CN100386563C - Prying oil combustion supercritical pressure straight-flow steam boiler - Google Patents
Prying oil combustion supercritical pressure straight-flow steam boiler Download PDFInfo
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- CN100386563C CN100386563C CNB2006100429578A CN200610042957A CN100386563C CN 100386563 C CN100386563 C CN 100386563C CN B2006100429578 A CNB2006100429578 A CN B2006100429578A CN 200610042957 A CN200610042957 A CN 200610042957A CN 100386563 C CN100386563 C CN 100386563C
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- supercritical pressure
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Abstract
The invention includes a boiler body having radiation and convection heating surfaces. The radiation heating surface is a cylinder body coiled by a single radiation heating tube and the convection heating surface is a coiled tube bundle coiled by a single convection heating tube. One end of the radiation heating tube is used as a water inlet and the other end is in communication with a discharging tube of the radiation heating pipe. The discharging tube of the radiation heating tube is in communication with the convection heating tube. The boiler body is made up of three layers. The inlayer is a corrugated plate made of alumina silica refractory ceramic fibre by pressing, the middle layer is a insulation one and the other layer is an infrared-proof coating.
Description
Technical field
The invention belongs to oil field efficient thermal recovery system, particularly have the direct current cooker system of supercritical pressure and advanced person's handling technology of water supply.
Background technology
By thermodynamic analysis as can be known, for generating efficiency and the reduction cost of electricity-generating that improves thermal power plant, one of main method of employing is to improve the parameter (pressure, temperature etc.) of steam boiler (claiming steam generator again) outlet steam to improve its acting ability.The lot of domestic and foreign scholar just is being devoted to the research and the application of overcritical and ultra supercritical generation technology at present, corresponding therewith, up to the present all supercritical pressure steam boilers all are used for the thermal power plant, in its running, must solve problems such as salification in the interior working medium flow pulsation of its steam generator heat pipe, refrigerant heat transfer deterioration, the pipe, water quality and water treatment system.
In petroleum industry, the steam that steam boiler (injection boiler) is produced injects oil well to improve tar productivity, is one of crude oil thermal recovery method commonly used.Because the required outlet steam pressure excursion of this technology is big (from 6MPa to 20MPa), required outlet steam quality changes also greatly (from 50% to 100%) and needs skid and be convenient to transportation, so has only employing direct current cooker simple in structure could satisfy these requirements.
When pressure is 22.4MPa, when temperature was 374.15 ℃, water had reached supercriticality.With the water ratio under the normality, sudden change has taken place in physicochemical properties of supercritical water and heat and mass transfer performance.For steam generator, this sudden change is breakneck, and therefore, the design parameter of injection boiler is typically chosen under the critical condition of water.Present domestic notes vapour direct current cooker outlet pressure is subcritical pressure boiler, is up to about 21MPa, and Shang Weijian produces the report of supercritical pressure steam pouring furnace.
In recent years, along with the deep exploitation in the most of oil field of China, old liberated area piece water content increases, and oil production descends, and new light, middle matter crude oil and shallow layer thick oil block do not have new discovery, and the total output in oil field is downward trend year by year.With the Shengli Oil Field is example, though the somewhere has an appointment 1 * 10
8The explored heavy oil reserves of t, but because its buried depth surpasses 2000m, and formation pressure can't be exploited greater than 30MPa, also there is analogue in oil fields such as the Liaohe River, Xinjiang, Henan.
Summary of the invention
The objective of the invention is to overcome above-mentioned prior art deficiency, propose Prying oil combustion supercritical pressure straight-flow boiler furnace system, reliable, convenient transportation.
Technical scheme of the present invention is achieved in that Prying oil combustion supercritical pressure straight-flow boiler furnace system comprises boiler body, be divided into radiation heating-surface and convection heating surface in the boiler body, described radiation heating-surface is the cylinder that is coiled to form by single radiation heat pipe, convection heating surface is the snakelike convection bank that single convection current heat pipe is coiled to form, the convection bank fork is arranged and is put, one end of radiation heat pipe is as water inlet, the other end of radiation heat pipe is connected with radiation heat pipe outlet pipe, radiation heat pipe outlet pipe is connected with the convection current heat pipe, the furnace wall of boiler body constitutes by three layers, innermost layer is the corrugated plating that is pressed into by the alumina silicate refractory ceramic fibre, the intermediate layer is a heat insulation layer, and outermost layer is the anti-infrared dope layer.
Described convection heating surface is trapezoidal.
Radiation heat pipe and convection current heat pipe spatially are arranged vertically mutually.
