CN107101218B - The compact flue gas depth waste-heat recovery device of low-resistance - Google Patents

The compact flue gas depth waste-heat recovery device of low-resistance Download PDF

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Publication number
CN107101218B
CN107101218B CN201710161042.7A CN201710161042A CN107101218B CN 107101218 B CN107101218 B CN 107101218B CN 201710161042 A CN201710161042 A CN 201710161042A CN 107101218 B CN107101218 B CN 107101218B
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China
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heat
intermediary
transferring medium
flue gas
heat transferring
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CN107101218A (en
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孟继安
钟达文
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Tsinghua University
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Tsinghua University
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00—Arrangements of devices for treating smoke or fumes
    • F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
    • 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
    • Y02E20/30—Technologies for a more efficient combustion or heat usage

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

The invention discloses a kind of compact flue gas depth waste-heat recovery devices of efficient low-resistance, it include: heat exchange main body, spray equipment, composite filling component, flue gas enters flaring flow path portion, tapered flow path portion and afterheat utilizing system is discharged in flue gas, heat exchanging chamber is formed in heat exchange main body, heat exchanging chamber has gas inlet, exhanst gas outlet, intermediary's heat transferring medium import and the outlet of intermediary's heat transferring medium, and gas inlet is located at the side of heat exchange main body and including the first sub- import and the second sub- import；Spray equipment is located in heat exchanging chamber to spray into intermediary's heat transferring medium into heat exchanging chamber；Composite filling component is located in heat exchanging chamber；The cross-sectional area that flue gas enters flaring flow path portion is incremented by；The cross-sectional area that tapered flow path portion is discharged in flue gas successively decreases；Afterheat utilizing system is connected respectively with intermediary's heat transferring medium import and the outlet of intermediary's heat transferring medium to recycle the heat of intermediary's heat transferring medium.Fume afterheat can be recycled in recyclable device according to an embodiment of the present invention, has many advantages, such as low-resistance, efficient, compact, inexpensive.

Description

The compact flue gas depth waste-heat recovery device of low-resistance
Technical field
The present invention relates to flue gas waste heat recovery technology fields, more particularly, to a kind of compact flue gas depth waste heat of low-resistance Recyclable device.
Background technique
There are mainly two types of the technologies for being now widely used for low-temperature flue gas waste heat depth recycling field: refrigerant and flue gas partition Formula heat exchange, void tower is sprayed and flue gas direct contact heat transfer.For flue gas waste heat recovery field, at present mainly using partition Formula heat exchange, such as the common low-level (stack-gas) economizer of boiler, low low-level (stack-gas) economizer, equipment is huge if using light pipe heat exchanger, accounts for Ground is big and investment dramatically increases, and more serious fin corrosion and scaling and blocking etc. are likely to occur if using finned tube The electrical power consumed of problem, blower is also bigger, and the flue gas exit temperature end of wall-type heat exchange device it is poor (exit gas temperature with Refrigerant minimum temperature is poor) be generally 20 DEG C -30 DEG C it is even higher, flue gas waste heat recovery efficiency has bigger room for promotion.For Further Mist heat recovering especially latent heat, at present fume afterheat depth recycling are mainly spraying straight with flue gas using void tower Connect contact heat transfer technology, but to be sprayed flue gas flow field in heat exchange columns very uneven for void tower first, especially load deviate design compared with It is become apparent when big, in some cases, occurs serious flue gas bias current and reflux in tower, cause system waste heat to utilize unstable Property and efficiency the problems such as being remarkably decreased, void tower is spraying and the heat exchanger main body exhanst gas outlet temperature of flue gas direct contact heat transfer Degree end difference is generally 5 DEG C -10 DEG C, and flue gas waste heat recovery efficiency also has further room for promotion；Next round tower generallyd use Plume contact heat exchange+smoke entrance sudden expansion sudden contraction structure type, although relatively simple for structure be not only due to heat exchange property Difference causes equipment bigger, and structure is not also compact, and land occupation and system investments are bigger, and furthermore flue gas transporting resistance is bigger With the big grade of intermediary's heat transferring medium flow so that it runs power consumption also than more prominent, comprehensive performance is up for further being promoted.
To sum up, for low-temperature flue gas waste heat recycling field, existing wall-type heat exchange technology there are low-temperature corrosion, fouling and Blocking, equipment pipeline is complicated, and exhaust gas temperature is still relatively high, and waste heat recycling is obvious insufficient, takes up a large area, and maintenance cost is high, The problems such as investment payback time is long；Void tower is sprayed direct contact heat transfer, and there are bias currents serious in heat exchange columns even to flow back, Waste heat recycling is still insufficient and system is not compact enough, and flue gas transporting resistance is bigger and intermediary's heat transferring medium flow is big Deng so that its run power consumption also than more prominent, comprehensive performance is up for further being promoted.
Summary of the invention
The present invention is directed to solve at least some of the technical problems in related technologies.For this purpose, the present invention mentions A kind of compact flue gas depth waste-heat recovery device of low-resistance is gone out, it is defeated to can reduce flue gas for the flue gas depth waste-heat recovery device Resistance is sent, the velocity distribution uniformity of flue gas is improved, heat exchange flow resistance can also be reduced, improves waste heat recovery efficiency.
The compact flue gas depth waste-heat recovery device of low-resistance according to an embodiment of the present invention, comprising: heat exchange main body, spray dress It sets, composite filling component, flue gas enter flaring flow path portion, tapered flow path portion and afterheat utilizing system, the heat exchange is discharged in flue gas Heat exchanging chamber is formed in main body, the heat exchanging chamber has gas inlet, exhanst gas outlet, intermediary's heat transferring medium import and intermediary's heat exchange Media outlet, the exhanst gas outlet are located at the top or side of the heat exchange main body, and the gas inlet is located at the heat exchange master The side of body and including the first sub- import and the second sub- import, intermediary's heat transferring medium import is located at the top of heat exchanging chamber, institute State the lower part that the outlet of intermediary's heat transferring medium is located at heat exchanging chamber；The spray equipment is located in the heat exchanging chamber and changes with the intermediary Thermal medium inlet connection, to spray into intermediary's heat transferring medium into the heat exchanging chamber by the spray equipment；The composite filling Component is located in the heat exchanging chamber, the lower section of the spray equipment and between the gas inlet and the exhanst gas outlet, The second sub- import connects the side wall of the composite filling component, and the first sub- import is located at below the described second sub- import And it is lower than the composite filling component, flue gas enters the heat exchanging chamber from the gas inlet, and flue gas is in the composite filling group It is flowed from bottom to top in part and carries out contacting heat with the intermediary's heat transferring medium that flows from above to below sprayed by the spray equipment Mass transter；One end that the flue gas enters flaring flow path portion is connected and in the flow direction of the flue gas at least with the gas inlet The cross-sectional area that the part flue gas enters flaring flow path portion is incremented by；The flue gas be discharged tapered flow path portion one end and the cigarette The cross-sectional area that gas outlet is connected and tapered flow path portion is discharged in at least partly described flue gas in the flow direction of the flue gas successively decreases；Institute Afterheat utilizing system is stated to be connected described in recycling with intermediary's heat transferring medium import and intermediary's heat transferring medium outlet respectively The heat of intermediary's heat transferring medium.
The compact flue gas depth waste-heat recovery device of low-resistance according to an embodiment of the present invention, can reduce flue gas transporting resistance, The velocity distribution uniformity for improving flue gas can also reduce heat exchange flow resistance, improve waste heat recovery efficiency.
In addition, heat-exchanging component according to the above embodiment of the present invention can also have the following additional technical features:
According to some embodiments of the present invention, the described first sub- import and the second sub- inlet communication, and described second The height of size h and the composite filling component that sub- import extends in vertical direction and the ratio of H are 1/10 to 1/2.
According to some embodiments of the present invention, the heat exchanging chamber is formed as substantially cuboid, the gas inlet and described Exhanst gas outlet is located on relative or neighbor two side of the heat exchanging chamber.
According to some embodiments of the present invention, to include that at least two specific surface areas are different fill out the composite filling component Material, wherein the small filler of specific surface area is located at the described second sub- entrance.
