Intelligent membrane separation device for efficient anaerobic biological treatment

Abstract

The utility model discloses an intelligent membrane separation device for efficient anaerobic biological treatment, which comprises a device main body, the device main body is divided into a reaction filter chamber and a membrane separation chamber by a baffle, an anaerobic reaction cavity of the reaction filter chamber is connected with a water inlet pipe, a filter assembly is arranged in the reaction filter chamber, and a membrane assembly of the membrane separation chamber is connected with a water outlet pipe. The device main body is connected with a gas recycling assembly through an exhaust pipe and a gas distribution pipe, the gas distribution pipe is connected with an aeration assembly in the membrane separation chamber, and an oxidation-reduction potential detection electrode is arranged in the reaction filtration chamber. According to the utility model, sewage is filtered through the filter assembly and the membrane assembly, sludge is more effectively intercepted, the membrane surface is scoured by combining the aeration assembly, membrane pollution is effectively slowed down, meanwhile, continuous sewage treatment and utilization are realized by controlling each water valve, the sewage filtering speed is also accelerated, and in addition, the anaerobic reaction completion condition of the sewage oxidation-reduction potential reaction is monitored. The dynamic adjustment of the anaerobic reaction is realized.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to an intelligent membrane separation device for efficient anaerobic biological treatment. Background Technology

[0002] Anaerobic biological treatment is a biological treatment method that utilizes anaerobic microorganisms to degrade organic matter under anaerobic conditions. This method does not require the supply of oxygen; through the metabolic action of anaerobic and facultative bacteria, large organic molecules are converted into smaller compounds, ultimately producing gases such as methane and carbon dioxide, while generating a small amount of sludge. Anaerobic biological treatment is particularly suitable for treating high-concentration organic wastewater and sludge, and has advantages such as low energy consumption and the ability to produce methane as a clean energy source.

[0003] Anaerobic membrane bioreactor (AnMBR) is a novel wastewater treatment process that organically combines anaerobic biological treatment units and membrane separation technology. It not only retains many advantages of anaerobic technology, but the introduction of membrane modules can completely retain microorganisms, thus achieving effective separation of sludge retention time (SRT) and heat recovery time (HRT). As a result, AnMBR reactors possess advantages such as high sludge concentration, long sludge age, and strong resistance to shock loads, demonstrating excellent application prospects in the treatment of high-concentration and complex organic wastewater.

[0004] However, current anaerobic membrane bioreactors (AnMBRs) have unstable anaerobic reaction systems that rely solely on operator experience for control. Typically, wastewater flows upwards through a sludge bed containing granular or flocculent sludge, with biogas generated under anaerobic conditions circulating internally. The treatment process generally involves only one filtration, resulting in low wastewater treatment efficiency. Furthermore, the long treatment time contributes to this low efficiency. Additionally, the sludge formed in an anaerobic environment is highly viscous, making membrane fouling more likely. Membrane fouling increases the operating costs of AnMBRs, hindering their application. Utility Model Content

[0005] The purpose of this invention is to provide an intelligent membrane separation device for efficient anaerobic biological treatment, so as to solve the problems existing in the above-mentioned background technology.

[0006] To achieve the above objectives, this utility model provides an intelligent membrane separation device for efficient anaerobic biological treatment, comprising a device body, a gas collection and sealing cover, and a gas recovery and utilization component. The gas collection and sealing cover is located on the top of the device body, and the gas recovery and utilization component is located on one side of the device body. Support legs are welded to the lower end of the device body, and control components, inspection doors, sludge discharge doors, and observation windows are also provided on the front surface of the device body.

[0007] The main body of the device is equipped with a baffle in the middle, which divides the main body of the device into a reaction filtration chamber and a membrane separation chamber, and the upper parts of the reaction filtration chamber and the membrane separation chamber are connected. A water inlet is opened on one side of the reaction filtration chamber, and a water inlet pipe for conveying sewage is provided on the water inlet. A water inlet valve is provided on the water inlet. A water distribution component connected to the water inlet is provided in the reaction filtration chamber. A filter component for sewage filtration is provided above the water distribution component in the reaction filtration chamber. An anaerobic reaction chamber for anaerobic biological reaction of sewage is provided between the water distribution component and the filter component in the reaction filtration chamber. A sludge discharge port and an inspection port are opened on the front side of the bottom of the reaction filtration chamber. A sludge discharge door is installed on the sludge discharge port, and an inspection door is installed on the inspection port. A membrane component for membrane separation is provided in the membrane separation chamber. An observation port is opened on the front side of the membrane separation chamber, and an observation window is installed on the observation port.

