CN111135608A - Alkaline washing tower system for continuous oil-water separation of oily wastewater - Google Patents
Alkaline washing tower system for continuous oil-water separation of oily wastewater Download PDFInfo
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- CN111135608A CN111135608A CN202010093092.8A CN202010093092A CN111135608A CN 111135608 A CN111135608 A CN 111135608A CN 202010093092 A CN202010093092 A CN 202010093092A CN 111135608 A CN111135608 A CN 111135608A
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- alkali
- oil
- baffle
- washing tower
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- 238000000926 separation method Methods 0.000 title claims abstract description 96
- 238000005406 washing Methods 0.000 title claims abstract description 84
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 48
- 239000002351 wastewater Substances 0.000 title claims abstract description 24
- 239000003513 alkali Substances 0.000 claims abstract description 126
- 239000007788 liquid Substances 0.000 claims abstract description 63
- 239000002699 waste material Substances 0.000 claims abstract description 38
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 9
- 239000010962 carbon steel Substances 0.000 claims description 9
- 238000004891 communication Methods 0.000 claims description 6
- 239000002585 base Substances 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 235000014121 butter Nutrition 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 6
- 239000003518 caustics Substances 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000004519 grease Substances 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 238000005882 aldol condensation reaction Methods 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 150000001345 alkine derivatives Chemical class 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
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- 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
-
- 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
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- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physical Water Treatments (AREA)
Abstract
The invention discloses an alkali washing tower system for continuous oil-water separation of oily wastewater, which comprises a medium-alkali circulating pump, a strong-alkali circulating pump, a water washing pump, a weak-alkali circulating pump and an alkali washing tower, wherein the alkali washing tower is sequentially provided with a water washing section, a strong-alkali section, a medium-alkali section and a weak-alkali section from top to bottom, the bottom of the water washing section is connected with the top of the water washing section through the water washing pump, the strong-alkali section is connected with the medium-alkali section through the strong-alkali circulating pump, the medium-alkali section is connected with the weak-alkali section through the medium-alkali circulating pump, the weak-alkali circulating pump is communicated with the bottom of the alkali washing tower through a pipeline, an oblique flow baffle is obliquely arranged at the position, close to the bottom, of the alkali washing tower is vertically provided with a first oil separation baffle, and an oil separation. The invention can utilize the density difference of oil and water to carry out continuous oil-water separation, and the waste alkali liquor and the butter are separated and then sent to other devices for treatment through liquid level control, thereby ensuring the continuous and stable operation of the alkaline washing tower system.
Description
Technical Field
The invention relates to the technical field of chemical industry, in particular to an alkali washing tower system for continuous oil-water separation of oily wastewater.
Background
In the existing technology of preparing olefin from methanol, a caustic tower is generally arranged in the process, and acid gas in process gas is absorbed by using lye in the caustic tower. Because the process gas contains dialkene with strong reducibility, a small amount of alkyne and some oxygen-containing compounds, aldol condensation reaction is easy to occur in the alkaline environment of the alkaline tower, and polymers such as butter and the like are generated. On one hand, the mixed liquid of the oil phase and the alkali liquor is easy to gather to block the tower plate of the alkaline washing tower, and the alkaline washing effect is influenced; on the other hand, the butter mixed and deposited in the waste liquid in the tower bottom is easy to block a conveying pipeline and equipment in the conveying process, and can cause the system to stop when serious, thereby influencing the normal production of the device, and the alkali washing tower system for the continuous oil-water separation of the oily waste water is provided.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides an alkali washing tower system for continuous oil-water separation of oily wastewater.
