Device for condensate plug creation prevention in gas pipeline

FIELD: gas conveyance means, particularly gas-main lines, gathering lines and manifolds of gas fields for condensate recovery.

SUBSTANCE: device to prevent condensate plug forming in pipeline comprises pipeline with inclined sections and connection elbows with enclosing channel. Discharge condensate pipe is formed in lower part of connection elbow. Condensate pipe is located in funnel-shaped enclosing channel and is connected to accumulation vessel located below ground freezing level. Condensate removal pipeline is installed in accumulation vessel so that the condensate removal pipeline is coaxially retained in vertical enclosing channel.

EFFECT: possibility to maintain thermal gas pipeline regime, which prevents condensate freezing, to remove accumulated condensate due to usage of steam condensation heat generated during condensation of steam present in conveying gas flow.

1 dwg

 

The invention relates to pipeline transport of gas and can be used in gas pipelines, flowlines and manifolds gas fields for the disposal of condensate.

A device for preventing the formation of condensate tubes in the pipeline (see A.S. USSR №1467305, MCL F17D 1/02, 1989, bull. No. 11)that comprises a pipeline with ramps and connecting knees.

The disadvantage of this invention is the accumulation of condensate in gas transportation even in riskreduction on the diameter of the pipeline, which ultimately leads to the inevitable formation of condensate tubes, and at subzero temperatures of the gas environment is observed the formation of zones of freezing, related emergencies.

The technical task of the invention is the temperature of the gas pipeline, preventing freezing of the condensate, and timely destruction of its accumulation, which is made by using heat of condensation of the vaporous moisture, placed in a moving stream of gas transported.

The technical result to eliminate the possibility of freezing of the condensate is achieved in that the device for preventing the formation of condensate tubes in the pipeline, including the abuser actually a pipeline with ramps and connecting the knee covering the channel, additionally, in the lower part of the connecting knee done drain the condensate line, located in the funnel-shaped covering the channel and connected with the storage tank, the storage tank is placed piping condensate drain coaxially fixed in vertical spanning the channel.

The drawing shows the relief section of the pipeline.

The device consists of a sloping rising 1 and downstream 2 gas pipelines and knee 3, which is placed in covering the channel 4. In the lower part of the connecting knee 3 done drain the condensate line 5, located in the funnel-shaped covering the channel 6 and is connected with a storage capacity of 7, the storage capacitor 7 is placed piping condensate drain 8, coaxially fixed in the vertical covering channel 9 and having a valve 10 for condensate collection.

Device for preventing the formation of condensate tubes in the pipeline works as follows.

The most dangerous areas in terms of education condensate tubes and freezing of the condensate is its upstream section and the knee. To prevent the formation of condensate tubes in the pipeline requires continuous removal of condensate and to eliminate freezing it is the corresponding temperature is about mode. The condensate from 1 in ascending and descending 2 sites due to the cooling of the walls of the pipeline in the frozen ground, flows under gravity through the connecting knee 3 through drain the condensate line 5 the holding tank 7, which is located below the level of soil freezing. As a result, the condensate is heated (connective knee 3 is in the area of soil freezing and easy boiling fraction of hydrocarbons, which is part of the transported gas, steam and through the funnel covering the channel 6 enters covering the channel 4 of the pipeline. This pair condensate moving through a covered channel 4, in contact with the outer surface of the connecting elbows 3 and upstream and downstream sections 1 and 2, gradually condense (area of soil freezing), while highlighting the heat of phase transition (see, for example, Nashchyokin CENTURIES of Technical thermodynamics and heat transfer, - M., 1980 - 469 C., Il.). In the process of heat transfer from condensing vapors to transportirovaka supported its temperature in the connecting elbow 3, and drain the condensate line 5, preventing the formation crystallohydrate and ice jams.

The resulting condensate drains back through a funnel spanning a channel 6 in the accumulation capacitance is th 7, then the cycle repeats. When this heating piping condensate drain 8 is similar to the process of condensation of vapors of the liquid in the vertical covering channel 9. With a significant accumulation of condensate in the cavity 7 is its removal through the opening of the valve 10 through the piping condensate drain 8. The process of removing condensate from the tank is carried out both manually and automatically, not shown.

The originality of the proposed technical solution is that the prevention of freezing of the condensate is achieved without any additional power consumption to maintain the appropriate temperature in freezing temperatures, such as frozen ground, and through the use of the heat of phase transition, required for transportation of gas.

Device for preventing the formation of condensate tubes in the pipeline, including the actual pipeline with ramps and connecting the knee covering the channel, characterized in that it further in the lower part of the connecting knee done drain the condensate line, located in the funnel-shaped covering the channel and connected with a storage capacity below the level of soil freezing, with cumulative capacity o f the pipeline condensate, coaxially fixed in vertical spanning the channel.



 

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