[0008] The gas collection sealing cover is provided with an exhaust port, a detection port, and a water outlet. The exhaust port is connected to the gas recovery and utilization component. The detection port is used to fix and install the oxidation-reduction potential detection electrode. The water outlet is provided with a water outlet pipe for the water purified by membrane separation to flow out. The water outlet pipe is connected to the water outlet of the membrane component. The water outlet pipe is provided with a water outlet valve. A water distribution port is provided on the water outlet pipe in front of the water outlet valve. The water distribution port is connected to the water inlet pipe through a return water pipe, and a return water valve is provided on the return water pipe.

[0009] The gas recovery and utilization component includes an exhaust pipe, a biogas storage tank, a gas return pipe, and a biogas circulation pump. One end of the exhaust pipe is sealed to a gas collection sealing cover, and the other end is connected to the biogas storage tank installed on the exhaust pipe. One end of the gas return pipe is connected to the biogas storage tank, and the other end is connected to a gas distribution pipe installed at the bottom of the membrane separation chamber of the main body of the device. The biogas stored in the biogas storage tank is returned to the membrane separation chamber of the main body of the device. The biogas circulation pump is installed on the gas return pipe to pressurize the biogas returning to the main body of the device, so that the returned biogas has a certain pressure.

[0010] The control component includes a control motherboard, control buttons, and a touch screen. The output of the control motherboard is electrically connected to the touch screen, the inlet valve, the outlet valve, the return valve, the biogas circulation pump, and the gas valves on each pipeline of the gas recovery and utilization component. The input of the control motherboard is electrically connected to the touch screen, the control buttons, and the oxidation-reduction potential detection electrode.

[0011] Preferably, the gas collecting sealing cover is conical or inverted funnel-shaped, and the shape and size of its bottom match the shape and size of the top of the device body.

[0012] Preferably, the bottom of the baffle is fixedly installed on the bottom of the main body of the device, and the bottom of the baffle has several elongated sludge return ports for returning the sludge settled in the membrane separation chamber to the reaction filtration chamber.

[0013] Preferably, the water distribution assembly includes a main water pipe, a branch water pipe, and a water outlet. The main water pipe is connected to the inlet water pipe, and branch water pipes are evenly connected to both ends of the main water pipe. Water outlets are evenly opened at the upper end of the branch water pipes.

[0014] Preferably, the filtration assembly includes a lower screen plate located directly above the water distribution assembly, an upper screen plate connected above the lower screen plate, filter media filling the space between the upper and lower screen plates, a riser pipe extending through the upper end of the upper screen plate, and a sludge hood connected to the lower end of the riser pipe below the lower screen plate. An inclined plate is connected to the upper side of the sludge hood relative to the inner wall of the main body of the device and the baffle.

[0015] Preferably, an oxidation-reduction potential detection electrode is provided at the upper part of the reaction filtration chamber, wherein the oxidation-reduction potential detection electrode extends from the detection port of the gas collection sealing cover into the upper part of the reaction filtration chamber to measure the temperature and oxidation-reduction potential of the water flowing from the upper part of the reaction filtration chamber to the upper part of the membrane separation chamber.

[0016] Preferably, the membrane separation chamber is equipped with a sludge return plate and an aeration assembly. The sludge return plate is located below the membrane assembly and is inclined. Its bottom is fixedly installed at the bottom of the main body of the device and is fixed together with the side of the baffle facing the membrane separation chamber. Its upper end is higher than its bottom and is inclined towards the reaction filtration chamber. The aeration assembly is located directly below the membrane assembly. The aeration assembly includes multiple aeration pipes corresponding to the membrane assembly. The bottom of the aeration pipe is connected to the air distribution pipe, and the top end of the aeration pipe is connected to an aeration head. The aeration head is located directly below the membrane assembly, and the gas generated by the aeration head washes over the membrane assembly.

[0017] Preferably, the gas distribution pipe is located below the sludge return plate. The gas distribution pipe is T-shaped, and its tail end is connected to the biogas return pipe located outside the main body of the device, while its end is fixedly connected to multiple aeration pipes.

[0018] Preferably, the sludge return plate is a semi-circular flat plate with multiple through holes at positions corresponding to the membrane module. The aeration pipe passes through the through holes from the bottom of the sludge return plate upwards, extends into the membrane separation chamber, and extends to the bottom of the membrane module.

[0019] Preferably, the inlet pipe and the outlet pipe are respectively equipped with an inlet pump and an outlet pump, the exhaust pipe is equipped with a first gas valve between the exhaust port and the biogas storage tank, the gas return pipe is equipped with a second gas valve between the biogas circulation pump and the biogas storage tank, and the inlet pump, the outlet pump, the first gas valve and the second gas valve are all electrically connected to the output terminal of the control main board.

