WO2007057955A1

WO2007057955A1 - Oily water separator

Info

Publication number: WO2007057955A1
Application number: PCT/JP2005/021096
Authority: WO
Inventors: Masaaki Okuda; Kiyohiro Azuma
Original assignee: Seiwa Pro Co., Ltd.
Priority date: 2005-11-17
Filing date: 2005-11-17
Publication date: 2007-05-24
Also published as: CN101072613A; TW200720196A

Abstract

An oily water separator that is capable of increasingly secure and efficient separation between water and oil. Oily water separator (1) includes vessel body (11) for separating of wastewater into oil (B) and water (cleaned water) (C), which vessel body (11) has its interior partitioned into four tanks consisting of first tank (11a), second tank (11b), third tank (11c) and fourth tank (11d), and supply pipe (21) having its one end arranged so as to open at a bottom portion of the first tank (11a). Further, the oily water separator (1) includes wastewater supply means (20) for feeding of wastewater from the opening of the supply pipe (21) into the first tank (11a), oil recovery means (25) for recovering of the oil (B) retained above the cleaned water (C) into the side of fourth tank (11d) and discharging of the same outside, and outlet duct (30) for discharging of the cleaned water (C) within the third tank (11c) outside by the pressure of water (C) and oil (B) within the vessel body (11). The first tank (11a) and the second tank (11b) are partitioned from each other by means of first partition member (12) in such a fashion that upper portions thereof communicate with each other. The second tank (11b) and the third tank (11c) are partitioned from each other by means of second partition member (13) in such a fashion that bottom portions thereof communicate with each other.

Description

Oil / water separator

Technical field

TECHNICAL FIELD [0001] The present invention relates to an oil / water separator that also separates and discharges oil from mixed hydraulic power containing oil.

Background art

[0002] For example, wastewater discharged from kitchen power at restaurants and the like contains oil, and if this wastewater containing oil is discharged into rivers and the sea as it is, it causes environmental pollution. The oil in it is separated and removed as appropriate. Conventionally, for example, an oil-water separator as shown in FIG. 3 has been known as one that efficiently separates and removes such oil (see Japanese Patent No. 3368426).

As shown in FIG. 3, the oil / water separator 100 includes a container body 101 for separating oil B and water C in drainage, and a supply mechanism 103 for supplying wastewater into the container body 101. And an oil recovery mechanism 106 that recovers oil B separated from the wastewater, and a discharge mechanism 110 that discharges moisture C separated from the wastewater to the outside as purified water.

[0004] The inside of the container body 101 is partitioned into a first tank 101a and a second tank 101b by a partition plate 102 having a vertical portion 102a and an inclined portion 102b. Wastewater is supplied into the first tank 101a by the supply mechanism 103, and the upper part of the first tank 101a protrudes laterally.

[0005] The supply mechanism 103 has one end connected to the inside of the first tank 101a, and the one end is near the inclined portion 102b of the partition plate 102 and the surface layer portion of the purified water C in the first tank 101a. A supply pipe 104 connected to a recovery tank (not shown) into which waste water discharged from a kitchen such as a restaurant flows in is disposed near the boundary between oil B and moisture C, A supply pump (not shown) for supplying wastewater in the collection tank (not shown) into the first tank 101a from the opening on the one end side of the supply pipe 104, and in front of the opening on the one end side of the supply pipe 104 The baffle plate 105 is arranged and makes the flow of the drainage discharged from the opening laterally.

[0006] The oil recovery mechanism 106 is disposed below the protrusion of the first tank 101a, a recovery pipe 107 connected to the lower surface of the protrusion of the first tank 101a, a recovery valve 108 provided in the recovery pipe 107, and The discharge mechanism 110 is provided at the top and bottom with the upper part disposed in the second tank 101b and the lower part disposed at the bottom of the first tank 101a. A second discharge pipe 112 is connected to the bottom of the second tank 101b on the side, and connected to the recovery tank (not shown) on the other end.

