CN109519953A - A kind of flue gas in power station boiler afterheat utilizing system of flow equalization - Google Patents
A kind of flue gas in power station boiler afterheat utilizing system of flow equalization Download PDFInfo
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- CN109519953A CN109519953A CN201810805016.8A CN201810805016A CN109519953A CN 109519953 A CN109519953 A CN 109519953A CN 201810805016 A CN201810805016 A CN 201810805016A CN 109519953 A CN109519953 A CN 109519953A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
- F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
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- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The present invention provides a kind of flue gas in power station boiler afterheat utilizing system, including heat pipe, exhaust gases passes and air duct, the heat pipe includes evaporation ends and condensation end, and the condensation end setting is in the air passageway；Evaporation ends are arranged in exhaust gases passes；Evaporation ends absorb the waste heat of flue gas in exhaust gases passes, and the air in air duct is transferred heat to by condensation end；Air after preheating enters boiler furnace and carries out combustion-supporting, and the heat pipe is parallel more, and equalizer flow tube is arranged between at least two adjacent heat pipes.The present invention provides a kind of residual heat using device of Novel structure, by the way that equalizer flow tube is arranged between heat pipe, ensure that the uniform of pressure in each heat pipe, fluid flow it is evenly distributed and fluid motion resistance evenly distributed.
Description
Technical field
The present invention is a portion for the project researched and developed jointly with enterprise, is related to heat pipe waste heat recycling field, special
It is not to be related to a kind of utilization heat pipe Mist heat recovering method and device.
Background technique
With China's rapid economic development, energy consumption increasingly increases, and the problem of urban air quality worsening is also got over
The problem of hair protrudes, energy saving and reduction environment harmful discharge is extremely urgent.In common steam generating process, energy consumption
The main reason for high, seriously polluted first is that the exhaust gas temperature of boiler smoke is excessively high, waste mass energy, therefore to boiler tail
Gas waste heat carries out recycling and reusing, realizes the purpose of energy-saving and emission-reduction, while can also protect environment.But in the prior art full
While sufficient fume afterheat, it may occur that low-temperature corrosion, therefore how to avoid low-temperature corrosion is an important problem, simultaneously
If waste heat waste is too many in flue gas in some cases in order to just to avoid low-temperature corrosion, lead to that waste heat benefit occurs
With the bad problem of effect, therefore above-mentioned relevant issues are urgently to be resolved.
Hot pipe technique is George Ge Luofo of U.S. Los Alamos (Los Alamos) National Laboratory in 1963
One kind of (George Grover) invention is known as the heat transfer element of " heat pipe ", it takes full advantage of heat-conduction principle and phase transformation is situated between
The heat of thermal objects is transmitted to outside heat source rapidly by the quick thermal transport property of matter through heat pipe, and the capacity of heat transmission is more than to appoint
The capacity of heat transmission of what known metal.Compared to shell-and-tube heat exchanger the most commonly used in the recycling of coal-fired flue-gas waste heat, heat pipe heat exchanging
Device has many advantages, such as that heat transfer efficiency is high, compact-sized, the pressure loss is small, is conducive to control dew point corrosion, in coal-fired flue-gas waste heat
Potentiality are had more in recycling.
In addition, heat pipe heat exchanging fluid in heat exchange is all steam water interface.Heat pipe is in evaporation process, inevitably
In carrying of liquids to steam end, simultaneously as the exothermic condensation of condensation end, so that there are liquid in condensation end, liquid is not yet
Evitable to mix with steam, so that the fluid in heat pipe is liquid-vapor mixture, liquid-vapor mixture, which exists, causes steam mixed
Exchange capability of heat declines between Cheng Yituan, with liquid, greatly affects the efficiency of heat exchange.
Summary of the invention
The present invention aiming at the shortcomings in the prior art, provides the flue gas waste heat utilization device and method of a kind of Novel structure,
Heat source is made full use of, energy consumption is reduced, improves smoke discharging effect.
