Filtering integrated device for treating industrial wastewater based on large-flux porous filter membrane

Abstract

The utility model relates to an integrated filtration device for treating industrial wastewater based on a large-flux porous filter membrane, which comprises a collecting and lifting module, a pretreatment module, a multi-stage concentration module and a large-flux porous membrane module, a wastewater collecting tank is arranged in the collecting and lifting module, and the wastewater collecting tank is externally connected with a wastewater lifting pump; the pretreatment module comprises a sodium carbonate dosing reaction system, a sodium hydroxide dosing reaction system and a magnesium oxide dosing reaction system, a multi-stage concentration reaction box and a multi-stage concentration slurry pump are arranged in the multi-stage concentration module, a reflux device is arranged in the large-flux porous membrane module, and the outer side of the large-flux porous membrane module is connected with a membrane recovery cleaning device. The integrated equipment disclosed by the utility model effectively replaces the traditional coagulating sedimentation filtering equipment, and a more stable water outlet effect is obtained by using a smaller occupied area and less investment.

Description

Technical Field

[0001] The utility model belongs to the technical field of industrial wastewater treatment, and in particular relates to a filtering integrated device for treating industrial wastewater based on a large-flux porous filter membrane. Background Art

[0002] In recent years, more and more industrial wastewater has been generated in the production and operation of coal chemical industry, electric power, mining, printing and dyeing, electroplating and other industries. The wastewater has complex components, is slightly toxic, has large discharge volume, is high in salt, and contains a large amount of inorganic salt ions. Near-zero discharge of wastewater has become the main trend at present. High hardness and high silicon content have become one of the key factors restricting zero discharge of industrial wastewater.

[0003] At present, the zero-discharge pretreatment equipment for high-salt wastewater has problems such as complex process route, poor system stability, large footprint, and high operating cost. Utility Model Content

[0004] The purpose of the utility model is to solve the above-mentioned problems. The present application proposes a filtration integrated device for treating industrial wastewater based on a large-flux porous filter membrane, which effectively replaces the traditional coagulation sedimentation filtration equipment and obtains a more stable water output effect with a smaller footprint and less investment.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a filtering integrated device for treating industrial wastewater based on a large-flux porous filter membrane, comprising a collecting and lifting module, a pretreatment module, a multi-stage concentration module and a large-flux porous membrane module, wherein the collecting and lifting module is connected to the pretreatment module, the pretreatment module is connected to the multi-stage concentration module, the multi-stage concentration module is connected to the large-flux porous membrane module, and the large-flux porous membrane module is connected to a water production and water return device;

[0006] A wastewater collection tank is provided inside the collection and lifting module, and a wastewater lifting pump is connected to the wastewater collection tank;

[0007] The pretreatment module comprises a sodium carbonate dosing reaction system, a sodium hydroxide dosing reaction system and a magnesium oxide dosing reaction system, wherein the sodium carbonate dosing reaction system, the sodium hydroxide dosing reaction system and the magnesium oxide dosing reaction system are all provided with a dosing metering pump, an online pH meter and a dosing mixer;

[0008] The multi-stage concentration module is provided with a multi-stage concentration reaction box and a multi-stage concentration slurry pump;

[0009] The large-flux porous membrane module is provided with a reflux device and a tubular microfiltration membrane assembly, and the tubular microfiltration membrane assembly is provided with an automatic valve. The large-flux porous membrane module is connected to a membrane restorative cleaning device on the outside.

[0010] Furthermore: an ultrasonic mud level meter and an online thermometer are provided in the multi-stage concentration reaction box.

[0011] Furthermore: the multi-stage concentrated slurry pump is a circulating water inlet pump for the tubular microfiltration membrane and also a sludge discharge pump for the multi-stage concentrated module. An electromagnetic flowmeter is also arranged behind the multi-stage concentrated slurry pump.

[0012] Furthermore: the large-flux porous membrane module is placed above the membrane frame, and the collection and lifting module, pretreatment module and multi-stage concentration module are placed below the membrane frame.

[0013] Furthermore: the material of the tubular microfiltration membrane assembly is PVDF.

[0014] Furthermore: the collection and lifting module, pretreatment module, multi-stage concentration module, and large-flux porous membrane module are skid-mounted as an integrated device, and a water inlet and outlet are reserved.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] This device uses the interception capacity of large-flux porous membranes to treat heavy metal ions (Ca²⁺, Mg²⁺, Ba²⁺, Sr²⁺, Si 4+ ) to achieve solid-liquid separation and achieve the purpose of softening, removing hardness and silicon.

