An internal and external double-loop extrusion degassing fully mixed anaerobic reactor

Abstract

An internal and external double-cycle extrusion degassing fully mixed anaerobic reactor relates to a reactor that can achieve elastic filler extrusion degassing in a fully mixed anaerobic reaction. The present invention aims to solve the technical problems of poor mass transfer effect and low sewage treatment efficiency caused by the fact that in a fully mixed anaerobic bioreactor, bubbles adhere to the inside of the filler and cannot be removed in time, resulting in a decrease in the density of the filler, floating on the liquid surface of the reactor and forming a pile. In the present invention, biogas is introduced into the extrusion degassing pipe through a biogas pump, and the airflow drives the water flow to bring the filler into the extrusion degassing pipe. The filler rises to the extrusion zone and undergoes extrusion to complete degassing. The degassed filler returns to the reaction zone and forms an external cycle under the action of the stirring device; the elastic filler at the bottom of the reactor enters the extrusion zone for degassing under the action of biogas lifting and then returns to the reaction zone to form an internal cycle, effectively strengthening the mixing and mass transfer effect between the filler and the pollutants in the sewage, and avoiding the problem of the filler floating on the liquid surface of the reactor and forming a pile.

Description

Technical Field

[0001] The present invention relates to a reactor capable of realizing extrusion degassing of elastic packing in a completely mixed anaerobic reaction. Background Art

[0002] At present, China's industrial development is rapid, and the problems of water resource shortage and water environment deterioration also need to be solved urgently. It is particularly important to study how to efficiently treat wastewater with as little energy consumption as possible under the current requirements of "dual carbon". Anaerobic biological treatment is a commonly used method in sewage treatment. Compared with aerobic methods, anaerobic biological treatment methods have the characteristics of low energy consumption, strong adaptability, low sludge production, and can generate energy. At present, the widely used anaerobic biofilm reactors at home and abroad mainly include fixed-bed, fluidized-bed, and composite biofilm reactors, etc. The completely mixed anaerobic bioreactor is a commonly used reactor, which can resist high shock loads and has good treatment effects at the same time. However, in the completely mixed anaerobic bioreactor, due to the bubbles generated by the anaerobic reaction adhering to the inside of the elastic packing and unable to be removed in time, the density of the elastic packing becomes smaller, floating on the upper liquid surface of the reactor to form a pile, resulting in poor mass transfer effect and low sewage treatment efficiency. Summary of the Invention

[0003] The present invention aims to solve the technical problems that in the existing completely mixed anaerobic bioreactor, the bubbles generated by the anaerobic reaction adhere to the inside of the elastic packing and cannot be removed in time, resulting in a decrease in the density of the elastic packing, floating on the upper liquid surface of the reactor to form a pile, and thus poor mass transfer effect and low sewage treatment efficiency, and provides an internal and external double-cycle extrusion degassing completely mixed anaerobic reactor.

[0004] The internal and external double-cycle extrusion degassing completely mixed anaerobic reactor of the present invention is composed of a reactor body 1, a stirring paddle 2, a stirring rod 3, a motor 4, an inlet pipe 5, a pressure gas tank 6, a pressure gas valve 7, a biogas pipe 8, a biogas pump 9, a nozzle 10, a hyperbolic extrusion degassing pipe 11, an elastic packing 12, an inlet water pipe 13, an outlet water pipe 14, a connecting rod 15, and an outlet gas pipe 16;

