Intelligent control system for gas and carbon production in biomass gasification

Abstract

The application discloses a biomass gasification gas and carbon production intelligent regulation and control system, which comprises a front-end processing system, a gasification furnace, an air inlet system, a hot steam system and a controller. The controller regulates and controls the operation of the biomass gasification gas and carbon production intelligent regulation and control system, rapidly responds to the change of user end demand, and safely and efficiently utilizes the fuel gas and biomass carbon generated by biomass gasification.

Description

Technical Field

[0001] This invention relates to an intelligent control system for biomass gasification and char production. Background Technology

[0002] Biomass gasification produces high-temperature fuel gas. This high-temperature fuel gas is then burned in a boiler to produce steam. The steam is then supplied to users (such as some industrial enterprises).

[0003] Chinese invention patent CN103939880B proposes an adaptive intelligent control method for a biomass gasification thermal energy conversion system. The purpose of the control method is to ensure stable outlet steam pressure and flow rate.

[0004] In real-world applications, users' demands for outlet steam pressure and flow rate are dynamic and require rapid response to these changes, while ensuring safe and stable continuous operation. Summary of the Invention

[0005] This invention provides an intelligent control system for biomass gasification and char production.

[0006] The technical solution of the present invention is as follows: a biomass gasification gasification and char production intelligent control system, comprising a front-end processing system, a gasifier, an air intake system, a hot steam system, and a controller;

[0007] The front-end processing system is used to receive and pulverize biomass. The gasifier includes a gasification chamber, an ash chamber, a temperature sensor, a pressure sensor, an oxygen sensor, and a cooling water system. The gasification chamber is located above the ash chamber, and the on / off relationship between the two is controlled by the controller. The gasification chamber is used to receive biomass and perform pyrolysis gasification reaction on the biomass to obtain fuel gas and biochar. The ash chamber is used to receive biochar. The temperature sensor is used to detect the temperature inside the gasification chamber. The pressure sensor is used to detect the gas pressure inside the gasification chamber. The oxygen sensor is used to detect the oxygen content inside the gasification chamber. The cooling water system is used to cool the biochar in the ash chamber by means of heat exchange.

[0008] The hot steam system is used to receive the gas generated by the gasifier, burn it to heat water to obtain hot steam for user use, and the air intake system is used to supply air to the gasifier.

[0009] The controller is configured as follows:

[0010] In response to the increased demand for hot steam, the air volume delivered by the air intake system is increased; if the oxygen content and pressure in the gasification chamber remain within the preset normal range after the air volume is increased, the feeding of the gasification chamber is started within a preset time after the air volume is increased. During the feeding process, the air intake system is controlled to stop supplying air, and then the feeding is intermittent to keep the reaction going.

[0011] In response to the decrease in the demand for hot steam, the air volume delivered by the air intake system is reduced; if the oxygen content and pressure in the gasification chamber remain within the preset normal range after the air volume is reduced, the feeding of the gasification chamber is started within a preset time after the air volume is reduced. During the feeding process, the air intake system is controlled to stop supplying air, and then the feeding is intermittent to keep the reaction going.

[0012] In response to the temperature in the gasification chamber exceeding a preset upper temperature threshold, the air supply system is controlled to stop supplying air, the cooling water system is started, the ash chamber is controlled to receive biochar, and after the temperature in the gasification chamber drops to a preset lower temperature threshold, the cooling water system is stopped, the connection channel between the ash chamber and the gasification chamber is closed, and the air supply system is controlled to start supplying air.

[0013] Optionally, the gasifier further includes a first level gauge and a second level gauge. The first level gauge is used to detect whether the height of the biomass in the gasification chamber has reached an upper limit threshold, and the second level gauge is used to detect whether the height of the biomass in the gasification chamber has reached a lower limit threshold. The controller is further configured to:

[0014] Feeding into the gasification chamber is initiated in response to the biomass height in the gasification chamber decreasing to the lower height threshold; feeding into the gasification chamber is stopped in response to the biomass height in the gasification chamber rising to the upper height threshold.

[0015] With this setup, the amount of biomass in the gasification chamber is kept within a reasonable range during the pyrolysis and gasification reaction.

[0016] Optionally, the cooling water system is configured to increase the water flow rate when the temperature of the cooling water flowing out of the ash chamber is greater than a set value, and decrease the water flow rate when the temperature of the cooling water flowing out of the ash chamber is less than the set value.

[0017] This setup ensures the effective cooling of the biochar.

