Method for desulfurizing and denitrating boiler gas simultaneously by using active carbon under microwave radiation

A technology for desulfurization, denitrification, and boiler flue gas is applied in the field of flue gas purification, which can solve the problems of high price of vanadium-based catalysts, difficult to popularize and use, and high operating costs, and achieve the effects of easy implementation, high recovery rate and low removal cost.

Inactive Publication Date: 2012-12-26
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Description
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  • Application Information

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Problems solved by technology

The problem with these two methods is: H 2 , NH 3 、CH 4 Both belong to flammable and explosive gases, and there are safety problems as a reducing agent, and the operating cost is high, and the system is complicated; and the use of vanadium-based catalysts is expensive, and it is not easy to popularize and use

Method used

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  • Method for desulfurizing and denitrating boiler gas simultaneously by using active carbon under microwave radiation
  • Method for desulfurizing and denitrating boiler gas simultaneously by using active carbon under microwave radiation
  • Method for desulfurizing and denitrating boiler gas simultaneously by using active carbon under microwave radiation

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Effect test

Embodiment 1

[0022] (1) Preparation of activated carbon particles containing CuCl catalyst: a. The activated carbon particles with a particle size of 1-2 mm are fully cleaned with deionized water to remove surface impurities, and then fully soaked in deionized water for 6 hours to remove impurity ions adsorbed by activated carbon; b. Activated carbon particles are dried in an oven at 120°C to constant weight to obtain base carbon; c. Weigh 10kg CuCl, 490kg dilute HCl, the concentration of dilute hydrochloric acid is 5-10%, prepare a solution containing catalyst, and then add 1 cubic meter of activated carbon The particles were soaked in the above solution for 10 hours; d. The soaked activated carbon particles were repeatedly washed with deionized water until the eluate was neutral, and dried in an oven at 120°C to constant weight to obtain activated carbon particles containing catalyst.

[0023](2) Flue gas desulfurization and denitrification: put the above-mentioned activated carbon partic...

Embodiment 2

[0026] (1) Preparation of activated carbon particles containing CuCl catalyst: a. Fully wash the activated carbon particles with deionized water to remove surface impurities, and then fully soak them in deionized water for 12 hours to remove impurity ions adsorbed by activated carbon; b. Put the activated carbon particles in an oven at 120 ° C Dry to constant weight to obtain base carbon; c. Weigh 30kg CuCl and 270kg dilute HCl to prepare a solution containing the catalyst, and then soak 1 cubic meter of activated carbon particles in the above solution for 2 hours; d. Repeatedly wash and soak with deionized water The activated carbon granules were dried in an oven at 100°C until the eluate was neutral, and the activated carbon granules containing the catalyst were obtained.

[0027] (2) Flue gas desulfurization and denitrification: put the above-mentioned activated carbon particles containing catalyst into a quartz tube to make an activated carbon bed, place the activated carbo...

Embodiment 3

[0030] (1) Preparation of activated carbon particles containing CuCl catalyst: a. Fully wash the activated carbon particles with deionized water to remove surface impurities, and then fully soak them in deionized water for 8 hours to remove impurity ions adsorbed by activated carbon; b. Put the activated carbon particles in an oven at 120 ° C Dry to constant weight to obtain base carbon; c. Weigh 20kg CuCl and 380kg dilute HCl to prepare a solution containing catalyst, and then soak 1 cubic meter of activated carbon particles in the above solution for 8 hours; d. Repeatedly wash and soak with deionized water Activated carbon granules until the eluate is neutral, and dried in an oven at 140°C to constant weight to obtain activated carbon granules containing catalyst.

[0031] (2) Flue gas desulfurization and denitrification: put the above-mentioned activated carbon particles containing catalyst into a quartz tube to make an activated carbon bed, place the activated carbon bed in...

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Abstract

The invention relates to a method for desulfurizing and denitrating boiler gas simultaneously by using active carbon under microwave radiation, which is used for solving the problem of removing sulfur dioxide and nitrogen oxide. The technical scheme is achieved as follows: dedusted gas is introduced into an active carbon bed, is desulfurized and denitrated under the condition that active carbon is heated 400-600 DEG C by microwave, and 10-30kg of CuCl is added into per cubic meter of active carbon to be used as a catalyst. The invention greatly improves the desulfurizing rate and the denitrating rate by using the selective heating property of the microwave and combining the reducing capacity of the carbon to SO2 and NOx, and can achieve desulfurizing rate above 95 percent and denitrating rate above 90 percent. The CuCl catalyst is coated on the surface of the active carbon, therefore, the invention can obviously reduce the denitrating reaction temperature, not only reduces the loss of the active carbon, but also improves the reaction condition, and is beneficial to the recovery of elemental sulfur.

Description

technical field [0001] The invention relates to a flue gas purification method and device, in particular to a method for simultaneously desulfurizing and denitrifying activated carbon by microwave irradiation, and belongs to the technical field of flue gas purification. Background technique [0002] At present, coal is still the main primary energy source in most countries, and the excessive dependence of energy consumption structure on coal has led to the aggravation of environmental pollution. Taking China as an example, according to statistics, in 2007 sulfur dioxide (SO 2 ) with an annual emission of more than 24.681 million tons. Flue Gas Desulfurization (FGD) is currently the world's most effective way to control acid rain and SO 2 The most effective and main technical means of pollution. Its mainstream technology is limestone gypsum washing method, which is relatively mature and has high removal efficiency, but its disadvantages are high investment and complicated ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/04B01J19/12C01B17/04
Inventor 马双忱赵毅马宵颖郭天祥
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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