Biomass gasification feeding system

Abstract

The utility model provides a biomass gasification feeding system. The biomass gasification feeding system comprises a storage bin, a feeder and a sealing mechanism, the storage bin is used for storing materials. The bottom of the storage bin is provided with a mechanical collecting mechanism and a feeding port communicated with the interior of the mechanical collecting mechanism. And a charging hole of the feeder is communicated with the feeding hole through a blanking pipeline and a pneumatic gate valve. A feeding port of the sealing mechanism is directly connected with a discharging port of the feeding machine through a discharging pipeline, and a conveying port of the sealing mechanism is communicated with a feeding port of the biomass gasification furnace so that materials in the feeding machine can be continuously conveyed to the biomass gasification furnace in the forward direction. The sealing mechanism further comprises a plurality of sealing gas inlets which are annularly distributed, and the sealing gas inlets are used for being connected with an external inert sealing gas source. The sealing mechanism is coupled with mechanical motive seal through gas seal, and positive pressure higher than the preset numerical value interval of the operation pressure of the biomass gasifier is maintained in the sealing mechanism, so that flammable and explosive gas in the biomass gasifier is prevented from flowing back to the feeder and the storage bin when the biomass gasifier operates normally or pressure fluctuation occurs.

Description

Technical Field

[0001] The utility model relates to the technical field of biomass energy, in particular to a biomass gasification feeding system. Background Art

[0002] The biomass gasification process converts agricultural and forestry waste biomass into fuel gas or syngas feedstock for chemical synthesis through partial oxidation and reduction reactions between the biomass feedstock and gasifying agents such as air, oxygen-enriched air, oxygen, and water vapor under high temperature conditions. A stable feed system that can adapt to different biomass feedstock forms and gasifier operating pressures is the prerequisite and foundation for the long-term, safe, and stable operation of biomass gasification units. As a key component of the biomass gasification system, a reliable and stable feed system plays a vital role in the stable operation of the gasification unit, the stability of the fuel gas and syngas components, and the regulation of operating loads.

[0003] At present, the fuel feed port of a biomass circulating fluidized bed gasifier is generally designed to be located on the side of the furnace body. During the operation of the biomass circulating fluidized bed gasifier, air is often supplied from the bottom of the furnace body to the interior, allowing the biomass to undergo a full pyrolysis and gasification reaction in the furnace to produce combustible gas. During the above process, the gasification temperature inside the furnace of the biomass circulating fluidized bed gasifier will reach as high as 850°C, and the furnace maintains a positive pressure of approximately 10kPa during operation, which makes it easy for gas leakage to occur. Therefore, the sealing performance of the biomass circulating fluidized bed gasifier is required to be high. If the feed part of the biomass circulating fluidized bed gasifier is not tightly sealed, it is easy for gas to flow back into the silo, which is very likely to cause a fire or explosion accident. Utility Model Content

[0004] The purpose of the utility model is to provide a biomass gasification feeding system which can prevent the backflow of combustible gas.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] According to one aspect of the present application, the present application provides a biomass gasification feeding system for conveying materials to a biomass gasifier, the biomass gasification feeding system comprising:

[0007] A storage silo is used to store materials; the bottom of the storage silo is provided with a mechanical material collection mechanism and a material feeding port communicating with the interior thereof;

[0008] A feeder having a feeding port and a discharging port, wherein the feeding port is connected to the feeding port of the storage bin through a discharging pipeline and a pneumatic gate valve, and the feeder is used to transport materials to the downstream biomass gasifier;

[0009] A sealing mechanism having an inlet and a delivery port, wherein the inlet is directly connected to the discharge port of the feeder via a discharge pipeline, and the delivery port is connected to the feed port of the biomass gasifier, and the sealing mechanism is used to achieve continuous and positive conveying of the material in the feeder to the biomass gasifier; the sealing mechanism also includes a plurality of sealing air inlets distributed in an annular manner, and the sealing air inlets are used to connect to an external inert sealing air source;

[0010] The sealing mechanism couples the mechanical dynamic seal through the air seal, and maintains a positive pressure in the sealing mechanism that is higher than the preset numerical range of the operating pressure of the biomass gasifier, thereby preventing the flammable and explosive gases in the biomass gasifier from flowing back to the feeder and the storage bin when the biomass gasifier is operating normally or pressure fluctuations occur.

[0011] In some embodiments, the sealing mechanism is a single-stage one; or the sealing mechanism is a two-stage one or more-stage one, and the two-stage one or more-stage sealing mechanisms are connected in series or in parallel.

[0012] The sealing mechanism includes a shell, a sealing material feeding member and a driving member. The sealing material feeding member is arranged inside the shell. The sealing material feeding member divides the interior of the shell into 4 to 20 mutually isolated accommodating chambers, and each of the accommodating chambers is used to communicate with the feed port, the feed port, and the sealing air inlet; the axial end of the sealing material feeding member is sealed with the end of the shell; the driving member is arranged outside the shell, and the driving member is connected to the sealing material feeding member for driving the sealing material feeding member to rotate.

[0013] In some embodiments, the sealing air inlet includes an upper air inlet and a lower air inlet, and the upper air inlet and the lower air inlet are respectively arranged at opposite ends of the shell in the horizontal direction; the upper air inlet is located above the lower air inlet;

[0014] The gasifier feeding system further includes a sealing gas supply device, which is in communication with both the upper air inlet and the lower air inlet and is used to deliver inert sealing gas into the accommodating chamber.

[0015] In some embodiments, the sealed material conveying member includes a rotating shaft and an impeller, and the impeller is connected to an external driving member via the rotating shaft;

[0016] A dynamic sealing redundancy is reserved between the radial outer periphery of the impeller and the inner peripheral wall of the housing.

[0017] In some embodiments, the two ends of the feeder are respectively a first end and a second end, the feeding port is located at the first end, and the discharging port is located at the second end;

[0018] The feeder is tilted upward from the first end to the second end, so that the discharge port is located above the feeding port and is connected to the feeding port through a cylindrical sealed cavity that can accommodate materials.

[0019] In some embodiments, the horizontal inclination angle of the feeder is 0° to 45°;

[0020] The vertical distance between the feeding port and the discharging port is greater than 50 cm.

[0021] In some embodiments, the feeder includes a housing, a screw conveying mechanism, and an external drive mechanism. The interior of the housing is hollow and forms a receiving cavity. The feeding port and the discharge port are both in communication with the receiving cavity. The screw conveying mechanism extends axially along the housing. The screw conveying mechanism is disposed in the receiving cavity and is rotatably connected to a bearing on the housing. The screw conveying mechanism is connected to an end of the housing via a mechanical dynamic seal. The drive mechanism is connected to the screw conveying mechanism for driving the screw conveying mechanism to operate.