[0018] Optionally, the gasifier further includes an explosion relief device connected to the gasification chamber, and the controller is further configured to: control the air intake system to stop supplying air to the gasification chamber in response to the gas pressure in the gasification chamber being greater than a preset negative upper limit threshold, and start the air intake system in response to the gas pressure in the gasification chamber dropping to a preset negative upper limit threshold.

[0019] If the gas pressure in the vaporization chamber increases to a positive critical pressure, the explosion relief system will automatically activate.

[0020] This design ensures the safe operation of the gasifier.

[0021] Optionally, a screw conveyor is connected to the bottom flange of the ash chamber, the screw conveyor being used to receive biochar from the ash chamber and transfer the received biochar.

[0022] Optionally, the gasifier further includes a second hopper, a first valve disposed above and connected to the second hopper, and a second valve disposed below and connected to the second hopper. The first valve is used to control the connection between the second hopper and the feed pipe, and the second valve is used to control the connection between the second hopper and the gasification chamber. The feed pipe is connected to the front-end processing system.

[0023] This design prevents gas from escaping from the gasification chamber during the feeding process in the gasifier.

[0024] Optionally, it also includes a flue gas purification system for purifying the exhaust gas generated by combustion within the hot steam system.

[0025] Optionally, it also includes a flue gas emission system for discharging the purified flue gas into the atmosphere.

[0026] Optionally, the hot steam system includes a boiler and a water system, wherein the boiler is used to burn fuel gas and heat water supplied to the water system.

[0027] Optionally, the front-end processing system is completely sealed to prevent dust from spilling into the factory.

[0028] The intelligent control system for biomass gasification and char production can quickly respond to changes in user demand for heat steam, ensuring safe and efficient continuous operation of the gas and char production processes. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the intelligent control system for biomass gasification and char production of the present invention.

[0030] Figure 2 This is a schematic diagram of the gasification furnace of the present invention.

[0031] The attached diagram is labeled as follows: 1. Front-end processing system; 11. First silo; 12. Belt conveyor; 13. Crusher; 2. Gasifier; 21. Biochar; 3. Hot steam system; 31. Boiler; 32. Water system; 4. Flue gas purification system; 41. Denitrification system; 42. Dust removal system; 5. Flue gas emission system; 51. Exhaust fan; 52. Chimney; 6. Controller; 7. Air intake system; 71. Primary air intake; 72. Central air intake; 200. Feed pipe; 22. 23. First valve; 24. Second hopper; 251. First oxygen sensor; 252. Second oxygen sensor; 26. Explosion relief device; 261. First pressure sensor; 262. Second pressure sensor; 271. First level gauge; 272. Second level gauge; 281 to 289. First temperature sensor to ninth sensor; 29. ​​Movable base plate; 201 to 203. First flow meter to third flow meter; 2a. Screw conveyor; 2b. Electric valve. Detailed Implementation

[0032] The present invention will be further described below with reference to specific embodiments, but the scope of protection of the present invention is not limited thereto.

[0033] Figure 1 This is a schematic diagram of the intelligent control system for biomass gasification and char production of the present invention. Figure 2 This is a schematic diagram of the gasification furnace of the present invention.

[0034] refer to Figure 1 The intelligent control system for biomass gasification and char production includes: a front-end processing system 1, a gasifier 2, a hot steam system 3, a flue gas purification system 4, a flue gas emission system 5, an air intake system 7, and a controller 6.

[0035] The front-end processing system 1 receives biomass and crushes it. Specifically, the front-end processing system 1 includes a first silo 11, a belt conveyor 12, and a crusher 13. The first silo 11 receives biomass, and its outlet is connected to the belt conveyor 12 via a conveying pipe. The outlet of the belt conveyor 12 is connected to the crusher 13. The front-end processing system 1 is completely sealed to prevent dust from spilling into the plant.

[0036] The discharge port of crusher 13 is connected to a conveying pipe (e.g., is Figure 2 The feed pipe 200 is connected to the feed inlet of the gasifier 2. The biomass char 21 produced by biomass gasification is discharged from the bottom discharge port of the gasifier 2. The discharge port of the gasifier 2 is connected to the inlet of the screw conveyor 2a through a conveying pipe. The outlet of the screw conveyor 2a is connected to the biomass char bin (not shown, used for storing biomass char).

