Temperature control issue of pulverized coal in pulverized coal gasifiers
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The control system for the pulverized coal gasifier maintains the temperature of the pulverized coal fed into it at 80°C. Why is this temperature necessary? Is it possible to use a higher temperature, such as 100°C or 120°C?℃
If there is a heat source, it can be a bit higher
It should be above 80°C; for aerospace applications, it is 105°C, as at temperatures below 80°C, there is a high likelihood of water being released from the coal, which can lead to blockages.
The coal powder temperature is primarily determined based on the optimal flow temperature of the coal powder, in order to maintain good flow properties. Factors such as particle size, moisture content, and type of coal can all have an impact
At 105 degrees Celsius, it is possible to ensure the separation of water, which reduces the risk of bridge formation; however, too high a temperature is also not ideal. The Shenmu coal used in dry coal powder has a relatively high volatile matter content, and high temperatures can lead to effects similar to those of low-temperature carbonization, thereby reducing the fluidity of the coal powder
The space furnace is heated by 5 kilograms of steam; after reaching the burner, it is further heated by the burner’s cooling water, with a temperature of around 150 degrees
Generally, pulverized coal has good activity and a low ignition point, which prevents spontaneous combustion.