JPS60161789A - Apparatus for treating waste solution such as muddy water - Google Patents

Abstract

PURPOSE:To prevent bumping in a tank and to shorten the cleaning time of the waste solution in the tank, in the titled apparatus equipped with a suction tank, by providing a cyclone to the communication place of the waste solution sucking pipe in the tank while providing a drain pump so as to bring the same into communication with the lower part of the aforementioned tank. CONSTITUTION:A terminal suction pipe of a waste solution is provided to the upper part of a suction tank 1 having an almost hermetically sealed structure consisting of an upper cylindrical part and a lower conical part and a cylindrical cyclone 4 is provided in the vicinity of the place communicated with the solution feed pipe 5 from said terminal suction pipe so as to be positioned between the central part of said tank and the pipe 5. By this constitution, the bumping phonomenon generated in the slag stream sucked into the tank 1 by the sucking action of a vacuum pump 3 can be reduced to a large extent and gas, a liquid and a solid 2 are systematically separated to prevent the penetration of the fine solid into the pump 3. In addition, because the waste solution accumulated in the lower conical end of the tank 1 is discharged by a drain pump 6 through a feed pipe 2, a cleaning time required in removing the waste solution in the tank 1, after work is finished, can be shortened to a large extent.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a liquid suction/drainage device 12, which is particularly suitable for treating mud in a segment invert in the mud shield method.

Currently, for the above purpose, all devices with a similar configuration to the Motoyama W4 device are equipped with a suction tank or a secondary tank for separating gas, liquid, and solids in the suction tank, and guide the suction and waste water to the center of the tank. Solid from the bottom of the gas,
The liquid was guided and separated.

In either case, regarding the shape of the location where the raw wastewater from the terminal suction pipe enters the suction tank, the suction pipes for suction and discharge are almost never placed on the same water surface, The height of the suction pipe that communicates with the suction tank is quite high, and the suction pipe itself in the middle is also normally equivalent to a high g:c difference of 4, while the terminal suction pipe is always Since a phase amount of air is being sucked in, the suction water is constantly being sucked into the suction tank as an intermittent slag flow, so bumping occurs in the suction tank, and the extent of the bumping is comparable from beginning to end. It's changing.

Therefore, the solids in the suction tank,
Liquid components do not sink but exist in a suspended state, so in a normal secondary tank for gas-liquid separation, a considerable amount of the contained components are in a suspended state, and a fine film settles in the chamber diameter of the liquid level control device. It stuck and made it impossible to control the liquid level.

This had the disadvantage that a considerable amount of particles were sucked into the vacuum pump, shortening the pump's service life.

In view of the above points, the present invention utilizes the inflow speed of the slag flow suction and waste water sucked into the suction tank.
The peripheral wall of the cyclone is cut into pieces, and each component is separated into solid, liquid, and gas depending on the difference in content, and then discharged in the vertical direction. This eliminates the bumping phenomenon in the suction tank, which is a drawback of the current method. This is what he is doing.

Next, a strainer is installed below the cyclone, and its shape is approximately conical between the suction tank and the suction tank. A manhole is installed on the wall of the circular gutter so that accumulated solid matter that has settled can be taken out at any time.

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

At the upper part of the suction tank, which has a substantially sealed structure with a cylindrical upper part and a diary-shaped lower part, the part communicates with the supply liquid pipe 5 of the terminal suction pipe for waste liquid for muddy water treatment, etc. In addition, a cylindrical cyclone pipe can be installed nearby, as shown in Fig. 1, between the center of the suction tank/water supply pipe 5 and the center line of the water supply pipe 5 can be placed on the circumferential wall of the cyclone l. Then, the outlet from the cyclone I is provided on the upper and lower surfaces. A strainer 9 is provided at a distance from the lower discharge port, and its shape forms a roughly circular bag shape between the wall of the circular wall of the suction tank, and the size of the bit is such that it can store enough solids. At the same time, a manhole/7 is provided on the rough wall of the relevant circle, and the lower end of the suction tank/7 from which the accumulated solids are taken out when the bit is full is connected to the Q supply liquid pipe. The waste liquid treatment pump discharges the liquid to the outside, and the vacuum pump 3 sucks the cooling liquid from the cooling tank 9 and Q, and draws air from the center of the suction tank/top lid through the supply and discharge pipe 7. Air and cooling liquid are discharged from the supply pipe 8.

