An anaerobic external circulation reactor applied to high-concentration organic wastewater treatment

Abstract

The application discloses an anaerobic external circulation reactor applied to high-concentration organic wastewater treatment and relates to the field of organic wastewater treatment devices.The reactor body and a reflux pump are arranged outside the reactor body;the reactor body is internally provided with a steam-water separation assembly;the steam-water separation assembly is slidably arranged on the inner wall of the reactor body;and a first sieve plate is fixedly arranged below the steam-water separation assembly in the reactor body.The reflux pump is used to suck water in the reactor into the steam-water separation assembly;gas in the reactor body is separated and filtered by the separator to form biogas;the biogas is recycled into the reactor body;the steam-water separation assembly uses the high-pressure gas mist formed by mixing the reflux water provided by the reflux pump with the biogas to separate the water with large specific gravity from the gas with small specific gravity;the biogas is subjected to secondary filtration treatment;the purity of the biogas is improved;and the utilization rate of the biogas is ensured.

Description

Technical Field

[0001] This invention relates to the field of organic wastewater treatment devices, specifically an anaerobic external circulation reactor for treating high-concentration organic wastewater. Background Technology

[0002] Anaerobic biological treatment is an important method for treating organic wastewater. Currently, commonly used anaerobic reactors include upflow anaerobic sludge blanket (UASB) and internal circulation anaerobic reactors (IC). UASB mainly relies on the formation of granular sludge and the action of a three-phase separator to retain sludge in the reactor, achieving a sludge retention time (SRT) greater than the hydraulic retention time (HRT). This increases the sludge concentration in the reactor to some extent. However, the mass transfer process in the reactor is not ideal. To improve the mass transfer effect, it is necessary to increase the surface hydraulic loading and surface gas generation loading, which leads to sludge loss and affects the treatment effect.

[0003] The internal circulation anaerobic reactor IC is an optimization based on the upflow anaerobic sludge blanket (UASB) reactor. It has a large height-to-diameter ratio, small footprint, increased organic load, and improved resistance to load shocks through effluent recirculation. It achieves internal circulation through biogas boosting, resulting in low power consumption. However, the internal circulation pipes make the reactor's internal structure complex, and it has disadvantages such as easy corrosion and low biogas utilization rate. Summary of the Invention

[0004] Based on this, the purpose of the present invention is to provide an anaerobic external circulation reactor for the treatment of high-concentration organic wastewater, so as to solve the technical problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an anaerobic external circulation reactor for treating high-concentration organic wastewater, comprising a reactor body and a reflux pump, wherein the reflux pump is disposed outside the reactor body, and a gas-liquid separation component is disposed inside the reactor body, the gas-liquid separation component being slidably installed on the inner wall of the reactor body, a first sieve plate being fixedly installed below the gas-liquid separation component inside the reactor body, a reflux chamber being disposed at the bottom of the reactor body, a second sieve plate being disposed at the top of the reflux chamber, the gas-liquid separation component including an mounting plate movably installed inside the reactor body, multiple sets of high-pressure nozzles being installed at the bottom of the mounting plate, a first nozzle being fixed at the center of the bottom of the high-pressure nozzle, multiple sets of second nozzles being installed at the bottom of the high-pressure nozzle, and a biogas circulation pipe being disposed on one side of the reactor body.

[0006] By adopting the above technical solution, water in the reactor is drawn into the gas-water separation component by a reflux pump. The gas in the reactor body is separated and filtered by the separator to form biogas. The biogas is then recycled back into the reactor body. The gas-water separation component uses the high-pressure mist formed by the reflux water provided by the reflux pump and the biogas to separate the heavy water and the light gas, thus performing secondary filtration of the biogas, improving its purity and ensuring its utilization rate.

[0007] The present invention is further configured such that multiple sets of fixing plates are fixed inside the first sieve plate, and the fixing plates and the second nozzle are arranged in a one-to-one correspondence in the vertical direction.

[0008] By adopting the above technical solution, the fixed plate can cooperate with the second nozzle and the first nozzle. When the second nozzle and the first nozzle spray liquid, they come into contact with the fixed plate, thereby forming a reaction force, which causes the mounting plate to slide inside the reactor body.

[0009] The present invention is further configured such that a collection hopper and a return pipe are provided in the return chamber, the return pipe passes through the reactor body and extends to the outside of the reactor body, the return pipe is connected to a return pump, and a water purification processor is provided between the return pipe and the return pump.

[0010] By adopting the above technical solution, the liquid can be collected better through the collection hopper, and the return pump extracts the liquid collected in the collection hopper through the return pipe, so that the liquid can be reused.

