CN111606800A - Device for recovering acetic acid from waste water - Google Patents
Device for recovering acetic acid from waste water Download PDFInfo
- Publication number
- CN111606800A CN111606800A CN202010519466.8A CN202010519466A CN111606800A CN 111606800 A CN111606800 A CN 111606800A CN 202010519466 A CN202010519466 A CN 202010519466A CN 111606800 A CN111606800 A CN 111606800A
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- China
- Prior art keywords
- valve
- tower
- wastewater
- acetic acid
- pipeline
- Prior art date
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- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 title claims abstract description 45
- 239000002351 wastewater Substances 0.000 title claims abstract description 42
- 238000005406 washing Methods 0.000 claims abstract description 27
- 239000002904 solvent Substances 0.000 claims abstract description 15
- 230000018044 dehydration Effects 0.000 claims description 9
- 238000006297 dehydration reaction Methods 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 239000010865 sewage Substances 0.000 abstract description 4
- 239000008367 deionised water Substances 0.000 abstract description 3
- 238000004065 wastewater treatment Methods 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 description 3
- 239000006227 byproduct Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000005201 scrubbing Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/42—Separation; Purification; Stabilisation; Use of additives
Abstract
The invention discloses a device for recovering acetic acid from wastewater, and belongs to the field of wastewater treatment. The invention is provided with a waste water main valve, the waste water main valve is connected with a high-pressure washing tower, and the waste water main valve is simultaneously connected with a dehydrating tower, an emptying washing tower and a solvent stripping tower. A pipeline is connected between the vent washing tower and the solvent stripping tower, and a pipeline is also connected between the solvent stripping tower and the dehydrating tower. The invention effectively solves the problems of high acetic acid content in the wastewater, reduces the use of the de-ionized water of the device, reduces the production consumption, relieves the sewage treatment consumption and reduces the production cost.
Description
Technical Field
A recovery device, in particular to a device for recovering acetic acid from waste water.
Background
In the production process of Purified Terephthalic Acid (PTA), a by-product water is generated in the oxidation reaction, and due to the physicochemical property of the water, the by-product water can dissolve part of acetic acid and is discharged after being treated by the device, so that the loss of solvent acetic acid and the pressure of sewage treatment are caused. Desalted water, TW for short, is needed by a vent washing tower and a solvent stripping tower in the industrial production process, medium-pressure sealing water, ISW for short, is needed by a high-pressure washing tower, and the huge demand of the desalted water and the medium-pressure sealing water has higher cost.
Disclosure of Invention
Aiming at the defects, the invention provides the device capable of recycling acetic acid in the wastewater, which can effectively solve the problems of high acetic acid content in the wastewater, reduce the use of deionized water of the device, reduce the production consumption, relieve the sewage treatment consumption and reduce the production cost.
The device is provided with a main wastewater valve, one side of the main wastewater valve is connected with wastewater generated by PTA-4 reaction, the other side of the main wastewater valve is connected with one side of a valve e, the other side of the valve e is connected with one side of a check valve d, the other side of the check valve d is connected with one side of a solvent stripping tower, and the top of the solvent stripping tower is connected with the side surface of a dehydration tower. The pipeline between the waste water main valve and the valve e is connected with one side of the valve a, the other side of the valve a is connected with one side of the high-pressure washing tower, the other side of the high-pressure washing tower is connected with the side face of the dehydration tower, a flow meter, a control valve a, a check valve a and a valve b are sequentially arranged on the pipeline between the valve a and the high-pressure washing tower, the flow meter is close to the valve a, the valve b is close to the high-pressure washing tower, the pipeline between the valve b and the high-pressure washing tower is connected with one side of the control valve b, the other side of the control valve b is connected with one side of an ISW hand valve, and the other side. And a pipeline between the valve a and the valve e is connected with one side of a valve c, the other side of the valve c is connected with one side of a check valve b, and the other side of the check valve b is connected with the side surface of the dehydration tower. The pipeline between valve c and the valve e is connected with one side of valve d, the other side of valve d is connected with one side of check valve c, the other side of check valve c is connected with one side of control valve c, the other side of control valve c is connected with one side of blowdown scrubbing tower, the other side of blowdown scrubbing tower is connected with the side of solvent stripping tower, the pipeline between check valve c and the control valve c is connected with one side of TW hand valve, the other side of TW hand valve is connected with TW.
Further, the bottom of the dehydration tower is provided with a ball valve.
Further, control valve b is electrically connected to the ISW hand valve, and control valve c is electrically connected to the TW hand valve.
