JPS63151315A - Raw liquid supply method in open plate type filter - Google Patents

Abstract

PURPOSE:To enhance filtering efficiency while uniformizing the pressure of a filter chamber, by respectively forming liquid supply ports communicating with the filter chambers to both of a fixed plate and a press plate and feeding a raw liquid to both liquid supply ports under pressure in a branched state from a pressure pump. CONSTITUTION:A pressure pump 31 sucks the raw liquid from a water tank 30 to feed the same to filter chambers under pressure from liquid supply ports 27, 29 through a liquid supply pipe 32 and branch pipes 34, 35. Therefore, the water pressures of both filter chambers on the sides of the liquid supply ports 27, 29 rise equally. The raw liquid is allowed to flow in the next filter chamber through a raw liquid passing port to raise the water pressure of the filter chamber. A filter cake is accumulated on filter cloth and a filtrate is discharged to the outside through a filtrate discharge passage. The filter cake is solidified in the filter chamber. The intervals between a fixed plate 1, filter plates 9, 10 and a press plate 3 are opened by contracting the hydraulic cylinder 8 of a clamp mechanism to retract the press plate 3 and the solidified filter cake is peeled off from the filter cloth to fall.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a method for supplying a stock solution to an open plate filter such as a filter press.

Conventional technology As is well known, in open-plate filter machines, the filter plate is horizontally spaced between a fixed plate fixed vertically on the machine base and a push plate pressed by a crimping mechanism such as a hydraulic cylinder. By arranging the filter plate so as to be movable and extending the openings on both sides of the filter plate, and sandwiching the filter plate between a fixed plate and a pressing plate, chambers are formed on both sides of the filter plate, and the filter plate is normally attached to the fixed plate. A liquid supply port is provided transparently, a pressurizing pump is connected to the liquid supply port, and the stock solution is supplied from the fixed plate side.
The material is fed under high pressure through the passage chamber. The stock solution supplied to the filtration chamber on the fixed plate side also flows into other filtration chambers through a passage hole provided in the filter plate. By the way, in a filtration machine with multiple filtration chambers, the stock solution is pumped from a pressure pump to the filtration chamber on one fixed plate side, and this stock solution flows into the adjacent filtration chamber through the passage port of the filter plate. The stock solution was sent from that filtration chamber to the next filtration chamber through the passage port of the next filter plate. For this reason, as filtration progresses and filter slag accumulates on the filter cloth, making it difficult for the water to pass through the passage port, water pressure is no longer applied evenly to all chambers, which impairs the sealing performance of the seal rubber in the filtration chamber. There was a risk of water leakage or bending of the filter plate. In order to prevent this, it was necessary to use a thick and strong filter plate.One problem was that the sealing performance of reseal rubber was now strictly required, which increased manufacturing costs by 1. there were.

Purpose of the Invention This invention aims to equalize the pressure in the filtration chambers as much as possible in an open plate filtration machine having filtration chambers on both sides of the filtration plate as described in 1. The purpose is to improve the filtration efficiency by preventing the filter from getting into the chamber, eliminate the risk of destruction due to excessive pressure, and at the same time reduce the manufacturing cost I.9 Means for achieving the purpose Achieving the above purpose In order to achieve this, in this invention, liquid supply ports communicating with the filtration chamber are formed on both the fixed plate and the push plate, respectively, and the stock solution is branched and pressure-fed to the re-feed port from the pressurizing pump.

Since the stock solution is fed into both the action and fixing plate side and the push plate side, the difference in pressure applied to each filtration chamber is reduced.

An embodiment of the invention is shown in the drawings. [Symbol in the drawing] is a frame L, a fixing plate fixed vertically to one end of 2, 3 a push plate movably attached to a horizontal rail 4 fixed on the frame 2, 5 a push plate. This is a caulking mechanism that presses the The caulking machine fM5 consists of a toggle consisting of a pair of links 6°7 and a hydraulic cylinder 8, and by operating the hydraulic cylinder 8, the press plate 3 is pressed in the direction of the fixed plate 1 and the press plate 3. Filter plates 9 and 10 are movably supported by the horizontal rail 4 between them. A water passage net 1] is attached to both sides of the plates 9 and 10, and a wide cloth 12 is stretched over the water passage net 1. A flanged cylindrical fitting 13.1/1 is inserted through the center of the filter plates 9, 10 to form a stock solution passage port 15.16. 17 is 5 formed in the 5112 board
1 is a water discharge passage. A water passage net 8 is also attached to the opposing surface of the fixing plate and the opposing surface of the push plate 3, respectively.
Tiger cloth 19 is stretched.

