CN108980815A - A kind of flue gas heat recovery system and method that combustion gas generates - Google Patents
A kind of flue gas heat recovery system and method that combustion gas generates Download PDFInfo
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- CN108980815A CN108980815A CN201810947350.7A CN201810947350A CN108980815A CN 108980815 A CN108980815 A CN 108980815A CN 201810947350 A CN201810947350 A CN 201810947350A CN 108980815 A CN108980815 A CN 108980815A
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 227
- 239000003546 flue gas Substances 0.000 title claims abstract description 203
- 239000000567 combustion gas Substances 0.000 title claims abstract description 44
- 238000011084 recovery Methods 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 277
- 239000006096 absorbing agent Substances 0.000 claims abstract description 100
- 238000005507 spraying Methods 0.000 claims abstract description 47
- 230000008676 import Effects 0.000 claims abstract description 41
- 239000002918 waste heat Substances 0.000 claims abstract description 15
- 239000007921 spray Substances 0.000 claims description 67
- 239000007788 liquid Substances 0.000 claims description 56
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims description 51
- 239000012530 fluid Substances 0.000 claims description 47
- 238000010438 heat treatment Methods 0.000 claims description 29
- 238000010521 absorption reaction Methods 0.000 claims description 23
- 238000007791 dehumidification Methods 0.000 claims description 18
- 238000009833 condensation Methods 0.000 claims description 13
- 230000005494 condensation Effects 0.000 claims description 13
- 230000015572 biosynthetic process Effects 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 12
- AMXOYNBUYSYVKV-UHFFFAOYSA-M lithium bromide Chemical compound [Li+].[Br-] AMXOYNBUYSYVKV-UHFFFAOYSA-M 0.000 claims description 8
- 125000004122 cyclic group Chemical group 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- 230000002411 adverse Effects 0.000 claims description 5
- 238000001704 evaporation Methods 0.000 claims description 4
- 230000008020 evaporation Effects 0.000 claims description 4
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 2
- 239000001110 calcium chloride Substances 0.000 claims description 2
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 2
- 238000004064 recycling Methods 0.000 abstract description 4
- 238000009834 vaporization Methods 0.000 abstract description 4
- 230000008016 vaporization Effects 0.000 abstract description 4
- 239000000243 solution Substances 0.000 description 126
- 239000007789 gas Substances 0.000 description 37
- 239000003595 mist Substances 0.000 description 5
- 239000000779 smoke Substances 0.000 description 5
- 239000003517 fume Substances 0.000 description 4
- 238000002386 leaching Methods 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- 239000012141 concentrate Substances 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 239000003345 natural gas Substances 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 238000005660 chlorination reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000002453 shampoo Substances 0.000 description 2
- 238000010025 steaming Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
Classifications
-
- 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
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/08—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being otherwise bent, e.g. in a serpentine or zig-zag
- F28D7/082—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being otherwise bent, e.g. in a serpentine or zig-zag with serpentine or zig-zag configuration
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D11/00—Feed-water supply not provided for in other main groups
- F22D11/02—Arrangements of feed-water pumps
- F22D11/06—Arrangements of feed-water pumps for returning condensate to boiler
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28C—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA COME INTO DIRECT CONTACT WITHOUT CHEMICAL INTERACTION
- F28C3/00—Other direct-contact heat-exchange apparatus
- F28C3/06—Other direct-contact heat-exchange apparatus the heat-exchange media being a liquid and a gas or vapour
- F28C3/08—Other direct-contact heat-exchange apparatus the heat-exchange media being a liquid and a gas or vapour with change of state, e.g. absorption, evaporation, condensation
-
- 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)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Water Supply & Treatment (AREA)
- Treating Waste Gases (AREA)
- Sorption Type Refrigeration Machines (AREA)
Abstract
The present invention relates to a kind of waste heat recycling system, flue gas heat recovery system and method that especially a kind of combustion gas generates.This system includes through the sequentially connected generator of flue (1), condenser (2), absorber (3), the absorber (3) is also connected with solution-water heat exchanger (4) by the road, solution-water heat exchanger (4) is also connect with generator (1) by the road, and the taphole of absorber (3) is connect with the weak solution spraying mechanism import of generator (1) by the road.This system structure is simple, stability is high, is easy to the upgrading of existing system, can either the recovered flue gas latent heat of vaporization can recycle condensed water again, cost of investment is low and occupied area is small.Meanwhile a kind of method of the flue gas heat recovery system generated the present invention also provides combustion gas, the security and stability of system is improved, heat exchange efficiency is also greatly improved.
