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Sludge-based desulfurizer and preparation method thereof

A desulfurizer and sludge technology, applied in separation methods, chemical instruments and methods, dispersed particle separation, etc., can solve the problems of high cost, low sulfur capacity, insufficient mechanical strength, etc., and achieve low cost, high capacity, and simple preparation. Effect

Inactive Publication Date: 2010-09-22
龙澳(天津)生物医药技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The commonly used desulfurization adsorbents in industry include activated carbon, silica gel, molecular sieve, diatomaceous earth, activated alumina, synthetic zeolite, natural zeolite, etc., all of which have problems such as high cost, low sulfur capacity, and insufficient mechanical strength.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1) Dry, grind, and sieve the sludge, retain sludge particles with a particle size range of 1-2.5mm, mix the sludge particles with the activator zinc chloride at a mass ratio of 1:2.5, and heat at 75°C Stir for 2 hours, then dry to constant weight to obtain activated sludge granules, heat the activated sludge granules to 450°C at a heating rate of 15°C / min and keep them warm for 90min, then cool in nitrogen, and then use hydrochloric acid and distilled water at 70°C in sequence Washing and drying to obtain sludge activated carbon;

[0022] 2) Dry the red mud at 70-80°C for 5-8 hours, cool, grind, and sieve to keep particles with a particle size below 2.5mm; prepare a sodium hydroxide solution with a concentration of 1mol / L, and remove the copper soot Mix with sodium hydroxide solution at a mass ratio of 1:10, stir for 2 hours, then dry at 70-80°C for 1-3 hours, cool, grind, and sieve to keep particles with a particle size below 2.5mm; sludge activated carbon , blast fur...

Embodiment 2

[0025] 1) Dry, grind, and sieve the sludge, retain sludge particles with a particle size range of 1-2.5mm, mix the sludge particles with the activator potassium hydroxide at a mass ratio of 1:3, and heat at 70°C Stir for 1.5 hours, then dry to constant weight to obtain activated sludge granules, heat the activated sludge granules to 600°C at a heating rate of 15°C / min and keep them warm for 60min, then cool them in nitrogen, and then use hydrochloric acid and 80°C Washing with distilled water and drying to obtain sludge activated carbon;

[0026] 2) Dry the red mud at 70-80°C for 5-8 hours, cool, grind, and sieve to keep particles with a particle size below 2.5mm; prepare a sodium hydroxide solution with a concentration of 1mol / L, and remove the copper soot Mix with sodium hydroxide solution at a mass ratio of 1:10, stir for 2 hours, then dry at 70-80°C for 1-3 hours, cool, grind, and sieve to keep particles with a particle size below 2.5mm; sludge activated carbon , blast fu...

Embodiment 3

[0029] 1) Dry, grind and sieve the sludge, retain the sludge particles with a particle size range of 1-2.5mm, mix the sludge particles with the activator zinc chloride at a mass ratio of 1:2, and heat at 70°C Stir for 2 hours, then dry to constant weight to obtain activated sludge granules, raise the temperature of activated sludge granules to 500 ℃ at a heating rate of 20 ℃ / min and keep it for 45 minutes, then cool in nitrogen, and then use hydrochloric acid and distilled water at 75 ℃ in sequence Washing and drying to obtain sludge activated carbon;

[0030]2) Dry the red mud at 70-80°C for 5-8 hours, cool, grind, and sieve to keep particles with a particle size below 2.5mm; prepare a sodium hydroxide solution with a concentration of 1mol / L, and remove the copper soot Mix with sodium hydroxide solution at a mass ratio of 1:10, stir for 2 hours, then dry at 70-80°C for 1-3 hours, cool, grind, and sieve to keep particles with a particle size below 2.5mm; sludge activated carbo...

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PUM

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Abstract

The invention discloses a sludge-based desulfurizer and a preparation method thereof. A sludge agent consists of 60 to 80 percent of active ingredient, 12 to 20 percent of binder and 8 to 20 percent of pore expanding agent. The preparation method comprises the following steps of: preparing activated sludge particles from sludge particles and an active agent in a mass ratio; performing thermal treatment on the activated sludge particles, cooling the activated sludge particles subjected to thermal treatment in nitrogen and treating the cooled activated sludge particles to obtain sludge active carbon; mixing the sludge active carbon, blast furnace iron slag, red mud, quicklime and copper ash to obtain the active ingredient; and mixing the active ingredient, the binder and the pore expanding agent, grinding the mixture, adding deionized water into the ground mixture, performing extrusion molding on the mixture, drying the molded mixture and baking the dried mixture to obtain the sludge-based desulfurizer. The sludge-based desulfurizer of the invention has the advantages of high degree of purification, high sulfur dioxide adsorption capacity, simple preparation and low cost.

Description

technical field [0001] The invention relates to a desulfurizer for removing sulfur dioxide gas using excess sludge as a raw material and a preparation method thereof, which belongs to the field of gas purification and desulfurizer preparation, and is suitable for removing sulfur dioxide at medium and low temperatures. Background technique [0002] With the increase of population and the development of industrialization, a large number of pollutants enter the atmospheric environment, change the climate, damage the ecology, and threaten human life and production safety. my country's energy consumption is dominated by coal, and air pollution is mainly caused by smoke and SO 2 The most serious one is that the total amount of sulfur dioxide emissions has reached more than 20 million tons per year. Research and development of practical sulfur dioxide removal technologies suitable for my country's national conditions are of great significance to the control of environmental polluti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/50
Inventor 李依丽田婧张书景李晶欣孙禹钱文娇王姚
Owner 龙澳(天津)生物医药技术有限公司
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