CN108332181A - A kind of steam boiler - Google Patents
A kind of steam boiler Download PDFInfo
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- CN108332181A CN108332181A CN201710653071.5A CN201710653071A CN108332181A CN 108332181 A CN108332181 A CN 108332181A CN 201710653071 A CN201710653071 A CN 201710653071A CN 108332181 A CN108332181 A CN 108332181A
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- drum
- tedge
- fin
- steam boiler
- radial bars
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- 239000003381 stabilizer Substances 0.000 claims abstract description 52
- 230000007423 decrease Effects 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 239000007788 liquid Substances 0.000 abstract description 24
- 238000012546 transfer Methods 0.000 abstract description 16
- 230000005514 two-phase flow Effects 0.000 abstract description 5
- 230000003416 augmentation Effects 0.000 abstract description 4
- 230000003313 weakening effect Effects 0.000 abstract 1
- 239000012071 phase Substances 0.000 description 26
- 230000000694 effects Effects 0.000 description 22
- 239000012530 fluid Substances 0.000 description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 13
- 239000000203 mixture Substances 0.000 description 10
- 238000013016 damping Methods 0.000 description 8
- 239000007789 gas Substances 0.000 description 8
- 230000001965 increasing effect Effects 0.000 description 8
- 239000007791 liquid phase Substances 0.000 description 8
- 230000009467 reduction Effects 0.000 description 8
- 230000000630 rising effect Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
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- 238000002474 experimental method Methods 0.000 description 4
- 230000001603 reducing effect Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000008439 repair process Effects 0.000 description 3
- 230000006641 stabilisation Effects 0.000 description 3
- 238000011105 stabilization Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011555 saturated liquid Substances 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 208000031481 Pathologic Constriction Diseases 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 206010022000 influenza Diseases 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 230000036262 stenosis Effects 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B21/00—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically
- F22B21/02—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically built-up from substantially straight water tubes
- F22B21/04—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically built-up from substantially straight water tubes involving a single upper drum and a single lower drum, e.g. the drums being arranged transversely
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/10—Water tubes; Accessories therefor
- F22B37/101—Tubes having fins or ribs
- F22B37/103—Internally ribbed tubes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/34—Adaptations of boilers for promoting water circulation
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The present invention provides a kind of steam boilers, including upper drum and lower drum and the tedge and down-comer that are connected between upper drum and lower drum, constant-current stabilizer is set in the tedge, the constant-current stabilizer includes along the central axial setting center-pole of tedge and along center-pole to the more radial bars radially extended, the more fins extended downwardly from radial bars are set in the radial bars, the fin has tip, and the tip is downward.The present invention provides a kind of steam boiler of the constant-current stabilizer of Novel structure, there are when Gas- liquid two-phase flow in tedge, augmentation of heat transfer, while weakening the vibration of tedge, reduce noise level.
Description
Technical field
The invention belongs to steam generation field more particularly to a kind of steam boilers, belong to the fields IPC code F22.
Background technology
Receive heat from stove and fluid is made to flow to high-order circuit referred to as " riser circuit " from low level, and receives heat
It measures and the circuit for making fluid flow to low level from a high position is referred to as " declining circuit ".One circuit is by a pipe or one group of pipe
Composition, this group of pipe are drawn from a common point, such as header or steamdrum, are terminated at and are similarly public as header or drum
Concurrent.
In the design of most of natural circulation boilers, the heat pipe for constituting evaporation section is typically for fluid flows upward, but
In more drum-type boilers, the downflow heated tube of steam-generating bank is quite different.In such boiler, downflow heated tube provides stove
Whole circular flows of interior and steam-generating bank part tedge.
On the one hand, the fluid of tedge is during upwards, usually stream-liquid two-phase flow, so that the stream in tedge
Body is liquid-vapor mixture, and the presence of stream-liquid two-phase flow makes the efficiency for affecting tedge heat absorption.
