extends into the upper barrel 1402 near the middle position, and the charcoal slag particles are thrown into the middle of the conical cylinder 1405. A first unloader 1406 is provided at the bottom of the conical cylinder 1405, and a first level gauge 1407 is provided at the top of the conical cylinder 1405. When the charcoal slag particles accumulate to the first level gauge 1407, the first unloader 1406 at the bottom is activated to feed the charcoal slag particles into the fourth inlet 1504 of the U-shaped screw feeder 15. To adapt to the charcoal powder processing speed of the downstream equipment, the motor of the first unloader 1406 is equipped with a frequency converter for adjustment.

[0087] Reference Figure 1 and Figure 21In some embodiments of this application, a U-shaped screw feeder 15 is provided below the first unloader 1406 of the collecting hopper 14. The fourth inlet 1504 of the U-shaped screw feeder 15 is sealed to the outlet of the first unloader 1406 of the collecting hopper 14. The U-shaped screw feeder 15 includes a U-shaped housing 1501, with a U-shaped groove formed inside the U-shaped housing 1501. A second main shaft 1502 is provided inside the U-shaped housing 1501. The length of the second main shaft 1502 extends from its end to approximately 150 mm from the material stopper 1506. A second spiral blade 1503 is wound around the second main shaft 1502. The U-shaped screw feeder 15 adopts a single-end bearing fixing form. A tapered ball bearing is configured on the second bearing seat 1507. A second transmission sprocket 1508 is provided at one end of the second main shaft 1502 for connecting to a drive motor for driving. The U-shaped shell 1501 is made of 10mm thick carbon steel manganese plate, and its length generally does not exceed 3 meters. The outer arc radius of the U-shaped channel is R=180mm. A second sealing cover 1505 is installed on the top of the U-shaped channel. The U-shaped channel at the power end is sealed with a flange blind plate, and the other end is connected to the fifth feed port 1603 of the grinding mill 16 by a flange. A material blocker 1506 is installed in the U-shaped screw feeder 15 at a position about 150mm away from the fifth feed port 1603 of the grinding mill 16. The material blocker 1506 includes a material blocker plate and an L-shaped swing arm. The L-shaped swing arm is provided with a counterweight hanging hole. An appropriate counterweight can adjust the resistance of the material blocker plate being pushed open. When the carbon slag particles are pushed by the U-shaped screw feeder 15, the material blocker plate is pushed by the accumulated carbon slag particles and tilted, reducing the voids at the discharge end of the U-shaped shell 1501 and preventing the airflow from the blower 17 from entering the U-shaped screw feeder 15 and the equipment at the front end through the voids.

[0088] Reference Figure 1 , Figure 21 and Figure 22In some embodiments of this application, a grinding mill 16 is provided at the end of the U-shaped screw feeder 15. The fifth inlet 1603 of the grinding mill 16 is connected to the outlet end of the U-shaped screw feeder 15. The grinding power efficiency of the configured grinding mill 16 is greater than the amount of char residue discharged from the biomass gasifier. The grinding mill 16 includes a grinding mill base 1606, which is made of shaped steel and carbon steel plate. A grinding chamber 1604 is provided on the grinding mill base 1606. The fifth inlet 1603 is opened on the side wall of the grinding chamber 1604. An upper conical body 1602 is provided on the upper part of the grinding chamber 1604. A char outlet 1601 is provided at the top of the upper conical body 1602. A char flow pipe 1609 is provided on the char outlet 1601. One end of the char flow pipe 1609 is connected to the char outlet 1601, and the other end is connected to the side inlet 1804 of the cyclone collector 18. The carbon slag particles are pushed into the grinding chamber 1604. The grinding motor 1608 drives two rolling ring rollers on the central shaft to repeatedly grind the carbon slag particles into fine carbon powder. The fine carbon powder is blown out of the carbon powder outlet 1601 by the airflow from the working induced draft fan 17, passes through the carbon powder flow pipe 1609 and enters the second cylinder 1802 through the side inlet 1804 of the cyclone collector 18. The fine carbon powder is separated by centrifugal force and accumulates as the airflow rotates. After the airflow rotates and throws away the carbon powder in the cyclone collector 18, the air exits from the top outlet 1803 and returns to the induced draft fan 17 through the return air pipe 1701. The air is blown out by the induced draft fan 17 through the air blowing pipe 1702 and blown into the grinding chamber 1604 through the grinding chamber air inlet 1607, and circulates back and forth. The airflow is transported and collected in a closed loop within the grinding mill 16, the induced draft fan 17, and the cyclone collector 18. The impurities contained in the carbon slag are too heavy to be blown away by the airflow and are periodically cleaned from the impurity discharge port 1605 of the grinding chamber 1604.

