Biomass gasification feeding system

Abstract

The invention provides a biomass gasification feeding system, and relates to the technical field of biomass energy. Comprising an air blower, and a stock bin, a first feeder, a first air locking valve, a middle bin and a second air locking valve which are sequentially arranged in the positive direction of a first conveying path and are connected end to end; a discharging opening of the second air locking valve is used for being connected with a feeding opening of the gasification furnace, and the first air locking valve and the second air locking valve are both valves allowing one-way connection in the positive direction; the middle bin is provided with a first air inlet, the fan is provided with a first air outlet and a second air outlet, the first air outlet is connected with the first air inlet through a first adjusting valve, the second air outlet is connected with the atmospheric environment through a first pressure release valve, and the first adjusting valve is a valve capable of adjusting the opening degree of the first adjusting valve. The controllable positive pressure barrier is established and maintained in the middle bin through the air blower, and the one-way sealing structures of the first air locking valve and the second air locking valve are combined, so that a dual physical barrier is formed, and synthesis gas in the gasification furnace is prevented from reversely flowing to the upstream along a feeding path.

Description

Technical Field

[0001] This application relates to the field of biomass energy technology, and in particular to a biomass gasification feeding system. Background Technology

[0002] A biomass gasification feeding system typically includes a silo, a feeder, and an airlock valve. During the biomass gasification process, the feeder needs to continuously deliver the biomass material stored in the silo to the gasifier with the help of the airlock valve to ensure continuous and efficient operation of the gasification process.

[0003] During this period, syngas will be generated in the gasifier. If the pressure in the gasifier fluctuates significantly, causing the airlock valve to fail, the syngas may backflow into the biomass gasification feeding system, disrupting the continuity of the feeding process and even causing the biomass material to react prematurely during transportation. Summary of the Invention

[0004] This application provides a biomass gasification feeding system that establishes and maintains a controllable positive pressure barrier in the intermediate chamber by means of a blower. Combined with the one-way sealing structure of the first and second airlock valves, a double physical barrier is formed to prevent the syngas in the gasifier from flowing upstream along the feeding path.

[0005] This application provides a biomass gasification feeding system for conveying biomass materials to a gasifier. The system is characterized by comprising: a blower, and a hopper, a first feeder, a first airlock valve, an intermediate hopper, and a second airlock valve that are sequentially arranged and connected end to end along the positive direction of a first conveying path for the biomass materials. The outlet of the second airlock valve is used to connect to the inlet of the gasifier. Both the first and second airlock valves are valves that allow unidirectional flow in the positive direction. The intermediate compartment is equipped with a first air inlet, which is located in the area between the feed inlet and the discharge outlet of the intermediate compartment. The blower has a first air outlet and a second air outlet. The first air outlet is connected to the first air inlet through a first regulating valve, and the second air outlet is connected to the atmospheric environment through a first pressure relief valve. The first regulating valve is a valve that can adjust its own opening degree.

[0006] Optionally, it may also include: a first pressure sensor and a second pressure sensor; The first pressure sensor is located inside the intermediate chamber, and the second pressure sensor is located in the first conveying path between the second airlock valve and the gasifier. Both the first and second pressure sensors are used to detect the pressure in their respective areas. The first regulating valve is a valve that can adjust its opening degree according to the pressure difference detected by the first pressure sensor and the second pressure sensor.

[0007] Optionally, it also includes: a second feeder; The feed inlet of the second feeder is connected to the discharge outlet of the second airlock valve. The discharge outlet of the second feeder is used to connect to the feed inlet of the gasifier. The second pressure sensor is located in the first conveying path of the second feeder.

[0008] Optionally, the blower also has a third air outlet; The third air outlet is connected to the air inlet of the hopper, the air inlet of the first feeder, and any one of the atmospheric environments via the second regulating valve. The second regulating valve is a valve that can increase its opening degree when the pressure value detected by the first pressure sensor is greater than a preset threshold.

[0009] Optionally, it also includes: a dust concentration sensor; The dust concentration sensor is installed in the first conveying path of the first feeder, and the dust concentration sensor is used to detect the dust concentration in the first feeder; The first feeder is equipped with a second air inlet and a fourth air outlet. The third air outlet is connected to the second air inlet through a second regulating valve. The second regulating valve can also adjust its opening degree according to the dust concentration. The fourth vent is connected to the atmospheric environment through the second pressure relief valve.

[0010] Optionally, the second air inlet is located on the side of the first feeder near the feed port of the first feeder, and the second pressure relief valve is located on the side of the first feeder near the discharge port of the first feeder.

[0011] Optionally, it also includes: a first flow sensor and a second flow sensor; The first flow sensor is located in the second delivery path between the first regulating valve and the first air inlet, and the second flow sensor is located in the second delivery path between the second regulating valve and the second air inlet.

[0012] Optionally, the first airlock valve, the intermediate chamber, and the second airlock valve are arranged sequentially along the direction of gravity.

[0013] Optionally, the first feeder and the second feeder are screw feeders.

[0014] Optionally, the blower also has a third outlet, through which the blower can output inert gas.