[0022] When there are multiple spiral conveying mechanisms, the multiple spiral conveying mechanisms are distributed in parallel in the container along the axial direction of the shell; among any two adjacent spiral conveying mechanisms, one of the spiral conveying mechanisms rotates in the clockwise direction, and the other spiral conveying mechanism rotates in the counterclockwise direction.

[0023] In some embodiments, the biomass gasification feeding system includes a loosening mechanism, which is provided on the storage bin and loosens the material in the storage bin by means of high-pressure gas pulses or medium- and high-frequency mechanical vibrations, and / or the loosening mechanism sprays inert loosening gas and fluidizing air into areas in the storage bin where material arching is likely to occur through an annular pipeline and multiple nozzles distributed circumferentially on the annular pipeline.

[0024] In some embodiments, the material delivery port of the sealing mechanism is connected to one or more material delivery pipelines, and the material delivery pipelines are used to connect the material delivery port of the sealing mechanism with the feed port of the biomass gasifier;

[0025] The feed pipeline includes a directly connected vertical pipe section and an inclined pipe section, the vertical pipe section extends vertically, and one end of the vertical pipe section away from the inclined pipe section is connected to the feed port of the sealing mechanism; the end of the inclined pipe section away from the vertical pipe section is connected to the feed port of the biomass gasifier; the inclined pipe section is inclined downward from the vertical pipe section to the biomass gasifier;

[0026] The horizontal inclination angle of the inclined pipe section is greater than 60°.

[0027] In some embodiments, the material delivery pipeline is provided with at least one air inlet communicating with the interior thereof;

[0028] The gasifier feeding system further includes an air supply device, which is communicated with the air inlet and is used to supply loose air into the feeding pipeline.

[0029] In some embodiments, the biomass gasification feeding system further comprises a temperature sensor, which is disposed on the feeding pipeline and is used to detect a temperature signal in the feeding pipeline;

[0030] The biomass gasification feeding system further includes a pressure sensor, which is provided on the feeding pipeline and is used to detect the pressure signal in the feeding pipeline;

[0031] The biomass gasification feeding system further includes a gas detector, which is disposed on the top of the storage bin and is used to detect a combustible gas concentration signal in the storage bin.

[0032] In some embodiments, the biomass gasification feeding system also includes a negative pressure suction device arranged at the top, which is connected to the discharge port end of the feeder near the discharge port and is used to absorb a small amount of flammable and explosive gas flowing back into the feeder and the dust generated during the feeding process.

[0033] In some embodiments, the biomass gasification feeding system further includes a gas processing and dust removal device, which is connected downstream of the negative pressure suction device and is used for combustion processing of the combustible gas absorbed by the negative pressure suction device.

[0034] In some embodiments, the pneumatic gate valve is used to control the opening and closing of the feeding port of the feeder and the feeding port of the storage bin;

[0035] The biomass gasification feeding system further includes a control valve, which is used to control the connection and disconnection between the feeding port of the sealing mechanism and the feeding port of the biomass gasifier;

[0036] The biomass gasification feeding system further includes a controller, which is electrically connected to the pneumatic gate valve, the control valve, the sealing mechanism, and the feeder.

[0037] It can be seen from the above technical solution that the present invention has at least the following advantages and positive effects:

[0038] In the biomass gasification feeding system of the present application, a sealing mechanism is connected at the feed port of the feeder, and the feed port of the sealing mechanism is connected to the feed port of the biomass gasifier, so as to realize the forward conveyance of the material in the storage bin to the biomass gasifier, and to prevent the flammable and explosive gas in the biomass gasifier from reversely passing through the sealing mechanism and entering the feeder, or even entering the storage bin and causing a fire and explosion. In other words, the sealing mechanism can realize the one-way transportation of materials, that is, any material passing through the sealing mechanism can only be transported from the feed port to the feed port, but cannot enter the feed port from the feed port, so that the sealing mechanism has a certain sealing effect, and further, in the process of transporting materials through the sealing mechanism, the combustible gas in the biomass gasifier cannot enter the sealing mechanism. In this way, the sealing mechanism can serve as a measure for preventing the backflow of combustible gas in the biomass gasification feeding system, thereby improving the safety and reliability of the biomass gasification feeding system.

[0039] In addition, the sealing mechanism is coupled with a mechanical dynamic seal through an air seal, and a sealing gas inlet is provided on the sealing mechanism, and an external inert sealing gas source is connected through the sealing gas inlet to inject inert sealing gas into the interior of the sealing mechanism, so that the interior of the sealing mechanism can be pressurized and sealed, and a positive pressure is formed inside the sealing mechanism that is maintained higher than the preset numerical range of the operating pressure of the biomass gasifier. This can prevent the flammable and explosive gases in the biomass gasifier from flowing back into the feeder and the storage bin when the biomass gasifier is operating normally or pressure fluctuations occur, and can also overcome the pressure of the combustible gas in the biomass gasifier, so that the material can pass through the sealing mechanism smoothly, thereby improving the continuity and stability of material transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 Schematic diagram of the structure of the gasification device in this embodiment.

[0041] Figure 2 Schematic diagram of the sealing mechanism in this embodiment.

[0042] The following are the descriptions of the reference numerals:

[0043] 100. Biomass gasification feeding system; 1. Storage silo; 11. Cylinder; 12. Cone; 2. Feeder; 21. First end; 22. Second end; 3. Sealing mechanism; 31. Shell; 311. Feed inlet; 312. Feed port; 313. Upper air inlet; 314. Lower air inlet; 32. Sealing feed member; 4. Loosening mechanism; 51. Feed pipeline; 511. Vertical pipe section; 512. Oblique pipe section; 52. Air supply pipeline; 61. Pneumatic gate valve; 62. Control valve; 7. Air supply equipment; 8. Negative pressure suction equipment; 9. Gas treatment and dust removal equipment; 10. Temperature sensor; 20. Pressure sensor; 30. First material detector; 40. Second material detector; 50. Third material detector; 60. Gas detector; 200. Biomass gasifier. DETAILED DESCRIPTION

[0044] Typical embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention is capable of various variations in different embodiments without departing from the scope of the present invention, and that the descriptions and illustrations herein are intended to be illustrative in nature and not to limit the present invention.

[0045] In the description of this application, it should be understood that in the embodiments shown in the drawings, indications of directions or positional relationships (such as up, down, left, right, front, and back) are merely for the convenience of describing this application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed, or operate in a specific orientation. These descriptions are appropriate when these elements are in the positions shown in the drawings. If the descriptions of the positions of these elements change, the indications of these directions will also change accordingly.

