An intensified stirred ABR reactor

Abstract

The utility model provides a kind of reinforced stirring ABR reactor, it is related to sewage treatment technical field, to solve the technical problem of low pool capacity utilization of ABR reactor in prior art;A kind of reinforced stirring ABR reactor, including regulating pool, booster pump, ABR reactor ontology and water inlet pipe, booster pump is located in regulating pool, ABR reactor ontology includes clean water pool and at least three ABR reaction bins, each ABR reaction bin is equipped with the vertical flow guide plate, the flow guide plate is divided into guide area and reaction zone, the channel that the flow guide plate bottom end and ABR reaction bin bottom end form intercommunication guide area and reaction zone, each reaction zone is equipped with filler and stirring assembly, clean water pool is connected with reaction zone, water inlet pipe is connected with booster pump and first guide area.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to an enhanced stirred ABR reactor. Background Technology

[0002] Currently, with the acceleration of urbanization and industrial development, the corresponding amount of wastewater generated is also increasing. In existing technologies, the anaerobic baffled reactor (ABR reactor) is a high-efficiency anaerobic reactor composed of multiple reaction chambers, each of which is a relatively independent upflow sludge bed system. Wastewater enters the ABR reactor and flows along the baffled walls, reacting with microorganisms attached to the packing material, thereby removing pollutants from the wastewater. Wastewater flows sequentially through each reaction chamber from the inlet along a baffled path, increasing the reaction time within the system and improving overall reaction efficiency. However, due to the long residence time and large volume of the ABR reactor, relying solely on hydraulic baffles results in a low upward flow velocity of the wastewater, insufficient to keep the sludge in suspension. The sludge tends to accumulate at the bottom of the chambers, failing to fully react with the wastewater.

[0003] Chinese patent CN206273787U discloses a wastewater treatment device based on the ABR process, including a pulse-type water distributor, an ABR reaction chamber, a delivery pipe, a distribution pipe, and at least one baffle plate. The delivery pipe is connected to the distribution pipe via the pulse-type water distributor, and then to the ABR reaction chamber. The baffle plates are spaced apart inside the ABR reaction chamber, extending from the top to the bottom, isolating the ABR reaction chamber into at least one upward flow chamber and at least one downward flow chamber connected in series, forming a meandering drainage channel with upward and downward flow. This patent uses a pulse-type water distributor, which divides the inlet water into four branches entering four ABR reaction chambers, pulse-distributing water to each chamber. However, the opening of the solenoid valve is not adjustable, making it difficult to control the water distribution volume. Furthermore, introducing inlet water into reaction chambers other than the first one shortens the residence time of wastewater within the reaction chamber, affecting the effluent quality. In addition, the hydraulic stirring using pulsed water distribution cannot fully stir the ABR reaction chamber, resulting in dead zones and low tank capacity utilization. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an enhanced stirred ABR reactor to solve the technical problem of low tank volume utilization rate in the existing ABR reactor.

[0005] To solve the above technical problems, this utility model provides an enhanced stirred ABR reactor, comprising: Equalization tank; The booster pump is located inside the equalization tank; The ABR reactor body includes a clear water tank and at least three ABR reaction chambers. Each ABR reaction chamber is equipped with a vertically arranged baffle plate, which divides the ABR reaction chamber into a flow guiding zone and a reaction zone. A channel connecting the flow guiding zone and the reaction zone is formed between the bottom end of the baffle plate and the bottom end of the ABR reaction chamber. Each reaction zone is equipped with packing and a stirring assembly. The clear water tank is connected to the reaction zone. The inlet pipe connects the booster pump and the first diversion zone.

[0006] With the above structure, the enhanced stirring ABR reactor of this utility model has the following advantages: the booster pump pumps the sewage in the equalization tank into the first guide zone through the inlet pipe. The sewage passes through the guide zone and the reaction zone in sequence in the ABR reaction chamber via a baffle path, and reacts with the packing material in the reaction zone. Even when multiple ABR reaction chambers are set, all sewage will pass through each ABR reaction chamber in sequence, increasing the residence time of sewage in the ABR reaction chamber and improving the effluent quality. Moreover, a stirring component is set in the reaction zone of each ABR reaction chamber. The stirring component replaces the hydraulic stirring of pulse water distribution, improving the stirring effect, reducing dead zones in the chamber, and thus improving the tank capacity utilization rate.

