CN110529872A - Station boiler afterheat utilizing system based on entrance flue gas temperature communication control - Google Patents
Station boiler afterheat utilizing system based on entrance flue gas temperature communication control Download PDFInfo
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- CN110529872A CN110529872A CN201810819057.2A CN201810819057A CN110529872A CN 110529872 A CN110529872 A CN 110529872A CN 201810819057 A CN201810819057 A CN 201810819057A CN 110529872 A CN110529872 A CN 110529872A
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- air preheater
- storage device
- valve
- heat
- thermal storage
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- 239000003546 flue gas Substances 0.000 title claims abstract description 91
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 87
- 238000004891 communication Methods 0.000 title description 3
- 238000003860 storage Methods 0.000 claims abstract description 78
- 239000002918 waste heat Substances 0.000 claims abstract description 17
- 239000000779 smoke Substances 0.000 claims abstract description 13
- 238000009825 accumulation Methods 0.000 claims abstract description 9
- 230000003019 stabilising effect Effects 0.000 claims description 48
- 238000009833 condensation Methods 0.000 claims description 41
- 230000005494 condensation Effects 0.000 claims description 41
- 238000001704 evaporation Methods 0.000 claims description 40
- 230000008020 evaporation Effects 0.000 claims description 40
- 239000007789 gas Substances 0.000 claims description 28
- 238000001514 detection method Methods 0.000 claims description 18
- 230000009467 reduction Effects 0.000 claims description 9
- 238000005259 measurement Methods 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 6
- 238000010025 steaming Methods 0.000 claims 1
- 239000012530 fluid Substances 0.000 description 38
- 238000011144 upstream manufacturing Methods 0.000 description 29
- 230000000694 effects Effects 0.000 description 25
- 239000007788 liquid Substances 0.000 description 23
- 238000012546 transfer Methods 0.000 description 20
- 238000009826 distribution Methods 0.000 description 19
- 238000000034 method Methods 0.000 description 19
- 239000012071 phase Substances 0.000 description 17
- 238000002474 experimental method Methods 0.000 description 16
- 230000008569 process Effects 0.000 description 15
- 239000003517 fume Substances 0.000 description 11
- 238000004088 simulation Methods 0.000 description 9
- 238000010521 absorption reaction Methods 0.000 description 8
- 230000008859 change Effects 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
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- 235000019504 cigarettes Nutrition 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 5
- 238000013016 damping Methods 0.000 description 5
- 239000007791 liquid phase Substances 0.000 description 5
- 230000011218 segmentation Effects 0.000 description 5
- 239000002699 waste material Substances 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 4
- 238000004064 recycling Methods 0.000 description 4
- 230000001154 acute effect Effects 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 229910052738 indium Inorganic materials 0.000 description 3
- 230000006641 stabilisation Effects 0.000 description 3
- 238000011105 stabilization Methods 0.000 description 3
- 239000003381 stabilizer Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000005514 two-phase flow Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L15/00—Heating of air supplied for combustion
- F23L15/04—Arrangements of recuperators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N3/00—Regulating air supply or draught
- F23N3/002—Regulating air supply or draught using electronic means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N3/00—Regulating air supply or draught
- F23N3/06—Regulating air supply or draught by conjoint operation of two or more valves or dampers
-
- 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
- F28D15/04—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 with tubes having a capillary structure
- F28D15/046—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 with tubes having a capillary structure characterised by the material or the construction of the capillary structure
-
- 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
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D21/0001—Recuperative heat exchangers
- F28D21/0003—Recuperative heat exchangers the heat being recuperated from exhaust gases
- F28D21/001—Recuperative heat exchangers the heat being recuperated from exhaust gases for thermal power plants or industrial processes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L2900/00—Special arrangements for supplying or treating air or oxidant for combustion; Injecting inert gas, water or steam into the combustion chamber
- F23L2900/15043—Preheating combustion air by heat recovery means located in the chimney, e.g. for home heating devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2900/00—Special features of, or arrangements for controlling combustion
- F23N2900/05005—Mounting arrangements for sensing, detecting or measuring devices
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Abstract
The present invention provides the station boiler afterheat utilizing systems that a kind of intelligent control utilizes waste heat, the system comprises air preheaters and thermal storage device, the system also includes central controllers, the central controller and air preheater valve and thermal storage device valve carry out data connection, third temperature sensor is arranged at the position of the smoke inlet of air preheater, and central controller automatically controls the valve opening of air preheater valve and thermal storage device valve according to the temperature that third temperature sensor detects.The present invention passes through above-mentioned operation, it can be when flue-gas temperature be high, after the air generation demand for meeting preheating, extra heat is subjected to heat accumulation by thermal storage device, when flue-gas temperature is low, more flue gases can be entered and be used for preheated air in air preheater, ensure that the demand of the air of preheating, while energy saving.
Description
Technical field
The present invention is a portion for the project researched and developed jointly with enterprise, is the improvement to front earlier application,
It is related to heat pipe waste heat recycling field, utilizes heat pipe Mist heat recovering control method and device more particularly to a kind of.
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.
Heat pipe heat exchanging fluid in heat exchange is all steam water interface.Heat pipe inevitably carries in evaporation process
In liquid to steam end, simultaneously as the exothermic condensation of condensation end, so that there are liquid in condensation end, liquid can not also be kept away
That exempts from mixes with steam, so that the fluid in heat pipe is liquid-vapor mixture, liquid-vapor mixture, which exists, causes steam to blend together one
Group, exchange capability of heat declines between liquid, greatly affects the efficiency of heat exchange.
