TWI693961B - Negative pressure oil-water separator - Google Patents

Abstract

A negative-pressure oil-water separator includes a liquid storage barrel suitable for connecting to a waste water tank, an oil storage barrel connected to the liquid storage barrel, and a negative pressure device. The liquid storage barrel defines a liquid inlet space suitable for containing grease and fluid and a liquid outlet space suitable for containing fluid. The oil storage barrel is suitable for constructing an airtight liquid outlet space and the liquid inlet space with the waste water tank containing the grease and fluid and the liquid storage bucket. The negative pressure device communicates with the liquid outlet space and is used to generate negative pressure, suitable for outputting the fluid in the liquid outlet space to the outside, and suitable for sucking the fluid and grease in the waste water tank into the liquid inlet space. In this way, with the aforementioned enclosed space and the negative pressure device, the fluid can flow from the waste water pool to the outside through the liquid storage barrel, and since the grease enters the liquid storage barrel, it is isolated from the fluid in the liquid discharge space, so , Can ensure that the fluid passing through the negative pressure device is clean water, and can significantly reduce the cleaning frequency and cost.

Description

Negative pressure oil-water separator

The invention relates to an oil-water separator, in particular to a negative-pressure oil-water separator.

Referring to FIG. 1, a conventional oil-water separator 1 mainly includes a liquid storage tank 11 connected to a waste water tank 2, and a tank 21 for sucking grease 21 and fluid 22 in the waste water tank 2 into the liquid storage tank 11. Pump 12. The liquid storage barrel 11 defines a liquid inlet space 111 suitable for containing grease 21 and fluid 22, and a liquid outlet space 112 suitable for containing fluid 22, and has a water outlet 113 communicating with the liquid outlet space 112, And an oil outlet 114 communicating with the liquid inlet space 111.

When the grease 21 and the fluid 22 are separated, the pump 12 will suck the grease 21 and the fluid 22 in the wastewater tank 2 into the liquid inlet space 111, and then use the characteristic that the specific gravity of the grease 21 is smaller than the specific gravity of the fluid 22 to make the liquid into the liquid inlet The grease 21 in the space floats on the fluid 22 and is blocked in the liquid inlet space 111, whereby when the accumulated height of the grease 21 and the fluid 22 is higher than the oil outlet 114 and the water outlet 113, respectively, Grease 21 is discharged from the oil outlet 114, and fluid 22 is discharged from the water outlet 113.

However, the space configuration of the conventional oil-water separator 1 has the following disadvantages:

1. The pump 12, which is generally used for sucking the fluid 22, if air is sucked, it is easy to lose the water absorption effect due to the "wind pack", which requires manual troubleshooting.

2. Although there are also pumps on the market that are not afraid of package winds, so-called self-priming pumps, the self-priming pumps have a sophisticated structure and high cost, and if dirt enters, they will fail and fail. Therefore, if you use self-priming pumps, When the suction pump is installed, it is necessary to install a filter screen for preventing dirt from entering the self-priming pump, and the installation of the filter screen will cause clogging problems and high cleaning costs.

Therefore, an object of the present invention is to provide a negative-pressure oil-water separator that can greatly reduce the cleaning frequency and cost.

Therefore, the negative-pressure oil-water separator of the present invention is suitable for separating grease and fluid. The oil-water separator includes a liquid storage barrel, an oil storage barrel, and a negative pressure device.

The liquid storage barrel defines a liquid inlet space suitable for containing grease and fluid, a liquid outlet space suitable for containing fluid, and a channel and a vent connecting the liquid inlet space and the liquid outlet space In order to input grease and fluid and communicate with an inlet of the liquid inlet space and the waste water tank, and an oil outlet that communicates with the liquid inlet space, the vent is used to make the liquid inlet space and the liquid outlet space Air pressure maintains balance.

The oil storage barrel is connected to the oil outlet of the liquid storage barrel, and is suitable for constructing an airtight liquid discharge space and the inlet with the waste water tank containing the grease and fluid and the liquid storage barrel 液空间。 Liquid space.

