CN218989058U - Automatic desliming and cleaning system for filter cloth - Google Patents

Abstract

The utility model relates to the technical field of sludge dewatering treatment, in particular to an automatic filter cloth desliming and cleaning system, which comprises a plate-and-frame filter press body, wherein the plate-and-frame filter press body comprises a plurality of filter plates and filter frames, and also comprises a controller and an electromagnetic valve, a high-pressure air channel is arranged in the filter plates, a hose inlet communicated with the high-pressure air channel is arranged on the filter plates, and a plurality of high-pressure air outlets communicated with the high-pressure air channel are arranged around the filter plates; the filter plate side is equipped with high-pressure air pipeline, high-pressure air pipeline is equipped with the venthole, the venthole passes through hose connection with the hose access, high-pressure air pipeline connects air compressor, the solenoid valve sets up on high-pressure air pipeline, solenoid valve, air compressor all are connected with the controller electricity. The utility model can quickly and effectively lead all sludge to automatically fall off from the filter cloth, improves the desliming efficiency, reduces the labor cost, and can also realize the cleaning of the filter cloth and remove the residual sludge.

Description

Automatic desliming and cleaning system for filter cloth

Technical Field

The utility model relates to the technical field of sludge dewatering treatment, in particular to an automatic filter cloth desliming and cleaning system.

Background

In the daily sludge treatment process of a sewage treatment plant, the desliming treatment of sewage is usually carried out through a plate-and-frame filter press. The current plate-frame filter press is composed of a plurality of groups of filter chambers formed by alternately arranging filter plates and filter frames, and filter cloth is arranged between the filter plates and the filter frames. The surface of the filter plate is provided with grooves, and the convex parts of the grooves are used for supporting the filter cloth. The corners of the filter frame and the filter plate are provided with through holes, and the filter frame and the filter plate form a complete channel after being assembled, and can be filled with suspension liquid, washing water and lead out filtrate. And the suspension is hydraulically pressed into the filter chamber through a feed pump from a feed inlet in the center of the filter plate, and filter residues are formed on the filter cloth until the filter chamber is full. The filtrate passes through the filter cloth and flows to the corner channels of the plate frame along the grooves of the filter plate, and is discharged in a unified self-flowing way. During the treatment, the pressed sludge is found to be adhered to the flat part and the protruding part of the upper part of the filter plate. The following problems were found to be specific in the subsequent studies:

(1) Longer and more molecular branches can be formed after the sludge is conditioned by adding the medicament into the conditioning tank, and sludge particles are wrapped to form flocculation. The viscosity of the sludge is increased, the filter cloth is easily adhered, and the cleaning is very inconvenient. (2) The mud pressure of the plate-and-frame filter press is insufficient, and the amount of 'filled' mud in the plate-and-frame space is insufficient, so that the thickness of the generated mud cake is too thin (generally up to 3 cm), the gravity of the mud cake cannot overcome the 'adhesion force' between the mud cake and filter cloth, and the mud cake cannot fall down. (3) The water seepage holes are easily blocked after the sludge is adhered to the filter cloth, so that the water seepage effect of the filter cloth is directly reduced, the sludge inlet time is prolonged, and the expected effect cannot be achieved by squeezing and filtering. (4) After desliming, the filter cloth needs to be cleaned by water, and in the process, all filter plates need to be compacted and then soaked and cleaned by water. Wherein the residue of the mud cake can not be thoroughly cleaned, and the effect is poor. (5) The desliming can only be carried out in sequence, the desliming time is prolonged, and the working efficiency is reduced.

The common solution is that (1) lime and other coagulant aids are added to the sludge to improve the properties of the sludge, and proper conditions of a plate-and-frame filter press are gradually searched. (2) The method comprises the steps of (1) manually removing sludge at adhesion positions, (3) increasing filter cloth replacement times, (4) adding a cleaning agent into cleaning water to improve cleaning effect and the like.

