Can the flow rate of pulverized coal remain stable regardless of the load, as long as the pressure difference between the pulverized coal feed container and the burner is stable?
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Can the flow rate of pulverized coal remain stable regardless of the load, as long as the pressure difference between the pulverized coal feed container and the burner is stable?
The pulverized coal feed bin uses high-pressure nitrogen for pressure compensation, while the gasification furnace has 16 units for controlling pressure; therefore, the stability of these two pressures is merely a necessary condition to ensure a steady supply of pulverized coal. There are many other factors that affect the stability of coal powder delivery, such as the properties of the pulverized coal, flow-rate and valve control, wear and tear on the valves, and whether the coal contains impurities.
If there are no large foreign objects in the coal powder blocking the passages and the nitrogen, which serves as the auxiliary conveying medium, is in a stable state, it is possible to maintain a steady flow rate; however, if the control system changes the valve opening, things become more complicated.
If the pressure difference at both ends is unstable, there must be some problem with the coal powder transportation. But conversely, it is not entirely true.
There are many factors that affect the stability of coal powder flow, and pressure difference is only one of the more important aspects
The pressure difference is a controllable parameter, but there are also many uncontrollable factors involved: the particle size distribution of the coal powder, whether the coal powder control valve operates linearly, whether the coal powder contains impurities, whether the amount of nitrogen used for assistance is stable, whether the measuring instruments are functioning properly, and whether the system pressure is stable, among others