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Synchronous deep purification technology for various pollutants in industrial flue gas

A technology for deep purification and industrial flue gas, which is applied in the fields of air quality improvement, chemical instruments and methods, and separation of dispersed particles. Low operating cost, good environmental benefits, and high oxidation efficiency

Inactive Publication Date: 2012-10-31
大恩(天津)环境技术研发有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are many flue gas purification technologies at home and abroad, mainly including flue gas desulfurization and denitrification technology, whitening technology, PM2.5 capture technology, and persistent toxic pollutant degradation technology. Pollutant removal, low removal efficiency, high investment and operating costs
For flue gas with complex pollutant components and heavy pollution, it is difficult for the above methods to achieve the purpose of simultaneous removal of pollutants. Even if multiple technologies are combined, they will face the problems of complex treatment process, difficult operation, and substantial increase in investment and operating costs. problem

Method used

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  • Synchronous deep purification technology for various pollutants in industrial flue gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The content of each pollutant in the simulated flue gas: SO x : 448.53mg / m 3 , NO x : 369.81mg / m 3 、Hg: 0.862mg / m 3 , VOC (calculated as toluene): 76.55mg / m 3 , Dioxins: 5.238ng I-TEQ / Nm 3 , PM2.5: 3874.34mg / m 3 , the inlet flow rate of the flue gas purification system is set at 6000-8000m 3 / h, flue gas temperature: 140~160℃, treatment time 1~3h.

[0022] The electrolysis of pure water is carried out in a 25L sealed electrolytic cell, the cathode material is aluminum, the anode material is platinum, the voltage is 100v, and 2 254nm ultraviolet lamps are used, and the light intensity is 9200μW / cm 2 . The electrolyzer is connected to the Venturi injection pipe, and its throat position faces the direction of the flue gas, and a three-stage Venturi injection pipe is installed along with the flue gas flow. The oxidized flue gas enters the electrostatic defogging system, and the pollutant content in the purified flue gas is measured as SO x : 6.37mg / m 3 , NO x : ...

Embodiment 2

[0025] The content of each pollutant in the simulated flue gas: SO x : 1500mg / m 3 , NO x : 387.26mg / m 3 、Hg: 0.483mg / m 3 , VOC (calculated as toluene): 46.67mg / m 3 , Dioxins: 2.135ng I-TEQ / Nm 3 , Particles: 3248.83mg / m 3 , the flue gas flow rate is set to 6000 ~ 8000m 3 / h, flue gas temperature: 140~160℃, treatment time 1~3h.

[0026] The electrolysis of pure water is carried out in a 25L sealed electrolytic cell, the cathode material is stainless steel, the anode material is lead, the voltage is 50v, and 2 254nm ultraviolet lamps are used, and the light intensity is 9200μW / cm 2 . The electrolyzer is connected to the Venturi injection pipe, and its throat position faces the direction of the flue gas, and a first-stage Venturi injection pipe is installed along with the direction of the flue gas. The oxidized flue gas enters the baffle defogging system, and the pollutant content in the purified flue gas is measured as SO x : 90.48mg / m 3 , NO x : 6.25mg / m 3 , Hg: 5.4...

Embodiment 3

[0029] The content of each pollutant in the simulated flue gas: SO x : 188.23mg / m 3 , NO x : 318.26mg / m 3 、Hg: 0.318mg / m 3 , VOC (calculated as toluene): 20.58mg / m 3 , Dioxins: 1.311ng I-TEQ / Nm 3, particulate matter: 2984.36mg / m 3 , the flue gas flow rate is set to 4000 ~ 6000m 3 / h, flue gas temperature: 90°C, treatment time 1-3h.

[0030] The electrolysis of pure water is carried out in a 25L sealed electrolytic cell, the cathode material is aluminum, the anode material is graphite, the voltage is 10v, and 2 254nm ultraviolet lamps are used, and the light intensity is 9200μW / cm 2 . The electrolyzer is connected to a gas mixer, and a 2-stage gas mixer is set along with the flue gas flow. The oxidized flue gas enters the cyclone demisting system, and the pollutant content in the purified flue gas is measured as SO x : 18.69mg / m 3 , NO x : 20.14mg / m 3 、Hg: 0.052mg / m 3 , VOC (calculated as toluene): 1.86mg / m 3 , Dioxins: 0.158ng I-TEQ / Nm 3 , Particles: 10.24mg / m ...

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Abstract

The invention relates to a synchronous deep purification technology for various pollutants in industrial flue gas. The steps include enabling pure water to be subjected to electrolyzation and ultra-violet radiation to generate hydroxyl radicals to be fully mixed with flue gas through a gas mixing device, and oxidizing SO2 and NO which are difficultly soluble in water into S03, NO2, N2O3 and N2O5 which are easily soluble in water; oxidizing high-volatility HgO which is difficultly soluble in water into Hg2+ which is easily soluble in water and easy to be attached to particulate matters; performing oxygenolysis on VOC (volatile organic compounds) and Dioxin to form water and CO2, contacting the oxidation products with water sprays in flue gas to be subjected to dissolving and condensation to form liquid drops, removing micro particles and liquid drops in air flow through a demister, and exhausting purified flue gas into the air through a chimney; and taking collected liquid produced in flue gas demisting, precipitating and filtering, and reusing solid and liquid obtained by separation. The synchronous deep purification technology for various pollutants in industrial flue gas has the advantages that hazardous substances such as SO3, SO2, NOx, Hg, VOC, Dioxin and PM 2.5 in flue gas can be removed simultaneously, collected liquid can be reused, the investment and operation costs are low, and the environmental benefits are good.

Description

technical field [0001] The invention discloses a synchronous deep purification technology for multiple types of pollutants in industrial flue gas, which belongs to the field of flue gas purification. Background technique [0002] Coal combustion and garbage incineration are the main sources of air pollution. The smoke and dust, SO 3 , SO 2 , NO x , Hg, VOC, dioxin, PM2.5, etc. will cause serious pollution to the atmospheric environment. According to statistics, in 2008, my country's SO 2 The emissions are 23.212 million tons, NO emissions are 20 million tons, and soot emissions are 9.016 million tons. The emission reduction task is very arduous. [0003] At present, there are many flue gas purification technologies at home and abroad, mainly including flue gas desulfurization and denitrification technology, whitening technology, PM2.5 capture technology, and persistent toxic pollutant degradation technology. The removal of pollutants has low removal efficiency and high ...

Claims

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Application Information

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IPC IPC(8): B01D53/76B01D53/60B01D53/64B01D53/72
CPCY02A50/20
Inventor 张曙光王娟娟杨学东李萍朱雁鸣刘万海刘静伟程熠晴
Owner 大恩(天津)环境技术研发有限公司
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