Three-dimensional internal circulation energy-saving integrated MBR membrane sewage treatment device and method

Abstract

The application provides a three-dimensional internal circulation energy-saving integrated MBR membrane sewage treatment device and method, which comprises an anaerobic reaction chamber, an anoxic reaction chamber, an equipment chamber and a reflux pipe. The anaerobic reaction chamber is fixedly connected to the left side of the anoxic reaction chamber, and the equipment chamber is fixedly connected to the right side of the anoxic reaction chamber. A water guide pipe is in conductive connection between the bottom of the anaerobic reaction chamber and the anoxic reaction chamber. An inlet pipe extending into the anaerobic reaction chamber is in penetrating connection with the left side of the bottom of the anaerobic reaction chamber. An anaerobic reaction device is rotatably connected to the inlet pipe in the anaerobic reaction chamber. The anaerobic device and the anaerobic reaction chamber are in sealed connection. The anoxic reaction chamber is provided with an anoxic reaction device and an MBR assembly. The application provides a three-dimensional internal circulation energy-saving integrated MBR membrane sewage treatment device and method to solve the problems of low water quality, large area, high construction and operation cost and difficulty in meeting the current high standard demand.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment, and in particular to a three-dimensional internal circulation energy-saving integrated MBR membrane wastewater treatment device and method. Background Technology

[0002] With the increasing efforts in comprehensive national water environment management, the discharge standards for treated wastewater are gradually being raised, and the resource utilization of treated wastewater has been put on the agenda. Energy conservation, emission reduction, energy consumption reduction, process optimization, and water quality improvement are all urgent tasks. Traditional wastewater treatment processes such as AAO, SBR, MBR, fluidized bed, and oxidation ditch processes have low effluent quality, require large land areas, and have high investment and operating costs, making it difficult to meet the current high standards. Therefore, various improved technologies have emerged. Summary of the Invention

[0003] To address the aforementioned technical problems, this invention provides a three-dimensional internal circulation energy-saving integrated MBR membrane wastewater treatment device and method, which solves the problems of low effluent quality, large footprint, high investment and operating costs, making it difficult to meet current high standards.

[0004] The purpose and efficacy of this invention, a three-dimensional internal circulation energy-saving integrated MBR membrane wastewater treatment device and method, are achieved by the following specific technical means: A three-dimensional internal circulation energy-saving integrated MBR membrane wastewater treatment device and method includes an anaerobic reaction chamber, an anoxic reaction chamber, an equipment room, and a return pipe. The anaerobic reaction chamber is fixedly connected to the left side of the anoxic reaction chamber, and the equipment room is fixedly connected to the right side of the anoxic reaction chamber. A water inlet pipe is conductively connected between the bottom of the anaerobic reaction chamber and the anoxic reaction chamber. An inlet pipe extending into the interior of the anaerobic reaction chamber is connected through the left side of the bottom of the anaerobic reaction chamber. An anaerobic reaction device is rotatably connected to the inlet pipe inside the anaerobic reaction chamber, and the anaerobic device is sealed to the interior of the anaerobic reaction chamber. The anoxic reaction chamber contains an anoxic reaction device and an MBR assembly.

[0005] The anaerobic reactor includes a shell and a snap-fit ​​plate. The shell is vertically continuous, and the snap-fit ​​plate is fixedly connected to the upper and lower ends of the shell. The snap-fit ​​plate is embedded in the inner wall of the anaerobic reaction chamber. The water inlet pipe passes through the center of the anaerobic reactor and is rotatably connected to the water inlet pipe.

[0006] The snap-fit ​​plate at the top of the housing has a through hole running vertically through it, and a drive fan for water flow is fixedly connected in the through hole. A ring-shaped partition is fixedly connected to the snap-fit ​​plate at the bottom of the housing, and a water guide plate is fixedly connected to the top of the partition and to the bottom of the snap-fit ​​plate at the top of the housing. At the same time, the interior of the housing forms three independent hollow cavities through the water guide plate and the partition. A filter screen is provided on the wall of the partition. The water guide plate is funnel-shaped, and a filter screen is provided in the bottom horizontal section of the wall of the water guide plate.