In the boiler waste heat utilization system of the prior art, lack research for intelligentized control method, more particularly, to simultaneously
There are intelligent controls in the case where multiple waste heat utilization equipments, such as setting heat distribution etc..
In view of the above-mentioned problems, the present invention is improved on the basis of invention in front, a kind of new intelligence control is provided
The device for utilizing waste of boiler of structure processed makes full use of heat source, reduces energy consumption, realizes intelligent control.
Summary of the invention
In view of the above-mentioned problems, the present invention is improved on the basis of invention in front, a kind of new structure pot is provided
Furnace waste heat utilization equipment, with realize waste heat make full use of and its intelligent control.
To achieve the goals above, technical scheme is as follows:
A kind of station boiler afterheat utilizing system, the system comprises air preheater and thermal storage device, the air preheat
Device is arranged on the main pipeline of flue, and the thermal storage device is arranged in secondary duct, and the main pipeline and secondary duct form parallel transistor
Road, the flue gas in flue respectively enter the air preheater and thermal storage device of main pipeline and secondary duct, generate in air preheater
Steam carries out heat accumulation in thermal storage device, and the flue gas after exchanging heat in air preheater and thermal storage device converges again into flue；
The position of the entrance of the air preheater of flue collector is arranged in air preheater valve, pre- into air for controlling
The position of the inlet tube of the thermal storage device of secondary duct is arranged in the flow of the flue gas of hot device, thermal storage device valve, enters storage for controlling
The flow of the flue gas of hot device, the system also includes central controller, the central controller and air preheater valve and storage
Hot device valve carries out data connection, and third temperature sensor is arranged at the position of the smoke inlet of air preheater, for surveying
Amount enters the temperature of the flue gas of air preheater；Third temperature sensor and central controller carry out data connection, center control
Device automatically controls the valve opening of air preheater valve and thermal storage device valve according to the temperature that third temperature sensor detects.
Preferably, when the temperature of third temperature sensor measurement is lower than certain temperature, central controller control
Air preheater valve processed increases aperture, while controlling thermal storage device valve and reducing aperture, to increase the cigarette for entering air preheater
The flow of gas；When the temperature of third temperature sensor measurement is higher than certain temperature, central controller controls air is pre-
Hot device valve reduces aperture, while controlling thermal storage device valve and increasing aperture, to reduce the flow for the flue gas for entering air preheater.
Preferably, if the temperature of the first temperature sensor detection is lower than the temperature of second temperature sensor detection,
Central controller controls blower is out of service.If the temperature of the first temperature sensor detection is detected higher than second temperature sensor
Temperature, then central controller controls blower brings into operation.
Preferably, central controller automatically controls blower and stops when central controller detects that pipeline has flue gas to pass through
Only run；When central controller detects that pipeline does not have flue gas to pass through, central controller controls upstream valve, valve downstream
It closes, the pipeline where air preheater and thermal storage device forms a circulation line, and central controller automatically controls blower and starts
Operation.
Preferably, the air preheater includes heat pipe, exhaust gases passes and air duct, the heat pipe includes evaporation ends
And condensation end, in the air passageway, evaporation ends are arranged in flue for the condensation end setting；Evaporation ends absorb cigarette in boiler flue
The waste heat of gas transfers heat to the air in air duct by condensation end, and the air after preheating enters boiler furnace progress
It is combustion-supporting.
Preferably, stabilising arrangement is arranged in the thermal-collecting tube, the stabilising arrangement is laminated structure, the laminated structure
It is arranged on the cross section of thermal-collecting tube；The stabilising arrangement is square through-hole and octagon through-hole composition, the square
The side length of through-hole is equal to the side length of octagon through-hole, and four of the square through-hole are when being respectively four different positive eight
The side of shape through-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 thermal-collecting tube is square.
Preferably, the distance between adjacent stable device is K1, square side length is B1, and heat pipe, which is square, to be cut
Face, the side length of heat pipe are B2, and it is A that the heat pipe and horizontal plane, which form acute angle, and the spacing between adjacent heat tube hub is K2 satisfaction
It is following to require:
C*K2/B2=d* (K1/B2)2+e-f*(K1/B2)3-h*(K1/B2)；
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；C=1/cos (A)n,
In 0.090 < n < 0.098, preferably n=0.093.
11<B2<46mm；
1.9<B1<3.2mm；
18<K1<27mm。
16<K2<76mm。
Compared with prior art, the present invention has the advantage that:
1) present invention can generate need in the air for meeting preheating when flue-gas temperature is high by above-mentioned operation
After asking, extra heat is carried out heat accumulation by thermal storage device can enter more flue gases when flue-gas temperature is low
It is used for preheated air in air preheater, ensure that the demand of the air of preheating, while energy saving.
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
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 air preheater of the present invention.
Fig. 2 is the schematic diagram of flue gas waste heat utilization device intelligent control of the present invention.
Fig. 3 stabilising arrangement cross-sectional structure schematic diagram of the present invention；
Another cross-sectional structure schematic diagram of Fig. 4 stabilising arrangement of the present invention；
Fig. 5 is stabilising arrangement of the present invention arrangement schematic diagram in heat pipe；
Fig. 6 is that stabilising arrangement of the present invention arranges cross-sectional view in heat pipe；
Fig. 7 is the cross-sectional view of heat pipe setting equalizer flow tube of the present invention.
