CN210367352U - Sewage emission reduction system of phthalic anhydride device - Google Patents
Sewage emission reduction system of phthalic anhydride device Download PDFInfo
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- CN210367352U CN210367352U CN201921247782.3U CN201921247782U CN210367352U CN 210367352 U CN210367352 U CN 210367352U CN 201921247782 U CN201921247782 U CN 201921247782U CN 210367352 U CN210367352 U CN 210367352U
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Abstract
The utility model belongs to the technical field of sewage treatment system, concretely relates to phthalic anhydride device sewage emission reduction system. The phthalic anhydride device sewage emission reduction system comprises an oxidation and condensation device, a water washing device, a refining device, a condensate collecting tank, a sewage pool and a sewage treatment device; a condensate draining pipe of the oxidation and condensation device is connected with a condensate collecting tank; the high and low positions of a washing tower of the washing device are respectively connected with a high-position circulating pump, a middle-position circulating pump and a low-position circulating pump in a circulating manner, wherein a water outlet pipe of the high-position circulating pump is connected with machine seal self-flushing pipes of all the circulating pumps; the drain pipes of the washing device and the refining device are connected with the rainwater draining pipe and the sewage pool water inlet pipe, and a lifting converter is arranged at the joint; the sewage tank is connected with the washing device and the sewage treatment device through a sewage treatment pipe. The utility model discloses can reduce phthalic anhydride device sewage discharge, can improve sewage quality to direct utilization again, make the whole recycle of sewage of device, reach the sewage zero release.
Description
Technical Field
The utility model belongs to the technical field of sewage treatment system, concretely relates to phthalic anhydride device sewage emission reduction system.
Background
Most of steam and condensate of the phthalic anhydride device are subjected to fractional separation and comprehensive utilization, but a large amount of sewage is still generated in the production process. When the existing production device is operated, because the water quality of boiler water of the device is ensured, each steam pocket needs to continuously discharge sewage to reduce the salt content and alkalinity of the boiler water, prevent the steam quality from being influenced by overhigh concentration of the boiler water and ensure the conductivity and SiO in the boiler water2And the indexes are qualified. Meanwhile, the sewage is discharged periodically to remove water slag accumulated at the lower part of the boiler and saddle sediment formed after phosphate treatment, and the part of the sewage is often discharged as sewage due to more impurities. In addition, the acid water pump of phthalic anhydride device, phthalic anhydride pump machine seal are with circulating water cooling, for avoiding leaking and causing the circulating water line to corrode because of the machine seal, the circulating water return is the open loop design, and this part return water is collected in the device effluent water sump and is regarded as sewage, handles the back and discharges, has both caused the circulating water extravagant, has increased device sewage emission again. The sewage of the whole device is collected in a sewage tank, and is pumped into a public water treatment workshop for treatment through a sewage pump due to poor water quality, and then is discharged together with the sewage of other workshops in a centralized manner.
The existing device has large sewage production amount, no sewage is recycled, the using amount of circulating water is large, the sewage treatment amount is also large, the production cost of phthalic anhydride is increased, and the environmental protection is not facilitated.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a phthalic anhydride device sewage emission reduction system can reduce phthalic anhydride device sewage emission, can improve sewage quality to can the direct utilization again, makes the whole recycle of sewage of device, reaches the sewage zero release.
The phthalic anhydride device sewage emission reduction system of the utility model comprises an oxidation and condensation device, a washing device, a refining device, a condensate collecting tank, a sewage pool and a sewage treatment device;
a condensate drainage pipe of the oxidation and condensation device is connected with a condensate collecting tank, and the condensate collecting tank is connected with a raw water storage tank of a water vapor workshop through a condensate pump;
the high and low positions of a washing tower of the washing device are respectively connected with a high-position circulating pump, a middle-position circulating pump and a low-position circulating pump in a circulating manner, and a water outlet pipe of the high-position circulating pump is connected with machine seal self-flushing pipes of the high-position circulating pump, the middle-position circulating pump and the low-position circulating pump;
the drain pipes of the washing device and the refining device are connected with the rainwater draining pipe and the sewage pool water inlet pipe, and a lifting converter is arranged at the joint;
the sewage tank is connected with the washing device and the sewage treatment device through a sewage treatment pipe.