[0011] The present invention is further configured such that a connecting pipe is installed at the output end of the reflux pump, and a corrugated pipe is provided at the end of the connecting pipe, and the corrugated pipe is connected to the gas-water separation component.

[0012] By adopting the above technical solution, the liquid can be transported to the corrugated pipe through the connecting pipe, and the corrugated pipe can transport the liquid to the steam-water separation component. When the steam-water separation component slides inside the reactor body, the corrugated pipe deforms without affecting the liquid transport.

[0013] The present invention is further configured such that one end of the biogas circulation pipe extends into the interior of the reactor body, and an air inlet is provided at the top of the reactor body, and the air inlet is connected to the other end of the biogas circulation pipe, and one end of the biogas circulation pipe is inclined.

[0014] By adopting the above technical solution, the inclined biogas circulation pipe prevents liquid from entering the biogas circulation pipe when it falls, thus avoiding the problem of blockage. The biogas enters the top of the reactor body through the air inlet and is purified.

[0015] The present invention is further configured such that an inlet pipe is installed on one side of the top of the reactor body, and a valve is provided at the end of the inlet pipe; an exhaust pipe is installed on the other side of the top of the reactor body, and a solenoid valve is installed inside the exhaust pipe.

[0016] By adopting the above technical solution, the liquid inlet pipe facilitates the addition of liquid into the reactor body, the valve closure ensures the sealing of the reactor body, the exhaust pipe facilitates the discharge of biogas, and the solenoid valve can be opened to discharge biogas.

[0017] The invention is further configured such that multiple sets of sliders are fixed on both sides of the mounting plate, and the slider cross-section is set as semi-circular, and the inner wall of the reactor body is provided with a sliding groove.

[0018] By adopting the above technical solution, the mounting plate can slide inside the reactor body through the cooperation of the slider and the groove. The semi-circular slider reduces the friction between the slider and the reactor body.

[0019] The present invention is further configured such that a protective cover is fixed inside the reactor body below the first sieve plate, and the protective cover is conical in shape, a collar is fixed on the outer wall of the protective cover, and a leakage hole is opened on the upper part of the protective cover.

[0020] By adopting the above technical solution, water falls above the protective cover and falls through the leak. Since the flow rate of the dripping water from the leak is less than the flow rate of the water falling from the high-pressure nozzle, water will accumulate inside the collar, while biogas will accumulate above the protective cover. Under the action of gas pressure, the biogas enters the biogas circulation pipe, so that the biogas is located in the middle of the reactor body. When the biogas accumulates inside the reactor body, it enters the interior of the biogas circulation pipe better under the action of pressure.

[0021] In summary, the present invention has the following main beneficial effects:

[0022] This invention incorporates a gas-water separation component, a reflux pump, a first sieve plate, and a protective cover. The reflux pump draws water from the reactor into the gas-water separation component, while the gas in the reactor body is separated and filtered by the separator to form biogas. The biogas is then recirculated back into the reactor body. The gas-water separation component utilizes the high-pressure aerosol formed by the mixing of the reflux water and biogas provided by the reflux pump to separate the heavier water and lighter gas, thus performing a secondary filtration of the biogas, improving its purity and ensuring its utilization rate. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the structure of the steam-water separation component of the present invention;

[0025] Figure 3 This is a perspective view of the protective cover of the present invention;

[0026] Figure 4 This is a schematic diagram of the bottom of the protective cover of the present invention;

[0027] Figure 5 This is a perspective view of the first sieve plate of the present invention.

[0028] In the diagram: 1. Reactor body; 11. Slide chute; 12. Air inlet; 13. Liquid inlet pipe; 14. Exhaust pipe; 2. Gas-water separation assembly; 21. Mounting plate; 22. High-pressure nozzle; 23. First nozzle; 24. Second nozzle; 25. Sliding block; 3. Return chamber; 31. Collection hopper; 32. Return pipe; 4. First sieve plate; 41. Fixing plate; 5. Biogas circulation pipe; 6. Second sieve plate; 7. Return pump; 71. Connecting pipe; 72. Corrugated pipe; 8. Water purifier; 9. Protective cover; 91. Collar; 92. Leakage hole. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0030] The embodiments of the present invention will now be described.

