FIELD: agriculture; spraying of farm crops. SUBSTANCE: liquid for spraying device is supplied with viscosity within 0,87•10-3≅ μ ≅ 1,5 Pa•s and content C of undissolved particles relative to liquid amount C2 passed through spraying device per time unit within 1 ≅ (C1+ C2)/C2 ≅ 1,9 and maximum sizes d of undissolved particles within 0 ≅ d ≅ 5 mm at pressure P1 of liquid supply within 0,02 ≅ P1≅ 150 atm. Ratio between liquid pressure and gas flow pressure is maintained within 1,2 ≅ P1/P2≅ 1,5•103. Splitting of liquid is effected by liquid passing through hole with subsequent multistage splitting, including mechanical splitting at the first stage by jet impact against fixed obstacle to form particles with volume V1 selected with respect to volume V2 of supplied for splitting per time unit of liquid within 10-9≅ V1/V2≅ 1. At the second stage, interaction is effected between produced particles of liquid with n jets of gas flow whose number is selected within 1 ≅ n ≅ 109. In this case, inertial separation of fine particles is effected, and coarse are split by intersection jets of gas flow to form particles with volume V3 whose relation to volume V1 is selected within the limits of 10-9≅ V3/V1≅ 1. At the last stage of splitting, separation of the largest particles with volume V4 is carried out with subsequent splitting to volumes V5 whose relation to volume V4 is maintained within 10-6≅ V5/V4≅ 1. When liquid particles are split by gas flow, they are saturated with gas volume V6 which are selected with respect to volume V3 by maintaining the total gas flow rate qg relative to liquid flow rate ql within 10-3≅ qg/ql≅ 103. Device output part of branch pipe 3 supplying liquid is located in liquid chamber 2 and has holes 4 in is side wall. Branch pipe supplying gas flow is made in form of changeable air intake 5 in hollow of body 1. Air intake 5 has end wall 6 facing liquid chamber 3. Air intake 5 has holes 7 and 8 for supply of gas flow in end and side walls ob body hollow. Discharge means for liquid supply to hollow of body 1 is made in form of slotted holes 10 in wall 11 of liquid chamber facing end wall 6 of air intake to form chamber 12 of preliminary splitting in body hollow. Ratio between area S1 of slotted hole 10 and area S2 of end wall of air intake 5 is selected within 0,011 ≅ S1/S2≅ 1,2•103. Ratio of value S of width of slotted gap and distance l between wall 11 of liquid chamber and end wall of air intake is selected within 1,3•10-2≅ S/l≅ 1,4•103. Formed between external surface of side wall of branch pipe 5 and internal body surface is chamber 13 of main splitting of elongated shape. Holes on side wall of air intake are made with varying and decreasing in spacing in direction of flow motion and minimal size of cross-section and at angle α between perpendicular to output planes of holes and tangents to generating line of air intake wall selected within 10° ≅ α ≅ 170°. Ratio between area S3 of inlet hole of main splitting chamber and area S4 of its outlet hole is taken within 2,1•10-2≅ S3/S4≅ 3,2•102. Ratio between volume V7 of main splitting chamber 13 and volume V8/ of chamber 12 of preliminary splitting is selected within 5,2•10-2≅ V7/V8≅ 4,6•102. Air intake 5 in zone of outlet nozzle 16 has bent off wall 17 with sharp edge 18 forming together with output end of body a zone of separation and final splitting in form of curved channel 20. Angle β of taper of sharp edge is taken within 10° ≅ α ≅ 170°. Ratio between area S5 of bent side wall 17 and area S4 of outlet hole of main splitting chamber is taken within 0,48•10-2≅ S5/S4≅ 6,1•102. Ratio between area S6 of outlet hole of zone of final splitting and variable area of inlet hole 21 of air intake is taken within 0,1 ≅ S6/S7≅ 3,1 and relation between summary area S8 of holes of end wall of air intake and area S9 of holes of side wall of air intake and area S7 of inlet hole of air intake is elected within 10-3≅ (S8+ S9)/S7≅ 10. EFFECT: higher efficiency. 2 cl, 2 dwg
