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A system for removing VOC from polypropylene pellets and its application method

A polypropylene granule and control system technology, applied in the direction of coating, etc., can solve the problems of reducing safety and applicability, and achieve the effect of reliable performance, low investment and easy operation

Active Publication Date: 2020-06-16
TIANHUA INST OF CHEM MACHINERY & AUTOMATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Due to various reasons in the production process of polyethylene, polypropylene and other product pellets, volatile organic compounds (volatile matter) remain, which leads to different degrees of odor problems in polypropylene products, which reduces their safety and quality. applicability

Method used

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  • A system for removing VOC from polypropylene pellets and its application method
  • A system for removing VOC from polypropylene pellets and its application method

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Embodiment Construction

[0025] Such as figure 1 As shown, a system for removing VOC from polypropylene pellets, the system includes a roof-mounted devolatilization tower 1 with a weighing control system, a cyclone dust collector 9, a primary heater 6 and a secondary heater 4.

[0026] The top of the roof-type devolatilization tower 1 is provided with a material inlet, and the bottom is provided with a rotary unloading valve 8 with a speed change device; the material inlet is connected with the cyclone dust collector 9; one side of the roof-type devolatilization tower 1 is sequentially arranged from top to bottom There are primary air inlets, secondary air outlets, and cooling air inlets, and the other side is provided with primary air outlets, secondary air inlets, and cooling air outlets from top to bottom; the primary air inlets are passed through the primary heater 6, Circulation fan Ⅱ5 is connected to the secondary air outlet; the cooling air inlet is connected to the ambient air input pipe throu...

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Abstract

The invention relates to a VOC removal system for a polypropylene granular material, wherein the system comprises a roof type devolatilization tower with a weighing control system, a cyclone dust collector, a first-class heater and a second-class heater. A material inlet is arranged at the top of the roof type devolatilization tower, and a rotary discharging valve with a variable speed device is arranged at the bottom of the roof type devolatilization tower; the material inlet is connected with the cyclone dust collector; one side of the roof type devolatilization tower is successively provided with a first-class air inlet, a second-class air outlet and a cooling air inlet successively from top to bottom, and the other side is successively provided with a first-class air outlet, a second-class air inlet and a cooling air outlet successively from top to bottom; the first-class air inlets are connected with the second-class air outlets; the secondary air inlets are connected with the cooling air outlets; the material inlet in the roof type devolatilization tower is provided with a feeding uniform distributor; roof type drying pipes are distributed uniformly below the feeding uniformdistributor; the weighing control system is connected with the feeding uniform distributor and the variable speed device. The invention also discloses an application method of the system. The VOC removal system has the advantages of simple structure, less investment, high stability and good devolatilization effect.

Description

technical field [0001] The invention relates to the technical field of post-treatment of product granules such as polyethylene and polypropylene granules, in particular to a VOC removal system for polypropylene granules and an application method thereof. Background technique [0002] Due to various reasons in the production process of polyethylene, polypropylene and other product pellets, volatile organic compounds (volatile matter) remain, which leads to different degrees of odor problems in polypropylene products, which reduces their safety and quality. applicability. As downstream users have higher and higher requirements for food hygiene and health and safety, especially in terms of automotive special materials and food-grade special materials, the total volatile matter emission of polypropylene materials has become one of the rigid indicators of products. [0003] Finding a method that can effectively reduce the total amount of volatile matter emissions in polypropylen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29B9/16
CPCB29B9/16B29B2009/168
Inventor 赵旭黄帅令永功顾欣郝学军周涛张瑞
Owner TIANHUA INST OF CHEM MACHINERY & AUTOMATION
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