JPS6052877B2 - separation tank - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a separation tank that is capable of handling waste materials such as oil, oil, CO2, etc.
D. Improvement of a separation tank for purifying water by separating and removing filth from wastewater contaminated with SS and molten substances (salt, pigments, etc.).

For example, a separation tank installed on a ship to purify water by removing oil from oil-containing engine cooling water must be used while circulating and purifying a limited amount of water.

For this reason, there is a need for a separation tank that can remove only the oil without discarding the water and has efficient separation capabilities. However, in the conventional separation tank, oil accumulated in the upper part of the tank (hereinafter referred to as filth) is simply discharged through a filth discharge pipe via a solenoid valve. Moreover, the cover of the separation tank has a flat top surface, and when the built-up waste is discharged due to the internal pressure of the tank, only the waste near where the discharge pipe is connected is pushed out, and as a result, There was a risk that water would also be discharged together.
In particular, when the separation tank tilted as the ship tilted, a phenomenon occurred in which the water surface reached the opening/mouth of the discharge pipe, making it easy for water to be discharged. In addition, the conventional method had problems such as poor coarsening of dirt and the coarsening member was too dirty. It is an object of the present invention to eliminate the above-mentioned drawbacks, to provide a separation tank that promotes the coarsening of waste, improves the separation performance of the waste, and does not discharge water together with the floated and separated waste. An embodiment of the present invention will be described below based on the drawings.

As shown in FIGS. 1 and 2, the separation tank includes a container-shaped tank main body 1 made of a bottomed rectangular cylinder having a sewage inlet 11a and a purified water outlet 11b on a bottom wall 11, and a cover 2 that covers the upper side of the tank main body 1. , provided between an elbow 3 for discharging dirt connected to the upper end of the cover 2, and the inlet 11a and the outlet 11b,
Also, a dirt coarsening member 6 supported by a support member 5 and a partition plate 4 that partitions the lower part of the main body 1 into an inlet side sewage rising area 1A and an outlet side purified water falling area 1b (FIG. 1), and a dirt accumulation amount. It has a detection part 7, a cleaning air pipe 8, and a drain extraction pipe 9.

A portion above the upper portion of the main body 1 becomes a floating dirt storage portion S. According to the embodiment, the cover 2 has the following features:
Two reduced diameter portions 2a and 2b are formed which are stacked in stages.

That is, the diameter of the first reduced diameter portion 2a is reduced so that the left and right side walls have a smaller diameter in the upward direction, and the upper wall is formed into a horizontal step portion 21 that blocks the upward flow of the liquid. At the center of the upper wall, the side wall forms a right cylinder, and the upper wall has a horizontal stepped portion 2 similar to the above.
2 is connected to the second reduced diameter portion 2b. Furthermore, the second
The large diameter portion of the reducing elbow 3 is connected to the center of the horizontal stepped portion 22 of the reduced diameter portion 2b. A waste discharge pipe equipped with a solenoid valve (not shown) that is opened and closed intermittently is connected to the small diameter portion of the elbow. Below the upper end of the partition plate 4. A supporting member 5 is provided horizontally at the position, and a filth coarsening member 6 (on the sewage area 1a side is 6a1
6b) is mounted and fixed on the purified water area 1b side. The filth accumulation amount detection section 7 uses a first sensor using an electrode 7a. Oil detection section 71 and second
The oil amount detection section 72 is provided in a protruding manner on the rear wall of the first reduced diameter section 2a and the upper rear wall of the tank body 1.

A pair of cleaning air pipes 8 are provided at the bottom of the tank body 1 on the left and right sides.
A connecting member 82 is connected to a U-shaped tube 81 which is closed at both ends and is installed horizontally and has a large number of air jet holes 81a on the upper surface.
Air is introduced through the A pair of left and right drain pipes 9 are provided on both side bottom walls 11 sandwiching the partition plate 4. In addition,
In the figure, 10a is a leg provided at two diagonal positions on the bottom wall 11, 10b is a dynamic vibration damping member protruding from the separation tank, and 31 is an automatic exhaust valve mounting seat.

In the above, the operating state will be explained next. The water mixed with filth is pumped under pump pressure and is sent from the inlet 11a to the inlet-side sewage area 1a in the tank. The large particles of the mixed filth in the sewage area 1a float through the wire mesh 6a due to the large buoyant force and collect near the bottom surface of the cover 2. On the other hand, fine particulate dirt with weak buoyancy is combined with other fine particulate dirt in the layer of wire mesh 6a to become coarse particles, and its buoyancy increases and it floats to the surface. The dirt collected near the bottom surface of the cover 2 is forced out through the elbow 3 by opening a solenoid valve (not shown) intermittently. However, when discharging the above, elbow 3,
In particular, since the cover 2 is reduced in diameter so that the lower part is largely open and the upper part is small in diameter, the accumulated dirt is forced out over the entire top area of the separation tank.

