The content of the invention
The invention provides a kind of new steam boiler, so as to solve the technical problem above occurred.
To achieve these goals, 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
Set in pipe, the tedge in constant-current stabilizer, same tedge and multiple constant-current stabilizers are set, along the fluid stream of tedge
Dynamic direction, the length of the constant-current stabilizer is continuously increased.
Preferably, along the fluid flow direction of tedge, the ever-increasing amplitude of length of the constant-current stabilizer is got over
Come bigger.
Preferably, setting constant-current stabilizer in the tedge, the constant-current stabilizer includes core body and shell, the core body
It is arranged in shell, the shell is connected with rising inside pipe wall, the core body is one extended along outer cover length direction
A number of through hole is provided with body structural member, the structural member.
Preferably, the through hole is circular, the distance between adjacent through hole center of circle L1>2R, wherein R are insertions
Pore radius.
Preferably, setting aperture between adjacent through hole, the connection between through hole is realized by aperture.
Preferably, the rising inside pipe wall sets groove, the shell of the constant-current stabilizer is arranged in groove, described outer
The inwall of shell and the aligning inner of tedge.
Preferably, tedge is welded for multi-segment structure, the junction of multi-segment structure sets constant-current stabilizer.
Preferably, the distance between adjacent constant-current stabilizer is S, the length of constant-current stabilizer is C, and the external diameter of heat exchanger tube is W,
The radius of through hole is R, the distance between adjacent through hole center of circle L1, meets following require:
S/C=a-b*LN (W/(2*R));
L1/(2*R) =c*(W/(2*R))-d*(W/(2*R))2-e
Wherein LN is logarithmic function, a, b, c, and d, e is parameter, wherein 3.0<a<3.5,0.5<b<0.6;2.9<c<3.1,0.33<d
<0.37,4.8<e<5.3;
The spacing of wherein constant-current stabilizer is with the distance between relative two ends of adjacent constant-current stabilizer;
34<W<58mm;
4<R<6mm;
17<C<25mm;
32<S<40mm;
1.05<L1/(2*R)<1.25.
Preferably, a=3.20, b=0.54, c=3.03, d=0.35, e=5.12.Preferably, in tedge and level
The angle that face is formed is A, then
C*S/C=a-b*LN (W/D);c=1/sin(A)d, wherein 0.09<d<0.11,
20°<A<80°。
Preferably, d=0.10.
Preferably, the rising inside pipe wall sets groove, the shell of the constant-current stabilizer is arranged in groove, described outer
The inwall of shell and the aligning inner of tedge.
Preferably, tedge is welded for multi-segment structure, the junction of multi-segment structure sets constant-current stabilizer.
Compared with prior art, the present invention has the advantage that:
1)Length change of the invention by constant-current stabilizer, when there is Gas- liquid two-phase flow in tedge, augmentation of heat transfer, simultaneously
Weaken the vibration of tedge, reduce noise level.
2)The present invention sets porous type constant-current stabilizer in tedge, is separated two-phase fluid by porous type constant-current stabilizer
Into liquid phase and vapour phase, liquid phase is divided into small liquid group, vapour phase is divided into minute bubbles, promotes vapour phase smooth outflow, play stabilization
The effect of flow, the effect with vibration and noise reducing improves heat transfer effect.Relative to multitube constant-current stabilizer, further improve steady
Effect, augmentation of heat transfer are flowed, and is simple to manufacture.
3)The present invention, equivalent to interior heat exchange area is added in tedge, is strengthened by setting porous type constant-current stabilizer
Heat exchange, improves heat transfer effect.
4)The present invention is because vehicle repair major is split in the whole cross-section location of tedge, it is to avoid only
Tedge internal face is split, thus 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 and strengthen disturbance, reduce noise and vibrations, enhance heat transfer.
5)The present invention on tedge fluid flow direction by setting distance between adjacent constant-current stabilizer, constant-current stabilizer
The parameter size such as length, the external diameter of pipe rule change, so as to further reach steady flow result, reduce noise, raising is changed
Thermal effect.
