WO2020252840A1

WO2020252840A1 - Composite filtering assembly and sewage treatment apparatus

Info

Publication number: WO2020252840A1
Application number: PCT/CN2019/096708
Authority: WO
Inventors: 华河林; 毛旭辉; 曾香; 胡茂华
Original assignee: 中山朗清膜业有限公司
Priority date: 2019-06-19
Filing date: 2019-07-19
Publication date: 2020-12-24
Also published as: CN110204115A

Abstract

Disclosed is a composite filtering assembly, comprising: a frame (1); several hollow fiber membrane modules (2) for filtering sewage, wherein the hollow fiber membrane modules (2) are located inside the frame (1); and an electrolysis assembly mounted on the frame (1) and used for performing an electrolytic treatment on sewage inside the frame (1). Further disclosed is a sewage treatment apparatus, comprising the composite filtering assembly. The composite filtering assembly uses the electrolysis assembly to generate an electric field, such that cations and anions can move directionally, thereby avoiding deposition on the hollow fiber membrane modules (2). Bubbles generated by electrolysis facilitate the removal of sludge attached to the hollow fiber membrane modules (2), and the presence of the electric field facilitates improvement of the cleaning effect on the hollow fiber membrane modules (2).

Description

Composite filter component and sewage treatment equipment To

Technical field

The invention relates to the technical field of sewage treatment, in particular to a sewage treatment equipment with a composite filter assembly.

Background technique

There are many existing sewage treatment methods, but none of them is perfect. For example, the commonly used MBR membrane biological reaction treatment method has the advantages of large biomass, high treatment efficiency, and less residual sludge. But at the same time, there is also easy to form membrane pollution. Suspended pollutants in the mixed solution, dissolved organic matter, microbial deposition on the surface of the membrane, as well as fibers and debris in the activated sludge, will reduce the membrane permeability to varying degrees. Further, the membrane needs to be cleaned or replaced frequently, and the operation and maintenance cost is high, which is not conducive to popularization and application. Therefore, the present invention provides a composite filter assembly sewage treatment equipment to solve the above problems.

Summary of the invention

The purpose of the present invention is to solve at least one of the technical problems existing in the prior art, and to provide a composite filter assembly sewage treatment equipment that can Effectively reduce the frequency of membrane cleaning or replacement.

According to the first aspect of the present invention, there is provided a composite filter assembly, including:

frame;

Several hollow fiber membrane groups are used to filter sewage, and the hollow fiber membrane groups are located in the frame;

Electrolysis components, installed on the frame, are used to electrolyze the sewage in the frame.

Preferably, the electrolysis assembly includes an anode and a cathode, the cathode is installed on the outer side wall of the frame, and the anode is installed inside the frame.

Preferably, the cathode has a plate shape, the cathode covers the side wall of the frame, and the anode has a rod shape.

Preferably, the number of anodes is six, evenly distributed inside the frame.

Preferably, the cathode is made of stainless steel, and a plurality of through holes are provided on the cathode.

Preferably, the diameter of the through hole is 1mm-5mm.

Preferably, the hollow fiber membrane group includes an upper connecting rod, a hollow fiber membrane, and a lower connecting rod. The two ends of the hollow fiber membrane are respectively connected to the upper connecting rod and the lower connecting rod. The upper connecting rod or/and the lower connecting rod A first water collection channel is provided, and the first water collection channel communicates with the inside of the hollow fiber membrane.

Preferably, the hollow fiber membrane group further includes a water collection pipe, and a second water collection channel is arranged inside the water collection pipe, the first water collection channel is in communication with the second water collection channel, and the second water collection channel has an output interface.

Preferably, the present invention further includes an aeration pipe installed on the frame, the aeration pipe includes a working section, the working section is located at the lower part of the frame, and a plurality of exhaust holes are provided on the working section .

According to a second aspect of the present invention, there is provided a sewage treatment equipment including any of the above-mentioned composite filter components.

