CN210710832U - Oxidative dehydrogenation waste water stripping system - Google Patents
Oxidative dehydrogenation waste water stripping system Download PDFInfo
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- CN210710832U CN210710832U CN201921357095.7U CN201921357095U CN210710832U CN 210710832 U CN210710832 U CN 210710832U CN 201921357095 U CN201921357095 U CN 201921357095U CN 210710832 U CN210710832 U CN 210710832U
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Abstract
The utility model relates to an oxidative dehydrogenation waste water strip system, including the waste water strip tower, waste water strip tower middle part is connected with oxidative dehydrogenation unit pickling tower, is equipped with into discharge heat exchanger between waste water strip tower and the oxidative dehydrogenation unit pickling tower, and waste water strip tower bottom is connected with ejection of compact system through into discharge heat exchanger, and ejection of compact system is connected with sewage treatment plant, and waste water strip tower bottom is connected with heating system, and waste water strip tower forms the circulation with heating system, and waste water strip tower top is connected with piece-rate system, and waste water strip tower and piece-rate system form the circulation. The utility model relates to a rigorously reasonable, the waste water that this system was handled has significantly reduced the content of ether organic matter, and waste water after the steam strip is handled by sewage treatment plant again, can effectively alleviate sewage treatment system's burden to reduce the on-the-spot smell of sewage treatment system.
Description
Technical Field
The utility model relates to an oxidative dehydrogenation waste water strip system belongs to sewage treatment technical field, and this system is applied to and reduces the aldehyde organic matter content in the oxidative dehydrogenation waste water.
Background
Butadiene is an important basic chemical raw material, and has many uses in the production of fine chemicals. The production process of butadiene can generate wastewater which contains a large amount of aldehyde organic matters, if the wastewater is directly treated by a sewage treatment plant, the aldehyde organic matters not only increase the burden of a sewage system, but also cause the on-site odor of the sewage treatment system to be overlarge and seriously pollute the environment.
SUMMERY OF THE UTILITY MODEL
According to the not enough among the above prior art, the utility model discloses the technical problem who solves is: provides an oxidative dehydrogenation waste water stripping system to solve the defects.
The utility model discloses an oxidative dehydrogenation waste water stripping system, including the waste water stripper, waste water stripper middle part is connected with oxidative dehydrogenation unit pickling tower, is equipped with into discharge heat exchanger between waste water stripper and the oxidative dehydrogenation unit pickling tower, and waste water stripper bottom is connected with discharging system through into discharge heat exchanger, and discharging system is connected with sewage treatment plant, and waste water stripper bottom is connected with heating system, and waste water stripper and heating system form the circulation, and waste water stripper top is connected with the piece-rate system, and waste water stripper and piece-rate system form the circulation;
the separation system comprises a stripping tower condenser, a stripping tower reflux tank and a stripping tower reflux pump, the stripping tower condenser, the stripping tower reflux tank and the stripping tower reflux pump are sequentially arranged on a circulating pipe formed by the wastewater stripping tower and the separation system, and the separation system is connected with the out-of-bounds area.
Preferably, the top of the reflux tank of the stripping tower is connected with a flare system, and the flare system is a special combustion facility for treating combustible and combustible toxic gases and steam which cannot be recovered and reprocessed in petrochemical plants, oil refineries, chemical plants and other plants or devices, and is an important measure for ensuring the safe production of the plants and reducing the environmental pollution.
Preferably, a reboiler circulating pump and a reboiler of the stripping tower are sequentially arranged on a circulating pipeline formed by the wastewater stripping tower and the heating system, low-pressure steam is arranged in the heating system, and the specification of the low-pressure steam is 1.0MPa (G) and 240 ℃. After the wastewater at the bottom of the wastewater stripping tower is heated by low-pressure steam of a heating system, aldehydes, ketones and the like in the wastewater are extracted from the tower top and enter a separation system.
Preferably, the discharging system is provided with a stripper tower bottom pump and a wastewater cooler, the stripper tower bottom pump is connected with the feeding and discharging heat exchanger, and the wastewater cooler is connected with a sewage treatment plant. The wastewater at the bottom of the wastewater stripping tower is high-temperature wastewater after stripping, and can enter a sewage treatment system after being cooled.
