Biomass gasification feeding control system

Abstract

The utility model discloses a biomass gasification feeding control system, and belongs to the technical field of biomass gasification feeding. Comprising a gasification furnace, a stock bin is arranged on one side of the gasification furnace, a boiler is arranged on the other side of the gasification furnace, and the boiler is fixedly connected with the gasification furnace through an exhaust channel. The biomass gasification feeding device solves the problems that in the prior art, in the biomass gasification process, a feeding device does not crush massive fuel, so that the fuel is not fully combusted, the fuel is prone to being accumulated at the feeding end of a feeding system, and continuous feeding cannot be kept. The two smashing rollers move in the opposite directions so that biomass fuel can be smashed in advance, large fuel blocks can be smashed into small fuel blocks, combustion is more sufficient, the smashed fuel falls on a transverse plate, a pushing plate can be driven to move through telescopic movement of a pneumatic pushing rod, the fuel is pushed into a feeding opening of a spiral conveying mechanism, and continuous feeding is kept.

Description

Technical Field

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

[0002] Biomass is an important renewable energy source. It is widely distributed and in huge quantities. However, due to its low energy density and dispersion, it is difficult to process it in a large-scale centralized manner. This is precisely the reason why the utilization level of biomass is low in most developing countries. Biomass gasification is a process in which the polymers of biomass undergo pyrolysis, oxidation, reduction and reforming reactions under certain thermodynamic conditions with the help of air or oxygen and water vapor, and are finally converted into combustible gases such as carbon monoxide, hydrogen and low molecular hydrocarbons.

[0003] A Chinese patent with publication number CN206646079U discloses a biomass gasification system: the patent can accurately control the temperature, increase the gas generation rate, and reduce the tar content in the generated gas. The gas enters and exits the cracking zone and the reduction zone from the side, which is conducive to sufficient gas reduction and complete tar cracking, and improves the quality of the gas. The W-type loop design is adopted inside the loading box to effectively increase the contact rate between gas and material.

[0004] However, although the above technology solves the problem that the coke will cause subsequent pipelines to stick and clog, it still has the following defects:

[0005] In the existing biomass gasification process, the feeding device does not break up the large pieces of fuel, so that the fuel is not fully burned, and the fuel is easily accumulated at the feeding end of the feeding system, and continuous feeding cannot be maintained. Utility Model Content

[0006] The utility model aims to provide a biomass gasification feeding control system, which provides a crushing roller in the feeding trough of the silo. The two crushing rollers move toward each other to crush the biomass fuel in advance, so that large pieces of fuel are broken into small pieces, so that the combustion is more complete. The crushed fuel falls on the horizontal plate, and the telescopic movement of the pneumatic push rod can drive the push plate to move, pushing the fuel into the feeding port of the spiral conveying mechanism to maintain continuous feeding and avoid fuel accumulation, thereby solving the problems in the prior art.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a biomass gasification feeding control system, comprising a gasifier, a silo is provided on one side of the gasifier, a boiler is provided on the other side of the gasifier, the boiler and the gasifier are fixedly connected via an exhaust channel, a fan is provided in the exhaust channel, a feed trough is provided at the upper end of the silo, two crushing rollers moving towards each other are provided inside the feed trough, driving motors for driving the crushing rollers are respectively provided on both sides of the feed trough, a cross plate is fixedly provided in the silo, a push plate is provided on the upper end of the cross plate, and the push plate is fixedly connected to the silo via a pneumatic push rod.

[0008] Preferably, a hopper is provided at the upper end of the gasifier, an air inlet pipe is provided on one side of the gasifier, and a water vapor pipe is provided on the other side of the gasifier, and solenoid valves are provided inside the air inlet pipe and the water vapor pipe.

[0009] Preferably, a heating device is installed at the front end of the gasifier, a slag discharge pipe is provided at the bottom of the gasifier, and a sealing plug is provided inside the slag discharge pipe.

[0010] Preferably, a screw conveying mechanism is provided on one side of the silo, and the screw conveying mechanism includes a shell, a feed pipe, a mounting plate, a smoke inlet, a feed inlet, a servo motor and a screw conveying shaft, and one end of the shell extends to the interior of the silo.