According to some embodiments of the present invention, the compact flue gas depth waste-heat recovery device of the low-resistance further include: intermediary changes Heat medium pipeline system, intermediary's heat transferring medium pipe-line system are separately connected intermediary's heat transferring medium outlet and the intermediary Heat transferring medium import, intermediary's heat transferring medium is exported from intermediary's heat transferring medium to flow out, after afterheat utilizing system cooling, Flow to intermediary's heat transferring medium import, intermediary's heat transferring medium pipe-line system includes: intermediary's heat transferring medium outlet pipe, it is described in One end of Jie's heat transferring medium outlet pipe is with intermediary's heat transferring medium outlet and the other end is connected with afterheat utilizing system；Intermediary One end of heat transferring medium inlet pipe, intermediary's heat transferring medium inlet pipe is connected with afterheat utilizing system and the other end is changed with the intermediary Thermal medium inlet connection, so that intermediary's heat transferring medium changes after discharging heat cooling in afterheat utilizing system through the intermediary Thermal medium inlet pipe flow to the spray equipment；Intermediary's heat transferring medium pump, intermediary's heat transferring medium pump are located at intermediary's heat exchange In medium outlet pipe.
Optionally, the compact flue gas depth waste-heat recovery device of the low-resistance further include: add alkali system, described plus alkali system with Intermediary's heat transferring medium outlet pipe is connected to add lye into intermediary's heat transferring medium to adjust intermediary's heat transferring medium PH value.
Further, described plus alkali system includes: the lye tank for storing the lye；Add alkali pipe-line system, it is described One end of alkali pipe-line system is added to be connected with the lye tank and the other end and intermediary's heat transferring medium outlet；Controller, The controller is connected to control the on-off of described plus alkali pipe-line system with described plus alkali pipe-line system；Add alkali pump, described plus alkali Pump is located in described plus alkali pipe-line system and is connected with the controller with the start and stop under the control of the controller；For heating The heating device of the lye, the heating device include the lye heat tracing heat transfer unit being located in lye tank and with the lye Heat tracing heat transfer unit connected lye heat tracing inlet pipeline and lye heat tracing outlet conduit.
Optionally, the lye tank is located in the heat exchange main body.
According to some embodiments of the present invention, the compact flue gas depth waste-heat recovery device of the low-resistance further include: dehydrater, The dehydrater is located in the heat exchange main body and the neighbouring exhanst gas outlet.
Optionally, the afterheat utilizing system is heat pump or waste heat utilization heat exchanger.
Additional aspect and advantage of the invention will be set forth in part in the description, and will partially become from the following description Obviously, or practice through the invention is recognized.
Detailed description of the invention
Fig. 1 is the schematic illustration of flue gas depth waste-heat recovery device according to an embodiment of the present invention；
Fig. 2 is the structural schematic diagram of the main view of flue gas depth waste-heat recovery device according to an embodiment of the present invention；
Fig. 3 is to enclose the enlarged drawing shown in Fig. 2 at gas inlet；
Fig. 4 is the structural schematic diagram of the top view of flue gas depth waste-heat recovery device according to an embodiment of the present invention；
The perspective view of the part-structure of Fig. 5 flue gas depth waste-heat recovery device according to an embodiment of the present invention；
Fig. 6 is that flue gas and intermediary's heat exchange are situated between in flue gas depth waste-heat recovery device heat exchange main body according to an embodiment of the present invention The flow schematic diagram of matter, wherein filled arrows are the flow direction of intermediary's heat transferring medium, and hollow arrow is the flow direction of flue gas；
Fig. 7 is the perspective view of the composite filling component of flue gas depth waste-heat recovery device according to an embodiment of the present invention；
Fig. 8 is the structural schematic diagram of the main view of flue gas depth waste-heat recovery device according to an embodiment of the present invention；
Fig. 9 is the structural schematic diagram of the main view of flue gas depth waste-heat recovery device according to an embodiment of the present invention；
Figure 10 is the structural schematic diagram of the main view of flue gas depth waste-heat recovery device according to an embodiment of the present invention；
Figure 11 is the knot of lye tank heating device in flue gas depth waste-heat recovery device according to some embodiments of the invention Structure schematic diagram, wherein heat tracing liquid is conveyed by gravity；
Figure 12 is lye tank heating device in the flue gas depth waste-heat recovery device of other embodiments according to the present invention Structural schematic diagram, wherein heat tracing liquid is conveyed by draft；
Figure 13 is lye tank heating device in the flue gas depth waste-heat recovery device of still other embodiments according to the present invention Structural schematic diagram, wherein heat tracing liquid is conveyed by gravity and draft；
Figure 14 is the structural schematic diagram of the top view of flue gas depth waste-heat recovery device according to an embodiment of the present invention；
Figure 15 is the perspective view of the composite filling component of flue gas depth waste-heat recovery device according to an embodiment of the present invention；
Figure 16 is the structural schematic diagram of the main view of flue gas depth waste-heat recovery device according to an embodiment of the present invention；
Figure 17 is the perspective view of the composite filling component of flue gas depth waste-heat recovery device according to an embodiment of the present invention.
Appended drawing reference:
100: flue gas depth waste-heat recovery device；
1: heat-exchanging component；
11: heat exchange main body；112: heat exchanging chamber；113: composite filling component；1131: the first composite fillings；1132: the second groups Close filler；114: spray space；115: spray equipment；1151: spray head；1152: spray tube；116: intermediary's heat transferring medium goes out Mouthful；117: intermediary's heat transferring medium import；118: gas inlet；1181: the first sub- imports；1182: the second sub- imports；119: flue gas Outlet；12: flue gas enters flaring flow path portion；13: tapered flow path portion is discharged in flue gas；14: dehydrater；
2: flue system；21: flue gas inlet pipe；22: flue gas outlet pipe；23: blower；24: chimney；
3: intermediary's heat transferring medium pipe-line system；31: intermediary's heat transferring medium outlet pipe；32: intermediary's heat transferring medium inlet pipe；33: in Jie's heat transferring medium pump；
4: adding alkali system；40: controller；41: adding alkali pipe-line system；42: lye tank；43: adding alkali pump；44: lye tank companion Thermal；440: lye tank heat tracing heat transfer unit；441: lye tank heat tracing inlet pipeline；442: lye tank heat tracing outlet conduit；
5: afterheat utilizing system.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings.Below with reference to The embodiment of attached drawing description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention, ability The those of ordinary skill in domain can make changes, modifications, alterations, and variations to the above described embodiments within the scope of the invention.
In the description of the present invention, it is to be understood that, term " on ", "lower", "front", "rear", "vertical", "horizontal", The orientation or positional relationship of the instructions such as "top", "bottom", "inner", "outside", " radial direction " is that orientation based on the figure or position are closed System, is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning must have Specific orientation is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or Implicitly include at least one this feature.In the description of the present invention, the meaning of " plurality " is at least two, such as two, three It is a etc., unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, fisrt feature in the second feature " on " or " down " can be with It is that the first and second features directly contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists Second feature " under ", " lower section " and " following " can be fisrt feature and be directly under or diagonally below the second feature, or only table Show that first feature horizontal height is less than second feature.
The compact flue gas depth waste-heat recovery device of low-resistance according to an embodiment of the present invention is described in detail with reference to the accompanying drawing, In, up and down direction be subject to 1 normal use of heat-exchanging component when up and down direction, with filled arrows solid line signal intermediary heat exchange be situated between The flow direction of matter, the flow direction of the solid line signal flue gas with hollow arrow.In the following description, intermediary's heat transferring medium refers to, On the one hand and flue gas in flue gas waste heat recovery apparatus 100 contact heat-exchanging and absorb the low temperature exhaust heat of flue gas, on the other hand with it is remaining Heat utilization medium is exchanged heat and exothermic intermediate heat transferring medium in afterheat utilizing system 5.
Shown in referring to Fig.1, the flue gas waste heat recovery apparatus according to an embodiment of the present invention that is used for includes: heat exchange main body 11, spray Shower device 115, composite filling component 113, flue gas enter flaring channel part 12, flue gas discharge tapered channels portion 13 and UTILIZATION OF VESIDUAL HEAT IN System 5.
Specifically, it is as illustrated in figs. 1 and 2, it could be formed with heat exchanging chamber 112 in the main body 11 that exchanges heat, heat exchanging chamber 112 can have There are gas inlet 118, exhanst gas outlet 119, intermediary's heat transferring medium import 117 and intermediary's heat transferring medium outlet 116, wherein flue gas goes out Mouth 119 can be located at the top of heat exchange main body 11, and gas inlet 118 is located at the side of heat exchange main body 11, and gas inlet 118 Including the first sub- import 1181 and the second sub- import 1182, so that flue gas can be from the first sub- import 1181 and the second sub- import 1182 enter heat exchanging chamber 112, can flow from the exhanst gas outlet 119 on heat exchange 11 top of main body after completing heat exchange with intermediary's heat transferring medium Out.
