Method for processing low-pressure hydrocarbon gases and liquid hydrocarbons

FIELD: oil and gas industry.

SUBSTANCE: gas is compressed and cooled under the condition of refluxing and stabilizing of the reflux liquid at the initial stages of compression, together with the gases of low pressure stabilization to obtain a low pressure condensate and compressed gas, which is dried, purified, and mixed with a gas of high pressure stabilisation, compressed and cooled under refluxing and stabilising of the reflux liquid in the third stage, using the gas of low temperature separation as the refrigerant to obtain propane-butane fraction and the compressed gas. The latter is reduced and separated, with obtaining the low-temperature separation gas, which is heated by the liquid hydrocarbons released during gas compression at the third stage, and extracted as the treated gas, and the condensate, which is stabilized with obtaining the stabilisation gas of high pressure and the propane fraction. The liquid hydrocarbons are stabilised together with the condensate of low pressure to obtain the stabilisation gas of low pressure and stable gasoline.

EFFECT: improvement of the quality and range of the products.

4 cl, 1 dwg

 



 

Same patents:

FIELD: machine building.

SUBSTANCE: inventions can be used in air-cooled devices (further - ACD), where during operation in conditions of cold climate of northern regions the gas hydrates can be formed. Tube banks are made with the slope minimum 1:100 upstream, and under the lower row of pipes gas bare bypass pipes fixed from the one side in the lower zone of the input camera, from the other side affixed to the pipes of gas extraction, are located with the slope towards downstream. Gas is conveyed by the cooled pipe bank with the rise downstream, with the beginning of thaw of formed hydrate plugs free draining of the melted water from hydrated pipes to the lower zone of the input camera is organised, and it is further conveyed by bare bypass pipes with the slope towards the pipe for extraction of the cooled gas.

EFFECT: achieving of the cooled gas temperature is lower than the temperature of hydrate forming start, prevention of cracking at the surface of heat exchanging tubes and avoidance of their disruption at the expense of removal of hydrate plugs.

3 cl, 1 dwg

FIELD: oil and gas industry.

SUBSTANCE: invention is related to preparation of hydrocarbon gas for processing or transportation. The installation for hydrocarbon gas preparation contains the compressor station, gas chiller and gas-liquid separator interconnected by pipelines. The separator is equipped with liquid and gas outlets. Gas outlet is connected by the pipeline to adsorption dehydration unit. The outlet of the compressor station is connected additionally to the pipeline equipped with control valves, the pipeline connecting gas outlet from the gas-liquid separator to the adsorption dehydration unit. Control valves ensure flow rate regulation.

EFFECT: invention is oriented towards improvement in reliability of gas preparation process as well as in increase of adsorbent service life at reduction of capital and operational costs.

1 dwg

FIELD: machine building.

SUBSTANCE: gas compressing and drying device comprises a multistage compressor with a low pressure stage, a high pressure stage and a delivery branch pipe, and an adsorption dehumidifier with a drying zone and a regeneration zone; at that an intercooler is set between the low pressure stage and the high pressure stage. The device is additionally equipped by a heat exchanger comprising a main chamber with an inlet part and outlet part for the first primary fluid medium, and the ends of the heat exchanger tubes are connected to a separate input chamber and output chamber for each tube bundle; the first tube bundle forms a cooling circuit of the intercooler used to heat the gas from the high pressure stage for the purpose of adsorption dehumidifier regeneration.

EFFECT: simplified design and installation, reduced prime cost of the device.

14 cl, 4 dwg

FIELD: oil and gas industry.

SUBSTANCE: invention pertains to oil and gas industry and it can be used for gas treatment at oil and gas condensate deposits in order to reduce capital and operational costs. Gas treatment installation is equipped with automatic control system (ACS) connected to shutoff and control valves including the first throttle valve at gas feed line, the second throttle valve installed at the line connecting primary and low-temperature separators, the third and fourth throttle valves installed at lines connecting outputs of primary and low-temperature separators for liquid-gas mixture respectively with degasifier, the fifth throttle valve installed at line of liquid discharge from degasifier and the sixth throttle valve installed at line of gas release from degasifier. The installation is equipped with the first flow metre at gas feed line and the second flow metre at line of gas discharge from low-temperature separator connected to ACS and having ability to regulate degree of opening and closure for the first throttle valve, temperature sensor at input of low-temperature separator connected to ACS and having ability to regulate degree of opening and closure for the second throttle valve, liquid level gage in primary and low-temperature separators and degasifier connected to ACS and having ability to regulate degree of opening and closure for the third. Fourth and fifth throttle valves respectively and pressure nozzle in degasifier connected to ACS and having ability to regulate consumption of inhibitor depending on pressure of gas in feed line or its flow rate. ACS uses software system for gas treatment regulation which includes regulation of process parameters in automatic mode.

