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Method for recycling waste plastic for pipeline anticorrosion

A technology of waste plastics and pipes, which is applied in the field of reuse of steel pipe 3LPE anti-corrosion waste plastics, can solve the problems of unavoidable waste PE scraps and powder materials, affect the factory environment, and occupy a large storage area, so as to achieve good promotion and application value and eliminate environmental pollution , cost-saving effect

Active Publication Date: 2013-12-18
PANYU ZHUJIANG STEEL PIPE LIANYUNGANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the external anti-corrosion technology of 3PE steel pipes is very mature at home and abroad. During the production process, each order must be evaluated according to the technical standards. Peeling and re-coating will inevitably produce a large amount of PE coating waste; secondly, there must be a lead pipe every time the machine is turned on, and there must be a jacking pipe when it is shut down. A large amount of waste PE coating will definitely be generated on the lead pipe and the jacking pipe ; Third, before starting the official production each time, the heating and plasticizing time in the plastic machine is too long, and the overheated and melted materials are discharged, which inevitably produces a lot of massive waste; Fourth, the end of the coated pipe is for protection. The quality of the butt weld requires stripping or grinding off 100-150mm, so it is inevitable to produce waste PE scraps and powder materials again; the waste plastics generated in the above process, first, occupy a large space for storage, affecting the factory environment, and second, waste of resources Great waste

Method used

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  • Method for recycling waste plastic for pipeline anticorrosion
  • Method for recycling waste plastic for pipeline anticorrosion
  • Method for recycling waste plastic for pipeline anticorrosion

Examples

Experimental program
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Effect test

Embodiment 1

[0015] Use large pieces of recycled granulated materials that have been cut and crushed: remove the epoxy layer and adhesive, cut them into thin slices and strips with woodworking saws, or initially cut large pieces of waste with mechanical knives; then use powerful special The plastic crusher is crushed into pieces with a size of 1cm*1cm or less than 1cm; and then cleaned with automatic cleaning equipment to remove harmful impurities such as sand and metal inside; then, after drying, add the required additives and Additives, specifically: polyethylene resin: antioxidant 1010: PE wax = 80: 18.8: 0.2: 1.0, after batching, use special plastic granulation equipment to plasticize, granulate, cool, and pelletize to make Products, packaged and classified for 3PE anti-corrosion. After testing: density 0.958g / cm 3 ; Melt flow rate 0.21 g / 10min; Oxidation induction period 30.8min; 100 ℃, 2400h heat aging 27%. Meet the technical standard requirements of SY / T0413-2002 polyethylene anti...

Embodiment 2

[0017] Use the pipe end peeling strips stripped of the epoxy powder layer and adhesive and recycled granulated material after crushing the leftovers: strip off the epoxy layer and adhesive, cut into thin slices or strips with a woodworking saw, or Preliminary cutting of large pieces of waste with mechanical knives; then use a powerful special plastic crusher to crush into pieces within 1cm*1cm or within 1cm; then clean with automatic cleaning equipment to remove harmful impurities such as sand and metal inside ; Then, after drying, add the required additives and auxiliary agents according to the needs of the product, specifically: polyethylene resin: antioxidant 1010: PE wax = 75: 23.8: 0.2: 1.0, after batching, it is made of special plastic again The granulation equipment is then plasticized, granulated, cooled, and pelletized to make products, packaged and classified for 3PE anti-corrosion. After testing: density 0.960g / cm3; melt flow rate 0.2 g / 10min; oxidation induction pe...

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Abstract

The invention discloses a method for recycling waste plastic for pipeline anticorrosion, belonging to the technical field of high molecular materials applied to steel tube anticorrosion. The method is characterized by comprising the following steps: crushing; cleaning; re-proportioning anticorrosive 3PE (Poly Ethylene) waste plastic of a pipeline 3, namely the ratio of regenerating prilling materials: resin: an antioxygen: a processing agent=( is (80-70):(18-15):0.2:1.0. After prilling, the quality of the waste plastic satisfies the demand of technical standard (SY / T0413-2002) on the polyethylene anticorrosive layer of the buried steel pipeline, and the waste plastic can be reused to 3PE anticorrosion. The environmental pollution is eliminated and the environment problem is solved. The cost of raw materials for pipeline anticorrosion is saved, the utilization ratio of resources is improved, and the domestic blank is filled. The method belongs to circular economy, obtains good economic and social benefits, and has better popularization and application valves.

Description

technical field [0001] The technical field of polymer material technology of the present invention specifically relates to a method for reusing steel pipe 3LPE anti-corrosion waste plastics. Background technique [0002] At present, the external anti-corrosion technology of 3PE steel pipes is very mature at home and abroad. During the production process, each order must be evaluated according to the technical standards. Peel off the skin and re-coat, so that a large amount of PE coating waste will inevitably be produced; secondly, there must be a lead pipe every time the machine is turned on, and there must be a jacking pipe when the machine is shut down. ; Third, before starting the official production each time, the heating and plasticizing time in the plastic machine is too long, and the overheated and melted materials are discharged, which inevitably produces a lot of massive waste; Fourth, the end of the coated pipe is for protection The quality of the butt weld requir...

Claims

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Application Information

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IPC IPC(8): B29B9/02B29B17/02
CPCY02W30/62
Inventor 龚建文
Owner PANYU ZHUJIANG STEEL PIPE LIANYUNGANG
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