[0011] Preferably, a feed pipe is provided below the other end of the shell, and the feed pipe corresponds to the hopper, and a screw conveying shaft is provided inside the shell, one end of the screw conveying shaft is connected to the shell through a bearing, and the other end of the screw conveying shaft is fixedly connected to the shell through a mounting plate.

[0012] Preferably, a servo motor for driving the screw conveying shaft is installed outside the mounting plate, and a support seat is fixedly provided on one side of the housing close to the servo motor.

[0013] Preferably, a material feed port is provided at the upper end of the shell, and a smoke inlet is provided at the lower end of the shell.

[0014] Preferably, an air outlet pipe is provided on a side of the boiler away from the gasifier, a temperature probe is provided on the air outlet pipe, the air outlet pipe is fixedly connected to the smoke inlet via a smoke return pipe, and a control valve is provided inside the smoke return pipe.

[0015] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0016] 1. The utility model is a biomass gasification feeding control system. By arranging crushing rollers in the feeding trough of the silo, the two crushing rollers move towards each other to crush the biomass fuel in advance, so that large pieces of fuel are broken into small pieces, so that the combustion is more complete. The crushed fuel falls on the horizontal plate, and the telescopic movement of the pneumatic push rod can drive the push plate to move, pushing the fuel into the feeding port of the spiral conveying mechanism to maintain continuous feeding and avoid fuel accumulation.

[0017] 2. The utility model provides a biomass gasification feeding control system, wherein the heating device is used to heat the biomass in the gasifier to gasification, the air inlet pipe and the water vapor pipe can transport external air and water vapor into the gasifier to improve the gasification effect, and by providing a smoke return pipe, the smoke return pipe can return part of the smoke to the smoke inlet of the spiral conveying mechanism, and the heat of the smoke is used to preheat the biomass fuel to ensure the dryness of the biomass fuel. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the gasifier of the utility model;

[0020] Figure 3 This is a schematic diagram of the top view of the feed chute of the utility model;

[0021] Figure 4 It is a schematic diagram of the internal structure of the silo and the spiral conveying mechanism of the utility model.

[0022] In the figure: 1, silo; 2, gasification furnace; 3, boiler; 4, screw conveying mechanism; 5, fan; 6, exhaust pipe; 7, smoke return pipe; 101, feed trough; 102, crushing roller; 103, drive motor; 104, cross plate; 105, pneumatic push rod; 106, push plate; 201, hopper; 202, air inlet pipe; 203, steam pipe; 204, solenoid valve; 205, heating device; 206, slag discharge pipe; 401, shell; 402, feed pipe; 403, mounting plate; 404, smoke inlet; 405, feed port; 406, servo motor; 407, screw conveying shaft; 408, support seat; 501, exhaust channel; 601, temperature probe; 701, control valve. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] In order to solve the technical problems in the prior art that the feeding device does not break up the large pieces of fuel during the biomass gasification process, resulting in insufficient combustion of the fuel, and the fuel is easily accumulated at the feeding end of the feeding system, making it impossible to maintain continuous feeding, please refer to Figure 1-4 , providing the following technical solutions:

[0025] In this embodiment, a biomass gasification feeding control system includes a gasifier 2, a silo 1 is provided on one side of the gasifier 2, a boiler 3 is provided on the other side of the gasifier 2, the boiler 3 and the gasifier 2 are fixedly connected through an exhaust channel 501, a fan 5 is provided in the exhaust channel 501, a feed trough 101 is provided at the upper end of the silo 1, two crushing rollers 102 moving toward each other are provided inside the feed trough 101, and driving motors 103 for driving the crushing rollers 102 are respectively provided on both sides of the feed trough 101, a cross plate 104 is fixedly provided in the silo 1, a push plate 106 is provided at the upper end of the cross plate 104, and the push plate 106 is fixedly connected to the silo 1 through a pneumatic push rod 105, and a feed port 405 is provided at the upper end of the shell 401. By starting The driving motor 103 drives the crushing rollers 102 to rotate respectively. The two crushing rollers 102 move toward each other to crush the biomass fuel in advance, so that large pieces of fuel are broken into small pieces to make the combustion more complete. The broken fuel falls on the horizontal plate 104. The telescopic movement of the pneumatic push rod 105 can drive the push plate 106 to move, and push the fuel to the feed port 405 of the spiral conveying mechanism 4 to maintain continuous feeding. The biomass gas generated after the fuel enters the gasification furnace 2 for pyrolysis enters the boiler 3 under the action of the fan 5 and the exhaust channel 501 to supply gas for combustion and heat the furnace body. The heat energy output by the boiler 3 can be discharged through the exhaust pipe 6 for reuse. The air is supplied by the fan 5, so that the furnace temperature and the air intake volume can be controlled, so that the fuel can be fully gasified and burned in the furnace.

