The device utilization of natural gas from the disconnected sections of the main gas pipeline
(57) Abstract:The invention relates to gas industry. The technical result of the invention is the provision of natural gas recovery from the disconnected sections of the pipeline located to the compressor station, and after it in the direction of gas flow at little cost to the preparatory work. In the proposed device uses low-pressure supercharger, staff supercharger station and staffing pipeline, and the low-pressure suction blower connected with the suction and pressure piping standard blower and pressure - suction pipeline of regular supercharger. 1 Il. The invention relates to a gas compressor units, transporting gas through pipelines.Known mobile compressor station (ISS) for pumping natural gas from the disconnected sections of the main pipeline, described in the journal "Gas industry" No. 5, 1998, page 16 and "Mobile unit for pumping gas from the disconnected section of the main pipeline (options)" on patent N 2108489."
Disadvantages technical solutions are the need for sufficient is aproved, the deployment of equipment and connecting it to the gas under pressure. For the deployment and operation of the ISS is also required crane, mobile power station, mobile dwelling unit.The closest technical solution is "gas Pumping unit of the main gas pipeline".with. 916783.The disadvantage of this technical solution is the inability to recycle gas from the disconnected areas located outside the compressor station (CS).The aim of the invention is a device utilizing gas from the disconnected sections of the pipeline located to the COP, and after the COP does not require delivery of equipment for utilization of gas to a location off site.This goal is achieved by the fact that the low-pressure supercharger, interacting with the standard compressor COP, is connected on the suction with suction and discharge staff of the compressor, and the pressure from the suction pipe standard blower.The features which are described in the known technical solutions are available compressors and pipelines.
forming and pressure piping standard blower KS, and at head - with the suction pipe of standard supercharger.The present invention is illustrated in the drawing, which shows a fragment of the pumping KS, containing two branches of the main pipeline, split locking bodies (hereinafter valves 1 and 2 in sections 3 and 4, located to the COP and the sections 5 and 6, located behind the COP on the direction of gas flow, staffing compressor 7 with suction pipes 8 and 9 and the valves 10, 11 and discharge pipes 12 and 13 with valves 14, 15. For pumping gas from the disconnected sections of the pipeline, the device is equipped with a low-pressure compressor 16 with suction piping gas utilization 17, 18 with the valves 19, 20, connected with the suction pipes 8 and 9 staff of the supercharger 7, suction piping gas utilization 21, 22 with the valves 23, 24 connected to the discharge pipes 12 and 13 staff of the compressor 7, the discharge pipeline gas utilization 25 with valve 26 and a crosspiece 27 with valve 28 connected to the suction piping of the regular blower 7.The gas utilization device provides two stage recycling and works as follows.The first stage gas utilization ASU staff blower (about 5 MPa). When disposing of gas from the site 3 or 4 on the standard pipe 8 or 9 through the valve 10 or 11 comes to the standard supercharger 7 and is blown by the standard pipeline 12 or 13 through valves 14 or 15 in the working section of the pipeline 5 or 6. When disposing of gas from phase 5 gas by pipeline utilization 21 with valve 23 and the jumper 27 with the valve 28 and the pipe 25 with the valve 26 is supplied to the standard blower 7 and the pipe 13 through the valve 15 is forced into the working section of the pipeline 6. When disposing of gas from section 6 gas in a similar way forced in work area 5.At the second stage gas utilization of sections 3 or 4 gas pipeline 17 or 18 through valves 19 or 20 is supplied to the low-pressure compressor 16 and the pre-compressed is fed to the standard blower 7 through the pipeline 12 or 13 through valves 14 or 15 pumps the gas in the working section of the pipeline 5 or 6.When disposing of gas from section 5 of the gas through the pipeline 21 to the valve 23 is supplied to the low-pressure compressor 16 and a pre-compressed is fed to the standard blower 7, which pipe 13 through the valve 15 is pumping gas into the working section of the pipeline 6. When disposing of gas from section 6 gas similar to the motor in series and provides a constant minimum pressure on the suction staff supercharger, equal to about 5 MPa. The residual pressure in the recycling section of the pipeline depends on the type of low-pressure compressor and may be equal to 0.1...1.0 MPa.As a low-pressure blower can be used or the gas-jet ejector or the compressor volumetric type.As a staff blowers on the COP used a centrifugal compressor with a compression ratio of about 1.5.A device for recycling gas is located on CA and provides recycling gas from 2, 3 sections of the pipeline before the constitutional court, and after the COP. The number of sections of the pipeline between the COP is 4-6. Therefore, the device for gas utilization provides its utilization of the entire pipeline.Device for gas utilization can be made stationary, mounted on each COP or as a mobile, serving several KS. In this case, the COP provides extensions to the standard pipelines for connecting the device for gas utilization.Due to the fact that the main gas pipeline is a complex set of interconnected pipelines with remotely-controlled equipment, as well as seasonal mode of operation, throughput ability what is the waste gas from gas pipelines, located to the COP, and after the COP on the direction of gas flow without delivery equipment for utilization of gas in the gas pipeline route, and in the absence of a necessary connection on the track under pressure. The device utilization of natural gas from the disconnected sections of the main pipeline containing low-pressure supercharger, staff supercharger compressor station and pipeline, characterized in that the low-pressure supercharger is connected to the suction with the suction and pressure piping standard blower and pressure - suction pipeline of regular supercharger.
FIELD: pipeline transport.
SUBSTANCE: power plant is additionally provided with a turbine expander provided with an electric generator. Power generated by the steam plant is directed to the main gas pipeline, and a part of power is directed to the turbine expander with electric generator to produce electric power.
EFFECT: enhanced reliability and efficiency.
