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Treatment method for automobile coating waste gas

A treatment method and exhaust gas technology, applied in separation methods, chemical instruments and methods, flocculation/sedimentation water/sewage treatment, etc., can solve problems such as low technical efficiency, high cost, unstable operation, etc., and achieve high operational stability, Easy to operate, no secondary pollution effect

Active Publication Date: 2014-05-14
徐炎华 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a stable and efficient method for treating automobile painting waste gas in view of the problems of low efficiency, high cost and unstable operation of the current automobile painting waste gas treatment technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The spray density of the spray scrubber is 1m 3 / (m 2 , h), wherein the flocculant is polyaluminum chloride, and the concentration is 5‰ (mass fraction); the preferred loaded photocatalytic high-voltage electrode of the DDBD device is TiO 2 / Ni, the diameter is 0.3mm, the power is 3kw; the amount of mixed oxygen is 15% of the total exhaust gas (V / V).

[0025] Paint mist after treatment 45mg / m 3 , toluene 20mg / m 3 , Xylene 32mg / m 3 , Acetone 10mg / m 3 , ethanol 12mg / m 3 . The height of the exhaust pipe is 15m, and the emission complies with the secondary standard of "Integrated Emission Standard of Air Pollutants" (GB16297‐1996).

Embodiment 2

[0027] The spray density of the spray scrubber is 2m 3 / (m 2 , h), wherein the flocculant is polyferric sulfate, and the concentration is 3‰ (mass fraction); the preferred loaded photocatalytic high-voltage electrode of the DDBD device is TiO 2 / Pt, the diameter is 0.1mm, the power is 1kw; the amount of mixed oxygen is 10% of the total exhaust gas (V / V).

[0028] Paint mist after treatment 40mg / m 3 , toluene 28mg / m 3 , Xylene 30mg / m 3 , Acetone 11mg / m 3 , ethanol 10mg / m 3 . The height of the exhaust pipe is 15m, and the emission complies with the secondary standard of "Integrated Emission Standard of Air Pollutants" (GB16297‐1996).

Embodiment 3

[0030] The spray density of the spray scrubber is 3m 3 / (m 2 , h), wherein the flocculant is polyferric chloride, and the concentration is 1‰ (mass fraction); the preferred loaded photocatalytic high-voltage electrode of the DDBD device is SnO / Ni, with a diameter of 0.4mm and a power of 2kw; the amount of mixed oxygen It is 30% (V / V) of the total amount of exhaust gas.

[0031] Paint mist after treatment 38mg / m 3 , toluene 23mg / m 3 , Xylene 28mg / m 3 , Acetone 8mg / m 3 , ethanol 10mg / m 3 . The height of the exhaust pipe is 15m, and the emission complies with the secondary standard of "Integrated Emission Standard of Air Pollutants" (GB16297‐1996).

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Abstract

The invention belongs to the field of waste gas treatment and relates to a treatment technology for automobile coating waste gas. A combined technology consisting of spraying washing and a photoelectric synergic low-temperature plasma catalysis technology is adopted to treat the automobile coating waste gas. The automobile coating waste gas firstly enters a spraying washing tower for pretreatment, and the waste gas is in full contact with water; paint mists are fully absorbed by water with a flocculating agent to form paint resides; the rest of the waste gas containing organic matters is mixed with a certain amount of oxygen and then enters a double-dielectric barrier discharge reactor; a high-voltage electrode is a load type photocatalysis material; plasmas and photocatalysis are synergically used for degrading the organic matters. The method disclosed by the invention is suitable for purification treatment on a large amount of automobile coating waste gas with the low and medium concentration; the purification efficiency of the treated paint mists is up to over 95 percent; the purification efficiency is over 90 percent; the treated automobile coating waste gas meets the secondary standard of the Integrated Emission Standard of Air Pollutants (GB16297-1996).

Description

technical field [0001] The invention belongs to the field of waste gas treatment and relates to a treatment method for automobile painting waste gas. Background technique [0002] In the automobile manufacturing process, the painting section is the link that produces the most "three wastes". Among them, the exhaust gas from painting is the main part of the "three wastes" in painting, especially the painting, leveling and drying of the workpiece. A large amount of organic waste gas will be generated in these processes (VOC) and overspray paint mist. Due to lack of people's awareness, backward treatment technology or high treatment costs, these exhaust gases are often discharged directly without treatment, seriously affecting air quality, animal and plant growth, and human health. As early as 2006, my country promulgated and implemented HJ / T293 "Clean Production Standards for Automobile Manufacturing (Painting)", which clarified the environmental management indicators and emp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D47/06C02F1/52B01D53/86B01D53/76
Inventor 徐炎华于鹏
Owner 徐炎华
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