To achieve the above object, the present invention adopts the following technical scheme:
A kind of flue gas in power station boiler afterheat utilizing system, including heat pipe, exhaust gases passes and air duct, the heat pipe include evaporation
End and condensation end, the condensation end setting is in the air passageway；Evaporation ends are arranged in exhaust gases passes；It is logical that evaporation ends absorb flue gas
The waste heat of flue gas in road, the air in air duct is transferred heat to by condensation end；Air after preheating enters Boiler Furnace
Thorax carries out combustion-supporting, which is characterized in that the heat pipe is more in parallel, and equalizer flow tube is arranged between at least two adjacent heat pipes.
Preferably, multiple equalizer flow tubes are arranged between adjacent heat pipe from heat pipe evaporation ends to condensation end of heat pipe direction.
Preferably, from heat pipe evaporation ends to condensation end of heat pipe direction, the distance between adjacent equalizer flow tube is no in evaporation ends
It is disconnected to reduce.
Preferably, stabilising arrangement is arranged in the heat pipe, the stabilising arrangement is laminated structure, and the laminated structure exists
It is arranged on the cross section of heat pipe；The stabilising arrangement is square through-hole and octagon through-hole composition, the square through-hole
Side length be equal to the side length of octagon through-hole, four sides of the square through-hole are that four different octagons are logical respectively
The side in hole, four of octagon through-hole apart from one another by while be respectively four different square through-holes while.
Preferably, the cross section of heat pipe is square.
Preferably, the distance between adjacent stable device is M1, the side length of square through-hole is C1, and heat pipe is square
Section, the side length of heat pipe square section are C2, meet following require:
M1/C2=a*Ln(C1/C2) +b
Wherein a, b are parameters, wherein 1.725 < a < 1.733,4.99 <b < 5.01； 11<C2<46mm；
1.9 < C1 < 3.2mm；
18<M1<27mm。
Preferably, the stabilising arrangement includes at least one of following two type, the first seed type is square
Central stabilizer device, square through-hole are located at the center of heat pipe, and second of type is octagon central stabilizer device, positive eight side
Shape through-hole is located at the center of heat pipe.
Preferably, the stabilising arrangement type being disposed adjacent is different.
The present invention has the advantage that
1) the present invention provides a kind of residual heat using devices of Novel structure ensure that by the way that equalizer flow tube is arranged between heat pipe
Pressure is uniform in each heat pipe, fluid flow it is evenly distributed and fluid motion resistance evenly distributed.
2) stabilization of the Novel structure combined the present invention provides a kind of new-type square through-hole and octagon through-hole
The station boiler afterheat utilizing system of device, by square and octagon, so that the square hole and octagon that are formed
The angle that the side in hole is formed all is greater than equal to 90 degree, so that fluid can sufficiently flow through each position in each hole, is kept away
Exempt from or reduce the short circuit of fluid flowing.It is gentle that two-phase fluid by the stabilising arrangement of Novel structure is separated into liquid phase by the present invention
Liquid phase is divided into small liquid group, gas phase is divided into minute bubbles, inhibits the reflux of liquid phase, promotes gas phase smooth outflow, plays by phase
The effect of regime flow improves heat transfer effect.Stabilising arrangement in compared with the existing technology further increases steady flow result, by force
Change heat transfer, and is simple to manufacture.
3) present invention is by being reasonably laid out, so that square and octagon through-hole are evenly distributed, so that whole
On rank street face on fluid segmentation uniformly, avoid the segmentation of ring structure in the prior art circumferentially and unevenly ask
Topic.
4) present invention is uniformly distributed by the interval of square hole and octagon hole, so that macropore and aperture are whole
Body is evenly distributed on cross section, and by the change in location of the macropore of adjacent stabilising arrangement and aperture, so that segregation
More preferably.
5) present invention is laminated structure by setting stabilising arrangement, so that stabilising arrangement structure is simple, cost is reduced.
