CN105126547B - A kind of polyester process tail gas organic recovery device - Google Patents
A kind of polyester process tail gas organic recovery device Download PDFInfo
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- CN105126547B CN105126547B CN201510497631.3A CN201510497631A CN105126547B CN 105126547 B CN105126547 B CN 105126547B CN 201510497631 A CN201510497631 A CN 201510497631A CN 105126547 B CN105126547 B CN 105126547B
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- tail gas
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- heat exchanger
- spray
- waste water
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- Treating Waste Gases (AREA)
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Abstract
The invention discloses a kind of polyester process tail gas organic recovery device, it includes acetaldehyde recovery stripper, waste water delivery pump, heat exchanger one, heat exchanger two, tail gas spray tower, pneumatic operated valve, exhaust fan, shower water conveyance conduit and washings conveyance conduit；Waste water conveying pump discharge connects a threeway, lead to sewage plant all the way, be connected to heat exchanger two all the way, heat exchanger one is followed by through cooling water temperature, chilled water is lowered the temperature be followed by tail gas spray tower tower top carrying out controlling shower water flow equipped with pneumatic operated valve between washing tail gas, two heat exchangers again；Tail gas enters from spray column bottom, is extracted out from tower top by blower fan, and with the reverse contact mass transfer of shower water, washings flow into waste water collection tank from spray tower bottom outflow by potential difference, and exhaust fan outlet is led to hot Media Oven, unabsorbed organic matter is incinerated.The arrangement increases the organic matter rate of recovery in polyester process tail gas, and the quality of acetaldehyde in acetaldehyde recovery is improved simultaneously.
Description
Technical field
The invention belongs to polyester chemical production field, it is related to organic matter recovery technology, and in particular to a kind of polyester process tail
Gas organic recovery device.
Background technology
Polyester (PET) is also called terylene or polyester resin, main at present to be produced using terephthalic acid (TPA) and glycol reaction.
Substantial amounts of process tail gas can be produced in polyester product production process, these tail gas mostly come from process tower air cooler fixed gas
And the pendular ring pump discharge tail gas being connected with batch condensation polymerization reactor, ethylene glycol, acetaldehyde, 2- methyl isophthalic acids, 3- dioxies are contained in these tail gas
The organic matters such as penta ring.
Domestic some enterprises are that this partial tail gas is passed through into pipestill for heat carrier directly burning treatment, and using the heat energy of its generation,
Do so not only wastes resource, there is also larger potential safety hazard；Also it is that this partial tail gas is first passed through into one to have some enterprises
Organic matter in individual spray column washing absorption tail gas, then washings are passed through the recovery of acetaldehyde recovery stripper together with esterification waste water
The organic matters such as acetaldehyde.In existing technology, the water for spray column washing is production water, but above-mentioned washs tail with spray column
The method of gas organic matter has the following disadvantages：On the one hand, the conveyance conduit of production water is carbon steel pipe, and more trivalent is contained in water
Iron ion, this part water enters acetaldehyde recovery stripper through spray column, and ferric ion content increases in making stripper-overhead acetaldehyde
Plus, accelerate acetaldehyde polycondensation generation para-acetaldehyde in Ethanal distillation column, so as to have influence on the purity of acetaldehyde product；On the other hand, wash
Wash water acid higher, accelerate 2- methyl isophthalic acids, 3- dioxolanes hydrolysis generation ethylene glycol and acetaldehyde, and ethylene glycol is in stripping tower
Cannot reclaim, so not only increased the processing pressure of sewage plant, also reduce the recovery total of organic matter.
The content of the invention
For the defect of above-mentioned prior art, reclaimed it is an object of the invention to provide a kind of polyester process tail gas organic matter
Device, the arrangement increases the organic matter rate of recovery in polyester process tail gas, and improves the quality of acetaldehyde in acetaldehyde recovery simultaneously.
