CN101893230A - Horizontal boiler radiation segment structure - Google Patents
Horizontal boiler radiation segment structure Download PDFInfo
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- CN101893230A CN101893230A CN 201010216399 CN201010216399A CN101893230A CN 101893230 A CN101893230 A CN 101893230A CN 201010216399 CN201010216399 CN 201010216399 CN 201010216399 A CN201010216399 A CN 201010216399A CN 101893230 A CN101893230 A CN 101893230A
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Abstract
The invention relates to the field of boiler design and manufacturing and discloses a horizontal boiler radiation segment structure which is applicable to oil field steam injection boilers. The horizontal boiler radiation segment structure comprises an outer protective layer, wherein a member wall with a square section is arranged in the outer protective layer and comprises a plurality of boiler tubes connected in a coiled way and a closing plate connected between the boiler tubes. The horizontal boiler radiation segment structure is characterized in that: the closing plate between an outlet boiler tube and an inlet boiler tube of the boiler tubes comprises two connection plates with free edges and fixed edges; and the fixed edges of the two connection plates are connected with the outlet boiler tube and the inlet boiler tube, while the free edges are interlaced mutually.
Description
Technical field
The present invention relates to boiler design and make the field, particularly a kind of horizontal boiler radiation segment structure is applicable to uphole steam generator.
Background technology
At present, uphole steam generator commonly used is horizontal, and its radiant section is generally horizontal cylindric.In uphole steam generator, in order to improve the tonnage of boiler, effectively utilize the boiler space, a kind of method of employing is to change cylindric radiant section into square-section; In order effectively to improve the thermal efficiency of boiler, adopt membrane wall, can effectively reduce owing to heat radiation causes radiation loss to the heat-insulation layer between the boiler tube.
For the radiant section of square-section, the existence in flue gas dead band can be arranged at Si Jiaochu, make that the boiler tube at four jiaos of places is inhomogeneous owing to being heated, the boiler tube stress that causes has big difference, and makes to tear because of the line expansion is different between the boiler tube, damages boiler tube.Especially between the inlet boiler tube of radiant section and outlet boiler tube, may make that the connecting plate between these two boiler tubes is torn owing to stress is excessive, damage the inlet boiler tube and export boiler tube, have major safety risks owing to the wall temperature excessive temperature differentials.
Summary of the invention
At the deficiencies in the prior art, the object of the present invention is to provide a kind of horizontal boiler radiation segment structure, the heating surface that can solve because of radiant section has the defective that irregular expansion structure damages, especially the defective that the membrane wall between can preventing the inlet boiler tube of radiant section and exporting between the boiler tube is torn owing to stress is excessive is eliminated this type of major safety risks.
For achieving the above object, the present invention is achieved by the following technical solutions.
A kind of horizontal boiler radiation segment structure, comprise outer jacket, being provided with the cross section in the outer jacket is square membrane wall, described membrane wall comprises many boiler tubes of snakelike connection and is connected closure plate between the boiler tube, it is characterized in that the closure plate between outlet boiler tube in the described boiler tube and the inlet boiler tube is two connecting plates with free margins and fixed edge; The fixed edge of described two connecting plates connects outlet boiler tube and inlet boiler tube respectively, and free margins is interlaced.
Further improvement of the present invention and characteristics are:
(1) free margins of described two connecting plates is the hook-shaped of empty button.
(2) in described two connecting plates, the free margins of one of them connecting plate is the meander-like with outer opening, and the free margins of another connecting plate stretches in the described outer opening.
(3) described outlet boiler tube and inlet boiler tube are positioned at the upper left side or the upper right side of membrane wall.
(4) radical of described boiler tube is an odd number.
(5) transition is tilted to connect by closure plate by the right angle portion of described membrane wall.
(6) boiler tube in gas-liquid two-phase district adopts riffled tube.
