A non-submerged membrane separation device

Abstract

A non-submerged membrane separation device includes a liquid inlet pipeline, a membrane assembly, a liquid replenishment pipeline, a liquid collection system, and a liquid outlet pipeline. The membrane assembly is located above the liquid level of the raw liquid, and the non-submerged membrane operation is realized by spraying liquid directly to the membrane assembly through a nozzle arranged on the pipeline; a circulating pump and a plurality of liquid replenishment nozzles are arranged on the liquid replenishment pipeline, and the liquid replenishment nozzles directly spray liquid to the surface of the membrane assembly and perform online positive flushing on the membrane surface; the membrane assembly includes a plurality of membrane elements and a fixing structure thereof, the liquid outlet holes of the membrane elements are connected to the liquid inlet holes of the liquid collection system, the liquid production port of the liquid collection system is connected to the liquid outlet pipeline, and a liquid pump is arranged on the liquid outlet pipeline. The non-submerged membrane separation operation of the present invention can be applied to ultrafiltration or microfiltration equipment, and is convenient for positive flushing, backwashing and chemical cleaning; the raw liquid is raw water that needs to be filtered and purified or a liquid material that needs membrane separation.

Description

Technical Field

[0001] The invention belongs to the technical field of membrane separation and water treatment, and in particular relates to a non-submerged membrane separation device. Background Art

[0002] The membrane components of the membrane separation devices or equipment currently on the market are generally operated in an immersed manner, that is, the membrane components are immersed in the raw liquid, and the membrane separation operation is achieved through positive pressure filtration or negative pressure suction. In order to prevent the filter layer from being blocked and delay membrane pollution, the immersed membrane separation device can be operated by means of cross-flow circulation of raw liquid, dynamic rotation of membrane components, aeration flushing, etc. For example, the aeration flushing method is to set a perforated aeration tube under the membrane component, and the air-water two-phase flow formed by high-intensity aeration is used to hydraulically flush the membrane surface to eliminate the filter layer and delay membrane pollution. However, when the immersed membrane separation device is cleaning and maintaining the membrane component, it is necessary to drain the raw liquid in the membrane pool or take the membrane component out of the membrane pool as a whole, refill the liquid after cleaning or put it back into the raw liquid pool, and the operation and maintenance are complicated and time-consuming. In particular, in the immersed state, it is not conducive to achieving positive flushing, backwashing and chemical cleaning. Summary of the invention

[0003] The purpose of the present invention is to overcome the technical defects of the existing submerged membrane separation device and provide a new non-submerged membrane separation device, which has the advantage of facilitating online forward flushing, backwashing and chemical cleaning, greatly improving the membrane operation efficiency.

[0004] To achieve the above object, the technical solution adopted by the present invention is:

[0005] A non-submerged membrane separation device comprises a liquid inlet pipeline, a membrane assembly, a liquid replenishment pipeline, a liquid collection system, and a liquid outlet pipeline. The membrane assembly is located above the liquid level of the raw liquid, and liquid supply is directly sprayed to the membrane assembly by a nozzle arranged on the pipeline to realize non-submerged membrane operation. A circulation pump and a plurality of liquid replenishment nozzles are arranged on the liquid replenishment pipeline. The liquid replenishment nozzles spray liquid to the surface of the membrane assembly and perform online positive flushing on the membrane surface. The membrane assembly comprises a plurality of membrane elements and a fixing structure thereof. The liquid outlet holes of the membrane elements are connected to the liquid inlet holes of the liquid collection system, the liquid production port of the liquid collection system is connected to the liquid outlet pipeline, and a liquid pump is arranged on the liquid outlet pipeline.

[0006] Furthermore, it also includes a tank body or a pool body, the membrane assembly is arranged at the upper part of the tank body or the pool body, the lower part is used to store the raw material liquid, and the liquid inlet of the liquid replenishment pipeline is arranged at the lower part of the tank body. Furthermore, the liquid inlet pipeline is provided with a liquid inlet solenoid valve and / or a liquid inlet pump, the liquid inlet pipeline directly feeds water into the tank body and / or the liquid inlet pipeline is also provided with a plurality of liquid inlet nozzles, the liquid inlet nozzles directly spray the raw material liquid onto the surface of the membrane assembly.

