EP3405553A1 - Methods and systems for superheating dilution steam and generating electricity - Google Patents
Methods and systems for superheating dilution steam and generating electricityInfo
- Publication number
- EP3405553A1 EP3405553A1 EP17704536.6A EP17704536A EP3405553A1 EP 3405553 A1 EP3405553 A1 EP 3405553A1 EP 17704536 A EP17704536 A EP 17704536A EP 3405553 A1 EP3405553 A1 EP 3405553A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- steam
- line
- flue gas
- coupled
- stream
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000010790 dilution Methods 0.000 title claims abstract description 59
- 239000012895 dilution Substances 0.000 title claims abstract description 59
- 238000000034 method Methods 0.000 title claims abstract description 50
- 230000005611 electricity Effects 0.000 title claims abstract description 18
- 238000004230 steam cracking Methods 0.000 claims abstract description 53
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 45
- 239000003546 flue gas Substances 0.000 claims abstract description 43
- 229930195733 hydrocarbon Natural products 0.000 claims abstract description 29
- 150000002430 hydrocarbons Chemical class 0.000 claims abstract description 29
- 239000000446 fuel Substances 0.000 claims abstract description 19
- 239000007789 gas Substances 0.000 claims description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- 238000010438 heat treatment Methods 0.000 claims description 16
- 239000003570 air Substances 0.000 claims description 14
- 238000010791 quenching Methods 0.000 claims description 11
- 239000003795 chemical substances by application Substances 0.000 claims description 9
- 230000003647 oxidation Effects 0.000 claims description 9
- 238000007254 oxidation reaction Methods 0.000 claims description 9
- 230000000171 quenching effect Effects 0.000 claims description 9
- 230000008016 vaporization Effects 0.000 claims description 6
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 4
- 239000005977 Ethylene Substances 0.000 claims description 4
- 239000012080 ambient air Substances 0.000 claims description 4
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 239000000047 product Substances 0.000 description 31
- 239000004215 Carbon black (E152) Substances 0.000 description 16
- 238000002485 combustion reaction Methods 0.000 description 8
- 239000007788 liquid Substances 0.000 description 7
- -1 diesel Substances 0.000 description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 238000004088 simulation Methods 0.000 description 6
- 150000001336 alkenes Chemical class 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 239000000567 combustion gas Substances 0.000 description 4
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 239000002737 fuel gas Substances 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000009835 boiling Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000009834 vaporization Methods 0.000 description 3
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- YNQLUTRBYVCPMQ-UHFFFAOYSA-N Ethylbenzene Chemical compound CCC1=CC=CC=C1 YNQLUTRBYVCPMQ-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 2
- 238000002309 gasification Methods 0.000 description 2
- 239000003502 gasoline Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000003209 petroleum derivative Substances 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 238000000197 pyrolysis Methods 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-Butene Chemical compound CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 229910001141 Ductile iron Inorganic materials 0.000 description 1
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 description 1
- 150000001345 alkine derivatives Chemical class 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000001273 butane Substances 0.000 description 1
- IAQRGUVFOMOMEM-UHFFFAOYSA-N butene Natural products CC=CC IAQRGUVFOMOMEM-UHFFFAOYSA-N 0.000 description 1
- WFYPICNXBKQZGB-UHFFFAOYSA-N butenyne Chemical group C=CC#C WFYPICNXBKQZGB-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- UBAZGMLMVVQSCD-UHFFFAOYSA-N carbon dioxide;molecular oxygen Chemical compound O=O.O=C=O UBAZGMLMVVQSCD-UHFFFAOYSA-N 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000011280 coal tar Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 150000001993 dienes Chemical class 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 description 1
- OFBQJSOFQDEBGM-UHFFFAOYSA-N n-pentane Natural products CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003498 natural gas condensate Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000003415 peat Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- JTJMJGYZQZDUJJ-UHFFFAOYSA-N phencyclidine Chemical class C1CCCCN1C1(C=2C=CC=CC=2)CCCCC1 JTJMJGYZQZDUJJ-UHFFFAOYSA-N 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- MWWATHDPGQKSAR-UHFFFAOYSA-N propyne Chemical group CC#C MWWATHDPGQKSAR-UHFFFAOYSA-N 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000004326 stimulated echo acquisition mode for imaging Methods 0.000 description 1
- 229930195735 unsaturated hydrocarbon Natural products 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
- 150000003738 xylenes Chemical class 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G9/00—Thermal non-catalytic cracking, in the absence of hydrogen, of hydrocarbon oils
- C10G9/34—Thermal non-catalytic cracking, in the absence of hydrogen, of hydrocarbon oils by direct contact with inert preheated fluids, e.g. with molten metals or salts
- C10G9/36—Thermal non-catalytic cracking, in the absence of hydrogen, of hydrocarbon oils by direct contact with inert preheated fluids, e.g. with molten metals or salts with heated gases or vapours
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22G—SUPERHEATING OF STEAM
- F22G1/00—Steam superheating characterised by heating method
- F22G1/16—Steam superheating characterised by heating method by using a separate heat source independent from heat supply of the steam boiler, e.g. by electricity, by auxiliary combustion of fuel oil
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G2300/00—Aspects relating to hydrocarbon processing covered by groups C10G1/00 - C10G99/00
- C10G2300/40—Characteristics of the process deviating from typical ways of processing
- C10G2300/4006—Temperature
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G2400/00—Products obtained by processes covered by groups C10G9/00 - C10G69/14
- C10G2400/20—C2-C4 olefins
Definitions
- the disclosed subject matter relates to methods and systems for superheating dilution steam and generating electricity.
