Water-saving industrial wastewater treatment system with water circulation

Abstract

The application discloses a water-saving industrial wastewater treatment system with water circulation, and relates to the technical field of wastewater treatment.The system comprises a treatment tank, a first liquid inlet pipe and a second liquid inlet pipe symmetrically arranged on the top of the treatment tank, and a liquid outlet pipe connected to the bottom of the treatment tank; a grid and a sealing plate are sequentially installed in the treatment tank from top to bottom, the grid and the treatment tank jointly define a first space, the grid, the sealing plate and the treatment tank jointly define a second space, and the sealing plate and the treatment tank jointly define a third space; at least two membrane filtration assemblies are arranged outside the treatment tank and are communicated with the second space, the membrane filtration assemblies are used for receiving water bodies after passing through the grid and performing membrane filtration, and the water bodies after membrane filtration enter the third space through a connecting pipe.The system has good water-saving effect, high treatment efficiency, and the treated water bodies can be directly used as industrial water, thereby realizing water recycling.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and more specifically to a water-saving industrial wastewater treatment system with water circulation. Background Technology

[0002] In the industrial sector, water recycling and pollutant control are key aspects of sustainable development. With the expansion of industrial scale, industrial wastewater discharge continues to grow. How to achieve wastewater recycling through technological means, reduce fresh water consumption, and lower environmental pollution has become a focus of industry attention.

[0003] Membrane filtration technology plays a crucial role in industrial wastewater treatment and reuse due to its high separation efficiency. It effectively removes pollutants such as suspended solids, colloids, and microorganisms, ensuring the quality of reclaimed water. However, existing membrane filtration systems still face some technical challenges in practical applications.

[0004] Specifically, traditional membrane filtration systems typically employ a single-module design, meaning the entire system consists of only one membrane filtration module. While this design is simple in structure, it suffers from low reliability: when the membrane module requires backwashing or chemical cleaning due to fouling (such as oil or colloidal deposits), the entire system must be shut down, leading to an interruption in the industrial water treatment process.

[0005] Furthermore, existing membrane cleaning technologies have significant shortcomings in efficiency and environmental friendliness. Taking backwashing as an example, the cleaning process requires pausing filtration operations and using reverse water flow to remove contaminants from the membrane surface. This step-by-step "shutdown-cleaning" mode directly leads to a decrease in treatment efficiency, especially during periods of frequent contamination, where frequent shutdowns for cleaning significantly reduce the overall system capacity. More importantly, the oil, colloids, and other contaminants removed by backwashing are not collected or extracted in a timely manner, easily re-adhere to other areas of the membrane surface, or diffuse into the water, forming "secondary pollution." This not only negates some of the cleaning effect but may also accelerate the accumulation of contaminants on the membrane surface.

[0006] Although some improved technologies attempt to enhance the cleaning effect through vibration-assisted cleaning (such as ultrasonic vibration), the vibration energy is transmitted to the uncleaned area through the membrane structure, resulting in disordered vibration of the membrane surface and accelerating the mechanical fatigue of the membrane material.

[0007] Therefore, it is necessary to provide a water-saving industrial wastewater treatment system with water circulation to solve the above problems. Summary of the Invention

[0008] To address the above problems, the present invention provides the following technical solution: a water-saving industrial wastewater treatment system with water circulation, comprising:

[0009] The processing tank has a first inlet pipe and a second inlet pipe that are symmetrically arranged at the top, and an outlet pipe at the bottom.

[0010] A grille and a sealing plate are installed sequentially from top to bottom inside the processing tank. The grille and the processing tank together define a first space, the grille, the sealing plate, and the processing tank together define a second space, and the sealing plate and the processing tank together define a third space.

[0011] At least two membrane filtration units are located outside the treatment tank and communicate with the second space. The membrane filtration units are used to receive water that has passed through the grid and perform membrane filtration. The filtered water enters the third space through a connecting pipe.

[0012] The first inlet pipe and the second inlet pipe are connected to the first space, and the outlet pipe is connected to the third space.