On the other hand, upper drum this section is exported to from tedge, because the space of this section becomes larger suddenly, the change in space
Quickly flowing upwards out and assemble for gas can be led to by changing, therefore spatial variations can lead to the vapour phase of aggregation（Vapour group）From tedge position
It sets and enters upper drum, due to gas（Vapour）Liquid density contrast, air mass, which leaves, to be taken over position and will move rapidly upward, and air mass original space bit
It sets and the liquid of wall surface is pushed away by air mass while will also spring back and hit wall surface rapidly, form impingement phenomenon.Gas（Vapour）Liquid phase is more not
Continuously, air mass aggregation is bigger, and Impact energy is bigger.Impingement phenomenon can cause larger noise vibrations and mechanical shock, to equipment
It damages.
The present inventor also devises a variety of constant-current stabilizers in applying in front, such as multitube is shown in Figure 7.But this
Kind device is found in operation, because between pipe being the space A phases being closely linked, therefore formed between three pipes
To smaller, because the convex arc that space A is three pipes is formed, therefore most of area stenosis of space A, fluid can be caused to be difficult to
It enters through, causes fluid short, to affect the heat exchange of fluid, good current stabilization can not be played the role of.On simultaneously as
More tube combinations for stating structure together, manufacture difficult.
In view of the above-mentioned problems, the present invention is improved on the basis of invention in front, a kind of new steam copper is provided
Stove, to solve the problems, such as that tedge heat absorption efficiency is low.
Invention content
The present invention provides a kind of new steam boilers, to solve the technical issues of front occurs.
To achieve the goals above, technical scheme is as follows：
A kind of steam boiler, including upper drum and lower drum and the tedge being connected between upper drum and lower drum and decline
Pipe, is arranged constant-current stabilizer in the tedge, the constant-current stabilizer include along the central axial setting center-pole of tedge with
And along center-pole to the more radial bars radially extended, the more wings extended downwardly from radial bars are set in the radial bars
Piece, the fin have tip, and the tip is downward.
Preferably, the boiler includes the first drum, the second drum and third drum, wherein the first drum is positioned at upper
Portion, the second drum are located at middle part, and third drum is located at lower part, between the first drum and the second drum by the first tedge under
Pipe connection is dropped, is connected by down-comer between the second drum and third drum, passes through second between third drum and the first drum
Tedge connects.
Preferably, the tedge of the first drum of connection and the second drum passes through flue, heated by flue residue heat.
Preferably, the tedge of connection third drum and the first drum is heated by burner hearth.
Preferably, header is arranged between third drum and the first drum, the header passes through third with third drum
Tedge connects, and the header is connect with the first drum by the 4th tedge.
Preferably, the fin is triangular fin, a bottom edge of triangle is located in radial bars, corresponding with the side
Angle vertex and the side midpoint 75-135 ° of angle being formed with radial bars of line.
Preferably, angle is 90 °.
Preferably, the fin is isosceles triangle fin, the bottom edge of the isosceles triangle is located in radial bars.
Preferably, the size of the apex angle of isosceles triangle is A, the length on the bottom edge of isosceles triangle is Y, adjacent isosceles
The distance between triangle is J, then meets following require：
Y/J= d-a*sin(A)3-b*sin(A)2-c* sin(A)；Wherein sin is trigonometric function, and a, b, c, d are parameters；
0.360<a<0.365,
0.495<b<0.496,
0.084<c<0.085,
0.411<d<0.412,4<A<33 °,
0.18<Y/J <0.42。
Preferably, a=0.363, b=0.4956, c=0.0846, d=0.4114.