[0046] Furthermore, 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 the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the described features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0047] The present application provides a biomass gasification feeding system for delivering biomass fuel to a biomass gasifier arranged downstream thereof. The biomass gasifier is used to gasify materials to generate combustible gas.

[0048] Specifically, the biomass gasifier has a feed port for connecting the interior of the biomass gasifier with the biomass gasification feed system.

[0049] The material conveyed by the biomass gasification feeding system is biomass raw material. For example, the biomass raw material can be biomass pellets, biomass briquettes, wood chips, twig slices, etc. Since these biomass raw materials have high surface friction and poor fluidity, which easily lead to arching and blockage during transportation, the present application optimizes and improves the structure of the biomass gasification feeding system to improve the smoothness, continuity, and stability of its material transportation.

[0050] The specific embodiment of the biomass gasification feeding system in this embodiment is described in detail below with reference to the accompanying drawings.

[0051] Figure 1 Schematic diagram of the structure of the biomass gasification feeding system in this embodiment.

[0052] refer to Figure 1 The biomass gasification feeding system 100 includes a storage bin 1, a feeder 2, and a sealing mechanism 3. The storage bin 1 is used to store materials. A mechanical collecting mechanism and a feed port connected to the interior of the storage bin 1 are provided at the bottom of the storage bin 1. The feeder 2 has a feeding port and a discharge port, and the feeding port is connected to the feed port of the storage bin 1 through a discharge pipeline and a pneumatic gate valve 61. The feeder 2 is used to transport materials to the downstream biomass gasifier 200. The sealing mechanism 3 has an inlet 311 and a delivery port 312. The inlet 311 is directly connected to the discharge port of the feeder 2 through a discharge pipeline, and the delivery port 312 is connected to the feed port of the biomass gasifier 200. The sealing mechanism 3 is used to realize continuous and positive transportation of the material in the feeder 2 to the biomass gasifier 200. The sealing mechanism also includes a plurality of sealing gas inlets distributed in an annular manner, and the sealing gas inlet is used to connect to an external inert sealing gas source. The sealing mechanism couples the mechanical dynamic seal through the air seal and maintains a positive pressure in the sealing mechanism that is higher than the preset numerical range of the operating pressure of the biomass gasifier 200, thereby preventing the flammable and explosive gases in the biomass gasifier 200 from flowing back to the feeder and the storage bin 1 when the biomass gasifier 200 is operating normally or when pressure fluctuations occur.

[0053] In the above-mentioned biomass gasification feeding system 100, a sealing mechanism 3 is connected at the discharge port of the feeder 2, and the feed port 312 of the sealing mechanism 3 is connected with the feed port of the biomass gasifier 200, so as to realize the forward conveyance of the material in the storage bin 1 to the biomass gasifier 200, and to prevent the flammable and explosive gas in the biomass gasifier 200 from passing through the sealing mechanism 3 in the reverse direction and entering the feeder 2, or even entering the storage bin 1 and causing fire and explosion. That is to say, the sealing mechanism 3 can realize one-way transportation of materials, that is, any material passing through the sealing mechanism 3 can only be transported from the feed port 311 to the feed port 312, but cannot enter the feed port 311 from the feed port 312, so that the sealing mechanism 3 has a certain sealing effect, and thus in the process of transporting materials through the sealing mechanism 3, the combustible gas in the biomass gasification furnace 200 cannot enter the sealing mechanism 3, so that the sealing mechanism 3 can be used as a measure for preventing the backflow of combustible gas in the biomass gasification feeding system 100, so as to improve the safety and reliability of the biomass gasification feeding system 100.

[0054] In addition, the sealing mechanism is coupled with a mechanical dynamic seal through an air seal, and by arranging an air inlet on the sealing mechanism 3 and connecting an external inert sealing gas source through the sealing gas inlet to inject inert sealing gas into the interior of the sealing mechanism 3, the interior of the sealing mechanism 3 can be pressurized and sealed, and a positive pressure is formed inside the sealing mechanism 3 that is maintained higher than the preset numerical range of the operating pressure of the biomass gasifier 200. This can prevent the flammable and explosive gases in the biomass gasifier 200 from flowing back into the feeder 2 and the storage bin 1 when the biomass gasifier 200 is operating normally or pressure fluctuations occur, and can also overcome the pressure of the combustible gas in the biomass gasifier 200, so that the material can pass through the sealing mechanism 3 smoothly, thereby improving the continuity and stability of material transportation.

[0055] In this embodiment, the storage bin 1 is hollow inside and is used to store materials.

[0056] The upper end of the storage bin 1 is provided with a feed port communicating with the interior thereof for adding materials into the storage bin 1. Specifically, the feed port is located at the top of the storage bin 1. The biomass gasification feeding system 100 further includes a feed conveying device, which is connected to the feed port of the storage bin 1 to convey materials into the storage bin 1 through the feed port.

[0057] The bottom of the storage bin 1 is provided with a feeding port communicating with the interior thereof, for conveying the material in the storage bin 1 outwards.

[0058] A mechanical material collection mechanism is provided at the bottom of the storage bin 1, which rolls the material in the storage bin 1 to the feed port in a spiral manner to facilitate unloading of the storage bin 1. For example, the mechanical material collection mechanism can be an activated hopper, or a sweeper, or a discharge spiral, such as CN218201098U.

[0059] In this embodiment, the storage bin 1 includes a cylindrical portion 11 and a conical portion 12. The inner diameter of the cylindrical portion 11 is consistent from top to bottom. The conical portion 12 is connected to the bottom of the cylindrical portion 11, and the feed port is located at the bottom of the conical portion 12.

[0060] The inner diameter of the cone portion 12 decreases gradually from top to bottom, that is, this embodiment sets the storage bin 1 as a structure with different wall angles, which is conducive to the falling of materials, prevents arching and blockage problems, and facilitates improving the smoothness and continuity of the discharge of materials from the storage bin 1.

[0061] In other embodiments, the storage bin 1 may also include only the cylindrical portion 11, in which case the feed port is located at the bottom of the cylindrical portion 11. Alternatively, the storage bin 1 may also include only the conical portion 12, depending on the specific configuration.

[0062] refer to Figure 1 The feeder 2 has a feeding port and a discharging port. The feeding port is connected to the feeding port through a discharging pipeline and a pneumatic gate valve 61 for material transportation. Specifically, the pneumatic gate valve 61 is installed on the discharging pipeline to control the on-off of the discharging pipeline, thereby achieving on-off control of the feeding port of the feeder 2 and the discharging port of the storage bin 1.

