Feeding control system and method of biomass gasifier

Abstract

The invention relates to the technical field of biomass gasification, and provides a feeding control system and a feeding control method of a biomass gasifier, a blanking acceleration mechanism deviating from a blanking channel is arranged in a storage bin, and a vortex flow field is formed when the blanking acceleration mechanism rotates, so that the feeding speed of the biomass gasifier is increased; a certain pressure difference is formed between the pressurizing pipeline connected with the top of the storage bin and the pressurizing pipeline connected with the discharging pipeline, so that the materials can fall into a pipeline of the spiral feeder as soon as possible in the storage bin under the action of a flow field and the gravity of the materials, and the materials are conveyed to the discharging pipeline through the spiral feeder; and stable biomass materials are conveyed to the gasification furnace under the pressure action of the pressure pipeline, so that the reaction stability in the biomass gasification furnace is improved, and a gas product meeting requirements is obtained.

Description

Technical Field

[0001] This invention relates to the field of biomass gasification technology, and in particular to a feeding control system and method for a biomass gasifier. Background Technology

[0002] Biomass gasification refers to the process of converting biomass into combustible gaseous fuels. Through biomass gasification technology, various biomass resources such as wood, straw, crop residues, and municipal waste can be converted into biomass gases (including carbon monoxide, hydrogen, and methane), which can then be used for power generation, heating, industrial production, and other fields.

[0003] Biomass gasification generally employs a thermochemical reaction process under high-temperature conditions to decompose biomass feedstock into a series of gaseous and liquid products. Its main reaction methods include dry distillation, gas-phase cracking, partial oxidation, and water-gas transfer reactions. During the biomass gasification process, it is necessary to control parameters such as reaction temperature, pressure, and gas flow rate to achieve the best conversion rate and gas production effect.

[0004] Existing biomass gasifiers improve the efficiency of material delivery to the gasifier by pressurizing, but this also increases the pressure inside the silo. For biomass materials with low density and light weight, there will be difficulties in feeding them into the silo, which will affect the uniformity of the feed and thus affect the stability of the biomass gasification reaction. Summary of the Invention

[0005] The purpose of this invention is to provide a feeding control system and method for a biomass gasification furnace, so as to solve the technical problem that the reaction is affected when the material conveying efficiency is improved by pressurization in the existing biomass gasification reaction system.

[0006] In a first aspect, the present invention provides a feeding control system for a biomass gasification furnace, comprising: The storage silo has a material discharge control valve at its top for controlling the discharge of material from the buffer silo. The storage silo is equipped with a material discharge acceleration mechanism, which includes a first drive motor, a stirring shaft, and spiral blades. The stirring shaft is dynamically and rotatably connected to the top of the storage silo and is driven by the first drive motor. The centerline of the stirring shaft and the centerline of the storage silo have a preset angle so that the spiral blades form an inclined vortex flow field when they rotate. The screw feeding mechanism includes a second drive motor, a feed pipe and a discharge pipe. The feed pipe is connected to the lower end of the storage bin, and the discharge pipe is used to transport biomass materials to the gasifier. A pressurizing assembly, comprising a first pressurizing pipeline and a second pressurizing pipeline, wherein the first pressurizing pipeline is connected to the discharge pipeline and is provided with a first air pressure control valve, and the second pressurizing pipeline is connected to the top of the storage silo and is provided with a second air pressure control valve; The control unit is electrically connected to the first drive motor, the second drive motor, the first pneumatic control valve, the second pneumatic control valve, and the discharge control valve, respectively. It is used to control the pressure difference between the second pneumatic control valve and the first pneumatic control valve to be within a preset pressure difference range, and to control the first drive motor and the second drive motor to start, so that the biomass material is uniformly output from the discharge pipe.

[0007] Optionally, the preset pressure difference value is 0.1MPa~0.2MPa.

[0008] Optionally, the end of the stirring shaft away from the first drive motor intersects the centerline of the storage silo, and the preset included angle is 20 degrees to 35 degrees.

[0009] Optionally, the bottom of the storage silo is an inverted cone structure, and the end of the stirring shaft away from the first drive motor extends to the center line of the inverted cone structure.

[0010] Optionally, the outer diameter of the spiral blade gradually decreases from the end closer to the first drive motor to the end farther away from the first drive motor.

