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Flange sealing gasket for chemical sewage pipe connection

A technology for chemical sewage and flanges, which is applied in the field of sealing material production, can solve the problems of short service life, complex components, strong corrosion, etc., and achieve the effects of being conducive to industrial production, simple preparation method, and strong high temperature resistance.

Inactive Publication Date: 2015-09-23
DONGZHI QUNSHENG CHEM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the complex composition of chemical sewage, strong corrosiveness or high temperature, general flange gaskets cannot be used
In recent years, people have focused on the development of high temperature and corrosion resistant gaskets, but the performance is not ideal and the service life is short

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) 8kg carboxymethyl chitosan and 3kg sodium stearate are fully dissolved in 25kg water to make an aqueous solution;

[0021] (2) add 80kg nitrile rubber, 12kg nanometer glass fiber and 20kg polyethylene glycol in the reactor, stir and heat up to 100-110 ℃ of insulation 2h, obtain material I after cooling down then;

[0022] (3) Add 20kg polyphenylene sulfide, 15kg polyvinyl alcohol and 4kg guar gum in the internal mixer, heat up to 65-70°C and mix for 5min, then add the aqueous solution prepared by material I and step (1), continue to heat up to Mix at 90-95°C for 8 minutes, then add 6kg of kaolin, 5kg of white carbon black and 1kg of anti-aging agent, mix for 5 minutes and send it to the vulcanizer, and make flange gaskets according to the needs of use.

Embodiment 2

[0024] (1) 9kg carboxymethyl chitosan and 4kg sodium stearate are fully dissolved in 28kg water to make an aqueous solution;

[0025] (2) add 85kg nitrile rubber, 13kg nano glass fiber and 22kg polyethylene glycol in the reactor, stir and heat up to 100-110 ℃ of insulation 2h, obtain material I after cooling down then;

[0026] (3) Add 23kg polyphenylene sulfide, 18kg polyvinyl alcohol and 6kg guar gum in the internal mixer, heat up to 65-70°C and mix for 5min, then add the aqueous solution prepared by material I and step (1), continue to heat up to Mix at 90-95°C for 8 minutes, then add 7kg of kaolin, 6kg of white carbon black and 2kg of anti-aging agent, mix for 5 minutes and send it to the vulcanizer, and make flange gaskets according to the needs of use.

Embodiment 3

[0028] (1) 11kg carboxymethyl chitosan and 5kg sodium stearate are fully dissolved in 30kg water to make an aqueous solution;

[0029] (2) Add 90kg nitrile rubber, 15kg nanometer glass fiber and 25kg polyethylene glycol in the reactor, stir and heat up to 100-110 ℃ for 2h, then obtain material I after cooling down;

[0030] (3) Add 25kg polyphenylene sulfide, 20kg polyvinyl alcohol and 7kg guar gum in the internal mixer, heat up to 65-70°C and mix for 5min, then add the aqueous solution prepared by material I and step (1), continue to heat up to Mix at 90-95°C for 8 minutes, then add 9kg of kaolin, 8kg of white carbon black and 3kg of anti-aging agent, mix for 5 minutes and send it to the vulcanizer, and make flange gaskets according to the needs of use.

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PUM

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Abstract

The invention discloses a flange sealing gasket for chemical sewage pipe connection and relates to the technical field of sealing material production. The flange sealing gasket is prepared from raw materials in parts by mass as follows: 80-90 parts of NBR (nitrile butadiene rubber), 12-15 parts of nano glass fibers, 20-25 parts of polyphenylene sulfide, 15-20 parts of polyvinyl alcohol, 10-12 parts of kaolin, 8-11 parts of carboxymethyl chitosan, 5-8 parts of white carbon black, 4-7 parts of guar gum, 3-5 parts of sodium stearate, 1-3 parts of an anti-aging agent, 20-25 parts of polyethylene glycol and 25-30 parts of water. The NBR is modified with the nano glass fibers, multiple aids are used, the comprehensive performance of the sealing gasket is improved, and the prepared sealing gasket is applicable to corrosive chemical sewage at the temperature lower than 198 DEG C and is long in service life.

Description

Technical field: [0001] The invention relates to the technical field of sealing material production, in particular to a flange gasket for chemical sewage pipeline connection. Background technique: [0002] Chemical sewage refers to process wastewater, cooling water, waste washing water, equipment and site washing water and other sewage discharged during the chemical production process. If the sewage is discharged without treatment, it will cause different properties and degrees of pollution to the water body, thereby endangering human health and affecting industrial and agricultural production. [0003] At present, the transportation of chemical sewage pipelines mainly uses plastic pipes with stable performance, and the connections between pipelines are mostly flange connections. When connecting flanges, in order to improve the sealing performance, it is necessary to use gaskets between the flanges. However, due to the complex composition of chemical sewage, strong corrosi...

Claims

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Application Information

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IPC IPC(8): C08L9/02C08L81/02C08L71/08C08L29/04C08L5/08C08L5/00C08K13/02C08K7/14C08K3/34C08K3/04
CPCC08L9/02C08K2201/011C08L2201/08C08L2205/02C08L2205/035
Inventor 陈俊
Owner DONGZHI QUNSHENG CHEM EQUIP CO LTD
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