摘要:
A method for cleaning bypass gases of the cement or mineral industry includes cooling down a removed bypass gas from a cement or mineral processing plant to a temperature of between 500° C. and 150° C., and coarsely dedusting the bypass gas, the dust burden being reduced by 30 to 95%. After the dedusting step, the gaseous constituents contained in the partly dedusted bypass gas are reduced in a reducing step. The partly dedusted bypass gas is further finely dedusted. The gaseous constituents reducing step includes at least a catalytic reduction of one or more of nitrogen oxides, hydrocarbons, and carbon monoxide.
摘要:
Improved methods and systems for purifying exhaust gases using regenerative post-combustion systems help reduce operating problems and increase service life of such regenerative post-combustion systems. One such method may involve preheating an exhaust gas to be purified before feeding the exhaust gas into a regenerative post-combustion system. The exhaust gas may be preheated in at least one preheating stage to temperatures between 100° C. and 250° C., for instance, preferably between 100° C. and 200° C., and most preferably between 120° C. and 150° C. Moreover, one regenerative post-combustion system may include a preheating stage, two heat stores, and an oxidation zone disposed between the heat stores for oxidizing harmful constituents present in the exhaust gas.