JPH0742482Y2 - Oil water separator - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to an oil / water separator, and in particular, for treating oil bilge generated in an engine room in ships, that is, in ships and marine structures. The present invention relates to an oil-water separator suitable for separating oil from bilge water, not separating water.

[Conventional technology]

Conventionally, many types of oil-water separators are known, but for example, regarding the treatment of oil bilge generated in an engine room in a ship or an offshore structure,
Oil water (bilge water) is once stored in the bilge tank and sent by a bilge separator pump to an oil water separator with multiple elements, where it is separated into oil and water, and the oil content is led to a separate bilge oil tank, and the water content The method of returning to is adopted.

[Problems to be solved by the device]

However, in the above oil-water separator, the elements are often clogged, maintenance and inspection are troublesome, and the structure has many narrow spaces, so once oil is passed, an oil film will adhere and performance will deteriorate, and the bilge separator pump However, since a fluid that is neither water nor oil flows, there is a problem that a seizure accident of the pump portion occurs and stable long-term operation cannot be performed. In addition, there is a limitation in the method of separating only the water from the bilge water and discharging the water out of the ship using the above oil-water separator, so that there is a problem that the treatment amount is significantly limited.

It is an object of the present invention to provide an oil / water separation device that is unlikely to cause clogging or failure, has no deterioration in performance, and is capable of stable long-term operation.

[Means for Solving the Problems]

To achieve the above object, the present invention comprises an oil / water separation tank, and a seawater supply pipe, an oil / water supply pipe, and an oil discharge pipe which are respectively connected to the oil / water separation tank and are provided at different levels in order from bottom to top. And a seawater discharge pipe communicating with the oil-water separation tank and provided at substantially the same level as the seawater supply pipe, and further, outside the oil-water separation tank, a seawater supply valve is provided in the seawater supply pipe. An oil water supply valve is provided in the oil water supply pipe, an oil discharge valve is provided in the oil discharge pipe,
The seawater discharge pipe had a seawater discharge valve.

[Action]

According to the present invention, the seawater supply pipe, the oilwater supply pipe, and the oil discharge pipe are connected to the oil / water separation tank at different levels from bottom to top, and the seawater discharge pipe is at substantially the same level as the seawater supply pipe. Since each of the pipes has a seawater supply valve, an oil-water supply valve, an oil discharge valve, and a seawater discharge valve, the oil-water separation process is performed by the following operation.

First operation: The seawater supply valve, the oil discharge valve, and the seawater discharge valve are all closed, the oil / water supply valve is opened, and the oil / water to be separated is injected from the oil / water supply pipe into the oil / water separation tank.

Second operation: When the amount of the injected oil water in the oil / water separation tank reaches an appropriate amount, the seawater replenishment valve is opened and replenishment seawater is injected into the oil / water separation tank from the oil / water replenishment pipe. Then, in the oil-water separation tank, the supplemental seawater becomes the lower layer and the oil content becomes the upper layer due to the difference in specific gravity between the oil and the seawater. Further, when the supplemental seawater is injected from the seawater supplementary pipe, the supplemental seawater pushes up the oil while maintaining the relationship between the lower layer and the upper layer.

Here, regarding the oil content of the upper layer, the upper layer is the high-concentration oil layer and the lower layer is the low-concentration oil layer, due to the difference in specific gravity.

Third operation: When the high-concentration oil layer reaches the oil discharge pipe, the oil discharge valve is opened, and the supplemental seawater is continuously injected from the seawater supply pipe, and the oil component of the high-concentration oil layer is discharged from the oil discharge pipe. Let it drain.
After this, the seawater supply valve, the oil water supply valve, and the oil discharge valve are closed.

Fourth operation: The seawater discharge valve is opened to discharge the lower-layer seawater in the oil-water separation tank into the sea from the seawater discharge pipe by its own weight. When this discharge amount reaches a predetermined amount, that is, when the water level in the oil-water separation tank reaches a predetermined position, the seawater discharge valve is closed.

One cycle is completed by performing the above first to fourth operations. The next cycle starts from the first operation described above.

〔Example〕

 FIG. 1 shows a first embodiment of the present invention.

