METHOD FOR CHEMICAL CLEANING OF HYDRAULIC CHANNEL INNER SURFACE OF WATER HEATING BOILER Russian patent published in 2024 - IPC F28G9/00 

FIELD: thermal power engineering.

SUBSTANCE: invention relates in particular to methods for cleaning the hydraulic tract of a water heating boiler from internal contaminants during the operational period. Method for chemical cleaning of the internal surface of the hydraulic circuit of a water heating boiler, moreover, flanged pipes with plugs are cut into the hydraulic path of the water-heating boiler, designed to provide a four-way circulation circuit of the water-chemical solution. The installation for chemical cleaning of the water-heating boiler contains a frame, inside of which centrifugal cantilever pumps for chemical cleaning are mounted, connected through flanged pipes and pipelines to the hydraulic path of a water-heating boiler, a tank for the preparation of water-chemical solutions, communicating using pipelines through plunger metering pumps with a circulation circuit of the water-chemical solution in the hydraulic path of the water-heating boiler. A downward circulation riser is installed, formed by a pipe on the foundation support, creating conditions for the circulation of water - chemical solution according to a four-pass scheme from bottom to top, removal to the atmosphere of gases formed as a result of chemical reactions, closing the circulation circuits according to a four-pass scheme, dosing water - chemical solutions into the circulation circuits, protecting the circulation circuit from overflow, as well as hydrostatic backpressure of the water volume of the water heating system boiler with the ability to prevent the formation of gas bags in dead-end areas of circulation circuits.

EFFECT: increasing the compactness of the cleaning installation, increasing the technical efficiency of cleaning and operational reliability.

6 cl, 4 dwg