[0089] Reference Figure 22In some embodiments of this application, a cyclone collector 18 is provided at the other end of the carbon powder flow pipe 1609. The carbon powder is blown into the cyclone collector 18 by the blower 17, and the tangential airflow causes rotational motion, causing the carbon powder particles with large inertial centrifugal force to be thrown towards the outer wall surface and separated and collected. Specifically, the cyclone collector 18 includes a collector support 1801 made of carbon steel pipe. A second cylinder 1802 and a second conical cylinder 1805 are provided on the collector support 1801. A side inlet 1804 is provided on the side wall of the second cylinder 1802, and an upper outlet 1803 is provided on the top of the second cylinder 1802. The diameter of the second cylinder 1802 is determined after calculation based on the airflow velocity of the side inlet 1804, and the total volume is generally set to 3-4 mm. A second discharger 1806 is installed at the lower part of the second conical cylinder 1805, and a second level sensor 1807 is installed on the second conical cylinder 1805. When the carbon powder particles accumulate to the second level sensor 1807, the second discharger 1806 at the bottom is activated to feed the carbon powder into the sixth feed port 1901 of the vibrating screen 19. Furthermore, in order to adapt to the carbon powder screening speed of the vibrating screen 19 at the rear end, the motor of the second discharger 1806 is equipped with a frequency converter for adjustment; in order to prevent carbon powder from bridging, a small vibrator can be installed on the second conical cylinder 1805 opposite to the second level sensor 1807.

[0090] Reference Figure 22 In some embodiments of this application, the upper outlet 1803 of the cyclone collector 18 is provided with a return air pipe 1701. One end of the return air pipe 1701 is connected to the upper outlet 1803 of the cyclone collector 18, and the other end is connected to the inlet of the induced draft fan 17. The air carrying carbon powder is separated by the rotation of the cyclone collector 18 and then drawn back by the induced draft fan 17 through the return air pipe 1701.

[0091] Reference Figure 22 In some embodiments of this application, an induced draft fan 17 is provided at the other end of the return air pipe 1701. In this embodiment, an air blowing pipe 1702 is provided at the outlet of the induced draft fan 17. One end of the air blowing pipe 1702 is connected to the outlet of the induced draft fan 17, and the other end is connected to the air inlet 1607 of the grinding chamber of the grinding mill 16. The induced draft fan 17 is responsible for blowing the carbon powder ground by the grinding mill 16 to the cyclone collector 18 for separation and drawing back the separated air. The volute and impeller of the induced draft fan 17 are made of wear-resistant carbon steel manganese plate, with a wind pressure >6000pa, an air volume of 8000-15000㎥ / h, a motor power of 22KW / h, and is equipped with a frequency converter for regulation.

[0092] Reference Figure 1 and Figure 23In some embodiments of this application, a vibrating screen 19 is provided below the cyclone collector 18. The outlet of the second unloader 1806 of the cyclone collector 18 is connected to the sixth inlet 1901 of the vibrating screen 19. The second unloader 1806 operates according to set conditions to unload carbon powder into the sixth inlet 1901. The vibrating screen 19 includes a vibrating screen base 1912. Multiple layers of frames 1903 are stacked on top of the vibrating screen base 1912. Each frame 1903 contains screens 1905 of different specifications, with the mesh size of the screens 1905 gradually decreasing from top to bottom. Each frame 1903 is provided with a carbon powder outlet 1904. A dust cover 1902 is provided on the upper part of the vibrating screen 19. The sixth inlet 1901 is located on top of the dust cover 1902. The connection between the dust cover 1902 and the second unloader 1806 is a flexible connection to prevent vibration interference. A vibration motor 1914 is installed inside the vibrating screen base 1912. The vibration motor 1914 drives the upper counterweight 1913 and the lower counterweight 1915 to rotate, and the vibration force is transferred to the upper frame 1903 and the screen 1905. This causes the carbon powder in the frame 1903 to be vibrated and then screened by the screen 1905. The sorted carbon powder flows out from different carbon powder discharge ports 1904 and is then bagged. Furthermore, an isolation spring 1911 is provided between the vibrating screen base 1912 and the frame 1903 to prevent the vibration of the frame 1903 from affecting the vibrating screen base 1912, thus ensuring the stability of the vibrating screen base 1912.

