WO2020199458A1

WO2020199458A1 - Anti-scaling electroosmosis electrode plate device

Info

Publication number: WO2020199458A1
Application number: PCT/CN2019/101528
Authority: WO
Inventors: 王子羲; 李树强; 周银河; 郭越红
Original assignee: 清华大学
Priority date: 2019-04-01
Filing date: 2019-08-20
Publication date: 2020-10-08
Also published as: CN110117151B; CN110117151A

Abstract

Provided is an anti-scaling electroosmosis electrode plate device, used in the sewage treatment industry. The device comprises a control cabinet (1), a plate-and-frame filter press (2), a travelling rack (3), a guide rail (4), a frictional vibration system (5), a power source (6), an anode plate (7), and a cathode plate (8), wherein the frictional vibration system (5) is composed of an electric motor (501), a transmission shaft (502), a self-rotation head (503), a friction disc (504) and a folding structure (505). The device is applied to the industry involving the treatment of biological sewage by means of electroosmosis, and can effectively solve the problems of a mud cake having an increased moisture content, and a reduced working efficiency, which are caused by an increased resistance after limescale occurs on a cathode plate.

Description

Anti-scaling electro-osmosis electrode plate device

Technical field

This application relates to the sewage treatment industry, in particular to an anti-scaling electro-osmosis electrode plate device.

Background technique

At present, the process of sewage treatment plants in cities and towns in my country is still based on activated sludge and biological methods. In the process of sewage treatment at various levels, it is necessary to treat harmful substances such as bacteria and various parasite eggs. In sewage treatment, the main water of sewage is mainly divided into capillary water, interstitial water, surface adhesion water and internal water.

The pure mechanical dehydration method can mainly remove capillary water and interstitial water, and the remaining water needs to be removed by consuming heat or by further physical, chemical, biological and other methods. Therefore, even after mechanical dehydration, the volume of sludge is still large because it still contains a lot of water. Therefore, it is necessary to find some reasonable and effective dewatering methods to remove the remaining moisture in the sludge, so as to reduce the volume of the sludge as much as possible, so as to reduce the cost for the subsequent treatment, transportation, and discharge of the sludge.

Electro-osmosis dehydration technology is a method that uses an external DC electric field to enhance the dehydration performance of materials. It was first used in in-situ soil remediation, mainly to remove organic pollutants and heavy metal substances in the soil. Due to the good dewatering performance of electroosmosis technology, more and more researchers have applied it to sludge dewatering in recent years to achieve the purpose of deep dewatering of sludge.

However, in the electro-osmosis dehydration process, the sludge is heated and the cathode is alkaline, which will cause fouling on one side of the cathode net, which directly leads to an increase in electrical resistance, a significant decrease in work efficiency and poor filtration performance. Happening. In actual use, a cleaning and descaling process may be required for 1 to 3 days.

Summary of the invention

In order to overcome the above technical defects, this application provides an anti-scaling electro-osmosis electrode plate device, which fundamentally solves the problem of fouling of the cathode plate in the electro-osmosis industry.

The specific composition and principle of the program are:

An anti-scaling electro-osmosis electrode plate device includes a control cabinet, a plate and frame filter press, a walking frame, a guide rail, a friction vibration system, a power supply, an anode plate, and a cathode plate. Among them, the friction vibration system is composed of a motor, a transmission shaft, a rotation head, a friction disc and a folding structure.