In order to achieve the purpose, the invention adopts the following technical scheme:
a continuous oil-water separation alkaline washing tower system for oily wastewater comprises a medium-alkali circulating pump, a strong-alkali circulating pump, a water washing pump, a weak-alkali circulating pump and an alkaline washing tower, wherein the alkaline washing tower is sequentially provided with a water washing section, a strong alkali section, a medium-alkali section and a weak-alkali section from top to bottom, the bottom of the water washing section is connected with the top through the water washing pump, the strong alkali section is connected with the medium-alkali section through the strong-alkali circulating pump, the medium-alkali section is connected with the weak-alkali section through the medium-alkali circulating pump, the weak-alkali circulating pump is communicated with the bottom of the alkaline washing tower through a pipeline, an oblique flow baffle is obliquely arranged at a position, close to the bottom, of the alkaline washing tower, a first oil separation baffle is vertically arranged at the bottom of the alkaline washing tower, a second oil separation baffle is arranged at a position, close to the top end of the first oil separation baffle, a bottom plate is connected between the second oil separation baffle and the inner wall of the alkaline washing tower, and the first oil separation baffle and the inner wall, the system comprises an alkali washing tower, an inclined flow baffle, a first oil separation baffle, a second oil separation baffle and an alkali washing tower inner wall, wherein the alkali washing tower inner wall is close to the lower portion of the second oil separation baffle to form an alkali waste liquid cavity, the inclined flow baffle, the second oil separation baffle and the alkali washing tower inner wall are close to the second oil separation baffle to form an oil separation cavity, the alkali washing tower is close to the position of the alkali waste liquid cavity and is provided with an alkali waste liquid level control system, and the alkali washing tower is close to the position of the oil separation cavity and is provided with an oil phase level control system.
Further, the waste alkali liquid level control system comprises a water phase outlet pipeline, a waste alkali liquid level control valve is arranged on the water phase outlet pipeline, a first liquid level meter is arranged at the position close to the bottom of the waste alkali liquid cavity, and the first liquid level meter is in communication connection with the waste alkali liquid level control valve.
Furthermore, the oil phase liquid level control system comprises an oil phase outlet pipeline, an oil phase liquid level control valve is arranged on the oil phase outlet pipeline, a second liquid level meter is arranged at a position close to the oil separation cavity, and the second liquid level meter is in communication connection with the oil phase liquid level control valve.
Furthermore, the oblique flow baffle plate inclines 25 degrees towards the bottom of the alkaline washing tower and is welded at the position of 5050 mm height of the inner wall of the alkaline washing tower, the oblique flow baffle plate is in an arc shape, the height of the bottom of the arc surface is 1150 mm, the oblique flow baffle plate is made of carbon steel, and the thickness of the oblique flow baffle plate is 10 mm.
Further, the first oil separation baffle is vertically welded at a position which is 800 mm away from the inner wall of the alkaline washing tower and close to the installation side of the oblique flow baffle, the direction of the first oil separation baffle is parallel to the arc bottom of the oblique flow baffle, the vertical height of the first oil separation baffle is 3700 mm, the first oil separation baffle is made of carbon steel, and the thickness of the first oil separation baffle is 10 mm.
Further, the oil separation cavity bottom plate is welded at the 2500 mm height of the inner wall of the alkaline tower, the bottom plate is in the shape of an arc, the height of the bottom of the arc is 400 mm, the second oil separation baffle is vertically welded at the upper part of the bottom edge of the bottom plate, the height of the second oil separation baffle is 1000 mm, the second oil separation baffle is made of carbon steel, and the thickness of the second oil separation baffle is 10 mm.
Further, the volume of the waste alkali liquor cavity is 9 cubic meters.
Further, the volume of the oil separation cavity is 0.8 cubic meter.
The invention has the beneficial effects that:
1. the density difference of oil and water can be utilized to carry out continuous oil-water separation, and the waste alkali liquor and the butter are separated and then are sent to other devices for treatment through liquid level control.
2. The continuous separation of oil phase and water phase in the oily wastewater can be continuously carried out, the alkali washing effect is effectively ensured, the frequency that the oily wastewater is easy to block a conveying pipeline and equipment in the conveying process is reduced, and the continuous and stable operation of an alkali washing system is ensured.
3. By controlling the liquid levels of the waste alkali liquor cavity and the oil separation cavity, the continuous separation of the oily wastewater at the bottom of the alkali washing tower is realized, the problem of grease accumulation and blockage in the alkali washing tower is reduced, and the continuous and stable operation of an alkali washing tower system is ensured.