[0007] As an improvement, the ABR reactor body is equipped with several baffles spaced sequentially along the inlet direction. These baffles divide the ABR reactor body into several ABR reaction chambers and a clear water tank. The inlet pipe connects to the upper part of the guide zone of the first ABR reaction chamber. Each baffle has a first water passage hole at its upper part, which connects the reaction zone with the guide zone of the adjacent ABR reaction chamber or the reaction zone of the last ABR reaction chamber with the clear water tank. The packing material is placed between the guide plates and the baffles. With this structure, the sewage passes through each reaction zone in a baffled manner, optimizing the water flow path and increasing the residence time and reaction efficiency of the sewage in the ABR reaction chamber.

[0008] As an improvement, a return pump is installed in the clear water tank, which is connected to a main return pipe. The main return pipe is connected to at least three return branch pipes corresponding one-to-one with the ABR reaction chambers. Each return branch pipe is connected in series with a return control valve. Each ABR reaction chamber has a return channel at the top, and the return branch pipes are connected to the return channel, which is connected to the guide zone. With this structure, part of the treated wastewater is returned to the guide zone to dilute and mix with the influent, improving the system's shock resistance. It also increases the upward flow velocity in the ABR reaction chamber, increasing the contact between wastewater and sludge. In addition, the water distribution in the ABR reaction chamber consists of both influent and return water. The return flow is controlled by the return control valve, making the water distribution adjustable and enhancing the system's flexibility and stability.

[0009] As an improvement, the return channel is located in the reaction zone. One end of the return channel is connected to the guide plate, and the other end is connected to the side wall of the ABR reaction chamber. The guide plate is provided with a second water passage for connecting the guide zone and the return channel.

[0010] As an improvement, the mixing assembly includes a water bucket wheel, a guide rod, and a mixer. The water bucket wheel rotates within the return channel, with the upper end of the guide rod connected to the water bucket wheel and the lower end connected to the mixer. This structure utilizes the power of the return water to drive the water bucket wheel to rotate, which in turn drives the mixer via the guide rod, achieving mechanical mixing without external power, thus saving energy and protecting the environment. The mixer actively mixes the reaction zone, suspending the sludge at the bottom within the ABR reaction chamber, allowing for more thorough contact between wastewater and sludge, and improving tank capacity utilization.

[0011] As an improvement, the agitator is a turbine agitator; this structure further optimizes the agitation performance and improves the utilization rate of the tank volume.

[0012] As an improvement, this utility model also includes a sludge discharge main pipe, a sludge discharge pump, and at least three sludge discharge branch pipes. Each reaction zone has one sludge discharge branch pipe, and each sludge discharge branch pipe is connected in series with a sludge discharge control valve. Each sludge discharge branch pipe has a sludge suction port at its bottom end. All sludge discharge branch pipes are connected to the sludge discharge main pipe, and the sludge discharge pump is connected to the sludge discharge main pipe. With this structure, centralized and controllable sludge discharge operation is achieved, and excess sludge can be discharged periodically or continuously to prevent excessive sludge accumulation. The sludge discharge control valve allows independent adjustment of the sludge discharge rate of each reaction zone, optimizing the sludge concentration and maintaining stable operation of the reactor.

[0013] As an improvement, each sludge discharge branch pipe is equipped with a horizontal section at its bottom, and several sludge suction ports are equidistantly arranged along the horizontal direction on the horizontal section. This structure expands the sludge discharge coverage area, ensures uniform suction of sludge at the bottom of the reaction zone, avoids local sludge accumulation and dead corner formation, and improves sludge discharge efficiency and system cleanliness.

[0014] As an improvement, the clear water tank is connected to an outlet pipe; this structure provides a channel for the discharge of treated wastewater. Attached Figure Description

[0015] Figure 1 This is the front view of the present invention.

[0016] Figure 2 This is a top view of the present invention.