[0093] Reference Figure 1In some embodiments of this application, a dust removal module is also included. Specifically, the dust removal module includes a first ventilation duct 21, a second ventilation duct 22, a ceramic multi-tube dust collector 23, and a bag filter 24. In some embodiments of this application, multiple ventilation pipes 807 are provided on the upper sealing cover 805 of the first scraper conveyor 8 and the second scraper conveyor 10. The ventilation pipes 807 can be located at any position on the horizontal section, arc section, or raised section of the upper sealing cover 805. Each ventilation pipe 807 is provided with an adjustable air valve 20. To prevent burns, an insulation layer is wrapped around the ventilation pipe 807. The ventilation pipes 807 converge into the first ventilation duct 21. The cross-sectional area of ​​the first ventilation duct 21 is larger than the sum of the cross-sectional areas of the branch ventilation pipes 807. The first ventilation duct 21 is connected to the inlet pipe of the ceramic multi-tube dust collector 23. In addition, in some embodiments, the sealed belt conveyor 12 is also equipped with multiple ventilation pipes, which converge to the second ventilation duct 22, which is connected to the inlet pipe of the ceramic multi-tube dust collector 23. The outlet of the ceramic multi-tube dust collector 23 is connected to the inlet of the bag filter 24. The bag filter 24 provides negative pressure and centrifugal force to the ceramic multi-tube dust collector 23. At the same time, by adjusting the opening of the regulating damper 20, under the action of the induced draft fan of the bag filter 24, a controllable negative pressure is generated in the first scraper conveyor 8, the water-cooled crusher 9, the second scraper conveyor 10, the drum-type slag cooler 11, the sealed belt conveyor 12, and the collection hopper 14, thereby sucking away the dust in each device and preventing the hot air from carrying away the dust. Dust generated during the transport of charcoal slag particles by various devices is drawn away by multiple ventilation pipes 807 and ultimately collected in the ceramic multi-tube dust collector 23 for initial purification. The purified air is then filtered and purified again by the bag filter 24 before being discharged, solving the problem of hot air carrying dust during dry slag discharge of biomass charcoal and maintaining a clean working environment. Furthermore, the ceramic multi-tube dust collector 23 serves as a pretreatment device for the bag filter 24, collecting and removing large dust particles drawn from the first ventilation pipe 21 and the second ventilation pipe 22, and cooling the high-temperature gas. Alternatively, by supplementing an appropriate amount of air at the outlet of the ceramic multi-tube dust collector 23, the temperature before entering the bag filter 24 is reduced by below 200°C to prevent damage to the filter bags. The ceramic multi-tube dust collector 23 has multiple built-in cyclone ceramic tubes that can separate and process high-temperature gas, with a designed processing air volume of approximately 12,000 cubic meters per hour. A discharge device is installed at the bottom for intermittent ash discharge. The cross-sectional area of ​​the inlet pipe of the ceramic multi-tube dust collector 23 is larger than the total cross-sectional area of ​​the first ventilation pipe 21 and the second ventilation pipe 22. The configured bag filter dust collector 24 has a processing air volume of >12000㎥ / h, uses high temperature resistant (≤200℃) composite filter bags, and has an outlet dust content of <10mg / ㎥.