[0005] The described water inlet pipe 13 is arranged at the bottom of the outer side wall of the reactor body 1, and the water outlet pipe 14 is arranged at the top of the outer side wall of the reactor body 1; the hyperbolic extrusion degassing pipe 11 is of a hollow structure, and from top to bottom, it is successively an outflow area 11-1, an extrusion area 11-3, and an inflow area 11-2. Both the outflow area 11-1 and the inflow area 11-2 are of a horn-shaped structure and both ends are of an open structure. The maximum diameter of the bottom of the hyperbolic extrusion degassing pipe 11 is smaller than the maximum diameter of the top of the hyperbolic extrusion degassing pipe 11; the extrusion area 11-3 is of a cylindrical structure, and a plurality of extrusion blocks 11-4 are uniformly arranged on the inner wall of the extrusion area 11-3. The extrusion blocks 11-4 are of a hemispherical structure; the hyperbolic extrusion degassing pipe 11 is arranged in the central area inside the reactor body 1, and the top end of the hyperbolic extrusion degassing pipe 11 is at the water outlet liquid level of the reactor body 1; the top of the hyperbolic extrusion degassing pipe 11 is fixed to the top of the inner cavity of the reactor body 1 through a plurality of connecting rods 15; a pressure gas tank 6 is fixed to the top of the reactor body 1, and the inner cavity of the reactor body 1 is communicated with the inner cavity of the pressure gas tank 6 through a plurality of air inlet pipes 5. The top of the pressure gas tank 6 is communicated with the air outlet pipe 16, and a pressure gas valve 7 is arranged on the air outlet pipe 16. The pressure gas tank 6 is communicated with the air inlet of the biogas pipe 8, a biogas pump 9 is arranged on the biogas pipe 8, and the air outlet of the biogas pipe 8 is communicated with the nozzle 10. The nozzle 10 is arranged inside the hyperbolic extrusion degassing pipe 11 and close to the bottom of the hyperbolic extrusion degassing pipe 11; a plurality of stirring rods 3 are uniformly arranged in the inner cavity of the reactor body 1 and around the hyperbolic extrusion degassing pipe 11. A stirring paddle 2 is arranged below the stirring rod 3, and the height of the stirring paddle 2 is between the water inlet pipe 13 and the bottom of the hyperbolic extrusion degassing pipe 11; the upper part of the stirring rod 3 is connected to the power output end of the motor 4, and the motor 4 is arranged on the top of the reactor body 1; the filler 12 loaded with organisms is located in the reactor body 1.

[0006] The using method of the internal and external double-cycle extrusion degassing completely mixed anaerobic reactor of the present invention is as follows:

[0007] The wastewater to be treated enters the reactor body 1 from the lower part through the water inlet pipe 13. Due to the agitation of the stirring paddle 2, the influent is fully mixed; the biogas generated by the anaerobic reaction of the wastewater to be treated with the sludge on the elastic filler 12 in the reaction zone (the upper part of the water inlet pipe 13) enters the pressure gas tank 6 through the air inlet pipe 5, and then enters the hyperbolic extrusion degassing pipe 11 through the biogas pipe 8 and the nozzle 10. A large amount of gas is ejected at the nozzle 10, driving the liquid to flow, forming as Figure 1In the circulating flow shown, the flow regime in the reactor body 1 is even closer to the completely mixed state. At the same time, due to the existence of the circulating flow, the elastic packing 12 continuously flows with the water. After entering the hyperbolic extrusion degassing pipe 11 from the bottom of the hyperbolic extrusion degassing pipe 11, due to the mutual extrusion of the elastic packings 12 and the extrusion of the extrusion block 11-4, the gas in the elastic packing 12 can be discharged, and it will not push and float at the liquid level of the reactor. Instead, it continuously flows with the circulating flow. Finally, the effluent flows out from the outlet pipe 14; the generated gas can be collected at the gas outlet pipe 16.

[0008] The bottom opening of the hyperbolic extrusion degassing pipe 11 is smaller than the top opening of the hyperbolic extrusion degassing pipe 11. The small bottom opening results in a fast flow rate, which is convenient for sucking the elastic packing 12 into the hyperbolic extrusion degassing pipe 11; the large top opening diffuses to the surroundings, avoiding the concentration of the elastic packing 12 at the top and discharging it to the surroundings.

