Plastic screen cloth for chemical engineering powder screening

A technology of plastic screen mesh and powder material, applied in the field of chemical equipment, can solve the problems of shortening the service life of the screen mesh, introducing impurities into the powder, polluting the powder, etc., and achieving the effect of reducing replacement cost, prolonging service life and long service life.

Inactive Publication Date: 2017-04-26
DONGZHI TIANFU CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the hygroscopicity or corrosiveness of some chemical powders, the powder after moisture absorption is easy to adhere to the screen, which not only blocks the screen holes, but also corrodes the screen, thereby shortening the service life of the screen. Contamination of the sieved powder, introducing impurities into the powder

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Add 5 parts of C5 petroleum resin and 2 parts of ultra-fine polytetrafluoroethylene powder to 25 parts of hard PVC regenerated granules, and heat up to 125-130 °C at a heating rate of 5 °C / min and mix for 30 minutes, then add 3 parts of organic fillers and 0.5 part of nano-zinc oxide, continue to insulate and mix for 15 minutes to obtain material I;

[0024] (2) Add 2 parts of Darmar resin and 1 part of polymethyl methacrylate to 10 parts of saturated polyester resin, and heat up to 120-125 ° C at a heating rate of 5 ° C / min and mix for 15 minutes, then add 3 parts Ceramic micropowder and 1 part of molecular sieve raw powder, continue to keep warm and mix for 15 minutes to obtain material II;

[0025] (3) Add material II, 5 parts of lignocellulose, 3 parts of bamboo powder, 0.5 part of lanolin alcohol and 0.05 part of lanthanum oxide to material I, mix well, and the resulting mixture is processed into a plastic screen by injection molding.

[0026] Preparation of...

Embodiment 2

[0029] (1) Add 5 parts of C5 petroleum resin and 2 parts of ultra-fine polytetrafluoroethylene powder to 25 parts of hard PVC regenerated granules, and heat up to 125-130 °C at a heating rate of 5 °C / min and mix for 30 minutes, then add 5 parts of organic filler and 0.5 part of nano-zinc oxide, continue to keep warm and mix for 15 minutes to obtain material I;

[0030] (2) Add 2 parts of Darmar resin and 2 parts of polymethyl methacrylate to 10 parts of saturated polyester resin, and heat up to 120-125 ° C at a heating rate of 5 ° C / min and mix for 15 minutes, then add 4 parts Ceramic micropowder and 1 part of molecular sieve raw powder, continue to keep warm and mix for 15 minutes to obtain material II;

[0031] (3) Add material II, 8 parts of lignocellulose, 3 parts of bamboo powder, 0.5 part of lanolin alcohol and 0.05 part of lanthanum oxide to material I, mix well, and the resulting mixture is processed into a plastic screen by injection molding.

[0032] Preparation o...

Embodiment 3

[0035] Utilize the plastic sieve made in Example 1 and Example 2 to sieve the same batch of powder, and test its performance, the results are shown in Table 1.

[0036] The performance of table 1 plastic screen of the present invention

[0037] Test items Example 1 screen Example 2 screen Corrosion resistance no corrosion no corrosion wear resistance no wear no wear Vibration resistance No deformation and damage No deformation and damage

[0038] Corrosion resistance test conditions: soak in 3wt% sodium chloride solution, 10wt% sulfuric acid solution, 10wt% sodium hydroxide solution for 24 hours each;

[0039] Wear resistance test conditions: grinding disc Φ122mm, rotating speed 185r / min, hardness 60HRC, surface roughness Ra=0.4μm, grinding time 2h, load 30kg;

[0040] Vibration resistance test conditions: the vibration frequency of the vibration motor is 3000r / min, the excitation force is 50kN, and the vibration time is 48h.

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PUM

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Abstract

The invention discloses a plastic screen cloth for chemical engineering powder screening, and relates to the technical field of chemical equipment. The plastic screen cloth is prepared from, by weight, 20-25 parts of hard PVC regeneration particles, 10-15 parts of saturated polyester resin, 5-10 parts of C5 petroleum resin, 5-10 parts of lignocellulose, 3-6 parts of organic filler, 3-6 parts of bamboo powder, 2-4 parts of gum dammar, 2-4 parts of superfine polytetrafluoroethylene powder, 2-4 parts of ceramic micro powder, 1-2 parts of polymethyl methacrylate, 1-2 parts of molecular sieve raw powder, 0.5-1 part of nanometer zinc oxide, 0.5-1 part of lanonol and 0.05-0.1 part of lanthanum oxide. The screen cloth has the excellent corrosion resistance, wear resistance and vibration resistance and is applicable to screening of powder capable of achieving easy moisture absorption or corrosivity; the service life is long, and the replacement cost of the screen cloth is effectively lowered.

Description

[0001] Technical field: [0002] The invention relates to the technical field of chemical equipment, in particular to a plastic screen for screening chemical powder. [0003] Background technique: [0004] Powder is one of the main forms of chemical materials. In the process of chemical production, it is sometimes necessary to sieve the powder to sieve the powder that meets the particle size requirements for processing. Since the sieve is vibrating to make the powder smaller than the mesh size pass through the sieve, in order to ensure its anti-vibration strength, a stainless steel sieve is used. However, due to the hygroscopicity or corrosiveness of some chemical powders, the powder after moisture absorption is easy to adhere to the screen, which not only blocks the screen holes, but also corrodes the screen, thereby shortening the service life of the screen. Contamination of the sieved powder, introducing impurities into the powder. [0005] Invention content: [0006] Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08L57/02C08L27/18C08L67/00C08L33/12C08L97/02C08L63/00C08L29/04C08L91/00C08L71/02C08L91/06C08K13/04C08K7/10C08K3/22
Inventor 尤新谊
Owner DONGZHI TIANFU CHEM
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