Item Description

Instruments for the measurement of the incoming air flow and pressure drops across the convergence and divergence sections of the venturi are provided. The unit has been designed for student demonstration on dust pollution control using a venturi scrubber.
The venturi section is made of clear PVC with throat diameter of 32 mm and both convergence and divergence diameter of 101.6 mm. The separation chamber is also made of clear PVC measuring approximately 0.6 m diameter and 2 m tall. The chamber has a rectangular tangential inlet at the bottom that is connected to divergence section of the venturi. A mist eliminator at the top section of the chamber prevents any water droplets from escaping. The water re-circulation system consists of a water tank, a water pump, a liquid flow meter, a pressure gauge and a pressure regulator.
An air blower installed at the outlet is capable of drawing 280 m3/hr of air through the system. The air inlet velocity can be varied by means of adjusting the air blower speed. A dust feeding system is provided for introducing a desired amount of dust particles into the air stream before entering the separation chamber. A differential pressure instrument is provided for the purpose of measuring pressure drop, P, across the venturi.