[0063] In this embodiment, the two opposite ends of the feeder 2 are respectively a first end 21 and a second end 22, the feeding port is located at the first end 21, and the discharge port is located at the second end 22. The feeder 2 is tilted upward from the first end 21 to the second end 22, so that the discharge port is located above the feeding port and is connected to the feeding port through a sealed pipe section that can accommodate the material. In this way, the height of the material accumulated inside the feeder 2 can form a certain material sealing effect, that is, a seal is formed by the retention of the material to form the backflow of the combustible gas, so as to avoid the flammable and explosive gas from flowing back from the discharge port through the feeding port into the storage bin 1 and causing a fire and explosion. That is, the above design can be used as a first measure to prevent the combustible gas from flowing back into the storage bin 1, so as to improve the safety and reliability of the biomass gasification feeding system 100.

[0064] The tilt angle of feeder 2 is determined based on the characteristic parameters of the biomass material. For example, the horizontal tilt angle of feeder 2 is between 0° and 45°, where the tilt angle refers to the angle between feeder 2 and the horizontal plane. Furthermore, the vertical distance between the feed inlet and the discharge inlet is greater than 50 cm, ensuring that the material accumulated within feeder 2 forms a good seal.

[0065] In this embodiment, the feeder 2 can be a dual-axis or multi-axis form, so as to achieve the purpose of uniform material discharge and prevent material accumulation and bridging inside the feeder 2. The feeder 2 can also be a single-axis form.

[0066] In this embodiment, the feeder 2 includes a housing, at least one screw conveying mechanism and a driving member.

[0067] The interior of the shell is hollow and forms a containing cavity, and the feeding port and the unloading port are both communicated with the containing cavity.

[0068] The screw conveying mechanism extends along the length direction of the shell, is arranged in the accommodating cavity and is rotatably connected to the bearing on the shell, and conveys the material at the feeding port to the discharging port during the rotation of the screw conveying mechanism.

[0069] The spiral conveying mechanism is connected to the end of the shell through a mechanical dynamic seal to further prevent the combustible gas from flowing back into the storage bin 1.

[0070] Specifically, the screw conveying mechanism includes a screw shaft and a spiral blade. The screw shaft is connected to a bearing on the housing and extends along the length of the housing 31. The spiral blade is spirally arranged along the length of the screw shaft and is sealed to the housing. The spiral blade rotates relative to the housing as the screw shaft rotates, thereby spirally conveying material from the feed port to the discharge port.

[0071] The feeder 2 may be a single-axis or dual-axis or multi-axis feeder depending on the number of screw conveying mechanisms.

[0072] That is, when the feeder 2 employs a dual-axis or multi-axis configuration, multiple screw conveying mechanisms are provided. In this case, the multiple screw conveying mechanisms are distributed radially within the housing within the accommodating chamber. Of any two adjacent screw conveying mechanisms, one rotates clockwise while the other rotates counterclockwise. This allows the adjacent screw conveying mechanisms to squeeze and break material during rotation, thereby achieving uniform material discharge and preventing accumulation and bridging of material within the accommodating chamber.

[0073] When the feeder 2 adopts a single-shaft form, it means that there is only one screw conveying mechanism.

[0074] The driving mechanism is connected to the screw conveying mechanism and is used to drive the screw conveying mechanism to operate.

[0075] In this embodiment, the drive mechanism uses variable frequency control to drive the spiral conveying mechanism to rotate. On the one hand, the feed rate of the feeder 2 itself can be adjusted according to the load of the biomass gasification feeding system 100 and the biomass gasification furnace 200, thereby adjusting the feed rate of the biomass gasification furnace 200. On the other hand, during the process of the drive mechanism's variable frequency control of the spiral conveying mechanism, the feeder 2 will vibrate to ensure uniform, continuous, and stable feeding of the feeder 2. This vibration can also be transmitted to the storage bin 1 to cooperate with the loosening mechanism 4, thereby increasing the external force applied to the storage bin 1 and improving the loosening effect of the material in the storage bin 1, so that the material in the storage bin 1 can smoothly fall to the feed port, thereby further improving the continuity and stability of the discharge of the storage bin 1.

[0076] Figure 2 Schematic diagram of the structure of the sealing mechanism 3 in this embodiment.

[0077] refer to Figure 1 and Figure 2 In this embodiment, the sealing mechanism 3 includes a housing 31, a sealing material feeding member 32 and a driving member.

[0078] The sealed material feed member 32 is located within the housing 31 and divides the interior of the housing 31 into 4 to 20 isolated cavities. The sealed material feed member is rotatably connected to the housing 31, enabling unidirectional material transport through rotation of the material feed member 32 relative to the housing 31. The axial ends of the sealed material feed member 32 are sealed to the ends of the housing 31.

[0079] In this embodiment, the sealed material feeding member 32 includes a rotating shaft and an impeller, which is rotatably connected to the housing 31 via the rotating shaft. Specifically, the impeller includes a plurality of blades, which are arranged circumferentially in a circular pattern. Two adjacent blades and the housing 31 enclose a receiving chamber for containing the material.

[0080] In this embodiment, the impeller rotates along the axis of the rotating shaft and maintains the same direction to achieve unidirectional conveying of materials. For example, the impeller can rotate in a clockwise direction or in a counterclockwise direction.

[0081] A redundant dynamic seal is provided between the radial outer periphery of the impeller and the inner circumferential wall of the housing 31 to prevent friction between the radial outer periphery of the impeller and the inner circumferential wall of the housing 31 during rotation, which could easily cause wear on the impeller and ensure the integrity of the impeller. The redundant dynamic seal is filled with material to achieve a material seal between the radial outer periphery of the impeller and the inner circumferential wall of the housing 31, thereby improving the sealing performance of the sealing mechanism 3.

[0082] Specifically, the distance between the outer periphery of the impeller and the inner peripheral wall of the casing 31 is 0.03 to 0.05 mm.

[0083] The drive member is disposed outside the housing 31 and is drivingly connected to the sealed material-feeding member 32, thereby driving the sealed material-feeding member 32 to rotate. For example, the output shaft of the drive member is fixed to a rotating shaft, which passes through the housing 31 and the impeller and is rotatably connected to the housing 31. The rotating shaft is also fixedly connected to the impeller. In actual use, the drive member drives the rotating shaft, causing the impeller to rotate relative to the housing 31.