This application uses the friction vibration between the friction vibration system and the cathode plate to remove the scale on the cathode plate, that is, as shown in Figure 1, during the working process of the electro-osmosis plate and frame filter press, the cathode mesh can be observed every time the plate is desludged. The fouling condition or the water content of the mud cake after desliming under the actual working conditions of the plate and frame filter press determines the fouling condition of the cathode plate. When it is determined that the scale needs to be cleaned up, the control cabinet controls the friction vibration system to move to a suitable position on the walking frame, the folding structure turns the friction plate 90° to contact the front of the cathode mesh, and starts the rotation head and the cathode mesh to rub for about 10 seconds. Remove the solid dirt of the cathode mesh. After cleaning the first piece, the folding structure turns the friction plate up and moves to the next plate frame, and again turns the friction plate 90° to contact with the front of the cathode net to start the rotation head to drive the friction plate and the cathode plate to rub against to achieve the function of descaling. A descaling work requires multiple cycles of the above steps to complete the descaling work of the cathode plate of the electroosmotic plate and frame filter press.

The beneficial effect of the application is that the application can solve the problem of scaling of the cathode plate and cathode mesh during the working process of the electro-osmotic plate and frame filter press, effectively reducing the working resistance and increasing the solid content of the mud cake.

Description of the drawings

Figure 1 A schematic diagram of an anti-scaling electro-osmosis electrode plate device

Figure 2 Structure diagram of friction vibration system

detailed description

The application will be further explained below in conjunction with the drawings:

Figure 1 shows a schematic diagram of an anti-scaling electroosmotic electrode plate device. As shown in the figure, the device includes: control cabinet 1, plate and frame filter press 2, walking frame 3, guide rail 4, friction vibration system 5 , Power 6, anode plate 7, cathode plate 8. The friction vibration system 5 is composed of a motor 501, a transmission shaft 502, a rotating head 503, a friction disc 504 and a folding structure 505.

The specific implementation steps are as follows:

This application uses the friction vibration between the friction vibration system and the cathode plate to remove the scale on the cathode plate, that is, as shown in Figure 1, during the working process of the electro-osmosis plate and frame filter press, the cathode mesh can be observed every time the plate is desludged. Fouling condition or according to the actual working conditions of the plate and frame filter press to determine the condition of the cathode plate fouling. When it is determined that the scale needs to be cleaned up, the control cabinet controls the friction vibration system to move to a suitable position on the walking frame, the folding structure turns the friction plate 90° to contact the front of the cathode mesh, and starts the rotation head and the cathode mesh to rub for about 10 seconds. Complete the action of removing solid dirt on the cathode mesh. After cleaning the first piece, the folding structure turns the friction plate up and moves to the next plate frame, and again turns the friction plate 90° to contact with the front of the cathode net to start the rotation head to drive the friction plate and the cathode plate to rub against to achieve the function of descaling. A descaling work requires multiple cycles of the above steps to complete the descaling work of the cathode plate of the electroosmotic plate and frame filter press.

Combined with the working principle of the plate and frame filter press, the optimal process is as follows:

The plate and frame filter press feeds, maintains pressure (direct current), unloads the mud cake, and circulates the descaling to complete the descaling of each cathode plate.

The above-mentioned specific implementations are used to explain the method and core idea of the application, but not to limit the application. For those skilled in the technical field, without departing from the principles of this application, any modifications and changes made to this application fall within the protection scope of this application.

Claims

An anti-scaling electro-osmosis electrode plate device, characterized in that the anti-scaling electro-osmosis electrode plate device includes: a control cabinet (1), a plate and frame filter press (2), a walking frame (3), Guide rail (4), friction vibration system (5), power supply (6), anode plate (7), cathode plate (8).
The anti-scaling electroosmotic electrode plate device according to claim 1, wherein the friction vibration system (5) consists of a motor (501), a transmission shaft (502), a rotating head (503), Friction disc (504) and folding mechanism (505).
The anti-scaling electroosmotic electrode plate device according to claim 2, characterized in that: the friction disc (504) is driven by the rotating head (503).
The anti-scaling electro-osmosis electrode plate device according to claim 1, wherein the friction vibration system (5) moves back and forth on the walking frame (3) by the guide rail (4).
The anti-scaling electro-osmosis electrode plate device according to claim 2, characterized in that the folding mechanism (505) can complete a positive and negative rotation of 0-90° in a radial direction.