[0094] Furthermore, since the surface of biomass raw materials is rich in ash, a certain degree of dust will inevitably be generated when it is transported to the furnace of the gasifier body 3. Under the influence of high-velocity gas, this dust is sucked up and transported along with the biomass gas. Over time, this will inevitably lead to the deposition of some sand and dust in the first gas pipeline 26, the high-temperature induced draft fan 27, and the first gas pipeline 28, directly affecting the flow rate of the biomass gas pipeline or damaging the blades of the high-temperature induced draft fan 27. At the same time, it will also deposit in the downstream boiler or kiln, increasing the load on downstream purification equipment (such as bag filters), eventually requiring shutdown for cleaning, affecting the continuous operation of the equipment, and impacting the enterprise's heat consumption. To solve the above problems, this application installs a biomass gas purification device 25 at the gas outlet 6. (Refer to...) Figures 1 to 3 , Figure 24In some embodiments of this application, the gas outlet 6 is connected to the gas inlet 2508 of the biomass gas purification device 25, which is located above the cooling zone 306 and adjacent to the gasifier body 3. The biomass gas purification device 25 includes a support frame 2503 and a purification chamber 2502. The purification chamber 2502 is made of high-temperature resistant carbon steel plate and reinforcing ribs, and is covered with an insulation layer. The gas inlet 2508 is located on the side wall of the purification chamber 2502. The top of the purification chamber 2502 is provided with an upper clean gas outlet 2501. The lower part of the purification chamber 2502 is provided with a conical barrel 2504. The bottom of the conical barrel 2504 is provided with a third unloader 2505. The lower part of the third unloader 2505 is provided with a discharge bucket 2506. Multiple cyclone ceramic tubes 2507 are installed inside the purification chamber 2502. The cyclone ceramic tubes 2507 are made of alumina ceramic, which has good wear resistance and corrosion resistance. The number of tubes equipped should correspond to the power of the current gasifier equipment. During operation, crude biomass gas is drawn into the cyclone ceramic tube 2507 through the gas inlet 2508. The crude biomass gas is separated and purified within the cyclone ceramic tube 2507. The purified biomass gas is then led out through the upper clean gas outlet 2501 and enters the first gas pipeline 26. The separated dust and debris accumulate in the conical drum 2504. The third unloader 2505 discharges the dust and debris into the discharge bucket 2506, where it falls into the cooling zone 306 and is transported to the downstream end for processing along with the charcoal residue. The biomass gas purification device 25 of this application can operate continuously for extended periods, ensuring the continuous operation of the gasification equipment. Furthermore, the biomass gas undergoing pyrolysis within the gasifier body 3 has a high temperature (380℃-450℃), and this temperature is maintained essentially even after passing through the biomass gas purification device 25. Since the tar is in a gaseous molecular state, it does not affect the separation and purification effect of the crude biomass gas. This design employs high-temperature separation and purification technology, allowing normal operation with biomass gas temperatures exceeding 260℃. During normal operation in a cold furnace state, the required operating temperature is met by preheating the gasifier body 3 and gas pipelines. The separated and purified crude biomass gas is easier to transport and utilize, preventing silt and impurities from clogging the gas pipelines, solving the problem of difficult tar handling, and improving the calorific value of the gas. In contrast, traditional methods of purifying biomass gas by spraying result in condensation at low temperatures, leading to the precipitation of large amounts of difficult-to-dispose-of tar.

[0095] Reference Figure 1 and Figure 3In some embodiments of this application, a first gas pipeline 26 is provided on the upper clean gas outlet 2501 of the biomass gas purification device 25, and a high-temperature resistant induced draft fan 27 is provided at one end of the first gas pipeline 26. One end of the first gas pipeline 26 is connected to the upper clean gas outlet 2501, and the other end is connected to the inlet of the high-temperature resistant induced draft fan 27. The first gas pipeline 26 is usually horizontally installed. If the path needs to be changed to accommodate the installation of the high-temperature resistant induced draft fan 27, an elbow needs to be added. The first gas pipeline 26 is also made of seamless stainless steel to improve its durability. To avoid damage to the high-temperature resistant induced draft fan 27 or its service life caused by high-temperature biomass gas, the length of the first gas pipeline 26 is generally set to more than eight meters, but not exceeding 15 meters. Due to the relatively long length of the first gas pipeline 26, a bracket needs to be installed below the first gas pipeline 26 for support. An arc-shaped roller is installed at the contact point between the bracket and the first gas pipeline 26 for support. The arc of the arc-shaped roller needs to match the arc of the outer diameter of the pipeline to protect the pipe wall of the first gas pipeline 26. Limiting posts are installed on the brackets on both sides of the first gas pipeline 26 to prevent displacement caused by thermal expansion and contraction. In some embodiments, a stainless steel expansion joint is also installed at the connection end between the first gas pipeline 26 and the high-temperature induced draft fan 27 to prevent thermal expansion and contraction of the first gas pipeline 26 from affecting the normal operation of the high-temperature induced draft fan 27; in addition, a stainless steel expansion joint is installed every 5-6 meters in the middle section of the first gas pipeline 26 to eliminate thermal stress and compensation for thermal expansion and contraction. After the first gas pipeline 26 is installed and fixed, it is wrapped with ceramic fiber blanket for insulation, and the outer shell of the insulation layer is wrapped with stainless steel, and the surface temperature of the outer shell is controlled below 50°C.