Fig. 8 is the flue gas waste heat utilization device structural schematic diagram of present invention setting by-pass flue.
In figure: 1 air preheater, 2 thermal storage devices, 3 central controllers, 4 stabilising arrangements, 5 air preheater valves, 6 upstreams
Valve, 7 valve downstreams, 8 air outlet slits, 9 air intlets, 10- heat pipe, 11 shells, 12 main pipelines, 13 secondary ducts, 14 flues, 15
Bypath valve, 16 air ducts, 17 thermal storage device valves, 18 equalizer flow tubes
Specific embodiment
Specific embodiments of the present invention will be described in detail with reference to the accompanying drawing.
Herein, if without specified otherwise, it is related to formula, "/" indicates that division, "×", " * " indicate multiplication.
Specific embodiments of the present invention will be described in detail with reference to the accompanying drawing.
A kind of station boiler flue gas residual heat utilizes system, and the afterheat utilizing system includes air preheater 1, described
Air preheater 1 includes heat pipe 10, exhaust gases passes 14 and air duct 16, and the heat pipe 10 includes evaporation ends 101 and condensation end
102, the condensation end 102 is arranged in air duct 12, and evaporation ends 101 are arranged in flue.Evaporation ends 101 absorb boiler smoke
The waste heat of flue gas in road transfers heat to the air in air duct 12 by condensation end 102.Air after preheating enters pot
Furnace burner hearth carries out combustion-supporting.
Heat pipe of the present invention absorbs heat in operation, by evaporation ends 101 from flue gas, then releases heat in condensation end
It puts to air, fluid is condensed, and enters back into evaporation ends 101 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.
As a kind of selection, as shown in figure 8, equalizer flow tube 18 is arranged between the heat pipe.At least two adjacent heat pipes 10
Between be arranged equalizer flow tube 18.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 10, will lead to part heat pipe 10 in this way
Temperature is excessively high, causes the lost of life, once heat pipe 10 goes wrong, may cause entire afterheat utilizing system and is not available
The problem of.Equalizer flow tube 18 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 10 that pressure can be made big quickly flows to the small heat pipe 10 of pressure, thus
It keeps integral pressure balanced, avoids hot-spot or supercooling.
Preferably, condensing extreme direction from 10 evaporation ends of heat pipe to heat pipe 10, it is arranged between adjacent heat pipe 10 multiple equal
Flow tube 18.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 101, condense extreme direction from 10 evaporation ends of heat pipe to heat pipe 10, adjacent equalizer flow tube 18 it
Between 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 by above-mentioned setting, can
Guarantee to reach pressure equilibrium as soon as possible in process fluid flow.
Preferably, in evaporation ends 101, extreme direction is condensed from 10 evaporation ends of heat pipe to heat pipe 10, 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, the diameter of equalizer flow tube 18 from 10 evaporation ends of heat pipe to heat pipe 10 in evaporation ends 101
It is continuously increased.This purpose is to be arranged and guarantee bigger connection area, because of flowing up with fluid, fluid is continuous
Heat absorption generates steam, and with the continuous bad student of steam, the temperature, pressure in different heat pipes is more and more uneven, therefore by above-mentioned
Setting can guarantee to reach pressure equilibrium as soon as possible in process fluid flow.
Preferably, condensing extreme direction, the diameter of equalizer flow tube 18 from 10 evaporation ends of heat pipe to heat pipe 10 in evaporation ends 101
Ever-increasing amplitude is increasing.Be found through experiments that, above-mentioned setting, can guarantee in process fluid flow it is more excellent faster
Reach pressure equilibrium.This is also the optimal mode of communicating got and largely studying pressure changes in distribution rule.
Preferably, in condensation end 102, condense extreme direction from 10 evaporation ends of heat pipe to heat pipe 10, adjacent equalizer flow tube 18 it
Between distance be continuously increased.This purpose is to reduce cost in order to which less equalizer flow tube is arranged.Because under condensation end 102
Portion is upward, the continuous exothermic condensation of steam in heat pipe, and with the continuous heat release of fluid, the pressure in heat pipe is smaller and smaller, therefore
Non-uniform phenomenon also increasingly mitigates, therefore by above-mentioned setting, can save material, is flowed according to pressure change setting
Pipe can guarantee to reach pressure equilibrium as soon as possible in process fluid flow.
Preferably, in condensation end 102, extreme direction is condensed from 10 evaporation ends of heat pipe to heat pipe 10, 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, the diameter of equalizer flow tube 18 from 10 evaporation ends of heat pipe to heat pipe 10 in condensation end 102
Constantly reduce.This purpose is to reduce cost to be arranged and guarantee reduced connection area.With front apart from ever-increasing principle
It is identical.
Preferably, condensing extreme direction, the diameter of equalizer flow tube 18 from 10 evaporation ends of heat pipe to heat pipe 10 in condensation end 102
The amplitude constantly reduced is increasing.Be found through experiments that, above-mentioned setting, can guarantee in process fluid flow it is more excellent faster
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 10；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) stabilization of the Novel structure combined the present invention provides a kind of new-type square through-hole and octagon through-hole
Device, 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 big
In being equal to 90 degree, so that fluid can sufficiently flow through each position in each hole, the short of fluid flowing is avoided or reduced
Road.Two-phase fluid is separated into liquid and gas by the stabilising arrangement of Novel structure by the present invention, and 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 the role of regime flow, has and subtracts
The effect of vibration noise reduction, improves heat transfer effect.Stabilising arrangement in compared with the existing technology further increases steady flow result, strengthens
Heat transfer, and be 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, as shown in figures 3 and 4, 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 4.Second is octagon central stabilizer dress
It sets, octagon is located at the center of heat pipe or condenser pipe, as shown in Figure 3.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 10 is square.