[0011] Optionally, the feeding control system of the biomass gasification furnace further includes: a pulse air inlet pipeline, which is located at the inverted cone structure position of the storage silo. The pulse air inlet pipeline is used to deliver pulse airflow into the storage silo. The pressure of the pulse airflow is 0.6~0.7MPa, and the jetting frequency is 10~15 times per minute.

[0012] Optionally, the storage silo is equipped with a first pressure detection component for detecting the pressure inside the storage silo; the top side of the storage silo is provided with an exhaust port, and an exhaust control valve is provided at the exhaust port for controlling the exhaust flow rate; the control unit is electrically connected to the first pressure detection component and the exhaust control valve respectively, and is used to control the exhaust control valve to open and control the speed of the first drive motor to decrease when the pressure inside the storage silo exceeds the upper limit of the pressure threshold; or, when the pressure inside the storage silo is less than the lower limit of the pressure threshold, control the exhaust control valve to close and control the speed of the first drive motor to increase.

[0013] Optionally, the pressure control range of the first pneumatic control valve is 0.5MPa~0.6MPa; and the pressure control range of the second pneumatic control valve is 0.6MPa~0.7MPa.

[0014] Optionally, the gas inlet of the gasifier is connected to the discharge pipe via a pipe, and the biomass gasifier is equipped with a second pressure detection component for real-time detection of the pressure inside the gasifier; the control unit is electrically connected to the second pressure detection component and is used to adjust the speed of the first drive motor and the pressure of the first pressure control valve according to the pressure inside the gasifier, so that the difference between the pressure inside the gasifier and the pressure of the first pressure control valve is within a preset range.

[0015] Secondly, embodiments of the present invention provide a feeding control method for a biomass gasification furnace, based on the feeding control system described in the first aspect, the feeding control method comprising: S100, control the opening of the material discharge control valve; S200, control the first pneumatic control valve and the second pneumatic control valve to open, and the pressure difference between the second pneumatic control valve and the first pneumatic control valve is within a preset pressure difference range; S300, control the start of the first drive motor and the start of the second drive motor.

[0016] Optionally, step S300 may further include: S310, when the pressure in the storage silo exceeds the upper limit of the pressure threshold, control the exhaust control valve to open and control the first drive motor to reduce its speed. S320, when the pressure in the storage silo is less than the lower limit of the pressure threshold, control the exhaust control valve to close and control the speed of the first drive motor to increase.

[0017] This invention has at least the following technical effects: The feeding control system and method for a biomass gasifier provided by this invention, by setting a feeding acceleration mechanism offset from the feeding channel in the storage silo, a vortex flow field is formed when the feeding acceleration mechanism rotates. In conjunction with the pressurized pipeline connected to the top of the storage silo and the pressurized pipeline connected to the discharge pipeline, a certain pressure difference is formed. This ensures that the material falls into the feeder's pipeline under the action of the flow field and its own gravity in the storage silo, and is then transported to the discharge pipeline by the screw feeder. Under the pressure of the pressurized pipeline, a stable supply of biomass material is delivered to the gasifier, thereby improving the stability of the reaction in the biomass gasifier and obtaining the required gaseous products. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 A schematic diagram of the overall structure of a feeding control system for a biomass gasification furnace provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the material feeding acceleration mechanism of a biomass gasification furnace provided in an embodiment of the present invention; Figure 3 A schematic diagram of the module connection of the control unit of a biomass gasification furnace feeding control system provided in an embodiment of the present invention; Figure 4 A flowchart illustrating a feeding control method for a biomass gasification furnace provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the process after step S300 in a biomass gasification furnace feeding control method provided in an embodiment of the present invention.

[0020] In the diagram: 1-hopper; 101-feed control valve; 2-first drive motor; 3-exhaust pipe; 4-feed acceleration mechanism; 401-stirring shaft; 402-spiral blade; 5-storage hopper; 6-feeding hopper; 601-first pressure detection component; 7-feeding pipe; 8-second drive motor; 9-spiral feeding mechanism; 10-pressurizing branch pipe; 11-second air pressure control valve; 12-pulse air intake pipe; 13-pressurizing main pipe; 14-first air pressure control valve; 15-discharge pipe; 16-gasifier; 161-second pressure detection component; 17-control unit. Detailed Implementation

[0021] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless specifically defined as herein.

[0023] Those skilled in the art will understand that, unless specifically stated otherwise, the singular forms “a,” “an,” “the,” and “the” used herein may also include the plural forms. It should be further understood that the term “comprising” as used in this specification means the presence of the stated features, integers, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. The term “and / or” as used herein includes all or any units and all combinations of one or more associated listed items.