When this device is actually used in the field to confirm the effect of the cyclone, the difference will occur depending on the relative positional difference between the cyclone and the terminal suction pipe 5 in the suction tank and the conditions of use at the site. In order to determine the extent of the bumping phenomenon within the vacuum pump 3, the accumulated amount of subsidence at the tip of the electric section 8i of the chamber diameter type liquid level control device and the amount of suction into the cooling tank 10 are determined. The amount precipitated and discharged is Q
Comparing estimates, it is approximately I/2 to I73.

All of the waste liquid that has accumulated in the circular shaft of the suction tank/ is discharged via the liquid supply pipe a by the waste liquid treatment pump B, and is returned to the suction tank/ after the work is completed like in the past. The waste liquid is removed from the Q. Cleaning time is greatly reduced.

Solids with relatively large diameters, textile products such as gloves, wood chips, etc. are separated and precipitated in the pint between the strainer ~ 9 and the wall of the Nikko mine, and taken out from the man ball// by the conventionally used suction・A comparatively smaller manhole can be used than the one used for tanks, making it easier to open and close, and the maintenance cost is 5 monme, making it all economical.

In short, this patent provides a cyclone in the upper part of a suction tank that has a substantially sealed structure with a cylindrical upper part and a conical lower part to suppress the bumping phenomenon caused by the slab flow sucked into the suction tank. A strainer 9 is provided at the bottom of the cyclone with a large width, and a bit is formed between it and the corresponding circular part, and the solids accumulated in the bit are removed through the manhole. - The waste liquid for muddy water treatment is taken out and sucked into the suction tank using a vacuum pump, and the waste liquid that has accumulated at the conical end at the bottom of the suction tank is pumped outside by the waste liquid treatment pump via the feed pipe. It has a structure that allows liquid delivery.

[Brief explanation of drawings]

Figure 1 shows the factors showing the relative relationship between the cyclone and the liquid sending pipe in the suction tank. FIG. 2 is a longitudinal cross-sectional view of the main parts of the device of the present invention. ／・−・Suction/Tank Yu...Feeding pipe (for discharge pump) 3...Vacuum pump 11, cyclone 5, Kaiken feeding pipe (for terminal suction) and...Waste liquid discharge pump 7... Feed pipe (for vacuum pumps) 8... Feed V (for vacuum pump discharge) 9... Strainer - 10... Cooling water tank //... Manhole procedure amendment letter submitted on 10J115, 1982 October 1980 Mr. Commissioner of the Japanese Patent Office, small case indication 1980 Patent application No. 01F519
2. Title of the invention: Waste liquid treatment device for muddy water treatment 3. Person making the amendment (shipment date: October 2 of the same year) 5. Subject of the amendment (1) “Detailed description of the invention” in the specification
Item 6, Contents of the amendment (1) Page 2, line 6, “3. Detailed description of the invention” is corrected to “3. Detailed description of the invention” (2) Figures 1 and 2 of the drawings” Replace all pages with

Claims (1)

[Claims] 1) Approximately V with a cylindrical upper part and a solid lower part! This is a suction tank with a sealed structure, and the upper part of the suction tank is connected to the supply liquid pipe from the terminal suction pipe for waste liquid for mud treatment, etc., to prevent bumping of the suction waste liquid in the suction tank. A cyclone is installed to eliminate this phenomenon, to separate gases, liquids, and solids in an orderly manner, and to prevent solids from entering the vacuum pump. With and without configuration. Furthermore, the apparatus is characterized in that it is equipped with a waste pump which is connected to the end of the lower part of the suction tank by a Q supply pipe. 2) At the center of the cyclone, install a suction pipe that communicates with the suction tank after cutting the post-nuclear waste suction pipe, so that its center line remains as close to the circumferential wall of the cyclone as possible. The discharge port is provided on the upper and lower surfaces, and a strainer is provided on the lower surface of the strainer, and its shape is approximately circularly oblique between the wall surface of the solid part of the suction tank and is designed to store enough solids. Similarly, the claim is characterized in that a manhole is provided on the corresponding diary wall surface to take out the settled accumulated solids.