CN210729140U - Polyvinyl chloride paste resin drying tail gas recovery and purification device - Google Patents
Polyvinyl chloride paste resin drying tail gas recovery and purification device Download PDFInfo
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- CN210729140U CN210729140U CN201921466511.7U CN201921466511U CN210729140U CN 210729140 U CN210729140 U CN 210729140U CN 201921466511 U CN201921466511 U CN 201921466511U CN 210729140 U CN210729140 U CN 210729140U
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- tail gas
- polyvinyl chloride
- paste resin
- draught fan
- alkali liquor
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Abstract
The utility model relates to a polyvinyl chloride paste resin drying tail gas recovery purifier belongs to paste resin production technical field. Polyvinyl chloride paste resin drying tail gas recovery purifier, including alkali lye spray column, alkali lye spray column lower part access connection tail gas lets in the pipeline, sets up draught fan B on the tail gas lets in the pipeline, alkali lye spray column's gaseous phase exit linkage active carbon fiber adsorption equipment import, active carbon fiber adsorption equipment exit linkage draught fan A inlet, draught fan A outlet connection discharges the chimney. The device can effectively wash dust and acid gas in the dry production tail gas with alkaline to can adsorb chloroethylene about 85%, reduce the gaseous pollutants that discharges in the atmosphere, satisfy the environmental protection requirement.
Description
Technical Field
The utility model relates to a polyvinyl chloride paste resin drying tail gas recovery purifier belongs to paste resin production technical field.
Background
The polyvinyl chloride paste resin is usually prepared by emulsion polymerization and microsuspension polymerization, and the polyvinyl chloride prepared by the emulsion polymerization has great difference in molecular weight, and the polyvinyl chloride prepared by the microsuspension polymerization has good molecular weight distribution uniformity, excellent flow property, and better thermal stability and water resistance, so that the polyvinyl chloride paste resin is increasingly applied.
The traditional vinyl chloride micro-suspension polymerization is divided into several steps of chemical preparation, polymerization, recycling and discharging, spray drying and crushing, sewage semi-automatic treatment and the like, the existing tail gas is discharged through a drying chimney after dust is collected by a filter bag of a drying bag filter, and the tail gas contains a large amount of HCl, vinyl chloride gas, methylbenzene and the like, so that the environmental protection index cannot be reached, and the increasingly-promoted environmental protection requirement cannot be met.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: overcome prior art's not enough, provide a purifier is retrieved to polyvinyl chloride paste resin drying tail gas, the device can effectively wash with alkaline dust and acid gas in the dry production tail gas to can adsorb 85% vinyl chloride about, reduce the polluted gas who discharges in the atmosphere, satisfy the environmental protection requirement.
The utility model provides a technical scheme that its technical problem adopted is:
the utility model provides a purifier is retrieved to dry tail gas of polyvinyl chloride paste resin, including the alkali lye spray column, alkali lye spray column lower part access connection tail gas lets in the pipeline, sets up draught fan B on the tail gas lets in the pipeline, and the gaseous phase exit linkage active carbon fiber adsorption equipment import of alkali lye spray column, active carbon fiber adsorption equipment exit linkage draught fan A inlet, the chimney is discharged in the connection of draught fan A export.
Wherein:
and an alkali liquor inlet in the middle of the alkali liquor spray tower is connected with an alkali liquor box, and an electromagnetic valve is arranged on a pipeline between the alkali liquor box and the alkali liquor spray tower.
And a stirring device is arranged in the alkaline solution tank.
The working principle and the process are as follows:
the tail gas generated by drying passes through an alkali liquor spray tower with the alkali liquor concentration of 11, so that HCl in the gas can be effectively removed, polyvinyl chloride dust contained in the gas is cleaned, and the chlorine ethylene is degraded to a certain extent. The tail gas enters the activated carbon fiber adsorption device after passing through the alkali liquor spray tower, the front section is a dewatering section, the rear section is an adsorption section, the tail gas is dewatered by the dewatering section and then enters the adsorption section for adsorption, the adsorption capacity of vinyl chloride can reach 85%, and the tail gas after alkali washing and adsorption is discharged from a discharge chimney.
Controlling the pH value of the alkali liquor spray tower to be 9-12, controlling by an electromagnetic valve, opening when the pH value is less than 9, and closing when the pH value is more than 12 to finish automatic alkali addition. The tail gas after alkaline washing and adsorption is pumped by a draught fan A and is discharged from a discharge chimney.
And the tail gas inlet pipeline is provided with an induced draft fan B, and the wind power of the induced draft fan A is only adopted to meet the requirement, so that the recovery and purification effects are poor.
The utility model has the advantages that:
the device can effectively wash dust and acid gas in the dry production tail gas with alkaline to can adsorb chloroethylene about 85%, reduce the gaseous pollutants that discharges in the atmosphere, satisfy the environmental protection requirement.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
in the figure: 1. an alkali liquor spray tower; 2. an activated carbon fiber adsorption device; 3. a draught fan A; 4. a discharge chimney; 5. a draught fan B; 6. an alkaline liquid tank; 7. an electromagnetic valve.