6)The present invention has been carried out widely by the rule that exchanged heat caused by the change to porous type constant-current stabilizer parameters
Research, in the case of flow resistance is met, realizes the best relation formula of the effect of vibration and noise reducing.
Embodiment
The embodiment to the present invention is described in detail below in conjunction with the accompanying drawings.
Herein, if without specified otherwise, being related to formula, "/" represents division, and "×", " * " represent 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 are connected
Upper drum 1 and lower drum 2.Water enters in down-comer 5 from upper drum 1.Water flows downward in down-comer, and is collected in and cooks
In cylinder 2.The burning of the fuel in fire box 10 of tedge 3 of boiler is heated.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 outflow upper drum 1 enters down-comer 5, and a flow circuit is just completed according to such flow.
The further steam boiler of another embodiment as described in Figure 2, including upper drum 1 and lower drum 2, it is described to rise
Pipe 3 and the connection upper drum 1 of down-comer 5 and lower drum 2.Water enters steam-generating bank of being heated in stove in smokejack 12 from upper drum 1
In down-comer 5.Water flows downward in down-comer, and is collected in lower drum 2.Because down-comer 5 absorbs heat, so
Enter the temperature rise of the water in lower drum 2.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 is flowed 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.The burning of boiler tube fuel in fire box 10 is heated.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
Thing reaches upper drum 1, the namely tedge of boiler tube 8 now, Huo Zhe by the boiler tube 8 being directly connected to upper drum 1
Lower drum 7 and upper drum 1 set outlet header 11 so far, by middle tedge 9 by two-phase mixture going out from burner hearth loop
Mouth header 11 is sent 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 outflow upper drum 1 enters down-comer 5, and a flow circuit is just completed according to such flow.
Steam-generating bank, the selected burner hearth furnace wall washed away by combustion-gas flow and convection current furnace wall for steam boiler come
Say, it is desirable to ensure a critical inputs heat so that in fluid pipe all in tube bank and convection current furnace wall loop fully to
Upper circulation and the unstability that flowing will not be produced.
Constant-current stabilizer 4, the constant-current stabilizer 4 such as Fig. 3 are set in the tedge 3 and/or tedge 8 and/or tedge 9
Shown, the constant-current stabilizer 4 includes core body and shell 41, and the core body is arranged in shell 41, in the shell and tedge
Wall is connected, and the core body is provided with the integral structure part 43 extended along outer cover length direction, the structural member
A number of through hole 42.
The present invention sets porous type constant-current stabilizer in tedge, by porous type constant-current stabilizer by the liquid in two-phase fluid
Mutually separated with vapour phase, liquid phase is divided into small liquid group, vapour phase is divided into minute bubbles, it is to avoid liquid phase and vapour phase are divided completely
Open, promote liquid vapor phase smooth outflow, play a part of regime flow, the effect with vibration and noise reducing.It is steady relative to multitube
Device is flowed, steady flow result, augmentation of heat transfer is further improved, and be simple to manufacture.
Mentioned tedge, is all at least one in tedge 3, tedge 8 and tedge 9 below.
The present invention, equivalent to interior heat exchange area is added in tedge 3, is enhanced by setting porous type constant-current stabilizer
Heat exchange, improves heat transfer effect.
The present invention is because all cross-section locations by vehicle repair major in tedge 3 are split, so that on whole
Liquid-vaqor interface and the segmentation in vapour phase boundary layer and the contact area of cooling wall are realized on riser cross section and strengthens disturbance, significantly
Reduce noise and vibrations, enhance heat transfer.
Preferably, the through hole is circular, the distance between adjacent through hole center of circle L1>2R, wherein R are insertions
Pore radius.
Pass through the distance between through hole center of circle L1>2R so that maintained a certain distance between adjacent through hole 42, from
And ensure each hole and preferably separate two phase flow fluid.
Preferably, the core body is the structural member that integration is processed.By setting porous core body, system can be caused
Make simple.
Preferably, setting aperture to realize insertion between adjacent through hole 42.By setting aperture, it is ensured that adjacent
Interconnected between through hole, pressure that can uniformly between through hole so that the fluid of high pressure runner flows to low pressure, while
Liquid phase and vapour phase can further be separated while flow of fluid, be conducive to further stablizing two-phase flow.
