Technological method for color-coating line waste gas treatment

A technology of waste gas treatment and process method, which is applied in the direction of combustion method, surface pretreatment, and device for coating liquid on the surface, etc., which can solve problems such as unreasonable economic efficiency, and achieve the goals of reducing natural gas consumption, stabilizing heat energy, and saving energy Effect

Inactive Publication Date: 2015-11-25
CHINA IRON & STEEL RES INST GRP +1
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

If the products of the production line need a higher drying temperature, it is possible. If the furnace temperature is intentionally increased in order to crack the VOC gas at a high temperature, the economy is not reasonable.

Method used

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  • Technological method for color-coating line waste gas treatment

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Embodiment Construction

[0024] Preferred embodiments of the present invention will be specifically described below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the application and are used together with the embodiments of the present invention to explain the principles of the present invention.

[0025] A kind of process method for the waste gas treatment of color coating line of the present invention can be described by the following steps:

[0026] 1) Pass the waste gas containing organic matter generated by the curing furnace into the waste gas heat exchanger, and preheat the waste gas in the waste gas heat exchanger to above 325°C, which is the ignition temperature of the organic waste gas, to about 400-450°C.

[0027] The initial heat of the exhaust gas heat exchanger comes from the heat obtained by burning natural gas in the catalytic combustion furnace and high-temperature incinerator. Burners are arranged in the high-temperature incinera...

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Abstract

The invention discloses a technological method for color-coating line waste gas treatment. The technological method comprises the steps that waste gas generated in a color-coating line curing oven is preheated to be above the firing point of organic matter waste gas; preheated waste gas is subjected to catalytic combustion; and the waste gas after the catalytic combustion is further burnt at the temperature higher than the temperature of the catalytic combustion fully. The waste gas obtained through the high-temperature burning meets the exhaust gas emission requirement and waste heat can be recycled. According to the technological method, compared with traditional single catalytic combustion, the problems that catalytic combustion is incomplete due to a large amount of waste gas and the waste gas can not be treated after catalyzer poisoning are effectively solved by the combined technology of the catalyzing and the high-temperature burning; compared with a traditional high-temperature burning technology, the temperature of the waste gas is up to 500-550 DEG C due to catalytic burning of the combined technology of the catalyzing and the high-temperature burning; the natural gas amount consumed in the high-temperature burning is reduced by 30%-40% compared with the single high-temperature burning.

Description

technical field [0001] The invention relates to the technical field of waste gas treatment, in particular to a process method for treating waste gas of a color coating line, which is used for purifying the waste gas discharged from a color coating curing furnace. Background technique [0002] In the coating curing stage of the color coating line (color coating production line for metal surfaces such as steel strips), the curing furnace will inevitably produce a large amount of waste gas containing organic matter (VOC, volatileorganiccompounds, volatile organic compounds), VOC is a pollution harmful to human health Substances will also have a great destructive effect on atmospheric ozone, and produce a serious greenhouse effect, endangering the ecological environment. Many color coating lines have not designed VOC waste gas recycling facilities. Although some production lines have taken certain measures, the actual use effect is not good. Environmental pollution around the co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23G7/07B05D3/02
Inventor 俞钢强仲海峰马铁刘灿楼魏文龙陈斌锴王珊孟德亮陈庆舍
Owner CHINA IRON & STEEL RES INST GRP
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