Any of the above technical solutions has at least the following beneficial technical effects:

1. The hollow fiber membrane group is used for sewage treatment, with high treatment efficiency and little residual sludge, which can reduce the volume of equipment and the transportation of sludge;

2. The active oxidation free radicals generated by the anode in the electrolytic component can play a role of sterilization, thereby improving the quality of the effluent;

3. The voltage applied by the electrolysis component to the sewage can make the anions and cations move directionally in the presence of an electric field, avoiding deposition on the hollow fiber membrane group, causing fouling and reducing sewage treatment efficiency;

4. The bubbles produced by electrolysis are beneficial to the removal of the sludge attached to the hollow fiber membrane group, restore the membrane flux in time, and improve the performance stability of the system;

5. When adding regenerative agents such as NaCl, the presence of an electric field can generate hypochlorous acid, which can reduce the addition of oxidizing agents for offline cleaning, and the electric field is beneficial to improve the cleaning effect of the hollow fiber membrane group, and reduces the operation and maintenance cost and difficulty.

Description of the drawings

The present invention will be further described below in conjunction with the drawings and embodiments;

Fig. 1 is a schematic diagram of an embodiment of a composite filter assembly;

Figure 2 is a schematic diagram of a composite filter assembly after the cathode is hidden;

Figure 3 is a comparison diagram of membrane flux between the present invention and the existing commonly used MBR membrane biological reaction treatment.

Detailed ways

This section will describe the specific embodiments of the present invention in detail. The preferred embodiments of the present invention are shown in the drawings. The function of the drawings is to supplement the description of the text part of the manual with graphics, so that people can intuitively and vividly understand the text. Each technical feature and overall technical solution of the invention cannot be understood as a limitation on the protection scope of the present invention.

In the description of the present invention, it should be understood that the orientation description involved, for example, the orientation or positional relationship indicated by up, down, front, back, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and only In order to facilitate the description of the present invention and simplify the description, it does not indicate or imply that the pointed device or element must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

In the description of the present invention, several meanings are one or more, multiple meanings are two or more, greater than, less than, exceeding, etc. are understood to not include the number, and above, below, and within are understood to include the number. If it is described that the first and second are only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly specifying the number of the indicated technical features or implicitly specifying the order of the indicated technical features relationship.

In the description of the present invention, unless otherwise clearly defined, terms such as setting, installation, and connection should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meaning of the above terms in the present invention in combination with the specific content of the technical solution.

Referring to Figures 1 to 3, a composite filter assembly includes:

Frame 1, which is rectangular parallelepiped;

Several hollow fiber membrane groups 2 are used to filter sewage, and the hollow fiber membrane groups are located in the frame 1;

The electrolysis component is installed on the frame 1 and is used to electrolyze the sewage in the frame 1. The electrolysis component can generate a stable electric field in the frame.

The above technical solutions have at least the following beneficial technical effects:

In some embodiments, the frame 1 may be configured in a cylindrical shape or other shapes.

As shown in Figures 1 and 2, in some embodiments, the electrolysis assembly includes an anode 4 and a cathode 5. The cathode 5 is installed on the outer side wall of the frame 1, and the anode 4 is installed inside the frame 1; A stable electric field is formed, and the anions and cations move in a directional direction to avoid deposition on the hollow fiber membrane group and improve the service life of the hollow fiber membrane group 2.

As shown in Figure 1, in some embodiments, the cathode 5 is in the shape of a plate, the cathode 5 covers the side wall of the frame 1, the top and bottom of the frame 1 are unobstructed, and the anode 4 is in the shape of a rod; A uniform electric field is generated inside to improve the service life of the hollow fiber membrane group; preferably, the number of anodes 4 is six, which are evenly distributed inside the frame 1. The user can choose different numbers of anodes 4 according to the size of the frame 1 to achieve Ideal electric field effect. Preferably, the cathode 5 is made of stainless steel, and the cathode 5 is provided with a number of through holes. The cathode 5 with such a structure has low manufacturing cost and extremely high production efficiency; preferably, the diameter of the through hole is 1mm-5mm; so the cathode 5 can perform The auxiliary function of isolating bulk impurities.

