CN201746348U - Device for reducing COD value of polyester waste water of stripping tower - Google Patents
Device for reducing COD value of polyester waste water of stripping tower Download PDFInfo
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- CN201746348U CN201746348U CN2010202571067U CN201020257106U CN201746348U CN 201746348 U CN201746348 U CN 201746348U CN 2010202571067 U CN2010202571067 U CN 2010202571067U CN 201020257106 U CN201020257106 U CN 201020257106U CN 201746348 U CN201746348 U CN 201746348U
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- waste water
- stripping tower
- heat exchanger
- outlet
- chemical pump
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Abstract
The utility model relates to a device for reducing COD value of polyester waste water of a stripping tower, which is characterized by comprising a waste water collecting tank (1), a first chemical pump (2), a heat exchanger (3), a second chemical pump (4), the stripping tower (5) and a heat medium furnace (6); an outlet of the waste water collecting tank (1) is connected with an inlet of the first chemical pump (2), an outlet of the first chemical pump (2) is connected with an inlet of the heat exchanger (3), an outlet of the heat exchanger (3) is connected with an inlet at the top end of the stripping tower (5), an outlet at the bottom end of the stripping tower (5) is connected with an inlet of the second chemical pump (4), an outlet of the second chemical pump (4) is connected with a heat exchange medium inlet of the heat exchanger (3) or is directly connected with a sewage treatment station, and a heat exchange medium outlet of the heat exchanger (3) is connected with a sewage treatment station; and a gas outlet at the top end of the stripping tower (5) is connected with the heat medium furnace (6). The utility model can reduce COD content of polyester waste water produced in the production process for chemical fiber enterprises of polyesters, lower the sewage disposal cost and protect the environment.
Description
(1) technical field
The utility model relates to a kind of decreasing COD (Chemical Oxygen Demand) value in polyester waste water of stripping tower device, is mainly used in to reduce the polyester waste water COD content that produces in the polyester chemical fiber factory production process.Belong to technical field of chemical.
(2) background technology
In chemical enterprise, the polyester waste water COD content that produces in the polyester chemical fiber factory production process is higher (to be 25000～30000mg/L), concentration has substantially exceeded the reception concentration of sewage disposal anaerobic pond, for making concentration reach the acceptance criteria of anaerobic pond, domestic manufacturer adopts dilution method (water of productive use that working concentration is lower mixes with polyester waste water) mostly, (is 3000～4000mg/L) with its reception concentration that is diluted to anaerobic pond.Dilution method can increase the treatment capacity of anaerobic pond greatly, usually increase to 12～15 times of former polyester waste water treatment capacity, this has greatly increased the anaerobic pond processing cost and has reduced treatment effect, causes the COD content overproof of many polyester chemical fiber factory externally discharged waste waters, and environment is caused severe contamination.
(3) summary of the invention
The purpose of this utility model is to overcome above-mentioned deficiency, and a kind of polyester waste water COD content that produces in the polyester chemical fiber factory production process, decreasing COD (Chemical Oxygen Demand) value in polyester waste water of stripping tower device that reduces cost of sewage disposal, protection environment of reducing is provided.
The purpose of this utility model is achieved in that a kind of decreasing COD (Chemical Oxygen Demand) value in polyester waste water of stripping tower device, it is characterized in that: it comprises waste water collection tank, first chemical pump, heat exchanger, second chemical pump, stripping tower and heating agent stove;
Described waste water collection tank outlet links to each other with the first chemical pump import, described first chemical pump outlet links to each other with heat exchanger inlets, described heat exchanger outlet links to each other with the import of stripping tower top, the outlet of described stripping tower bottom links to each other with the second chemical pump import, described second chemical pump outlet links to each other or directly links to each other with sewage works with the import of described heat exchanger heat transferring medium, and described heat exchanger heat transferring medium outlet links to each other with sewage works; Described stripping tower top pneumatic outlet is connected with the heating agent stove.
Also be connected with nitrogen pipeline on the inlet ductwork of described heating agent stove.
Also be connected with water-cooled tube on the described heat exchanger heat transferring medium inlet ductwork; Described heat exchanger heat transferring medium export pipeline is connected with cooling water circulation pipeline.