The solution can only play a temporary relieving effect, can not improve the desliming efficiency, and has no change in desliming time. The labor and material costs are increased during long-term use.

Disclosure of Invention

The utility model aims to provide an automatic desliming and cleaning system for filter cloth, which can quickly and effectively ensure that all sludge automatically falls off from the filter cloth, improve desliming efficiency, reduce labor cost, clean the filter cloth, remove residual sludge, ensure that water passing meshes of the filter cloth are kept smooth, prolong the service life of the filter cloth, and reduce labor cost and material cost.

In order to achieve the above purpose, the automatic desliming and cleaning system of filter cloth is provided, including the plate-and-frame filter press body, the plate-and-frame filter press body includes a plurality of filter plates and filter frames, its characterized in that: the filter plate is internally provided with a high-pressure air channel, a hose inlet communicated with the high-pressure air channel is arranged on the filter plate, the electromagnetic valve is arranged at the hose inlet, and a plurality of high-pressure air outlets communicated with the high-pressure air channel are arranged around the filter plate; the side of the filter plate is provided with a high-pressure air pipeline, the high-pressure air pipeline is provided with an air outlet, the air outlet is connected with a hose inlet through a hose, the high-pressure air pipeline is connected with an air compressor, and the air compressor is electrically connected with a controller.

Further, the filter plate and the two sides of the filter frame are respectively provided with an ear part, the filter plate and the two sides of the filter frame are hung between two cross beams of the frame filter press body through the ears, the ears are provided with magnets, the cross beams are provided with a plurality of Hall sensors, and the Hall sensors are electrically connected with the controller.

Further, the beam is provided with indicating lamps of which the number corresponds to that of the Hall sensors, and the indicating lamps are electrically connected with the controller.

Further, the indicator light is an LED indicator light.

Principle and advantage:

1. after the press filter is pressed, the pressing device is retracted to a contracted state, and all filter plates and filter frames are required to be pulled open. The technical scheme detects whether the filter plate and the filter frame are pulled apart or not through the Hall sensor, and the color indication can be carried out through the LED indicator lamp under the condition of whether the filter plate and the filter frame are pulled apart or not, so that the filter plate and the filter frame are pulled apart completely by staff, and the follow-up desliming is convenient.

2. When desliming, the electromagnetic valve is opened, so that high-pressure air enters the high-pressure air pipeline, then enters the high-pressure air channels inside the filter plates respectively through the hoses, is discharged through the high-pressure air outlets on the filter plates, finally enters the grooves on the surfaces of the existing filter plates, and forms a high-pressure air layer between the filter plates and the filter cloth. The filter cloth is swelled and irregularly vibrated, the contact between the mud cake and the filter cloth is reduced after the expansion of the filter cloth, and an air barrier is formed between the filter cloth and the mud cake due to the air permeability of the filter cloth and the lack of air permeability of the mud cake. The mud cake is pushed outwards by the outward thrust generated by the high-pressure air from inside to outside (the mud cake is sprung out by the instant inflation and outward expansion of the filter cloth), so that the automatic falling-off effect of the mud cake is achieved.

3. After desliming is finished, the electromagnetic valve is opened again, and high-pressure air is utilized to clean the residual sludge on the filter cloth and the sludge in the water holes of the filter cloth.

Drawings

FIG. 1 is an isometric view of a prior art plate and frame filter press body;

FIG. 2 is a top cross-sectional view of the prior art filter plate, filter cloth and filter frame of FIG. 1;

FIG. 3 is a schematic diagram of the filter plate in the present embodiment;

fig. 4 is a schematic diagram showing the connection between the hose and the high-pressure air line in this embodiment.