[0020] Compared with the prior art, the beneficial effects of this utility model are:

[0021] (1) This utility model, through the arrangement of a sludge hood, inclined plate, lower screen plate, filter media, upper screen plate, and membrane module, allows the inclined plate and sludge hood to effectively block the diffused wastewater, preventing air bubbles from enveloping and rising the sludge for preliminary filtration. The lower screen plate, filter media, and upper screen plate provide secondary filtration of the wastewater, and the membrane module performs the final filtration, separating the mud and water. This significantly reduces treatment time and more effectively intercepts sludge. Simultaneously, by electrically connecting the output terminal of the control main board to the inlet valve, outlet valve, and return valve, continuous wastewater treatment can be achieved within the main body of the device, while also allowing for the processing of... The wastewater is then returned to the main body of the device to accelerate the filtration process and ensure that the flow rate of the wastewater within the main body is not slowed down by the filter media. At the same time, the water distribution component diffuses a large amount of wastewater into the anaerobic reaction chamber, allowing it to mix thoroughly with the microorganisms. The organic matter in the wastewater can be fully degraded by the microorganisms, increasing the biodegradation rate. In addition, most of the sludge in the wastewater after secondary filtration is intercepted, making the sludge concentration in the membrane separation chamber much lower than that in the reaction filtration chamber. The low sludge concentration in the membrane separation chamber effectively reduces the amount of sludge adsorbed on the surface of the membrane components, thus effectively mitigating membrane fouling.

[0022] (2) This utility model uses an oxidation-reduction potential detection electrode with a temperature probe to extend into the water body in the upper part of the reaction filtration chamber to monitor the oxidation-reduction potential of the water in the transition zone between the reaction filtration chamber and the membrane separation chamber. The oxidation-reduction potential of the water can directly reflect the anaerobic conditions in the transition zone between the reaction filtration chamber and the membrane separation chamber, and indirectly reflect the growth status of microorganisms in the transition zone between the reaction filtration chamber and the membrane separation chamber. The oxidation-reduction potential of the water is fed to the control board. The control board controls the residence time of sludge in the anaerobic reaction chamber according to its oxidation-reduction potential. That is, the flow rate of sewage entering the anaerobic reaction chamber through the water distribution component is adjusted by the inlet valve, outlet valve and return valve to realize the dynamic adjustment of anaerobic reaction conditions, improve the stability of anaerobic reaction, and reflect the sewage microbial degradation status in real time through the touch screen.

[0023] (3) This utility model provides an aeration component below the membrane module. The aeration head of the component washes the membrane surface, which helps to reduce membrane fouling. The gas continuously washes the membrane surface, and under the action of shear force, the sludge adsorbed on the membrane surface is desorbed, thus reducing membrane fouling. In addition, the aeration component uses biogas generated by the anaerobic reaction chamber, which reduces energy consumption.

[0024] (4) This invention utilizes an inclined sludge return plate positioned below the membrane module. This allows naturally settling sludge to return to the sludge return port under its own gravity, and then back into the reaction chamber. Simultaneously, the rising flow velocity of the wastewater in the reaction chamber carries the settled sludge from the sludge return port into the anaerobic reaction chamber, where it re-participates in the anaerobic reaction, preventing clogging of the sludge return port. Furthermore, the return of settled sludge from the membrane separation chamber is achieved through the sludge return port, eliminating the need for a dedicated sludge return pump. This sludge return process reduces energy consumption.

[0025] (5) By setting a separate membrane separation chamber in the main body of the device, the wastewater distribution is decoupled from the aeration pipe, aeration head and gas recovery and utilization component of the membrane washing assembly. The biogas circulation pump sets a suitable upward flow rate of the gas in the aeration head to obtain the best microbial growth conditions and reduce the impact of aeration on microbial growth conditions. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the structure of an intelligent membrane separation device for efficient anaerobic biological treatment according to the present invention.

[0028] Figure 2 This is a schematic diagram of the internal structure of an intelligent membrane separation device for efficient anaerobic biological treatment according to the present invention.

[0029] Figure 3 This is a schematic diagram of the structure of the water distribution pipe and aeration pipe at the bottom of the main body of the device of this utility model.

