CN103244939A - Superheated steam and subcritical pressure steam generator - Google Patents
Superheated steam and subcritical pressure steam generator Download PDFInfo
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- CN103244939A CN103244939A CN2013101696858A CN201310169685A CN103244939A CN 103244939 A CN103244939 A CN 103244939A CN 2013101696858 A CN2013101696858 A CN 2013101696858A CN 201310169685 A CN201310169685 A CN 201310169685A CN 103244939 A CN103244939 A CN 103244939A
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Abstract
The invention relates to a superheated steam and subcritical pressure steam generator which comprises a burner, a hearth, a connecting flue, a superheater, a convection steel pipe economizer, and a chimney. The components are sequentially communicated in a motion direction of hot smoke. The superheater is arranged above the connecting flue. The connecting flue is connected to the rear end of the hearth. The convection steel pipe economizer is arranged above the superheater. Each water-water heat exchanger is in a sleeve spiral reciprocating pipe structure which is disposed on the side of the outside of the hearth for heat exchange. Fed water enters a water feeding pump from a water inlet, is pressured by the water feeding pump, sequentially passes a water pipeline, the water-water heat exchanger, the convection steel pipe economizer, another water-water heat exchanger, a hearth tube bundle, a steam-water separator, the superheater and a steam outlet, and is heated gradually before superheated steam or saturated wet steam is discharged. The superheated steam and subcritical pressure steam generator special for oilfields is capable of generating both superheated steam and saturated wet steam under subcritical pressure operation conditions.
Description
Technical field
The present invention relates to the special equipment of the underground viscous crude of a kind of petroleum industry heating exploitation, specifically is the steam generator that produces saturated moist steam under the compatible subcritical pressure boiler service condition of produced superheated steam of a kind of oil field special use.
Background technology
The normally moist steam of the common steam generator of domestic and international application generation at present, its steam quality control is in 80%, and reason is to have adopted the only softening water treatment technology of desalination firmly and not of removing, and must keep at least 20% salinity, avoid fouling on the generator tube inwall, influence safe operation.
Along with deepening continuously of oil-field thick-oil exploitation, the growing needs of current thickened oil recovery new technology new technology can not have been satisfied with the method for annotating moist steam.The high round exploitation in the efficient exploitation of viscous crude and later stage mainly is to rely on the steam latent heat of vaporization crude oil of heating, so the water in the steam not only has no to help to production, can increase on the contrary and occupies the formation pore volume, and extraction liquid moisture content is risen, and heavy oil production reduces.
It is effective solution to the problems described above that employing is injected superheated steam in the oil well.Utilize superheated steam or the wet saturated steam of certain pressure to inject oil well, the viscous crude in the heating oil reservoir strengthens flowability to reduce its viscosity, thereby the effective exploitation of viscous crude is come out.
Summary of the invention
The purpose of this invention is to provide the compatible subcritical pressure boiler steam generator of a kind of superheated steam, it is the steam generator that produces saturated moist steam under the compatible subcritical pressure boiler service condition of produced superheated steam of a kind of oil field special use.Because of the borehole pressure difference of different oil wells, can realize moving under the various working of the present invention by the method for regulating the feed pump feed pressure, when oil well pressure was not more than 18MPa, steam generator produced superheated steam; And oil well pressure surpasses 18MPa and when not being higher than 21MPa, steam generator move the generation saturated vapor under saturation state.This equipment of use both can be produced superheated steam, the mass dryness fraction that also can produce under the subcritical pressure boiler is no more than 80% saturated moist steam, efficiently solve superheated steam generator and be combined the difficult problem of operation with the subcritical pressure boiler steam generator, satisfy the multi-functional demand of this equipment.
