JPH0137685Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for cleaning cloth and plates of a filter press.

FIG. 1 is a pipe system diagram of a conventional filter press, which is a device for supplying a concentrated slurry solution to a filter press 10. The solution is passed through a valve _V1 to a supply tank 2, and then connected to an arrow A. Filter press 10 via pump 5 as shown in
The liquid passed through the supply port 7 in the center of the plate is sent to the liquid tank 7 through the plate upper liquid port 8 and the lower liquid port 12 of the filter press 10. In addition, 3 is a stirrer to prevent sedimentation, 1, 4,
6, 11, 13, and 14 are conduits, and _V2 to _V4 are valves.

FIG. 2 is a partial sectional view of the filter press 10. When the capacity of the filter press 10 decreases, the cloth 17 covering the plate 18 needs to be cleaned. In this case, first stop the pump 5, close the valves V ₁ and V ₂ , and turn off the filter press 1.
0, the plates 18 shown in FIG. 2 were opened one by one in the usual manner, and the cloth 17
The slag, so-called cake, adhering to the cloth 17 is discharged, and then high-pressure water or the like is sprayed onto the surface of the cloth 17 to wash it, and the cleaning liquid falls into a gutter provided below and is discharged. but,
This work requires a long time, and since the back side of the cloth 17 and the plate cannot be washed, depending on the nature of the excess stock solution, intolerant salts may form and adhere to the liquid passage grooves 19 of the cloth 17 and plate 18, resulting in a short period of time. There were disadvantages such as the overcapacity decreased over time and the life of the cloth 17 and plate 18 was shortened.

In order to eliminate such drawbacks of the conventional method, the present invention is designed to wash cloths and boards by injecting washing water in the opposite direction.
An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 3 is a piping system diagram showing an embodiment of the filter press cleaning device of the present invention, and the same parts as in FIG. 1 are given the same reference numerals.

As shown in the figure, the equipment for supplying the stock solution to the filter press 10 includes a pipe line 1 and a valve 1 for supplying the stock solution to the supply tank 2, an agitator 3 in the supply tank 2, and a pump 5 between the supply tank 2 and the pump 5. Pipe line 4 communicating the suction side, the discharge side of the pump 5 and the filter press 10
A pipe line 6 is provided which communicates with the supply port 7 in the center of the plate via a valve _V2 . The liquid circuit of the filter press 10 includes a pipe line 11 that communicates with the liquid tank 9 from the liquid port 8 on the top of the plate via valve _V3 , and a pipe line that connects the liquid port 12 on the bottom of the plate of the filter press 10 via valve _V5 . A conduit 13 communicating with the supply tank 11 and a conduit 14 branched from the conduit 11 and connected to the supply tank 2 via a valve V ₄ are provided.

Next, as a circuit for cleaning the filter press 10, a pipe 15 that supplies cleaning water to the filter press 10 via a valve _V6 is connected to the pipe 13, and as a circuit for recovering the liquid after cleaning. A pipe line 16 is provided which branches off from the pipe line 6 which communicates the supply port ₇ of the filter press ₁₀ with the valve V2 and communicates with the supply tank 2 via the valve V7.

In the apparatus constructed in this manner, the liquid flow during over-operation is as shown by arrow A. The stock liquid enters the feed tank 2 from the pipe line 1 through the valve _V1 . In the supply tank 2, a stirrer 3 is installed to prevent sedimentation.
is constantly stirred. Next, it is fed under pressure from the supply tank 2 to the supply port 7 of the filter press 10 via the pipe line 4, pump 5, and valve _V2 . In this filter press 10, the liquid passes through a cloth 17 as shown in FIG.
It passes through _V3 and enters liquid tank 9. On the other hand, the other part of the liquid is also discharged from the lower liquid port 12, passes through the pipe line 13 and the valve _V5 , and joins the liquid from the upper liquid port 8 in the pipe line 11. Note that the valves V ₄ , V ₆ , and V ₇ are closed during operation, and liquid does not flow through the pipes 14 , 15 , and 16 .

When over-operation ends or over-capacity decreases due to accumulation of slag, it is necessary to wash the cloth 17 and plate 18, so first stop the pump 5 and close valves V ₁ and V _2. filter press 1
Stop supplying stock solution to 0.

