CN203754415U - System for removing free chlorine from hydrogen chloride gas - Google Patents
System for removing free chlorine from hydrogen chloride gas Download PDFInfo
- Publication number
- CN203754415U CN203754415U CN201420082554.6U CN201420082554U CN203754415U CN 203754415 U CN203754415 U CN 203754415U CN 201420082554 U CN201420082554 U CN 201420082554U CN 203754415 U CN203754415 U CN 203754415U
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- hydrogen chloride
- free chlorine
- chloride gas
- pipeline
- tower
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Abstract
The utility model discloses a system for removing free chlorine from hydrogen chloride gas, in particular relates to a system for removing free chlorine from hydrogen chloride gas during production of PVC resin by adopting a calcium carbide process, and is used for solving the technical problem of major potential safety hazard of free chloride in the hydrogen chloride gas during the production of the PVC resin. The system comprises a circulating pump, a dechlorinating tower and a demister which are connected in sequence, wherein a lower inlet of the dechlorinating tower is connected with a pipeline I of the hydrogen chloride gas before the removal of free chlorine; the demister is communicated with a top outlet through a pipeline II; the circulating pump is communicated with an upper inlet and a bottom outlet through a pipeline III for entry of a stannous chloride solution into the tower and a pipeline IV for discharge of the stannous chloride solution from the tower respectively; the hydrogen chloride gas after the removal of free chlorine in the demister is discharged through a pipeline VI of the hydrogen chloride gas after the removal of free chloride. The system adopting the structure is simple, low in operating cost and suitable for industrialized production.
Description
Technical field
The utility model relates to a kind of removal system of free chlorine, is specifically related to the system of removing hydrogen chloride gas free chlorine when a kind of calcium carbide route operational path is produced polyvinyl chloride resin.
Background technology
While adopting calcium carbide route operational path to produce polyvinyl chloride resin, mixed gas enters the front hydrogenchloride of transmodulator and acetylene gas mixes by flow proportional, if higher containing free chlorine in hydrogen chloride gas, acetylene and chlorine, while mixing, vigorous reaction can occur, there is detonation in the lighter, severe patient is blasted.Therefore, the existence of PVC resin produced by calcium carbide process hydrogen chloride gas free chlorine becomes the major safety risks of this technique.
General production in polyvinyl chloride resin process, hydrogen and chlorine that caustic soda production facilities produces enter two-in-one Reaktionsofen in proportion, control the mol ratio of hydrogen and chlorine 1.05 ~ 1.1, hydrogen and chlorine is combustion reactions and cooling in synthetic furnace, hydrogen chloride gas body burden is more than 94%, temperature 20 ~ 40 degree, free chlorine is less than 10PPm, then goes PVC device to mix with the acetylene gas that acetylene operation produces through surge tank.In hydrogen chloride gas, hydrogen chloride content and free chlorine index rely on and regulate the amounts of hydrogen that enters synthetic furnace to control.For making hydrogen chloride gas free chlorine content in safety range, it is excessive that commercial run general control enters the hydrogen of two-in-one synthetic furnace, when synthetic furnace lamp holder damages or when technological fluctuation is larger, may cause Cl
2what burn not exclusively exceeds standard free chlorine, and in the time that free chlorine content is higher, hydrogenchloride and acetylene gas, while mixing, vigorous reaction can occur, and explosion appears in the lighter, when serious, can blast.
Summary of the invention
The technical problems to be solved in the utility model is the major safety risks that exist of PVC resin produced by calcium carbide process hydrogen chloride gas free chlorine, a kind of free chlorine of removing completely in hydrogen chloride gas is provided, ensures the system of removing hydrogen chloride gas free chlorine of the safety that acetylene and hydrogen chloride gas mix from technique.
For achieving the above object, the utility model adopts following technical proposals: a kind of system of removing hydrogen chloride gas free chlorine, comprise the recycle pump connecting successively, dechlorinator and mist eliminator, described dechlorinator is provided with below entrance and top exit, top entrance and outlet at bottom, below entrance is connected with hydrogen chloride gas pipeline I before de-free chlorine, mist eliminator communicates with top exit by pipeline II, recycle pump enters tower pipeline III and stannous chloride solution by stannous chloride solution and goes out tower pipeline IV and communicate with top entrance and outlet at bottom respectively, hydrogen chloride gas in described mist eliminator after de-free chlorine is discharged by the hydrogen chloride gas pipeline VI after free chlorine.
Described stannous chloride solution goes out tower pipeline IV and is also connected with new stannous chloride solution pipeline V.
The utility model installs a set of system of removing free chlorine additional before hydrogenchloride and acetylene gas mixing, making hydrogen chloride gas enter this device contacts with reducing solution, reductibility chemicals generation redox reaction in gas free chlorine and solution, thus remove the free chlorine in hydrogen chloride gas.
Can reduce the mol ratio that enters synthetic furnace hydrogen and chlorine 1.02 ~ 1.05, ensure that free chlorine, in safety control scope, can improve the content of hydrogenchloride simultaneously, reduce the hydrogen consumption of producing hydrogen chloride gas.The dechlorinating agent tin protochloride that the utility model adopts is easy to get, and device is simple, is applicable to suitability for industrialized production, and running cost is low.
Brief description of the drawings
Fig. 1 is the utility model structural representation.