Preferably, along the flow direction of fluid in tedge 3(That is Fig. 3 short transverse), tedge 3 is interior to set many
Individual constant-current stabilizer 4, from the entrance of tedge to the outlet of tedge, the distance between adjacent constant-current stabilizer is shorter and shorter.If away from
From being H with a distance from rising tube inlet, the spacing between adjacent constant-current stabilizer is S, S=F1(H), i.e. S be using apart from H as variable
Function, S ' is S first order derivative, meets following require:
S’<0;
Main cause is because the gas in tedge understands carrier's liquid, in uphill process, tedge in uphill process
It is constantly heated, cause the gas in biphase gas and liquid flow more and more, because the vapour phase in stream-liquid two-phase flow is more and more, rise
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
Plus.Therefore need the distance between the adjacent constant-current stabilizer of setting shorter and shorter.
In addition, exporting to outlet header 11 this section from tedge 8, also have from tedge 9 and 3 to this section of upper drum 1,
Because the space of this section becomes big suddenly, the change in space can cause the quick of gas to flow upwards out and assemble, therefore space becomes
The vapour phase of aggregation can be caused by changing(Vapour group)Enter condensation collector from tedge position, due to gas(Vapour)Liquid density contrast, air mass leaves
Adapter position will be moved rapidly upward, and the former locus of air mass pushes away the liquid of wall while also by rapid resilience simultaneously by air mass
Wall is hit, impingement phenomenon is formed.Gas(Vapour)Liquid phase is more discontinuous, and air mass aggregation is bigger, and water hammer energy is bigger.Impingement phenomenon meeting
Cause larger noise to shake and mechanical shock, equipment is damaged.Therefore in order to avoid the generation of this phenomenon, now set
The distance between the adjacent constant-current stabilizer put is shorter and shorter, so that constantly separate gas phase and liquid phase in fluid delivery process,
So as to reduce vibrations and noise to the full extent.
It is found through experiments that, by above-mentioned setting, vibrations and noise can be both reduced to the full extent, while can carry
High heat transfer effect.
Further preferably, from the entrance of tedge to the outlet of tedge, the distance between adjacent constant-current stabilizer is increasingly
Short amplitude is continuously increased.That is S " is S second derivative, meets following require:
S”>0;
It is found through experiments that, by being arranged such, can further reduces by 9% or so vibrations and noise, while it is left to improve 7%
Right heat transfer effect.
Preferably, the length of each constant-current stabilizer 4 keeps constant.
Preferably, in addition to the distance between adjacent constant-current stabilizer 4, constant-current stabilizer others parameter(Such as length,
Caliber etc.)Keep constant.
Preferably, along rise tube fluid flow direction(Fluid flows to upper direction), tedge is interior to be set
Multiple constant-current stabilizers 4, from the entrance of tedge to the outlet of tedge, the length of constant-current stabilizer 4 is increasingly longer.That is constant-current stabilizer
Length be C, C=F2(X), C ' is C first order derivative, meets following require:
C’>0;
Further preferably, from the entrance of tedge to the outlet of tedge, the increasingly longer amplitude of the length of constant-current stabilizer is continuous
Increase.That is C " is C second derivative, meets following require:
C”>0;
The change of the distance between for example adjacent constant-current stabilizer of specific reason is identical.
Preferably, the distance between adjacent constant-current stabilizer keeps constant.
Preferably, except the length of constant-current stabilizer is outside one's consideration, constant-current stabilizer others parameter(Such as adjacent spacing, caliber
Deng)Keep constant.
Preferably, along rise tube fluid flow direction(I.e. along tedge bearing of trend), set in tedge
Multiple constant-current stabilizers are put, from the entrance of tedge to the outlet of tedge, the diameter of the through hole 42 in different constant-current stabilizers 4 is got over
Come smaller.That is the through hole a diameter of D, D=F of constant-current stabilizer3(X), D ' is D first order derivative, meets following require:
D’<0;
Preferably, from the entrance of tedge to the outlet of tedge, the less and less amplitude of the insertion bore dia of constant-current stabilizer
It is continuously increased.I.e.