[0030] In the diagram: 1. Main body of the device; 2. Gas recovery and utilization component; 3. Exhaust pipe; 4. Biogas storage tank; 5. Gas return pipe; 6. Biogas circulation pump; 7. Filter assembly; 8. Lower screen plate; 9. Upper screen plate; 10. Filter media; 11. Ascend pipe; 12. Sludge cover; 13. Inclined plate; 14. Control assembly; 15. Main control board; 16. Control button; 17. Touch screen; 18. Aeration assembly; 19. Aeration pipe; 20. Aeration head; 10. Baffle; 10. Sludge return port; 11. Reaction and filtration chamber. Anaerobic reaction chamber 701, membrane separation chamber 8, water distribution assembly 9, main water pipe 901, branch water pipe 902, outlet 903, inspection door 10, sludge discharge door 11, observation window 12, inlet pipe 13, inlet valve 14, membrane assembly 15, outlet pipe 16, outlet valve 17, return water pipe 18, return water valve 19, air distribution pipe 20, oxidation-reduction potential detection electrode 21, sludge return plate 22, air collection sealing cover 23, inlet pump 24, outlet pump 25, first air valve 26, second air valve 27, support leg 28. Detailed Implementation

[0031] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0032] In the description of the embodiments of this utility model, it should be understood that if the embodiments of this utility model involve directional indications, such as up, down, left, right, front, back, inside, outside, etc., the orientation or positional relationship of the indications is based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the embodiments of this utility model and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0034] In this embodiment of the invention, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part of a structure. They can be mechanical or electrical connections. They can be direct connections or indirect connections through an intermediate medium, and can represent the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention based on the specific circumstances.

[0035] like Figures 1-3As shown, this utility model embodiment provides an intelligent membrane separation device for efficient anaerobic biological treatment, including a device body 1, a gas collecting and sealing cover 23, and a gas recovery and utilization component 2. The gas collecting and sealing cover 23 is located on the top of the device body 1, and the gas recovery and utilization component 2 is located on one side of the device body 1. A support leg 28 is welded to the lower end of the device body 1. The front surface of the device body 1 is also provided with a control component 4, an inspection door 10, a sludge discharge door 11, and an observation window 12. The control component 4 is used to control the operation of the device body 1, the inspection door 10 is used to open for inspection of the filter component 3 and replacement of the filter media 303 of the filter component 3, and the sludge discharge door 11 is used for opening... The device body 1 has an observation window 12 for observing the working status of the membrane module 15, which is opened to facilitate sludge replacement. A baffle 6 is provided in the middle of the main body 1, dividing the main body 1 into two equal and relatively independent reaction filtration chambers 7 and membrane separation chambers 8. The upper parts of the reaction filtration chambers 7 and membrane separation chambers 8 are connected. An inlet pipe is provided on one side of the reaction filtration chamber 7, and an inlet pipe 13 for conveying wastewater is provided on the inlet pipe. An inlet valve 14 is provided on the inlet pipe 13. A water distribution assembly 9 connected to the inlet pipe 13 is provided inside the reaction filtration chamber 7. A filter assembly 3 for wastewater filtration is provided above the water distribution assembly 9 inside the reaction filtration chamber 7. An anaerobic reaction chamber 701 for anaerobic biological reaction of wastewater is located between the water distribution component 9 and the filter component 3. A sludge discharge port and an inspection port are opened at the bottom front of the reaction filter chamber 7. A sludge discharge door 11 is installed on the sludge discharge port, and an inspection door 10 is installed on the inspection port. A membrane separation chamber 8 contains a membrane component 15 for membrane separation. An observation port with an observation window 12 is opened at the front of the membrane separation chamber 8. The gas collection sealing cover 23 is conical or inverted funnel-shaped, and its bottom shape and size match the top shape and size of the main body 1. The gas collection sealing cover 23 has an exhaust port, a detection port, and a water outlet. The exhaust port is equipped with... At the center of the top of the gas collection sealing cover 23, the exhaust port is sealed to the exhaust pipe 201 of the gas recovery and utilization component 2. The detection port and the water outlet are respectively located on both sides of the central axial surface of the gas collection sealing cover 23. The detection port is used to fix and install the oxidation-reduction potential detection electrode 21 with temperature probe. The water outlet is provided with a water outlet pipe 16 for the water to flow out after membrane separation and purification. The water outlet pipe 16 is connected to the water outlet 903 of the membrane component 15. The water outlet pipe 16 is provided with a water outlet valve 17. A water distribution port is opened on the water outlet pipe 16 in front of the water outlet valve 17. The water distribution port is connected to the water inlet pipe 13 through the water return pipe 18, and a water return valve 19 is provided on the water return pipe 18.The gas recovery and utilization component 2 includes an exhaust pipe 201, a biogas storage tank 202, a gas return pipe 203, and a biogas circulation pump 204. One end of the exhaust pipe 201 is sealed to a gas collection sealing cover 23, and the other end is connected to the biogas storage tank 202 mounted on the exhaust pipe 201. One end of the gas return pipe 203 is connected to the biogas storage tank 202, and the other end is connected to a gas distribution pipe 20 located at the bottom of the membrane separation chamber 8 of the main body 1, returning a portion of the biogas stored in the biogas storage tank 202 to the membrane separation chamber 8 of the main body 1. The biogas circulation pump 204 is mounted on the gas return pipe 203 and is used to process the biogas returning to the main body 1. Pressurization is applied to give the returned biogas a certain pressure. Control component 4 includes a control motherboard 401, control buttons 402, and a touchscreen 403. The output of the control motherboard 401 is electrically connected to the touchscreen 403, inlet valve 14, outlet valve 17, return valve 19, biogas circulation pump 204, and the gas valves on each pipeline of the gas recovery and utilization component 2. The input of the control motherboard 401 is electrically connected to the touchscreen 403, control buttons 402, and oxidation-reduction potential detection electrode 21. Control buttons 402 are used to start and stop the operation of each component, and the touchscreen 403 is used to display the oxidation-reduction potential detection value in real time and set the required limit value for the oxidation-reduction potential.

