Flue gas purifying system based on utilization technology of waste heat of flue gas
A flue gas purification system and flue gas waste heat technology, applied in the field of flue gas purification, can solve the problems of large consumption of humidification water
Pending Publication Date: 2018-09-28
章荣发
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Problems solved by technology
[0011] The purpose of the present invention is to provide a flue gas purification system based on flue gas waste heat utilization technology to solve the problem of relatively large consumption of humidification water due to the excessively high inlet flue gas temperature of the circulating fluidized bed absorption tower
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[0028] The present invention will be further described below in conjunction with the embodiments and accompanying drawings.
[0029] figure 1 It is a structural schematic diagram of the first embodiment of the present invention.
[0030] Such as figure 1 As shown, a flue gas purification system based on flue gas waste heat utilization technology provided by the present invention includes SNCR-SCR combined denitrification device 2, air preheater 3, flue gas cooling heat exchanger 5, electrostatic precipitator 7, Clean flue gas recirculation flue 8, circulating fluidized bed absorption tower 9, water spray atomization device 10, flue gas heating heat exchanger 15 and steam turbine condensate heat exchanger 19, and also includes slaked lime bin 17, high-efficiency dust collector 12 and activated carbon powder injection device 14, and gas flow measuring device, gas temperature measuring device, integrated control device (all not shown). After the absorbent slaked lime powder sp...
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The invention discloses a flue gas purifying system based on an utilization technology of waste heat of flue gas. The flue gas purifying system comprises a circulating fluidized bed absorption tower,a flue gas cooling heat exchanger arranged at the upstream of the circulating fluidized bed absorption tower, and a flue gas heating heat exchanger arranged at the downstream of the circulating fluidized bed absorption tower. According to the invention, when the ratio of a measured value of the flow rate of the outlet flue gas of the flue gas cooling heat exchanger to a designed value of the flowrate of the inlet flue gas of the circulating fluidized bed absorption tower is larger than 75%, the outlet flue gas of the circulating fluidized bed absorption tower is heated by utilizing the wastegas of the flue gas through the flue gas heating heat exchanger, so the lift height of the flue gas can be increased; the ground concentration of pollutants can be decreased; the temperature of the inlet flue gas of the circulating fluidized bed absorption tower can meet the requirements of the circulating fluidized bed absorption tower for normal operation; thus, the problem of large consumptionamount of humidification water due to overhigh temperature of the inlet flue gas of the circulating fluidized bed absorption tower is solved.
Description
technical field [0001] The invention relates to the field of flue gas purification, in particular to a flue gas purification system based on flue gas waste heat utilization technology. Background technique [0002] In the process of thermal power generation, the flue gas released during fuel combustion contains air pollutants such as dust, sulfur oxides, nitrogen oxides, dioxins, mercury and their compounds. When unpurified flue gas is discharged into the atmosphere, it will not only bring harm to people's health, but also may form acid rain and photochemical smog. According to the relevant national regulations, newly-built thermal power units must simultaneously install dust removal, desulfurization, and denitrification devices, while the flue gas dust removal, desulfurization, and denitrification devices of thermal power units in service should be upgraded to reduce the concentration of air pollutants emitted by thermal power units. [0003] After the boiler flue gas pass...
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IPC IPC(8): B01D53/79B01D53/50B01D53/96B01D53/90B01D53/60F23J15/06F23J15/08
CPCB01D53/502B01D53/504B01D53/79B01D53/8637B01D53/90B01D53/96F23J15/06F23J15/08B01D2258/0283B01D2251/604B01D2251/404Y02E20/30
Inventor 章荣发
Owner 章荣发