[0007] Furthermore, the liquid inlet nozzle is a movable structure and / or the membrane assembly is a rotating structure. Furthermore, a liquid level gauge is provided in the tank body or the pool body, and a concentrate discharge pipeline is also provided at the lower part of the tank body or the pool body, and a concentrate discharge solenoid valve is provided on the concentrate discharge pipeline. Furthermore, it also includes an electronic control system, and the electronic control system is connected to the solenoid valve, the liquid inlet pump, the liquid suction pump, the circulation pump, and the liquid level gauge. Furthermore, the membrane assembly adopts a flat ultrafiltration membrane material or a microfiltration membrane material. Furthermore, the membrane element of the membrane assembly adopts one or more of a flat inorganic membrane, a flat organic membrane, a tubular inorganic membrane, a multi-channel inorganic membrane, a roll membrane or a hollow fiber membrane.

[0008] Furthermore, the raw material liquid is raw water that needs to be filtered and purified or a liquid material that needs membrane separation.

[0009] The beneficial effects of the present invention are:

[0010] 1. The membrane separation device of the present invention adopts a non-immersed operation mode, the membrane assembly is located above the liquid level of the raw material liquid, and the liquid is supplied in a spraying manner. While supplying the liquid, the membrane surface is also subjected to online positive flushing, which can significantly delay membrane pollution.

[0011] 2. The non-submerged membrane separation device of the present invention is easy to clean and maintain. There is no need to drain the raw liquid in the membrane pool or take the membrane component out of the membrane pool as a whole. After cleaning, it can be refilled with liquid or put back into the raw liquid pool, which can conveniently realize forward flushing, backwashing and chemical cleaning. The non-submerged online cleaning method has low drug consumption, short cleaning time and low cost, which greatly improves the membrane operation efficiency.

[0012] 3. The non-submerged membrane separation device adopts an integrated assembly structure with simple structure, flexible size design, convenient disassembly and assembly, firm and reliable, easy to clean and maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the technical description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0014] Figure 1 is a schematic structural diagram of a first embodiment of the present invention;

[0015] Figure 2 is a schematic structural diagram of a second embodiment of the present invention;

[0016] Figure 3 is a schematic structural diagram of a third embodiment of the present invention;

[0017] Figure 4is a schematic structural diagram of a fourth embodiment of the present invention;

[0018] Figure 5 It is a schematic diagram of the structure of the flat membrane element and the liquid collection system of the present invention;

[0019] Among them, 1-liquid inlet pipeline, 2-membrane assembly, 3-liquid replenishment pipeline, 4-liquid collection system, 5-liquid outlet pipeline, 6-tank body, 7-circulation pump, 8-liquid replenishment nozzle, 9-membrane element, 10-liquid outlet hole of membrane element, 11-liquid production port of liquid collection system, 12-liquid suction pump, 13-liquid inlet solenoid valve, 14-liquid inlet pump, 15-liquid inlet nozzle, 16-liquid inlet of liquid replenishment pipeline, 17-liquid level meter, 18-concentrate discharge pipeline, 19-concentrate discharge solenoid valve, 20-drive motor. Specific embodiments

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Embodiment 1

[0022] like Figure 1 , 5 As shown, this embodiment provides a non-submerged membrane separation device, including a liquid inlet pipeline 1, a membrane assembly 2, a liquid replenishment pipeline 3, a liquid collection system 4, and a liquid outlet pipeline 5. When working, the membrane assembly 2 is located above the liquid level of the raw liquid, and the membrane operation is realized by spraying liquid directly to the membrane assembly 2 through a liquid inlet nozzle 15 and a liquid replenishment nozzle 8 arranged on the pipeline; a circulating pump 7 and a plurality of liquid replenishment nozzles 8 are provided on the liquid replenishment pipeline 3, and the liquid replenishment nozzles 8 spray liquid to the surface of the membrane assembly 2; the membrane assembly 2 includes a plurality of membrane elements 9 and a fixing structure thereof, the membrane element 9 is a hollow cavity structure, the liquid outlet hole 10 of the membrane element is connected with the liquid inlet hole of the liquid collection system, the liquid production port 11 of the liquid collection system is connected with the liquid outlet pipeline 5 to form a liquid flow channel, and a liquid suction pump 12 is provided on the liquid outlet pipeline 5.

