RU2570795C1 - Gas refining and gas chemical complex - Google Patents

Abstract

FIELD: oil and gas industry.

SUBSTANCE: invention is referred to gas refining and gas chemical complex that includes gas refining sector wherein natural gas is delivered as raw material for raw stock preparation stage 1.1 with receipt of dried gas and acid gas directed respectively to temperature fractioning stage 1.2 and to stage of elementary sulphur production when hydrogen sulphide is unavailable in initial raw material 1.5, to the stage for production of commercial methane fraction (commercial gas) 1.3 methane fraction is delivered from the stage 1.2 with receipt of nitrogen, helium concentrate sent to the stage of commercial helium production 1.6 and methane fraction from the stage of produced total amount of liquefied hydrocarbon gases (LHG) and pentane-hexane fraction 1.4, broad fraction of light hydrocarbons is delivered from the stage 1.2 with receipt of propane, butane, isobutane and pentane-hexane fraction, industrial and automobile propane-butane, sector on liquefaction of natural gases, which consists of the stage of methane fraction (commercial gas) liquefaction 1.12 combined with flow of methane fraction from the stage 1.3 and the stage of ethane fraction liquefaction 1.13 combined with flow of ethane fraction from the stage 1.2 with production of commercial gas, gas chemical sector wherein ethylene as raw material for the stage of ethylene production 1.7 is delivered from the stage 1.2, ethane fraction with production of ethylene and hydrogen for the stage of polypropylene production 1.8 is delivered from the stage 1.4, propane fraction for the stage of production of synthetic gas, methanol and higher alcohols, ammonia 1.10 are delivered from the stages 1.12, 1.1 and 1.7-1.8 respectively, commercial gas, acid gas and hydrogen with production of methanol and ammonia from the stage of polymer and copolymer production 1.9 is delivered from stages 1.8 and 1.7 respectively, propylene and ethylene partially with receipt of polyethylene, copolymer and polypropylene for the stage of ethylene glycols production 1.11 is delivered for the stage 1.7, remaining part of ethylene with production of mono-, di-, thriethylene glycols, sector of condensate pretreatment wherein as raw material for the stage of condensate stabilisation 1.14 unstable gas condensate is delivered, for the stage of motor fuels production 1.15 stable gas condensate is delivered, pentane-hexane fraction and hydrogen respectively from the stages 1.14, 1.4 and 1.7-1.8 are delivered with production of high-octane petrol, kerosene and diesel fractions, at that limit hydrocarbon gases discharged from the stage 1.15 and stabilising gas from the stage 1.14 are directed to the stage 1.1, considering the fact that movement of process flows between adjacent sectors is ensured by additional pump stations.

EFFECT: complex allows highly effective refining of natural hydrocarbon gases of one or several deposits with production of maximally versatile assortment of final products.

46 cl, 1 ex, 1 tbl, 1 dwg

Description

Gas processing and gas-chemical complex for processing natural hydrocarbon gases of various fields, providing gas processing in the gas producing region, which can be used in the gas industry in conditions of its intensive development.

Natural gas processing plants are large-capacity industrial plants that process up to several billion nm ³ per year of raw gas (several million tons per year). However, in conditions of intensive development of the gas industry, natural gas production volumes increase sharply precisely in those regions where there are no additional technical and human resources. So, for example, in Eastern Siberia and the Far East back in 2010, only 33 billion nm ^{3 of} natural gas was produced per year, of which only 65% was processed, and the remaining 35% was pumped back into the reservoir or flared, but long-term development plans of these regions, the production of natural gas in them by 2030 should be brought up to 200 billion nm ³ per year. At the same time, the construction of dozens of large-capacity gas processing plants will be required, which inevitably should lead to fragmentation of the economic potential of the region, the cost of building gas processing plants and an increase in the cost of gas processing. In order to concentrate the economic potential in the processing of 200 billion nm ³ per year of natural gas, it is planned to build 3 of the largest gas processing plants and gas chemical plants in this region with investments up to 160 billion rubles up to 2030 (A.G. Korzhubaev, I.V. Filimonova, Prospects for the integrated development of the oil and gas industry of Eastern Siberia and the Far East. Gas industry, 2011, No. 6, p. 10-16).

Such gas processing plants with a capacity of 20 to 70 billion nm ³ per year for processed gas will be able to serve several natural gas fields simultaneously. So, for example, at one multitonnage gas processing plant in the Irkutsk region, it is planned to process natural gas from several fields at once: Kovykta (40 billion nm ³ per year), Chikansky and Angaro-Lensky (18 billion nm ³ per year). (A.G. Korzhubaev, I.V. Filimonova Prospects for the integrated development of the oil and gas industry in Eastern Siberia and the Far East. Gas Industry, 2011, No. 6, p. 10-16).

With such a high power of a gas processing plant, it becomes inexpedient to provide at the plant only preliminary preparation of natural gas for its subsequent transportation to consumers as fuel.

Natural gas, which consists mainly of methane, contains a number of impurities, in particular, water, nitrogen, hydrogen sulfide, carbon dioxide, helium, mercaptans, light hydrocarbons (ethane, propane, butane), which on the one hand are harmful impurities, deteriorating to one degree or another the quality of commercial gas, and on the other hand, on the contrary, valuable components that are raw materials of the gas chemical industry (production of methanol, elemental sulfur, sulfides, unsaturated hydrocarbons, etc.). Moreover, any impurities to methane in natural gas reduce the calorific value of natural gas as a fuel. When light hydrocarbons are extracted from natural gas, it becomes economically inexpedient to transport them over long distances, especially in the conditions of Siberia and the Far East, to petrochemical enterprises, which sets the task of forming a gas processing and gas-petrochemical complex with its optimal location in this region.

Natural gas of various deposits differs significantly both in the content of impurities and in their selection, for example, the classification of natural gases by their helium content includes rich natural gases (more than 0.5% helium), ordinary (0.1 ÷ 0, 5%) and poor (less than 0.1%). For example, natural gas from the Kovykta field contains up to 1% vol. nitrogen and helium, which makes it appropriate to isolate helium (patent for invention RU No. 2478569 C1, IPC СВВ 23/00, С07С 1/04, claimed November 16, 2011, published April 10, 2013), helium reserves in Siberian natural gases and the Far East make up 85% of the country's reserves (A.E. Kantorovich, A.G. Korzhubaev, L.V. Eder, Raw material base and development prospects for the helium industry in Russia and the world, Institute of Oil and Gas Geology SB RAS, electronic article published on the website www.geoinform.ru).

A large number of patents are known that protect systems for the processing of natural hydrocarbon gases, but all of them are aimed at solving particular problems that do not provide a comprehensive solution for the effective use of all components that make up natural gases.

A known method of processing natural gas and a device for its implementation for the separation of natural gas helium concentrate, nitrogen, methane and liquid hydrocarbons (ethane and above). The device includes eighteen heat exchangers, a demethanizer, five separators, a methane refrigeration compressor, a nitrogen enrichment column, two expander-compressor units, an ejector, a nitrogen and methane separation column, a helium column, a pump and seven chokes (patent RU RU 2502545 C1 , IPC B01D 53/00, F25J 3/00, С07С 7/00, notified 08.08.2012, published 12.27.2013). The disadvantages of this device are:

- the separation of liquid hydrocarbons from ethane and above is inefficient, since this fraction cannot serve as a marketable product and must be transported for further processing to another enterprise, while liquefying ethane requires the implementation of the fractionation process at low temperatures, leading to unnecessary costs;

- purification of hydrocarbon gas from hydrogen sulfide and carbon dioxide is not provided, which reduces the calorific value of the generated fuel gas.