Compared with prior art, the present invention has the advantage that：
1）Bar wing formula constant-current stabilizer is arranged in the present invention in tedge, and two-phase fluid is separated into liquid by bar wing formula constant-current stabilizer
Phase and vapour phase, are divided into small liquid group by liquid phase, vapour phase are divided into minute bubbles, promotes vapour phase smooth outflow, plays regime flow
Effect, have the effect of vibration and noise reducing, improve heat transfer effect.Relative to multitube constant-current stabilizer, current stabilization effect is further increased
Fruit, augmentation of heat transfer, and be simple to manufacture.
2）The present invention is equivalent in tedge by the way that bar wing formula constant-current stabilizer is arranged and increases inner area, enhance and change
Heat improves heat transfer effect.
3）The present invention avoids only because vehicle repair major is divided in the entire cross-section location of tedge
Tedge internal face is split, to entirely rise realized on tube section expand liquid-vaqor interface and vapour phase boundary layer with it is cold
But the contact area of wall surface and enhance disturbance, reduce noise and vibrations, enhance heat transfer.
4）The present invention passes through the distance, the length of constant-current stabilizer that are arranged in tedge short transverse between adjacent constant-current stabilizer
The rule of the parameters sizes such as degree, fin size changes, and to further reach steady flow result, reduces noise, improves heat transfer effect.
5）The present invention is changed by the way that the rule of the parameters sizes such as phase fin size, spacing is arranged in radial directions, to
Further reach steady flow result, reduce noise, improves heat transfer effect.
6）The present invention has been carried out widely by the rule that exchanges heat caused by the variation to bar wing formula constant-current stabilizer parameters
Research, is meeting flow resistance, is realizing the best relation formula of the effect of vibration and noise reducing.
Description of the drawings
Fig. 1 is the steam boiler structural schematic diagram of the present invention；
Fig. 2 is another structural schematic diagram of steam boiler of the present invention；
Fig. 3 is tedge inner section structural schematic diagram；
Fig. 4 is the Section A-A structural schematic diagram of Fig. 3；
Fig. 5 is the preferred isosceles triangle embodiment schematic diagram of constant-current stabilizer of the present invention；
Fig. 6 is constant-current stabilizer dimensional parameters schematic diagram of the present invention；
Fig. 7 is the structural schematic diagram of the two-phase flow tube shell type heat exchanger in background technology.
In figure：1, upper drum, 2, lower drum, 3, tedge, 4, constant-current stabilizer, 41 center-poles, 42 radial bars, 43 fins,
5, down-comer, 6 down-comers, 7 lower drums, 8 tedges, 9 tedges, 10 fire box, 11 outlet headers, 12 flues.
Specific implementation mode
The specific implementation mode of the present invention is described in detail below in conjunction with the accompanying drawings.
Herein, if without specified otherwise, it is related to formula, "/" indicates that division, "×", " * " indicate multiplication.
A kind of steam boiler as described in Figure 1, including upper drum 1 and lower drum 2, the tedge 3 and down-comer 5 connect
Upper drum 1 and lower drum 2.Water enters from upper drum 1 in down-comer 5.Water flows downward in the downcomer, and is collected in and cooks
In cylinder 2.The tedge 3 of boiler is heated by the burning of fuel in fire box 10.The heat absorbed by tedge 3 makes in pipe
Liquid boiling, thus generate the two-phase mixture of water and vapour.Two-phase mixture in tedge 3 reaches upper drum 1.From upper pot
Feed pipe in cylinder 1（It is not shown）The subcooled water of releasing and the saturated liquid released from separator mix to be formed
Cold liquid, subcooled liquid flow out upper drum 1 and enter down-comer 5, and a flow circuit is just completed according to such flow.
The steam boiler of further another embodiment as described in Figure 2, including upper drum 1 and lower drum 2, the rising
Pipe 3 and down-comer 5 connect upper drum 1 and lower drum 2.Water enters steam-generating bank of being heated in smokejack 12 in stove from upper drum 1
In down-comer 5.Water flows downward in the downcomer, and is collected in lower drum 2.Since down-comer 5 absorbs heat, so
The temperature for entering the water in lower drum 2 increases.According to absorbed heat number, the water in lower drum 2 can be supercooling or
Person's saturation.Leave the fluid of lower drum 2（General steam water interface）A part flows upwardly into the tedge 3 of steam-generating bank.