In the figure, 1 is an engine deck, 2 is an oil-water separation tank installed on the engine deck 1, and 3 is a seawater supply pipe connected to a part of a seawater service system of a ship having a not-shown normal operation pump. Reference numeral 4 is an oil water supply pipe for supplying oil bilge generated in an engine room (not shown), 5 is an oil discharge pipe, 6 is a seawater discharge pipe for discharging seawater to the outside of the ship, and 7 is provided in the seawater supply pipe 3. Seawater supply valve, 8 is the oil water supply pipe 4
An oil water supply valve provided at 1, an oil discharge valve provided at the oil discharge pipe 5, a seawater discharge valve provided at the seawater discharge pipe 6, an oil detector 11 and an incinerator discharge 12 A tank, 13 is a separated oil storage tank, 14 is a U-seal part provided in the middle of the seawater discharge pipe, 15, 16 and 17 are air vent pipes, 18 is a seawater layer in the oil / water separation tank 2, and 19 is also a low Concentration oil layer, 20 is also a high concentration oil layer.

The seawater supply pipe 3, the oil / water supply pipe 4, and the oil discharge pipe 5 are
It is connected to the oil / water separation tank 2 and provided at different levels in order from bottom to top. The seawater discharge pipe 6 is connected to the oil / water separation tank 2 and is provided at almost the same level as the seawater supply pipe 3. Seawater supply valve 7, oil water supply valve 8, oil discharge valve 9,
All the seawater discharge valves 10 are located outside the oil / water separation tank 2, and the U-seal portion 14 of the seawater discharge pipe 6 is equipped with a sif-on breaker.

The internal volume of the oil / water separation tank 2 is preferably about 10 cubic meters and the height is about 2 meters, and the height position of the U-seal portion 14 is preferably about 1/2 of the height of the oil / water separation tank 2.

In the oil / water separation device configured as shown in FIG. 1, the oil / water separation process is performed by the operation as shown in FIGS. 2 to 5.

First operation: As shown in FIG. 2, the oil content detector 11 is adjusted so as to form the low-concentration oil content layer 19, and the automatic control panel 21 is automatically operated. Then, the seawater supply valve 7, the oil discharge valve 9, and the seawater discharge valve 10 are all closed, and the oil-water supply valve 8 is opened, so that the oil-water (oil bilge) to be separated is separated from the oil-water supply pipe 4 by the oil-water separation tank 2
Inject into.

Second operation: As shown in FIG. 3, when the high-concentration oil layer 20 of the injected oil water in the oil-water separation tank 2 is at the oil detector 11,
The seawater supply valve 7 is opened, and the supply seawater is injected from the seawater supply pipe 3 into the oil / water separation layer tank 2 by the discharge pressure of a not-shown normal operation pump. Then, in the oil-water separation tank 2, the supplemental seawater becomes the lower layer and the oil content becomes the upper layer due to the difference in specific gravity between the oil and the seawater. Further, when the supplemental seawater is injected from the seawater supplementary pipe 3, the supplemental seawater pushes up the oil content while maintaining the relationship between the lower layer and the upper layer.

Here, regarding the oil content of the upper layer, the upper layer is the high-concentration oil layer 20 and the lower layer is the low-concentration oil layer 19 because of the difference in specific gravity.

When the high-concentration oil layer 20 reaches the oil discharge pipe 5, the oil discharge valve 9 opens.

Third operation: As shown in FIG. 4, the oil discharge valve 9 is opened, and the supplemental seawater is continuously injected from the seawater supplementary pipe 3 to generate the high-concentration oil layer 20.
Is pushed up, and the oil content of the high-concentration oil layer 20 is discharged from the oil discharge pipe 5. After this, when the oil content detector 11 becomes the low-concentration oil layer 19, the seawater supply valve 7, the oil water supply valve 8 and the oil discharge valve 9
But both are closed.

Fourth operation: As shown in FIG. 5, the seawater discharge valve 10 is opened, and the seawater in the lower layer in the oil / water separation tank 2 is discharged from the seawater discharge pipe 6 to the sea surface 22 by its own weight, and the oil / water separation tank 2 is discharged. When the level of the seawater therein drops to the same level as the sea level 22, its discharge ceases, where the seawater discharge valve 10 closes.

One cycle is completed by performing the above first to fourth operations. The next cycle starts from the first operation described above.

