JPS6323063B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a water seepage removal device for a floating roof type storage tank that mainly stores petroleum and the like.

In general, floating roof storage tanks are often used to store petroleum and other substances at atmospheric pressure.

Floating roof type storage tanks have the disadvantage that rainwater and the like can easily enter through the sliding part between the storage tank inner wall and the floating roof and remain at the bottom of the tank through the storage tank inner wall.

Even though the bottom of a conventional tank is formed into a conical shape that gradually becomes higher toward the center, when rainwater accumulates at the bottom of the tank, it spreads around the entire circumference of the bottom plate, making it difficult to drain water from the tank. This can lead to quality abnormalities (overmoisture).

Here, an object of the present invention is to provide a floating roof storage system that automatically drains water that has entered the storage tank outside the tank, reduces the man-hours required for draining, and prevents quality abnormalities due to excess moisture. The purpose of the present invention is to provide a tank water removal device.

Therefore, in the present invention, a water guiding guide is disposed in an inclined manner over the entire inner peripheral surface of the side wall of a storage tank having a floating roof, and at the same time, water is separated from the water-containing stored liquid guided along this water guiding guide. The above object is achieved by providing a water separation means, a drainage means for discharging the water separated by the water separation means to the outside of the tank, and a reflux means for returning the stored liquid from which water has been separated into the tank. It is something.

In short, rainwater, etc. that has entered through the sliding part between the side wall of the storage tank and the floating roof is received by the water guide, allowed to flow down naturally along the slope of the water guide, and then stored via the water separation means. By draining the rainwater out of the tank, rainwater that has entered the storage tank is automatically drained to the outside, thereby reducing the number of man-hours required for draining and preventing abnormalities in the quality of the stored liquid.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 shows a schematic diagram of this embodiment. In the figure, inside a cylindrical storage tank 1 with an open top end, there is a floating roof 3 that floats up according to the liquid level of a storage liquid 2 such as petroleum stored therein.
is provided so as to be freely slidable in the vertical direction. The floating roof 3 is connected to the storage tank 1 along the outer periphery of the roof board 4.
An annular float 6 having a weather shield plate 5 that slides against the inner surface of the side wall of the storage tank 1 is provided, and a seal 7 that slides against the inner surface of the side wall of the storage tank 1 is attached along the outer periphery of the float 6. ing.

Normally, in the case of a floating roof type storage tank having such a structure, most of the rainwater, etc. that tries to enter the storage tank 1 is blocked by the weather shield plate 5 and the seal 7, but the inner surface of the side wall of the storage tank 1 There is a defect in that rainwater that enters through the gap formed in the sliding portion between the weather shield plate 5 and the seal 7 travels along the inner surface of the side wall of the storage tank 1 and accumulates on the bottom plate 8 of the storage tank 1. Therefore, in this embodiment, an annular water guiding guide 11 is arranged in an inclined manner around the entire bottom of the inner wall of the storage tank 1 to receive rainwater that enters the storage tank 1 and flows down the side wall thereof. . As shown in FIGS. 2 and 3, the water guiding guide 11 includes a first inclined portion 12 that slopes downward from the inner circumferential surface of the side wall of the storage tank 1 toward the center.
and a second inclined part 13 rising obliquely upward from the tip of the first inclined part 12 to form an approximately V
It is formed in the shape of an annular gutter having a cross-sectional shape, and is installed in an inclined manner so that the height gradually increases toward the receiving and discharging nozzle 9 provided at the bottom of the storage tank 1. As a result, rainwater that enters the storage tank 1 and flows down along its side wall is collected by the water guiding guide 11 and then naturally flows down along the slope of the water guiding guide 11.

The rainwater that has naturally flowed down to the lowermost part of the water guide 11 is collected together with the storage liquid 2 stored in the storage tank 1 by means of a water separation means provided outside the storage tank 1 by the slope of the water supply pipe 21. It is naturally flowed down to the automatic oil-water separator 22. A valve 23 and a flexible tube 24 are connected in the middle of the water supply pipe 21 . In addition, the automatic oil-water separator 22 includes the automatic oil-water separator 22
A drainage channel 25 as a drainage means for discharging the separated water to the water storage tank 41 and a circulation channel 26 as a circulation means for circulating the oil back into the storage tank 1 are provided, respectively. In the middle of the drainage channel 25, there is a liquid level gauge 2 for detecting the level of water stored inside the automatic oil/water separator 22.
A valve 28 is inserted which is opened and closed by a signal from 7. Furthermore, a pump 29 and a valve 30 are inserted in the middle of the circulation path 26 to return the oil separated by the automatic oil-water separator 22 to the storage tank 1.

With this configuration, rainwater, etc. that has entered the storage tank 1 through the gap between the side wall of the storage tank 1 and the weather shield plate 5 and the seal 7 and flowed down through the side wall is collected by the water guide 11. After flowing down naturally along the slope of the water guide 11, the stored liquid 2 flows into the water pipe 21.
The oil is sent to the automatic oil-water separator 22 through the oil water separator 22. Then, in the automatic oil/water separator 22, the storage tank 1
The water-containing storage liquid sent from the tank is separated into water and oil due to the difference in specific gravity. The separated oil is pumped to the pump 29
The water is pumped up by the tank and returned to the storage tank 1 through the valve 30. On the other hand, when the liquid level of the water separated and stored in the automatic oil-water separator 22 reaches a predetermined level, the valve 28 is opened by the detection signal from the liquid level gauge 27, and as a result, the water in the automatic oil-water separator 22 is Water storage tank 41 through drainage channel 25
is discharged to. As a result, rainwater that has entered the storage tank 1 is automatically discharged to the outside of the storage tank 1.

