CN219764605U - Filter pressing system - Google Patents

Abstract

The utility model relates to the technical field of filter pressing, and provides a filter pressing system. The system comprises a vertical plate-and-frame filter press, a vacuum filter tank, two vacuum pumps, a water supply pipeline and a drainage pipeline and a controller; the upper part of the vacuum filtrate tank is communicated with a first vacuum pipeline and a vacuum filtrate pipeline, the vacuum filtrate pipeline is communicated with a filter pressing filtrate pipeline and is provided with a vacuum switching valve, the lower part of the vacuum filtrate tank is communicated with a second vacuum pipeline and is provided with an L-shaped three-way control valve, the upper part and the lower part of the vacuum filtrate tank are communicated through a first liquid discharge pipeline, the pipeline is provided with a liquid discharge control valve, the bottom of the vacuum filtrate tank is communicated with the second liquid discharge pipeline, the pipeline is provided with a liquid discharge flap valve, and the top of the vacuum filtrate tank is provided with a vacuum pressure gauge; the two vacuum pipelines are communicated with two vacuum pumps, and the vacuum pumps are connected with a water supply pipeline and a drainage pipeline; the pressure gauge, the valve, the blow-down valve of the vacuum pump and the filter press, the compressed air control valve, the feeding pump and the extrusion pump are all connected with the controller. The utility model can realize almost zero fluctuation of the vacuum degree in the vacuum filter liquid tank, improve the filter pressing efficiency, balance the pressure in the plate frame and prolong the service life of the plate frame filter press.

Description

Filter pressing system

Technical Field

The utility model relates to the technical field of filter pressing, in particular to a filter pressing system.

Background

The vertical filter press is mainly used in industries of nonferrous and black mineral processing, chemical industry, food, medical production, coal dressing, sewage sludge and the like, and the main process is used for solid-liquid separation of solid-liquid, thereby achieving the effect of dehydration and filtration. The mechanical part of the vertical filter press mainly comprises a hopper part, a machine body part, a filter plate group, filter cloth, a filter cloth washing device, a filter cloth deviation correcting device, a filter cloth driving device, a pipeline and the like, in the production process, because the plate frame of the vertical filter press is subjected to high-pressure extrusion in the filter chamber, parts such as the filter plate, the support plate and the grille are easy to deform, the service life is greatly reduced, and high-pressure slurry is sprayed out through a sealing strip, so that slurry leakage is caused, the maintenance cost is greatly increased, and the surrounding environment of equipment is disordered.

Disclosure of Invention

Aiming at the problems existing in the prior art, the utility model provides the filter pressing system, which can realize almost zero fluctuation of the vacuum degree in the vacuum filter tank, greatly improve the liquid discharge efficiency, greatly improve the filter pressing efficiency of the vertical plate-and-frame filter press, enhance the filter pressing effect, balance the positive pressure in the plate-and-frame filter chamber of the vertical plate-and-frame filter press, and prolong the service life of the vertical plate-and-frame filter press.

The technical scheme of the utility model is as follows:

