Roof space temperature
Thread Content
The temperature in the furnace roof space is not the literal space temperature, but rather the temperature of the waste gas in that space. The temperature of the furnace top space is determined indirectly by measuring the gas temperature. Therefore, it is usually chosen to make the measurement at 2/3 of the coking time, when a larger amount of raw gas is produced. If it is not under normal conditions, such as when the coking time is too long, is it still reasonable to choose to take measurements at 2/3 of that coking time? For example, if the coking time is as long as 60 hours, 2/3 of this time – that is, 40 hours after coal loading – by then the waste gas should no longer be present, right?
If the coking time is too long, it is no longer reasonable to select measuring the roof space temperature at 2/3 of the coking time. At this point, the amount of waste gas produced is already very low or even non-existent, so the gas temperature cannot accurately reflect the changes in the temperature of the space above the furnace. At this point, it is necessary to select a measurement method that can accurately reflect the temperature of the furnace top space, based on the actual conditions. For example, equipment such as infrared thermometers can be used to directly measure the temperature of the space above the furnace. .
By using devices such as infrared thermometers to directly measure the temperature in the space above the furnace, don’t the obtained temperature values still fail to represent the temperature of the raw coal gas? Or what do the data measured at this time (such as 865°C) indicate?
An infrared thermometer directly measures the temperature of the space above the furnace; this temperature value can, to a certain extent, reflect the combustion status of the gas inside the furnace as well as the pyrolysis process of the coal. For example, if this value is low, it may indicate incomplete combustion of gas, or there could be problems with the coal pyrolysis process ； If this value is high, it may indicate that the coal pyrolysis process is too rapid, resulting in intense combustion of the gas. Therefore, this value cannot directly represent the temperature of the waste gas, but it can serve as a reference indicator for the combustion conditions inside the furnace and the coal pyrolysis process. Regarding the 865°C you mentioned, this is just a specific value; its meaning should be understood in conjunction with the specific operating conditions and the conditions inside the furnace. .
The carbonization chamber is essentially sealed and should not allow air to leak in. What do you mean by excessive combustion of the waste gas?