i want a design for small boiler 3t/hr,125psi,250c.Fuel is wood,rice husk,oil.Can any body help me?
3 t/hr? What are you talking about? Most boilers are rated in mm BTU/hr. If you're looking to get a boiler like that though you may want to look in to the outdoor woodburning hot water boilers that you can use to heat homes. You can't burn oil in them but you'd be alright with wood and rice husks.
