A kind of alkali washing tower online cleaning agent and its preparation and use method

A technology for cleaning chemicals and alkaline washing towers, applied in detergent compositions, detergent compounding agents, chemical instruments and methods, etc. The effect of butter quantity and COD value, reducing accumulation and ensuring stable production

Active Publication Date: 2018-03-23
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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  • A kind of alkali washing tower online cleaning agent and its preparation and use method
  • A kind of alkali washing tower online cleaning agent and its preparation and use method

Examples

Experimental program
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Effect test

Embodiment 1

[0019] Add 30g of sodium fatty acid methyl sulfonate, 5g of dodecyldimethylbenzylammonium chloride, 8g of nonylphenol polyoxyethylene ether, 25g of carbohydrazide, and 32g of deionized water into the reactor. After stirring for 1 hour at room temperature Filter to obtain cleaning agent.

[0020] The above cleaning agent is applied to the ethylene caustic washing tower simulation device. A certain thickness of butter is attached to the caustic cleaning tower tray, and the water contains 500-1000ppm of butter. The online cleaning agent of the caustic cleaning tower is continuously injected into the circulating lye. It is 100ppm, and 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 operates continuously for 8 hours. Calculate the weight of the butter in the lye and measure the thickness of the butter layer on the tray. The amount of butter produced when no inhibitor is added and the thickness o...

Embodiment 2

[0035] Add 20g of sodium fatty acid methyl sulfonate, 10g of dodecyldimethylbenzylammonium chloride, 5g of nonylphenol polyoxyethylene ether, 30g of carbohydrazide, and 35g of deionized water into the reactor. After stirring for 1 hour at room temperature The cleaning agent is filtered and applied to the caustic washing tower of the ethylene plant. After 30 days of adding the cleaning agent, the polymerization inhibition efficiency is 98.3%.

Embodiment 3

[0037] Add 40g of sodium fatty acid methyl sulfonate, 8g of dodecyldimethylbenzylammonium chloride, 10g of nonylphenol polyoxyethylene ether, 28g of carbohydrazide, and 14g of deionized water into the reactor. After stirring for 1 hour at room temperature The cleaning agent is obtained by filtering, and the cleaning agent is applied to the caustic washing tower of the ethylene plant. After 30 days of adding the cleaning agent, the polymerization inhibition efficiency is 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 particularly 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 alkaline washing process, which affects the normal operation of the alkaline washing tower and the alkaline washing effect, and consumes a large amount of lye. At the same time, a large amount of butter easily aggregates and scales to block the distributor and packing in the tower, causing tower blockage This phenomenon shortens the operating cycle of the caustic scrubber; in addition, the waste caustic containing a large amount of butter is discharged outside, which brings difficulties to the operation of downstream processing facilities and affects environmental protection emission indicators. Traditional medicaments can only reduce the oil content and COD val...

Claims

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Application Information

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Patent Type & Authority Patents(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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