FACILITY TO MINE CONCRETIONS FROM SEA FLOOR Russian patent published in 2003 - IPC

FIELD: excavation f concretions from seal floor and their transportation over pressure pipe-line to base vessel. SUBSTANCE: facility includes base vessel, mobile floor set with intake fixture, pressure pipe-line, perforated branch pipe showing holes which size is smaller than minimal size of mined concretions. Perforated branch pipe is put on section of pressure pipe- line bordering on floor set. Cross-section area of perforated branch pipe diminishes towards floor set. Length of perforated branch pipe and diameter of pressure pipe-line after perforated branch pipe in way of motion of hydraulic mixture are found from mathematical expressions. EFFECT: decreased energy consumption for transportation of concretions, reduced diameter, usage of metal and cost of pressure pipe-line, improved ecological situation in area of mining of concretions, decreased installed capacity of power plant. 2 cl, 5 dwg