Preferably, the multiple stabilising arrangements of setting in evaporation ends, in evaporation ends 101, from 10 evaporation ends of heat pipe to heat pipe 10
Extreme direction is condensed, the spacing between stabilising arrangement constantly becomes smaller.If the distance of the evaporation ends end apart from heat pipe is H, adjacent
Spacing between stabilising arrangement is S, S=F1(H), i.e. S is using height H as the function of variable, and S ' is the first order derivative of S, is met
It is following to require:
S'<0；
Main cause is because hot liquid in pipe is constantly heated to generate steam, and in uphill process, steam is constantly more next
It is more, 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, changing in heat pipe
Thermal energy power can increase with vapour phase and weaken relatively, and vibration and its noise also can constantly increase as vapour phase increases.Therefore
The distance between the adjacent stable device for needing to be arranged is shorter and shorter.
It is found through experiments that, by above-mentioned setting, can both reduce vibration and noise to the full extent, while can mention
High heat transfer effect.
Further preferably, in evaporation ends 101, extreme direction, adjacent stable device are condensed from 10 evaporation ends of heat pipe to heat pipe 10
The distance between shorter and shorter amplitude be continuously increased.That is S " is the second derivative of S, meets following require:
S">0；
It is found through experiments that, by being improved simultaneously so set, 7% or so vibration and noise can be further decreased
8% or so heat transfer effect.
Preferably, the multiple stabilising arrangements of setting in evaporation ends 101, in evaporation ends 101, from 10 evaporation ends of heat pipe to heat pipe
10 condensation extreme directions, square side length are smaller and smaller.The distance of lower end apart from heat pipe is H, and square side length is C, C=
F2(H), C ' is the first order derivative of C, meets following require:
C'<0；
Further preferably, in evaporation ends 101, extreme direction, square side length are condensed from 10 evaporation ends of heat pipe to heat pipe 10
Smaller and smaller amplitude constantly increases.C " is the second derivative of C, meets following require:
C”>0。
Specific reason changes referring to front stabilising arrangement spacing.
Preferably, the distance between adjacent stable device remains unchanged.
Preferably, the multiple stabilising arrangements of setting in condensation end, in condensation end 102, since 102 entrance of condensation end (i.e.
Since heat pipe 10 protrudes into the position of air duct) to condensation end end, the spacing between stabilising arrangement is continuously increased.If distance
The distance for protruding into the position of air duct from heat pipe 10 is H, and the spacing between adjacent stable device is S, S=F1(H), i.e., S is
Using height H as the function of variable, S ' is the first order derivative of S, meets following require:
S'>0；
Main cause is because steam constantly condenses in uphill process in condensation end, and steam is constantly fewer and fewer, leads
Cause the steam in biphase gas and liquid flow fewer and fewer, because the vapour phase in stream-liquid two-phase flow is fewer and fewer.Therefore the phase for needing to be arranged
The distance between adjacent stabilising arrangement is increasingly longer, in this way, cost can be further saved, achievees the effect that essentially identical, reduction
Flow resistance.
It is found through experiments that, by above-mentioned setting, can both reduce vibration and noise to the full extent, while can mention
High heat transfer effect.
Further preferably, in condensation end 102, (position of air duct is protruded into from heat pipe 10 since 102 entrance of condensation end
Set beginning) to condensation end end, the amplitude that the distance between adjacent stable device is increasingly grown is continuously increased.That is S " is the two of S
Subderivative meets following require:
S">0；
It is found through experiments that, by so set, 7% or so resistance can be further decreased, while reaching basic phase
Same heat transfer effect.
Preferably, the multiple stabilising arrangements of setting in condensation end 102, in condensation end 102, since 102 entrance of condensation end
(i.e. since heat pipe 10 protrudes into the position of air duct) to condensation end end, square side length is increasing.If distance from
The distance that heat pipe 10 protrudes into the position of water tank is H, and square side length is C, C=F2(H), C ' is the first order derivative of C, is met such as
Lower requirement:
C'>0；
Further preferably, upward from the lower end of heat pipe in condensation end 102, the increasing amplitude of square side length is not
Disconnected increase.C " is the second derivative of C, meets following require:
C”>0。
Specific reason changes referring to front stabilising arrangement spacing.
Preferably, the distance between adjacent stable device remains unchanged.
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 and flue extending direction are at an angle.That is heat pipe
At an angle with level.
Preferably, the distance between adjacent stable device is K1, the side length of square through-hole is B1, and heat pipe is square
Section, the side length of heat pipe square section are B2, and it is A that the heat pipe and horizontal plane, which form acute angle, meet following require:
C*K1/B2=a*Ln (B1/B2)+b
Wherein a, b are parameters, wherein 1.725 < a < 1.733,4.99 <b < 5.01；C=1/cos (A)m, wherein 0.085 < m <
0.095, preferably m=0.090.
11<B2<46mm；
1.9<B1<3.2mm；
18<K1<27mm。
0°<A<50°。
Preferably, 0 ° < A < 25 °.