EFFECT: designing installation for primary treatment of gas supplied from gas wells in clusters that operates in unmanned mode due to use of software system for automatic regulation of gas treatment.

1 dwg

FIELD: chemistry.

SUBSTANCE: method of dehydrating a gas containing CO2 is based on preparing a two-phase mixture with expansion thereof and separating the liquid phase from the mixture in a separator. Raw gas is cooled by adding liquid CO2 with water dissolved therein; the obtained mixture is separated into a gas phase and a liquid phase containing water; the gas phase is expanded to obtain a liquid containing liquid CO2 and water; the liquid is partially or completely fed for mixing with raw gas, wherein expansion is carried out to temperature below the hydrate formation point.

EFFECT: higher degree of dehydration of the gas.

12 cl

FIELD: heating.

SUBSTANCE: gaseous helium cooling and cleaning device includes a cryostat, a liquid nitrogen level transmitter, a heat exchanger arranged in gaseous nitrogen environment, a heat exchanger placed in liquid nitrogen, a filter collecting frozen hazardous impurities, a helium electric heater and a nitrogen electric heater for regeneration of saturated filter. Device is equipped with two units installed in parallel after the filter, each of which includes an in-series located electropneumatic valve and a check valve. One unit is connected to the heat exchanger located in gaseous nitrogen environment and provided with two cavities, and the other one is connected to helium supply pipeline to the consumer after additional check valve installed after helium electric heater.

EFFECT: high cleaning quality of helium from hazardous impurities at provision of requirement for widening the temperature range of the environment and tanks filled with cryogenic fuel components.

1 dwg

FIELD: instrument making.

SUBSTANCE: proposed heat exchanger comprises, at least, two heat exchange sections made with single tube plate whereto condensate collection chambers introduced to the inlet of every said section and furnished with condensate discharge branch pipes. Heat exchange tubes inside chambers are provided with holes or fractures.

EFFECT: reduced metal input and vapour circuit drag, lower costs.

8 cl, 7 dwg

FIELD: chemistry.

SUBSTANCE: device for purification of liquefied hydrocarbon gases from acidic components includes pipeline 1 of supply of flow of liquid hydrocarbons for purification, connected with evaporation unit 2, which has pipeline 7 of output of flow of liquefied hydrocarbon gases and pipeline 3 of output of gas phase flow, connected with unit 4 of removal of acidic components, provided with pipeline 5 of output of purified gas phase flow. Installation is provided with unit 6 of absorption of gas phase purified flow from unit of removal of acidic components, as well as connected through additionally installed unit 8 of cooling with pipeline 7 of output of flow of liquefied hydrocarbon gases from evaporation unit 2. Absorption unit 6 has pipeline 9 of output of purified flow of liquefied hydrocarbon gases and pipeline 10 of output of undissolved part of gases. Unit 6 of absorption of gas phase purified flow can be connected with pipeline of output of gas phase purified flow from unit 5 of removal of acidic components through additionally installed unit 11 of gas phase washing or through additionally installed unit 17 of gas phase drying.

EFFECT: invention makes it possible to purify flow of liquefied hydrocarbon gases from acidic components and obtain purified hydrocarbons in liquid form.

1 dwg, 1 ex

FIELD: power engineering.