- a hydrocarbon feedstock can be diluted with steam and thermally cracked to form lighter and/or unsaturated hydrocarbons.
- the presence of dilution steam can reduce coke formation.
- Dilution steam can also decrease the partial pressure of the hydrocarbons and thereby shift the reaction equilibrium to favor desired products and reduce byproduct formation.
- dilution steam can be used to vaporize the hydrocarbon feedstock, which can reduce fouling in certain downstream heaters and reactors.
- dilution steam can be used to vaporize the hydrocarbon feedstock, it can be desirable to provide high temperature dilution steam to promote complete vaporization.
- Certain methods of heating or superheating dilution steam are known in the art. For example, certain methods can heat dilution steam using coils or heat exchangers within the convection section of the steam cracking furnace. However, this method can be energy intensive and there is interest in developing efficient methods of generating superheated dilution steam.
- Electrical energy can be generated, e.g., using a gas turbine generator, by combusting fuel to produce flue gas to drive a turbine.
- Certain methods of generating steam while producing electrical energy are known in the art.
- U.S. Patent No. 5,647, 199 discloses a system for combined-cycle power generation in which each power generation unit includes a gas turbine that produces flue gas, a steam generator for producing high pressure steam from the flue gas, and a high pressure steam turbine for producing electricity from the high pressure steam.
- U.S. Patent No. 5,669,216 discloses a process including performing an endothermic reaction to produce fuel, and then combusting the fuel to drive a gas turbine to produce mechanical and/or electrical energy.
- the process can include generating steam using the flue gas from the gas turbine.
- International Patent Publication No. WO2015/128035 discloses integrating a gas turbine and a steam cracking furnace.
- the method can include indirectly quenching the product stream from the steam cracking furnace in a transfer line exchanger to produce a mixture of water and steam, separating the water and steam in a steam drum, and using the flue gas from the gas turbine to superheat the steam from the steam drum.
- the disclosed subject matter provides techniques for superheating dilution steam and generating electricity, including by integrating a steam cracking furnace and a gas turbine generator.
- an exemplary method of superheating dilution steam for use in a steam cracking furnace includes combusting fuel in the presence of compressed air to produce a flue gas and using the flue gas to drive a turbine to produce electricity.
- the method can further include superheating dilution steam using the flue gas, combining the dilution steam with a hydrocarbon feed stream to produce a mixed feed stream, and steam cracking the mixed feed stream to produce a product stream.
- the method can further include compressing ambient air for the combustion.
- the dilution steam can be superheated to a temperature from about 400°C to about 600°C.
- the feed stream can be heated prior to combining the dilution steam with the feed stream to produce a mixed feed stream.
- the method can further include flash vaporizing the mixed feed stream such that greater than about 70% of the hydrocarbons are vaporized prior to steam cracking the mixed feed stream.
- the mixed feed stream can be heated prior to steam cracking.
- the product stream can include ethylene.
- the method can further include quenching the product stream.
- the method can further include combusting fuel in the presence of an oxidation agent to heat the steam cracking furnace.
- the oxidation agent can be heated using the flue gas.
- the oxidation agent is ambient air. In other particular embodiments, the oxidation agent is the flue gas.
- an exemplary system includes a gas turbine generator for combusting air and fuel to produce electrical power and a flue gas stream.