Description
Technical field
The present invention relates to a kind of waste heat recycling system, especially a kind of flue gas heat recovery system of combustion gas generation
System and method.
Background technique
Contain a large amount of vapor in the waste heat flue gas of outlet after combustion of natural gas acting, and the vapor in flue gas contains
Amount is higher, and the flue gas condensing heat contained is bigger, and the economic value of recycling is bigger.1Nm3Natural gas can produce in completely burned
The vapor of about 1.55Kg, the latent heat of vaporization contained about 3.6MJ, accounts for 1Nm310% or so of natural gas low heat valve.Root
According to the application study of Practical Project, 90 DEG C -130 DEG C of the exhaust gas temperature of gas fired-boiler, Gas-steam Combined Cycle power plant, combustion gas
The high-temperature flue gas of cooling-heating treatment system is after utilizing, and exhaust gas temperature is still between 90 DEG C -150 DEG C, recyclable cigarette
Gas excess heat is still very big.By special technological means Mist heat recovering and condensed water, the energy is improved for energy supplying system
Utilization efficiency reduces the waste of energy quality, and it is very big to promote environmental protection characteristic value.Current waste heat recovery device is directed to combustion gas
The flue gas waste heat recovery of distributed combined supply system is not applied well, such as residual heat from boiler fume conventional at present recycles dress
The return water for heating heat supply network by heat exchanger Mist heat recovering is set, but the vapor for accounting for fume afterheat large percentage can not be recycled
Latent heat, cannot be considered in terms of economical with energy-efficient dual indexes；And the return water of heat supply network is heated by heat pump Mist heat recovering, it can be with
The latent heat of vaporization and condensed water are recycled, but it is larger to invest high and land occupation.In view of these problems as above, the energy conservation for taking into account system is returned
Report rate and investment economy need to design a kind of flue gas heat recovery system and method that novel gas generates.
Summary of the invention
The object of the present invention is to provide the flue gas heat recovery system that a kind of combustion gas generates, system structure is simple,
Stability is high, is easy to the upgrading of existing system, can either the recovered flue gas latent heat of vaporization can recycle condensed water, cost of investment again
Low and occupied area is small；Meanwhile a kind of method of the flue gas heat recovery system generated the present invention also provides combustion gas, it mentions
The high security and stability of system, is also greatly improved heat exchange efficiency.
In order to solve the above technical problems, the present invention adopts the following technical scheme that:
The flue gas heat recovery system that a kind of combustion gas generates include through the sequentially connected generator of flue, condenser,
Absorber, the absorber are also connected with solution-water heat exchanger by the road, the solution-water heat exchanger also by the road with
Generator connection, the taphole of the absorber are connect with the weak solution spraying mechanism import of generator by the road.Specifically,
The exhanst gas outlet of the connection of the gas inlet of waste heat flue and generator, generator connects through the gas inlet of flue and condenser
It connects, the exhanst gas outlet of condenser is connected through the gas inlet of flue and absorber, to form flue gas heat exchange access.Meanwhile occurring
The concentrated solution outlet of device is connect with the concentrated solution import of solution-water heat exchanger by the road, solution-water heat exchanger concentrated solution
Outlet connect by the road with the solution inlet port of absorber, the taphole of absorber by the road with the weak solution spray thrower of generator
Structure import connection, forms the circulation loop of solution.
The flue gas heat recovery system that combustion gas above-mentioned generates further includes solution spraying pump and solution circulation pump, described
Solution spraying pump is installed on the connecting line between absorber and solution-water heat exchanger, the generator and absorber it
Between connecting line on solution circulation pump is installed.Specifically, the concentrated solution outlet of generator is dense with solution-water heat exchanger
Solution inlet port connection, the outlet of solution-water heat exchanger concentrated solution is pumped by solution spraying to be connect with absorber solution inlet port, is inhaled
The taphole for receiving device is connected by the weak solution spraying mechanism import of solution circulation pump and generator, forms being recycled back to for solution
Road.