Horizontal boiler radiation segment structure of the present invention has adopted the square-section, compares with cylindrical shape, has the following advantages: (1) is because after adopting membrane wall structure, make boiler obtain good sealing, reduce leaking out of burner hearth, reduce the radiation loss of boiler, good energy-conserving effect; (2) the cross sectional arrangement number of tubes of same widths and height increases, and has improved the tonnage of boiler, has increased the evaporation capacity of boiler.(3) cancelled the metal pipe frame that directly contacts, reduced the consumption of the higher heat-resisting alloy steel of price, made manufacturing cost decline with flame; (4) reduced by metal pipe frame heat conduction dispersed heat, the radiant section outside wall temperature is dropped to about 50 ℃ by 70-80 ℃ of traditional injection boiler; (5) the injection boiler blowing out loss that brings because of the pipe support scaling loss and the expense of repair and replacement have been reduced; (6) heat-insulation layer is not subjected to the direct radiation of flame, be difficult for by scaling loss, and long service life, maintenance load is little.
When boiler radiant section inlet water temperature is 260 ℃, import tube wall wall temperature is up to about 300 ℃, and the outlet water temperature is 370 ℃, and the outlet wall temperature is up to about 407 ℃.The wall temperature of outlet boiler tube and inlet boiler tube differs nearly 110 ℃, and traditional structure can make the closure plate between outlet boiler tube and the inlet boiler tube damage.The closure plate that the present invention exports between boiler tube and the inlet boiler tube is two connecting plates with free margins and fixed edge, and the fixed edge of two connecting plates connects outlet boiler tube and inlet boiler tube respectively, and free margins is interlaced; Avoided owing to import and export the have big difference unbalanced stress of middle the membrane wall that causes of tube wall temperature and spare property closure plate destroyed.
Among the present invention, boiler tube adopts the odd number root, and the entrance and exit that has guaranteed heating surface makes outlet working medium directly draw respectively at the two ends of body of heater, has simplified the pipeline layout greatly.Outlet boiler tube and inlet boiler tube are positioned at the upper left side or the upper right side of membrane wall, and the outlet boiler tube that present embodiment is the highest with mass dryness fraction is positioned over the upper left side of burner hearth, if the separation of two phenomenon, because gravity effect, water has improved convection transfer rate below pipe, help reducing wall surface temperature.
High heat flux zone at radiant section, boiler tube adopts riffled tube, compare with light pipe and to have the following advantages: working medium forms strong rotation steam flow under the effect of internal thread, the water droplet of center steam flow is deposited on the liquid film because of centrifugal action, has postponed the generation of evaporate to dryness phenomenon; The rotation steam flow of near wall has been strengthened the disturbance to flow boundary layer and thermal boundary layer, has reduced the thermal resistance in boundary layer, and tube wall temperature is reduced, and plays the effect of augmentation of heat transfer; Difficult being entrainmented by the center steam flow of liquid film in the internal thread groove carried; Increase the internal surface area of pipe, reduce the inner surface heat load.Can avoid the generation of boiler film boiling under the subcritical pressure boiler operation, postpone or avoid the generation of supercritical pressure lower class film boiling.
Description of drawings
The present invention is described in further detail below in conjunction with the drawings and specific embodiments.
Fig. 1 is a kind of horizontal boiler radiation segment structure schematic diagram of the present invention;
Fig. 2 is the enclosed construction schematic diagram between Fig. 1 middle outlet boiler tube and the inlet boiler tube;
Fig. 3 is the another kind of enclosed construction schematic diagram between outlet boiler tube and the inlet boiler tube;
Fig. 4 is the third enclosed construction schematic diagram between outlet boiler tube and the inlet boiler tube;
Among the figure: 1, outer jacket; 2, membrane wall; 3, heat-insulation layer; 4, inlet boiler tube; 5, connecting plate; 6, outlet boiler tube; 7, boiler tube; 8, closure plate.
The specific embodiment
With reference to Fig. 1, be a kind of horizontal boiler radiation segment structure of the present invention, mainly comprise outer jacket 1, membrane wall 3, being provided with between outer jacket 1 and membrane wall 3 has heat-insulation layer 2.Outer jacket 1 and membrane wall 3 cross sections are square.