Thus, when the oil concentration becomes high by the oil content detector 11 that detects the oil content of the oil layer in the oil / water separation tank 2, the supplemental seawater is injected from the seawater replenishment pipe 3 to obtain a high-concentration oil content.
When discharged to the outside and the concentration becomes low, the seawater supply valve 7 is closed and the inside of the tank 2 is again in a state where the settling effect can be gasified. Therefore, without the need for a troublesome element type oil-water separator and a dedicated pump,
In the oil-water separation tank 2, the oil content is floated above the sea surface and separated by utilizing the difference in specific gravity between sea water and oil, so that reliable oil-water separation can be easily performed. Further, since the seawater discharge pipe 6 is provided with the U-seal portion 14, oil is not discharged to the outside of the ship.

FIG. 6 shows a second embodiment of the present invention. Further, in FIG. 6, a part of the illustration is omitted.

In the second embodiment, there is no oil detector and automatic control panel, and each main valve is manually operated, and the operation sequence is almost the same as that described with reference to FIGS. 2 to 5. .

However, in the second embodiment, a first oil detection valve 23 and a second oil detection valve 24 are provided at locations corresponding to the oil content in the oil / water separation tank,
A first seawater discharge valve 25 and a second seawater discharge valve 26 are provided at locations corresponding to seawater, and a high level alarm is provided at locations corresponding to the top.
27 is provided.

[Effect of device]

According to the present invention, the seawater supply pipe, the oilwater supply pipe, and the oil discharge pipe are connected to the oil / water separation tank at different levels from bottom to top, and the seawater discharge pipe is at substantially the same level as the seawater supply pipe. , And each of the pipes has a seawater supply valve, an oil-water supply valve, an oil discharge valve, and a seawater discharge valve, so that by operating each of the valves, the seawater is separated in the oil-water separation tank. The oil content can be floated above the sea surface and separated by utilizing the difference in specific gravity between the oil and oil.Therefore, it is not necessary to use an Ement type oil-water separator having a narrow part with a trouble-prone structure, and the oil film There is no deterioration in performance due to adhesion, there are few places that break down, maintenance and inspection are easy, and since oil is separated rather than water is separated, only high-concentration oil can be easily and reliably ensured. The oil-water separation tank Al is to be able to discharge, also supply seawater Zumi use exhibits various effects such as can be discharged from the oil-water separation tank by gravity.

[Brief description of drawings]

FIG. 1 is a sectional front view showing a first embodiment of the present invention, and FIG.
The figure is a sectional front view for explaining the first operation of the oil-water separator of FIG. 1, FIG. 3 is a sectional front view for explaining the second operation, and FIG. 4 is the same for the third operation. 5 is a sectional front view for explaining the fourth operation, and FIG. 6 is a partially cutaway sectional front view showing a second embodiment of the present invention. 1 ... Engine deck, 2 ... Oil-water separation tank, 3 ... Seawater supply pipe, 4 ... Oil-water supply pipe, 5 ... Oil discharge pipe, 6 ... Seawater discharge pipe, 7 ... Seawater supply valve, 8 ... … Oil water supply valve, 9 ……
Oil discharge valve, 10 ... Seawater discharge valve, 11 ... Oil detector, 14 ...
… U seal, 18 …… Seawater layer, 19 …… Low concentration oil layer, 20 ・ ・ ・
… High concentration oil layer, 21 …… Automatic control panel, 22 …… Sea level.

Claims (4)

[Scope of utility model registration request] 1. An oil-water separation tank, and a seawater supply pipe, an oil-water supply pipe, and an oil discharge pipe, which are respectively connected to the oil-water separation tank and are provided at different levels from bottom to top, respectively. A seawater discharge pipe communicating with the tank and provided at substantially the same level as the seawater replenishment pipe is provided, and further, outside the oil / water separation tank, a seawater replenishment valve is provided in the seawater replenishment pipe, and the oil / water supply pipe is provided. Oil and water supply valve,
An oil / water separator, wherein the oil discharge pipe has an oil discharge valve and the sea water discharge pipe has a sea water discharge valve. 2. The oil / water separator according to claim 1, further comprising an oil content detector for detecting the concentration of oil in the oil / water separation tank between the oil / water supply pipe and the oil discharge pipe. 3. The oil-water separator according to claim 1, which has a U-seal portion in the middle of the seawater discharge pipe. 4. An oil / water separation tank is installed on an engine deck of a ship, and a seawater supply pipe is connected to a part of a seawater service system line of the ship having a regularly operating pump, in an engine room of the ship. The oil bilge generated is arranged so as to be supplied from an oil water supply pipe to an oil water separation tank.
The oil-water separator according to 2 or 3.