The negative pressure device communicates with the liquid discharge space and is used to generate negative pressure, suitable for outputting the fluid in the liquid discharge space to the outside, and suitable for sucking the fluid and grease in the waste water tank into the liquid inlet space.

The effect of the present invention is that the aforementioned closed space and the negative pressure device enable the fluid to flow from the waste water pool to the outside through the liquid storage barrel, and because the grease will enter the liquid storage tank after entering the liquid storage tank Isolation, therefore, can ensure that the fluid passing through the negative pressure device is clean water, and can significantly reduce the cleaning frequency and cost.

3: waste water tank

31: Grease

32: fluid

4: Liquid storage barrel

401: Liquid entry space

402: Liquid discharge space

403: vent

72: straw

73: Liquid inlet tube

74: Outlet pipe

8: Telescopic tube

80: inner hole

9: floating body unit

91: floating body

41: bottom wall

411: Outlet

42: Around the wall

421: Entrance

422: Outlet

43: Channel

44: Separator

5: Sealing device

51: Sealing cover

52: sealing washer

6: Oil storage barrel

7: Negative pressure device

71: Pump

92: spacer

920: Oil drain

921: Ring Wall

922: connector

923: Open end

Z: height direction

L: axis

H: pitch

h: height

h1: height

h2: height

A: Cross-sectional area

Other features and functions of the present invention will be clearly presented in the embodiment with reference to the drawings, in which: FIG. 1 is a schematic sectional view illustrating a conventional oil-water separator; FIG. 2 is a schematic sectional view , Illustrating a first embodiment of the negative pressure oil-water separator of the present invention; FIG. 3 is a schematic sectional view illustrating a second embodiment of the negative pressure oil-water separator of the present invention; FIG. 4 is the second embodiment A schematic cross-sectional view containing a fluid; FIG. 5 is a schematic cross-sectional view of separating grease and fluid of the second embodiment; FIG. 6 is a schematic cross-sectional view similar to FIG. 5 but with a liquid storage tank tilted.

Referring to FIG. 2, a first embodiment of the negative-pressure oil-water separator of the present invention is suitable for guiding grease 31 and fluid 32 in a waste water tank 3 into. The negative-pressure oil-water separator includes a liquid storage barrel 4, a sealing device 5, an oil storage barrel 6, and a negative pressure device 7.

The liquid storage tank 4 includes a bottom wall 41, a surrounding wall 42 connected around the bottom wall 41 and extending along a height direction Z, and a surrounding wall 42 connected to the surrounding wall 42 and defining a passage 43 with the bottom wall 41 One separate piece 44.

The surrounding wall 42 has an inlet 421 and an oil outlet 422 separated by a distance. The inlet 421 is suitable for inputting grease 31 and fluid 32. The oil outlet 422 is suitable for outputting grease 31, and is separated from the inlet 421 by a distance H along the height direction Z.

The separator 44 and the surrounding wall 42 and the bottom wall 41 define a liquid inlet space 401 and a liquid outlet space 402 communicating through the channel 43, and are opposite to the bottom wall 41 of the liquid storage barrel 4 A vent 403 is defined between the positions. The liquid inlet space 401 communicates with the inlet 421 and the oil outlet 422 and is suitable for containing the grease 31 and the fluid 32. The liquid outlet space 402 communicates with the liquid inlet space 401 and is suitable for containing the fluid 32. The vent 403 is used to maintain the air pressure in the liquid inlet space 401 and the liquid outlet space 402 in balance.

The sealing device 5 includes a sealing cover 51 (see FIG. 4), and an airtight gasket 52 (see FIG. 4). In this embodiment, the sealing cover 51 is connected to an end of the surrounding wall 42 opposite to the bottom wall 41, and is used to close the liquid storage barrel 4 and is defined with the separating member 44 The vent 403. The airtight gasket 52 (see FIG. 4) is provided between the sealing cover 51 and the surrounding wall 42 for blocking air from entering and enhancing the airtight effect.

The oil storage barrel 6 communicates with the oil outlet 422 of the liquid storage barrel 4 and is suitable for constructing an airtight liquid discharge with the waste water tank 3 containing grease and fluid, the liquid storage barrel 4 and the sealing cover 51 The space 402 and the liquid inlet space 401.