[0009] The internal and external double-circulation extrusion degassing completely mixed anaerobic reactor of the present invention has a simple structure. Through the biogas pump 9 arranged outside, the elastic packing 12 can enter the hyperbolic extrusion degassing pipe 11 with the water and mutually extrude and exhaust gas in the middle extrusion area 11-3 of the hyperbolic extrusion degassing pipe 11. At the same time, the biogas pump 9 makes the elastic packing 12 flow out from the upper end of the hyperbolic extrusion degassing pipe 11, forming an internal circulation in the reactor body 1, making the elastic packing 12 continuously circulate without accumulation. Therefore, the generation of dead zones in the reactor can be avoided. Coupled with the stirring of the stirring paddle 2, the flow regime in the reactor is close to the completely mixed state.

[0010] In the present invention, part of the biogas generated by the anaerobic reaction in the reactor is collected. The gas is introduced into the hyperbolic extrusion degassing pipe 11 arranged in the center of the reactor through the biogas pump 9. The negative pressure suction effect generated by the rising air flow drives the water flow, and the elastic packing 12 near the lower edge of the hyperbolic extrusion degassing pipe 11 flows into the hyperbolic extrusion degassing pipe 11 with the water. The elastic packing 12 rises with the water flow to the extrusion area 11-3. Due to the limited space, the elastic packings 12 exert an extrusion effect on each other and collide with the extrusion block 11-4 arranged in the extrusion area 11-3, completing the extrusion and vibration degassing. After degassing, the elastic packing 12 returns to the reaction area between the inner wall of the anaerobic reactor and the outer wall of the hyperbolic extrusion degassing pipe 11 along the upper edge of the hyperbolic extrusion degassing pipe 11, forming an external circulation effect in the horizontal and vertical directions under the action of the stirring device arranged in the reaction area; the elastic packing 12 near the lower edge of the hyperbolic extrusion degassing pipe 11 at the bottom of the reactor enters the extrusion area 11-3 for degassing under the biogas lifting effect and then returns to the reaction area along the upper edge of the hyperbolic extrusion degassing pipe 11 to form an internal circulation effect, effectively strengthening the mixing and mass transfer effect between the packing and the pollutants in the sewage, and avoiding the problem of the packing floating on the upper liquid level of the reactor and forming a pile. Description of the Drawings

[0011] Figure 1Schematic diagram of the internal and external double-loop extrusion degassing fully mixed anaerobic reactor of Embodiment 1;

[0012] Figure 2 is Figure 1 A-A cross-sectional view of;

[0013] Figure 3 is Figure 1 Schematic diagram of the hyperbolic extrusion degassing pipe 11 in; Embodiment

[0014] Embodiment 1: This embodiment is an internal and external double-loop extrusion degassing fully mixed anaerobic reactor. As Figures 1 - 3 shown, it is specifically composed of a reactor body 1, a stirring paddle 2, a stirring rod 3, a motor 4, an air inlet pipe 5, a pressure gas tank 6, a pressure gas valve 7, a biogas pipe 8, a biogas pump 9, a nozzle 10, a hyperbolic extrusion degassing pipe 11, an elastic filler 12, a water inlet pipe 13, a water outlet pipe 14, a connecting rod 15, and an air outlet pipe 16;