Membrane wall 3 is made up of the many boiler tubes 7 of snakelike connection and the closure plate 8 that is connected between the boiler tube 7, and outlet boiler tube 6 and inlet boiler tube 4 are positioned at the upper left side of membrane wall 3, also can be positioned at the upper right side; 51 of boiler tube 7 is odd number, and therefore, the entrance and exit of membrane wall 3 heating surfaces makes outlet working medium directly draw respectively at the two ends of body of heater, has simplified the pipeline layout greatly.Simultaneously, in order to reduce owing to the existence at burner hearth flue gas dead angle and the boiler tube 7 line swell increment differences that the inequality of being heated causes, avoid the closure plate 8 between the boiler tube 7 to damage, present embodiment is not laid boiler tube 8 in four right angle portions of membrane wall 3, but tilts to connect transition by closure plate 8.
In conjunction with Fig. 2, the closure plate between outlet boiler tube 6 in the boiler tube 7 and the inlet boiler tube 4 is two connecting plates 5 with free margins and fixed edge; The fixed edge of two connecting plates 5 connects outlet boiler tube 4 and inlet boiler tube 6 respectively, and free margins is interlaced.When the line swell increment of outlet boiler tube 6 and inlet boiler tube 4 not simultaneously, the free margins of two connecting plates 5 can the mutual horizontal changing of the relative positions, can not cause the closure plate between outlet boiler tube and the 6 inlet boiler tubes 6 to tear, and more can not damage outlet boiler tube and inlet boiler tube.
In conjunction with Fig. 3, be the another kind of enclosed construction between outlet boiler tube 6 and the inlet boiler tube 4, the free margins of two connecting plates 5 be empty hook-shaped of detaining, free margins can the mutual horizontal changing of the relative positions, and can improve sealing effect.
In conjunction with Fig. 4, be the third enclosed construction between outlet boiler tube 6 and the inlet boiler tube 4, in two connecting plates 5, the free margins of one of them connecting plate 5 is the meander-like with outer opening, the free margins of another connecting plate stretches in the described outer opening.In the present embodiment, the meander-like with outer opening is " own " font, can certainly be other labyrinth seal structures such as " bow " font.Equally, its free margins can the mutual horizontal changing of the relative positions, and can improve sealing effect.
In the present embodiment, have heat-insulation layer to be made of three sublayers between outer jacket and the membrane wall, the outermost sublayer is the standard type alumina silicate fibre, and intermediate part-layer is high-purity type alumina silicate fibre.Two sublayer aluminosilicate materials can drop to 50 ℃ with the temperature of the outer surface of boiler.Between two sublayer aluminium silicate fiber peacekeeping supporting constructions, there is a series of bar for line to fix.Alumina silicate fibre has good hear resistance, can anti-1250 ℃ high temperature.Be coated with one deck high temperature far ultrared paint layer again in interior sublayer.This paint structure has the ability of good reflective thermal radiation, and refractory temperature is 1800 ℃-2000 ℃, can reduce thermal loss, improves the injection boiler thermal efficiency.
In order to prevent owing to the low separation of two phenomenon that causes of mass velocity, present embodiment is positioned over working medium temperature outlet boiler tube the highest and that mass dryness fraction is the highest on the upper left side of burner hearth, if separation of two phenomenon, because gravity effect, water is below pipe, water washes away tube wall than steam flush tube wall convection transfer rate height, helps preventing overtemperature of tube wall.
For fear of the generation of boiler film boiling under the subcritical pressure boiler operation, postpone or avoid the generation of supercritical pressure lower class film boiling, in addition, augmentation of heat transfer, postpone the generation of evaporate to dryness phenomenon, adopt riffled tube, help preventing overtemperature of tube wall in the gas-liquid two-phase zone.
Although below in conjunction with the accompanying drawings embodiment of the present invention are described, the present invention is not limited to above-mentioned specific embodiments, and above-mentioned specific embodiments only is schematic, guiding, rather than restrictive.Those of ordinary skill in the art under the situation that does not break away from the scope that claim of the present invention protects, can also make a variety of forms under the enlightenment of this specification, these all belong to the row of the present invention's protection.