[0037] The feed inlet of gasifier 2 is located at the top of gasifier 2. Air supply system 7 supplies air to gasifier 2. An air inlet is located at the bottom of gasifier 2, and an internal air supply pipe connects to the air inlet, transporting air to the biomass high-temperature gasification zone (gasification chamber). In this embodiment, there are two air inlets: a first air inlet located on the bottom side surface of gasifier 2, and a second air inlet located on the bottom surface of gasifier 2. The air supplied by air supply system 7 is divided into two paths: primary air supply 71 enters the first air inlet, and central air supply 72 enters the second air inlet. The primary air supply 71 and central air supply 72 are approximately proportional. This facilitates a more uniform distribution of oxygen in the air within the biomass high-temperature gasification zone of gasifier 2.

[0038] The connection method between the air intake system 7 and the gasifier 2 is not limited to this. For example, the gasifier 2 may only have one air inlet at the bottom.

[0039] The gas produced by gasifier 2 is discharged into hot steam system 3, where it burns and releases heat to heat water, thereby producing hot steam. The hot steam is then transported to the user end.

[0040] The demand for steam from users is not constant; the demand varies at different times. The intelligent control system for biomass gasification and char production provides steam in several different increments.

[0041] The hot steam system 3 includes a boiler 31 and a water system 32. Gas is burned in the boiler 31, and the water system 32 supplies water to be heated to the boiler 31. The water is heated in the boiler 31 to produce hot steam.

[0042] The flue gas produced after combustion of the gas is discharged into the flue gas purification system 4. The flue gas purification system 4 purifies the flue gas. The flue gas purification system 4 includes a denitrification system 41 and a dust removal system 42. The denitrification system 41 removes nitrogen oxides from the flue gas. The dust removal system 42 removes particulate matter from the flue gas. The denitrification system 41, for example, uses selective catalytic reduction (SCR) for denitrification. The dust removal system 42, for example, includes a bag filter.

[0043] The flue gas purification system 4 discharges the purified flue gas into the flue gas emission system 5. The flue gas emission system 5 includes an induced draft fan 51 and a chimney 52. ​​The induced draft fan 51 draws the flue gas to the bottom of the chimney 52, and the flue gas enters the atmosphere from the top of the chimney 52.

[0044] The controller 6 regulates the operation of the front-end processing system 1, the gasifier 2, the hot steam system 3, the flue gas purification system 4, and the flue gas emission system 5.

[0045] Figure 2 middle Indicates flange connection, Indicates a water pump. Indicates an electric actuator. Indicates an expansion joint. Indicates butterfly valve. Indicates a ball valve. Indicates a check valve. Indicates centrifugal fan, These represent filters. Their connection method is common knowledge in the field and will not be described in detail.

[0046] refer to Figure 2 The upper part of the gasifier 2 is connected to the feed pipe 200. The feed pipe 200 receives the crushed biomass. The feed pipe 200 is connected to the second silo 23 through the first valve 22. The bottom of the second silo 23 is connected to the second valve 24.

[0047] During the feeding operation, firstly, the first valve 22 is opened and the second valve 24 is closed, allowing biomass to enter the second hopper 23 through the first valve 22. Subsequently, the first valve 22 is closed and the second valve 24 is opened, allowing the biomass to enter the gasifier 2 by gravity.

[0048] The first oxygen sensor 251 and the second oxygen sensor 252 are redundant and are used to detect the oxygen content inside the gasifier 2. The first oxygen sensor 251 and the second oxygen sensor 252 are communicatively connected to the controller 6. The controller 6 uses the average value of the two sensors for system regulation.

[0049] The explosion relief device 26 is connected to the furnace body of the gasifier 2 via a flange connection. When the gas pressure inside the gasifier 2 exceeds a set safety threshold, the explosion relief device 26 automatically opens to release the gas inside the furnace, ensuring the safe operation of the gasifier 2. The explosion relief device 26 is, for example, an explosion-proof valve.

[0050] Flange connection refers to connecting two things using a flange.

[0051] Continue to refer to Figure 2 The top of the gasifier 2 is also connected to an electric valve 2b via a flange, which serves as an emergency discharge port and is normally closed.

[0052] The first pressure sensor 261 and the second pressure sensor 262 are used to detect the gas pressure inside the gasification chamber of the gasifier 2. Each of them is connected to the gasification chamber through a check valve.

[0053] The first level gauge 271 and the second level gauge 272 are at different heights (due to space limitations on the drawing, they are drawn at the same height) and are used to detect the height of biomass inside the gasifier 2. For example, the first level gauge 271 may be located above the second level gauge 272, or the first level gauge 271 may be located below the second level gauge 272.