6) present invention passes through the distance being arranged between adjacent stable device in absorbing pipe short transverse, the hole of stabilising arrangement
Side length, the parameters size such as caliber, the tube spacing of absorbing pipe rule variation, have studied the optimal relationship ruler of above-mentioned parameter
It is very little, to further reach steady flow result, noise is reduced, improves heat transfer effect.
7) present invention is conducted extensive research by heat exchange rule caused by the variation to stabilising arrangement parameters,
In the case of meeting flow resistance, the best relation formula of heat transfer effect is realized.
8) a kind of residual heat using device of Novel structure is provided, by the way that equalizer flow tube is arranged between heat pipe, ensure that each
Pressure is uniform in a heat pipe, fluid flow it is evenly distributed and fluid motion resistance evenly distributed.
Detailed description of the invention:
Fig. 1 is the structural schematic diagram of station boiler afterheat utilizing system of the present invention.
Fig. 2 stabilising arrangement cross-sectional structure schematic diagram of the present invention；
Another cross-sectional structure schematic diagram of Fig. 3 stabilising arrangement of the present invention；
Fig. 4 is stabilising arrangement of the present invention arrangement schematic diagram in heat pipe；
Fig. 5 is that stabilising arrangement of the present invention arranges cross-sectional view in heat pipe；
Fig. 6 is the cross-sectional view of heat pipe setting equalizer flow tube of the present invention.
In figure: 1, exhaust gases passes, 11, heat pipe, 2 air ducts, 3 equalizer flow tubes, 4 stabilising arrangements, 41 square through-holes, 42
Octagon through-hole, 43 sides.
Specific embodiment
A kind of boiler flue smoke waste heat utilization system, the afterheat utilizing system include heat pipe 11, exhaust gases passes 1 and sky
Gas channel 2, the heat pipe 11 include evaporation ends 111 and condensation end 112, and the condensation end 112 is arranged in air duct 12, are steamed
Originator 11 is arranged in flue.Evaporation ends 111 absorb the waste heat of flue gas in boiler flue, by condensation end 112 by heat transfer
To the air in air duct 12.It is combustion-supporting that air after preheating enters boiler furnace progress.
Heat pipe of the present invention absorbs heat in operation, by evaporation ends 111 from flue gas, then releases heat in condensation end
It puts to air, fluid is condensed, and enters back into evaporation ends 111 by the effect of gravity.
In the process of running, there are fluid distribution unevenly for residual heat using device, and because during thermal-arrest, it is different
The heat that absorbs of heat pipe it is different, cause fluid temperature (F.T.) in different heat pipes different, even fluid in some heat pipes, such as water at
For the state of gas-liquid two-phase, the hot tube fluid having is still liquid, leads to heat pipe internal pressure because fluid becomes steam in this way
Power becomes larger, therefore by the way that equalizer flow tube is arranged between heat pipe, can fluid be flowed mutually in heat pipe, so that all
Pressure distribution in heat pipe reaches balance, and fluid distribution can also be promoted to reach balance.
Alternatively, as shown in fig. 6, equalizer flow tube 3 is arranged between the heat pipe.At least two adjacent heat pipes 11
Between be arranged equalizer flow tube 3.It finds under study for action, during evaporation tube heat absorption is exothermic, it may appear that the heat absorption of different location is put
The caloric receptivity thermal discharge of heat pipe is different, leads to pressure or temperature difference between heat pipe 11, will lead to part heat pipe 11 in this way
Temperature is excessively high, causes the lost of life, once heat pipe 11 goes wrong, may cause entire afterheat utilizing system and is not available
The problem of.Equalizer flow tube 3 is arranged by largely studying, in adjacent heat pipe in the present invention, can cause in the heated difference of heat pipe
In the case that pressure is different, the fluid in heat pipe 11 that pressure can be made big quickly flows to the small heat pipe 11 of pressure, thus
It keeps integral pressure balanced, avoids hot-spot or supercooling.