the filter pressing system comprises a vertical plate-and-frame filter press 17, wherein a feeding pump is arranged on a feeding pipeline of the vertical plate-and-frame filter press 17, a blow-down valve is arranged on a blow-down pipeline, a compressed air control valve is arranged on a compressed air pipeline, a plate frame is extruded by adopting an extrusion pump, and the filter pressing system further comprises a vacuum filtrate tank 1, a first vacuum pump 2, a second vacuum pump 3, a water supply pipeline 14, a drainage pipeline 15 and a controller, wherein a first vacuum chamber and a second vacuum chamber which are mutually independent are respectively arranged at the upper part and the lower part of the vacuum filtrate tank 1; the two sides of the upper part of the vacuum filtrate tank 1 are respectively communicated with a first vacuum pipeline 11 and a vacuum filtrate pipeline 13, one end, far away from the vacuum filtrate tank 1, of the vacuum filtrate pipeline 13 is communicated with a filter pressing filtrate pipeline of the vertical plate-and-frame filter press 17, the lower part of the vacuum filtrate tank 1 is communicated with a second vacuum pipeline 12, the upper part and the lower part of the vacuum filtrate tank 1 are communicated through a first liquid drainage pipeline 4, and the bottom of the vacuum filtrate tank 1 is communicated with a second liquid drainage pipeline 5; the first vacuum pipeline 11 and the second vacuum pipeline 12 are respectively communicated with air inlets of the first vacuum pump 2 and the second vacuum pump 3 at one end far away from the vacuum filtrate tank 1, the water inlets of the first vacuum pump 2 and the second vacuum pump 3 are communicated with the water supply pipeline 14, and the water outlets are communicated with the water drainage pipeline 15; the vacuum filtrate pipeline 13 is provided with a vacuum switching valve 9, the second vacuum pipeline 12 is provided with an L-shaped three-way control valve 8, the first liquid discharge pipeline 4 is provided with a liquid discharge control valve 6, the second liquid discharge pipeline 5 is provided with a liquid discharge flap valve 7, and the top of the vacuum filtrate tank 1 is provided with a vacuum pressure gauge 16; the vacuum gauge 16, all valves, all pumps are electrically connected to the controller.

Further, the vacuum filtrate pipeline 13 is provided with the vacuum pressure gauge 16.

Further, the water inlets of the first vacuum pump 2 and the second vacuum pump 3 are respectively communicated with the water supply pipeline 14 through a first water inlet pipeline and a second water inlet pipeline, and the first water inlet pipeline and the second water inlet pipeline are respectively provided with a water supply valve 10.

Further, the controller is a PLC controller.

Further, the vacuum filtrate pipeline 13 comprises a vacuum filtrate straight pipe and a plurality of vacuum filtrate branch pipelines communicated with the vacuum filtrate straight pipe, the filter pressing filtrate pipeline of the vertical plate-and-frame filter press 17 comprises a plurality of filter pressing filtrate branch pipelines, the vacuum filtrate branch pipelines are communicated with the filter pressing filtrate branch pipelines, and each vacuum filtrate branch pipeline is provided with a vacuum switching valve 9.

The beneficial effects of the utility model are as follows:

the utility model sets up the vacuum filtration pot, two vacuum pumps, controller, and the upper part and lower part of the vacuum filtration pot set up the independent vacuum chamber separately, and set up the vacuum switching valve on the first vacuum pipeline communicating with the upper part of the vacuum filtration pot and communicating with the filter pressing filtrate pipeline of the vertical plate-and-frame filter press, the second vacuum pipeline communicating with the vacuum pump and setting up the L-shaped three-way control valve, the first drain pipeline communicating with the upper part and lower part sets up the drain control valve, the second drain pipeline communicating with the bottom sets up the drain flap valve, the top sets up the vacuum pressure gauge, all valves, all vacuum pumps and blow-down valves of the vertical plate-and-frame filter press, compressed air control valve, feed pump, squeeze pump all connect with controller electrically at the same time, the automatic start and stop of the two vacuum pumps, the feeding pump, the extrusion pump and the valves can be controlled by the controller according to control logic, so that uninterrupted pumping work of the two vacuum pumps is realized, compared with positive pressure inside the vertical plate-and-frame filter press, the vacuum filtrate tank generates negative pressure effect, filtrate generated by filtering, extrusion and blow drying of the vertical plate-and-frame filter press enters the filter filtrate pipeline and then automatically discharges liquid into the vacuum filtrate tank through the vacuum filtrate pipeline, firstly, almost zero fluctuation of vacuum degree in the vacuum filtrate tank can be realized, the liquid discharge time can be set at will according to actual conditions on site, the liquid discharge efficiency is greatly improved, the filter pressing efficiency of the vertical plate-and-frame filter press is greatly improved, the filter pressing effect is enhanced, the production capacity is improved, secondly, the positive pressure inside the plate-and-frame filter press is balanced, the pressure of the plate-and-frame filter press is greatly reduced, and the filter plate-and-frame filter chamber is prevented from being caused by high-pressure extrusion in the filter plate-and-frame filter chamber, the support plate, the grid, the diaphragm, the sealing strips and other key parts deform, the service life of the vertical plate-and-frame filter press is prolonged, the slurry leakage phenomenon caused by high-pressure slurry splashing through the sealing strips is reduced, the maintenance frequency and the maintenance cost are reduced, the structure is simple, the filter pressing method is simple in flow, labor can be saved, the operation is easy, and the maintenance cost is low.

