A multifunctional desulfurization, denitrification and demercury adsorbent and its preparation and application

A desulfurization, denitrification, mercury removal, and multifunctional technology, which is applied in the field of multifunctional desulfurization, denitrification, and mercury removal adsorbents and their preparation and application, can solve the problems of low utilization rate, difficulty in realizing large-scale industrialization, and cost increase, and achieve low price, Good catalytic oxidation effect, strong adsorption performance effect

Inactive Publication Date: 2019-07-23
DONGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] To sum up: In recent years, there are many invention patent documents on the preparation and application of adsorbents for removing mercury from coal-fired flue gas at home and abroad, and the most common method is spraying powdered activated carbon. High mercury removal efficiency, but its utilization rate is low. Modified activated carbon treated with halides, sulfides or metal oxides can effectively improve the utilization rate of activated carbon and higher mercury removal efficiency, but the cost will continue to increase, still Difficult to achieve large-scale industrialization

Method used

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  • A multifunctional desulfurization, denitrification and demercury adsorbent and its preparation and application
  • A multifunctional desulfurization, denitrification and demercury adsorbent and its preparation and application

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Embodiment 1

[0038] A multifunctional desulfurization, denitration and demercuration adsorbent, including activated coke, vanadium-based SCR catalyst (V 2 o 5 -WO 3 / TiO 2 Based SCR catalyst) and magnetic silver-loaded zeolite (MagZ-Ag0), the vanadium-based SCR catalyst is supported on the surface of active coke and magnetic silver-loaded zeolite.

[0039] Such as figure 1 As shown, the preparation method of the above-mentioned multifunctional desulfurization, denitration and demercuration adsorbent is:

[0040] (1) Grinding the columnar active coke to 150 meshes, washing the screened active coke powder with deionized water for 3 times, and drying in an oven at 110° C. for 12 hours to obtain the active coke;

[0041] (2) Mix and stir Fe3O4 3g, toluene 90ml and 3-mercaptopropyltrimethoxysilane (3-MPTS) 10ml, place the resulting suspension in an oven at 25°C and dry it into a white solid precipitate, then mix with distilled water 90ml and Na2SiO3 1ml were mixed and stirred, then the sol...

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Abstract

The invention provides a multifunctional desulfurization, denitrification, demercuration adsorbent and preparation and application thereof. The multifunctional desulfurization, denitrification, demercuration adsorbent is characterized by comprising active coke, a vanadium SCR catalyst and magnetic silver-carrying zeolite, wherein mass ratio of active coke to magnetic silver-carrying zeolite is 1:0.25-4; and the vanadium SCR catalyst is loaded on the surface of active coke to magnetic silver-carrying zeolite. The adsorbent of the invention has an obvious purification effect when used in simultaneous desulfurization, denitrification and demercuration of flue gas.

Description

technical field [0001] The invention relates to a multifunctional desulfurization, denitration and demercuration adsorbent and its preparation and application, belonging to the field of flue gas pollutant control, in particular to the adsorption treatment of heavy metals such as mercury in coal combustion flue gas. Background technique [0002] In recent years, with the increasing calls for environmental protection at home and abroad, the control of various pollutants produced by coal combustion has become an urgent problem to be solved. Heavy metal mercury is a very harmful and highly toxic pollutant to the ecological environment and human health. Coal-fired power plants are currently the largest source of mercury emissions. According to the latest standard for air pollutant emissions from thermal power plants (GB13223-2011) promulgated by the Ministry of Environmental Protection of my country: Since January 1, 2015, my country's coal-fired power plants will implement 0.03m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20B01J20/30B01D53/86B01D53/60B01D53/64
Inventor 刁永发魏忠秋王静泓
Owner DONGHUA UNIV
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