Further preferably, with the increase of B1/B2, a is smaller and smaller, and b is increasing.
Preferably, a=1.728, b=4.997；
Preferably, the side length B1 of square through-hole is the average value of side length and outer side length in square through-hole, heat pipe is just
The side length B2 of square-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.
With the increase of A, m is smaller and smaller.
Preferably, with the increase of B2, B1 is also continuously increased.But with the increase of B2, the ever-increasing amplitude of B1
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 B2, K1 constantly reduces.But with the increase of B2, the ever-reduced amplitude of K1 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 K1, and square side length is B1, and heat pipe is square section, the side of heat pipe
It is A that a length of B2, the heat pipe and horizontal plane, which form acute angle, and the spacing between adjacent heat tube hub is that K2 meets following require:
C*K2/B2=d* (K1/B2)2+e-f*(K1/B2)3-h*(K1/B2)；
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；C=1/cos (A)n,
In 0.090 < n < 0.098, preferably n=0.093.
11<B2<46mm；
1.9<B1<3.2mm；
18<K1<27mm。
16<K2<76mm。
Spacing between adjacent heat tube hub is that K2 refers to the distance between heat pipe center line.
With the increase of A, n is smaller and smaller.
0°<A<50°。
Preferably, 0 ° < A < 25 °.
Further preferably, d=1.2393, e=1.5445, f=0.3722, h=0.9912；
Preferably, d, e, f is increasing with the increase of K1/B2, h is smaller and smaller.
Preferably, K2 is continuously increased with the increase of B2, but with the increase of B2, the ever-increasing amplitude of K2 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 can also be improved and changed
The thermal efficiency.
Preferably, the diameter and length of each heat pipe 10 are identical.
Preferably, the length for being distributed the flue of heat pipe is C, along flow of flue gas direction, cigarette along flow of flue gas direction
The density of the heat pipe 10 of the tail portion of road rearmost end is MTail, then apart from 10 tail portion of heat pipe distance be the position l heat pipe density M rule such as
Under: M=b*MTail+c*MTail*(l/C)a, wherein a, b, c are coefficients, meet following require:
1.083 < a < 1.127,0.982 <b+c < 1.019,0.483 <b < 0.648.
Preferably, a is gradually reduced as l/C increases.
Preferably, 1.09 < a < 1.11, b+c=1,0.543 <b < 0.578；
The formula of above-mentioned optimization is obtained with numerical simulation through a large number of experiments, enables to point of the heat pipe of heat pipe
The distribution of cloth being optimal of density, can uniform heat distribution, good effect of heat exchange on the whole, while material can be saved.Make
To be preferred, the setting of vertical portion 101 is in the air passageway.By warmed up air passage, so that the air of heating is directly used
In burning.
Preferably, the heat pipe be it is multiple, along the flow direction of flue gas, the caliber of the heat pipe is smaller and smaller.
Numerical simulation and it was found that, along flue gas flow direction, the received heat of heat pipe is smaller and smaller, and different location
The temperature of heat pipe is also different, to cause local heating uneven.Since with the continuous heat exchange of flue gas, the temperature of flue gas
Constantly declining, exchange capability of heat is caused also to decline, therefore, heat pipe is arranged by the different location in exhaust gases passes in the present invention
Caliber it is different, thus make along flow of flue gas direction, the heat absorption capacity of heat pipe constantly declines, so that overall thermal tube temperature
Degree keeps essentially identical, to improve whole heat exchange efficiency, saves material, avoids local damage caused by non-uniform temperature,
Extend the service life of heat pipe.
Preferably, the amplitude that the caliber of the heat pipe is smaller and smaller constantly increases along the flow direction of flue gas.Make
For the variation of heat pipe caliber, the present invention has carried out a large amount of numerical simulation and experiment, to obtain the change of above-mentioned heat pipe caliber
Law.By above-mentioned changing rule, material can be saved, while 8% or so heat exchange efficiency can also be improved.
Preferably, the distribution density and length of all heat pipes 10 are all identical.
Along flow of flue gas direction, the length for being distributed the flue of heat pipe is C, along flow of flue gas direction, flue rearmost end,
That is the caliber of the heat pipe of heat pipe tail portion is DTail, then apart from heat pipe tail portion, distance is that the heat pipe caliber D rule of the position l is as follows:
D2=b* (DTail)2+c*(DTail)2*(l/C)a, wherein a, b, c are coefficients, meet following require:
1.085 < a < 1.125,0.985 <b+c < 1.015,0.485 <b < 0.645.
Preferably, a is gradually reduced as l/C increases.
Preferably, 1.093 < a < 1.106, b+c=1,0.548 <b < 0.573；
The formula of above-mentioned optimization is obtained with numerical simulation through a large number of experiments, enables to the distribution density of heat pipe
The distribution for being optimal, can uniform heat distribution, good effect of heat exchange on the whole, while material can be saved.
Preferably, the length that the condensation end extends to air duct is smaller and smaller along flow of flue gas direction.
Preferably, the length that the condensation end extends to air duct is smaller and smaller along the flow direction of flue gas
Amplitude constantly increases.The variation of above-mentioned rule and the distribution density diameter change of front are similar, are all in the stream along flue gas
Dynamic direction, reduces heat exchange area, so that along flow of flue gas direction, the heat absorption capacity of condenser pipe constantly declines, to be applicable in heat exchange
Quantity is gradually reduced.