[0054] In an embodiment of the present invention, the first level gauge 271 is used to detect whether the height of biomass in the gasification chamber has reached the upper limit threshold, the second level gauge 272 is used to detect whether the height of biomass in the gasification chamber has reached the lower limit threshold, and the controller is further configured to:

[0055] Feeding into the gasification chamber is initiated when the height of the biomass in the gasification chamber decreases to the lower height threshold; feeding into the gasification chamber is stopped when the height of the biomass in the gasification chamber rises to the upper height threshold.

[0056] The feeding process is automated, ensuring that there is always an appropriate amount of biomass in the gasification chamber.

[0057] The first level gauge 271 and the second level gauge 272 mentioned above are, for example, rotary paddle level gauges. They detect the material height based on the change in resistance experienced by the rotating blades as they rotate within the material. Their working principle involves a motor driving a reducer to rotate the blades within the material hopper. When the blades are not in contact with the material, the rotational resistance is low, and the blades can rotate normally; however, when the blades come into contact with the material, the rotational resistance increases, causing the blade speed to decrease or stop. By detecting the change in blade speed, the controller can calculate the material height.

[0058] Temperature sensors 281 to 288 are paired, with each pair of sensors at the same height, and are used to detect the temperature at different heights within the gasifier 2. In this embodiment, the controller 6 uses the detection data from the second temperature sensor 282 and the sixth temperature sensor 286 for system regulation, while the detection data from the remaining temperature sensors are reserved.

[0059] The ninth temperature sensor 289 is used to detect the temperature of the gas discharged into the boiler 31.

[0060] The movable bottom plate 29 is opened or closed in a controlled manner. When the movable bottom plate 29 is opened, the biomass char 21 produced during the biomass gasification process will enter the ash chamber at the bottom of the gasifier 2.

[0061] A pipe is installed inside the ash chamber to supply cooling water. The cooling water exchanges heat with the biochar 21 within the ash chamber, thereby cooling the biochar 21. A third flow meter 203 is installed on the pipe after the cooling water flows out of the ash chamber. The third flow meter 203 is used to detect the flow rate of the cooling water. A cooling tower is used to cool the cooling water.

[0062] Two centrifugal fans respectively draw central air intake 72 and primary air intake 71 to gasifier 2. First flow meter 201 is used to detect the flow rate of central air intake 72, and second flow meter 202 is used to detect the flow rate of primary air intake 71.

[0063] Biochar 21 enters screw conveyor 2a through a conveying pipe. Screw conveyor 2a discharges biochar 21 into a char bin.

[0064] When gasifier 2 is operating normally, the gas pressure inside gasifier 2 is negative, ranging from -100 to -30 Pa (-100 to -30 Pa is the reading of a vacuum gauge; when the vacuum gauge reading is -100 Pa, the lower limit threshold of the gas pressure is reached, and when the vacuum gauge reading is -30 Pa, the upper limit threshold of the gas pressure is reached; the range may vary slightly for different gasifiers 2). When the pressure sensor detects that the relative vacuum degree inside gasifier 2 is greater than -30 Pa, the air supply system 7 stops supplying air to gasifier 2. Subsequently, the oxygen content inside gasifier 2 is monitored in real time. If the oxygen content is within the preset normal range (e.g., 25% to 30%), the gas pressure inside gasifier 2 is allowed to return to the normal range. If the oxygen content is lower than the lower limit threshold of the normal range, no action is taken. When the oxygen content is greater than the upper limit threshold of the normal range, the air supply is stopped again, and the gasifier 2 is allowed to return to the normal range. If the relative vacuum level inside the gasifier 2 remains above -30 Pa and gradually increases over time to a positive critical pressure (e.g., above atmospheric pressure by 100 Pa), the explosion relief device 26 automatically activates to perform a pressure relief operation. The air supply system 7 remains shut off until the gas pressure inside the gasifier 2 returns to the normal range.