As shown in Figure 2, in some embodiments, the hollow fiber membrane group 2 adopts a submerged filter membrane group. The hollow fiber membrane group includes an upper connecting rod 6, a hollow fiber membrane 7 and a lower connecting rod 8, and two hollow fiber membranes 7 The ends are respectively connected to the upper connecting rod 6 and the lower connecting rod 8. The upper connecting rod 6 is provided with a first water collecting channel, which communicates with the hollow fiber membrane 7; the hollow fiber membrane group 2 also includes a water collecting pipe 9 , The water collection pipe 9 is provided with a second water collection channel, the first water collection channel is in communication with the second water collection channel, and the second water collection channel has an output interface 10. The specific working process of the hollow fiber membrane group with the above structure is as follows. The hollow fiber membrane group 2 is immersed in sewage. The sewage flows into the hollow fiber membrane 7 after being filtered by the hollow fiber membrane 7, and then is collected into the first water collection channel. The water in the first water collection channel is then collected into the second water collection channel, and flows through the output interface 10 on the second water collection channel to the next treatment process; the hollow fiber membrane 7 passes through hundreds to thousands of hollow fiber membrane filaments Composition; the water collection pipe 9 is preferably arranged in a U shape, so that the upper connecting rod 6 can be located inside the water collecting pipe 9, and both ends of the upper connecting rod 6 are connected with the water collecting pipe 9 to facilitate water collection.

Of course, the first water collecting channel may not be provided in the upper connecting rod 6, and the first water collecting channel may be provided in the lower connecting rod 8, or the first water collecting channel may be provided in both the upper connecting rod 6 and the lower connecting rod 8. The same technical effect can be achieved.

Preferably, the present invention further includes an aeration pipe 11 installed on the frame 1. The aeration pipe 11 includes a working section 3 located at the lower part of the frame 1, and the working section 3 is provided with a number of exhaust holes , The air is blown into the aeration pipe 11 through a fan, and the wind is discharged from the exhaust hole on the working section 3. The generated air bubbles facilitate the removal of the sludge attached to the hollow fiber membrane group, restore the membrane flux in time, and improve the performance of the system stability.

2. The active oxidation free radicals generated by the anode 4 in the electrolytic assembly can play a role of sterilization, thereby improving the quality of the effluent;

The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above-mentioned embodiments. Within the scope of knowledge possessed by those of ordinary skill in the technical field, various implementations can be made without departing from the purpose of the present invention. Kind of change.

Claims

A composite filter assembly, characterized in that it comprises:

frame;

Several hollow fiber membrane groups are used to filter sewage, and the hollow fiber membrane groups are located in the frame;

The electrolysis assembly is installed on the frame and used for electrolytic treatment of sewage in the frame.
The composite filter assembly of claim 1, wherein the electrolysis assembly includes an anode and a cathode, the cathode is installed on the outer side wall of the frame, and the anode is installed inside the frame.
The composite filter assembly of claim 2, wherein the cathode is in the shape of a plate, the cathode covers the side wall of the frame, and the anode is in the shape of a rod.
The composite filter assembly of claim 3, wherein the number of anodes is six, which are evenly distributed inside the frame.
The composite filter assembly of claim 3, wherein the cathode is made of stainless steel, and a plurality of through holes are provided on the cathode.
The composite filter assembly according to claim 5, wherein the diameter of the through hole is 1mm-5mm.
The composite filter assembly according to claim 1, wherein the hollow fiber membrane group includes an upper connecting rod, a hollow fiber membrane and a lower connecting rod, and both ends of the hollow fiber membrane are connected to the upper connecting rod and The lower connecting rod is connected, the upper connecting rod or/and the lower connecting rod are provided with a first water collecting channel, and the first water collecting channel is communicated with the inside of the hollow fiber membrane.
A composite filter assembly according to claim 7, wherein the hollow fiber membrane group further comprises a water collecting pipe, and a second water collecting channel is arranged inside the water collecting pipe, and the first water collecting channel is connected to the The second water collection channel is in communication, and the second water collection channel has an output interface.
The composite filter assembly according to claim 1, characterized in that it further comprises an aeration pipe, the aeration pipe is installed on the frame, the aeration pipe includes a working section, and the working section is located In the lower part of the frame, a number of exhaust holes are provided on the working section.
A sewage treatment equipment, characterized by comprising the composite filter assembly according to any one of claims 1-9.