CN110117151B

CN110117151B - Anti-scaling electroosmosis electrode plate device

Info

Publication number: CN110117151B
Application number: CN201910258820.3A
Authority: CN
Inventors: 王子羲; 李树强; 周银河; 郭越红
Original assignee: Tsinghua University
Current assignee: Tsinghua University
Priority date: 2019-04-01
Filing date: 2019-04-01
Publication date: 2021-03-26
Anticipated expiration: 2039-04-01
Also published as: CN110117151A; WO2020199458A1

Abstract

The invention aims to provide an anti-scaling electroosmosis electrode plate device which is used for the sewage treatment industry. Comprises a control cabinet 1, a plate-and-frame filter press 2, a walking frame 3, a guide rail 4, a friction vibration system 5, a power supply 6, an anode plate 7 and a cathode plate 8. Wherein 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 invention is applied to the electroosmosis biological sewage treatment industry, and can effectively solve the problems of increased resistance, increased water content of mud cakes and reduced working efficiency after scale is generated on the negative plate.

Description

Anti-scaling electroosmosis electrode plate device

Technical Field

The invention relates to the sewage treatment industry, in particular to an anti-scaling electroosmosis electrode plate device.

Background

At present, the process of sewage treatment plants in various cities and towns in China still mainly adopts activated sludge and a biological method, and harmful substances containing bacteria, various parasitic ova and the like need to be treated in the treatment process of each level of sewage. In sewage treatment, the main water of sewage is mainly divided into capillary water, interstitial water, surface attached water and internal water.

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

The electroosmosis dehydration technology is a method for enhancing the dehydration performance of materials by using an external direct current electric field. The method is applied to in-situ remediation of soil, and is mainly used for removing organic pollutants and heavy metal substances in the soil. Because of its good dewatering performance, the electroosmosis technique has been used in sludge dewatering by more and more researchers in recent years to achieve deep dewatering of sludge.

However, in the electroosmosis dehydration process, the sludge is heated, the cathode becomes alkaline, and then scaling occurs on one side of the cathode net, so that the resistance is directly increased, the working efficiency is obviously reduced, and the filtering performance is deteriorated. In the actual use process, a cleaning and descaling process can be needed for 1-3 days.

Disclosure of Invention

In order to overcome the technical defects, the invention provides an anti-scaling electroosmosis electrode plate device, which fundamentally solves the scaling problem of a cathode plate in the electroosmosis industry.

The scheme comprises the following specific components in percentage by weight:

an anti-scaling electroosmosis electrode plate device comprises 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. The friction vibration system consists of a motor, a transmission shaft, a rotating head, a friction disc and a folding structure.

The invention utilizes the friction between the friction vibration system and the friction vibration of the cathode plate to remove the scale on the cathode plate, namely, in the working process of the electro-osmosis plate-and-frame filter press as shown in figure 1, the scaling condition of the cathode net can be observed after the plate is opened and desliming every time or the scaling condition of the cathode plate can be determined according to the water content of a mud cake after desliming under the actual working condition of the plate-and-frame filter press. When the scale is determined to be required to be cleaned, the control cabinet controls the friction system to move to a proper position on the walking rack, the folding structure turns the friction disc for 90 degrees to be in contact with the front surface of the cathode net, and the self-turning head and the cathode net are started to rub for about 10 seconds, so that the solid dirt of the cathode net can be removed. After the first piece is cleaned, the friction disc is turned upwards and moved to the next plate frame by the folding structure, and the friction disc is turned for 90 degrees to be in contact with the front surface of the cathode net again to start the rotation belt to drive the friction disc to rub with the cathode plate so as to realize a descaling function. The descaling operation of the cathode plate of the electro-osmosis plate-and-frame filter press needs to be completed by circulating the steps for multiple times in one descaling operation.

The invention has the beneficial effects that: the invention can solve the problem of scaling of the cathode plate cathode mesh in the working process of the electroosmosis plate-and-frame filter press, effectively reduces the working resistance and improves the solid content of mud cakes.

Drawings

FIG. 1 is a schematic view of an anti-scaling electroosmosis electrode plate device

FIG. 2 structural view of a frictional vibration system

Detailed Description

The invention is further described below with reference to the accompanying drawings:

fig. 1 is a schematic view of an anti-scaling electroosmotic electrode plate device, which, as shown in the figure, comprises: the device comprises a control cabinet 1, a plate-and-frame filter press 2, a walking frame 3, a guide rail 4, a friction vibration system 5, a power supply 6, an anode plate 7 and a cathode plate 8. Wherein 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:

the invention utilizes the friction between the friction vibration system and the friction vibration of the cathode plate to remove the scale on the cathode plate, namely, in the working process of the electro-osmosis plate-and-frame filter press as shown in figure 1, the scaling condition of the cathode net can be observed after the plate is opened and desliming every time or the scaling condition of the cathode plate can be determined according to the desliming water content under the actual working condition of the plate-and-frame filter press. When the scale is determined to be required to be cleaned, the control cabinet controls the friction system to move to a proper position on the walking rack, the folding structure turns the friction disc for 90 degrees to be in contact with the front surface of the cathode net, and the self-turning head and the cathode net are started to rub for about 10 seconds, so that the action of removing the solid dirt of the cathode net can be completed. After the first piece is cleaned, the friction disc is turned upwards and moved to the next plate frame by the folding structure, and the friction disc is turned for 90 degrees to be in contact with the front surface of the cathode net again to start the rotation belt to drive the friction disc to rub with the cathode plate so as to realize a descaling function. The descaling operation of the cathode plate of the electro-osmosis plate-and-frame filter press needs to be completed by circulating the steps for multiple times in one descaling operation.

The optimal process flow is as follows by combining the working principle of the plate-and-frame filter press:

feeding the plate-and-frame filter press, maintaining pressure (electrifying direct current), discharging mud cakes and descaling circularly to finish descaling work of each cathode plate.

The above embodiments are provided to illustrate the method and the core idea of the present invention, but not to limit the present invention. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit thereof.

Claims

1. The utility model provides a prevent electric infiltration electrode board device of scale deposit which characterized in that, prevent electric infiltration electrode board device of scale deposit include: the device comprises a control cabinet (1), a plate-and-frame filter press (2), a walking frame (3), a guide rail (4), a friction vibration system (5), a power supply (6), an anode plate (7) and a cathode plate (8); the friction vibration system (5) consists of a motor (501), a transmission shaft (502), a self-rotating head (503), a friction disc (504) and a folding mechanism (505); the folding mechanism (505) completes the forward and reverse rotation of 0-90 degrees in the radial direction; the friction vibration system (5) moves back and forth on the walking frame (3) by the guide rail (4); when scale is cleared, the control cabinet controls the friction system to move to a proper position on the walking rack, the folding mechanism turns the friction disc 90 degrees to be in contact with the front surface of the cathode plate, and the self-turning head and the cathode plate are started to rub for 10s, so that solid dirt of the cathode plate can be removed; after the first piece is cleaned, the friction disc is turned upwards and moved to the next plate frame by the folding mechanism, the friction disc is turned for 90 degrees and is in contact with the front surface of the negative plate again, the rotation head is started to drive the friction disc to rub with the negative plate, and the descaling function is achieved.

2. The anti-scaling electroosmotic electrode plate device according to claim 1, wherein: the friction disk (504) is driven by a rotation head (503).