CN207047136U - A kind of three-level cooling recovery system of VCM monomers - Google Patents
A kind of three-level cooling recovery system of VCM monomers Download PDFInfo
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- CN207047136U CN207047136U CN201720483643.5U CN201720483643U CN207047136U CN 207047136 U CN207047136 U CN 207047136U CN 201720483643 U CN201720483643 U CN 201720483643U CN 207047136 U CN207047136 U CN 207047136U
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Abstract
The utility model discloses a kind of three-level cooling recovery system of VCM monomers, including three cooling systems being sequentially connected by connecting pipe（That is one-level cooling system, two level cooling system, three-level cooling system）, each cooling system is made up of by two condensers connecting pipe, wherein, the front end of one-level cooling system is provided with an import, a decanter is provided between import and one-level cooling system, the rear end of three-level cooling system is provided with a stock chest, and stock chest is provided with exhaust relief valve.Recovery of the three-level recovery system of the present utility model to VCM has very good effect, and " ice blocks up " phenomenon will not occur in removal process, so as to maintain the pressure of whole system so that stable polymerization reaction carry out.
Description
Technical field
A kind of cooling recovery system is the utility model is related to, especially a kind of three-level cooling recovery system of VCM monomers.
Background technology
When preparing polyvinyl chloride using bulk polymerizod polyvinyl chloride polymerization technique, in polymerization process and polymerization is completed
Afterwards, have a large amount of unreacted VCM monomers to exist, these VCM monomers are needed to be de-gassed recovery, and at present, generally use is returned
Skill of knocking off is two level cooling recovery, and the monomer to be cooled down by two level cooling recovery system is transported in charging storage tank, with
Into next production cycle, and not solidifying gas is then discharged by tail gas regulating valve.
In the polymerization production process of bulk polymerizod polyvinyl chloride, using current two level cooling recovery system, not only it is grown
Phase even running is poor, and system fluctuation is big, following defect in removal process also be present：
1. after the condensation of cooling system, when carrying out not solidifying gas discharge, still there is a small amount of vinyl chloride gas in not solidifying gas
It is not condensed into liquid and is directly discharged, causes VCM consumption larger；
2. the water that VCM carries can be condensed into ice after condenser is entered, so that by blockage of condenser, it is commonly called as
" ice blocks up " phenomenon, staff need to be handled in time, increase operation difficulty；
After " 3. ice blocks up " occurs, not solidifying gas can not be smoothly discharged out outside system completely, cause the inert gas of recovery system
Gather, recovery system pressure rise, inert gas can enter next production cycle with VCM, so as to cause to polymerize
Abnormal reaction, production are unstable.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of three-level cooling recovery system of VCM monomers, passes through
After this recovery system, the vinyl chloride gas in VCM and gaseous mixture enters after being substantially completely condensed into Liquid vinyl chloride
Into stock chest, not during solidifying gas discharge, the waste of VCM will not be caused, the water that VCM carries can be arranged on back
Decanter in receipts system is removed, and avoids the generation of " ice blocks up ", and the inert gas in recovery system can be also smoothly discharged out,
The normal of system pressure is ensure that, polymerisation is stable, and production is steady.
Technical scheme is used by the utility model solves its technical problem：A kind of three-level cooling recovery of VCM monomers
System, including three cooling systems being sequentially connected by connecting pipe（That is one-level cooling system, two level cooling system, three-level
Cooling system）, each cooling system is made up of by two horizontal condensers connecting pipe, wherein, cooled down in the one-level
The front end of system is provided with an import, is provided with a stock chest in the three-level cooling system rear end, stock chest is provided with tail gas
Drain valve.
Further, the cooling medium that the horizontal condenser of the one-level cooling system uses is 1~10 DEG C of cooling water,
The cooling medium that the horizontal condenser of the two level cooling system uses is -30 DEG C -10 DEG C of chilled brine, the three-level cooling
The cooling medium that the horizontal condenser of system uses is -50 DEG C~-30 DEG C of chilled brine.
Further, a decanter is provided between the import and one-level cooling system.
The beneficial effects of the utility model are：By using three-level cooling recovery system of the present utility model to vinyl chloride list
When body is reclaimed, the vinyl chloride gas in gaseous mixture is substantially completely condensed into Liquid vinyl chloride, and is recycled in stock chest,
When gas is not coagulated in discharge, the waste of VCM will not be caused, the water that VCM carries can be arranged in recovery system
Decanter is removed, and so as to avoid the generation of " ice blocks up ", is ensured that the inert gas in recovery system can be successfully discharged, is entered
And maintain normal and polymerisation the stability of system pressure.
Brief description of the drawings
Fig. 1 is the structural representation of the three-level cooling recovery system of VCM monomers of the present utility model.
In figure mark for：1- connecting pipes, 2- one-level cooling systems, 3- two level cooling systems, 4- three-level cooling systems, 5-
Horizontal condenser, 6- imports, 7- stock chests, 8- exhaust relief valves, 9- decanters.
Embodiment
The utility model is further illustrated with reference to the accompanying drawings and examples.
