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Leakage test method of polymerization kettle

A technology for polymerization kettle and leak testing, which is applied in the testing of fluid tightness, testing of machine/structural components, and detecting the appearance of fluid at the leakage point, etc., which can solve the problem of affecting equipment utilization, reducing production efficiency, and taking a long time for leakage and other issues to achieve the effects of saving costs, improving production efficiency, and reducing testing time

Inactive Publication Date: 2019-11-12
XINJIANG HUATAI HEAVY CHEM CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it takes too long to detect leakage by injecting nitrogen gas, and the entire pressing process takes about 5-6 hours. The time is long, which affects the utilization rate of equipment and reduces production efficiency.

Method used

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  • Leakage test method of polymerization kettle
  • Leakage test method of polymerization kettle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] This embodiment provides a leak test method for a polymerization kettle, and the specification of this polymerization kettle is 60m 3 , for the production of polyvinyl chloride, comprising the following steps:

[0038] S1. After cleaning the inside of the polymerization kettle, first vacuumize the polymerization kettle to -0.05Mpa, and then inject 4m 3 Vinyl chloride monomer at -13°C; observe whether the pipeline flange on the outside of the polymerization kettle is sealed and connected. If there is leakage, recover the vinyl chloride monomer in the polymerization kettle and tighten the pipeline flange. Inject 2.5 tons of vinyl chloride monomers; if there is no leakage, directly continue to inject 2.5 tons of vinyl chloride monomers; the total quality of adding the monomers is 2.5 tons.

[0039] S2, in the polymerization kettle of step S1 again with 35m 3 Inject hot water at a rate of 80°C at a rate of / h. The hot water enters the polymerization kettle and transfers h...

Embodiment 2

[0045] This embodiment provides a leak test method for a polymerization kettle, and the specification of this polymerization kettle is 110m 3 , for the production of polyvinyl chloride, comprising the following steps:

[0046] S1. After cleaning the inside of the polymerization kettle, vacuumize the polymerization kettle to -0.05Mpa first, and then inject 5m 3 Vinyl chloride monomer at -13°C; observe whether the pipeline flange on the outside of the polymerization kettle is sealed and connected. If there is leakage, recover the vinyl chloride monomer in the polymerization kettle and tighten the pipeline flange. Inject 4 tons of vinyl chloride monomer; if there is no leakage, directly continue to inject 4 tons of vinyl chloride monomer;

[0047] S2, to the polymerization kettle in the step S1 again with 50m 3 Inject hot water at a rate of 85°C at a rate of / h. The hot water enters the polymerization kettle and transfers heat to the monomers. The monomers are heated and vapori...

Embodiment 3

[0053] This embodiment provides a leak test method for a polymerization kettle, and the specification of this polymerization kettle is 130m 3 , for producing polypropylene, comprising the following steps:

[0054] S1. After cleaning the inside of the polymerization kettle, vacuumize the polymerization kettle to -0.05Mpa first, and then inject 5m 3 Propylene monomer at -47°C; observe whether the pipeline flange on the outside of the polymerization kettle is sealed and connected. If leakage occurs, recover the propylene monomer in the polymerization kettle and tighten the pipeline flange. After tightening, re-insert 5 tons of propylene monomer; if there is no leakage, directly continue to inject 5 tons of propylene monomer;

[0055] S2, then to the polymerization kettle in the step S1 with 60m 3 The rate of / h injects hot water at a temperature of 75°C. The hot water enters the polymerization kettle and transfers heat to the propylene monomer, which is heated and vaporized, wh...

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Abstract

The invention relates to a leakage test method of a polymerization kettle, and belongs to the technical field of chemical production. The leakage test method comprises the following steps ofS1, addinga monomer with the boiling point being -80 DEG C to 30 DEG C into the polymerization kettle; S2, injecting hot water into the polymerization kettle in the step S1, so that the monomer is heated to begasified, and the pressure in the polymerization kettle is increased; S3, observing a pressure value in the polymerization kettle, and stopping injecting the hot water when the pressure is increasedto 1 Mpa; S4, coating the joint of a kettle body and a pipeline flange and the joint of a stirring shaft and the kettle body with foam water, controlling the pressure in the polymerization kettle to be maintained for 10-15 minutes, and observing whether bubbles are generated or not; and S5, recovering the monomer in the polymerization kettle after detection is finished. The method has the beneficial effects that the detection time for leakage of the polymerization kettle can be greatly shortened, so that the utilization rate of the polymerization kettle is improved, and meanwhile, the production benefit of an enterprise is improved.

Description

technical field [0001] The invention belongs to the technical field of chemical production, and in particular relates to a leak testing method for a polymerization kettle. Background technique [0002] The polymerization kettle is the main equipment used to prepare polymer compounds. The main process of use is to inject monomers into the polymerization kettle and carry out polymerization reaction through the polymerization kettle to obtain high molecular weight polymers. The polymerization kettle includes a kettle body, a pressure gauge, a stirring shaft and multiple pipeline flanges. The monomer is stirred and polymerized under the action of the stirring shaft in the kettle body. Because the high molecular polymer formed by polymerization generally has a high viscosity, in practice During the production process, the stirring shaft will stick to the kettle, which will cause the stirring shaft to fail to rotate, so the kettle needs to be cleaned regularly. After the polymeri...

Claims

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Application Information

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IPC IPC(8): G01M3/14
CPCG01M3/146
Inventor 姜禹陈凤李杰崔光荣张永锋尤天鹏
Owner XINJIANG HUATAI HEAVY CHEM CO LTD
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