The liquid for flowing upwardly into tedge 3 absorbs heat and enters upper drum 1.
The fluid part for leaving lower drum 2 reaches burner hearth lower drum 7 by down-comer 6.Enter the liquid of a lower drum 7
Body is distributed in each boiler tube 8 being connected with the lower drum 7.Boiler tube is heated by the burning of fuel in fire box 10.By stove
The heat that pipe 8 absorbs makes the liquid boiling in boiler tube 8, thus generates the two-phase mixture of water and vapour.Two-phase mixtures in boiler tube 8
Object or the boiler tube 8 by being directly connected to upper drum 1 reach upper drum 1, the namely tedge of boiler tube 8 at this time, Huo Zhe
Outlet header 11 is arranged in lower drum 7 and upper drum 1 so far, by intermediate tedge 9 by two-phase mixture going out from burner hearth circuit
Mouth header 11 is transmitted to upper drum 1.Inside separator in upper drum 1 separates two-phase mixture into vapour and water.From upper
Feed pipe in drum 1（It is not shown）The subcooled water of releasing and the saturated liquid released from separator mix to be formed
Subcooled liquid, subcooled liquid flow out upper drum 1 and enter down-comer 5, and a flow circuit is just completed according to such flow.
The steam-generating bank of steam boiler, the selected burner hearth furnace wall washed away by combustion-gas flow and convection current furnace wall are come
Say, it is desirable that ensure a critical inputs heat so that fluid restrain and convection current furnace wall circuit in all pipe fully to
Upper circulation and the unstability that will not occur flowing.
Constant-current stabilizer 4 is set in the tedge 3 and/or tedge 8 and/or tedge 9, and the constant-current stabilizer 4 is as schemed
Shown in 2-4, the constant-current stabilizer 4 is as in Figure 2-4, includes along the central axial setting center-pole 41 of tedge 3 and edge
Center-pole 41 to the more radial bars 42 radially extended, more are arranged in the radial bars 42 and is extended downwardly from radial bars 42
Fin 43, the fin 43 have tip, and the tip is downward.
Present invention setting bar wing formula constant-current stabilizer in tedge 3 mainly passes through bar wing formula compared with the application of front
The tip of constant-current stabilizer detaches the liquid phase of the rising in two-phase fluid and vapour phase, the liquid phase in rising is divided into small
The vapour phase of rising to promote liquid phase fast endothermic to be further changed to vapour phase, while being divided into minute bubbles, avoids liquid phase by liquid group
It is completely separable with vapour phase, promote liquid vapor phase smooth outflow in rising, plays the role of regime flow, with vibration and noise reducing
Effect, while also there is augmentation of heat transfer effect.Be found through experiments that, compared with the application of front, this structure can improve 15% with
On vibration and noise reducing effect, while can improve 10% or more heat-transfer effect.
Mentioned tedge below, is all at least one of tedge 3, tedge 8 and tedge 9.
The present invention is equivalent in tedge 3 by the way that bar wing formula constant-current stabilizer is arranged and increases interior heat exchange area, enhance
Heat exchange, improves heat transfer effect.
The present invention is because all cross-section locations by vehicle repair major in tedge 3 are divided, on entire
The segmentation of liquid-vaqor interface and vapour phase boundary layer and the contact area of cooling wall are realized on riser cross section and enhances disturbance, significantly
Reduce noise and vibrations, enhance heat transfer.
Preferably, as illustrated in figures 4-5, the fin 43 is triangular fin.Because triangular fin itself has three
A tip can make full use of tip to carry out current stabilization effect downwards in this way.