[0084] refer to Figure 1 and Figure 2 The sealing mechanism 3 has an inlet 311 and a feed port 312. The inlet 311 is connected to the discharge port of the feeder 2, and the feed port 312 is used to communicate with the feed port of the biomass gasifier 200. The sealing mechanism 3 is used to realize the forward transportation of the material in the storage bin 1 to the biomass gasifier 200, and is used to prevent the combustible gas in the biomass gasifier 200 from passing through the sealing mechanism 3 in the reverse direction and entering the storage bin 1 to cause fire and explosion. Each accommodating cavity is communicated with the feed port 311 and the feed port 312. That is to say, in actual application, during the rotation of the impeller of the sealed feed member 32, each accommodating cavity can be communicated with the feed port 311 in turn, so that the material can enter the accommodating cavity between the two adjacent blades through the feed port 311 to realize temporary storage of the material, and when the impeller continues to rotate until it is communicated with the feed port 312, the material is transported to the feed port 312. Since the impeller of the sealed feed member 32 keeps rotating in the same direction, one-way transportation of the material can be realized, that is, any object passing through the sealing mechanism 3 The material can only be transported from the feed port 311 to the feed port 312, but cannot enter the feed port 311 from the feed port 312, so that the sealing mechanism 3 has a certain sealing effect, and thus in the process of transporting the material through the sealing mechanism 3, the combustible gas in the biomass gasification furnace 200 cannot enter the sealing mechanism 3. In this way, the sealing mechanism 3 can serve as the second measure of the biomass gasification feeding system 100 to prevent the backflow of combustible gas. It cooperates with the feeder 2 to further improve the safety and reliability of the biomass gasification feeding system 100.

[0085] Specifically, the material inlet 311 is located at the top of the shell 31 , and the material outlet 312 is located at the bottom of the shell 31 .

[0086] Specifically, the material delivery port 312 of the sealing mechanism 3 is connected to one or more material delivery pipelines 51 , and the material delivery pipelines 51 are used to connect the material delivery port 312 of the sealing mechanism 3 with the feed port of the biomass gasifier 200 .

[0087] In this embodiment, the feed pipeline 51 includes a directly connected vertical pipe section 511 and an inclined pipe section 512. The vertical pipe section 511 extends vertically, with the end of the vertical pipe section 511 remote from the inclined pipe section 512 communicating with the feed port 312 of the sealing mechanism 3. The end of the inclined pipe section 512 remote from the vertical pipe section 511 communicates with the feed port of the biomass gasifier 200. The inclined pipe section 512 slopes downward from the vertical pipe section 511 to the biomass gasifier 200 to facilitate the smooth descent of material within the inclined pipe section 512 and prevent material bridging and arching.

[0088] In this embodiment, the horizontal inclination angle of the inclined pipe section 512 is greater than 60°, which can achieve a better material feeding effect.

[0089] In this embodiment, the inner diameter of the inclined pipe section 512 can remain consistent from the vertical pipe section 511 to the biomass gasifier 200. In other embodiments, the inner diameter of the inclined pipe section 512 can also gradually increase from the vertical pipe section 511 to the biomass gasifier 200 to prevent material bridging and arching inside the inclined pipe section 512, further improving the smoothness and stability of material transportation.

[0090] In this embodiment, the biomass gasification feeding system 100 further includes a control valve 62, which is used to control the connection between the feed port 312 of the sealing mechanism 3 and the feed port of the biomass gasifier 200. Specifically, the control valve 62 is provided on the feed pipe 51, and controls the connection between the feed port 312 of the sealing mechanism 3 and the feed port of the biomass gasifier 200 by controlling the connection of the feed pipe 51.

[0091] In this embodiment, the sealing mechanism 3 also includes a plurality of sealing gas inlets distributed in an annular manner, each of which is in communication with the interior of the housing 31. The sealing gas inlets are used to connect to an external inert sealing gas source to inject inert sealing gas into the interior of the sealing mechanism 3, thereby pressurizing and sealing the interior of the sealing mechanism 3. A positive pressure is formed inside the sealing mechanism 3 that is maintained above the preset numerical range of the operating pressure of the biomass gasifier 200. This can prevent the flammable and explosive gases in the biomass gasifier 200 from flowing back into the feeder 2 and the storage bin 1 during normal operation of the biomass gasifier 200 or when pressure fluctuations occur, and can also overcome the pressure of the combustible gas in the biomass gasifier 200, allowing the material to pass smoothly through the sealing mechanism 3, thereby improving the continuity and stability of material transportation. In addition, the above design can cooperate with the sealing feeder 32 in the operating state to achieve the airtight coupling mechanical dynamic seal of the sealing mechanism 3, thereby improving the sealing performance of the sealing mechanism 3.

[0092] In this embodiment, the multiple sealing air inlets include two or more upper air inlets 313 distributed along the circumference of the shell and two or more lower air inlets 314 distributed along the circumference of the shell. The upper air inlets 313 and the lower air inlets 314 can each communicate with the accommodating cavity, with the upper air inlets 313 located above the lower air inlets 314.

[0093] Specifically, the upper air inlet 313 is located in the middle of one end of the shell 31 in the horizontal direction along the vertical direction. The upper air inlet 313 is used to allow sealing gas to enter the shell 31. After the sealing gas is injected into the accommodating cavity through the upper air inlet 313, the interior of the shell 31 can be pressurized and sealed, and the shell 31 can be maintained in a high-pressure state. This can prevent the flammable and explosive gases in the biomass gasifier 200 from flowing back into the shell 31 of the sealing mechanism 3, and can also overcome the pressure of the flammable and explosive gases in the biomass gasifier 200, allowing materials to pass through the sealing mechanism 3 smoothly, thereby ensuring the continuity and stability of material transportation.

[0094] The lower air inlet 314 is located at the lower portion of the other horizontal end of the housing 31 in the vertical direction and is used to allow sealing gas to enter the housing 31. After the sealing gas is injected into the accommodating cavity through the lower air inlet 314, the housing 31 can be further pressurized and sealed, further preventing the sealing mechanism 3 from introducing any explosive gas into the housing 31 during material conveying and conveying it upstream through the feed port 311, thereby further ensuring the sealing performance of the sealing mechanism 3.

[0095] Specifically in this embodiment, the biomass gasification feeding system 100 further includes a sealing gas supply device, which is in communication with both the upper gas inlet 313 and the lower gas inlet 314 and is used to deliver inert sealing gas into the accommodating chamber.

[0096] In this embodiment, the sealing gas injected into the sealing mechanism 3 can seal the biomass gasifier 200 at a pressure of up to 0.3 MPa.

[0097] In this embodiment, the sealing mechanism 3 is a single-stage sealing mechanism. Alternatively, the sealing mechanism 3 can be a two-stage sealing mechanism or more, and the two-stage sealing mechanisms 3 or more are connected in series or in parallel.