[0017] Figure 3 This is the left view of the present invention.

[0018] Reference numerals: 1. Equalization tank; 2. Booster pump; 3. Clear water tank; 4. ABR reaction chamber; 41. Guide zone; 42. Reaction zone; 5. Guide plate; 6. Packing material; 7. Agitator assembly; 71. Water impeller; 72. Guide rod; 73. Agitator; 8. Inlet pipe; 9. Baffle plate; 10. First water passage; 11. Return pump; 12. Return main pipe; 13. Return branch pipe; 14. Return control valve; 15. Return channel; 16. Second water passage; 17. Sludge discharge main pipe; 18. Sludge discharge pump; 19. Sludge discharge branch pipe; 20. Sludge discharge control valve; 21. Horizontal section; 22. Outlet pipe. Detailed Implementation

[0019] The following is a detailed description of an enhanced stirring ABR reactor according to the present invention, with reference to the accompanying drawings.

[0020] like Figures 1 to 3 As shown, an enhanced stirring ABR reactor includes an equalization tank 1, a booster pump 2, an ABR reactor body, and an inlet pipe 8. The booster pump 2 is located inside the equalization tank 1. The ABR reactor body includes a clear water tank 3 and at least three ABR reaction chambers 4. Each ABR reaction chamber 4 is equipped with a vertically arranged guide plate 5, which divides the ABR reaction chamber 4 into a guide zone 41 and a reaction zone 42. The upper end of the guide plate 5 is closed to the upper interior of the ABR reaction chamber 4, and the lower end of the guide plate 5 forms a channel connecting the guide zone 41 and the reaction zone 42 with the lower end of the ABR reaction chamber 4. Each reaction zone 42 is equipped with packing material 6 and a stirring assembly 7. The clear water tank 3 is connected to the reaction zone 42, and the inlet pipe 8 is connected to the booster pump 2 and the first guide zone 41. The clear water tank 3 is connected to an outlet pipe 22.

[0021] The ABR reactor body is equipped with several baffles 9 spaced apart along the water inlet direction, meaning the water inlet direction is generally from left to right. These baffles 9 divide the ABR reactor body into several ABR reaction chambers 4 and a clear water tank 3. The baffles 9 are parallel to the guide plates 5. The last area from left to right is the clear water tank 3, and the other areas are the ABR reaction chambers 4 arranged sequentially along the left-right direction. The inlet pipe 8 connects to the upper part of the guide zone 41 of the first ABR reaction chamber 4. Each baffle 9 has a first water passage hole 10 at its upper part, allowing the reaction zone 42 to connect with the guide zone 41 of the adjacent ABR reaction chamber 4 or the reaction zone 42 of the last ABR reaction chamber 4 to the clear water tank 3. The packing material 6 is placed between the guide plates 5 and the baffles 9. Water in the guide zone 41 flows downwards and then upwards in the reaction zone 42 after passing through the channel. Packing material 6 is a combined packing material, and its specific structure and installation method are existing technologies, which will not be described in detail here.

[0022] like Figure 1 and Figure 2As shown, a reflux pump 11 is installed in the clear water tank 3. The reflux pump 11 is connected to a reflux main pipe 12. The reflux main pipe 12 is connected to at least three reflux branch pipes 13, which correspond one-to-one with the ABR reaction chambers 4. In this embodiment, there are a total of three ABR reaction chambers 4. Therefore, there are also three reflux branch pipes 13. A reflux control valve 14 is connected in series on each reflux branch pipe 13. A reflux channel 15 is provided in the upper part of each ABR reaction chamber 4. The reflux branch pipes 13 are connected to the reflux channel 15. The reflux channel 15 is connected to the flow guide area 41.

[0023] Specifically, such as Figure 1 As shown, the return channel 15 is located in the reaction zone 42. One end of the return channel 15 is connected to the guide plate 5, and the other end of the return channel 15 is connected to the side wall of the ABR reaction chamber 4, which is the partition plate 9. That is to say, the two ends of the return channel 15 are connected to the guide plate 5 and the partition plate 9 respectively. The guide plate 5 is provided with a second water passage hole 16 for connecting the guide zone 41 and the return channel 15.

