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Method and device for condensing crude vinyl chloride

A crude vinyl chloride and vinyl chloride technology, which is used in steam/steam condensers, solidification, refrigeration and liquefaction, etc., can solve problems such as water shortage, and achieve the effect of alleviating water shortage, improving promotion prospects and solving water shortage.

Pending Publication Date: 2020-07-28
CHINA CHENGDA ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Especially for water-scarce areas in the north, where the temperature is low and dry, circulating water is used as the cooling medium in the tube-and-tube heat exchanger, which requires a large amount of circulating water, and sometimes there are technical problems of insufficient water source

Method used

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  • Method and device for condensing crude vinyl chloride
  • Method and device for condensing crude vinyl chloride
  • Method and device for condensing crude vinyl chloride

Examples

Experimental program
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Effect test

Embodiment 1

[0039]A method for condensing crude vinyl chloride, comprising a compression step, an after-machine cooling step, a first-stage total condensation step, a second-stage total condensation step, and a tail cooling step, wherein the condensation in the first-stage total condensation step is an air cooling method. The total condenser used in the air cooling method is an air cooler. The pressure of the crude vinyl chloride gas before entering the condensation step is 0.64 or 0.65MPaG, and the temperature is 60 or 65°C. In the optimized scheme, the pressure is 0.645MPaG, and the temperature is 60°C.

[0040] The refined vinyl chloride gas is condensed through the vinyl chloride compressor, the aftercooler, the crude vinyl chloride drying system and the air cooler in turn, and the uncondensed gas enters the second-stage total condenser and the tail cooler for further condensation, and the uncondensed gas enters the tail gas adsorption system for adsorption ; The condensate in the air...

Embodiment 2

[0044] A method for condensing crude vinyl chloride comprises a compression step, an after-machine cooling step, a first-stage total condensation step, a second-stage total condensation step, and a tail cooling step, wherein the condensation in the first-stage total condensation step is air-cooled.

[0045] The total condenser in the air cooling mode is an air cooler with a header fin structure, using a light tube with an outer diameter of 25mm and a fin with a height of 12.5mm. Sprayers are installed on the fins, and cooling coils are installed on the air cooler, which is a special-shaped coil group structure, and the cooling coils are hot-dip galvanized at 475 °C.

[0046] The pressure of the crude vinyl chloride gas before entering the condensation step is 0.645MPaG, and the temperature is 60°C.

[0047] The fan motor of the air cooler adopts a variable frequency motor, and the air cooler is provided with louvers, and a protective net is arranged on the louvers.

[0048] T...

Embodiment 3

[0050] A device for condensing crude vinyl chloride, which is equipped with a vinyl chloride compressor, an aftercooler, a crude vinyl chloride drying system, an air cooler, a first-stage total condenser, a second-stage total condenser, an exhaust gas adsorption system, a tail cooler, and a vinyl chloride storage Tank, liquid-phase vinyl chloride rectification system and pump, vinyl chloride compressor and crude vinyl chloride drying system are connected through after-machine cooler, crude vinyl chloride drying system is connected with one-stage total condenser, and one-stage total condenser is respectively connected with The tank is connected to the second-stage total condenser, and the second-stage total condenser is also connected to the vinyl chloride storage tank and one end of the tail cooler; the other end of the tail cooler is connected to the exhaust gas adsorption system, and the other end of the tail cooler is connected to the second-stage total condenser and the viny...

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Abstract

The invention belongs to the technical field of chemical condensation, and in particular relates to a method and a device for condensing crude vinyl chloride, which is applied to the condensation of crude vinyl chloride in the rectification process of a vinyl chloride unit by an acetylene method. The method comprises a compression step, a post-cooling step, a one-stage total condensation step, a two-stage total condensation step and a tail-cooling step. The method is characterized in that the condensation in the one-stage total condensation step adopts an air-cooling mode. An air-cooler is used to cool and condense the cleaned and compressed crude vinyl chloride gas, and air cooling is used instead of water cooling. Thus, a lot of circulating water consumption can be saved, the cooling effect is obvious, and the method and the device have obvious economic and social benefits.

Description

technical field [0001] The invention belongs to the technical field of chemical condensation, and in particular relates to a method and device for condensing crude vinyl chloride, which is applied to the condensation of crude vinyl chloride in the rectification process of an acetylene method vinyl chloride plant. Background technique [0002] Vinyl chloride, also known as vinyl chloride, is an important monomer used in polymer chemical industry, which can be prepared from ethylene or acetylene. [0003] In the synthesis reaction of acetylene method vinyl chloride, the crude vinyl chloride gas produced by the acetylene method vinyl chloride plant reaction is cooled, washed with water and alkali, mercury is removed and compressed, and then sent to the condenser, and then passed through the first stage of total condenser and the second stage of total condensation After cooling down and condensing gradually in the exhaust cooler and tail cooler, they are then sent to the rectifi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25J5/00F25J3/02F28B1/06F28B1/02F28B5/00F28B9/02F28B9/04
CPCF25J5/00F25J3/0295F28B1/06F28B1/02F28B5/00F28B9/02F28B9/04
Inventor 赵雯婷梁建平黄泽茂谭海军王亚林
Owner CHINA CHENGDA ENG
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