[0098] refer to Figure 1 In this embodiment, a material loosening mechanism 4 is provided on the storage bin 1 and is used to drive the storage bin 1 to vibrate, thereby applying an external force to the storage bin 1. Under the action of the external force, the material in the storage bin 1 can smoothly fall to the feed port and pass through the feed port smoothly. This can prevent the material from arching, bridging, or clogging at the feed port of the storage bin 1, thereby ensuring the continuity, stability, and reliability of material transportation in the biomass gasification feeding system 100. Specifically, the material loosening mechanism 4 transmits vibration to the storage bin 1 through medium and high frequency mechanical vibration.

[0099] In this embodiment, the material loosening mechanism 4 is provided at the lower end of the storage bin 1 near the feeding port. Specifically, the material loosening mechanism 4 is located on the cone portion 12.

[0100] In this embodiment, the loosening mechanism 4 is an electromagnetic vibrator, an electric vibrator or a pneumatic vibrator.

[0101] In other embodiments, the loosening mechanism 4 communicates with the interior of the storage bin 1 via an annular pipeline and multiple nozzles distributed circumferentially along the annular pipeline. In this case, the loosening mechanism 4 injects inert loosening air, fluidizing air, or the like into areas of the storage bin 1 prone to arching, thereby loosening the material within the storage bin 1 and allowing it to smoothly fall to the feed port. In other words, the feed mechanism 4 can also loosen the material within the storage bin 1 using high-pressure gas pulses.

[0102] refer to Figure 1 In this embodiment, the biomass gasification feeding system 100 further includes an air supply device 7, which is in communication with the feed pipeline 51 and is used to supply loose air into the feed pipeline 51 to cool the combustible gas that flows back into the feed pipeline 51, thereby reducing the temperature inside the feed pipeline 51, thereby preventing the sealing effect of the sealing mechanism 3 from being deteriorated due to excessive temperature, thereby ensuring the sealing performance of the sealing mechanism 3. In addition, supplying loose air into the feed pipeline 51 can also disperse the material in the feed pipeline 51 to prevent the material from agglomerating and clogging in the feed pipeline 51, thereby ensuring the smoothness of the material passing through the feed pipeline 51. Specifically, the feed pipeline 51 is provided with an air inlet that is in communication with the interior thereof, and the air supply device 7 is in communication with the air inlet through the air supply pipeline 52.

[0103] In this embodiment, the loosening air can be compressed air, nitrogen, carbon dioxide or inert gas.

[0104] In this embodiment, the biomass gasification feeding system 100 further includes a negative pressure suction device 8, which is disposed near the discharge port of the feeder 2 and is used to absorb a small amount of flammable and explosive gases that flow back into the feeder 2, as well as dust generated during the feeding process, thereby preventing the flammable and explosive gases and dust generated during the feeding process from flowing back into the storage bin 1. In other words, the negative pressure suction device 8, as a third measure to prevent the backflow of flammable and explosive gases into the storage bin 1, can cooperate with the feeder 2 and the sealing mechanism 3 to further improve the safety and reliability of the biomass gasification feeding system 100.

[0105] In this embodiment, the negative pressure suction device 8 may adopt a bag-type dust removal mechanism.

[0106] Biomass gasification feeding system 100 also includes a gas treatment and dust removal device 9, which is connected downstream of the negative pressure suction device 8 and is used to burn and process the combustible gas absorbed by the negative pressure suction device 8. In other words, the negative pressure suction device 8 and the gas treatment and dust removal device 9 cooperate to achieve centralized treatment of flammable and explosive gases that are backflowing.

[0107] The biomass gasification feeding system 100 also includes a controller, which is electrically connected to the pneumatic plug-in valve 61, the control valve 62, the feeder 2, the sealing mechanism 3, the loosening mechanism 4, the air supply equipment 7, the negative pressure suction equipment 8, and the gas treatment and dust removal equipment 9, and can control the opening and closing of the pneumatic plug-in valve 61, the control valve 62, the feeder 2, the sealing mechanism 3, the loosening mechanism 4, the air supply equipment 7, the negative pressure suction equipment 8, and the gas treatment and dust removal equipment 9.

[0108] The controller is also electrically connected to the feeding device for controlling the opening and closing of the feeding device, so as to enable the feeding device to automatically feed the biomass gasification feeding system 100 , thereby improving the automation of material replenishment.

[0109] The biomass gasification feeding system 100 further includes a temperature sensor 10, which is disposed on the feeding pipeline 51 and is used to detect a temperature signal in the feeding pipeline 51. The temperature sensor 10 is electrically connected to the controller and can transmit the detected temperature signal to the controller.

[0110] The biomass gasification feeding system 100 further includes a pressure sensor 20, which is provided on the feeding pipeline 51 and is used to detect a pressure signal in the feeding pipeline 51. The pressure sensor 20 is electrically connected to the controller and can transmit the detected pressure signal to the controller.

[0111] The biomass gasification feeding system 100 further includes a first material detector 30, which is located at the lower end of the storage bin 1 and is used to detect a low material level signal within the bin. The first material detector 30 is electrically connected to the controller and can transmit the detected low material level signal to the controller.

[0112] The biomass gasification feeding system 100 further includes a second material detector 40, which is located at the upper end of the storage bin 1 and is used to detect a high material level signal within the bin. The second material detector 40 is electrically connected to the controller and can transmit the detected high material level signal to the controller.

[0113] The biomass gasification feeding system 100 further includes a third material detector 50 . The third material detector 50 is disposed at the upper end of the storage bin 1 and above the second material detector 40 , and is used to detect a limit material level signal in the bin.

[0114] In this embodiment, the third material detector 50 mainly serves as a backup detector, which can play a bottom-up detection role when the second material detector 40 fails, preventing the excessive amount of material in the storage bin 1 from rushing to the top and blocking the loading port at the top of the storage bin 1. It can also avoid the excessive amount of material in the storage bin 1 causing discharge pressure at the bottom feed port of the storage bin 1, thereby ensuring the feeding stability of the entire biomass gasification feeding system 100.

[0115] The third material detector 50 is electrically connected to the controller and can transmit the detected limit material level signal to the controller.

[0116] In this embodiment, the first material detector 30 , the second material detector 40 , the third material detector 50 , the material conveying device, and the controller cooperate to achieve automatic material replenishment of the material storage bin 1 .

[0117] The first material detector 30 , the second material detector 40 , and the third material detector 50 may be respectively one of a rotary paddle level meter, an ultrasonic level meter, and a weight level meter.

[0118] Biomass gasification feeding system 100 also includes a gas detector 60, located on top of storage silo 1. This gas detector 60 is used to detect combustible gas concentration signals within storage silo 1. This facilitates real-time monitoring of the combustible gas concentration within storage silo 1 and facilitates emergency response when the combustible gas concentration exceeds the specified level. Gas detector 60 is electrically connected to a controller and transmits the detected combustible gas concentration signal to the controller.