Further preferably, as shown in Figure 1, afterheat utilizing system includes thermal storage device 2, exhaust gases passes include main pipeline 12 and pair
Pipeline 13.Heat pipe is arranged on the main pipeline 12 of flue.The thermal storage device 2 is arranged in secondary duct 13,12 He of main pipeline
Secondary duct 12 forms parallel pipeline.Flue gas in flue 14 respectively enters 1 He of air preheater of main pipeline 12 and secondary duct 13
Thermal storage device 2 carries out heat accumulation by heat pipes heat air in thermal storage device 2, after exchanging heat in air preheater 1 and thermal storage device 2
Flue gas converges again into main chimney flue.
In above system, while heating air by fume afterheat, it can use thermal storage device and carry out heat accumulation.
As shown in Figure 1, the system comprises thermal storage device valves 17 and air preheater valve 5, upstream valve 6 and downstream valve
Door 7, upstream valve 6 is arranged on the flue 14 of 2 upstream of air preheater 1 and thermal storage device, enters air preheater 1 for controlling
With total flue gas flow of thermal storage device 2, valve downstream 7 is arranged on the flue 14 in 2 downstream of air preheater 1 and thermal storage device, empty
The position of the entrance of the air preheater 1 of flue collector 12 is arranged in air preheater valve 5, enters air preheater 1 for controlling
Flue gas flow, the position of the inlet tube of the thermal storage device 2 of secondary duct 13 is arranged in thermal storage device valve 17, enters storage for controlling
The flow of the flue gas of hot device 2, the system also includes central controller, the central controller and thermal storage device valve 17, air
Preheater valve 5 carries out communication data with upstream valve 6, valve downstream 7 and connects.The central controller controls thermal storage device valve
17, the size of air preheater valve 5 and upstream valve 6, the opening and closing of valve downstream 7 and aperture, to control into air
The exhaust gas volumn of preheater 1 and thermal storage device 2.
Preferably, as shown in figure 8, the system also sets up the by-pass line connecting with flue 14, the by-pass line
It is located at the upstream of upstream valve 6 with the link position of flue 14, bypath valve 15 is set on the by-pass line.The by-passing valve
Door 15 and 3 data connection of central controller.The opening and closing of bypath valve 15 can guarantee whether flue gas passes through air preheater 1 and storage
Hot device 2.
Preferably, the bypath valve 15 is opened, upstream valve 6 and valve downstream 7 are closed.
(1) according to the opening and closing of flow of flue gas control valve
Preferably, smoke detectors are arranged in the flue 14 of 6 upstream of upstream valve, smoke detectors are for detecting
Whether there is flue gas to flow through in flue.The smoke detectors and central controller carry out data connection, and central controller is according to cigarette
The data of road sensor detection control the opening and closing of upstream valve 6 and valve downstream.
When central controller detects that flue 14 has flue gas to pass through, for example, boiler operation when, central controller
Control upstream valve 6, valve downstream 7 are opening state, and flue gas can enter air preheater 1 and thermal storage device 2, after the completion of heat exchange
It discharges fume.When central controller detects that flue 14 passes through without flue gas, such as when boiler is out of service, central controller
Control upstream valve 6, valve downstream 7 is closed, pipeline one circulation line of formation where air preheater 1 and thermal storage device 2.This
The heat accumulation of Shi Liyong thermal storage device 2 heats air preheater 1, thus preheated air.By above-mentioned operation, there can be flue gas
When, in the case where meeting the air capacity of preheating of the generation of air preheater 1, the heat being more than is stored in thermal storage device 2
In, in the case where no fume afterheat, air preheater 1 is heated using the heat of fume afterheat storage, to meet air
The real work demand of preheater 1.Fume afterheat can be made full use of in this way, avoid the waste of excessive heat.
Preferably, the bypath valve 15 is opened, upstream valve 6 and valve downstream 7 are closed.
Preferably, central controller controls bypath valve 15 is closed when smoke detectors detect flue gas, on
It swims valve 6 and valve downstream 7 is opened.
Preferably, central controller controls bypath valve 15 is beaten when smoke detectors, which detect, does not have flue gas
It opens, upstream valve 6 and valve downstream 7 are closed.
(2) operation of closed cycle system blower is controlled according to flow of flue gas
Preferably, blower is arranged in the secondary duct 13, it to be used for the upstream valve 6 in the case where no fume afterheat
There is the closing of valve 7 under, by the operation of blower so that the pipeline where air preheater 1 and thermal storage device 2 forms a circulation
Pipeline.
Preferably, the blower and central controller carry out data connection, the central controller 3 is sensed according to flue
The data of device monitoring automatically control the operation of blower.
When central controller detects that pipeline has flue gas to pass through, it is out of service that central controller automatically controls blower.When
When central controller detects that pipeline does not have flue gas to pass through, central controller automatically controls blower and brings into operation.Pass through control
The intelligent operation of blower can realize the intelligent control of fan operation according to the actual situation, improve the intelligence of system.
(3) operation of control blower is detected according to two temperature
Preferably, the first temperature sensor is arranged in the thermal storage device 2, for detecting the temperature of heat accumulating in thermal storage device
Degree.Second temperature sensor is set in the air preheater, for detecting the temperature of air in air preheater 1.Described
One temperature sensor and second temperature sensor and 3 data connection of central controller.Upstream valve 6 has the closing of valve 7, institute under
State the operation for the temperature automatic control blower that central controller 3 is detected according to the first temperature sensor and second temperature sensor.
