Mixed type flue gas reheating system suitable for wet type flue gas purification process of high-cold region

The invention discloses a mixed type flue gas reheating system suitable for a wet type flue gas purification process of a high-cold area and relates to a flue gas reheating system, aiming to solve the problem that the purposes of purifying flue gas and effectively warming up are difficult to achieve under the condition of guaranteeing higher desulfuration efficiency by the prior flue gas reheating device because raw flue gas temperature is lower. The invention adopts the technical scheme that after high-temperature flue gas is subjected to dust removal through a high-temperature dust remover, the high-temperature flue gas is sent into a uniform mixing heat exchange device through a draught fan or directly to be directly mixed with purified flue gas so as to heat the purified flue gas; then the high-temperature flue gas is led out from a regulation valve and enters a gas-gas heat exchanger; cold air enters the heat exchanger through an air fan to exchange heat with the high-temperature flue gas, and obtained high-temperature air is sent into the uniform mixing heat exchange device to heat the purified flue gas; and the high-temperature flue gas or air directly exchanges heat with purified flue gas in the uniform mixing heat exchange device so as to realize the rise of the flue gas temperature and the evaporation phase change of micro liquid drops in saturated wet-containing flue gas.