Apparatus and method for realizing joint removal of pollutants by recycling chlorine element in coal
A combined removal and chlorine element technology, applied in separation methods, chemical instruments and methods, and dispersed particle separation, can solve the problem of aggravated PM2.5 condensable particle emissions, downstream flue and equipment corrosion, and PM2.5 removal Difficulties and other problems, achieve the effect of realizing waste resource utilization, solving the increase of SO3 emission, and occupying a small space
Active Publication Date: 2016-06-15
SHANDONG UNIV
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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 add wet electrostatic precipitator (WESP) after WFGD to remove sulfuric acid aerosol particles
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[0027] The present invention will be further described below in conjunction with the drawings and embodiments.
[0028] A device for recycling the chlorine element in coal to achieve joint removal of pollutants, combined figure 2 , Including boiler 1, SCR denitrification device 2, air preheater 4, dust collector 5, desulfurization tower 6, chimney 7, slurry pump II 12, the boiler 1 is connected to SCR denitrification device 2, SCR denitrification device 2 and dust collector 5 They are connected by air preheater 4, dust collector 5 is connected with desulfurization tower 6, desulfurization tower 6 is connected with chimney 7, and also includes desulfurization wastewater storage tank 8, atomization nozzle 3, wastewater conditioning tank 11, and air compressor 13 , The atomizing nozzle 3 is set on the connecting pipe between the CR denitration device 2 and the air preheater 4. The atomizing nozzle 3 is connected to the wastewater conditioning tank 11 through the slurry pump II12, a...
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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 the oxidation, removal and deep fixation of elemental mercury in the flue gas of a limestone-gypsum wet coal-fired boiler, as well as the removal of pollutants such as sulfur trioxide and dust, and in particular to the realization of the recycling of chlorine in coal Device and method for joint removal of pollutants. Background technique [0002] Mercury is a very toxic pollutant in the atmosphere, which 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. The mercury in the flue gas is mainly elemental mercury (Hg 0 ), oxidized mercury (Hg 2+ ) And particulate mercury (Hg P ) There are three forms, among which oxidized mercury and particulate mercury are easily removed by conventional pollutant control equipment, and unoxidized elemental mercury is difficult to effectively control due to its strong stability...
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IPC IPC(8): B01D53/75B01D53/60B01D53/64B01D53/68F23J15/04
Inventor 董勇李玉忠崔琳张梦泽雎辉王鹏张立强
Owner SHANDONG UNIV