The structure of the furnace (car bottom furnace)

The press furnace temperature distribution in the furnace along the longitudinal direction is divided into a preheating section, a heating section and a soaking zone; feed end of the furnace temperature lower preheating section, its role is to use the heat of the furnace gas, in order to improve the thermal efficiency of the furnace.
Heating as the main heating segment, the gas temperature is higher, in order to facilitate the rapid heating. Soaking zone is located in the discharge end, the gas temperature and metal material temperature difference is small, to ensure uniform temperature of the charge blank section. Stove for heating small cut fabric blank only warm-up and the heating section. Customary to also install the burner in the furnace for tropical divided furnace segment, in accordance for the number of tropical stove called the one-, two-stage, to five sections, Six-. 50 to 60 years, the mill capacity to increase the length of the pusher-type furnace is limited by the length of the Pusher not be too long, so start at the feed end of the increase for tropical canceled heating preheating section, in order to improve The productivity of the unit hearth area.
Since the 1970s, due to energy needs, but also emerging stepping furnace allows to increase the length of the furnace, and additional heating preheating section, the best hearth yield per unit area of 600 to 650 kg / (m 2 · Time), the heat consumption of approximately (0.3 to 0.5) × 106 kcal / ton.
The continuous heating furnace usually use the fuel gas, heavy oil, or pulverized coal, some lump coal burning. In order to effectively utilize the exhaust heat, preheated air and installed in the flue gas heat exchanger, or install a waste heat boiler.