[0024] like Figure 1 As shown, the stirring assembly 7 includes a water bucket wheel 71, a guide rod 72, and a stirrer 73. The water bucket wheel 71 is rotatably disposed in the return channel 15. The upper end of the guide rod 72 is connected to the water bucket wheel 71, and the lower end of the guide rod 72 is connected to the stirrer 73. The stirrer 73 is a turbine stirrer.

[0025] After entering the equalization tank 1, the wastewater is pumped into the inlet pipe 8 by the lift pump 2 and enters the guide zone 41 of the first ABR reaction chamber 4. The wastewater enters the bottom of the reaction zone 42 along the guide plate 5. A large number of microorganisms are attached to the surface of the packing material 6. The wastewater passes through the packing material 6 from bottom to top, which can fully react with the microorganisms attached to the packing material 6. At the same time, the packing material 6 can prevent sludge from being lost into the next ABR reaction chamber 4. The wastewater enters the guide zone 41 of the next ABR reaction chamber 4 through the first water passage 10 at the top of the baffle 9. This makes the reaction zone 42 of each ABR reaction chamber 4 a bottom inlet and top outlet, avoiding dead zones in the reaction zone 42 and improving the tank capacity utilization rate. In addition, all wastewater will pass through each ABR reaction chamber 4 in sequence, increasing the residence time of wastewater in the ABR reaction chamber 4 and improving the effluent quality.

[0026] When the return pump 11 is turned on, and a larger impact force is required, one of the return control valves 14 is opened while the others are closed. The return pump 11 lifts the sewage in the clear water tank 3 into the return channel 15 corresponding to the return control valve 14. The sewage entering the return channel 15 has a certain pressure, which impacts the rotation of the water impeller 71, driving the guide rod 72 and the agitator 73 to rotate. At the same time, the return sewage enters the guide zone 41 through the second water passage 16, increasing the upward flow velocity in the reaction zone 42 and increasing the contact between wastewater and sludge. By using turbine agitation and sewage deflection motion, the water and sludge agitation in the ABR reaction chamber 4 can be enhanced, so that the sludge at the bottom is suspended in the reaction zone 42, and the sewage and sludge have more sufficient contact, improving the tank capacity utilization rate. At the same time, the sewage from the clear water tank 3 flows back into the ABR reaction chamber 4, which can dilute the sewage in the ABR reaction chamber 4 and enhance the system's shock resistance. For operating conditions where the agitation intensity is not required, multiple or all of the return control valves 14 can be opened.

[0027] In addition, such as Figure 2 and Figure 3 As shown, this utility model also includes a sludge discharge main pipe 17, a sludge discharge pump 18, and at least three sludge discharge branch pipes 19. Each reaction zone 42 is provided with a sludge discharge branch pipe 19, and a sludge discharge control valve 20 is connected in series on each sludge discharge branch pipe 19. Each sludge discharge branch pipe 19 is provided with a sludge suction port at its bottom end. All sludge discharge branch pipes 19 are connected to the sludge discharge main pipe 17, and the sludge discharge pump 18 is connected to the sludge discharge main pipe 17.

[0028] Specifically, such as Figure 3 As shown, each sludge discharge branch pipe 19 has a horizontal section 21 at its bottom. The horizontal section 21 is arranged in the front-to-back direction, and several sludge suction ports are equidistantly arranged on the horizontal section 21 in the horizontal direction.

[0029] This invention utilizes the pressure provided by the water pump to the sewage, which impacts the water impeller 71 and drives the agitator 73 to rotate and stir. This achieves uniform mixing of water and sludge in the reaction zone 42, improves tank capacity utilization, fully utilizes the energy of the water pump, and avoids energy waste. By using turbine agitation instead of hydraulic agitation of the returned sewage, the problem of high sludge concentration in the system causing blockage of the return pipe and preventing agitation is solved, thus avoiding damage to the water pump caused by pump stalling due to blockage of the return pipe is avoided. The sewage in the clear water tank 3 is returned to the guide zone 41 of each ABR reaction chamber 4, where it is uniformly mixed with the influent, reducing the concentration of pollutants in the influent, improving the system's shock resistance, and reducing dead zones in the chambers.

