Exhaust gas waste heat recovery and emission reduction comprehensive application system for coal-fired boiler in thermal power plant
A technology for thermal power plants and coal-fired boilers, which is applied in indirect carbon dioxide emission reduction, preheating, combustion methods and other directions to achieve the effect of improving dust removal efficiency, reducing the size of small dust collectors and reducing the size of pipes
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Embodiment 1
[0043] Such as figure 2 As shown, a coal-fired boiler exhaust heat recovery and emission reduction comprehensive application system in a thermal power plant, along the flow direction of the flue gas, an air preheater 1, a first Low temperature economizer 2, low and low temperature dust collector 3, induced draft fan 4, second low temperature economizer 5, desulfurization island 6, the inlet of the air preheater 1 is respectively connected with the cold primary air pipeline 15 and the cold secondary air pipeline 16 The cold secondary air pipeline 16 is provided with a secondary air heater 9, and the secondary air heater 9 communicates with the second low-temperature economizer 5 through the water medium pipeline 10, and the water medium The pipeline 10 is provided with an expansion tank 11 and a water pump 12 . There is no heating device on the cold primary air duct 15 .
[0044] The working process of this embodiment: the flue gas C comes out of the air preheater, passes th...
Embodiment 2
[0046] Such as image 3 As shown, a coal-fired boiler exhaust heat recovery and emission reduction comprehensive application system in a thermal power plant, along the flow direction of the flue gas, an air preheater 1, a first Low temperature economizer 2, low and low temperature dust collector 3, induced draft fan 4, second low temperature economizer 5, desulfurization island 6, the inlet of the air preheater 1 is respectively connected with the cold primary air pipeline 15 and the cold secondary air pipeline 16 The cold secondary air pipeline 16 is provided with a secondary air heater 9, and the secondary air heater 9 communicates with the second low-temperature economizer 5 through the water medium pipeline 10, and the water medium The pipeline 10 is provided with an expansion tank 11 and a water pump 12 . The cold primary air pipeline 15 is provided with a primary air heater 8 , and the primary air heater 8 and the secondary air heater 9 share the same water medium pipel...
Embodiment 3
[0050] Such as Figure 4 As shown, a coal-fired boiler exhaust heat recovery and emission reduction comprehensive application system in a thermal power plant, along the flow direction of the flue gas, an air preheater 1, a first Low temperature economizer 2, low and low temperature dust collector 3, induced draft fan 4, second low temperature economizer 5, desulfurization island 6, the inlet of the air preheater 1 is respectively connected with the cold primary air pipeline 15 and the cold secondary air pipeline 16 The cold secondary air pipeline 16 is provided with a secondary air heater 9, and the secondary air heater 9 communicates with the second low-temperature economizer 5 through the water medium pipeline 10, and the water medium The pipeline 10 is provided with an expansion tank 11 and a water pump 12 .
[0051] The primary air heater 8 is arranged on the cold primary air pipeline 15, and the primary air heater 8 is connected with the low-pressure heater from the heat...
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