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Preparation method of novel SCR smoke denitrification catalyst adopting titanium-containing blast furnace slag as carrier

A technology for denitration catalyst and blast furnace slag, which is applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of large amount of acid and difficult industrialized implementation, etc. Achieve the effect of high activity, low preparation cost and high denitration activity

Active Publication Date: 2016-02-17
PANGANG GRP PANZHIHUA STEEL & VANADIUM
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  • Abstract
  • Description
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Problems solved by technology

However, such methods only utilize some components of titanium-containing blast furnace slag, others such as Al 2 o 3 , SiO 2 , CaO and other components have not been effectively utilized, and the amount of acid used is large, and a large amount of waste acid solution containing metal ions is produced during the treatment process, which brings about the purification treatment of secondary sewage and is difficult to implement industrially

Method used

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  • Preparation method of novel SCR smoke denitrification catalyst adopting titanium-containing blast furnace slag as carrier
  • Preparation method of novel SCR smoke denitrification catalyst adopting titanium-containing blast furnace slag as carrier
  • Preparation method of novel SCR smoke denitrification catalyst adopting titanium-containing blast furnace slag as carrier

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preparation example Construction

[0028] The invention provides a method for preparing a denitration catalyst with titanium-containing blast furnace slag as a carrier, which is characterized in that it comprises the following steps:

[0029] a. Pretreatment of titanium-containing blast furnace slag:

[0030] The titanium-containing blast furnace slag is crushed, ball-milled, and sieved to obtain titanium-containing blast furnace slag powder;

[0031] B, the preparation of catalyst:

[0032] Take the active components and additives and add water to prepare a mixed solution, add the titanium-containing blast furnace slag powder obtained in step a into the mixed solution, and after ultrasonication, stirring, impregnation, drying and calcination, cooling can obtain the denitrification of titanium-containing blast furnace slag as a carrier Catalyst; the active component is manganese oxide, and the auxiliary agent is cerium oxide.

[0033] Wherein, the particle size of the titanium-containing blast furnace slag po...

Embodiment 1

[0045] a. Pretreatment of titanium-containing blast furnace slag. The titanium-containing blast furnace slag is crushed, ball-milled, sieved, and the powder with a particle size of 180-200 mesh is taken for use.

[0046] b. Catalyst prepared by excess impregnation method. Get the titanium-containing blast furnace slag powder 10g that obtains in a, 50% manganese nitrate solution (Chinese medicine, AR) 5.72mL, Ce(NO 3 ) 3 ·6H 2 O (Chinese medicine, AR) 5.34g, dissolved in 100mL deionized water, after ultrasonic treatment for 30min, impregnated under rapid stirring conditions for 6h, dried at 120°C for 48h, heated at 10°C / min to 500°C in an air atmosphere for heat preservation and calcination After 6 hours, the catalyst sample 1 was obtained after natural cooling.

Embodiment 2

[0048] a. Pretreatment of titanium-containing blast furnace slag. The titanium-containing blast furnace slag is crushed, ball-milled, sieved, and the powder with a particle size of 100-120 mesh is taken for use.

[0049] b. Catalyst prepared by excess impregnation method. Get 10g of titanium-containing blast furnace slag powder obtained in a, 50% manganese nitrate solution (Sinopharm, AR) 5.07mL, Ce(NO 3 ) 3 ·6H 2 O (Sinopharm, AR) 1.89g, dissolved in 100mL deionized water, ultrasonically treated for 30min, impregnated for 6h under rapid stirring conditions, dried at 120°C for 48h, heated at 10°C / min to 500°C in an air atmosphere for calcination After 6 hours, the catalyst sample 2 was obtained after natural cooling.

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Abstract

The invention belongs to the field of the utilization of blast furnace slag, and particularly relates to a preparation method of a novel SCR smoke denitrification catalyst adopting titanium-containing blast furnace slag as a carrier. The preparation method comprises the following steps: a, pretreating the titanium-containing blast furnace slag; and b, preparing the catalyst. The preparation method of the catalyst is simple and easy in operation, high in blast furnace slag utilization rate, capable of effectively solving the resource waste and environmental pollution problem caused by the extensive application of the titanium-containing blast furnace slag and capable of enlarging the application field of the blast furnace slag; the catalyst prepared in the method is high in activity, wide in active temperature window and capable of maintaining relatively high denitrification activity at the temperature of 160 to 260 DEG C.

Description

technical field [0001] The invention belongs to the utilization field of blast furnace slag, and in particular relates to a preparation method of a novel SCR flue gas denitrification catalyst using titanium-containing blast furnace slag as a carrier. Background technique [0002] Nitrogen oxides (NO x ) is one of the main pollutants in the atmosphere, which will cause many harmful social and environmental problems such as acid rain and photochemical smog. The main source of nitrogen oxides is the combustion of fossil fuels, and nearly 90% of my country's current energy structure is fossil energy. Therefore, the reduction and control of nitrogen oxides is the main and urgent task of my country's air pollution prevention and control. Since 2000, my country's coal-fired power plants have developed rapidly, and the emissions of nitrogen oxides have also increased significantly. The annual emissions of nitrogen oxides in the power industry account for about 70% of the total emis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/34
Inventor 林千谷刘荣宋剑叶飞王睿
Owner PANGANG GRP PANZHIHUA STEEL & VANADIUM
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