Urea hopper extension

In a mass flow hopper, all the material inside the hopper moves down the walls and exits. The flow is based upon a first-in, first-out principle and is uniform and reliable upon discharge. Moisture content, temperature, age, oil content, and solid levels must be regulated to ensure effective flow.

There are two types of hoppers, conical and wedge-shaped. The hopper shown below to the right is conical whereas a wedge-shaped hopper is a trough with a narrow slit, as shown to the left. Conical hoppers must be steeper to promote the same amount of flow but wedge-shaped hoppers require a conveyer to collect the materials that exit from it.