The flue gas heat recovery system that combustion gas above-mentioned generates further include water-water heat exchanger, hot water return pipe A,
The condensate outlet of hot water feeding pipe B, the condenser are connect with the condensate import of water-water heat exchanger by the road, water-hydrothermal exchange
The condensate outlet of device is connect with the condensate spraying mechanism import in condenser by the road；Hot water return pipe A is changed with water-water by the road
The hot water inlet of hot device connects, and the hot water outlet of water-water heat exchanger is connect with the import of solution-water- to-water heat exchanger by the road, solution-
The hot water outlet of water- to-water heat exchanger is connect with hot water feeding pipe B by the road, to form heating pipeline.Hot water return pipe A in this system
It can be single channel with water-water heat exchanger, solution-water heat exchanger connection type and connect.
The flue gas heat recovery system that combustion gas above-mentioned generates further include water-water heat exchanger, hot water return pipe A,
The condensate outlet of hot water feeding pipe B, the condenser are connect with the condensate import of water-water heat exchanger by the road, water-hydrothermal exchange
The condensate outlet of device is connect with the condensate spraying mechanism import in condenser by the road；Hot water return pipe A is changed with water-water by the road
The hot water inlet of hot device connects, and the hot water outlet of water-water heat exchanger is connect with hot water feeding pipe B by the road；Hot water return pipe A warp
Pipeline is connect with solution-water- to-water heat exchanger hot water inlet, solution-water- to-water heat exchanger hot water outlet by the road with hot water feeding pipe B
Connection.Hot water return pipe A and water-water heat exchanger, solution-water heat exchanger connection type are also possible to two-way in this system
It is in parallel.Hot water return pipe A is connect with the import of solution heat exchanger, water-water heat exchanger, and hot water feeding pipe B and solution heat are handed over
The outlet connection of parallel operation, water-water heat exchanger, constitutes hot water heating pipeline.
The flue gas heat recovery system that combustion gas above-mentioned generates, condensate outlet and the water-hydro-thermal of the condenser are handed over
Condensate spray pump is also equipped on connecting line between the condensate import of parallel operation.Specifically, the condensate outlet of condenser passes through
The condensate import of condensate spray pump and water-water heat exchanger connects, condensate outlet and the condensate in condenser of water-water heat exchanger
Spraying mechanism import connection, to form condensed water heat exchange cycle circuit.
The flue gas heat recovery system that combustion gas above-mentioned generates, the generator, condenser, in absorber flue gas with
The liquid form of spray liquid is flue gas adverse current and goes up, the catadromous vertical reverse flow of spray liquid or flue gas and spray liquid
Perhaps flue gas and the horizontal co-flow of spray liquid or flue gas and spray liquid are inverse vertically for horizontal reverse flow, vertical co-flow
To eddy flow, perhaps flue gas and spray liquid eddy flow in the same direction or flue gas and spray liquid cross-mixing one of flow or a variety of.This
In system, to guarantee heat exchange sufficiently in generator, condenser and absorber, the liquid form of flue gas and spray liquid can be inverse
Stream, cocurrent flow, mixed flow, eddy flow it is one or more, it is not limited to vertical this kind of form of reverse flow, and in a device
A variety of types of flow can also be inside used simultaneously, and liquid form of the same race, which can be used, in different device can also use different flowing shapes
Formula.
The quantity of the flue gas heat recovery system that combustion gas above-mentioned generates, the generator is for one group or concatenated
Multiple groups；The quantity of the condenser is one group or concatenated multiple groups；The quantity of the absorber is for one group or concatenated more
Group, the quantity of the solution-water heat exchanger are one group or concatenated multiple groups.Specifically, the generator of this system can be
Single-stage generator is also possible to multi-stage generator, and the combination of multi-stage generator is the entrance company of flue gas and first-stage generator
It connects, the exhanst gas outlet of first-stage generator is connected with the entrance of second-stage generator, and so on, the flue gas of last final stage generator goes out
Mouth is connect with the smoke inlet of condenser, completes flow of flue gas.The condenser of this system can be single-stage condenser and be also possible to
Multi-stage condensing device, the combination of multi-stage condensing device are the entrance connection of flue gas and first-stage condenser, the flue gas of first-stage condenser
Outlet is connected with the entrance of secondary condenser, and so on, the exhanst gas outlet of last last condenser stage and the flue gas of absorber enter
Mouth connection, completes flow of flue gas.The absorber of this system can be single absorber stage and be also possible to multistage absorption device, multistage absorption
The combination of device is the entrance connection of flue gas and first absorber, the exhanst gas outlet of first absorber and entering for secondary absorber
Mouth connection, and so on, the exhanst gas outlet of last final stage absorber is connect with atmosphere.Solution-the water heat exchanger of this system can
To be that single-stage solution-water heat exchanger is also possible to multi-stage solution-water heat exchanger, the work of multi-stage solution-water heat exchanger
Process is: concentrated solution enters primary liquor-water heat exchanger from the outflow of first-stage generator bottom, after heat exchange outflow, into second level
Generator carries out spray heat exchange concentration, flows out from second-stage generator bottom, second level solution-is entered under the driving of solution spraying pump
Water heat exchanger exchanges heat, and so on, the concentrate solution of final stage generator outflow enters final stage solution-water heat exchanger and changes
After hot-fluid goes out, into the sprinkling equipment of absorber, solution flowing is completed.