Preferably, condensing extreme direction from 11 evaporation ends of heat pipe to heat pipe 11, it is arranged between adjacent heat pipe 11 multiple equal
Flow tube 3.By the way that multiple equalizer flow tubes are arranged, fluid continuous counterpressure in heat absorption evaporation process is enabled to, is guaranteed entire
Pressure in heat pipe is balanced.
Preferably, in evaporation ends 111, extreme direction is condensed from 11 evaporation ends of heat pipe to heat pipe 11, between adjacent equalizer flow tube 3
Distance constantly reduce.This purpose is in order to which more equalizer flow tubes are arranged, because of flowing up with fluid, fluid is continuous
Heat absorption, as fluid constantly absorbs heat, the pressure in different heat pipes is more and more uneven, therefore passes through above-mentioned setting, Neng Goubao
Card reaches pressure equilibrium as soon as possible in process fluid flow.
Preferably, in evaporation ends 111, extreme direction is condensed from 11 evaporation ends of heat pipe to heat pipe 11, between adjacent equalizer flow tube
The ever-reduced amplitude of distance it is increasing.It is found through experiments that, above-mentioned setting can guarantee in process fluid flow more
It is excellent to reach pressure equilibrium faster.This is also the optimal connection side got and largely studying pressure changes in distribution rule
Formula.
Preferably, condensing extreme direction from 11 evaporation ends of heat pipe to heat pipe 11, the diameter of equalizer flow tube 3 is not in evaporation ends 111
It is disconnected to increase.This purpose is to be arranged and guarantee bigger connection area, because of flowing up with fluid, fluid is constantly inhaled
It is thermally generated steam, with the continuous bad student of steam, the temperature, pressure in different heat pipes is more and more uneven, therefore sets by above-mentioned
It sets, can guarantee to reach pressure equilibrium as soon as possible in process fluid flow.
Preferably, condensing extreme direction from 11 evaporation ends of heat pipe to heat pipe 11, the diameter of equalizer flow tube 3 is not in evaporation ends 111
Increased amplitude of breaking is increasing.It is found through experiments that, above-mentioned setting, can guarantee more excellent faster in process fluid flow
Reach pressure equilibrium.This is also the optimal mode of communicating got and largely studying pressure changes in distribution rule.
Preferably, in condensation end 112, extreme direction is condensed from 11 evaporation ends of heat pipe to heat pipe 11, between adjacent equalizer flow tube 3
Distance be continuously increased.This purpose is to reduce cost in order to which less equalizer flow tube is arranged.Because with the lower part of condensation end 112
Upwards, the continuous exothermic condensation of steam in heat pipe, with the continuous heat release of fluid, the pressure in heat pipe is smaller and smaller, therefore not
Uniform phenomenon also increasingly mitigates, therefore by above-mentioned setting, can save material, and equalizer flow tube is arranged according to pressure change,
It can guarantee to reach pressure equilibrium as soon as possible in process fluid flow.
Preferably, in condensation end 112, extreme direction is condensed from 11 evaporation ends of heat pipe to heat pipe 11, between adjacent equalizer flow tube
The ever-increasing amplitude of distance it is increasing.It is found through experiments that, above-mentioned setting can guarantee in process fluid flow more
It is excellent to reach pressure equilibrium faster.This is also the optimal connection side got and largely studying pressure changes in distribution rule
Formula.
Preferably, condensing extreme direction from 11 evaporation ends of heat pipe to heat pipe 11, the diameter of equalizer flow tube 3 is not in condensation end 112
It is disconnected to reduce.This purpose is to reduce cost to be arranged and guarantee reduced connection area.With front apart from ever-increasing principle phase
Together.
Preferably, condensing extreme direction from 11 evaporation ends of heat pipe to heat pipe 11, the diameter of equalizer flow tube 3 is not in condensation end 112
Disconnected reduced amplitude is increasing.It is found through experiments that, above-mentioned setting, can guarantee more excellent faster in process fluid flow
Reach pressure equilibrium.This is also the optimal mode of communicating got and largely studying pressure changes in distribution rule.
