SPRAYING METHOD AND SPRAY HEAD COMPRISING A LAVAL NOZZLE AND AN ANNULAR INDUCTION ELECTRODE

摘要

Method for carrying out agrotechnical spraying with chemical substances, characterized in that pneumatic atomization is performed using a convergent - divergent nozzle (3) to which gas is supplied under pressure within the range from 1 to 5 x 105 Pa, wherein in the divergent part of the nozzle (3) in the widest point it reaches speed a few times faster than the speed of sound, so that gas accelerated to ultrasonic speed disintegrates technological liquid flowing out from a capillary tube into drops of size from a few to a dozen micrometers, which are charged in an electrical field with a direct current voltage from a few hundred to 3 kilovolts, an annular electrode (7) is being supplied with voltage ue no more that 70 percent of voltage up, at which electrical discharge begins to occur in the space between the annual electrode (7) and the capillary tube (4) for technological liquid.