METHOD FOR CLEANING OF STRUCTURES FROM ICE COATINGS Russian patent published in 2008 - IPC F42D7/00 E04D13/76 

FIELD: provision of safe service of engineering structures in the conditions of their icing.

SUBSTANCE: the method consists in action of an explosion of a cloud of fuel-air mixture on the structure that covers the ice coated structure or a part of it. Ignition explosive charge with mass d=αT_ex/m, kg in the trinitrotoluene equivalent are placed in the area of spraying with density σ_s.c.h³>m≥σ_ih³, piece/m, where σ_i -the strength of ice adhesion, MPa; σ_s.c. - the maximum permissible pressure on the structure components, MPa; h-the mean thickness of ice coating, m; T-the fuel ignition temperature, К; α - the rated coefficient of ignition of the fuel-air mixture by the air shock waves, and connected to the circuit of simultaneous blasting. After that the mass of liquid fuel M=0,23sρN/n, kg in a mix with a dye is sprayed, where S-the stoichiometric concentration of fuel; ρ- the air density in the area of operations, kg/cu.m; N-the quantity of the placed ignition charge, pc; and at a visual observation the electroblasting circuits is closed at the instant, when the cloud of the fuel-air mixture overlaps the ignition charge. Fuel is sprayed from sprayers distributed near the structure and connected to one air compressor. Thermit is used as a dye.

EFFECT: enhanced efficiency and reduced labor content at cleaning of structures from ice coatings.

3 cl