Drawings

FIG. 1 is a schematic diagram of a filter press system according to the present utility model in an embodiment.

Fig. 2 is a schematic structural diagram of a filter aid device in a filter pressing system according to the present utility model in an embodiment.

In the figure, a 1-vacuum filtrate tank, a 2-first vacuum pump, a 3-second vacuum pump, a 4-first liquid discharge pipeline, a 5-second liquid discharge pipeline, a 6-liquid discharge control valve, a 7-liquid discharge flap valve, an 8-L-shaped three-way control valve, a 9-vacuum switching valve, a 10-water supply valve, a 11-first vacuum pipeline, a 12-second vacuum pipeline, a 13-vacuum filtrate pipeline, a 14-water supply pipeline, a 15-water discharge pipeline, a 16-vacuum pressure gauge, a 17-vertical plate-and-frame filter press and an 18-filtration assisting device.

Detailed Description

The utility model will be further described with reference to the drawings and detailed description.

Referring to fig. 1, the filter pressing system of the utility model comprises a vertical plate-and-frame filter press 17 and a filter aid 18, wherein a feeding pump is arranged on a feeding pipeline of the vertical plate-and-frame filter press 17, a blow-down valve is arranged on a blow-down pipeline, a compressed air control valve is arranged on a compressed air pipeline, and a plate frame is extruded by adopting an extrusion pump. Referring to fig. 2, the filter aid 18 includes a vacuum filtrate tank 1, a first vacuum pump 2, a second vacuum pump 3, a water supply pipeline 14, a drain pipeline 15, and a controller, wherein a first vacuum chamber and a second vacuum chamber which are independent of each other are respectively arranged at the upper part and the lower part of the vacuum filtrate tank 1, the first vacuum chamber and the second vacuum chamber are separated by a partition board, the first vacuum chamber is connected with a vertical plate-and-frame filter press 17, and the second vacuum chamber is a liquid discharge vacuum chamber. Specifically, the upper portion both sides of vacuum filter fluid reservoir 1 communicate respectively has first vacuum pipeline 11, vacuum filtrate pipeline 13, keep away from of vacuum filtrate pipeline 13 vacuum filter fluid reservoir 1's one end with the filter-pressing filtrate pipeline intercommunication of vertical plate and frame filter press 17, the lower part intercommunication of vacuum filter fluid reservoir 1 has second vacuum pipeline 12, thereby the upper portion and the lower part of vacuum filter fluid reservoir 1 communicate through first flowing back pipeline 4 and realize the intercommunication of first vacuum chamber, second vacuum chamber, the bottom intercommunication of vacuum filter fluid reservoir 1 has second flowing back pipeline 5. The first vacuum pipeline 11 and the second vacuum pipeline 12 are respectively communicated with the air inlets of the first vacuum pump 2 and the second vacuum pump 3 at one end far away from the vacuum filtrate tank 1, the first vacuum chamber and the second vacuum chamber are respectively supplied with vacuum by the first vacuum pump 2 and the second vacuum pump 3, the first vacuum chamber is not contacted with air in the whole working process of working and liquid discharging, and the loss of vacuum degree is almost zero. The water inlets of the first vacuum pump 2 and the second vacuum pump 3 are communicated with the water supply pipeline 14, and the water outlets are communicated with the water discharge pipeline 15. The vacuum filtrate pipeline 13 is provided with a vacuum switching valve 9, the second vacuum pipeline 12 is provided with an L-shaped three-way control valve 8, the first liquid discharge pipeline 4 is provided with a liquid discharge control valve 6, the second liquid discharge pipeline 5 is provided with a liquid discharge flap valve 7, and the top of the vacuum filtrate tank 1 is provided with a vacuum pressure gauge 16; the vacuum gauge 16, all valves, all pumps are electrically connected to the controller.

