Gas pressure control device of biogas power generation system

Abstract

The utility model discloses an air pressure control device of a biogas power generation system, and belongs to the technical field of biogas power generation. The double-membrane gas holder comprises a double-membrane gas holder body, a gas inlet pipe, a drying box and an air blower. The air blower can send air into the drying box, the silica gel drying balls in the drying box can dehumidify the air, the dehumidified air can enter the pressure regulating chamber through the air inlet pipe, and therefore the service life of the outer film and the service life of the inner film are prolonged.

Description

Technical Field

[0001] This application relates to the technical field of biogas power generation, and particularly to a device for controlling the air pressure of a biogas power generation system. Background Art

[0002] Biogas is produced through the biogas fermentation process and contains a large amount of methane and some other gas components. In order to better utilize biogas for power generation, the generated biogas needs to be stored for supply as required. A double-membrane gas holder can be used as a container for storing biogas. It can bear a certain gas pressure and release it when needed to meet the requirements of the biogas power generation system. The double-membrane gas holder undertakes the function of regulating the biogas pressure. The process of biogas production is unstable and is affected by many factors, such as temperature, pressure, and the concentration of organic substances. In a biogas power generation system, a stable biogas supply is very important for ensuring power generation efficiency and the normal operation of equipment. The double-membrane gas holder can achieve a stable biogas supply by regulating the gas pressure in the system.

[0003] In the patent with the publication number CN203743815U, a double-membrane gas holder is disclosed. In this device, the air supply device can supplement air according to the magnitude of the pressure inside the outer membrane. However, sometimes the moisture content in the air is relatively high. Directly sending air into the outer membrane through a blower will affect the service life of the metal support structures of the outer membrane and the inner membrane. Utility Model Content

[0004] The purpose of this application is to propose a device for controlling the air pressure of a biogas power generation system for the above problems existing in the prior art.

[0005] This application can be realized through the following technical solutions: A device for controlling the air pressure of a biogas power generation system includes a double-membrane gas holder body, an intake pipe, a drying box, and a blower. The area between the inner membrane and the outer membrane of the double-membrane gas holder is a pressure regulating chamber; the intake pipe is connected to the outside of the double-membrane gas holder body and the pressure regulating chamber; the intake pipe is internally connected to the drying box, and several silica gel drying balls are placed in the drying box. The silica gel drying balls are used for drying air, and a filter screen one that can prevent the silica gel drying balls from leaving the drying box is installed on the drying box; the air outlet of the blower is connected to the inside of the drying box, and the blower can send air into the drying box. After the air is dried by the silica gel drying balls, it can enter the intake pipe.

[0006] In the above technical solution, the blower can send air into the drying box. The silica gel drying balls in the drying box can dehumidify the air. The dehumidified air can enter the pressure regulating chamber through the intake pipe, thereby extending the service life of the outer membrane and the inner membrane.

[0007] Furthermore, a material cylinder is provided above and below the drying oven. The material cylinder above the drying oven is used to place unused silica gel drying balls, and the material cylinder below the drying oven is used to place saturated drying balls. Both of the two material cylinders are connected to the inside of the drying oven through a pipeline, and a valve is provided on the pipeline.

[0008] In the above technical solution, after the silica gel drying balls are used for a period of time, they will reach the saturation point of their moisture absorption capacity. At this time, it is necessary to replace the silica gel drying balls. The valve below or above can be opened to enable the saturated silica gel drying balls in the drying oven to leave the drying oven or the unused silica gel drying balls in the material cylinder above the drying oven to enter the drying oven.

[0009] Furthermore, the cross-section of the drying oven is circular, and a concave surface is formed on the inner bottom surface of the drying oven. The pipeline located below the drying oven is at the lowest point of the concave surface.

[0010] In the above technical solution, the concave surface can enable the saturated silica gel drying balls to leave the drying oven more fully.

[0011] Furthermore, a humidity sensor is further included. The humidity sensor is used to detect the humidity of the air in the intake pipe. An alarm is installed on the outer wall of the intake pipe. The alarm is electrically connected to a controller, and the controller is electrically connected to the humidity sensor so that when the humidity value in the intake pipe reaches a preset value, the controller can control the alarm to give an alarm.

[0012] In the above technical solution, by setting the humidity sensor and the alarm, when the silica gel drying balls reach saturation, the humidity of the air in the intake pipe will increase, and the controller can control the alarm to give an alarm to remind the worker that the drying effect of the silica gel drying balls is poor at this time and remind the worker to replace the silica gel drying balls in time.