- the system can further include a superheater, coupled to the gas turbine generator, for transferring heat from the flue gas stream to a dilution steam line.
- the system can further include a radiant coil within the steam cracking furnace, and a feed line, where the dilution steam line is combined with the feed line upstream from the radiant coil to form a mixed feed line, and where the mixed feed line is coupled to the radiant coil.
- the gas turbine generator can include a compressor for compressing air.
- the steam cracking furnace can include a radiant section and a convection section, and the radiant coil can be within the radiant section.
- the convection section of the fired heater can further include a feed preheater for heating the feed line and a mixed preheater for heating the mixed feed line.
- the convection section can further include a second mixed preheater for further heating the mixed feed line.
- the system can further include a product line, coupled to the radiant coil, for transferring the steam cracking products to a transfer line exchanger.
- the transfer line exchanger can be for quenching the steam cracking products by transferring heat to a water feed line to produce a steam line.
- the water feed line can be coupled to an economizer within the convection section of the steam cracking furnace.
- the steam line can be coupled to a superheater within the convection section of the steam cracking furnace.
- the water feed line can be coupled to both an economizer and a steam drum and the steam line can also be coupled to the steam drum for separating steam from the steam line.
- the steam from the steam line can be directed to a superheater within the convection section of the steam cracking furnace.
- FIG. 1 depicts a method of superheating dilution steam and generating electricity according to one exemplary embodiment of the disclosed subject matter.
- FIG. 2 depicts a system for superheating dilution steam and generating electricity according to one exemplary embodiment of the disclosed subject matter.
- FIG. 3 provides a graphical representation of the remaining liquid fraction in the feed stream after contact with dilution steam having temperatures from about 200°C to about 475°C, in accordance with an example embodiment of the disclosed subject matter.
- the presently disclosed subject matter provides techniques for superheating dilution steam and generating electricity, including by integrating a steam cracking furnace and a gas turbine generator.
- FIG. 1 is a schematic representation of a method according to a non-limiting embodiment of the disclosed subject matter.
- the method 100 includes combusting fuel in the presence of compressed air to produce a flue gas 101.
- the air can be ambient air.
- the fuel can be a suitable fuel for a combustion reaction in the presence of air, for example, the fuel can be a hydrocarbon mixture such as petroleum, gasoline, diesel, natural gas or a fuel gas, which can be produced as a byproduct from an ethylene plant.
- the fuel gas can contain hydrogen and methane.
- the fuel gas can be syngas, which contains carbon monoxide and hydrogen. The syngas can be produced by the gasification of coal or petroleum products.
- the flue gas can include oxygen, carbon dioxide, steam, and uncombusted fuel.
- the flue gas can contain from about 5% to about 18%, from about 10% to about 16%), or from about 13%> to about 15%> oxygen by volume.
- the flue gas can drive a turbine to generate mechanical work and/or electricity.
- the flue gas can have a temperature from about 300°C to about 800°C, from about 350°C to about 700°C, or from about 400°C to about 650°C.
- the temperature of the flue gas can be increased, e.g., using a duct burner.
- the temperature of the flue gas can be increased to about 850°C.
- the term “about” or “approximately” means within an acceptable error range for the particular value as determined by one of ordinary skill in the art, which will depend in part on how the value is measured or determined, i.e., the limitations of the measurement system. For example, “about” can mean a range of up to 20%, up to 10%>, up to 5%), and or up to 1%> of a given value.
- the method 100 can further include superheating dilution steam using the flue gas 102.
- heat can be transferred from the flue gas to the dilution steam, e.g., in a boiler or heat exchanger.
- the dilution steam can be superheated to temperatures ranging from about 250°C to about 750°C, from about 350°C to about 650°C, or from about 400°C to about 600°C.
- the flue gas can be cooled to a temperature from about 110°C to about 400°C, or from about 150°C to about 300°C.
- the cooled flue gas can be used to preheat the combustion gas used in the steam cracking furnace.
- the cooled flue gas can be used as a combustion gas in the steam cracking furnace.
- the cooled flue gas can be used to generate low pressure steam.
- the method 100 can further include combining the dilution steam with a feed stream including a hydrocarbon feedstock to produce a mixed feed stream 103.
- the hydrocarbon feedstock can include paraffins, olefins, naphthenes, and/or aromatics.
- the hydrocarbon feedstock can be light or heavy, i.e., can have a boiling point ranging from about 30°C to about 500°C.