[0031] An anaerobic external circulation reactor for treating high-concentration organic wastewater, such as Figures 1-5As shown, the reactor includes a reactor body 1 and a reflux pump 7. The reflux pump 7 is located outside the reactor body 1. A steam-water separation assembly 2 is installed inside the reactor body 1, and the steam-water separation assembly 2 is slidably installed on the inner wall of the reactor body 1. A first screen plate 4 is fixedly installed inside the reactor body 1 below the steam-water separation assembly 2. When the reflux pump 7 is working, it uses the reflux water in the reflux pump 7 to supply high-pressure nozzles 22. During production, multiple sets of high-pressure nozzles 22 are fixedly connected, and the reflux pipe 32 achieves simultaneous water supply. The first nozzle 23 and the second nozzle 24 operate simultaneously. The high-pressure water jet of the second nozzle 24 reacts with the fixed plate 41, causing the mounting plate 21 to move upward. The reactor body 1 has a reflux chamber 3 at its bottom and a second sieve plate 6 at its top. The gas-water separation component 2 includes a mounting plate 21 that is movably installed inside the reactor body 1. Multiple sets of high-pressure nozzles 22 are installed at the bottom of the mounting plate 21. A first nozzle 23 is fixed at the center of the bottom of the high-pressure nozzle 22. Multiple sets of second nozzles 24 are installed at the bottom of the high-pressure nozzle 22. A biogas circulation pipe 5 is provided on one side of the reactor body 1. The gas-water separation component 2 floats with the gas by using a slider 25 and a chute 11. This allows the gas-water separation component 2 to more fully separate the gas and water from the biogas, achieving secondary filtration of the biogas and improving its purity.

[0032] Please see Figure 1 and Figure 5 The first sieve plate 4 has multiple sets of fixing plates 41 fixed inside. The fixing plates 41 and the second nozzle 24 are arranged in a vertical direction. The fixing plates 41 can cooperate with the second nozzle 24 and the first nozzle 23. When the second nozzle 24 and the first nozzle 23 spray liquid, they come into contact with the fixing plates 41, thereby forming a reaction force, which makes the mounting plate 21 slide inside the reactor body 1.

[0033] Please see Figure 1 The reflux chamber 3 is equipped with a collection hopper 31 and a reflux pipe 32. The reflux pipe 32 passes through the reactor body 1 and extends to the outside of the reactor body 1. The reflux pipe 32 is connected to the reflux pump 7, and a water purification processor 8 is installed between the reflux pipe 32 and the reflux pump 7. The collection hopper 31 allows the liquid to be collected better. The reflux pump 7 extracts the liquid collected by the collection hopper 31 through the reflux pipe 32 for reuse. The water purification processor 8 filters the liquid.

[0034] Please see Figure 1 and Figure 2The output end of the reflux pump 7 is equipped with a connecting pipe 71, and the end of the connecting pipe 71 is provided with a bellows 72. The bellows 72 is connected to the gas-water separation component 2. The liquid can be conveyed into the bellows 72 through the connecting pipe 71, and the bellows 72 can convey the liquid to the gas-water separation component 2. When the gas-water separation component 2 slides inside the reactor body 1, the bellows 72 deforms, which will not affect the liquid transmission.

[0035] Please see Figure 1 One end of the biogas circulation pipe 5 extends into the interior of the reactor body 1, and an air inlet 12 is provided at the top of the reactor body 1. The air inlet 12 is connected to the other end of the biogas circulation pipe 5. One end of the biogas circulation pipe 5 is inclined. The inclined biogas circulation pipe 5 prevents liquid from entering the biogas circulation pipe 5 when it falls, thus avoiding the problem of blockage of the biogas circulation pipe 5. The biogas enters the top of the reactor body 1 through the air inlet 12 and completes the purification.

[0036] Please see Figure 1 A liquid inlet pipe 13 is installed on one side of the top of the reactor body 1, and a valve is provided at the end of the liquid inlet pipe 13. An exhaust pipe 14 is installed on the other side of the top of the reactor body 1, and a solenoid valve is installed inside the exhaust pipe 14. Liquid can be easily added into the reactor body 1 through the liquid inlet pipe 13. Closing the valve can ensure the sealing of the reactor body 1. The exhaust pipe 14 can easily discharge biogas. The biogas can be discharged by opening the solenoid valve.

[0037] Please see Figure 1 and Figure 2 Multiple sets of sliders 25 are fixed on both sides of the mounting plate 21, and the cross-section of the sliders 25 is set as semi-circular. The inner wall of the reactor body 1 is provided with a sliding groove 11. The mounting plate 21 slides inside the reactor body 1 by the cooperation of the sliders and the sliding groove 11. The semi-circular sliders 25 reduce the friction between the sliders and the reactor body 1.

[0038] Please see Figure 1 , Figure 3 and Figure 4 Inside the reactor body 1, below the first sieve plate 4, a protective cover 9 is fixed. The protective cover 9 is conical in shape, and a collar 91 is fixed to the outer wall of the protective cover 9. A drain hole 92 is opened on the top of the protective cover 9. Water falls above the protective cover 9 and falls through the drain hole 92. Since the flow rate of the dripping water from the drain hole 92 is less than the flow rate of the water falling from the high-pressure nozzle 22, water will accumulate in the collar. Meanwhile, biogas will accumulate above the protective cover 9. Under the action of gas pressure, the biogas enters the biogas circulation pipe 5, so that the biogas is located in the middle of the reactor body 1. When the biogas inside the reactor body 1 accumulates, it enters the biogas circulation pipe 5 better under the action of pressure.

