Discussion on MGGH Treatment System Application in 1000MW USC Unit

Mitsubishi recirculated nonleak type gas-gas heater(MGGH)is of high-efficient environment protection property and has been used in many fossil fuel power plants in Japan in recent years.The paper explains MGGH's development brief,process principles and features,takes its engineering application for a 1000MW USC unit as an example,compares it to the traditional ESP+FGD technically and economically.The compared results indicates that MGGH can reduce investment cost and increase operation economy for a 1000MW USC unit.The comment is to popularize MGGH in 1000MW USC units in stages.