[0015] This application provides a biomass gasification feeding system, which includes: a blower, and a hopper, a first feeder, a first airlock valve, an intermediate hopper, and a second airlock valve arranged sequentially and connected end-to-end along a first conveying path; the outlet of the second airlock valve is used to connect to the inlet of the gasifier, and both the first and second airlock valves are valves that allow unidirectional flow in the forward direction; the intermediate hopper is provided with a first air inlet, which is located in the area between the inlet and outlet of the intermediate hopper; the blower has a first air outlet and a second air outlet, the first air outlet is connected to the first air inlet through a first regulating valve, and the second air outlet is connected to the atmospheric environment through a first pressure relief valve, and the first regulating valve is a valve that can adjust its own opening degree. The following technical effects were achieved: a controllable positive pressure barrier was established and maintained in the intermediate chamber by a blower, and a double physical barrier was formed by the one-way sealing structure of the first and second airlock valves, preventing the syngas in the gasifier from backflowing upstream along the feed path; the air intake of the intermediate chamber was adjusted by the first regulating valve, and in conjunction with the first pressure relief valve, the pressure in the intermediate chamber was dynamically and stably controlled, adapting to different working conditions and improving the reliability and automation level of the biomass gasification feeding system.

[0016] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 A schematic diagram of the structure of the biomass gasification feeding system provided in the embodiments of this application. Figure 1 ; Figure 2 A schematic diagram of the structure of the biomass gasification feeding system provided in the embodiments of this application. Figure 2 ; Figure 3 A schematic flowchart illustrating the control method for the biomass gasification feeding system provided in this application embodiment.

[0018] Figure label: 100 - Blower; 111 - First air outlet; 112 - First regulating valve; 113 - First flow sensor; 121 - Second air outlet; 122 - First pressure relief valve; 131 - Third air outlet; 132 - Second regulating valve; 133 - Second flow sensor; 200-Hopper; 300 - First feeder; 301 - Third pressure sensor; 302 - Second air inlet; 303 - Fourth air outlet; 304 - Second pressure relief valve; 400 - First airlock valve; 500 - Intermediate compartment; 501 - First air inlet; 502 - First pressure sensor; 600 - Second airlock valve; 700 - Second feeder; 701 - Second pressure sensor; 800-Gasification Furnace. Detailed Implementation

[0019] The embodiments of this application will now be described in detail. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0020] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise stated, "multiple" means two or more. Furthermore, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0021] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application.

[0022] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0023] To clearly understand the technical solution of this application, the solutions of the prior art will be described in detail first.

[0024] Current biomass gasification feeding systems typically include a silo, a feeder, and an airlock valve. The silo stores biomass materials, which are then pushed into the feeder by gravity or mechanical means. The feeder continuously delivers biomass materials to the gasifier via the airlock valve. The airlock valve is located between the feeder and the gasifier and acts as a physical barrier to prevent high-pressure syngas from flowing back into the feed channel.

[0025] However, in actual operation, the pressure inside the gasifier often fluctuates significantly due to reaction fluctuations, load adjustments, or seal aging. If the airlock valve experiences a momentary sealing failure or a delayed response, syngas can easily backflow into the biomass gasification feed system. This phenomenon not only disrupts the continuity of biomass material transport but may also lead to premature pyrolysis or partial combustion of the biomass material during transport. This can result in reduced gasification efficiency and increased equipment wear, or even localized overheating, blockages, and safety risks.

[0026] The root cause of this problem lies not only in the insufficient sealing performance of the airlock valve, but also in the lack of the ability to actively build and dynamically maintain pressure balance in the entire biomass gasification feeding system. Specifically, existing technologies mostly rely on a single airlock valve for passive protection, without setting up an independent airflow control mechanism at key upstream nodes (such as the feeder inlet), thus failing to form an effective positive pressure barrier before syngas backflow.

[0027] In addition to the aforementioned major technical issues, biomass gasification feeding systems also suffer from dust interference and lag in response to pressure fluctuations, making preventative intervention difficult. Specifically, dust interference refers to the large amount of dust generated when biomass materials are fed into the feeder from the silo. Existing systems lack directional airflow guidance or negative pressure suction design, leading to dust overflow and environmental pollution. Furthermore, dust deposits can clog auger blades or sensor interfaces, reducing feeding efficiency and system reliability. Lag in response to pressure fluctuations refers to the lack of real-time monitoring and dynamic adjustment of pressure gradients at different stages of the biomass material conveying path. When the flowability of the biomass material changes or equipment resistance increases, local pressure cannot be corrected in time, easily causing problems such as material jamming, pulsating conveying, and even mechanical overload.

[0028] Therefore, in response to the above technical problems, the research found that an intermediate compartment can be set up in the biomass material conveying path, and airlock valves can be arranged at both ends of the compartment. Clean sealing gas can be continuously injected into the area through the airflow branch to form a positive pressure barrier that can resist the backflow of syngas.

[0029] Furthermore, an auxiliary airflow branch is set in the feeder's air inlet pipe to guide the sealing air in a specific direction according to the feeding rhythm, so as to suppress dust diffusion and assist the biomass material to fall smoothly.

[0030] Furthermore, multiple pressure sensors are installed in the biomass gasification feeding system to collect pressure data in real time, and the valve openings of each airflow branch are adjusted in conjunction with the processor to achieve rapid response and dynamic compensation for pressure anomalies.

[0031] The technical solutions of this application will be described in detail below with reference to specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will be described below with reference to the accompanying drawings.

[0032] Figure 1 A schematic diagram of the structure of the biomass gasification feeding system provided in the embodiments of this application. Figure 1 Biomass gasification feeding systems are used to feed biomass materials into the gasifier, such as... Figure 1 As shown, the biomass gasification feeding system includes: a blower 100, and a hopper 200, a first feeder 300, a first airlock valve 400, an intermediate hopper 500, and a second airlock valve 600, which are arranged sequentially and connected end-to-end along the first conveying path of the biomass material. The outlet of the second airlock valve 600 is used to connect to the inlet of the gasifier 800. Both the first airlock valve 400 and the second airlock valve 600 are valves that allow unidirectional flow in the forward direction. The intermediate hopper 500 is provided with a first air inlet 501, which is located in the area between the inlet and outlet of the intermediate hopper 500. The blower 100 has a first air outlet 111 and a second air outlet 121. The first air outlet 111 is connected to the first air inlet 501 through a first regulating valve 112, and the second air outlet 121 is connected to the atmospheric environment through a first pressure relief valve 122. The first regulating valve 112 is a valve that can adjust its own opening.

