Power plant flue gas white smoke elimination system based on heat pipe heat exchange technology

Abstract

The invention discloses a power plant flue gas white smoke elimination system based on the heat pipe heat exchange technology. The system comprises a desulfuration and dust removing device, a flue anda chimney. The flue is internally provided with a heat pipe heat exchanger and a reheating heat exchanger in sequence. The heat pipe evaporation segment is arranged inside the flue, the heat pipe condensation segment is located in a sealed box body, and low-temperature cooling water is introduced. The reheating heat exchanger and the heat pipe heat exchanger are both made of an ND steel materialwhich is resistant to corrosion and good in heat-conducting property. The technological process of the system comprises the steps that the low-temperature cooling water absorbs the waste heat of high-temperature flue gas through the heat pipe heat exchanger, the high-temperature flue gas releases heat and generates condensed water, and the temperature and the content of pollutants are lowered; andthe high-temperature steam heats the cooled flue gas through the reheating heat exchanger, the temperature of the emitted flue gas is raised, and the relative humidity is reduced. Through the system,the phenomenon that the power plant chimney emits white smoke is effectively avoided, and gypsum rain falling around a power plant is avoided; and meanwhile, the problem that the chimney is corrodedseriously due to the fact that the low-temperature flue gas stays in the chimney for a long time and is not dispersed is solved. Compared with other technologies, power plant flue gas white smoke elimination system is stable in operation and small in environmental pollution, and the problems that through other technologies, the heat releasing energy is not matched with the heating energy, and thelike are avoided.

Description

Technical field: [0001] The invention relates to a power plant flue gas whitening system, in particular to a power plant flue gas whitening system based on heat pipe heat exchange technology. Background technique: [0002] With the rapid development of my country's economy, power consumption is also increasing day by day. The flue gas of coal-fired power plants will carry a large amount of water after wet desulfurization. Dust, acid mist, water droplets, aerosol, odor and other harmful substances in the wet gas are discharged into the atmosphere through the chimney. Insufficient, it will produce a lot of thick white smoke, which is not conducive to the rapid diffusion of pollutants in high altitude. In addition, the existing methods cannot recycle the acidic condensed water in the flue gas well, and are highly corrosive to the chimney. At the same time, the content of small molecular particles in the chimney is still relatively large, even if it is discharged through the chim...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of low flue gas temperature, high moisture content, and high particulate matter content, which are not conducive to the rapid diffusion of chimney flue gas, excessive acidity in flue gas will seriously corrode the chimney, and existing technologies have problems such as poor stability and mismatching heat and heat release. , the present invention provides a power plant flue gas whitening system based on heat pipe heat exchange technology

Images