The present invention is by being arranged radial bars and along the outwardly extending triangular fin of radial bars, can further increase
Heat exchange area improves heat transfer effect, and because setting triangular fin, passes through the three of the similar acicular texture of triangular fin
Angular tip can further increase flow-disturbing so that fluid is sufficiently mixed, and can further be destroyed the increase of bubble and be gathered
Collection, improves heat transfer effect.
Further preferably, radial bars cross section is rectangle, is preferably square.
Further preferably, radial bars cross section is circle.
Preferably, 42 times of the 0.21-0. of the engineering diameter of a diameter of center-pole of the engineering of radial bars, preferably 0.32
Times.
Preferably, the radial bars are shaft, from the center of circle along the radial inner wall for extending to condenser pipe.
Preferably, multiple triangular fins are arranged in each radial bars, multiple triangular fins are similar figures.
Three interior angles in correspondence with each other of i.e. different triangular fins are identical.
Preferably, the radial bars are round bar, a diameter of 0.7-1.1mm, preferably 0.8mm.
Preferably, fin is extended downwardly from the center line of round bar.The fin is slab construction.The slab construction is prolonged
Stretch the center line that center-pole is passed through in face, and center line of the slab construction extended surface Jing Guo radial bars.
Preferably, such as 4, shown in 5, multiple fins 43 are set, the fin 43 is similar figures in same radial bars（That is wing
Piece is of similar shape）, from the center-pole 41 of tedge 3 to radially extending on direction, the ruler of the fin in same radial bars
It is very little increasing.That is distance center bar 41（I.e. apart from tedge central axis）Distance be S1, the size of fin is C1, and C1 is
The function of distance S1, i.e. C1=F4(S1), meet following require：
C1’>0, wherein C1 ' is the first order derivative of C1.
Because heat exchange occurs mainly in rising tube wall, therefore rises 43 size of fin of tube wall by increase so that
The ability enhancing of the cutting liquid and vapor capacity of near-wall, is reinforced the cutting power of near-wall by emphasis, can be directed to
The noise reduction damping of carry out in light of the circumstances of property, to further realize noise reduction damping effect, while also can further strengthen biography
Heat.
Further preferably, from the center-pole of tedge to radially extending on direction, the size of the fin in same radial bars
Increasing amplitude constantly increases.That is C1 ">0, wherein C1 " are the secondary inverse of C1 respectively.
Show the variation of above-mentioned increasing degree by numerical simulation and experimental study, noise reduction can be further realized
Damping, effect can be turned up close to 9%.
Preferably, multiple fins 43 are arranged in same radial bars 42, from the center-pole 41 of tedge 3 to the side of radially extending
Upwards, the spacing between the fin 43 constantly reduces.The amplitude that spacing between the fin constantly reduces is not
Disconnected increase.
I.e. the distance of distance center bar is S1, and the spacing of fin is J1, J1=F5(S1), meet following require：
J1’<0,J1”>0, wherein J1 ', J1 " are the first order derivative of J1 and secondary inverse respectively.
Concrete principle is same as above.Because heat exchange occurs mainly in rising tube wall, therefore rises the wing of tube wall by increase
The distribution of piece 43 so that the ability enhancing of the cutting liquid and vapor capacity of near-wall, by reinforcing the noise reduction damping of near-wall,
To further realize noise reduction damping effect, while also can further augmentation of heat transfer.
Preferably, a bottom edge of triangle is located in radial bars 42, when with the vertex at corresponding angle with this
The angle that the line at midpoint is formed with radial bars is 75-135 °.Mainly by the setting of above-mentioned angle, fin is enabled to
Tip carries out the cutting of vehicle repair major to the full extent, to further increase the effect of the present invention.
Preferably, the angle that the line at the midpoint when vertex at corresponding angle is with this is formed with radial bars is 90 °.
Preferably, as shown in figure 5, the triangular fin is isosceles triangle fin, the isosceles triangle
Bottom edge is located in radial bars.