Drawings
FIG. 1 is a schematic structural diagram of an alkaline washing tower system for continuous oil-water separation of oily wastewater, which is provided by the invention;
FIG. 2 is a partial schematic view of one side of a tower still of a caustic wash tower system for continuous oil-water separation of oily wastewater provided by the invention
FIG. 3 is a partial schematic view of the other side of the tower still of the alkaline washing tower system for continuous oil-water separation of oily wastewater provided by the invention
FIG. 4 is a schematic cross-sectional view of a tower bottom of a caustic washing tower system for continuous oil-water separation of oily wastewater, which is provided by the invention.
In the figure: 1 alkaline washing tower, 2 weak base circulation chamber, 3 waste alkali liquid chamber, 4 oil separating chambers, 5 oblique flow baffles, 6 first oil separating baffles, 7 second oil separating baffles, 8 weak base circulating pump, 9 oil phase liquid level control valve, 10 waste alkali liquid level control valve, 11 medium alkali circulating pump, 12 strong base circulating pump, 13 washing pump.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1-4, an alkali washing tower system for continuous oil-water separation of oily wastewater comprises a medium-alkali circulating pump 11, a strong alkali circulating pump 12, a water washing pump 13, a weak alkali circulating pump 8 and an alkali washing tower 1, wherein the alkali washing tower 1 is sequentially provided with a water washing section, a strong alkali section, a medium alkali section and a weak alkali section from top to bottom, the bottom of the water washing section is connected with the top through the water washing pump 13, the strong alkali section is connected with the medium alkali section through the strong alkali circulating pump 12, the medium alkali section is connected with the weak alkali section through the medium alkali circulating pump 11, the weak alkali circulating pump 8 is communicated with the bottom of the weak alkali section and the alkali washing tower 1 through a pipeline, an inclined flow baffle 5 is obliquely arranged at a position close to the bottom of the inner wall of the alkali washing tower 1, a first oil separation baffle 6 is vertically arranged at the bottom of the alkali washing tower 1, a second oil separation baffle 7 is arranged at a position close to the top end of the first oil separation baffle 6 of the inner, the first oil separation baffle 6 and the inner wall of the alkaline tower 1 far away from the second oil separation baffle 7 form a weak alkali circulation cavity 2, the oblique flow baffle 5, the first oil separation baffle 6, the second oil separation baffle 7 and the inner wall of the alkaline tower 1 near the lower part of the second oil separation baffle 7 form an alkali waste liquid cavity 3, the oblique flow baffle 5, the second oil separation baffle 7 and the inner wall of the alkaline tower 1 near the second oil separation baffle 7 form an oil separation cavity 4, a waste alkali liquid level control system is arranged at the position of the alkaline tower 1 near the waste alkali liquid cavity 3, and an oil phase level control system is arranged at the position of the alkaline tower 1 near the oil separation cavity 4.
In the invention, a waste alkali liquid level control system comprises a water phase outlet pipeline, a waste alkali liquid level control valve 10 is arranged on the water phase outlet pipeline, a first liquid level meter is arranged at a position close to the bottom of a waste alkali liquid cavity 3 and is in communication connection with the waste alkali liquid level control valve 10, an oil phase liquid level control system comprises an oil phase outlet pipeline, an oil phase liquid level control valve 9 is arranged on the oil phase outlet pipeline, a second liquid level meter is arranged at a position close to an oil separation cavity 4 and is in communication connection with the oil phase liquid level control valve 9, an inclined flow baffle 5 inclines towards the bottom of an alkaline tower 1 for 25 degrees and is welded at a position 5050 mm height of the inner wall of the alkaline tower 1, the inclined flow baffle 5 is in an arc shape, the height of the arc bottom is 1150 mm, the material is carbon steel, the thickness is 10 mm, the first oil separation baffle 6 is vertically welded at a position 800 mm away from the inner wall of the alkaline tower 1 close to the installation side, the direction of the first oil separation baffle 6 is parallel to the arc bottom of the oblique flow baffle 5, the vertical height of the first oil separation baffle 6 is 3700 mm, the first oil separation baffle is made of carbon steel and 10 mm in thickness, the bottom plate of the oil separation cavity 4 is welded at the 2500 mm height of the inner wall of the alkaline tower 1 and is in an arc shape, the height of the arc bottom is 400 mm, the second oil separation baffle 7 is vertically welded at the upper part of the bottom edge of the bottom plate, the height of the second oil separation baffle 7 is 1000 mm, the first oil separation baffle is made of carbon steel and 10 mm in thickness, the volume of the waste alkali liquor cavity 3 is 9 cubic meters, and the volume of the oil separation cavity 4 is 0.8 cubic meter.