[0119] Specifically, the gas detector 60 includes a detection module and an alarm module. The detection module is used to detect the combustible gas concentration signal in the storage bin 1. The detection module is communicatively connected to the alarm module. The alarm module is preset with a combustible gas concentration value. When the combustible gas concentration signal exceeds the combustible gas concentration value, the alarm module issues an alarm signal to alert staff.

[0120] Alternatively, the detection module is communicatively connected to the alarm module, and both the detection module and the alarm module are electrically connected to the controller. A combustible gas concentration value is preset in the controller. When the combustible gas concentration signal received by the controller is higher than the combustible gas concentration value, the controller controls the alarm module to send an alarm signal to alert the staff.

[0121] In this embodiment, a catalytic combustion type or infrared absorption type fixed combustible gas detector can be selected as the gas detector 60 according to the composition of the combustible gas, both of which can quickly and accurately detect the combustible gas content in the storage bin 1 to ensure the safety of the storage bin 1.

[0122] The working principle of the above-mentioned biomass gasification feeding system 100 is as follows:

[0123] The controller is preset with a temperature preset value, a pressure preset value, a low material level preset value, a high material level preset value, and a limit material level preset value.

[0124] The controller controls the low material level signal detected by the first material detector 30, the high material level signal detected by the second material detector 40, and the limit material level signal detected by the third material detector 50. When the low material level signal received by the controller is less than the low material level preset value, or when the high material level signal received by the controller is greater than the low material level preset value and less than the high material level preset value, the controller issues a command to control the feeding device to load material into the storage bin 1, and controls the feeding device to shut down when the high material level signal received by the controller is equal to the high material level preset value.

[0125] Exception: When the second detector fails to work during the process of the feeding equipment conveying materials into the storage bin 1, when the controller receives the limit material level signal detected by the third material detector 50 equal to the limit material level preset value, the feeding equipment is urgently controlled to shut down and stop feeding.

[0126] The controller controls the pneumatic gate valve 61, the control valve 62, the feeder 2, the sealing mechanism 3, the loosening mechanism 4, the air supply equipment 7, the negative pressure suction equipment 8, and the gas treatment and dust removal equipment 9 to start, so that the material in the storage bin 1 can smoothly pass through the feeding port, the pneumatic gate valve 61, the feeding port of the feeder 2, the discharge port, the inlet 311 of the sealing mechanism 3, the feed port 312, the feed pipeline 51, and the feed port and enter the biomass gasification furnace 200 for combustion, so as to carry out the feeding of the biomass gasification feeding system 100.

[0127] During the biomass gasification feeding system 100's feeding process, a temperature detector detects the temperature signal within the feeding pipeline 51, a pressure detector detects the pressure signal within the feeding pipeline 51, and a gas detector 60 detects the combustible gas concentration signal within the storage bin 1. When the temperature signal received by the controller exceeds a preset temperature value and / or the pressure signal exceeds a preset pressure value, the controller controls the pneumatic gate valve 61, control valve 62, feeder 2, sealing mechanism 3, loosening mechanism 4, and air supply device 7 to close, preventing combustible gas from flowing back into the storage bin 1 and causing a fire or explosion. Simultaneously, the negative pressure suction device 8 and the gas treatment and dust removal device 9 remain operational to coordinate and centrally treat combustible gas that flows back into the feeder 2. When the temperature signal received by the controller is less than the preset temperature value and the pressure signal is less than the preset pressure value, the controller controls the pneumatic gate valve 61, control valve 62, feeder 2, sealing mechanism 3, loosening mechanism 4, and air supply device 7 to restart, allowing the biomass gasification feeding system 100 to continue feeding material to the biomass gasifier 200.

[0128] It can be seen from the above technical solution that the present invention has at least the following advantages and positive effects:

[0129] In the biomass gasification feeding system of the present application, a sealing mechanism is connected at the feed port of the feeder, and the feed port of the sealing mechanism is connected to the feed port of the biomass gasifier, so as to realize the forward conveyance of the material in the storage bin to the biomass gasifier, and to prevent the flammable and explosive gas in the biomass gasifier from reversely passing through the sealing mechanism and entering the feeder, or even entering the storage bin and causing a fire and explosion. In other words, the sealing mechanism can realize the one-way transportation of materials, that is, any material passing through the sealing mechanism can only be transported from the feed port to the feed port, but cannot enter the feed port from the feed port, so that the sealing mechanism has a certain sealing effect, and further, in the process of transporting materials through the sealing mechanism, the combustible gas in the biomass gasifier cannot enter the sealing mechanism. In this way, the sealing mechanism can serve as a measure for preventing the backflow of combustible gas in the biomass gasification feeding system, thereby improving the safety and reliability of the biomass gasification feeding system.

[0130] In addition, the sealing mechanism is coupled with a mechanical dynamic seal through an air seal, and a sealing gas inlet is provided on the sealing mechanism, and an external inert sealing gas source is connected through the sealing gas inlet to inject inert sealing gas into the interior of the sealing mechanism, so that the interior of the sealing mechanism can be pressurized and sealed, and a positive pressure is formed inside the sealing mechanism that is maintained higher than the preset numerical range of the operating pressure of the biomass gasifier. This can prevent the flammable and explosive gases in the biomass gasifier from flowing back into the feeder and the storage bin when the biomass gasifier is operating normally or pressure fluctuations occur, and can also overcome the pressure of the combustible gas in the biomass gasifier, so that the material can pass through the sealing mechanism smoothly, thereby improving the continuity and stability of material transportation.

[0131] While the present invention has been described with reference to several exemplary embodiments, it should be understood that the terms used are illustrative and exemplary rather than restrictive. Since the present invention can be embodied in a variety of forms without departing from the spirit or essence of the invention, it should be understood that the above-described embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope of the appended claims. Therefore, all changes and modifications that fall within the scope of the claims or their equivalents are intended to be covered by the appended claims.

