Closed-cycle recycling method for solvent in PVC foaming board production

A closed-loop, foamed board technology, applied in separation methods, chemical instruments and methods, gas treatment, etc., can solve problems such as pollution, and achieve the effects of significant economic benefits, high recovery efficiency, and quick results.

Inactive Publication Date: 2016-06-01
TIANWEI CHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology helps prevent harm from burning out chemical substances during manufacturing processes that use plastic materials such as vinyl chloride (PVC). By utilizing this new way it allows us to recover these compounds back into their original form after they have been released or discarded without causing any health hazard concerns over them.

Problems solved by technology

This patented technical problem addressed by this patents relates to how much harmful chemical substances are released when producing polyvinyl chloride (PVC) foams with high levels of residual monomethoxy-methane or other compounds that may cause environmental concerns such as ozone depletion issues.

Method used

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  • Closed-cycle recycling method for solvent in PVC foaming board production

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Embodiment Construction

[0017] Refer to attached figure 1 , a method for solvent closed-circuit recycling in the production of PVC foam boards, comprising sequentially connected hot air circulation oven 1, surface condenser 15, centrifugal fan 14, preprocessor I5, preprocessor II6, adsorber A7, adsorption B8, adsorber C10, compressor 13, condenser 12, recovery solvent storage tank 11, a filter 4 is installed at the entrance of the hot air circulation oven 1, and a heater 3, deflector 2, and damper 17 are arranged inside the hot air circulation oven , automatic conveying trolley 18, main blower 16; the exhaust gas from the top of the foaming machine enters the hot air circulation oven together with the air under the drive of the main blower, and is filtered through the filter in turn, heated by the heater, deflected by the deflector, and enters Air door, and heat up the foamed sheet on the automatic conveying car, evaporate the organic solvent in the sheet and send it out of the hot air circulation oven

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Abstract

The invention discloses a closed-cycle recycling method for a solvent in PVC foaming board production. A hot air circulating oven, a surface condenser, a centrifugal fan, a pretreater I, a pretreater II, an adsorber A, an adsorber B, an adsorber C, a compressor, a condenser and a recovered solvent storage tank which are connected in sequence are involved in the method, a filter is arranged at an inlet of the hot air circulating oven, and a heater, a flow guide plate, an air door, an automatic conveying trolley and a main fan are arranged inside the hot air circulating oven. By recycling the organic solvent used in the PVC foaming process and removing the organic solvent remaining in foaming boards, the fire resistance of the foaming boards is guaranteed, and the problem that in present domestic PVC foaming board production processes, organic solvents are difficult to recycle and pollute the environment is solved.

Description

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Claims

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Application Information

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Owner TIANWEI CHEM
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