[0024] like Figures 1 to 3 As shown, an embodiment of the present invention provides a feeding control system for a biomass gasification furnace, including: a storage bin, a screw feeder, a pressurization component, and a control unit.

[0025] Specifically, the top of the storage silo is equipped with a discharge control valve for controlling the discharge from the buffer silo. Opening the discharge control valve allows material to be supplied from the buffer silo to the storage silo. The discharge control valve can be opened intermittently, for example, when insufficient material is detected in the storage silo, or at regular intervals and in fixed quantities. The storage silo is equipped with a discharge acceleration mechanism, which includes a first drive motor, a stirring shaft, and spiral blades. The spiral blades are arranged spirally along the stirring shaft. The stirring shaft is dynamically and rotatably connected to the top of the storage silo. The stirring shaft is driven by the first drive motor, which controls the rotational speed of the stirring shaft, thereby creating a corresponding flow field within the storage silo. Simultaneously, the agitation by the spiral blades also disperses any bridging material, preventing material bridging.

[0026] There is a preset angle between the centerline of the stirring shaft and the centerline of the storage bin, that is, the stirring shaft is inclined in the storage bin so that the spiral blades form an inclined vortex flow field when they rotate. The inclined stirring shaft and spiral blades will not obstruct the material from falling from the bin after the original top valve is opened. Instead, the vortex flow field drives the material to stir and fall, which helps to increase the uniformity of material mixing and the smoothness of material discharge.

[0027] The screw feeder mechanism specifically includes a second drive motor, a feed pipe, and a discharge pipe. The feed pipe is connected to the lower end of the storage silo, and the discharge pipe is used to transport biomass materials to the gasifier. The feeding speed of the screw feeder can be adjusted by controlling the speed of the second drive motor, which facilitates the control of the feeding uniformity of the entire system.

[0028] To facilitate smooth material feeding through the material feeding acceleration mechanism, this embodiment of the invention adds a pressurization component. The pressurization component specifically includes a first pressurization pipeline and a second pressurization pipeline. The first pressurization pipeline is connected to the discharge pipeline and is equipped with a first air pressure control valve. The second pressurization pipeline is connected to the top of the storage silo and is equipped with a second air pressure control valve.

[0029] Furthermore, the control unit is electrically connected to the first drive motor, the second drive motor, the first pneumatic control valve, the second pneumatic control valve, and the discharge control valve, respectively. It is used to control the pressure difference between the second pneumatic control valve and the first pneumatic control valve within a preset range. This preset range ensures the pressure difference between the upper and lower parts of the storage bin, which is beneficial for the smooth falling of materials. At the same time, it controls the first drive motor and the second drive motor to start. That is, after the first drive motor starts, a vortex flow field is formed in the storage bin, making the material fall more smoothly. The second drive motor drives the screw feeder to work, thereby ensuring the uniform delivery of materials so that the biomass materials are uniformly output from the discharge pipe.

[0030] It is understood that the rotational speed of the first drive motor and the rotational speed of the second drive motor can be adaptively adjusted according to the shape of the material, particle parameters, conveying speed and pressure-related parameters, so as to ensure that the final material is uniformly output to the biomass gasification furnace. This embodiment does not specifically limit the rotational speed of the first drive motor and the rotational speed of the second drive motor.

[0031] The feeding control system and method for a biomass gasifier provided by this invention, by setting a feeding acceleration mechanism offset from the feeding channel in the storage silo, a vortex flow field is formed when the feeding acceleration mechanism rotates. In conjunction with the pressurized pipeline connected to the top of the storage silo and the pressurized pipeline connected to the discharge pipeline, a certain pressure difference is formed. This ensures that the material falls into the feeder's pipeline under the action of the flow field and its own gravity in the storage silo, and is then transported to the discharge pipeline by the screw feeder. Under the pressure of the pressurized pipeline, a stable supply of biomass material is delivered to the gasifier, thereby improving the stability of the reaction in the biomass gasifier and obtaining the required gaseous products.

[0032] Optionally, the pressure difference between the second pneumatic control valve and the first pneumatic control valve is 0.1 Pa to 0.2 Pa. It is understood that if the pressure difference is too small, it will hinder material flow; if the pressure difference is too large, it will affect the distribution of the vortex flow field within the storage silo, thus hindering the material's descent.

