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26
2021
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09
How to clean the packed Pall ring of alkaline washing tower
How to clean the Pall ring packing in the alkaline washing tower, as a metal packing, as long as the surface stains are cleaned, it can also achieve the effect of bright and new. In the alkali washing tower, the middle and lower sections are the alkali washing section, and the upper section is the water washing section. The middle section is concentrated lye, and the lower section is the dilute lye that flows down from the middle section, which is circulated by the dilute alkali circulating pump. Jiangxi Aite introduced the cleaning method of Pall ring packing in alkaline washing tower.
The Pall ring is made of stainless steel with a complex structure and cannot be cleaned manually or mechanically. In addition, furfural coke is insoluble in aqueous solution, and only chemical cleaning methods can be used. The composition and function of the water-based cleaning agent used by the refinery this time.
1. Composition table of metal Pall ring cleaning agent.
1. NaOH has a soaping effect on oils and fats.
2. NaCO, disperses oil and emulsifies, controls PH, and plays a buffering role.
3. NaPO has a comprehensive effect on calcium and magnesium ions in the cleaning solution.
4. Polyethylene glycol octyl phenyl ether disperses and emulsifies oil and tar.
5. Triethanolamine plays a role in osmosis and prevents metal over-corrosion.
This water-based cleaning agent is a common cleaning agent for removing grease, coke, asphaltene and oily carbon scale on steel surfaces. Common solvents and general lye cleaning agents can only remove general metal grease. For mixed scale, such as oil scale, scale iron salt, coke scale iron scale, asphaltene scale, oily carbon iron scale, it cannot be removed. The water-based cleaning agent has obvious effect on removing these mixed-type dirts, and the cleaning agent has obvious effect on the dirt after furfural coking.
Sodium hydroxide has a soaping effect on dirt such as coke scale and oily charcoal, which can quickly dissolve the dirt. NaCO can make the metal cleaning agent maintain a certain alkalinity, so as to neutralize the acidic components in the oily dirt and soap, and at the same time improve the dispersion characteristics and the stability of solid particle suspension, and improve the cleaning ability. After the hydrolysis of NaPO, it has a certain emulsifying ability, and the surface of the metal Pall ring is easily washed by water. Triethanolamine plays a role in penetration, preventing corrosion of metal Pall rings and shortening life.
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