[0023] This embodiment further includes a tank body 6 , the membrane assembly 2 is arranged at the upper part of the tank body 6 , the lower part is used to store the raw material liquid, and the liquid inlet 16 of the liquid replenishing pipeline is arranged at the lower part of the tank body 6 .

[0024] In this embodiment, the liquid inlet pipeline 1 is provided with a liquid inlet solenoid valve 13 and / or a liquid inlet pump 14 , and is also provided with a plurality of liquid inlet nozzles 15 , and the liquid inlet nozzles 15 directly spray the raw material liquid onto the surface of the membrane assembly 2 .

[0025] The membrane assembly 2 of this embodiment is a rotary structure, and the membrane assembly 2 is driven by the driving motor 20 to rotate slowly, so that the spray liquid of the liquid inlet nozzle 15 and the liquid replenishment nozzle 8 can be fully in contact with the membrane assembly 2 to achieve omnidirectional liquid inflow.

[0026] In this embodiment, a liquid level meter 17 is provided in the tank body, and the opening and closing of the liquid inlet solenoid valve 13 and the circulation pump 7 are controlled by the feedback signal of the liquid level meter 17, so that the liquid level of the raw material liquid is always maintained below the membrane assembly 2, and the operation is non-immersed.

[0027] In this embodiment, a concentrated discharge pipeline 18 is provided at the lower part of the tank body, and a concentrated discharge solenoid valve 19 is provided on the concentrated discharge pipeline to discharge sewage regularly or continuously according to a set program.

[0028] The present embodiment further comprises an electric control system, which is connected to the electromagnetic valve 13, the liquid inlet pump 14, the liquid extraction pump 12, the circulation pump 7, the liquid level meter 17, and the drive motor 20 to achieve full automatic control.

[0029] Embodiment 2

[0030] like Figure 2 , 5 As shown, this embodiment provides a non-submerged membrane separation device, including a liquid inlet pipeline 1, a membrane assembly 2, a liquid replenishment pipeline 3, a liquid collection system 4, and a liquid outlet pipeline 5. When working, the membrane assembly 2 is located above the liquid level of the raw liquid, and the membrane operation is realized by spraying liquid directly to the membrane assembly 2 through a liquid inlet nozzle 15 and a liquid replenishment nozzle 8 arranged on the pipeline; a circulating pump 7 and a plurality of liquid replenishment nozzles 8 are provided on the liquid replenishment pipeline 3, and the liquid replenishment nozzles 8 spray liquid to the surface of the membrane assembly 2; the membrane assembly 2 includes a plurality of membrane elements 9 and a fixing structure thereof, the membrane element 9 is a hollow cavity structure, the liquid outlet hole 10 of the membrane element is connected with the liquid inlet hole of the liquid collection system, the liquid production port 11 of the liquid collection system is connected with the liquid outlet pipeline 5 to form a liquid flow channel, and a liquid suction pump 12 is provided on the liquid outlet pipeline 5.

[0031] This embodiment further includes a tank body 6 , the membrane assembly 2 is arranged at the upper part of the tank body 6 , the lower part is used to store the raw material liquid, and the liquid inlet 16 of the liquid replenishing pipeline is arranged at the lower part of the tank body 6 .

[0032] In this embodiment, the liquid inlet pipeline 1 is provided with a liquid inlet solenoid valve 13 and / or a liquid inlet pump 14 , and is also provided with a plurality of liquid inlet nozzles 15 , and the liquid inlet nozzles 15 directly spray the raw material liquid onto the surface of the membrane assembly 2 .

[0033] The liquid inlet nozzle 15 of this embodiment is a rotary structure. The rotary nozzle 15 rotates and sprays under the reaction of water pressure, so that the spraying water can fully contact the membrane assembly 2 to achieve omnidirectional water inflow.