The machine seals of the high-position circulating pump, the middle-position circulating pump and the low-position circulating pump are single-end-face machine seals.
The interior of the sewage tank is divided into a primary sedimentation tank, a secondary sedimentation tank and a tertiary sedimentation tank by a primary overflow wall and a secondary overflow wall, wherein the primary sedimentation tank is connected with a water inlet pipe, and the tertiary sedimentation tank is connected with a sewage treatment pipe through a submerged pump; the height of the first-stage overflow wall is higher than that of the second-stage overflow wall; the sewage pool is provided with a sewage cleaning port and a liquid level meter.
The sewage treatment device comprises an adjusting tank, a primary sedimentation tank, a west water collecting tank, an anaerobic biochemical reaction tower, a middle water collecting tank, an east water collecting tank, an aerobic biochemical tank and a secondary sedimentation tank which are connected in sequence; the primary sedimentation tank and the secondary sedimentation tank are connected with the desliming tank through sludge return pipes; the secondary sedimentation tank is connected with a recycling water pipeline.
The oxidation and condensation device is connected with the water washing device through a gas phase pipeline and is connected with the refining device through a liquid phase pipeline.
Phthalic anhydride device sewage emission reduction system, the sewage discharge system to current phthalic anhydride device has carried out following transformation:
(1) increase a lime set collecting vessel and a lime set pump at oxidation condensing equipment to increase the pipeline that the lime set pump went to the former water storage tank in steam workshop, change the blowdown of equipment such as oxidation condensing equipment's oxygen-eliminating device, steam pocket into organized the emission by unorganized emission, collect in the lime set collecting vessel, squeeze into the former water storage tank in steam workshop through the lime set pump again, both with this part blowdown lime set recycle for the raw water of preparation desalinized water, again correspondingly reduced equivalent industry sewage.
(2) The circulating pump of the washing tower in the washing device is changed from double end faces to single end faces, the machine seal self-flushing pipe is additionally arranged, the characteristic that the circulating liquid concentration of the high-position circulating pump is low is utilized to replace circulating water cooling and flushing machine seals, the circulating water directly enters the outlet pipeline of the corresponding circulating pump after the flushing machine seals and is pumped into the washing tower to serve as washing water, after the improvement, a large amount of circulating water can be saved every day, and meanwhile, the equivalent industrial sewage is reduced.
(3) To device rain and sewage mixed drainage situation, reform transform device sewage disposal system, increase the rain calandria, and at the blow off pipe, the junction installation lift converter of rain calandria and effluent water sump inlet tube, operation through lift converter realizes blow off pipe and rain calandria or effluent water sump inlet tube intercommunication, at ordinary times with blow off pipe and effluent water sump inlet tube intercommunication, carry out recycle to device sewage, according to the environmental protection requirement, 20min after heavy rain and heavy snow weather, with blow off pipe and rain calandria intercommunication, directly cut into the rain calandria with the rainwater of device collection, the rain calandria directly lets in the row's of sea ditch, but greatly reduced device dirt yield.
(4) Reform transform the effluent water sump into the tertiary, sewage overflows to next stage after subsiding step by step, guarantee that tertiary sedimentation tank water quality is limpid, link to each other sewage treatment pipe and washing device simultaneously, and set up the filter before getting into washing device, seal the sparge water with device boiler water pump machine, the concentrated collection of sewage and the subsides back of production such as warm pump discharge water and device boiler water sampling point discharge water, direct as washing device make-up water use, excessive part is squeezed into sewage treatment plant and is handled the back and discharge, primary water has both been practiced thrift, again with the whole recycle or processing of device sewage, make the device reach the zero release of sewage.