[0036] In this embodiment, as Figure 2 and Figure 3 As shown, the bottom of the baffle 6 is fixedly installed on the bottom of the main body 1 of the device, and several elongated sludge return ports 601 are opened at the bottom of the baffle 6 to return the sludge settled in the membrane separation chamber 8 to the reaction filtration chamber 7.

[0037] Specifically, the baffle 6 is a rectangular flat plate, which is set on the longitudinal section along the central axis of the main body 1 of the device. The width of the baffle 6 matches the diameter of the main body 1 of the device, and the height of the baffle 6 matches the height of the water inside the main body 1 of the device. The sludge return port 601 is long and narrow, and the height of the sludge return port 601 is 2cm-5cm. It is set as densely as possible while meeting the gravity load requirements.

[0038] In this embodiment, as Figure 3 As shown, the water distribution assembly 9 includes a main water pipe 901, a branch water pipe 902 and a water outlet 903. The main water pipe 901 is connected to the inlet water pipe 13, and the two ends of the main water pipe 901 are evenly connected to the branch water pipe 902. The upper end of the branch water pipe 902 is evenly provided with a water outlet 903.

[0039] Specifically, the sewage enters the main water pipe 901 through the inlet pipe 13, then diffuses into multiple branch pipes 902, and is discharged from the outlet 903, increasing the distribution area of ​​the sewage when it enters the main body 1 of the device.

[0040] In this embodiment, as Figure 2As shown, the filter assembly 3 includes a lower screen plate 301 located directly above the water distribution assembly 9. An upper screen plate 302 is connected above the lower screen plate 301. Filter media 303 is filled between the upper screen plate 302 and the lower screen plate 301. A riser pipe 304 is connected through the upper end of the upper screen plate 302. The lower end of the riser pipe 304 extends to the lower screen plate 301 and is connected to a sludge cover 305. An inclined plate 306 is connected to the upper side of the sludge cover 305 relative to the inner wall of the main body 1 and the baffle 6.

[0041] Specifically, the inclined plate 306 and sludge cover 305 are designed to block the diffused sewage and prevent air bubbles from enveloping and rising the sludge, thus achieving primary filtration of the sewage; the lower screen plate 301, upper screen plate 302 and filter media 303 enable secondary filtration of the sewage.

[0042] In this embodiment, as Figure 2 As shown, an oxidation-reduction potential detection electrode 21 is installed at the upper part of the reaction filter chamber 7. The oxidation-reduction potential detection electrode 21 extends from the detection port of the gas collection sealing cover 23 into the upper part of the reaction filter chamber 7 to measure the temperature and oxidation-reduction potential of the water flowing from the upper part of the reaction filter chamber 7 to the upper part of the membrane separation chamber 8.

[0043] Specifically, the lower end of the oxidation-reduction potential detection electrode 21 with a temperature probe extends into the water body above the reaction filtration chamber 7 to monitor the oxidation-reduction potential of the water in the transition zone between the reaction filtration chamber 7 and the membrane separation chamber 8. The oxidation-reduction potential of the water can directly reflect the anaerobic conditions in the transition zone between the reaction filtration chamber 7 and the membrane separation chamber 8, and indirectly reflect the growth status of microorganisms in the transition zone between the reaction filtration chamber 7 and the membrane separation chamber 8.

[0044] In this embodiment, as Figure 2 and Figure 3 As shown, the membrane separation chamber 8 is equipped with a sludge return plate 22 and an aeration assembly 5. The sludge return plate 22 is located below the membrane assembly 15 and is inclined. Its bottom is fixedly installed at the bottom of the main body 1 of the device and is fixed together with the baffle 6 on the side facing the membrane separation chamber 8. Its upper end is higher than its bottom and is inclined towards the reaction filtration chamber 7. The aeration assembly 5 is located below the membrane assembly 15. The aeration assembly 5 includes multiple aeration pipes 501 corresponding to the membrane assembly 15. The bottom of the aeration pipes 501 is connected to the air distribution pipe 20, and the top end of the aeration pipes 501 is connected to an aeration head 502. The aeration head 502 is located directly below the membrane assembly 15, and the gas generated by the aeration head 502 washes the membrane assembly 15.

