1. Spray towers have been used to remove these highly soluble compounds.2. Operating characteristics of spray towers are presented in the following table. 3. Like a spray tower an ejector venturi scrubber uses a preformed spray. 4. A spray tower is typically used for this application. 5. Spray towers have been used effectively to remove large particles and highly soluble gases.6. Low energy devices such as spray towers are used to collect particles larger than 5 micrometers. 7. Therefore, spray towers use nozzles that produce droplets that are usually 500 1000 �m in diameter. 8. For example, spray towers are used to remove HCl gas from the tail-gas exhaust in manufacturing hydrochloric acid. 9. These devices are used much the same as spray towers -to preclean or remove particles larger than 10 ?m in diameter. 10. In order to maintain low gas velocities, spray towers must be larger than other scrubbers that handle similar gas stream flow rates. 
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