A known installation that implements a method for the preparation and processing of petroleum gas, which first provides adsorption drying and gas purification, and then part of the stream of dried and purified gas is fed into contact with a hydrate inhibitor, after which a gas stream enriched with vapor of a hydrate inhibitor is mixed with the main stream of dried and purified gas. The main stream of the dried and purified gas before mixing with the gas stream enriched with vapors of the hydrate inhibitor is pre-cooled to a temperature of minus 30 ° C minus 65 ° C, partially condensed and separated. The mixture obtained as a result of mixing is directed to deep cooling to a temperature of minus 80 ° С - minus 110 ° С (Patent for invention RU No. 2384359 C1, IPC B01D 53/26, F23J 3/06, claimed 11.08.2008, published March 20, 2008. 2010). The disadvantages of this invention are:

- the products of adsorption drying and gas purification after regeneration of the adsorbent are released into the atmosphere, in particular, hydrogen sulfide, which leads to significant environmental pollution;

- hydrocarbons that are useful as a gas chemical raw material are not isolated from natural hydrocarbon gas, starting with ethane, which leads to an irretrievable loss of these hydrocarbons during the combustion of hydrocarbon gas as fuel and a decrease in its calorific value;

- deep gas cooling during processing to minus 80 ° C minus 110 ° C leads to excessive costs, since neither further gas transportation nor gas processing on site require such deep cooling when using hydrate inhibitors.

A known installation for the processing of natural hydrocarbon gases, including technological units of distillation columns with associated equipment for extracting gas from automobile propane, automobile propane-butane mixture, aviation condensed fuel to produce stripped gas (utility model patent RU No. 116980 U1, IPC, F25J 3 / 02, announced on January 11, 2012, published on June 10, 2012).

The disadvantages of this invention are:

- low calorific value obtained topped gas, because it contains inorganic impurities - water, hydrogen sulfide, carbon dioxide, helium, nitrogen, which are inevitably contained in the feedstock;

- the content in the final stripped gas of inorganic impurities - water, hydrogen sulfide, carbon dioxide, helium, nitrogen leads to additional costs when transporting it to gas consumers;

- the presence in the resulting stripped gas of a significant amount of ethane, which is more appropriate to use not as a component of fuel gas, having a calorific value lower than methane, but as a raw material for gas chemical production.

A known installation for the processing of natural and associated petroleum gases, including process units with associated equipment for drying and purifying gases from sulfur compounds and carbon dioxide and subsequent extraction from helium gases (patent for invention RU No. 2486945 C1, IPC B01D 53/22, B01D 61 / 00, F25J 3/00, claimed 05.05.2012, published 10.07.2013). The disadvantages of this invention are:

- sulfur compounds and carbon dioxide emitted during the purification of natural gas are not further processed and pollute the environment;

- the fuel gas produced contains significant amounts of ethane, propane and heavier hydrocarbons, which are more appropriate to use not as components of the fuel gas, having a calorific value lower than methane, but as raw materials for gas chemical production.

There is also a production of natural gas processing, including technological units with associated equipment for drying and purifying gases, gas condensate from it, which is subjected to stabilization, platforming and separation to produce commercial dried gas and liquid hydrocarbons C ₅ and higher with as final products the presence of aromatic hydrocarbons (patent RU No. 2435827 C1, IPC G10G 5/00, C10L 3/10, C07C 9/00, filed November 15, 2010, published December 10, 2011). The disadvantages of this invention are:

- low calorific value of the obtained stripped gas, since it contains a significant amount of C ₂ -C ₅ hydrocarbons having a lower calorific value than methane;

- the presence of C ₂ -C ₅ hydrocarbons in the produced stripped gas, which are more suitable to be used not as components of fuel gas, but as raw materials of gas chemical production;

- a narrow range of products - stripped gas and a mixture of liquid hydrocarbons.

It is also known to manufacture natural hydrocarbon gases, including process units for extracting water, carbon dioxide, hydrogen sulfide and C ₂ and above hydrocarbons from gases, helium sold at the Orenburg gas processing and helium plants, while the raw materials of the Orenburg gas processing plant are natural gases of two oil and gas condensate deposits (Orenburg, hereinafter referred to as ONGKM, and Karachaganak, hereinafter referred to as ONGKM), significantly differing in their pose. The productivity of the processed raw materials is about 27 billion m ³ per year, of which 18 billion m ³ per year of ONGKM gas and 9 billion m ³ per year of KNGKM gas, according to these signs, this production refers to multi-tonnage. Both types of natural gas differ significantly in the content of impurities, in particular helium, hydrogen sulfide and carbon dioxide. The production flow chart includes sequentially amine cleaning units for the gas mixture of ONGKM and KNGKM from hydrogen sulfide and carbon dioxide, blocks for producing elemental sulfur in the Klaus process from hydrogen sulfide extracted from gases, and for producing elemental sulfur from it, separating deeply purified gas from impurities into parts, one of which after glycolic gas drying, it is additionally dried on gas adsorption drying blocks and fed to cryogenic separation blocks to obtain methane and ethane as final products, fractions of hydrocarbons With ₃ and above and helium. Another part of the gas, partially purified from carbon dioxide and deeply purified from hydrogen sulfide, is additionally processed on low-temperature oil absorption units to obtain dried fuel gas and fraction C ₃ and higher purified from hydrogen sulfide and mercaptans. Simultaneously with gas in production, stabilized commodity condensate, absorbent for oil absorption and a natural odorant are obtained from unstable condensate (SI Ivanov, “Development of the Orenburg Oil and Gas Condensate Field (ONGKM).” Environmental Protection in the Oil and Gas Complex, 2006, No. 7, p. 3-9).

The disadvantages of this production are:

- low helium extraction (80% of the potential) due to the forced use of ONGCM gas containing helium to dilute the CNGCM gas, in which there is no helium and contains a lot of carbon dioxide, to ensure the efficient production of sulfur by maintaining the necessary sulfur oxidation in the process Claus by reducing the proportion of carbon dioxide in sour gas;

- high losses of ethane, as well as propane, due to the processing of the second part of the gas at the low-temperature oil absorption unit, where ethane is not released, and propane is absorbed by the oil by no more than 50%, and also due to the forced use of up to 20% of the first part gas, which is supplied to the production of helium, to create the necessary cold when receiving helium. Because of this, ethane selection is not more than 40% of the potential, and propane is not more than 83% of the potential;

- low quality of drying in the process of low-temperature oil absorption - the dew point of the dried fuel gas is not lower than minus 15 ° C, which complicates its transportation to consumers in the winter due to the formation of crystalline hydrates and the need to use methanol;

- inefficient operation of the amine cleaning units of natural gases from hydrogen sulfide and carbon dioxide due to the need to extract these impurities at a close concentration in the feed (2.88% vol. hydrogen sulfide and 2.57% vol. carbon dioxide), which impedes the implementation of the selective process extracting these impurities and optimizing the operation of the mass transfer equipment of the unit;

- the low selectivity of the absorption oil with respect to hydrogen sulfide and mercaptans leads to an increased concentration of hydrogen sulfide and mercaptans in the fuel gas, respectively, up to 20 mg / m ³ and 36 mg / m ³ , which does not correspond to modern standards for fuel gas, respectively 7 mg / m ³ and 16 mg / m ³ ;

- low sulfur production efficiency due to the high content of carbon dioxide in acid gas, which is a brake on the effective extraction of sulfur from acid gas in the process of obtaining elemental sulfur by the Klaus method, including purification of tail gases, since the entire amount of carbon dioxide contained in the initial mixture of natural gases , enters into the composition of acid gas, with the exception of a small amount of carbon dioxide, which is not absorbed from the second part of the gas in the process of amine purification and low temperature first oil absorption and leaves the fuel gas;

- a narrow range of manufactured products.

When creating the invention, the task was to develop a highly efficient gas processing and gas-chemical complex of high capacity for processing natural hydrocarbon gases of one or several fields of the gas producing region with the development of the most diverse assortment of final fuel, gas-chemical and chemical commodity products while reducing environmental pollution by toxic components from natural gas processing. An increase in the capacity of the complex’s installations additionally leads to an increase in the efficiency of use of the enterprise’s fixed assets and a decrease in the need for scarce highly qualified personnel in areas with demographic deficiency.