Compared with the prior art, the utility model has the advantages of it is following:
the utility model discloses lead to and reform transform benzene anhydride device sewage discharge system, greatly reduced benzene anhydride device industry sewage production volume, the rethread is reformed transform the effluent water sump, has improved sewage quality of water, has satisfied washing system operation requirement, reaches the whole recycle of device sewage, has great economic benefits and social.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention.
FIG. 1 is a schematic flow diagram of a sewage discharge reduction system of a phthalic anhydride plant of the present invention;
FIG. 2 is a schematic view of the self-flushing device of the circulating pump of the water washing tower of the present invention;
FIG. 3 is a schematic structural view of a sewage tank of the present invention;
in the figure: 1. an oxidizing and condensing device; 2. a condensate drain pipe; 3. a condensate collection tank; 4. a condensate pump; 5. a raw water storage tank of a water vapor workshop; 6. a water washing device; 7. a refining device; 8. a blow-off pipe; 9. a lifting converter; 10. a rain drain pipe; 11. a water inlet pipe; 12. a sewage treatment pipe; 13. a sewage tank; 14. a regulating tank; 15. a primary sedimentation tank; 16. a west catch basin; 17. anaerobic biochemical reaction tower; 18. a middle water collecting tank; 19. an east water collecting tank; 20. an aerobic biochemical tank; 21. a desliming pool; 22. a sludge return pipe; 23. a secondary sedimentation tank; 24. a water recovery line; 25. washing the tower with water; 26. a low-level circulation pump; 27. a middle position circulating pump; 28. a high-level circulating pump; 29. mechanically sealing the self-flushing pipe; 30. cleaning a sewage port; 31. a liquid level meter; 32. a primary sedimentation tank; 33. a first level overflow wall; 34. a secondary sedimentation tank; 35. a secondary overflow wall; 36. a third-stage sedimentation tank; 37. a submerged pump.
Detailed Description
The present invention will be further described with reference to the following examples.
Example 1
As shown in fig. 1-3, the phthalic anhydride device sewage emission reduction system of the present invention comprises an oxidation and condensation device 1, a washing device 6, a refining device 7, a condensate collecting tank 3, a sewage tank 13 and a sewage treatment device;
a condensate discharge pipe 2 of the oxidation and condensation device 1 is connected with a condensate collecting tank 3, and the condensate collecting tank 3 is connected with a raw water storage tank 5 of a water vapor workshop through a condensate pump 4;
the high, medium and low positions of a water washing tower 25 of the water washing device 6 are respectively connected with a high-position circulating pump 28, a medium-position circulating pump 27 and a low-position circulating pump 26 in a circulating manner, wherein a water outlet pipe of the high-position circulating pump 28 is connected with machine seal self-flushing pipes 29 of the high-position circulating pump 28, the medium-position circulating pump 27 and the low-position circulating pump 26;
the sewage discharge pipe 8 of the water washing device 6 and the refining device 7 is connected with a rainwater discharge pipe 10 and a sewage pool 13 water inlet pipe 11, and a lifting converter 9 is arranged at the joint;
the sewage tank 13 is connected with the washing device 6 and the sewage treatment device through a sewage treatment pipe 12.
The machine seals of the high-position circulating pump 28, the middle-position circulating pump 27 and the low-position circulating pump 26 are single-end-face machine seals.
The interior of the wastewater tank 13 is divided into a primary sedimentation tank 32, a secondary sedimentation tank 34 and a tertiary sedimentation tank 36 by a primary overflow wall 33 and a secondary overflow wall 35, wherein the primary sedimentation tank 32 is connected to the water inlet pipe 11, and the tertiary sedimentation tank 36 is connected to the wastewater treatment pipe 12 by a submerged pump 37. The height of the first-stage overflow wall 33 is higher than that of the second-stage overflow wall 35. The sewage tank 13 is provided with a sewage cleaning port 30 and a liquid level meter 31.
The sewage treatment device comprises a regulating tank 14, a primary sedimentation tank 15, a west water collecting tank 16, an anaerobic biochemical reaction tower 17, a middle water collecting tank 18, an east water collecting tank 19, an aerobic biochemical tank 20 and a secondary sedimentation tank 23 which are connected in sequence; the primary sedimentation tank 15 and the secondary sedimentation tank 23 are connected with the desliming tank 21 through a sludge return pipe 22. The secondary sedimentation tank 23 is connected with a reclaimed water pipeline 24.