Claims

1. A biomass gasification feeding system for conveying materials to a biomass gasifier, characterized in that: The biomass gasification feeding system comprises: A storage silo is used to store materials; the bottom of the storage silo is provided with a mechanical material collection mechanism and a material feeding port communicating with the interior thereof; A feeder having a feeding port and a discharging port, wherein the feeding port is connected to the feeding port of the storage bin through a discharging pipeline and a pneumatic gate valve, and the feeder is used to transport materials to the downstream biomass gasifier; A sealing mechanism having an inlet and a delivery port, wherein the inlet is directly connected to the discharge port of the feeder via a discharge pipeline, and the delivery port is connected to the feed port of the biomass gasifier, and the sealing mechanism is used to achieve continuous and positive conveying of the material in the feeder to the biomass gasifier; the sealing mechanism also includes a plurality of sealing air inlets distributed in an annular manner, and the sealing air inlets are used to connect to an external inert sealing air source; The sealing mechanism couples the mechanical dynamic seal through the air seal, and maintains a positive pressure in the sealing mechanism that is higher than the preset numerical range of the operating pressure of the biomass gasifier, thereby preventing the flammable and explosive gases in the biomass gasifier from flowing back to the feeder and the storage bin when the biomass gasifier is operating normally or pressure fluctuations occur.

2. The biomass gasification feeding system according to claim 1, characterized in that: The sealing mechanism is one-stage; or the sealing mechanism is two-stage or more, and the two-stage or more sealing mechanisms are connected in series or in parallel; The sealing mechanism includes a shell, a sealing material feeding member and a driving member. The sealing material feeding member is arranged inside the shell. The sealing material feeding member divides the interior of the shell into 4 to 20 mutually isolated accommodating chambers, and each of the accommodating chambers is used to communicate with the feed port, the feed port, and the sealing air inlet; the axial end of the sealing material feeding member is sealed with the end of the shell; the driving member is arranged outside the shell, and the driving member is connected to the sealing material feeding member for driving the sealing material feeding member to rotate.

3. The biomass gasification feeding system according to claim 2, characterized in that: The sealing air inlet includes an upper air inlet and a lower air inlet, and the upper air inlet and the lower air inlet are respectively arranged at opposite ends of the shell in the horizontal direction; the upper air inlet is located above the lower air inlet; The gasifier feeding system further includes a sealing gas supply device, which is in communication with both the upper air inlet and the lower air inlet and is used to deliver inert sealing gas into the accommodating chamber.

4. The biomass gasification feeding system according to claim 3, characterized in that: The sealed material conveying member includes a rotating shaft and an impeller, and the impeller is connected to an external driving member via the rotating shaft; A dynamic sealing redundancy is reserved between the radial outer periphery of the impeller and the inner peripheral wall of the housing.

5. The biomass gasification feeding system according to claim 1, characterized in that: The two ends of the feeder are respectively a first end and a second end, the feeding port is located at the first end, and the discharging port is located at the second end; The feeder is tilted upward from the first end to the second end, so that the discharge port is located above the feeding port and is connected to the feeding port through a cylindrical sealed cavity that can accommodate materials.

6. The biomass gasification feeding system according to claim 5, characterized in that: The horizontal inclination angle of the feeder is 0° to 45°; The vertical distance between the feeding port and the discharging port is greater than 50 cm.

7. The biomass gasification feeding system according to claim 1, 5 or 6, characterized in that: The feeder includes a housing, a screw conveying mechanism, and an external drive mechanism. The interior of the housing is hollow and forms a receiving cavity. The feeding port and the discharge port are both connected to the receiving cavity. The screw conveying mechanism extends along the axial direction of the housing. The screw conveying mechanism is disposed in the receiving cavity and is rotatably connected to a bearing on the housing. The screw conveying mechanism is connected to the end of the housing via a mechanical dynamic seal. The drive mechanism is connected to the screw conveying mechanism and is used to drive the screw conveying mechanism to operate. When there are multiple spiral conveying mechanisms, the multiple spiral conveying mechanisms are distributed in parallel in the accommodating cavity along the axial direction of the shell; among any two adjacent spiral conveying mechanisms, one of the spiral conveying mechanisms rotates in the clockwise direction, and the other spiral conveying mechanism rotates in the counterclockwise direction.

8. The biomass gasification feeding system according to claim 1, characterized in that: The biomass gasification feeding system includes a loosening mechanism, which is arranged on the storage bin and loosens the material in the storage bin by high-pressure gas pulses or medium- and high-frequency mechanical vibrations, and / or the loosening mechanism sprays inert loosening gas and fluidizing air into areas in the storage bin where material arching is likely to occur through an annular pipeline and multiple nozzles distributed circumferentially on the annular pipeline.

9. The biomass gasification feeding system according to claim 1, characterized in that: The material delivery port of the sealing mechanism is connected to one or more material delivery pipelines, and the material delivery pipelines are used to connect the material delivery port of the sealing mechanism with the feed port of the biomass gasifier; The feed pipeline includes a directly connected vertical pipe section and an inclined pipe section, the vertical pipe section extends vertically, and one end of the vertical pipe section away from the inclined pipe section is connected to the feed port of the sealing mechanism; the end of the inclined pipe section away from the vertical pipe section is connected to the feed port of the biomass gasifier; the inclined pipe section is inclined downward from the vertical pipe section to the biomass gasifier; The horizontal inclination angle of the inclined pipe section is greater than 60°.

10. The biomass gasification feeding system according to claim 9, characterized in that: The material conveying pipeline is provided with at least one air inlet communicating with the interior thereof; The gasifier feeding system further includes an air supply device, which is communicated with the air inlet and is used to supply loose air into the feeding pipeline.

11. The biomass gasification feeding system according to claim 9, characterized in that: The biomass gasification feeding system further includes a temperature sensor, which is provided on the feeding pipeline and is used to detect a temperature signal in the feeding pipeline; The biomass gasification feeding system further includes a pressure sensor, which is provided on the feeding pipeline and is used to detect the pressure signal in the feeding pipeline; The biomass gasification feeding system further includes a gas detector, which is disposed on the top of the storage bin and is used to detect a combustible gas concentration signal in the storage bin.

12. The biomass gasification feeding system according to claim 1, characterized in that: The biomass gasification feeding system also includes a negative pressure suction device arranged at the top, which is connected to the discharge port end of the feeder near the discharge port and is used to absorb a small amount of flammable and explosive gas flowing back into the feeder and the dust generated during the feeding process.

13. The biomass gasification feeding system according to claim 12, characterized in that: The biomass gasification feeding system further includes a gas processing and dust removal device, which is connected to the downstream of the negative pressure suction device and is used for burning and treating the flammable and explosive gas absorbed by the negative pressure suction device.

14. The biomass gasification feeding system according to claim 1, characterized in that: The pneumatic gate valve is used to control the opening and closing of the feeding port of the feeder and the feeding port of the storage bin; The biomass gasification feeding system further includes a control valve, which is used to control the connection and disconnection between the feeding port of the sealing mechanism and the feeding port of the biomass gasifier; The biomass gasification feeding system further includes a controller, which is electrically connected to the pneumatic gate valve, the control valve, the sealing mechanism, and the feeder.

Images