Reference numerals 20 denote filtered water discharge passages formed in the fixed plate 1 and the push plate 3, respectively. In addition, sealing members are arranged between the fixed plate 1 and the filter plate 9, between the filter plates 9 and 10, and between the filter plate 10 and the pusher plate 3, respectively, to form filter chambers 21, 22, and 23. This sealing member is constructed by fitting a sealing rubber 25 onto the inner periphery of a frame 24 that is formed into a round frame shape by forming a member with an opening-shaped cross section into a round frame shape, and by overlapping the sealing rubber in pairs. A cylindrical fitting 26 is fitted to form a liquid supply port 27, and a cylindrical flanged fitting 28 is fitted to the center of the push plate 3 to form two liquid supply ports. 30 is a water tank for storing the stock solution, 31
is a pressure pump. Reference numeral 32 denotes a liquid supply pipe, and a branch part 33 is provided in the middle thereof, and the tips of the branch pipes 34 and 35 are connected to the liquid supply ports 27 and 29, respectively. 36 is branch pipe 34
This is a valve installed in the Note that the branch pipe 35 and the liquid supply port 2
It is connected to 9 by a flexible tube 37.

In this invention, the pressurizing pump 31 sucks the stock solution from the water tank 30 through the supply pipe 321 and branch pipe 34.
to be pumped to. The undiluted solution enters the filtration chamber 21.23, and the water pressures in both wave filtration chambers 21.23 are maintained at the same level. The stock solution in the filtration chamber 21.2'3 also flows into the filtration chamber 22 through the stock solution passage port 15.16, increasing the water pressure in the filtration chamber 22. Then) the slag is passed through the filter cloth, and the filtrate is discharged to the outside through the 'Jj Huetong Water Discharge Channel], 7.20. In this way, the filter cake solidifies in the filter chambers 21, 22, 23.

The solidified filter slag can be removed by contracting the hydraulic cylinder 8 of the crimping mechanism and moving the pusher plate 3 backward.
1.0. The intervals between the push plates 3 are widened, and the frame 24 opens in a V-shape as shown by the imaginary lines in FIG. 2, and is peeled off from the filter cloth and falls.

Although this embodiment has been described with respect to a filter having three filtration chambers, it goes without saying that the present invention can be applied to a filter having two or more filtration chambers.

Effects of the Invention As described above, the present invention divides the stock solution pumped by the pressure pump into three directions, so that the stock solution is simultaneously sent to the filtration chamber from both the fixed plate side and the push plate side, and allows multiple filtration processes. Since the pressure of the stock solution applied to the chamber is averaged and the pressure difference is reduced, the following effects are achieved.

B. Unlike conventional methods, excessive pressure is applied only to the raw solution feeding side, which destroys the seal of the filtration chamber and deforms the filter plate.90.Durability is improved. The need for strength, etc. is reduced, and manufacturing costs can be reduced.

C. Pressure is applied evenly to each filtration chamber, allowing effective use of the filtration area of the entire filter, improving filtration efficiency.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of the entire filter showing an embodiment of the present invention, and FIG. 2 is an enlarged sectional view of the main parts of this filter. DESCRIPTION OF SYMBOLS 1... Fixed plate, 3... Push plate, 5... Caulking mechanism, 9
,10...filter plate, 1.2.19...filter cloth, 15.16
... Raw solution passing [J, 21.22.23... Filtration chamber,
27.29...Liquid supply port, 31...Pressure pump, 32...
...Liquid supply pipe, 3 Procedural amendments (method) March 20, 1985 1, Case description 1988 Patent Application No. 299292 2, Title of invention Method for supplying stock solution in open plate filter machine 3, Amendment Relationship with the patent applicant case: Patent applicant 4, Date of amendment order: February 24, 1985 - Date 5, Subject of amendment: Drawings

Claims (1)

[Claims] A filter plate having filter cloth stretched on both sides is interposed between a fixed plate and a pressing plate, and the pressing plate is pressed by a crimping mechanism, so that filtration chambers are formed at least on both sides of the filter plate. In the open-plate filtration machine, liquid supply ports communicating with the filtration chamber are formed on both the fixed plate and the push plate, and the stock solution is branched and pressure-fed from the pressurizing pump to both of the liquid supply ports. A method for supplying stock solution in an open plate filter.