BLOWER FOR WASTE HEAT RECOVERER

PURPOSE:To reduce the loss of heat by blowing by lessening the amount of blow to a minimum by a method in which the concentration of acids in steam as working medium to be generated from a waste heat recoverer is measured and the blow of the waste heat recoverer is controlled on the basis of the acid concentration. CONSTITUTION:A working medium is preheated by a preheating tube 4, sent to a steam cylinder 1, and heated by a heating tube 3 to steam which is in turn sent through a pipe 5 to a turbine 6. The steam coming into the turbine serves to turn the turbine 6 and is sent to a condenser 7 where it is liquefied by cooling, and the liquid is sent back to the preheating tube 4 through a pipe 9. The steam is passed through a base valve 13 for sampling and the pipe 12 from the pipe 5 and extracted into an analyzer 11 where the concentration of acids in the steam is measured. The results of measurement are converted into an electrical signal by a converter 14 and sent through a signal cable 15 to a blow amount regulator 16. A signal of blow amount is obtained and transmitted to E/P converter to control the blow control valve 18.