【Weekly Topic】: The role of the screw conveyor in the coal powder preparation unit for pulverized coal gasification; can other equipment replace it?
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What is the role of the screw conveyor in the coal powder preparation unit for pulverized coal gasification, and can other equipment replace it?
What is the role of the screw conveyor in the coal powder preparation unit for pulverized coal gasification, and can other equipment replace it? The screw conveyor in the coal powder preparation unit for pulverized coal gasification is difficult to replace.
The reply should explain whether it can be used as a substitute or not, and what the alternative methods are
It is difficult to replace it during transport at normal pressure.
It can be replaced with a belt-type system, but the pulverized coal feeding device needs to be properly designed. Pulverized coal is different from lump coal; it has high fluidity and is difficult to control, which is the main issue.
What a joke – how can coal dust be transported by belt?
Then tell me why a belt conveyor can’t be used? Many powders are already transported using belt conveyors; is there anything special about coal dust?
Purely personal opinion: 1. The particle size of coal powder during gasification is generally in the range of 5–80 μm, and the transportation method is pneumatic transmission within a sealed space. 2. Using belts: a. Prone to deviation, not durable, require replacement after breaking, and are difficult to maintain. b. The bearing system is prone to dust accumulation; you know the consequences. c. Small equipment faults are difficult to detect.
When coal powder is exposed to the atmospheric environment for a long time, it tends to absorb moisture and become damp, as well as to catch fire on its own.
Moreover, some require a very high temperature of the pulverized coal.