It is learnt by analyzing and testing, the spacing between fin 43 cannot be excessive, leads to damping noise reduction if excessive
Effect is bad, while can not be too small, causes resistance excessive if too small, and similarly, the height of fin can not excessive or mistake
Small, the effect for also resulting in damping noise reduction is bad or resistance is excessive, therefore the present invention is through a large number of experiments, is preferentially meeting
Normal flow resistance（Total pressure-bearing be 2.5Mpa hereinafter, the on-way resistance of single riser be less than or equal to 5Pa/M）Feelings
Under condition so that being optimal of damping noise reduction has arranged the best relationship of parameters.
The size of the apex angle of isosceles triangle is A, and the length on the bottom edge of isosceles triangle is Y, adjacent isosceles triangle it
Between distance be J, then meet following require：
Y/J= d-a*sin(A)3-b*sin(A)2-c* sin(A)；Wherein sin is trigonometric function, and a, b, c, d are parameters；
0.360<a<0.365,
0.495<b<0.496,
0.084<c<0.085,
0.411<d<0.412,4<A<33 °,
0.18<Y/J <0.42。
The distance between wherein adjacent isosceles triangle J is adjacent the distance between the midpoint of triangle base.
Preferably, a=0.363, b=0.4956, c=0.0846, d=0.4114.
Preferably, 5<A<30°.
Preferably, radial bars are 5-10 roots, the angle between the radial bars is all equal.
Preferably, radial bars are 8.
Preferably, the length on the bottom edge of isosceles triangle is rise bore 0.02-0.03 times.
Preferably, being B in the angle that tedge and horizontal plane are formed, correction factor e can be increased to data
It is modified, i.e.,
e*(Y/J)= d-a*sin(A)3-b*sin(A)2-c* sin(A)；e=1/sin(B)f, wherein 0.09<d<0.11, preferably d
=0.10。
40°<A<90 °, preferably 70-90 °.
Preferably, along the flow direction of fluid in tedge 3（That is Fig. 4,7 short transverse）, the interior setting of tedge 3
Multiple constant-current stabilizers 4, from the entrance of tedge to the outlet of tedge, the distance between adjacent constant-current stabilizer is shorter and shorter.If
The distance that distance rises tube inlet is H, and the distance between adjacent constant-current stabilizer is S, S=F1(H), i.e. S is using height H as variable
Function, S ' is the first order derivative of S, meets following require：
S’<0;
Main cause is because the steam in tedge understands carrier's liquid, in uphill process, tedge in uphill process
It is continuous heated, cause the steam in biphase gas and liquid flow more and more, because the vapour phase in stream-liquid two-phase flow is more and more, rises
Exchange capability of heat in pipe can increase with vapour phase and weaken relatively, and vibrations and its noise also can constantly increase as vapour phase increases
Add.Therefore need the distance between adjacent constant-current stabilizer being arranged shorter and shorter.
In addition, exporting to condensation collector this section, because the space of this section becomes larger suddenly, the variation in space from tedge
It can lead to quickly flowing upwards out and assemble for gas, therefore spatial variations can lead to the vapour phase of aggregation（Vapour group）From tedge position
Into condensation collector, due to gas（Vapour）Liquid density contrast, air mass, which leaves, to be taken over position and will move rapidly upward, and air mass original space bit
It sets and the liquid of wall surface is pushed away by air mass while will also spring back and hit wall surface rapidly, form impingement phenomenon.Gas（Vapour）Liquid phase is more not
Continuously, air mass aggregation is bigger, and water hammer energy is bigger.Impingement phenomenon can cause larger noise vibrations and mechanical shock, to equipment
It damages.Therefore in order to avoid the generation of this phenomenon, the distance between adjacent constant-current stabilizer being arranged at this time is shorter and shorter,
To constantly separate gas phase and liquid phase in fluid delivery process, to reduce vibrations and noise to the full extent.