A kind of method for the flue gas heat recovery system that combustion gas generates, the fume afterheat generated using combustion gas above-mentioned
Recycling system, workflow are as follows:
S1, the high-temperature flue gas y1 that the water capacity in waste heat flue is 80g/kg-150g/kg enter generator (wherein
Water capacity refers to the water vapour quality being mixed in the wet flue gas containing dry flue gas), flue gas is from below to up in generator
Flowing, weak solution are sprayed down by weak solution spraying mechanism, make flue gas and weak solution direct contact heat transfer, weak solution is in high temperature
Evaporate vapor under the heating of flue gas y1, it is pyrosol r1 that temperature is 50 DEG C -80 DEG C that spray and lower weak solution, which are concentrated,
It is flowed out from the bottom of generator, after solution-water heat exchanger heat exchange is entered under the driving of solution spraying pump, formation temperature 35
DEG C -60 DEG C of middle cryogenic fluid r2 is flowed into absorber, and it is 95g/ that high-temperature flue gas y1, which is mixed into evaporation vapor to become water capacity,
The high-humidity flue gas y2 of kg-1200g/kg；
S2, high-humidity flue gas the y2 discharge at the top of generator flow into condenser, spray in high-humidity flue gas y2 and condenser
Leaching and lower condensed water n1 direct contact heat transfer become water capacity as 210g/kg- after high-humidity flue gas y2 heat release cooling and dehumidification
Part Water vapor condensation is that liquid water is mixed with condensed water n1 in the middle humidity flue gas y3 of 400g/kg, high-humidity flue gas y2, is condensed
Water n1 is gathered in the bottom of condenser after the completion of heat exchange, and a part of condensed water n1 is under the driving of condensate spray pump, into water-
Heat absorption heating in condenser is continued back at after water heat exchanger heat release cooling, is looped back and forth like this, the condensed water n1 of remainder
It is recycled；
S3, middle humidity flue gas y3 subsequently enter absorber, after the solution tank of absorber collects solution-water heat exchanger heat exchange
Middle cryogenic fluid r2, middle humidity flue gas y3 enters from the bottom of solution tank, sufficiently exchanges heat after dehumidification with middle cryogenic fluid r2, again
With sprayed in absorber and under concentrated solution carry out heat exchange dehumidification formation temperature be 30 DEG C -45 DEG C, water capacity 10g/kg-80g/
The low humidity flue gas y4 discharge system of kg；
S4, middle cryogenic fluid r2 in middle humidity flue gas y3 condense after liquid water mix become temperature be 35 DEG C -45 DEG C
Cryogenic fluid r3, cryogenic fluid r3 under the action of solution circulation pump into generator weak solution spraying mechanism in, complete
The whole cyclic process of solution；
S5, the hot water of hot water return pipe A enter water-water heat exchanger heat absorption heating, then enter back into solution-water heat exchanger
Heat absorption heating, is then confessed by hot water feeding pipe B as hot water.