Therefore, according to this embodiment, the rainwater that has entered the storage tank 1 is collected by the water guide 11 and flows down by gravity, and is sent to the automatic oil-water separator 22 through the water pipe 21, where it is stored as water. Since water is separated from the liquid and discharged to the outside when the stored water level reaches a predetermined level, rainwater or the like that has entered the storage tank 1 does not stay at the bottom of the storage tank 1. This not only prevents abnormalities in the quality of the stored liquid 2, but also eliminates the need for draining, which reduces the number of man-hours required for draining.

In addition, rainwater that has entered the storage tank 1 is
The inclination of the water guide 11 and the water pipe 21 causes the water to flow down naturally, and the automatic oil/water separator 22 separates water and oil based on the difference in specific gravity, thereby preventing cloudiness that occurs when the water is transferred using the power of a pump or the like. be able to.

In addition, since the water guiding guide 11 is sloped so that it gradually becomes higher toward the receiving and discharging nozzle 9,
There is no problem in the operation of storing and discharging the storage liquid 2 through the receiving and discharging nozzle 9. Moreover, since the cross-sectional shape of the water guiding guide 11 is formed into a substantially V-shape, the water flowing down along the inner surface of the side wall of the water guiding guide 11 is collected along the slope of the water guiding guide 11, and the water flows into the first slope part 12. Since the water collects between the second inclined portion 13, that is, the inner surface of the side wall of the storage tank 1 is not in contact with the water, corrosion of the side wall of the storage tank 1 can be prevented.

In addition, in implementation, the water guiding guide 11 does not need to be configured in the annular shape described in the above embodiment, and may be configured in a spiral shape, for example, as shown in FIG. 4. In this case, it is desirable to arrange the water guide 11 in a spiral shape so as to extend around the entire circumference of the storage tank 1. Further, the cross-sectional shape of the water guiding guide 11 is not limited to the V-shape of the above embodiment, but may be a shape rising diagonally upward from the inner surface of the side wall of the storage tank 1, for example, as shown in FIG. .

Further, in the above embodiment, the automatic oil-water separator 22 was installed outside the storage tank 1, but for example, the automatic oil-water separator 22 was installed below the lowest part of the water guide 11 inside the storage tank 1 and connected to this. The water supply pipe 25 may be led out of the storage tank 1.

As described above, according to the present invention, rainwater that has entered the storage tank can be automatically discharged to the outside.
It is possible to provide a water seepage removal device for a floating roof storage tank that can reduce the number of man-hours required for draining water and prevent quality abnormalities in stored liquid.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing one embodiment of the present invention, and FIG.
Figure 5 is a perspective view showing the arrangement of the water guiding guide, Figure 3 is a sectional view showing a part thereof, Figure 4 is a partially cut away perspective view showing a modified example of the arrangement of the water guiding guide, and Figure 5 is a perspective view showing the arrangement of the water guiding guide.
The figure is a sectional view showing a modified example of the water guiding guide. DESCRIPTION OF SYMBOLS 1...Storage tank, 3...Floating roof, 9...Receiving and discharging nozzle, 11...Water guide, 12...First slope part, 1
3...Second slope part, 22...Automatic oil/water separator as water separation means, 25...Drainage channel, 26...Recirculation channel,
27...Liquid level gauge, 28...Valve, 29...Pump.

Claims (1)

[Scope of Claims] 1. A water guiding guide disposed on the inner circumferential surface of a side wall of a storage tank having a floating roof in an inclined manner over the entire circumference of the inner circumferential surface of the side wall, and water guided along the inner circumferential surface of the side wall. a water separating means for separating water from the water-containing storage liquid; a drainage means for discharging the water separated by the water separating means to the outside of the storage tank; and a draining means for discharging the water separated by the water separating means to the storage tank A water removal device for a floating roof type storage tank, characterized in that it is equipped with a reflux means for refluxing water into the tank. 2. In claim 1, the water guiding guide has a substantially V-shaped cross section that slopes downward from the inner circumferential surface of the side wall of the storage tank toward the center, and then rises upward. A water removal device for a floating roof storage tank characterized by being formed in the shape of a gutter. 3. In claim 1 or 2, the water guiding guide is arranged in an inclined manner such that the water guide becomes gradually higher toward the receiving and discharging nozzle side provided in the storage tank. Water removal equipment for floating roof storage tanks. 4. In any one of claims 1 to 3, the water separation means is constituted by an oil-water separator that separates the water-containing storage liquid into water and oil using a difference in specific gravity. A water-removal device for floating roof storage tanks featuring: 5. In any one of claims 1 to 4, the drainage means includes a drainage channel for discharging the water separated by the moisture separation means, and a valve inserted in the middle of the drainage channel. A water removal device for a floating roof storage tank, comprising a liquid level gauge that issues a signal to open the valve when the liquid level of the water separated by the water separation means reaches a predetermined level. .