[0013] Furthermore, preferably, the membrane filtration assembly includes:

[0014] The outer tank is connected to the second space of the processing tank via a connecting cylinder;

[0015] A filter membrane tank is fixed inside the outer tank. The top of the filter membrane tank is connected to the connecting pipe, and the end of the connecting pipe away from the filter membrane tank passes through the connecting cylinder and the sealing plate.

[0016] Furthermore, as a preferred embodiment, a first lead screw and a limiting rod are rotatably arranged in the filter membrane tank, a backflush assembly is drivenly connected to the first lead screw, and the backflush assembly is also slidably connected to the limiting rod;

[0017] Multiple second lead screws are rotatably installed in the outer tank. The multiple second lead screws are arranged around the circumference of the filter membrane tank, and a suction seat is connected to the multiple second lead screws for transmission.

[0018] The bottom of the filter membrane tank is provided with a transmission chamber, and a transmission assembly is installed in the transmission chamber. The transmission assembly is used to transmit the power of the first lead screw to the second lead screw.

[0019] Furthermore, preferably, the transmission component is any one of a gear transmission component, a synchronous pulley transmission component, or a gear chain transmission component;

[0020] The transmission assembly is configured to move the suction seat and the recoil assembly synchronously.

[0021] Furthermore, as a preferred embodiment, the suction seat is an annular structure, and the inner wall of the suction seat is provided with a plurality of suction heads corresponding to the backflush assembly;

[0022] A suction pipe is fixedly installed through the outer tank, and a telescopic tube is slidably connected to the bottom of the suction pipe. The other end of the telescopic tube is connected to the suction seat.

[0023] Furthermore, preferably, the recoil assembly includes:

[0024] A backflush seat is connected to the first lead screw, and a flushing micro-pump is provided in the backflush seat;

[0025] Multiple backflush heads are distributed circumferentially along the backflush seat, the multiple backflush heads are connected to the backflush seat, the multiple backflush heads are supplied with liquid by the flushing micropump, and multiple extension plates are integrally extended from the inner wall of the backflush head;

[0026] An attachment seat is attached to the extension plate. A vibrating plate is provided at one end of the attachment seat near the recoil seat, and a vibrating head is provided at the other end.

[0027] Furthermore, as a preferred embodiment, the recoil seat is provided with a through hole.

[0028] Furthermore, as a preferred embodiment, the outside of the punch head is connected to multiple vibration damping heads by elastic elements, and the multiple vibration damping heads are distributed at intervals along the circumference of the punch head.

[0029] Furthermore, as a preferred embodiment, a filter cartridge is sleeved between the first inlet pipe and the second inlet pipe.

[0030] Furthermore, as a preferred embodiment, the first inlet pipe is used to supply industrial wastewater, the second inlet pipe is used to supply pharmaceutical solution, and the outlet pipe is used to return the filtered clear liquid to the industrial site.

[0031] Compared with the prior art, the present invention provides a water-saving industrial wastewater treatment system with water circulation, which has the following beneficial effects:

[0032] 1. In this invention, at least two independent membrane filtration components are configured and connected to the second space of the treatment tank via a connecting cylinder. When a membrane filtration component requires chemical cleaning, its connecting cylinder can be sealed individually, while the other components continue to filter normally, avoiding a system shutdown. For example, when the first membrane filtration component is being chemically cleaned, the second membrane filtration component continues to operate, ensuring uninterrupted wastewater treatment and significantly improving the reliability and efficiency of the system.

[0033] 2. In this invention, the membrane filtration assembly integrates a backwash component and a suction seat, forming a synergistic "rinsing-suction" mechanism: the backwash component impacts the membrane surface in the opposite direction, peeling off oil, colloids, and other adhering substances; the suction seat follows the backwash path, using a circumferential suction head to promptly suction out the detached contaminants, preventing secondary adhesion. Simultaneously, the backwash head contains a vibrating plate and a vibrating head, utilizing the water flow impact to generate high-frequency vibrations, physically peeling off stubborn dirt such as microbial membranes and inorganic scale. The synergistic effect of these three components improves cleaning efficiency and reduces the frequency of chemical cleaning.

