Supersonic tube for preparing gas 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.
The invention relates to devices used in the oil and gas industry, and can be used for the preparation of associated petroleum gas to distant transport due to dehydration and low temperature separation of heavy hydrocarbons.
Known devices for low-temperature condensation, in which the raw gas compression, cooling, separation of the gas phase and condensation in heat exchangers and condensers by separation using an external refrigeration cycle with subsequent detenizatsiii in a distillation column, for example installation in A.S. No. 732637, USSR, F25J 3/06, application No. 4607307/23-26 from 29.11.88, F25J 3/00, which differ in the necessity of using a large range of equipment, including compressor, large capital and energy costs.
There are devices that use machineless ways of getting cold: device with water pipes, for example, in A.S. No. 1726927, F25 9/02, A.S. 1732752, F25 9/02, as well as devices with supersonic tubes, for example, by A.S. 2106581, F25 9/02.
A known design of the device for separation of gas, water and heavy hydrocarbons using supersonic tubes, consisting of an extender with a Laval nozzle, cyclone separator supersonic blade diffuser to dry gas outlet and diffuser for exhaust RMSE is desireables liquid - (Fatimata, Dambrova // "Oil and gas technologies" №6, p.41) prototype.
In the famous supersonic tube compressed gas in the critical cross-section of the Laval nozzle acquires a velocity corresponding to a Mach number equal to 1, then the gas is expanded to M=1,3...1,5, gas pressure is reduced to ˜0.3 of the original value, and the temperature is reduced to ˜60°from the original values, while water and heavy hydrocarbons (C5and above) are condensed.
The blade is placed in a supersonic stream, discards from the flow axis formed drip the liquid on the tube wall, and then separated flows down each diffuser, while the dried gas through the Central cone is diverted into a pipeline with a pressure of up to 0.8 times the initial value, and the liquid stream with the partially entrained by the gas along the circular cone is diverted into the tank for condensate collection.
Known supersonic tube is a device with a fixed gas flow, which creates a pressure drop. The efficiency of the device (the degree of condensation and separation of moisture and heavy hydrocarbons from the gas) depends on the parameters of the expanded gas (pressure and temperature), and the location and shape of the blade, knocking the condensed liquid on the inner surface of the pipe.
The disadvantages of the local design supersonic tubes are fixed (hard) the position of the blade in the pipe, as well as the performance of the blade in the form of a flat plate, the front edge which generates a shock wave that provides centrifugation drip liquid to the pipe wall.
But for each gas composition and parameters there exists an optimal arrangement of the blade relative to the nozzle, that is, the blade must be able to move and be installed in cross-section, where the maximum is condensed fluid: after passing the nozzle in the gas flow amount of the condensed liquid increases and reaches the maximum value at a certain distance from the nozzle.
In addition, the shape of the blades must contribute to the garbage drip liquid on the inner surface of the pipe.
The technical task of the present invention is to increase the efficiency of the supersonic tube by increasing the volume of discharge in the pipe and the condensed moisture and heavy hydrocarbons from the gas supplied into the tube.
The technical result is achieved by the fact that in the supersonic tube containing the Laval nozzle, cyclone separator with vane diffuser for dry gas outlet and diffuser for removal of the condensed liquid, the blade is made in the form of a deformable plate, inserted into the screw groove made in the inner surface of the cyclone separator, while latina has length L PLnot less than1/2step screw groove S, and in the case of pipe cyclone separator installed clamps, the ends of which are screw groove, the distance between adjacent retainers mounted in the helical groove is equal to the length of the plate.
1 shows a General view of the supersonic tube, figure 2 - shape of the deformed plate after installing it in the helical groove, figure 3 - inputs to the diffusers, figure 4 - cross section of the pipe.
Supersonic tube consists of a Laval nozzle 1, the cyclone separator 2, plate 3, dry gas diffuser 4, the diffuser fluid 5, retainers 6.
Plate 3 is inserted into the screw groove δ cyclone separator 2, while it is deformed along a helical surface (see figure 2), fixed plate in the axial direction with the help of clamps 6 in several positions along the pipe axis with a step equal to the length of the plates.
Supersonic pipe works as follows.
Crude oil associated gas under pressure inlet PIand with the temperature TIserved in the nozzle 1, in a critical section which gas has a velocity corresponding to a Mach number equal to 1, then the gas is expanded to M=1,3...1.5 and enters the pipe cyclone separator 2, in which the gas pressure is reduced to ˜0,3PIand the temperature is reduced to ˜60°and from the initial values. When data parameters gas water present in the gas, as well as heavy hydrocarbons (C5+ higher) are condensed, and the degree of condensation increases as the distance of the stream from the nozzle and in a cross-section reaches the maximum value.
Formed drip the liquid descending on the screw surface of the blade 3, which generates a vortex of high tension, the gas flow is twisted and drip the liquid is discarded from the axis of the flow on the pipe wall.
The residence time of the gas inside the cold supersonic separator is only a few milliseconds, which prevents hydrate formation.