In this embodiment, the vacuum pressure gauge 16 is disposed on the vacuum filtrate pipe 13; the water inlets of the first vacuum pump 2 and the second vacuum pump 3 are respectively communicated with the water supply pipeline 14 through a first water inlet pipeline and a second water inlet pipeline, and the first water inlet pipeline and the second water inlet pipeline are respectively provided with a water supply valve 10; the controller is a PLC controller; the vacuum filtrate pipeline 13 comprises a vacuum filtrate straight pipe and a plurality of vacuum filtrate branch pipelines communicated with the vacuum filtrate straight pipe, the filter pressing filtrate pipeline of the vertical plate-and-frame filter press 17 comprises a plurality of filter pressing filtrate branch pipelines, the vacuum filtrate branch pipelines are communicated with the filter pressing filtrate branch pipelines, and each vacuum filtrate branch pipeline is provided with a vacuum switching valve 9.

The utility model controls the filter pressing process of a vertical plate-and-frame filter press 17 through a controller, controls the atmosphere side of an L-shaped three-way control valve 8 connected with a second vacuum chamber to be closed in advance before the liquid in the first vacuum chamber is discharged, uses a first vacuum pump 2 and a second vacuum pump 3 to vacuumize the first vacuum chamber and the second vacuum chamber respectively, then communicates the first vacuum chamber with the second vacuum chamber to discharge the liquid in the first vacuum chamber into the second vacuum chamber, closes a liquid discharge control valve 6 after the liquid discharge in the first vacuum chamber is finished, and opens the atmosphere side of the L-shaped three-way control valve 8 and a liquid discharge flap valve 7 to discharge the liquid in the second vacuum chamber after time delay. In this embodiment, the method for performing pressure filtration by using the pressure filtration system of the present utility model includes the following steps:

step 1: the controller controls the feeding pump to start feeding, simultaneously controls the first vacuum pump 2 and the second vacuum pump 3 to start so as to vacuumize the first vacuum chamber and the second vacuum chamber, controls the connection atmosphere side of the liquid discharge control valve 6, the liquid discharge flap valve 7 and the L-shaped three-way control valve 8 to be closed, controls the vacuum switching valve 9 to be opened, and the vertical plate-and-frame filter press 17 starts to filter, so that the filtered liquid generated by filtering enters a filter pressing filtrate pipeline, and the filter pressing filtrate pipeline automatically discharges liquid into the vacuum filtrate tank 1 through the vacuum filtrate pipeline 13 under the negative pressure effect in the vacuum filtrate tank 1, and balances the positive pressure in the plate-and-frame filter chamber of the vertical plate-and-frame filter press 17 so that the pressure of the plate-and-frame filter chamber is greatly reduced;

step 2: after the feeding is finished, the controller controls the feeding pump to be closed to stop feeding, and controls the blow-off valve to be opened to blow off;

step 3: after the sewage discharge is finished, the controller controls the sewage discharge valve to be closed, controls the extrusion pump to start to extrude the plate frame, filtrate produced by extrusion enters a filter pressing filtrate pipeline, the filter pressing filtrate pipeline automatically discharges liquid into the vacuum filtrate tank 1 through the vacuum filtrate pipeline 13 under the action of negative pressure in the vacuum filtrate tank 1, and meanwhile, positive pressure in the plate frame filter chamber of the vertical plate frame filter press 17 is balanced, so that the pressure of the plate frame filter chamber is greatly reduced;

