CN112386958A - Oil-water separator - Google Patents
Oil-water separator Download PDFInfo
- Publication number
- CN112386958A CN112386958A CN201910749612.3A CN201910749612A CN112386958A CN 112386958 A CN112386958 A CN 112386958A CN 201910749612 A CN201910749612 A CN 201910749612A CN 112386958 A CN112386958 A CN 112386958A
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- oil
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 59
- 238000005192 partition Methods 0.000 claims abstract description 115
- 239000007788 liquid Substances 0.000 claims abstract description 35
- 238000000926 separation method Methods 0.000 claims abstract description 17
- 238000007599 discharging Methods 0.000 claims abstract description 3
- 235000019198 oils Nutrition 0.000 description 55
- 239000010865 sewage Substances 0.000 description 5
- 235000019476 oil-water mixture Nutrition 0.000 description 4
- 239000002351 wastewater Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 239000010806 kitchen waste Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000004060 metabolic process Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
- B01D17/02—Separation of non-miscible liquids
- B01D17/0208—Separation of non-miscible liquids by sedimentation
- B01D17/0211—Separation of non-miscible liquids by sedimentation with baffles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Removal Of Floating Material (AREA)
Abstract
The invention discloses an oil-water separator, which comprises a box body, wherein the box body comprises a bottom plate and a side plate, a first partition plate is arranged in the box body, a liquid discharging hole is formed in the first partition plate, a second partition plate which is positioned below the first partition plate is also arranged in the box body, and the second partition plate is an inclined plate; the first partition plate and the second partition plate divide the space in the box body into an upper space, a middle space and a lower space, the middle space and the lower space are communicated through a gap at the lower end of the second partition plate, the side plate is provided with an oil outlet communicated with the lower space, and the oil outlet is close to the higher end of the second partition plate; the box body is also provided with a water outlet communicated with the middle space; and a liquid outlet end of the liquid outlet channel is communicated with the lower space. The oil-water separator can realize unpowered oil-water separation.
Description
Technical Field
The invention relates to the field of kitchenware, in particular to an oil-water separator.
Background
In a kitchen, oil which flows to a sewer together with sewage blocks the sewer and brings troubles, if the oily wastewater is directly discharged into a city drainage pipeline without being treated, so-called kitchen waste grease can be formed, which affects drainage equipment and a city sewage treatment plant, the oil concentration of mixed sewage flowing into a biological treatment structure cannot be larger than 30-50 mg/L generally, otherwise, the normal metabolic process of active sludge and a biological membrane can be directly affected. In addition, because a lot of oil is contained in restaurants and hotels, the direct discharge can also cause waste, so that the water in the water pool needs to be subjected to oil-water separation, and in the oil-water separator in the current market, a valve of an oil outlet can be opened for oil discharge only when the oil level is full to a certain height until the waste water is discharged, and the discharged oil contains waste water, so that the oil-water separation effect cannot be efficiently achieved.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to overcome the defects of the prior art and provides an oil-water separator.
The technical scheme is as follows: an oil-water separator comprises a box body, wherein the box body comprises a bottom plate and a side plate, a first partition plate is arranged in the box body, a liquid discharging hole is formed in the first partition plate, a second partition plate is arranged below the first partition plate in the box body, and the second partition plate is an inclined plate; the first partition plate and the second partition plate divide the space in the box body into an upper space, a middle space and a lower space, the middle space and the lower space are communicated through a gap at the lower end of the second partition plate, the side plate is provided with an oil outlet communicated with the lower space, and the oil outlet is close to the higher end of the second partition plate; the box body is also provided with a water outlet communicated with the middle space; and a liquid outlet end of the liquid outlet channel is communicated with the lower space.
Specifically, the upper space is located above the first partition, the intermediate space is located between the first partition and the second partition, and the lower space is located between the second partition and the bottom plate.
Furthermore, a plurality of first auxiliary plates are fixed on the bottom plate, a plurality of second auxiliary plates fixedly connected with the second partition plates are arranged below the second partition plates, and second through holes are formed in the top ends of the second auxiliary plates.
Further, the number of the first auxiliary plates is 1 or more and 10 or less, preferably 3 to 5; the number of the second auxiliary plates is more than or equal to 1 and less than or equal to 10, preferably 2-4; the first auxiliary plate and the second auxiliary plate are both flat plates.
Preferably, the first and second auxiliary plates are alternately arranged.
Further, the included angle between the first auxiliary plate and the bottom plate is 80-100 degrees, and preferably 90 degrees; the included angle between the second auxiliary plate and the second partition plate is 70-110 degrees, and preferably 85-95 degrees; the included angle between the second clapboard and the bottom plate is between 5 and 80 degrees, and preferably between 10 and 40 degrees.