[0017] This device makes comprehensive use of chemical reactions and the physical properties of porous membranes, and skids together the collection and lifting module, pretreatment module, multi-stage concentration module, and large-flux porous membrane module into an integrated intelligent assembled equipment, effectively replacing traditional coagulation sedimentation filtration equipment, and obtaining a more stable water output effect with a smaller footprint and less investment. It is also equipped with automatic valves, water production and return water systems, membrane recovery cleaning devices, and instrument online detection systems, which can realize a series of operations such as fully automatic operation, flushing, and backwashing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only for more clearly illustrating the embodiments of the utility model or the technical solutions in the prior art. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 A cross-sectional view showing the overall structure of the utility model;

[0020] In the figure: 1-collection and lifting module, 2-pretreatment module, 3-multi-stage concentration module, 4-large flux porous membrane module, 5-sodium carbonate dosing reaction system, 6-sodium hydroxide dosing reaction system, 7-magnesium oxide dosing reaction system, 8-dosing metering pump, 9-membrane recovery cleaning device, 10-water production and return water device, 11-automatic valve. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand and implement the technical solution of the utility model, the utility model is further described below in conjunction with specific embodiments. However, the embodiments are only used as an explanation of the utility model and are not intended to limit the utility model.

[0022] like Figure 1 A filtering integrated device for treating industrial wastewater based on a large-flux porous filter membrane is shown, comprising a collecting and lifting module 1, a pretreatment module 2, a multi-stage concentration module 3 and a large-flux porous membrane module 4, wherein the collecting and lifting module 1 is connected to the pretreatment module 2, the pretreatment module 2 is connected to the multi-stage concentration module 3, the multi-stage concentration module 3 is connected to the large-flux porous membrane module 4, the large-flux porous membrane module 4 is connected to a water production and water return device 10, and the collecting and lifting module 1, the pretreatment module 2 and the multi-stage concentration module 3 are placed under the membrane frame.

[0023] The collection and lifting module 1 is provided with a wastewater collection pool, and the wastewater collection pool is externally connected to a wastewater lifting pump.

[0024] The pretreatment module 2 includes a sodium carbonate dosing reaction system 5, a sodium hydroxide dosing reaction system 6 and a magnesium oxide dosing reaction system 7. The sodium carbonate dosing reaction system 5, the sodium hydroxide dosing reaction system 6 and the magnesium oxide dosing reaction system 7 are all equipped with a dosing metering pump, an online pH meter and a paddle-type dosing mixer to ensure efficient and stable operation.

[0025] The multi-stage concentration module 3 is provided with a multi-stage concentration reaction box and a multi-stage concentration slurry pump; the multi-stage concentration reaction box is provided with an ultrasonic mud level meter and an online thermometer to monitor the operating status of the device in real time; the multi-stage concentration slurry pump is both a circulating water inlet pump for the tubular microfiltration membrane and a mud discharge pump for the multi-stage concentration module; an electromagnetic flowmeter is also provided behind the multi-stage concentration slurry pump.

[0026] The high-flux porous membrane module 4 is provided with a reflux device and a tubular microfiltration membrane assembly, and the tubular microfiltration membrane assembly is provided with an automatic valve 11. The high-flux porous membrane module 4 is connected to a membrane restorative cleaning device 9 on the outside, which can realize a series of operations such as fully automatic operation, flushing, and backwashing.

[0027] The tubular microfiltration membrane assembly is made of PVDF, which greatly improves the wear resistance of the membrane element, thereby increasing the service life of the equipment. The tubular microfiltration membrane assembly uses the interception capacity of the porous membrane to remove some heavy metals (Ca²⁺, Mg²⁺, Ba²⁺, Sr²⁺, Si 4+ ).

[0028] The collecting and lifting module 1, the pretreatment module 2, the multi-stage concentration module 3, and the large-flux porous membrane module 4 are skid-mounted as an integrated device. The large-flux porous membrane module 4 is placed above the membrane frame, and the collecting and lifting module 1, the pretreatment module 2 and the multi-stage concentration module 3 are placed below the membrane frame, which greatly reduces the footprint. The device also reserves a water inlet and a water outlet, which not only shortens the construction period, but also saves a lot of civil engineering investment costs.

