JPH0353685Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a device for washing dirty cloth without removing it from the machine body, and particularly to a cloth washing device for a filter press in which the washing device is configured to be movable.

Conventionally, when inorganic substances such as calcium carbonate or slurry adhere to cloth, the cloth is removed from the machine, immersed in an acidic treatment solution for a long time to dissolve the clogging components, and then removed using a high-speed jetter or brush. I was washing it with water. This operation was time-consuming because the cloth was attached and detached from the aircraft body. When pickling, it is dangerous because the strong acid solution must be handled by hand. Another method was to inject an acidic cleaning solution into the chamber with the dirty cloth still attached to the aircraft, and after removing it, inject a neutralizing agent into the chamber. This method has the advantage of eliminating the labor of removing the fabric from the fuselage and the risk of irritation from handling strongly acidic liquids.

This invention relates to a device that cleans the cloth while it is still attached to the aircraft body, which is the latter part of the conventional device.When the cloth is clogged with inorganic substances such as calcium carbonate or slurry, the cloth cleaning device can be changed to a filter press. The filter press is moved to a space close to the filter press, and a chemical solution is passed through the front and back of the cloth to clean it. After cleaning the cloth, the piping of the cleaning device can be removed from the filter press and moved to a place where it will not get in the way. When washing the cloth, the chemical can be injected alternately from the front or back side of the cloth.

Hereinafter, this invention will be explained in detail with reference to the attached drawings. First, the structure is such that when the cloths 2 provided between each plate 1 become clogged, these cloths 2 are used to remove the cloths 2 between the plates. In the apparatus, a chemical tank 3 and a pump 8 for supplying the chemical liquid are mounted on a trolley, and the supply pipe 4 of the chemical liquid tank 3 is connected via the pump 8 to one of the cloths 1 . Connected to approximately half of the adjacent filtrate discharge ports 6,
The return pipe 7 to the chemical liquid tank 3 is connected to the other end of the remaining adjacent filtrate discharge port 6..., and the chemical injection is switched so that it can be switched from the supply pipe 4 or the return pipe 7 as appropriate. Valves 14, 15, 16, and 17 are provided.

As described above, since the cleaning device 12 is configured to be movable, the cleaning device 12 can be used to clean the cloths 2 attached to a plurality of filter presses 13.
It is also convenient for moving 2. Moreover, even if there is little space around the filter press 13, it can be moved as long as there is a location where the cleaning device 12 is installed. Furthermore, if flexible tubes are used for the supply pipe 4 and the return pipe 7, they can be easily connected to and removed from the machine body, and they can be moved to a place where they will not get in the way during the filtering operation of the filter press 13.

Next, the cleaning device 12 will be described in detail with reference to FIGS. 1 and 2.
Reference numerals 6 and 17 are switching valves that connect a circuit for injecting a chemical solution from the chemical solution supply pump 8 into the chamber 5 to the supply pipe 4.
It is possible to switch between a circuit in which the water is injected through the return pipe 7 and discharged through the return pipe 7, and a circuit in which the water is injected through the return pipe 7 and discharged through the supply pipe 4. Reference numeral 18 denotes an operation panel, which is incorporated into the trolley 11. Reference numeral 19 is a liquid level gauge, which is interlocked and connected to the pump 8. 20
is a stirrer, and 21 is a strainer. Further, reference numeral 22 is an on-off valve provided at the filtrate discharge port 6, 23 is a filtrate trough, 24 is a liquid supply plate held between cloths 2, 2,
5 is a stock solution supply port provided on the plate 1.

The chemical solution used in this cloth cleaning device is
This is an acidic cleaning solution containing inhibitors, surfactants, etc., which dissolves carbonates and inorganic salts that cannot be removed with jet water.
The inhibitor prevents metal parts from being corroded by acid, and the surfactant maintains the effectiveness of the inhibitor by reducing ferric ions generated by acid cleaning.