Furthermore, an oil collecting tank fixed with the second partition plate is arranged in the middle space, the oil outlet is communicated with the space in the oil collecting tank, and a through hole is formed in the second partition plate and communicated with the space in the oil collecting tank.
Preferably, the through hole communicates with a bottom end of the oil sump tank.
Furthermore, the top end of the box body is provided with an opening, and the side plates of the box body comprise a first side plate, a second side plate, a third side plate and a fourth side plate; the higher end of the second partition plate is fixedly connected with the second side plate; the box body is also internally provided with a partition vertical plate fixedly connected with the bottom plate, the partition vertical plate is positioned between the first side plate and the second side plate, the partition vertical plate is also positioned between the first side plate and the second partition plate, and a gap for communicating an intermediate space and a lower space is formed between the lower ends of the partition vertical plate and the second partition plate; the partition vertical plate divides the space in the box body into a first space close to the first side plate and a second space close to the second side plate, the middle space and the lower space are both positioned in the second space, and the water outlet hole is communicated with the first space; the top end of the separation vertical plate is lower than the lowest end of the oil outlet by 0.1-2 cm. Preferably 0.5-1 cm.
Furthermore, the separation vertical plate is also connected with a first vertical plate through a connecting plate, the first separation plate is also connected with a second vertical plate, the second vertical plate is positioned between the separation vertical plate and the first vertical plate, and the top end of the first vertical plate and the top end of the separation vertical plate are both higher than the bottom end of the second vertical plate; the top end of the first vertical plate is lower than the top end of the separation vertical plate; the first vertical plate, the second vertical plate and the connecting plate are all located in the middle space.
Furthermore, a leakage net is arranged at the lower liquid hole; the bottom end of the first auxiliary plate is provided with a first through hole; the box still has the feed opening, the feed opening with below space intercommunication, feed opening department has stopper portion. Preferably, the feed opening is located at the bottom plate.
Furthermore, the box body is cuboid, the first partition plate is a rectangular plate, the liquid discharge hole is positioned at one corner of the first partition plate, and one corner of the first partition plate, which is provided with the liquid discharge hole, is lower than the other three corners; the second partition board is a rectangular board, the through hole is positioned at one corner of the second partition board, and one corner of the through hole of the second partition board is higher than the other three corners; the second auxiliary plate is a rectangular plate, the second through holes on the second auxiliary plate are positioned at one corner of the top end of the second auxiliary plate, and for each second auxiliary plate, one corner with the second through holes is higher than the other three corners. Such an arrangement facilitates the flow of the oil-water mixture down the lower fluid bore and the passage of oil through the plurality of second through-bores and the ingress of oil into the oil collection tank.
Further, the first through hole is a through hole formed in the first auxiliary plate, or the first through hole is surrounded by a notch of the first auxiliary plate, the side plate and the bottom plate; the second through hole is formed in the second auxiliary plate, or is formed by surrounding one unfilled corner of the second auxiliary plate, the side plate and the second partition plate; the lower liquid channel is formed by surrounding a side plate and a channel plate of the box body, and the lower liquid channel penetrates through the middle space.
Preferably, the channel plate is L-shaped in cross-section.
Furthermore, the partition vertical plate, the first vertical plate and the second vertical plate are all rectangular plates.
Preferably, the number of water outlets may be two.
Preferably, the box body is a rectangular parallelepiped box body.
Preferably, the first auxiliary plate has 3 and the second auxiliary plate has 2.
Preferably, the bottom end of the oil collecting tank is connected with the second partition plate in a sealing mode. So that water in the intermediate space cannot enter the oil collecting tank.
The working principle is as follows: the unpowered high-efficiency oil-water separator provided by the invention utilizes the physical principle that the specific gravity of oil and water is different, and integrates the oil and water separation by using the methods of filtration, precipitation, buoyancy lift, anisotropic flow distribution principle and the like according to the shallow pool precipitation theory. The flow speed of the sewage flowing through the separator is reduced, and the water flow floats upwards towards the oil drops. The floating oil droplets are completely driven to the oil collecting tank to be discharged through the downward pressure of the water in the separator.
Has the advantages that: the oil-water separator can effectively realize the separation of oil and water, the oil valve of the oil outlet can be normally opened, and wastewater cannot flow out of the oil outlet. The oil is driven to the oil collecting tank by using the water pressure, so that the oil and water can be separated more thoroughly. The oil-water separator of the invention has the advantages of no electricity, no power and low cost: the purpose of oil-water separation is easily realized only by using the liquid level difference formed when sewage flows through the device. The product has many unique points in the technical principle and the structural design, so the product has reliable work, small volume, extremely long service life, no need of adding any reagent and medicine and no secondary pollution.
