I am a rice noodle processor. The following is my experience:

Using diesel and gas is the most inconvenient and unstable, and the cost is extremely high.

The electricity consumption is very stable, and it is good for promotion, but the cost is also very high.

Coal and wood burning generally require a dedicated pressure boiler.

A machine with an output of 350kg per hour is generally equipped with a 0.04pa boiler.

Firewood is the cheapest. I have also seen people burning rice straw, and the cost is probably lower...

It is recommended to burn anthracite, which is cheaper and has no smoke. The cost per kilogram of powder can also be controlled at 3 cents to 5 cents. Split the money.

I think of these for now, I hope it can be helpful to you.