[0033] Specifically, the blower 100 is used to provide air power for the biomass gasification feeding system. The blower 100 has a first outlet 111 and a second outlet 121. The first outlet 111 is connected to the first inlet 501 through a first regulating valve 112. The first regulating valve 112 can be an adjustable valve, and its opening can be adjusted manually or automatically. The blower 100 is used to inject controllable sealing gas into the intermediate chamber 500 through the first outlet 111 and the first regulating valve 112 to establish and maintain a positive pressure barrier. The second outlet 121 is connected to the atmospheric environment through a first pressure relief valve 122. The first pressure relief valve 122 can be a normally open valve that can open to relieve pressure when the pressure exceeds a set threshold, preventing overpressure at the outlet of the blower 100.

[0034] Sensors can be installed inside the intermediate chamber 500 to collect pressure data within the intermediate chamber 500. When the pressure inside the intermediate chamber 500 is too low, it may be unable to maintain a positive pressure barrier at the feed inlet of the gasifier 800. In this case, the opening of the first regulating valve 112 is increased (the opening of the first regulating valve 112 can be adjusted based on the opening data of the first regulating valve 112, which can be directly collected by an angular displacement sensor, potentiometer, or encoder installed on the valve stem or actuator), thereby increasing the air supply from the blower 100 to the intermediate chamber 500 and increasing the pressure inside the intermediate chamber 500. When the pressure inside the intermediate silo 500 is too high, it may cause unstable biomass material transportation, increased valve wear, or energy waste. In this case, the first regulating valve 112 reduces its opening, thereby reducing the amount of air supplied by the blower 100 to the intermediate silo 500 and lowering the pressure inside the intermediate silo 500. Furthermore, the opening of the first regulating valve 112 is reduced to the point that the first pressure relief valve 122 opens, and the first pressure relief valve 122 discharges the excess sealing gas generated by the blower 100 into the atmosphere.

[0035] The silo 200 is used to store biomass materials to be transported. Its outlet is connected to the inlet of the first feeder 300. The initial supply of biomass materials is achieved through gravity or an auxiliary arch-breaking device.

[0036] The first feeder 300 receives biomass material from the silo 200 through its inlet, and its outlet is connected to the inlet of the first airlock valve 400. It continuously or intermittently pushes the biomass material to the first airlock valve 400 at a set rate. The first feeder 300 can be a screw feeder, belt feeder, or rotary feeder, etc., used to quantitatively and stably control the flow rate of biomass material, preventing accumulation or interruption of the biomass flow.

[0037] The first airlock valve 400 is located between the first feeder 300 and the intermediate silo 500. The first airlock valve 400 receives biomass material from the first feeder 300 through its inlet, and its outlet is connected to the inlet of the intermediate silo 500. The first airlock valve 400 can be a rotary valve, a double flap valve, a sliding valve, or a pneumatic slide valve, etc. It only allows biomass material to pass in the forward direction (i.e., from the first feeder 300 to the intermediate silo 500), while preventing the sealing air from flowing in the reverse direction, thereby forming an airtight barrier between the intermediate silo 500 and the upstream equipment.

[0038] The intermediate silo 500 is a buffer and pressure-stabilizing container. It has an inlet on its top or side wall, through which it receives biomass material from the first feeder 300. It also has an outlet on its bottom or side wall, through which it connects to the inlet of the second airlock valve 600, enabling controlled downstream release of the biomass material. The intermediate silo 500 also has a first air inlet 501 on its top or side wall, located in the area between its inlet and outlet, used to receive sealing air supplied by the blower 100, maintaining a stable positive pressure inside the silo.

[0039] The second airlock valve 600 is located between the intermediate chamber 500 and the gasifier 800. Its structure is similar to the first airlock valve 400, also a unidirectional flow structure. The second airlock valve 600 receives biomass material from the intermediate chamber 500 through its inlet, and its outlet is used to connect to the inlet of the gasifier 800. The second airlock valve 600 allows biomass material to flow from the intermediate chamber 500 to the gasifier 800 while preventing syngas in the gasifier 800 from flowing back into the intermediate chamber 500, thereby maintaining a positive pressure barrier at the inlet of the gasifier 800.

[0040] The entire biomass gasification feeding system is sealed in one direction through the series connection of the first airlock valve 400 and the second airlock valve 600. In conjunction with the blower 100, gas is continuously supplied to the intermediate chamber 500 through the first regulating valve 112. A positive pressure barrier is established and maintained in the intermediate chamber 500, which is higher than the pressure inside the gasifier 800, effectively preventing the synthesis gas from leaking backward along the feeding path.

[0041] This application provides a biomass gasification feeding system, which includes: a blower, and a hopper, a first feeder, a first airlock valve, an intermediate hopper, and a second airlock valve arranged sequentially and connected end-to-end along a first conveying path; the outlet of the second airlock valve is used to connect to the inlet of the gasifier, and both the first and second airlock valves are valves that allow unidirectional flow in the forward direction; the intermediate hopper is provided with a first air inlet, which is located in the area between the inlet and outlet of the intermediate hopper; the blower has a first air outlet and a second air outlet, the first air outlet is connected to the first air inlet through a first regulating valve, and the second air outlet is connected to the atmospheric environment through a first pressure relief valve, and the first regulating valve is a valve that can adjust its own opening degree. The following technical effects were achieved: a controllable positive pressure barrier was established and maintained in the intermediate chamber by a blower, and a double physical barrier was formed by the one-way sealing structure of the first and second airlock valves, preventing the syngas in the gasifier from backflowing upstream along the feed path; the air intake of the intermediate chamber was adjusted by the first regulating valve, and in conjunction with the first pressure relief valve, the pressure in the intermediate chamber was dynamically and stably controlled, adapting to different working conditions and improving the reliability and automation level of the biomass gasification feeding system.

