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Sintering and pelletizing flue gas SCR denitration and dioxin removal apparatus

A dioxin and SCR reactor technology, which is applied in the field of denitrification and dioxin removal devices, can solve the problems of difficult promotion, high initial investment and operation costs, and achieve the effects of low ammonia escape rate, reduced blockage, and reduced costs

Active Publication Date: 2013-12-25
宝武水务科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The initial investment and operation costs of this method are very high, so at present, no other steel enterprises in China have adopted this technology, and it is difficult to fully promote it.

Method used

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  • Sintering and pelletizing flue gas SCR denitration and dioxin removal apparatus

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Embodiment

[0030] The connection mode of each equipment in the sintering and pelletizing flue gas SCR denitrification and dioxin removal device of this embodiment is as attached figure 1shown. The device includes a rotary flue gas heat exchanger 4, a duct burner 5, an ammonia injection grid 6, a flue gas mixer 7, an SCR reactor 8 and an ammonia-air mixer 11, and the rotary flue gas heat exchanger 4 includes The first cold-end inlet flue, the first hot-end outlet flue, the second hot-end inlet flue, and the second cold-end outlet flue, wherein the first cold-end inlet flue is connected to the sintering and pelletizing main exhaust fan 3 The outlet flue of the SCR reactor 8 is connected to the outlet flue of the first hot end of the rotary flue gas heat exchanger 4; the pipe burner 5, the ammonia injection grid 6, and the flue gas mixer 7 are arranged in sequence Between the rotary flue gas heat exchanger 4 and the SCR reactor 8, specifically, it is arranged inside the flue connecting the...

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Abstract

The invention discloses a sintering and pelletizing flue gas SCR denitration and dioxin removal apparatus. The apparatus mainly comprises a heat exchange device for the primary heating of a flue gas for processing, a secondary heating device, a reaction device for the SCR denitration and dioxin removal of the flue gas, and an ammonia-air supply device arranged between the heat exchange device and the SCR reaction device, wherein a smoke outlet of the SCR reaction device is connected with a thermal medium inlet of the heat exchange device. The apparatus has the advantages of high efficiency, low ammonia escape rate, effective mitigation of poisoning caused by the wearing and obstruction of a catalyst by dusts in the flue gas, effective solving of a technical bottleneck that effective nitrogen removal cannot be realized because of the too low temperature of the sintering and pelletizing flue gas out of a normal work temperature range of a denitration catalyst, recovery of flue gas discharging heat, running cost reduction, and furthest reduction of the nitrogen removal cost.

Description

technical field [0001] The invention relates to a device for denitrification and dioxin removal of sintering and pelletizing flue gas, in particular to a device for treating nitrogen oxides (NOx) and dioxins in sintering and pelletizing flue gas by using SCR (selective catalytic reduction method) technology. Dioxins or Furans (DXN) devices. Background technique [0002] SO in sintering and pellet flue gas 2 Pollutants such as , NOx and DXN are the main pollution sources of the iron and steel industry. There are currently more than 200 sintering flue gas desulfurization devices that have been built or are under construction in China. It is foreseeable that by December 31, 2014, domestic sintering, Pellet flue gas desulfurization task, but for the removal of pollutants such as NOx and DXN, there is basically no effective proprietary device for removal. And NOx has become the successor to SO 2 After that, the main air pollutants, NOx usually include NO, NO 2 , N 2 O et al....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/90B01D53/56B01D53/70
Inventor 陈活虎褚善庆倪建东江峰
Owner 宝武水务科技有限公司
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