Further condensation on the pipe wall in the form of a thin liquid film flows into the diffuser 5, in which the speed of the liquid (and partially entrained with the liquid gas) is reduced, the pressure liquid-gas mixture increases up to 0,7...0,8 PI, after which the mixture is discharged in the tank for condensate collection.
The gas, which after passing the blade 3 is separated condensate enters the diffuser 4, in which the velocity of the gas flow is reduced and the pressure increased to 0,7...0,8 PI. Next, the dried gas is directed into the transport pipeline.
When working supersonic tube after a certain time to produce the changeover - slip plate 3 OS along the pipe and determine the data for specific parameters and gas composition, the optimum position of the plate, in which of pipe separates the greatest amount of condensation. Helical surface groove allows to displace the plate along the pipe without changing its shape.
Thus, the proposed solution improves the efficiency of the supersonic tube due to the helical surface of the blade, ensuring the generation of a vortex higher tension, but also due to the possibility of displacement of the blade without changing its shape along the pipe axis, which allows for the installation of the blade in the position corresponding to the maximum separation of moisture and condensate from the treated gas.
Supersonic pipe for gas transport to distant containing the Laval nozzle, cyclone separator with vane diffuser for dry gas outlet and diffuser for removal of the condensed liquid, characterized in that the blade is made in the form of a deformable plate, inserted into the screw groove made in the inner surface of the cyclone separator, and the plate has a length not less than1/2step screw groove and the casing pipe cyclone separator installed clamps, the ends of which are screw groove, the distance between adjacent retainers mounted in the screw groove is equal to the length of the plate.
FIELD: power-plant engineering, particularly cooling and microcryogenic equipment.
SUBSTANCE: microcooler comprises heat-insulated cylinder filled with gas and separated into cold and hot cavities with piston made of low-conductivity material. Heat-exchangers with cooling medium and medium to be cooled are arranged in the cavities. Piston is provided with regenerator and air-tightened drive shaft of electric engine having crank mechanism from hot cavity side. Drive is installed in sealed case fixedly connected to heat-insulated cylinder. Piston has throttle orifice and large orifice located from cold cavity side. The throttle orifice is provided with overflow valve communicated with cold cavity. Large orifice has overflow valve communicated with hot cavity. Cylinder interior is connected with compressed gas cylinder by means of controlled valve (reducer). Crank mechanism of engine additionally has tension spring. The first end of tension spring is connected to crankshaft neck of crank mechanism by means of additional connecting-rod. Another end thereof is fastened to inner section of sealed case so that above tension spring end is arranged in holder installed in place opposite to place of tightened shaft insertion in cylinder.
EFFECT: provision of stable drive operation, extended life and decreased vibrations during microcooler operation.
FIELD: cryogenic engineering.
SUBSTANCE: cryogenic system comprises compression unit, throttle, throttle heat exchanger, and heat exchangers. The throttle heat exchanger is made of nano-pipes connected in parallel. The heat exchangers are made of nano-pipes. The local constriction in nano-pipe represents the throttle. The compression unit is made of contact groups arranged along nano-pipe, or shaped nano-structure, or nano-pipes of alternative diameter.
EFFECT: reduced sizes, mass and power consumption.
FIELD: power machine building.
SUBSTANCE: invention can be used in gas transporting systems for producing electric power, cold resource and liquid fractions of heavy hydrocarbons from natural gas. Feed-power set has vortex regulator to which high-pressure gas main is connected, turbo-expander with generator, condensate collector and mixer. Vortex pipe is made in form of phase-selected vortex pressure regulator. Vortex pipe has supply pipeline connected with screw channel to provide internal positive "hot"-circuit feedback. Height-adjusted tangential nozzle is connected with temperature selection cylinder and with main stream discharge pipeline through diaphragm. Discharge pipeline is connected with pilot unit where temperature selection cylinder is closed with brake chamber. It has cross-piece with profiled blades, which smoothly straighten gas flow and it also has "hot" gas pass-by unit to let gas flow after cross-piece into center of "cold" vortex at axis of temperature selection cylinder. There are phase selectors onto surface of cylinder made in form of adjustable slits disposed along its length according to higher efficiency of removal of heavy hydrocarbons. Cold" output of vortex regulator is connected with separating section and with turbo-expander connected in turn with generator, condensate collector and gas mixer. Output of phase selectors of vortex regulator is connected in series with other input of condensate collector and then with throttle. Output of throttle and the other output of condensate collector are connected with gas mixer. Outputs of liquid fraction of separating section and condensate collector are connected with liquid fraction mixer.
EFFECT: improved efficiency of usage of pressure drop energy.
FIELD: compression machines, plants or systems using vortex effect.
SUBSTANCE: dehumidifier operation method involves precooling part of flow due to its expansion in expansion means, namely in gas-flow throttle or in vortex tube and cooling the main gas flow by precooled flow part; separating condensed moisture in moisture separator; cooling gas flow supplied to expansion means inlet by condensed moisture. Dehumidifier comprises high-pressure gas source, expansion means and moisture separator having drain pipe connected to cooling chamber of heat-exchanger which cools gaseous flow at expansion means inlet.
EFFECT: reduced power consumption.
5 cl, 3 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: 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: 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: 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: 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: 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: 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