[0042] Optionally, such as Figure 1 As shown, the biomass gasification feeding system also includes: a first pressure sensor 502 and a second pressure sensor 701; the first pressure sensor 502 is located inside the intermediate chamber 500, and the second pressure sensor 701 is located in the first conveying path between the second airlock valve 600 and the gasifier 800. Both the first pressure sensor 502 and the second pressure sensor 701 are used to detect the pressure in their respective areas; the first regulating valve 112 is a valve that can adjust its opening degree according to the pressure difference detected by the first pressure sensor 502 and the second pressure sensor 701.

[0043] Specifically, the first pressure sensor 502 is located inside the intermediate chamber 500. The first pressure sensor 502 can be a capacitive pressure sensor, a piezoresistive pressure sensor, or an absolute pressure sensor, etc., used to detect the pressure inside the intermediate chamber 500. Preferably, the first pressure sensor 502 is located in the area between the first air inlet 501 and the outlet of the intermediate chamber 500, to accurately reflect the sealing gas pressure environment before the biomass material enters the second airlock valve 600. The pressure inside the intermediate chamber 500 is the pushing pressure formed when the blower 100 actively introduces sealing gas, used to resist the syngas pressure in the downstream gasifier 800 and prevent backflow.

[0044] The second pressure sensor 701 is located in the first conveying path between the second airlock valve 600 and the gasifier 800, specifically in the connecting pipe or transition chamber after the outlet of the second airlock valve 600 and before the inlet of the gasifier 800. The second pressure sensor 701 can be a capacitive pressure sensor, a piezoresistive pressure sensor, or an absolute pressure sensor, etc., and is used to detect the pressure at the inlet of the gasifier 800. The pressure at the inlet of the gasifier 800 represents the reverse pressure of the syngas attempting to backflow.

[0045] The first regulating valve 112 is a valve that adjusts its opening degree according to the pressure difference detected by the first pressure sensor 502 and the second pressure sensor 701. Specifically, when the pressure difference detected by the first pressure sensor 502 and the second pressure sensor 701 is lower than a preset safety threshold, it indicates that the pressure in the intermediate chamber 500 is too low, and the first regulating valve 112 increases its opening degree. When the pressure difference detected by the first pressure sensor 502 and the second pressure sensor 701 is higher than the preset safety threshold, it indicates that the pressure in the intermediate chamber 500 is too high, and the first regulating valve 112 decreases its opening degree; furthermore, the opening degree of the first regulating valve 112 decreases until the first pressure relief valve 122 opens, and the first pressure relief valve 122 discharges the excess sealing gas generated by the blower 100 into the atmosphere.

[0046] The technical effect of this application embodiment is that the pressure in their respective installation areas is detected by the first pressure sensor and the second pressure sensor, and a closed-loop feedback control is formed in conjunction with the first regulating valve and the first pressure relief valve, which improves the response speed of the biomass gasification feeding system to pressure fluctuations and realizes the dynamic maintenance of the positive pressure barrier.

[0047] Figure 2 A schematic diagram of the structure of the biomass gasification feeding system provided in the embodiments of this application. Figure 2 Optionally, such as Figure 2 As shown, the biomass gasification feeding system also includes: a second feeder 700; the feed inlet of the second feeder 700 is connected to the discharge outlet of the second airlock valve 600, the discharge outlet of the second feeder 700 is used to connect to the feed inlet of the gasifier 800, and the second pressure sensor 701 is located in the first conveying path of the second feeder 700.

[0048] Specifically, the second feeder 700 is located within the first conveying path between the second airlock valve 600 and the gasifier 800. The second feeder 700 receives biomass material from the second airlock valve 600 through its own inlet, and its own outlet connects to the inlet of the gasifier 800. It continuously or intermittently pushes the biomass material to the gasifier 800 at a set rate. The second feeder 700 can be a screw feeder, belt feeder, or star feeder, etc., used to quantitatively and stably control the flow rate of biomass material, preventing accumulation or interruption of the biomass flow. With the help of the second feeder 700, a stable and continuous supply of biomass material can be ensured from the intermediate silo 500 to the gasifier 800.

[0049] The second pressure sensor 701 is set in the first conveying path between the second airlock valve 600 and the gasifier 800. Specifically, it is set in the chamber after the feed port of the second feeder 700 and before the discharge port in the first conveying path to detect the pressure at the discharge port of the second feeder 700, thereby extending the positive pressure barrier area from the discharge port of the intermediate chamber 500 to a position closer to the feed port of the gasifier 800, that is, the discharge port position of the second feeder 700.

[0050] The technical effects of this application embodiment are as follows: by connecting the second airlock valve and the gasifier through the second feeder, a stable and continuous supply of biomass materials is ensured between the intermediate silo and the gasifier; at the same time, by setting the second pressure sensor in the first conveying path of the second feeder, the positive pressure barrier area is extended from the discharge port of the intermediate silo to the discharge port of the second feeder, thereby improving the integrity of the positive pressure barrier and preventing the synthesis gas from reacting with the biomass materials prematurely.