[0034] 3. In this invention, the external shock absorber is connected to the vibration damping head via an elastic element. The buffering effect of the elastic element absorbs the vibration energy transmitted to the non-shock area, preventing fatigue damage to the membrane structure due to disordered vibration. Simultaneously, it reduces impurity diffusion in the non-shock area, improving the long-term stability of the system.

[0035] 4. This treatment system has good water-saving effect and high treatment efficiency. The water treated by the membrane filtration module can be directly used as industrial water, realizing water recycling. In addition, the backwash head can directly use the water inside the membrane filtration module for backwashing, which has the effect of being fast and water-saving. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the main structure of a water-saving industrial wastewater treatment system with water circulation.

[0037] Figure 2 This is a three-dimensional structural diagram of a water-saving industrial wastewater treatment system with water circulation.

[0038] Figure 3 This is a cross-sectional schematic diagram of a water-saving industrial wastewater treatment system with water circulation.

[0039] Figure 4 This is a schematic diagram of the structure of a membrane filtration component in a water-saving industrial wastewater treatment system with water circulation.

[0040] Figure 5 for Figure 4 A magnified structural diagram at point A;

[0041] In the diagram: 1. Processing tank; 2. First inlet pipe; 3. Second inlet pipe; 4. Filter cartridge; 5. Grille; 6. Sealing plate; 7. Connecting cylinder; 8. Membrane filtration assembly; 9. Connecting pipe; 10. Outlet pipe; 81. Outer tank; 82. Filter membrane tank; 83. First lead screw; 84. Backflush assembly; 85. Limiting rod; 86. Second lead screw; 87. Suction pipe; 88. Telescopic pipe; 89. Transmission assembly; 810. Suction seat; 841. Backflush head; 8411. Extension plate; 842. Attachment seat; 843. Vibrating plate; 844. Vibrating head; 845. Vibration damping head; 846. Elastic element. Detailed Implementation

[0042] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms are interchangeable where appropriate; this is merely a way of distinguishing objects with the same attributes in the embodiments of this application. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion, so that a process, method, system, product, or apparatus that comprises a series of elements is not necessarily limited to those elements, but may include other elements not explicitly listed or inherent to those processes, methods, products, or apparatuses.

[0043] Example: Please refer to Figures 1-5 In this embodiment of the invention, a water-saving industrial wastewater treatment system with water circulation is provided, comprising:

[0044] The processing tank 1 has a first inlet pipe 2 and a second inlet pipe 3 that are symmetrically arranged at the top, and an outlet pipe 10 that is connected to the bottom.

[0045] A grille 5 and a sealing plate 6 are installed sequentially from top to bottom inside the processing tank 1. The grille 5 and the processing tank 1 together define a first space, the grille 5, the sealing plate 6 and the processing tank 1 together define a second space, and the sealing plate 6 and the processing tank 1 together define a third space.

[0046] At least two membrane filtration units 8 are located outside the treatment tank 1 and connected to the second space. The membrane filtration units 8 are used to receive water that has passed through the grid 5 and perform membrane filtration. The filtered water enters the third space through the connecting pipe 9.

[0047] The first inlet pipe 2 and the second inlet pipe 3 are connected to the first space, and the outlet pipe 10 is connected to the third space.

[0048] The first inlet pipe 2 supplies industrial wastewater, and the second inlet pipe 3 supplies a chemical solution. The chemical solution neutralizes or degrades pollutants, improving subsequent filtration efficiency. The outlet pipe 10 returns the filtered liquid to the industrial site. A filter cartridge 4 is fitted between the first inlet pipe 2 and the second inlet pipe 3. Industrial wastewater enters the first space at the top of the treatment tank 1 through the first inlet pipe 2, while the chemical solution is simultaneously injected through the second inlet pipe 3. After the industrial wastewater and chemical solution mix and react in the first space, they undergo preliminary filtration through the filter cartridge 4, and then pass through the grille 5 into the second space. The grille further intercepts residual suspended solids, ensuring the water entering the second space is relatively clean. The water in the second space enters the external membrane filtration assembly 8 through the connecting pipe 7. The core of the membrane filtration assembly 8 is the membrane tank 82, which contains a filter membrane (such as an ultrafiltration membrane or reverse osmosis membrane). After the water penetrates the filter membrane, the clarified liquid enters the third space through the connecting pipe 9, and is finally returned to the industrial site for recycling via the outlet pipe 10.

