CN202191720U - Recovery device for tail gas of oxirane for polyether polyol - Google Patents
Recovery device for tail gas of oxirane for polyether polyol Download PDFInfo
- Publication number
- CN202191720U CN202191720U CN2011203386301U CN201120338630U CN202191720U CN 202191720 U CN202191720 U CN 202191720U CN 2011203386301 U CN2011203386301 U CN 2011203386301U CN 201120338630 U CN201120338630 U CN 201120338630U CN 202191720 U CN202191720 U CN 202191720U
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- China
- Prior art keywords
- tail gas
- oxirane
- condenser
- retracting device
- collecting tank
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Abstract
The utility model discloses a recovery device for tail gas of oxirane for polyether polyol, which is particularly applicable to a storage tank for oxirane, a raw material of the polyether polyol. The recovery device comprises a condenser, a collection tank and a tail gas absorber, wherein the condenser is connected with a tail gas outlet of the storage tank for the oxirane; the outlet of the condenser is connected with the collection tank; and a gas outlet at the upper part of the collection tank is connected with the tail gas absorber. After being cooled by the condenser, the tail gas of the oxirane flows back into the collection tank, and is fed into the storage tank for the oxirane by a reflux pump at the bottom of the collection tank; and noncondensable gas is absorbed by the tail gas absorber and then directly discharged. The device can recover the tail gas in the storage process of the oxirane, greatly reduces the loss of the oxirane in the storage process and improves the safety in the storage process. The device is simple in structure and has practical application value in the production process.
Description
Technical field
The utility model relates to a cover chemical industry equipment, is specifically related to a kind of retracting device of polyether polyol reaction dissolvent oxirane tail gas, and this equipment is particularly useful for the recovery of oxirane storage tank tail gas.
Background technology
Use reaction dissolvent oxirane during polyether polyol is produced, the boiling point of oxirane is 10.4 ℃, and flash-point belongs to A-grade in the first class's class hazardous chemical less than-17.8 ℃, and it stores high requirement.The storing mode that present most at home producer uses stores as the pressure pot type; The drawback of the maximum of this storage is that storage process can discharge a large amount of tail gas; The tail gas that volatilizes has not only increased the proportion of goods damageds of the raw material that stores, and also increases simultaneously the danger coefficient of storage process greatly.External storing mode has adopted the storing mode of freezing type at present; Reduced the loss in the storage process; But the problem that the freezing type storage exists tail gas to absorb too, the utility model just is being based on above defective, and the oxirane storage device is improved; Guarantee that the loss of storing minimizes, and guarantee the security performance of storage.
Summary of the invention
The purpose of the utility model is to provide a kind of retracting device of polyether polyol reaction dissolvent oxirane tail gas; This device can reclaim the tail gas in the oxirane storage process; Greatly reduce the loss of the oxirane in the storage process, improve the security in the storage process.
The utility model is realized through following technical scheme:
A kind of retracting device of polyether polyol reaction dissolvent oxirane tail gas; It is characterized in that: described retracting device comprises condenser, collecting tank and tail gas absorber; Condenser is connected with the outlet of oxirane storage tank tail gas; Condensator outlet connects collecting tank, and the outlet of collecting tank upper gas connects tail gas absorber.
Chilled brine below the described condenser outer circulation-10 ℃.
Described retracting device also comprises the pipeline that is connected between collecting tank and the oxirane storage tank, and pipeline is provided with the recovery pump.Reclaim pump and use explosion-proof pump.
The condensed oxirane solvent of described collecting tank collecting ring oxidative ethane tail gas; Tail gas absorber adopts the water absorption tower usually, is used for absorbing the fixed gas in the oxirane tail gas.The height of tail gas absorber must be higher than 15 meters, so that exhaust emissions reaches environmental protection standard.
Utilize the retracting device of the utility model, its oxirane tail gas recycle process is following:
1) opens-10 ℃ of chilled waters of condenser, cool off through the condenser outer circulation.
2) open breather valve and the safety valve bottom valve that connecting ring oxidative ethane storage tank tail gas exports, oxirane storage tank tail gas is through condenser condenses.
3) the tail gas condensate liquid gets into collecting tank, and interior circulation insulation is opened.
4) when the collecting tank liquid level reaches 80%, open the recovery pump, directly pump into the oxirane storage tank.
5) fixed gas directly discharges in the atmosphere after tail gas absorber water absorbs.
The retracting device of the polyether polyol reaction dissolvent oxirane tail gas of the utility model carries out condensation to oxirane tail gas and handles with absorbing, and with being reclaimed by collecting tank after the condensation of oxirane tail gas, fixed gas absorbs the back discharging by the absorption tower.This device can reclaim the tail gas in the oxirane storage process, greatly reduces the loss of the oxirane in the storage process, improves the security in the storage process simultaneously.The utility model apparatus structure is simple, has the value of practical application aborning.
Below in conjunction with accompanying drawing the utility model is described in detail.The protection domain of the utility model does not exceed with the specific embodiment, but is limited claim.