The negative pressure device 7 includes a pump 71 installed on the sealing cover 51 and used for generating negative pressure, a suction pipe 72 communicating with the pump 71 and the liquid discharge space 402, and connecting the inlet 421 and the waste water tank A liquid inlet pipe 73 of 3, and an oil outlet pipe 74 connecting the oil storage barrel 6 and the oil outlet 422.

It should be noted that the pump 71 is not limited to being installed on the sealing cover 51, and in other variations of this embodiment, it may also be installed on the liquid storage tank 4, or other locations.

Since the liquid inlet space 401 and the liquid outlet space 402 are airtight spaces, when the pump 71 generates negative pressure, it will pass through the suction pipe 72, the airtight liquid inlet space 401 and the liquid outlet space 402, The liquid inlet pipe 73 starts to suck the grease 31 and the fluid 32 in the waste water tank 3.

When the fluid 32 and the grease 31 enter the liquid inlet space 401 through the inlet 421, the fluid 32 will exist in the liquid inlet space 401 and the liquid outlet space 402 through the channel 43 at the same time, and the grease 31 will be separated by the separating member 44, It is restricted to the liquid inlet space 401.

When the grease 32 with lighter specific gravity accumulates in the height direction Z until it overflows the oil outlet 422, the grease 31 will be discharged from the oil outlet 422 through the oil outlet pipe 74 to the reservoir In the oil drum 6, the effect of separating oil and water is achieved. At the same time, the fluid 32 remaining in the liquid inlet space 401 and separated from the grease 31 is sucked by the suction pipe 72, passes through the pump 71, and is discharged to the outside.

3, 4 and 5 is a second embodiment of the present invention, which is substantially the same as the first embodiment, and also includes the liquid storage barrel 4, the sealing cover 51, the oil storage barrel 6, and The negative pressure device 7 further includes a telescopic tube 8 and a floating body unit 9.

The bottom wall 41 has an oil outlet 411.

In the present embodiment, the telescopic tube 8 is a bellows tube, connected to the bottom wall 41 of the liquid storage barrel 4 and located in the liquid inlet space 401, and can be extended and contracted along the height direction Z, and is defined to communicate with the outlet One inner hole 80 of the oil port 411.

It should be noted that the telescopic tube 8 is not limited to a bellows tube. In other variations of this embodiment, it may also be a two-stage or multi-stage pipe fitting.

The floating body unit 9 is connected to the telescopic tube 8 and includes a floating body 91 adapted to float between the grease 31 and the fluid 32, and a partition 92 extending from the floating body 91 along the height direction Z.

In the present embodiment, the floating body 91 surrounds an axis L extending along the height direction Z, and forms a ring body. The specific gravity of the floating body 91 is larger than the specific gravity of the grease 31 and smaller than the specific gravity of the fluid 32. It is worth noting that the specific gravity of the floating body unit 9 and the telescopic tube 8 is between 0.75 and 0.99, which is (the weight of the floating body 91 + the weight of the separator 92 + the weight of the telescopic tube 8)/the drainage volume of the floating body 91.

It should be noted that the number of the floating body 91 is not limited to one, and in other variations of this embodiment, two, three, or more than three may be provided around the axis L. And the cross-sectional area of the floating body 91 along the direction perpendicular to the axis L is larger than the cross-sectional area of the telescopic tube 8 along the direction perpendicular to the axis L.

The isolating member 92 surrounds the axis L, and has a connecting end 922 connected to the floating body 91 or the telescopic tube 8 and an open end 923 opposite to the connecting end 922. The open end 923 defines a row of oil ports 920 communicating with the inner hole 80 and adapted to allow the grease 31 to enter the inner hole 80. The oil discharge port 920 floats in the height direction Z relative to the oil outlet 411. In this embodiment, the cross-sectional area of the floating body 91 along the direction perpendicular to the axis L is larger than the cross-sectional area of the spacer 92 along the direction perpendicular to the axis L. Preferably, the cross-sectional area of the floating body 91 is the spacer 92 The cross-sectional area is more than five times larger.