[0030] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above-described embodiment. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

Claims

1. An enhanced stirred ABR reactor, characterized in that, include: Equalization tank (1); A booster pump (2) is installed inside the regulating tank (1); The ABR reactor body includes a clear water tank (3) and at least three ABR reaction chambers (4). Each ABR reaction chamber (4) is provided with a vertically arranged guide plate (5). The guide plate (5) divides the ABR reaction chamber (4) into a guide zone (41) and a reaction zone (42). A channel is formed between the bottom end of the guide plate (5) and the bottom end of the ABR reaction chamber (4) to connect the guide zone (41) and the reaction zone (42). Each reaction zone (42) is provided with packing material (6) and a stirring assembly (7). The clear water tank (3) is connected to the reaction zone (42). The inlet pipe (8) connects the booster pump (2) and the first guide zone (41).

2. The enhanced stirred ABR reactor according to claim 1, characterized in that, The ABR reactor body is provided with several partitions (9) spaced apart along the water inlet direction. The partitions (9) divide the ABR reactor body into several ABR reaction chambers (4) and a clear water tank (3) along the water inlet direction. The water inlet pipe (8) is connected to the upper part of the guide zone (41) of the first ABR reaction chamber (4). Each partition (9) is provided with a first water passage hole (10) on the upper part. The first water passage hole (10) makes the reaction zone (42) connected to the guide zone (41) of the adjacent ABR reaction chamber (4) or the reaction zone (42) of the end ABR reaction chamber (4) connected to the clear water tank (3). The packing (6) is provided between the guide plate (5) and the partition (9).

3. The enhanced stirred ABR reactor according to claim 1 or 2, characterized in that, The clear water tank (3) is equipped with a reflux pump (11), the reflux pump (11) is connected to a reflux main pipe (12), the reflux main pipe (12) is connected to at least three reflux branch pipes (13) corresponding one-to-one with the ABR reaction chamber (4), each reflux branch pipe (13) is connected in series with a reflux control valve (14), each ABR reaction chamber (4) is equipped with a reflux channel (15) at the top, the reflux branch pipe (13) is connected to the reflux channel (15), and the reflux channel (15) is connected to the flow guide area (41).

4. The enhanced stirred ABR reactor according to claim 3, characterized in that, The return channel (15) is located in the reaction zone (42). One end of the return channel (15) is connected to the guide plate (5), and the other end of the return channel (15) is connected to the side wall of the ABR reaction chamber (4). The guide plate (5) is provided with a second water passage (16) for connecting the guide zone (41) and the return channel (15).

5. The enhanced stirred ABR reactor according to claim 3, characterized in that, The stirring assembly (7) includes a water pump (71), a guide rod (72) and a stirrer (73). The water pump (71) is rotatably disposed in the return channel (15). The upper end of the guide rod (72) is connected to the water pump (71), and the lower end of the guide rod (72) is connected to the stirrer (73).

6. The enhanced stirred ABR reactor according to claim 5, characterized in that, The agitator (73) is a turbine agitator.

7. The enhanced stirred ABR reactor according to claim 1 or 2, characterized in that, It also includes a sludge discharge main pipe (17), a sludge discharge pump (18) and at least three sludge discharge branch pipes (19). Each of the reaction zones (42) is provided with one of the sludge discharge branch pipes (19). Each of the sludge discharge branch pipes (19) is connected in series with a sludge discharge control valve (20). Each of the sludge discharge branch pipes (19) is provided with a sludge suction port at the bottom end. All the sludge discharge branch pipes (19) are connected to the sludge discharge main pipe (17). The sludge discharge pump (18) is connected to the sludge discharge main pipe (17).

8. The enhanced stirred ABR reactor according to claim 7, characterized in that, Each of the sludge discharge branch pipes (19) has a horizontal section (21) at its bottom end, and a number of sludge suction ports are provided at equal intervals along the horizontal direction on the horizontal section (21).

9. The enhanced stirred ABR reactor according to claim 1, characterized in that, The clear water tank (3) is connected to a water outlet pipe (22).

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