CALCULATION AND USE OF A RECOVERY BOILER IN DOMESTIC METALLURGY TO INCREASE THE EFFICIENCY OF HEAT AND MASS EXCHANGE PROCESSES

Abstract

Rational use of fuel and energy resources, protection of the environment are among the most important problems facing humanity. High-temperature processes are carried out in technological furnaces (metallurgical, chemical, petrochemical and other branches of industry) with an extremely low coefficient of use of organic fuel (20–40 %). As a result, these productions emit gases whose temperatures sometimes exceed 1000 °C, toxic substances, finely dispersed dust of the used raw materials and other technological wastes that pollute the environment. Therefore, the processing and exploitation of waste from these technological processes is an important task, the implementation of which is possible based on the use of their heat in recovery boilers or with the joint organization of technological and energy processes in energy technology units. The article presents the calculation of the boiler-utilizer, summarized in the table. Selection of optimal equipment parameters for better commissioning, without disrupting the technological process. In general, this equipment has a number of advantages. Namely: simplicity of its execution, reliability in operation, reliability of heat transfer elements and high efficiency of heat and mass exchange processes, relatively low hydraulic resistance, autonomy, etc. The use of secondary energy resources of any kind in technological processes is associated with increasing energy efficiency, improving indicators of technological processes and environmental conditions, that is, technology and energy are combined into a single process. The introduction of a recovery boiler can significantly increase the economic effect of production. The released and received thermal energy can be used as transformations into mechanics, which allows ensuring the autonomy of the energy sources of recovery boiler.