DEVICE FOR GAS EVACUATION FROM A DISCONNECTED SECTION OF MULTILINE MAIN GAS PIPELINE Russian patent published in 2016 - IPC F04F5/22 F17D1/07 

FIELD: gas industry.

SUBSTANCE: device is intended for gas evacuation from a disconnected section of multiline main gas pipeline. Device comprises a two-stage ejector made in the bypass unit of the main gas line or connected to this bypass unit by means of flanges on the pipeline of discharging gas from a disconnected section and pipeline of gas injection into a section, which follows a pumping section, each stage of the two-stage ejector is equipped with a stop cock on active gas supply, and the section between a stop cock of active gas supply into the first stage of the ejector and its nozzle communicated with the gas supply pipeline through an additional stop cock from a disconnected section to a low-pressure chamber of the first stage of the ejector, output of which through the nozzle of passive gas and mixing chamber of the first stage is an input into circular active gas nozzle of the second stage of the ejector, output of second stage of the ejector is connected to the flange pipeline of discharging gas into the section, which follows a pumping section.

EFFECT: technical result is increased efficiency of the ejector.

1 cl, 1 dwg