The radiation heat pipe is fixed on the furnace wall by the spectacle suspension bracket, and the spectacle suspension bracket is arranged on the furnace wall.
Connect by push-and-pull shaping elbow between each straight length of radiation heating-surface and convection heating surface, push-and-pull shaping elbow adopts the bending radius of 0.75D.D is meant the straight tube caliber.
The radiation heat pipe adopts the 15CrMo alloy steel products.
The present invention arranges at the heating surface of supercritical pressure steam pouring furnace and has adopted radiation heating-surface and convection heating surface two stage arrangement that working medium and flow of flue gas direction totally are reverse flows.Be furnished with like this and be beneficial to the raising heat exchange, effectively reduce the classification of heating surface simultaneously, make boiler structure compactness, practicality, and the working medium side flow resistance is lower, reduced the energy consumption that overcomes resistance, improved the economy of system.Wherein, radiation heating-surface is totally cylindrical, compares with the rectangle burner hearth, and its symmetry improves, and have the following advantages: (1) can guarantee that furnace wall cooling is heated evenly, and prevents that thermal deviation from occurring; (2) can prevent the appearance in flue gas dead band, make that flowing of flue gas in the radiation heat affected zone is more smooth and easy, reduce flue gas resistance; (3) structural strength of cylindrical shape burner hearth, stability better more are adapted to frequent moving.Convection heating surface is a trapezium structure, constantly dwindles along its cross section of flue gas flow direction, and design has farthest guaranteed the cigarette speed that the flue gas stream of transversal flow convection bank is agreed on each cross section like this, makes the convection current heat pipe be heated evenly.
In order to reduce the radiation loss of furnace wall, improve the efficient of boiler, the present invention has adopted three layers of furnace wall structure, and this layout not only has the excellent insulating performance, and whole furnace wall is light suitable, convenient transportation and installation.
Straight length unification in the two-stage heating surface connects with push-and-pull shaping elbow, not only in limited space scale, arrange more heating surface, guaranteed the supercritical parameter of sender property outlet, and made the whole system body dimension reduce, save required steel greatly, reduced cost.The present invention's skid promptly when transporting and moving is applied to oil thermal recovery quickly and easily, need not to use large-sized power plants such as crane.
Description of drawings
Fig. 1 is a system schematic of the present invention.
Fig. 2 is furnace wall of the present invention and spectacle hanger structure schematic diagram.
Fig. 3 is the convection bank and the tube plate structure schematic diagram of convection heating surface of the present invention.
The specific embodiment
The present invention is described in further detail below in conjunction with accompanying drawing.
As shown in Figure 1, boiler body 3 is installed on the boiler foundation 8.Boiler body 3 mainly comprises radiation heating-surface 2 and convection heating surface 4 two-stage heating surfaces.Radiation heating-surface is positioned at burner hearth, is coiled to form by single radiation heat pipe 16.Coated by three layers of furnace wall in the boiler body 3, be followed successively by corrugated plating 14, heat insulation layer 13, anti-infrared dope layer 12 that the alumina silicate refractory ceramic fibre is pressed into from inside to outside.Burner 1 is installed in the furnace wall front wall, and is positioned on the center line of cylindrical shape burner hearth.Convection heating surface 4 is snakelike convection banks that single convection current heat pipe 17 is coiled to form, and convection current heat pipe 17 and radiation heat pipe 16 are connected by radiation heat pipe outlet pipe 18.At the afterbody of convection current heat pipe 17, arranged smokestack 7 and chimney 6, guaranteed the circulation of flue gas.
The flow process of working medium is: boiler feedwater is pressurizeed with high-pressure hydraulic pump after the strict processing of water treatment system, enter radiation heat pipe 16 by boiler feedwater water inlet 9, spraying into burner hearth after burner 1 atomizing of fuel oil by the front wall center arrangement burns rapidly, feedwater fully absorbs the radiant heat of fuel oil, enters convection current heat pipe 17 then.Working medium is the intrafascicular and abundant heat convection of high-temperature flue gas transversal flow convection tube 17 at snakelike convection current heat pipe, finally is heated as the high temperature and high pressure steam with supercritical parameter.Flue gas is discharged in the air through chimney 6 by smokestack 7 by working medium cooling back.