- the feedstock can be a hydrocarbon stream that is rich in olefins, paraffins, isoparaffms, and/or naphthenes.
- the feedstock can further include up to about 30 wt-% aromatics.
- the feedstock can contain from about 0 wt-% to about 30 wt-% olefins and/or from about 0 wt-% to about 100 wt-% n- paraffins and/or from about 0 wt-% to about 100 wt-% isoparaffms and/or from about 0 wt-% to about 30 wt-%) aromatics.
- the hydrocarbon feedstock can originate from various sources, for example from natural gas condensates, petroleum distillates, coal tar distillates, peat and/or a renewable source.
- the hydrocarbon feedstock can include light naphtha, heavy naphtha, straight run naphtha, full range naphtha, delayed coker naphtha, gas condensates, coker fuel oil and/or gas oils, e.g., light coker gas oil and heavy coker gas oil.
- the hydrocarbon feedstock can include a hydrocarbon product from the synthesis of syngas, e.g., from Fischer Tropsch synthesis and/or the gasification of hydrocarbon material.
- the dilution steam can be combined with the feed stream in a certain steam to hydrocarbon weight ratio.
- the weight ratio of steam to hydrocarbons can be from about 0.1 : 1 to about 1 : 1.
- the ratio of steam to hydrocarbons is about 0.35: 1.
- the feed stream can be heated prior to combination with the dilution steam.
- the feed stream can be heated in the convection section of a steam cracking furnace.
- the feed stream can be heated to a temperature of about 100°C to about 200°C prior to combination with the dilution steam.
- the method 100 can further include flash vaporizing the mixed feed stream 104, i.e., the combination of the hydrocarbon feedstock and the dilution steam.
- Liquid in the mixed feed stream can be vaporized by contact with the superheated dilution steam. The extent of vaporization can depend in part on the temperature of the superheated dilution steam.
- FIG. 3 provides a graphical representation of the remaining liquid fraction after contact with dilution steam having temperatures from about 200°C to about 475°C.
- the mixed feed stream can be less than about 35%, less than about 25%, less than about 15%, less than about 10%, less than about 5%, less than about 3%), or less than about 1% liquid.
- greater than about 50%, greater than about 60%, greater than about 70%, or greater than about 80% of the hydrocarbons in the mixed feed stream are vaporized.
- the mixed stream is completely vaporized.
- the method can further include heating the mixed feed stream.
- the mixed feed stream can be heated to a temperature of about 500°C to about 700°C.
- the mixed feed stream can be further vaporized as it is heated.
- the method 100 can further include steam cracking the mixed feed stream to generate a product stream 105.
- the mixed feed stream can be steam cracked in the radiant section of a steam cracking furnace.
- the mixed feed stream can be steam cracked at a temperature from about 600°C to about 1000°C, from about 700°C to about 900°C, or from about 750°C to about 850°C.
- the product stream can include the steam cracking products.
- the product stream can include light olefins, e.g., ethylene.
- the product stream can further include other olefins, e.g., propylene and butene, paraffins, e.g., methane, ethane, propane, and butane, dienes, e.g., butadiene, and/or alkynes, e.g., acetylene, methylacetylene and vinylacetylene.
- the product stream can further include other components, for example, hydrogen, carbon monoxide, carbon dioxide, hydrogen sulfide, benzene, toluene, xylenes, ethylbenzene, styrene, pyrolysis gasoline, and/or pyrolysis fuel oil.
- other components for example, hydrogen, carbon monoxide, carbon dioxide, hydrogen sulfide, benzene, toluene, xylenes, ethylbenzene, styrene, pyrolysis gasoline, and/or pyrolysis fuel oil.
- the method 100 can further include quenching the product stream 106.
- the product stream can be quenched to cool the steam cracking products.
- the product stream can be cooled to a temperature of about 180°C to about 500°C.
- the product stream can be cooled by indirect heat transfer, e.g., by transferring heat from the product stream to another stream.
- heat can be transferred to a stream containing water, e.g., from a steam drum.
- the water can be preheated prior to quenching the product stream.
- the product stream can be cooled to a temperature of about 300°C to about 500°C by indirect heat transfer, and then subsequently cooled by direct oil quenching, e.g., to a temperature of about 200°C.
- FIG. 2 is a schematic representation of a system according to another non-limiting embodiment of the disclosed subject matter.