[0033] In some embodiments, the end of the stirring shaft away from the first drive motor intersects the centerline of the storage bin, and the preset angle is 20 degrees to 35 degrees. If the angle is too small, it will occupy the material discharge channel and affect the material discharge (e.g., set in the vertical direction); while if the angle is too large, the driving effect of the vortex flow field on the material discharge will be smaller (e.g., set in the horizontal direction). Therefore, this embodiment needs to control the preset angle within the above range to ensure the best material discharge effect.

[0034] In some embodiments, the bottom of the storage hopper is an inverted cone structure, and the end of the stirring shaft away from the first drive motor extends to the center line of the inverted cone structure. This allows the material to smoothly enter the inverted cone structure under the action of the vortex flow field and air pressure difference, which is more conducive to the falling of the material and thus facilitates the uniform conveying of the material.

[0035] In some embodiments, the outer diameter of the spiral blades gradually decreases from the end closer to the first drive motor to the end farther away from the first drive motor, so that the disturbance of the vortex flow field near the middle area of ​​the storage bin is greater, which is more conducive to accelerating the falling of materials.

[0036] In some embodiments, the sidewall of the storage silo is provided with multiple fin structures, and the multiple fin structures form a guide channel that is discontinuously distributed on the sidewall. The spiral direction of the guide channel is the same as the spiral direction of the spiral blade. In this way, the vortex flow field is more likely to accelerate at the position of the guide channel, thereby improving the material conveying effect under the action of the flow field.

[0037] Optionally, please continue reading Figure 1 The biomass gasification furnace feeding control system provided in this embodiment also includes a pulse air inlet pipeline. The pulse air inlet pipeline is located at the inverted cone structure of the storage silo. The pulse air inlet pipeline is used to deliver pulse airflow into the storage silo. The pressure of the pulse airflow is 0.6~0.7MPa, and the jetting frequency is 10~15 times per minute. By injecting compressed air into the inverted cone structure, not only can the material arching be avoided, but also a negative pressure is formed in the inverted cone structure at the moment of injection, which is conducive to the material falling into the inverted cone structure, further improving the material falling effect and the uniformity of material conveying.

[0038] In some embodiments, the storage silo is provided with a first pressure detection component for detecting the pressure inside the storage silo; the top side of the storage silo is provided with an exhaust port, and an exhaust control valve is provided at the exhaust port for controlling the exhaust flow rate.

[0039] Specifically, the control unit is electrically connected to the first pressure detection component and the exhaust control valve, respectively, and is used to control the exhaust control valve to open and control the first drive motor to reduce its speed when the pressure in the storage hopper exceeds the upper limit of the pressure threshold; or, when the pressure in the storage hopper is less than the lower limit of the pressure threshold, control the exhaust control valve to close and control the first drive motor to increase its speed.

[0040] This embodiment obtains the pressure inside the storage silo and controls the exhaust based on this pressure. At the same time, it controls the rotational speed of the first drive motor of the material dropping acceleration mechanism. This not only avoids excessive pressure inside the storage silo, which could affect safety, but also reduces the rotational speed of the first drive motor, thereby reducing power consumption. Furthermore, it avoids insufficient pressure, which could affect the material dropping effect. Therefore, by accelerating the first drive motor, the flow of the worm gear flow field is increased, which is beneficial to accelerating the falling of materials. In this way, the combination of air pressure and vortex flow field can achieve a balance between motor power and material falling, thereby achieving optimized control of the feeding system.

[0041] In some embodiments, the pressure control range of the first pneumatic control valve is 0.5 Pa to 0.6 Pa; the pressure control range of the second pneumatic control valve is 0.6 Pa to 0.7 Pa, and the pressure difference between the second pneumatic control valve and the first pneumatic control valve is 0.1 to 0.2 MPa. This facilitates the smooth descent of materials and ensures that the pressure in the entire storage silo is within a safe range.

[0042] In some embodiments, the gas inlet of the gasifier is connected to the discharge pipe via a pipe, and the biomass gasifier is provided with a second pressure detection component for real-time detection of the pressure inside the gasifier.

[0043] Specifically, the control unit is electrically connected to the second pressure detection component and is used to adjust the speed of the first drive motor and the pressure of the first air pressure control valve according to the pressure inside the gasifier, so that the difference between the pressure inside the gasifier and the pressure of the first air pressure control valve is within a preset range. In this way, by establishing the correlation between the pressure inside the gasifier and the pressurization pressure of the screw feeder, a control basis is provided for the smooth falling of materials in the storage bin.

