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Apparatus and method for recovery of rectification residue effective components and comprehensive treatment of waste gas in polyvinyl alcohol production process

A production process, polyvinyl alcohol technology, applied in separation methods, chemical instruments and methods, and dispersed particle separation, etc., can solve problems such as incompatibility, waste of sodium hydroxide solution, etc., and achieve improved utilization, recycling and treatment devices Simplicity and the effect of reducing production costs

Pending Publication Date: 2019-11-12
INNER MONGOLIA MENGWEI TECH CO LTD +1
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Soluble salt and unreacted sodium hydroxide solution are excluded together, this method causes certain waste to sodium hydroxide solution
The above two treatment methods are not quite in line with the needs of modern green development. In order to change the status quo, it is of great significance to study the recovery of the effective components of the distillation residue and the comprehensive treatment of waste gas in the production of polyvinyl alcohol.

Method used

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  • Apparatus and method for recovery of rectification residue effective components and comprehensive treatment of waste gas in polyvinyl alcohol production process

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Embodiment Construction

[0053]The embodiments of the present invention are described in detail below. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following implementation example.

[0054] Such as figure 1 As shown, the present embodiment first sets the following devices:

[0055] Including residue tank 1, U-shaped pipe 2, condenser 3, vacuum unit 4, distillation tank 5, distillate delivery pump 6, residue pool 7, alkali washing tower 8, alkali circulation pump 9, induced draft fan 10, acetylene Gas scrubber 11, lye replenishment pump 12.

[0056] A jacket for feeding steam is provided outside the residue tank 1, a residue inlet 1a, a residue material outlet 1b, and a residue tank gas phase outlet 1c are arranged on the residue tank 1; a residue tank jacket steam is provided on the jacket. I...

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Abstract

The invention discloses an apparatus and a method for recovery of rectification residue effective components and comprehensive treatment of waste gas in a polyvinyl alcohol production process. According to the present invention, the apparatus comprises a residue tank, a U-shaped pipe, a condenser, a vacuum unit, a distillation groove, a distillate discharge pump, a residue pool, an alkali washingtower, an alkali liquid circulating pump, an induced draft fan, an acetylene gas scrubber and an alkali liquid supplementing pump; the method comprises: light component and heavy component separation,light component cooling, and waste gas alkali washing and water washing; and through the effectively utilization and comprehensive treatment of residue components, the utilization rate of raw materials is increased, the production cost is reduced, the recycling of the waste alkali liquid generated in the synthesis section is achieved, and the pollutant discharge is reduced.

Description

technical field [0001] The invention relates to a method and device for recovering effective components of rectification residues and comprehensive treatment of waste gas in the production process of polyvinyl alcohol, in particular to the efficient recovery of acetic acid in rectification residues by means of vacuum distillation and the utilization of waste A method and a device for realizing the comprehensive treatment of waste gas by lye. Background technique [0002] Polyvinyl alcohol is an important chemical raw material, which can be used in the production of fiber processing, textile pulp, adhesives, architectural coatings, emulsion stabilizers and dispersants, as well as acetal derivatives, degradable films, protective colloids, optical The manufacture of film and other products is widely used in textile, food, medicine, construction, agriculture and other industries. [0003] my country is the world's largest producer of polyvinyl alcohol. In 2017, my country's pol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/72B01D53/78B01D53/96C08F6/00C08F16/06
CPCB01D53/78B01D53/72B01D53/96C08F6/00C08F16/06C08L29/04
Inventor 张东华李瑞忠孙广兵张明洪玉祥袁志鹏韩小龙
Owner INNER MONGOLIA MENGWEI TECH CO LTD
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