[0026] In this embodiment, a hopper 201 is provided at the upper end of the gasifier 2, an air inlet pipe 202 is provided on one side of the gasifier 2, and a water vapor pipe 203 is provided on the other side of the gasifier 2. Solenoid valves 204 are provided inside the air inlet pipe 202 and the water vapor pipe 203. During the gasification process, the air inlet pipe 202 and the water vapor pipe 203 can transport external air and water vapor into the gasifier 2 to improve the gasification effect, and the solenoid valve 204 can control the transport amount.

[0027] A heating device 205 is installed at the front end of the gasifier 2, and a slag discharge pipe 206 is provided at the bottom of the gasifier 2. A sealing plug is provided inside the slag discharge pipe 206. The heating device 205 is used to heat the biomass in the gasifier 2 to gasify it, and the biomass residue after gasification is completed is discharged through the slag discharge pipe 206.

[0028] In this embodiment, a screw conveying mechanism 4 is provided on one side of the silo 1, and the screw conveying mechanism 4 includes a shell 401, a feed pipe 402, a mounting plate 403, a smoke inlet 404, a feed port 405, a servo motor 406 and a screw conveying shaft 407. One end of the shell 401 extends to the interior of the silo 1, and a feed pipe 402 is provided below the other end of the shell 401, and the feed pipe 402 corresponds to the hopper 201. A screw conveying shaft 407 is provided inside the shell 401, and one end of the screw conveying shaft 407 is connected to the shell 401 through a bearing, and the other end of the screw conveying shaft 407 is fixedly connected to the shell 401 through the mounting plate 403.

[0029] A servo motor 406 for driving a screw conveying shaft 407 is installed on the outside of the mounting plate 403. A support seat 408 is fixedly provided on one side of the shell 401 close to the servo motor 406. By starting the servo motor 406, the screw conveying shaft 407 can be driven to achieve stable loading. The fuel falls into the hopper 201 through the discharge pipe 402, and the support seat 408 supports the screw conveying mechanism 4.

[0030] In this embodiment, a smoke inlet 404 is provided at the lower end of the shell 401, and an exhaust pipe 6 is provided on the side of the boiler 3 away from the gasifier 2. A temperature probe 601 is provided on the exhaust pipe 6. The exhaust pipe 6 is fixedly connected to the smoke inlet 404 through a smoke return pipe 7. A control valve 701 is provided inside the smoke return pipe 7. The temperature probe 601 is a prior art and is used to monitor the smoke temperature. The smoke return pipe 7 can return a part of the smoke to the smoke inlet 404 of the spiral conveying mechanism 4, and use the heat of the smoke to preheat the biomass fuel to ensure the dryness of the biomass fuel. The control valve 701 is used to control the flow and stillness of the gas.