The objective of the invention is to be achieved by the following technical programs:
The compatible subcritical pressure boiler steam generator of a kind of superheated steam, it comprises: burner hearth, convection type steel tube economizer, superheater, water-water heat exchanger, steam-water separator, burner, feed pump, chimney, connection flue, water pipeline, burner hearth tube bank, the tube bank of convection type steel tube economizer, superheater bank, feed-water intake, steam (vapor) outlet; Burner, burner hearth, connection flue, superheater, convection type steel tube economizer, chimney are communicated with successively along hot smoke movement direction; Periphery in the burner hearth is provided with the burner hearth tube bank; Be provided with the tube bank of convection type steel tube economizer in the convection type steel tube economizer; Be provided with superheater bank in the superheater; Superheater is located at the top that connects flue, connects flue and connects the burner hearth rear end; The convection type steel tube economizer is located at the top of superheater, and water-water heat exchanger is the side that the structure of the snakelike reciprocation pipe of sleeve pipe form places the burner hearth outside, carries out heat exchange; Feedwater enters feed pump from feed-water intake, after the feed pump pressurization, pass through water pipeline, water-water heat exchanger, convection type steel tube economizer, water-water heat exchanger, burner hearth tube bank, steam-water separator, superheater successively to steam (vapor) outlet, progressively be heated intensification, output superheated steam or saturated moist steam.
Described burner hearth is horizontal straight flow structure, adopts the cylindrical steel shell body, and inwall is lined with aluminosilicate refractory fiber, and tail end is provided with the connection flue of square top and round bottom; The burner hearth tube bank back and forth is arranged in columnar structured for the single loop straight tube is snakelike; Optimum distance is 100mm between the pipe center line of burner hearth tube bank and furnace wall; The burner hearth tube bank forms a cover steam circulation along vertical snakelike the arranging of burner hearth body of wall inwall; Furnace outlet is communicated with steam (vapor) outlet and the drain that valve is set.The rectangular configuration that the superheater bank of described superheater back and forth is made up of single light pipe level is positioned at the high-temperature flue gas zone at furnace outlet place.The trapezium structure that the convection type steel tube economizer tube bank of described convection type steel tube economizer back and forth is made up of single finned tube level is positioned at the flue gas low-temperature zone.Described steam-water separator is a spherical container, in a plurality of independently cyclone separators are set, be provided with louver separator on cyclone separator top and steam outlet, be the secondary separation element.It also comprises: fuel gas inlet, fuel filler, oil heater, electric heater, and burner is communicated with fuel gas inlet and fuel filler; Fuel line is provided with oil heater and electric heater.It also comprises: air blast, air compressor machine, atomizing separator, switch board, feed pump sledge seat, switch board sledge seat, burner hearth sledge seat, connection flue and steam-water separator sledge seat; Armamentarium is divided into several modules, is assembled in respectively on several sledge seats with modular form, is connected and fixed with bolt between each module; Feed pump, air compressor machine are assembled on the feed pump sledge seat, switch board is assembled on the switch board sledge seat, burner hearth, air blast, atomizing separator, water-water heat exchanger are assembled on the burner hearth sledge seat, and connection flue, superheater, convection type steel tube economizer, chimney, steam-water separator are assembled in and connect on flue and the steam-water separator sledge seat; Burner hearth lies in a horizontal plane on the burner hearth sledge seat, connects the adjacent burner hearth of flue rear end, and superheater, convection type steel tube economizer, chimney are successively set on and connect flue top, are connected and fixed with bolt between each module.Regulate the feed pressure of feed pump, when pressure was not more than 18MPa, steam generator produced superheated steam; When pressure surpassed 18MPa and is not higher than 21MPa, steam generator moved under saturation state and produces saturated vapor.It also comprises switch board, and switch board is made up of programmable controller and touch-screen.Feedwater enters the cold water inlet of water-water heat exchanger through feed pump, flowed out by cooling water outlet, enter the tube bank of convection type steel tube economizer, hot water inlet by water-water heat exchanger enters by convection type steel tube economizer tube bank heated hot water, flowed out by hot water outlet, enter the burner hearth tube bank, cold water flows in the outer tube of sleeve pipe, and hot water flows in the inner layer pipe of sleeve pipe round about.
The present invention has following advantage and good effect:
1. the saturated moist steam process separation of forced circulation boiler generation after heat, is avoided dry saturated steam the heat affected zone and is analysed salt;
2. the dry saturated steam of the high degree of superheat is again with after isolated brackish water mixes by steam heater, obtains being still the steam of the high enthalpy of superheat state, greatly improved the heat energy utilization rate;
3. realize zero blowdown during superheat state;
4. Xian Jin control technology can realize that boiler flow and outlet temperature keep constant, the intelligent level height.
