METHOD OF RECOVERY OF BLACK SEA FROM HYDROSULPHURIC CONTAMINATION Russian patent published in 2019 - IPC E21C50/02 C02F1/00 

FIELD: ecology.

SUBSTANCE: invention relates to ecology and power engineering, in particular to extraction of hydrogen sulfide, sulfur, hydrogen, non-ferrous and rare metals from the deep waters of the Black Sea. Method is based on a natural process of decomposing hydrogen sulphide dissolved in water by atmospheric oxygen by mixing upper layers of sea water containing oxygen with cold hydrogen sulphide-containing water. On air, hydrogen sulphide water is gradually oxidized to free sulfur, which precipitates to the bottom in form of coagulated sulfur 2H₂S+O₂=2S+2H₂A. In order to implement the method, cold bottom water and suspension are repeatedly extracted along vertical multisection pipelines. Pipelines are installed at different depths of the sea. Buoys with information on composition of bottom water and suspension are installed on pipelines. Any vessel may be approached by a vessel for connection to it by means of a flexible hose of a horizontal pipeline with taps and valves arranged on the ship. Additionally, seawater is taken from the sea surface by the pumps; the boiler is used to heat the seawater. Heated water is directed through the taps with valves to the tanks where each container with the cover is placed inside the constant heating source. Controlled temperature is maintained for decomposition of hydrogen sulphide into coagulated sulfur, non-ferrous, rare metals and gaseous medium. Multiple alternate movement of portions of heated seawater and cold bottom water and suspension is performed in the vessel. Surplus of water in reservoirs after each portion filling is removed by pump. Extracted excess water is sent to settler, where after air bubbling, purified water is returned to sea. Hydrogen obtained in an electrolysis cell from a gaseous medium is used as fuel.

EFFECT: safe extraction of energy and mineral resources and provision of access to pipelines at different depths.

1 cl, 4 dwg