METHOD OF PREPARING NATURAL GAS Russian patent published in 2005 - IPC

FIELD: methods or apparatus for filling pressure vessels.

SUBSTANCE: method comprises investigating gas in a gas analyzer, supplying gas to the unit of the input cocks, removing droplet moisture and admixtures from the gas in a low-pressure gas filter, supplying the purified gas alternatively to one of the drying contours, purifying gas in the outlet gas filter, supplying gas to the inlet of the control unit, investigating gas in the gas analyzer, purifying gas in the filter-separator and in the filter which is composed of detachable filtering members, supplying purified gas to the flow meter, and supplying low-pressure purified gas to the inlet of the unit of the additional pressurization. A part of gas is reduced and supplied to the operator box at a pressure of 0.02 kg/cm². In the additional pressurizing unit, the gas is supplied to the space of the air-operated cylinder of the first stage through the inlet valve. The gas is compressed and discharged to the unit of the accumulation of low-pressure gas where it is cooled and supplied to the pressure line. The compressed gas with a pressure of 15-20 kg/cm² is then compressed and cooled in the air-operated cylinder of the second stage and intermediate-pressure accumulation unit up to a pressure of 60-80 kg/cm² and temperature lower than 40°C. A part of the gas is analyzed and supplied to a consumer at a pressure of 15-20 kg/cm². The compressed gas from the intermediate-pressure accumulation unit is compressed and cooled in the air-operated cylinder of the third stage. The compressed gas is additionally purified in the gas filters.

EFFECT: enhanced quality of gas.

4 cl, 5 dwg