If the temperature of the first temperature sensor detection is lower than the temperature of second temperature sensor detection, central controller
3 control blowers are out of service.If the temperature of the first temperature sensor detection is higher than the temperature of second temperature sensor detection,
Central controller 3 controls blower and brings into operation.
The operation that blower is controlled by the temperature of detection may be implemented independently to heat air preheater.Because grinding
It is found in hair and experimentation, in the case that the heat of thermal storage device is gradually finished, it may appear that the gas that thermal storage device comes out
Temperature reuses thermal storage device in such cases lower than the temperature of the air in air preheater 1 come to heat air preheater be not
Possible, the heat that may result in air preheater instead is pulled away.Therefore by controlling wind according to the temperature intelligent of detection
The operation of machine, so that the circulation of intelligent control thermal storage device 2 and air preheater 1, improves air preheat effect.
(4) according to the aperture of air preheater entrance flue gas temperature control valve
Preferably, third temperature sensor is arranged at the position of the smoke inlet of air preheater 1, for measure into
Enter the temperature of the flue gas of air preheater.Third temperature sensor and central controller 3 carry out data connection, central controller root
The valve opening of air preheater valve 5 and thermal storage device valve 17 is automatically controlled according to the temperature of third temperature sensor detection.
Preferably, when the temperature of third temperature sensor measurement is lower than certain temperature, central controller controls
Valve 5 increases aperture, while control valve 17 reduces aperture, to increase the flow for the flue gas for entering air preheater 1.Work as third
When the temperature of temperature sensor measurement is higher than certain temperature, central controller controls valve 5 reduces aperture, controls simultaneously
Valve 17 increases aperture, to reduce the flow for the air for entering air preheater 1.
When the temperature of third temperature sensor measurement is as low as certain temperature, 1 preheated air of air preheater at this time
Ability can be deteriorated, be unable to satisfy normal demand, it is therefore desirable to which more flue gases heat air preheater, to preheat sky
Gas.
, can be when flue-gas temperature be high, after the air generation demand for meeting preheating by above-mentioned operation, it will
Extra heat, which carries out heat accumulation by thermal storage device, can enter air preheat for more flue gases when flue-gas temperature is low
It is used for preheated air in device, ensure that the demand of the air of preheating, while energy saving.
(5) according to the opening and closing of flue-gas temperature control valve
Preferably, the 4th temperature sensor, the 4th temperature sensor are arranged in the flue 14 of 6 upstream of upstream valve
For detecting flue gas in flue temperature.4th temperature sensor and central controller carry out data connection, central controller
The opening and closing of upstream valve 6, valve downstream 7 is controlled according to the data of the 4th temperature sensor detection.
When central controller detects that flue 14 has temperature to be more than certain temperature, for example, boiler is when operation
Start that high-temperature flue gas is discharged, central controller controls upstream valve 6, valve downstream 7 are opening state, and flue gas can enter air
Preheater 1 and thermal storage device 2 are discharged fume after the completion of heat exchange.Central controller detects 14 flue-gas temperature of flue lower than certain temperature
When spending, such as when boiler is out of service, or because the UTILIZATION OF VESIDUAL HEAT IN of front causes flue-gas temperature relatively low, in order to avoid low
Temperature corrosion can not utilize waste heat, and central controller controls upstream valve 6, valve downstream 7 are closed, air preheater
1 and thermal storage device 2 where pipeline form a circulation line.Air preheater 1 is heated using the heat accumulation of thermal storage device 2 at this time,
To preheated air.By above-mentioned operation, air preheater 1 can met when having flue-gas temperature to meet the requirements
In the case where the air capacity of the preheating of generation, the heat being more than is stored in thermal storage device 2, is not having the case where fume afterheat
Under, air preheater 1 is heated using the heat of fume afterheat storage, to meet the real work demand of air preheater 1.This
Sample can make full use of fume afterheat, avoid the waste of excessive heat.
Preferably, when smoke detectors are detected more than certain temperature, central controller controls bypath valve
15 close, and upstream valve 6 and valve downstream 7 are opened.
Preferably, when smoke detectors detect temperature lower than certain temperature, central controller controls bypass
Valve 15 is opened, and upstream valve 6 and valve downstream 7 are closed.
(6) operation of closed cycle system blower is controlled according to flow of flue gas
The present embodiment is improvement on the basis of (five) embodiment.
Preferably, blower is arranged in the secondary duct 13, in the case that the flue-gas temperature of pipeline 14 is lower than centainly, pass through
The operation of blower is so that the pipeline where air preheater 1 and thermal storage device 2 forms a circulation line.
Preferably, the blower and central controller carry out data connection, the central controller 3 is sensed according to flue
The data of device monitoring automatically control the operation of blower.
When central controller detects that pipeline has flue-gas temperature to be higher than certain temperature, central controller controls upstream valve
6 and valve downstream 7 open, automatically control blower it is out of service.It, can be with because flue-gas temperature at this time meets heat exchange needs
Air preheater and thermal storage device 2 are heated using flue gas.When central controller detects tunnel gas temperature lower than certain temperature
When, central controller controls upstream valve 6 and valve downstream 7 are closed, and central controller automatically controls blower and brings into operation.Cause
Heat exchange needs are unsatisfactory for for flue-gas temperature at this time, it is therefore desirable to heat air preheater using thermal storage device 2.By according to cigarette
Temperature degree controls the intelligent operation of blower, can realize the intelligent control of fan operation according to the actual situation, improve system
It is intelligent.