The problem is solved due to the fact that in the gas processing and gas-chemical complex of large capacity for the processing of natural hydrocarbon gases and associated gas condensate from one or more fields, the optimal technological scheme of the complex with the relationship between the plants is formed, allowing to produce the following commercial products:

- commercial methane fraction (commercial gas);

- helium (gaseous and liquefied);

- liquefied methane;

- liquefied ethane;

- propane fraction;

- butane fraction;

- pentane-hexane fraction;

- car propane-butane;

- technical propane-butane;

- elemental sulfur technical;

- polyethylene;

- polypropylene;

- methanol;

ethanol;

- ethylene glycols;

- technical solvents;

and at the same time develop for the internal needs of the enterprise:

- hydrogen;

- oxygen;

- water vapor;

- gaseous and liquid fuels; -

Thus, the gas processing and gas-chemical complex consists of a gas processing sector, in which natural hydrocarbon gas is supplied as raw material for the preparation unit 1.1 to produce purified and dried gas and acid gas, which are sent respectively to the low-temperature fractionation unit 1.2 and to the production unit elemental sulfur in the presence of hydrogen sulfide in feedstock 1.5, a unit for producing a commodity methane fraction (commercial gas) 1.3 a methane fraction is supplied from unit 1.2 with receipt volume of nitrogen, helium concentrate directed to the production unit helium 1.6 link, and methane fraction, the liquefied hydrocarbon gas (LPG) production unit and the pentane-hexane fraction 1.4, BFLH is fed from the 1.2 unit to produce the propane, butane, isobutane and pentane-hexane fraction , propane-butane technical and automotive, natural gas liquefaction sector, consisting of liquefied methane fraction (commodity gas) 1.12, connected by the methane fraction stream from link 1.3, and liquefied ethane fraction OI 1.13, which is connected by the flow of the ethane fraction from unit 1.2 to produce marketable gas, a gas-chemical sector, in which, as the raw material for the ethylene 1.7 production unit, the ethane fraction from 1.2 is produced to produce ethylene and hydrogen, the propylene production unit 1.8 is fed from the 1.4 propane fraction, the unit for producing synthesis gas, methanol and higher alcohols, ammonia 1.10 is supplied from units 1.12, 1.1 and 1.7-1.8, respectively, commercial gas, acid gas and hydrogen to produce methanol and ammonia, the unit for producing polymers, copolymers 1.9 are supplied from units yew 1.8 and 1.7, respectively, propylene and partially ethylene to produce polyethylene, copolymer and polypropylene, ethylene glycol production unit 1.11 is fed from unit 1.7, the remaining part of ethylene to produce mono-, di- and triethylene glycols, condensate preparation sector, in which stabilization of the condensate 1.14, an unstable gas condensate is supplied, the engine fuel production unit 1.15 is supplied with a stable gas condensate, a pentane-hexane fraction and hydrogen, respectively, from the links 1.14, 1.4 and 1.7-1.8 to obtain a high-octane aut gasoline, kerosene and diesel fractions, with the bleed-limiting hydrocarbon gases from the unit 1.15 and a gas stabilization with link 1.14 forwarded to link 1.1, considering the fact that the movement of the process streams between adjacent sectors is provided by additional pumping stations, allowing evenly distribute the flow among the sectors.

At the same time, it is advisable that link 1.1 of the gas processing sector of the gas processing and gas-chemical complex includes a unit for producing gas enriched with helium by membrane extraction of a portion of helium or otherwise from the source of natural hydrocarbon gas, series-connected units for compounding natural hydrocarbon gases from at least one or several deposits in the feed stream, separation of the prepared mixture of hydrocarbon gases from the dropping liquid and mechanical applications it received from the feed gas pipeline complex, purification of hydrocarbon gases from impurities of acidic components contained in the feedstock, including carbon dioxide, hydrogen sulfide, drying of hydrocarbon gas, involving stabilization gas and saturated hydrocarbon gases from the gas condensate processing sector, and removal of mercury, and also a helium enriched gas storage park. This arrangement of unit 1.1 provides not only high-quality preparation of the feedstock with the removal of mechanical impurities, water, hydrogen sulfide, sulfur dioxide from it, but also the flexibility of the entire complex when the productivity and composition of individual feed streams of various deposits fluctuate. Thus, when the concentration of helium in the feed gas fluctuates, its evolution in subsequent links becomes more complicated, for example, even with a slight decrease in the concentration of helium in the feed, the efficiency of the turbine expanders at the stage of extraction of helium concentrate in unit 1.2 decreases sharply. To avoid this, unit 1.1 provides for the installation of a membrane extraction of a part of helium from a stream of initial natural hydrocarbon gas enriched with helium, followed by storage of the extracted helium in the tanks of the helium concentrate storage park. Helium concentrate from the storage park can, if necessary, be supplied to unit 1.2 with a decrease in the concentration of helium in the feedstock to stabilize the composition of the feed stream of unit 1.2 for helium.

It is also advisable to provide preliminary separation of hydrocarbon feedstock into individual hydrocarbon semi-finished products, so that the link 1.2

the gas processing sector of the gas processing and gas-chemical complex included a low-temperature fractionation unit for raw materials to produce a methane fraction depleted in ethane, an ethane fraction and a wide fraction of light hydrocarbons, and unit 1.3 included a unit for decontamination of a methane fraction depleted in ethane with the release of excess nitrogen and helium impurities in the form of helium concentrate, including its intermediate storage in tanks, and commercial methane fraction (commercial gas).

For further processing of hydrocarbon semi-finished products, it is envisaged that unit 1.4 of the gas processing sector of the gas processing and gas chemical complex includes a gas fractionation unit for a wide fraction of light hydrocarbons to produce LHG in the form of a propane and butane fraction or a propane, butane and isobutane fraction, or automobile propane-butane or a mixture of propane-butane technical as well as pentane-hexane fraction.

To protect the environment from hydrogen sulfide extracted from hydrocarbon gases during their purification in unit 1.1, the gas processing and gas-chemical complex of unit 1.5, which includes a Claus unit with the production of elemental sulfur by oxidation of the separated hydrogen sulfide, consisting of a thermal and catalytic reaction part, hydrogenation, is provided for in the gas processing sector sulfur dioxide, tail gas aftertreatment involving hydrogen from the gas chemical sector and sulfur degassing.

In order to flexibly provide the world market with high-purity helium of grades A and B, it is envisaged that link 1.6 of the gas processing sector of the gas processing and gas chemical complex should include series-connected fine purification of helium concentrate from impurities consisting of units of recuperative heat exchangers, catalytic removal of hydrogen and methane, oil purification and drying of helium, including compression of a helium concentrate to a high pressure exceeding the critical pressure nitrogen, or medium pressure, below the critical nitrogen pressure, nitrogen condensation and / or expansion of helium, including the use of a turboexpander, terminal adsorption purification of helium from microimpurities, including short-cycle adsorption, as well as intermediate storage of gaseous helium in tanks, and liquefaction of purified helium, consisting of sites for adsorption purification, compression, heat transfer and expansion of helium using at least several turbo-expanders.

For the chemical processing of hydrocarbon semi-finished products, it is envisaged that the gas-chemical sector of the gas processing and gas-chemical complex contains a unit 1.7, which includes units for the preparation of raw materials (ethane fraction) and its pyrolysis, compression and processing of pyrogas, gas fractionation and refrigeration cycles to produce ethylene and hydrogen, and unit 1.8, which includes installations for propane dehydrogenation, gas compression and processing, and gas fractionation to produce propylene and hydrogen, which are raw materials for an expanded assortment of final products, while the gas fractionation unit can be made uniform for units 1.7 and 1.8.

To expand the range of products and minimize the waste of the enterprise, it is advisable that the gas chemical sector of the gas processing and gas chemical complex contains units that process hydrocarbon semi-finished products, by-products of ethane pyrolysis and propane dehydrogenation processes, carbon dioxide, namely unit 1.9, which includes raw material preparation, polymerization and / or copolymerization, granulation of the polymer and / or copolymer, unit 1.10, which includes a synthesis gas production unit, The key to methanol production from synthesis gas containing carbon monoxide and hydrogen, consisting of methanol synthesis units, its

purification in a two-column distillation system, a plant for the production of ammonia from synthesis gas containing nitrogen and hydrogen, consisting of units for the synthesis of ammonia, its cooling and separation, unit 1.11, which includes a catalytic oxidation of ethylene to ethylene oxide and hydration of ethylene oxide to ethylene glycols with further their fractionation with the release of at least mono-, di- and triethylene glycols and other glycols.

