CN202052518U - Vacuum system for producing polyether glycol - Google Patents
Vacuum system for producing polyether glycol Download PDFInfo
- Publication number
- CN202052518U CN202052518U CN2011200732213U CN201120073221U CN202052518U CN 202052518 U CN202052518 U CN 202052518U CN 2011200732213 U CN2011200732213 U CN 2011200732213U CN 201120073221 U CN201120073221 U CN 201120073221U CN 202052518 U CN202052518 U CN 202052518U
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- CN
- China
- Prior art keywords
- pump
- vacuum
- water ring
- vacuum system
- roots
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a vacuum system for producing polyether glycol. The vacuum system comprises a reaction kettle (1), vacuum pipelines (2), a condenser (3) and a buffer tank (4), wherein the reaction kettle (1), the condenser (3) and the buffer tank (4) are arranged in series in sequence through the vacuum pipelines (2); the vacuum system is characterized in that: the pipeline at an outlet of the buffer tank (4) is connected with a roots vacuum pump (5) and a water ring vacuum pump (6); and the roots vacuum pump (5) and the water ring vacuum pump (6) are arranged in parallel. In the vacuum system for producing the polyether glycol, the water ring vacuum pump is used as a vacuum primary pump and the roots vacuum pump is used as a secondary pump to constitute a roots pump-water ring pump unit. The primary pump is turned on when a large amount of gas is sucked, and the secondary pump is turned on when the vacuum degree is low, so that impurities such as small molecules and the like produced during production of the polyether glycol can be effectively removed and the product quality can be improved.
Description
Technical field
The utility model relates to a kind of vacuum system, relates in particular to a kind of vacuum system of producing PPG, belongs to the chemical production equipment technical field.
Background technology
PPG synthesizes the organic polymer reaction, can produce compounds such as some small molecule aldehydes in polymerization process, also can bring part moisture in the PPG raw material into, if do not remove totally, will influence the quality of product.
Traditional water ring pump has simple in structure, and rate of air sucked in required is big, because the gas compression is an isothermal in the water ring pump, can extract inflammable and explosive gas, and is comparatively commonly used in the production of PPG.Because the influence of water saturation vapour pressure, the end vacuum value of water ring pump is lower, removes micro-moisture and little molecule is limited in one's ability.It is higher that lobe pump has final vacuum, but if directly take out a large amount of gases, because pressure reduction is too big, Roots vaccum pump will transship and damage.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned deficiency, and a kind of vacuum system that can efficiently remove the impurity such as little molecule that produce in the PPG production, the production PPG that improves the quality of products is provided.
The purpose of this utility model is achieved in that a kind of vacuum system of producing PPG, it comprises reactor, vacuum pipeline, condenser and surge tank, described reactor, condenser and surge tank are by the vacuum pipeline setting of connecting successively, and wherein: be connected with Roots vaccum pump on the described surge tank outlet line and be connected with water ring vacuum pump, described Roots vaccum pump and water ring vacuum pump are arranged in parallel.
Operation principle:
As vacuum one-level pump, Roots vaccum pump is formed a lobe pump-water ring pump unit as two stage pump with water ring vacuum pump.When taking out a large amount of gases, open the one-level pump, less than-0.090Mpa the time, open two stage pump in vacuum.
Compared with prior art, the beneficial effects of the utility model are:
The utility model is produced the vacuum system of PPG, can efficiently remove the impurity such as little molecule that produce in the PPG production, improves the quality of products.
Description of drawings
Fig. 1 produces the structural representation of the vacuum system of PPG for the utility model.
Wherein: reactor 1, vacuum pipeline 2, condenser 3, surge tank 4, Roots vaccum pump 5, water ring vacuum pump 6.
The specific embodiment
Referring to Fig. 1, a kind of vacuum system of producing PPG that the utility model relates to, mainly by reactor 1, vacuum pipeline 2, condenser 3, surge tank 4, Roots vaccum pump 5 and water ring vacuum pump 6 are formed, described reactor 1, condenser 3 and surge tank 4 is by vacuum pipeline 2 setting of connecting successively, described surge tank 4 outlets are connected with water ring vacuum pump 6 with Roots vaccum pump 5 respectively by vacuum pipeline 2, and described Roots vaccum pump 5 and water ring vacuum pump 6 are arranged in parallel forms a lobe pump-water ring pump unit.
As vacuum one-level pump, Roots vaccum pump 5 is formed a lobe pump-water ring pump unit as two stage pump with water ring vacuum pump 6.When taking out a large amount of gases, open the one-level pump, less than-0.090Mpa the time, open two stage pump in vacuum.
Claims (1)
1. vacuum system of producing PPG, it comprises reactor (1), vacuum pipeline (2), condenser (3) and surge tank (4), described reactor (1), condenser (3) and surge tank (4) are by vacuum pipeline (2) setting of connecting successively, and it is characterized in that: be connected with Roots vaccum pump (5) on described surge tank (4) outlet line and be connected with water ring vacuum pump (6), described Roots vaccum pump (5) and water ring vacuum pump (6) are arranged in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200732213U CN202052518U (en) | 2011-03-19 | 2011-03-19 | Vacuum system for producing polyether glycol |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200732213U CN202052518U (en) | 2011-03-19 | 2011-03-19 | Vacuum system for producing polyether glycol |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202052518U true CN202052518U (en) | 2011-11-30 |
Family
ID=45012505
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200732213U Expired - Fee Related CN202052518U (en) | 2011-03-19 | 2011-03-19 | Vacuum system for producing polyether glycol |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202052518U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20150118083A (en) * | 2012-12-18 | 2015-10-21 | 우데 인벤타-피셔 게엠바하 | Device and method for removing a cyclic diester from polymer melts |
| CN109202069A (en) * | 2018-10-16 | 2019-01-15 | 晋城鸿刃科技有限公司 | Hard alloy degreasing equipment and method |
-
2011
- 2011-03-19 CN CN2011200732213U patent/CN202052518U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20150118083A (en) * | 2012-12-18 | 2015-10-21 | 우데 인벤타-피셔 게엠바하 | Device and method for removing a cyclic diester from polymer melts |
| KR101982543B1 (en) | 2012-12-18 | 2019-05-27 | 우데 인벤타-피셔 게엠바하 | Device and method for removing a cyclic diester from polymer melts |
| CN109202069A (en) * | 2018-10-16 | 2019-01-15 | 晋城鸿刃科技有限公司 | Hard alloy degreasing equipment and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111130 Termination date: 20140319 |