The invention provides a combined steam smoke MGGH system. The combined steam smoke MGGH system comprises a boiler air pre-heating device, wherein the boiler air pre-heating device is connected with a flue gas cooler, the flue gas cooler is connected with a dust remover, the dust remover is connected with an induced draft fan, the induced draft fan is connected with a desulfurization device, the desulfurization device is connected with a flue gas re-heating device, the flue gas re-heating device is connected with a steam heater, and the steam heater is connected with a chimney. The combined steam smoke MGGH system is characterized in that the steam heater is arranged between the flue gas re-heating device and the chimney, a steam auxiliary heater is arranged between the flue gas cooler and the flue gas re-heating device, and the flue gas re-heating device is connected with the flue gas cooler through a variable frequency circulating pump. The combined steam smoke MGGH system and a flue gas treatment technology thereof mainly solve the problem that due to the fact that flue gas temperature is not high enough, an existing MGGH system uses steam to assist in heating, and can significantly reduce steam consumption and engineering cost investment.

Combined steam smoke MGGH system and flue gas treatment technology

The invention discloses a method for improving temperature of smoke discharged by a thermal power plant, a smoke heating system and a thermal power generation unit adopting the system. The method utilizes waste steam of a driving steam turbine to heat the smoke passing through and flowing out of a desulfurizing absorption tower, and then heated smoke is discharged into a chimney. The smoke heating system comprises a smoke heating device which is arranged between the desulfurizing absorption tower and the chimney and used for utilizing the waste steam of the driving steam turbine to heat the smoke. The smoke heating system fully utilizes the waste steam energy of the driving steam turbine, especially latent heat of vaporization in the waste steam, the overall efficiency of the thermal power plant is improved, meanwhile the smoke rising height is increased, the pollutant falling concentration is reduced, and environmental protection is facilitated.

Method for improving temperature of smoke discharged by chimney of thermal power plant, smoke heating system and thermal power generation unit

The utility model relates to a steam-smoke gas heater for smoke gas desulphurization, which comprises an adjustable heater and is characterized in that the drainage side of the adjustable heater is provided with a drainage adjusting valve. The utility model changes the opening degree of the drainage adjusting valve to adjust the water level of the heater, and changes the temperature of the smoke gas outlet of the adjustable heater. On the premise of satisfying the discharging requirements, the utility model achieves the goal of saving energy. The utility model has the advantages that the steam-smoke gas heater can be controlled, and has good operation and energy saving efficiency.

Hu Xinsheng

Papers

Vapour-smoke heater for smoke desulfurizing