Convective stirring equipment for fermented biogas slurry

Abstract

The utility model discloses a convection stirring device for fermented biogas slurry, which comprises a fermentation tank, the upper end of the fermentation tank is in threaded connection with an upper cover, the inner wall of the upper cover is fixedly connected with a gas collecting pipe, the gas collecting pipe is provided with a filter screen, the upper end of the upper cover is fixedly connected with a gas pump, and the gas pump is provided with a gas outlet. One end of the air pump is fixedly connected with a third circulating pipe, the lower end of the third circulating pipe is fixedly connected with a diverter valve, and the diverter valve is fixedly connected with the outer wall of the fermentation tank. According to the biogas fermentation device, the gas pump can pump biogas generated by fermentation through the gas collecting pipe when being started, so that the biogas is sprayed out of bubbles from the spray head through the third circulating pipe, the diverter valve, the second circulating pipe and the fermentation tank, the stirring efficiency is improved by matching with the second stirring blade and the third circulating pipe, and the biogas in the second circulating pipe is more and more along with the fermentation process; and when the air pressure is enough, the methane in the main pipeline pushes the rubber plug to move upwards to compress the spring.

Description

Technical Field

[0001] The utility model relates to the field of fermentation tanks, in particular to a convection stirring device for fermenting biogas slurry. Background Art

[0002] The existing convective stirring equipment for fermenting biogas slurry has certain disadvantages when in use. First, the stirring efficiency of the existing convective stirring equipment for fermenting biogas slurry is not enough, and the fermentation efficiency of the fermentation tank cannot be fully exerted. At the same time, the existing convective stirring equipment for fermenting biogas slurry does not have a heat dissipation device for the fermentation tank, and the temperature inside the fermentation tank cannot be adjusted. Utility Model Content

[0003] The utility model aims to solve the shortcomings in the prior art and proposes a convection stirring device for fermented biogas slurry.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a convection stirring device for fermented biogas slurry, comprising a fermentation tank, the upper end of the fermentation tank is threadedly connected with an upper cover, the inner wall of the upper cover is fixedly connected with a gas collecting pipe, a filter screen is arranged on the gas collecting pipe, the upper end of the upper cover is fixedly connected with an air pump, one end of the air pump is fixedly connected with a third circulation pipe, the lower end of the third circulation pipe is fixedly connected with a diverter valve, and the diverter valve is fixedly connected to the outer wall of the fermentation tank, and the lower end of the diverter valve is fixedly connected with a second A circulation pipe, one end of the second circulation pipe is rotatably connected with a nozzle, and the nozzle is located at the bottom end of the inner wall of the fermentation tank, a main pipeline is arranged inside the diverter valve, a sliding groove is arranged on one side of the main pipeline, a rubber plug is slidably connected in the sliding groove, a spring is fixedly connected to the upper end of the rubber plug, a movable plate is fixedly connected to the upper end of the spring, a threaded rod is rotatably connected to the upper end of the movable plate, and the threaded rod is threadedly connected to the diverter valve, a biogas pipe is arranged on one side of the sliding groove, and four groups of supporting legs are fixedly connected to the lower end of the fermentation tank.

[0005] As a further description of the above technical solution:

[0006] The upper end of the upper cover is fixedly connected to a motor, the lower end of the motor is extended with a first rotating shaft, the first rotating shaft is fixedly connected to a second stirring blade, the lower end of the first rotating shaft is clamped with a first gear, the inner wall of the fermentation tank is fixedly connected to a fixing rod, one end of the fixing rod is fixedly connected to a gear box, and the first gear is rotatably connected to the gear box.

[0007] As a further description of the above technical solution:

[0008] The inner wall of the gear box is rotatably connected to a third gear, and the first gear is meshed with the third gear. A second gear is meshed on one side of the third gear. A second rotating shaft is fixedly connected to the lower end of the second gear, and the second rotating shaft is fixedly connected to the nozzle. A first stirring blade is fixedly connected to the second rotating shaft.

[0009] As a further description of the above technical solution:

[0010] A cooling layer is fixedly connected to the inner wall of the fermentation tank, first circulation pipes are fixedly connected to both sides of the cooling layer, hollow heat sinks are fixedly connected between two groups of the first circulation pipes, and the hollow heat sinks are fixedly connected to four groups of supporting legs, and a circulation pump is arranged on one group of the first circulation pipes.

[0011] As a further description of the above technical solution:

[0012] A temperature sensor is fixedly connected to the inner wall of the second circulation pipe, a pressure sensor is fixedly connected to the inner wall of the temperature sensor, a control panel is fixedly connected to the outer wall of the second circulation pipe, a feeding pipe is fixedly connected to one side of the second circulation pipe, a first solenoid valve is arranged on the feeding pipe, a slag discharge pipe is arranged on one side of the fermentation tank, and a second solenoid valve is arranged on the slag discharge pipe.