Spray equipment 115 can be located in heat exchanging chamber 112, and spray equipment 115 can be with intermediary heat transferring medium import 117 Connection is changing intermediary's heat transferring medium and flue gas to spray into intermediary's heat transferring medium into heat exchanging chamber 112 by spray equipment 115 It is directly contacted in hot chamber 112, realizes heat exchange.
Composite filling component 113 can be used for making flue gas and intermediary's heat transferring medium direct contact heat transfer, as depicted in figs. 1 and 2, Composite filling component 113 can be located in heat exchanging chamber 112, and composite filling component 113 may include that one or several kinds compare table The different filler of area, composite filling component 113 can be located at the lower section of spray equipment 115, and composite filling component 113 can Between gas inlet 118 and exhanst gas outlet 119, as shown in figure 3, the first sub- import 1181 can be with composite filling component 113 Side wall face, the second sub- import 1182 can be located at 1181 lower section of the first sub- import, and the second sub- import 1182 can be lower than group Close filler assembly 113.It can directly flow into and combine from side from the flue gas that the first sub- import 1181 enters heat exchanging chamber 112 as a result, Filler assembly 113, the flue gas for entering heat exchanging chamber 112 from the second sub- import 1182 can flow into composite filling component bottom-up 113, so as to improve the uniformity that flue gas is distributed in heat exchanging chamber 112, avoid occurring flow of flue gas low speed in heat exchanging chamber 112 Area even recirculating zone, so as to improve heat exchange property.
As shown in Fig. 2, one end that flue gas enters flaring channel part 12 can be connected with gas inlet 118, and in flue gas On flow direction, the radial dimension that at least partly flue gas enters flaring channel part 12 can be incremented by, and tapered channels portion is discharged in flue gas 13 one end can be connected with exhanst gas outlet 119, and in the flow direction of the flue gas, and at least partly tapered channels portion is discharged in flue gas 13 radial dimension can successively decrease.That is, flue gas, which enters flaring channel part 12, is formed as flaring channel, flue gas discharge is tapered Channel part 13 is formed as reducing channel.In this way, distributing homogeneity of the flue gas in filler not only can be improved, but also can drop Resistance in low flue gas transmission process further increases heat exchange efficiency and reduces flue gas conveying power consumption.
Wherein, heat exchange main body 11, spray equipment 115, composite filling component 113, flue gas enter flaring flow path portion 12 and cigarette Tapered flow path portion 13, which is discharged, in gas can collectively form heat-exchanging component 1.
Afterheat utilizing system 5 can be connected with intermediary heat transferring medium import 116 and intermediary's heat transferring medium outlet 117 respectively, with The heat for recycling intermediary's heat transferring medium, improves the utilization rate of heat.
Flue gas waste heat recovery apparatus 100 according to an embodiment of the present invention, by forming heat exchanging chamber in heat exchange main body 11 112, setting spray equipment 115 sprays into intermediary's heat transferring medium into heat exchanging chamber 112, and composite filling component 113 is located at heat exchanging chamber In 112, make intermediary's heat transferring medium and the flue gas direct contact heat transfer in heat exchanging chamber 112, and composite filling component 113 is located at spray The lower section of shower device 115 can be improved heat exchange efficiency and reduce flow of flue gas resistance using 113 auxiliary heat-exchanging of composite filling component Flue gas is entered flaring channel part 12 and is set as flaring pipeline by power, and flue gas discharge tapered channels portion 13 is set as decrement pipeline, may be used also To further increase heat exchange efficiency and reduce the flow resistance of flue gas, and gas inlet 118 is set as including the first sub- import 1181 and the second sub- import 1182, make the side wall face of the first sub- import 1181 and composite filling component 113, and make the second son into Mouth 1182, which is located at, is lower than composite filling component 113, and the uniformity that flue gas is distributed in heat exchanging chamber 112 can be improved, pass through waste heat The heat of intermediary's heat transferring medium is recycled, using system 5 so as to further enhance heat exchange property and reduce the flowing of flue gas Resistance improves heat recovery rate.
According to some embodiments of the present invention, as shown in figure 3, the first sub- import 1181 and the second sub- import 1182 can connect It is logical, and the size h and composite filling component 113 that the first sub- import 1181 and the second sub- import 1182 extend in vertical direction Height H ratio can be 1/10 to 1/2.That is h/H can between 0.1-0.5 value, for example, shown in Fig. 3 Example in, h/H is about 1/3.Thus, it is possible to improve the flow field uniformity and cigarette that flue gas enters in composite filling component 113 The consistency of temperature of the gas when flowing out accommodating chamber is conducive to heat exchange, but also can reduce flow of flue gas to a certain extent simultaneously Resistance.
In some embodiments, heat exchanging chamber 112 can be formed as substantially cuboid, simple and compact for structure, gas inlet 118 It can be located on relative or neighbor two side of heat exchanging chamber 112 with exhanst gas outlet 119.Specifically, as shown in figure 5, cigarette Gas import 118 and exhanst gas outlet 119 are formed on opposite two side of heat exchanging chamber 112, are changed so that flue gas enters from side Hot chamber 112 flows out after completing heat exchange from opposite side, can extend connecing for flue gas and intermediary's heat transferring medium to a certain extent The time is touched, exhaust-heat absorption rate is improved.Alternatively, as shown in figure 11, gas inlet 118 and exhanst gas outlet 119 can be formed in heat exchange On adjacent two side of chamber 112, flue gas from the side of heat exchanging chamber 112 flow into, in heat exchanging chamber 112 with intermediary's heat transferring medium It exchanges heat, after completing heat exchange, flue gas can be flowed out from adjacent side, be not only simple in structure, and pipeline is facilitated to arrange.
Optionally, intermediary's heat transferring medium can be water, since the specific heat capacity of water is larger, is exchanged heat and is situated between as intermediary using water Matter, by water and flue gas, direct contact heat transfer so as to absorb the latent heat in flue gas improves heat exchange property in heat exchanging chamber 112, And cost can be reduced as intermediary's heat transferring medium using water.
Generally, due to a certain amount of acidic materials and flue dust is contained in flue gas, intermediary's heat transferring medium is changed with smoke contacts Part therein will be absorbed in thermal process, and to guarantee that the pH value of intermediary's heat transferring medium meets the anti-of equipment and pipe-line system Corruption requires, and needs that a certain amount of alkaline matter is added to intermediary's heat transferring medium, therefore, the water of intermediary's heat transferring medium is also substantially Mixed solution containing a certain amount of salt, acid-base class and flue dust class.
As shown in Figure 1, intermediary's heat transferring medium import 117 can be located at the top of heat exchanging chamber 112, and intermediary's heat transferring medium Outlet 116 can be located on the bottom wall of heat exchanging chamber 112, so that intermediary's heat transferring medium can enter from the top of heat exchanging chamber 112, by Spray equipment 115 sprays, and moves downward under gravity, after completing the heat exchange with flue gas, from 112 bottom wall of heat exchanging chamber 116 outflow of intermediary's heat transferring medium outlet.On the one hand it can increase the contact area of intermediary's heat transferring medium and flue gas, improve heat exchange effect On the other hand rate can make full use of composite filling component 113 to be assisted, enhance heat transfer effect.
According to some embodiments of the present invention, as shown in Fig. 2, spray equipment 115 may include: spray head 1151 and spray Pipe 1152, wherein spray head 1151 can be located in heat exchanging chamber 112, and spray head 1151 can be located at composite filling component 113 top, one end of spray tube 1152 can be connected to intermediary heat transferring medium import 117, and the other end of spray tube 1152 It can be connected with spray head 1151.In this way, intermediary's heat transferring medium can flow into spray tube 1152 from intermediary's heat transferring medium import 117, Then it is sprayed by spray head 1151, sprays in spray space 114, directly contacted with flue gas from bottom to top from top to bottom Formula heat exchange, and composite filling component 113 can provide the main carriers that caloic exchanges with intermediary heat transferring medium for flue gas, thus It can be further improved heat exchange efficiency.
Optionally, spray head 1151 can be multiple, and multiple spray heads 1151 can be apart from one another by setting, in improving The uniformity of Jie's heat transferring medium spray, optimizes heat exchange property, while can also reduce the discharge of dust particles in flue gas.For example, As shown in figures 1 and 3, spray head 1151 can be arranged side by side three, and certainly, structure of the invention is without being limited thereto, spray First 1151 can also be four, five and crossbar array arrangement etc., this is to be understood that one skilled in the art , it is not described in detail herein.