Heavy oil development adopts superheated steam to handle up after the technology, and output can increase by 3～8 times, and thick oil recovery ratio significantly improves.Simultaneously, when oil well pressure surpassed 18MPa and is not higher than 21MPa, evaporimeter still can continue operation generation saturated vapor under saturation state, realizes producing under the multi-state, and this is the not available characteristics of common superheated steam generator.
This equipment of use can make the client save the large number quipments purchase cost, also improve the utilization rate of notes well steam and the recovery ratio of viscous crude, reduce the operating cost of steam generator, adapt to current novel oil production technology both at home and abroad such as domestic and international oilfield horizontal well, steam flooding, SAGD to the requirements at the higher level of thermal recovery equipment.
Important technological parameters of the present invention:
Model: YZG23-18/375-D
Rated capacity: 23t/h
Operating pressure: 18MPa, 21MPa
Vapor (steam) temperature: 375 ℃, 370 ℃
The degree of superheat: 18 ℃ ,-
Steam quality :-,≤80%
Fuel: heavy oil, natural gas
Control mode: PLC+ touch-screen
Description of drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is that schematic diagram is looked on Fig. 1 of the present invention left side;
Fig. 3 is Fig. 1 schematic top plan view of the present invention;
Fig. 4 is Fig. 1 schematic rear view of the present invention;
Fig. 5 is workflow schematic diagram of the present invention;
Fig. 6 is burner hearth tube bank schematic diagram of the present invention;
Fig. 7 is that schematic diagram is looked on Fig. 6 burner hearth tube bank left side;
Fig. 8 is superheater bank schematic diagram of the present invention;
Fig. 9 is that schematic diagram is looked on Fig. 8 superheater bank left side;
Figure 10 is convection type steel tube economizer tube bank schematic diagram of the present invention;
Figure 11 is that schematic diagram is looked on Figure 10 convection type steel tube economizer tube bank left side;
Figure 12 is steam-water separator schematic diagram of the present invention;
Figure 13 is water-water heat exchanger schematic diagram of the present invention;
Figure 14 is louver separator schematic diagram in the steam-water separator of the present invention.
The specific embodiment
The present invention is further illustrated below in conjunction with accompanying drawing.
Drawing reference numeral is as follows among the figure: feed pump 1, switch board 2, burner 3, burner hearth 4, convection type steel tube economizer 5, superheater 6, connection flue 7, water-water heat exchanger 8, pipeline 9, steam-water separator 10, air channel 11, feed pump sledge seat 12, chimney 13, switch board sledge seat 14, air blast 15, coaster 16, ladder landing platform 17, air compressor machine 18, oil heater 19, electric heater 20, atomizing separator 21, burner hearth sledge seat 22, connection flue and steam-water separator sledge seat 23; Burner hearth tube bank 401, convection type steel tube economizer tube bank 501, superheater bank 601, feed-water intake 901, steam (vapor) outlet 902, natural gas import 903, sampling cooling water inlet 904, cold water inlet 801, cooling water outlet 802, the hot water inlet 803, hot water outlet 804, separator exterior tubing sewage draining exit 905, drain 906, separator sewage draining exit 907, backwash mouth 908, sampling coolant outlet 909, oil-in 910, oil return opening 911, hot water deoxygenation steam supply mouth 912, steam heating mouth 913, pump relief valve floss hole 914, dry saturated steam outlet 1001, saturation water outlet 1002, saturated vapor entrance 1003, louver separator 1004.
As shown in the figure: the compatible subcritical pressure boiler steam generator of a kind of superheated steam, it comprises: burner hearth 4, convection type steel tube economizer 5, superheater 6, water-water heat exchanger 8, steam-water separator 10, burner 3, feed pump 1, chimney 13, connection flue 7, water pipeline 9, burner hearth tube bank 401, convection type steel tube economizer tube bank 501, superheater bank 601, feed-water intake 901, steam (vapor) outlet 902; Burner 3, burner hearth 4, connection flue 7, superheater 6, convection type steel tube economizer 5, chimney 13 are communicated with successively along hot smoke movement direction; Periphery in the burner hearth 4 is provided with burner hearth tube bank 401; Be provided with convection type steel tube economizer tube bank 501 in the convection type steel tube economizer 5; Be provided with superheater bank 601 in the superheater 6; Superheater 6 is located at the top that connects flue 7, connects flue 7 and connects burner hearth 4 rear ends; Convection type steel tube economizer 5 is located at the top of superheater 6, and water-water heat exchanger 8 is the side that the structure of the snakelike reciprocation pipe of sleeve pipe form places burner hearth 4 outsides, carries out heat exchange; Water-water heat exchanger 8 is mainly used to improve the inlet temperature of economizer 5, makes inlet water temperature be higher than the dew-point temperature of flue gas, thereby avoids steam in the flue gas to condense at economizer 5 finned tubes and cause the cold end corrosion of pipe; Feedwater enters feed pump 1 from feed-water intake 901, after feed pump 1 pressurization, process water pipeline 9, water-water heat exchanger 8, convection type steel tube economizer 5, water-water heat exchanger 8, burner hearth tube bank 401, steam-water separator 10, superheater 6 are to steam (vapor) outlet 902 successively, progressively be heated intensification, output superheated steam or saturated moist steam.