[0065] The temperature sensor, water pump (controlling the flow of cooling water), and control motor (carbon discharge motor) of the movable base plate 29 are interlocked. The water pump is frequency-controlled. The temperature is higher closer to the bottom of the gasification chamber of the gasifier 2. In this embodiment, the detection values ​​of the second temperature sensor 282 and the sixth temperature sensor 286 are selected. When the temperature values ​​detected by the two sensors are lower than the lower limit threshold of the preset temperature range (e.g., 400 to 1200°C), the screw conveyor 2a performs carbon discharge operation. During the carbon discharge operation, the air supply system 7 stops supplying air to the gasifier 2. During the carbon discharge operation, the water pump starts working to cool the biomass char 21 in the ash chamber. When the detected temperatures of the second temperature sensor 282 and the sixth temperature sensor 286 reach the carbon discharge termination temperature (e.g., around 400°C), if the temperature is too low, the chemical reaction in the gasifier 2 cannot proceed. The screw conveyor 2a stops running, the water pump stops running, and the air supply system 7 starts supplying air. A temperature sensor is installed on the cooling water pipeline. When the cooling water temperature exceeds the set value, the water pump increases the cooling water flow rate until the cooling water temperature falls below the set value, at which point the flow rate returns to normal. Note: The screw conveyor 2a and the carbon discharge motor start and stop synchronously.

[0066] When the user's steam demand increases, the frequency of the fan in the air intake system 7 increases. While increasing the air supply to the gasifier 2, the oxygen content and pressure of the gasifier 2 are monitored. If the pressure and oxygen content are within the normal range (e.g., relative vacuum of -100 to -30 Pa, oxygen content of 25% to 30%), then feed is added to the gasifier 2 within a preset time after the air intake is increased. During the feeding process, the air intake system 7 stops supplying air. The level of the first level gauge 271 is higher than that of the second level gauge 272 (…). Figure 2 (Due to limited space, both are drawn at the same height). When the second level gauge 272 indicates a reading, feeding is initiated. When the first level gauge 271 indicates a reading, feeding is stopped. The biomass inside the gasifier 2 is maintained within the preset level range.

[0067] Due to the increased air supply, the reaction inside the gasifier 2 accelerates, generating more fuel gas. When the temperature values ​​detected by the second temperature sensor 282 and the sixth temperature sensor 286 reach the maximum value of the carbon discharge temperature range set by the system, the controller 6 initiates the carbon discharge operation. During the carbon discharge process, the air intake system 7 stops supplying air, and the cooling water pump starts circulating cooling water. When the temperatures of the second temperature sensor 282 and the sixth temperature sensor 286 reach the carbon discharge termination temperature (e.g., 400°C), the screw conveyor 2a stops operating, the cooling water pump stops operating, and the air intake duct starts supplying air.

[0068] When the user's steam demand decreases, the controller 6 controls the air intake system 7 to reduce the air intake, which slows down the reaction in the gasifier 2 and reduces the amount of gas generated.

[0069] While reducing the air supply to gasifier 2, the oxygen content and pressure of gasifier 2 are monitored. If the pressure and oxygen content are within the normal range (e.g., relative vacuum of -100 to -30 Pa, oxygen content of 25% to 30%), then feed is added to gasifier 2 within a preset time after reducing the air supply. During the feeding process, the air supply system 7 stops supplying air. The level of the first level gauge 271 is higher than that of the second level gauge 272 ( Figure 2 (Due to limited space, both are drawn at the same height). When the second level gauge 272 indicates a reading, feeding is initiated. When the first level gauge 271 indicates a reading, feeding is stopped. The biomass inside the gasifier 2 is maintained within the preset level range.

[0070] When the temperature detected by the second temperature sensor 282 and the sixth temperature sensor 286 reaches the minimum value of the carbon discharge set temperature range (e.g., 400℃), the controller 6 initiates the carbon discharge operation. During the carbon discharge operation, the air intake system 7 stops supplying air, and the cooling water pump starts operating. When the temperature detected by the second temperature sensor 282 and the sixth temperature sensor 286 reaches the carbon discharge termination temperature (e.g., 400℃), the screw conveyor 2a stops operating, the air intake system 7 starts supplying air, and the cooling water pump stops operating.

[0071] The controller 6 collects data from various sensors, enabling the biomass gasification process to operate automatically. It can respond quickly to changes in user needs, and the gas production and char production processes can operate safely and efficiently.

[0072] The various embodiments in this invention are described in a progressive manner. For the same or similar parts between the various embodiments, please refer to each other. Each embodiment focuses on describing the differences from other embodiments.

[0073] The scope of protection of this invention is not limited to the embodiments described above. Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its scope and spirit. If these modifications and variations fall within the scope of the claims of this invention and their equivalents, then the intent of this invention also includes these modifications and variations.

