SCR (Selective Catalytic Reduction) de-nitration catalyst based on natural manganese iron ore as well as preparation method and application method thereof

A kind of denitration catalyst, technology of application method

Inactive Publication Date: 2017-10-24
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to overcome the influence of the active temperature window of the catalyst, the use temperature range of the existing commonly used denitrification catalyst is relatively high, so it is not suitable for the situation that the temperature of the flue gas desulfurization and dust removal of the existing power plants in my country is relatively low, and the catalyst is easy to Blockage and poisoning occur, and the deficiencies of low denitrification efficiency provide a kind of SCR denitration catalyst based on natural ferromanganese ore and its preparation and application method

Method used

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  • SCR (Selective Catalytic Reduction) de-nitration catalyst based on natural manganese iron ore as well as preparation method and application method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0035] A kind of preparation method of the SCR denitrification catalyst based on natural ferromanganese ore of the present embodiment, its steps are: the natural ferromanganese ore is crushed and ground by pulverizer, and then sieved with 100 mesh sieves, and The screened powder was placed in a muffle furnace and calcined at 450°C for 5 hours, then cooled to room temperature and sealed for storage to obtain the SCR denitration catalyst particles of this example, the particle size of which was less than 150 μm, and the SCR denitration catalyst obtained in this example The average particle diameter of the particles was 120 μm. The natural ferromanganese ore in this embodiment is collected from the Beihai area of ​​Guangxi, and contains iron oxides, manganese oxides and aluminum oxides, wherein the mass ratio of iron to manganese is 1:1, and the mass ratio of iron to aluminum is 3:1 , the specific surface area of ​​the natural ferromanganese ore is 35m 2 / g.

[0036] It is wort...

Embodiment 2

[0047] The preparation method of a SCR denitrification catalyst based on natural ferromanganese ore in this embodiment comprises the steps of: crushing and grinding the natural ferromanganese ore with a pulverizer, and then sieving with a 100-mesh sieve The screened powder was placed in a muffle furnace for calcination at 400° C. for 6 hours, then cooled to room temperature and sealed for storage to obtain the SCR denitration catalyst particles of this example, with an average particle size of 145 μm. The natural ferromanganese ore in this embodiment contains iron oxides, manganese oxides and aluminum oxides, wherein the mass ratio of iron to manganese is 1:2, and the mass ratio of iron to aluminum is 9:1. The natural ferromanganese The specific surface area of ​​the ore is 25m 2 / g.

[0048] Weigh 1g of the prepared catalyst powder, place it in a drying oven at 120°C for 3 hours and dry it for 3 hours, then put it into the catalytic denitration reaction tube, wrap it with th...

Embodiment 3

[0051] The preparation method of a SCR denitrification catalyst based on natural ferromanganese ore in this embodiment comprises the steps of: crushing and grinding the natural ferromanganese ore with a pulverizer, and then sieving with a 100-mesh sieve The screened powder was placed in a muffle furnace and calcined at 600° C. for 3 hours, then cooled to room temperature and sealed for storage to obtain the SCR denitration catalyst particles of this example, with an average particle size of 70 μm. The natural ferromanganese ore of this embodiment contains iron oxides, manganese oxides and aluminum oxides, wherein the mass ratio of iron-manganese elements is 1:3, and the mass ratio of iron-aluminum elements is 5:1. The natural ferromanganese The specific surface area of ​​the ore is 60m 2 / g.

[0052] Take out 0.3g of the prepared catalyst powder, put it in a drying oven at 110°C for 4 hours and dry it for 4 hours, then put it into the catalytic denitration reaction tube, wrap...

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Abstract

The invention discloses an SCR (Selective Catalytic Reduction) de-nitration catalyst based on natural manganese iron ore as well as a preparation method and application method thereof, and belongs to the technical field of atmospheric pollution. The SCR de-nitration catalyst is characterized in that the natural manganese iron ore containing ferric oxide, manganese oxide and aluminum oxide is taken as a raw material, and is smashed, ground, screened, and calcined to obtain powder-like particles; during de-nitration, SCR de-nitration catalyst powder is covered with heat preservation cotton and is fixedly arranged at the axis of an entrance of a flue gas pipe behind an ESP (Electrostatic Precipitator). The SCR de-nitration catalyst is convenient to produce, is easy to use, has a relatively good de-nitration effect at low temperature, capability of solving the problems of relatively low de-nitration efficiency and slightly-high application temperature section existing in an conventional de-nitration catalyst, and contribution to prolonging the service life of the catalyst, and the cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of air pollution, and more specifically relates to an SCR denitration catalyst based on natural ferromanganese ore and a preparation and application method thereof. Background technique [0002] Energy is an important material basis for the survival and development of human beings. With the increasing production and consumption of energy, the environmental problems caused by traditional mineral combustion are becoming more and more serious, especially the large amount of nitrogen produced by burning coal while generating electricity in coal-fired power plants. Oxides (NO x ) have caused great pollution to the environment. The emission of nitrogen oxides can not only cause acid rain, but also cause photochemical smog and low-altitude ozone, which have caused serious harm to the environment and human body. Nowadays, for NO x The control methods are mainly divided into two categories: one is such as low NO ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889B01D53/90B01D53/86B01D53/56
CPCB01J23/002B01D53/8628B01D53/90B01D2255/2073B01D2255/20738B01D2255/2092B01J23/8892B01J35/1014B01J37/08B01J2523/00B01J2523/31B01J2523/72B01J2523/842
Inventor 朱宝忠王启昌孙运兰尹寿来陈九玉堵同宽孙华建
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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