It is advisable that the natural gas liquefaction (LNG) sector of the gas processing and gas chemical complex includes unit 1.12, which contains a compression unit for gas coming from unit 1.3, a cooling and heat exchange unit, a separation and metering unit for liquefied methane, and unit 1.13, which contains a compression unit gas coming from link 1.2, a cooling and heat exchange unit, a separation and metering unit for liquid ethane for transportation.

It is also advisable that the gas-condensate processing sector of the gas processing and gas-chemical complex contains a unit 1.14, which includes a series-connected installation of electric desalination and stabilization of a gas condensate to produce desalinated and dehydrated unstable gas condensate, a stable gas condensate and stabilization gas, and a link 1.15, which includes a condensation fractionation unit obtaining the light part of the gasoline fraction, which is mixed with a pentane-hexane fraction obtained from a gas fractionation unit for a wide fraction of light hydrocarbons, it undergoes catalytic isomerization to produce isomerizate - and the heavy part of the gasoline fraction, which undergoes hydrofining and reforming, followed by fractionation and hydroisomerization (dearomatization) to produce high-octane gasolines, and kerosene and diesel their subsequent hydrofining, depending on the sulfur content and the limiting hydrocarbon gases released during the catalysis cally transformations distillates used for hydrogen generation and as a raw material units 1.5 and 1.6.

It is also advisable that in the gas processing and gas-chemical complex technological installations were formed from the following equipment, which ensures the implementation of an efficient and economical technological process:

- the installation for producing gas enriched in helium by membrane extraction of a part of helium or in another way from the source of natural hydrocarbon gas consists of tanks, capacitors, membrane modules, pumps, reservoirs and a piping system connecting the apparatus of the unit to each other, and a gas storage park enriched with helium ;

- the installation of compounding natural hydrocarbon gases consists of a pressure equalization system for at least two hydrocarbon gas streams from different fields, gas metering units, diaphragm mixers, gas holders, intermediate tanks, if necessary, a compressor that provides the necessary pressure in the feed stream and a piping system linking the apparatus of the installation to each other;

- the installation of separation of the feed stream from the droplet liquid and mechanical impurities consists of packed separators with continuous breakdown devices for trapping the droplet liquid, sedimentation tanks for its separation into the aqueous and hydrocarbon phases, periodic filter systems for trapping mechanical impurities with the possibility of regeneration of the filter surface, unit measuring the gas flow rate and the piping system connecting the apparatuses of the installation with each other; while the separators are equipped with contact devices cross-flow type PETON;

- the installation for the purification of hydrocarbon gas from acidic components using an amine-type absorbent consists of absorption and desorption columns equipped with contact devices and ensuring the content of acidic components in the purified hydrocarbon gas no more than 5 ppm, recuperative heat exchangers, refrigerators, heaters, auxiliary tanks, pumps and piping a system that connects the apparatus of the installation with each other; while the hydrocarbon gas is purified either from hydrogen sulfide, or from carbon dioxide, or from their mixture, depending on the presence of these components in the feed, and the columns are equipped with PETON cross-type contact devices;

- the installation for the purification of hydrocarbon gas from water vapor using an adsorbent based on synthetic type A zeolites consists of at least three adsorbers, which operate alternately on the basis of a cyclogram, a valve system switching adsorbers, a furnace for heating a desorbing agent, recuperative heat exchangers, refrigerators, a moisture separator and a piping system that connects the apparatus of the installation with each other;

- a unit for the purification of hydrocarbon gas from mercury vapor using an adsorbent based on natural sulfur-containing minerals, for example: pyrite, pyrrhotite, pentlandite, sphalerite, galena, covelin, chalcosine, boronite, molybdenite, or the above natural minerals deposited on an inert carrier - consists of at least two adsorbers with periodic replacement of the adsorbent after saturation, a piping system that connects the apparatus of each other, and ensures the content of mercury vapor in the purified hydrocarbon gas not more than 2 ppb;

- installation of low-temperature fractionation of raw materials to obtain a methane fraction depleted in ethane, ethane fraction and a wide fraction of light hydrocarbons, consists of an own source of cold, including a turboexpander, and an external source of cold by evaporation of propane, series-connected distillation columns including a demethanizer, a low-temperature absorber of methane fraction ethane column, recuperative heat exchangers, separators, reboilers, refrigerators, intermediate tanks, pumps, syst m and pumparound piping system connecting devices inserted between them;

- the installation for decontamination of the methane fraction depleted in ethane consists of a block of refrigerating machines, a compressor, several cryogenic distillation columns connected in series, recuperative heat exchangers, reboilers, refrigerators, intermediate tanks, pumps, reservoirs and a piping system connecting the apparatuses of the installation to each other;

- a gas fractionation unit for a wide fraction of light hydrocarbons consists of several distillation columns, including a deprotanizer and a debutanizer, a deisobutanizer working under pressure and equipped with a reflux condenser and a reboiler, recuperative heat exchangers, refrigerators, intermediate tanks, pumps and a piping system that connects the unit's apparatuses to each other;

- the gas fractionation unit for a wide fraction of light hydrocarbons is supplemented with a mixing unit for the propane and butane fractions to produce commercial propane or commercial propane-butane;

- Klaus installation with the production of elemental sulfur by oxidation of the hydrogen sulfide separated, consists of reactors for thermal and catalytic oxidation of hydrogen sulfide, recuperative heat exchangers, heaters, refrigerators, liquid sulfur collectors, pumps, a sulfur degassing column, a tail gas aftertreatment unit, involving hydrogen released in the gas chemical sector consisting of a catalytic hydrogenation reactor, followed by oxidation of hydrogen sulfide or absorption or adsorption of hydrogen sulfide and piping aqueous system connecting devices inserted between them;

- installation of fine purification of helium concentrate from impurities, consisting of a recuperative heat exchanger assembly containing at least two switching heat exchangers, a catalytic hydrogen and methane purification unit containing a heat exchanger, a heater and a catalytic reactor, an oil and helium concentrate purification unit drying of helium concentrate containing air-cooling units, water cooler, dehumidifiers, compressors, filter, oil separator, dehumidifiers, heat exchangers, con the application of nitrogen containing nitrogen condensers, a site for adsorption purification of helium concentrate from microimpurities, consisting of adsorbers filled with activated carbon and equipped with filters for trapping carbon dust and / or filled with adsorbents and connected to the system of apparatuses corresponding to short-cycle adsorption, including a gas recycling unit regeneration, consisting of a compressor and a piping system that connects either to the nitrogen condensation unit of this unit, or to a methane decontamination unit a new fraction, and tanks for storing gaseous helium and a piping system that connects the apparatus of the installation with each other;

- the liquefied helium concentrate liquefaction plant consists of an adsorber, compressor, heat exchangers, turboexpander, tanks, reservoirs and a piping system connecting the apparatus of the unit to each other;

- the pyrolysis unit consists of at least one pyrolysis furnace, a quenching apparatus, a pyrogas washing column, a system of distillation columns for the extraction of ethylene, propylene, methane, hydrogen, recycle ethane and light and heavy fractions of hydrocarbons returned to the pyrolysis or used as commercial solvents or boiler fuel for the needs of the enterprise, recuperative heat exchangers, reboilers, refrigerators, intermediate tanks, compressors, a system for creating cold from an internal source with Menenius turboexpander and external sources, pumps and the piping system connecting devices inserted between them;

- production of propylene includes heat exchangers, furnaces, dehydrogenation reactors, tanks, a regeneration column, separators, refrigerators, a filter, pumps, a deethanizer, propylene separation columns, an adsorber, compressors, systems for creating cold from an internal source using a turboexpander and external sources, and a pipeline system connecting devices of installation among themselves;

- plants for the production of polymers, copolymers consist of multi-stage compressors, prepolymerizers, prepolymerizers, main polymerization, copolymerization reactors, high and low pressure separators, cyclones, heat exchangers, containers, extruders, pneumatic conveying systems and a piping system connecting the apparatuses of the installation to each other;

- the synthesis gas production unit consists of a heater, an adsorber, a synthesis reactor furnace and a piping system connecting the apparatuses of the installation to each other;