[0007] The hollow cavity at the bottom inner side of the shell is filled with replaceable anaerobic packing material, and a support plate for sealing the anaerobic packing material is movably connected inside the snap-fit ​​plate at the bottom inner side of the shell. A water outlet hole penetrating the hollow cavity is provided on the snap-fit ​​plate at the bottom of the hollow cavity of the shell.

[0008] The anoxic reaction chamber has a maintenance port fixedly connected to the center of its top, extending into the chamber. A pressure relief port is fixedly connected to one side of the top of the chamber. An installation plate is fixedly connected to the center of the interior of the chamber, and the MBR assembly is fixedly connected to the top of the installation plate. The anoxic reaction device is fixedly connected to the bottom of the installation plate. A filter screen is fixedly connected to the bottom of the chamber, forming a filtration chamber between the bottom of the filter screen and the bottom of the chamber. A pneumatic stirring device is fixedly connected to the filtration chamber, and the left side of the filtration chamber is connected to a water pipe. A return pipe runs through the left side wall of the top of the anoxic reaction chamber, with one end extending into the filtration chamber and the other end extending outside the chamber. A return water pipe extending to the top of the anaerobic reaction chamber is connected to the return water pipe outside the chamber, and a mud-water separation device is fixedly connected at the connection between the return water pipe and the return pipe.

[0009] The anoxic reaction device is a hollow cone-shaped device, and the bottom of the anoxic reaction device is fixedly connected to the inner wall of the anoxic reaction chamber to form a closed loop. At the same time, a filter port is opened on the top of the side wall of the anoxic reaction device, and a filter port is opened on the inner wall of the bottom of the anoxic reaction device. The anoxic reaction device is filled with replaceable anoxic packing material.

[0010] The MBR assembly includes a base, an MBR membrane, and a cover plate. The base is fixedly connected to the top of the mounting plate, and the MBR membrane is rotatably connected to the inside of the base. The cover plate is fixedly connected to the top of the MBR membrane. The base has a hollow cavity with a through top, and a connecting groove is formed on the side wall of the hollow cavity. The MBR membrane is water-permeable, and a connecting ring is fixedly connected to the bottom of the MBR membrane. The connecting ring is rotatably connected to the inside of the connecting groove. A vertical water inlet plate with a certain angle is fixedly connected to the outside of the MBR membrane.

[0011] The cover plate has an air inlet at the center of its top, and an internal air passage that communicates with the air inlet is formed in the body of the cover plate. The internal air passage is arc-shaped, and a nozzle that communicates with the internal air passage is embedded in the side wall of the cover plate.

[0012] The equipment room is equipped with a water collection tank, an aeration blower, and a reagent tank, which are fixedly connected from the inside to the outside at the bottom. The top of the water collection tank is connected to a water inlet pipe that is connected to the bottom of the MBR component, and the bottom of the water collection tank is connected to a drain pipe that extends to the outside of the equipment room. The top of the aeration blower is connected to an air inflation pipe that extends to the inside of the anoxic reaction chamber, and the air inflation pipe is connected to the MBR membrane and the pneumatic stirring device. The reagent tank stores reagents for purifying wastewater, and the top of the reagent tank is equipped with a pipe that is connected to the air inflation pipe.

[0013] The method is as follows:

[0014] S1: First, the wastewater is introduced into the top of the anaerobic reaction chamber through the inlet pipe, so that the wastewater passes through the anaerobic reaction device from top to bottom. At the same time, the anaerobic reaction device rotates as a whole, so that the wastewater is filtered through the anoxic packing and then thrown into the outside of the anaerobic reaction device by centrifugal force and discharged to the bottom of the anaerobic reaction chamber. Finally, it enters the bottom of the anoxic reaction chamber through the water guide pipe.