In heat pipe because steam heat exchange so that there is stream-liquid two-phase flow in heat pipe, on the one hand, heat pipe in evaporation process,
Inevitably in carrying of liquids to heat pipe, simultaneously as the exothermic condensation of condensation end, so that there are liquid in condensation end
Body, liquid also inevitably enter in steam, so that the fluid in heat pipe is liquid-vapor mixture, while heat pipe is being run
The on-condensible gas that can be generated in the process because of aging, on-condensible gas are typically raised to the condensation end on heat pipe top, on-condensible gas
Presence lead to the pressure increase in condensation end of heat pipe, pressure flows liquid into heat pipe.Greatly affect heat exchange
Efficiency.Therefore this invention takes new structures, to divide liquid and vapor capacity, so that heat exchange is reinforced.
Stabilising arrangement 4 is set in heat pipe, and the structure of the stabilising arrangement 4 is as shown in Figure 2,3.The stabilising arrangement 4 is piece
Shape structure, the laminated structure are arranged on the cross section of heat pipe 11；The stabilising arrangement 4 is square and octagon structure
Composition, to form square through-hole 41 and octagon through-hole 42.The side length of square through-hole 41 as described in Figure 2 is equal to positive eight
The side length of side shape through-hole 42, four of the square through-hole while 43 be respectively four different octagon through-holes while 43,
Positive eight deformation four of through-hole apart from one another by while 43 be respectively four different square through-holes while 43.
The present invention uses the stabilising arrangement of Novel structure, has the advantages that
1) stabilising arrangement of the Novel structure combined the present invention provides a kind of new-type square through-hole and octagon through-hole,
By square and octagon, so that the angle that the side of the square hole and octagon hole that are formed is formed all is greater than and is equal to
90 degree, so that fluid can sufficiently flow through each position in each hole, avoid or reduce the short circuit of fluid flowing.This hair
It is bright that two-phase fluid is separated by liquid and gas by the stabilising arrangement of Novel structure, liquid phase is divided into small liquid group, by gas phase
Minute bubbles are divided into, the reflux of liquid phase is inhibited, promotes gas phase smooth outflow, plays the role of regime flow, there is vibration and noise reducing
Effect, improve heat transfer effect.Stabilising arrangement in compared with the existing technology, further increases steady flow result, augmentation of heat transfer, and
And it is simple to manufacture.
2) present invention is by being reasonably laid out, so that square and octagon through-hole are evenly distributed, so that whole
On rank street face on fluid segmentation uniformly, avoid the segmentation of ring structure in the prior art circumferentially and unevenly ask
Topic.
3) present invention is uniformly distributed by the interval of square hole and octagon through-hole, so that macropore and aperture exist
It is evenly distributed on whole cross section, and by the change in location of the macropore of adjacent stabilising arrangement and aperture, so that separating effect
Fruit is more preferable.
4) present invention is laminated structure by setting stabilising arrangement, so that stabilising arrangement structure is simple, cost is reduced.
The present invention is equivalent to by the annular stabilising arrangement of setting and increases interior heat exchange area in heat pipe, enhance heat exchange,
Improve heat transfer effect.
The present invention is because all cross-section locations by gas-liquid two-phase in all heat exchanger tubes are divided, thus entire
The segmentation of gas-liquid interface and gas phase boundary and the contact area of cooling wall are realized on heat exchange tube section and enhances disturbance, greatly
Big reduces noise and vibration, enhances heat transfer.
