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Preparation method of novel sludge carbon-based desulfurization and denitrification catalyst

A technology for desulfurization, denitrification, and sludge charcoal, which is applied in chemical instruments and methods, separation methods, dispersed particle separation, etc., can solve the problems of high energy consumption, restrict the development of treatment methods, etc., achieve high activity, simple and easy process steps, Easy to promote the effect of the application

Inactive Publication Date: 2015-12-23
GUANGZHOU INST OF ADVANCED TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the existing reports, most of the existing sludge charcoal carriers are obtained through high-temperature calcination, which has strict requirements on the moisture content of the sludge, and the dewatered sludge needs to be dried and pretreated first, which consumes a lot of energy and greatly limits The development of the treatment method
Using hydrothermal carbonization to obtain sludge charcoal as a catalyst carrier, there are no related reports

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Send domestic sludge with a moisture content of 80% into a hydrothermal reactor, seal it, and heat it for hydrothermal carbonization reaction. The hydrothermal temperature is 250°C, and the reaction time is 180 minutes to obtain a hydrothermal carbonization liquid, which is centrifuged at 3000rpm for solid-liquid Separation and drying at 105°C to obtain sludge charcoal;

[0029] Sludge charcoal and phosphoric acid were mixed and impregnated for 24 hours at a mass ratio of 1:2, dried at 105°C, and sent to a tube incinerator. 2 Under protection, activate at 400°C for 30 minutes and cool down;

[0030] Mix cerium nitrate solution with sludge activated carbon at a mass ratio of 50 mg / g, dry at 105°C after immersion for 24 hours, add celadon powder, the addition amount is 1 / 10 of the sludge activated carbon, and a small amount of deionized water, knead, Squeeze into spherical shape (Φ2mm) and dry to get sludge carbon-based catalyst;

[0031] Desulfurization and denitrifica...

Embodiment 2

[0033] Send domestic sludge with a moisture content of 85% into a hydrothermal reactor, seal it, and heat it for hydrothermal carbonization reaction. The hydrothermal temperature is 300°C and the reaction time is 150 minutes to obtain hydrothermal carbonization liquid, which is centrifuged at 3000rpm for solid-liquid Separation and drying at 105°C to obtain sludge charcoal;

[0034] Mix and impregnate the sludge charcoal and zinc chloride at a mass ratio of 1:2 for 24 hours, dry at 105°C, and send it to a tube incinerator. 2 Under protection, activate at 500°C for 20 minutes and cool down;

[0035] Mix cerium nitrate solution with sludge activated carbon at a mass ratio of 100 mg / g, dry at 105°C after immersion for 24 hours, add celadon powder, the addition amount is 1 / 10 of the sludge activated carbon, and a small amount of deionized water, knead, Squeeze into a columnar shape (Φ2mm×8mm), and dry to get the sludge carbon-based catalyst;

[0036] Desulfurization and denitrif...

Embodiment 3

[0038] Send the printing and dyeing sludge with a moisture content of 80% into a hydrothermal reactor, seal it, and heat it for hydrothermal carbonization reaction. The hydrothermal temperature is 150°C and the reaction time is 120 minutes to obtain a hydrothermal carbonization liquid, which is centrifuged at 3000rpm for solid-liquid Separation and drying at 105°C to obtain sludge charcoal;

[0039] Sludge charcoal and activator (activator is: sulfuric acid: zinc chloride = 2: 1) were mixed and impregnated according to the mass ratio of 1: 2 for 24 hours, dried at 105 ° C, sent to a tube incinerator, and heated in N 2 Under protection, activate at 250°C for 30 minutes and cool down;

[0040]Mix activated sludge charcoal with cerium nitrate solution, the mass ratio is 5mg / g, dry at 105°C after soaking for 24h, add appropriate amount of scallop powder, the addition amount is 1 / 10 of the sludge activated carbon, and a small amount of deionized water, Kneading, extruding into a s...

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Abstract

The invention relates to the technical field of regenerating treatment and recycling utilization of sludge and particularly discloses a preparation method of a novel sludge carbon-based desulfurization and denitrification catalyst. The preparation method disclosed by the invention has the advantages that a carbon product obtained by utilizing a hydrothermal carbonization method has more active sites and stable C-O compounds, and the adsorbing capability is larger than that of high-temperature cracked carbon, and rare-soil metal is used as a catalyst; the novel sludge carbon-based desulfurization and denitrification catalyst has the characteristics of wide source and low price, and the obtained sludge carbon-based catalyst is high in activity and strong in stability; the processing steps are simple and feasible; the catalyst is environmental-friendly, is easy in promotion and application, has industrial application prospect and achieves the purpose of treating-waste-by-waste really.

Description

technical field [0001] The invention relates to the technical field of sludge regeneration treatment and resource utilization, in particular to a preparation method of a novel sludge carbon-based desulfurization and denitrification catalyst. Background technique [0002] SO produced by coal combustion 2 and NO x The emission problem is becoming more and more serious, which has directly affected the development of our country's economy. In 2011, the State Council issued the "Comprehensive Work Plan for Energy Conservation and Emission Reduction during the 12th Five-Year Plan" 2 and NO x emissions are strictly limited. Selective catalytic reduction technology (SCR) stands out among many control technologies, which is based on Al 2 o 3 、TiO 2 , Molecular sieves and other catalysts prepared as supports need NH 3 , CO and other reducing agents, and the cost is expensive, the safety hazard is large, and it is easy to cause secondary pollution; when activated carbon is used...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/10B01D53/86B01D53/60
Inventor 赵丹费颖恒杨昌玉陈顺权
Owner GUANGZHOU INST OF ADVANCED TECH CHINESE ACAD OF SCI
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