SUBSTANCE: method to produce liquefied hydrocarbon gases includes stabilisation of a deethanised gas condensate by extraction of hydrocarbon gases from it, their cooling, mixing of liquefied hydrocarbon gases (LHG) with water, washing of methanol and phase separation into LHG and a water-methanol solution. At the same time at the washing stage the mixture of LHG with water is dispersed in water phase, then coalescence of finely dispersed drops of the water-methanol solution is carried out, afterwards phase separation is carried out. A plant to produce liquefied hydrocarbon gases comprises the following serially joined components: a rectification tower of gas condensate stabilisation, a cooling device, a mixing device, at least one reservoir for methanol washing and a separating reservoir. At the same time at least one reservoir for methanol washing and the separating reservoir are arranged in the form of sections of a reservoir filter, separated by two partitions with coalescent filter cartridges installed in them to form three sections in the inner cavity of the specified filter, besides, two sections represent reservoirs of methanol washing, and the third section - a separating reservoir.

EFFECT: using the invention will make it possible to minimise capital and current costs for a plant due to its simplification.

5 cl, 3 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to chemistry. Hydrogen sulphide is removed from natural gas flow bearing methane CH4 and H2S to cool said flow in heat exchanger 13, 16, 18. At least, portion of cooled flow is fed via feed pipeline 19, 21 into cyclone expander-separator 1. Here, cooled flow is expanded in nozzle 4 to be additionally cooled to temperature and pressure below dew point of hydrogen sulphide and separated in tubular separation chamber 9 into fraction of cooled low-density fluid. Said fraction is rich in methane and hydrogen sulphide depleted. Another fraction of aforesaid cooled flow represents high-density fluid rich in hydrogen sulphide and methane-depleted. Low-density cooled fluid flow is fed in gas product pipeline 33 communicated with heat exchanger 14 to cool down natural gas flow fed into cyclone expander-separator 1. High-density cooled fluid flow is fed in fractionator 8 for additional separation.

EFFECT: higher yield.

4 dwg

FIELD: chemical industry; metallurgy industry; medical equipment; lighting engineering and nuclear physics; methods and the devices for the deep purification of xenon isotopes from the gaseous impurities.

SUBSTANCE: the invention is pertaining to the method and the device for the deep purification of xenon isotopes from the gaseous impurities. The invention may be used in chemical industry, metallurgy, in production of medical equipment, in lighting engineering and nuclear physics for determination of mass of a neutrino. The initial mixture of xenon isotopes with impurities is fed into one of the freezing devices 2 or 3 of the stage of the gaseous centrifuges 1 through one of the branch-pipes 19 or 20 at the open gate units 7, 8 or 9, 10. Isotopes of xenon and the part of the gaseous impurities are settling on the walls of the one of the freezing devices 2 or 3. The non-settled gaseous impurities having the pressure of the saturated steam exceeding the pressure of the isotopes of are removed by the vacuum system 6. Then terminate feeding of the initial mixture by closing gates 7, 8 on the branch-pipe 19 or gates 9, 10 on the branch-pipe 20. For keeping the process continuity the device contains of no less than two freezing devices 2 or 3, each of which is connected in parallel to the stage of the centrifuges 1 and in series - to the accumulating balloon 4 or 5, which is in advance frozen refrigerated in the Dewar flask 16. At first the freezing device 2 or 3 works in the mode of freezing, and then - in the mode of warming-up and taking the isotopes off. The modes switching is exercised by opening gates 8, 26 and 13 of the pipeline 24 or gates 10, 27 and 14 of the pipeline 25. The heating-up of the freezing device 2 or 3 up to the temperature of (-70°C)-(-80°C) is exercised by removing the Dewar flask 15 or 23. The withdrawal of the purified xenon isotopes is conducted at the residual pressure of(3-10)·10-3 mmHg. Operation of the freezing device 2 or 3 with the accumulating balloon 4 or 5 in pairs is interleaved in the indicated modes of operation. The invention ensures a continuity of the process of deep purification of xenon isotopes from the various gaseous impurities, does not require the complex installations, allows to reduce expenditures. The contents of the gaseous impurities in the final product does not exceed 4.4 ppm.

EFFECT: the invention ensures a continuity of the process of deep purification of xenon isotopes from the various gaseous impurities, absence of the need in the complex installations, reduced expenditures.

5 cl, 5 dwg, 1 tbl

FIELD: gas, petrochemical and other industries.