Detailed Description

The following is a further detailed description of the embodiments:

reference numerals in the drawings of the specification include: the hose is connected with the inlet 1, the air outlet 2, the high-pressure air pipeline 3, the magnet 4, the central hole 5, the bulge 6, the hose 7, the high-pressure air pipeline 8, the filter frame and filter plate combination 9, the lug 10, the Hall sensor 11, the filter cloth 20, the cross beam 21, the filter plate 30, the through hole 32, the filter tank 33, the filter frame 40, the cavity 41, the overflow pipeline 50 and the liquid inlet pipeline 60.

Examples

An automatic filter cloth desliming and cleaning system is applied to an existing plate-and-frame filter press body, basically as shown in fig. 1, wherein the plate-and-frame filter press body comprises a plurality of filter plates and filter frames, and is mainly composed of a bracket, filter cloth 20, a plurality of filter plates 30 and filter frames 40.

As shown in fig. 2, the filter plates 30 and the filter frames are combined into a filter frame-filter plate combination 9, the filter frame-filter plate combination 9 is provided with a plurality of groups, each of the filter plates 30 and the filter frames is provided with a through hole 32 positioned at the outer side, adjacent through holes 32 are mutually connected to form a passage, and the through holes 32 are connected to the overflow pipe 50.

The filter plate 30 has a central opening 5 and the suspension enters the central opening 5 from a feed conduit 60. The filter frame 40 also has a cavity 41. Adjacent cavities 41 are connected with the central hole 5, the filter cloth 20 is positioned between the filter plate 30 and the filter frame 40, filter grooves 33 are arranged on both sides of the filter plate, the filter grooves 33 are communicated with the through holes 32 through Y-shaped fine pipelines, the filter cloth 20 and the filter grooves form a liquid filter chamber, the filter cloth 20 and the filter frame 40 form a solid filter chamber, and a plurality of bulges 6 for supporting the filter cloth 20 are arranged in the filter grooves 33. After filtration, the sludge remains on the surface of the filter cloth 20 on both sides in the cavity 41. The filtrate passes through the filter tank and the Y-shaped fine tube to enter the through hole 32.

The above is the basic structure of the existing plate-and-frame filter press body, and this embodiment does not improve it, only for the basic description that is convenient for understand this scheme and do, the focus of this scheme improvement is the relevant design of filter plate, therefore does not make too much redundant description to the existing plate-and-frame filter press body.

The improvement points of the scheme are as follows:

the filter plate 30 is internally provided with a high-pressure air channel, a hose inlet 1 communicated with the high-pressure air channel is arranged on the filter plate 30, and a plurality of high-pressure air outlets communicated with the high-pressure air channel are arranged around the filter plate 30 as shown in fig. 3 and 4; the filter plate 30 side is equipped with highly-compressed air pipeline 3, highly-compressed air pipeline 3 is equipped with venthole 2, venthole 2 is connected through hose 7 with hose access port 1, highly-compressed air pipeline 3 connects air compressor, the solenoid valve sets up on highly-compressed air pipeline 3, solenoid valve, air compressor all are connected with the controller electricity.

The filter plate 30 and the filter frame 40 are provided with lugs 10 on both sides, the filter plate is hung between two cross beams 21 of the frame filter press body through the lugs 10, the lugs 10 are provided with magnets 4, the cross beams 21 are provided with a plurality of Hall sensors 11, and the Hall sensors 11 are electrically connected with a controller.

The beam 21 is provided with indication lamps corresponding to the Hall sensors 11 in number, and the indication lamps are electrically connected with the controller. The indicator lamp is an LED indicator lamp. The LED indicator lights may display red and green colors, with the red color indicating that the controller hall sensor 11 has not detected the magnet 4, i.e., the worker has not separated the filter plate 30 from the filter frame 40 and pulled to a designated position. The green color indicates that the controller hall sensor 11 detects the magnet 4, i.e., the worker has separated the filter plate 30 and the filter frame 40 and pulled to a designated position. In this embodiment, the controller adopts the existing PLC programmable logic controller, and the hall sensor 11, the LED indicator light, the solenoid valve and the air compressor are used as peripheral circuits of the PLC programmable logic controller and are connected to the input/output serial port of the PLC programmable logic controller.

