Cleaning method for heat exchanger of heating power company

Abstract

The invention discloses a cleaning method for a heat exchanger of a heating power company. A cleaning system is adopted for cleaning a heat exchange sheet of the heat exchanger and comprises a cleaning tank, a circulation pump and a heater which are sequentially connected through a pipeline. A sampling pipe is arranged at the position, on the downstream portion of the cleaning tank, of the pipeline. The cleaning method sequentially comprises the following steps of S100 water washing, S200 alkali washing, S300 water washing, S400 acid pickling, S500 water washing, S600 passivation and S700 water washing. The heat exchange plate sheet is cleaned through the chemical cleaning method, the cleaned heat exchange plate sheet is bright as a new one, and the original heat exchange capacity of the heat exchanger is restored; and the plate sheet is cleaned through organic acid sulfamic acid, the sulfamic acid is weak acid, it is found that the effect is the best when a sulfamic acid adding corrosion inhibitor is selected as cleaning liquid through trial and errors, the prominent cleaning effect is achieved compared with other reagents, and the corrosion of the cleaning liquid to the plate sheet can be reduced.

Description

technical field [0001] The invention relates to a heat exchanger of a thermal company, in particular to a cleaning method for a heat exchanger of a thermal company, which is used for cleaning the heat exchange fins of the heat exchanger. Background technique [0002] Plate heat exchangers are widely used in the heating industry due to their light weight, small footprint, low investment, high heat exchange efficiency, and flexible assembly. All heat exchange units in the heat company use plate heat exchangers Convective heat exchange is carried out, but due to the small cross-section of the plate heat exchanger, if the circulating water quality is unqualified, the heat exchange plates will be fouled and blocked, which will reduce the heat exchange efficiency of the plate heat exchanger, thus affecting the equipment. safety and normal use by the user. In the past, the plates were washed and cleaned with tap water. This cleaning method can only remove the sediment and suspende...

AI Technical Summary

Problems solved by technology

[0002] Plate heat exchangers are widely used in the heating industry due to their light weight, small footprint, low investment, high heat exchange efficiency, and flexible assembly. All heat exchange units in the heat company use plate heat exchangers Convective heat exchange is carried out, but due to the small cross-section of the plate heat exchanger, if the circulating water quality is unqualified, the heat exchange plates will be fouled and blocked, which will reduce the heat exchange efficiency of the plate heat exchanger, thus affecting the equipment. Safety and normal use by users

In the past, tap water was used to wash and clean the plates. This cleaning method can only remove the sediment and suspended solids on the surface of the heat exchange plates, but cannot remove the hard scale adhered to the heat exchange plates. The cleaning effect is not ideal.

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