In some embodiments, as shown in Fig. 2, Fig. 3 and Fig. 6, composite filling component 113 may include a kind of identical specific surface Long-pending filler.Alternatively, composite filling component 113 may include the different filler of at least two specific surface areas, wherein specific surface area Small filler can be located at the second sub- entrance, i.e. the small filler of specific surface area can be located at region near the second sub- import. It is illustrated in figure 7 the filler including two kinds of different specific surface areas, i.e. the first composite filling 1131 and the second composite filling 1132, In the second composite filling 1132 large specific surface area, the packing specific area of the first composite filling 1131 is small.First composite filling 1131 be the filler of main flue gas and intermediary's heat transferring medium contact heat-exchanging, and the second composite filling 1132 is to improve and be located at flue gas The smaller filler of the specific surface area that the velocity of flue gas of inlet side is relatively low and sets, the second composite filling 1132 are located at gas inlet Side, or perhaps it is located at the sub- import near zone of flue gas first.The second composite filling 1132, which is arranged, can further improve flue gas Velocity distribution uniformity in filler, so as to further increase the contact heat-exchanging performance of flue gas Yu intermediary's heat transferring medium.
According to some embodiments of the present invention, flue gas waste heat recovery apparatus 100 can also include: intermediary's heat transferring medium pipeline System, intermediary's heat transferring medium pipe-line system are separately connected intermediary's heat transferring medium outlet 116 and intermediary's heat transferring medium import 117, in Jie's heat transferring medium flows in described after the afterheat utilizing system 5 cooling from 116 outflow of intermediary's heat transferring medium outlet Jie's heat transferring medium import 117.
As shown in Figure 1, intermediary's heat transferring medium pipe-line system include: intermediary's heat transferring medium outlet pipe 31 and intermediary's heat transferring medium into Pipe 32, wherein one end of intermediary's heat transferring medium outlet pipe 31 can export 116 with intermediary's heat transferring medium and be connected to, and intermediary's heat transferring medium goes out The other end of pipe 31 can be connected with afterheat utilizing system 5, and intermediary's heat transferring medium flows out from heat exchanging chamber 112 and in afterheat utilizing system Heat is released in 5 and is cooled down；One end of intermediary's heat transferring medium inlet pipe 32 can be connected with afterheat utilizing system 5, and intermediary's heat exchange is situated between The other end of matter inlet pipe 32 can be connected to intermediary's heat transferring medium import 117 that 112 top of heat exchanging chamber is arranged in, so that intermediary exchanges heat Medium discharges in afterheat utilizing system 5 flow to the spray equipment 115 through intermediary's heat transferring medium inlet pipe 32 after heat cools down.? That is the intermediary's heat transferring medium releasing heat in afterheat utilizing system 5 and being cooled down is through connection afterheat utilizing system 5 in Intermediary's heat transferring medium inlet pipe 32 of Jie's heat transferring medium import 117 is delivered to the spray equipment 115 in heat exchanging chamber 112.Intermediary's heat exchange Medium by spray equipment 115 spray after, in heat exchanging chamber with smoke contact heat exchange and absorb the heat in flue gas, flue gas cool-down It heats up with intermediary's heat transferring medium, intermediary's heat exchange that intermediary's heat transferring medium drop to 112 bottom of heat exchanging chamber under gravity is situated between In matter header, the heat exchange that intermediary's heat transferring medium is cooled down in afterheat utilizing system 5 and will be warmed in 1 in heat exchange group is completed Circulation, realizes the recycling of fume afterheat.
As depicted in figs. 1 and 2, intermediary's heat transferring medium pipe-line system can also include: intermediary's heat transferring medium pump 33, and intermediary changes Thermal medium pump 33 can be located in intermediary's heat transferring medium outlet pipe 31, will complete the intermediary's heat transferring medium to exchange heat from heat exchange main body 11 In pump out, realize intermediary's heat transferring medium circulation.
In some embodiments, as depicted in figs. 1 and 2, flue gas waste heat recovery apparatus 100 can also include: to add alkali system 4, wherein add alkali system 4 that can be connected with intermediary heat transferring medium outlet pipe 31, with added into intermediary's heat transferring medium lye to adjust in The pH value of Jie's heat transferring medium.During flue gas and intermediary's heat transferring medium contact heat-exchanging, it can not only make the temperature of intermediary's heat transferring medium Degree increases, and can absorb the partially acidic substance in flue gas, such as sulfur dioxide etc., and setting plus alkali system 4 can will be completed The pH value adjustment of intermediary's heat transferring medium after heat exchange to zone of reasonableness, such as neutral or alkalescent prevents equipment and pipe-line system It is corroded, while emission compliance can be made.
As depicted in figs. 1 and 2, alkali system 4 is added to may include: lye tank 42 plus alkali pipe-line system 41, controller 40, add Alkali pump 43 and lye tank heating device 44.Specifically, lye tank 42 can be used for storing lye, add one end of alkali pipe-line system 41 It can be connected with lye tank 42 and the other end can be connected to intermediary heat transferring medium outlet pipe 31, the lye in lye tank 42 is added to In intermediary's heat transferring medium, controller 40 can with add alkali pipe-line system 41 and add alkali pump 43 be connected, to realize intermediary's heat transferring medium PH measurement, the reasonable addition of the on-off of control plus alkali pipe-line system 41 and lye, add alkali pump 43 that can be located at and add alkali pipe-line system On 41, and add alkali pump 43 that can be connected with controller 40 to start under the control of the controller 40.It needs to intermediary's heat transferring medium When middle addition lye, the control of controller 40 plus alkali pipe-line system 41 are connected to and control and alkali pump 43 is added to start, and add alkali pump 43 by lye Lye in case 42 is pumped in intermediary's heat transferring medium, to adjust the pH value of intermediary's heat transferring medium.Cigarette not only may be implemented as a result, The recycling of gas waste heat, and the discharge that sulfur and nitrogen oxides can be reduced etc..
Heating device 44 can be used for heating lye, prevent low temperature lye crystallization etc., heating device 44 may include being located at alkali Lye tank heat tracing heat transfer unit 440 in liquid case 42 and the lye tank heat tracing import being connected with lye tank heat tracing heat transfer unit 440 Pipeline 441 and lye tank heat tracing outlet conduit 442.
As shown in Figure 1, Figure 2, Figure 11, Figure 12 and Figure 13, heating device 44 can use intermediary's heat transferring medium to the alkali of lye tank Liquid carries out heat tracing, to prevent low-temperature alkaline liquid crystallization etc..The temperature of intermediary's heat transferring medium is usually 30-50 DEG C, by 112 bottom of heat exchanging chamber The heat of intermediary's heat transferring medium in portion sends the lye in lye tank 42 to by lye tank heating device 44, may make lye tank Lye in 42 keeps certain temperature in low temperature environment, so as to be effectively prevented low temperature lye crystallization etc..
It can also be by the intermediary in intermediary's heat transferring medium inlet pipe 32 or intermediary's heat transferring medium outlet pipe 31 or heat exchanging chamber 112 The heat of heat transferring medium sends the lye in lye tank 42 to, but uses and lead to the heat of intermediary's heat transferring medium of heat exchanging chamber bottom Cross lye tank heating device 44 send to lye in lye tank 42 mode it is more simple and effective.
The heat of intermediary's heat transferring medium of 112 bottom of heat exchanging chamber is transferred to lye tank 42 by lye tank heating device 44 In lye intermediary's heat transferring medium transmission power, can use what intermediary's heat transferring medium (that is, heat tracing liquid) fell from eminence Pressure head, referred to as gravity for transport, as shown in figure 11；Also it can use intermediary's heat transferring medium pump 33 to export with intermediary's heat transferring medium The pressure difference obtained in 116 pipelines being arranged in heat exchanging chamber 112 being connected, or 116 are exported with intermediary's heat transferring medium The transmission of the pressure difference obtained in the intermediary's heat transferring medium outlet pipe 31 being connected, referred to as draft, as shown in figure 12；It can also combine Gravity for transport and draft transmission are stated, referred to as gravity and draft transmits, as shown in figure 13.It is of course also possible to which lye heat tracing pump is arranged Pump the mode of heat tracing liquid (for example, intermediary's heat transferring medium), the referred to as transmission of heat tracing pump；Can also by the way of adopting heat pipes for heat transfer, Referred to as heat pipe transmits；And can be by the way of electric heating lye, referred to as electric heating heat tracing.But gravity for transport above-mentioned, pumping Power transmission and gravity and draft transmission mode are more easy, reliable and economical.