[0045] Specifically, the sludge return plate 22 is a semi-circular flat plate structure, which can be made of reinforced concrete or polypropylene material. The inclination angle between the sludge return plate 22 and the bottom plane of the main body 1 is 45-75°. The sludge return port 601 is located at the bottom of the sludge return plate 22 at the bottom of the membrane separation chamber 8, so that the sludge can flow directly into the reaction filtration chamber 7 from the sludge return port 601 after settling to the bottom under gravity.

[0046] In this embodiment, as Figure 2 and Figure 3 As shown, the sludge return plate 22 is a semi-circular flat plate with multiple through holes (not shown in the figure) at positions corresponding to the membrane module 15 above and below. The aeration pipe 501 passes through the through holes from the bottom of the sludge return plate 22 upwards, extends into the membrane separation chamber 8, and extends to the bottom of the membrane module 15.

[0047] In this embodiment, as Figure 2 and Figure 3 As shown, the air distribution pipe 20 is located below the sludge return plate 22. The air distribution pipe 20 is T-shaped, and the tail of the air distribution pipe 20 is connected to the biogas return pipe located outside the main body 1 of the device, and the end is fixedly connected to multiple aeration pipes 501.

[0048] Specifically, under the action of the biogas circulation pump 204, the biogas in the gas return pipe 203 is pressurized and distributed to each aeration pipe 501 through the gas distribution pipe 20. Then, it is aerated through the aeration head 502 to form a large number of bubbles with a certain pressure, which wash the membrane module 15 above the aeration head 502, clean the membrane fibers, and reduce membrane fouling.

[0049] In this embodiment, as Figure 1 and Figure 2 As shown, the inlet pipe 13 and the outlet pipe 16 are respectively equipped with an inlet pump 24 and an outlet pump 25. The exhaust pipe 201 is located between the exhaust port and the biogas storage tank 202 and is equipped with a first gas valve 26. The gas return pipe 203 is located between the biogas circulation pump 204 and the biogas storage tank 202 and is equipped with a second gas valve 27. The inlet pump 24, the outlet pump 25, the first gas valve 26 and the second gas valve 27 are all electrically connected to the output terminal of the control main board 401.

[0050] Specifically, by setting an inlet pump 24, the sewage before treatment is pressurized and flows into the main body 1 of the device; by setting an outlet pump 25, the treated sewage is pressurized and discharged; by setting a first gas valve 26, the biogas generated in the anaerobic reaction chamber 701 is discharged; and by setting a second gas valve 27, the gas stored in the biogas storage tank 202 is introduced into the gas distribution pipe 20.

[0051] The working principle of this utility model is as follows: Before use, the operator sets the limit value of the oxidation-reduction potential required for the discharged sewage on the touch screen 403, and opens the sludge discharge door 11 to add anaerobic sludge into the anaerobic reaction chamber 701; during use, the inlet valve 14 is opened and the inlet pump 24 is started. The sewage to be treated enters the main water pipe 901 of the water distribution component 9 along the inlet pipe 13, then diffuses into multiple branch pipes 902, and is discharged from the outlet 903 to the anaerobic reaction zone of the reaction filter chamber 7. The organic matter in the sewage is fully mixed with the microorganisms of the anaerobic sludge, and can be degraded by the microorganisms, transforming the organic matter in the sewage from large-molecule organic matter into small-molecule organic matter, and finally into biogas. The biogas rises to the collection point. The gas is discharged through the exhaust pipe 201 and stored in the biogas storage tank 202. Part of the biogas is returned to the membrane separation chamber 8 of the membrane bioreactor through the gas return pipe 203. The remaining biogas is purified and reused or directly burned as fuel. As the biogas rises, it also carries the decomposed sludge in the bottom sewage to the surface. First, it is blocked by the sludge cover 305 and the inclined plate 306, which block some of the sludge. The sludge that continues to rise passes through the lower screen plate 301, the filter media 303 and the upper screen plate 302 in sequence, and is thus blocked. Under its own weight, it enters the bottom of the reaction filter chamber 7 and accumulates. The sewage that has been filtered twice continues to rise. When it reaches the upper part of the reaction filter chamber 7, it is subjected to a temperature probe. The oxidation-reduction potential (ORP) detection electrode 21 detects the ORP of the wastewater and transmits it to the control board 401. The control board 401 displays the ORP on the touch screen 403, indicating the anaerobic reaction status. The detected wastewater flows from the top of the baffle 6 into the membrane separation chamber 8. The wastewater is filtered by the membrane module 15. When the ORP of the filtered wastewater has not reached the required limit for discharge, the outlet valve 17 remains closed, and the return valve 19 remains fully open until the ORP reaches the required limit. The wastewater is discharged by opening the outlet valve 17, and then the next batch of wastewater to be treated is processed. The inlet valve 14 is opened and the inlet pump 24 is started. This batch of wastewater to be treated enters the anaerobic reaction zone of the reaction filter chamber 7 along the inlet pipe 13. At the same time, the return valve 19 is opened and the wastewater after the previous batch of treatment enters the inlet pipe 13 along the return pipe 18 to increase the inflow of this batch of wastewater, so as to accelerate the wastewater filtration speed and ensure that the flow rate of wastewater in the main body 1 is not slowed down by the filter media 303. Meanwhile, the water distribution component 9 diffuses a large amount of wastewater into the anaerobic reaction chamber 701 so that it is fully mixed with the microorganisms of anaerobic sludge. The organic matter in the wastewater can be fully degraded by the microorganisms, thereby improving the biodegradation speed.When the wastewater circulates through the return pipe 18 and the oxidation-reduction potential consistently fails to reach the required limit, it indicates that the anaerobic sludge has lost its activity. At this point, the touchscreen 403 displays a message indicating that the anaerobic sludge needs to be replaced. Simultaneously, the unit stops operating, and the operator opens the sludge discharge door 11 to discharge all the sludge from the reaction filter chamber 7. Then, anaerobic sludge is added back in, and the sludge discharge door 11 is closed to begin treating another batch of wastewater.