[0029] Working principle:

[0030] The wastewater is lifted from the wastewater collection tank by the wastewater lifting pump and enters the pretreatment module. After the first stage of chemical reaction, the wastewater enters the magnesium oxide dosing reaction system for the second stage of chemical reaction. After the reaction is complete, the wastewater enters the multi-stage concentration reaction box and is transported to the large-flux porous membrane module by the multi-stage concentration slurry pump. The tubular microfiltration membrane assembly is used for efficient filtration, and the filtered water is stored in the water production and backwashing device for reuse or deep treatment. At the same time, the backwashing operation process of the tubular membrane is completed under the action of the backwashing pump. In addition, the large-flux porous membrane module is also provided with a reflux device. The refluxed wastewater and the generated concentrated water return to the multi-stage concentration reaction box for circulation and concentration. When the sludge concentration reaches a certain amount, it is discharged by the multi-stage concentration slurry pump.

[0031] After running for a period of time, the tubular microfiltration membrane assembly will be partially blocked. Turn on the membrane recovery cleaning device to directly perform chemical cleaning to restore the optimal performance of the equipment.

[0032] After being treated by this device, the hardness of the effluent reaches below 100 mg / L, and the silicon content reaches below 10 mg / L. Compared with traditional coagulation sedimentation and filtration equipment, the effluent quality is greatly improved.

[0033] The utility model makes comprehensive use of chemical reactions and the physical properties of porous membranes, and skids together the collection and lifting module, pretreatment module, multi-stage concentration module, and high-flux porous membrane module into an integrated intelligent assembled equipment, effectively replacing traditional coagulation sedimentation filtration equipment, and obtaining a more stable effluent effect with a smaller footprint and less investment. At the same time, it is equipped with automatic valves, membrane recovery cleaning devices, and instrument online detection systems, and can realize a series of operations such as fully automatic operation, flushing, and backwashing.

[0034] The contents not described in detail in the present invention are all prior art.

[0035] The above is only a preferred embodiment of the utility model, and is not limited to the description in the specification and implementation. Therefore, any equivalent changes or modifications made according to the structure, features and principles described in the scope of the utility model patent application should be included in the scope of the utility model patent application.

Claims

1. A filtering integrated device for treating industrial wastewater based on a large-flux porous filter membrane, comprising a collection and lifting module (1), a pretreatment module (2), a multi-stage concentration module (3) and a large-flux porous membrane module (4), characterized in that: The collection and lifting module (1) is connected to the pretreatment module (2), the pretreatment module (2) is connected to the multi-stage concentration module (3), the multi-stage concentration module (3) is connected to the large-flux porous membrane module (4), and the large-flux porous membrane module (4) is connected to the water production and return device (10); The collection and lifting module (1) is provided with a wastewater collection pool, and the wastewater collection pool is externally connected to a wastewater lifting pump; The pretreatment module (2) comprises a sodium carbonate dosing reaction system (5), a sodium hydroxide dosing reaction system (6) and a magnesium oxide dosing reaction system (7), wherein the sodium carbonate dosing reaction system (5), the sodium hydroxide dosing reaction system (6) and the magnesium oxide dosing reaction system (7) are all provided with a dosing metering pump, an online pH meter and a dosing stirrer; The multi-stage concentration module (3) is provided with a multi-stage concentration reaction box and a multi-stage concentration slurry pump; The high-flux porous membrane module (4) is provided with a reflux device and a tubular microfiltration membrane assembly, and the tubular microfiltration membrane assembly is provided with an automatic valve (11). The high-flux porous membrane module (4) is externally connected to a membrane restorative cleaning device (9).

2. The integrated filtering device for treating industrial wastewater based on a large-flux porous filter membrane according to claim 1, characterized in that: An ultrasonic mud level meter and an online thermometer are arranged in the multi-stage concentration reaction box.

3. The filtration integrated device for treating industrial wastewater based on a large-flux porous filter membrane according to claim 1, characterized in that: The multi-stage concentrated slurry pump is a circulating water inlet pump for the tubular microfiltration membrane and also a sludge discharge pump for the multi-stage concentrated module. An electromagnetic flowmeter is also arranged behind the multi-stage concentrated slurry pump.

4. The integrated filtering device for treating industrial wastewater based on a large-flux porous filter membrane according to claim 1, characterized in that: The large-flux porous membrane module (4) is placed above the membrane frame, and the collection and lifting module (1), the pretreatment module (2) and the multi-stage concentration module (3) are placed below the membrane frame.

5. The integrated filtering device for treating industrial wastewater based on a large-flux porous filter membrane according to claim 1, characterized in that: The material of the tubular microfiltration membrane assembly is PVDF.

6. The integrated filtering device for treating industrial wastewater based on a large-flux porous filter membrane according to claim 1, characterized in that: The collection and lifting module (1), the pretreatment module (2), the multi-stage concentration module (3), and the large-flux porous membrane module (4) are skid-mounted as an integrated device, and a water inlet and a water outlet are reserved.

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