[0013] Furthermore, an observation window one is provided on the side wall of the drying oven.

[0014] In the above technical solution, the observation window one is convenient for the worker to control the number of silica gel drying balls in the drying oven so as to facilitate the worker to close the valve in time.

[0015] Furthermore, the air outlet of the blower is connected to the inside of the drying oven through a connecting pipe, and a filter screen two is provided in the connecting pipe. The filter screen two is used to filter solid impurity particles in the air.

[0016] In the above technical solution, a double-membrane gas holder usually has a pressure sensor to detect the air pressure in the outer membrane. Setting the filter screen two can reduce the possibility of solid impurity particles adhering to the sensitive element of the pressure sensor and ensure the accuracy of the pressure sensor test.

[0017] Further, a through hole communicating with the inside and outside is formed through the outer wall of the connecting pipe facing away from the ground. A clamping groove is formed on the inner wall of the connecting pipe for the second filter screen to be clamped into. The through hole is for the second filter screen to enter the pipeline so that the filter screen can be clamped with the clamping groove. There are two second filter screens in total.

[0018] In the above technical solution, the clamping groove and the through hole are provided to facilitate the worker to draw out and replace the second filter screen. There are two second filter screens. When the blower stops working, the worker can draw out one second filter screen and then place the other second filter screen in the clamping groove to prevent the cleaning of the second filter screen from affecting the cleanliness of the air entering the drying box.

[0019] Further, a handle is installed on the second filter screen and can be exposed outside the pipeline.

[0020] In the above technical solution, the handle facilitates the worker to take the second filter screen and draw it out from the through hole.

[0021] Further, holes for the silica gel drying balls to enter and exit are formed through the side walls of the two cylinders, and a door capable of plugging the holes is detachably installed on the cylinder.

[0022] In the above technical solution, the door is provided to facilitate taking out or placing the silica gel drying balls into the cylinder.

[0023] In summary, the present application has the following technical effects: The blower can send air into the drying box, the silica gel drying balls in the drying box can dehumidify the air, and the dehumidified air can enter the pressure regulating chamber through the air inlet pipe, thereby prolonging the service life of the outer film and the inner film. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is the overall structural schematic diagram of the present application;

[0025] Figure 2 is the position schematic diagram of the pressure regulating chamber in the present application;

[0026] Figure 3 is the position schematic diagram of the first filter screen in the present application;

[0027] Figure 4 is the position schematic diagram of the hole in the present application.

[0028] Figure 5 is the position schematic diagram of the through hole in the present application;

[0029] Figure 6 is Figure 1 the enlarged structural view of area A in

[0030] Description of the reference numerals:

[0031] 1. Double membrane gas cabinet body; 11. Inner membrane; 12. Outer membrane; 13. Pressure regulating chamber; 2. Inlet pipe; 3. Drying box; 31. Vent; 4. Filter one; 5. Blower; 6. Barrel; 7. Pipeline; 8. Valve; 9. Concave surface; 10. Humidity sensor; 14. Controller; 15. Alarm; 16. Observation window one; 17. Connecting pipe; 171. Through hole; 172. Slot; 18. Filter two; 19. Handle; 20. Hole; 21. Door; 22. Air pressure sensor; 23. Observation window two. DETAILED DESCRIPTION

[0032] Please refer to the attached drawings in the instruction manual. Figure 1 , Figure 2 and Figure 3 An embodiment of the present application provides an air pressure control device for a biogas power generation system, including a double-membrane gas cabinet body 1, the double-membrane gas cabinet body 1 includes an inner membrane 11 and an outer membrane 12, the area between the inner membrane 11 and the outer membrane 12 is a pressure regulating chamber 13, an air inlet pipe 2 is installed on the double-membrane gas cabinet body 1, the air inlet pipe 2 is connected to the pressure regulating chamber 13 and the outside of the double-membrane gas cabinet body 1, the end of the air inlet pipe 2 away from the length direction of the double-membrane gas cabinet body 1 is connected to the inside of a drying box 3, and a vent 31 is formed on both opposite side walls of the drying box 3, the end of the air inlet pipe 2 away from the double-membrane gas cabinet body 1 is installed at a vent 31, and the other end of the drying box 3 is connected to the inside of the drying box 3. A connecting pipe 17 is installed at the air vent 31, and a blower 5 is installed at one end of the connecting pipe 17 which is away from the drying box 3 in the length direction. A filter screen 4 is installed on the drying box 3 and located at the two air vents 31. The interior of the drying box 3 is used to place silica gel drying balls. The filter screen 4 can prevent the silica gel drying balls from leaving the drying box 3. The blower 5 can send air into the drying box 3 through the connecting pipe 17. The silica gel drying balls are used to dry the air. After being dried by the silica gel drying balls, the air can enter the pressure regulating chamber 13 through the air inlet pipe 2. By setting the drying box 3 to dry the air in the pressure regulating chamber 13, the service life of the metal parts in the outer membrane 12 is extended.