- a methanol synthesis installation from synthesis gas consists of heat exchangers, reactors, condensers, separators, a washing column, methanol cleaning consists of a tank, a washing column, stabilization and concentration columns equipped with reboilers, pumps, condensers, refrigerators, a collector and a piping system connecting apparatuses of installation among themselves;

- the ammonia production unit includes a synthesis column, a waste heat boiler, heat exchangers, refrigerators, evaporators, separators, compressors, condensers, collectors, absorbers, a distillation column, pumps and a piping system connecting the apparatuses of the installation to each other;

- the installation of catalytic oxidation of ethylene to ethylene oxide and hydration of ethylene oxide to ethylene glycols and further fractionation of ethylene glycols consists of a reactor, heat exchangers, a steam generator, a refrigerator, absorbers, compressors, a stripper, a stripping column, a distillation column, a pump, a condenser, a separator, a boiler and a piping system connecting devices of installation among themselves;

- liquefaction unit for commercial methane fraction - commercial gas includes separators, compressors, air coolers, heat exchangers and refrigerators, systems for creating cold from an internal source using a turboexpander and external sources, and a piping system connecting the apparatuses to each other;

- the unit for liquefying the ethane fraction includes separators, compressors, air-cooling units, heat exchangers and refrigerators, systems for creating cold from external sources and a piping system connecting the apparatuses to each other;

- the installation of electric desalination and dehydration of gas condensate and stabilization of gas condensate includes heat exchangers, aftercoolers, air coolers, stabilization column, furnace, tanks, pumps, separators, electric dehydrators, mixers and a piping system that connects the apparatus between each other;

- the plant for the production of motor fuels consists of distillation columns, separators, pumps, heating furnaces, tanks, air coolers, reactors, compressors, heat exchangers and refrigerators, and a piping system connecting the apparatus of the plant to each other.

It is also advisable that during the processing of natural hydrocarbon gases from several deposits, if they contain helium in one stream, they are combined and processed, while the gas processing sector, including serial and / or parallel units of technological plants designed to produce commercial products, 1.1-1.6, and in the absence of helium in other streams, they were combined and processed, while the gas processing sector included sequential and / or parallel technological units installations intended for the receipt of marketable products, 1.1-1.5.

The figure 1 presents a schematic illustration of a gas processing and gas-chemical complex, consisting of four sectors: gas-processing, gas-chemical, for the liquefaction of natural gases and for the processing of gas condensate, which contain the following units, assembly and units:

1.1 - preparation of raw materials;

1.2 - low temperature fractionation of raw materials;

1.3 - receipt of commercial methane fraction (commercial gas);

1.4 - obtaining the sum of liquefied petroleum gases (LPG) and pentane-hexane fraction;

1.5 - production of elemental sulfur in the presence of hydrogen sulfide in the feedstock;

1.6 - receipt of commodity helium;

1.7 - ethylene production;

1.8 - production of propylene;

1.9 - obtaining polymers, copolymers;

1.10 - production of synthesis gas, methanol and higher alcohols, ammonia;

1.11 - obtaining ethylene glycols;

1.12 - liquefaction of commercial methane fraction - commercial gas;

1.13 - liquefaction of the ethane fraction;

1.14 - stabilization of gas condensate;

1.15 - receipt of motor fuels;

100 - installation for the production of gas enriched in helium;

110 - setting compounding and measuring natural gas;

120 - separation unit;

130 - installation of cleaning from acidic components;

140 - installation for the purification of hydrocarbon gas from water and mercury vapor;

200 - installation of low-temperature fractionation;

300 - installation of decontamination of methane fraction and separation of helium concentrate;

400 - gas fractionation unit for a wide fraction of light hydrocarbons;

410 - mixing unit;

500 - installation of post-treatment of tail gases and degassing of sulfur;

510 - installation of Klaus;

600 - installation of liquefaction of helium concentrate;

610 - installation of fine purification of helium concentrate;

700 - installation for the preparation of raw materials;

710 - installation of pyrolysis;

720 - installation of compression and processing of pyrogas;

730, 820 - gas fractionation unit;

800 - installation for the production of propylene;

810 - installation of gas compression and processing;

900 - installation for the production of polyethylene;

910 - installation for producing a copolymer;

920 - polypropylene production unit;

1000 - synthesis gas production unit;

1010 - methanol synthesis unit;

1020 - methanol purification unit;

1030.1050 - installation for the production of ammonia;

1040 - cooling installation;

1100 - installation of catalytic oxidation of ethylene;

1110 - installation of hydration;

1120, 1500 - fractionation unit;

1200 - liquefied methane compression plant;

1210 - installation for cooling and heating liquefied methane;

1220 - installation of separation and measurement of liquefied methane;

1300 - installation of compression of the ethane fraction;

1310 - installation for cooling and heating the ethane fraction;

1320 - installation of separation and measurement of ethane fraction;

1400 - installation of electric desalination and dehydration of gas condensate;

1410 - installation of stabilization of gas condensate;

1510 - installation of catalytic isomerization;

1520 - installation of hydrofining, reforming, fractionation and hydroisomerization.

Natural hydrocarbon gas through line 1 enters the gas processing sector at unit 1.1, in which it is divided into two streams, the first stream sequentially enters through line 2 to the compounding and natural gas metering unit PO, through line 3 to the separation unit 120, along line 4 - to the installation for cleaning acidic components 130, and the second stream through line 9 is sent to the installation for the production of gas enriched in helium 100 by membrane extraction of a part of helium or by other means.

If the feedstock contains a significant amount of hydrogen sulfide, then acid gas is sent for processing via line 5 to unit 1.5, which consists of a thermal and catalytic reaction unit, hydrogenation of sulfur dioxide 510, after which it is sent via line 6 to the tail gas after-treatment unit, involving hydrogen discharged from the gas chemical sector (not shown in FIG. 1), and sulfur degassing 500, from which elemental sulfur is discharged from line 7. When a significant amount of carbon dioxide is contained in the feedstock, acid gas is discharged via line 8 to the synthesis gas production unit 1000, which is included in link 1.10 of the gas chemical sector. Natural gas after purification from acidic impurities through line 71 enters the unit for purifying hydrocarbon gas from water and mercury vapor 140, from which regeneration gas is discharged, part of which is returned via line 11 to the unit for purifying hydrocarbon gas from water and mercury vapor 140, and the remainder through line 12 is diverted from the gas processing sector to its own needs. Dried and mercury-free gas is combined with a stream discharged through line 10 from a gas production plant enriched with helium 100 by membrane extraction of a part of helium or by other means, and through line 13 it is sent to low-temperature fractionation 200, which is included in unit 1.2, where methane is produced ethane depleted fraction, ethane fraction and a wide fraction of light hydrocarbons. Ethane depleted methane fraction is sent via line 14 to the methane fraction de-nitration unit and the separation of helium concentrate 300, which is part of unit 1.3, whose products are nitrogen discharged from the unit via line 15, helium concentrate, which is sent via line 16 to the fine purification unit helium concentrate from impurities 610 of link 1.6, then through line 17 the stream of purified helium enters the liquefaction facility for helium concentrate 600, after which liquefied helium is discharged through line 18 from the gas processing sector but. The purified commercial methane fraction from the methane fraction de-nitration unit and the separation of helium concentrate 300 through line 19 is discharged to link 1.12 of the natural gas liquefaction sector to the liquefied methane compression unit 1200, the cooling and heating unit for liquefied methane 1210, the separation and measurement unit for liquefied methane 1220, then part of the liquefied methane is diverted from the natural gas liquefaction sector through line 20, and the remaining part is sent through line 21 to the synthesis gas production unit 1000 units 1.10 of the gas chemical plant torus.

