JPH0675654B2 - Air for liquid to be treated-dehydration method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a dehydrator for separating a dispersoid in a liquid by subjecting a liquid to be treated recovered from a drain port of a filtration device to an air dehydration treatment. Regarding

<Prior Art> In a conventional air dehydrator, as shown in FIG. 2, a filtering material is stretched over the lower surface of a tank into which the liquid to be treated flows, and the filtering action is performed to perform a separation treatment. That is, a water passage plate b having water passage holes is formed on the lower bottom of the tank a, and a water passage chamber c is provided on the lower bottom of the tank so as to cover the water passage plate b. While being connected to the pipe line d, a filtering material e is stretched on the water passage plate b, and a high-viscosity liquid to be treated discharged from the drain port of the filtering device is supplied into the tank a,
The liquid to be treated is dehydrated by causing pressurized air to act on the liquid surface, permeating the filtering material e, and discharging the filtered liquid to the water passing chamber c side.

<Problems to be Solved by the Invention> By the way, in the above-mentioned conventional configuration, since the filtration separation is performed only on the bottom surface of the tank a, there is a drawback that the dehydration area is small and the efficiency is low.

The present invention aims to eliminate the above-mentioned drawbacks.

<Means for Solving Problems> In the present invention, an upper portion of a tank having a supply port for a liquid to be treated is a main storage area, a lower portion thereof is a sub storage area, and an inner side surface of the sub storage area extends from a bottom surface. A filter material is stretched to form water passage holes on the peripheral surface and the bottom surface of the sub-reservoir area, respectively. In addition to covering with a water chamber, the first water communication chamber communicates with the first pipeline, the second water communication chamber communicates with the second pipeline to form a dehydrator, and dehydration treatment is performed in the next step. It was done.

First step Fill the tank with the liquid to be treated.

Second stroke The first and second pipelines are opened, and pressurized air acts on the liquid level in the tank.

Third stroke When the liquid level reaches a position just before the boundary liquid level between the main storage area and the sub-storage area, the first pipeline is shut off.

<Operation> When the liquid to be treated is supplied into the tank in the first stroke, the first pipeline and the second pipeline are opened in the second stroke, and pressurized air acts on the liquid level in the tank, The liquid to be treated is filtered and separated by a filter material stretched from the inner side surface to the bottom side of the storage area.

This filtration separation is continued until the liquid in the main storage area is processed, and the first pipeline is shut off by the third stroke at the position just before the liquid level becomes the boundary liquid level between the main storage area and the sub-storage area. For this reason,
Even if the liquid surface is located in the sub-reservoir area, the first water passage chamber is blocked, so that air does not escape from the water passage hole on the inner side surface and the pressure in the tank is not reduced. That is, while the liquid surface is positioned in the sub-reservoir area and descends, it is filtered and separated by the filter material stretched on the bottom surface of the sub-reservoir area.

<Example> An example of the dehydrator provided for the present invention will be described with reference to the accompanying drawings.

Referring to FIG. 1, reference numeral 1 denotes an upper tank which constitutes a main storage area x, and in the center of the upper surface thereof, a supply port 3 for a liquid to be treated which communicates with a drain port of a filtrate, etc. And an air supply port 7 are provided. The supply port 3 is controlled to be opened / closed by an opening / closing valve 4, and the air supply port 7 is controlled to be opened / closed by an opening / closing valve 6.

The upper tank 1 has a funnel shape that is squeezed into a conical shape downward, and a cylindrical lower tank 8 that constitutes a sub-reservoir area y is externally fitted to the lower opening of the upper tank 1.

The inner surface of the lower tank 8 is composed of a water passage tubular plate 11 in which a large number of water passage holes 10 are formed.
A first water passage chamber 13 is formed between the water passage cylinder plate 11 and the outer frame 12 by being surrounded by 12. The outer frame 12 is formed with an outflow port 14 communicating with the first water passage chamber 13, and the outflow port 14 is connected to a first pipe line 16 whose opening / closing is controlled by an opening / closing valve 15.

Further, the bottom surface of the lower tank 8 is composed of a water passage bottom plate 18 in which a large number of water passage holes 17 are formed, and its lower portion is surrounded by a lower frame 19,
A second water passage chamber 20 is formed between the water passage bottom plate 18 and the lower frame 19.
The second water passage chamber 20 and the first water passage chamber 13 are isolated from each other. The lower frame 19 has an outlet 21 communicating with the second water passage chamber 20.
Is formed, and the outlet 21 is connected to a second pipe line 23 whose opening and closing is controlled by an opening / closing valve 22.