- the system 200 can include a gas turbine generator for combusting air and fuel to produce electrical power.
- the gas turbine generator can include a compressor 220, a combustion chamber 221, and a turbine 222.
- the compressor and turbine can be operated on a single shaft 223.
- a transfer line 201 can be coupled to the compressor for providing air to the compressor.
- One or more transfer lines 202 can be coupled to the combustion chamber for providing compressed air and fuel for combustion.
- the combustion can produce a flue gas, which can be used to drive the turbine.
- a transfer line 203 can transfer flue gas from the combustion chamber to the turbine.
- Coupled refers to the connection of a system component to another system component by any suitable means known in the art.
- the type of coupling used to connect two or more system components can depend on the scale and operability of the system.
- coupling of two or more components of a system can include one or more joints, valves, transfer lines or sealing elements.
- Non- limiting examples of transfer lines include pipes, hose, tubing, and ducting, which can be made of any suitable material, including stainless steel, carbon steel, cast iron, ductile iron, non-ferrous metals and alloys, for example including aluminum, copper, and/or nickel, and non-metallic materials, e.g., concrete and plastic.
- Non-limiting examples of joints include threaded joints, soldered joints, welded joints, compression joints and mechanical joints.
- fittings include coupling fittings, reducing coupling fittings, union fittings, tee fittings, cross fittings and flange fittings.
- valves include gate valves, globe valves, ball valves, butterfly valves and check valves.
- the system 200 can further include a superheater 230, coupled to the gas turbine generator, e.g., via a transfer line 204.
- a feed line 206 can also be coupled to the superheater for providing steam.
- the superheater can include one or more heat exchangers.
- the one or more heat exchangers can be any type suitable for heating gaseous or liquid streams.
- such heat exchangers include shell and tube heat exchangers, plate heat exchangers, plate and shell heat exchangers, adiabatic wheel heat exchangers, and plate fin heat exchangers.
- the transfer line 204 for transferring flue gas to the superheater can include one or more duct burners to provide additional heat to the flue gas.
- the system can further include a steam cracking furnace 240 coupled to the superheater 230, i.e., via a transfer line 207.
- An exhaust line 205 can be coupled to the superheater 230 for removing cooled flue gas from the superheater.
- the exhaust line can be coupled to a heat exchanger for heating combustion air, i.e., a combustion gas line coupled to the steam cracking furnace 240.
- the exhaust line is coupled to the steam cracking furnace and the flue gas is used as combustion gas in the steam cracking furnace.
- the steam cracking furnace 240 can include a radiant section and a convection section.
- the radiant section can include one or more burners 247, which may be within a firebox.
- the radiant section can include a radiant coil 246.
- the convection section can also include one or more coils 241, 242, 243, 244, 245.
- the coils can be made of any suitable material and have any suitable thickness for the transfer of heat from the furnace.
- the coils can also include extended surfaces, e.g., fins, to increase heat transfer.
- a feed line 208 can be coupled to the furnace for transferring hydrocarbons to the convection section.
- the feed line can be coupled to a feed preheater 241, i.e., a coil, for heating the hydrocarbons in the convection section.
- the feed line 208 can be combined with the transfer line 207 from the superheater 230 to form a mixed feed line 209 containing hydrocarbons and dilution steam.
- the mixed feed line 209 can be coupled to a mixed preheater 243, i.e., a coil, for heating the hydrocarbons and dilution steam.
- This preheater can be termed the "upper mixed preheater.”
- the mixed feed line can be coupled to a second mixed preheater 245, i.e., a coil, for further heating the hydrocarbons and dilution steam.
- This preheater can be termed the "lower mixed preheater.”
- the system 200 can further include a radiant coil 246 downstream from one or more preheaters 241, 243, 245.
- a product line 210 can be coupled to the radiant coil 246 for transferring the steam cracking products from the furnace 240.
- the product line 210 can be further coupled to a transfer line exchanger 250.
- the transfer line exchanger can be a heat exchanger, e.g., a shell and tube heat exchanger.
- the transfer line exchanger can be a Borsig transfer line exchanger, an Alstom exchanger, a Shaw quench system, or a KBR millisecond primary quench exchanger.
- the transfer line exchanger 250 can be coupled to a steam drum.
- a water feed line 212 can provide water to the steam drum.
- the water feed line can transfer steam and/or water from the transfer line exchanger 250.
- the water feed line can be coupled to an economizer 242 upstream from the transfer line exchanger.
