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Cold rolling emulsion odor gas purifying device and method

A gas purification device and emulsion technology, applied in chemical instruments and methods, combined devices, separation methods, etc., to achieve the effects of increasing the concentration of reactants, improving reaction efficiency, and reducing pollutant load

Active Publication Date: 2017-01-11
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0007] Aiming at the problem of the emulsified liquid odor gas produced in the cold rolling process, the present invention provides a device and method for purifying the emulsified liquid waste gas produced in the cold rolling process, and the cold rolling process The odor gas in the middle mist removal system is further purified to reduce the odor concentration and volatile organic compound emission concentration of the final exhaust odor gas

Method used

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  • Cold rolling emulsion odor gas purifying device and method

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Embodiment

[0043] The exhaust gas produced by a cold rolling process of Baosteel Co., Ltd. is collected by the mist removal system of the rolling mill and then discharged. The oil mist content of the exhaust gas is ≤20mg / m 3 , the temperature is 20-40°C, the humidity is 60-95%, and the odor concentration is 550-977 (dimensionless), which meets the existing national "Odor Pollutant Emission Standard (GB14554-93)", but under certain meteorological conditions, the emission There will still be a perceivable smell of emulsion (smell) in residential areas around the mouth.

[0044] The oil mist content of the emulsion exhaust gas is less than 1 μg / m after passing through the centrifugal demister device 2 and the filter mechanical demister device 3 3 , the catalytic packing material 4 is an adsorption material and a catalyst, wherein the adsorption material is an activated carbon-based adsorption material with a carbon tetrachloride adsorption capacity of 100 to 120%, and the catalyst is Fe 2 ...

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Abstract

The invention relates to a cold rolling emulsion waste gas purifying device and a cold rolling emulsion waste gas purifying method. The device comprises a demisting device, a concentration enrichment reactor (6), an oxidizing agent generation device (7), a discharged liquid collection device (8), a blower (9), and an exhaust vent (10). According to the invention, odor gas produced by the emulsion is subjected to oil mist removing; the odor gas is oxidized; odor substances are removed; and the exhaust is vented, such that the odor gas in a mist discharge system in a cold rolling process is further purified. The odor concentration and volatile organic matter emission concentration of the finally discharged odor gas are reduced.

Description

[0001] Technical field: [0002] The invention belongs to the technical field of environmental protection, and in particular relates to a device and a method for purifying odorous gas generated by emulsion waste gas during cold rolling. Background technique [0003] In the process of cold rolling, it is necessary to apply emulsion, and when the emulsion evaporates and partially cracks on the surface of high-temperature strip steel, it will form odor gas, causing odor in the surrounding air. The composition of this odorous gas is complex, and the mass concentration is not high. It is mainly composed of relatively large molecular weight hydrocarbons and semi-oxidized aldehydes, ketones and alcohol esters. [0004] Generally, there is an oil mist filter in the mist removal system of the rolling mill in the cold rolling industry, but there is no equipment for removing odor gas. The unit stipulates the emission limit of oil mist, but there is no restriction on the emission of odor...

Claims

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Application Information

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IPC IPC(8): B01D53/86B01D53/76B01D53/44B01D50/00
Inventor 倪建春陈健刘道清陈砚秋殷玫婕陈铨张明吴昊黄雪松胡义纯
Owner BAOSHAN IRON & STEEL CO LTD
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