The method for the flue gas heat recovery system that combustion gas above-mentioned generates, workflow can be with are as follows:
S1, the high-temperature flue gas y1 that the water capacity in waste heat flue is 80g/kg-150g/kg enter generator, are sending out
The flowing of flue gas from below to up in raw device, weak solution are sprayed down by weak solution spraying mechanism, keep flue gas direct with weak solution
Contact heat-exchanging, weak solution evaporate vapor under the heating of high-temperature flue gas y1, spray and lower weak solution concentration is for temperature
50 DEG C -80 DEG C of pyrosol r1 is flowed out from the bottom of generator, and solution-hydrothermal exchange is entered under the driving of solution spraying pump
After device heat exchange, formation temperature is that 35 DEG C -60 DEG C of middle cryogenic fluid r2 is flowed into absorber, and high-temperature flue gas y1 is mixed into evaporation water
Steam becomes the high-humidity flue gas y2 that water capacity is 95g/kg-1200g/kg；
S2, high-humidity flue gas the y2 discharge at the top of generator flow into condenser, spray in high-humidity flue gas y2 and condenser
Leaching and lower condensed water n1 direct contact heat transfer become water capacity as 210g/kg- after high-humidity flue gas y2 heat release cooling and dehumidification
Part Water vapor condensation is that liquid water is mixed with condensed water n1 in the middle humidity flue gas y3 of 400g/kg, high-humidity flue gas y2, is condensed
Water n1 is gathered in the bottom of condenser after the completion of heat exchange, and a part of condensed water n1 is under the driving of condensate spray pump, into water-
Heat absorption heating in condenser is continued back at after water heat exchanger heat release cooling, is looped back and forth like this, the condensed water n1 of remainder
It is recycled；
S3, middle humidity flue gas y3 subsequently enter absorber, after the solution tank of absorber collects solution-water heat exchanger heat exchange
Middle cryogenic fluid r2, middle humidity flue gas y3 enters from the bottom of solution tank, sufficiently exchanges heat after dehumidification with middle cryogenic fluid r2, again
With sprayed in absorber and under concentrated solution carry out heat exchange dehumidification formation temperature be 30 DEG C -45 DEG C, water capacity 10g/kg-80g/
The low humidity flue gas y4 discharge system of kg；
S4, middle cryogenic fluid r2 in middle humidity flue gas y3 condense after liquid water mix become temperature be 35 DEG C -45 DEG C
Cryogenic fluid r3, cryogenic fluid r3 under the action of solution circulation pump into generator weak solution spraying mechanism in, complete
The whole cyclic process of solution；
S5, the hot water of hot water return pipe A enters water-water heat exchanger heat absorption heating, then by hot water feeding pipe B as heat
Water is confessed；The hot water of hot water return pipe A enters solution-water heat exchanger heat absorption heating simultaneously, is then supplied water by hot water
Pipe B is confessed as hot water.
Further, the method for the flue gas heat recovery system that combustion gas above-mentioned generates, the pyrosol r1, in
Cryogenic fluid r2, cryogenic fluid r3 are lithium bromide water solution or calcium chloride water.Using the salts solution for being easily melted into water,
The corrosion to flue, pipeline etc. can be avoided as far as possible, improves its service life, guarantee the stable operation of system.
Compared with prior art, the invention has the beneficial effects that:
1, in the present invention system structure is simple, stability is high, cost of investment is low and occupied area is small, is easy to existing system
Upgrading；
2, the present invention improves the using energy source effect of system by special technological means Mist heat recovering and condensed water
Rate reduces the waste of energy quality, promotes environmental protection characteristic；
3, in this system, to guarantee heat exchange sufficiently in generator, condenser and absorber, the flowing shape of flue gas and spray liquid
Formula can for adverse current, cocurrent flow, mixed flow, eddy flow it is one or more, it is not limited to reverse flow this kind of form vertically, and
A variety of types of flow can also be used simultaneously in a device, different device can be used liquid form of the same race and can also use
Different liquid forms；
4, in order to further increase the working efficiency of system, generator, condenser, absorber and solution-water heat exchanger
Quantity be one group or concatenated multiple groups；
5, the method for the flue gas heat recovery system that combustion gas generates in the present invention, can either Mist heat recovering heating
The return water of heat supply network can also recycle the latent heat for accounting for the vapor of fume afterheat large percentage, can take into account economical and energy-efficient double
Weight index, improves the security and stability of system, heat exchange efficiency is also greatly improved；
6, the solution in pipeline can avoid the corruption to flue, pipeline etc. using the salts solution for being easily melted into water as far as possible
Erosion, improves its service life, guarantees the stable operation of system.
Detailed description of the invention
Fig. 1 is a kind of work flow diagram of the invention；
Fig. 2 is another work flow diagram of the invention.