SUBSTANCE: proposed unit includes the following components connected in succession by gas route: intake separator 1, scrubber 3, first compression stage 4, air cooling apparatus 5, intermediate separator 6, gas high drying set 7, second compression stage 8, second air cooling apparatus 9 and second intermediate separator 10. Gas outlet of second intermediate separator 10 is connected with gas and condensate transportation pipe line and with inlet of fuel gas preparation set 11 of gas-turbine drive. One outlet of preparation set 11 is connected with inlet for delivery of fuel gas to gas-turbine engines and second outlet is connected with inlet for delivery of reactivation gas to gas high drying set 7. Pipe line for escape of reactivation gas from gas high drying set 7 is connected with delivery pipeline of first compression stage 4 in front of air cooling apparatus 5. Proposed unit makes it possible to improve quality of gas and condensate by water dew point during preparation for transportation.

EFFECT: high degree of cleaning gas from toxic admixtures; increased service life of compressor equipment; reduced capital outlays; improved quality of gas and condensate.

1 dwg

FIELD: organic chemistry, oil industry.

SUBSTANCE: the invention relates to development of a method for associated petroleum gas filtering from heavy hydrocarbons at temperatures, with the possibility of subsequent burning in power plants. The produced petroleum gas is passed through the main pipeline obvoluted by a part of process water pipeline while the bypassing line of the gas pipeline is closed by a valve. Under low temperatures, heavy hydrocarbons are deposited on the walls of the gas line and absorbed by a replaceable zeolite filter. The polluted gas line is closed by a valve, the replaceable zeolite filter is removed for thermal regeneration. For the duration of the gas line closing, the associated petroleum gas is passed through a bypassing line. The pressure gauges installed before and after the pipeline part being cooled are used to determine the degree of pollution of the gas line. The usage of the invention will allow to create a method of associated petroleum gas filtering from heavy hydrocarbons at low temperatures, with the possibility of subsequent burning in power plants.

EFFECT: filtering of associated petroleum gas from heavy hydrocarbons at low temperatures, with possibility of subsequent burning in power plants.

1 dwg

FIELD: chemistry, processing technology.

SUBSTANCE: method for nitrogen elimination include condensed natural gas introduction into distillation column first position, nitrogen enriched vapour flow discharge from the distillation column head part, and purified condensed natural gas flow intake from distillation column lower part. Cold reflux flow is input into the distillation column second position, situated upwards from the first position. The method also includes either purified liquid natural gas flow cooling, or condensed natural gas flow cooling, or cooling both purified liquid natural gas flow and condensed natural gas flow.

EFFECT: nitrogen elimination with minimum methane loss, and providing forced cooling of liquid natural gas.

33 cl, 8 dwg

FIELD: oil and gas industry.

SUBSTANCE: invention refers to oil and gas industry, particularly to facilities for natural gas treatment. The method of natural gas preparation includes supply of natural gas with source excessive pressure to the facility, preliminary cleaning of gas from condensed moisture and mechanical impurities and drying of gas by means of its cooling and removal of condensed moisture. Cooling of gas is carried out in two stages, at that, the second stage of gas cooling is performed by introducing of liquefied gas directly into the flow of gas being cooled, while at the first stage cooling is performed by heat exchange via a heat exchanging surface between the supplied gas and gas obtained at the second stage of cooling, and removal of condensed moisture is done after the second stage of cooling. At the automobile gas filling compressor station (AGFCS) downstream of gas, a unit of preliminary cleaning of natural gas, the first reservoir of a cooling unit, a mixer, a facility for removal of condensed moisture, the second reservoir of the cooling unit and units for compremiring, accumulating and charging of tanks are successively connected to each other. The reservoir for storage of liquefied gas is connected to the mixer of cooled and liquefied gas.

EFFECT: facilitating stabilisation of gas composition for contents of water vapours after gas preparation; simplification of its design and automation, reducing of metal consumption of AGFCS and operational costs.

4 cl, 1 dwg

FIELD: oil and gas industry.

