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【What is a tunnel furnace? Why does the tunnel furnace use nitrogen?】

  • 来源:beat365官方网站
  • 发布日期:2019-11-28
  • 访问量:63

What is a tunnel furnace?

Tunnel furnace (grain processing) is a tunnel construction industrial equipment for food baking based on heat transfer, heat convection and radiation sources. The wall of the oven is usually very long, at least 6 meters, 60-80 meters long. The baking room is constructed in a narrow tunnel with a total width of 80 cm to 140 cm. There is this continuous transportation system software in tunnel construction. During food baking, the relative speed between the food chain plate, steel chain or conveyor belt and the electric heating material or direct combustion rod is caused. And then carry out the work of even baking and transportation. This kind of barbecue box can produce continuously, produce efficiently, save human resources, and bake steadily. The tunnel furnace is mainly used in the food industry of industrial production, characterized by a large number of continuous or intermittent baking. Generally, the maximum power input is more than 24kw, which is actually operated by the staff.

Generally, there are electric heating tunnel furnace, natural gas tunnel furnace or gas tunnel furnace and so on. According to the total output of tunnel furnace customers, the manufacturer can customize the length and width at will. Application: toast bread (meal toast, nourishing toast, etc.), birthday cake, cookie, small heart, yolk pie, mid autumn moon cake, etc The tunnel furnace is a continuous baking equipment, which can be configured with production line production. It has the characteristics of high production efficiency, saving human resources and stable baking quality.

According to different baking time regulations of various commodities, intelligent system operation can be carried out according to PLC full intelligent automatic control system. Drive system AC motor speed control, can maintain stepless speed change It can prepay about 15 groups of main parameters, and keep the actual operation of automation technology.

Why does the tunnel furnace use nitrogen?

1. Nitrogen is a rare gas with good maintenance characteristics. The maximum oxygen content can be less than 200ppm, but the total flow is large.

2. Under high temperature, hydrogen or benzoic acid gas can not only consume CO2 according to exothermic reaction to produce oxygen free welding atmosphere, but also passivate and repair the stainless steel oxidized by air according to reduction reaction, which has cleaning effect. The oxygen content can be less than 50ppm.

3. For the reflow soldering furnace in the natural environment of general gas and nitrogen, the steel parts must be cleaned after electric welding to remove the welding fluid, sediment and compound, while the hydrogen reflow soldering furnace is not required;

4. The bubble / crack rate on the welding surface of electric welding is more than 15% ~ 25% in gas reflow soldering furnace, 5% ~ 15% in nitrogen reflow soldering furnace and less than 5% in hydrogen. Visible hydrogen reflow soldering furnace is the best.

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