Water cooled vibration grate boiler is one kind of grate boiler and named by it special grate. The firing straw falling on the grate will be rolled on the grate according to vibration frequency and
period to prevent coke which is made outside from forming solid and stick on the grate. The cooling effect of the grate is better than the pure air cooling. The combustion is more efficient. It is
widely used in the biomass and garbage power plant.