Pollutant combined removal device and method through recycling of chlorine in coal

A combined removal and chlorine element technology, applied in separation methods, chemical instruments and methods, dispersed particle separation, etc., can solve the problem of aggravating PM2.5 condensable particle emissions, PM2.5 removal difficulties, downstream flue and equipment Corrosion and other problems, achieve the effect of realizing the utilization of waste resources, solving the increase of SO3 emission, and occupying a small space

Active Publication Date: 2014-07-23
SHANDONG UNIV
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  • Abstract
  • Description
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Problems solved by technology

Electrostatic precipitator and bag filter cannot remove this part of sulfuric acid aerosol particles, WFGD has a good effect on SO 3 The removal rate is low, which makes it difficult to remove PM2.5. It is usually necessary to ...

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  • Pollutant combined removal device and method through recycling of chlorine in coal
  • Pollutant combined removal device and method through recycling of chlorine in coal

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0028] A device for recycling chlorine elements in coal to realize joint removal of pollutants, combined with figure 2 , including a boiler 1, an SCR denitration device 2, an air preheater 4, a dust collector 5, a desulfurization tower 6, a chimney 7, and a slurry pump II 12, the boiler 1 is connected to the SCR denitration device 2, and the SCR denitration device 2 is connected to the dust collector 5 They are connected by air preheater 4, dust remover 5 is connected with desulfurization tower 6, desulfurization tower 6 is connected with chimney 7, and also includes desulfurization wastewater storage tank 8, atomizing nozzle 3, wastewater conditioning tank 11, air compressor 13 , the atomizing nozzle 3 is set on the connecting pipe between the CR denitrification device 2 and the air preheater 4, the atomizing nozzle 3 is connected to the wastewater co...

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Abstract

The invention discloses a pollutant combined removal device and method through recycling of chlorine in coal. The pollutant combined removal device comprises a boiler, a SCR (selective catalytic reduction) denitration device, an air preheater, a dust remover, a desulfurization tower, a chimney, and a slurry pump II, wherein the boiler is connected with the SCR denitration device, the SCR denitration device is connected with the dust remover by the air preheater, the dust remover is connected with the desulfurization tower, and the desulfurization tower is connected with the chimney. The pollutant combined removal device also comprises a desulfurization?wastewater?storage box, an atomizing nozzle, a wastewater conditioning tank, and an air compressor, wherein the atomizing nozzle is arranged on a connection pipeline between the SCR denitration device and the air preheater and connected with the wastewater conditioning tank by the slurry pump II, the air compressor is connected with the atomizing nozzle, and the desulfurization?wastewater?storage box is connected with the desulfurization tower and the wastewater conditioning tank which is filled with strong base. The removal of mercury in fume is facilitated, meanwhile the PH value of the chlorine-rich desulfurization wastewater can be adjusted, so that the desulfurization?wastewater is effectively utilized and the removal efficiency of SO3 in fume is improved.

Description

technical field [0001] The invention relates to the technical field of oxidation, removal and deep fixation of elemental mercury in the flue gas of a limestone-gypsum wet coal-fired boiler, and the removal of pollutants such as sulfur trioxide and dust, and in particular to a realization of the recycling of chlorine in coal A device and method for joint removal of pollutants. Background technique [0002] Mercury is a highly toxic class of pollutants in the atmosphere that can cause damage to the human nervous system. Flue gas emissions from coal-fired boilers in power plants are the main source of mercury in the atmosphere. Mercury is mainly in the form of elemental mercury (Hg 0 ), oxidized mercury (Hg 2+ ) and particulate mercury (Hg P ) exist in three forms, of which oxidized mercury and particulate mercury are easily removed by conventional pollutant control equipment, and unoxidized elemental mercury is difficult to be effectively controlled due to its strong stabi...

Claims

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Application Information

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IPC IPC(8): B01D53/75B01D53/60B01D53/64B01D53/68F23J15/04
Inventor 董勇张梦泽王鹏崔琳张立强徐夕仁马春元
Owner SHANDONG UNIV
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