The method of transportation of gas via trunk gas pipeline

 

(57) Abstract:

The method of transportation of gas via trunk gas pipeline refers to energy-saving technologies of transport gas and can be used for creation of the automated control system of technological process of the main pipeline. The flow of compressed gas at the outlet of compressor stations is cooled by means of heat pumps and automatic control of heat pumps by means of the control device as a function of difference between the current temperature values of the pipe of the pipeline and the soil at a depth of laying its respective area allows you to minimize thermal deformation of the pipeline and thus increase its operational reliability. All selected heat pumps heat is transferred to heat energy which is consumed for heating needs compressor stations and nearby to it infrastructure. 1 Il.

The invention relates to energy-saving technologies of transport gas and can be used for creation of the automated control system of technological process of the main pipeline.

Known SPO is the output of the compressor station is cooled by means of air cooling units (ACU) [1].

The drawback of this method is that the air cooling unit used to cool the flow of compressed gas, do not allow year-round cooling pipe of the pipeline until the soil temperature at the depth of its installation and, consequently, does not exclude the occurrence in it of temperature deformations. In addition, all of the heat extracted from the gas flow is dissipated into the environment.

There is also known a method of transport of the gaseous products to a temperature below the ambient temperature, which is implemented using a system containing heat pumps on each compressor stations of main gas pipeline [2]. However, the cooling of the gaseous products of this system to a temperature below ambient may lead to niedokladnie or subcooling of the pipeline relative to the ground at the depth of its styling and cause thermal deformation of the pipes of the pipeline.

The technical result of the invention is to improve the operational reliability of the main pipeline and energy saving.

This is achieved by the flow of compressed gas at the outlet of all compressor stations at the beginning of each linear section of the pipeline is cooled using teplogazholodvod equal to the soil temperature at the depth of its installation.

Comparative analysis of the proposed solutions with the prototype shows that the proposed method of transportation of gas via trunk gas pipeline differs from the known fact that the process gas cooling year-round automatically adjust throttling the flow of refrigerant in the heat pump by means of the control device based on the difference between the current values of the temperature of the pipe and the soil at the depth of laying the corresponding section of the pipeline and thereby minimize thermal deformation of the pipeline and increase its operational reliability, and the heat is taken from the gas stream using heat pumps, thermodynamic characteristics are better than those of refrigerating machines, fully utilized.

In Fig. presents a structural diagram illustrating the proposed method of transportation of gas via trunk gas pipeline at one of its sites.

The diagram shows compressor station CS and the linear part G of the main gas pipeline, between which a heat pump TONS and sinks of thermal energy PTE. Heat pump VT contains the evaporator 1, the tubular space which is compressed is connected to the annular space of the evaporator 1, and the output from the annular space of the condenser 3, hadproved 4, the valve 5 is driven actuator 6.

Tube space of the condenser 3 of the heat pump, which circulates the heat sink taking heat from the refrigerant, connected by a heat pipe 7 with consumers of thermal energy PTE.

After the heat pump TONS at the beginning of the linear part of the pipeline is installed temperature sensor pipe D and in soil at a depth of laying of pipeline outside of the zone of thermal field installed temperature sensor T, the outputs of which are connected with the control unit CU. The output unit SU is connected to the actuator 6, the impact of which is aimed at regulating valve 5.

Compressed at the compressor station CS gas of high temperature is supplied into the tube space of the evaporator 1 heat pump TONS and then to the linear part G of the main pipeline. In the annular space of the evaporator 1 is the refrigerant, which under the action of the gas temperature (caloosahatchie) boils, and its fumes are sucked by the compressor 2, so that the evaporator 1 is constantly maintained low pressure and thus the e space of the condenser 3, where are cooled by heat circulating through its tubular space and the heat pipe 7, resulting condensed. From the condenser 3, the liquid refrigerant, having a regulating valve 5 is supplied to the evaporator 1, then the duty cycle will be repeated.

Sensor DT measured temperature pipe Gazoprovod and sensor DT - soil temperature, the signal of the latter is the setpoint for the control unit CU. When the temperature of the pipe of the pipeline differs from the soil temperature (setpoint), i.e. there is a mismatch, the unit CU generates a control signal for controlling the flow of refrigerant through the evaporator 1 heat pump TONS (by throttling valve 5 refrigerant flow), thereby modifying the performance of the heat pump.

Using the proposed method for the transportation of gas via trunk gas pipeline provides compared to existing methods year-round automatic alignment of the pipe temperature of the gas pipeline with soil temperature at the depth of the pipeline, and thus virtually eliminates temperature deformation of the pipeline and the destruction of its anti-corrosion insulation, in re the heat in full is utilized for heating purposes compressor stations and nearby to it infrastructure.

The method of transportation of gas via trunk gas pipeline, which consists in cooling the stream of compressed gas along the entire route of the pipeline through the heat pumps installed at all compressor stations at the beginning of each linear section of the pipeline, characterized in that the process gas cooling year-round automatically adjust throttling the flow of refrigerant in the heat pump by means of the control device based on the difference between the current values of the temperature of the pipe and the soil at the depth of laying the corresponding section of the pipeline and thereby minimize thermal deformation of the pipeline and increase its operational reliability.

 

Same patents:

The invention relates to the field of construction and for the restoration of degraded underground metal pipelines

The invention relates to pipeline transport, mainly aggressive gases, and can be used in gas and chemical industry

The invention relates to the preparation of oil gases of the first stage separation of oil to transport them to processing plants and other consumers and can be used in the oil industry

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.

1 dwg

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.

1 dwg

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.

2 dwg

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.

4 dwg

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.

4 dwg

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

Up!