[0051] Optionally, such as Figure 1 or Figure 2 As shown, the blower 100 also has a third air outlet 131; the third air outlet 131 is connected to the air inlet of the hopper 200, the air inlet of the first feeder 300 and any one of the atmospheric environment through the second regulating valve 132; the second regulating valve 132 is a valve that can increase its opening degree when the pressure value detected by the first pressure sensor 502 is greater than a preset threshold.

[0052] Specifically, the blower 100 is also equipped with a third air outlet 131, which is connected to the air inlet of the hopper 200, the air inlet of the first feeder 300, or the ambient air via a second regulating valve 132. When the pressure difference detected by the first pressure sensor 502 and the second pressure sensor 701 is lower than a preset safety threshold, it indicates that the pressure in the intermediate hopper 500 is still insufficient, so the first regulating valve 112 increases its opening; furthermore, if the pressure is still insufficient, the second regulating valve 132 decreases its opening until it closes, so that more sealing air enters the intermediate hopper 500 to achieve coordinated pressurization. When the pressure difference detected by the first pressure sensor 502 and the second pressure sensor 701 is higher than the preset safety threshold, it indicates that the pressure in the intermediate chamber 500 is too high. In this case, the first regulating valve 112 reduces its opening. Further, if the pressure is still too high, the second regulating valve 132 increases its opening until it is fully open, guiding some of the sealing gas to be diverted from the third outlet 131, thereby indirectly reducing the air supply load of the blower 100 to the intermediate chamber 500 and assisting in the rapid and stable adjustment of the pressure in the intermediate chamber 500. And / or, the opening of the first regulating valve 112 is reduced to the opening of the first pressure relief valve 122, which discharges the excess sealing gas generated by the blower 100 into the atmosphere.

[0053] The third air outlet 131 can be connected to the air inlet of the silo 200 through the second regulating valve 132, allowing sealing air to be introduced into the silo 200. The second regulating valve 132 can also be used to prevent external air from seeping in or to suppress dust from escaping. Alternatively, the third air outlet 131 can be connected to the air inlet of the first feeder 300 through the second regulating valve 132, allowing sealing air to be introduced into the first feeder 300. The second regulating valve 132 can also be used to enhance the sealing of the upstream section of the intermediate silo 500 or to suppress dust from escaping. Or, the third air outlet 131 can be connected to the atmospheric environment through the second regulating valve 132, in which case the second regulating valve 132 is equivalent to a pressure relief valve with adjustable opening.

[0054] The technical effect of this application embodiment is that the air intake of the intermediate chamber is adjusted by the first regulating valve and the second regulating valve, and in conjunction with the first pressure relief valve, the dynamic stability control level of the pressure in the intermediate chamber is improved.

[0055] The biomass gasification feeding system also suffers from dust interference. If the dust concentration inside the first feeder 300 is too high, dust overflow will pollute the operating environment of the first feeder 300. In addition, dust deposition can also clog the spiral blades or sensor interfaces of the first feeder 300, reducing feeding efficiency and system reliability. Based on this, the embodiments of this application intend to suppress dust interference in the first feeder 300 by using the sealing gas of the third air outlet 131.

[0056] Optionally, such as Figure 1 or Figure 2 As shown, the biomass gasification feeding system also includes: a dust concentration sensor; the dust concentration sensor is located in the first conveying path of the first feeder 300, and is used to detect the dust concentration in the first feeder 300; the first feeder 300 is provided with a second air inlet 302 and a fourth air outlet 303, and a third air outlet 131 is connected to the second air inlet 302 through a second regulating valve 132, which can also adjust its opening according to the dust concentration; the fourth air outlet 303 is connected to the atmospheric environment through a second pressure relief valve 304.

[0057] Specifically, the dust concentration sensor is located within the first conveying path of the first feeder 300, specifically within the conveying path between the inlet and outlet of the first feeder 300. The dust concentration sensor is a detection device used to detect the mass concentration or quantity concentration of suspended particulate matter in a gas in real time. It can be a light-scattering dust concentration sensor, an electrostatic induction dust concentration sensor, or a visual acquisition device, etc., used to detect the dust concentration within the first feeder 300.

[0058] The second air inlet 302 is located on the first feeder 300, specifically at the feed inlet, discharge outlet, or a position between the feed inlet and discharge outlet of the first feeder 300. The third air outlet 131 is connected to the second air inlet 302 via the second regulating valve 132. When the dust concentration sensor detects that the dust concentration inside the first feeder 300 is higher than a preset concentration threshold, the second regulating valve 132 opens, allowing some of the sealing air from the blower 100 to enter the first feeder 300, blowing the floating dust to the discharge outlet of the first feeder 300, and then into the first airlock valve 400, thereby reducing the dust concentration. Furthermore, if the dust concentration is still too high, the second regulating valve 132 increases its opening, allowing more sealing air to enter the first feeder 300.

[0059] The fourth vent 303 is located on the first feeder 300, specifically at the feed inlet, discharge outlet, or a location between the feed inlet and discharge outlet of the first feeder 300. The fourth vent 303 is connected to the atmospheric environment through the second pressure relief valve 304. The second pressure relief valve 304 can be a normally open valve, which can open to relieve pressure when the pressure exceeds a set threshold, preventing the sealing gas in the first feeder 300 from entering the intermediate chamber 500 through the first airlock valve 400 and disrupting the dynamic stability of the pressure in the intermediate chamber 500.

[0060] The technical effect of this application embodiment is as follows: the sealing gas output by the blower flows into the first feeder through the second regulating valve, which suppresses the dust concentration in the first feeder; at the same time, the sealing gas output by the blower flows out of the first feeder through the second pressure relief valve, preventing the sealing gas in the first feeder from entering the intermediate silo through the first air lock valve, which further improves the dynamic stability control level of the pressure in the intermediate silo.