It is found through experiments that, by above-mentioned setting, can both reduce vibrations and noise to the full extent, while can carry
High heat transfer effect.
Further preferably, from the entrance of tedge 3 to the outlet of tedge 3, the distance between adjacent constant-current stabilizer is more next
Shorter amplitude is continuously increased.That is S " is the second derivative of S, meets following require：
S”>0;
It is found through experiments that, by so set, 9% or so vibrations and noise can be further decreased, while it is left to improve 7%
Right heat transfer effect.
Preferably, the length of each constant-current stabilizer 4 remains unchanged.
Preferably, other than the distance between adjacent constant-current stabilizer 4, constant-current stabilizer others parameter（Such as length,
Caliber etc.）It remains unchanged.
Preferably, along the short transverse of tedge 3, the multiple constant-current stabilizers 4 of setting in tedge 3, from tedge 3
Entrance is to the outlet of tedge 3, the height of the fin of constant-current stabilizer 4（Radial bars i.e. where fin tip vertex distance fin
Distance）It is increasingly longer.I.e. the fin height of constant-current stabilizer is C, C=F2(H), C ' is the first order derivative of C, meets following require：
C’>0;
Further preferably, from the entrance of tedge to the outlet of tedge, the increasingly longer amplitude of the fin height of constant-current stabilizer
It is continuously increased.That is C " is the second derivative of C, meets following require：
C”>0;
The variation of the distance between for example adjacent constant-current stabilizer of specific reason is identical.
Preferably, the distance between adjacent constant-current stabilizer remains unchanged.
Preferably, the length in addition to constant-current stabilizer is outside one's consideration, constant-current stabilizer others parameter（Such as adjacent spacing, caliber
Deng）It remains unchanged.
Preferably, along the short transverse of tedge 3, the multiple constant-current stabilizers of setting in tedge 3, from tedge 3
Entrance to the outlet of tedge 3, fin distribution density in different constant-current stabilizers 4 it is increasing.That is the fin of constant-current stabilizer
Distribution density is M, M=F3(H), M ' is the first order derivative of M, meets following require：
M’>0;
Preferably, from the entrance of tedge to the outlet of tedge, the smaller and smaller amplitude of the pipe diameter of constant-current stabilizer is not
It is disconnected to increase.I.e.
M " is the second derivative of D, meets following require：
M ”>0。
The variation of the distance between for example adjacent constant-current stabilizer of specific reason is identical.
Preferably, the length of constant-current stabilizer and the distance of adjacent constant-current stabilizer remain unchanged.
Preferably, other than the pipe diameter of constant-current stabilizer, constant-current stabilizer others parameter（Such as it is length, adjacent steady
Flow the distance between device etc.）It remains unchanged.
The distance between adjacent constant-current stabilizer is S, and the internal diameter of tedge is W, and the interval S of wherein constant-current stabilizer is adjacent steady
Flow adjacent the distance between the radial bars central axis of device.
34mm<W<58mm；
50mm<S<80mm。
Preferably, rising length of tube L between 3000-5500mm.Further preferably, between 3500-4500mm.
Further preferably, 40mm<W<50mm；
55mm<S<60mm。
Preferably, S is more than 1.4 times of the height of fin.
It is preferred that the height of the fin is the average value of two maximum fin heights in adjacent radial bars.I.e. first
In radial bars in the maximum height of fin and the second radial bars the maximum height of fin weighted average.
For parameters such as other parameters, such as tube wall, shell wall thickness according to normal standard setting.
Although the present invention has been disclosed in the preferred embodiments as above, present invention is not limited to this.Any art technology
Personnel can make various changes or modifications, therefore protection scope of the present invention is answered without departing from the spirit and scope of the present invention
When being subject to claim limited range.