[0096] Reference Figure 1 and Figure 3In some embodiments of this application, a high-temperature resistant induced draft fan 27 is installed at the end of the first gas pipeline 26. The high-temperature resistant induced draft fan 27 is installed on a stable ground or platform. The inlet end of the high-temperature resistant induced draft fan 27 is connected to the first gas pipeline 26, and the outlet of the high-temperature resistant induced draft fan 27 is provided with a second gas pipeline 28. One end of the second gas pipeline 28 is connected to the outlet of the high-temperature resistant induced draft fan 27, and the other end is connected to the gas inlet of the biomass gas burner 31. A short section of the second gas pipeline 28 is installed vertically at the outlet of the high-temperature resistant induced draft fan 27, and then a bend is added to make the second gas pipeline 28 horizontal. Usually, a passage space of more than two meters is reserved below the second gas pipeline 28. The second gas pipeline 28 is a seamless stainless steel pipe, and the total length of the second gas pipeline 28 generally does not exceed 25 meters. It is conceivable that a bracket is also provided below the second gas pipeline 28, and the bracket structure is similar to that of the bracket of the first gas pipeline 26. In addition, stainless steel expansion joints must be installed at the outlet connection between the second gas pipeline 28 and the high-temperature induced draft fan 27, as well as at the inlet connection between the second gas pipeline 28 and the biomass gas burner 31, to prevent the thermal expansion and contraction of the second gas pipeline 28 from affecting the normal operation of the high-temperature induced draft fan 27 and the safe use of the biomass gas burner 31. A stainless steel expansion joint is installed every 6 meters along the middle section of the second gas pipeline 28 to eliminate thermal stress and compensate for thermal expansion and contraction. After the second gas pipeline 28 is installed and fixed, it also needs to be wrapped with ceramic fiber blankets for insulation. A stainless steel insulation outer shell is installed outside the ceramic fiber blankets, and the surface temperature of the outer shell is controlled below 50℃.

[0097] Reference Figure 1 and Figure 3 In some embodiments of this application, a biomass gas burner 31 is installed at the end of the second gas pipeline 28. The biomass gas burner 31 is matched with the power of the biomass gasification furnace and is fixed on the heated boiler (or kiln) according to the normal installation method. The biomass gas burner 31 is a dedicated biomass gas combustion burner. The biomass gas burner 31 is equipped with a programmable controller, a flame detector, an ignition gun, and a blower. It can safely and stably burn low-calorific-value biomass gas, and the load adjustment range is 25%-100%. The performance of the biomass gas burner 31 meets the national standards for oil (gas) burners.

