CN204973487U - Polyester technology tail gas organic matter recovery unit - Google Patents
Polyester technology tail gas organic matter recovery unit Download PDFInfo
- Publication number
- CN204973487U CN204973487U CN201520610900.8U CN201520610900U CN204973487U CN 204973487 U CN204973487 U CN 204973487U CN 201520610900 U CN201520610900 U CN 201520610900U CN 204973487 U CN204973487 U CN 204973487U
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- tail gas
- heat exchanger
- water
- organic matter
- shower water
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Abstract
The utility model discloses a polyester technology tail gas organic matter recovery unit, it includes that acetaldehyde retrieves strip tower, waste water delivery pump, heat exchanger no. 1, heat exchanger no. 2, tail gas spray column, pneumatic valve, tail gas fan, shower water pipeline and washing water pipeline, the export of waste water delivery pump connects a tee bend, accesss to the sewage station all the way, receives heat exchanger no. 2 all the way, receives heat exchanger no. 1 after the cooling water cooling, receives tail gas spray column top of the tower and carry out the tail gas washing after the refrigerated water is cooled down once more, is equipped with pneumatic valve control shower water flow between two heat exchangers, tail gas gets into at the bottom of the spray column, follows the top of the tower through the fan and takes out, and with the reverse contact mass transfer of shower water, washing water is followed the spray column bottom and is flowed, and through potential difference inflow wastewater collection groove, the heat medium stove is access to in the export of tail gas fan, burns unabsorbed organic matter. The device has improved the organic matter rate of recovery in the polyester technology tail gas to improve simultaneously acetaldehyde retrieve in the quality of acetaldehyde.
Description
Technical field
The utility model belongs to polyester chemical production field, relates to organic matter recovery technology, is specifically related to a kind of polyester process tail gas organic recovery device.
Background technology
Polyester (PET) is also called terylene or mylar, and main terephthalic acid (TPA) and the glycol reaction of adopting is produced at present.A large amount of process tail gas can be produced in polyester product production process, these tail gas mainly come from process tower air cooler fixed gas and the liquid rotary pump that is connected with batch condensation polymerization reactor exports tail gas, containing ethylene glycol, acetaldehyde, 2-methyl isophthalic acid in these tail gas, the organic matters such as 3-dioxolanes.
This part tail gas is passed into pipestill for heat carrier directly to burn process by more domestic enterprises, and the heat energy utilizing it to produce, do like this and not only waste resource, also there is larger potential safety hazard; Also there are some enterprises to be by this part tail gas first by the organic matter in a spray column washing absorption tail gas, then washings passed into together with esterification waste water the organic matters such as acetaldehyde recovery stripper recovery acetaldehyde.In existing technology, water for spray column washing produces water, but the organic method of above-mentioned spray column washing tail gas has the following disadvantages: on the one hand, the conveyance conduit producing water is carbon steel pipe, containing more ferric ion in water, this part water enters acetaldehyde recovery stripper through spray column, and ferric ion content in stripper-overhead acetaldehyde is increased, accelerate acetaldehyde polycondensation in Ethanal distillation column and generate para-acetaldehyde, thus have influence on the purity of acetaldehyde product; On the other hand, washings acidity is higher, accelerates 2-methyl isophthalic acid, 3-dioxolanes hydrolysis generating glycol and acetaldehyde, and ethylene glycol cannot reclaim in stripping tower, so not only adds the processing pressure of sewage plant, also reduces organic recovery total.
Utility model content
For the defect of above-mentioned prior art, the purpose of this utility model is to provide a kind of polyester process tail gas organic recovery 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 above-mentioned utility model object, the utility model takes a kind of device improving the organic matter rate of recovery in polyester process tail gas, and it comprises 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; The outlet of waste water delivery pump connects a threeway, a-road-through receives heat exchanger two to sewage plant, a road, after cooling water temperature, receive heat exchanger one, after chilled water is lowered the temperature again, receive tail gas spray tower tower top carry out washing tail gas, pneumatic operated valve is housed between two heat exchangers and controls shower water flow; Tail gas enters at the bottom of spray column, is extracted out from tower top by blower fan, contact mass transfer reverse with shower water, and washings flow out bottom spray column, flow into waste water collection tank by potential difference, and hot Media Oven is led in exhaust fan outlet, is incinerated by unabsorbed organic matter.
As preferably, the shower water of described heat exchanger two is imported and exported and is connect a cross-over connection, and import department connects a road demineralized water.When the reasons such as heat exchanger two cleaning can not use, heat exchanger two shower water that comes into operation imports and exports cross-over connection, maintains and normally produces; When waste water delivery pump go wrong can not normally run time, shower water is switched to demineralized water, maintain produce normally carry out.