[0044] When the pressure inside the biomass gasifier is too high, to ensure uniform feeding, considering the high pressure inside the gasifier, the speed of the first drive motor needs to be increased to ensure timely feeding. Simultaneously, the pressure of the first pressure control valve needs to be reduced to lower the pressure inside the biomass gasifier. Conversely, when the pressure inside the biomass gasifier is too low, to ensure uniform feeding, considering the low pressure inside the gasifier, the speed of the first drive motor needs to be reduced to avoid overfeeding. Simultaneously, the pressure of the first pressure control valve needs to be increased to raise the pressure inside the biomass gasifier, thereby ensuring the normal operation of the reaction within the biomass gasifier.

[0045] Based on the same inventive concept, such as Figure 4 As shown, this embodiment of the invention also provides a feeding control method for a biomass gasifier. This feeding control method is based on the feeding control system described in the foregoing embodiments. The feeding control method for the biomass gasifier includes the following steps S100~S300: S100, control the opening of the material discharge control valve so that the biomass material located in the buffer bin can fall into the storage bin under the action of gravity.

[0046] S200, control the first pneumatic control valve and the second pneumatic control valve to open, and the pressure difference between the second pneumatic control valve and the first pneumatic control valve is within a preset pressure difference range.

[0047] Optionally, the preset pressure difference is 0.1MPa~0.2MPa, and the air inlet pressure above the hopper is greater than the air inlet pressure below (entering from the screw feeder mechanism).

[0048] S300, control the start of the first drive motor and the start of the second drive motor.

[0049] Optionally, after the first drive motor starts, it forms a vortex flow field in the storage bin, making the material fall more smoothly. The second drive motor drives the screw feeder to work, thereby ensuring the uniform delivery of the material, so that the biomass material is uniformly output from the discharge pipe.

[0050] The feeding control method for a biomass gasifier provided by this invention involves setting a feeding acceleration mechanism offset from the feeding channel within the storage silo. When the feeding acceleration mechanism rotates, it forms a vortex flow field. This, combined with a pressure difference between the pressurized pipeline connecting the top of the storage silo and the pressurized pipeline connecting the discharge pipe, ensures that the material falls into the screw feeder's feed pipe under the influence of the flow field and its own gravity within the storage silo. The material is then transported to the discharge pipe by the screw feeder and, under the pressure of the pressurized pipeline, provides a stable supply of biomass material to the gasifier, thereby improving the stability of the reaction within the biomass gasifier and obtaining the required gaseous products.

[0051] Optionally, such as Figure 5 As shown, after step S300, the following steps are also included: S310, when the pressure in the storage silo exceeds the upper limit of the pressure threshold, control the exhaust control valve to open and control the first drive motor to reduce its speed.

[0052] S320, when the pressure in the storage silo is less than the lower limit of the pressure threshold, control the exhaust control valve to close and control the speed of the first drive motor to increase.

[0053] This embodiment obtains the pressure inside the storage silo and controls the exhaust based on this pressure. At the same time, it controls the rotational speed of the first drive motor of the material dropping acceleration mechanism. This not only avoids excessive pressure inside the storage silo, which could affect safety, but also reduces the rotational speed of the first drive motor, thereby reducing power consumption. Furthermore, it avoids insufficient pressure, which could affect the material dropping effect. Therefore, by accelerating the first drive motor, the flow of the worm gear flow field is increased, which is beneficial to accelerating the falling of materials. In this way, the combination of air pressure and vortex flow field can achieve a balance between motor power and material falling, thereby achieving optimized control of the feeding system.

[0054] It should be noted that the sterilization method for preventing jacket water vaporization in the embodiments of the present invention is based on the sterilization system in the foregoing embodiments, and the functions and descriptions of each module will not be elaborated here.