Specifically, as shown in figure 11, lye tank heating device 44 includes the lye heat tracing heat transfer being arranged in lye tank 42 Unit 440, and the lye heat tracing inlet pipeline 441 and lye heat tracing outlet that are connected with lye heat tracing heat transfer unit 440 Road 442, wherein lye heat tracing inlet pipeline 441 and lye heat tracing outlet conduit 442 respectively with lye heat tracing heat transfer unit 440 The outlet of heat tracing import and heat tracing be connected, the heat-exchanging loop that composition intermediary's water can circulate, and the other end is connected to and changes The bottom of hot chamber 112, but lye heat tracing inlet pipeline 441 and lye heat tracing outlet conduit 442 be there are certain intermediary's water drop, Pressure (drop) so as to be fallen using intermediary's heat transferring medium from eminence drives intermediary's water in lye heat tracing heat transfer unit 440 Flowing, when alkali liquid temperature lower than that through intermediary's heat transferring medium temperature when realize to lye and transmit heat, referred to as gravity for transport Lye heat tracing.
Specifically, as shown in figure 12, lye tank heating device 44 includes the lye heat tracing heat transfer list being arranged in lye tank Member 440, and the lye heat tracing inlet pipeline 441 and lye heat tracing outlet conduit that are connected with lye heat tracing heat transfer unit 440 442, wherein one end of lye heat tracing inlet pipeline 441 and lye heat tracing outlet conduit 442 respectively with lye heat tracing heat transfer unit 440 heat tracing import is connected with heat tracing outlet, the heat-exchanging loop that composition intermediary's water can circulate, and lye heat tracing inlet pipeline 441 other end is connected to the bottom of heat exchanging chamber 112, and the other end of lye heat tracing outlet conduit 442 is connected to exchange heat with intermediary On the pipeline that media outlet 116 is connected, conducted heat using draft driving intermediary's water of intermediary's heat transferring medium pump 33 in lye heat tracing Unit 440 flows through, when alkali liquid temperature lower than that through intermediary's heat transferring medium temperature be realize to lye transmit heat, referred to as take out Power transmits lye heat tracing.
Specifically, as shown in figure 13, the lye tank heating device 44, the lye heat tracing including being arranged in lye tank passes Hot cell 440, and lye heat tracing inlet pipeline 441 and lye the heat tracing outlet being connected with lye heat tracing heat transfer unit 440 Pipeline 442, wherein one end of lye heat tracing inlet pipeline 441 and lye heat tracing outlet conduit 442 is conducted heat with lye heat tracing respectively The heat tracing import of unit 440 is connected with heat tracing outlet, the heat-exchanging loop that composition intermediary's water can circulate, and lye heat tracing import The other end of pipeline 441 is connected to the bottom of heat exchanging chamber 112, and the other end of lye heat tracing outlet conduit 442 is connected to and intermediary On the pipeline that heat transferring medium outlet 116 is connected, between the heat tracing import of lye heat tracing heat transfer unit 440 and heat tracing outlet not only The pressure head (drop) that intermediary's heat transferring medium falls from eminence, but also exist due to the heat exchange of 33 pumping intermediaries of intermediary's heat transferring medium pump Medium and the draft pressure difference generated, when alkali liquid temperature lower than that through the temperature of intermediary's heat transferring medium be to realize to lye to transmit heat Amount, referred to as gravity and draft transmit lye heat tracing.
Advantageously, it as shown in figure 5, lye tank 42 can be located in heat exchange main body 11, is accounted for reducing the space of lye tank 42 With so that the structure of heat-exchanging component 1 is more compact, while being also convenient for carrying out using lye of intermediary's heat transferring medium to lye tank 42 Heat tracing.
According to some embodiments of the present invention, flue gas waste heat recovery apparatus 100 can also include: dehydrater 14, as Fig. 1, Shown in Fig. 2 and Figure 10, dehydrater 14 can be located in heat exchange main body 11, and can be adjacent to exhanst gas outlet 119, and dehydrater 14 can To collect the tiny droplet in the flue gas after heat exchange, the water mist carried secretly in flue gas is reduced, so as to reduce flue gas discharge The low-temperature corrosion in tapered channels portion 13, prolongs the service life.The top on the top of heat exchange main body 11 can be set in dehydrater 14, Such as Fig. 1 and Fig. 2, the side on the top of heat exchange main body 11, such as Figure 10 can also be set.
Optionally, afterheat utilizing system 5 can be heat pump or waste heat utilization heat exchanger, so as to recycle intermediary's heat transferring medium In sensible heat and latent heat, realize heating etc., improve the utilization rate of heat.
According to embodiments of the present invention one flue gas waste heat recovery apparatus 100 is retouched in detail below with reference to Fig. 1-Figure 13 It states.
As shown in Figure 1 and Figure 2, the flue gas from flue gas inlet pipe 21 enters flaring channel part 12 by flue gas and flows into heat exchange main body After 11, flue gas flow rate is reduced and flue gas kinetic energy is efficiently converted into pressure energy, so as to be effectively reduced smoke flow resistance.Cigarette It uniformly flows into heat exchanging chamber 112 after the stretched reduction of speed of gas from gas inlet 118 and is connect in composite filling component 113 with shower water Touching heat exchange eliminates the relatively large scale drift of the flue gas of prior art when with intermediary's heat transferring medium contact heat-exchanging even reflux etc. and asks Topic, not only reduces flue gas smoke flow resistance during contact heat-exchanging, and significantly improve heat exchange property.
It is equal in order to further increase velocity of flue gas of the flue gas in composite filling component 113 as shown in Fig. 2, Fig. 3 and Fig. 6 The consistency of flue-gas temperature after even property and contact heat-exchanging, gas inlet 118 are set as including the first sub- import 1181 and the second son Import 1182, i.e., most of flue gas enter heat exchanging chamber 112 through the first sub- import 1181, then by 113 lower section of composite filling component Intermediary's heat transferring medium in into composite filling component 113 from top to bottom carries out contact heat-exchanging and fraction flue gas through second Sub- import 1182 is directly entered in composite filling component 113 from side, and is contacted with intermediary's heat transferring medium from top to bottom Heat exchange.
Meanwhile the filler that composite filling component 113 can use one or several kinds of specific surface areas different.Using two kinds or The filler of the two or more different specific surface areas of person, is arranged in the low region of velocity of flue gas, Ke Yijin for the small filler of specific surface area One step improves flue gas velocity distribution uniformity in filler, so as to further increase flue gas and intermediary's heat transferring medium in filler In heat exchange property and reduce flow resistance of the flue gas in filler.Numerical simulation analysis shows the cigarette in gas inlet region Gas velocity degree is relatively low, usually the smaller filler of specific surface area can be arranged in gas inlet side region, to improve the cigarette in the region Gas velocity distribution uniformity.The filler for generalling use two kinds of specific surface areas can be obtained satisfied velocity of flue gas and be evenly distributed Property.Using the filler of two kinds of specific surface areas, as shown in fig. 7, i.e. heat exchanger body combination filler assembly 113 includes that the first combination is filled out Material 1131 and second composite filling 1132, the specific surface of the specific surface area of the second composite filling 1132 than the first composite filling 1131 Product is slightly smaller, the second slightly smaller composite filling of region setting specific surface area near the first sub- import 1181 1132, it can further improve flue gas flue-gas temperature after the velocity uniformity and contact heat-exchanging in composite filling component 113 Consistency, to further reduce flow resistance of flue gas during contact heat-exchanging and improve heat exchange property.
The horizontal middle section of composite filling component 113 be it is rectangular, the structure of heat-exchanging component 1 can be made compact, especially That the advantage of compactedness is more prominent for large scale system, can save compared with the existing technology equipment land occupation 20% with On, investment is more saved.
As shown in Figure 1 and Figure 2, flue gas contact changing in composite filling component 113 with intermediary's heat transferring medium from top to bottom Heat, flue gas cool-down dehumidification and intermediary's heat transferring medium heat up increment, then flue gas flow through 113 top of composite filling component spray it is empty Between 114, and after dehydrater 14 again through flue gas discharge tapered channels portion 13 be depressured speedup after flow out heat-exchanging component 1.Subtract the cigarette of expansion Gas enters the flue gas decompression speedup that flaring channel part 12 can flow through, and the sudden contraction mode generallyd use compared with the existing technology can It is effectively reduced the flow resistance of flue gas.Flue gas is after heat-exchanging component 1 is flowed out in flue gas discharge tapered channels portion 13, through subsequent flue gas It is discharged into atmosphere after outlet pipe 22, chimney 24.