[0013] The utility model has the following beneficial effects:

[0014] 1. The utility model provides an air pump that can pump the biogas produced by fermentation through the gas collecting pipe when starting, so that the biogas passes through the third circulation pipe, the diverter valve, the second circulation pipe, and the fermentation tank and sprays bubbles from the nozzle, which has a turning effect on the biogas liquid in the fermentation tank, and cooperates with the second stirring blade and the third circulation pipe to improve the stirring efficiency. The biogas in the second circulation pipe will increase with the fermentation process, and the air pressure will also increase accordingly. When the air pressure is sufficient, the biogas in the main pipeline will push the rubber plug to move up the compression spring, so that the biogas pipe is connected to the sliding groove, and the biogas is released from the biogas pipe, so that the air pressure in the second circulation pipe is maintained within a certain range. The position of the movable plate in the sliding groove can be adjusted by rotating the threaded rod, so as to adjust the air pressure threshold for lifting the rubber plug to connect the biogas pipe with the gear box. When the threaded rod is rotated to the uppermost end, the biogas pipe is directly connected to the sliding groove, which is convenient for releasing biogas, and can effectively control the pressure in the second circulation pipe within a pressure range suitable for fermentation.

[0015] 2. The utility model is provided with a circulation pump, which can drive the third gear, the first circulation pipe, and the coolant in the hollow heat sink to circulate when started, absorb the excess heat generated by the fermentation at the cooling layer, and dissipate the heat at the hollow heat sink, so that the fermentation can be carried out within a suitable temperature range, thereby improving the fermentation efficiency and avoiding the danger of heat collection to the fermentation tank.

[0016] 3. The utility model can make the first rotating shaft and the second rotating shaft rotate in opposite directions by setting the first gear, the second gear and the third gear, so that convection is formed between the second stirring blade and the first stirring blade, thereby improving the stirring efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a cross-sectional view of a convection stirring device for fermented biogas slurry proposed by the utility model;

[0018] Figure 2 for Figure 1 A magnified view of middle;

[0019] Figure 3 for Figure 1 Enlarged view of middle B;

[0020] Figure 4 for Figure 1 Enlarged view of middle C;

[0021] Figure 5 This is a stereoscopic diagram of a convection stirring device for fermenting biogas slurry proposed by the utility model.

[0022] Legend:

[0023] 1. Air pump; 2. Motor; 3. Filter; 4. Gas collecting pipe; 5. First solenoid valve; 6. Feeding pipe; 7. First rotating shaft; 8. Control panel; 9. Circulation pump; 10. First circulation pipe; 11. Fermentation tank; 12. Support leg; 13. Second rotating shaft; 14. Second circulation pipe; 15. First stirring blade; 16. Second stirring blade; 17. Third circulation pipe; 18. Upper cover; 19. Diverter valve; 20. Cooling layer; 21. Fixed rod; 22. Main pipeline; 23. Rubber plug; 24. Biogas pipe; 25. Spring; 26. Movable plate; 27. Threaded rod; 28. First gear; 29. ​​Second gear; 30. Third gear; 31. Gear box; 32. Nozzle; 33. Second solenoid valve; 34. Slag discharge pipe; 35. Hollow heat sink; 36. Sliding groove; 37. Temperature sensor; 38. Pressure sensor. DETAILED DESCRIPTION

[0024] Reference Figure 1-5The utility model provides an embodiment: a convection stirring device for fermenting biogas slurry, comprising a fermentation tank 11, an upper cover 18 is threadedly connected to the upper end of the fermentation tank 11, a gas collecting pipe 4 is fixedly connected to the inner wall of the upper cover 18, a filter screen 3 is arranged on the gas collecting pipe 4, an air pump 1 is fixedly connected to the upper end of the upper cover 18, a third circulation pipe 17 is fixedly connected to one end of the air pump 1, a diverter valve 19 is fixedly connected to the lower end of the third circulation pipe 17, and the diverter valve 19 is fixedly connected to the outer wall of the fermentation tank 11, and the lower end of the diverter valve 19 is fixedly connected to the outer wall of the fermentation tank 11. The second circulation pipe 14 is connected, and one end of the second circulation pipe 14 is rotatably connected to the nozzle 32, and the nozzle 32 is located at the bottom of the inner wall of the fermentation tank 11. When the air pump 1 is started, the biogas produced by fermentation can be pumped through the gas collection pipe 4, so that the biogas passes through the third circulation pipe 17, the diverter valve 19, the second circulation pipe 14, and the fermentation tank 11. Bubbles are ejected from the nozzle 32 to turn over the biogas in the fermentation tank 11. The main pipeline 22 is arranged inside the diverter valve 19, and a sliding groove 36 is arranged on one side of the main pipeline 22. The sliding groove 36 is slidably connected to the biogas generated by fermentation through the gas collection pipe 4. There is a rubber plug 23, the upper end of the rubber plug 23 is fixedly connected to a spring 25, the upper end of the spring 25 is fixedly connected to a movable plate 26, the upper end of the movable plate 26 is rotatably connected to a threaded rod 27, and the threaded rod 27 is threadedly connected to the diverter valve 19, and a biogas pipe 24 is arranged on one side of the sliding groove 36. The biogas in the second circulation pipe 14 will increase with the fermentation process, and the air pressure will also increase accordingly. When the air pressure is sufficient, the biogas in the main pipeline 22 will push the rubber plug 23 to move up and compress the spring 25, so that the biogas pipe 24 and the sliding groove 36 are connected. The biogas is released from the biogas pipe 24, so that the air pressure in the second circulation pipe 14 is maintained within a certain range. The position of the movable plate 26 in the sliding groove 36 can be adjusted by rotating the threaded rod 27, thereby adjusting the air pressure threshold for lifting the rubber plug 23 to make the biogas pipe 24 communicate with the gear box 31. When the threaded rod 27 is rotated to the uppermost end, the biogas pipe 24 is directly connected to the sliding groove 36, which is convenient for releasing biogas and can effectively control the pressure in the second circulation pipe 14 within a pressure range suitable for fermentation. Four sets of supporting legs 12 are fixedly connected to the lower end of the fermentation tank 11.