[0015] The described water inlet pipe 13 is arranged at the bottom of the outer side wall of the reactor body 1, and the water outlet pipe 14 is arranged at the top of the outer side wall of the reactor body 1; the hyperbolic extrusion degassing pipe 11 is of a hollow structure, and from top to bottom, it is successively an outflow area 11-1, an extrusion area 11-3, and an inflow area 11-2. Both the outflow area 11-1 and the inflow area 11-2 are of a horn-shaped structure and both ends are of an open structure. The maximum diameter at the bottom of the hyperbolic extrusion degassing pipe 11 is smaller than the maximum diameter at the top of the hyperbolic extrusion degassing pipe 11; the extrusion area 11-3 is of a cylindrical structure, and a plurality of extrusion blocks 11-4 are evenly arranged on the inner wall of the extrusion area 11-3. The extrusion blocks 11-4 are of a hemispherical structure; the hyperbolic extrusion degassing pipe 11 is arranged in the central area inside the reactor body 1, and the top end of the hyperbolic extrusion degassing pipe 11 is at the water outlet liquid level of the reactor body 1; the top of the hyperbolic extrusion degassing pipe 11 is fixed to the top of the inner cavity of the reactor body 1 through a plurality of connecting rods 15; a pressure gas tank 6 is fixed to the top of the reactor body 1, and the inner cavity of the reactor body 1 is communicated with the inner cavity of the pressure gas tank 6 through a plurality of air inlet pipes 5. The top of the pressure gas tank 6 is communicated with the air outlet pipe 16, and a pressure gas valve 7 is arranged on the air outlet pipe 16. The pressure gas tank 6 is communicated with the air inlet of the biogas pipe 8, a biogas pump 9 is arranged on the biogas pipe 8, and the air outlet of the biogas pipe 8 is communicated with the nozzle 10. The nozzle 10 is arranged inside the hyperbolic extrusion degassing pipe 11 and close to the bottom of the hyperbolic extrusion degassing pipe 11; a plurality of stirring rods 3 are evenly arranged in the inner cavity of the reactor body 1 and around the hyperbolic extrusion degassing pipe 11. A stirring paddle 2 is arranged below the stirring rods 3, and the height of the stirring paddle 2 is between the water inlet pipe 13 and the bottom of the hyperbolic extrusion degassing pipe 11; the upper part of the stirring rod 3 is connected to the power output end of the motor 4, and the motor 4 is arranged on the top of the reactor body 1; the elastic filler 12 loaded with organisms is located in the reactor body 1.

[0016] The usage method of the internal and external double-cycle extrusion degassing fully mixed anaerobic reactor of this embodiment is as follows:

[0017] The wastewater to be treated enters the reactor body 1 from the lower part through the water inlet pipe 13. Due to the agitation of the stirring paddle 2, the influent is fully mixed; the biogas generated by the anaerobic reaction of the wastewater to be treated with the sludge on the elastic filler 12 in the reaction zone (the upper part of the water inlet pipe 13) enters the pressure gas tank 6 through the air inlet pipe 5, and then enters the hyperbolic extrusion degassing pipe 11 through the biogas pipe 8 and the nozzle 10. A large amount of gas is ejected at the nozzle 10, driving the liquid to flow, forming as Figure 1In the circulating flow shown, the flow regime in the reactor body 1 is even closer to the completely mixed state. At the same time, due to the existence of the circulating flow, the elastic packing 12 continuously flows with the water. After entering the hyperbolic extrusion degassing pipe 11 from the bottom of the hyperbolic extrusion degassing pipe 11, due to the mutual extrusion between the elastic packings 12 and the extrusion of the extrusion block 11-4, the gas in the elastic packing 12 can be discharged. It will not push and float at the liquid level of the reactor, but continuously flow with the circulating flow. Finally, the effluent flows out from the outlet pipe 14; the generated gas can be collected at the gas outlet pipe 16.

[0018] The bottom opening of the hyperbolic extrusion degassing pipe 11 is smaller than the top opening of the hyperbolic extrusion degassing pipe 11. The small bottom opening results in a fast flow rate, which is convenient for sucking the elastic packing 12 into the hyperbolic extrusion degassing pipe 11; the large top opening diffuses in all directions, avoiding the concentration of the elastic packing 12 at the top and discharging it in all directions.

[0019] The internal and external double-circulation extrusion degassing completely mixed anaerobic reactor of this embodiment has a simple structure. Through the biogas pump 9 arranged outside, the elastic packing 12 can enter the hyperbolic extrusion degassing pipe 11 with the water and mutually extrude and exhaust gas in the middle extrusion area 11-3 of the hyperbolic extrusion degassing pipe 11. At the same time, the biogas pump 9 makes the elastic packing 12 flow out from the upper end of the hyperbolic extrusion degassing pipe 11, forming an internal circulation in the reactor body 1, making the elastic packing 12 continuously circulate and not accumulate. Therefore, the generation of dead zones in the reactor can be avoided. Coupled with the stirring of the stirring paddle 2, the flow regime in the reactor is close to the completely mixed state.