At the same time, as shown in Figure 1, Figure 2 and Figure 3, intermediary's heat transferring medium in heat exchanging chamber 112 goes out through intermediary's heat transferring medium Mouth 116 flows into intermediary's heat transferring medium outlet pipes 31, send into afterheat utilizing system 5 (such as heat pump) and exchanges heat, by waste heat benefit With intermediary's heat transferring medium after the heat exchange cooling of system 5 again through intermediary's heat transferring medium inlet pipe 32 from intermediary's heat transferring medium import 117 Flow into spray equipment 115.Spray equipment 115 sprays intermediary's heat transferring medium uniformly in tiny droplet, from top to bottom by spray Space 114, composite filling component 113 are drenched, the heat and mass for carrying out direct contact type with flue gas exchanges, and is finally collected at heat exchanging chamber In intermediary's heat transferring medium header of 112 bottoms, afterheat utilizing system 5 then is flowed to by intermediary's heat transferring medium outlet 116, so Realize the recycling of intermediary's heat transferring medium.
In addition, forming condensed water due to being cooled down containing vapor by intermediary's heat transferring medium in flue gas, fall to heat exchange main body 11 bottoms, extra intermediary's heat transferring medium can pass through 32 outlet of intermediary's heat transferring medium outlet pipe.
Intermediary's heat transferring medium not only makes the temperature liter of intermediary's heat transferring medium during with smoke contacts heat and mass High and intermediary's heat transferring medium amount increases, but also absorbs acidic materials (such as SO in part in flue gas2And NOx) and dust.Such as figure 1, shown in Fig. 2, system corrosion and qualified discharge, are provided with and add alkali system 4 in order to prevent, and adding alkali system 4 includes lye tank 42, control Device 40 processed plus alkali pipe-line system 41 plus alkali pump 43 and lye tank heating device 44.The setting of lye tank 42 of the present embodiment is exchanging heat In main body 11, lye tank 42 can also in addition be separately provided.In the process of running, add alkali controller 40 according to intermediary's heat transferring medium PH value control plus alkali pump 43 and plus alkali pipe-line system 41, suitable lye is added into intermediary's heat transferring medium outlet pipe 31 and ties up The pH value of intermediary's heat transferring medium is held as neutral or alkalescent.Under special circumstances it is also possible that the pH value of intermediary's heat transferring medium For faintly acid, but system and pipe-line system etc. should have relevant anti-corrosion measure.Lye tank heating device 44 can prevent lye Low temperature crystallization etc. improves the stability and reliability of system.
Therefore, flue gas waste heat recovery apparatus 100 of the invention, not only realizes the high efficiente callback of fume afterheat, Er Qieneng The discharge of NOx and SOx etc. is enough substantially reduced, while the intermediary's heat transferring medium sprayed can effectively reduce the row of dust particles in flue gas It puts, obtains the environment protecting of good economic benefit and flue gas minimum discharge.
Further, as shown in Figure 1, Figure 2 and Figure 3, flue gas enters the outlet of flaring channel part 12 and effective stream of import Logical area ratio is 2.7:1；The valid circulation area ratio of tapered channels portion 13 is discharged in flue gas outlet and import is 1:2.5.This reality The flue gas for applying example enters flaring channel part 12 and flue gas discharge tapered channels portion 13 and uses the structure of gradually variable diameter, can be effectively The flow resistance of flue gas is reduced, the sudden expansion sudden contraction structure generallyd use compared with the existing technology can reduce flue gas drag overall 20% or more.
Optionally, it is 1.5:1 that flue gas, which enters the outlet of flaring channel part 12 and the range of the valid circulation area ratio of import, To 6:1；It is 1:6 to 1:1.5 that the outlet in tapered channels portion 13 and the range of the valid circulation area ratio of import, which is discharged, in flue gas.By This, the flaring and tapered configuration that can efficiently use the inlet and outlet of flue gas reduce smoke flow resistance.
Further, as shown in Figure 1, Figure 2 and Figure 3, the main body 11 that exchanges heat is mounted on flue gas and enters flaring channel part 12 and cigarette Gas is discharged between tapered channels portion 13, can be used as a part of flue, that is, the heat exchange main body 11 of the present embodiment does not change The inlet and outlet of the arrangement of former flue, heat exchange main body 11 can be located separately two opposite flanks of heat exchange main body 11, as shown in figure 5, And enter flaring channel part 12 and flue gas discharge tapered channels portion 13 with flue gas respectively to dock.The smoke entrance is arranged to original There is equipment and pipe system to influence small, takes up an area smaller and investment and more save.It is shown in fig. 5 heat exchange main body 11 smoke entrance be It is rectangular, or circle etc..
Further, as shown in Fig. 2, Fig. 3 and Fig. 5, the main carriers of heat-exchanging component 1 --- composite filling component 113 Flue gas entering surface the gross area (i.e. the area of the lower surface of composite filling component 113 and composite filling component 113 with the second son The area of the opposite side of import 1182) it with the ratio of 118 cross-sectional area of gas inlet of heat-exchanging component 1 is 7.5:1, referred to as For filler inlet face flare factor.
Optionally, filler inlet face flare factor may range from 4:1 to 15:1.Filler inlet face flare factor mistake Greatly, it is easy to keep the equipment volume of heat-exchanging component 1 excessive, thus will increase equipment investment, and filler inlet face flare factor is too small The contact heat-exchanging performance for then easily causing flue gas and intermediary's heat transferring medium is insufficient, smoke flow resistance can be made to obviously increase.
Further, as shown in Fig. 2, Fig. 3 and Fig. 6, enter the stream in composite filling component 113 further to improve flue gas Field uniformity and flue gas enter the composite filling component of 12 side of flaring channel part in close flue gas in the consistency in exit 113 lower fronts are provided with the second sub- import 1182.Most of flue gas from the first sub- import 1181 flow into heat exchanging chamber 112 after from changing The lower surface of composite filling component 113 flows upwardly into, and fraction flue gas is directly from the second son of the side of composite filling component 113 Import 1182 flows into.The h/H of the present embodiment is about that the excessive too small improvement flue gas that is all unfavorable for of 1/3, h/H enters composite filling group The consistency of flow field uniformity and flue-gas temperature in part 113 in exit.
Further, as shown in fig. 6, composite filling component 113 can be further by being arranged two or more (figure In be not shown), the filler distribution of different surfaces product improves even flow field and cigarette of the flue gas in packing layer in different regions The consistency of the flue-gas temperature of gas outlet 119, in the lower region of flue gas flow rate (region for such as closing on the second sub- import 1182) The filler assembly of small specific surface product is placed, or places the filler assembly of bigger serface (such as in the higher region of flue gas flow rate Region far from the second sub- import 1182).As shown in fig. 6, if the main body filler assembly of composite filling component 113 is the first combination The second composite filling 1132 of the different specific surface areas of different-thickness is such as arranged in filler 1131 by ladder, wherein the second combination The specific surface area of filler 1132 can further be effectively improved flue gas in packing layer less than the specific surface area of the first composite filling 1131 The consistency of the flue-gas temperature of interior flow field uniformity and exhanst gas outlet 119, so as to further be effectively improved flue gas in The contact heat-exchanging performance of Jie's heat transferring medium.
Further, as shown in Figure 1, flue system can be not provided with flue gas booster fan according to the case where boiler 23, flue gas booster fan 23 also can be set, as shown in Figure 8 and Figure 9.Pressurization set by flue system shown in Fig. 8 Blower 23 is located on the flue gas inlet pipe 21 of heat-exchanging component 1.Booster fan 23 set by flue system shown in Fig. 9 is located at In the flue gas outlet pipe 22 of heat-exchanging component 1.