[0034] In this embodiment, a liquid level meter 17 is provided in the tank body, and the opening and closing of the liquid inlet solenoid valve 13 and the circulation pump 7 are controlled by the feedback signal of the liquid level meter 17, so that the liquid level of the raw material liquid is always maintained below the membrane assembly 2, and the operation is non-immersed.

[0035] In this embodiment, a concentrated discharge pipeline 18 is provided at the lower part of the tank body, and a concentrated discharge solenoid valve 19 is provided on the concentrated discharge pipeline to discharge sewage regularly or continuously according to a set program.

[0036] The present embodiment further comprises an electric control system, which is connected to the electromagnetic valve 13, the liquid inlet pump 14, the liquid extraction pump 12, the circulation pump 7, the liquid level meter 17, and the drive motor 20 to achieve full automatic control.

[0037] Embodiment 3

[0038] like Figure 3 , 5 As shown, this embodiment provides a non-submerged membrane separation device, including a liquid inlet pipeline 1, a membrane assembly 2, a liquid replenishment pipeline 3, a liquid collection system 4, and a liquid outlet pipeline 5. When working, the membrane assembly 2 is located above the liquid level of the raw liquid, and the membrane operation is realized by spraying liquid directly to the membrane assembly 2 through a liquid inlet nozzle 15 and a liquid replenishment nozzle 8 arranged on the pipeline; a circulating pump 7 and a plurality of liquid replenishment nozzles 8 are provided on the liquid replenishment pipeline 3, and the liquid replenishment nozzles 8 spray liquid to the surface of the membrane assembly 2; the membrane assembly 2 includes a plurality of membrane elements 9 and a fixing structure thereof, the membrane element 9 is a hollow cavity structure, the liquid outlet hole 10 of the membrane element is connected with the liquid inlet hole of the liquid collection system, the liquid production port 11 of the liquid collection system is connected with the liquid outlet pipeline 5 to form a liquid flow channel, and a liquid suction pump 12 is provided on the liquid outlet pipeline 5.

[0039] This embodiment further includes a tank body 6 , the membrane assembly 2 is arranged at the upper part of the tank body 6 , the lower part is used to store the raw material liquid, and the liquid inlet 16 of the liquid replenishing pipeline is arranged at the lower part of the tank body 6 .

[0040] In this embodiment, the liquid inlet pipeline 1 is provided with a liquid inlet solenoid valve 13 and / or a liquid inlet pump 14 , and is also provided with a plurality of liquid inlet nozzles 15 , and the liquid inlet nozzles 15 directly spray the raw material liquid onto the surface of the membrane assembly 2 .

[0041] The liquid inlet nozzle 15 of this embodiment is a movable structure. The liquid inlet nozzle 15 reciprocates above the membrane assembly 2 according to a set trajectory to spray the membrane assembly with water, so that the water can fully contact the membrane assembly 2 to achieve omnidirectional water inflow.

[0042] In this embodiment, a liquid level meter 17 is provided in the tank body, and the opening and closing of the liquid inlet solenoid valve 13 and the circulation pump 7 are controlled by the feedback signal of the liquid level meter 17, so that the liquid level of the raw material liquid is always maintained below the membrane assembly 2, and the operation is non-immersed.

[0043] In this embodiment, a concentrated discharge pipeline 18 is provided at the lower part of the tank body, and a concentrated discharge solenoid valve 19 is provided on the concentrated discharge pipeline to discharge sewage regularly or continuously according to a set program.

[0044] The present embodiment further comprises an electric control system, which is connected to the electromagnetic valve 13, the liquid inlet pump 14, the liquid extraction pump 12, the circulation pump 7, the liquid level meter 17, and the drive motor 20 to achieve full automatic control.

