JPS60172389A - Treating apparatus of waste water or the like for muddy water treatment - Google Patents

Abstract

PURPOSE:To prolong the life of a pump, and to enhance the washing effect by providing a cyclone above a hermetically-structured suction tank having a cylindrical upper part and a conical lower part, and furnishing a waste liquid and water pump below the suction tank. CONSTITUTION:An electrod-type liquid level controller is provided to control the liquid level of the waste liquid in a suction tank 1. An electrode rod 13 is washed by the water which is sent from the chamber B of a cooling water tank and spouted into the protective tube 12 of the electrode in order to prevent the deposition of the precipitate on the outer circumference of the electrode 13. The muddy waste liquid accumulated at the bottom part of the suction tank 1 is taken out to the outside from the end of the cone by a waste liquid treating pump 6 which is communicated with a water and liquid supply pipe 2. The cooling liquid is sucked by a vacuum pump 3 from the central part of the upper lid of the suction tank 1 through a supply and discharge pipe 7.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a liquid suction and drainage device, and is particularly suitable for use in muddy water treatment of segment invasion in the muddy water shield method.

Currently, all devices having a structure similar to the present device for the above purpose have a vacuum pump cooling water tank consisting of one chamber.

At first glance, the suction tank in the operating body is in a state close to a special boiling state, so fine solids such as bentonite are generally used as the slurry treatment liquid, so the vacuum is lower than that in the suction tank. The suction air in the liquid supply pipe to the pump contains fine solid particles such as bentonite. As a result, the casing of the vacuum pump and the tip of the rubber impeller are worn out, and its pressure reduction performance is degraded.

Next, the fine solids contained in the waste on the suction side of the vacuum pump flow directly into the vacuum pump's drainage fluid (so if the cooling water tank is one room, the fine solids sucked into the cooling water tank will accumulate). Therefore, when this discharged liquid is used as cooling water for a vacuum pump, the amount contained in the cooling water used in the vacuum pump and the fine solids in the intake air from the Zakujo tank side will be mixed together. Since the main parts of the vacuum pump are worn out, the depressurization performance of the pump is reduced several times compared to the original method.

In view of the above-mentioned drawbacks, the present invention is designed to divide the cooling water tank into two rooms, A and B, using a partition plate. Room A, which is filled with only tap water, is used exclusively for the cooling water of the vacuum pump, and the tank is used for discharging the vacuum pump. The liquid pipe has three branches in the middle, and the upward pipe is used for exhaust air, and the downward pipe is used as a discharge cooling liquid that flows into chamber B. Next, the cooling waste liquid in chamber B is used for the liquid level control device in the suction tank. If used for cleaning electrode rods,
Due to the frictional heat between the vacuum pump casing and the rubber impeller, the temperature of the discharged cooling fluid is 10'C or more compared to before use.
Since the temperature has increased by 20"C, the effect is that more water is dissolved by the temperature increase compared to cleaning with only tap water.

Next, actual usage examples and results will be explained with reference to FIGS. 1 and 2.

At the second part of the suction link 1, which has a substantially sealed structure with a cylindrical upper part and a conical lower part, near a part that communicates with a liquid supply pipe 5 from a terminal suction pipe for draining liquid for muddy water treatment, etc. Moreover, the cylindrical cyclone 4 is provided between the center of the suction link 1 and the liquid supply pipe 5 as shown in FIG. The outlet from the cyclone 4 is located at the bottom of the cyclone 4.

A strainer 9 is provided at a distance from the lower discharge port, and its shape is approximately circular between the conical wall of the suction tank 1 and has a pit size sufficient to store solids. At the same time, a manhole 12 is installed on the corresponding cone wall.
A pit is installed, and when the pit is full, the accumulated solids are taken out from there.

The second one is used to control the level of waste liquid in the suction tank.
It has an electrode-type liquid level control device as shown in the figure, and in order to prevent precipitation on the outer periphery of the electrode rod 13, the water for purifying the outer periphery of the electrode rod 13 is sent from the cooling water tank B chamber and into the electrode protection tube. 12 to clean the electrode 13.