In the present embodiment, smoke flow resistance is not only significantly reduced due to the above structure, it can than the prior art Smoke flow resistance 20% to 50% is reduced, and significantly improves the contact heat-exchanging performance of flue gas Yu intermediary's heat transferring medium, this The end of the heat-exchanging component 1 of embodiment is poor (temperature difference of intermediary's water i.e. at exiting flue gas and intermediary's heat transferring medium import 117) It is 1 DEG C or so, far below the end at end poor (generally 5 DEG C -10 DEG C) and dividing wall type flue gas heat-exchange unit that void tower is sprayed heat exchanger Poor (such as fin-tube type, generally 20 DEG C -30 DEG C), in the case of identical exhaust gas volumn, the heat-exchanging component 1 of the present embodiment can generally recycle more 20% or more fume afterheat, waste heat recovering energy conserving economic benefit more preferably, can effectively eliminate phenomena such as discharging white cigarette, environmental-protecting performance is more It is excellent.Meanwhile the power consumption of boiler fan or the pipe pressurizing blower 23 of setting significantly reduces, the cigarette of smoke waste heat utilization system 5 Gas conveying power consumption can generally reduce 30%-50% or so；And the temperature rise of intermediary's heat transferring medium can significantly improve in heat-exchanging component 1 (generally can be improved 5 DEG C -10 DEG C) can not only be obviously improved the performance of afterheat utilizing system 5, but also intermediary's heat transferring medium is defeated It send power consumption that (while significantly reducing intermediary's heat transferring medium flow and flow resistance) is greatly reduced, can generally reduce by 50% or more.
Therefore, because the above structure feature of the heat-exchanging component 1 of the present embodiment, has heat-exchanging component 1 significant Efficient, low-resistance and compact characteristic, and the exhaust gas volumn of the system under identical waste heat recovering state and intermediary's heat transferring medium amount It significantly reduces, but also the performance of associated other major process units and pipe-line system etc. also has significant section Energy, low consumption characteristic.
According to embodiments of the present invention two flue gas waste heat recovery apparatus 100 is described below with reference to Figure 14 and Figure 15.
As shown in Figure 14 and Figure 15, the flue gas waste heat recovery apparatus 100 of embodiment two is returned with fume afterheat in embodiment one 100 structure of receiving apparatus is substantially the same, and something in common repeats no more, and one of main difference is, the heat-exchanging component 1 in embodiment two Smoke entrance direction and its associated components (such as flue gas enters flaring channel part 12 and flue gas and tapered channels portion 13 is discharged) Relative position it is different, as shown in figure 14, the smoke entrance direction of the heat-exchanging component 1 in embodiment two is on top view 90 ° of angle settings；And the smoke entrance direction of the heat-exchanging component 1 in embodiment one is arranged on top view in 180 ° of angles. The two does not have difference in performance, and the setting direction of the two is differently depending on live real space position and original flue Setting.
In addition, the two of main difference are, the horizontal middle section of the composite filling component 113 in embodiment one is rectangular (i.e. quadrangle), and in embodiment two, as shown in figure 15, the horizontal middle section of composite filling component 113 is chamfering rectangular (i.e. six Side shape).The flue gas of the composite filling component 113 of embodiment two and the heat exchange property of intermediary's heat transferring medium are slightly strong, but difference is unknown It is aobvious.
Figure 16 and Figure 17 shows according to embodiments of the present invention three flue gas waste heat recovery apparatus 100.In embodiment three A kind of flue gas waste heat recovery apparatus 100 is substantially the same, here not with 100 structure of flue gas waste heat recovery apparatus in embodiment one It repeats again.
Main difference first is that, the smoke entrance direction of the heat-exchanging component 1 of embodiment three and its associated components (such as cigarette Gas enters flaring channel part 12 and flue gas discharge tapered channels portion 13 etc.) relative position it is different, as shown in figure 16, embodiment three The smoke entrance direction of middle heat-exchanging component 1 on main view in the setting of 90 ° of angles, and in embodiment one heat-exchanging component 1 cigarette Gas imports and exports direction on top view in 180 ° of angle settings.In the embodiment three shown in Figure 16, the flue gas of heat-exchanging component 1 goes out 119 directions of mouth are upward, and are connected with chimney 24, and flue gas directly passes through 24 row of chimney to atmosphere.The two is not poor in performance Not, the setting direction of the two is differently depending on the real space position at scene and the setting of original flue.
In addition, main difference second is that, the horizontal middle section of the composite filling component 113 of embodiment one be it is rectangular (i.e. Quadrangle), and in embodiment three, as shown in figure 17, the horizontal middle section of composite filling component 113 is rectangular (i.e. eight sides of chamfering Shape).The flue gas of the composite filling component 113 of embodiment three and the heat exchange property of intermediary's heat transferring medium are slightly strong, but difference is unobvious.
In conclusion the compact flue gas depth waste-heat recovery device 100 of the low-resistance of the embodiment of the present invention, has the advantage that
1, the low-resistance characteristic of flue gas conveying:
13 structure of tapered channels portion is discharged in flue gas due to entering flaring channel part 12 and decrement using the flue gas for subtracting expansion, can To be effectively reduced the resistance of flow of flue gas, the mutual conversion of kinetic energy and pressure energy is effectively realized, so as to effectively drop Flow resistance of the low flue gas in the process for flowing into and out heat-exchanging component 1.Due to entering flaring channel using the flue gas for subtracting expansion Portion 12, and be provided with the first sub- import 1181 with the side wall face of composite filling component 113 and be located at the first sub- import Second sub- import 1182 of 1181 lower sections, and composite filling component 113 is set as including that at least two specific surface areas are unused Filler avoids asking for the flue gas bias current even reflux of the prior art so that velocity of flue gas is more uniformly spread in heat-exchanging component 1 Topic, to significantly reduce flue gas in the flow resistance with intermediary heat transferring medium transmission of heat by contact mass transport process；Due to using Above structure can be under identical waste heat recovering state but also the heat exchange of flue gas and intermediary heat transferring medium significantly increases, correspondingly It is substantially reduced exhaust gas volumn, so that the smoke flow resistance under the conditions of identical waste heat recycling can also be substantially reduced.Relative to existing The flue gas conveying power consumption of technology, flue gas depth afterheat utilizing system 5 can generally reduce 30%-50% or so.
2, the low power consumption characteristic of intermediary's heat transferring medium conveying
Due to significantly increasing flue gas and the heat exchange of intermediary heat transferring medium, intermediary's heat transferring medium is being changed Temperature rise in hot component 1 can significantly improve, and generally can be improved 5 DEG C -10 DEG C, and intermediary's heat transferring medium not only can be significantly reduced Flow also also reduces intermediary's heat transferring medium flow resistance simultaneously, so as to significantly reduce the flow resistance of intermediary's heat transferring medium With conveying power consumption.Compared with the existing technology, general intermediary's heat transferring medium conveying power consumption can reduce by 50% or more.
3, flue gas waste heat recovery high-efficient characteristic:
Flaring channel part 12 is entered using the flue gas for subtracting expansion due to using, provided with the side with composite filling component 113 The sub- import 1181 of the first of wall face and the second sub- import 1182 below the first sub- import 1181, and composite filling group The filler different using at least two specific surface areas of part 113, so that velocity of flue gas distributing homogeneity and flue gas go out in heat-exchanging component 1 The consistency of 119 temperature of mouth more preferably, the problem of avoiding the flue gas bias current of the prior art or even flow back, also significantly enhances cigarette The transmission of heat by contact mass-transfer performance of gas and intermediary's heat transferring medium can make the end difference i.e. exiting flue gas of heat-exchanging component 1 and intermediary's heat exchange be situated between 117 temperature difference of matter import is even lower up to 1 DEG C or so, poor (generally 5 DEG C -10 DEG C) far below the end that void tower is sprayed heat exchanger And dividing wall type flue gas heat-exchange unit (such as fin-tube type, generally 20 DEG C -30 DEG C), it can generally recycle cigarette in the case of identical exhaust gas volumn more 20% or more gas waste heat, device by utilizing waste heat recycle energysaving effectiveness more preferably, while also having more preferably further desulphurization denitration Dedusting characteristic, can effectively eliminate the white cigarette phenomenon of chimney 24, and the environmental-protecting performance of flue gas emission is more excellent.
4, flue gas waste heat recovery system compact nature:
Since the horizontal middle section of the composite filling component 113 in heat-exchanging component 1 is rectangular or chamfering square structure, with And the setting in the inlet and outlet direction of flue gas can be arranged according to flue and be adjusted, and can not change the arrangement of former flue, its main feature is that Heat exchanger structure is compact, can save equipment land occupation 10%-20% or so compared with the existing technology；On especially since Stating flue gas waste heat recovery apparatus 100 has excellent low-resistance characteristic and high-efficient characteristic, in identical flue gas waste heat recovery, Flue gas and heat-exchanging component 1 and other associated process equipments and pipe-line system etc. all have more compact characteristic, not only device It takes up little area, equipment and pipe-line system are more smart small, and investment repayment is more excellent.In general, compared with the existing technology, in identical flue gas Under waste heat recovering state, the compact flue gas depth waste-heat recovery device 100 of the low-resistance of the embodiment of the present invention can save equipment land occupation 20% or more, it can reduce investment outlay 30% or more.
