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Harmless and efficient treatment method for nitric oxide in industrial waste gas

A technology for industrial waste gas and nitrogen oxides, which is applied in gas treatment, chemical instruments and methods, separation methods, etc., can solve the problems of poor nitrogen oxide treatment effect, etc. Good catalytic effect

Inactive Publication Date: 2020-05-08
安徽掌榕网科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method of the invention has an absorption efficiency of up to 91% for nitrogen oxide waste gas, which maximizes the treatment of waste gas, simplifies the operation steps, and makes the absorbed liquid easier to recover and process, and uses urea solution to oxidize nitrogen The treatment of nitrogen oxides is a general method to treat nitrogen oxides, but its treatment effect on nitrogen oxides is not good, and a large part of nitrogen oxides is discharged without treatment.

Method used

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  • Harmless and efficient treatment method for nitric oxide in industrial waste gas
  • Harmless and efficient treatment method for nitric oxide in industrial waste gas
  • Harmless and efficient treatment method for nitric oxide in industrial waste gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A harmless and efficient treatment method for nitrogen oxides in industrial waste gas is as follows:

[0032] The industrial exhaust gas enters the heater through the intake pipe to heat up, and then the reducing agent (20% urea aqueous solution) in the thermal reducer is used to reduce the nitrogen oxides in the exhaust gas to obtain a mixture doped with nitrogen. After the gas and the mixed gas are condensed and cooled by the condenser, they are catalytically degraded by the first catalytic converter and the second catalytic converter in turn. The inner wall of the first catalytic converter is equipped with an ultraviolet lamp, and the interior is equipped with TiO 2 / g -C 3 N 4 Composite catalyst with plasma generator and CeO in the second catalyst 2 -CuO / γ-Al 2 o 3 , and then return to the intake pipe through the circulation pipe provided with a fan and a check valve, and repeat the above processing steps until it passes the test, and then it is discharged from ...

Embodiment 2

[0036] A harmless and efficient treatment method for nitrogen oxides in industrial waste gas is as follows:

[0037] The industrial exhaust gas enters the heater through the intake pipe to heat up, and then the reducing agent (liquid ammonia) in the thermal reducer is used to reduce the nitrogen oxides in the exhaust gas to obtain a mixed gas doped with nitrogen. The mixed gas is condensed After the device condenses and cools down, the first catalytic converter and the second catalytic converter are catalytically degraded in turn. The inner wall of the first catalytic converter is equipped with an ultraviolet lamp and the interior is equipped with TiO 2 / g -C 3 N 4 Composite catalyst with plasma generator and Na-Rh / γ-Al in the second catalyst 2 o 3 , and then return to the intake pipe through the circulation pipe provided with a fan and a check valve, and repeat the above processing steps until it passes the test, and then it is discharged from the exhaust pipe, which is al...

Embodiment 3

[0041] A harmless and efficient treatment method for nitrogen oxides in industrial waste gas is as follows:

[0042] The industrial exhaust gas enters the heater through the intake pipe to heat up, and then the reducing agent in the thermal reducer (urea aqueous solution with a mass concentration of 30%) is used to reduce the nitrogen oxides in the exhaust gas to obtain a nitrogen-doped mixture. After the gas and the mixed gas are condensed and cooled by the condenser, they are catalytically degraded by the first catalytic converter and the second catalytic converter in turn. The inner wall of the first catalytic converter is equipped with an ultraviolet lamp, and the interior is equipped with TiO 2 / g -C 3 N 4 Composite catalyst with plasma generator and Ag / γ-Al in the second catalyst 2 o 3 , and then return to the intake pipe through the circulation pipe provided with a fan and a check valve, and repeat the above processing steps until it passes the test, and then it is d...

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PUM

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Abstract

The invention provides a harmless and efficient treatment method for nitric oxide in industrial waste gas, and relates to the technical field of waste gas treatment, industrial waste gas enters a heater through a gas inlet pipeline to be heated; by reducing nitric oxide in the waste gas by using a reducing agent in a thermal reducer, a nitrogen-doped mixed gas is obtained; the mixed gas is condensed and cooled through a condenser, then enters a first catalytic converter and a second catalytic converter for catalytic degradation in sequence, and returns to the gas inlet pipeline through a circulating pipeline provided with a fan and a check valve; the processing steps are repeated until the detection is qualified, and then the gas is discharged from an exhaust pipeline which is also provided with a fan; according to the method, the treatment effect on the nitric oxide in the industrial waste gas is good, the purifying rate achieves more than 99%, the treatment efficiency is high, and the method is suitable for large-scale promotion and application.

Description

technical field [0001] The invention relates to the technical field of waste gas treatment, in particular to a harmless and efficient treatment method for nitrogen oxides in industrial waste gas. Background technique [0002] Industrial waste gas refers to the general term for all kinds of pollutant gases that are discharged into the air during fuel combustion and production processes in the factory area. These exhaust gases include: carbon dioxide, carbon disulfide, hydrogen sulfide, fluoride, nitrogen oxides, chlorine, hydrogen chloride, carbon monoxide, sulfuric acid, lead mercury, beryllium compounds, soot and productive dust, which will pollute the air when discharged into the atmosphere. Some pathways enter the human body through the respiratory tract, some directly cause harm, and some have a cumulative effect, which will more seriously endanger human health, and different substances will have different effects. [0003] The nitrogen oxides mainly include nitrous oxi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/75B01D53/86B01D53/56B01D53/78
CPCB01D53/007B01D53/75B01D53/78B01D53/8628B01D2251/2062B01D2251/2067B01D2255/1021B01D2255/1025B01D2255/104B01D2255/2027B01D2255/2065B01D2255/20707B01D2255/2073B01D2255/20738B01D2255/20761B01D2255/2092B01D2255/802B01D2259/804
Inventor 吴宪
Owner 安徽掌榕网科技有限公司