The working principle is as follows: a waste alkali liquid cavity 3 for standing and layering of oil and water is arranged at the tower bottom of an alkali washing tower 1, alkali liquor flowing from a middle alkali section is drained through an inclined flow baffle 5 at the upper part of the waste alkali liquid cavity 3 and flows into a weak alkali circulation cavity 2 at the bottom of the alkali washing tower 1 in the operation process of a system of the alkali washing tower 1, the waste alkali liquid in the weak alkali circulation cavity 2 is circulated through a weak alkali circulation pump 8 through a bottom outlet pipeline, the density of grease is lower than that of the alkali liquor, the liquid level of the weak alkali circulation cavity 2 is increased from top to bottom, the water phase is more in the lower liquid level, the oil phase is more in the upper liquid level, the oil-containing waste alkali liquid automatically flows into the waste alkali liquid cavity 3 through a first oil separation baffle 6, the oil phase is layered in the waste alkali liquid cavity 3 by standing, the oil phase is at the upper part and the water phase is at the lower part, an oil separation cavity 4 for continuous separation is arranged at the upper part in the waste alkali liquid cavity 3, the oil phase automatically flows into, 2200 mm of waste alkali liquid level in the tower kettle is controlled by the waste alkali liquid level control system, 2000 mm of oil phase liquid level is controlled by the oil phase liquid level control system, continuous separation of oil and water is realized from density and liquid level difference, continuous separation of oil-containing waste water at the bottom of the alkaline washing tower is realized, the problem of accumulation and blockage of grease generated in the alkaline washing tower is reduced, and continuous and stable operation of the alkaline washing tower system is ensured.
Having shown and described the basic principles and essential features of the invention and its advantages, it will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof, and it is therefore intended that the embodiments be considered as illustrative and not restrictive in all respects, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, any reference signs in the claims being therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (8)
1. The utility model provides a continuous oil-water separation alkali wash tower system of oiliness waste water, includes well alkali circulating pump (11), strong alkali circulating pump (12), washing pump (13), weak base circulating pump (8) and alkaline wash tower (1), alkaline wash tower (1) from top to bottom is equipped with washing section, strong alkali section, well alkali section and weak alkali section in proper order, washing section bottom is passed through washing pump (13) with the top and is connected, be connected through strong alkali circulating pump (12) between strong alkali section and the well alkali section, be connected through well alkali circulating pump (11) between well alkali section and the weak alkali section, weak alkali circulating pump (8) are through pipeline intercommunication weak alkali section and alkaline wash tower (1) bottom, its characterized in that, alkaline wash tower (1) inner wall is close to bottom position department slope and is provided with oblique flow baffle (5), and alkaline wash tower (1) bottom is provided with first oil removal baffle (6) perpendicularly, alkaline wash tower (1) inner wall is close to first oil removal baffle (6) top position department and is equipped with second oil removal baffle (6), the department is equipped with second oil removal baffle (6) in the (7) The base plate is connected between the second oil separation baffle (7) and the inner wall of the alkaline washing tower (1), the weak alkali circulation cavity (2) is formed by the first oil separation baffle (6) and the inner wall of the alkaline washing tower (1) far away from the second oil separation baffle (7), the waste alkali liquid cavity (3) is formed by the inclined flow baffle (5), the first oil separation baffle (6), the second oil separation baffle (7) and the inner wall of the alkaline washing tower (1) close to the lower part of the second oil separation baffle (7), the oil separation cavity (4) is formed by the inclined flow baffle (5), the second oil separation baffle (7) and the inner wall of the alkaline washing tower (1) close to the second oil separation baffle (7), the alkaline washing tower (1) is close to the position of the waste alkali liquid cavity (3) and is provided with a waste alkali liquid level control system, and the alkaline washing tower (1) is close to the oil phase position of the oil separation cavity (4) and is provided with a liquid level control system.