[0098] Reference Figure 1 and Figure 3In some embodiments of this application, a shut-off valve 30 is provided on the second gas pipeline 28 at the front end of the biomass gas burner 31. The shut-off valve 30 can completely cut off the flow of the second gas pipeline 28 to cut off the biomass gas supply to the biomass gas burner 31 when necessary. It is generally used in emergency situations or maintenance situations of the biomass gas burner 31. The shut-off valve 30 is a gas-specific valve, which is required to have high temperature resistance and the manufacturing process and inspection must meet national standards. Furthermore, as a precaution, two shut-off valves 30 are usually installed in series on the second gas pipeline 28. The two shut-off valves 30 operate synchronously to ensure that the biomass gas supply to the second gas pipeline 28 can be completely cut off when needed. Furthermore, in some embodiments of this application, a venting device 29 is also provided on the second gas pipeline 28 at the front end of the shut-off valve 30. The venting device 29 is a branch pipeline on the second gas pipeline 28. The venting device 29 includes a venting pipe 2901, and a venting shut-off valve 2902 is provided at the end of the venting pipe 2901. The venting shut-off valve 2902 is a gas-specific valve, which is required to have high temperature resistance, and the manufacturing process and inspection must comply with national standards. A venting exhaust pipe 2904 is provided above the venting shut-off valve 2902. The venting exhaust pipe 2904 is fitted into the gas outlet end of the venting shut-off valve 2902 and installed and fixed. A rainproof cover is installed at a distance of 1 meter from the upper exhaust outlet to prevent water ingress. A venting ignition gun 2903 is installed on the venting exhaust pipe 2904 at an angle of 20-30° upwards. The flare ignition gun 2903 has a power of ≥90KW / h and uses liquefied coal gas to ignite the flared biomass gas. The flare ignition gun 2903 is equipped with a power supply, compressed air, programmable controller, transformer, high-voltage ignition electrode, solenoid valve, and flame detector, enabling automatic ignition. When the biomass gas burner 31 detects flame extinguishing or an emergency shutdown due to equipment failure, the control system of the biomass gasification furnace instructs the high-temperature induced draft fan 27 to reduce its load, activates the shut-off valve 30 to cut off the gas supply from the second gas pipeline 28 to the biomass gas burner 31, and simultaneously opens the flare shut-off valve 2902 to flare the biomass gas. The flare ignition gun 2903 ignites the flared biomass gas. The high-temperature hot gas generated during combustion draws air into the flare exhaust pipe 2904 through self-suction, allowing the air to mix and burn with the biomass gas. This avoids environmental pollution from flue gas and reduces the risk of deflagration, ensuring production safety.

[0099] The biomass raw material deep processing system of this application effectively processes the remaining char residue while generating biomass gas, facilitating subsequent utilization. This system solves the problems of high processing costs and low utilization value resulting from wet quenching of char residue in traditional biomass gasification furnaces; the difficulties and low efficiency of dry quenching of biomass char; the problem of dust carried by hot gas during dry biomass char transportation; the environmental hazards caused by direct landfilling of low-value biomass char residue; the wear and tear on high-temperature induced draft fans and biomass gas burners caused by the high impurities carried by the direct utilization of crude biomass gas after gasification; and the blockage of biomass gas pipelines caused by the high impurities carried by the direct utilization of crude biomass gas after gasification. This invention addresses the problem of impurities in the raw biomass gas after gasification, which cause wear on boiler tube bundles (or membrane walls) due to direct utilization of the raw biomass gas. It also solves the problem of boiler (or kiln) accumulating impurities and requiring shutdown for cleaning. Under the premise of ensuring continuous and safe operation of the equipment, it processes unusable biomass char residue into valuable char powder, breaking through the traditional problem of not being able to continuously process char residue on-site. This deepens the utilization of biomass energy, realizes automated production of biomass gas and char powder co-production, and achieves the goals of energy conservation, emission reduction, and improved environmental and economic benefits.

[0100] It is understood that the above embodiments only illustrate preferred embodiments of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this application. It should be noted that, for those skilled in the art, without departing from the concept of this application, the above technical features can be freely combined, and several modifications and improvements can be made, all of which fall within the protection scope of this application. Therefore, all equivalent transformations and modifications made within the scope of the claims of this application should fall within the coverage of the claims of this application.

Claims

1. A biomass raw material deep processing system, characterized in that, include: Water-cooled chain grate (4), the water-cooled chain grate (4) includes a chain web (404) for conveying biomass raw materials and charcoal slag along a first horizontal direction, and the lower part of the chain web (404) is provided with several adjustable ventilation windows (401). A sealed feeder (1) and a water-cooled screw feeder (2) are provided. The water-cooled screw feeder (2) includes a main shaft (201) that spans above the water-cooled chain grate (4) in a second horizontal direction. The second horizontal direction is perpendicular to the first horizontal direction. The main shaft (201) is provided with screw blades (203) for pushing biomass raw materials. The sealed feeder (1) is located above the water-cooled screw feeder (2). The sealed feeder (1) transports the biomass raw materials to the water-cooled screw feeder (2), and the water-cooled screw feeder (2) arranges the biomass raw materials on the upper surface of the chain web (404) in the second horizontal direction. The gasifier body (3) is located above the water-cooled chain grate (4). The gasifier body (3) is used to heat and burn the biomass raw materials transported on the chain grate (404) to generate biomass gas. The adjustable ventilation window (401) is located within the range of the gasifier body (3). Outside air enters the biomass raw materials on the chain grate (404) through the adjustable ventilation window (401) to help combustion. The top of the gasifier body (3) is provided with a gas outlet (6). The rear of the gasifier body (3) is provided with a slag discharge port (305). The char slag formed after the biomass raw materials are burned and gasified is discharged from the slag discharge port (305) along the first horizontal direction. The water-cooled chain grate (4) is equipped with a first scraper conveyor (8), a water-cooled crusher (9), a second scraper conveyor (10), a drum-type slag cooler (11), a sealed belt conveyor (12), a hopper (14), a U-shaped screw feeder (15), a grinding mill (16), a cyclone collector (18), and a vibrating screen (19) at its end. The char slag formed after the biomass raw material is burned and gasified is transported by the first scraper conveyor (8) to the water-cooled crusher (9) for crushing. The carbon slag particles are conveyed by the second scraper conveyor (10) to the drum-type slag cooler (11) for cooling. After cooling, the carbon slag particles pass through the sealed belt conveyor (12), the collection hopper (14) and the U-shaped screw feeder (15) in sequence and enter the grinding mill (16) to be ground into carbon powder. The carbon powder is collected by the cyclone collector (18) and conveyed to the vibrating screen (19). The carbon powder is vibrated and screened in the vibrating screen (19) and then output and bagged.