Described burner hearth 4 is horizontal straight flow structure, adopts the cylindrical steel shell body, and inwall is lined with aluminosilicate refractory fiber, and tail end is provided with the connection flue 7 of square top and round bottom; Burner hearth tube bank 401 back and forth is arranged in columnar structured for the single loop straight tube is snakelike; Optimum distance is 100mm between the pipe center line of burner hearth tube bank 401 and furnace wall; Heat transfer, safe operation and the burner 3 maximum flames adjusting sizes of heating surface have been considered during design, make flame and burner hearth tube bank 401 not produce situations such as welt phenomenon, adopt optimum distance between burner hearth tube bank 401 and furnace wall, this determines according to directly absorbing radiant heat and reflected radiation heat; Burner hearth tube bank 401 forms a cover steam circulation along vertical snakelike the arranging of burner hearth body of wall inwall; Its thermal efficiency height, good heat radiation effect; Burner hearth 4 outlets are communicated with steam (vapor) outlet 902 and the drain 906 that valve is set.
The rectangular configuration that the superheater bank 601 of described superheater 6 back and forth is made up of single light pipe level is positioned at the high-temperature flue gas zone in burner hearth 4 exits; Its function is that dry saturated steam is continued heat temperature raising.
The trapezium structure that the convection type steel tube economizer tube bank 501 of described convection type steel tube economizer 5 back and forth is made up of single finned tube level is positioned at the flue gas low-temperature zone; Its function is that flue-gas temperature is further reduced, and improves the thermal efficiency.
Described steam-water separator 10 is spherical containers, in a plurality of independently cyclone separators are set, on cyclone separator top and steam outlet be provided with louver separator 1004, be the secondary separation element; The further fine liquid particles in the separate vapour, its separative efficiency has satisfied the requirement of superheater to steam quality up to more than 99%.
It also comprises: fuel gas inlet 903, fuel filler 910, oil heater 19, electric heater 20, and burner 3 is communicated with fuel gas inlet 903 and fuel filler 910; Fuel line is provided with oil heater 19 and electric heater 20.
It also comprises: air blast 15, air compressor machine 18, atomizing separator 21, switch board 2, feed pump sledge seat 12, switch board sledge seat 14, burner hearth sledge seat 22, connection flue and steam-water separator sledge seat 23; Armamentarium is divided into several modules, is assembled in respectively on several sledge seats with modular form, is connected and fixed with bolt between each module; Feed pump 1, air compressor machine 18 are assembled on the feed pump sledge seat 12, switch board 2 is assembled on the switch board sledge seat 14, burner hearth 4, air blast 15, atomizing separator 21, water-water heat exchanger 8 are assembled on the burner hearth sledge seat 22, and connection flue 7, superheater 6, convection type steel tube economizer 5, chimney 13, steam-water separator 10 are assembled in and connect on flue and the steam-water separator sledge seat 23; Burner hearth 4 lies in a horizontal plane on the burner hearth sledge seat 22, connects flue 7 adjacent burner hearths 4 rear ends, and superheater 6, convection type steel tube economizer 5, chimney 13 are successively set on and connect flue 7 tops, are connected and fixed with bolt between each module; So both dwindled body of heater length, made things convenient for the split transportation again, the field module assembling.
