Desulfurization and denitrification agent with pickling waste residues from steel and iron plants as main materials and removal method

A pickling waste slag, desulfurization and denitrification technology, applied in the fields of electric power, steel, energy, chemical industry and environmental protection, can solve the problems of large equipment, large quantities, high operating costs, etc., achieve simple preparation and removal methods, low cost, and realize boiler The effect of flue gas dust removal

Active Publication Date: 2014-01-29
HEBEI UNIV OF TECH
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Problems solved by technology

[0005] Judging from the content of active ingredients in desulfurization and denitrification of pickling waste residue, the mass percentage of active

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  • Desulfurization and denitrification agent with pickling waste residues from steel and iron plants as main materials and removal method

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Embodiment Construction

[0014] The present invention will be described in detail below through specific embodiments and in conjunction with the accompanying drawings.

[0015] A: Desulfurization and denitrification slurry preparation process

[0016] Referring to the attached figure, crush, grind, and sieve the pickling waste residue from a steel factory in Bazhou, Hebei, weigh the mass M1=18kg of the fine powder with a particle size of less than 200 μm, and then weigh the powder with a purity of 95% and a particle size of All less than 100 μm, quality is respectively calcium hydroxide and calcium hypochlorite of M2=M3=6kg, then take by weighing the water that quality is M4=3000kg, pickling waste residue, calcium hydroxide, calcium hypochlorite, Add water into the mixer, stir at normal temperature and pressure for 30 minutes, and then put it into the storage tank for later use.

[0017] B: Desulfurization and denitrification process

[0018] Referring to the attached figure, the fluidized device fo...

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Abstract

The invention provides a desulfurization and denitrification agent with pickling waste residues from steel and iron plants as main materials and a removal method. The removal method is characterized by mixing 50-80% of pickling waste residue fine powder, 5-30% of calcium hydroxide fine powder and 5-30% of calcium hypochlorite fine powder by mass, then adding water to the mixture according to a mass ratio of 1/(95-99.5), and stirring the mixture for 10-60 minutes, thus preparing desulfurization and denitrification agent slurry; enabling gases to be removed at 110-140 DEG C to enter a fluidization device with corundum sphere filling height of 1.5-4m from the bottom, wherein the apparent velocity of the gases based on the bed cross section is 0.01-1.0m/s; uniformly spraying the slurry onto the surfaces of the corundum spheres by a spray device arranged 0.5-3m above the charge level of a bed of the fluidization device, wherein the spray density is (1-10)m<3>/(m<2>.h). The desulfurization and denitrification agent and the removal method can be applied to the fields such as steel and iron, power, energy and environmental protection.

Description

technical field [0001] The invention relates to a desulfurization and denitrification agent and a removal method based on iron and steel plant pickling waste slag, in particular to a method for removing sulfides and nitrides in boiler flue gas by using iron and steel plant pickling waste slag The invention relates to an agent and a method, belonging to the fields of iron and steel, electric power, energy, chemical industry and environmental protection. Background technique [0002] SO in boiler flue gas 2 and NO X It is the main component of air pollutants. The "Comprehensive Emission Standards of Air Pollutants" (GB16297-1996), "Emission Standards of Air Pollutants for Boilers" (GB13271-2001), "Emission Standards of Air Pollutants for Industrial Furnaces" promulgated and implemented in my country "(GB9078-1996), "Emission Standard of Air Pollutants for Thermal Power Plants" (GB13223-2003) and other series of standards and regulations, all have clear limits on its content. ...

Claims

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Application Information

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IPC IPC(8): B01D53/80B01D53/60B09B3/00
Inventor 张少峰王德武刘燕王乾宇马倩刘海龙
Owner HEBEI UNIV OF TECH
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