[0020] In this embodiment, part of the biogas generated by the anaerobic reaction in the reactor is collected. The gas is introduced into the hyperbolic extrusion degassing pipe 11 arranged in the center of the reactor through the biogas pump 9. The negative pressure suction effect generated by the rising air flow drives the water flow, and the elastic packing 12 near the lower edge of the hyperbolic extrusion degassing pipe 11 flows into the hyperbolic extrusion degassing pipe 11 with the water. The elastic packing 12 rises with the water flow to the extrusion area 11-3. Due to the limited space, the elastic packings 12 are extruded from each other and collide with the extrusion block 11-4 arranged in the extrusion area 11-3 to complete extrusion and vibration degassing. After degassing, the elastic packing 12 returns to the reaction area between the inner wall of the anaerobic reactor and the outer wall of the hyperbolic extrusion degassing pipe 11 along the upper edge of the hyperbolic extrusion degassing pipe 11, forming an external circulation effect in the horizontal and vertical directions under the action of the stirring device arranged in the reaction area; the elastic packing 12 near the lower edge of the hyperbolic extrusion degassing pipe 11 at the bottom of the reactor enters the extrusion area 11-3 for degassing under the biogas lifting action and then returns to the reaction area along the upper edge of the hyperbolic extrusion degassing pipe 11 to form an internal circulation effect, effectively strengthening the mixing and mass transfer between the packing and the pollutants in the sewage and avoiding the problem of the packing floating on the upper liquid level of the reactor and forming a pile.

[0021] Specific Embodiment 2: The difference between this embodiment and Specific Embodiment 1 is that the nozzle 10 has a horn-shaped structure, and the upper end is the larger end. Others are the same as Specific Embodiment 1.

[0022] Specific Embodiment 3: The difference between this embodiment and Specific Embodiment 1 or 2 is that the ratio of the diameter of the top horizontal plane of the hyperbolic extrusion degassing pipe 11 to the diameter of the horizontal cross-section of the extrusion zone 11-3 is 4:1. Others are the same as Specific Embodiment 1 or 2.

[0023] Specific Embodiment 4: The difference between this embodiment and any one of Specific Embodiments 1 to 3 is that the ratio of the diameter of the bottom horizontal plane of the hyperbolic extrusion degassing pipe 11 to the diameter of the horizontal cross-section of the extrusion zone 11-3 is 2.5:1. Others are the same as any one of Specific Embodiments 1 to 3.

[0024] Specific Embodiment 5: The difference between this embodiment and Specific Embodiment 4 is that 12 extrusion blocks 11-4 are uniformly arranged on the horizontal cross-section of the extrusion zone 11-3. Others are the same as Specific Embodiment 4.

[0025] Specific Embodiment 6: The difference between this embodiment and Specific Embodiment 5 is that the motor 4 is an explosion-proof motor. Others are the same as Specific Embodiment 5.

[0026] Specific Embodiment 7: The difference between this embodiment and Specific Embodiment 6 is that 4 stirring rods 3 are uniformly arranged in the reactor body 1. Others are the same as Specific Embodiment 6.

[0027] Specific Embodiment 8: The difference between this embodiment and Specific Embodiment 7 is that the ratio of the height to the diameter of the reactor body 1 is (2-5):1. Others are the same as Specific Embodiment 7.

[0028] Specific Embodiment 9: The difference between this embodiment and Specific Embodiment 8 is that the distance from the bottom end of the hyperbolic extrusion degassing pipe 11 to the bottom end of the reactor body 1 is one-fourth of the height of the reactor body 1. Others are the same as Specific Embodiment 8.

[0029] Specific Embodiment 10: The difference between this embodiment and Specific Embodiment 9 is that 4 connecting rods 15 are provided. Others are the same as Specific Embodiment 9.

