What is the appropriate value of α?
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In the current situation of production reduction, how much α value should be controlled is appropriate.
It should be based on local experience and seeing that many data do not have exact values.
Each furnace type is different, and the α value is different. For a 4.3m coke oven, between 1.15-1.25 ； For a 5.5m coke oven, it may be between 1.2-1.35, and for a taller oven, it may be between 1.25-1.4. It should depend on the specific heating conditions and actual combustion conditions.
It should be determined according to the actual situation. Generally, there is a fixed reference value, which should be changed according to the actual situation.
It can be determined according to the coking time. Generally, the normal control (1.25) is used. If the coking time is significantly prolonged, the control should be larger.》
The a value is around 1.2, which allows complete combustion of gas and prevents high-temperature accidents. If it is larger, the excess air will cause the furnace temperature to rise rapidly, exceeding the dangerous temperature, causing high temperature accidents and damaging the furnace body. Therefore, it should be controlled around 1.2--1.25.
When coke oven gas is heated, a is 1.2--1.3. When blast furnace gas is heated, a is 1.15--1.25. Generally, the gas can be completely burned. (This a value is the sampling value at the top of the vertical fire channel)
Each furnace type is different, the measurement time and measuring points are different, and the results are also different. Generally, a is 1.2--1.3 when heated by coke oven gas.
9# hjsmqgs The production reduction process can control the excess air coefficient to be about 0.05 smaller than normal.