METHODS OF PREVENTING CORROSION OF HEAT-AND-POWER EQUIPMENT OF BOILER AND HEAT SUPPLY SYSTEMS IN AGRICULTURE

Abstract

In the process of operation, the heat and power engineering equipment of boiler stations and heat supply systems are subject to corrosion, which leads to a decrease in the generation of thermal and electric energy and even to emergency shut-downs. The paper presents methods of corrosion control applied at various sections of the heat and power system. Water for heat supply systems is subjected to stabilization treatment with various reagents depending on the composition of impurities and pH. Water is treated with phosphates, phosphonates, various chelating agents, etc. To remove aggressive gases, decarbonators and thermal deaerators are used. The use of floating sealing liquid in storage tanks with hot water protects water from evaporation and excessive aeration. Various coatings and cathodic protection of metal are used to protect tanks from corrosion. It is noted that the conservation of shut-down heat and power equipment allows to avoid downtime corrosion.