Drawings
FIG. 1 is a schematic view of a first angle of the oil-water separator;
FIG. 2 is a second angle view of the oil-water separator;
FIG. 3 is a first angular cross-sectional view of the oil water separator;
FIG. 4 is a second angular cross-sectional view of the oil water separator;
FIG. 5 is a schematic diagram of oil-water direction, with thicker arrows indicating oil direction and thinner arrows indicating water direction.
Detailed Description
Reference numerals: 1, a box body; 1.1 a first side panel; 1.2 a second side plate; 1.5 a bottom plate; 2.1 oil outlet holes; 2.2, water outlet holes; 2.3, a feed opening; 3.1 a first separator; 3.1.1 drainage wells; 3.2 a second separator; 3.3 a blanking channel; 3.4 oil collecting tank; 3.5 first auxiliary plate; 3.5.1 first via; 3.6 second auxiliary plate; 3.6.1 second via; 4.1 a first riser; 4.2 a second riser; 4.3 separating the vertical plates; 4.4 connecting plates.
An oil-water separator comprises a box body 1, wherein the box body comprises a bottom plate 1.5 and side plates, a first partition plate 3.1 is arranged in the box body, a liquid outlet hole 3.1.1 is formed in the position of the first partition plate 3.1, a second partition plate 3.2 positioned below the first partition plate 3.1 is further arranged in the box body 1, and the second partition plate 3.2 is an inclined plate; the first partition plate 3.1 and the second partition plate 3.2 divide the inner space of the box body into an upper space, a middle space and a lower space, the middle space and the lower space are communicated through a gap at the lower end of the second partition plate 3.2, the side plate is provided with an oil outlet 2.1 communicated with the lower space, and the oil outlet 2.1 is close to the higher end of the second partition plate 3.2; the box body 1 is also provided with a water outlet hole 2.2 communicated with the middle space; a lower liquid channel 3.3 is connected to the lower liquid hole 3.1.1, and the liquid outlet end of the lower liquid channel 3.3 is communicated with the lower space. A plurality of first auxiliary plates 3.5 are fixed on the bottom plate 1.5, a plurality of second auxiliary plates 3.6 fixedly connected with the second partition plates 3.2 are arranged below the second partition plates 3.2, and second through holes 3.6.1 are arranged at the top ends of the second auxiliary plates 3.2. The number of the first auxiliary plates 3.5 is more than or equal to 1 and less than or equal to 10, preferably 3-5; the number of the second auxiliary plates 3.6 is more than or equal to 1 and less than or equal to 10, preferably 2-4; the first auxiliary plate and the second auxiliary plate are both flat plates. The included angle between the first auxiliary plate 3.5 and the bottom plate 1.5 is between 80 and 100 degrees. Preferably 90 degrees; the included angle between the second auxiliary plate 3.6 and the second partition plate 3.2 is 70-110 degrees, preferably 85-95 degrees; the included angle between the second partition plate 3.2 and the bottom plate 1.5 is between 5 and 80 degrees; preferably between 10 and 40 degrees. An oil collecting tank 3.4 fixed with the second partition plate 3.2 is arranged in the middle space, the oil outlet 2.1 is communicated with the space in the oil collecting tank 3.4, a through hole is formed in the second partition plate 3.2 and is communicated with the space in the oil collecting tank 3.4. The top end of the box body 1 is provided with an opening, and the side plates of the box body 1 comprise a first side plate 1.1, a second side plate 1.2, a third side plate and a fourth side plate; the higher end of the second partition plate 3.2 is fixedly connected with the second side plate 1.2; a partition vertical plate 4.3 fixedly connected with the bottom plate 1.5 is further arranged in the box body 1, the partition vertical plate 4.3 is positioned between the first side plate 1.1 and the second side plate 1.2, the partition vertical plate 4.3 is also positioned between the first side plate 1.1 and the second partition plate 3.2, and the lower end of the partition vertical plate 4.3 and the second partition plate 3.2 is provided with the gap for communicating the middle space and the lower space; the partition vertical plate 4.3 divides the space in the box body into a first space close to the first side plate and a second space close to the second side plate, the middle space and the lower space are both positioned in the second space, and the water outlet hole 2.2 is communicated with the first space; the top end of the separation vertical plate 4.3 is lower than the lowest end of the oil outlet 2.1 by 0.1-2 cm. Preferably 0.5-1 cm. The partition vertical plate is further connected with a first vertical plate through a connecting plate, the first partition plate 3.1 is further connected with a second vertical plate 4.2, the second vertical plate 4.2 is located between the partition vertical plate 4.3 and the first vertical plate 4.1, and the top end of the first vertical plate 4.1 and the top end of the partition vertical plate 4.3 are both higher than the bottom end of the second vertical plate 4.2; the top end of the first vertical plate 4.1 is lower than the top end of the separation vertical plate 4.3; the first vertical plate 4.1, the second vertical plate 4.2 and the