JPH0422409A - Washing equipment of decompression tank in vacuum filter - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention is directed to the use of a vacuum tank in a vacuum filtration device that separates solid phase and liquid phase systems such as turbid liquids, suspensions, and various other slurries. Regarding cleaning equipment.

(Prior Art) A vacuum filtration device that separates solid phase and liquid phase systems, respectively, has a sealing lid 3 on the opening surface of an upper reduced pressure tank 2 partitioned by a filtration layer 1a of a filtration device main body I, as shown in FIG. A filtrate supply pipe 4 is connected to the airtight lid 3, and a vacuum vibro and a liquid drain pipe 7 are connected to the filtrate tank 5 at the bottom.

To filter the slurry with this vacuum filtration device, open the valve 8 of the filtrate supply pipe 4, open the valve 9 of the vacuum vibro, and operate the vacuum pump (not shown) connected to the vacuum vibro to remove the filtrate from the filtrate tank IO. The slurry is sucked into the vacuum tank 2 through the supply pipe 4, filtered through the filtration layer 2, and temporarily stored in the filtrate tank 5.
A valve 11 is opened to introduce the filtrate into a liquid storage tank (not shown).

During vacuum filtration of this slurry, when the slurry is sucked into the vacuum tank 2, the slurry is scattered and the vacuum tank 2
and the inner surface of the sealing lid 3.

To remove this deposit, the conventional sealing lid 3 is opened and
The inner surface of the vacuum tank 2 and the sealing lid 3 are cleaned by washing the bottle.

(Problems to be Solved by the Invention) By the way, the above method for cleaning a reduced pressure tank cannot sufficiently clean the tank because the water pressure is low. It also requires a lot of water.

Furthermore, if a slurry with a foul odor is filtered in order to open the airtight lid 3, the foul odor will fill the entire workplace, deteriorating the working environment.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a vacuum tank cleaning device that can sufficiently clean the tank with a small amount of water and without opening the closed lid.

(Means for Solving the Problems) In order to solve the above problems, the vacuum tank cleaning device in the vacuum filtration device of the present invention is provided on the opening surface of the upper vacuum tank partitioned by the filtration layer of the filtration device main body. In a vacuum filtration device comprising an airtight lid attached, a filtrate supply pipe connected to the airtight lid, and a pressure reduction pipe and a drain pipe connected to a lower filtrate tank, the circumferential direction of the airtight lid of the pressure reduction tank is Then, the pure water supply pipe and the air introduction pipe are connected by a three-way cock, and the pipe is branched into multiple pipes, and the pipes are connected to the multiple connection ports with a V-shaped cross section at regular intervals in the circumferential direction of the inner and outer walls. It is constructed by attaching and communicating a hollow ring with an ejection nozzle.

(Function) With the cleaning device for the vacuum tank in the vacuum filtration apparatus of the present invention configured as described above, when the slurry is sucked into the vacuum tank during vacuum filtration of slurry, the slurry is scattered and the vacuum tank is damaged. To remove deposits that have adhered to the inner surface of the vacuum tank or the inner surface of the sealing lid, supply pure water into the hollow ring provided on the sealing lid of the decompression tank with the three-way cock on the pure water supply pipe side. Once the hollow ring is filled, immediately turn the three-way cock to the air introduction pipe to introduce air and create high pressure inside the hollow ring.The pure water inside the hollow ring will be spouted out at a higher pressure than the jet nozzle, reducing the pressure. Materials that have accumulated on the inner surface of the tank and the inner surface of the sealing lid are peeled off and cleaned.

(Embodiment) An embodiment of the vacuum tank cleaning device in the vacuum filtration device of the present invention will be described with reference to FIG. The configuration of the vacuum filtration device indicated by reference numerals 1 to 11 in the figure is the same as that in FIG. 2, so the explanation thereof will be omitted.

A pure water supply pipe 1 is installed in the circumferential direction of the airtight lid 3 of the decompression tank 2.
2 and the air introduction pipe I3 are connected by a three-way cock (L type) 14 to a plurality of pipes 15, in this example, a branch pipe 15a branched into two is connected, and these four branch pipes 15
At the connection port 16 of a, a jet nozzle 1 having a V-shaped cross section and an opening angle of 40 degrees is installed on the inner peripheral wall, as shown in FIG.
Hollow ring 1 in which holes 7 are opened at intervals of 5 degrees in the circumferential direction, and horizontal jet nozzles 17' are opened in the outer circumferential wall at intervals of 5 degrees in the circumferential direction.
8 is continuous.

The cleaning device for the vacuum tank in the vacuum filtration device of the present invention configured as described above can be used in vacuum filtration of slurry.
When the slurry is sucked into the vacuum tank 2, the slurry scatters and deposits on the inner surface of the vacuum tank 2 and the sealing lid 3 are removed.After the slurry vacuum filtration is completed,
Switch the three-way cock 14 to the pure water supply pipe 12 side and supply pure water into the hollow ring 18 provided in the airtight lid 3 of the decompression tank 2. Once the hollow ring 18 is filled with pure water, immediately switch the three-way cock 14 to the pure water supply pipe 12 side. When the cock 14 is switched to the air introduction pipe 13 side to introduce air and create high pressure inside the hollow ring 18,
Pure water in the hollow ring 18 is ejected from the jet nozzle 17 to the airtight lid 3.
The slurry is ejected from the ejection nozzle 17' toward the inner surface of the vacuum tank 2, so that the slurry deposited on the inner surface of the sealing lid 3 and the inner surface of the vacuum tank 2 is peeled off and cleaned. .

(Effects of the Invention) As described above, according to the vacuum tank cleaning device of the present invention,
The inner surface of the vacuum tank and the inner surface of the airtight lid can be cleaned without opening the airtight lid, which improves work efficiency. Especially when filtering slurry with a foul odor, there is no need to open the airtight lid, which prevents foul odors from filling the work area. There is no need to worry about deteriorating the working environment. Also, since the water pressure can be increased, cleaning can be done effectively with a small amount of pure water.

[Brief explanation of drawings]

FIG. 1 is a diagram showing a vacuum filtration device equipped with a cleaning device for a vacuum tank according to the present invention, FIG. 2 is a partially enlarged sectional view of the sealing lid in FIG. 1, and FIG. It is a figure showing a vacuum filtration device. Applicant: Tanaka Kikinzoku Kogyo Co., Ltd. Figure 18...Middle! song diagram

Claims (1)

[Claims] 1) Attach an airtight lid to the opening of the upper reduced pressure tank divided by the filtration layer of the filtration device body, connect the filtrate supply pipe to the airtight lid, and connect the reduced pressure pipe and liquid drain pipe to the lower filtrate tank. In the connected vacuum filtration device, a pipe in which a pure water supply pipe and an air introduction pipe are connected by a three-way cock is branched into a plurality of pipes in the circumferential direction of the airtight lid of the decompression tank, and the plurality of A cleaning device for a reduced pressure tank in a vacuum filtration device, which is connected to a connecting port with a hollow ring having a V-shaped cross section and having jet nozzles opened at regular intervals in the circumferential direction of the inner peripheral wall and the outer peripheral wall.