The cylinder that radiation heating-surface 2 is coiled to form for single tube, burner 1 front wall center arrangement wherein, the fuel oil after the atomizing directly sprays into burner hearth and rapidly burns.Convection heating surface is the snakelike convection bank that single tube is coiled to form, convection heating surface pipe two ends are inserted on the tube sheet 15, whole convection bank fork is arranged and is put, the flue gas flow area constantly dwindles along flue gas flow direction, make flue gas on the cross section of flowing through, obtain consistent flow velocity as far as possible, thereby obtain to wash away as far as possible uniformly the heat exchange effect.Heating power calculates and shows, through the two-stage heating surface, fluid properties can reach supercriticality, and (pressure is 26MPa, temperature is 390 ℃, exhaust gas temperature is 220 ℃, can not produce cold end corrosion and clogging phenomenon on back-end surfaces, according to the parameter of design, boiler efficiency can reach more than 85%.
Because radiation heating-surface and convection heating surface all are coiled to form by single tube, so the present invention has adopted push-and-pull shaping elbow 5 to be connected each straight length.Because the bending radius of push-and-pull shaping elbow is more much smaller than the radius that bending machine curved, so the layout of heating surface is tightr, can more effectively heat exchange in limited space.Use this technology, following two advantages are arranged: (1) dwindles the boiler body size significantly, convenient transportation not only, and can satisfy the needs that the oil field construction is frequently moved.(2) increased heating surface area in certain size, made the fractional cold of radiation heating-surface increase, the heat exchange of convection heating surface strengthens, and greatly reduces the steel consumption amount.
On the basis of taking all factors into consideration security and economy, the present invention adopts the steel of 15CrMo alloy steel products as the radiation heat pipe.15CrMo is homemade steel grade, can anti-550 ℃ of high temperature, not only satisfy the wall temperature requirement, and low price.
As shown in Figure 2, the pipe clamp to the fixedly employing of radiation heating-surface pipe is a spectacle suspension bracket 10 in the processing and manufacturing.Spectacle suspension bracket 10 fixing two adjacent water screen tubes pass furnace wall to spectacle suspension bracket 10 then and are fixed on boiler and protect on the frame 11.Arrange like this to make water screen tube, furnace wall and protect the frame one integrated mass that the boiler rigidity strengthens greatly.Outermost layer is that boiler protects frame 11, protects to be furnace wall in the frame, inwardly is followed successively by the corrugated plating 14 that anti-infrared coating 12, heat insulation layer 13, alumina silicate refractory ceramic fibre are pressed into.
In order to improve the thermal efficiency of boiler, outside burner hearth, coated furnace wall, make it with extraneous adiabatic, the furnace wall outside is the frame that protects of boiler, has supported whole heating surface.Because the weight of whole furnace wall is determined by internal layer, and the unit weight of innermost layer only is 250kg/m
3, be the water capacity heavy 1/4, therefore whole furnace wall is very light, and the alumina silicate refractory ceramic fibre of internal layer has good hear resistance, can anti-1250 ℃ high temperature.The intermediate layer is a heat insulation layer 13.In order further to strengthen the heat-insulating property of furnace wall, be coated with the very thin anti-infrared coating 12 of one deck again at the furnace wall outermost layer, it can more effectively prevent the infra-red radiation of furnace wall, improves boiler efficiency, but can not increase the weight of whole furnace wall.Be that channel-section steel protects frame and stirrup outside furnace wall, water screen tube is fixed on the steelframe by the spectacle suspension bracket.
As shown in Figure 3, convection current heat pipe 17 two ends are fixed on the tube sheet 15, the eyesight elbow of burn-oning in the tube sheet outside, and a girth joint, and adopted good adiabatic measure in the inboard, prevent that tube sheet from being burnt out by high-temperature flue gas.
In order to solve the salification problem in the heat pipe, the present invention has adopted the method for oxygen-eliminating device and novel trans permeable membrane separation equipment Combined Treatment in the processing of feedwater water quality.Adopt this scheme, the content of various salts all is lower than the solubility of various salts in the superheated steam in the feedwater, corresponding with the supercritical pressure and the temperature at outlet of steam boiler place, so can salification in the injection boiler heat pipe, and the salt in the feedwater will enter with steam and annotate in the vapour well.
Claims (6)
1. Prying oil combustion supercritical pressure straight-flow boiler furnace, comprise boiler body (3), it is characterized in that, be divided into radiation heating-surface (2) and convection heating surface (4) in the boiler body (3), described radiation heating-surface (2) is the cylinder that is coiled to form by single radiation heat pipe (16), convection heating surface (4) is the snakelike convection bank that single convection current heat pipe (17) is coiled to form, the convection bank fork is arranged and is put, one end of radiation heat pipe (16) is as water inlet (9), the other end of radiation heat pipe (16) is connected with radiation heat pipe outlet pipe (18), radiation heat pipe outlet pipe (18) is connected with convection current heat pipe (17), the furnace wall of boiler body (3) constitutes by three layers, innermost layer is the corrugated plating (14) that is pressed into by the alumina silicate refractory ceramic fibre, the intermediate layer is heat insulation layer (13), and outermost layer is anti-infrared dope layer (12).