The ethane fraction withdrawn from the low-temperature fractionation unit 200 is divided into two parts, one of which is sent via line 22 to the ethane fraction compression unit 1300, the ethane fraction cooling and heating unit 1310, the separation and measurement unit for the ethane fraction 1320 of unit 1.13, after which the liquefied ethane is discharged from the natural gas liquefaction sector via line 23, the other part of the ethane fraction through line 24 is sent to ethylene (link 1.7), namely to the raw material preparation unit 700, after which through line 2 5 is sent to a pyrolysis unit 710, the products of which are sent via line 26 to a compression unit and processing of pyrogas 720, along line 27 to a gas fractionation unit 730, including refrigeration cycles, while the products obtained are distributed as follows: one part of the extracted ethylene is sent to produce ethylene glycols ( link 1.11), namely, it passes through line 28 to the catalytic oxidation unit of ethylene 1100, where ethylene oxide is produced, then sent along line 29 to the hydration unit 1110, after which a swarm mixture of ethylene glycols along line 30 is sent to a fractionation unit 1120, the products of which are mono-, di- and triethylene glycols, discharged, respectively, along lines 31, 32 and 33, another part of the extracted ethylene via line 34 is discharged to a polyethylene 900 production unit or installation the production of copolymer 910 of link 1.9, from where polyethylene is removed from the gas chemical sector via line 36, and hydrogen is sent via line 35 either to a methanol synthesis unit 1010, or to a catalytic isomerization unit 1510, or to a hydro-unit gorazhivaniya, reforming, fractionation, hydroisomerization 1520, or a tail gas cleanup unit (the latter in FIG. 1 not shown).

The wide fraction of light hydrocarbons discharged from the low-temperature fractionation unit 200 through line 37 enters the gas fractionation unit of a wide fraction of light hydrocarbons 400, which is part of the gas processing sector 1.4. The propane fraction through line 38 is sent to the installation for producing propylene 800 in unit 1.8 of the gas chemical sector, then through line 40 to the installation of gas compression and processing 810, after which through line 41 to the gas fractionation unit 820, which includes refrigeration cycles, from which the hydrogen evolved through line 42 combined with hydrogen discharged through line 35, and propylene is discharged either through line 43 to the installation for producing polypropylene 920, or along line 45 to the installation for producing copolymer 910, while lines 44 and 46 are discharged from the gas chemical sector, ootvetstvenno, polypropylene and copolymer. Link 1.4 of the gas processing sector includes a 410 mixing unit, the feed of which is propane and butane fractions, discharged, respectively, on line 47 and 48. Products of the mixing unit: automotive propane and industrial propane-butane, are discharged from the gas processing sector, respectively, according to lines 49 and 50. 400 butane and isobutane fractions isolated on a gas fractionation unit of a wide fraction of light hydrocarbons 400 are also removed from the gas processing sector, respectively, along lines 51 and 52, and pentane-hexano the first fraction via line 53 is sent to the catalytic isomerization unit 1510, which is part of the 1.15 unit of the gas condensate processing sector.

Upon receipt of methanol, synthesis gas via line 54 transfers hydrogen to a methanol synthesis unit 1010, from where the extracted methanol via line 55 is sent to a methanol purification unit 1020, after which the purified methanol is removed from the gas chemical sector via line 56. When ammonia is produced, synthesis gas via line 57 is sent to the ammonia production unit 1030, then the synthesis products are sent via line 58 to the cooling unit 1040 and via line 59 are sent to the ammonia production unit 1050, which is discharged from the gas chemical sector via line 6 0.

Unstable gas condensate flows through line 61 to an electric desalting and dehydration unit for gas condensate 1400 of link 1.14, after which line 62 is dehydrated and desalted gas condensate is sent to a gas condensate stabilization unit 1410, from where stabilization gas is sent via line 63 to a hydrocarbon gas purification unit from water and mercury vapor 140 and stabilized gas condensate through line 64 to the fractionation unit 1500 of link 1.15, after which the light part of the gasoline fraction through line 65 is sent to the cat lytic isomerization 1510 isomerate obtained from the line 66 enters the installation hydroforming, reforming, fractionation and hydroisomerization 1520, which also receives via line 39 stream from the fractionation unit 1500 1.15. The selected products of link 1.15: high-octane gasoline, kerosene and diesel fractions, are diverted from the gas condensate processing sector, respectively, along lines 67, 68 and 69, and the saturated hydrocarbon gases along line 70 are combined with stabilization gases allocated to the gas condensate stabilization unit 1410, and fed to the installation for the purification of hydrocarbon gas from water and mercury vapor 140.

Example 1. As an example, specific data on the practical development of the claimed invention with the aim of creating a gas processing and gas-chemical complex based on natural gas from the Chayandinskoye field, which is a valuable product due to its component composition, are given.

From the above composition it follows that in the source gas in high concentrations there is helium, which is a strategic product necessary for the development of space rocket and atomic technologies, ethane, propane, butanes, which is a valuable raw material for the production of a whole range of polymers, oxygenates, and others.

For this natural gas composition of the Chayandinskoye field, it is advisable that the gas processing and gas-chemical complex include a gas processing sector consisting of gas preparation (link 1.1), low-temperature fractionation (link 1.2), de-nitration and separation of helium concentrate (link 1.3) and production of commercial helium (link 1.6 ), the natural gas processing sector with the production of liquefied methane (link 1.12) and liquefied ethane (link 1.13) and the gas chemical sector consisting of ethylene (link 1.7) with its production eduyuschey polymerization in 1.9 link with the development of commercial polyethylene, the propylene (unit 1.8) followed by its polymerization in a link with 1.9 generation commodity polypropylene.

The second option is also possible, in which the gas processing and gas chemical sectors included a gas processing sector consisting of gas preparation (link 1.1), low-temperature fractionation (link 1.2), de-nitriding and separation of helium concentrate (link 1.3) and production of commercial helium (link 1.6), sector natural gas processing with the production of liquefied methane (link 1.12) and liquefied ethane (link 1.13) and the gas condensate processing sector, including electric desalination and dehydration, stabilization (link 1.14), fractionated catalytic isomerization, hydrofining, reforming, fractionation and hydroisomerization (link 1.15).

Thus, Table 1 presents the material balance for natural gas processing of the Chayandinskoye field according to two options.

It is advisable to send the developed commercial products to the PRC, which is currently experiencing an acute need for such resources. In this regard, the gas processing and gas-chemical complex is geographically proposed to be located near the river to send commercial products (polyethylene and polypropylene), by water to China, and gases by sea.

Claims (46)