When desliming, the electromagnetic valve is opened, so that high-pressure air enters the high-pressure air pipeline 3, then enters the high-pressure air channels inside the filter plates 30 respectively through the hoses 7, is discharged through the high-pressure air outlets on the filter plates 30, finally enters the grooves on the surfaces of the existing filter plates 30, and forms a high-pressure air layer between the filter plates 30 and 20 filter cloth. The 20 filter cloth is swelled and irregularly vibrated, the contact between the mud cake and the 20 filter cloth is reduced after the 20 filter cloth is swelled, and an air barrier is formed between the 20 filter cloth and the mud cake due to the air permeability of the 20 filter cloth and the air permeability of the mud cake. The mud cake is pushed outwards by the outward thrust generated by the high-pressure air from inside to outside (the mud cake is sprung out by the instantaneous inflation of the filter cloth 20, so that the mud cake automatically falls off.

Whether the filter plate 30 and the filter frame 40 are pulled or not is detected by the Hall sensor 11, and color indication can be carried out by the LED indicator lamp under the condition of whether the filter plate 30 and the filter frame 40 are pulled or not, so that a worker can pull the filter plate 30 and the filter frame 40 completely, and the follow-up desliming is convenient.

And opening the electromagnetic valve again, and cleaning the redundant sludge remained on the 20 filter cloth by using high-pressure air and the sludge blocking the water holes of the 20 filter cloth.

The foregoing is merely exemplary of the present utility model, and the specific structures and features well known in the art will be described in detail herein, so that those skilled in the art will be able to ascertain the general knowledge of the state of the art, including the application date or the priority date, and to ascertain the general knowledge of the state of the art, without the ability to apply the general experimental means before that date, so that those skilled in the art, with the benefit of this disclosure, may make various modifications of the present utility model with the ability to work itself, without the ability to work out the present utility model, as such typical structures or methods would be considered to be an obstacle for those skilled in the art to practice the present utility model. It should be noted that modifications and improvements can be made by those skilled in the art without departing from the structure of the present utility model, and these should also be considered as the scope of the present utility model, which does not affect the effect of the implementation of the present utility model and the utility of the patent. The protection scope of the present application shall be subject to the content of the claims, and the description of the specific embodiments and the like in the specification can be used for explaining the content of the claims.

Claims (4)

1. The utility model provides an automatic desliming of filter cloth and cleaning system, includes the plate-and-frame filter press body, the plate-and-frame filter press body includes a plurality of filter plates and filter frame, its characterized in that: the filter plate is internally provided with a high-pressure air channel, a hose inlet communicated with the high-pressure air channel is arranged on the filter plate, and a plurality of high-pressure air outlets communicated with the high-pressure air channel are arranged on the periphery of the filter plate; the filter plate side is equipped with high-pressure air pipeline, high-pressure air pipeline is equipped with the venthole, the venthole passes through hose connection with the hose access, high-pressure air pipeline connects air compressor, the solenoid valve sets up on high-pressure air pipeline, solenoid valve, air compressor all are connected with the controller electricity.

2. The automatic filter cloth desliming and cleaning system of claim 1, wherein: the filter plate and the filter frame both sides all are equipped with the ear, hang between two crossbeams of frame filter press body through the ear, be equipped with magnet on the ear, be equipped with a plurality of hall sensor on the crossbeam, hall sensor is connected with the controller electricity.

3. An automatic desliming and cleaning system for filter cloth according to claim 2, wherein: the beam is provided with indicating lamps with the quantity corresponding to the Hall sensors, and the indicating lamps are electrically connected with the controller.

4. A filter cloth automatic desliming and cleaning system as claimed in claim 3, wherein: the indicator lamp is an LED indicator lamp.

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