Method of shutdown cleaning of industrial naphthalene distillation device

Abstract

The invention discloses a method of shutdown cleaning of an industrial naphthalene distillation device. The method includes the steps that carbolic oil is added to a first reflux tank after the industrial naphthalene distillation device is shut down, the carbolic oil is transported to a primary tower through a first transfer pump, a second transfer pump is started when the primary tower reaches acertain liquid level, the primary tower is cleaned circularly, a third transfer pump is started, the carbolic oil is transported into a rectifying tower, a forth transfer pump is started when the rectifying tower reaches a certain liquid level, the rectifying tower is cleaned circularly, and the cleaned carbolic oil is transported to a designed storage tank for recycling after a certain period oftime of cycle cleaning of the rectifying tower. At the beginning of the construction of the industrial naphthalene distillation device, the residual carbolic oil in the industrial naphthalene distillation device will enter a second reflux tank, resulting in an unqualified quality of the industrial naphthalene. The unqualified industrial naphthalene will be transported to a naphthalene oil distilling tank. After the quality of the industrial naphthalene is qualified, the qualified industrial naphthalene will be transported to an industrial naphthalene storage tank. The method can reduce the conveying time of cleaned materials, achieve good cleaning effect and save resource cost.

Description

technical field [0001] The invention relates to the technical field of equipment maintenance, in particular to a method for shutting down and cleaning an industrial naphthalene distillation device. Background technique [0002] In the tar processing industry, the industrial naphthalene distillation unit needs to be shut down for cleaning on a regular basis, mainly to clean the accumulated material, slag, coke and other substances from the long-term operation of the equipment. Currently, the commonly used cleaning agent for the industrial naphthalene distillation unit is dephenolized phenol oil. , dephenolized phenolic oil is a product sold externally and can be recycled. However, when cleaning the industrial naphthalene distillation unit, the dephenolized phenolic oil needs to be equipped with a dephenolized phenolic oil pump to complete the cleaning work. The general equipment selection of the dephenolized phenolic oil pump is The type is small, and the time to transport th...

AI Technical Summary

Problems solved by technology

[0002] In the tar processing industry, the industrial naphthalene distillation unit needs to be shut down for cleaning on a regular basis, mainly to clean the accumulated material, slag, coke and other substances from the long-term operation of the equipment. Currently, the commonly used cleaning agent for the industrial naphthalene distillation unit is dephenolized phenol oil. , dephenolized phenolic oil is a product sold externally and can be recycled. However, when cleaning the industrial naphthalene distillation unit, the dephenolized phenolic oil needs to be equipped with a dephenolized phenolic oil pump to complete the cleaning work. The general equipment selection of the dephenolized phenolic oil pump is The type is small, and the time to transport the dephenolized phenolic oil is relatively long. The recovered dephenolized phenolic oil needs to be processed repeatedly before it can be used again, which increases the energy consumption cost and auxiliary material cost required for processing.

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