When central controller detects that pipeline has flue-gas temperature to be higher than certain temperature, bypath valve is closed.When center is controlled
When device processed detects tunnel gas temperature lower than certain temperature, bypath valve is opened.
(7) operation of control blower is detected according to thermal storage device outlet temperature
Preferably, the first temperature sensor is arranged in the outlet of the thermal storage device 2, for detecting thermal storage device exit gas
Temperature.Second temperature sensor is set in the air preheater, for detecting the temperature of air in air preheater 1.It is described
First temperature sensor and second temperature sensor and 3 data connection of central controller.The central controller 3 is according to the first temperature
Spend the operation of the temperature automatic control blower of sensor and second temperature sensor detection.
If the temperature of the first temperature sensor detection is lower than the temperature of second temperature sensor detection, central controller
3 control blowers are out of service.
In the case that upstream valve and valve downstream are closed, the operation of blower, Ke Yishi are controlled by the temperature of detection
Now air preheater is independently heated.Because being found in research and development and experimentation, gradually it is finished when the heat of thermal storage device
In the case of, it may appear that the temperature for the gas that thermal storage device comes out is lower than the temperature of the air in air preheater 1, in such cases again
Heated using thermal storage device air preheater be it is impossible, the heat that may result in air preheater instead is pulled away.Cause
This operation by controlling blower according to the temperature intelligent of detection, so that intelligent control thermal storage device 2 and air preheater 1 follow
Ring improves the generation rate of the air of preheating.
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 (5)
1. a kind of station boiler afterheat utilizing system, the system comprises air preheater and thermal storage device, the air preheater
It is arranged on the main pipeline of flue, the thermal storage device is arranged in secondary duct, and the main pipeline and secondary duct form parallel pipeline,
Flue gas in flue respectively enters the air preheater and thermal storage device of main pipeline and secondary duct, and steaming is generated in air preheater
Vapour carries out heat accumulation in thermal storage device, and the flue gas after exchanging heat in air preheater and thermal storage device converges again into flue；
The position of the entrance of the air preheater of flue collector is arranged in air preheater valve, enters air preheater for controlling
Flue gas flow, the position of the inlet tube of the thermal storage device of secondary duct is arranged in thermal storage device valve, enters thermal storage device for controlling
Flue gas flow, the system also includes central controller, the central controller and air preheater valve and thermal storage device
Valve carries out data connection, and third temperature sensor is arranged at the position of the smoke inlet of air preheater, for measure into
Enter the temperature of the flue gas of air preheater；Third temperature sensor and central controller carry out data connection, central controller root
The valve opening of air preheater valve and thermal storage device valve is automatically controlled according to the temperature of third temperature sensor detection.
2. afterheat utilizing system as described in claim 1, which is characterized in that when the temperature of third temperature sensor measurement is lower than
When certain temperature, central controller controls air preheater valve increases aperture, while controlling the reduction of thermal storage device valve
Aperture, to increase the flow for the flue gas for entering air preheater；When the temperature of third temperature sensor measurement is higher than certain temperature
When spending, central controller controls air preheater valve reduces aperture, while controlling thermal storage device valve and increasing aperture, to subtract
Less into the flow of the flue gas of air preheater.
3. afterheat utilizing system as described in claim 1, which is characterized in that the air preheater includes that heat pipe, flue gas are logical
Road and air duct, the heat pipe include evaporation ends and condensation end, and in the air passageway, evaporation ends are arranged for the condensation end setting
In flue；Evaporation ends absorb the waste heat of flue gas in boiler flue, and the sky in air duct is transferred heat to by condensation end
Gas, it is combustion-supporting that the air after preheating enters boiler furnace progress.
4. afterheat utilizing system as claimed in claim 3, which is characterized in that stabilising arrangement is set in the thermal-collecting tube, it is described
Stabilising arrangement is laminated structure, and the laminated structure is arranged on the cross section of thermal-collecting tube；The stabilising arrangement is square logical
Hole and octagon through-hole composition, the side length of the square through-hole are equal to the side length of octagon through-hole, and the square is logical
Four of hole while be respectively four different octagon through-holes while, four of octagon through-hole apart from one another by side distinguish
It is the side of four different square through-holes.
5. afterheat utilizing system as described in claim 1, which is characterized in that the cross section of thermal-collecting tube is square.
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| CN113137621A (en) * | 2020-10-14 | 2021-07-20 | 山东大学 | Flue distributor utilizing heat pipe for temperature equalization |
| CN114413666A (en) * | 2020-07-23 | 2022-04-29 | 中北大学 | Heat pipe system with flue gas monitoring and cooperative adjustment functions |
| CN114508765A (en) * | 2022-02-16 | 2022-05-17 | 扬州金桃化工设备有限公司 | Combined high-efficiency air preheater and preheating method thereof |
| CN114593522A (en) * | 2020-07-23 | 2022-06-07 | 中北大学 | Smoke temperature measurement cooperative control heat pipe system |
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Effective date of registration: 20201027 Address after: No.1, Southeast Avenue, Zhangjiagang City, Suzhou City, Jiangsu Province (Zhangjiagang Economic and Technological Development Zone) Applicant after: SUZHOU HAILU HEAVY INDUSTRY Co.,Ltd. Address before: 266000 Shandong province Qingdao City, Zhengzhou Road No. 53 Applicant before: Qingdao University Of Science And Technology |
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