[0045] Embodiment 4

[0046] like Figure 4 , 5 As shown, this embodiment provides a non-submerged membrane separation device, including a liquid inlet pipeline 1, a membrane assembly 2, a liquid replenishment pipeline 3, a liquid collection system 4, and a liquid outlet pipeline 5. When working, the membrane assembly 2 is located above the liquid level of the raw liquid, and the liquid replenishment nozzle 8 arranged on the liquid replenishment pipeline 3 is directly sprayed to the membrane assembly 2 to supply liquid to realize membrane operation; the liquid replenishment pipeline 3 is provided with a circulation pump 7 and a plurality of liquid replenishment nozzles 8, and the liquid replenishment nozzles 8 spray liquid to the surface of the membrane assembly 2; the membrane assembly 2 includes a plurality of membrane elements 9 and a fixing structure thereof, the membrane element 9 is a hollow cavity structure, the liquid outlet hole 10 of the membrane element is connected with the liquid inlet hole of the liquid collection system, the liquid production port 11 of the liquid collection system is connected with the liquid outlet pipeline 5 to form a liquid flow channel, and the liquid outlet pipeline 5 is provided with a liquid suction pump 12.

[0047] This embodiment further includes a tank body 6 , the membrane assembly 2 is arranged at the upper part of the tank body 6 , the lower part is used to store the raw material liquid, and the liquid inlet 16 of the liquid replenishing pipeline is arranged at the lower part of the tank body 6 .

[0048] In this embodiment, a liquid inlet solenoid valve 13 and / or a liquid inlet pump 14 are provided on the liquid inlet pipeline 1, and a liquid inlet nozzle is omitted from the liquid inlet pipeline, and water is directly introduced into the equipment tank body 6.

[0049] In this embodiment, a liquid level meter 17 is provided in the tank body, and the feedback signal of the liquid level meter 17 is used to control the opening and closing of the liquid inlet solenoid valve 13 and the circulation pump 7, so that the liquid level of the raw material liquid is always maintained below the membrane assembly 2, and the operation is non-immersed.

[0050] In this embodiment, a concentrated discharge pipeline 18 is provided at the lower part of the tank body, and a concentrated discharge solenoid valve 19 is provided on the concentrated discharge pipeline to discharge sewage regularly or continuously according to a set program.

[0051] The present embodiment further comprises an electric control system, which is connected to the electromagnetic valve 13, the liquid inlet pump 14, the liquid extraction pump 12, the circulation pump 7, the liquid level meter 17, and the drive motor 20 to achieve full automatic control.

[0052] In this embodiment, a liquid level meter 17 is provided in the tank body, and the feedback signal of the liquid level meter 17 is used to control the opening and closing of the liquid inlet solenoid valve 13 and the circulation pump 7, so that the liquid level of the raw material liquid is always maintained below the membrane assembly 2, and the operation is non-immersed.

[0053] In this embodiment, a concentrated discharge pipeline 18 is provided at the lower part of the tank body, and a concentrated discharge solenoid valve 19 is provided on the concentrated discharge pipeline to discharge sewage regularly or continuously according to a set program.

[0054] The present embodiment further comprises an electric control system, which is connected to the electromagnetic valve 13, the liquid inlet pump 14, the liquid extraction pump 12, the circulation pump 7, the liquid level meter 17, and the drive motor 20 to achieve full automatic control.

[0055] The working process of the non-submerged membrane separation device is as follows:

[0056] When the equipment is running, the raw liquid enters from the water inlet pipeline 1, is sprayed onto the surface of the membrane assembly 2 through the liquid inlet nozzle 15, and enters the hollow cavity of the membrane element from the membrane surface under the suction action of the liquid pump 12, and converges to the liquid outlet hole 10 of the membrane element. The liquid outlet is connected to the liquid inlet hole of the liquid collection system, and the liquid production port 11 of the liquid collection system is connected to the liquid outlet pipeline 5 to form a liquid flow channel. The filtrate is discharged from the water outlet pipe 5 by the liquid pump 12; the raw liquid that is not discharged by the liquid pump 12 is retained in the equipment. At the bottom of the tank body 6, when the liquid level reaches the set low liquid level, the circulating pump 7 is turned on, and the circulating pump 7 drives the raw material liquid at the bottom of the tank body 6 into the liquid replenishment pipeline 3, and the liquid replenishment nozzle 8 sprays the membrane assembly 2 with liquid replenishment, and the liquid replenishment nozzle 8 cooperates with the liquid inlet nozzle 15 to supply liquid to the membrane assembly 2; the liquid level in the tank body 6 controls the opening and closing of the liquid inlet solenoid valve 13 and the circulating pump 7 through the feedback signal of the liquid level meter 17, so that the liquid level is always kept below the membrane assembly 2, and the non-immersed operation. The concentrated discharge solenoid valve 19 opens and closes according to the set time, and discharges sewage regularly or continuously.