The working process is as follows: when the wastewater of the PTA-4 reaction is generated, a wastewater main valve is opened, an ISW hand valve and a TW hand valve are closed, a valve a, a control valve a, a check valve a, a valve b, a valve d and a control valve c are opened, the valve c and a valve e are closed, the wastewater flows into a high-pressure washing tower and an emptying washing tower, the residual wastewater is consumed and flows into a dehydration tower for final treatment, and the valve c and the valve e are opened for treatment when the total amount of the wastewater is large. After the wastewater treatment is finished, the control valve b controls the ISW hand valve to be opened, and the control valve c controls the TW hand valve to be opened.
Has the advantages that: the invention effectively solves the problems of high acetic acid content in the wastewater, reduces the use of the de-ionized water of the device, reduces the production consumption, relieves the sewage treatment consumption and reduces the production cost.
Drawings
FIG. 1 is a schematic view of the apparatus according to the present invention.
In the figure, 1, a wastewater main valve, 2, a check valve b, 3, a valve c, 4, a valve d, 5, a check valve c, 6, a valve e, 7, a check valve d, 8, a solvent stripping tower, 9, an emptying washing tower, 10, a control valve c, 11, a TW hand valve, 12, a dewatering tower, 13, a high-pressure washing tower, 14, a valve b, 15, a control valve b, 16, an ISW hand valve, 17, a check valve, 18, a control valve a, 19, a flow meter, 20, a valve a, 21 and a ball valve.
Detailed Description
The following non-limiting examples will allow one of ordinary skill in the art to more fully understand the present invention, but are not intended to limit the invention in any way.
Example 1
The embodiment is provided with a wastewater main valve 1, one side of the wastewater main valve 1 is connected with wastewater generated by PTA-4 reaction, the other side of the wastewater main valve 1 is connected with one side of a valve e6, the other side of the valve e6 is connected with one side of a check valve d7, the other side of the check valve d7 is connected with one side of a solvent stripping tower 8, and the top of the solvent stripping tower 8 is connected with the side surface of a dehydrating tower 12. The pipeline between the waste water main valve 1 and the valve e6 is connected with one side of a valve a20, the other side of the valve a20 is connected with one side of a high-pressure washing tower 13, the other side of the high-pressure washing tower 13 is connected with the side of a dehydrating tower 12, a flow meter 19, a control valve a18, a check valve a17 and a valve b14 are sequentially arranged on the pipeline between the valve a20 and the high-pressure washing tower 13, wherein the flow meter 19 is close to the valve a20, the valve b14 is close to the high-pressure washing tower 13, the pipeline between the valve b14 and the high-pressure washing tower 13 is connected with one side of the control valve b15, the other side of the control valve b15 is connected with one side of an ISW hand valve 16, and the other side of. The pipe between the valve a20 and the valve e6 is connected to one side of the valve c3, the other side of the valve c3 is connected to one side of the check valve b2, and the other side of the check valve b2 is connected to the side of the dehydration tower 12. The line between valve c3 and valve e6 is connected to one side of valve d4, the other side of valve d4 is connected to one side of check valve c5, the other side of check valve c5 is connected to one side of control valve c10, the other side of control valve c10 is connected to one side of vent scrubber 9, the other side of vent scrubber 9 is connected to the side of solvent stripper 8, the line between check valve c5 and control valve c10 is connected to one side of TW hand valve 11, and the other side of TW hand valve 11 is connected to TW. Wherein the bottom of the dehydration tower 12 is provided with a ball valve 21, a control valve b15 is electrically connected with an ISW hand valve 16, and a control valve c10 is electrically connected with a TW hand valve 11.
Example 2
The working process is as follows: when the waste water of PTA-4 reaction is produced, opening waste water main valve 1, closing ISW hand valve 16 and TW hand valve 11, opening valve a20, control valve a18, check valve a17, valve b14, valve d4 and control valve c10, closing valve c3 and valve e6 to make the waste water flow into high-pressure washing tower 13 and emptying washing tower 9, and make the waste water flow into dewatering tower 12 for final treatment, and when the total waste water quantity is large, opening valve c3 and valve e6 to make treatment. After the wastewater treatment is finished, the control valve b15 controls the ISW hand valve to be opened, and the control valve c10 controls the TW hand valve 11 to be opened.
The foregoing examples are provided for illustration and description of the invention only and are not intended to limit the invention to the scope of the described examples. Furthermore, it will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that many variations and modifications may be made in accordance with the teachings of the present invention, which variations and modifications are within the scope of the present invention as claimed.