[0061] Optionally, the silo 200 is provided with a third air inlet, and a third air outlet 131 is connected to the third air inlet via a second regulating valve 132. A dust concentration sensor is installed inside the silo, which can detect the dust concentration inside the silo 200. The first feeder 300 is provided with a fourth air outlet 303, which is connected to the atmospheric environment via a second pressure relief valve 304. The sealing air output by the blower 100 then flows into the silo 200 and the first feeder 300 through the second regulating valve 132, which can suppress the dust concentration inside the silo 200 and the first feeder 300.

[0062] Optionally, such as Figure 1 or Figure 2 As shown, the second air inlet 302 is located on the side of the first feeder 300 near the feed port of the first feeder 300, and the second pressure relief valve 304 is located on the side of the first feeder 300 near the discharge port of the first feeder 300.

[0063] Specifically, the second air inlet 302 is located on the side of the first feeder 300 near the feed port, and the second pressure relief valve 304 is located on the side of the first feeder 300 near the discharge port. The second air inlet 302 and the second pressure relief valve 304 form a directional airflow channel within the first feeder 300, causing the incoming sealing air to flow from the feed port to the discharge port along the material conveying direction. The sealing air introduced into the first feeder 300 can encapsulate and compress the biomass material just entering the first feeder 300, effectively suppressing dust generated during conveying due to friction, breakage, or impact from drops. Furthermore, the airflow direction is consistent with the movement direction of the biomass material, preventing resistance or disturbance to the conveying of the biomass material and helping to maintain the continuity and stability of feeding.

[0064] The technical effect of this application embodiment is as follows: by setting the second air inlet in the first feeder on the side close to the feed port of the first feeder, and setting the second pressure relief valve in the first feeder on the side close to the discharge port of the first feeder, a directional positive pressure airflow channel along the biomass material conveying direction is constructed, which plays a role in suppressing and removing dust in the first feeder.

[0065] Optionally, such as Figure 1 or Figure 2As shown, the biomass gasification feeding system also includes: a third pressure sensor 301, which is located inside the first feeder 300 and is used to detect the pressure in the corresponding area; and a second regulating valve 132, which is a valve that can adjust its opening degree according to the dust concentration detected by the dust concentration sensor and / or the pressure value detected by the third pressure sensor 301, so as to maintain the dynamic and stable control of the pressure inside the first feeder 300 and suppress the dust concentration inside the first feeder 300.

[0066] Optionally, such as Figure 1 or Figure 2 As shown, the biomass gasification feeding system also includes: a first flow sensor 113 and a second flow sensor 133; the first flow sensor 113 is located in the second conveying path between the first regulating valve 112 and the first air inlet 501, and the second flow sensor 133 is located in the second conveying path between the second regulating valve 132 and the second air inlet 302.

[0067] Specifically, the first flow sensor 113 is located in the second conveying path between the first regulating valve 112 and the first air inlet 501, and is used to detect the actual sealing air flow from the blower 100 through the first regulating valve 112 to the intermediate chamber 500. By real-time detection of the sealing air flow in this section of the pipeline, it can be determined whether the sealing air flow entering the intermediate chamber 500 meets the expectations, and thus determine whether the current opening setting of the first regulating valve 112 is appropriate. The second flow sensor 133 is located in the second conveying path between the second regulating valve 132 and the second air inlet 302, and is used to detect the actual sealing air flow from the blower 100 through the second regulating valve 132 to the first feeder 300. By real-time detection of the sealing air flow in this section of the pipeline, it can be determined whether the sealing air flow entering the first feeder 300 meets the expectations, and thus determine whether the current opening setting of the first regulating valve 112 is appropriate.

[0068] The technical effect of this application embodiment is that the actual sealing gas flow rate is directly measured by the flow sensor, and then the opening degree of each regulating valve is calculated so that the pressure of the first feeder and / or intermediate silo meets the requirements, thereby further improving the dynamic stability control level of the pressure in the intermediate silo.

[0069] Optionally, the biomass gasification feeding system further includes a control unit, which is communicatively connected to a first pressure sensor 502, a second pressure sensor 701, a dust concentration sensor, a first flow sensor 113, and a second flow sensor 133. The control unit adjusts the opening of the first regulating valve 112 and / or the second regulating valve 132 based on the data detected by these sensors.

[0070] Optionally, such as Figure 1 or Figure 2As shown, the first airlock valve 400, the intermediate chamber 500, and the second airlock valve 600 are arranged sequentially along the direction of gravity.

[0071] Specifically, the first airlock valve 400, the intermediate chamber 500, and the second airlock valve 600 are arranged sequentially along the direction of gravity, that is, the components are arranged from top to bottom in the direction of gravity to form a biomass material conveying path with gravity as the main driving force.

[0072] Biomass material falls from the first feeder 300 into the first airlock valve 400 under gravity. Since the airlock valve typically has rotating blades or flaps inside, this gravity-based arrangement ensures that the biomass material passes quickly and completely through the first airlock valve 400 and falls into the intermediate hopper 500, thus maintaining the effectiveness of its one-way sealing function. Compared to other arrangements without gravity assistance, this method ensures that biomass material does not remain in the valve cavity, avoiding jamming or seal failure.

[0073] The intermediate silo 500 serves as a buffer and pressure stabilization unit, receiving biomass materials at the top and discharging them at the bottom. The intermediate silo 500's arrangement along the direction of gravity ensures uniform flow of biomass materials, reduces the risk of blockage, and helps maintain a stable gas-solid two-phase flow within the silo.