Preferably, the stabilising arrangement includes two types, such as Fig. 2, shown in 3, the first seed type is square center
Stabilising arrangement, square are located at the center of heat pipe or condenser pipe, as shown in Figure 3.Second is octagon central stabilizer dress
It sets, octagon is located at the center of heat pipe or condenser pipe, as shown in Figure 2.Preferably as one, the stabilization of above two type
Device is disposed adjacent, that is, the stabilising arrangement type being disposed adjacent is different.I.e. adjacent with square center stabilising arrangement is positive eight
Side shape central stabilizer device, adjacent with octagon central stabilizer device is square center stabilising arrangement.The present invention passes through
The interval in square hole and octagon hole is uniformly distributed, so that macropore and aperture are evenly distributed on whole cross section,
And by the change in location of the macropore of adjacent stabilising arrangement and aperture, so that by the fluid of macropore followed by small
Hole, by the fluid of aperture followed by macropore, further progress separates, and promotes the mixing of vapour-liquid, so that separating and exchanging heat
Effect is more preferable.
Preferably, the cross section of the heat pipe 11 is square.
It is learnt by analyzing and testing, the spacing between stabilising arrangement cannot be excessive, leads to damping noise reduction if excessive
And the effect separated is bad, and while it can not be too small, cause resistance excessive if too small, similarly, square side length is not yet
Can be too large or too small, the effect for also resulting in damping noise reduction is bad or resistance is excessive, therefore the present invention pass through it is a large amount of real
Test, preferentially meet normal flow resistance (total pressure-bearing be 2.5Mpa hereinafter, the on-way resistance of single heat pipe be less than or equal to
In the case where 5Pa/M), so that being optimal of damping noise reduction, has arranged the optimal relationship of parameters.
Preferably, the present invention is arranged on vertical flue.Heat pipe is vertical with flue extending direction.That is heat pipe and level
Direction extends.
Preferably, the distance between adjacent stable device is M1, the side length of square through-hole is C1, and heat pipe is square
Section, the side length of heat pipe square section are C2, meet following require:
M1/C2=a*Ln(C1/C2) +b
Wherein a, b are parameters, wherein 1.725 < a < 1.733,4.99 <b < 5.01.
11<C2<46mm；
1.9 < C1 < 3.2mm；
18<M1<27mm。
Further preferably, with the increase of C1/C2, a is smaller and smaller, and b is increasing.
Preferably, a=1.728, b=4.997；
Preferably, the side length C1 of square through-hole is the average value of side length and outer side length in square through-hole, heat pipe square
The side length C2 in section is the average value of side length and outer side length in heat pipe.
Preferably, the outer side length of square through-hole is equal to the interior side length of heat pipe square section.
Preferably, with the increase of C2, C1 is also continuously increased.But with the increase of C2, the ever-increasing amplitude of C1
It is smaller and smaller.This rule variation is obtained by a large amount of numerical simulation and experiment, and the variation of above-mentioned rule, Neng Goujin are passed through
One step improves heat transfer effect, reduces noise.
Preferably, with the increase of C2, M1 constantly reduces.But with the increase of C2, the ever-reduced amplitude of M1 is got over
Come smaller.This rule variation is obtained by a large amount of numerical simulation and experiment, can be into one by the variation of above-mentioned rule
Step improves heat transfer effect, reduces noise.
It is learnt by analyzing and testing, the spacing of heat pipe will also meet certain requirements, such as cannot be too large or too small,
No matter it is too large or too small all heat transfer effect can be caused bad, and because the application heat pipe in be provided with stabilising arrangement,
Also opposite heat tube spacing there are certain requirements stabilising arrangement.Therefore the present invention through a large number of experiments, meets normal flowing preferential
Resistance (total pressure-bearing be 2.5Mpa hereinafter, single heat pipe on-way resistance be less than or equal to 5Pa/M) in the case where so that damping
Being optimal of noise reduction has arranged the optimal relationship of parameters.
The distance between adjacent stable device is M1, and square side length is C1, and heat pipe is square section, the side of heat pipe
It is A that a length of C2, the heat pipe and horizontal plane, which form acute angle, and the spacing between adjacent heat tube hub is that M2 meets following require:
M2/C2=d*(M1/C2)2+e-f*(M1/C2)3-h*(M1/C2)；
Wherein d, e, f, h are parameters,
1.239<d<1.240,1.544<e<1.545,0.37<f<0.38,0.991<h<0.992。
11<C2<46mm；
1.9 < C1 < 3.2mm；
18<M1<27mm。
16<M2<76mm。
Spacing between adjacent heat tube hub is that M2 refers to the distance between heat pipe center line.
