the edge 24 the charge which is left on the droplet is proportional to the surface area of the droplet at birth therefore as long as the charge does not exceed the rayleigh limit the larger sized droplets will carry a larger charge q 0 at birth the above considerations favor using droplets of larger initial size for the sake of having high droplet charging to achieve maximum efficacy of particulate collection through the monopole dipole interactions the use of droplets of larger initial size and hence high charge makes the present invention device especially effective when the gas to be cleaned has high temperature and low relative humidity typically such gases are first passed through a 34 quench 34 chamber in which a spray of water is used to humidify and cool the gases before passing them through the air pollution control device when hot gases are passed through the present invention device the device not only quenches but the particulate collection efficiency of the device is enhanced by the partial evaporation from the droplets in the process of quenching thus the device is even more effective when used as a single device to both quench and also remove particulates and toxic gases on the other hand the invention also seeks to have the droplets adsorb pollutant gases i e toxic and acid gases this process would appear to be facilitated by maximizing the droplet surface area per unit volume of gas to be cleaned since the volume per liquid droplet varies as the cube of the droplet radius and the surface area per liquid droplet varies as the square of that radius the effective collecting surface area per unit volume of injected liquid varies inversely as the droplet radius a consideration favoring use of smaller droplets.