Description of drawings
The structural representation of the oxirane device for recovering tail gas of Fig. 1 the utility model.
Wherein: 1, oxirane storage tank, 2, condenser, 3, collecting tank, 4, tail gas absorber, 5, reclaim pump.
The specific embodiment
Referring to shown in Figure 1, a kind of retracting device of polyether polyol reaction dissolvent oxirane tail gas comprises condenser 2, collecting tank 3, tail gas absorber 4 and reclaims pump 5.
The condenser 2 of said device is connected with the tail gas outlet of oxirane storage tank 1, and condenser 2 outer circulations-10 ℃ chilled water cools off oxirane tail gas.
Condenser 2 outlets connect collecting tank 3, and the outlet of collecting tank 3 upper gas connects tail gas absorber 4.After the condensation of oxirane tail gas, wherein the oxirane solvent gets in the collecting tank 3, and fixed gas gets into tail gas absorber 4 by the outlet of collecting tank 3 upper gas.Tail gas absorber is the water absorption tower, highly is higher than 15 meters, makes exhaust emissions reach environmental protection standard.
Between collecting tank 3 and oxirane storage tank 1, be connected by pipeline, pipeline is provided with and reclaims pump 5.Reclaim pump 5 and use explosion-proof pump.When collecting tank 3 liquid levels reach 80%, the oxirane that reclaims is directly pumped in the oxirane storage tank 1 by reclaiming pump 5.
Utilize the above-mentioned retracting device of the utility model, its oxirane tail gas recycle process is following:
1) opens-10 ℃ of chilled waters of condenser 2, cool off through condenser 2 outer circulations.
2) open breather valve and the safety valve bottom valve that connecting ring oxidative ethane storage tank 1 tail gas exports, oxirane storage tank 1 tail gas is through condenser 2 condensations.
3) the tail gas condensate liquid gets into collecting tank 3, and interior circulation insulation is opened.
4) when collecting tank 3 liquid levels reach 80%, open and reclaim pump 5, directly pump into oxirane storage tank 1.
5) fixed gas directly discharges in the atmosphere after tail gas absorber 4 water absorb.
Claims (5)
1. the retracting device of a polyether polyol reaction dissolvent oxirane tail gas; It is characterized in that: described retracting device comprises condenser (2), collecting tank (3) and tail gas absorber (4); Condenser (2) is connected with the outlet of oxirane storage tank (1) tail gas; Condenser (2) outlet connects collecting tank (3), and the outlet of collecting tank (3) upper gas connects tail gas absorber (4).
2. the retracting device of oxirane tail gas according to claim 1 is characterized in that: chilled brine below condenser (2) outer circulation-10 ℃.
3. the retracting device of oxirane tail gas according to claim 1 is characterized in that: pipeline is connected between described collecting tank (3) and the oxirane storage tank (1), and pipeline is provided with and reclaims pump (5).
4. the retracting device of oxirane tail gas according to claim 3 is characterized in that: described recovery pump (5) is explosion-proof pump.
5. the retracting device of oxirane tail gas according to claim 1 is characterized in that: described tail gas absorber (4) is the water absorption tower, and height is greater than 15 meters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203386301U CN202191720U (en) | 2011-09-09 | 2011-09-09 | Recovery device for tail gas of oxirane for polyether polyol |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203386301U CN202191720U (en) | 2011-09-09 | 2011-09-09 | Recovery device for tail gas of oxirane for polyether polyol |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202191720U true CN202191720U (en) | 2012-04-18 |
Family
ID=45946652
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203386301U Expired - Fee Related CN202191720U (en) | 2011-09-09 | 2011-09-09 | Recovery device for tail gas of oxirane for polyether polyol |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202191720U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108358151A (en) * | 2018-04-23 | 2018-08-03 | 中国化学赛鼎宁波工程有限公司 | A kind of factory monitors with ethylene oxide, storage, recycling and handling system |
| PL425052A1 (en) * | 2018-03-28 | 2019-10-07 | Icso Chemical Production Spółka Z Ograniczoną Odpowiedzialnością | Method for reduction of emission of volatile organic compounds and the system for its execution |
-
2011
- 2011-09-09 CN CN2011203386301U patent/CN202191720U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| PL425052A1 (en) * | 2018-03-28 | 2019-10-07 | Icso Chemical Production Spółka Z Ograniczoną Odpowiedzialnością | Method for reduction of emission of volatile organic compounds and the system for its execution |
| CN108358151A (en) * | 2018-04-23 | 2018-08-03 | 中国化学赛鼎宁波工程有限公司 | A kind of factory monitors with ethylene oxide, storage, recycling and handling system |
| CN108358151B (en) * | 2018-04-23 | 2020-05-08 | 中国化学赛鼎宁波工程有限公司 | Ethylene oxide monitoring, storing, recovering and loading and unloading system for factory |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120418 Termination date: 20170909 |