D " is D second derivative, meets following require:
D”>0。
The change 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 keep constant.
Preferably, in addition to the insertion bore dia of constant-current stabilizer, constant-current stabilizer others parameter(Such as length, adjacent
The distance between constant-current stabilizer etc.)Keep constant.
Further preferably, as shown in figure 4, setting groove inside the tedge, the shell 41 of the constant-current stabilizer 4 is set
In groove.
Preferably, the inwall and the aligning inner of tedge of shell 41.Pass through alignment so that tedge internal face surface
On reach in approximately the same plane, it is ensured that surface it is smooth.
Preferably, the thickness of shell 41 is less than the depth of groove, it can so cause tedge internal face formation groove,
So as to carry out augmentation of heat transfer.
Further preferably, as shown in figure 5, tedge is welded for multi-segment structure, the junction of multi-segment structure sets steady
Flow device 4.This mode causes being simple to manufacture for the tedge for setting constant-current stabilizer, cost reduction.
By analysis and experiment learn, the spacing between constant-current stabilizer can not be excessive, it is excessive if cause damping noise reduction
Effect it is bad, while can not be too small, it is too small if cause resistance excessive, similarly, the external diameter of through hole can not it is excessive or
Person is too small, and the effect for also resulting in damping noise reduction is bad or resistance is excessive, therefore the present invention is by substantial amounts of experiment, preferential
Meet normal flow resistance(Total pressure-bearing is below 2.5Mpa, or the on-way resistance of single riser is less than or equal to 5Pa/M)
In the case of so that being optimal of damping noise reduction, arrange the optimal relation of parameters.
Spacing between adjacent constant-current stabilizer is S, and the length of constant-current stabilizer is C, and the external diameter of tedge is W, constant-current stabilizer
The a diameter of D of through hole, meet following require:
Preferably, the distance between adjacent constant-current stabilizer is S, the length of constant-current stabilizer is C, and the external diameter of heat exchanger tube is W, insertion
The radius in hole is R, the distance between adjacent through hole center of circle L1, meets following require:
S/C=a-b*LN (W/(2*R));
L1/(2*R) =c*(W/(2*R))-d*(W/(2*R))2-e
Wherein LN is logarithmic function, a, b, c, and d, e is parameter, wherein 3.0<a<3.5,0.5<b<0.6;2.9<c<3.1,0.33<d
<0.37,4.8<e<5.3;
The interval S of wherein constant-current stabilizer is with the distance between relative two ends of adjacent constant-current stabilizer;That is above constant-current stabilizer
Tail end and the distance between front end of constant-current stabilizer below.Referring specifically to Fig. 4 mark.
34<W<58mm;
4<R<6mm;
17<C<25mm;
32<S<40mm;
1.05<L1/(2*R)<1.25.
Preferably, a=3.20, b=0.54, c=3.03, d=0.35, e=5.12.
Preferably, rising length of tube L between 3000-8500mm.Further preferably, between 4500-5500mm.
Further preferably, 40mm<W<50mm;
9mm<2R<10mm;
22mm<C<24mm;
35mm<S<38mm。
By the preferred of the optimal geometric scale of above-mentioned formula, it can realize under the conditions of meeting normal flow resistance,
Damping noise reduction reaches optimum efficiency.
Further preferably, as W/R increase, a constantly reduce, b constantly increases.
For other parameters, the parameter such as tube wall, housing wall thickness is set according to normal standard.
Preferably, through hole 42 extends in the whole length direction of constant-current stabilizer 4.I.e. the length of through hole 42 is equal to steady
Flow the length of device 4.
Preferably, in the case of the angle that tedge and horizontal plane are formed is A, correction factor c can be increased to data
It is modified, i.e.,
C*S/C=a-b*LN (W/D);c=1/sin(A)d, wherein 0.09<d<0.11, preferably d=0.10.
20°<A<80 °, preferably 40-60 °.
Although the present invention is disclosed as above with preferred embodiment, the present invention is not limited to this.Any art technology
Personnel, without departing from the spirit and scope of the present invention, can make various changes or modifications, therefore protection scope of the present invention should
It is defined when by claim limited range.