[0015] S2: The wastewater treated by the anaerobic reactor will enter the filter chamber at the bottom of the anoxic reaction chamber. The wastewater will be stirred by the pneumatic stirring device and the impurities in the wastewater will be filtered out by the filter plate at the top. The impurities will be discharged through the return pipe, and the water in the impurities will be returned to the anaerobic reaction chamber through the return water pipe for secondary circulation and purification.

[0016] S3: As the water supply inside the anoxic reaction chamber increases, the water level rises and enters the anoxic reaction device for treatment by the anoxic packing material. Subsequently, the water level continues to rise and submerges the MBR components.

[0017] S5: The aeration blower provides air pressure to the interior of the anoxic reaction chamber and introduces the reagents from the reagent tank into the top of the MBR component and into the wastewater.

[0018] S4: Air is supplied to the top of the MBR module by the aeration blower, which causes the cover plate to rotate under the action of the built-in air channel. At this time, the water inlet plate guides the sewage to the MBR membrane, so that the MBR membrane purifies the sewage and introduces it into the MBR module. Finally, the purified water will enter the clear water collection tank through the water inlet pipe and be discharged.

[0019] Beneficial effects:

[0020] (1) By building anaerobic reaction room, anoxic reaction room and equipment room together, an integrated equipment is formed, which is distributed in three dimensions, has a compact structure, saves space, occupies a small area, and is convenient and quick to install.

[0021] (2) By adopting a bottom water inlet, central cylinder upflow guide, top water outlet overflow for uniform water distribution, and bottom sedimentation water outlet without siltation in the anaerobic reaction chamber, the inlet water and mixed liquor return water are fully mixed to form a system circulation, thereby improving the removal effect of pollutants.

[0022] (3) By using the air purging of the MBR module as the aeration power of the aerobic zone, the high dissolved oxygen in the MBR membrane zone is fully utilized, saving the source of aeration and oxygenation in the aerobic zone, and achieving an energy saving effect of 30%. Attached Figure Description

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

[0024] Figure 2 This is a schematic diagram of the overall cross-sectional structure of the present invention.

[0025] Figure 3 This is a schematic diagram of the anaerobic reaction device of the present invention.

[0026] Figure 4 This is a schematic cross-sectional view of the anaerobic reactor of the present invention.

[0027] Figure 5 This is a schematic diagram of the MBR component structure of the present invention.

[0028] Figure 6 This is a schematic diagram of the disassembled structure of the MBR component of the present invention.

[0029] Figure 7 This is a schematic cross-sectional view of the MBR component of the present invention.

[0030] Figure 8 This is a top view cross-sectional structural diagram of the cover plate of the present invention.

[0031] Figure 9 This is a side view cross-sectional structural diagram of the cover plate of the present invention.

[0032] Figure 1-9 In the diagram, the correspondence between component names and drawing numbers is as follows:

[0033] 1-Anaerobic reaction chamber, 101-Inlet pipe, 102-Water guide pipe, 103-Anaerobic reaction device, 104-Shell, 105-Snap-fit ​​plate, 106-Drive fan, 107-Water guide plate, 108-Baffle plate, 109-Anaerobic packing, 110-Water outlet, 111-Support plate, 2-Anoxic reaction chamber, 201-Inspection port, 202-Pressure relief port, 203-Anoxic reaction device, 204-Filter screen, 205-Anoxic packing, 206-Filter plate, 207-Pneumatic stirring device, 2 08-Mounting plate, 209-MBR module, 210-Water baffle, 211-Base, 212-MBR membrane, 213-Water inlet plate, 214-Cover plate, 215-Connecting groove, 216-Connecting ring, 217-Nozzle, 218-Built-in air duct, 219-Air supply hole, 3-Equipment room, 301-Drainage pipe, 302-Reagent tank, 303-Aeration blower, 304-Clear water collection tank, 305-Water inlet pipe, 306-Air inflation pipe, 4-Return pipe, 401-Return water pipe. Detailed Implementation

[0034] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0035] Example 1:

[0036] As attached Figure 1 To be continued Figure 4 As shown:

[0037] First, wastewater is introduced into the top of the anaerobic reaction chamber 1 through the inlet pipe 101. At this time, the wastewater will pass through the anaerobic reaction device 103 from top to bottom. The drive fan 106 in the top snap-fit ​​plate 105 of the shell 104 drives the anaerobic reaction device 103 to rotate as a whole. At the same time, the wastewater will enter the interior of the anaerobic reaction device 103. Under the action of the guide plate 107, the wastewater enters the hollow cavity inside the shell 104 and is treated by the anaerobic packing 109. Finally, under the action of centrifugal force generated by the rotation of the anaerobic reaction device 103, the wastewater is filtered through the baffle 108 and discharged from the anaerobic reaction device 103 through the outlet hole 110 and enters the bottom of the anaerobic reaction chamber 1, completing the anaerobic treatment of the wastewater. The wastewater is then transferred to the bottom of the anoxic reaction chamber 2 through the guide pipe 102.

[0038] Example 2:

[0039] As attached Figure 2 As shown:

[0040] When the wastewater enters the bottom of the anoxic reaction chamber 2, the aeration blower 303 in the equipment room 3 will operate to supply air to the air supply pipe 306. At this time, the treatment agent in the reagent tank 302 will enter along with the air supply pipe 306. Thus, the air supply pipe 306 provides gas to the MBR component 209 and the pneumatic agitator 207 while introducing the agent into the MBR component 209 and the pneumatic agitator 207. This allows the pneumatic agitator 207 to agitate the wastewater at the bottom of the anoxic reaction chamber 2 and perform chemical treatment. At the same time, as the water level rises, the wastewater will enter the upper part of the anoxic treatment chamber 2 through the filter plate 206, while the impurities in the wastewater will be guided out of the anoxic reaction chamber 2 through the return pipe 4. When passing the top of the anaerobic reaction chamber 1, the water will re-enter the anaerobic reaction chamber 1 through the return water pipe 401 and the mud-water separation equipment for treatment, while the impurities will be discharged through the return pipe 4.

[0041] Example 3:

[0042] As attached Figure 2 As shown:

[0043] When the sewage level at the bottom of the anoxic reaction chamber 2 rises, the sewage will flow from bottom to top through the anoxic reaction device 203. The sewage enters the anoxic reaction device 203 through the filter screen 204 at the bottom of the device and is treated by the anoxic packing material 205. The treated sewage will be discharged through the filter port at the top of the side wall of the anoxic reaction device 203 and continue to move towards the top of the anoxic reaction chamber 2.

[0044] Example 4:

[0045] As attached Figure 5 To be continued Figure 9 As shown:

[0046] When the wastewater level rises to the upper section of the anoxic reaction chamber 2, the cover plate 214 on top of the MBR module 209 receives airflow through the air inlet pipe 306. This airflow enters the built-in air channel 218 inside the cover plate 214 and is sprayed out through the nozzle 217 at the end of the built-in air channel 218, thereby treating the wastewater again. The arc-shaped built-in air channel 218 drives the MBR membrane 212 to rotate as a whole. At the same time, when the MBR membrane 212 rotates, the water guide plate 213 guides the wastewater into the MBR membrane 212, allowing the wastewater to enter the MBR membrane 212 for treatment and then be introduced into the base 211. As more wastewater is introduced, the internal pressure of the MBR module 209 increases, causing the wastewater to be guided through the water inlet pipe 305 into the clear water collection tank 304 and then out of the present invention through the drain pipe 301.

[0047] Working principle: First, sewage is introduced into the top of the anaerobic reaction chamber 1 through the inlet pipe 101, so that the sewage passes through the anaerobic reaction device 103 from top to bottom. The water flow drives the anaerobic reaction device 103 to rotate as a whole, and the anaerobic packing material 109 inside treats the sewage. After treatment, under the action of centrifugal force, the treated sewage is thrown to the outside of the anaerobic reaction device 103 and discharged through the outlet hole 110 to the bottom of the anaerobic reaction chamber 1. Then, it enters the bottom of the anoxic reaction chamber 2 through the water guide pipe 202.