[0025] The upper end of the upper cover 18 is fixedly connected to the motor 2, the lower end of the motor 2 is extended to be provided with a first rotating shaft 7, the first rotating shaft 7 is fixedly connected to the second stirring blade 16, the lower end of the first rotating shaft 7 is clamped with a first gear 28, the inner wall of the fermentation tank 11 is fixedly connected to a fixing rod 21, one end of the fixing rod 21 is fixedly connected to a gear box 31, and the first gear 28 is rotatably connected to the gear box 31, the inner wall of the gear box 31 is rotatably connected to the third gear 30, and the first gear 28 is meshed with the third gear 30, and the third gear A second gear 29 is meshed on one side of 30, and a second rotating shaft 13 is fixedly connected to the lower end of the second gear 29, and the second rotating shaft 13 is fixedly connected to the nozzle 32, and a first stirring blade 15 is fixedly connected to the second rotating shaft 13. The motor 2 can drive the second stirring blade 16 to rotate through the first rotating shaft 7, and at the same time drive the second rotating shaft 13 to rotate through the first gear 28, the third gear 30, and the second gear 29, so that the first stirring blade 15 and the second stirring blade 16 rotate in opposite directions, forming convection to improve the stirring efficiency.

[0026] A cooling layer 20 is fixedly connected to the inner wall of the fermentation tank 11, and first circulation pipes 10 are fixedly connected to both sides of the cooling layer 20. A hollow heat sink 35 is fixedly connected between the two groups of first circulation pipes 10, and the hollow heat sink 35 is fixedly connected to the four groups of supporting legs 12. A circulation pump 9 is provided on one group of first circulation pipes 10. The circulation pump 9 can drive the coolant in the third gear 30, the first circulation pipe 10, and the hollow heat sink 35 to circulate when started, absorb excess heat generated by fermentation at the cooling layer 20, and dissipate heat at the hollow heat sink 35, so that fermentation can be carried out within a suitable temperature range, thereby improving the fermentation efficiency and avoiding danger to the fermentation tank 11 caused by heat collection.

[0027] A temperature sensor 37 is fixedly connected to the inner wall of the second circulation pipe 14, a pressure sensor 38 is fixedly connected to the inner wall of the temperature sensor 37, a control panel 8 is fixedly connected to the outer wall of the second circulation pipe 14, the temperature sensor 37 and the pressure sensor 38 detect the temperature and pressure in the fermentation tank 11, and transmit them to the control panel 8, the control panel 8 controls the power limit temperature of the circulation pump 9, and rotates the threaded rod 27 to adjust the pressure, a feeding pipe 6 is fixedly connected to one side of the second circulation pipe 14, a first solenoid valve 5 is arranged on the feeding pipe 6, a slag discharge pipe 34 is arranged on one side of the fermentation tank 11, a second solenoid valve 33 is arranged on the slag discharge pipe 34, the feeding pipe 6 is used for feeding, and the slag discharge pipe 34 is used for discharging.