In order to realize foregoing invention purpose, the present invention takes a kind of dress for improving the organic matter rate of recovery in polyester process tail gas
Put, it includes acetaldehyde recovery stripper, waste water delivery pump, heat exchanger one, heat exchanger two, tail gas spray tower, pneumatic operated valve, tail gas wind
Machine, shower water conveyance conduit and washings conveyance conduit；Waste water conveying pump discharge connects a threeway, and sewage plant, one are led to all the way
Road is connected to heat exchanger two, and heat exchanger one is followed by through cooling water temperature, and chilled water is lowered the temperature be followed by tail gas spray tower tower again
Between jacking end of line gas washing, two heat exchangers shower water flow is controlled equipped with pneumatic operated valve；Tail gas enters from spray column bottom, by wind
Machine is extracted out from tower top, and with the reverse contact mass transfer of shower water, washings flow into wastewater collection from spray tower bottom outflow by potential difference
Hot Media Oven is led in groove, exhaust fan outlet, and unabsorbed organic matter is incinerated.
Preferably, the spray water entrance of the heat exchanger two connects a bridging, demineralized water all the way is connect at import.When changing
When the reasons such as the cleaning of hot device two can not be used, the heat exchanger two that comes into operation spray water entrance bridging maintains normal production；When waste water is defeated
Send pump to go wrong when being not normally functioning, shower water is switched to demineralized water, maintain production to be normally carried out.
Another preferred, the shower water conveyance conduit and washings conveyance conduit material are stainless steel tube.
Stripping tower bottom waste water is led to tail gas spray tower spray washing process tail gas by the device, in not only reducing washings
Ferric ion content and acidity, improve the organic matter rate of recovery and acetaldehyde quality in process tail gas, also reduce polyester product
Use water unit consumption, with preferable economic benefit；In addition when the reasons such as the cleaning of heat exchanger two can not be used, come into operation heat exchanger two
Spray water entrance bridging, maintains normal production；When waste water delivery pump goes wrong to be not normally functioning, shower water is switched
To demineralized water, production is maintained to be normally carried out.
Brief description of the drawings：
Fig. 1 is the structural representation of the embodiment of the present invention.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings：
As shown in figure 1, the present embodiment describes a kind of device for improving the organic matter rate of recovery in polyester process tail gas, it includes
Acetaldehyde recovery stripper 5, waste water delivery pump 4, heat exchanger 1, heat exchanger 23, tail gas spray tower 1, pneumatic operated valve 7, exhaust fan
2nd, shower water conveyance conduit 11 and washings conveyance conduit 10；Waste water conveying pump discharge connect a threeway, lead to all the way sewage plant,
Heat exchanger two being connected to all the way, heat exchanger one being followed by through cooling water temperature, chilled water is lowered the temperature be followed by tail gas spray tower again
Tower top carries out controlling shower water flow equipped with pneumatic operated valve between washing tail gas, two heat exchangers；Tail gas enters from spray column bottom, passes through
Blower fan is extracted out from tower top, and with the reverse contact mass transfer of shower water, washings flow into waste water and receive from spray tower bottom outflow, by potential difference
Hot Media Oven is led in collection groove, exhaust fan outlet, and unabsorbed organic matter is incinerated.The spray water entrance of the heat exchanger two
A bridging 6 is connect, demineralized water 10 all the way are connect at import.When the reasons such as the cleaning of heat exchanger two can not be used, come into operation heat exchanger two
Spray water entrance bridging, maintains normal production；When waste water delivery pump goes wrong to be not normally functioning, shower water is switched
To demineralized water, production is maintained to be normally carried out.The shower water conveyance conduit and washings conveyance conduit material are stainless steel tube.
Stripping tower bottom waste water is led to tail gas spray tower spray washing process tail gas by said apparatus, not only reduces washings
Middle ferric ion content and acidity, improve the organic matter rate of recovery and acetaldehyde quality in process tail gas, also reduce polyester product
Product use water unit consumption, with preferable economic benefit；In addition when the reasons such as the cleaning of heat exchanger two can not be used, come into operation heat exchanger
Two spray water entrance bridgings, maintain normal production；When waste water delivery pump goes wrong to be not normally functioning, shower water is cut
Demineralized water is changed to, maintains production to be normally carried out.