[0052] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A smart membrane separation device for efficient anaerobic biological treatment, characterized in that, The device includes a main body (1), a gas collection and sealing cover (23), and a gas recovery and utilization component (2). The gas collection and sealing cover (23) is located on the top of the main body (1), and the gas recovery and utilization component (2) is located on one side of the main body (1). The lower end of the main body (1) is welded with a support leg (28). The front surface of the main body (1) is also provided with a control component (4), an inspection door (10), a mud discharge door (11), and an observation window (12). The main body (1) of the device is provided with a baffle (6) in the middle, which divides the main body (1) of the device into a reaction filtration chamber (7) and a membrane separation chamber (8), and the upper parts of the reaction filtration chamber (7) and the membrane separation chamber (8) are connected. A water inlet is provided on one side of the reaction filtration chamber (7), and a water inlet pipe (13) for conveying sewage is provided on the water inlet. A water inlet valve (14) is provided on the water inlet pipe (13). A water distribution assembly (9) connected to the water inlet pipe (13) is provided in the reaction filtration chamber (7). A water distribution assembly (9) for conveying sewage is provided above the water distribution assembly (9) in the reaction filtration chamber (7). The filter assembly (3) for wastewater filtration treatment has an anaerobic reaction chamber (701) located between the water distribution assembly (9) and the filter assembly (3) in the reaction filter chamber (7). The reaction filter chamber (7) has a sludge discharge port and an inspection port at the bottom front side. The sludge discharge door (11) is installed on the sludge discharge port, and the inspection door (10) is installed on the inspection port. The membrane separation chamber (8) has a membrane assembly (15) for membrane separation. The membrane separation chamber (8) has an observation port at the front side, and the observation port is equipped with the observation window (12). The gas collection sealing cover (23) is provided with an exhaust port, a detection port and a water outlet. The exhaust port is connected to the gas recovery and utilization component (2). The detection port is used to fix and install the oxidation-reduction potential detection electrode (21). The water outlet is provided with a water outlet pipe (16) for the water to flow out after membrane separation and purification. The water outlet pipe (16) is connected to the water outlet (903) of the membrane component (15). The water outlet pipe (16) is provided with a water outlet valve (17). A water distribution port is provided on the water outlet pipe (16) in front of the water outlet valve (17). The water distribution port is connected to the water inlet pipe (13) through the water return pipe (18). The water return pipe (18) is provided with a water return valve (19). The gas recovery and utilization component (2) includes an exhaust pipe (201), a biogas storage tank (202), a gas return pipe (203), and a biogas circulation pump (204). One end of the exhaust pipe (201) is sealed to a gas collection sealing cover (23), and the other end is connected to the biogas storage tank (202) set on the exhaust pipe (201). One end of the gas return pipe (203) is connected to the biogas storage tank (202), and the other end is connected to the gas distribution pipe (20) set at the bottom of the membrane separation chamber (8) of the device body (1). The biogas stored in the biogas storage tank (202) is returned to the membrane separation chamber (8) of the device body (1). The biogas circulation pump (204) is set on the gas return pipe (203) and is used to pressurize the biogas returned to the device body (1) so that the returned biogas has a certain pressure. The control component (4) includes a control motherboard (401), control buttons (402) and a touch screen (403). The output terminal of the control motherboard (401) is electrically connected to the touch screen (403), the inlet valve (14), the outlet valve (17), the return valve (19), the biogas circulation pump (204), and the gas valves on each pipeline of the gas recovery and utilization component (2). The input terminal of the control motherboard (401) is electrically connected to the touch screen (403), the control buttons (402), and the oxidation-reduction potential detection electrode (21).