[0049] It should be explained that the membrane filter assembly 8 is independent of the treatment tank 1, but is connected to the second space of the treatment tank 1 via the connecting cylinder 7, and there are at least two of them (the first membrane filter assembly and the second membrane filter assembly, respectively). This design has the following advantages:

[0050] When one membrane filter element 8 requires chemical cleaning, the other elements can continue to treat the water, preventing the entire system from shutting down. For example, if the first membrane filter element needs chemical cleaning, it can be disassembled and the corresponding connecting cylinder 7 sealed, allowing the first membrane filter element to be soaked in chemicals separately. Meanwhile, the second membrane filter element can still filter normally, ensuring continuous treatment capacity.

[0051] In the prior art, even with backwashing, the membrane filter assembly 8 still needs to be shut down before the backwashing system can be restarted for rinsing. However, in this application, backwashing can be performed without shutting down the system. Specifically, the membrane filter assembly 8 includes:

[0052] The outer tank 81 is connected to the second space of the processing tank 1 via the connecting cylinder 7;

[0053] A filter membrane tank 82 is fixed inside the outer tank 81. The top of the filter membrane tank 82 is connected to the connecting pipe 9. The end of the connecting pipe 9 away from the filter membrane tank 82 passes through the connecting cylinder 7 and the sealing plate 6.

[0054] The filter membrane tank 82 is rotatably provided with a first lead screw 83 and a limiting rod 85. A backflush assembly 84 is drivenly connected to the first lead screw 83, and the backflush assembly 84 is also slidably connected to the limiting rod 85.

[0055] Multiple second lead screws 86 are rotatably arranged in the outer tank 81. The multiple second lead screws 86 are arranged around the filter membrane tank 82. A suction seat 810 is connected to the multiple second lead screws 86 in a common driving manner.

[0056] The bottom of the filter membrane tank 82 is provided with a transmission chamber, and a transmission assembly 89 is installed in the transmission chamber. The transmission assembly 89 is used to transmit the power of the first lead screw 83 to the second lead screw 86.

[0057] In other words, in this embodiment, the membrane filter assembly 8 is equipped with a backwash assembly 84. For minor contamination of the filter membrane surface (such as oil or colloids), the backwash assembly 84 can be used for reverse rinsing without stopping the machine. The filter membrane tank 82 is a tank structure in general. Its top and bottom are made of rigid, waterproof material, and the middle part is the filter membrane structure. The filter membrane structure includes a support structure and a filter membrane attached to the support structure.

[0058] In addition, a suction seat 810 is provided on the outside of the filter membrane tank 82. The suction seat 810 can promptly suck up oil and other impurities that have been backflushed off the filter membrane to prevent them from re-attaching.

[0059] Furthermore, the transmission component 89 is any one of a gear transmission component, a synchronous pulley transmission component, or a gear chain transmission component;

[0060] The transmission assembly 89 is configured to move the suction seat 810 synchronously with the recoil assembly 84.

[0061] If the transmission assembly 89 is a gear transmission assembly, the gear at the end of the first lead screw 83 drives the gear at the end of the second lead screw 86 to achieve drive; if it is a synchronous belt, the first lead screw 83 and the second lead screw 86 are connected by the belt, resulting in a simple structure and smooth transmission. While the backwash assembly 84 washes the surface of the filter membrane, the suction seat 810 follows closely behind to suck up the contaminants, forming a continuous "washing-suction" operation process without the need to stop the machine and wait for cleaning to be completed.

