CN216584269U - Recovery unit sewage treatment system - Google Patents
Recovery unit sewage treatment system Download PDFInfo
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- CN216584269U CN216584269U CN202123097958.1U CN202123097958U CN216584269U CN 216584269 U CN216584269 U CN 216584269U CN 202123097958 U CN202123097958 U CN 202123097958U CN 216584269 U CN216584269 U CN 216584269U
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Abstract
The utility model relates to a sewage treatment system of a recovery device, which comprises a rectifying tower, a stripping tower, a sewage pool and a waste gas treatment device, wherein a liquid outlet of the rectifying tower is connected with a liquid inlet of the stripping tower, a liquid outlet of the stripping tower is connected with a liquid inlet of the sewage pool, and an exhaust port of the stripping tower is connected with the waste gas treatment device. According to the recovery device sewage treatment system, the COD value of the produced sewage is obviously reduced, the effect is obvious, the load of a common project on sewage treatment can be effectively reduced, the sewage treatment time is saved, the cost is saved, and the consumption is reduced.
Description
Technical Field
The utility model belongs to the technical field of sewage treatment systems, and relates to a sewage treatment system of a recovery device.
Background
Polybutylene terephthalate adipate (PBAT) is an excellent degradable material and is a main product for replacing traditional plastics. The preparation raw materials mainly take Adipic Acid (AA), terephthalic acid (PTA) and Butanediol (BDO) as raw materials, and the final product is prepared by esterification, polycondensation and grain cutting. In the esterification reaction, partial BDO undergoes cyclodehydration to generate a mixture of water, tetrahydrofuran (THF for short) and the like, the mixture is sent to a recovery device for primary purification to prepare a high-purity THF finished product, however, the recovery device can generate wastewater in the rectification and purification process, the COD value (organic matter pollution parameter) of the wastewater is as high as about 30000mg/L, and huge burden is brought to a sewage treatment system in subsequent public works.
Therefore, it is very important to research a system capable of reducing COD in wastewater and relieving the pressure of a sewage treatment system in public works.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problem that a sewage treatment system in public works is difficult to treat due to the fact that a recovery device generates high COD (chemical oxygen demand) wastewater in the rectification and purification process in the prior art, and provides the sewage treatment system of the recovery device. The process of the rectifying tower → the wastewater storage tank → the stripping tower → the sewage tank can effectively reduce the COD value in the production sewage and greatly reduce the pressure of the sewage treatment system of the public engineering; and the generated sewage is conveyed to a public engineering for further treatment by a conveying pump, and reaches the national discharge standard.
In order to achieve the purpose, the technical scheme adopted by the utility model is as follows:
the utility model provides a recovery unit sewage treatment system, includes rectifying column, strip tower, effluent water sump and exhaust treatment device, and the liquid outlet of rectifying column is connected with the inlet of strip tower, and the liquid outlet of strip tower is connected with the inlet of effluent water sump, and the gas vent and the exhaust treatment device of strip tower are connected.
When the recovery device in the prior art is adopted, sewage enters a public engineering after being discharged from a liquid outlet of the rectifying tower, the COD value of the wastewater discharged from the liquid outlet of the rectifying tower is about 30000mg/L, and huge burden is brought to a sewage treatment system in the subsequent public engineering. When the recovery device sewage treatment system is used for treating sewage, the sewage is discharged from the liquid outlet of the rectifying tower, enters the wastewater storage tank, enters the stripping tower and enters the public works, the COD value of the wastewater discharged from the liquid outlet of the stripping tower is about 9000mg/L, and is remarkably reduced relative to 30000mg/L, so that the pressure of the sewage treatment system in the subsequent public works is effectively reduced. By comparison, the sewage treatment system of the recovery device can obviously reduce the COD value of the wastewater.
As a preferred technical scheme:
as above a recovery unit sewage treatment system, the strip tower is the packed tower, sewage passes through the waste water spraying system that the delivery pump got into the strip tower top, from top to bottom move, strip tower bottom lets in steam, from bottom to top motion, both are in packing layer department contact reaction, take place the mass transfer, waste water and steam carry out high-efficient separation after stripping the mass transfer through a plurality of times, the harmful substance of waste water gets into the vapor phase, taken away by steam, steam upward movement gets into exhaust treatment device, and the waste water after the purification gets into strip tower stock solution portion because of the action of gravity, later the rethread circulating pump is sent to the effluent water sump.
The sewage treatment system of the recovery device further comprises a wastewater storage tank (for storing and caching the THF mixture to ensure stable working conditions of the rectifying tower), and the liquid outlet of the rectifying tower is connected with the liquid inlet of the stripping tower through the wastewater storage tank.
As above, the wastewater storage tank is vertically arranged, the liquid inlet of the wastewater storage tank is positioned at the top end and connected with the liquid outlet of the rectifying tower through the first conveying pump, and the liquid outlet of the wastewater storage tank is positioned at the bottom end and connected with the liquid inlet of the stripping tower through the second conveying pump.