Further preferably, d=1.2393, e=1.5445, f=0.3722, h=0.9912；
Preferably, d, e, f is increasing with the increase of M1/C2, h is smaller and smaller.
Preferably, M2 is continuously increased with the increase of C2, but with the increase of C2, the ever-increasing amplitude of M2 is got over
Come smaller.This rule variation is obtained by a large amount of numerical simulation and experiment, can be into one by the variation of above-mentioned rule
Step improves heat transfer effect.
Preferably, evaporation ends (heat pipe is located at the length in flue 1) length is between 1000-1800mm.It is further excellent
It selects, between 1200-1400mm.
Preferably, condensation end length is between 500-900mm.Further preferably, between 600-700mm.
By the preferred of the optimal geometric scale of above-mentioned formula, can be realized under the conditions of meeting normal flow resistance,
Damping noise reduction reaches optimum efficiency.
For parameters such as other parameters, such as tube wall, wall thickness according to normal standard setting.
The heat pipe be it is multiple, along the flow direction of flue gas, the distribution density of the heat pipe is smaller and smaller.In numerical value
Simulation and it was found that, along flue gas flow direction, the received heat of heat pipe is smaller and smaller, and the heat pipe of different location
Temperature is also different, to cause local heating uneven.Because the temperature of flue gas is also continuous with the continuous heat exchange of flue gas
Decline, cause exchange capability of heat also declining, therefore, the present invention pass through exhaust gases passes different location be arranged heat pipe density
Difference, thus make along flow of flue gas direction, the heat absorption capacity of heat pipe constantly declines so that integral heat pipe temperature keep
It is essentially identical, to improve whole heat exchange efficiency, material is saved, avoids local damage caused by non-uniform temperature, extends heat
The service life of pipe.
Preferably, the amplitude that the distribution density of the heat pipe is smaller and smaller constantly increases along the flow direction of flue gas
Add.As the variation of heat pipe distribution density, the present invention has carried out a large amount of numerical simulation and experiment, to obtain above-mentioned heat pipe
The changing rule of distribution density.By above-mentioned changing rule, material can be saved, while 9% or so heat exchange can also be improved
Efficiency.
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 defined by the scope defined by the claims..
Claims (6)
1. a kind of flue gas in power station boiler afterheat utilizing system, including heat pipe, exhaust gases passes and air duct, the heat pipe includes steaming
Originator and condensation end, the condensation end setting is in the air passageway；Evaporation ends are arranged in exhaust gases passes；Evaporation ends absorb flue gas
The waste heat of flue gas in channel, the air in air duct is transferred heat to by condensation end；Air after preheating enters boiler
Burner hearth carries out combustion-supporting, which is characterized in that the heat pipe is more in parallel, is arranged between at least two adjacent heat pipes and flows
Pipe.
2. station boiler afterheat utilizing system as described in claim 1, which is characterized in that condensed from heat pipe evaporation ends to heat pipe
Multiple equalizer flow tubes are arranged between adjacent heat pipe in extreme direction.
3. station boiler afterheat utilizing system as claimed in claim 2, which is characterized in that in evaporation ends, from heat pipe evaporation ends
To condensation end of heat pipe direction, the distance between adjacent equalizer flow tube constantly reduces.
4. station boiler afterheat utilizing system as described in claim 1, which is characterized in that dress is stablized in setting in the heat pipe
It sets, the stabilising arrangement is laminated structure, and the laminated structure is arranged on the cross section of heat pipe；The stabilising arrangement is pros
Shape through-hole and octagon through-hole composition, the side length of the square through-hole are equal to the side length of octagon through-hole, the pros
Four of shape through-hole while be respectively four different octagon through-holes while, four of octagon through-hole apart from one another by side
It is the side of four different square through-holes respectively.