[0074] Subsequently, the biomass material enters the second airlock valve 600 under gravity. The second airlock valve 600 must prevent the syngas from backflowing into the gasifier 800 while simultaneously discharging the biomass material to the second feeder 700 located at the bottom, where the second feeder 700 completes the final feeding into the gasifier 800.

[0075] The technical effect of this application embodiment is that the first airlock valve, the intermediate chamber, and the second airlock valve are arranged sequentially along the direction of gravity, which reduces the exposure time of the gas channel. Combined with the sealing gas, this further improves the dynamic stability control level of the pressure in the intermediate chamber.

[0076] Furthermore, the hopper 200, the first feeder 300, and the second feeder 700 are arranged along the direction of gravity. Specifically, the hopper 200 is at the top, and under the influence of gravity, the biomass material can naturally fall to the first feeder 300 below it without the need for additional lifting or pushing devices, thereby reducing energy consumption and simplifying the structure. The first feeder 300, while quantitatively controlling the flow rate of biomass material, relies on the gravity of the hopper 200 above for supplemental feeding, avoiding interruptions in feeding caused by biomass material bridging or blockage. In addition, even if the first feeder 300 and the second feeder 700 adopt a spiral or star-shaped structure, gravity-assisted feeding can significantly reduce their driving load and improve the uniformity of feeding.

[0077] Optionally, such as Figure 1 or Figure 2As shown, the first feeder 300 and the second feeder 700 are screw feeders.

[0078] Specifically, a screw feeder mainly consists of rotating helical blades. When the helical blades rotate, they push the biomass material on them to move axially, thereby achieving continuous material conveying. Screw feeders have advantages such as precise control, excellent sealing performance, strong adaptability, and easy maintenance.

[0079] The first feeder 300 is a screw feeder, ensuring that biomass materials enter the intermediate silo 500 at a stable rate. Its excellent sealing properties, combined with the first airlock valve 400, create a positive pressure barrier. The second feeder 700 is also a screw feeder, ensuring that biomass materials enter the gasifier 800 at a stable rate, preventing fluctuations in the gasification process due to uneven material supply. Furthermore, the positive pressure environment maintained inside the second feeder 700 further enhances its protection against syngas backflow.

[0080] The technical effect of this application embodiment is that by using the screw feeder as the first feeder and the second feeder, a stable and continuous supply of biomass materials is ensured between the biomass gasification feeding system, and the dynamic stability control level of the pressure in the intermediate silo is further improved.

[0081] Optionally, such as Figure 1 or Figure 2 As shown, the blower 100 also has a third outlet 131, and the blower 100 can output inert gas through the first outlet 111, the second outlet 121 and the third outlet 131.

[0082] Specifically, inert gases such as nitrogen and carbon dioxide, compared to non-inert gases like air, do not react prematurely with biomass materials. The blower 100 injects inert gas into the intermediate silo 500 through the first air inlet 501 and simultaneously injects inert gas into the first feeder 300 through the second air inlet 302. This pressurizes and seals the interiors of the intermediate silo 500 and the first feeder 300, creating a positive pressure within the intermediate silo 500 and the second feeder 700 that is maintained above a preset operating pressure range for the gasifier 800. This prevents flammable and explosive syngas from flowing backwards into the second feeder 700 and the intermediate silo 500 during normal operation or pressure fluctuations in the gasifier 800, and also suppresses dust within the first feeder 300, improving the continuity and stability of biomass material transport.

[0083] The technical effect of this application embodiment is that by outputting inert gas through a blower and introducing the inert gas into the intermediate silo and the first feeder, the synthesis gas in the gasifier is prevented from flowing upstream along the feeding path, and the dust concentration in the first feeder is suppressed.

[0084] Figure 3 This is a flowchart illustrating the control method for a biomass gasification feeding system provided in an embodiment of this application. This application also provides a control method for a biomass gasification feeding system, such as... Figure 3 As shown, the method includes: S301: Input biomass materials into the silo, start the first feeder and the second feeder, and open the first airlock valve and the second airlock valve.

[0085] Specifically, the biomass material stored in the silo is pushed by the first feeder and enters the intermediate silo for temporary storage through the first airlock valve. The biomass material in the intermediate silo then passes through the second airlock valve and is continuously fed into the gasifier by the second feeder.

[0086] S302: Open the first regulating valve and keep the first regulating valve open throughout the process.

[0087] Specifically, the blower introduces sealing gas into the intermediate silo, using the pressure difference to prevent the syngas in the gasifier from flowing back into the second feeder and upstream equipment, ensuring that the intermediate silo and the second feeder are in a positive pressure environment, and ensuring that the biomass material transportation is not disturbed by the syngas.

[0088] S303: Open the first pressure relief valve and the second pressure relief valve, and keep the first pressure relief valve and the second pressure relief valve open throughout the process.

[0089] S304: Activate the first pressure sensor and the second pressure sensor, and adjust the opening degree of the first regulating valve and / or the second regulating valve according to the pressure difference detected by the first pressure sensor and the second pressure sensor.

[0090] Specifically, when the pressure difference detected by the first pressure sensor and the second pressure sensor is lower than a preset safety threshold, the opening of the first regulating valve is increased; further, if the pressure is still insufficient, the opening of the second regulating valve is decreased until it is closed.

[0091] When the pressure difference detected by the first pressure sensor and the second pressure sensor is higher than the preset safety threshold, the opening of the first regulating valve is reduced; further, if the pressure is still too high, the opening of the second regulating valve is increased until it is fully open.

[0092] Optionally, after executing S303, you can continue to execute S305.

[0093] S305: Turn on the dust concentration sensor and adjust the opening of the second regulating valve according to the dust concentration detected by the dust concentration sensor.

