Arrangement method of air guns in coal bins

The coal weighing feeder is located on the belt, while the air cannon is situated at the bottom of the coal bin; it has little to do with weighing, and merely causes uneven discharge, leading to fluctuations. . . . . . . . . . . . .

If material is continuously discharged from the discharge port, using an \"air cannon\" intermittently to clean the coal adhering to the walls of the coal bin will not affect the coal weighing feeder. However, using the \"air cannon\" to generate air pressure against the belt of the weighing feeder when there is no coal at the discharge port will affect the measurement accuracy. In my opinion, this problem can also be solved easily. First, use a weighing feeder with high measurement accuracy. Second, when designing such a feeder, the belt length should be set to be longer, which will significantly improve the measurement accuracy. Good measurement accuracy helps to produce high-quality water-coal slurry and ensures stable operation of the gasification process – it’s definitely an advantage. One shouldn’t sacrifice something important for a minor gain. Additionally, air guns should not be used in coal silos; nitrogen guns should be employed instead

I would like to ask: how effective are the nitrogen cannons that people are using currently? Could the upper part of these nitrogen cannons become a site where coal accumulates?

It won’t get worse; it will only improve. The design for areas prone to blockages is sound; an air cannon relies on high-speed gas jets, moving at supersonic speeds, to impact the solid particles that cause blockages. The pressure of the air is converted into kinetic energy of the jet, generating a powerful force that effectively restores movement to the material inside the silo. However, air cannons cannot completely avoid or alleviate the problem of clogging. Reduce the workload.

The placement of nitrogen guns in the coal bin should involve installing them evenly from the bottom of the bin upward, trying to avoid any dead zones. This way, nitrogen guns can be used sequentially when blockages occur. Nitrogen guns do not cause blockages; as long as operators make decisions based on the actual level of coal in the bin as indicated by the level gauge, as well as the amount of coal fed into the coal grinder, they can use the nitrogen guns effectively. If these guns are used frequently in the upper part of the bin where there is already coal, it will compact the coal, exacerbating blockages and other issues. Operators need to determine, through practical experience, at what times and in which areas to use the nitrogen guns. If they lack experience, it is recommended to start using the nitrogen guns from the bottom up, and to stop using them immediately once there is coal in the weighing feeder.