A treatment system and treatment method for rectification high boiling raffinate in the production of vinyl chloride by calcium carbide method

A processing system and technology of vinyl chloride, applied in chemical instruments and methods, parts of acetylene gas generators, petroleum industry, etc., can solve the problems of high-boiling rectification residual liquid polluting the environment and difficult to handle.

Active Publication Date: 2020-10-27
QINGHAI SALT LAKE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the rectification high boiling raffinate in the rectification process pollutes the environment and is difficult to handle

Method used

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  • A treatment system and treatment method for rectification high boiling raffinate in the production of vinyl chloride by calcium carbide method
  • A treatment system and treatment method for rectification high boiling raffinate in the production of vinyl chloride by calcium carbide method

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Embodiment Construction

[0020] The present invention provides many applicable inventive concepts that can be embodied in numerous specific contexts. The specific examples described in the following embodiments of the present invention are only used as illustrations of specific embodiments of the present invention, and are not intended to limit the scope of the present invention.

[0021] figure 1 It is a vinyl chloride production system, which includes the first section for producing vinyl chloride by the calcium carbide method, the second section for producing ethylene dichloride by chlorination of ethylene, and the third section for producing vinyl chloride by cracking ethylene dichloride in the second section, The by-product high boiling raffinate produced in the first section is processed through the second section and the third section, wherein, the first section (calcium carbide method produces vinyl chloride), which includes an acetylene generator 11 connected in sequence, an acetylene cleanin...

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Abstract

The invention discloses a system and method for treating a high boiling residuary solution in chloroethylene produced by adopting a calcium carbide method. The treatment system comprises a first working section including an acetylene generator (11), an acetylene purifying tower (12), a mixing device (13), a chloroethylene converter (14), a chloroethylene low-boiling tower (15) and a chloroethylene high-boiling tower (16) which are connected in sequence, a second working section including a low-temperature chlorination reactor (21), a wet coarse dichloroethane storage tank (22), a drying tower (23), a high-temperature chlorination reactor (24), a dichloroethane high-boiling tower (25), a vacuum tower (26), a dichloroethane storage tank (27) and a dichloroethane vaporizer (28), a third working section including a cracking furnace (31), a by-product steam heat exchanger (32), a quench tower (33), a hydrogen chloride tower (34) and a chloroethylene tower (35) which are connected in sequence, wherein the low-temperature chlorination reactor (21), the wet coarse dichloroethane storage tank (22) and the drying tower (23) are connected in sequence, the high-temperature chlorination reactor (24), the dichloroethane high-boiling tower (25), the vacuum tower (26), the dichloroethane storage tank (27) and the dichloroethane vaporizer (28) are connected in sequence, and the chloroethylene high-boiling tower (16) is connected with the wet coarse dichloroethane storage tank (22).

Description

technical field [0001] The invention belongs to the field of resource comprehensive utilization of chemical product waste, and in particular relates to a treatment system and treatment method for rectifying high-boiling raffinate in the production of vinyl chloride by a calcium carbide method. Background technique [0002] The preparation of vinyl chloride (VCM) is an important link in the production process of polyvinyl chloride (PVC). In the process of producing vinyl chloride by the calcium carbide method, the dry hydrogen chloride from the hydrogen chloride unit and the acetylene gas from the acetylene unit react to form crude vinyl chloride. The crude vinyl chloride is dehydrated, purified and rectified to obtain polymer grade vinyl chloride. However, the rectification raffinate in the rectification process pollutes the environment and is difficult to handle. [0003] Therefore, there is a need for a treatment system and treatment method capable of effectively treating...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C17/08C07C17/383C07C21/06C07C17/02C07C17/25C07C19/045
CPCC07C17/02C07C17/08C07C17/25C07C17/383C10H21/00C07C21/06C07C19/045
Inventor 李广伍李月仙康金福常喜斌段志强
Owner QINGHAI SALT LAKE IND
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