Inside the lower tank 8, the water passage cylinder plate 11, the water passage bottom plate 18
A filter net 24 and a filter cloth 25 are stretched over the entire inner surface of the.

The method of filtration in this configuration will be described.

First, the on-off valves 15 and 22 are shut off, and a high-viscosity liquid to be treated, in which the alkaline earth used in the filtering device, the filter material and the like are dispersed, is supplied from the supply port 3.

After the upper tank 1 and the lower tank 8 are filled with the liquid to be treated, the opening / closing valves 15 and 22 are opened and the opening / closing valve 6 is opened so that the pressurized air from the air source 5 acts on the liquid surface f. The liquid permeates the filter net 24 and the filter cloth 25 stretched from the inner surface to the bottom surface of the lower tank 8 by this air, and the filtration is separated. And on the inner surface of the water flow bottom plate 18,
The liquid flows from the water passage hole 10 of the water passage bottom plate 11 into the first water passage chamber 13 and is discharged from the first pipe line 16. Further, on the bottom surface of the water passage bottom plate 18, the liquid flows out from the water passage hole 17 of the water passage bottom plate 18 into the second water passage chamber 20 and is discharged from the second pipe line 23.

By the way, even if the liquid level f falls below the boundary liquid level 1 of the main storage area x and the sub-storage area y, if the dehydration process is attempted using the entire surfaces of the filter net 24 and the filter cloth 25, the liquid level f Below the upper end of the water passage tubular plate 11, pressure air flows into the first water passage chamber 13 through the water passage hole 10. By the way, since the liquid to be treated has a high viscosity in the first water passing chamber 13, it is not filled with the treated liquid, so this air can escape from the outlet 14 to the side of the first pipeline 16. Becomes Then, the air pressure in the upper tank 1 is significantly reduced, and the dehydrator is disabled.

Therefore, when the liquid level f comes to the position of the boundary liquid level 1, the on-off valve 15 is shut off to make the first water passage chamber 13 in a sealed state, and the water passage bottom plate
Filtration fractionation is performed using only the filter net 24 and the filter cloth 25 on 18.

The arrival of the boundary liquid level 1 is detected by a well-known liquid level detecting means, and the opening / closing valve 15 is constituted by a solenoid valve, and the opening / closing control is performed by a command from the liquid level detecting means, thereby performing the dehydration process. Automation is possible.

Thus, the liquid to be treated for the capacity of the upper tank 1 is
The entire surface of the filter cloth 25 is filtered, and the capacity of the lower tank 8 is filtered by the filter net 24 and the filter cloth 25 stretched on the bottom surface. Then, the dispersoid in the liquid to be treated is separated and remains in the dehydrator. To remove this, the lower tank 8 may be removed from the upper tank 1 and the filter net 24 and the filter cloth 25 may be taken out.

<Effects of the Invention> As described above, according to the present invention, the filtering material is stretched not only on the bottom surface but also on the peripheral surface to widen the filtering area, and most of the liquid to be treated is treated on the entire surface of the filtering material. Therefore, there is an excellent effect that the dehydration efficiency is dramatically improved.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view of a dehydrator used in the present invention, and FIG. 2 is a vertical sectional side view of a conventional dehydrator. 1; Upper tank, 3; Supply port, 4; Open / close valve, 5; Air source, 6; Open / close valve, 7; Air supply port, 8; Lower tank, 10; Water passage hole, 11;
Water passage cylinder plate, 13; First water passage chamber, 14; Outlet port, 15; Open / close valve, 16;
First conduit, 17; water passage hole, 18; water passage bottom plate, 20; second water passage chamber, 2
1; Outlet port, 22; Open / close valve, 23; Second pipe line, 24; Filter mesh, 25; Filter cloth, x; Main reservoir area, y; Sub reservoir area, l; Boundary liquid level

Claims (1)

[Claims] 1. A tank having a supply port for a liquid to be treated has an upper portion as a main storage area and a lower portion as a sub storage area, and a filter material is stretched from the inner side surface to the bottom surface of the sub storage area. Water passage holes are formed respectively on the peripheral surface and the bottom surface of the sub-reservoir area, the peripheral surface is covered from the outside by the first water passage chamber, the bottom surface is covered from the outside by the second water passage chamber, and An air dehydration method for a liquid to be treated, wherein a water chamber is communicated with a first pipeline and a second water chamber is communicated with a second pipeline to constitute a dehydrator, and dehydration treatment is performed in the next step. First step Fill the tank with the liquid to be treated. Second stroke The first and second pipelines are opened, and pressurized air acts on the liquid level in the tank. Third stroke When the liquid level reaches a position just before the boundary liquid level between the main storage area and the sub-storage area, the first pipeline is shut off.