Embodiment
As shown in Figure 1, the utility model comprises the recycle pump 5 connecting successively, dechlorinator 4 and mist eliminator 6, described dechlorinator 4 is provided with below entrance a and top exit b, top entrance c and outlet at bottom d, below entrance a is connected with hydrogen chloride gas pipeline I1 before de-free chlorine, mist eliminator 6 communicates with top exit b by pipeline II7, recycle pump 5 enters tower pipeline III8 and stannous chloride solution by stannous chloride solution and goes out tower pipeline IV8 and communicate with top entrance c and outlet at bottom d respectively, hydrogen chloride gas after the interior de-free chlorine of described mist eliminator 6 is discharged by the hydrogen chloride gas pipeline VI2 after free chlorine.
Described stannous chloride solution goes out tower pipeline IV8 and is also connected with new stannous chloride solution pipeline V3.
Stannous chloride solution has very strong reductibility, and discord hydrogenchloride reacts, and has higher solubleness in concentrated hydrochloric acid, and this chemicals and reactant can be unharmful to transforming mercuric chleride catalyst.The sub-tin of the utility model selective chlorination is as antichlor, and strength of solution is 1 ~ 10%, for ensureing the stability of tin protochloride, adopts concentrated hydrochloric acid preparation stannous chloride solution.Stannous chloride solution content is controlled at 1 ~ 10%, discharges absorption liquid when content lower than 1% time, adds the stannous chloride solution 3 of preparation again.Because hydrogen chloride gas free chlorine content is very low, the interior temperature of dechlorinator 4 can not change, and tower temperature remains on hydrogenchloride and go out temperature 20 ~ 40 degree of two-in-one synthetic furnace.Remove control hydrogen chloride gas free chlorine content after the free chlorine in hydrogen chloride gas below 10PPm, ensure the safety that hydrogen chloride gas and acetylene mix.
Hydrogen chloride gas 1 before the de-free chlorine that hydrogen and chlorine produce in two-in-one synthetic furnace enters in dechlorinator's tower from entrance a below dechlorinator 4, contact with the stannous chloride solution being pumped into through top entrance c by recycle pump 5 from bottom to top, gas free chlorine and tin protochloride reaction generate tin chloride and enter solution, thereby remove gas free chlorine, hydrogen chloride gas out enters mist eliminator 6 from top exit b and removes the hydrogen chloride gas 2 that the acid mist of gas entrainment obtains de-free chlorine and send to polyvinyl chloride resin production equipment.Stannous chloride solution is entered in dechlorinator from dechlorinator 4 top entrance c by recycle pump pressurization, and with hydrogen chloride gas contact reacts, tower bottom stannous chloride solution is extracted out and circulated by recycle pump.
Claims (2)
1. remove the system of hydrogen chloride gas free chlorine for one kind, it is characterized in that: comprise the recycle pump (5) connecting successively, dechlorinator (4) and mist eliminator (6), described dechlorinator (4) is provided with below entrance (a) and top exit (b), top entrance (c) and outlet at bottom (d), below entrance (a) and hydrogen chloride gas pipeline I(1 before de-free chlorine) be connected, mist eliminator (6) is by pipeline II(7) communicate with top exit (b), recycle pump (5) enters tower pipeline III(8 by stannous chloride solution) and stannous chloride solution go out tower pipeline IV(8) communicate with top entrance (c) and outlet at bottom (d) respectively, hydrogen chloride gas in described mist eliminator (6) after de-free chlorine is by the hydrogen chloride gas pipeline VI(2 after free chlorine) discharge.
2. system of removing hydrogen chloride gas free chlorine according to claim 1, is characterized in that: described stannous chloride solution goes out tower pipeline IV(8) also with new stannous chloride solution pipeline V(3) be connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420082554.6U CN203754415U (en) | 2014-02-26 | 2014-02-26 | System for removing free chlorine from hydrogen chloride gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420082554.6U CN203754415U (en) | 2014-02-26 | 2014-02-26 | System for removing free chlorine from hydrogen chloride gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203754415U true CN203754415U (en) | 2014-08-06 |
Family
ID=51249714
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420082554.6U Expired - Fee Related CN203754415U (en) | 2014-02-26 | 2014-02-26 | System for removing free chlorine from hydrogen chloride gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203754415U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108654567A (en) * | 2018-05-14 | 2018-10-16 | 东南大学 | Remove the high temperature antichlor and preparation method thereof of HCl gases in flue gas |
| CN115006975A (en) * | 2022-05-07 | 2022-09-06 | 南通星球石墨股份有限公司 | Method for recycling hydrogen chloride in dichlorobenzene byproducts |
-
2014
- 2014-02-26 CN CN201420082554.6U patent/CN203754415U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108654567A (en) * | 2018-05-14 | 2018-10-16 | 东南大学 | Remove the high temperature antichlor and preparation method thereof of HCl gases in flue gas |
| CN108654567B (en) * | 2018-05-14 | 2020-02-07 | 东南大学 | Medium-high temperature dechlorinating agent for removing HCl gas in flue gas and preparation method thereof |
| CN115006975A (en) * | 2022-05-07 | 2022-09-06 | 南通星球石墨股份有限公司 | Method for recycling hydrogen chloride in dichlorobenzene byproducts |
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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 |
Granted publication date: 20140806 Termination date: 20150226 |
|
| EXPY | Termination of patent right or utility model |