[0031] Working principle: When in use, the biomass fuel is firstly passed through the feed trough 101 into the silo 1, and the driving motor 103 is started to drive the crushing rollers 102 to rotate respectively. The two crushing rollers 102 move towards each other to crush the biomass fuel in advance, so that large pieces of fuel are broken into small pieces, so that the combustion is more complete. The broken fuel falls on the cross plate 104, and the telescopic movement of the pneumatic push rod 105 can drive the push plate 106 to move, and push the fuel into the feed port 405 of the screw conveying mechanism 4. By starting the servo motor 406, the screw conveying shaft 407 can be driven to realize stable feeding. The fuel falls into the hopper 201 through the discharge pipe 402, and the heating device 205 is used to The biomass in the gasifier 2 is heated to gasification. During the gasification process, the air inlet pipe 202 and the steam pipe 203 can transport external air and steam into the gasifier 2 to improve the gasification effect. The biomass residue after gasification is completed is discharged through the slag discharge pipe 206. The biomass gas generated after the fuel enters the gasifier 2 and is pyrolyzed enters the boiler 3 under the action of the fan 5 and the exhaust channel 501 to supply gas for combustion and heat the furnace body. The heat energy output by the boiler 3 can be discharged through the outlet pipe 6 for reuse. The control valve 701 is opened, and the smoke return pipe 7 can return a part of the smoke to the smoke inlet 404 of the spiral conveying mechanism 4. The heat of the smoke is used to preheat the biomass fuel to ensure the dryness of the biomass fuel.

[0032] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A biomass gasification feed control system, comprising a gasifier (2), characterized in that: A silo (1) is provided on one side of the gasifier (2), and a boiler (3) is provided on the other side of the gasifier (2). The boiler (3) and the gasifier (2) are fixedly connected via an exhaust passage (501), and a fan (5) is provided in the exhaust passage (501). A feed trough (101) is provided at the upper end of the silo (1), and two crushing rollers (102) moving towards each other are provided inside the feed trough (101). Drive motors (103) for driving the crushing rollers (102) are provided on both sides of the feed trough (101). A transverse plate (104) is fixedly provided in the silo (1), and a push plate (106) is provided at the upper end of the transverse plate (104). The push plate (106) is fixedly connected to the silo (1) via a pneumatic push rod (105).

2. A biomass gasification feed control system according to claim 1, characterized in that: A hopper (201) is provided at the upper end of the gasifier (2), an air inlet pipe (202) is provided on one side of the gasifier (2), and a water vapor pipe (203) is provided on the other side of the gasifier (2), and electromagnetic valves (204) are provided inside the air inlet pipe (202) and the water vapor pipe (203).

3. A biomass gasification feed control system according to claim 1, characterized in that: A heating device (205) is installed at the front end of the gasification furnace (2), a slag discharge pipe (206) is provided at the bottom of the gasification furnace (2), and a sealing plug is provided inside the slag discharge pipe (206).

4. A biomass gasification feed control system according to claim 1, characterized in that: A screw conveying mechanism (4) is provided on one side of the silo (1), and the screw conveying mechanism (4) comprises a shell (401), a feed pipe (402), a mounting plate (403), a smoke inlet (404), a feed inlet (405), a servo motor (406) and a screw conveying shaft (407), and one end of the shell (401) extends to the interior of the silo (1).

5. A biomass gasification feed control system according to claim 4, characterized in that: A feed pipe (402) is provided below the other end of the shell (401), and the feed pipe (402) corresponds to the hopper (201). A screw conveying shaft (407) is provided inside the shell (401), one end of the screw conveying shaft (407) is connected to the shell (401) via a bearing, and the other end of the screw conveying shaft (407) is fixedly connected to the shell (401) via a mounting plate (403).

6. A biomass gasification feed control system according to claim 4, characterized in that: A servo motor (406) for driving a screw conveying shaft (407) is installed outside the mounting plate (403), and a support seat (408) is fixedly provided on one side of the housing (401) close to the servo motor (406).

7. A biomass gasification feed control system according to claim 4, characterized in that: The upper end of the shell (401) is provided with a material feed port (405), and the lower end of the shell (401) is provided with a smoke inlet (404).

8. The biomass gasification feed control system according to claim 1, characterized in that: An air outlet pipe (6) is provided on a side of the boiler (3) away from the gasifier (2); a temperature probe (601) is provided on the air outlet pipe (6); the air outlet pipe (6) is fixedly connected to a smoke inlet (404) via a smoke return pipe (7); a control valve (701) is provided inside the smoke return pipe (7).

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