Claims (5)
1. The device for recovering acetic acid from wastewater is characterized by being provided with a wastewater main valve (1), wherein one side of the wastewater main valve (1) is connected with wastewater generated by PTA-4 reaction, the other side of the wastewater main valve (1) is connected with one side of a valve e (6), the other side of the valve e (6) is connected with one side of a check valve d (7), the other side of the check valve d (7) is connected with one side of a solvent stripping tower (8), and the top of the solvent stripping tower (8) is connected with the side surface of a dewatering tower 1 (12); a pipeline between a waste water main valve (1) and a valve e (6) is connected with one side of a valve a (20), the other side of the valve a (20) is connected with one side of a high-pressure washing tower (13), the other side of the high-pressure washing tower (13) is connected with the side surface of a dewatering tower (12), a flow meter (19), a control valve a (18), a check valve a (17) and a valve b (14) are arranged on a pipeline between the valve a (20) and the high-pressure washing tower (13), a pipeline between the valve b (14) and the high-pressure washing tower (13) is connected with one side of a control valve b (15), the other side of the control valve b (15) is connected with one side of an ISW hand valve (16), and the other side of the ISW hand valve (16) is connected with ISW; a pipeline between the valve a (20) and the valve e (6) is connected with one side of a valve c (3), the other side of the valve c (3) is connected with one side of a check valve b (2), and the other side of the check valve b (2) is connected with the side surface of the dehydration tower (12); the pipeline between the valve c (3) and the valve e (6) is connected with one side of a valve d (4), the other side of the valve d (4) is connected with one side of a check valve c (5), the other side of the check valve c (5) is connected with one side of a control valve c (10), the other side of the control valve c (10) is connected with one side of a vent washing tower (9), the other side of the vent washing tower (9) is connected with the side surface of a solvent stripping tower (8), the pipeline between the check valve c (5) and the control valve c (10) is connected with one side of a TW hand valve (11), and the other side of the TW hand valve (11) is connected with TW.
2. The apparatus for recovering acetic acid from wastewater according to claim 1, wherein a flow meter (19), a control valve a (18), a check valve a (17), and a valve b (14) are provided in this order on the pipe between the valve a (20) and the high pressure scrubber (13), wherein the flow meter (19) is adjacent to the valve a (20), and the valve b (14) is adjacent to the high pressure scrubber (13).
3. The apparatus for recovering acetic acid from wastewater according to claim 1, wherein a ball valve is provided at the bottom of the dehydration tower (12).
4. The apparatus for recovering acetic acid from wastewater according to claim 1, wherein the control valve b (15) is electrically connected to the ISW hand valve (16).
5. The apparatus for recovering acetic acid from wastewater according to claim 1, wherein the control valve c (10) is electrically connected to the TW hand valve (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010519466.8A CN111606800A (en) | 2020-06-09 | 2020-06-09 | Device for recovering acetic acid from waste water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010519466.8A CN111606800A (en) | 2020-06-09 | 2020-06-09 | Device for recovering acetic acid from waste water |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111606800A true CN111606800A (en) | 2020-09-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010519466.8A Pending CN111606800A (en) | 2020-06-09 | 2020-06-09 | Device for recovering acetic acid from waste water |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1749175A (en) * | 2005-07-22 | 2006-03-22 | 中国石化仪征化纤股份有限公司 | Method for recovering aromatic carboxylic acid in waste water |
| US20100121101A1 (en) * | 2008-11-07 | 2010-05-13 | Shaver Ronald D | Methanol carbonylation with improved aldehyde removal |
| CN204938995U (en) * | 2015-06-30 | 2016-01-06 | 嘉兴石化有限公司 | Oxidized waste water cyclic utilization system |
| CN108144418A (en) * | 2017-12-29 | 2018-06-12 | 逸盛大化石化有限公司 | A kind of PTA devices high pressure scrubber spray process |
| CN212610363U (en) * | 2020-06-09 | 2021-02-26 | 恒力石化（大连）有限公司 | Device for recovering acetic acid from waste water |
-
2020
- 2020-06-09 CN CN202010519466.8A patent/CN111606800A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1749175A (en) * | 2005-07-22 | 2006-03-22 | 中国石化仪征化纤股份有限公司 | Method for recovering aromatic carboxylic acid in waste water |
| US20100121101A1 (en) * | 2008-11-07 | 2010-05-13 | Shaver Ronald D | Methanol carbonylation with improved aldehyde removal |
| CN204938995U (en) * | 2015-06-30 | 2016-01-06 | 嘉兴石化有限公司 | Oxidized waste water cyclic utilization system |
| CN108144418A (en) * | 2017-12-29 | 2018-06-12 | 逸盛大化石化有限公司 | A kind of PTA devices high pressure scrubber spray process |
| CN212610363U (en) * | 2020-06-09 | 2021-02-26 | 恒力石化（大连）有限公司 | Device for recovering acetic acid from waste water |
Non-Patent Citations (2)
| Title |
|---|
| 楼灵: "PTA装置自控系统工程设计与实现", 中国优秀硕士学位论文全文数据库信息科技辑, no. 10, 15 October 2010 (2010-10-15), pages 140 - 269 * |
| 顾祥万: "PTA生产降低醋酸单耗的技术", 聚酯工业, no. 04, 25 August 2003 (2003-08-25), pages 36 - 38 * |
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