1 cl, 1 dwg
FIELD: pipeline transport.
SUBSTANCE: method comprises intensifying extraction of low-pressure gas in tanks of oil stabilization due to rarefying gas in the inlet gas collector that connects the tank with the inlet of liquid-gas jet compressors by mixing the pumping product with active agent and increasing initial pressure of the low-pressure gas up to the pressure required by a consumer with simultaneous condensation of C5+ fraction. The gas-liquid mixture is supplied to the air cooling apparatus. After the separation of gas from the active agent, purifying and drying the compressed gas is intensified by supplying the compressed gas into the vortex pipe and, then, to the consumer.
EFFECT: improved method.
FIELD: oil and gas industry.
SUBSTANCE: device comprises device for enhancing and reducing pressure, receiving gas line for supplying the plant with the gas, discharging gas line through which the gas after purification is supplied from the plant, two vortex pipes, ejector, and condensate collector. The inlet of the first vortex pipe is connected with the receiving gas line and outlet of the cold gas flow of the second vortex pipe through the device for enhancing or reducing pressure. The output of the hot flow of the first vortex pipe is connected with the inlet of the first separator through the ejector, and the condensate outlet of the separator is connected with the inlet of the second vortex pipe. The outlet of the cold flow of the second vortex pipe is connected with the receiving gas.
EFFECT: enhanced quality of purification.
1 cl, 1 dwg
FIELD: preparation and transportation of petroleum associated and natural gases.
SUBSTANCE: invention relates to preparation of gas for transportation along gas pipeline and separation of heavy fraction condensate from gas. Proposed plant for preparation of petroleum associated gas or natural gas for transportation along gas pipeline and obtaining of liquid hydrocarbons from gas intake line, device to increase and decrease pressure, gas flow line, liquid hydrocarbons extraction line, three-circuit heat exchanger, separator, expansion valve, two regulating valves and swirl pipe whose input is connected through pressure increasing and decreasing device from one side with inlet gas line through first regulating valve and through series-connected second regulating valve and first circuit of heat exchanger, and from other side, with output of expansion valve. Output of cold flow of swirl pipe is connected through second circuit of heat exchangers with gas flow line, output of hot flow of swirl pipe is connected through third circuit of heat exchanger with input of separator whose condensate output is connected with line to remove liquid hydrocarbons, and gas output, with input of expansion valve.
EFFECT: increased degree of separation of condensate of heavy fractions of hydrocarbons from petroleum associated gas or natural gas designed for transportation along gas pipeline.
FIELD: the invention refers to energy-conservation technologies of pipeline transportation of natural gas.
SUBSTANCE: it may be used for controlling the technological process of the main pipeline with simultaneous selection out of gas of valuable ethane, propane, butane components. The technical result of the invention is reduction of energy inputs for maintaining pressure in the main pipeline, provision of stabilization of pressure in the main pipeline. The mode of transportation of natural gas along the main pipeline includes its feeding into the main pipeline on the first and the following compressor stations and giving out natural gas from the main pipeline through gas reducing stations and divide it on two flows one of them is directed into the pipeline of high pressure, and the other into a consumer pipe-bend. At that the gas of consumer pipe-bend is preliminary cooled and cleared from condensed and hard fraction, and then further cooling is executed till the temperature below the point of condensation of methane and division of cryogenic liquid and directed to the user, and out of received cryogenic liquid methane is separated from liquid ethane-propane-butane fraction which is returned into the pipeline of high pressure and further into the main pipeline, and detailed methane is directed into the pipe-bend. At that the gas in the pipeline of high pressure is preliminary additionally cooled, compremirated and returned into the main pipeline.
EFFECT: reduces power inputs.
7 cl, 1 dwg
FIELD: storage or transporting of natural gas.
SUBSTANCE: method comprises cooling natural gas down to a temperature below the temperature of the ambient air and transporting the cooled natural gas.
EFFECT: enhanced efficiency of storage and transporting.
16 cl, 13 dwg
FIELD: gas industry.
SUBSTANCE: method comprises separating the mixture into C1 methane fraction with subsequent supply to gas pipeline and C2+ hydrocarbon fraction that are preliminary stabilized by its liquefying by means of preliminary cooling down to a temperature at least 16°C and supplying to the gas pipeline. The pressure is maintained at a level no less than 3,2 MPa.
EFFECT: enhanced reliability of one-phase transporting.
FIELD: oil industry.
SUBSTANCE: supersonic tube comprises Laval nozzle, cyclonic separator with the blade, diffuser for discharging dried gas, and diffuser for discharging condensed liquid. The blade is made of deformed plate set in the screw groove made in the inner side of the cyclonic separator. The length of the plate is at least ½ of the pitch of the screw groove. The housing of the tube of the cyclonic separator receives locking members whose faces enters the screw groove. The distance between the adjacent locking members mounted in the screw groove is equal to the length of the plate.
EFFECT: enhanced efficiency.
FIELD: natural gas industry; other industries; production of the gas pipeline blowoff valves.
SUBSTANCE: the invention is pertaining to natural gas industry and is intended for blowing through of the gas pipelines. The technical result of the invention is the increased efficiency of usage of the gas pipeline blowoff valves at augmentation of the quantity of the delivered for utilization of the waste heavy hydrocarbon fractions of the natural gas for their additional condensation in the area of formation of the microswirlings between the exterior funnel-shaped and interior perforated conical walls. In the gas pipeline blowoff valve in the holes of the perforated conical wall there are the curvilinear grooves, which curvature is directed counterclockwise, and the curvature of the guiding vanes is made in the clockwise direction.
EFFECT: the invention ensures the increased efficiency of usage of the gas pipeline blowoff valves.
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.