Reboiler cleaning agent and cleaning method thereof

Abstract

A detergent for reboiler and cleaning method thereof are disclosed, which pertains to the detergent field. The detergent comprises raw materials with weight proportion as follows: alpha-methylnaphthanlene 5-10 parts; beta-methylnaphthanlene 50-70 parts; naphthalin 2-15 parts; heavy aromatic hydrocarbon solvent 10-35 parts. Advantages are that organic scale formation formed in the reboiler because of decomposition of heat conductive oil due to long-term heating or condensation is effectively removed; contaminant release process is simple; detergent after contaminant release can be recycled and reused, which is economic and environmental protective.

Description

technical field [0001] The invention belongs to the technical field of cleaning agents, and in particular relates to a cleaning agent for a reboiler. Background technique [0002] With the rapid development of science and technology, in the process of synthesizing, preparing and refining corresponding products in petroleum, chemical, pharmaceutical and dye industries, more and more complex equipment are required, for example, large heat exchangers , condenser, reboiler, etc. In the tube side and shell side of these devices, especially the dirt and organic fouling in the shell side, manual cleaning is very difficult. If these scales are not removed, the heat transfer efficiency will be affected and the energy consumption will be increased. In severe cases, normal production will be affected. This requires a special cleaning agent for cleaning. [0003] In the prior art, solvents and compound solvents are used to clean condensers and heat exchangers; chemical reagents and s...

AI Technical Summary

Problems solved by technology

Taking methylnaphthalene as an example, there are α-methylnaphthalene and β-methylnaphthalene. Although the molecular weight of the isomers is the same and the difference in boiling point is less than 2°C, their chemical properties are very different, which leads to complex chemical reactions.

It is precisely because of the above reasons that after long-term use of the reboiler with heat transfer oil as the heating medium, fouling will occur on the wall of the reboiler shell side tube, and the organic scaling produced by the thermal decomposition or polycondensation of the heat transfer oil for a long time It has strong stubbornness, and due to the structural characteristics of the reboiler itself, once the dirt is generated, it is very difficult to clean and remove the scale. It is almost impossible to use solvents, compound solvents, and descaling agents in the prior art.

[0009] For the cleaning of the reboiler, chemical cleaning or high-pressure water cleaning are mostly used at present. Due to the gap between the calculated equipment volume and the actual volume of the former, it is easy to cause the dosage of cleaning agents to fail to meet the actual demand and not reach the expected value. Cleaning effect; the latter uses high-pressure water cleaning. Due to the high cleaning water pressure, the tubes are easily damaged (breakdown), and the cleaning effect is not ideal, resulting in high cleaning frequency, which seriously affects the safety and stability of the device and the smooth long-term production. conduct

Up to now, the industry has always been plagued by the problem of cleaning the reboiler, and is also actively exploring and trying, but so far there is no ideal cleaning agent

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