Compared with prior art, the beneficial effects of the utility model are:
1) polyester waste water COD content descends significantly: adopt heating mode during heat exchange, former polyester waste water COD content 25000-30000mg/L drops to 3000-5000mg/L; Adopt cooling method, former polyester waste water COD content 25000-30000mg/L drops to 1500-3000mg/L;
When 2) heating mode was adopted in heat exchange, the polyester waste water that polyester waste water that the temperature after utilization is handled is high and untreated temperature are low carried out heat exchange, and that realizes heat energy makes full use of save energy;
3) organism that extracts in the polyester waste water feeds the consumption that heating agent stove internal combustion can not cause secondary pollution to environment and can be used as saving of fuel part coal or heavy oil;
4) this technology is directly extracted the organism in the polyester waste water, makes total amount of organic minimizing in the waste water, does not have any annexation and produces;
5) the sewage disposal device floor space is little, less investment.
(4) description of drawings
Fig. 1 is the structural representation of the utility model decreasing COD (Chemical Oxygen Demand) value in polyester waste water of stripping tower device.
Wherein:
Waste water collection tank 1, first chemical pump 2, heat exchanger 3, second chemical pump 4, stripping tower 5, heating agent stove 6.
(5) embodiment
Referring to Fig. 1, a kind of decreasing COD (Chemical Oxygen Demand) value in polyester waste water of stripping tower device that the utility model relates to mainly is made up of waste water collection tank 1, first chemical pump 2, heat exchanger 3, second chemical pump 4, stripping tower 5 and heating agent stove 6.
Described waste water collection tank 1 outlet links to each other with 2 imports of first chemical pump, 2 outlets of described first chemical pump link to each other with heat exchanger 3 imports, described heat exchanger 3 outlets link to each other with stripping tower 5 top imports, the outlet of described stripping tower 5 bottoms links to each other with 4 imports of second chemical pump, 4 outlets of described second chemical pump link to each other or directly link to each other with sewage works with described heat exchanger 3 heat transferring medium imports, and described heat exchanger 3 heat transferring mediums outlet links to each other with sewage works;
Described stripping tower 5 top pneumatic outlets are connected with 6 imports of heating agent stove.
Also be connected with nitrogen pipeline on the inlet ductwork of described heating agent stove 6.
Also be connected with water-cooled tube on the described heat exchanger 3 heat transferring medium inlet ductwork; Described heat exchanger 3 heat transferring medium export pipelines are connected with cooling water circulation pipeline.
Main flow process comprises four parts during the work of the utility model device, is specially:
1) polyester waste water (temperature is 30 ℃～50 ℃) admission stripper flow process
First chemical pump 2 is installed at 1 polyester waste water outlet conduit place in waste water collection tank, by first chemical pump 2 polyester waste water is transported to and carries out thermal exchange in the heat exchanger 3, after impelling polyester waste water in heat exchanger 3, to carry out heat exchange, can adopt heating mode or cooling method when carrying out heat exchange; During intensification, temperature rises to 80 ℃-95 ℃, and temperature is reduced to 15-30 ℃ and enters stripping tower during cooling; First chemical pump 2 is by pneumatic adjusting valve or Frequency Converter Control, to reach the control to polyester waste water admission stripper flow.
2) handle back polyester waste water (the about 95-110 of temperature ℃) and go out the stripping tower flow process
Second chemical pump 4 is installed at 5 outlet conduit places at stripping tower,
IfReduce to 3000-5000mg/L according to processing requirement COD value, the polyester waste water that then makes after treatment temperature be about 95-110 ℃ is delivered in the heat exchanger 3, effect by heat exchanger 3, untreated polyester waste water (temperature is 30 ℃～50 ℃) temperature is improved, be transported in the stripping tower again and handle; Simultaneously, the thermal exchange effect of the polyester waste water of having handled by heat exchanger reduces temperature, is disposed to sewage works at last, handles, and discharges after reaching national pipe network emission standard.
If according to processing requirement, the COD value is reduced to below the 1500-3000mg/L, and then polyester waste water after treatment directly is delivered to sewage works after by naturally cooling, handles, and discharges after reaching discharging standards.