The oxidation and condensation device 1 is connected with a water washing device 6 through a gas phase pipeline and is connected with a refining device 7 through a liquid phase pipeline.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The utility model provides a phthalic anhydride device sewage emission reduction system which characterized in that: comprises an oxidation condensing device (1), a water washing device (6), a refining device (7), a condensate collecting tank (3), a sewage pool (13) and a sewage treatment device;
a condensate drainage pipe (2) of the oxidation and condensation device (1) is connected with a condensate collection tank (3), and the condensate collection tank (3) is connected with a raw water storage tank (5) of a water vapor workshop through a condensate pump (4);
the high, middle and low positions of a water washing tower (25) of the water washing device (6) are respectively connected with a high-position circulating pump (28), a middle-position circulating pump (27) and a low-position circulating pump (26) in a circulating manner, wherein a water outlet pipe of the high-position circulating pump (28) is connected with machine seal self-flushing pipes (29) of the high-position circulating pump (28), the middle-position circulating pump (27) and the low-position circulating pump (26);
a drain pipe (8) of the water washing device (6) and the refining device (7) is connected with a rain drain pipe (10) and a water inlet pipe (11) of a sewage pool (13), and a lifting converter (9) is arranged at the joint;
the sewage tank (13) is connected with the washing device (6) and the sewage treatment device through a sewage treatment pipe (12).
2. The phthalic anhydride device sewage emission reduction system of claim 1, wherein: the machine seals of the high-position circulating pump (28), the middle-position circulating pump (27) and the low-position circulating pump (26) are single-end-face machine seals.
3. The phthalic anhydride device sewage emission reduction system of claim 1, wherein: the interior of the sewage tank (13) is divided into a primary sedimentation tank (32), a secondary sedimentation tank (34) and a tertiary sedimentation tank (36) by a primary overflow wall (33) and a secondary overflow wall (35), wherein the primary sedimentation tank (32) is connected with the water inlet pipe (11), and the tertiary sedimentation tank (36) is connected with the sewage treatment pipe (12) through a submerged pump (37).
4. The phthalic anhydride device sewage emission reduction system of claim 3, wherein: the height of the first-stage overflow wall (33) is higher than that of the second-stage overflow wall (35).
5. The phthalic anhydride device sewage emission reduction system of claim 1 or 3, wherein: the sewage tank (13) is provided with a sewage cleaning port (30) and a liquid level meter (31).
6. The phthalic anhydride device sewage emission reduction system of claim 1, wherein: the sewage treatment device comprises an adjusting tank (14), a primary sedimentation tank (15), a west water collecting tank (16), an anaerobic biochemical reaction tower (17), a middle water collecting tank (18), an east water collecting tank (19), an aerobic biochemical tank (20) and a secondary sedimentation tank (23) which are connected in sequence; the primary sedimentation tank (15) and the secondary sedimentation tank (23) are connected with the desliming tank (21) through a sludge return pipe (22).
7. The phthalic anhydride device sewage emission reduction system of claim 6, wherein: the secondary sedimentation tank (23) is connected with a recycled water pipeline (24).
8. The phthalic anhydride device sewage emission reduction system of claim 1, wherein: the oxidation and condensation device (1) is connected with the water washing device (6) through a gas phase pipeline and is connected with the refining device (7) through a liquid phase pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921247782.3U CN210367352U (en) | 2019-08-02 | 2019-08-02 | Sewage emission reduction system of phthalic anhydride device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921247782.3U CN210367352U (en) | 2019-08-02 | 2019-08-02 | Sewage emission reduction system of phthalic anhydride device |
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| CN210367352U true CN210367352U (en) | 2020-04-21 |
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| CN201921247782.3U Active CN210367352U (en) | 2019-08-02 | 2019-08-02 | Sewage emission reduction system of phthalic anhydride device |
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