Because of the borehole pressure difference of different oil wells, can realize moving under the various working of the present invention by the method for regulating the feed pump feed pressure.Regulate the feed pressure of feed pump 1, when pressure was not more than 18MPa, steam generator produced superheated steam; When pressure surpassed 18MPa and is not higher than 21MPa, steam generator moved under saturation state and produces saturated vapor.
This steam generator is summarised as: five parts, i.e. burner hearth 4, water-water-to-water heat exchanger 8, superheater 6, convection type steel tube economizer 5, steam-water separator 10; Three systems, i.e. water-steam systems; Combustion system, robot control system(RCS); Combustion system comprises again: burner 3, fuel line, burning line.
Described water-steam system: refer to the vapor channel between 902 from feed-water intake 901 to steam (vapor) outlet, by burner hearth tube bank 401, convection type steel tube economizer tube bank 501, superheater bank 601, steam-water separator 10 with and the flow system formed of scope interior conduit 9, shown in Figure 5 as flow process, be the main pressurized assembly of generator.Feedwater enters the cold water inlet 801 of water-water heat exchanger 8 through feed pump 1, flowed out by cooling water outlet 802, enter convection type steel tube economizer tube bank 501, restraining 501 heated hot water by the convection type steel tube economizer is entered by the hot water inlet 803 of water-water heat exchanger 8, flowed out by hot water outlet 804, enter burner hearth tube bank 401, cold water flows in the outer tube of sleeve pipe, and hot water flows in the inner layer pipe of sleeve pipe round about.
Described combustion system: formed by burner 3, burner hearth 4, connection flue 7, chimney 13 etc.Connect flue 7 and be provided with the warm galvanic couple of cigarette.
Described robot control system(RCS): comprise switch board 2, formed by programmable controller and touch-screen.
Claims (10)
1. the compatible subcritical pressure boiler steam generator of a superheated steam, it comprises: burner hearth (4), convection type steel tube economizer (5), superheater (6), water-water heat exchanger (8), steam-water separator (10), burner (3), feed pump (1), chimney (13), connect flue (7), water pipeline (9), burner hearth tube bank (401), the tube bank of convection type steel tube economizer (501), superheater bank (601), feed-water intake (901), steam (vapor) outlet (902); It is characterized in that: burner (3), burner hearth (4), connection flue (7), superheater (6), convection type steel tube economizer (5), chimney (13) are communicated with successively along hot smoke movement direction; Periphery in the burner hearth (4) is provided with burner hearth tube bank (401); Be provided with convection type steel tube economizer tube bank (501) in the convection type steel tube economizer (5); Be provided with superheater bank (601) in the superheater (6); Superheater (6) is located at the top that connects flue (7), connects flue (7) and connects burner hearth (4) rear end; Convection type steel tube economizer (5) is located at the top of superheater (6), and water-water heat exchanger (8) carries out heat exchange for the structure of the snakelike reciprocation pipe of sleeve pipe form places the outside side of burner hearth (4); Feedwater enters feed pump (1) from feed-water intake (901), after feed pump (1) pressurization, pass through water pipeline (9), water-water heat exchanger (8), convection type steel tube economizer (5), water-water heat exchanger (8), burner hearth tube bank (401), steam-water separator (10), superheater (6) successively to steam (vapor) outlet (902), progressively be heated intensification, output superheated steam or saturated moist steam.
2. the compatible subcritical pressure boiler steam generator of superheated steam according to claim 1, it is characterized in that: described burner hearth (4) is horizontal straight flow structure, adopt the cylindrical steel shell body, inwall is lined with aluminosilicate refractory fiber, and tail end is provided with the connection flue (7) of square top and round bottom; Burner hearth tube bank (401) back and forth is arranged in columnar structured for the single loop straight tube is snakelike; Optimum distance is 100mm between the pipe center line of burner hearth tube bank (401) and furnace wall; Burner hearth tube bank (401) forms a cover steam circulation along vertical snakelike the arranging of burner hearth body of wall inwall; Burner hearth (4) outlet is communicated with steam (vapor) outlet (902) and the drain (906) that valve is set.
3. the compatible subcritical pressure boiler steam generator of superheated steam according to claim 1, it is characterized in that: the rectangular configuration that the superheater bank (601) of described superheater (6) back and forth is made up of single light pipe level is positioned at the high-temperature flue gas zone in burner hearth (4) exit.
