Low-pressure heavy hydrocarbon gas stripping unit (variants)

FIELD: oil and gas industry.

SUBSTANCE: low pressure heavy hydrocarbon gas stripping unit includes a compressor mounted on a feed gas line, and a dephlegmator with condensate discharge line and a heat-mass exchange unit cooled by cooling agent. The method is characterized by that a multi-phase pump is installed as a compressor. A semi-blind plate is arranged in the dephlegmator above compressed raw gas inlet connected to raw gas line before the multi-phase pump by circulating reflux line, a reducing device and the heat-mass-exchange unit of the dephlegmator are arranged on the reflux line, condensate discharge line is connected to the separator equipped with residue discharge line and a line for feeding separation gas into the feed gas line before the multi-phase pump, and the condensate discharge line is connected to multi-phase pump by circulating condensate supply line. A version of the stripping unit is also claimed.

EFFECT: reduced power consumption by excluding the use of external coolant, which role is performed by recirculation reflux.

6 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: oil-and-gas industry.

SUBSTANCE: invention relates to the method of treatment of the flow of water-containing liquid hydrocarbons according to which the flow of liquid hydrocarbons is pumped into the first separator separating at least free water from the named flow of liquid hydrocarbons. The rest part of the named flow of liquid hydrocarbons is pumped into the system converting into gas hydrates the free / condensed water in the flow of liquid hydrocarbons in the named system and providing at least the first liquid flow and the second liquid flow in which the named first liquid flow is the liquid phase containing gas hydrates, and the named first liquid flow recirculates in the first separator and in which the second liquid flow contains dry gas and/or condensate/oil. The invention also relates to the system for treatment of the flow of water-containing liquid hydrocarbons.

EFFECT: effective dewatering of the production fluid flow.

39 cl, 4 dwg, 3 ex

Gas engine // 2369754

FIELD: engines and pumps.

SUBSTANCE: invention relates to engine production, particularly to ICE fuel systems. Proposed engine uses fuel gas mix and ignition initiator, and comprises fuel feed system. Liquefied or compressed gas is fed into aforesaid system from one tank, while liquefied or compressed ignition initiator is fed from another ignition tank for them to be mixed therein to produce liquefied or compressed mixed fuel. Engine incorporates also injector to feed fuel into combustion chamber. Fuel fed into engine injector comprises aforesaid mix. Fuel injector assembly comprises injector proper and separate fuel-mixing assembly. First fuel component is fed in the said mixing unit in the form of liquefied or compressed gas from one tank and second fuel component in the form of ignition initiator is fed from another tank. Aforesaid mixing assembly mixes the fist and second fuel components and feeds mixed fuel into injector. Note that both fuel components are fed through common fuel channel wherein they are mixed up prior to feeding into combustion chamber.

EFFECT: higher efficiency, reduced pollution.

21 cl, 5 dwg

FIELD: alternate fuels.

SUBSTANCE: fuel emulsion comprises 0.08-0.09 vol % of surfactant, in particular product obtained by treatment of mono- and dialkylphenol mixture with ethylene0,91-0,92% water oxide, and liquefied propane/butane gas - the rest. Emulsion shows high octane number and stability on storage.

EFFECT: allowed loss of volatile hydrocarbons and associated gases during oil production and processing to be diminished.

1 tbl, 4 ex

FIELD: oil and gas industry.

SUBSTANCE: method for additional drying and purifying of hydrogen-sulphide-containing associated gas for further usage as fuel in gas generator plants includes delivery of pre-separated gas under pressure of 0.05MPa to modular compressor station (5) for gas compressing and cooling. Then compressed gas under pressure of 0.52MPa is sent to gas-separating receiver (3) for additional drying upon compressing and cooling. Then gas is purified from mechanical impurities by series gas-treatment filter (6, 7). Purified and dried gas is delivered to modular power generating stations based on microturbines (4) for the purpose of its final usage. The system for associated gas drying and purifying contains in-series container doe separated associated gas (E-3), condensate tank (2), modular compressor station (4), gas-separating receiver (3), at least two series gas-treatment filters from mechanical impurities (6, 7) and at least two modular power-generating stations (4).

EFFECT: increased efficiency of associated gas drying and purifying.

20 cl, 1 dwg

FIELD: oil-and-gas industry.

SUBSTANCE: invention relates to the method of treatment of the flow of water-containing liquid hydrocarbons according to which the flow of liquid hydrocarbons is pumped into the first separator separating at least free water from the named flow of liquid hydrocarbons. The rest part of the named flow of liquid hydrocarbons is pumped into the system converting into gas hydrates the free / condensed water in the flow of liquid hydrocarbons in the named system and providing at least the first liquid flow and the second liquid flow in which the named first liquid flow is the liquid phase containing gas hydrates, and the named first liquid flow recirculates in the first separator and in which the second liquid flow contains dry gas and/or condensate/oil. The invention also relates to the system for treatment of the flow of water-containing liquid hydrocarbons.

EFFECT: effective dewatering of the production fluid flow.

39 cl, 4 dwg, 3 ex

FIELD: oil-and-gas industry.