connecting plate 4.4 are all located in the middle space. A leakage net is arranged at the position 3.1.1 of the lower liquid hole; the bottom end of the first auxiliary plate 3.5 is provided with a first through hole 3.5.1; the box 1 still has feed opening 2.3, feed opening 2.3 with below space intercommunication, feed opening 2.3 department has the stopper portion. The box body 1 is cuboid, the first partition plate 3.1 is a rectangular plate, the lower liquid hole 3.1.1 is positioned at one corner of the first partition plate 3.1, and one corner of the first partition plate 3.1 with the lower liquid hole 3.1.1 is lower than the other three corners; the second partition plate 3.2 is a rectangular plate, the through hole is positioned at one corner of the second partition plate 3.2, and one corner of the through hole of the second partition plate 3.2 is higher than the other three corners; the second auxiliary plate 3.6 is a rectangular plate, the second through hole of the second auxiliary plate 3.6 is located at one corner of the top end of the second auxiliary plate 3.6, and for each second auxiliary plate 3.6, one corner with the second through hole is higher than the other three corners. The first through hole is formed on the first auxiliary plate, or the first through hole is formed by surrounding a notch of the first auxiliary plate, the side plate and the bottom plate; the second through hole is formed in the second auxiliary plate, or is formed by surrounding one unfilled corner of the second auxiliary plate, the side plate and the second partition plate; the lower liquid channel is formed by surrounding a side plate of the box body and a channel plate with an L-shaped cross section, and the lower liquid channel penetrates through the middle space. The partition riser 4.3, the first riser 4.1 and the second riser 4.2 are all rectangular plates. The number of the water outlets can be two. The box body 1 is a cuboid box body. The first auxiliary plate 3.5 has 3 and the second auxiliary plate 3.6 has 2.
In the specific embodiment of the invention, a plurality of plates are fixed with the side plates of the box body in a folding mode, and the folding edge mainly plays a role in fixing. The invention mainly relies on the principle that oil is lighter than water to separate oil from water, and combines the principle with the graph shown in figure 5 (the thicker arrow is the schematic drawing of the oil trend, and the thinner arrow is the schematic drawing of the water trend), an oil-water mixture (possibly containing solid residues) enters the space above the first partition plate, and the filter screen is mainly used for preventing solids from entering a liquid discharge channel to block a liquid path. The oil-water mixture passes through the lower liquid channel from the lower liquid hole and then directly enters the lower space (note that the lower liquid channel passes through the middle space but is not communicated with the middle space), after the oil-water mixture enters the lower space, water moves leftwards along the bottom end due to the fact that the water is heavy (most of the water moves along thin arrows in the moving process, and part of the water passes through first through holes of the first auxiliary plate), oil moves rightwards and upwards along the second partition plate due to the fact that the oil is light (the oil passes through second through holes of the second auxiliary plate in the moving process), then the oil enters the oil collecting tank through the through holes of the second partition plate, and then the oil is discharged through the oil outlet hole. Water moves left and gets into the intermediate space via the space, gets into the space on partition riser left side through the space between first riser, the second riser again, flows out by the apopore again. Thereby realizing the separation of oil and water. In addition, when the liquid in the box body is required to be completely clear after the box body is used for a period of time, the plug part of the feed opening can be opened, so that the liquid in the box body is discharged completely.
While the invention has been shown and described with respect to the preferred embodiments, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the scope of the invention as defined in the following claims.
Claims (10)
1. An oil-water separator is characterized by comprising a box body, wherein the box body comprises a bottom plate and a side plate, a first partition plate is arranged in the box body, a liquid discharging hole is formed in the first partition plate, a second partition plate is arranged below the first partition plate in the box body, and the second partition plate is an inclined plate; the first partition plate and the second partition plate divide the space in the box body into an upper space, a middle space and a lower space, the middle space and the lower space are communicated through a gap at the lower end of the second partition plate, the side plate is provided with an oil outlet communicated with the lower space, and the oil outlet is close to the higher end of the second partition plate; the box body is also provided with a water outlet communicated with the middle space; and a liquid outlet end of the liquid outlet channel is communicated with the lower space.