5, characteristic of low cost
Due to above-mentioned flue gas waste heat recovery high-efficient characteristic, flue gas convey low-resistance characteristic, intermediary's heat transferring medium conveying it is low Power consumption characteristics and flue gas waste heat recovery system compact nature significantly reduce the investment of flue gas waste heat recovery system, and And significantly improve flue gas waste heat recovery performance, and the flue gas conveying power consumption of flue gas waste heat recovery operation, intermediary's water are defeated Power consumption is sent to significantly reduce, the reliability and stability of system also significantly improve, to improve flue gas waste heat recovery significantly Energy-conserving and environment-protective performance, can be with save the cost.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", etc. terms answer It is interpreted broadly, for example, it may be being fixedly connected, may be a detachable connection, or is integral；It can be mechanical connection, It can be electrical connection or can communicate each other；It can be directly connected, two can also be can be indirectly connected through an intermediary The interaction relationship of connection or two elements inside element, unless otherwise restricted clearly.For the common skill of this field For art personnel, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
In the description of this specification, reference term " embodiment ", " specific embodiment ", " example " or " specific example " etc. Description mean particular features, structures, materials, or characteristics described in conjunction with this embodiment or example be contained in it is of the invention extremely In few one embodiment or example.In the present specification, schematic expression of the above terms are necessarily directed to identical Embodiment or example.Moreover, particular features, structures, materials, or characteristics described can in any one or more embodiments or It can be combined in any suitable manner in example.In addition, without conflicting with each other, those skilled in the art can illustrate this The feature of different embodiments or examples and different embodiments or examples described in book is combined.

Claims (10)

1. a kind of compact flue gas depth waste-heat recovery device of low-resistance characterized by comprising
Exchange heat main body, and heat exchanging chamber is formed in the heat exchange main body, and the heat exchanging chamber has gas inlet, exhanst gas outlet, intermediary Heat transferring medium import and the outlet of intermediary's heat transferring medium, the exhanst gas outlet is located at the top or side of the heat exchange main body, described Gas inlet is located at the side of the heat exchange main body and including the first sub- import and the second sub- import, intermediary's heat transferring medium into Mouth is located at the top of heat exchanging chamber, and intermediary's heat transferring medium outlet is located at the lower part of heat exchanging chamber；
Spray equipment, the spray equipment be located in the heat exchanging chamber and with intermediary's heat transferring medium inlet communication, to pass through The spray equipment sprays into intermediary's heat transferring medium into the heat exchanging chamber；
Composite filling component, the composite filling component are located in the heat exchanging chamber, the lower section of the spray equipment and be located at institute It states between gas inlet and the exhanst gas outlet, the second sub- import connects the side wall of the composite filling component, and described One sub- import is located at below the described second sub- import and is lower than the composite filling component, and flue gas enters institute from the gas inlet Heat exchanging chamber is stated, flue gas is flowed from bottom to top in the composite filling component and sprayed from top to bottom with by the spray equipment Intermediary's heat transferring medium of flowing carries out contact caloic exchange；
Flue gas enters flaring flow path portion, and one end that the flue gas enters flaring flow path portion is connected and in flue gas with the gas inlet Flow direction on at least partly described flue gas enter flaring flow path portion cross-sectional area be incremented by；
Tapered flow path portion is discharged in flue gas, and one end that tapered flow path portion is discharged in the flue gas is connected and in flue gas with the exhanst gas outlet Flow direction at least partly described flue gas cross-sectional area that tapered flow path portion is discharged successively decrease；
Afterheat utilizing system, the afterheat utilizing system respectively with intermediary's heat transferring medium import and intermediary's heat transferring medium Outlet is connected to recycle the heat of intermediary's heat transferring medium.
2. the compact flue gas depth waste-heat recovery device of low-resistance according to claim 1, which is characterized in that it is described first son into Mouthful and the described second sub- inlet communication, and the size h that extends in vertical direction of the second sub- import and the composite filling group The height of part and the ratio of H are 1/10 to 1/2.
3. the compact flue gas depth waste-heat recovery device of low-resistance according to claim 1, which is characterized in that the heat exchanging chamber shape As substantially cuboid, the gas inlet and the exhanst gas outlet are located at relative or neighbor two side of the heat exchanging chamber On.
4. the compact flue gas depth waste-heat recovery device of low-resistance according to claim 1, which is characterized in that the composite filling Component includes the different filler of at least two specific surface areas, and wherein the small filler of specific surface area is located at the described second sub- entrance.
5. the compact flue gas depth waste-heat recovery device of low-resistance according to claim 1, which is characterized in that further include:
Intermediary's heat transferring medium pipe-line system, intermediary's heat transferring medium pipe-line system are separately connected intermediary's heat transferring medium outlet With intermediary's heat transferring medium import, intermediary's heat transferring medium is exported from intermediary's heat transferring medium to flow out, through the UTILIZATION OF VESIDUAL HEAT IN After system cooling, intermediary's heat transferring medium import is flowed to, intermediary's heat transferring medium pipe-line system includes:
Intermediary's heat transferring medium outlet pipe, one end of intermediary's heat transferring medium outlet pipe and intermediary's heat transferring medium outlet and another One end is connected with afterheat utilizing system；
One end of intermediary's heat transferring medium inlet pipe, intermediary's heat transferring medium inlet pipe is connected with afterheat utilizing system and the other end and institute Intermediary's heat transferring medium inlet communication is stated, so that intermediary's heat transferring medium is discharged after heat cools down in afterheat utilizing system through institute It states intermediary's heat transferring medium inlet pipe and flow to the spray equipment；
Intermediary's heat transferring medium pump, intermediary's heat transferring medium pump are located in intermediary's heat transferring medium outlet pipe.
6. the compact flue gas depth waste-heat recovery device of low-resistance according to claim 5, which is characterized in that further include:
Add alkali system, described plus alkali system is connected to add into intermediary's heat transferring medium with intermediary's heat transferring medium outlet pipe Lye is to adjust the pH value of intermediary's heat transferring medium.
7. the compact flue gas depth waste-heat recovery device of low-resistance according to claim 6, which is characterized in that described plus alkali system Include:
For storing the lye tank of the lye；
Add alkali pipe-line system, described plus alkali pipe-line system one end is connected with the lye tank and the other end and the intermediary exchange heat Media outlet connection；
Controller, the controller are connected to control the on-off of described plus alkali pipe-line system with described plus alkali pipe-line system；
Add alkali pump, described plus alkali pump is located in described plus alkali pipe-line system and is connected with the controller in the controller Control lower start and stop；
For heating the heating device of the lye, the heating device includes the lye heat tracing heat transfer unit being located in lye tank The lye heat tracing inlet pipeline and lye heat tracing outlet conduit being connected with the lye heat tracing heat transfer unit.
8. the compact flue gas depth waste-heat recovery device of low-resistance according to claim 7, which is characterized in that the lye tank is set In the heat exchange main body.
9. the compact flue gas depth waste-heat recovery device of low-resistance according to claim 1, which is characterized in that further include:
Dehydrater, the dehydrater is located in the heat exchange main body and the neighbouring exhanst gas outlet.
10. the compact flue gas depth waste-heat recovery device of low-resistance according to claim 1, which is characterized in that the waste heat benefit It is heat pump or waste heat utilization heat exchanger with system.
CN201710161042.7A 2017-03-17 2017-03-17 The compact flue gas depth waste-heat recovery device of low-resistance Expired - Fee Related CN107101218B (en)

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GB2402085A (en) * 2002-03-01 2004-12-01 Oiko Group Ltd Device for removing pollutants from exhaust gases
CN101306318A (en) * 2008-02-14 2008-11-19 娄爱娟 Tower top discharge type flue gas desulfurization method and desulfurization tower
CN102980198B (en) * 2012-12-21 2015-04-22 哈尔滨工业大学 Washing condensing smoke triple recovery device
CN204478118U (en) * 2015-03-17 2015-07-15 刘�东 Gas cleaning waste-heat recovery device
CN204786502U (en) * 2015-06-24 2015-11-18 北京源深节能技术有限责任公司 System for residual heat from flue gas
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CN205037334U (en) * 2015-10-13 2016-02-17 北京建筑大学 Residual heat from flue gas utilizes system
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CN205065764U (en) * 2015-10-19 2016-03-02 北京建筑大学 Fountain residual heat from flue gas device
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