step 4: after extrusion is finished, the controller controls the extrusion pump to be closed and controls the compressed air control valve to be opened, compressed air is introduced into the vertical plate-and-frame filter press 17 to carry out blow drying on the plate-and-frame, filtrate generated by blow drying enters a filter-pressing filtrate pipeline, the filter-pressing filtrate pipeline automatically discharges liquid into the vacuum filtrate tank 1 through the vacuum filtrate pipeline 13 under the action of negative pressure in the vacuum filtrate tank 1, and meanwhile, positive pressure in a plate-and-frame filter chamber of the vertical plate-and-frame filter press 17 is balanced, so that the pressure of the plate-and-frame filter chamber is greatly reduced;

step 5: when the running time of the first vacuum pump 2 and the second vacuum pump 3 reaches a preset first time threshold value, the controller controls the liquid discharge control valve 6 to be opened;

step 6: when the opening time of the liquid discharge control valve 6 reaches a preset second time threshold, the controller controls the liquid discharge control valve 6 to be closed, and when the closing time of the liquid discharge control valve 6 reaches a preset third time threshold, the L-shaped three-way control valve 8 is controlled to be connected with the atmosphere side and the liquid discharge flap valve 7 to be opened, so that liquid discharge is performed;

step 7: when the opening time of the L-shaped three-way control valve 8 on the connected atmosphere side reaches a preset fourth time threshold value, the controller controls the L-shaped three-way control valve 8 to be closed on the connected atmosphere side and controls the liquid discharge flap valve 7 to be closed at the same time;

step 8: repeating the steps 1 to 7, and performing cyclic filter pressing.

Wherein the first time threshold, the second time threshold, the third time threshold and the fourth time threshold are set according to the liquid level of the vacuum filtration tank 1. In this embodiment, the first time threshold, the second time threshold, the third time threshold, and the fourth time threshold are 30s, 10s, 2s, and 30s, respectively.

The utility model sets up the vacuum chamber independently by setting up vacuum filtrate tank 1, two vacuum pumps, controller and upper and lower part of the vacuum filtrate tank 1 separately, and set up the vacuum switching valve 9 on the first vacuum pipeline 11 communicating with upper part of the vacuum filtrate tank 1 and communicating with the vacuum pump, the second vacuum pipeline 12 communicating with lower part of the vertical plate-and-frame filter press 17 and communicating with the vacuum pump and setting up L-shaped three-way control valve 8, set up the drain control valve 6 on the first drain pipeline 4 communicating with upper part and lower part, set up the drain flap valve 7 on the second drain pipeline 5 communicating with bottom, set up the vacuum pressure gauge 16 on the top, all above-mentioned valves, all vacuum pumps and blow-down valves, compressed air control valves, feed pump, extrusion pump of the vertical plate-and-frame filter press are all electrically connected with controller at the same time, the two vacuum pumps, the feeding pump, the extrusion pump and the automatic opening and closing of each valve can be controlled by the controller according to control logic, so that the two vacuum pumps can continuously pump air, compared with the positive pressure in the vertical plate-and-frame filter press 17, the vacuum filter pot 1 generates negative pressure, so that the filtrate generated by filtering, extruding and blowing drying of the vertical plate-and-frame filter press 17 enters a filter pressing filtrate pipeline and then automatically discharges liquid into the vacuum filter pot 1 through the vacuum filtrate pipeline 13, firstly, almost zero fluctuation of the vacuum degree in the vacuum filter pot 1 can be realized, the liquid discharge time can be set at will according to the actual condition of the site, the liquid discharge efficiency is greatly improved, the filter pressing efficiency of the vertical plate-and-frame filter press 17 is greatly improved, the filter pressing effect is enhanced, the production capacity is improved, the positive pressure in the plate-and-frame filter press 17 can be balanced, the pressure of the plate-and-frame filter chamber is greatly reduced, the filter plate, the support plate, the grating, the diaphragm, the sealing strips and other key parts are prevented from deforming due to high-pressure extrusion in the plate-frame filter chamber, the service life of the vertical plate-frame filter press 17 is prolonged, the slurry leakage phenomenon caused by high-pressure slurry splashing through the sealing strips is reduced, the maintenance frequency and the maintenance cost are reduced, the structure is simple, the filter pressing method is simple in flow, labor can be saved, the operation is easy, and the maintenance cost is low.

