Slurry tank mixer
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The agitator in the coal slurry tank is broken; how should it be handled during the replacement period? The coal slurry tank has a conical bottom and is used with a single-nozzle gasification furnace. I would appreciate it if the experts here could give me some advice
It is feasible to operate at a lower level in the coal slurry tank, and to start the backup coal slurry pump in stages for circulation
There should be two slurry tanks; it is recommended to extend the pipeline from each slurry tank to the inlet of the high-pressure slurry pumps, so that each slurry tank can operate with two high-pressure slurry pumps respectively. When the slurry tank mixer breaks down, it is easy to carry out maintenance. At the current stage, if it is based on the original design, the mixer in the slurry tank can only be replaced during maintenance when replacing the burner; if the liquid level is controlled too low, it is easy to cause a decrease in the pressure at the inlet of the slurry pump ； Without the mixer running, the circulation effect of the slurry pump is not very good ； Operating without a stirrer for extended periods can lead to issues such as large fluctuations in the coal slurry volume, which makes it easy for the gasifier to trip due to interlocks. . .
Nitrogen was introduced through openings around to see if it could act as a stirrer
Operating at a low liquid level is sufficient! There’s nothing else to consider; I have handled this situation many times before. The low liquid level is primarily intended to ensure the stability of the coal slurry, reduce its residence time in the tank, and prevent stratification as well as the formation of solid deposits!
Appropriately lower the level in the slurry tank, and use a backup pump to increase slurry circulation.
Does the conical bottom have a fluidization nozzle? If so, nitrogen can be introduced. It also depends on the piping for the slurry tank and the transfer pump during design
I’m not sure what the diameter of your slurry tank is; does it have a conical bottom? What is the angle of that conical bottom?
After the mixer stops operating and operation continues at a reduced liquid level, how long can it run?