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High-temperature fixed sulfur additive and preparation method thereof

A technology of sulfur-fixing additive and sulfur-fixing agent, which is applied in solid fuel, petroleum industry, fuel and other directions, can solve the problems of poor industrial production and application effect, few sources of high-temperature sulfur-fixing additives, and failure to meet environmental protection requirements. Industrial production, no impact on safe operation, good sulfur fixation effect

Inactive Publication Date: 2010-12-01
重庆南桐矿业有限责任公司选煤厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing products have become less and less suitable for the needs of the market. In order to develop new products, some units have also researched and developed high-temperature sulfur-fixing additives. rate can only reach 47%), SO in boiler flue gas 2 The concentration does not meet the environmental requirements (minimum 1341mg / nm 3 , up to 1845 mg / nm 3 )
At present, high-temperature sulfur-fixing additives have been extensively explored at home and abroad, but most of them only have a certain effect in the laboratory, and the application effect in industrial production is not good, and there are few sources of high-temperature sulfur-fixing additives, the production process is complicated, and the cost is as high as 1,000 yuan / More than tons

Method used

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  • High-temperature fixed sulfur additive and preparation method thereof
  • High-temperature fixed sulfur additive and preparation method thereof
  • High-temperature fixed sulfur additive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A preparation method of high-temperature sulfur-fixing additive, the main component is CaCO 3 , MgCO 3 , with a CaO content of 40% to 50%, and a coal gangue with a MgO content of 2.0% to 5.0%, and the main component is Fe 2 o 3 , Fe 2 o 3 Sulfuric acid plant acid slag with a content of 40% to 50%, and the main component is Al 2 o 3 , Al 2 o 3 Power plant slag with a content of 20-30% and an activity ratio of 70%-75%, and the main component is SiO 2 , SiO 2 After blending sandstone with a content of 80% to 90% (the blending ratio is 70:8:15:7, based on weight ratio), burn at a high temperature of 1400°C for 1.5 hours, and then grind and sieve Classification, the undersize with a particle size of less than 0.1mm is a qualified product, and the oversize with a particle size of more than 0.1mm continues to be returned to the grinding, and 10% of fly ash from a power plant is added to finally produce a high-temperature product with a particle size of ≤0.1mm. Sulf...

Embodiment 2

[0033] A preparation method of high-temperature sulfur-fixing additive, the main component is CaCO 3 , MgCO 3 , with a CaO content of 40% to 50%, and a coal gangue with a MgO content of 2.0% to 5.0%, and the main component is Fe 2 o 3 , Fe 2 o 3 Sulfuric acid plant acid slag with a content of 40% to 50%, and the main component is Al 2 o 3 , Al 2 o 3Power plant slag with a content of 20-30% and an activity ratio of 70%-75%, and the main component is SiO 2 , SiO 2 After blending sandstone with a content of 80% to 90% (the blending ratio is 65:6:22:7, based on weight ratio), burn at a high temperature of 1500 ° C for 3 hours, and then grind and sieve Grading to produce high-temperature sulfur-fixing additives.

Embodiment 3

[0035] A high-temperature sulfur-fixing agent is to first mix the high-temperature sulfur-fixing additive prepared in Example 1 with the quicklime sulfur-fixing agent with a CaO content of 85% according to a mass ratio of 1:3, and then add industrial NaCl with a mass concentration of 6%. The salt solution is dehydrated and dried in air at 23°C for 3 hours to obtain a high-temperature sulfur-fixing agent.

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Abstract

The invention relates to a high-temperature fixed sulfur additive. The additive comprises the following components in percentage by weight: 2.90 to 3.50 percent of Fe, 25.0 to 30.00 percent of SiO2, 10.90 to 13.00 percent of Al2O3, 52.00 to 55.00 percent of CaO and 1.50 to 3.00 percent of MgO. A high-temperature sulfur fixing agent is prepared by mixing the high-temperature fixed sulfur additive and a limestone sulfur fixing agent or a quicklime sulfur fixing agent in a mass ratio of 1:2.5-3.5. The high-temperature fixed sulfur additive has the advantages of reliable raw material source, capability of meeting the requirement by obtaining materials from local sources since areas producing and using the high-temperature sulfur fixing additive are generally rich in coal and associated resources, low cost, simple production process, convenient industrial production, low production cost, no toxicity, no metallic corrosion, no effect on safe running of a boiler, small particle size, full contact with coal, sulfur fixing rate of up to 70 percent (combustion temperature is 1,700 DEG C) when used on a chain boiler and no change in combustion characteristic and sulfur fixing effect after being piled in the open air for half a month.

Description

technical field [0001] The invention relates to a sulfur-fixing additive and a preparation method thereof, in particular to a high-temperature sulfur-fixing additive and a preparation method thereof. Background technique [0002] The average sulfur content of steam coal in my country is 1.15%, among which the southwest region is the highest, with an average total sulfur of 2.43%, and high-sulfur coal (total sulfur greater than 3.00%) accounts for 43.61% of resources, and medium-high sulfur coal (total sulfur 2.00- 3.00%) also accounted for 17.40%, and the sum of the two exceeded 60%. The direct burning of a large amount of high-sulfur coal has already had a great impact on the industrial and agricultural production and ecological environment in Southwest China. [0003] In recent years, in order to control coal-fired SO 2 Emissions, from the mechanism research of desulfurization and sulfur fixation to practical application, have achieved a lot of achievements, but the real l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L9/10
Inventor 杨江清何青松邓燕平罗骏
Owner 重庆南桐矿业有限责任公司选煤厂
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