I. INTRODUCTION
Recently, as the world climate is becoming hotter and hotter, which is harmful to environment for human living, CO2 emission has been aroused serious attention by most of the countries all over the world. In the past year, there were several international meetings to discuss to find the solutions. At that moment, the measure they taken is that each country shares a certain quota of reducing the greenhouse gas of CO2 emission [1]. Being a responsible nation, our government has promised that the emission will decrease from 2005 to 2020 in per unit of GDP. Judging from the structure of the emission of our country, 80% of is generated by firing coal, and over 50% of coal is used to generate electricity power, so, in China over 40% of comes from coal-fired power plant. By the end of 2009, the installed capacity of coal-fired power is up to 74.6% of all installed electricity capacity in China, and thermal generation power has accounted for the country's total generating capacity of 81.67% [2]. From above data, it can be said that the thermal power system undertakes the main task of the gas reducing. Recent years, the renewable energy and nuclear power is explored fast by the power generation groups, but the addition of the renewable energy is far from the increasing demand because of the high speed of the economic development. In 2010, it is estimated that the additional electricity installed capacity is about 8.5GW, but the thermal power adds about 5.5 GW, which accounts for about 65%.