[0030] The present invention is verified by the following tests:

[0031] Test 1: This test is an internal and external double-loop extrusion degassing completely mixed anaerobic reactor, as Figures 1 - 3As shown in the figure, it is specifically composed of a reactor body 1, a stirring paddle 2, a stirring rod 3, a motor 4, an air inlet pipe 5, a pressure gas tank 6, a pressure gas valve 7, a biogas pipe 8, a biogas pump 9, a nozzle 10, a hyperbolic extrusion degassing pipe 11, an elastic filler 12, a water inlet pipe 13, a water outlet pipe 14, a connecting rod 15 and an air outlet pipe 16;

[0032] The elastic filler 12 is a sponge filler - AQUA PPG porous gel biocarrier purchased from Maichun Chemicals (Shanghai) Co., Ltd.

[0033] The water inlet pipe 13 is arranged at the bottom of the outer wall of the reactor body 1, and the water outlet pipe 14 is arranged at the top of the outer wall of the reactor body 1; The hyperbolic extrusion degassing pipe 11 is of a hollow structure, and from top to bottom, it is an outflow area 11 - 1, an extrusion area 11 - 3 and an inflow area 11 - 2. Both the outflow area 11 - 1 and the inflow area 11 - 2 are of a horn-shaped structure and both ends are open structures. The maximum diameter at the bottom of the hyperbolic extrusion degassing pipe 11 is smaller than the maximum diameter at the top of the hyperbolic extrusion degassing pipe 11; The extrusion area 11 - 3 is of a cylindrical structure, and a plurality of extrusion blocks 11 - 4 are evenly arranged on the inner wall of the extrusion area 11 - 3. The extrusion blocks 11 - 4 are of a hemispherical structure; The hyperbolic extrusion degassing pipe 11 is arranged in the central area inside the reactor body 1, and the top end of the hyperbolic extrusion degassing pipe 11 is at the water outlet liquid level of the reactor body 1; The top of the hyperbolic extrusion degassing pipe 11 is fixed to the top of the inner cavity of the reactor body 1 through a plurality of connecting rods 15; A pressure gas tank 6 is fixed to the top of the reactor body 1, and the inner cavity of the reactor body 1 is communicated with the inner cavity of the pressure gas tank 6 through a plurality of air inlet pipes 5. The top of the pressure gas tank 6 is communicated with the air outlet pipe 16, and a pressure gas valve 7 is arranged on the air outlet pipe 16. The pressure gas tank 6 is communicated with the air inlet of the biogas pipe 8, a biogas pump 9 is arranged on the biogas pipe 8, and the air outlet of the biogas pipe 8 is communicated with the nozzle 10. The nozzle 10 is arranged inside the hyperbolic extrusion degassing pipe 11 and close to the bottom of the hyperbolic extrusion degassing pipe 11; A plurality of stirring rods 3 are evenly arranged in the inner cavity of the reactor body 1 and outside the hyperbolic extrusion degassing pipe 11. A stirring paddle 2 is arranged below the stirring rods 3, and the height of the stirring paddle 2 is between the water inlet pipe 13 and the bottom of the hyperbolic extrusion degassing pipe 11; The upper part of the stirring rod 3 is connected to the power output end of the motor 4, and the motor 4 is arranged on the top of the reactor body 1; The elastic filler 12 loaded with organisms is located in the reactor body 1;

[0034] The nozzle 10 is of a horn-shaped structure, and the upper end is the larger end;

[0035] The ratio of the diameter of the top horizontal plane of the hyperbolic extrusion degassing pipe 11 to the diameter of the horizontal cross-section of the extrusion area 11 - 3 is 4:1;

[0036] The ratio of the diameter of the bottom horizontal plane of the hyperbolic extrusion degassing pipe 11 to the diameter of the horizontal cross-section of the extrusion zone 11-3 is 2.5:1;

[0037] On the horizontal cross-section of the extrusion zone 11-3, 12 extrusion blocks 11-4 are evenly arranged;

[0038] The motor 4 is an explosion-proof motor;

[0039] In the reactor body 1, 4 stirring rods 3 are evenly arranged;

[0040] The ratio of the height to the diameter of the reactor body 1 is 1.5:1;

[0041] The distance from the bottom end of the hyperbolic extrusion degassing pipe 11 to the bottom end of the reactor body 1 is one-fourth of the height of the reactor body 1;

[0042] There are 4 connecting rods 15.