4. the compatible subcritical pressure boiler steam generator of superheated steam according to claim 1, it is characterized in that: the trapezium structure that the convection type steel tube economizer tube bank (501) of described convection type steel tube economizer (5) back and forth is made up of single finned tube level is positioned at the flue gas low-temperature zone.
5. the compatible subcritical pressure boiler steam generator of superheated steam according to claim 1, it is characterized in that: described steam-water separator (10) is a spherical container, in a plurality of independently cyclone separators are set, on cyclone separator top and steam outlet be provided with louver separator (1004), be the secondary separation element.
6. the compatible subcritical pressure boiler steam generator of superheated steam according to claim 1, it is characterized in that: it also comprises: fuel gas inlet (903), fuel filler (910), oil heater (19), electric heater (20), and burner (3) is communicated with fuel gas inlet (903) and fuel filler (910); Fuel line is provided with oil heater (19) and electric heater (20).
7. the compatible subcritical pressure boiler steam generator of superheated steam according to claim 1, it is characterized in that: it also comprises: air blast (15), air compressor machine (18), atomizing separator (21), switch board (2), feed pump sledge seat (12), switch board sledge seat (14), burner hearth sledge seat (22), connect flue and steam-water separator sledge seat (23); Armamentarium is divided into several modules, is assembled in respectively on several sledge seats with modular form, is connected and fixed with bolt between each module; Feed pump (1), air compressor machine (18) are assembled on the feed pump sledge seat (12), switch board (2) is assembled on the switch board sledge seat (14), burner hearth (4), air blast (15), atomizing separator (21), water-water heat exchanger (8) are assembled on the burner hearth sledge seat (22), and connection flue (7), superheater (6), convection type steel tube economizer (5), chimney (13), steam-water separator (10) are assembled in and connect on flue and the steam-water separator sledge seat (23); Burner hearth (4) lies in a horizontal plane on the burner hearth sledge seat (22), connect the adjacent burner hearth of flue (7) (4) rear end, superheater (6), convection type steel tube economizer (5), chimney (13) are successively set on and connect flue (7) top, are connected and fixed with bolt between each module.
8. the compatible subcritical pressure boiler steam generator of superheated steam according to claim 1, it is characterized in that: regulate the feed pressure of feed pump (1), when pressure was not more than 18MPa, steam generator produced superheated steam; When pressure surpassed 18MPa and is not higher than 21MPa, steam generator moved under saturation state and produces saturated vapor.
9. the compatible subcritical pressure boiler steam generator of superheated steam according to claim 1, it is characterized in that: it also comprises switch board (2), switch board (2) is made up of programmable controller and touch-screen.
10. vehicular ultra supercritical pressure saturated hot-water generator according to claim 1, it is characterized in that: feedwater enters the cold water inlet (801) of water-water heat exchanger (8) through feed pump (1), flowed out by cooling water outlet (802), enter convection type steel tube economizer tube bank (501), hot water inlet (803) by water-water heat exchanger (8) enters by convection type steel tube economizer tube bank (501) heated hot water, flowed out by hot water outlet (804), enter burner hearth tube bank (401), cold water flows in the outer tube of sleeve pipe, and hot water flows in the inner layer pipe of sleeve pipe round about.
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| CN201310169685.8A CN103244939B (en) | 2013-05-06 | 2013-05-06 | Superheated steam and subcritical pressure steam generator |
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| CN201310169685.8A CN103244939B (en) | 2013-05-06 | 2013-05-06 | Superheated steam and subcritical pressure steam generator |
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| CN103244939B CN103244939B (en) | 2015-07-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106524104A (en) * | 2016-11-25 | 2017-03-22 | 中国石油天然气第八建设有限公司 | Furnace hearth split large-tonnage fixed type superheated steam generator |
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| GB377096A (en) * | 1932-01-08 | 1932-07-21 | Babcock & Wilcox Ltd | Improvements in steam generating systems |
| JPH08285204A (en) * | 1995-04-17 | 1996-11-01 | Toshiba Eng Co Ltd | Forced circulation type electric heating water tube boiler |
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| CN106524104A (en) * | 2016-11-25 | 2017-03-22 | 中国石油天然气第八建设有限公司 | Furnace hearth split large-tonnage fixed type superheated steam generator |
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| CN103244939B (en) | 2015-07-08 |
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