1. A gas processing and gas chemical complex, including a gas processing sector, in which natural hydrocarbon gas is supplied as a raw material preparation unit 1.1 to produce purified and dried gas and acid gas, which are sent respectively to a low-temperature fractionation unit of raw material 1.2 and to a unit for producing elemental sulfur in the presence of hydrogen sulfide in the feedstock 1.5, a unit for producing a commodity methane fraction (commercial gas) 1.3, a methane fraction is fed from a link 1.2 to produce nitrogen, helium gas about concentrate directed to the production unit helium 1.6 link, and methane fraction, the liquefied hydrocarbon gas (LPG) production unit and the pentane-hexane fraction 1.4, BFLH is supplied from the 1.2 unit to produce the propane, butane, isobutane and pentane-hexane fraction, propane- technical and automotive butane, the natural gas liquefaction sector, consisting of a liquefied methane fraction (commodity gas) link 1.12, which is connected by a methane fraction stream from link 1.3, and an ethane fraction liquefied link 1.13, connected I have a stream of ethane fraction from unit 1.2 to produce marketable gas, a gas-chemical sector, in which feed ethylene 1.7 is supplied from unit 1.2, an ethane fraction to produce ethylene and hydrogen, unit for producing propylene 1.8 is fed from unit 1.4 to the propane fraction, synthesis unit -gas, methanol and higher alcohols, ammonia 1.10 is supplied from units 1.12, 1.1 and 1.7-1.8, respectively, commercial gas, acid gas and hydrogen to produce methanol and ammonia, the unit for producing polymers, copolymers 1.9 is supplied from units 1.8 and 1.7, respectively propylene and partially ethylene to produce polyethylene, copolymer and polypropylene, ethylene glycol production unit 1.11 is fed from unit 1.7, the remaining part of ethylene to produce mono-, di- and triethylene glycols, condensate preparation sector, in which unstable feedstock is used as condensate stabilization unit 1.14 gas condensate, engine fuel production unit 1.15 a stable gas condensate, pentane-hexane fraction and hydrogen, respectively, are supplied from units 1.14, 1.4 and 1.7-1.8 to produce high-octane gasoline, kerosene diesel fractions, thus limiting the withdrawn hydrocarbon gases from gas and 1.15 level stabilization unit with 1.14 directed to 1.1 unit, given the fact that the movement of the process streams is provided between adjacent sectors additional pumping stations. 2. The gas processing and gas-chemical complex according to claim 1, in which unit 1.1 includes an installation for producing gas enriched with helium by membrane extraction of a part of helium or by other means from the source of natural hydrocarbon gas, series-connected installations for compounding natural hydrocarbon gases, at least with one or more deposits in the feed stream, separation of the prepared mixture of hydrocarbon gases from the dropping liquid and mechanical impurities entering the complex from the feed gas hydrogen gas, purification of hydrocarbon gases from impurities of acidic components contained in the feedstock, including carbon dioxide, hydrogen sulfide, drying of hydrocarbon gas, involving stabilization gas and saturated hydrocarbon gases from the gas condensate processing sector, and removal of mercury, as well as a gas storage park enriched helium. 3. The gas processing and gas chemical complex according to claim 1, wherein unit 1.2 includes a low-temperature fractionation unit for raw materials to produce a methane fraction depleted in ethane, an ethane fraction and a broad fraction of light hydrocarbons. 4. The gas processing and gas-chemical complex according to claim 1, wherein unit 1.3 includes a methane de-nitriding unit depleted in ethane with the release of excess nitrogen, helium impurity in the form of helium concentrate, including its intermediate storage in tanks, and commercial methane fraction (commercial gas). 5. The gas processing and gas-chemical complex according to claim 1, in which unit 1.4 includes a gas fractionation unit for a wide fraction of light hydrocarbons to produce LPG in the form of a propane and butane fraction or a propane, butane and isobutane fraction, or automobile propane or a technical propane-butane mixture as well as the pentane-hexane fraction. 6. The gas processing and gas-chemical complex according to claim 1, in which unit 1.5 includes a Klaus unit with the production of elemental sulfur by oxidation of the hydrogen sulfide isolated, consisting of a thermal and catalytic reaction part, sulfur dioxide hydrogenation, tail gas purification and sulfur degassing. 7. The gas processing and gas chemical complex according to claim 1, in which unit 1.6 includes series-connected units for fine purification of helium concentrate from impurities, consisting of units of recuperative heat exchangers, catalytic purification of hydrogen and methane, purification of oil and drying of helium, including compression of helium concentrate to high pressure exceeding the critical pressure of nitrogen, or medium pressure, below the critical pressure of nitrogen, condensation of nitrogen and / or expansion of helium, including the use of turbo-detan dera, terminal adsorption purification of helium from microimpurities, including short-cycle adsorption, as well as intermediate storage of helium gas in tanks, and a facility for liquefying purified helium, consisting of adsorption purification, compression, heat transfer, and expansion units of helium using at least several turbo expanders. 8. The gas processing and gas-chemical complex according to claim 1, wherein unit 1.7 includes units for the preparation of raw materials (ethane fraction) and its pyrolysis, compression and processing of pyrogas, gas fractionation and refrigeration cycles to produce ethylene and hydrogen. 9. The gas processing and gas chemical complex according to claim 1, wherein unit 1.8 includes units for propane dehydrogenation, gas compression and processing, and gas fractionation and refrigeration cycles to produce propylene and hydrogen. 10. Gas processing and gas-chemical complex according to claim 8 and 9, in which gas fractionation is performed as a single unit. 11. The gas processing and gas-chemical complex according to claim 1, in which unit 1.9 includes units for the preparation of raw materials, polymerization and / or copolymerization, granulation of the polymer and / or copolymer. 12. The gas processing and gas chemical complex according to claim 1, wherein unit 1.10 includes a synthesis gas production unit. 13. The gas processing and gas chemical complex according to claim 1, wherein unit 1.10 includes a methanol production unit from synthesis gas containing carbon monoxide and hydrogen, consisting of methanol synthesis units, and its purification in a two-column distillation system. 14. The gas processing and gas-chemical complex according to claim 1, wherein unit 1.10 includes an ammonia production unit from synthesis gas containing nitrogen and hydrogen, consisting of units for the synthesis of ammonia, its cooling and evolution. 15. The gas processing and gas chemical complex according to claim 1, in which unit 1.11 includes a catalytic oxidation of ethylene to ethylene oxide and hydration of ethylene oxide to ethylene glycols and their further fractionation with the release of at least mono-, di- and triethylene glycols and others. 16. The gas processing and gas-chemical complex according to claim 1, in which unit 1.12 includes a unit for compressing the commodity methane fraction coming from unit 1.3, a unit for cooling and heat transfer, a unit for separating and measuring liquefied methane. 17. The gas processing and gas chemical complex according to claim 1, wherein unit 1.13 includes a unit for compressing the ethane fraction coming from unit 1.2, a cooling and heat exchange unit, a separation and metering unit for liquefied ethane for transportation. 18. The gas processing and gas chemical complex according to claim 1, wherein unit 1.14 includes series-connected installations for electric desalination and dehydration and stabilization of gas condensate to produce desalinated and dehydrated unstable gas condensate, stable gas condensate and stabilization gas. 19. The gas processing and gas chemical complex according to claim 1, wherein unit 1.15 includes a stable gas condensate fractionation unit to obtain a light portion of the gasoline fraction, which, when mixed with a pentane-hexane fraction obtained from a gas fractionation unit of a wide fraction of light hydrocarbons, undergoes catalytic isomerization to obtain isomerizate, and the heavy part of the gasoline fraction, which is subjected to hydrofining and reforming, followed by fractionation and hydroisomerization (de aromatization) to produce high-octane gasolines, a kerosene and diesel fraction, followed by hydrofining, depending on the sulfur content, and saturated hydrocarbon gases released during the catalytic conversions of distillates used to produce hydrogen and as raw materials for units 1.5 and 1.6. 20. The gas processing and gas-chemical complex according to claim 2, wherein the installation for producing gas enriched with helium by membrane extraction of a part of helium or by other means from the source of natural hydrocarbon gas consists of tanks, capacitors, membrane modules, pumps, reservoirs and a piping system connecting apparatuses of installation between themselves, and a gas storage park enriched with helium. 21. The gas processing and gas chemical complex according to claim 2, wherein the natural hydrocarbon gas compounding unit consists of a pressure equalization system for the at least two hydrocarbon gas streams of various fields, gas flow metering units, diaphragm mixers, gas holders, intermediate tanks, if necessary, a compressor that ensures the creation of the necessary pressure in the feed stream, and a piping system connecting the apparatuses to each other. 22. The gas processing and gas-chemical complex according to claim 2, in which the separation of the feed stream from the droplet liquid and mechanical impurities consists of packed separators with continuous breakdown devices for trapping the droplet liquid, sedimentation tanks for its separation into the aqueous and hydrocarbon phases, periodic filter systems actions for trapping mechanical impurities with the possibility of regeneration of the filtering surface, gas metering unit and piping system connecting devices tanovki among themselves. 23. The gas processing and gas chemical complex according to claim 2, wherein the installation for purifying hydrocarbon gas from acidic components using an amine type absorbent consists of absorption and desorption columns equipped with contact devices and ensuring the content of acidic components in the purified hydrocarbon gas is not more than 5 ppm, recuperative heat exchangers, refrigerators, heaters, auxiliary tanks, pumps, and a piping system that connects the apparatus of the installation together. 