[0043] The usage method of the internal and external double-loop extrusion degassing completely mixed anaerobic reactor in this experiment is as follows:

[0044] The wastewater to be treated enters the reactor body 1 from the lower part through the water inlet pipe 13. Due to the agitation of the stirring paddle 2, the influent is fully mixed; the biogas generated by the anaerobic reaction of the wastewater to be treated with the sludge on the elastic filler 12 in the reaction zone (above the water inlet pipe 13) enters the pressure gas tank 6 through the gas inlet pipe 5, and then enters the hyperbolic extrusion degassing pipe 11 through the biogas pipe 8 and the nozzle 10. A large amount of gas is ejected at the nozzle 10, driving the liquid to flow, forming a circulating flow as shown in Figure 1 , and the flow pattern in the reactor body 1 is closer to the completely mixed state; at the same time, due to the existence of the circulating flow, the elastic filler 12 continuously flows with the water. After entering the hyperbolic extrusion degassing pipe 11 from the bottom of the hyperbolic extrusion degassing pipe 11, due to the mutual extrusion between the elastic fillers 12 and the extrusion of the extrusion blocks 11-4, the gas in the elastic filler 12 can be discharged, and it will not push and float at the liquid surface of the reactor, but continuously flow with the circulating flow. Finally, the effluent flows out through the water outlet pipe 14; the generated gas can be collected at the gas outlet pipe 16.

[0045] The bottom opening of the hyperbolic extrusion degassing pipe 11 is smaller than the top opening of the hyperbolic extrusion degassing pipe 11. The small bottom opening has a fast flow rate, which is convenient for sucking the elastic filler 12 into the hyperbolic extrusion degassing pipe 11; the large top opening diffuses around, avoiding the concentration of the elastic filler 12 at the top and discharging it around.

[0046] The internal and external double-loop extrusion degassing and completely mixed anaerobic reactor of this test has a simple structure. Through the biogas pump 9 installed externally, the elastic packing 12 can enter the hyperbolic extrusion degassing pipe 11 with water, and mutually extrude and exhaust in the extrusion area 11-3 in the middle of the hyperbolic extrusion degassing pipe 11. At the same time, the biogas pump 9 makes the elastic packing 12 flow out from the upper end of the hyperbolic extrusion degassing pipe 11, forming an internal loop in the reactor body 1, making the elastic packing 12 continuously circulate without accumulation. Therefore, the generation of dead zones in the reactor can be avoided. Coupled with the agitation of the stirring paddle 2, the flow pattern in the reactor is close to the completely mixed state.