[0033] Please refer to the attached drawings in the instruction manual. Figure 1 and Figure 3, after being used for a period of time, the silica gel drying balls will reach the saturation point of their moisture absorption capacity. There is a cartridge 6 placed above and below the drying oven 3. The cartridge 6 above the drying oven 3 is used to place unused silica gel drying balls, and the cartridge 6 below the drying oven 3 is used to place the saturated drying balls. Both cartridges 6 are connected to the inside of the drying oven 3 through a pipeline 7, and a valve 8 is provided on the pipeline 7. The cross-section of the drying oven 3 is circular, and a concave surface 9 is formed on the inner bottom surface of the drying oven 3. One end in the length direction of the pipeline 7 located below the drying oven 3 is at the lowest point of the concave surface 9. This design facilitates the more complete departure of the saturated silica gel drying balls from the drying oven 3. A humidity sensor 10 is installed on the intake pipe 2. The humidity sensor 10 is used to detect the humidity of the air in the intake pipe 2. An alarm 15 is installed on the outer wall of the intake pipe 2. The alarm 15 is electrically connected to a controller 14, and the controller 14 is electrically connected to the humidity sensor 10. Workers can preset the humidity value so that when the humidity value in the intake pipe 2 reaches the preset value, the controller 14 can control the alarm 15 to sound an alarm. At this time, it means that the silica gel drying balls have reached the saturated state and the moisture absorption effect is poor. Workers can open the valve 8 below to make the saturated silica gel drying balls in the drying oven 3 fall into the lower cartridge 6, and then open the valve 8 above to make the unused silica gel drying balls fall into the drying oven 3. An observation window 16 is installed on the side wall of the drying oven 3. Through the observation window 16, the quantity of the silica gel drying balls in the drying oven 3 can be observed, so as to facilitate workers to control the quantity of the silica gel drying balls in the drying oven 3.

[0034] Please refer to the Figure 1 and Figure 4 of the specification drawings. On the side walls of both cartridges 6, an observation window 23 is installed, which is convenient for workers to observe the quantity of the silica gel drying balls in the cartridges 6. A hole 20 for the silica gel drying balls to enter and exit is formed through the side walls of both cartridges 6. Both cartridges 6 are detachably installed with a door 21 that can block the hole 20. The door 21 is installed on the outer wall of the cartridge 6 by screws. The hole 20 of the cartridge 6 above the drying oven 3 is at the end of the cartridge 6 away from the ground, and the hole 20 of the cartridge 6 below the drying oven 3 is at the end of the cartridge 6 close to the ground. This design facilitates people to put in or take out the silica gel drying balls in the cartridges 6.

[0035] Please refer to the Figure 1 、 Figure 5 and Figure 6, a filter screen two 18 capable of filtering solid impurity particles in the air is installed on the inner wall of the connecting pipe 17. A through hole 171 that can communicate with the inside and outside of the connecting pipe 17 is penetrated and opened on the outer wall of the connecting pipe 17 away from the ground. A clamping groove 172 for the filter screen two 18 to be clamped into is opened on the inner wall of the connecting pipe 17. The through hole 171 is located directly above the clamping groove 172, and the through hole 171 is used for the filter screen two 18 to enter the pipe 7 and be clamped into the clamping groove 172. By setting the filter screen two 18 to process the solid impurities in the air, the possibility of solid impurities entering the pressure regulating chamber 13 is reduced. The double-membrane gas holder body 1 is usually provided with a pressure sensor 22 to detect the air pressure in the outer membrane 12. Setting the filter screen two 18 can reduce the possibility of solid impurity particles adhering to the sensitive element of the pressure sensor 22, ensuring the accuracy of the pressure sensor test. By setting the through hole 171 and the chute, it is convenient for the installation and removal of the filter screen two 18. There are two filter screens two 18 in total. When one filter screen two 18 is blocked, the worker can pull out the filter screen two 18 from the through hole 171 and install the other filter screen two 18 into the through hole 171, which is convenient for the worker to take out the filter screen two 18 for cleaning. A handle 19 that can be exposed outside the pipe 7 is installed on the filter screen two 18, and the handle 19 is convenient for the worker to take out the filter screen. By setting two filter screens two 18, the possibility of affecting the cleanliness of the air entering the outer membrane 12 during the cleaning process of the filter screen two 18 is reduced.

