Method for recycling exhaust gas of drying furnace
A technology of exhaust gas recovery and drying furnace, applied in drying, drying machine, heating device and other directions, can solve the problems of large power consumption, adverse effects, unfavorable energy saving, etc., to maintain the temperature in the furnace, reduce heat loss, Energy saving effect
Inactive Publication Date: 2013-08-14
JIANGSU JURONG UNITED COPPER MATERIAL
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Problems solved by technology
[0003] Exhaust gas produced by enamelled flat wire painting and drying contains a large amount of benzene and phenolic gases, which has a heavy odor and has a certain impact on the surrounding environment. Even if a 30-meter-high chimney is used to discharge it, it still floats back to the ground when the air pressure is low, causing adverse effects ; Exhaust gas floating in the air, although the detection is up to standard, but there are still hidden dangers of air pollution
In addition, the paint drying process is continuously maintained at 300-500°C in the catalytic furnace and drying furnace, which consumes a lot of electric energy, and the direct discharge of exhaust gas also takes away a lot of heat, which is not conducive to energy saving
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[0017] A method for recycling tail gas in a drying furnace, see figure 1 , the method utilizes hot air to circulate secondary combustion tail gas, turns irritating and harmful tail gas into harmless and odorless gas and discharges it into the atmosphere, and improves the surrounding environment. The specific steps are as follows:
[0018] 1) Install a circulation pipe 1 on the drying furnace 2, one end of the circulation pipe is connected to the upper part of the drying furnace, and the other end is connected to the bottom of the drying furnace;
[0019] 2) A heating wire 3 is installed at the bottom of the drying furnace at the entrance of the circulation pipeline; the heating wire is a group of electric furnace wires, and a group of electric furnace wires are arranged at the bottom of the drying furnace from bottom to top. An exhaust fan 4 is arranged in the circulation pipeline; the exhaust fan is used to cause negative pressure in the circulation pipeline to guide the tail...
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The invention discloses a method for recycling exhaust gas of a drying furnace. A circulation pipeline is arranged on the drying furnace, one end of the circulation pipeline is connected with the upper portion of the drying furnace, and the other end of the circulation pipeline is connected with the bottom of the drying furnace. Heating wires are arranged on an inlet of the circulation pipeline at the bottom of the drying furnace. An exhaust fan is arranged in the circulation pipeline. The negative pressure in the circulation pipeline is generated through the exhaust fan to lead the exhaust gas in the drying furnace into the drying furnace again, and the exhaust gas is directly ignited by electric furnace wires in the drying furnace. The combustible gas of benzene and phenol in the exhaust gas combusts to release heat, and the pungent harmful gas is changed into harmless and odorless CO2 (carbon dioxide) and water and a little of NO (carbon monoxide). Activated carbon is arranged in an outlet pipeline on the upper portion of the drying furnace, and the gas is filtered in the pipeline before being emitted into the atmosphere. The method utilizes secondary exhaust gas combustion through a heated air circulation to change the pungent harmful exhaust gas into harmless and odorless gas before being emitted into the atmosphere, thereby improving the surrounding environment.
Description
technical field [0001] The invention relates to a tail gas recycling method in the enamelled flat wire processing technology of electric equipment, in particular to a tail gas recycling method in a drying furnace. Background technique [0002] In the production process of enamelled flat wire, a large amount of insulating varnish is required. According to statistics, when 8,000 tons of enamelled flat wire are produced, the amount of insulating varnish used exceeds 500 tons. A large amount of exhaust gas will be generated during the paint drying process of the enamelled flat wire. At present, no measures are taken to directly discharge the exhaust gas into the atmosphere. [0003] Exhaust gas produced by enamelled flat wire painting and drying contains a large amount of benzene and phenolic gases, which has a heavy odor and has a certain impact on the surrounding environment. Even if a 30-meter-high chimney is used to discharge it, it still floats back to the ground when t...
Claims
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Inventor 刘松
Owner JIANGSU JURONG UNITED COPPER MATERIAL