[0039] The working principle of this invention is as follows: Organic wastewater is added to the reactor body 1, and the reflux pump 7 is started. When the reflux pump 7 is working, the reflux water in the reflux pump 7 is used to supply the high-pressure nozzles 22. During production, multiple sets of high-pressure nozzles 22 are fixedly connected, and the reflux pipe 32 achieves simultaneous water supply. The first nozzle 23 and the second nozzle 24 operate simultaneously. The high-pressure water jet of the second nozzle 24 reacts with the fixed plate 41, causing the mounting plate 21 to move upward. The slider 25 and the slide groove 11 work together to make the gas-water separation component 2 float with the gas, which facilitates more complete gas-water separation of the biogas by the gas-water separation component 2, realizes secondary filtration of biogas, improves the purity of biogas, and ensures its utilization rate. Water falls above the protective cover 9 and drips through the drain hole 92. Since the flow rate of water dripping from the drain hole 92 is less than the flow rate of water dripping from the high-pressure nozzle 22, water will accumulate inside the collar, while biogas will accumulate above the protective cover 9. Under the action of air pressure, the biogas enters the biogas circulation pipe 5, preventing biogas from filling the bottom of the reactor body 1. A one-way valve is installed in the biogas circulation pipe 5. Since the air pressure inside the reactor body 1 is greater than the air pressure in the biogas circulation pipe 5, it ensures that biogas can enter the top of the reactor body 1 through the air inlet 12 via the biogas circulation pipe 5. Opening the solenoid valve allows the biogas to be discharged through the exhaust pipe 14. The exhaust pipe 14 is connected to an external pipeline to collect the biogas.

[0040] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the invention and are not intended to limit it. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the invention, but such modifications, substitutions, and variations are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. An anaerobic external circulation reactor for treating high-concentration organic wastewater, comprising a reactor body (1) and a reflux pump (7), wherein the reflux pump (7) is disposed outside the reactor body (1), characterized in that: The reactor body (1) is equipped with a steam-water separation component (2), which is slidably installed on the inner wall of the reactor body (1). A first sieve plate (4) is fixedly installed below the steam-water separation component (2) inside the reactor body (1). A reflux chamber (3) is provided at the bottom of the reactor body (1), and a second sieve plate (6) is provided at the top of the reflux chamber (3). The steam-water separation component (2) includes an installation plate (21) movably installed inside the reactor body (1). Multiple... A high-pressure nozzle (22) is provided, with a first nozzle (23) fixed at the center of the bottom of the high-pressure nozzle (22). Multiple sets of second nozzles (24) are installed at the bottom of the high-pressure nozzle (22). A biogas circulation pipe (5) is provided on one side of the reactor body (1). A protective cover (9) is fixed inside the reactor body (1) below the first screen plate (4). The protective cover (9) is conical. A collar (91) is fixed on the outer wall of the protective cover (9). A leakage hole (92) is opened on the top of the protective cover (9). The inside of the first screen plate (4) is fixed. There are multiple sets of fixing plates (41), and the fixing plates (41) and the second nozzle (24) are arranged one-to-one in the vertical direction; a collection hopper (31) and a return pipe (32) are provided in the return chamber (3), the return pipe (32) passes through the reactor body (1) and extends to the outside of the reactor body (1), the return pipe (32) is connected to the return pump (7), and a water purifier (8) is provided between the return pipe (32) and the return pump (7); a connecting pipe (71) is installed at the output end of the return pump (7), and the end of the connecting pipe (71) is provided with A corrugated pipe (72) is provided and connected to the gas-water separation component (2); multiple sets of sliders (25) are fixed on both sides of the mounting plate (21), and the cross section of the sliders (25) is set as semi-circular. A groove (11) is opened on the inner wall of the reactor body (1); one end of the biogas circulation pipe (5) extends into the interior of the reactor body (1), and an air inlet (12) is provided at the top of the reactor body (1), and the air inlet (12) is connected to the other end of the biogas circulation pipe (5). One end of the biogas circulation pipe (5) is inclined.

2. The anaerobic external circulation reactor for treating high-concentration organic wastewater according to claim 1, characterized in that: A liquid inlet pipe (13) is installed on one side of the top of the reactor body (1), and a valve is provided at the end of the liquid inlet pipe (13). An exhaust pipe (14) is installed on the other side of the top of the reactor body (1), and a solenoid valve is installed inside the exhaust pipe (14).

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