SUBSTANCE: gas-dynamic separation method refers to the devices of low-temperature treatment of multi-component hydrocarbon gases (natural and oil ones), and is meant mainly for gas dehydration by condensing water component and (or) hydrocarbon components therefrom, and can be used in multi-component hydrocarbon gas collection, preparation and processing systems. Gas-dynamic separation method involves supply of high-pressure multi-component hydrocarbon gas flow to the nozzle, its isenthalpic expansion and cooling when passing through the nozzle, component condensation in cooled gas flow, condensate separation from gas phase, removal of cleaned gas and condensate, pressure increase of cleaned gas flow by its deceleration in diffuser. Original gas flow is pre-cooled by means of heat exchange with gas flow leaving the nozzle; components are condensed, separated from gas phase and removed at original gas pressure or (and) gas pressure after it has been expanded in the nozzle; gas phase is supplied to the nozzle after condensate is removed therefrom at original gas pressure, and pressure of expanded and cleaned gas flow is increased after its heat exchange with original gas.

EFFECT: improving gas-dynamic separation efficiency, and reducing energy consumption.

5 cl, 6 dwg, 7 tbl, 4 ex

FIELD: chemistry.

SUBSTANCE: system and method for extraction of reusable grade of sulphur hexafluoride (SF6) from the source of possibly contaminated gas are claimed. The system includes extractive vessel (10) connected with the source of possibly contaminated gas. The first cryogenic means (15) decrease the temperature of the extractive vessel below the phase transition temperature of SF6 which cause the pressure difference leading to natural intake of possibly contaminated gas to extractive vessels(10). In extractive vessel (10) gaseous SF6 passes into liquid or solid state. Uncondensed contaminated gas is evacuated from extractive vessel (10). The recuperation vessels (22) are connected to extractive vessel. The second cryogenic means (25) is used for decrease of recuperation vessels (22) temperature. The temperature increase in extractive vessels (10) generates the pressure difference leading to natural intake of reusable grade of sulphur hexafluoride (SF6) to recuperation vessels (22).

EFFECT: providing of rapid sulphur hexafluoride extraction without usage of heavy duty pumping equipment.

28 cl, 2 dwg, 2 tbl

FIELD: oil-and-gas production.

SUBSTANCE: natural gas dehydration equipment with a double-stage cooling of incoming gas consists of gas preliminary stripping equipment and cooling unit with container for liquefied gas storage and mixer for cooling and liquefied gas. Cooling unit equipped with two sequentially located heat-mass transfer apparatus with fittings for gas supply and gas disposal which do not interact with water and insoluble cooling liquid, and mixer located on the gas line, which connects fitting for gas disposal of the first and fitting of gas supply of the second heat-mass transfer apparatus. Heat-mass transfer apparatus made as hollow packed columns or flooded bubble columns.

EFFECT: arrangement of easy and reliable natural gas dehydration during preparation of its liquation and compression, stabilising of gas content in terms steamed water content after natural gas dehydration procedure, design simplification and decrease dehydration equipment of metal content, design simplification of a automobile gas filling station or liquation stations, simplification of automation works of dehydration equipment installation and decrease of operational costs.

4 cl, 1 dwg

FIELD: heating, ventilation.

SUBSTANCE: device for removing harmful gases from atmosphere consists of a platform independently operating in the specified area of atmosphere, which case is made with the use of light constructions and is equipped with inputs for surrounding atmosphere, as well as outlets for processed products. Inside the case there are blocks for extraction and separation of gases, as well as for accumulation and processing of liquid and gaseous products. At that the energy for operation of separate blocks of this closed cryogenic circulation system is created by solar batteries or a thermoelectric generator.

EFFECT: use of the device enables to create the appliance for removing harmful gases, and which does not produce its own emissions of harmful substances.

6 dwg

FIELD: oil and gas production.

SUBSTANCE: installation consists of compressor with steps of high and low pressure connected with pipelines, of inter-step gas condenser installed after step of low pressure, of separator separating gas from impurities, of end gas condenser installed after step of compressor high pressure, of separator for separation of gas from liquids and of three-phase divider. Also, the installation is equipped with a pipeline for supply of methanol connected to the pipeline of gas supply to the end condenser after the step of high pressure of the compressor and the pipeline for supply of water-methanol solution from the three-phase divider connected to the pipeline of gas supply to the separator for separation of gas from impurities.

EFFECT: upgraded quality of preparation of gas at reduced capital and operational expenditures.

5 cl, 1 dwg

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