2. The intelligent membrane separation device for efficient anaerobic biological treatment according to claim 1, characterized in that, The gas collecting sealing cover (23) is conical or inverted funnel-shaped, and the shape and size of its bottom match the shape and size of the top of the main body (1) of the device.

3. The intelligent membrane separation device for efficient anaerobic biological treatment according to claim 1, characterized in that, The bottom of the baffle (6) is fixedly installed on the bottom of the main body (1) of the device. Several long strip-shaped sludge return ports (601) are opened at the bottom of the baffle (6) to return the sludge settled in the membrane separation chamber (8) to the reaction filtration chamber (7).

4. The intelligent membrane separation device for efficient anaerobic biological treatment according to claim 1, characterized in that, The water distribution assembly (9) includes a main water pipe (901), a branch water pipe (902) and a water outlet (903). The main water pipe (901) is connected to the inlet water pipe (13), and the two ends of the main water pipe (901) are evenly connected to the branch water pipe (902). The upper end of the branch water pipe (902) is evenly provided with a water outlet (903).

5. The intelligent membrane separation device for efficient anaerobic biological treatment according to claim 1, characterized in that, The filter assembly (3) includes a lower screen plate (301) located directly above the water distribution assembly (9). An upper screen plate (302) is connected above the lower screen plate (301). Filter media (303) is filled between the upper screen plate (302) and the lower screen plate (301). A riser pipe (304) is connected through the upper end of the upper screen plate (302). The lower end of the riser pipe (304) extends to the lower screen plate (301) and is connected to a sludge cover (305). An inclined plate (306) is connected to both the upper side of the sludge cover (305) and the baffle (6) relative to the inner wall of the main body (1).

6. The intelligent membrane separation device for efficient anaerobic biological treatment according to claim 1, characterized in that, A redox potential detection electrode (21) is provided on the upper part of the reaction filter chamber (7), wherein the redox potential detection electrode (21) extends from the detection port of the gas collection sealing cover (23) into the upper part of the reaction filter chamber (7).

7. The intelligent membrane separation device for efficient anaerobic biological treatment according to claim 1, characterized in that, The membrane separation chamber (8) is equipped with a sludge return plate (22) and an aeration assembly (5). The sludge return plate (22) is located below the membrane assembly (15) and is inclined. Its bottom is fixedly installed at the bottom of the main body (1) of the device and fixed together with the baffle (6) on the side facing the membrane separation chamber (8). Its upper end is higher than the bottom and is inclined towards the reaction filtration chamber (7). The aeration assembly (5) is located directly below the membrane assembly (15). The aeration assembly (5) includes multiple aeration pipes (501) corresponding to the membrane assembly (15). The bottom of the aeration pipe (501) is connected to the air distribution pipe (20). The top end of the aeration pipe (501) is connected to an aeration head (502). The aeration head (502) is located directly below the membrane assembly (15), and the gas generated by the aeration head (502) washes the membrane assembly (15).

8. The intelligent membrane separation device for efficient anaerobic biological treatment according to claim 7, characterized in that, The gas distribution pipe (20) is located below the sludge return plate (22). The gas distribution pipe (20) is T-shaped, and the tail of the gas distribution pipe (20) is connected to the biogas return pipe located outside the main body (1) of the device to form a whole. The end is fixedly connected to multiple aeration pipes (501) to form a whole.

9. The intelligent membrane separation device for efficient anaerobic biological treatment according to claim 7, characterized in that, The sludge return plate (22) is a semi-circular flat plate with multiple through holes at positions corresponding to the membrane module (15) above and below. The aeration pipe (501) passes through the through holes from the bottom of the sludge return plate (22) upwards, extends into the membrane separation chamber (8), and extends to the bottom of the membrane module (15).

10. The intelligent membrane separation device for efficient anaerobic biological treatment according to claim 1, characterized in that, The inlet pipe (13) and outlet pipe (16) are respectively equipped with an inlet pump (24) and an outlet pump (25). The exhaust pipe (201) is equipped with a first gas valve (26) between the exhaust port and the biogas storage tank (202). The gas return pipe (203) is equipped with a second gas valve (27) between the biogas circulation pump (204) and the biogas storage tank (202). The inlet pump (24), outlet pump (25), first gas valve (26) and second gas valve (27) are all electrically connected to the output terminal of the control main board (401).

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