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Integrated advanced-treatment process for nitration and dioxin elimination of incineration tail gas

A dioxin removal and advanced treatment technology, which is applied in gas treatment, chemical instruments and methods, separation methods, etc., can solve problems such as unstable operation, high cost, and low efficiency of dioxin treatment technology, and achieve operational stability High, easy to operate, the effect of increasing density

Pending Publication Date: 2017-08-11
NJTECH ENVIRONMENT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide a stable, efficient, low A cost-effective process for treating nitrogen oxides and dioxins in the tail gas of rotary kiln incineration

Method used

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  • Integrated advanced-treatment process for nitration and dioxin elimination of incineration tail gas
  • Integrated advanced-treatment process for nitration and dioxin elimination of incineration tail gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The photocatalyst supported on the inner wall of the low-voltage electrode of the high-energy discharge reactor device is TiO 2 / Ni, the diameter of titanium wire at the high-voltage end is 0.2mm, the frequency is 500Hz, the power is 3Kw; the amount of mixed ozone is 10% of the total amount of exhaust gas (V / V), and the spray density of the scrubber is 2m 3 / (m 2 , h), using 10 wt% NaOH solution.

[0033] Treated paint fog nitrogen oxides 90mg / m 3 , Dioxin 0.0252ng / m3, the discharge complies with the "Pollution Control Standards for Hazardous Waste Incineration" (GB18484-2014).

Embodiment 2

[0035] The photocatalyst supported on the inner wall of the low-voltage electrode of the high-energy discharge reactor device is TiO 2 / Pt, the diameter of titanium wire at the high-voltage end is 0.4mm, the frequency is 1000Hz, the power is 1Kw; the amount of mixed ozone is 5% of the total amount of exhaust gas (V / V), and the spray density of the scrubber is 4m 3 / (m 2 , h), using 8wt% Ca(OH) 2 solution.

[0036] Treated paint fog nitrogen oxides 110mg / m 3 , Dioxin 0.0312ng / m 3 , and the discharge complies with the Pollution Control Standard for Hazardous Waste Incineration (GB18484-2014).

Embodiment 3

[0038] The photocatalyst loaded on the inner wall of the low-voltage electrode of the high-energy discharge reactor device is SnO / Ni, the diameter of the titanium wire at the high-voltage end is 0.1mm, the frequency is 600Hz, and the power is 2Kw; the amount of mixed ozone is 8% (V / V) of the total amount of exhaust gas, The spray density of the scrubber is 3m 3 / (m 2 , h), using 12 wt% KOH solution.

[0039] Treated nitrogen oxides 100mg / m 3 , Dioxin 0.0282ng / m 3 , and the discharge complies with the Pollution Control Standard for Hazardous Waste Incineration (GB18484-2014).

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Abstract

The invention belongs to the field of waste gas treatment, and relates to an integrated advanced-treatment process for nitration and dioxin elimination of incineration tail gas. According to the integrated advanced-treatment process, the incineration tail gas containing nitric oxides and dioxin are mixed with ozone, the mixture enters an high-energy discharge reactor to be subjected to synergistic treatment of electrochemical catalysis, photocatalysis and ozone catalysis, the treated tail gas enters an alkali washing tower to eliminate the nitric oxides, and accordingly, the nitric oxides and the dioxin are eliminated at the same time. The integrated advanced-treatment process has the advantages that the electrochemical catalysis, the photocatalysis and the ozone catalysis are integrated, the nitric oxides and the dioxin in the incineration tail gas of a rotary kiln are treated, and multiple synergistic catalysis is realized, so that density of free radicals can be improved greatly, and the dioxin can be decomposed thoroughly; NO is oxidized into NO2, and the nitric oxides are turned into nitrate after the treated waste gas is subjected to alkaline washing, so that elimination and purification rate is high, and simplicity and convenience in operation are realized.

Description

technical field [0001] The invention belongs to the field of waste gas treatment, and relates to an advanced treatment process integrating denitrification and dioxin removal of incineration tail gas. Background technique [0002] A large amount of solid waste is likely to be generated in the production process of the chemical industry, such as: distillation still residue, centrifuge mother liquor, spent activated carbon, biochemical sludge, etc. Most of them are hazardous solid waste and need to be sent to the hazardous waste disposal center for centralized disposal. However, with the increasing amount of hazardous waste, the processing capacity of the existing hazardous waste disposal centers is obviously insufficient, and the outlet for enterprise hazardous waste treatment has become a major problem that plagues the development of enterprises. [0003] More and more enterprises build their own incinerators to process their own hazardous waste. On the one hand, it relieves ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/32B01D53/86B01D53/56B01D53/72B01D53/76
CPCB01D53/007B01D53/323B01D53/8631B01D53/8668B01D2255/806B01D2255/802B01D2259/804B01D2259/122B01D2258/0283B01D2251/104
Inventor 李溪王祥沈丽娜
Owner NJTECH ENVIRONMENT TECH CO LTD
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