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Method for preparing complex removal agent from steel and iron pickling waste residues to carry out desulfurization and denitrification

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

Active Publication Date: 2014-01-29
HEBEI UNIV OF TECH
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  • Claims
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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 ingredients is about 25% to 30%. Unit removal requires a large amount of pickling waste, which requires larger equipment and higher operating costs

Method used

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  • Method for preparing complex removal agent from steel and iron pickling waste residues to carry out desulfurization and denitrification

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Embodiment Construction

[0018] The present invention will be described in detail below through specific embodiments and in conjunction with the accompanying drawings.

[0019] A: Composite remover preparation process

[0020] Referring to the accompanying drawings, crush, grind, and sieve the pickling waste residue from a steel plant in Bazhou, Hebei, weigh the mass M1=65kg of the fine powder with a particle size less than 100 μm, and then weigh M2=M3=10kg respectively. Calcium hydroxide and calcium hypochlorite, then take by weighing the water that quality is M4=45kg, add the pickling waste residue, calcium hydroxide, calcium hypochlorite, water that take by weighing into agitator, stir 50min under normal temperature, normal pressure , to obtain a uniformly mixed paste-like composite remover. Take a corundum ball with a particle size of 1500 μm, and evenly roll-coat the paste-like composite remover on the corundum ball. After rolling, the equivalent diameter of the corundum ball is (3000-5000) μm. ...

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Abstract

The invention provides a method for preparing a complex removal agent from steel and iron pickling waste residues to carry out desulfurization and denitrification. The method is characterized by mixing 35-50% of pickling waste residues from steel and iron plants, 7-13.5% of calcium hydroxide, 7-13.5% of calcium hypochlorite and 30-45% of water by mass uniformly to prepare a paste-like complex removal agent, uniformly roll-coating the paste-like complex removal agent on inert particles, drying the particles with equivalent diameters of 400-5000mu m under certain conditions after roll coating, and filling the particles into a fixed bed reaction device when the moisture content is 15-30%, wherein the filling height is 2-8m; filling gases to be desulfurized and denitrified at 15-50 DEG C from the bottom of the device, wherein the apparent velocity of the gases based on the fixed bed section is 0.005-0.15m / s, and tail gases enter an after-treatment system. The 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 method for desulfurization and denitrification by preparing a composite removal agent with iron and steel pickling waste slag, in particular to a removal agent and method for removing sulfide and nitride in boiler flue gas by using iron and steel pickling waste slag , 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. Thanks to SO 2 and NO...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/80B01D53/60B09B3/00
Inventor 张少峰王德武刘燕王晋刚马倩刘海龙
Owner HEBEI UNIV OF TECH
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