Preferably another, described 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 this device, not only reduce ferric ion content and acidity in washings, improve the organic matter rate of recovery and acetaldehyde quality in process tail gas, what also reduce polyester product uses water unit consumption, has good economic benefit; In addition when the reasons such as heat exchanger two cleaning can not use, heat exchanger two shower water that comes into operation imports and exports cross-over connection, maintains and normally produces; When waste water delivery pump go wrong can not normally run time, shower water is switched to demineralized water, maintain produce normally carry out.
Accompanying drawing illustrates:
Fig. 1 is the structural representation of the utility model embodiment.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is further described:
As shown in Figure 1, the present embodiment describes a kind of device improving the organic matter rate of recovery in polyester process tail gas, and it comprises 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 2, shower water conveyance conduit 11 and washings conveyance conduit 10; The outlet of waste water delivery pump connects a threeway, a-road-through receives heat exchanger two to sewage plant, a road, after cooling water temperature, receive heat exchanger one, after chilled water is lowered the temperature again, receive tail gas spray tower tower top carry out washing tail gas, pneumatic operated valve is housed between two heat exchangers and controls shower water flow; Tail gas enters at the bottom of spray column, is extracted out from tower top by blower fan, contact mass transfer reverse with shower water, and washings flow out bottom spray column, flow into waste water collection tank by potential difference, and hot Media Oven is led in exhaust fan outlet, is incinerated by unabsorbed organic matter.The shower water of described heat exchanger two is imported and exported and is connect a cross-over connection 6, and import department connects a road demineralized water 10.When the reasons such as heat exchanger two cleaning can not use, heat exchanger two shower water that comes into operation imports and exports cross-over connection, maintains and normally produces; When waste water delivery pump go wrong can not normally run time, shower water is switched to demineralized water, maintain produce normally carry out.Described 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 reduce ferric ion content and acidity in washings, improve the organic matter rate of recovery and acetaldehyde quality in process tail gas, what also reduce polyester product uses water unit consumption, has good economic benefit; In addition when the reasons such as heat exchanger two cleaning can not use, heat exchanger two shower water that comes into operation imports and exports cross-over connection, maintains and normally produces; When waste water delivery pump go wrong can not normally run time, shower water is switched to demineralized water, maintain produce normally carry out.
Above-described embodiment is one of the present utility model preferably scheme, not does any pro forma restriction to the utility model, also has other variant and remodeling under the prerequisite not exceeding the technical scheme described in claim.
Claims (3)
1. a polyester process tail gas organic recovery device, it is characterized in that, it comprises 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; The outlet of waste water delivery pump connects a threeway, a-road-through receives heat exchanger two to sewage plant, a road, after cooling water temperature, receive heat exchanger one, after chilled water is lowered the temperature again, receive tail gas spray tower tower top carry out washing tail gas, pneumatic operated valve is housed between two heat exchangers and controls shower water flow; Tail gas enters at the bottom of spray column, is extracted out from tower top by blower fan, contact mass transfer reverse with shower water, and washings flow out bottom spray column, flow into waste water collection tank by potential difference, and hot Media Oven is led in exhaust fan outlet, is incinerated by unabsorbed organic matter.
2. a kind of polyester process tail gas organic recovery device according to claim 1, is characterized in that, described heat exchanger 2 shower water is imported and exported and connect a cross-over connection, and import department connects a road demineralized water.
3. a kind of polyester process tail gas organic recovery device according to claim 1, is characterized in that, described shower water conveyance conduit and washings conveyance conduit material are stainless steel tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520610900.8U CN204973487U (en) | 2015-08-14 | 2015-08-14 | Polyester technology tail gas organic matter recovery unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520610900.8U CN204973487U (en) | 2015-08-14 | 2015-08-14 | Polyester technology tail gas organic matter recovery unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204973487U true CN204973487U (en) | 2016-01-20 |
Family
ID=55107907
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520610900.8U Withdrawn - After Issue CN204973487U (en) | 2015-08-14 | 2015-08-14 | Polyester technology tail gas organic matter recovery unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204973487U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105126547A (en) * | 2015-08-14 | 2015-12-09 | 桐昆集团股份有限公司 | Polyester process exhaust organic matter recovery device |
-
2015
- 2015-08-14 CN CN201520610900.8U patent/CN204973487U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105126547A (en) * | 2015-08-14 | 2015-12-09 | 桐昆集团股份有限公司 | Polyester process exhaust organic matter recovery device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160120 Effective date of abandoning: 20170609 |