According to the sewage treatment system of the recovery device, the liquid outlet of the stripping tower is connected with the liquid inlet of the sewage pool through the third conveying pump.
According to the recovery device sewage treatment system, the waste gas treatment device is a flame combustion waste gas treatment device, gas separated by the stripping tower enters the flame combustion waste gas treatment device, and combustion can be used as a heat source of a production device, so that energy is saved, and production cost is reduced.
Has the advantages that:
according to the sewage treatment system of the recovery device, the COD value of the produced sewage is obviously reduced, and the effect is obvious; the burden of the common engineering on sewage treatment can be effectively reduced; saving sewage treatment time, saving cost and reducing consumption.
Drawings
FIG. 1 is a schematic view of a recovery unit sewage treatment system of the present invention;
the system comprises a rectifying tower 1, a wastewater storage tank 2, a stripping tower 3, a sewage tank 4, a waste gas treatment device 5, a first delivery pump 6, a second delivery pump 7 and a third delivery pump 8.
Detailed Description
The utility model will be further illustrated with reference to specific embodiments. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
A recovery device sewage treatment system, as shown in fig. 1, comprising a rectifying tower 1, a stripping tower 3, a sewage tank 4, a waste water storage tank 2 and a waste gas treatment device 5;
the stripping tower 3 is a packed tower; the waste gas treatment device 5 is a flame combustion waste gas treatment device;
the waste water storage tank 2 is vertically arranged, a liquid inlet of the waste water storage tank is positioned at the top end, and a liquid outlet of the waste water storage tank is positioned at the bottom end;
the liquid outlet of rectifying column 1 is connected the inlet of waste water storage tank 2 through first delivery pump 6, and the liquid outlet of waste water storage tank 2 is connected the inlet of strip tower 3 through second delivery pump 7, and the liquid outlet of strip tower 3 is connected the inlet of effluent water sump 4 through third delivery pump 8, and the gas vent and the exhaust treatment device 5 of strip tower 3 are connected.
When the recovery device in the prior art is adopted, sewage enters a public engineering after being discharged from a liquid outlet of the rectifying tower, the COD value of the wastewater discharged from the liquid outlet of the rectifying tower is about 30000mg/L, and huge burden is brought to a sewage treatment system in the subsequent public engineering. When the recovery device sewage treatment system is used for treating sewage, the sewage is discharged from the liquid outlet of the rectifying tower 1, then enters the waste water storage tank 2, then enters the stripping tower 3, and then enters the main pipe of the public works, the COD value of the waste water discharged from the liquid outlet of the stripping tower 3 is about 9000mg/L, the COD value is obviously reduced relative to 30000mg/L, and the pressure of the sewage treatment system in the subsequent public works is effectively reduced. By comparison, the sewage treatment system of the recovery device can obviously reduce the COD value of the wastewater.
Claims (6)
1. The utility model provides a recovery unit sewage treatment system which characterized in that, includes rectifying column, strip tower, effluent water sump and exhaust treatment device, and the liquid outlet of rectifying column is connected with the inlet of strip tower, and the liquid outlet of strip tower is connected with the inlet of effluent water sump, and the gas vent and the exhaust treatment device of strip tower are connected.
2. The recycling apparatus sewage treatment system according to claim 1, wherein the stripping tower is a packed tower.
3. The sewage treatment system of the recycling device according to claim 1 or 2, further comprising a waste water storage tank, wherein the liquid outlet of the rectifying tower is connected with the liquid inlet of the stripping tower through the waste water storage tank.
4. The sewage treatment system of the recycling device according to claim 3, wherein the waste water storage tank is vertically arranged, and has a liquid inlet at the top end connected with the liquid outlet of the rectifying tower through a first conveying pump, and has a liquid outlet at the bottom end connected with the liquid inlet of the stripping tower through a second conveying pump.
5. The sewage treatment system of the recycling device of claim 1, wherein the liquid outlet of the stripping tower is connected with the liquid inlet of the sewage pool through a third transfer pump.
6. The recycling apparatus sewage treatment system of claim 1 wherein the exhaust treatment device is a flame combustion exhaust treatment device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123097958.1U CN216584269U (en) | 2021-12-10 | 2021-12-10 | Recovery unit sewage treatment system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123097958.1U CN216584269U (en) | 2021-12-10 | 2021-12-10 | Recovery unit sewage treatment system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216584269U true CN216584269U (en) | 2022-05-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202123097958.1U Active CN216584269U (en) | 2021-12-10 | 2021-12-10 | Recovery unit sewage treatment system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115006865A (en) * | 2022-07-22 | 2022-09-06 | 湖南东为化工新材料有限公司 | Method for treating wastewater generated in caprolactone preparation |
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2021
- 2021-12-10 CN CN202123097958.1U patent/CN216584269U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115006865A (en) * | 2022-07-22 | 2022-09-06 | 湖南东为化工新材料有限公司 | Method for treating wastewater generated in caprolactone preparation |
| CN115006865B (en) * | 2022-07-22 | 2023-11-21 | 湖南东为化工新材料有限公司 | Wastewater treatment method for caprolactone preparation |
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