As shown in figure 1, the three-level cooling recovery system of VCM monomers of the present utility model, including three pass through connecting pipe 1
The cooling system being sequentially connected, i.e. one-level cooling system 2, two level cooling system 3 and three-level cooling system 4, described three cold
But system is made up of by two horizontal condensers 5 some connecting pipes 1, wherein, the one-level cooling system 2 it is horizontal cold
The cooling medium that condenser 5 uses is 5 DEG C of cooling waters, the cooling medium that the horizontal condenser 5 of the two level cooling system 3 uses
For -25 DEG C of chilled brines, the cooling medium that the horizontal condenser 5 of the three-level cooling system 4 uses is -35 DEG C of chilled brines,
An import 6 is provided with the front end of one-level cooling system 2, a decantation is provided between the import 6 and one-level cooling system 2
Device 9, a stock chest 7 is provided with the rear end of three-level cooling system 4, and stock chest 7 is provided with an exhaust relief valve 8.
The course of work of the three-level cooling recovery system of VCM monomers of the present utility model is as follows：
First, will be arrived containing the complete vinyl chloride gas of a large amount of polymerisation unreacteds and its mixed gas delivery carried
At the import 6 of three-level cooling recovery system of the present utility model, the decanter for being located at the front end of one-level cooling system 2 is entered afterwards
In 9, the water that mixed gas carries is removed by the sedimentation water removal of decanter 9 effect, it is follow-up cold so as to avoid water from entering
But it is condensed into again by condenser 5 after ice in system and blocks condenser 5, causes " ice blocks up ", and then ensure that in mixed gas
Inert gas can be smoothly discharged out recovery system, make whole system pressure in normal range (NR), to ensure that polymerisation is put down
Surely, stably carry out, the mixed gas for being removed water afterwards sequentially enters one-level cooling system 2, two level cooling system 3 and three
In level cooling system 4, due to used in the condenser 5 of one-level cooling system 2, two level cooling system 3 and three-level cooling system 4
Formula reduces the temperature of cooling medium in gradient, it can be ensured that the substantially all quilt of the vinyl chloride gas contained in mixed gas
Liquid vinyl chloride is condensed into, enters be located in the stock chest 7 of the rear end of three-level cooling system 4 afterwards, complete to VCM
Recovery, the Liquid vinyl chloride monomer of recovery is used for next production cycle afterwards, and those are not condensed into liquid not yet
Solidifying gas is then discharged by the exhaust relief valve 8 being located on stock chest 7, due to being substantially free of gaseous chlorine in not solidifying gas now
Ethene, so in discharge not solidifying gas, the waste of VCM will not be caused, has saved resource.
It should be appreciated that above-mentioned embodiment of the present utility model is used only for exemplary illustration or explains this reality
With new principle, without forming to limitation of the present utility model.Therefore, without departing from spirit and scope of the present utility model
In the case of made any modification, equivalent substitution etc., should be included within the scope of protection of the utility model.
Claims (3)
- A kind of 1. three-level cooling recovery system of VCM monomers, it is characterised in that：Pass through connecting pipe including three（1）Phase successively One-level cooling system even（2）, two level cooling system（3）With three-level cooling system（4）, each cooling system is horizontal by two Condenser（5）Pass through connecting pipe（1）Composition, wherein, in the one-level cooling system（2）Front end be provided with an import（6）, In the three-level cooling system（4）Rear end be provided with a stock chest（7）, the stock chest（7）It is provided with exhaust relief valve （8）.
- 2. the three-level cooling recovery system of VCM monomers according to claim 1, it is characterised in that：The one-level cooling system System（2）Horizontal condenser（5）The cooling medium used is 1~10 DEG C of cooling water, the two level cooling system（3）It is horizontal The cooling medium that condenser uses is -30 DEG C -10 DEG C of chilled brine, the three-level cooling system（4）Horizontal condenser（5） The cooling medium used is -50 DEG C~-30 DEG C of chilled brine.
- 3. the three-level cooling recovery system of VCM monomers according to claim 2, it is characterised in that：In the import（6）With One-level cooling system（2）Between be provided with a decanter（9）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720483643.5U CN207047136U (en) | 2017-05-04 | 2017-05-04 | A kind of three-level cooling recovery system of VCM monomers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720483643.5U CN207047136U (en) | 2017-05-04 | 2017-05-04 | A kind of three-level cooling recovery system of VCM monomers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207047136U true CN207047136U (en) | 2018-02-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720483643.5U Active CN207047136U (en) | 2017-05-04 | 2017-05-04 | A kind of three-level cooling recovery system of VCM monomers |
Country Status (1)
| Country | Link |
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| CN (1) | CN207047136U (en) |
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2017
- 2017-05-04 CN CN201720483643.5U patent/CN207047136U/en active Active
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: YIBIN HAIFENG HERUI Co.,Ltd. Assignor: YIBIN TIANYUAN GROUP Co.,Ltd. Contract record no.: X2022980029967 Denomination of utility model: A three-stage cooling and recovery system for VCM monomer Granted publication date: 20180227 License type: Common License Record date: 20221230 |