The working principle and the process are as follows:
waste water from an oxidative dehydrogenation unit acid washing tower enters the middle part of a waste water stripping tower after heat exchange through a feeding and discharging heat exchanger, waste water at the bottom of the waste water stripping tower is heated by low-pressure steam through a stripping tower reboiler, aldehydes, ketones and the like in the waste water are extracted from the top of the waste water stripping tower, a gas phase at the top of the stripping tower is condensed by a stripping tower condenser and then enters a stripping tower reflux tank, waste gas rich in the aldehydes, ketones and the like is discharged into a torch system from the top of the stripping tower reflux tank, and liquid phase materials containing the aldehydes, the ketones and the water are conveyed to the top. High-temperature wastewater after steam stripping at the bottom of the wastewater stripper enters a bottom pump of the stripper through a wastewater inlet and outlet heat exchanger, is cooled by a wastewater cooler and then is sent to a sewage treatment plant.
The key components are acetone and water, and the effect of the wastewater stripping tower is mainly influenced by the following three factors:
1. feed position
The closer the feed position is to the top of the column, the lower the acetone content in the bottom water.
2. Reflux ratio
The reflux ratio was 5. The larger the reflux ratio, the lower the acetone content in the bottom water, but the larger the energy consumption of the column.
3. Pressure at the top of the column
Acetone is not sensitive to pressure, the higher the operating pressure is, the higher the operating temperature of the column is, and the higher the energy consumption is.
Compared with the prior art, the utility model beneficial effect who has is:
the utility model relates to a rigorously reasonable, the waste water that this system was handled has significantly reduced aldehyde organic matter content, and waste water after the strip is handled by sewage treatment plant again, can effectively alleviate sewage treatment system's burden to reduce the on-the-spot smell of sewage treatment system.
Drawings
FIG. 1 is a schematic flow diagram of an oxidative dehydrogenation waste water stripping system;
in the figure: 1. an oxidative dehydrogenation unit acid washing tower; 2. a heating system; 3. a wastewater stripper; 4. a stripper condenser; 5. a stripping tower reflux drum; 6. a boundary area is formed; 7. a separation system; 8. a stripper reflux pump; 9. a sewage treatment plant; 10. a discharge system; 11. a wastewater cooler; 12. a stripper bottom pump; 13. a charge and discharge heat exchanger; 14. a stripper reboiler; 15. the reboiler circulates the pump.
Detailed Description
Embodiments of the present invention are further described below with reference to the accompanying drawings:
as shown in fig. 1, an oxidative dehydrogenation wastewater stripping system comprises a wastewater stripping tower 3, wherein the middle part of the wastewater stripping tower 3 is connected with an oxidative dehydrogenation unit pickling tower 1, a feeding and discharging heat exchanger 13 is arranged between the wastewater stripping tower 3 and the oxidative dehydrogenation unit pickling tower 1, the bottom of the wastewater stripping tower 3 is connected with a discharging system 10 through the feeding and discharging heat exchanger 13, the discharging system 10 is connected with a sewage treatment plant 9, the bottom of the wastewater stripping tower 3 is connected with a heating system 2, the wastewater stripping tower 3 and the heating system 2 form a circulation, the top of the wastewater stripping tower 3 is connected with a separation system 7, and the wastewater stripping tower 3 and the separation system 7 form a circulation;
the separation system 7 comprises a stripping tower condenser 4, a stripping tower reflux tank 5 and a stripping tower reflux pump 8, the stripping tower condenser 4, the stripping tower reflux tank 5 and the stripping tower reflux pump 8 are sequentially arranged on a circulating pipe formed by the wastewater stripping tower 3 and the separation system 7, and the separation system 7 is connected with the out-of-bounds area 6.
The top of the reflux tank 5 of the stripping tower is connected with a flare system, and the flare system is a special combustion facility for treating combustible and combustible toxic gases and steam which cannot be recovered and reprocessed in petrochemical plants, oil refineries, chemical plants and other plants or devices, and is an important measure for ensuring the safe production of the plants and reducing the environmental pollution.
A reboiler circulating pump 15 and a stripper reboiler 14 are sequentially arranged on a circulating pipeline formed by the wastewater stripping tower 3 and the heating system 2, low-pressure steam is arranged in the heating system 2, and the specification of the low-pressure steam is 1.0MPa (G) and 240 ℃. After the wastewater at the bottom of the wastewater stripping tower 3 is heated by the low-pressure steam of the heating system 2, aldehydes, ketones and the like in the wastewater are extracted from the top of the tower and enter a separation system 7.
The discharging system 10 is provided with a stripping tower bottom pump 12 and a wastewater cooler 11, the stripping tower bottom pump 12 is connected with a feeding and discharging heat exchanger 13, and the wastewater cooler 11 is connected with a sewage treatment plant 9. The wastewater at the bottom of the wastewater stripping tower 3 is high-temperature wastewater after stripping, and can enter a sewage treatment system after being cooled.