Since the present invention is configured as described above, when the clogged matter adhering to the cloth 2 cannot be removed with jet water, one of the parallel plates 1... , header pipes 9 are connected to approximately half of the adjacent filtrate discharge ports 6, and header pipes 10 are connected to the remaining approximately half of the adjacent filtrate discharge ports 6. Next, a filtrate discharge port 6 where the chemical supply pipe 4 and the return pipe 7 are arranged in parallel.
are connected via the header pipes 9 and 10, respectively, open the valves 14 and 17 of the cleaning device 12, close the valves 15 and 16, and then start the pump 8 for supplying the chemical solution. A cleaning chemical solution can be supplied to the chamber 5 of the filter press 13 via the supply pipe 4 . In other words, the chemical solution flows from approximately half of the adjacent filtrate discharge ports 6 to the upper surface of the plate 1 and the cloth 2.
The chemical liquid flows into the chamber 5 while dissolving the salts adhering to the cloth 2, and the chemical liquid rises and passes through the liquid supply plate 24 and the stock solution supply port 25 of the plate 1, and then flows into the remaining adjacent chambers. 5. The inflowing chemical solution dissolves salts while being fed from the front surface to the back surface of the cloth 2, and is returned to the chemical solution tank 3 from the filtrate outlet 6.

Then, after a predetermined time, the pump 8 is stopped, the valves 14 and 17 are closed, and the valves 15 and 16 are opened, and then the pump 8 is started, thereby supplying the chemical solution from the return pipe 7 to the chamber 5. can do. That is, the chemical solution is first injected from the back side of the cloth 2 into the cloth 2 in which carbonates and inorganic salts are attached in the filtration chamber 5, and after a predetermined time, the chemical solution is injected from the back side. It promotes dissolution from before and after. Then, if the pump 8 is stopped after a predetermined time and the chemical solution in the chamber 5 is extracted,
Carbonates, inorganic salts, etc. that had adhered to the cloth 2 have been dissolved, and the clogging of the cloth 2 has been eliminated. Furthermore, clogging components remaining in the weave of the cloth 2 can be completely removed by opening the plate 1 and spraying jet water onto the cloth 2.

Note that the supply pipe 4 and the return pipe 7 are connected to the filter press 1.
3, if the liquid trough 23 is connected to the chemical liquid tank 3 and the valve 22 is opened,
The chemical solution remaining in the chamber 5 can be recovered.

As detailed above, according to this invention, the cloth cleaning device is movably arranged, so it is no longer necessary to permanently install the cleaning device near the filter press as in the conventional device, but without the need for piping work. There is no need to do it. That is, in the present invention, as long as there is a place for installing the cleaning device near the filter, the cleaning device can be easily connected to the filter press. And when the filter press is in operation,
By moving the cleaning equipment out of the way, you can make effective use of the space around the aircraft.

Further, when cleaning cloths provided in a plurality of filter presses, by moving the cleaning device, the clogged cloths of each filter press can be cleaned one by one with one cleaning device. Moreover, in the present invention, a supply pipe and a return pipe are respectively connected to the filtrate discharge ports of approximately half of the adjacent chambers and the remaining filtrate discharge ports at both adjacent ends of the parallel chambers to supply the cleaning chemical solution. Since the cloth can be supplied alternately from the supply pipe and the return pipe, the clogged material adhering to the cloth can be washed alternately from the front and back of the cloth, thereby promoting the removal of the clogged material.

[Brief explanation of the drawing]

FIG. 1 is a partially longitudinal side view of a cloth cleaning device in a filter press according to this invention, and FIG. 2 is a partially longitudinal side view of the chamber portion. Explanation of symbols, 1... Board, 2... Cloth, 3... Chemical tank, 4... Supply pipe, 5... Chamber, 6...
Liquid outlet, 7...Return pipe, 8...Pump, 9,1
0...Header pipe, 11...Dolly, 12...Cleaning device, 14, 15, 16, 17...Switching valve.

Claims (1)

[Scope of utility model registration request] In an apparatus in which, when the cloths 2 provided between each plate 1 become clogged, these cloths 2 are cleaned at the positions where they are provided.
and a pump 8 for supplying a chemical liquid are mounted on a trolley, and the supply pipe 4 of the chemical liquid tank 3 is connected to approximately half of the adjacent filtrate discharge ports 6 among the plates 1 which are arranged in parallel via the pump 8.
..., and the return pipe 7 to the chemical solution tank 3 is connected to the remaining adjacent filtrate outlet 6..., and the chemical solution can be switched between the supply pipe 4 and the return pipe 7 as appropriate. Valve 14, 15, 16, 1
7. A cloth cleaning device for a filter press, characterized in that it is provided with a cloth cleaning device.