Moreover, in the case of a cover having such a shape, even when the separation tank is tilted by a considerable amount, there is no fear that the water surface will reach the lower opening of the second reduced diameter portion 2b and water will be squeezed out instead of waste. The water purified in this way passes through the outlet-side purified area 1b and reaches the outlet 11b.
more excreted. During this discharge, the wire mesh 6b above the purified water area 1b serves as a filth trapping material so that coarse-grained filth is not discharged. The first oil detector 71 detects that the vicinity of the bottom surface of the cover 2 is filled with dirt, the water level is lowered due to the dirt, and the interface between the water and dirt has fallen to the position of the oil amount detector 71. It senses and opens the solenoid valve of the waste discharge pipe. A second oil detector 72 also serves to control the opening of the solenoid valve when the interface drops to the installation height of the vessel. In this way, the interface is always maintained at a height between the installation positions of the first and second oil detectors 71 and 72. The cleaning air pipe 8 is for injecting air when cleaning the inside of the separation tank, causing air bubbles to associate with oil components adhering to the inside of the tank and the dirt coarsening member 6, and making them float in the form of oil lumps. be.

According to the present invention, since a wire mesh, a synthetic resin mesh, metal, and a mesh layer made of randomly laminated synthetic resin fiber bodies are used as the waste coarsening member 6, a large number of conventional plates, vibrators, etc. are combined, Compared to the method in which dirt is attached and separated, the rate of dirt adhesion is lower and cleaning is easier.

FIG. 3 shows a cross section of another embodiment in which the inside of the tank is partitioned by a cylindrical partition plate 40 and divided into an inlet wastewater area 1a and an outlet purified area 1b.

In this embodiment, an inlet 11a is provided at the center of a sewage area 1a provided in the center of the tank body 1, and a plurality of outlets 11b are provided in a purified area 1b formed around the outer periphery of the partition plate 40. Moreover, FIG. 4 is a partially cutaway side view of an embodiment of a separation tank having two tank bodies 1A and 1B that can treat a large amount of wastewater.

That is, the first separation tank 1A and the second separation tank 1B are connected by a connecting pipe 10 bent in a Z shape, and the main port 10a is located downward in the center of the first separation tank 1A, and the main port 10a is located downward in the center of the first separation tank 1A. A tip 10B is opened upward in the center. The tip 10b is wrapped with a cap-shaped wire mesh 62 for liquor use. According to the structure of this embodiment, when waste water is introduced from the inlet 11a provided at the lower corner, the waste floats to the surface and becomes coarse when passing through the wire mesh 61. Also,
The sewage is sent to the second separation tank B via the connecting pipe 10, where it is again given a coarse graining effect by the cap-shaped wire mesh 62 and is filtered. Purified water is sent out from the outlet 11b. The dirt coarsened by the wire meshes 61 and 62 is given buoyancy,
It is stored in the reduced diameter portions 20, 20, and the elbow-shaped discharge pipes 30, 3
0 and then pumped out. The reduced diameter portions 2, 20 may not be stepped as shown in FIG. In addition, the discharge pipes 3, 20
The diameter of the pipe does not necessarily need to be reduced as long as it is a curved pipe that prevents the upward jet of dirt from rising in a straight line. Since the present invention is configured as described above, water is not mixed into the waste to be removed, so water can be saved, the waste can be easily coarsened, and separation efficiency is high.

In addition, even if the separation tank tilts during use, water will not be discharged, resulting in great effects.

[Brief explanation of the drawing]

FIG. 1 is a cutaway front view showing one embodiment of the present invention, FIG. 2 is a side view, and FIG. 3 is a cross-sectional view of the tank body showing another embodiment.
FIG. 4 is a cutaway front view showing still another embodiment. 1...Tank body, 11a...Sewage inlet, 11b...
Purified water outlet, 2... Cover, 2a... First reduced diameter part, 2
b...Second diameter reducing part, 3...Reducing diameter elbow, 4...
Partition plate, 6... Dirt coarsening member, 8... Air pipe for cleaning.

Claims (1)

[Scope of Claims] 1. A sewage rising area that guides the sewage introduced from the sewage inlet at the bottom so that it flows upward, and a sewage rising area that guides the sewage introduced from the sewage inlet at the lower part so that it flows downward by changing the direction of flow of the sewage from the sewage rising area. The purified water is guided and discharged from the waste water outlet at the bottom, and the purified water descends from the area.
A separation tank that is provided above both of the areas and includes a floating dirt collection section that has an upper narrow diameter section at least in part. 2. The separation tank according to claim 1, wherein the sewage rising area and the purified water falling area are constructed in one container-shaped main body with a partition plate interposed therebetween. 3. The separation tank according to claim 1, wherein the sewage rising region and the purified water descending region are constructed in separate container-like bodies, and these container-like bodies are connected by a connecting pipe. 4. The separation tank according to claim 1, 2, or 3, wherein a filth coarsening member made of a mesh layer is provided in the sewage rising region. 5. The separation tank according to claim 4, wherein a filth filter consisting of a mesh layer is provided in the purified water descending region.