Claims (10)
1. a kind of steam boiler, including upper drum and lower drum and the tedge being connected between upper drum and lower drum and decline
Pipe, which is characterized in that constant-current stabilizer is set in the tedge, and the constant-current stabilizer includes being set along the central axial of tedge
Set center-pole and along center-pole to the more radial bars radially extended, be arranged in the radial bars more it is downward from radial bars
The fin of extension, the fin have tip, and the tip is downward.
2. steam boiler as described in claim 1, which is characterized in that the boiler includes the first drum, the second drum and the
Three drums, wherein the first drum is located at top, the second drum is located at middle part, and third drum is located at lower part, the first drum and second
It is connected, is connected by down-comer between the second drum and third drum, third with down-comer by the first tedge between drum
It is connected by the second tedge between drum and the first drum.
3. steam boiler as claimed in claim 2, which is characterized in that the tedge of the first drum of connection and the second drum passes through
Flue is heated by flue residue heat.
4. steam boiler as claimed in claim 2, which is characterized in that the tedge of connection third drum and the first drum passes through
Burner hearth heats.
5. steam boiler as claimed in claim 2, which is characterized in that header, institute are arranged between third drum and the first drum
The header stated is connect with third drum by third tedge, and the header is connect with the first drum by the 4th tedge.
6. steam boiler as described in claim 1, which is characterized in that the fin be triangular fin, one of triangle
Bottom edge is located in radial bars, the angle 75- of the line and radial bars formation at midpoint when with the vertex at corresponding angle with this
135°。
7. steam boiler as claimed in claim 6, which is characterized in that angle is 90 °.
8. steam boiler as described in claim 1, which is characterized in that the fin is isosceles triangle fin, the isosceles
The bottom edge of triangle is located in radial bars.
9. steam boiler as claimed in claim 5, which is characterized in that the size of the apex angle of isosceles triangle is A, isoceles triangle
The length on the bottom edge of shape is Y, and the distance between adjacent isosceles triangle is J, then meets following require：
Y/J= d-a*sin(A)3-b*sin(A)2-c* sin(A)；Wherein sin is trigonometric function, and a, b, c, d are parameters；
0.360<a<0.365,
0.495<b<0.496,
0.084<c<0.085,
0.411<d<0.412,4<A<33 °,
0.18<Y/J <0.42。
10. steam boiler as claimed in claim 9, which is characterized in that a=0.363, b=0.4956, c=0.0846, d=
0.4114。
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|---|---|---|---|
| CN201710653071.5A CN108332181B (en) | 2017-08-02 | 2017-08-02 | A kind of steam boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710653071.5A CN108332181B (en) | 2017-08-02 | 2017-08-02 | A kind of steam boiler |
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| Publication Number | Publication Date |
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| CN108332181A true CN108332181A (en) | 2018-07-27 |
| CN108332181B CN108332181B (en) | 2019-03-08 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113623629A (en) * | 2020-11-03 | 2021-11-09 | 中北大学 | Steam boiler with complementary temperature-equalizing plates |
| CN113701137A (en) * | 2020-11-03 | 2021-11-26 | 中北大学 | Steam boiler with optimized distribution of temperature-equalizing plates |
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| CN2854484Y (en) * | 2005-12-15 | 2007-01-03 | 苏州新太铜高效管有限公司 | Heat-exchange pipe for evaporimeter |
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| CN113623629A (en) * | 2020-11-03 | 2021-11-09 | 中北大学 | Steam boiler with complementary temperature-equalizing plates |
| CN113623628A (en) * | 2020-11-03 | 2021-11-09 | 中北大学 | Steam boiler with arc plate |
| CN113701137A (en) * | 2020-11-03 | 2021-11-26 | 中北大学 | Steam boiler with optimized distribution of temperature-equalizing plates |
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| CN113623629B (en) * | 2020-11-03 | 2022-12-27 | 中北大学 | Steam boiler with complementary temperature-equalizing plates |
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|---|---|
| CN108332181B (en) | 2019-03-08 |
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