[0007] According to the oil / water separator 100 configured as described above, a collecting tank (not shown) supplies and discharges the force at one end of the supply pipe 104 into the first tank 101a by a supply pump (not shown). The waste water in the tank (not shown) is separated into oil B and water (purified water) C in the first tank 101a due to the difference in specific gravity (oil B is separated on the upper side and water C is separated on the lower side). )

[0008] After the purified purified water C is separated and circulated through the first discharge pipe 111 by the oil B in the first tank 101a and the pressure from the purified purified water C, it is guided to the second tank 101b side. Then, it circulates in the second discharge pipe 112 and returns to the recovery tank (not shown). On the other hand, the separated oil B is circulated through the collection pipe 107 and collected in the collection container 109 when the collection valve 108 is opened.

[0009] In this manner, the waste water circulates between the recovery tank (not shown) and the container body 101, and the oil B and the moisture C are separated in the container body 101, thereby allowing the recovery tank (FIG. Oil B is removed from the wastewater in the tank (not shown), and the drained water after oil removal is drained from the collection tank (not shown) to rivers and seas.

[0010] Patent Document 1: Japanese Patent No. 3368426

Disclosure of the invention

Problems to be solved by the invention

[0011] However, in the conventional oil-water separator 100, since one end of the supply pipe 104 is disposed on the surface layer portion of the purified water tank, the opening force at the one end side of the supply pipe 104 is also discharged. The purified water C in the surface layer is agitated by the drainage, and once separated oil B is mixed with the purified water C, and the purified water C mixed with this oil B is discharged from the discharge pipes 111 and 112 to the outside. There is a problem of being discharged. On the other hand, if the supply amount of the wastewater supplied from the supply pipe 104 is reduced, such a problem can be prevented, but another problem that the processing efficiency is lowered is caused.

[0012] In addition, since oil B is separated only in the first tank 101a, the oil B cannot be reliably separated, and the purified water C incompletely separated from the oil and water is discharged into each discharge pipe 111. , 112 to outside There is also a problem of being discharged.

[0013] The present invention has been made in view of the above circumstances, and is an oil-water separation capable of separating oil and water more reliably and efficiently and discharging purified purified water not mixed with oil. Its purpose is to provide equipment.

Means for solving the problem

[0014] To achieve the above object, the present invention provides

Mixed hydraulic power containing oil An oil / water separator that separates and discharges oil, and is divided into three tanks, a first tank, a second tank, and a third tank, arranged in parallel in the lateral direction. A container body for separating the oil and water from the container, a mixed water supply means for supplying the mixed water into the container body, an oil collection means for recovering the oil separated from the mixed water, and the mixing And a discharge pipe for discharging the water separated from the water as purified water to the outside,

The container body is partitioned by a first partition member so that the tops of the first tank and the second tank are communicated with each other by a second partition member so that the bottom sides of the second tank and the third tank are in communication with each other. At least a part of the upper part of the partition member is formed lower than the liquid surface height position of the purified water with a ceiling surface force interval.

The mixed water supply means has a supply pipe arranged so that one end side thereof is connected to the first tank and the one end part is opened at the bottom of the first tank. Configured to supply the mixed water into the first tank;

The oil recovery means is connected to the first tank and is configured to recover oil above the purified water,

The drain pipe is connected to an upper part of the third tank, and is configured to be able to discharge the purified water in the third tank by the pressure of oil and moisture in the container body. Concerning.

[0015] According to the present invention, the mixed water supplied into the container by the supply mechanism at one end side opening force of the supply pipe is from the bottom of the first tank to the upper part of the first tank, the upper part of the second tank, It flows to the bottom of the 2nd tank, the bottom of the 3rd tank, and the top of the 3rd tank and is discharged from the discharge pipe, but is separated into oil and moisture due to the difference in specific gravity in the 1st and 2nd tanks ( Oil is on the top and water is on the bottom The separated water (purified water) is discharged from the third tank to the outside of the container through the discharge pipe by the pressure of oil and moisture in the container.

On the other hand, the separated oil is recovered from the first tank by the oil recovery means and discharged outside the container body. The oil separated in the second tank is formed such that at least a part of the upper part of the first partition member is formed lower than the liquid surface height position of the purified water with the ceiling surface force spaced apart. Since the upper part of the first tank is in communication, it is collected together with the oil in the first tank.

[0017] Thus, according to the oil / water separator according to the present invention, the one end of the supply pipe having one open end is disposed at the bottom of the first tank, and the mixed water is supplied to the first through the opening. Since the water is supplied into the tank, even if the supply amount of the mixed water is increased, the oil separated from the oil separated by the supply of the mixed water (purified water) as in the conventional oil-water separator described above. It is possible to separate the oil and water more reliably and efficiently, and to output purified water that does not mix with oil.

