Ultralow-emission MGGH energy conservation and environmental protection equipment and method for thermal power plant
An energy-saving and environmental protection technology for thermal power plants, applied in lighting and heating equipment, feed water heaters, preheating, etc., to achieve the effects of reducing flue gas emissions, reducing social and economic benefits, and avoiding low-temperature corrosion of flue gas
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[0050] Example 1
[0051] For example, for a 1000MW boiler in a power plant, when the unit is operating at 0℃ in winter, the figure 2 For the system shown, the heater requires a temperature rise of 60°C; when the ambient temperature is 35°C, it requires a temperature rise of 25°C. The thermal power of the low-temperature economizer 8 and the heater are not equal, and the system cannot be balanced. The actual operation result is that the outlet air temperature of the heater does not reach 60°C, and may be as low as 30°C. When the inlet air temperature of the boiler air preheater 4 decreases, the outlet flue gas temperature of the boiler air preheater 4 will also decrease accordingly If the temperature of the flue gas at the inlet of the electric precipitator 6 still requires 90℃, the flue gas temperature of the original flue gas high temperature radiator 5 will only drop by 10℃, and the thermal power of the first cycle will naturally decrease; The residual heat of the flue gas i...
Example Embodiment
[0055] Example 2
[0056] For example, for a 1000MW boiler in a power plant, when the unit operates at 35℃ in summer, the figure 2 For the system shown, the heater requires a temperature rise of 15°C. The thermal power of the low-temperature economizer 8 and the heater are not equal, and the system cannot be balanced. The actual operation result is that the outlet air temperature of the heater exceeds 50°C and reaches 60°C. When the inlet air temperature of the boiler air preheater 4 increases, the outlet flue gas temperature of the boiler air preheater 4 will also increase correspondingly, possibly to 95 ℃, failing to meet the design expectations.
[0057] But for image 3 For the system shown, when the ambient temperature is 35°C, the heater requires a temperature rise of 15°C. The thermal power of the low-temperature economizer 8 and the heater is naturally balanced by the condensate system. The result of actual operation is that the outlet air temperature of the heater rea...
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