[0062] Furthermore, the suction seat 810 has an annular structure, and the inner wall of the suction seat 810 is provided with a plurality of suction heads corresponding to the recoil assembly 84;

[0063] A suction pipe 87 is fixedly installed through the outer tank 81. A telescopic pipe 88 is slidably connected to the bottom of the suction pipe 87. The other end of the telescopic pipe 88 is connected to the suction seat 810.

[0064] In this embodiment, the recoil assembly 84 includes:

[0065] A backflush seat is connected to the first lead screw 83, and a flushing micro-pump is provided in the backflush seat;

[0066] Multiple backflush heads 841 are distributed circumferentially along the backflush seat, the multiple backflush heads 841 are connected to the backflush seat, the multiple backflush heads 841 are supplied with liquid by the flushing micropump, and multiple extension plates 8411 are integrally extended from the inner wall of the backflush head 841.

[0067] An attachment seat 842 is attached to the extension piece 8411. A vibrating plate 843 is provided at one end of the attachment seat near the recoil seat, and a vibrating head 844 is provided at the other end.

[0068] When the flushing micropump is working, high-pressure water is ejected through circumferentially distributed backflush heads 841, impacting the filter membrane surface in the reverse direction and peeling off the deposits. An attachment seat 842 is attached to an integrally extended plate 8411 on the inner wall of the backflush head. A vibrating plate 843 is located at one end near the backflush seat, and a vibrating head 844 is located at the other end. The water jet from the flushing micropump impacts the vibrating plate 843, causing it to vibrate at high frequency. This vibration drives the vibrating head 844 to strike the filter membrane surface, assisting in the physical removal of stubborn dirt.

[0069] The vibrating plate can be made of stainless steel spring plate, which generates resonance through the impact of water flow.

[0070] Furthermore, the backwash seat is provided with a through hole. When the backwash assembly 84 moves axially along the filter membrane tank 82, the backwash seat may temporarily separate the water in the lower part and the upper part of the filter membrane tank 82 (for example, if the backwash seat is located in the middle of the filter membrane tank 82, the water in the lower part needs to flow through the top of the backwash seat to the upper part). If there is no through hole design, the flow path of the lower water is blocked, which may lead to an increase in pressure in the lower part of the filter membrane tank 82, affecting the filtration efficiency, forming a dead zone in the water flow, and accumulating pollutants in the dead zone, thus aggravating membrane fouling.

[0071] Multiple through holes are evenly distributed on the backwash seat, allowing water to flow freely above and below the backwash seat.

[0072] In this embodiment, the outside of the anti-knock head 841 is connected to a plurality of vibration damping heads 845 by an elastic element 846, and the plurality of vibration damping heads 845 are distributed at intervals along the circumference of the anti-knock head 841.

[0073] It should be explained that the transmission of vibration energy in the non-recoil region not only accelerates the fatigue of the filter membrane structure, but may also cause impurities to diffuse due to disordered vibration, rather than be concentrated in the suction area of ​​the suction seat 810.

[0074] In this embodiment, the elastic element absorbs the vibration energy transmitted to the non-recoil region through its buffering effect, thus preventing fatigue of the filter membrane surface. The stiffness of the elastic element needs to match the characteristics of the filter membrane material, and it also needs to have appropriate deformation capacity so as to generate guiding force through deformation while suppressing vibration.

[0075] When the recoil head vibrates, the vibration energy is transmitted to the non-recoil area through the filter membrane structure. The vibration damping head 845 absorbs and disperses the vibration energy through the buffering effect of the elastic element, reducing the vibration amplitude of the membrane surface in the non-recoil area by more than 80%. While absorbing the vibration energy, the elastic element produces controllable deformation.