It should be apparent that the above-described embodiments are merely some, but not all, embodiments of the present utility model. The above examples are only for explaining the present utility model and do not limit the scope of the present utility model. Based on the above embodiments, all other embodiments obtained by those skilled in the art without making creative efforts, i.e., all modifications, equivalents, improvements etc., which are within the spirit and principles of the present utility model, fall within the protection scope of the present utility model as claimed.

Claims (5)

1. The filter pressing system comprises a vertical plate-and-frame filter press (17), wherein a feeding pump is arranged on a feeding pipeline of the vertical plate-and-frame filter press (17), a blow-down valve is arranged on a blow-down pipeline, a compressed air control valve is arranged on a compressed air pipeline, and a plate frame is extruded by adopting an extrusion pump; the two sides of the upper part of the vacuum filtrate tank (1) are respectively communicated with a first vacuum pipeline (11) and a vacuum filtrate pipeline (13), one end, far away from the vacuum filtrate tank (1), of the vacuum filtrate pipeline (13) is communicated with a filter pressing filtrate pipeline of the vertical plate-and-frame filter press (17), the lower part of the vacuum filtrate tank (1) is communicated with a second vacuum pipeline (12), the upper part and the lower part of the vacuum filtrate tank (1) are communicated through a first liquid drainage pipeline (4), and the bottom of the vacuum filtrate tank (1) is communicated with a second liquid drainage pipeline (5); the first vacuum pipeline (11) and the second vacuum pipeline (12) are respectively communicated with air inlets of the first vacuum pump (2) and the second vacuum pump (3) at one end far away from the vacuum filtrate tank (1), a water inlet of the first vacuum pump (2) and a water inlet of the second vacuum pump (3) are communicated with the water supply pipeline (14), and a water outlet of the first vacuum pump is communicated with the water drainage pipeline (15); the vacuum filter is characterized in that a vacuum switching valve (9) is arranged on the vacuum filtrate pipeline (13), an L-shaped three-way control valve (8) is arranged on the second vacuum pipeline (12), a liquid discharge control valve (6) is arranged on the first liquid discharge pipeline (4), a liquid discharge flap valve (7) is arranged on the second liquid discharge pipeline (5), and a vacuum pressure gauge (16) is arranged at the top of the vacuum filter tank (1); the vacuum pressure gauge (16), all valves and all pumps are electrically connected with the controller.

2. Filter pressing system according to claim 1, characterized in that the vacuum filtrate line (13) is provided with the vacuum pressure gauge (16).

3. The filter pressing system according to claim 1, wherein the water inlets of the first vacuum pump (2) and the second vacuum pump (3) are respectively communicated with the water supply pipeline (14) through a first water inlet pipeline and a second water inlet pipeline, and the first water inlet pipeline and the second water inlet pipeline are respectively provided with a water supply valve (10).

4. The filter press system of claim 1, wherein the controller is a PLC controller.

5. The filter pressing system according to claim 1, characterized in that the vacuum filtrate line (13) comprises a vacuum filtrate straight pipe, a plurality of vacuum filtrate branch lines communicating with the vacuum filtrate straight pipe, the filter pressing filtrate line of the vertical plate and frame filter press (17) comprises a plurality of filter pressing filtrate branch lines communicating with the filter pressing filtrate branch lines, each vacuum filtrate branch line being provided with the vacuum switching valve (9).