Claims

1. A smart control system for biomass gasification and char production, characterized in that, This includes a front-end processing system, a gasifier, an air intake system, a hot steam system, and a controller; The front-end processing system is used to receive and pulverize biomass. The gasifier includes a gasification chamber, an ash chamber, a temperature sensor, a pressure sensor, an oxygen sensor, and a cooling water system. The gasification chamber is located above the ash chamber, and the on / off relationship between the two is controlled by the controller. The gasification chamber is used to receive biomass and perform pyrolysis gasification reaction on the biomass to obtain fuel gas and biochar. The ash chamber is used to receive biochar. The temperature sensor is used to detect the temperature inside the gasification chamber. The pressure sensor is used to detect the gas pressure inside the gasification chamber. The oxygen sensor is used to detect the oxygen content inside the gasification chamber. The cooling water system is used to cool the biochar in the ash chamber by means of heat exchange. The hot steam system is used to receive the gas generated by the gasifier, burn it to heat water to obtain hot steam for user use, and the air intake system is used to supply air to the gasifier. The controller is configured as follows: In response to the increased demand for hot steam, the air volume delivered by the air intake system is increased; if the oxygen content and pressure in the gasification chamber remain within the preset normal range after the air volume is increased, the feeding of the gasification chamber is started within a preset time after the air volume is increased. During the feeding process, the air intake system is controlled to stop supplying air, and then the feeding is intermittent to keep the reaction going. In response to the decrease in the demand for hot steam, the air volume delivered by the air intake system is reduced; if the oxygen content and pressure in the gasification chamber remain within the preset normal range after the air volume is reduced, the feeding of the gasification chamber is started within a preset time after the air volume is reduced. During the feeding process, the air intake system is controlled to stop supplying air, and then the feeding is intermittent to keep the reaction going. In response to the temperature in the gasification chamber exceeding a preset upper temperature threshold, the air supply system is controlled to stop supplying air, the cooling water system is started, the ash chamber is controlled to receive biochar, and after the temperature in the gasification chamber drops to a preset lower temperature threshold, the cooling water system is stopped, the connection channel between the ash chamber and the gasification chamber is closed, and the air supply system is controlled to start supplying air. The gasifier further includes a first level gauge and a second level gauge. The first level gauge is used to detect whether the height of the biomass in the gasification chamber has reached an upper limit threshold, and the second level gauge is used to detect whether the height of the biomass in the gasification chamber has reached a lower limit threshold. The controller is further configured to: Feeding into the gasification chamber is initiated in response to the biomass height in the gasification chamber decreasing to the lower height threshold; feeding into the gasification chamber is stopped in response to the biomass height in the gasification chamber rising to the upper height threshold.

2. The intelligent control system for biomass gasification and char production according to claim 1, characterized in that, The cooling water system is configured to increase the water flow rate when the temperature of the cooling water flowing out of the ash chamber is greater than a set value, and then decrease the water flow rate when the temperature of the cooling water flowing out of the ash chamber is less than the set value.

3. The intelligent control system for biomass gasification and char production according to claim 1, characterized in that, The gasifier also includes an explosion relief device connected to the gasification chamber, and the controller is further configured to: control the air intake system to stop supplying air to the gasification chamber in response to the gas pressure in the gasification chamber being greater than a preset negative upper limit threshold, and start the air intake system in response to the gas pressure in the gasification chamber dropping to a preset negative upper limit threshold. If the gas pressure in the vaporization chamber increases to a positive critical pressure, the explosion relief system will automatically activate.

4. The intelligent control system for biomass gasification and char production according to claim 1, characterized in that, The bottom flange of the ash chamber is connected to a screw conveyor, which is used to receive biochar from the ash chamber and transfer the received biochar.

5. The intelligent control system for biomass gasification and char production according to claim 1, characterized in that, The gasifier further includes a second hopper, a first valve disposed above and connected to the second hopper, and a second valve disposed below and connected to the second hopper. The first valve is used to control the connection between the second hopper and the feed pipe, and the second valve is used to control the connection between the second hopper and the gasification chamber. The feed pipe is connected to the front-end processing system.

6. The intelligent control system for biomass gasification and char production according to claim 1, characterized in that, It also includes a flue gas purification system for purifying the exhaust gas generated by combustion in the hot steam system.

7. The intelligent control system for biomass gasification and char production according to claim 1, characterized in that, It also includes a flue gas emission system for releasing the purified flue gas into the atmosphere.

8. The intelligent control system for biomass gasification and char production according to claim 1, characterized in that, The hot steam system includes a boiler and a water system, wherein the boiler is used to burn fuel gas and heat water supplied by the water system.

9. The intelligent control system for biomass gasification and char production according to claim 1, characterized in that, The front-end processing system is completely sealed.

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