[0076] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A water saving industrial wastewater treatment system having water circulation, characterized by, The utility model relates to a water treatment device, including: a treatment tank (1) is connected with first liquid inlet pipe (2) and second liquid inlet pipe (3) of symmetric setting top, and the bottom is connected with liquid outlet pipe (10); grating (5) and baffle (6) are installed in the treatment tank (1) inside from top to bottom in proper order, the grating (5) and treatment tank (1) jointly define first space, the grating (5), baffle (6) and treatment tank (1) jointly define second space, the baffle (6) and treatment tank (1) jointly define third space; at least two membrane filtration assemblies (8) are located in the outside of treatment tank (1) and are communicated with the second space, and the membrane filtration assembly (8) is used to receive water body after passing through the grating (5) and carries out membrane filtration, and the water body after membrane filtration enters the third space through connecting pipe (9); Wherein, the first liquid inlet pipe (2) and second liquid inlet pipe (3) are communicated with the first space, and the liquid outlet pipe (10) is communicated with the third space; The membrane filtration assembly (8) includes: outer tank body (81) and filter membrane tank (82), the filter membrane tank (82) is fixed in the inside of outer tank body (81); The first lead screw (83) and the limiting rod (85) are rotatably arranged in the filter membrane tank (82), the first lead screw (83) is drivingly connected with the backflushing assembly (84), and the backflushing assembly (84) is also slidingly connected with the limiting rod (85); The backflushing assembly (84) includes: backflushing seat, the backflushing seat is drivingly connected with the first lead screw (83), and the backflushing seat is provided with a washing micropump; A plurality of backflushing heads (841) are circumferentially spaced apart along the backflushing seat, the plurality of backflushing heads (841) are connected to the backflushing seat, the plurality of backflushing heads (841) are supplied with liquid by the washing micropump, and the inner wall of the backflushing head (841) integrally extends a plurality of extension pieces (8411); An attachment seat (842) is attached to the extension piece (8411), one end of the attachment seat (842) is provided with a vibration plate (843) close to the backflushing seat, and the other end is provided with a vibration head (844); A plurality of vibration-stopping heads (845) are connected to the backflushing head (841) outside by elastic members (846), and the plurality of vibration-stopping heads (845) are circumferentially spaced apart along the backflushing head (841).

2. The water saving industrial wastewater treatment system with water circulation according to claim 1, wherein, The outer tank body (81) is communicated with the second space of the treatment tank (1) through the connecting cylinder (7); The connecting pipe (9) is connected to the top of the filter membrane tank (82), and one end of the connecting pipe (9) away from the filter membrane tank (82) penetrates the connecting cylinder (7) and the baffle (6).

3. The water saving industrial wastewater treatment system with water circulation according to claim 1, wherein, A plurality of second lead screws (86) are rotatably arranged in the outer tank body (81), the plurality of second lead screws (86) are circumferentially arranged around the filter membrane tank (82), and a suction seat (810) is drivingly connected to the plurality of second lead screws (86). The inner bottom of the filter membrane tank (82) is provided with a transmission bin, and a transmission assembly (89) is installed in the transmission bin.

4. The water saving industrial wastewater treatment system with water circulation according to claim 3, characterized in that, The transmission assembly (89) is any one of a gear transmission assembly, a synchronous wheel transmission assembly and a gear chain transmission assembly. The transmission assembly (89) is configured to synchronously move the suction seat (810) and the backflush assembly (84).

5. The water saving industrial wastewater treatment system with water circulation according to claim 3, wherein, The suction seat (810) is in a ring shape, and the inner wall of the suction seat (810) is provided with a plurality of suction heads corresponding to the backflush assembly (84). A suction pipe (87) is fixedly and penetratingly arranged on the outer tank body (81), and a telescopic pipe (88) is slidingly connected to the bottom of the suction pipe (87), and the other end of the telescopic pipe (88) is in communication with the suction seat (810).

6. The water saving industrial wastewater treatment system with water circulation according to claim 1, wherein, A through hole is formed in the backflush seat.

7. The water saving industrial wastewater treatment system with water circulation according to claim 1, wherein, A filter cartridge (4) is sleeved between the first liquid inlet pipe (2) and the second liquid inlet pipe (3).

8. The water saving industrial wastewater treatment system with water circulation according to claim 1, wherein, The first liquid inlet pipe (2) is used for supplying industrial wastewater, the second liquid inlet pipe (3) is used for supplying liquid medicine, and the liquid outlet pipe (10) is used for sending the filtered clear liquid back to an industrial site.

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