METHOD FOR RECOVERING HEAT ENERGY IN EQUIPMENT FOR MANUFACTURING SULFURIC ACID

摘要

PURPOSE:To save heat energy by adding a liq. refrigerant to sulfuric acid in a manufacturing stage to cool the sulfuric acid and to vaporize the refrigerant, introducing the vaporized refrigerant into a turbine to drive a power generator, liquefying the refrigerant, and circulating and using it. CONSTITUTION:Concd. sulfuric acid obtd. in an absorption tower 1 is fed at a high temp. to a cooler 4 through a feeding pipe 6, and a refrigerant having stability to sulfuric acid such as a satd. hydrocarbon refrigerant is fed to the cooler 4 through a refrigerant returning pipe 24. The cooled concd. sulfuric acid is taken out of a takeout pipe 20, and the refrigerant vaporized by absorbing heat of the concd. sulfuric acid is fed to a turbine 21 through a transfer pipe 23 to drive a power generator 22. The refrigerant is then introduced into a condenser 25, condensed, passed through the pipe 24 with a pump 26, and reutilized.