[0028] Working principle: When the device is used, the control panel 8 is used to control the first solenoid valve 5 to open for a period of time, and biogas is added to the second circulation pipe 14. The air pump 1 is started synchronously, and the biogas produced by fermentation is pumped through the gas collection pipe 4, so that the biogas passes through the third circulation pipe 17, the diverter valve 19, the second circulation pipe 14, and the fermentation tank 11, and bubbles are sprayed from the nozzle 32, which has a flipping effect on the biogas in the fermentation tank 11. The motor 2 is started, and the motor 2 can drive the second stirring blade 16 to rotate through the first rotating shaft 7, and at the same time drive the second rotating shaft 13 to rotate through the first gear 28, the third gear 30, and the second gear 29, so that the first stirring blade 15 and the second stirring blade 16 rotate. The rotation direction is opposite, forming convection to improve the stirring efficiency. As the fermentation process becomes more and more, the air pressure will also increase accordingly. When the air pressure is sufficient, the biogas in the main pipe 22 will push the rubber stopper 23 to move up the compression spring 25, so that the biogas pipe 24 is connected to the sliding groove 36, and the biogas is released from the biogas pipe 24 to maintain the air pressure in the main pipe 22 within a certain range. The control panel 8 adjusts the power of the circulation pump 9 through the temperature detected by the temperature sensor 37 to keep the temperature in the second circulation pipe 14 within a certain range. After the fermentation is completed, first rotate the threaded rod 27 to above the mouth to release the biogas in the second circulation pipe 14, and open the second solenoid valve 33 to release the residue from the slag discharge pipe 34.

Claims

1. A convection stirring device for fermenting biogas slurry, comprising a fermentation tank (11), characterized in that: The upper end of the fermentation tank (11) is threadedly connected to an upper cover (18), the inner wall of the upper cover (18) is fixedly connected to a gas collection pipe (4), a filter screen (3) is provided on the gas collection pipe (4), the upper end of the upper cover (18) is fixedly connected to an air pump (1), one end of the air pump (1) is fixedly connected to a third circulation pipe (17), the lower end of the third circulation pipe (17) is fixedly connected to a diverter valve (19), and the diverter valve (19) is fixedly connected to the outer wall of the fermentation tank (11), the lower end of the diverter valve (19) is fixedly connected to a second circulation pipe (14), one end of the second circulation pipe (14) is rotatably connected to a nozzle (32), and the nozzle (32) Located at the bottom end of the inner wall of the fermentation tank (11), the diverter valve (19) is provided with a main pipeline (22) inside, a sliding groove (36) is provided on one side of the main pipeline (22), a rubber plug (23) is slidably connected in the sliding groove (36), a spring (25) is fixedly connected to the upper end of the rubber plug (23), a movable plate (26) is fixedly connected to the upper end of the spring (25), a threaded rod (27) is rotatably connected to the upper end of the movable plate (26), and the threaded rod (27) is threadedly connected to the diverter valve (19), a biogas pipe (24) is provided on one side of the sliding groove (36), and four groups of supporting legs (12) are fixedly connected to the lower end of the fermentation tank (11).

2. The convection stirring device for fermenting biogas slurry according to claim 1, characterized in that: The upper end of the upper cover (18) is fixedly connected to a motor (2), the lower end of the motor (2) is extended with a first rotating shaft (7), the first rotating shaft (7) is fixedly connected to a second stirring blade (16), the lower end of the first rotating shaft (7) is clamped with a first gear (28), the inner wall of the fermentation tank (11) is fixedly connected to a fixing rod (21), one end of the fixing rod (21) is fixedly connected to a gear box (31), and the first gear (28) is rotatably connected to the gear box (31).

3. The convection stirring device for fermenting biogas slurry according to claim 2, characterized in that: The inner wall of the gear box (31) is rotatably connected to a third gear (30), and the first gear (28) is meshed with the third gear (30). A second gear (29) is meshed on one side of the third gear (30). The lower end of the second gear (29) is fixedly connected to a second rotating shaft (13), and the second rotating shaft (13) is fixedly connected to the spray head (32). The second rotating shaft (13) is fixedly connected to a first stirring blade (15).

4. The convection stirring device for fermenting biogas slurry according to claim 1, characterized in that: The inner wall of the fermentation tank (11) is fixedly connected to a cooling layer (20), both sides of the cooling layer (20) are fixedly connected to first circulation pipes (10), a hollow heat sink (35) is fixedly connected between two groups of the first circulation pipes (10), and the hollow heat sink (35) is fixedly connected to four groups of supporting legs (12), and a circulation pump (9) is arranged on one group of the first circulation pipes (10).

5. The convection stirring device for fermenting biogas slurry according to claim 1, characterized in that: The inner wall of the second circulation pipe (14) is fixedly connected to a temperature sensor (37), the inner wall of the temperature sensor (37) is fixedly connected to a pressure sensor (38), the outer wall of the second circulation pipe (14) is fixedly connected to a control panel (8), one side of the second circulation pipe (14) is fixedly connected to a feeding pipe (6), the feeding pipe (6) is provided with a first solenoid valve (5), and one side of the fermentation tank (11) is provided with a slag discharge pipe (34), the slag discharge pipe (34) is provided with a second solenoid valve (33).

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