2. The biomass raw material deep processing system as described in claim 1, characterized in that, The biomass raw material deep processing system also includes a dust removal module, which includes a first ventilation duct (21), a second ventilation duct (22), a ceramic multi-tube dust collector (23), and a bag dust collector (24). Ventilation pipes (807) are respectively provided on the first scraper conveyor (8), the second scraper conveyor (10) and the sealed belt conveyor (12). The ventilation pipes (807) converge on the first ventilation duct (21) or the second ventilation duct (22). The first ventilation duct (21) and the second ventilation duct (22) are respectively connected to the ceramic multi-tube dust collector (23). The output port of the ceramic multi-tube dust collector (23) is connected to the bag dust collector (24).

3. The biomass raw material deep processing system as described in claim 1, characterized in that, An induced draft fan (17) is provided between the grinding mill (16) and the cyclone collector (18). The induced draft fan (17) is connected to the grinding mill (16) and the cyclone collector (18) respectively. The induced draft fan (17) provides circulating air to blow the carbon powder in the grinding mill (16) to the cyclone collector (18) for collection.

4. The biomass raw material deep processing system as described in claim 1 or 2, characterized in that, The sealed belt conveyor (12) is equipped with a magnetic iron remover (13).

5. The biomass raw material deep processing system as described in claim 1, characterized in that, The gas outlet (6) is connected in sequence to a first gas pipeline (26), a high-temperature induced draft fan (27), and a second gas pipeline (28). A biomass gas burner (31) is installed at the end of the second gas pipeline (28).

6. The biomass raw material deep processing system as described in claim 5, characterized in that, A biomass gas purification device (25) is provided between the gas outlet (6) and the first gas pipeline (26). When the biomass gas generated by the gasifier body (3) passes through the biomass gas purification device (25), the biomass gas is purified and dust is separated by the biomass gas purification device (25).

7. The biomass raw material deep processing system as described in claim 5, characterized in that, The second gas pipeline (28) is equipped with a shut-off valve (30) and a venting device (29). Along the direction of gas delivery, the shut-off valve (30) is located behind the venting device (29).

8. The biomass raw material deep processing system as described in claim 1, characterized in that, The gasifier body (3) is composed of a water-cooled base (301), a composite furnace body (302), and a water-cooled furnace top (303). The water-cooled base (301), the composite furnace body (302), the water-cooled furnace top (303), and the chain spokes (404) together define the furnace chamber of the gasifier body (3).

9. The biomass raw material deep processing system as described in claim 1 or 8, characterized in that, The gasifier body (3) is provided with a cooling zone (306) at the rear. The char slag discharged from the slag discharge port (305) enters the cooling zone (306) for cooling. A heat recovery unit (307) is provided above the cooling zone (306).

10. The biomass raw material deep processing system as described in claim 1, characterized in that, The sealed feeder (1) includes a feed cylinder (101), and an upper valve plate (103) and a lower valve plate (102) are provided inside the feed cylinder (101). A material retention area is defined between the upper valve plate (103) and the lower valve plate (102). The upper valve plate (103) and the lower valve plate (102) work alternately by opening and closing.

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