METHOD OF COKE GAS HYDROGEN SULFIDE ABSORPTION AUTOMATIC CONTROL Russian patent published in 1994 - IPC

FIELD: chemical industry. SUBSTANCE: hydrogen sulfide is being absorbed from coke gas in absorber by absorbing solution, that is afterwards regenerated. Ammonia is fed in coke gas before absorber, maintaining given ratio of Ammonia and hydrogen sulfide in coke gas. Method provides for stabilization of Ammonia and hydrogen sulfide contents ratio in subjected to purification coke gas by changing of Ammonia volume fed into going to absorber coke gas with simultaneous stabilization of Ammonia content in hydrogen sulfide unsaturated absorbing solution by changing of Ammonia volume fed into regenerator. New aspect of the method is measurement of coke gas consumption and its temperature before absorber and consumption and concentration of Ammonia after absorber, determination of Ammonia mass consumption in coke gas before and after absorber, calculation of their difference and regulation of Ammonia volume feeding for regeneration with adjustment of temperature of unpurified coke gas, regenerated absorbing solution temperature measurement and its regulation inversely with unpurified coke gas temperature by change of cold water feeding into refrigerate. EFFECT: increased productivity. 1 dwg