[0018] Further, the first partition member is partitioned so that the upper portions of the first tank and the second tank communicate with each other, and the second partition member is partitioned so that the bottom side of the second tank and the third tank communicate with each other. One end is placed at the bottom of the first tank, and the mixed water (purified water) is the bottom force of the first tank. The upper part of the first tank, the upper part of the second tank, the bottom part of the second tank, the third tank Since it was allowed to flow to the bottom and the upper part of the third tank, oil can be separated in the two tanks, the first tank and the second tank, and the process for separating oil and water (the first tank and the second tank). (Each flow distance in the tank) can be lengthened, and this also ensures that oil and water are separated more reliably and efficiently, and clean water that does not mix oil is discharged to the outside. Can do.

[0019] It should be noted that at least the first tank and the second tank are arranged in a row in the horizontal direction, and the ceiling surfaces of the first tank and the second tank are inclined so that the second tank side is lowered. A part thereof may be arranged in the purified water.

[0020] According to this configuration, the oil content in the second tank is shifted to the first tank side due to the inclination of the ceiling surfaces of the first tank and the second tank, or the oil content in the first tank is reduced to the second level. As the tank is close to the tank side, the amount of oil in the second tank can be reduced, or the separated oil can be prevented from flowing from the first tank side to the second tank side. It is possible to prevent the oil component from flowing into the third tank along with the purified water and being discharged to the outside. The invention's effect

[0021] As described above, according to the oil / water separator according to the present invention, the mixed water is supplied from the bottom of the first tank, and from the bottom of the first tank, the upper part of the first tank and the second tank Since it flows to the top, the bottom of the 2nd tank, the bottom of the 3rd tank, and the top of the 3rd tank, it is discharged to the outside of the 3rd tank so that clean purified water that does not contain oil is efficiently Can be discharged. In addition, if the ceiling surfaces of the first tank and the second tank are inclined, the oil can be further prevented from flowing out. Brief Description of Drawings

FIG. 1 is a cross-sectional view showing a schematic configuration of an oil / water separator according to an embodiment of the present invention.

FIG. 2 is a side view in the direction of arrow A in FIG.

FIG. 3 is a cross-sectional view showing a schematic configuration of an oil-water separator according to a conventional example.

Explanation of symbols

1 Oil-water separator

11 Container

11a 1st tank

l ib 2nd tank

11c 3rd tank

l id 4th tank

12 First divider

13 Second divider

14 Third divider

20 Wastewater supply mechanism

21 Supply pipe

22 Supply pump

25 Oil recovery mechanism

26 Collection pipe

27 Recovery valve

28 Collection container

30 discharge pipe B Oil

C moisture (purified water)

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, specific embodiments of the present invention will be described with reference to the accompanying drawings. 1 is a cross-sectional view showing a schematic configuration of an oil-water separator according to an embodiment of the present invention, and FIG. 2 is a side view in the direction of arrow A in FIG.

[0025] As shown in Figs. 1 and 2, the oil / water separator 1 of this example separates oil from wastewater (mixed water) containing oil, such as wastewater discharged from kitchen power at restaurants and the like. A container body 11 for separating oil B and water C in the waste water, a waste water supply mechanism 20 for supplying waste water into the container body 11, and an oil recovery mechanism for recovering oil B separated from the waste water 25 and a discharge pipe 30 that discharges water C with separated drainage as purified water to the outside.

[0026] The container body 11 has a structure in which the inside is partitioned into four tanks of a first tank 11a, a second tank l ib, a third tank 11c, and a fourth tank l id arranged in a line in the horizontal direction. Is provided. Specifically, the first tank 1 la and the second tank l ib are separated by the first partition plate 12, and the second tank l ib and the third tank 11c are separated by the second divider plate 13 and the first tank 1 la. And the fourth tank 1 Id are partitioned by the third partition plate 14.