Waste water from an oxidative dehydrogenation unit acid washing tower enters the middle part of a waste water stripping tower 3 after heat exchange through a feeding and discharging heat exchanger 13, waste water at the bottom of the waste water stripping tower 3 is heated by low-pressure steam through a stripping tower reboiler 14, aldehydes, ketones and the like in the waste water are extracted from the top of the waste water stripping tower 3, a gas phase at the top of the stripping tower is condensed through a stripping tower condenser 4 and then enters a stripping tower reflux tank 5, waste gas rich in the aldehydes, ketones and the like is discharged into a torch system from the top of the stripping tower reflux tank 5, and liquid phase materials containing the aldehydes, the ketones and the water are conveyed to the top of. The stripped high-temperature wastewater at the bottom of the wastewater stripping tower 3 enters a tower bottom pump 12 of the stripping tower after passing through a wastewater inlet and outlet heat exchanger 13, and is then sent to a sewage treatment plant 9 after being cooled by a wastewater cooler 11.
The key components are acetone and water, and the effect of the wastewater stripping tower is mainly influenced by the following three factors:
1. feed position
The closer the feed position is to the top of the column, the lower the acetone content in the bottom water.
2. Reflux ratio
The reflux ratio was 5. The larger the reflux ratio, the lower the acetone content in the bottom water, but the larger the energy consumption of the column.
3. Pressure at the top of the column
Acetone is not sensitive to pressure, the higher the operating pressure is, the higher the operating temperature of the column is, and the higher the energy consumption is.
The utility model relates to a rigorously reasonable, the waste water that this system was handled has significantly reduced the content of ether organic matter, and the waste water after the steam stripping is handled by sewage treatment plant 9 again, can effectively alleviate sewage treatment system's burden to reduce the on-the-spot smell of sewage treatment system.
Claims (5)
1. An oxidative dehydrogenation waste water stripping system comprises a waste water stripping tower (3), and is characterized in that: the middle part of the wastewater stripping tower (3) is connected with the oxidative dehydrogenation unit pickling tower (1), a feeding and discharging heat exchanger (13) is arranged between the wastewater stripping tower (3) and the oxidative dehydrogenation unit pickling tower (1), the bottom of the wastewater stripping tower (3) is connected with a discharging system (10) through the feeding and discharging heat exchanger (13), the discharging system (10) is connected with a sewage treatment plant (9), the bottom of the wastewater stripping tower (3) is connected with a heating system (2), the wastewater stripping tower (3) and the heating system (2) form circulation, the top of the wastewater stripping tower (3) is connected with a separation system (7), and the wastewater stripping tower (3) and the separation system (7) form circulation;
the separation system (7) comprises a stripping tower condenser (4), a stripping tower reflux tank (5) and a stripping tower reflux pump (8), the stripping tower condenser (4), the stripping tower reflux tank (5) and the stripping tower reflux pump (8) are sequentially arranged on a circulating pipe formed by the wastewater stripping tower (3) and the separation system (7), and the separation system (7) is connected with the out-of-bounds area (6).
2. The oxidative dehydrogenation waste water stripping system as claimed in claim 1, characterized in that: the top of the stripping tower reflux tank (5) is connected with a flare system.
3. The oxidative dehydrogenation waste water stripping system as claimed in claim 1, characterized in that: and a reboiler circulating pump (15) and a stripping tower reboiler (14) are sequentially arranged on a circulating pipeline formed by the wastewater stripping tower (3) and the heating system (2).
4. The oxidative dehydrogenation waste water stripping system as claimed in claim 1, characterized in that: the discharging system (10) is provided with a stripping tower bottom pump (12) and a wastewater cooler (11), the stripping tower bottom pump (12) is connected with a feeding and discharging heat exchanger (13), and the wastewater cooler (11) is connected with a sewage treatment plant (9).
5. The oxidative dehydrogenation waste water stripping system as claimed in claim 1, characterized in that: the heating system (2) is internally provided with low-pressure steam, and the specification of the low-pressure steam is 1.0MPa (G) and 240 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921357095.7U CN210710832U (en) | 2019-08-20 | 2019-08-20 | Oxidative dehydrogenation waste water stripping system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921357095.7U CN210710832U (en) | 2019-08-20 | 2019-08-20 | Oxidative dehydrogenation waste water stripping system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210710832U true CN210710832U (en) | 2020-06-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921357095.7U Active CN210710832U (en) | 2019-08-20 | 2019-08-20 | Oxidative dehydrogenation waste water stripping system |
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| Country | Link |
|---|---|
| CN (1) | CN210710832U (en) |
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2019
- 2019-08-20 CN CN201921357095.7U patent/CN210710832U/en active Active
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