Technological combination method for removing VOCs and odor from polyolefin resin

Abstract

The invention discloses a technological combination method for removing VOCs and odor from polyolefin resin, which is suitable for plastic chemical enterprises. The method comprises the following steps: (1) firstly subjecting hydrocarbons entrained in polyolefin powder discharged from a reactor to flash evaporation in a flash evaporation tank provided with an expansion bag type filter, and coarsely removing VOCs under low pressure; (2) feeding the powder into a specially-made powder heater, heating the powder to a specific temperature, and further removing VOCs in the powder by using a certain flow of purging gas; (3) feeding the powder into a piston flow type degassing bin, and further removing VOCs and deactivate residual catalysts by utilizing hot and wet nitrogen for purging; and (4) in a resin granulation process, extracting residual VOCs and odor in the melt polyolefin through an exhaust section of a barrel of an extruding machine. The technology for removing the VOCs and the odor of the polyolefin resin is unique in process design, simple in equipment, low in investment, simple and easy to operate and environment-friendly in process, the residual VOCs in the polypropylene resin can be removed, and the odor is reduced.

Description

technical field [0001] The invention relates to the technical field of polyolefin powder VOCs removal and resin odor removal, and is a novel combined technical method for solving resin VOCs removal and product odor. Background technique [0002] Polyolefin resin (PP or PE) has the advantages of light density, non-toxic, easy processing, impact resistance, bending resistance and good electrical insulation, and can be used in injection molding, extrusion, blown film, coating, spinning, modification Various industrial and civilian plastic products such as engineering plastics are widely used in the automotive industry, household appliances, electronic products, packaging materials, building materials and furniture. Resin products have become a kind of alternative to steel, wood or other building materials. trend. In the past two decades, the demand for polyolefin products has grown steadily, mainly for the production of woven products, film products, injection molding products...

AI Technical Summary

Problems solved by technology

The steam fluidized bed drying process is complex, with many equipments, a large area, narrow operating temperature range, high control severity, complex operation, high energy consumption, large investment, and a large amount of waste water and waste gas discharge, which brings great harm to environmental protection. high pressure

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