[0036] The working principle of this embodiment: The blower 5 sends air into the connecting pipe 17, and the air contacts the silica gel drying balls in the drying box 3 through the connecting pipe 17. The silica gel drying balls can dry the air, and the dried air can enter the pressure regulating chamber 13 through the air inlet pipe 2.

[0037] The above are all the preferred embodiments of this application. The protection scope of this application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A gas pressure control device for a biogas power generation system, characterized in that Including: A double-membrane gas holder body (1), and the area between the inner membrane (11) and the outer membrane (12) of the double-membrane gas holder is a pressure regulating chamber (13); An intake pipe (2), which is connected to the outside of the double-membrane gas holder body (1) and the pressure regulating chamber (13); A drying box (3), the intake pipe (2) is connected to the inside of the drying box (3), several silica gel drying balls are placed in the drying box (3), the silica gel drying balls are used for drying air, and a first filter screen (4) that can prevent the silica gel drying balls from leaving the drying box (3) is installed on the drying box (3); A blower (5), the air outlet of the blower (5) is connected to the inside of the drying box (3), the blower (5) can send air into the drying box (3), and the air can enter the intake pipe (2) after being dried by the silica gel drying balls.

2. The air pressure control device of a biogas power generation system according to claim 1, characterized in that, A material cylinder (6) is provided above and below the drying box (3). The material cylinder (6) above the drying box (3) is used for placing unused silica gel drying balls, and the material cylinder (6) below the drying box (3) is used for placing saturated drying balls. The two material cylinders (6) are both connected to the inside of the drying box (3) through a pipeline (7), and a valve (8) is provided on the pipeline (7).

3. The air pressure control device of a biogas power generation system according to claim 2, characterized in that The cross-section of the drying box (3) is circular, and a concave surface (9) is formed on the inner bottom surface of the drying box (3). The pipeline (7) located below the drying box (3) is at the lowest point of the concave surface (9).

4. The air pressure control device of a biogas power generation system according to claim 2, characterized in that, It also includes a humidity sensor (10), which is used to detect the humidity of the air in the intake pipe (2). An alarm (15) is installed on the outer wall of the intake pipe (2). The alarm (15) is electrically connected to a controller (14), and the controller (14) is electrically connected to the humidity sensor (10) so that when the humidity value in the intake pipe (2) reaches a preset value, the controller (14) can control the alarm (15) to give an alarm.

5. The air pressure control device of a biogas power generation system according to claim 2, characterized in that, An observation window one (16) is provided on the side wall of the drying box (3).

6. The air pressure control device of a biogas power generation system according to claim 1, characterized in that, The air outlet of the blower (5) is connected to the inside of the drying box (3) through a connecting pipe (17). A second filter screen (18) is provided in the connecting pipe (17), and the second filter screen (18) is used to filter solid impurity particles in the air.

7. The air pressure control device of a biogas power generation system according to claim 6, characterized in that, A through hole (171) that can communicate with the inside and outside of itself is penetrated on the outer wall of the connecting pipe (17) facing away from the ground. A clamping groove (172) is provided on the inner wall of the connecting pipe (17), and the clamping groove (172) is used for the second filter screen (18) to be clamped in. The through hole (171) is used for the second filter screen (18) to enter the pipeline (7) so that the second filter screen (18) can be clamped with the clamping groove (172). There are two second filter screens (18) in total.

8. A pressure control device for a biogas power generation system according to claim 7, characterized in that, A handle (19) that can be exposed outside the pipeline (7) is installed on the second filter screen (18).

9. The air pressure control device of a biogas power generation system according to claim 1, characterized in that, A hole (20) for the silica gel drying balls to enter and exit is penetrated on the side walls of the two material cylinders (6), and a door (21) that can block the hole (20) is detachably installed on the material cylinder (6).

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