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Composite sulphur dioxide desulfurizing agent and preparation method thereof

A composite material and desulfurization agent technology, applied in chemical instruments and methods, separation methods, dispersed particle separation, etc., to achieve the effect of no secondary pollution, low price, and good desulfurization effect

Inactive Publication Date: 2008-10-29
OCEAN UNIV OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the shortcoming of above-mentioned single use lime mud desulfurization, the purpose of the present invention is to provide a kind of efficient, cheap, easy and simple preparation composite material SO 2 Desulfurizer and its preparation method

Method used

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  • Composite sulphur dioxide desulfurizing agent and preparation method thereof
  • Composite sulphur dioxide desulfurizing agent and preparation method thereof
  • Composite sulphur dioxide desulfurizing agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-4 and comparative example 1

[0023] Mix different percentages of white mud and red mud, then mix them with 5.0% bentonite, 4.9% starch and 0.1% graphite, add water and mix to form a paste, extrude into strips, dry, and finally pass high-temperature roasting treatment , Preparation of several desulfurizers. The white mud and red mud are both 40 mesh, dried at 105°C for 6 hours, the roasting temperature is 500°C, and the roasting time is 2 hours. The prepared desulfurizer was subjected to desulfurization activity evaluation test, and the results are shown in Table 3.

[0024] Table 3 Desulfurization effects of desulfurizers with different ratios (mass ratios)

[0025]

[0026] Experimental conditions: temperature: 400℃; space velocity: 1200h -1 ; SO 2 Concentration: 6290mg / m 3 (2200ppm); O 2 : ~5%; H 2 O(g): 8%.

[0027] It can be seen from the table that when there is only white mud and no red mud, the sulfur capacity of the desulfurizer is the smallest and the desulfurization effect is not good; when the wh...

Embodiment 5-8 and comparative example 2

[0029] Mix the white mud and red mud at 60% and 30% respectively, and then add 5.0% bentonite, 4.9% starch, and 0.1% graphite. After mixing, add water and mix into a paste, extruded into a strip, dried, and finally passed high temperature. In the roasting process, several desulfurizers are prepared according to the different meshes of the white mud and red mud. Among them, it was dried at 105°C for 6 hours, the calcination temperature was 400°C, and the calcination time was 2 hours. The meshes of the white mud and red mud were 16, 40, 60, 80, and 100 meshes respectively. The prepared desulfurizer is subjected to desulfurization activity evaluation test. The results are shown in Table 4.

[0030] Table 4 Desulfurization effect of desulfurizers prepared with different meshes

[0031]

[0032] Experimental conditions: temperature: 400℃; space velocity: 1200h -1 ; SO 2 Concentration: 6290mg / m 3 (2200ppm); O 2 : ~5%; H 2 O(g): 8%

[0033] It can be seen from the table that as the numbe...

Embodiment 9-12

[0035] Mix the white mud and red mud at 60% and 30% respectively, then add 5% different binders, 4.9% starch as a pore former, mix with 0.1% graphite, add water and mix into a paste, extrude Forming, drying, and finally high-temperature roasting treatment to prepare several desulfurizers. The white mud and red mud are both 40 mesh, dried at 105°C for 6 hours, and the roasting temperature is 500°C and the roasting time is 2 hours. The binders are kaolin, bentonite, clay, and diatomite. The prepared desulfurizer is subjected to desulfurization activity evaluation test. The results are shown in Table 5.

[0036] Table 5 Comparison of desulfurization effects of desulfurizers prepared with different binders

[0037]

[0038] Experimental conditions: temperature: 400℃; space velocity: 1200h -1 ; SO 2 Concentration: 6290mg / m 3 (2200ppm); O 2 : ~5%; H 2 O(g): 8%

[0039] It can be seen from the table that the binder has a great effect on increasing the sulfur capacity of the desulfurize...

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Abstract

The invention discloses a desulphurizer for sulfur dioxide in composite material, which is characterized in that the desulphurizer comprises the following compositions in a mass percentage of 50- 80% of white mud in an alkali factory, 10-40% of red mud in a steel plant, 5.0- 8.0% of binder, 3.0% - 8.0% of pore-forming agent and 0.1- 1.0% of lubricant. A preparation method is as follows: firstly, the white mud in the alkali factory and the red mud in the steel plant are smashed into a particle above 40 meshes and are mixed with the binder, the pore-forming agent and the lubricant in a proportion above-mentioned; and then the water is added to mix evenly into a pasty state for the extrusion molding and the drying; finally the desulphurizer is obtained by high-temperature roasting. The invention has the advantages that industrial waste material such as the white mud and the red mud are utilized to prepare the desulphurizer which has the advantages of good desulphurizing effect, extensive material source, low price and no secondary pollution; the products of desulphurization can also be used for building sea dams and paving, etc., thereby being extensively used for the desulphurization and the purification of exhaust gas in a coal-fired power plant, a coal-burning boiler and a coal-fired furnace in the environmental protection industries.

Description

Technical field [0001] The invention relates to a desulfurizing agent used in the flue gas desulfurization industries such as coal-fired power plants, coal-fired boilers and coal-fired kilns, and a preparation method thereof, and more specifically to a preparation method using alkali plant white mud and steel plant red mud SO 2 Desulfurizer and its preparation method. Background technique [0002] According to reports, in 2005 China’s SO 2 The total emissions of up to 25.5 million tons, ranking first in the world. An increase of 27% over 2000, and an increase of 1.8% in 2006 over 2005. my country's atmospheric SO 2 The capacity index is 474 tons / year, which actually exceeded 4.6 times by 2006. SO 2 The large amount of emissions caused by acid rain and other increasingly serious environmental problems, on January 27, 2005, the State Environmental Protection Administration required the acid rain control area and SO 2 46 non-desulfurized thermal power plants in the control area shal...

Claims

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Application Information

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IPC IPC(8): B01D53/50
Inventor 李春虎张新玲冯丽娟侯影飞于英民
Owner OCEAN UNIV OF CHINA
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