5. station boiler afterheat utilizing system as claimed in claim 4, which is characterized in that the cross section of heat pipe is square.
6. station boiler afterheat utilizing system as claimed in claim 5, which is characterized in that the distance between adjacent stable device
For M1, the side length of square through-hole is C1, and heat pipe is square section, and the side length of heat pipe square section is C2, is met as follows
It is required that:
M1/C2=a*Ln(C1/C2) +b
Wherein a, b are parameters, wherein 1.725 < a < 1.733,4.99 <b < 5.01； 11<C2<46mm；
1.9 < C1 < 3.2mm；
18<M1<27mm。
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910778644.6A CN111043882A (en) | 2018-07-20 | 2018-07-20 | Heat pipe distribution design method for power station boiler waste heat system |
| CN201810805016.8A CN109519953B (en) | 2018-07-20 | 2018-07-20 | A kind of flue gas in power station boiler afterheat utilizing system of flow equalization |
| CN201910778645.0A CN110657695A (en) | 2018-07-20 | 2018-07-20 | Design method of condensation end of heat pipe of power station boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810805016.8A CN109519953B (en) | 2018-07-20 | 2018-07-20 | A kind of flue gas in power station boiler afterheat utilizing system of flow equalization |
Related Child Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910778645.0A Division CN110657695A (en) | 2018-07-20 | 2018-07-20 | Design method of condensation end of heat pipe of power station boiler |
| CN201910778644.6A Division CN111043882A (en) | 2018-07-20 | 2018-07-20 | Heat pipe distribution design method for power station boiler waste heat system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109519953A true CN109519953A (en) | 2019-03-26 |
| CN109519953B CN109519953B (en) | 2019-09-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910778645.0A Pending CN110657695A (en) | 2018-07-20 | 2018-07-20 | Design method of condensation end of heat pipe of power station boiler |
| CN201810805016.8A Expired - Fee Related CN109519953B (en) | 2018-07-20 | 2018-07-20 | A kind of flue gas in power station boiler afterheat utilizing system of flow equalization |
| CN201910778644.6A Pending CN111043882A (en) | 2018-07-20 | 2018-07-20 | Heat pipe distribution design method for power station boiler waste heat system |
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| CN201910778645.0A Pending CN110657695A (en) | 2018-07-20 | 2018-07-20 | Design method of condensation end of heat pipe of power station boiler |
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| CN201910778644.6A Pending CN111043882A (en) | 2018-07-20 | 2018-07-20 | Heat pipe distribution design method for power station boiler waste heat system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110285589A (en) * | 2019-06-25 | 2019-09-27 | 山东建筑大学 | A kind of solar air heating device |
| CN112393633A (en) * | 2019-08-12 | 2021-02-23 | 青岛佰腾科技有限公司 | Loop heat pipe system with variable pipe diameter of heat release pipe group |
| CN112393634A (en) * | 2019-08-12 | 2021-02-23 | 青岛佰腾科技有限公司 | Waste heat utilization loop heat pipe system |
| CN113531506A (en) * | 2020-04-14 | 2021-10-22 | 山东大学 | Solar steam system for balancing pressure |
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| CN110285589A (en) * | 2019-06-25 | 2019-09-27 | 山东建筑大学 | A kind of solar air heating device |
| CN111256373A (en) * | 2019-06-25 | 2020-06-09 | 山东建筑大学 | Solar air heating device with variable interval of heat release pipe sets |
| CN111256374A (en) * | 2019-06-25 | 2020-06-09 | 山东建筑大学 | Solar air heating device with heat release pipe groups distributed in staggered manner |
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| CN112393633B (en) * | 2019-08-12 | 2022-01-28 | 中北大学 | Loop heat pipe system with variable pipe diameter of heat release pipe group |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN109519953B (en) | 2019-09-13 |
| CN110657695A (en) | 2020-01-07 |
| CN111043882A (en) | 2020-04-21 |
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