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

Inactive Publication Date: 2016-01-13
上海羲蓝节能环保科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is to provide an ultra-low emission MGGH energy-saving and environmental protection equipment and method for a thermal power plant that saves coal, saves water, and reduces flue gas emissions, and solves how to meet the requirements of net flue gas emissions. , the problem of improving coal-saving benefits as much as possible

Method used

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  • Ultralow-emission MGGH energy conservation and environmental protection equipment and method for thermal power plant
  • Ultralow-emission MGGH energy conservation and environmental protection equipment and method for thermal power plant
  • Ultralow-emission MGGH energy conservation and environmental protection equipment and method for thermal power plant

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Embodiment 1

[0051] For example, a 1000MW boiler in a power plant, when the unit is operating at 0°C in winter, for figure 2 For the system shown, the temperature rise of the air heater is required to be 60°C; when the ambient temperature is 35°C, the temperature rise of the air heater is required to be 25°C. Low-temperature economizer 8 is not equal to the heating power of the air heater, and the system cannot be balanced. The result of the actual operation is that the air temperature at the outlet of the heater does not reach 60°C, and may be as low as 30°C. When the air temperature at the inlet of the boiler air preheater 4 decreases, the temperature of the flue gas at the outlet of the boiler air preheater 4 will also decrease accordingly , possibly to 100°C, if the gas temperature at the inlet of the electric precipitator 6 is still required to be 90°C, the temperature drop of the flue gas in the high-temperature radiator 5 of the original flue gas is only 10°C, and the thermal power...

Embodiment 2

[0056] For example, a 1000MW boiler in a power plant, when the unit operates at 35°C in summer, for figure 2 For the system shown, a heater temperature rise of 15°C is required. Low-temperature economizer 8 is not equal to the heating power of the air heater, and the system cannot be balanced. The result of actual operation is that the air temperature at the outlet of the heater exceeds 50°C and reaches 60°C. When the air temperature at the inlet of the boiler air preheater 4 increases, the flue gas temperature at the outlet of the boiler air preheater 4 will also increase correspondingly, possibly to 95 ℃, not meeting the design expectations.

[0057] but for image 3 For the system shown, when the ambient temperature is 35°C, the temperature of the air heater is required to rise by 15°C. The thermal power of the low-temperature economizer 8 and the air heater is naturally balanced by means of the condensate system. The result of the actual operation is that the outlet a...

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Abstract

The invention discloses ultralow-emission MGGH energy conservation and environmental protection equipment for a thermal power plant. The equipment is connected with a steam pumping and heat recycling system of a steam turbine through open circulation, automatically balances smoke residual heat recycled with heat required for heating boiler inlet air, avoids smoke dew condensation, prevents smoke low-temperature corrosion, ensues that the influence of ambient temperature variation and unit load variation on the temperature of boiler exhaust smoke can be couteracted under various work conditions, and realizes automatic control on the temperature of electrostatic precipitating inlet smoke and the temperature of the boiler inlet air. The equipment can automatically balance the smoke residual heat recycling power of a low-temperature coal economizer and the boiler inlet air heating power of an air heater, and under various work conditions, can automatically control the temperature of an electrostatic precipitating smoke inlet, automatically control the air outlet temperature of the air heater and automatically control the emission temperature of a chimney. The equipment meets environmental protection requirements for smoke emission, and meanwhile, has social benefit and economical benefit of conserving coal, conserving water and reducing smoke emissions.

Description

technical field [0001] The invention relates to a thermal power plant ultra-low emission MGGH (intermediate heat medium flue gas heat exchanger: MediaGas-GasHeater) energy-saving and environmental protection equipment and method, and belongs to the technical field of thermal power plant ultra-low emission MGGH. Background technique [0002] The issue of ultra-low emissions from boilers in coal-fired power plants has been paid attention to by the state. In economically developed regions such as the Yangtze River Delta and the Pearl River Delta, considerable attention has been paid to white smoke from chimneys. The use of MGGH is becoming more and more common due to the inability to achieve ultra-low emissions due to leaks in previously used GGH systems. [0003] Flue gas desulfurization (FGD for short). Lime-gypsum wet flue gas desulfurization technology of coal-fired flue gas is currently the most widely used and most efficient desulfurization technology. For coal-fired po...

Claims

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Application Information

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IPC IPC(8): F22D1/00F23J15/06F23J15/02
CPCY02E20/30
Inventor 赵贤立
Owner 上海羲蓝节能环保科技有限公司
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