Since the specific gravity of the grease 31 is lighter than the fluid 32 and will float on the fluid 32, when the fluid 32 and the grease 31 enter the liquid inlet space 401 through the inlet 421, the fluid 32 will exist in the liquid inlet through the channel 43 at the same time The space 401 is separated from the liquid outlet space 402, and the grease 31 is separated by the separating member 44 and restricted to the liquid inlet space 401.

At this time, because the specific gravity of the floating body 91 is greater than that of the grease 31 and smaller than that of the fluid 32, it sinks in the grease 31, but is floated between the grease 31 and the fluid 32 due to the buoyancy of the fluid 32 , And floats as the height of the fluid 32 in the storage tank 4 changes, and drives the telescopic tube 8 to expand and contract along the height direction Z, whereby when the lighter specific grease 32 accumulates along the height direction Z to flood The open end 923 of the spacer 92 At this time, the grease 31 will enter the inner hole 420 of the telescopic tube 4 through the oil discharge port 920, and then be discharged through the oil discharge port 411 to achieve the effect of oil-water separation.

At the same time, when the fluid 32 remaining in the liquid inlet space 401 accumulates in the height direction Z until it overflows the water outlet 422, it will be discharged from the water outlet 422.

It is worth noting that, as shown in FIG. 3, when there is no grease 31 initially, the principle that the floating body 91 can be maintained in a balanced state is as follows: W=F…………………………………………Formula (1)

F=V`×ρ1=A×h1×ρ1…………Formula (2)

Where, W: the weight of the telescopic tube 4; F = the buoyancy of the floating body 91; V`: the volume of the floating body 91 under the liquid surface; ρ1: the density of water; A: the cross-sectional area of the floating body 91; h1: the height of the floating body 91 below the liquid surface; as shown in FIG. 4, when the liquid inlet space 401 contains the grease 31, the principle that the floating body unit 9 can be in the oil discharge state is as follows: F=A× h1×ρ1+A×h2×ρ2………………Formula (3)

F=A×h×ρ1-A×h2×(ρ1-ρ2)…………Formula (4)

Among them, ρ2: the density of the grease 31; h: the height of the floating body 91 below the oil surface of the grease 31 and the liquid surface of the fluid 32 Degree; h2: the height of the floating body 91 under the oil surface of the grease 31; as can be seen from the formula (4), A×h×ρ1 is approximately equivalent to the weight of the telescopic tube 8 when there is no grease 31 initially, A×h2×( ρ1-ρ2) is the change in buoyancy. From this, it can be deduced that when the liquid inlet space 401 contains the grease 31, the buoyancy F of the floating body 91 is smaller than the buoyancy F of the floating body 91 when there is no grease 31 initially, so , The floating body 91 will sink under the oil surface, so that the grease 32 accumulates along the height direction Z until it overflows the open end 923 of the separator 92, and enters the inner hole of the telescopic tube 4 from the oil discharge port 920 In 420, it is discharged from the oil outlet 411 again to achieve the effect of oil-water separation.

Since those with ordinary knowledge in the art can infer extended details based on the above description, no more explanation will be given.

Through the above description, the advantages of the foregoing embodiments can be summarized as follows:

1. Since the grease 31 is isolated from the fluid 32 in the liquid discharge space 402 after entering the storage tank 4, at this time, the grease has been deposited on the bottom wall 41 of the storage tank 4, and the grease is trapped in the The liquid inlet space 401 can therefore ensure that the fluid 32 passing through the negative pressure device 7 is clean water, which not only does not have the problem of "enveloping air", but also does not require a filter screen, which can greatly reduce the cleaning frequency and cost. What is important is that the failure rate of the negative pressure device 7 can be greatly reduced, and a more precise and efficient pump 71 is selected to improve the suction performance.

2. When used in the field of sewage treatment, sewage often contains malodorous It is possible to effectively block the emission of odor by the sealed liquid storage barrel 4 and the sealing cover 51.

3. The floating body 91 is provided with an oil discharge port 920 whose height can be adjusted, and in the case where the overall height can be reduced, the separator 92 can also be used to produce a sufficient drop between the grease 31 and the fluid 32 to improve the oil-water separation effect .