Embodiment described above is a kind of preferably scheme of the invention, not makees any formal to the present invention
Limitation, also has other variants and remodeling on the premise of without departing from the technical scheme described in claim.
Claims (3)
1. a kind of polyester process tail gas organic recovery device, it is characterised in that it includes that acetaldehyde recovery stripper, waste water are conveyed
Pump, heat exchanger one, heat exchanger two, tail gas spray tower, pneumatic operated valve, exhaust fan, shower water conveyance conduit and washings delivery pipe
Road；The wastewater outlet of acetaldehyde recovery stripper is connected with waste water delivery pump, and waste water conveying pump discharge connects a threeway, leads to all the way
Sewage plant, heat exchanger two being connected to all the way, heat exchanger one being followed by through cooling water temperature, chilled water is lowered the temperature be followed by tail gas again
Spray column overhead carries out controlling shower water flow equipped with pneumatic operated valve between washing tail gas, two heat exchangers；Tail gas enters from spray column bottom
Enter, extracted out from tower top by blower fan, with the reverse contact mass transfer of shower water, washings flow out from spray tower bottom, by potential difference stream
Enter waste water collection tank, exhaust fan outlet is led to hot Media Oven, unabsorbed organic matter is incinerated.
2. a kind of polyester process tail gas organic recovery device according to claim 1, it is characterised in that described heat exchange
The spray water entrance of device two connects a bridging, and demineralized water all the way is connect at import.
3. a kind of polyester process tail gas organic recovery device according to claim 1, it is characterised in that described spray
Water conveyance conduit and washings conveyance conduit material are stainless steel tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510497631.3A CN105126547B (en) | 2015-08-14 | 2015-08-14 | A kind of polyester process tail gas organic recovery device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510497631.3A CN105126547B (en) | 2015-08-14 | 2015-08-14 | A kind of polyester process tail gas organic recovery device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105126547A CN105126547A (en) | 2015-12-09 |
| CN105126547B true CN105126547B (en) | 2017-06-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510497631.3A Active CN105126547B (en) | 2015-08-14 | 2015-08-14 | A kind of polyester process tail gas organic recovery device |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106693618B (en) * | 2016-12-12 | 2019-05-17 | 余建华 | The harmless processing system of process tail gas and exhaust gas during a kind of coal tar deep processing |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54118493A (en) * | 1978-03-08 | 1979-09-13 | Mitsubishi Chem Ind Ltd | Production of polyester |
| JP3799311B2 (en) * | 2002-09-02 | 2006-07-19 | 帝人化成株式会社 | Organic solvent recovery method |
| CN100558445C (en) * | 2006-09-15 | 2009-11-11 | 中国石油化工股份有限公司 | The purification method of organic exhaust gas |
| JP2010132828A (en) * | 2008-12-08 | 2010-06-17 | Hitachi Plant Technologies Ltd | Apparatus and method for synthesizing polyester |
| CN103012090B (en) * | 2011-09-20 | 2015-02-11 | 上海聚友化工有限公司 | Method for recovering organic matters in polyester wastewater |
| CN202538607U (en) * | 2012-03-23 | 2012-11-21 | 厦门泓信特种纤维有限公司 | Polyester tail gas treatment device |
| CN202630077U (en) * | 2012-05-24 | 2012-12-26 | 浙江华鑫化纤有限公司 | System for collecting and incinerating waste gas in production of polyester |
| CN204973487U (en) * | 2015-08-14 | 2016-01-20 | 桐昆集团股份有限公司 | Polyester technology tail gas organic matter recovery unit |
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Effective date of registration: 20211018 Address after: 223700 No. 88, Changjiang South Road, economic development zone, Siyang County, Suqian City, Jiangsu Province Patentee after: Jiangsu Tongkun Hengxin New Material Co.,Ltd. Address before: 314513 No. 188 Jinji Road, Zhouquan Town, Tongxiang City, Jiaxing City, Zhejiang Province Patentee before: TONGKUN GROUP Co.,Ltd. |
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