Claims

1. An internal and external double-loop extrusion degassing fully mixed anaerobic reactor, characterized in that The internal and external double-loop extrusion degassing fully mixed anaerobic reactor is composed of a reactor body (1), a stirring paddle (2), a stirring rod (3), a motor (4), an air inlet pipe (5), a pressure gas tank (6), a pressure gas valve (7), a biogas pipe (8), a biogas pump (9), a nozzle (10), a hyperbolic extrusion degassing pipe (11), an elastic filler (12), a water inlet pipe (13), a water outlet pipe (14), a connecting rod (15) and an air outlet pipe (16). The water inlet pipe (13) is arranged at the bottom of the outer side wall of the reactor body (1), and the water outlet pipe (14) is arranged at the top of the outer side wall of the reactor body (1); the hyperbolic extrusion degassing pipe (11) is of a hollow structure, and from top to bottom, it is successively an outflow area (11-1), an extrusion area (11-3) and an inflow area (11-2). The outflow area (11-1) and the inflow area (11-2) are both of a trumpet-shaped structure and both ends are of an open structure. The maximum diameter of the bottom of the hyperbolic extrusion degassing pipe (11) is smaller than the maximum diameter of the top of the hyperbolic extrusion degassing pipe (11); the extrusion area (11-3) is of a cylindrical structure, and a plurality of extrusion blocks (11-4) are uniformly arranged on the inner wall of the extrusion area (11-3). The extrusion blocks (11-4) are of a hemispherical structure; the hyperbolic extrusion degassing pipe (11) is arranged in the central area inside the reactor body (1), and the top end of the hyperbolic extrusion degassing pipe (11) is at the water outlet liquid level of the reactor body (1); the top of the hyperbolic extrusion degassing pipe (11) is fixed to the top of the inner cavity of the reactor body (1) through a plurality of connecting rods (15); a pressure gas tank (6) is fixed to the top of the reactor body (1), and the inner cavity of the reactor body (1) is communicated with the inner cavity of the pressure gas tank (6) through a plurality of air inlet pipes (5). The top of the pressure gas tank (6) is communicated with the air outlet pipe (16), and a pressure gas valve (7) is arranged on the air outlet pipe (16). The pressure gas tank (6) is communicated with the air inlet of the biogas pipe (8), a biogas pump (9) is arranged on the biogas pipe (8), and the air outlet of the biogas pipe (8) is communicated with the nozzle (10). The nozzle (10) is arranged inside the hyperbolic extrusion degassing pipe (11) and close to the bottom of the hyperbolic extrusion degassing pipe (11); a plurality of stirring rods (3) are uniformly arranged in the inner cavity of the reactor body (1) and on the periphery of the hyperbolic extrusion degassing pipe (11). A stirring paddle (2) is arranged below the stirring rod (3), and the height of the stirring paddle (2) is between the water inlet pipe (13) and the bottom of the hyperbolic extrusion degassing pipe (11); the upper part of the stirring rod (3) is connected to the power output end of the motor (4), and the motor (4) is arranged on the top of the reactor body (1); the elastic filler (12) loaded with organisms is located in the reactor body (1).

2. The internal and external double-loop extrusion degassing and fully mixed anaerobic reactor according to claim 1, characterized in that The nozzle (10) is of a trumpet-shaped structure, and the upper end is the larger end.

3. The internal and external double-loop extrusion degassing and completely mixed anaerobic reactor according to claim 1, characterized in that The ratio of the diameter of the top horizontal plane of the hyperbolic extrusion degassing pipe (11) to the diameter of the horizontal cross-section of the extrusion area (11-3) is 4:

1.

4. A fully mixed anaerobic reactor with internal and external double-loop extrusion degassing according to claim 1, characterized in that The ratio of the diameter of the bottom horizontal plane of the hyperbolic extrusion degassing pipe (11) to the diameter of the horizontal cross-section of the extrusion area (11-3) is 2.5:

1.

5. A fully mixed anaerobic reactor with internal and external double-loop extrusion degassing according to claim 1, characterized in that There are 12 extrusion blocks (11-4) evenly arranged on the horizontal section of the extrusion zone (11-3).

6. The internal and external double-cycle extrusion degassing fully mixed anaerobic reactor according to claim 1, wherein The motor (4) is an explosion-proof motor.

7. A fully mixed anaerobic reactor with internal and external double-loop extrusion degassing according to claim 1, characterized in that There are 4 stirring rods (3) evenly arranged in the reactor body (1).

8. The internal and external double-loop extrusion degassing and fully mixed anaerobic reactor according to claim 1, characterized in that The ratio of the height to the diameter of the reactor body (1) is (2 to 5):

1.

9. A kind of internal and external double-cycle extrusion degassing and completely mixed anaerobic reactor according to claim 1, characterized in that The distance from the bottom end of the hyperbolic extrusion and gas discharge pipe (11) to the bottom end of the reactor body (1) is one-fourth of the height of the reactor body (1).

10. A fully mixed anaerobic reactor with internal and external double-loop extrusion degassing according to claim 1, characterized in that There are 4 connecting rods (15).

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