低低温烟气处理系统在1 000 MW超超临界机组中的应用探讨

低低温烟气处理系统（Mitsubishi recirculated nonleak type gas-gas heater，MGGH）具有高效的环保性能，已在日本应用于多台火电机组中。介绍了MGGH 的发展概况、工艺原理及特点，并以其在1 000 MW 超超临界机组中应用为例，将其与传统电除尘器+湿法烟气脱硫工艺进行了技术经济比较。结果表明：对于1 000 MW 超超临界机组，采用MGGH 能降低投资费用，提高运行经济性。建议在1 000 MW 超超临界机组中分阶段推广使用MGGH。

Discussion on MGGH Treatment System Application in I 000 MW 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 ...