White smoke heating eliminating device and method for smoke of fossil-fuel power station

Abstract

The invention discloses a white smoke heating eliminating device and method for smoke of a fossil-fuel power station. The white smoke heating eliminating device comprises a smoke duct for dischargingthe smoke after being desulfurized and is characterized by further comprising a sleeve heater which is arranged on the outer side wall of the smoke duct, and steam connecting ports for introducing steam and drainage ports for discharging condensed water are arranged on the sleeve heater. The sleeve heater which is arranged on the outer side wall of the smoke duct communicates with A low-pressure air exhaust air source introduced to a turbine through the sleeve heater which is arranged on the outer side wall of the smoke duct in a sleeving mode enables the smoke to be heated up to achieve the purpose of completely eliminating white smoke. According to the white smoke heating eliminating device and method for the smoke of the fossil-fuel power station, the invest cost is reduced by above 90%and does not exceed one tenth of the invest cost of a frequently-used MGGH system, the internal structure of the smoke duct is not influenced, and the changes of resistance of the smoke are tiny according to testing measurement. According to the white smoke heating eliminating device and method for the smoke of the fossil-fuel power station, low-pressure air exhaust of the turbine is adopted as aheating air source, steam condensed water is fully used, and the operating cost of the white smoke heating eliminating device and method is far lower than the operating cost of the frequently-used MGGH system.

Description

technical field [0001] The invention relates to the technical field of environmental protection equipment for thermal power plants, in particular to a device for heating and eliminating white smoke with flue gas in a thermal power plant and a method for heating and eliminating white smoke. Background technique [0002] According to the national air pollution prevention and control plan, the environmental protection policies of some provinces and cities require that the flue gas after desulfurization in thermal power plants should be dehumidified and whitened. The currently commonly used desulfurization and white smoke elimination equipment is the MGGH system, such as figure 1 As shown, the flue gas enters the desulfurization tower after being dedusted by the dust collector, and the desulfurized flue gas is heated by the flue gas heater and then discharged through the chimney. Among them, the flue gas heater is heated by the water heated up by the hot water heater, and the w...

AI Technical Summary

Problems solved by technology

In the MGGH system, the scheme of using closed circulating water to heat and eliminate white smoke requires a lot of equipment, the system is too large, the investment is too high, and the operating cost is also high.

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