Hydrogen-mixed natural gas pipeline valve chamber safe emptying system and method
A technology for a hydrogen-mixed natural gas and venting system is applied in the field of safe venting system of a valve chamber of a hydrogen-mixed natural gas pipeline, which can solve the problem of frictional spontaneous combustion, and it is also possible that the medium may be ignited by the outside near the nozzle when the medium leaves the venting riser, which is easy to induce deflagration or explosion. and other problems, to achieve the effect of ensuring the release rate, preventing the release and spreading, and avoiding safety problems.
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[0024] A safe venting system for the valve room of a hydrogen-mixed natural gas pipeline, which mainly includes: main line pipeline 1, cut off ball valve 2, main line bypass 3, pressure transmitter 4 / 5 / 6, bypass cut valve 7 / 8, bypass external pipeline 9. High-pressure branch pipe 10, vent cut-off valve 11 / 13, restrictor orifice 12 / 14, vent manifold 15, vent main pipe 16, vent torch 17, replacement gas injection branch pipe 31 / 32, replacement exhaust branch pipe 33 / 34 / 35. Flare cushion gas injection branch pipe 36, shut-off valve 18 / 19 / 20 / 22 / 24 / 26, check valve 21 / 23 / 25, flow transmitter 27, flame arrestor 28.
[0025] Among them, trunk line pipeline 1, cut off ball valve 2, trunk line bypass 3, bypass cut valve 7 / 8, pressure transmitter 4 / 5 / 6 and other trunk line cut-off systems are responsible for instructions when the upstream or downstream of the pipeline fails or needs maintenance The shut-off ball valve is closed to isolate the upstream and d
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