[0057] The non-submerged membrane separation device of the present invention performs online positive flushing on the membrane surface while supplying liquid in a spraying manner, which can significantly delay membrane pollution; the membrane component is non-submerged in operation, which can conveniently achieve positive flushing, backwashing and chemical cleaning; the non-submerged online cleaning method has low drug consumption, short cleaning time and low cost, which greatly improves the membrane operation efficiency.

[0058] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A non-submerged membrane separation device, comprising a liquid inlet pipeline (1), a membrane assembly (2), a liquid replenishment pipeline (3), a liquid collection system (4), and a liquid outlet pipeline (5), characterized in that: The membrane assembly (2) is located above the liquid level of the raw material liquid, and liquid is directly sprayed onto the membrane assembly (2) through a nozzle arranged on the pipeline to realize non-submerged membrane operation; the liquid replenishment pipeline (3) is provided with a circulation pump (7) and a plurality of liquid replenishment nozzles (8), and the liquid replenishment nozzles (8) spray liquid onto the surface of the membrane assembly (2) and perform online positive flushing on the membrane surface; the membrane assembly (2) includes a plurality of membrane elements (9) and a fixing structure thereof, the liquid outlet holes (10) of the membrane elements are connected to the liquid inlet holes of the liquid collection system, the liquid production port (11) of the liquid collection system is connected to the liquid outlet pipeline (5), and the liquid outlet pipeline (5) is provided with a liquid pump (12).

2. The non-submerged membrane separation device according to claim 1, characterized in that: It also comprises a tank body (6) or a pool body, the membrane assembly (2) being arranged at the upper part of the tank body (6) or the pool body, the lower part being used for storing raw material liquid, and the liquid inlet (16) of the liquid replenishing pipeline being arranged at the lower part of the tank body (6) or the pool body.

3. The non-submerged membrane separation device according to claim 1, characterized in that: The liquid inlet pipeline (1) is provided with a liquid inlet solenoid valve (13) and / or a liquid inlet pump (14), the liquid inlet pipeline (1) directly inlets water into the tank body (6) and / or the liquid inlet pipeline (1) is also provided with a plurality of liquid inlet nozzles (15), the liquid inlet nozzles (15) directly spray the raw material liquid onto the surface of the membrane assembly (2).

4. The non-submerged membrane separation device according to claim 1 or 3, characterized in that: The liquid inlet nozzle (15) on the liquid inlet pipeline (1) is a movable structure and / or the membrane assembly (2) is a rotating structure.

5. The non-submerged membrane separation device according to claim 2, characterized in that: A liquid level meter (17) is provided in the tank body (6) or the pool body, and a concentrate discharge pipeline (18) is also provided at the lower part of the tank body or the pool body, and a concentrate discharge solenoid valve (19) is provided on the concentrate discharge pipeline.

6. The non-submerged membrane separation device according to any one of claims 1 to 3, characterized in that: The utility model also comprises an electric control system, wherein the electric control system is connected with the electromagnetic valve, the liquid inlet pump, the liquid extraction pump, the circulation pump and the liquid level meter.

7. The non-submerged membrane separation device according to claim 1, characterized in that: The membrane component (2) adopts a flat-plate ultrafiltration membrane material or a microfiltration membrane material.

8. The non-submerged membrane separation device according to claim 1, characterized in that: The membrane element (9) of the membrane assembly (2) is one or more of a flat inorganic membrane, a flat organic membrane, a tubular inorganic membrane, a multi-channel inorganic membrane, a rolled membrane, and a hollow fiber membrane.

9. A non-submerged membrane separation device according to any one of claims 1 to 3, characterized in that: The raw material liquid is raw water that needs to be filtered and purified or liquid material that needs membrane separation.

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