Next, the plates 18 are sequentially opened one by one in the usual manner, that is, automatically, to discharge the slag. At this time, if the plate 18 is vibrated with a vibrator, it is effective for evacuation. Immediately after discharging the slag, the plate 18 is closed and the cleaning operation begins. That is, while valves V ₁ and V ₇ remain closed, valves V ₃ and V ₅ are further closed, and valves V ₄ and V ₆ are opened. Then, clean wash water flows through pipes 15 and 13.
The liquid flows in the direction of the dotted arrow B, is injected into the lower liquid inlet 12 of the filter press 10, and eventually overflows from the upper liquid inlet 8 and flows into the supply tank 2 via the pipe line 11 and the valve _V4 .

At this point, the air inside the filter press 10 is degassed, the filter press 10 is filled with cleaning water, and a portion of the liquid passage groove 19 of the plate 18 is cleaned. Next, valve V ₅ ,
When V ₇ is opened and valve V ₄ is closed, the cleaning water flows through arrow C.
It will flow in the direction of , that is, in the opposite direction to the direction of time. Therefore, the cleaning water flows from the pipe line 13 to the lower liquid port 1.
2, is injected into the filter press 10 via the valve V ₅ from the pipe 11 to the upper liquid inlet 8,
The liquid passes through the passage groove 19 of the plate 18 and the cloth 17, is discharged from the supply port 7, passes through the pipe line 6 and the valve 7, and then enters the pipe line 1.
6 into the supply tank 2. At this time, cloth 17,
Plate 18 is cleaned. Then, when water is passed for an appropriate period of time and cleaning is completed, valves V ₆ and V ₇ are closed, valves V ₂ and V ₄ are opened, and pump 5 is started. _V3
Since it is closed, the water is circulated between the supply tank 2 and the filter press 10. Therefore, when the cloth 17 is precoated with slag and the circulating fluid becomes clear, valves V ₁ and V ₃ are opened, and valve V ₄ is closed to return to normal overoperation.

If the opening and closing operations of the valves, pumps, and filter press plates are set to be performed automatically at desired times in a predetermined order in this manner, unmanned operation is possible.

As explained in detail above, according to the present invention, it is possible to easily modify an existing filter press with simple equipment, and not only can cleaning work be done in a short time, but also makes it possible to clean fabrics and boards with ease. Since the formation and adhesion of soluble salts is prevented, their lifespan is greatly extended, the operating rate is improved, and the economical effects are extremely significant.

[Brief explanation of the drawing]

FIG. 1 is a piping system diagram of a conventional filter press, FIG. 2 is a partial sectional view of the filter press, and FIG. 3 is a piping system diagram showing an embodiment of the filter press cleaning device of the present invention. 2... Supply tank, 5... Pump, 7... Supply port,
8...Upper liquid inlet, 9...Liquid tank, 10...Filter press, 12...Lower liquid inlet, 17...
Cloth, 18... Board, 19... Liquid passage groove, 1, 4,
6, 11, 13, 14, 15... Pipeline, V ₁ to _{V 7}
……valve.

Claims (1)

[Scope of utility model registration request] The concentrated slurry is transferred to the supply tank via valve V ₁ , then pressurized by a pump and transferred to valve V ₂ .
The liquid from the upper and lower liquid ports of the filter press is passed through the central supply port of the multiple openable plates of the filter press through the cloth that covers each plate in the filter press, and then the liquid is passed through the valve.
In this device, the cleaning liquid from cleaning is sent to the supply tank via valve V ₃ to the liquid tank, and a valve V ₆ is installed in the pipe line that communicates the lower liquid opening of the filter press with the liquid _tank . A valve _V5 is provided downstream of the cleaning liquid confluence point of the pipe connecting the lower liquid inlet and the upper liquid inlet, and the pipe for supplying the raw liquid to the plate is A branch pipe line is provided from the downstream side of the pump discharge side valve _V2 to the stock solution supply tank via the valve _V7 , so that the cleaning solution can be press-injected in the direction opposite to the direction in which the stock solution passes through the cloth. Filter press cleaning equipment.