Claims (6)
1. horizontal boiler radiation segment structure, comprise outer jacket, being provided with the cross section in the outer jacket is square membrane wall, described membrane wall comprises many boiler tubes of snakelike connection and is connected closure plate between the boiler tube, it is characterized in that the closure plate between outlet boiler tube in the described boiler tube and the inlet boiler tube is two connecting plates with free margins and fixed edge; The fixed edge of described two connecting plates connects outlet boiler tube and inlet boiler tube respectively, and free margins is interlaced.
2. horizontal boiler radiation segment structure according to claim 1 is characterized in that, the free margins of described two connecting plates is the hook-shaped of empty button.
3. horizontal boiler radiation segment structure according to claim 1 is characterized in that, in described two connecting plates, the free margins of one of them connecting plate is the meander-like with outer opening, and the free margins of another connecting plate stretches in the described outer opening.
4. horizontal boiler radiation segment structure according to claim 1 is characterized in that, described outlet boiler tube and inlet boiler tube are positioned at the upper left side or the upper right side of membrane wall.
5. horizontal boiler radiation segment structure according to claim 1 is characterized in that, transition is tilted to connect by closure plate by the right angle portion of described membrane wall.
6. horizontal boiler radiation segment structure according to claim 1 is characterized in that, the boiler tube in gas-liquid two-phase district adopts riffled tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010216399 CN101893230A (en) | 2010-07-02 | 2010-07-02 | Horizontal boiler radiation segment structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010216399 CN101893230A (en) | 2010-07-02 | 2010-07-02 | Horizontal boiler radiation segment structure |
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| CN101893230A true CN101893230A (en) | 2010-11-24 |
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| CN 201010216399 Pending CN101893230A (en) | 2010-07-02 | 2010-07-02 | Horizontal boiler radiation segment structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105276609A (en) * | 2015-11-16 | 2016-01-27 | 无锡华光锅炉股份有限公司 | Connecting device for partition walls in pulverized coal boiler of reheater |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1109958A (en) * | 1993-12-22 | 1995-10-11 | 燃烧工程有限公司 | Furnace wall tube construction |
| CN101408097A (en) * | 2008-11-26 | 2009-04-15 | 中国石油天然气第八建设有限公司 | Stationary type steam injecting boiler with evaporation of 30 ton / hour |
| CN201288529Y (en) * | 2008-10-08 | 2009-08-12 | 长沙锅炉厂有限责任公司 | Horizontal radiation section for oilfield steam filling boiler |
| CN201327013Y (en) * | 2009-04-08 | 2009-10-14 | 辽河石油勘探局总机械厂 | 100t/h fuel or gas steam injection boiler |
-
2010
- 2010-07-02 CN CN 201010216399 patent/CN101893230A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1109958A (en) * | 1993-12-22 | 1995-10-11 | 燃烧工程有限公司 | Furnace wall tube construction |
| CN201288529Y (en) * | 2008-10-08 | 2009-08-12 | 长沙锅炉厂有限责任公司 | Horizontal radiation section for oilfield steam filling boiler |
| CN101408097A (en) * | 2008-11-26 | 2009-04-15 | 中国石油天然气第八建设有限公司 | Stationary type steam injecting boiler with evaporation of 30 ton / hour |
| CN201327013Y (en) * | 2009-04-08 | 2009-10-14 | 辽河石油勘探局总机械厂 | 100t/h fuel or gas steam injection boiler |
Non-Patent Citations (1)
| Title |
|---|
| 《工业锅炉》 20090630 徐树伟,刘霞 50t/h油田注汽锅炉的设计与开发 , 第3期 2 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105276609A (en) * | 2015-11-16 | 2016-01-27 | 无锡华光锅炉股份有限公司 | Connecting device for partition walls in pulverized coal boiler of reheater |
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Open date: 20101124 |