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Preparation, use and reproduction method of reproducible load type flue gas desulfurization agent

A desulfurizer and load-type technology is applied in the field of preparation, use and regeneration of renewable load-type flue gas desulfurizers, which can solve the problems of high investment and operating costs, few cycles, and low desulfurization rate of flue gas desulfurizers. Achieve the effect of low operating cost, low production cost and high desulfurization rate

Inactive Publication Date: 2012-07-18
HUAIYIN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing, using and regenerating a reproducible load-type flue gas desulfurizer. The desulfurizer prepared by the preparation method is used for flue gas desulfurization, which can solve the problem of the desulfurization rate of the existing flue gas desulfurizer. Low, low cycle times, high investment and operating costs, etc., suitable for use under the conditions of flue gas exhaust temperature and high space velocity of industrial coal-fired boilers, with high desulfurization activity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Add activated carbon to the attapulgite powder with a particle size of 45 μm. The amount of activated carbon added is 15% of the weight of the attapulgite. After mixing evenly, add an appropriate amount of water to stir into a paste, put it into a molding machine, and first place it in an oven. Dry at 105°C for 3 hours, and then bake at 300°C for 2 hours in a nitrogen atmosphere to make a carrier; put the prepared carrier into 0.2mol / L Ce(NO 3 ) 3 The desulfurizer was obtained by immersing in the same volume for 2 hours in the solution, first drying at 60°C for 3 hours, then drying at 105°C for 5 hours, and finally roasting at 200°C for 3 hours in a nitrogen atmosphere.

[0018] Put 1 gram of the above-mentioned desulfurizer into a fixed-bed reactor, raise the temperature to 120°C for ventilation reaction, and simulate the composition of the flue gas as SO 2 520ppm, O 2 5%, H 2 O 3%, N 2 The balance, the gas flow rate is 310ml / min, the desulfurization time is 30mi...

Embodiment 2

[0021] Add activated carbon to the attapulgite powder with a particle size of 45 μm. The amount of activated carbon added is 25% of the weight of the attapulgite. After mixing evenly, add an appropriate amount of water to stir into a paste, put it into a molding machine, and first place it in an oven. Dry at 105°C for 4 hours, and then bake at 350°C for 2 hours in a nitrogen atmosphere to make a carrier; put the prepared carrier into 0.5mol / L Ce(NO 3 ) 3 The desulfurizer was obtained by impregnating the same volume in the solution for 3 hours, drying at 60°C for 3 hours, then drying at 105°C for 5 hours, and finally roasting at 250°C for 3 hours in a nitrogen atmosphere.

[0022] Put 1 gram of the above-mentioned desulfurizer into a fixed-bed reactor, raise the temperature to 200°C for ventilation reaction, and simulate the composition of the flue gas as SO 2 520ppm, O 2 5%, H 2 O 3%, N 2 The balance, the gas flow rate is 310ml / min, the desulfurization time is 38min, the...

Embodiment 3

[0025] Add activated carbon to the attapulgite powder with a particle size of 45 μm. The amount of activated carbon added is 35% of the weight of the attapulgite. After mixing evenly, add an appropriate amount of water to stir into a paste, put it into a molding machine, and first place it in an oven. Dry at 105°C for 5 hours, and then bake at 400°C for 3 hours in a nitrogen atmosphere to make a carrier; put the prepared carrier into 0.7mol / L Ce(NO 3 ) 3 In the solution, use equal volume to immerse for 4 hours, first dry at 60°C for 3 hours, then dry at 105°C for 5 hours, and finally bake at 300°C for 3 hours in a nitrogen atmosphere to obtain a desulfurizer.

[0026]Put 1 gram of the above-mentioned desulfurizer into a fixed-bed reactor, raise the temperature to 250°C for ventilation reaction, and simulate the composition of flue gas as SO 2 520ppm, O 2 5%, H 2 O 3%, N 2 The balance, the gas flow rate is 310ml / min, the desulfurization time is 40min, the desulfurization ...

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Abstract

The invention discloses a preparation, use and reproduction method of a reproducible load type flue gas desulfurization agent, which comprises the following steps: adding activated carbon which accounts for 15 to 60 percent of the weight of attapulgite powder into the attapulgite powder with the grain diameter of 45mum; mixing the materials; adding water for stirring and forming; drying the materials for 3 to 5 hours at 105 DEG C; then, roasting the materials for 2 to 5 hours at 300 to 500 DEG C to obtain carriers; placing the carriers into 0.2 to 1.0mol / L Ce(NO3)3 solution for isometric impregnation for 2 to 6 hours; firstly, drying the materials at 60 DEG C for 3 hours; then, drying the materials at 105 DEG C for 5 hours; finally, roasting the materials for 3 hours in nitrogen gas atmosphere at 200 to 400 DEG C to obtain the desulfurization agents; loading the desulfurization agents into a reaction vessel; introducing normal pressure flue gas at 120 to 300 DEG C, wherein the airspeed is between 600 and 80000h<-1>, the desulfurization rate is between 85 and 92 percent, and the saturated sulfur capacity is between 3.2 and 6.7g / 100g; and loading the inactivated desulfurization agents into the reaction vessel to carry out reproduction in the nitrogen gas atmosphere at the temperature between 250 and 350 DEG C. The desulfurization agent of the invention can solve the problems of low desulfurization rate, few circulation times, high investment, high operation cost and the like of the existing flue gas desulfurization agent, and is applicable to the conditions of discharge temperature and high airspeed of flue gas of industrial coal burning boilers.

Description

technical field [0001] The invention relates to the preparation, use and regeneration method of a flue gas desulfurizer, in particular to a preparation, use and regeneration method of a reproducible load-type flue gas desulfurizer. Background technique [0002] my country is a big energy producer as well as a big energy consumer. Currently, energy consumption accounts for 10% of the world's total. In my country's energy structure system, coal accounts for about 75% of the entire energy structure system, far greater than oil, natural gas and hydraulic power. National SO 2 90% of emissions come from burning coal. Therefore, reducing SO 2 The key to emissions is to control SO in coal-fired flue gas 2 production and emissions. At present, my country has raised the work of preventing and controlling sulfur dioxide pollution from coal combustion to a strategic height, researching and developing the control of SO 2 New methods of pollution have also become a priority. [000...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/81B01D53/50B01D53/96
Inventor 钱运华金叶玲陈静胡涛于鹄鹏固旭张强华吴彩金郑茂松孙新友
Owner HUAIYIN INSTITUTE OF TECHNOLOGY
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