On-line cleaning agent for alkaline washing towers as well as preparation and use methods of cleaning agent

A technology for cleaning agents and alkali washing towers, applied in detergent compositions, detergent compounding agents, chemical instruments and methods, etc., can solve problems such as circulation, tray blockage, and increased pressure difference of tray towers, and achieve reduction Accumulation, ensuring stable production, reducing the amount of butter and the effect of COD value

Active Publication Date: 2016-07-13
天津市瑞德赛恩新材料开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an alkali washing tower online cleaning agent and its preparation and use method, which can overcome the shortcomings of traditional agents that can only reduce the COD value and oil content of the alkali washing tower and cannot solve the problem of alkali washing tower tray clogging, and effectively solve the problem. The technical problems such as the blockage of the alkali washing tower tray and the increase of the pressure difference of the tray tower and the inability to carry out normal alkali circulation have been solved, and the online cleaning of the alkali washing tower has been realized

Method used

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  • On-line cleaning agent for alkaline washing towers as well as preparation and use methods of cleaning agent
  • On-line cleaning agent for alkaline washing towers as well as preparation and use methods of cleaning agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Add 30g sodium fatty acid methyl ester sulfonate, 5g dodecyldimethylbenzyl ammonium chloride, 8g nonylphenol polyoxyethylene ether, 25g carbohydrazide, and 32g deionized water into the reaction kettle, and stir at room temperature for 1 hour Filter to obtain cleaning agent.

[0020] Apply the above-mentioned cleaning agent to the ethylene alkali washing tower simulation device. A certain thickness of butter is attached to the tray of the alkali washing tower. The water contains 500-1000ppm of butter. The agent for online cleaning of the alkali washing tower is continuously injected into the circulating lye. It is 100ppm, wherein the ratio of the injection volume of the strong alkali section, the medium alkali section and the weak alkali section is 1:1:2, the device runs continuously for 8 hours, calculates the weight of butter in the lye, measures the thickness of the tray butter layer, and The amount of butter produced when no inhibitor is added and the thickness of th...

Embodiment 2

[0035] Add 20g of sodium fatty acid methyl ester sulfonate, 10g of dodecyldimethylbenzyl ammonium chloride, 5g of nonylphenol polyoxyethylene ether, 30g of carbohydrazide, and 35g of deionized water into the reaction kettle, and stir for 1 hour at room temperature The cleaning agent was obtained by filtration, and the cleaning agent was applied to the alkali washing tower of the ethylene plant. After adding the cleaning agent for 30 days, the polymerization inhibition efficiency was 98.3%.

Embodiment 3

[0037] Add 40g sodium fatty acid methyl ester sulfonate, 8g dodecyldimethylbenzyl ammonium chloride, 10g nonylphenol polyoxyethylene ether, 28g carbohydrazide, and 14g deionized water into the reaction kettle, and stir at room temperature for 1 hour The cleaning agent was obtained by filtration, and the cleaning agent was applied to the alkali washing tower of the ethylene plant. After adding the cleaning agent for 30 days, the polymerization inhibition efficiency was 97.8%.

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Abstract

The invention relates to the technical field of ethylene and provides an on-line cleaning agent for alkaline washing towers as well as preparation and use methods of the cleaning agent. The cleaning agent is prepared from components in percentage by weight as follows: 20%-40% of a dispersing agent, 5%-10% of a stripping agent, 5%-10% of a penetrant, 25%-30% of an inhibitor and the balance of a solvent. The dispersing agent, the stripping agent, the penetrant, the inhibitor and the solvent are added to a reaction kettle in percentage by weight, stirred at the normal temperature and evenly mixed, and the cleaning agent is obtained through filtration. The cleaning agent is applied to the alkaline washing towers, stable production by devices can be guaranteed, further accumulation of scale in the alkaline washing towers is prevented, tower tray polymers are reduced, the blockage phenomenon of the alkaline washing towers can be eliminated by the aid of the cleaning agent for the alkaline washing towers, blockage of tower trays of new towers can be avoided, the butter amount and the COD value can be decreased, and accumulation of scale in old towers and the quantity of tower tray polymers can be reduced, so that real-time on-line cleaning of the alkaline washing towers can be realized.

Description

technical field [0001] The invention belongs to the technical field of ethylene, and in particular relates to an on-line cleaning agent for an alkali washing tower and a preparation and use method thereof. Background technique [0002] The pyrolysis gas of the ethylene plant will produce a large amount of butter during the alkali cleaning process, which will affect the normal operation of the alkali washing tower and the effect of alkali washing, and consume a large amount of lye. phenomenon, which shortens the operation period of the alkali washing tower; in addition, the waste alkali containing a large amount of butter is discharged, which brings difficulties to the operation of downstream treatment facilities and affects environmental protection emission indicators. Traditional chemicals can only reduce the oil content and COD value of each section of the alkali washing system, but cannot clean the polymer on the tray of the alkali washing tower, so it is impossible to re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11D1/86C11D3/26C11D1/83C11D3/60C11D3/30C11D3/33C11D1/37C11D3/37C11D3/28C11D3/04C11D3/20
CPCC11D1/04C11D1/22C11D1/28C11D1/37C11D1/62C11D1/721C11D1/722C11D1/83C11D1/86C11D3/046C11D3/2044C11D3/2086C11D3/26C11D3/28C11D3/30C11D3/33C11D3/3707
Inventor 王娇王晓娜
Owner 天津市瑞德赛恩新材料开发有限公司
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