NATURAL GAS ODORISER Russian patent published in 2010 - IPC G05D7/00 

FIELD: oil and gas industry.

SUBSTANCE: natural gas odoriser includes temperature-controlled service tank of odorising liquid with pressurisation branch pipe and odorant supply branch pipe, channel of pressurisation with high pressure gas, which is interconnected through service reduction gear and ejector with low pressure line, and through service reduction gear and pressurisation reduction gear with pressurisation branch pipe and through mixing valve with odorant supply branch pipe located in gas cavity of the tank and interconnected with low pressure line by means of switches through ejector or through odorant flow control. Odorant flow control includes central body installed in the body with possibility of axial movement by means of stock connected to drive mechanism controlled with pneumatic signal from pressure drop sensor of flow metre - contraction device in low pressure line. At that, passage area of the channel formed with central body and housing changes proportionally to gas flow in low pressure line.

EFFECT: minimising the number of movable odoriser elements, simplifying its construction, improving its operating reliability during odorisation of low gas flows and providing the supply of odorant vapours to the main line in direct ratio to gas flow in the main line.

6 cl, 3 dwg