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The functions of several data in the switch room are as follows: The switch room serves as a location for coke oven heating, direction switching, and the collection of various important data. It enables direct and indirect reflection of the heating status of the coke ovens at different times, as well as the monitoring of any potential abnormalities. Below are some insights regarding these data. 1. Collector duct pressure. Furnace 1 operates at 80–100 Pa, while Furnace 2 operates at 90–110 Pa. These values are determined based on the fluctuation range of the gas collection pipes when the pressure at the bottom of the carbonization chamber beneath the gas intake pipe is around 5 Pa at the end of coking; within this range, it is possible to maintain a positive pressure in all areas of each carbonization chamber during different coking phases. If the pressure in the gas collection duct is too low, it causes a negative pressure in the carbonization chamber, allowing air to be drawn into the furnace through the furnace door. This can lead, in mild cases, to explosions at the furnace door, while in more severe cases, it can cause the coke inside the carbonization chamber to burn, damaging the furnace walls and affecting the quality of the gas produced. If the pressure in the gas collection duct is too high, it can cause smoking and flaming at the furnace door, deteriorate the operating conditions at the furnace top, and result in the loss of waste gas. 2. Pressure or flow rate of the main gas pipeline. The main pipe pressure is required to remain at a certain value during different coking times; this value is determined based on past and current furnace temperatures. Based on this pressure, the fire operator adjusts the air volume throughout the furnace, as well as the combustion of gas in the flue channels and vertical flues, to achieve an optimal level. If the main pipe pressure remains unstable for an extended period, it directly affects the furnace temperature, resulting in a decrease in the K value. 3. Flue draft. The proper combustion of gas in the vertical flue depends, apart from maintaining a constant gas flow rate, mainly on an appropriate amount of air and the smooth removal of exhaust gases. The \"pushing force\" required for the air entering the furnace and the exhaust gases leaving it is provided by the side flues located on the machine and coke sides; too little or too much of this force has a significant impact on the combustion of the gas. If the force is too great, the flame in the vertical flue burns abnormally and the negative pressure at the top of the furnace increases; over time, this can even lead to gas bypassing, resulting in flames appearing below the inclined channels and high temperatures in the roof area. If the force is too low, the positive pressure at the top of the furnace rises, which (1) makes it difficult to monitor the combustion process, and (2) disrupts the pressure distribution between the vertical flue and the carbonization chamber, allowing gases from the vertical flue to flow back into the carbonization chamber through gaps in the bricks or cracks. In this process, the graphite present in these gaps is burned, leading to an increase in leakage points, a problem that becomes particularly evident after adding coal.