- the economizer can be a coil within the convection section of the steam cracking furnace 240.
- the product line 210 and the water feed line 212 can exchange heat within the transfer line exchanger.
- a cooled product line 211 can remove cooled steam cracking products from the transfer line exchanger.
- a transfer line 213 can transfer the heated water (and steam, if any) to a superheater 244, i.e., a coil, within the convection section of the steam cracking furnace.
- Another transfer line 214 can transfer steam from the superheater 244 to the steam drum.
- the presently disclosed systems can further include additional components and accessories including, but not limited to, one or more gas exhaust lines, cyclones, product discharge lines, reaction zones, heating elements and one or more measurement accessories.
- the one or more measurement accessories can be any suitable measurement accessory known to one of ordinary skill in the art including, but not limited to, pH meters, flow monitors, pressure indicators, pressure transmitters, therm owells, temperature-indicating controllers, gas detectors, analyzers and viscometers.
- the components and accessories can be placed at various locations within the system.
- the methods and systems of the presently disclosed subject matter can provide advantages over certain existing technologies. Exemplary advantages include efficient superheating of dilution steam for steam cracking operations and generation of electricity.
- the gas turbine generator uses more fuel, it also produces electricity. If the additional fuel is attributed entirely to electricity generation, the electricity is generated with an efficiency between 60% and 80%.
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- Oil, Petroleum & Natural Gas (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
Description
Claims
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Application Number | Priority Date | Filing Date | Title |
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US201662280852P | 2016-01-20 | 2016-01-20 | |
PCT/IB2017/050113 WO2017125833A1 (en) | 2016-01-20 | 2017-01-10 | Methods and systems for superheating dilution steam and generating electricity |
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EP3405553A1 true EP3405553A1 (en) | 2018-11-28 |
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EP17704536.6A Pending EP3405553A1 (en) | 2016-01-20 | 2017-01-10 | Methods and systems for superheating dilution steam and generating electricity |
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US (1) | US20200024525A1 (en) |
EP (1) | EP3405553A1 (en) |
WO (1) | WO2017125833A1 (en) |
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CN114787322A (en) * | 2019-12-09 | 2022-07-22 | 酷布鲁克公司 | Heat integration in hydrocarbon processing facilities |
EP4103667A1 (en) | 2020-02-14 | 2022-12-21 | SABIC Global Technologies B.V. | Energy efficient steam cracking process |
WO2023183418A1 (en) * | 2022-03-22 | 2023-09-28 | Lummus Technology Llc | External combustion air preheat |
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DE2302440C2 (en) * | 1973-01-18 | 1982-09-16 | Linde Ag, 6200 Wiesbaden | Process for splitting hydrocarbons at high temperatures using process steam |
US4172857A (en) * | 1978-04-03 | 1979-10-30 | Arthur G. Mckee & Company | Process and apparatus for ethylene production |
DE3314132A1 (en) * | 1983-04-19 | 1984-10-25 | Linde Ag, 6200 Wiesbaden | METHOD FOR OPERATING A PLANT FOR HYDROCARBON FUSE |
US5669216A (en) | 1990-02-01 | 1997-09-23 | Mannesmann Aktiengesellschaft | Process and device for generating mechanical energy |
US5647199A (en) | 1995-09-12 | 1997-07-15 | General Electric Co. | Combined-cycle with multi-pressure reheat system |
FR2796078B1 (en) * | 1999-07-07 | 2002-06-14 | Bp Chemicals Snc | PROCESS AND DEVICE FOR VAPOCRACKING HYDROCARBONS |
US7097758B2 (en) * | 2002-07-03 | 2006-08-29 | Exxonmobil Chemical Patents Inc. | Converting mist flow to annular flow in thermal cracking application |
WO2009118697A2 (en) * | 2008-03-26 | 2009-10-01 | L'air Liquide-Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Cogeneration of hydrogen and power |
KR102387535B1 (en) * | 2014-02-25 | 2022-04-15 | 사우디 베이식 인더스트리즈 코포레이션 | A process for increasing process furnaces energy efficiency |
-
2017
- 2017-01-10 US US16/065,295 patent/US20200024525A1/en not_active Abandoned
- 2017-01-10 EP EP17704536.6A patent/EP3405553A1/en active Pending
- 2017-01-10 WO PCT/IB2017/050113 patent/WO2017125833A1/en active Application Filing
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WO2017125833A1 (en) | 2017-07-27 |
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