[0027] The first partition plate 12 has an upper end provided at a distance from the ceiling surface and lower than the liquid level height position of the purified water (moisture), and the first tank 11a and the second tank l The upper part of the ib is partitioned so that the upper part communicates with each other, the lower end of the second partition plate 13 is provided with a bottom force interval, and the bottom part of the second tank 1 lb and the third tank 1 lc communicate with each other. The third partition plate 14 is provided such that the upper end of the third partition plate 14 is spaced higher than the ceiling surface and is higher than the liquid level of the purified water C. The first tank 11a and the fourth tank l id The upper part of each is partitioned to communicate with each other. The partition plates 12, 13, and 14 are placed in parallel with each other.

[0028] The ceiling surface of the container body 11 is provided with the highest ceiling surface of the fourth tank l id where the ceiling surface of the third tank 11c is the lowest, and the first tank 11a and the second tank l ib The ceiling surface is inclined so that the third tank 11c side is lowered, and a part of the ceiling surface is arranged in the purified water C. The fourth tank 1 Id is provided so that the upper side surface force of the first tank 1 la protrudes.

[0029] The drainage supply mechanism 20 has one end connected to the first tank 11a, and the other end is a restaurant. Which kitchen force consists of a supply pipe 21 connected to the recovery tank 5 into which the discharged waste water flows, and a supply pump 22 for supplying the waste water in the recovery tank 5 into the first tank 11a via this supply pipe 21. The supply pipe 21 is formed so that both ends are open, and one end side penetrates from the ceiling into the first tank 11a and extends toward the bottom side, and the one end is the bottom part of the first tank 11a. Is located. On the other hand, the other end of the supply pipe 21 has a wide opening and is disposed in the surface layer portion of the drainage in the collection tank 5. The recovery tank 5 is connected with an inflow pipe 5a for allowing the drainage to flow in and a drain pipe 5b for discharging the drainage.

[0030] The oil recovery mechanism 25 includes the fourth tank l id, a recovery pipe 26 connected to the lower surface of the fourth tank l id, a recovery valve 27 provided in the recovery pipe 26, and a fourth tank l a part of the oil B above the purified water C flows beyond the third partition plate 14 into the fourth tank l id. It comes to be.

[0031] The discharge pipe 30 has a ceiling force penetrating into the third tank 11c at one end side and connected to the recovery tank 5 at the other end side. 3 Drain purified water C in tank 11c to collection tank 5 side. The opening on the other end side of the discharge pipe 30 is formed wide.

[0032] According to the oil-water separator 1 of the present example configured as described above, the wastewater supplied from the recovery tank 5 to the container body 11 via the supply pipe 21 by the supply pump 22 is the first tank 11a. From the bottom of the tank to the top of the first tank 11a, the top of the second tank l ib, the bottom of the second tank l ib, the bottom of the third tank 11c and the top of the third tank 11c, and the recovery tank from the discharge pipe 30 However, oil B and water C are separated by the difference in specific gravity in the first tank 11a and the second tank l ib (oil B is separated on the upper side and water C is separated on the lower side). The separated water C is discharged from the third tank 1 lc as clean water by the pressure of the oil B and the water C in the container 11.

[0033] On the other hand, a part of the separated oil B passes through the third partition plate 14 and flows into the fourth tank l id side and is stored in the fourth tank l id. The oil B in the tank is collected in the collection container 28 through the collection pipe 26 when the collection valve 27 is opened. The oil B in the second tank 11b is inclined such that the ceiling surfaces of the first tank 1 la and the second tank 1 lb are lowered on the third tank 1 lc side, and a part thereof is purified water C Since it is placed inside, it is in a state of being close to the 1st tank 1 la side. [0034] In this way, the waste water in the recovery tank 5 is supplied into the container body 11 and separated into oil and water, and the purified water C from which the oil B has been separated is returned to the recovery tank 5 from the container body 11. In other words, drainage is circulated between the recovery tank 5 and the container body 11, so that the drainage force in the recovery tank 5 is also removed from the oil B, and the drainage from which the oil B has been removed is discharged into the drainpipe 5b. It is drained into rivers and seas through

Thus, according to the oil-water separator 1 of this example, the one end of the supply pipe 21 having one end opened is disposed at the bottom of the first tank 11a, and the opening force recovery tank 5 Since the wastewater is supplied into the first tank 11a, even if the supply amount of the wastewater is increased, it is separated from the separated oil B by the supply of the wastewater as in the conventional oil-water separator 100 above. Oil B and water C that are not mixed with water C (purified water) can be separated more reliably and efficiently, and purified water C without oil B can be returned to the recovery tank 5.