3) tail gas emptying and firing system
It is the organism that discharges in the polyester waste water that extracts with burning stripping tower 5 that tail gas emptying and firing system mainly act on.
In the polyester waste water treating processes, because of it has incendivity,, save the consumption of coal in the heating agent stove 6 or heavy oil so tail gas is transported to burning in the heating agent stove 6 from the tail gas of stripping tower 5 tower top discharges (organism the polyester waste water that stripping tower extracts).
Feed the nitrogen of 0.3-0.4Mpa when tail gas is delivered to heating agent stove 6, the protection gas in the time of can preventing when tail gas from refluxing as burning guarantees the incendiary security.
When this stripping system or heating agent stove break down, be security consideration, out of service after the direct emptying of organism that stripping tower extracts.
4) steam flow
Steam is divided into two portions and flows to stripping tower, and a part flows to the heating coil of cat head, and another part flows at the bottom of the tower, and bottom steam meets with the polyester waste water adverse current under overhead streams, carries out mass transfer in packing layer, thereby removes the volatile matter in the waste water; Cat head heating coil steam is to heat once more for organism that stripping tower extracts, is easy to discharge stripping tower, prevents that condensation from flowing backwards, and reduces the extraction effect of stripping tower.
To the water vapor of stripping tower 5 input pressures at 0.3-0.6Mpa.
Polyester waste water after the processing flows out through stripping tower 3 bottoms.
Its ultimate principle is:
It has utilized the vapor-liquid equilibrium principle, volatile contaminant in the polyester waste water (being mainly mutual solubility aldehydes, alkanes material), concentration in gas phase is greater than this characteristic of the concentration in liquid phase, by the steam direct heating, make it under boiling point, be enriched in gas phase by a certain percentage, separate some pollutent purposes in the waste water thereby reach.
Claims (3)
1. decreasing COD (Chemical Oxygen Demand) value in polyester waste water of stripping tower device, it is characterized in that: it comprises waste water collection tank (1), first chemical pump (2), heat exchanger (3), second chemical pump (4), stripping tower (5) and heating agent stove (6);
Described waste water collection tank (1) outlet links to each other with first chemical pump (2) import, described first chemical pump (2) outlet links to each other with heat exchanger (3) import, described heat exchanger (3) outlet links to each other with stripping tower (5) top import, the outlet of described stripping tower (5) bottom links to each other with second chemical pump (4) import, described second chemical pump (4) outlet links to each other or directly links to each other with sewage works with described heat exchanger (3) heat transferring medium import, and the outlet of described heat exchanger (3) heat transferring medium links to each other with sewage works; Described stripping tower (5) top pneumatic outlet is connected with heating agent stove (6).
2. a kind of decreasing COD (Chemical Oxygen Demand) value in polyester waste water of stripping tower device according to claim 1 is characterized in that: also be connected with nitrogen pipeline on the inlet ductwork of described heating agent stove (6).
3. a kind of decreasing COD (Chemical Oxygen Demand) value in polyester waste water of stripping tower device according to claim 1 and 2 is characterized in that: also be connected with water-cooled tube on described heat exchanger (3) the heat transferring medium inlet ductwork; Described heat exchanger (3) heat transferring medium export pipeline is connected with cooling water circulation pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202571067U CN201746348U (en) | 2010-07-12 | 2010-07-12 | Device for reducing COD value of polyester waste water of stripping tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202571067U CN201746348U (en) | 2010-07-12 | 2010-07-12 | Device for reducing COD value of polyester waste water of stripping tower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201746348U true CN201746348U (en) | 2011-02-16 |
Family
ID=43581026
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202571067U Expired - Lifetime CN201746348U (en) | 2010-07-12 | 2010-07-12 | Device for reducing COD value of polyester waste water of stripping tower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201746348U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102583606A (en) * | 2012-02-16 | 2012-07-18 | 张家港欣阳化纤有限公司 | Polyester process wastewater stripping separation treatment device |
-
2010
- 2010-07-12 CN CN2010202571067U patent/CN201746348U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102583606A (en) * | 2012-02-16 | 2012-07-18 | 张家港欣阳化纤有限公司 | Polyester process wastewater stripping separation treatment device |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110216 |
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| CX01 | Expiry of patent term |