[0055] In the description of this invention, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0056] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0057] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. In the description of this specification, specific features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A feeding control system for a biomass gasification furnace, characterized in that, include: The storage silo has a material discharge control valve at its top for controlling the discharge of material from the buffer silo. The storage silo is equipped with a material discharge acceleration mechanism, which includes a first drive motor, a stirring shaft, and spiral blades. The stirring shaft is dynamically and rotatably connected to the top of the storage silo and is driven by the first drive motor. The centerline of the stirring shaft and the centerline of the storage silo have a preset angle so that the spiral blades form an inclined vortex flow field when they rotate. The screw feeding mechanism includes a second drive motor, a feed pipe and a discharge pipe. The feed pipe is connected to the lower end of the storage bin, and the discharge pipe is used to transport biomass materials to the gasifier. A pressurizing assembly, comprising a first pressurizing pipeline and a second pressurizing pipeline, wherein the first pressurizing pipeline is connected to the discharge pipeline and is provided with a first air pressure control valve, and the second pressurizing pipeline is connected to the top of the storage silo and is provided with a second air pressure control valve; The control unit is electrically connected to the first drive motor, the second drive motor, the first pneumatic control valve, the second pneumatic control valve, and the discharge control valve, respectively. It is used to control the pressure difference between the second pneumatic control valve and the first pneumatic control valve to be within a preset pressure difference range, and to control the first drive motor and the second drive motor to start, so that the biomass material is uniformly output from the discharge pipe.

2. The feeding control system for the biomass gasification furnace according to claim 1, characterized in that, The preset pressure difference value is 0.1MPa~0.2MPa.

3. The feeding control system for the biomass gasification furnace according to claim 1, characterized in that, The end of the stirring shaft away from the first drive motor intersects the center line of the storage bin, and the preset included angle is 20 degrees to 35 degrees.

4. The feeding control system for the biomass gasification furnace according to claim 3, characterized in that, The bottom of the storage silo has an inverted cone structure, and the end of the stirring shaft away from the first drive motor extends to the center line of the inverted cone structure.

5. The feeding control system for the biomass gasification furnace according to any one of claims 1 to 4, characterized in that, The outer diameter of the spiral blade gradually decreases from the end closer to the first drive motor to the end farther away from the first drive motor.

6. The feeding control system for the biomass gasification furnace according to claim 4, characterized in that, Also includes: A pulse air intake pipeline is used to deliver pulsed airflow into the storage silo. The pressure of the pulsed airflow is 0.6~0.7MPa, and the jet frequency is 10~15 times per minute.

7. The feeding control system for the biomass gasification furnace according to claim 1, characterized in that, The storage silo is equipped with a first pressure detection component for detecting the pressure inside the storage silo; The storage silo is provided with an exhaust port on the top side, and an exhaust control valve is provided at the exhaust port to control the exhaust flow rate. The control unit is electrically connected to the first pressure detection component and the exhaust control valve, respectively, and is used to control the exhaust control valve to open and control the speed of the first drive motor to decrease when the pressure in the storage silo exceeds the upper limit of the pressure threshold; or, when the pressure in the storage silo is less than the lower limit of the pressure threshold, control the exhaust control valve to close and control the speed of the first drive motor to increase.

8. The feeding control system for the biomass gasification furnace according to claim 7, characterized in that, The pressure control range of the first pneumatic control valve is 0.5MPa~0.6MPa; the pressure control range of the second pneumatic control valve is 0.6MPa~0.7MPa.

9. The feeding control system for the biomass gasification furnace according to claim 7, characterized in that, The gasifier's air inlet is connected to the discharge pipe via a pipe. The biomass gasifier is equipped with a second pressure detection component for real-time monitoring of the pressure inside the gasifier. The control unit is electrically connected to the second pressure detection component and is used to adjust the speed of the first drive motor and the pressure of the first pressure control valve according to the pressure inside the gasifier, so that the difference between the pressure inside the gasifier and the pressure of the first pressure control valve is within a preset range.

10. A method for controlling the feeding of a biomass gasification furnace, characterized in that, Based on the feeding control system as described in any one of claims 1 to 9, the feeding control method includes: S100, control the opening of the material discharge control valve; S200, control the first pneumatic control valve and the second pneumatic control valve to open, and the pressure difference between the second pneumatic control valve and the first pneumatic control valve is within a preset pressure difference range; S300, control the start of the first drive motor and the start of the second drive motor.

11. The feeding control method for a biomass gasification furnace according to claim 10, characterized in that, Step S300 includes the following: S310, when the pressure in the storage silo exceeds the upper limit of the pressure threshold, control the exhaust control valve to open and control the first drive motor to reduce its speed. S320, when the pressure in the storage silo is less than the lower limit of the pressure threshold, control the exhaust control valve to close and control the speed of the first drive motor to increase.

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