[0036] Further, the second partition member 13 communicates the bottom of the second tank 1 lb and the third tank 1 lc so that the first partition member 12 communicates with the top of the first tank 11a and the second tank l ib. In addition, one end of the supply pipe 21 is arranged at the bottom of the first tank 11a, and drainage (purified water C) is discharged from the bottom of the first tank 11a to the top of the first tank 11a and the second tank l. The top of ib, the bottom of the second tank l ib, the bottom of the third tank 11c and the top of the third tank 1 lc, so that the two tanks, the first tank 1 la and the second tank 11 b The oil B can be separated by this, and the process for oil-water separation (each flow distance in the first tank 11a and the second tank l ib) can be lengthened. Oil B and water C can be separated reliably and efficiently, and purified water C not mixed with oil B can be returned to the collection tank 5.

[0037] In addition, the ceiling surfaces of the first tank 11a and the second tank l ib are inclined so that the third tank 11c side is lowered, and a part thereof is provided in the purified water C. The oil B in the tank 1 lb is moved closer to the 1st tank 1 la side to reduce the amount of the oil B remaining in the 2nd tank l ib, and the separated oil B is also applied to the 1st tank 11a side force in the 2nd tank l It is possible to prevent the oil B from flowing to the ib side and to prevent the separated oil B from flowing into the third tank 11c together with the purified water C and being discharged to the recovery tank 5 side.

[0038] Although one embodiment of the present invention has been described above, specific embodiments that the present invention can take are not limited to this.

[0039] In the above example, the waste water discharged from the kitchen, such as in a restaurant, is supplied into the container 11 and the oil B However, the wastewater to be treated is not limited to this.

[0040] Further, the first partition plate 12 is configured so that the separated oil B and purified water C can flow between the upper part of the first tank 11a and the upper part of the second tank l ib. 13 may have any shape as long as the purified water C is partitioned to flow between the bottom of the second tank ib and the bottom of the third tank 11c. The height of the third partition plate 14 depends on the supply amount from the supply pipe 21 and the discharge amount from the discharge pipe 30, the internal volumes of the first tank 11a, the second tank lib, and the third tank 11c. The partition height can be adjusted as appropriate.

[0041] Furthermore, in the above example, the force provided obliquely on the ceiling surface of the second tank ib so that about half of the ceiling surface is disposed in the purified water C. However, the entire ceiling surface of the second tank l ib and a part of the ceiling surface of the first tank 11a may be placed in the purified water C. In this way, the oil B in the first tank 11a is brought closer to the fourth tank l id side, making it difficult for the first tank 11a side force to move to the second tank l ib side, or the second tank l The oil B in ib can be moved to the first tank 11a side, and the separated oil B can be prevented from being discharged to the recovery tank 5.

[0042] In addition, a heater for heating the separated oil B to a predetermined temperature may be appropriately provided in a portion where the separated oil B is accumulated in the fourth tank id or the first tank 11a. In this way, it is possible to prevent the oil B from solidifying and deteriorating the discharge from the recovery pipe 26 or adhering to the inner surface of the container body 11.

Industrial applicability

[0043] As described above, the oil / water separator according to the present invention can be suitably used when separating oil from wastewater (mixed water) containing oil.

Claims

The scope of the claims

[1] Mixed hydraulic power containing oil An oil-water separator that separates and discharges oil,

The container is divided into three tanks, a first tank, a second tank, and a third tank arranged side by side in the lateral direction, and a container body for separating the oil and water in the mixed water, and the container body A mixed water supply means for supplying the mixed water; an oil collection means for recovering oil separated from the mixed water; and a discharge pipe for discharging the water separated from the mixed water to the outside as purified water. And

The drain pipe is connected to an upper part of the third tank, and is configured to be able to discharge the purified water in the third tank by the pressure of oil and moisture in the container body. .

[2] At least the first tank and the second tank are juxtaposed in a row in the horizontal direction, and the ceiling surfaces of the first tank and the second tank are inclined so that the second tank side is lowered, 2. The oil / water separator according to claim 1, wherein a portion is disposed in the purified water.