2. The alkaline washing tower system for continuous oil-water separation of oily wastewater as claimed in claim 1, wherein the waste lye liquid level control system comprises a water phase outlet pipeline, a waste lye liquid level control valve (10) is arranged on the water phase outlet pipeline, a first liquid level meter is arranged near the bottom of the waste lye cavity (3), and the first liquid level meter is in communication connection with the waste lye liquid level control valve (10).
3. The alkaline washing tower system for continuous oil-water separation of oily wastewater as claimed in claim 2, wherein the oil phase liquid level control system comprises an oil phase outlet pipeline, an oil phase liquid level control valve (9) is arranged on the oil phase outlet pipeline, a second liquid level meter is arranged at a position close to the oil separation cavity (4), and the second liquid level meter is in communication connection with the oil phase liquid level control valve (9).
4. The alkaline washing tower system for continuous oil-water separation of oily wastewater as claimed in claim 3, wherein the oblique flow baffle (5) is welded at 5050 mm height on the inner wall of the alkaline washing tower (1) with an inclination of 25 ° towards the bottom of the alkaline washing tower (1), and the oblique flow baffle (5) is arc-shaped, the height of the bottom of the arc is 1150 mm, the material is carbon steel, and the thickness is 10 mm.
5. The alkaline washing tower system for continuous oil-water separation of oily wastewater as claimed in claim 4, wherein the first oil separation baffle (6) is vertically welded at a position which is 800 mm away from the inner wall of the alkaline washing tower (1) close to the installation side of the oblique flow baffle (5), the direction of the first oil separation baffle (6) is parallel to the arc bottom of the oblique flow baffle (5), the vertical height of the first oil separation baffle (6) is 3700 mm, the material is carbon steel, and the thickness is 10 mm.
6. The alkaline washing tower system for continuous oil-water separation of oily wastewater as claimed in claim 1, wherein the oil separation chamber (4) bottom plate is welded at the 2500 mm height of the inner wall of the alkaline washing tower (1), the bottom plate is arc-shaped, the height of the arc-shaped bottom is 400 mm, the second oil separation baffle (7) is vertically welded at the upper part of the bottom edge of the bottom plate, the second oil separation baffle (7) is 1000 mm high, made of carbon steel and 10 mm thick.
7. The alkaline scrubber system for continuous oil-water separation of oily wastewater as claimed in claim 1, wherein the volume of the spent lye chamber (3) is 9 cubic meters.
8. The alkaline washing tower system for continuous oil-water separation of oily wastewater as claimed in claim 1 or 6, wherein the volume of the oil separation chamber (4) is 0.8 cubic meter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010093092.8A CN111135608A (en) | 2020-02-14 | 2020-02-14 | Alkaline washing tower system for continuous oil-water separation of oily wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010093092.8A CN111135608A (en) | 2020-02-14 | 2020-02-14 | Alkaline washing tower system for continuous oil-water separation of oily wastewater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111135608A true CN111135608A (en) | 2020-05-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010093092.8A Pending CN111135608A (en) | 2020-02-14 | 2020-02-14 | Alkaline washing tower system for continuous oil-water separation of oily wastewater |
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| Country | Link |
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| CN (1) | CN111135608A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114100320A (en) * | 2020-08-26 | 2022-03-01 | 万华化学集团股份有限公司 | Alkaline washing tower and method for effectively separating oil from water |
-
2020
- 2020-02-14 CN CN202010093092.8A patent/CN111135608A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114100320A (en) * | 2020-08-26 | 2022-03-01 | 万华化学集团股份有限公司 | Alkaline washing tower and method for effectively separating oil from water |
| CN114100320B (en) * | 2020-08-26 | 2024-08-16 | 万华化学集团股份有限公司 | Alkaline washing tower and method for effectively separating oil from water |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20200728 Address after: 744100 Huamei Avenue, Huating County, Pingliang City, Gansu Province Applicant after: HUATING COAL INDUSTRY GROUP Co.,Ltd. Address before: 744100 Huamei Avenue, Ting county, Pingliang City, Gansu Province Applicant before: Kong Aiping |
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