A cleaning method of primary cooler and purification system of primary cooler

Abstract

The application provides a method for cleaning a primary cooler and a purification system for the primary cooler, which belong to the technical field of cleaning the primary cooler. The cleaning method of the primary cooler includes purging the upper section of the primary cooler and the lower section of the primary cooler with steam respectively. After the steam is purged, use ammonia water to clean the upper section of the primary cooler and the lower section of the primary cooler respectively. First use steam to purge and heat the upper section of the primary cooler and the lower section of the primary cooler, and some impurities will be taken away by the steam, so that the gap between the cooling water pipes in the upper section of the primary cooler and the lower section of the primary cooler will be widened. The cleaning of the upper section of the cooler and the lower section of the primary cooler is conducive to the unimpeded flow of ammonia water in the upper section of the primary cooler and the lower section of the primary cooler and the removal of impurities. At the same time, the impurities that are heated and humidified will gradually soften and be more easily washed and taken away by ammonia water. The two methods of steam purging and ammonia water cleaning cooperate with each other to reduce the resistance of the upper section of the primary cooler and the lower section of the primary cooler, and improve the cleaning effect of the primary cooler.

Description

technical field [0001] The present application relates to the technical field of primary cooler cleaning, and in particular, to a primary cooler cleaning method and a primary cooler purification system. Background technique [0002] Primary cooler is a kind of cooling equipment used to cool hot gas in chemical production. For example, the condensing blasting process uses a high-efficiency horizontal tube cooler, which can be used to cool the gas from 80 to 90 °C to 21 to 23 °C, so that most of the naphthalene in the gas is removed by initial cooling. Make sure that the subsequent equipment is not blocked. [0003] When the temperature of the gas entering the upper section of the primary cooler is high, more heavy tar will be brought into the light tar. Using this part of the tar to circulate naphthalene to wash naphthalene is very likely to cause blockage of the cooling water pipe gap inside the primary cooler, and the gas temperature will drop. If not, the dissolving and ...

AI Technical Summary

Problems solved by technology

[0003] When the temperature of the gas entering the upper section of the primary cooler is high, more heavy tar will be brought into the light tar. Using this part of tar to wash naphthalene in a cycle will easily cause the gap of the cooling water pipe inside the primary cooler to be blocked, and the temperature of the gas will drop. If it does not come down, the ability of light tar to dissolve and absorb naphthalene will decrease, and the naphthalene content after the primary cooler will increase, resulting in a vicious cycle of high gas temperature and high naphthalene content in the gas, which is not conducive to the purification of subsequent sections

[0004] Therefore, after the horizontal tube primary cooler is put into use for a period of time, a large amount of impurities will accumulate in the gaps of the internal cooling water pipes, which will increase the resistance of the primary cooler and need to be reversed and cleaned

[0005] However, when using emulsion and condensate to clean the upper section of the primary cooler and the lower section of the primary cooler, a large amount of impurities will enter the emulsion and condensate, especially the condensate containing a large amount of impurities after cleaning in the lower section of the primary cooler. It will irritate the condensate entering the lower condensate tank and pollute the condensate in the lower condensate tank, resulting in poor quality of condensate and reduced cleaning ability. In severe cases, it will also affect the normal operation of the primary cooler

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