4. As shown in FIG. 6, when the liquid storage tank 4 is installed, there is no leveling requirement. When the liquid storage tank 4 is tilted, the floating body 91 will also adjust the position with the liquid level to maintain the oil discharge The relative position of the port 920 and the water outlet 422 still has the oil-water separation effect. In this way, the convenience during installation is improved.

However, the above are only examples of the present invention, and the scope of implementation of the present invention cannot be limited by this, any simple equivalent changes and modifications made according to the scope of the patent application of the present invention and the content of the patent specification are still classified as Within the scope of the invention patent.

3: waste water tank

31: Grease

32: fluid

4: Liquid storage barrel

401: Liquid entry space

402: Liquid discharge space

44: Separator

5: Sealing device

51: Sealing cover

6: Oil storage barrel

7: Negative pressure device

71: Pump

403: vent

41: bottom wall

42: Around the wall

421: Entrance

422: Outlet

43: Channel

72: straw

73: Liquid inlet tube

74: Outlet pipe

Z: height direction

H: pitch

Claims (10)

A negative pressure oil-water separator is suitable for guiding the entry of grease and fluid in a waste water tank. The oil-water separator includes: A liquid storage barrel is defined with a liquid inlet space suitable for containing grease and fluid, a liquid outlet space suitable for containing fluid, and a channel and a vent connecting the liquid inlet space and the liquid outlet space, and having The utility model is suitable for inputting grease and fluid and is connected to an inlet of the liquid inlet space and the waste water tank, and an oil outlet connected to the liquid inlet space, and the air vent is used to make the liquid inlet space and the liquid outlet space Maintains a balanced air pressure; An oil storage barrel, which is connected to the oil outlet of the liquid storage barrel, and is suitable for constructing an airtight liquid outlet space and the liquid inlet space with the waste water tank containing the grease and fluid, and the liquid storage drum; and A negative pressure device communicates with the liquid discharge space and is used to generate negative pressure, suitable for outputting fluid in the liquid discharge space to the outside, and suitable for sucking fluid and grease in the waste water tank into the liquid discharge space. The negative pressure oil-water separator according to claim 1, wherein the liquid storage barrel includes a bottom wall, a surrounding wall extending along the height direction around the bottom wall, and a separating member connected to the surrounding wall , The separating member and the bottom wall define the channel, and the surrounding wall and the bottom wall define the liquid inlet space and the liquid outlet space communicating through the channel, and are opposite to the liquid storage barrel to the The vent is defined between the positions of the bottom wall. The negative pressure oil-water separator according to claim 2, wherein one of the bottom wall of the liquid storage tank and the surrounding wall has the oil outlet, and the surrounding wall has the inlet. The negative pressure oil-water separator according to claim 2, further comprising a sealing device including a sealing cover connected to the surrounding wall, the sealing cover closing the liquid storage tank. The negative pressure oil-water separator according to claim 4, wherein the negative pressure device includes a pump installed outside the liquid storage barrel, and a suction pipe connected to the pump and the liquid discharge space. The negative pressure oil-water separator according to claim 4, wherein the sealing device further includes an airtight gasket disposed between the sealing cover and the surrounding wall. The negative pressure oil-water separator according to claim 1, further comprising a telescopic tube and a floating body unit, the telescopic tube is telescopically connected to the liquid storage barrel and located in the liquid inlet space, and defines a communication An inner hole of the oil outlet, the floating body unit is connected to the telescopic tube, and includes at least one floating body, and an isolator extending from the at least one floating body in a height direction, the specific gravity of the at least one floating body It is greater than the specific gravity of grease and less than the specific gravity of fluid, and is suitable for floating between grease and fluid. The separator has a row of oil ports connected to the inner hole and suitable for allowing grease to enter the inner hole. The negative pressure oil-water separator according to claim 7, wherein the at least one floating body surrounds an axis extending in the height direction. The negative pressure oil-water separator according to claim 8, wherein the isolating member has a ring wall surrounding the axis, and the ring wall has a connecting end connecting one of the at least one floating body and the telescopic tube , And an open end opposite to the connecting end. The negative-pressure oil-water separator according to claim 9, wherein the open end defines the oil discharge port.

Images