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High temperature composite sulfur fixing agent

A sulfur-fixing agent and high-temperature technology, which is applied to the separation of dispersed particles, chemical instruments and methods, and separation methods, can solve problems such as poor compressive strength, unsatisfactory combustion performance, and high cost, and achieve the effect of improving compressive strength

Inactive Publication Date: 2005-03-16
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, no matter how good the announced effect is, due to the high cost of sulfur-fixing agent or the limitation of combustion performance, it is known that the actual sulfur-fixing efficiency of coal combustion does not exceed 60%. If it is used in briquettes, the actual sulfur-fixing efficiency is not More than 70%, and its compressive strength is poor, and the combustion performance is not ideal;; Calcium spraying in the furnace - tail humidification and desulfurization rate is not higher than 75%

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The raw coal used by a chemical fiber company has a sulfur content of 0.75%. The high-temperature composite sulfur-fixing agent is formulated as follows: limestone powder 93%, bauxite 5%, additives A and B are 1.0% respectively, where A is potassium feldspar and B is lapis lazuli. Mix 20,000 kg of raw coal with a sulfur content of 0.75% and 1,432 kg of high-temperature composite sulfur-fixing agent. Combust the coal with the same sulfur content without adding any sulfur-fixing agent and the same sulfur-content coal with calcium-based common sulfur-fixing agent in the same coal-fired boiler, and measure the sulfur dioxide content respectively. emission concentration. The test results are: the average sulfur dioxide emission concentration of coal-fired coal without any sulfur-fixing agent is 1395.7 mg / m3, and the average sulfur dioxide emission concentration of coal-fired coal with calcium-based common sulfur-fixing agent is 977.8 mg / m3 m, and the average emission conce...

Embodiment 2

[0023] The sulfur content of the raw coal used in a metallurgical plant is 1.28%. The high-temperature composite sulfur-fixing agent ratio is: carbide slag 88%, bauxite 8%, auxiliary additives A and B each 2%, where A is sericite and B is lapis lazuli. Mix 2,000 kg of raw coal with a sulfur content of 1.28%, 235 kg of high-temperature composite sulfur-fixing agent, and clay as the balance, and then add appropriate amount of water to process the shaped coal. Combust the briquettes and the processed ordinary briquettes with the same sulfur content without adding high-temperature composite sulfur-fixing agent in a fixed number in a fixed return air shield, and measure the emission concentration of sulfur dioxide respectively. The test results are: the average sulfur dioxide emission concentration of ordinary briquettes is 1852.5 mg / m3, while the average sulfur dioxide emission concentration of high-temperature composite sulfur-fixed briquettes is 407.6 mg / m3, and the sulfur fixat...

Embodiment 3

[0025] The sulfur content of the raw coal used in a paper mill is 0.64%, and the mass ratio of the high-temperature composite sulfur fixative is: limestone powder 87%, bauxite 10%, additives A and B each 1.5%, where A is potassium carbonate and B is strontium feldspar. After mixing evenly, spray 3,000 kg of high-temperature composite sulfur-fixing agent evenly into the coal-fired furnace from the four corners of the upper part of the furnace. Compared with the combustion of pulverized coal with the same sulfur content without adding high-temperature composite sulfur-fixing agent, the average emission concentration of sulfur dioxide was determined to be 198.7 mg / m3 and 1056.3 mg / m3, respectively, and the sulfur-fixing rate was 81.19%.

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PUM

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Abstract

The invention relates a kind of high-temperature complex fixing sulfur, which can decline the pollution of sulfur dioxide in industrial exhaust gas and decline endangerment of acid rain. The invention can be achieves by that compound with a stated proportion of fixing sulfur, an additive and an aid additive and then elaborate by the certain procedure. In the condition of 1200 centigrade, the addition of fixing sulfur can make the fix sulfur effect of burning coal up to 67%, make the fix sulfur effect of type coal up to 78%, and make the fix sulfur of calcium puff in kiln up to more than 80%. Moreover, the main products of the invention are all composed with native mineral, and it has the predominance of convenient origin, low costs and so on. So it especially has virtual value and potential of extending market.

Description

technical field [0001] The invention relates to the technical field of air pollution control, in particular to a high-temperature composite sulfur-fixing agent capable of reducing sulfur dioxide pollution in industrial waste gas and reducing the harm of acid rain. Background technique [0002] So far, there are more than 20 coal-fired sulfur fixation technologies, all of which have achieved good results in coal-fired sulfur fixation and have played their due role in improving the quality of the atmospheric environment. However, no matter how good the announced effect is, due to the high cost of sulfur-fixing agent or the limitation of combustion performance, it is known that the actual sulfur-fixing efficiency of coal combustion does not exceed 60%. If it is used in briquettes, the actual sulfur-fixing efficiency is not More than 70%, and its compressive strength is poor, and the combustion performance is not ideal;; Calcium spraying in the furnace - tail humidification and ...

Claims

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Application Information

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IPC IPC(8): B01D53/50B01D53/81
Inventor 石林汪碧容陈定盛
Owner SOUTH CHINA UNIV OF TECH
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