Detailed Description
The embodiments of the present invention will be further explained with reference to the accompanying drawings:
example 1
As shown in fig. 1, the device for recovering and purifying the dry tail gas of polyvinyl chloride paste resin comprises an alkali liquor spray tower 1, wherein an inlet at the lower part of the alkali liquor spray tower 1 is connected with a tail gas inlet pipeline, a draught fan B5 is arranged on the tail gas inlet pipeline, a gas phase outlet of the alkali liquor spray tower 1 is connected with an inlet of an activated carbon fiber adsorption device 2, an outlet of the activated carbon fiber adsorption device 2 is connected with an inlet of a draught fan A3, and an outlet of the draught fan A3 is connected with a discharge chimney 4.
Wherein:
an alkali liquor inlet in the middle of the alkali liquor spray tower 1 is connected with an alkali liquor box 6, and an electromagnetic valve 7 is arranged on a pipeline between the alkali liquor box 6 and the alkali liquor spray tower 1.
And a stirring device is arranged in the lye tank 6.
The activated carbon fiber adsorption device 2 is commercially available finished product equipment.
The tail gas generated by drying passes through the alkali liquor spray tower 1 with the alkali liquor concentration of 11, so that HCl in the gas can be effectively removed, polyvinyl chloride dust contained in the gas is cleaned, and the polyvinyl chloride is degraded to a certain extent. The tail gas enters an activated carbon fiber adsorption device 2 after passing through an alkali liquor spray tower 1, the front section is a dewatering section, the rear section is an adsorption section, the tail gas is dewatered by the dewatering section and then enters the adsorption section for adsorption, the adsorption capacity of vinyl chloride can reach 85%, and the tail gas after alkali washing and adsorption is discharged from a discharge chimney 4.
Controlling the pH value of the alkali liquor spray tower 1 to be 9-12, controlling the pH value to be less than 9 through an electromagnetic valve 7, and closing the alkali liquor spray tower when the pH value is greater than 12 to finish automatic alkali addition. The tail gas after alkaline washing and adsorption is pumped away from the exhaust chimney 4 by an induced draft fan A3.
The tail gas is introduced into the pipeline and is provided with an induced draft fan B5, and the wind power of the induced draft fan A3 can not meet the requirement, so that the recovery and purification effect is poor.
As used herein, induced draft fans a3 and B5, those skilled in the art will know: the use of "a" and "B" is merely for convenience of description to distinguish between components and parts, and is not intended to distinguish themselves, unless otherwise stated, and the above-described words are not intended to have a special meaning.
Claims (3)
1. The utility model provides a purifier is retrieved to dry tail gas of polyvinyl chloride paste resin which characterized in that: including alkali lye spray column (1), alkali lye spray column (1) lower part access connection tail gas lets in the pipeline, and the tail gas lets in and sets up draught fan B (5) on the pipeline, and the gaseous phase exit linkage activated carbon fiber adsorption equipment (2) of alkali lye spray column (1) import, and activated carbon fiber adsorption equipment (2) exit linkage draught fan A (3) import, draught fan A (3) exit linkage discharge chimney (4).
2. The polyvinyl chloride paste resin drying tail gas recovery and purification device according to claim 1, characterized in that: an alkali liquor inlet in the middle of the alkali liquor spray tower (1) is connected with an alkali liquor box (6), and an electromagnetic valve (7) is arranged on a pipeline between the alkali liquor box (6) and the alkali liquor spray tower (1).
3. The polyvinyl chloride paste resin drying tail gas recovery and purification device according to claim 2, characterized in that: and a stirring device is arranged in the alkaline liquid tank (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921466511.7U CN210729140U (en) | 2019-09-04 | 2019-09-04 | Polyvinyl chloride paste resin drying tail gas recovery and purification device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921466511.7U CN210729140U (en) | 2019-09-04 | 2019-09-04 | Polyvinyl chloride paste resin drying tail gas recovery and purification device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210729140U true CN210729140U (en) | 2020-06-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921466511.7U Active CN210729140U (en) | 2019-09-04 | 2019-09-04 | Polyvinyl chloride paste resin drying tail gas recovery and purification device |
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| CN (1) | CN210729140U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112354340A (en) * | 2020-10-27 | 2021-02-12 | 鄂尔多斯市君正能源化工有限公司 | Device and method for purifying and recovering residual vinyl chloride gas |
-
2019
- 2019-09-04 CN CN201921466511.7U patent/CN210729140U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112354340A (en) * | 2020-10-27 | 2021-02-12 | 鄂尔多斯市君正能源化工有限公司 | Device and method for purifying and recovering residual vinyl chloride gas |
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