Next, the muddy waste liquid accumulated in the lower part of the suction tank 1 is discharged to the outside by the waste liquid treatment pump 6 which is connected to the liquid supply pipe 2 from its conical end, and the vacuum pump 3 sucks the cooling liquid. Air is taken in from the center of the upper lid of the suction tank 1 through a supply/discharge pipe 7, and on the discharge side, a supply/discharge pipe 8 is made into a three-pronged pipe in the middle, and air is discharged into the upward pipe and cooling liquid is discharged into the downward pipe. .

When this device is used in an actual field, the life of the vacuum pump will be at least twice as long as the conventional method that uses used cooling water because it uses cooling water tank A that only uses tap water. In addition, compared to the conventional method that uses only tap water for cleaning the electrode rods, the used cooling water, which has a temperature of 10 to 20 degrees Celsius, is used, so the cleaning and dissolving action of the outer periphery of the electrode rods 13 is improved accordingly. It has the effect of further improving the cleaning effect.

By performing such simple processing on piping, etc., the life of the vacuum pump can be economically extended, and the cleaning effect can be improved as well.

In short, the present invention is a suction tank 1 having a substantially sealed structure with a cylindrical upper part and a conical lower part. A cyclone 4 is provided at a point where one end communicates with the other, and the waste liquid for muddy water treatment is sucked into the suction tank 1 by a vacuum pump 3, and the liquid level of the waste liquid in the suction tank 1 is controlled. For this purpose, a control device is provided to clean the area around the electrode rod 13 with used cooling water using an electrode protection tube 12, and a suction tank 1 is also provided.
A cooling water tank 10 of a vacuum pump 3 in a wastewater treatment device for muddy water treatment etc., which is equipped with a waste liquid discharge pump 6 connected to a liquid supply pipe 2 from the lower conical end of the chamber, is divided into a room A and a room B. Room A, into which only tap water is injected, is used only for cooling water for the vacuum pump 3, and room B stores used cooling water for the vacuum pump 3 and is used only for cleaning the electrode rod 13. The particulate solids that have precipitated during operation can be seen from the bottom of the chamber.

[Brief explanation of drawings]

Figure 1 shows the main part showing the relative relationship between the cyclone and the liquid sending pipe in the suction tank. FIG. 2 is a cross-sectional view of the main parts of the device of the present invention. 1...Sakunoyon tank 2...Feeding pipe (
For discharge pump) 3...Vacuum pump 4...Cyclone 5...Feeding pipe Q For suction of collapsed waste) 6...
... Waste liquid discharge pump 9 ... Strainer - 10.
... Cooling water tank 11 ... Manhole 1
2...Electrode protection tube 13...Electrode rod A...For cooling water only B...Engraving of the drawing for discharged coolant (inner γ; 1: diamond 1屹全1屹 Procedure line 11. E extension f1159 703nvS9!It!
1. July 1980 Director-General of the Japan Patent Office 3 Address of the person making the amendment 5 Date of the amendment order May 91, 1980 (Shipping date May 29 of the same year)

Claims (2)

[Claims] (1) A suction tank that has a substantially sealed structure with a part cylindrical and a conical lower part, and one end of the liquid supply pipe from the terminal suction pipe for the waste liquid for muddy water treatment etc. is attached to the upper part. At the point where the suction waste liquid is communicated with
A cyclone is installed to eliminate the bumping phenomenon in the tank, to separate gas, liquid, and solid in an orderly manner, and to prevent fine solids from entering the vacuum pump. What is claimed is: 1. A waste liquid treatment device for muddy water treatment, characterized by having a structure in which suction is taken into the tank, and further comprising a waste liquid drainage pump connected to the conical end of the lower part of the suction tank by a liquid supply pipe. (2) The cooling water tank that uses the vacuum pump is divided into two rooms, A and B. Room A, which is filled with tap water, is used exclusively for cooling water for the vacuum pump, and is used as a liquid sending pipe for discharging the vacuum pump. The pipe has three forked pipes in the middle, and the upward pipe is used for exhaust air, and the downward pipe is used for discharged coolant that flows into chamber B. 2. The waste liquid treatment device for muddy water treatment according to claim 1, wherein the waste liquid for cooling water in the B chamber is used for cleaning an electrode rod for a liquid level control device in the suction tank.