2. Prying oil combustion supercritical pressure straight-flow boiler furnace according to claim 1 is characterized in that, convection heating surface (4) is a trapezium structure, and its cross section constantly dwindles along flue gas flow direction.
3. Prying oil combustion supercritical pressure straight-flow boiler furnace according to claim 1 is characterized in that, radiation heat pipe (16) and convection current heat pipe (17) spatially are arranged vertically mutually.
4. Prying oil combustion supercritical pressure straight-flow boiler furnace according to claim 1 is characterized in that, radiation heat pipe (16) is fixing by spectacle suspension bracket (10), and spectacle suspension bracket (10) passes the boiler that furnace wall is fixed on the furnace wall outside and protects on the frame.
5. Prying oil combustion supercritical pressure straight-flow boiler furnace according to claim 1, it is characterized in that, connect by push-and-pull shaping elbow (5) between each straight length of radiation heating-surface (2) and convection heating surface (4), push-and-pull shaping elbow (5) adopts the bending radius of 0.75D, and D is meant the straight tube caliber.
6. Prying oil combustion supercritical pressure straight-flow boiler furnace according to claim 1 is characterized in that, radiation heat pipe (16) adopts the 15CrMo alloy steel products.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100429578A CN100386563C (en) | 2006-06-09 | 2006-06-09 | Prying oil combustion supercritical pressure straight-flow steam boiler |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100429578A CN100386563C (en) | 2006-06-09 | 2006-06-09 | Prying oil combustion supercritical pressure straight-flow steam boiler |
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| Publication Number | Publication Date |
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| CN1888529A CN1888529A (en) | 2007-01-03 |
| CN100386563C true CN100386563C (en) | 2008-05-07 |
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| CNB2006100429578A Expired - Fee Related CN100386563C (en) | 2006-06-09 | 2006-06-09 | Prying oil combustion supercritical pressure straight-flow steam boiler |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101881435A (en) * | 2010-07-02 | 2010-11-10 | 西安交通大学 | Flue gas multi-return high-pressure and direct-current steam injection boiler body |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101144612B (en) * | 2007-10-09 | 2010-05-19 | 西安交通大学 | Skid-mounted type fuel oil supercritical pressure direct-flow gas injection boiler |
| CN102563837A (en) * | 2012-01-20 | 2012-07-11 | 中国石油天然气第八建设有限公司 | Gas-fired hot water boiler |
| CN103512190B (en) * | 2013-10-22 | 2016-05-18 | 张家港市江南锅炉压力容器有限公司 | A kind of skid-mounted type water filling boiler |
| CN105823209A (en) * | 2016-05-24 | 2016-08-03 | 梁世进 | Boiler with curved heated pipeline |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4476791A (en) * | 1983-05-25 | 1984-10-16 | John Zink Company | Hazardous waste steam generator |
| US4479355A (en) * | 1983-02-25 | 1984-10-30 | Exxon Research & Engineering Co. | Power plant integrating coal-fired steam boiler with air turbine |
| CN2052479U (en) * | 1989-01-27 | 1990-02-07 | 石行飞 | Horizontal boiler |
| US20040094100A1 (en) * | 2002-11-08 | 2004-05-20 | English John R. | Package water tuble boiler having two offset drums |
| JP3643676B2 (en) * | 1997-07-16 | 2005-04-27 | 三菱重工業株式会社 | Press injection method of boiler exhaust gas into oil field |
-
2006
- 2006-06-09 CN CNB2006100429578A patent/CN100386563C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4479355A (en) * | 1983-02-25 | 1984-10-30 | Exxon Research & Engineering Co. | Power plant integrating coal-fired steam boiler with air turbine |
| US4476791A (en) * | 1983-05-25 | 1984-10-16 | John Zink Company | Hazardous waste steam generator |
| CN2052479U (en) * | 1989-01-27 | 1990-02-07 | 石行飞 | Horizontal boiler |
| JP3643676B2 (en) * | 1997-07-16 | 2005-04-27 | 三菱重工業株式会社 | Press injection method of boiler exhaust gas into oil field |
| US20040094100A1 (en) * | 2002-11-08 | 2004-05-20 | English John R. | Package water tuble boiler having two offset drums |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101881435A (en) * | 2010-07-02 | 2010-11-10 | 西安交通大学 | Flue gas multi-return high-pressure and direct-current steam injection boiler body |
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| CN1888529A (en) | 2007-01-03 |
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Granted publication date: 20080507 Termination date: 20110609 |