[0048] When the wastewater enters the bottom of the anoxic reaction chamber 2, the aeration blower 303 is turned on to supply air to the pneumatic stirring device 207 and the MBR component 209. At the same time, the chemicals in the chemical tank 302 are discharged with the airflow, so that the wastewater at the bottom of the anoxic reaction chamber 2 is stirred by the airflow and the chemicals are mixed with the wastewater. Finally, the wastewater enters the anoxic reaction chamber 2 from bottom to top through the filter plate 206. Impurities are discharged through the return pipe 4, and the water is returned to the anaerobic reaction chamber 1 for treatment by the return water pipe 401 and the mud-water separation equipment.

[0049] When the sewage level at the bottom of the anoxic reaction chamber 2 rises, the sewage will flow from bottom to top through the anoxic reaction device 203. The sewage enters the anoxic reaction device 203 through the filter screen 204 at the bottom of the device and is treated by the anoxic packing material 205. The treated sewage will be discharged through the filter port at the top of the side wall of the anoxic reaction device 203 and continue to move towards the top of the anoxic reaction chamber 2.

[0050] When the sewage level exceeds the MBR module 209, the cover plate 214 at the top of the MBR module 209 rotates under the influence of airflow through its internal arc-shaped built-in air passage 218 and nozzle 217, causing the MBR membrane 212 to rotate as well. As the MBR membrane 212 rotates, the sewage is guided into the MBR membrane 212 by the water guide plate 213, allowing the sewage to enter the MBR membrane 212 for treatment and then be introduced into the base 211. As the amount of sewage introduced increases, the internal pressure of the MBR module 209 increases, causing the sewage to be guided into the clear water collection tank 304 through the water guide pipe 305 and then out of the present invention through the drain pipe 301.

Claims

1. A three-dimensional internal circulation energy-saving integrated MBR membrane wastewater treatment device, comprising an anaerobic reaction chamber (1), an anoxic reaction chamber (2), an equipment room (3), and a return pipe (4), wherein the anaerobic reaction chamber (1) is located to the left of the anoxic reaction chamber (2), and the equipment room (3) is located to the right of the anoxic reaction chamber (2), wherein an inlet pipe (101) for conveying wastewater is provided on the outer side of the bottom of the anaerobic reaction chamber (1), and a pipeline is connected between the anaerobic reaction chamber (1) and the anoxic reaction chamber (2), characterized in that: The anaerobic reaction chamber (1) is equipped with an anaerobic reaction device (103). The anaerobic reaction device (103) includes a shell (104). The hollow cavity at the bottom inside the shell (104) is equipped with anaerobic packing material (109). The anoxic reaction chamber (2) is equipped with an anoxic reaction device (203) and an MBR component (209). The anoxic reaction chamber (2) is provided with a mounting plate (208) at its center, and the MBR component (209) is located on the top of the mounting plate (208). At the same time, the anoxic reaction device (203) is located at the bottom of the mounting plate (208). The bottom of the anoxic reaction chamber (2) is provided with a filter screen (204), and a filter chamber is formed between the bottom of the filter screen (204) and the bottom of the anoxic reaction chamber (2). At the same time, a pneumatic stirring device (207) is provided in the filter chamber, and a return pipe (4) is vertically arranged in the filter chamber, passing through the top of the anaerobic reaction chamber (1). The hypoxia reaction device (203) is a hollow cone-shaped device, and the bottom of the hypoxia reaction device (203) is fixedly connected to the inner wall of the hypoxia reaction chamber (2) to form a closed loop. At the same time, the top side wall of the hypoxia reaction device (203) is provided with a filter port, and the hypoxia reaction device (203) is provided with hypoxia packing material (205). The MBR module (209) includes a base (211), an MBR membrane (212), and a cover plate (214). The base (211) is located on the top of the mounting plate (208), and the MBR membrane (212) is rotatably connected to the inside of the base (211). Meanwhile, the cover plate (214) is located on the top of the MBR membrane (212). The MBR membrane (212) is permeable, and the bottom of the MBR membrane (212) is provided with a connecting ring (216) that engages with the base (211). At the same time, a water-guiding plate (213) is provided on the outside of the MBR membrane (212). The cover plate (214) has an air inlet (219) at the top center, and an internal air passage (218) communicating with the air inlet (219) is provided in the body of the cover plate (214). The internal air passage (218) is arc-shaped, and a nozzle (217) communicating with the internal air passage (218) is embedded on the side wall of the cover plate (214). The equipment room (3) is equipped with a water collection tank (304), an aeration blower (303), and a reagent tank (302) from the inside to the outside. The top of the water collection tank (304) is provided with a water inlet pipe (305) that is connected to the bottom of the MBR component (209). The top of the aeration blower (303) is connected to an air filling pipe (306) that extends into the anoxic reaction chamber (2). The air filling pipe (306) is connected to the MBR membrane (212) and the pneumatic stirring device (207). At the same time, the top of the reagent tank (302) is provided with a pipe that is connected to the air filling pipe (306).