[0094] This application also provides a specific example, including: In the specific implementation of the biomass gasification feeding system for straw gasification, the straw used is crushed to a length of 3cm-8cm, with a moisture content of less than 20% and a bulk density of 150kg / m³. When starting the biomass gasification feeding system, straw is fed into the silo, and the first and second feeders operate synchronously. The first and second airlock valves are opened, and the initial feed rate is controlled within 400kg / h.

[0095] Adjusting the initial opening of the first regulating valve allows the blower to introduce inert gas into the intermediate chamber, stabilizing the pressure value of the first pressure sensor at 30 kPa and the pressure value of the second pressure sensor at 20 kPa-25 kPa, thus creating an effective pressure difference to prevent backflow of syngas. Furthermore, when dust (concentration greater than 8 mg / m³) occurs during silo replenishment, the second regulating valve automatically opens, and the dust concentration drops below 1.5 mg / m³ after 25 seconds, ensuring smooth feeding.

[0096] During operation, if the reading of the second pressure sensor rises from 0 kPa to 10 kPa, the control unit of the biomass gasification feeding system increases the opening of the first regulating valve, while the first pressure relief valve maintains a 15% opening throughout and automatically vents, ensuring the stability of the biomass gasification feeding system. After 10 hours of continuous operation, the biomass gasification feeding system did not experience syngas backflow, the pressure difference between the intermediate silo and the second feeder remained stable at 5 kPa-10 kPa, the dust concentration at the first feeder was less than 2 mg / m³, and the pressure fluctuation of the first feeder was less than ±1 kPa, representing an 80% improvement over existing technologies, with no feeding jamming or equipment wear.

[0097] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0098] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A biomass gasification feeding system for conveying biomass materials to a gasifier, characterized in that, include: A blower (100), and a hopper (200), a first feeder (300), a first airlock valve (400), an intermediate hopper (500) and a second airlock valve (600) are arranged sequentially and connected end to end along the positive direction of the first conveying path of the biomass material. The outlet of the second airlock valve (600) is used to connect to the inlet of the gasifier. Both the first airlock valve (400) and the second airlock valve (600) are valves that allow unidirectional flow in the positive direction. The intermediate chamber (500) is provided with a first air inlet (501), which is located in the area between the feed inlet and the discharge outlet of the intermediate chamber (500). The blower (100) has a first air outlet (111) and a second air outlet (121). The first air outlet (111) is connected to the first air inlet (501) through a first regulating valve (112), and the second air outlet (121) is connected to the atmospheric environment through a first pressure relief valve (122). The first regulating valve (112) is a valve that can adjust its own opening degree.

2. The biomass gasification feeding system according to claim 1, characterized in that, Also includes: First pressure sensor (502) and second pressure sensor (701); The first pressure sensor (502) is located inside the intermediate chamber (500), and the second pressure sensor (701) is located in the first conveying path between the second airlock valve (600) and the gasifier. Both the first pressure sensor (502) and the second pressure sensor (701) are used to detect the pressure in the corresponding area. The first regulating valve (112) is a valve that can adjust its opening degree according to the pressure difference detected by the first pressure sensor (502) and the second pressure sensor (701).

3. The biomass gasification feeding system according to claim 2, characterized in that, Also includes: Second feeder (700); The feed inlet of the second feeder (700) is connected to the discharge outlet of the second airlock valve (600), the discharge outlet of the second feeder (700) is used to connect to the feed inlet of the gasifier, and the second pressure sensor (701) is located in the first conveying path of the second feeder (700).

4. The biomass gasification feeding system according to claim 2 or 3, characterized in that, The blower (100) also has a third air outlet (131); The third air outlet (131) is connected to the air inlet of the hopper (200), the air inlet of the first feeder (300), and any one of the atmospheric environment via the second regulating valve (132); The second regulating valve (132) is a valve that can increase its opening degree when the pressure value detected by the first pressure sensor (502) is greater than a preset threshold.

5. The biomass gasification feeding system according to claim 4, characterized in that, Also includes: Dust concentration sensor; The dust concentration sensor is located in the first conveying path of the first feeder (300), and the dust concentration sensor is used to detect the dust concentration in the first feeder (300); The first feeder (300) is provided with a second air inlet (302) and a fourth air outlet (303). The third air outlet (131) is connected to the second air inlet (302) through the second regulating valve (132). The second regulating valve (132) can also adjust its opening degree according to the dust concentration. The fourth air outlet (303) is connected to the atmospheric environment through the second pressure relief valve (304).

6. The biomass gasification feeding system according to claim 5, characterized in that, The second air inlet (302) is located on the side of the first feeder (300) near the feed port of the first feeder (300), and the second pressure relief valve (304) is located on the side of the first feeder (300) near the discharge port of the first feeder (300).

7. The biomass gasification feeding system according to claim 5, characterized in that, Also includes: First flow sensor (113) and second flow sensor (133); The first flow sensor (113) is located in the second delivery path between the first regulating valve (112) and the first air inlet (501), and the second flow sensor (133) is located in the second delivery path between the second regulating valve (132) and the second air inlet (302).

8. The biomass gasification feeding system according to claim 3, characterized in that, The first airlock valve (400), the intermediate chamber (500), and the second airlock valve (600) are arranged sequentially along the direction of gravity.

9. The biomass gasification feeding system according to claim 3, characterized in that, The first feeder (300) and the second feeder (700) are screw feeders.

10. The biomass gasification feeding system according to claim 1, characterized in that, The blower (100) also has a third outlet (131), and the blower (100) can output inert gas through the first outlet (111), the second outlet (121) and the third outlet (131).

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