DEVICE FOR CRYOGENIC GRANULATION OF LIQUID SULPHUR Russian patent published in 2018 - IPC C01B17/02 B01J2/06 F25D3/10 

FIELD: oil and gas industry.

SUBSTANCE: device for cryogenic granulation of liquid sulphur includes a granulator 1, a loading pipeline 15, a process unit 4 for feeding liquid sulfur and discharging granulated sulfur, a liquid nitrogen supply pipe 16. The granulator 1 is made as a thermally insulated chamber with inner surface of cylindrical shape, in which the process unit 4 vertically coaxially installed for simultaneous involvement in the process of liquid sulfur granulation and withdrawal of granulated sulphur. The process unit 4 is equipped with a distributing element 7 for liquid sulphur supply into liquid nitrogen through holes for producing sulphur granules of given diameter, and a screw surface in the form of an auger 8 for discharging granulated sulfur, and a mechanical transmission 9 providing rotation of the process unit 4 about its axis from a drive 10 with variable speed. Liquid nitrogen is supplied to the granulator 1 at its lower central point. The distributing element 7 is located below the liquid nitrogen level in the granulator 1 and installed in lower part of the inner cavity of the process unit pipeline 4. The distributing element 7 is in the form of two perforated metal plates 12 - the upper and lower ones, between which a heating element 13 is located. The loading pipeline 15 is configured for suppling liquid sulphur into the inner cavity of the process unit 4 at the zone of the distributing element 7 in amount sufficient to maintain the level of liquid sulphur in the process unit equal to at least 0.45 to the level of liquid nitrogen in the granulator 1 from the upper plate of the distributing element 7. The area for release of sulphur granules from the granulator 1 is equipped with a flanging 3 which ensures the direction of sulphur granules movement into unloading hopper 17.

EFFECT: invention improves the quality of granular sulphur and efficiency of the process due to minimum possible consumption of liquid nitrogen.

4 cl, 1 dwg, 1 tbl