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A kind of crushing equipment and crushing method of polytetrafluoroethylene resin by suspension method

A technology of polytetrafluoroethylene and suspension method, which is applied in the direction of grain processing, etc., can solve the problems of uneven particle shape and particle size distribution, inconvenient processing, high energy consumption, etc., to achieve easy disassembly and cleaning, convenient replacement of parts, and low energy consumption Effect

Active Publication Date: 2017-02-01
ZHONGHAO CHENGUANG RES INST OF CHEMICALINDUSTRY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its disadvantage is that the particle shape and particle size distribution of the product are not uniform, it is not convenient for subsequent processing, and it has high energy consumption and high noise.

Method used

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  • A kind of crushing equipment and crushing method of polytetrafluoroethylene resin by suspension method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The pulverization system includes water treatment storage tank, pulverization pump unit, storage tank to be dried, and drying system connected in sequence; the pulverization pump unit uses 1 pulverization pump, and according to the order of feeding, the stages of grinding discs used are I, Class II and III.

[0031] Preparation of polytetrafluoroethylene resin by suspension polymerization. After polymerization and feeding, add deionized water into the water treatment storage tank according to the water-to-material ratio of 2:1 by mass ratio, start the water treatment storage tank to stir for water treatment, and wait for the water treatment temperature to pass through 40 minutes at 80°C, that is, Cool down the material. When the temperature of the material drops to 20°C, turn on the power of a single crushing pump for crushing. The crushed material is transported to the storage tank to be dried for water treatment again. The ratio of water to material is 2:1, at 60°C S...

Embodiment 2

[0033] The pulverization system includes water treatment storage tank, pulverization pump unit, storage tank to be dried and drying system connected in sequence; the pulverization pump unit includes 4 pulverization pumps connected in series. The millstones of the second crushing pump are all grade I, the millstones of the second crushing pump are grades I, II, and II, the millstones of the third crushing pump are grades II, III, and III, and the three millstones of the fourth crushing pump are all grade III.

[0034] Preparation of polytetrafluoroethylene resin by suspension polymerization. After polymerization and feeding, add deionized water into the water treatment storage tank according to the water-to-material mass ratio of 2:1, start the water treatment storage tank to stir for water treatment, and after the water treatment temperature reaches 40 minutes at 80 ° C, the material is Cool down, when the temperature of the material drops to 20°C, turn on the power supply of ...

Embodiment 3

[0036] see figure 1 , the crushing system includes a water treatment storage tank, a crushing pump unit, a storage tank to be dried, and a drying system connected in sequence; the crushing pump unit includes 8 crushing pumps connected in series, and each crushing pump is equipped with three grinding discs; according to the feed In sequence, the grinding discs of the first crushing pump are all grade I, the grinding discs of the second crushing pump are grades I, II, and II, the grinding discs of the third crushing pump are grades II, III, and III, and the grinding discs of the last five crushing pumps are The grinding discs are all grade III.

[0037] Preparation of polytetrafluoroethylene resin by suspension polymerization. After polymerization and feeding, add deionized water into the water treatment storage tank according to the water-to-material mass ratio of 2:1, start the water treatment storage tank to stir for water treatment, and wait until the water treatment temper...

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Abstract

The invention provides crushing equipment of polytetrafluoroethylene resin with a suspension method. The crushing equipment comprises a water treatment storage tank, a crushing pump assembly, a to-be-dried storage tank and a drying system, which are sequentially connected with one another, wherein the crushing pump assembly comprises 2-8 crushing pumps which are connected with one another in series. The invention also provides a method for crushing the polytetrafluoroethylene resin by using the crushing equipment. Each crushing pump provided by the invention can be provided with 1-6 groups of millstones; and the millstones are composed of stator and rotor grinding teeth plates, which are nested with one another, and can be divided into three grades I (coarse), II (medium) and III (fine) according to the clearance sizes of stator separating disc grinding teeth and turntable grinding teeth. Materials with different particle sizes can be conveniently and directly obtained by changing the quantity and the grades of the millstones of each crushing pump and the quantity of the crushing pumps which are connected with one another in series.

Description

technical field [0001] The invention belongs to the field of crushing equipment, and in particular relates to crushing equipment and a crushing method for fluoropolymers. Background technique [0002] Polytetrafluoroethylene is an engineering plastic with excellent performance, commonly known as "Plastic King", which is polymerized from tetrafluoroethylene monomer. It is resistant to aging, high and low temperature, has excellent corrosion resistance, good electrical insulation and good lubricity, and is widely used in various industries. [0003] Plunkett of DuPont in the United States first synthesized polytetrafluoroethylene in 1938. With the development of synthetic technology, today, the polymerization methods of PTFE mainly include suspension polymerization and dispersion polymerization, and the obtained resins are called suspension resin and dispersion resin respectively. Particles with filamentous suspensions are very difficult to process with this coarse polymer b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B02C21/00C08F14/26C08F2/18
CPCB02C7/04B02C21/00C08F2/18C08F14/26
Inventor 段绍书黄伟槟金永良蔡勇王波叶飞杨
Owner ZHONGHAO CHENGUANG RES INST OF CHEMICALINDUSTRY CO LTD