24. The gas processing and gas chemical complex according to claim 23, wherein the hydrocarbon gas is purified from either hydrogen sulfide or carbon dioxide, or from a mixture thereof, depending on the presence of these components in the feed. 25. The gas processing and gas chemical complex according to claim 22 and 23, in which the columns and separators are equipped with PETON cross-type contact devices. 26. The gas processing and gas-chemical complex according to claim 2, wherein the installation for purifying hydrocarbon gas from water vapor using an adsorbent based on synthetic A type zeolites consists of at least three adsorbers operating alternately based on a cyclogram, a valve system switching adsorbers , furnaces for heating a desorbing agent, recuperative heat exchangers, refrigerators, a dehumidifier, and a piping system that connects the apparatus of the installation together. 27. The gas processing and gas chemical complex according to claim 2, wherein the installation for the purification of hydrocarbon gas from mercury vapor using an adsorbent based on natural sulfur-containing minerals, for example: pyrite, pyrrhotite, pentlandite, sphalerite, galena, covelin, chalcosine, bornite, molybdenite, or the above natural minerals, deposited on an inert carrier, consists of at least two adsorbers with periodic replacement of the adsorbent after it is saturated, a piping system that connects the apparatus of the installation with each other, provides the content of mercury vapor in the purified hydrocarbon gas is not more than 2 ppm. 28. The gas processing and gas-chemical complex according to claim 3, in which the installation of low-temperature fractionation of raw materials to produce a methane fraction, depleted in ethane, ethane fraction and a wide fraction of light hydrocarbons consists of its own source of cold, including a turboexpander, and an external source of cold by evaporation of propane, sequentially connected distillation columns including a demethanizer, a low-temperature absorber of a methane fraction, an ethane column, recuperative heat exchangers, separators, reboilers, refrigerators, intermediate tanks, pumps, circulating irrigation systems and a piping system that connects the apparatus of the installation with each other. 29. The gas processing and gas-chemical complex according to claim 4, in which the de-nitriding unit for the methane fraction depleted in ethane consists of a link of refrigeration machines, a compressor, several cryogenic distillation columns connected in series, recuperative heat exchangers, reboilers, refrigerators, intermediate tanks, pumps, tanks and a piping system that connects the apparatus of the installation among themselves. 30. The gas processing and gas-chemical complex according to claim 5, in which the gas fractionation unit for a wide fraction of light hydrocarbons consists of several distillation columns, including a depropanizer and debutanizer, a deisobutanizer working under pressure and equipped with a reflux condenser and a reboiler, recuperative heat exchangers, refrigerators, and intermediate tanks , pumps and piping system that connects the apparatus of the installation among themselves. 31. The gas processing and gas chemical complex according to claim 30, wherein the gas fractionation unit for a wide fraction of light hydrocarbons is supplemented with a mixing unit for propane and butane fractions to produce commercial propane or commercial propane. 32. The gas processing and gas-chemical complex according to claim 6, in which the Klaus installation with the production of elemental sulfur by oxidation of the separated hydrogen sulfide consists of reactors for thermal and catalytic oxidation of hydrogen sulfide, recuperative heat exchangers, heaters, refrigerators, liquid sulfur collectors, pumps, sulfur degassing columns, units post-treatment of tail gases, involving hydrogen released in the gas chemical sector, consisting of a catalytic hydrogenation reactor, followed by oxidation of hydrogen sulfide or absorption or adsorption of hydrogen sulfide and a piping system that connects the apparatus of the installation with each other. 33. The gas processing and gas-chemical complex according to claim 7, wherein the installation for fine purification of helium concentrate from impurities, consisting of a regenerative heat exchanger assembly, containing at least two switching heat exchangers, a catalytic purification unit for hydrogen and methane containing a heat exchanger, a heater and a catalytic reactor, a unit for cleaning helium concentrate from oil and drying of helium concentrate containing air-cooling apparatuses, a water cooler, dehumidifiers, a compress filters, oil separator, desiccants, heat exchangers, nitrogen condensation unit containing nitrogen condensers, adsorption purification of helium concentrate from microimpurities, consisting of adsorbers filled with activated carbon and equipped with filters for collecting coal dust and / or filled with adsorbents and connected at the outlet into a system of apparatuses corresponding to short-cycle adsorption, including a gas recycle unit for regeneration, consisting of a compressor and a piping system connecting either to the condensation unit ation nitrogen this setting, either ustanvokoy denitrification methane fraction, and storage tanks for helium gas and pipeline system connecting between an installation apparatus. 34. The gas processing and gas chemical complex according to claim 7, wherein the liquefied helium concentrate liquefaction plant consists of an adsorber, compressor, heat exchangers, turbine expanders, tanks, reservoirs, and a piping system connecting the apparatuses to each other. 35. The gas processing and gas chemical complex according to claim 8, wherein the pyrolysis unit consists of at least one pyrolysis furnace, a quenching apparatus, a pyrogas washing column, a system of distillation columns for the separation of ethylene, propylene, methane, hydrogen, recycle ethane and light and heavy hydrocarbon fractions returned to the pyrolysis or used as commercial solvents or boiler fuel for the needs of the enterprise, recuperative heat exchangers, reboilers, refrigerators, intermediate tanks, compressors, systems for creating cold from an internal source with the use of a turboexpander and external sources, pumps and a piping system that connects the apparatus of the unit to each other. 36. The gas processing and gas-chemical complex according to claim 9, in which the production of propylene includes heat exchangers, furnaces, dehydrogenation reactors, tanks, a regeneration column, separators, refrigerators, a filter, pumps, a deethanizer, propylene separation columns, an adsorber, compressors, and cooling systems from an internal source with the use of a turboexpander and external sources and a piping system connecting the apparatus of the installation with each other. 37. The gas processing and gas-chemical complex according to claim 11, wherein the polymers and copolymers production units consist of multistage compressors, prepolymers, prepolymers, main polymerization, copolymerization reactors, high and low pressure separators, cyclones, heat exchangers, containers, extruders, pneumatic conveying systems and a piping system that connects the apparatus of the installation among themselves. 38. The gas processing and gas chemical complex according to claim 12, wherein the synthesis gas production unit consists of a heater, an adsorber, a synthesis reactor furnace and a piping system connecting the apparatuses of the installation to each other. 39. The gas processing and gas chemical complex according to claim 13, wherein the methanol synthesis unit includes heat exchangers, reactors, condensers, separators, a wash column, methanol treatment includes tanks, a wash column, stabilization and concentration columns equipped with reboilers, pumps, condensers, refrigerators, collector and piping system that connects the apparatus of the installation among themselves. 40. The gas processing and gas chemical complex according to claim 14, wherein the ammonia production unit includes a synthesis column, a waste heat boiler, heat exchangers, refrigerators, evaporators, separators, compressors, condensers, collectors, absorbers, a distillation column, pumps and a piping system connecting devices installation among themselves. 41. The gas processing and gas chemical complex according to claim 15, wherein the installation of catalytic oxidation of ethylene to ethylene oxide and hydration of ethylene oxide to ethylene glycols and further fractionation of ethylene glycols consists of a reactor, heat exchangers, a steam generator, a refrigerator, absorbers, compressors, a stripper, a stripper, a distillation column columns, a pump, a condenser, a separator, a boiler and a piping system that connects the apparatus of the installation with each other. 42. The gas processing and gas-chemical complex according to claim 16, wherein the liquefying unit for the commercial methane fraction (commercial gas) includes separators, compressors, air coolers, heat exchangers and refrigerators, systems for creating cold from an internal source using a turboexpander and external sources and a pipeline system connecting devices of installation among themselves. 43. The gas processing and gas-chemical complex according to claim 17, in which the liquefaction of the ethane fraction includes separators, compressors, air coolers, heat exchangers and refrigerators, systems for creating cold from external sources, and a piping system connecting the apparatuses to each other. 44. The gas processing and gas-chemical complex according to claim 18, wherein the electric desalting and dewatering and stabilization of gas condensate installation includes heat exchangers, after-coolers, air cooling apparatuses, stabilization column, furnace, tanks, pumps, separators, electric dehydrators, mixers and a piping system connecting the apparatus between themselves. 45. The gas processing and gas chemical complex according to claim 19, wherein the 1.15 link for the production of motor fuels consists of distillation columns, separators, pumps, heating furnaces, tanks, air coolers, reactors, compressors, heat exchangers and refrigerators, and a piping system connecting the apparatus between themselves. 46. The gas processing and gas chemical complex according to claim 1, in which when processing natural hydrocarbon gases from several fields, if they contain helium in one stream, they are combined and processed, while the gas processing sector includes serial and / or parallel units of technological plants designed to receive commercial products, 1.1-1.6, and in the absence of helium in other streams, they are combined and processed, while the gas processing sector includes sequential and / or parallel links of technological plants designed to produce marketable products, 1.1-1.5.