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Combustion type heater device used in fume desulfurization and denitrification system

A technology of desulfurization, denitrification and heater, applied in the field of air pollutant control, can solve problems such as poisoning of catalysts with high denitration activity, and achieve the effects of avoiding high local temperature, efficient operation, and avoiding deactivation

Inactive Publication Date: 2017-01-04
张龙 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Current catalysts cannot solve both high denitrification activity and catalyst poisoning at low temperature

Method used

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  • Combustion type heater device used in fume desulfurization and denitrification system
  • Combustion type heater device used in fume desulfurization and denitrification system
  • Combustion type heater device used in fume desulfurization and denitrification system

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Embodiment 1

[0028] See figure 1 and figure 2 , The first embodiment provides a combustion heater device for flue gas desulfurization and denitrification system, including a blender 1 , a combustion air channel 2 , a fuel channel 3 , a combustion nozzle 4 and a flue 5 . The combustion nozzle 4 includes a swirl vane 6 and a jet swirl combustion nozzle 7 . Combustion air passage 2, fuel passage 3 and combustion nozzle 4 jointly constitute a burner. The size and model of each component are selected according to the composition, temperature, target temperature, fuel type and other requirements of the treated flue gas.

[0029] In this embodiment, the combustion-supporting air passes through the combustion-supporting air channel 2 and the swirl vane 6 and then enters the jet swirl combustion nozzle 7 to be mixed with the fuel passing through the fuel channel 3 for combustion. The high-temperature gas after combustion is sprayed into the flue through the jet swirl combustion nozzle 7 to heat...

Embodiment 2

[0034] See figure 1 and image 3 , the first embodiment provides a combustion heater device used in a flue gas desulfurization and denitrification system. The combustion nozzle 4 includes a swirl vane 6 and a lobe swirl combustion nozzle 8 . Other structures and principles of the second embodiment are the same as those of the first embodiment, and will not be repeated here.

Embodiment 3

[0036] See figure 1 and Figure 4 , the first embodiment provides a combustion heater device used in a flue gas desulfurization and denitrification system. The combustion nozzle 4 includes swirl vanes 6 and sawtooth swirl combustion nozzles 9 . Other structures and principles of the third embodiment are the same as those of the first embodiment, and will not be repeated here.

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Abstract

The invention relates to a combustion type heater device used in a fume desulfurization and denitrification system. According to the combustion type heater device, low-temperature fume is heated through fuel combustion, and the purpose of increasing the temperature of the fume to optimal catalysis temperature of a denitrification catalyst in a selective catalytic reduction (SCR) denitrification device can be achieved. By adoption of the combustion type heater device, a combustor and a mixer are additionally mounted on a flue, under the cooperation of the combustor and the mixer, the temperature of the fume inside the flue can be rapidly and uniformly increased to target temperature within a short distance, and the high-efficient operation and the service life of the SCR denitrification device can be ensured. In addition, the combustor and the mixer of the combustion type heater device are simple to mount and easy to replace.

Description

technical field [0001] The invention relates to the field of air pollutant control, and relates to a combustion heater device used in a flue gas desulfurization and denitrification system Background technique [0002] Nitrogen oxides are one of the main pollutants that my country needs to reduce emissions. According to statistics, if no effective control measures are taken, the emissions of nitrogen oxides caused by energy consumption in my country will reach 31.54 million tons and 42.96 million tons. Selective catalytic reduction (SCR) technology is widely used because of its less secondary pollution and high purification efficiency. [0003] Most of the current SCR process adopts the arrangement of high ash area. In this arrangement, the catalyst is in high dust and dust, which is easy to cause blockage and poisoning; the post-desulfurization method will cause sulfur dioxide and ammonia to generate ammonium bisulfate, which will easily cause catalyst poisoning and heat ex...

Claims

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Application Information

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IPC IPC(8): F23J15/08
Inventor 纪雷鸣张龙张凯李仑
Owner 张龙
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