2. The three-dimensional internal circulation energy-saving integrated MBR membrane wastewater treatment device according to claim 1, characterized in that: The anaerobic reaction device (103) includes a shell (104) and a snap-fit ​​plate (105). The snap-fit ​​plate (105) is located at the upper and lower ends of the shell (104), and the interior of the shell (104) is arranged vertically. Meanwhile, the water inlet pipe (101) passes through the center of the shell (104).

3. The three-dimensional internal circulation energy-saving integrated MBR membrane wastewater treatment device according to claim 2, characterized in that: The snap-fit ​​plate (105) at the top of the housing (104) has an inwardly through hole and a driving structure inside the through hole. The snap-fit ​​plate (105) at the bottom of the housing (104) has a partition structure with a filter screen at the top, which divides the interior of the housing (104) into three hollow cavities.

4. The three-dimensional internal circulation energy-saving integrated MBR membrane wastewater treatment device according to claim 3, characterized in that: The anaerobic packing (109) has a detachable support plate (111) on the snap-fit ​​plate (105) at the bottom, and the snap-fit ​​plate (105) at the bottom of the hollow cavity of the inner bottom shell of the body (104) has a water outlet hole (110) that penetrates the hollow cavity.

5. A method for treating wastewater using the integrated MBR membrane wastewater treatment device with three-dimensional internal circulation energy saving as described in claim 1, comprising the following steps: S1: First, the sewage is introduced into the top of the anaerobic reaction chamber (1) through the inlet pipe (101), so that the sewage passes through the anaerobic reaction device (103) from top to bottom. At the same time, the anaerobic reaction device (103) rotates as a whole, so that the sewage passes through the anoxic packing material (205) for filtration and is then thrown into the outside of the anaerobic reaction device (103) by centrifugal force and discharged to the bottom of the anaerobic reaction chamber (1). Finally, it enters the bottom of the anoxic reaction chamber (2) through the water guide pipe (102). S2: The wastewater treated by the anaerobic reactor (103) will enter the filter chamber at the bottom of the anoxic reaction chamber (2). The wastewater will be stirred by the pneumatic stirring device (207), and the impurities in the wastewater will be filtered out by the filter plate (206) at the top. The impurities will be discharged through the return pipe (4), and the water in the impurities will be re-entered into the anaerobic reaction chamber (1) through the return water pipe (401) for secondary circulation and purification. S3: As the water source inside the anoxic reaction chamber (2) increases, the water level rises and enters the anoxic reaction device (203) for treatment by the anoxic packing material (205). Subsequently, the water level continues to rise and submerges the MBR component (209). S5: The aeration blower (303) provides air pressure to the interior of the anoxic reaction chamber (2), and the reagents in the reagent tank (302) are introduced into the top of the MBR component (209) and into the wastewater; S4: The aeration blower (303) supplies air to the top of the MBR module (209), which causes the cover plate (214) to rotate under the action of the built-in air channel (218). At this time, the water guide plate (213) guides the sewage to the MBR membrane (212), so that the MBR membrane (212) purifies the sewage and introduces it into the MBR module (209). Finally, the purified water will enter the water collection tank (304) through the water pipe (305) and be discharged.

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