SUBSTANCE: method includes two stages of absorption: at the first stage selective stripping with reference to carbon dioxide with release of sour gas with the content of carbon dioxide no more than 30-40%, and the stripped gas with the content of hydrogen sulphide no more than 5-7 mg/m3, sent further to the second stage of absorption with obtaining the stripped gas with the content of carbon dioxide no more than 50-200 mg/m3 and total absence of hydrogen sulphide, and sour gas with the content of hydrogen sulphide no more than 200 mg/m3 is performed. Saturation of alkylamine absorbent at each stage of absorption by sour components doesn't exceed 0.4 mol/mol, and natural gas has a hydrogen sulphide to carbon dioxide ratio, equal to 1.0, but no more than 1.5, and hydrogen sulphide concentration from 3.5 to 8.0 by the volume %. The unit comprises two series units for absorption stripping of gas comprising an absorber, a regenerator, pumps, a refrigerator, a recuperative heat exchanger, a boiler, a vessel and pipings of units of absorption stripping of gas.

EFFECT: invention provides effective stripping of natural gas from carbon dioxide and hydrogen sulphide.

19 cl, 2 dwg, 3 ex, 1 tbl

FIELD: oil and gas industry.

SUBSTANCE: group of inventions is related to desulphurisation of hydrocarbons. The method includes the following stages: (i) passage of the mixture of hydrocarbon and hydrogen through desulphurisation catalyst with conversion of organosulphur compounds present in the above hydrocarbon to hydrogen sulphide; (ii) passage of the obtained mixture through sorbent of hydrogen sulphide containing zinc oxide with reduction of hydrogen sulphide content in the mixture; and (iii) passage of gas mixture lean with hydrogen sulphide through additional desulphurising material. The additional desulphurising material contains mouldable mixture of one or more nickel compounds in the form of particles, the carrier material containing zinc oxide in the form of particles and optionally one or more compounds of promoted metals in the form of particles selected from iron, cobalt, copper and precious metals. At that the above desulphurising material contains 0.3-20 wt % of nickel and 0-10 wt % of promoted metal. The hydrocarbon stock reforming method is suggested with usage of the above hydrocarbon desulphurisation method.

EFFECT: increased efficiency of hydrocarbon desulphurisation with sulphur content up to <5 parts per billion.

17 cl, 7 tbl

FIELD: oil and gas industry.

SUBSTANCE: invention is related to combustible gas enrichment system capable to improve energy saving performance considering service life of a suction device, wherein the combustible gas enrichment system comprises an adsorption unit filled with adsorbing agent for selective adsorption of combustible gas; the initial gas feed unit capable of feeding initial gas comprising combustible gas to the adsorption unit from outside area; the suction device capable of gas suction from inner part of the adsorption unit and a control device to perform absorption and desorption process, at that the control device ensures operation of the suction device so that suction force of the suction device is less when desorption process does not take place than the suction force of the suction device when desorption process takes place.

EFFECT: improved energy saving performance.

5 cl, 6 dwg, 6 tbl

FIELD: oil and gas industry.

SUBSTANCE: invention is related to method for liquefaction of nitrogen-containing input fraction enriched with hydrocarbons, preferably natural gas. The method includes the following stages: a) the feed fraction (1) is burned (E1, E2); b) divided by fractional distillation (T1) to the fraction enriched with nitrogen (9), wherein methane content is max. 1 vol. %, and the nitrogen-depleted fraction enriched with hydrocarbons (4); c) the above fraction (4) is overcooled (E3) and expanded (b); d) the expanded nitrogen-depleted fraction enriched with hydrocarbons (5) is divided (D1) into liquid fraction enriched with nitrogen (6), wherein nitrogen content is max. 1 vol. %, and fraction enriched with nitrogen (7); and e) the fraction enriched with nitrogen (7) is added to the feed fraction (1).

EFFECT: method allows removal of all nitrogen contained in the feed fraction either by liquid product gas or by highly-concentrated nitrogen fraction.

7 cl, 2 dwg

FIELD: oil-and-gas industry.

SUBSTANCE: invention relates to a gas drying method. The proposed method comprises forcing of gas through one or several cooling chambers connected in series. Note here that a solvent flow is fed into every chamber to remove water from the gas. Then, the mixed flow of the gas and solvent is fed in every cooling chamber to be cooled therein and, thereafter, to be separated by a gas-fluid separator into the gas flow with the reduced water content and the solvent flow enriched with water. The water content in the gas is gradually decreased sequentially in all the cooling chambers. Note also that every flow of the solvent separated and enriched with water is either used as an upstream cooling chamber feed flow or returned to a recovery unit for water separation. Note also that the solvent downstream of the coiling chamber is directed from the gas-fluid separators into the recovery unit to be recycled and fed upstream of the last chamber to the mix of the gas and solvent. The recovered solvent flow downstream of the recovery unit is fed to the gas flow of the last downstream chamber, the solvent separated downstream of the said chamber is fed to all other upstream cooling chambers.

EFFECT: perfected method.

7 cl, 2 dwg

FIELD: oil-and-gas industry.

SUBSTANCE: invention relates to a method of drying of natural gas or industrial gas containing acid gaseous components. Gas is dried to remove acid gaseous components therefrom. The same physical solvent is used at both process steps. Gas to be dried is brought in contact with a physical solvent to absorb the major portion of water contained therein. The physical solvent being enriched with water is fed to the solvent recover unit wherein the said solvent is heated. Water contained in the solvent is separated in a countercurrent at the solvent recovery unit with the help of the flow of acid gas extracted from the dried useful gas during absorption of the acid gas. Note here that the acid gas is, again, released at the said recovery unit and separated from the solvent and released from the said unit for the solvent recovery. The invention relates also to a plant for the implementation of the described process.

EFFECT: invention provides efficient gas drying.

20 cl, 1 dwg

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