2. The oil-water separator according to claim 1, wherein a plurality of first auxiliary plates are fixed at the bottom plate, a plurality of second auxiliary plates fixedly connected with the second partition plate are arranged below the second partition plate, and a second through hole is formed at the top end of each second auxiliary plate.
3. The separator as claimed in claim 2, wherein the number of the first auxiliary plates is 1 or more and 10 or less, preferably 3 to 5; the number of the second auxiliary plates is more than or equal to 1 and less than or equal to 10, preferably 2-4; the first auxiliary plate and the second auxiliary plate are both flat plates.
4. The separator as claimed in claim 2, wherein the angle between the first auxiliary plate and the bottom plate is between 80-100 degrees, preferably 90 degrees; the included angle between the second auxiliary plate and the second partition plate is 70-110 degrees, and preferably 85-95 degrees; the included angle between the second clapboard and the bottom plate is between 5 and 80 degrees, and preferably between 10 and 40 degrees.
5. The oil-water separator according to claim 1, wherein an oil collection tank is provided in the intermediate space, the oil outlet communicating with the space in the oil collection tank, and the second partition plate has a through hole therein communicating with the space in the oil collection tank.
6. The oil-water separator according to claim 1, wherein the top end of the box body is provided with an opening, and the side plates of the box body comprise a first side plate, a second side plate, a third side plate and a fourth side plate; the higher end of the second partition plate is fixedly connected with the second side plate; the box body is also internally provided with a partition vertical plate fixedly connected with the bottom plate, the partition vertical plate is positioned between the first side plate and the second side plate, the partition vertical plate is also positioned between the first side plate and the second partition plate, and a gap for communicating an intermediate space and a lower space is formed between the lower ends of the partition vertical plate and the second partition plate; the partition vertical plate divides the space in the box body into a first space close to the first side plate and a second space close to the second side plate, the middle space and the lower space are both positioned in the second space, and the water outlet hole is communicated with the first space; the top end of the separation vertical plate is lower than the lowest end of the oil outlet by 0.1-2cm, preferably 0.5-1 cm.
7. The oil-water separator according to claim 1, wherein the partition riser is further connected with a first riser through a connecting plate, the first partition is further connected with a second riser, the second riser is located between the partition riser and the first riser, and the top end of the first riser and the top end of the partition riser are both higher than the bottom end of the second riser; the top end of the first vertical plate is lower than the top end of the separation vertical plate; the first vertical plate, the second vertical plate and the connecting plate are all located in the middle space.
8. The oil-water separator of claim 1, wherein the lower liquid orifice has a weep net; the bottom end of the first auxiliary plate is provided with a first through hole; the box still has the feed opening, the feed opening with below space intercommunication, feed opening department has stopper portion.
9. The oil-water separator according to claim 1, wherein the case has a rectangular parallelepiped shape, the first partition is a rectangular plate, the drain hole is located at one corner of the first partition, and one corner of the first partition having the drain hole is lower than the remaining three corners; the second partition board is a rectangular board, the through hole is positioned at one corner of the second partition board, and one corner of the through hole of the second partition board is higher than the other three corners; the second auxiliary plate is a rectangular plate, the second through holes on the second auxiliary plate are positioned at one corner of the top end of the second auxiliary plate, and for each second auxiliary plate, one corner with the second through holes is higher than the other three corners.
10. The oil-water separator according to claim 1, wherein the first through hole is a through hole formed in the first auxiliary plate, or is surrounded by a corner of the first auxiliary plate, the side plate, and the bottom plate; the second through hole is formed in the second auxiliary plate, or is formed by surrounding one unfilled corner of the second auxiliary plate, the side plate and the second partition plate; the lower liquid channel is formed by surrounding a side plate and a channel plate of the box body, and the lower liquid channel penetrates through the middle space.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910749612.3A CN112386958A (en) | 2019-08-14 | 2019-08-14 | Oil-water separator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910749612.3A CN112386958A (en) | 2019-08-14 | 2019-08-14 | Oil-water separator |
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|---|---|
| CN112386958A true CN112386958A (en) | 2021-02-23 |
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|---|---|---|---|
| CN201910749612.3A Pending CN112386958A (en) | 2019-08-14 | 2019-08-14 | Oil-water separator |
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| CN204138639U (en) * | 2014-09-24 | 2015-02-04 | 安徽天成油脂有限公司 | grease separating tank |
| CN207418532U (en) * | 2017-10-30 | 2018-05-29 | 辽宁宝来生物能源有限公司 | Reverse isolation of purified pond |
| CN211798976U (en) * | 2019-08-14 | 2020-10-30 | 扬州悦美达厨具科技有限公司 | Oil-water separator |
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