The meaning of appended drawing reference: 1- generator, 2- condenser, 3- absorber, 4- solution-water heat exchanger, 5- water-hydro-thermal
Exchanger, 6- solution spraying pump, 7- solution circulation pump, 8- condensate spray pump, A- hot water return pipe, B- hot water feeding pipe, y1- high
Warm flue gas, y2- high-humidity flue gas, humidity flue gas in y3-, y4- low humidity flue gas, r1- pyrosol, cryogenic fluid in r2-,
R3- cryogenic fluid, n1- condensed water.
The present invention is further illustrated with reference to the accompanying drawings and detailed description.
Specific embodiment
The embodiment of the present invention 1: as depicted in figs. 1 and 2, the flue gas heat recovery system that a kind of combustion gas generates includes
Through the sequentially connected generator 1 of flue, condenser 2, absorber 3, the absorber 3 is also connected with solution-hydro-thermal by the road and hands over
Parallel operation 4, the solution-water heat exchanger 4 are also connect with generator 1 by the road, the taphole of the absorber 3 by the road with
The weak solution spraying mechanism import of generator 1 connects.Specifically, waste heat flue is connect with the gas inlet of generator 1, hair
The exhanst gas outlet of raw device 1 is connect through flue with the gas inlet of condenser 2, and the exhanst gas outlet of condenser 2 is through flue and absorber 3
Gas inlet connection, to form flue gas heat exchange access.Meanwhile the concentrated solution outlet of generator 1 is handed over solution-hydro-thermal by the road
The concentrated solution import of parallel operation 4 connects, and the concentrated solution outlet of solution-water heat exchanger 4 connects with the solution inlet port of absorber 3 by the road
It connects, the taphole of absorber 3 is connect with the weak solution spraying mechanism import of generator 1 by the road, forms being recycled back to for solution
Road.The flue gas heat recovery system that combustion gas generates further includes solution spraying pump 6 and solution circulation pump 7, the absorber 3 with
Solution spraying pump 6 is installed, between the generator 1 and absorber 3 on the connecting line between solution-water heat exchanger 4
Solution circulation pump 7 is installed on connecting line.Specifically, the concentrated solution outlet of generator 1 is dense with solution-water heat exchanger 4
The concentrated solution outlet of solution inlet port connection, solution-water heat exchanger 4 is connected by solution spraying pump 6 with 3 solution inlet port of absorber
It connects, the taphole of absorber 3 is connect by solution circulation pump 7 with the weak solution spraying mechanism import of generator 1, and solution is formed
Circulation loop.
Embodiment 2: as shown in Figure 1, the flue gas heat recovery system that a kind of combustion gas generates includes sequentially connecting through flue
Generator 1, condenser 2, the absorber 3 connect, the absorber 3 is also connected with solution-water heat exchanger 4 by the road, described molten
Liquid-water heat exchanger 4 is also connect with generator 1 by the road, and the taphole of the absorber 3 is dilute with generator 1 by the road
Solution spraying mechanism import connection.Specifically, waste heat flue is connect with the gas inlet of generator 1, the flue gas of generator 1
Outlet is connect through flue with the gas inlet of condenser 2, gas inlet of the exhanst gas outlet of condenser 2 through flue Yu absorber 3
Connection, to form flue gas heat exchange access.Meanwhile the concentrated solution outlet of generator 1 is dense with solution-water heat exchanger 4 by the road
The concentrated solution outlet of solution inlet port connection, solution-water heat exchanger 4 is connect with the solution inlet port of absorber 3 by the road, absorber
3 taphole is connect with the weak solution spraying mechanism import of generator 1 by the road, forms the circulation loop of solution.Combustion gas produces
Raw flue gas heat recovery system further includes water-water heat exchanger 5, hot water return pipe A, hot water feeding pipe B, the condensation
The condensate outlet of device 2 is connect with the condensate import of water-water heat exchanger 5 by the road, and the condensate of water-water heat exchanger 5 is exported through pipe
Road is connect with the condensate spraying mechanism import in condenser 2；The hot water return pipe A hot water inlet with water-water heat exchanger 5 by the road
Connection, the hot water outlet of water-water heat exchanger 5 are connect with the import of solution-water- to-water heat exchanger 4 by the road, solution-water- to-water heat exchanger 4
Hot water outlet is connect with hot water feeding pipe B by the road, to form heating pipeline.Hot water return pipe A and water-hydro-thermal are handed in this system
Parallel operation 5, solution-water heat exchanger 4 connection type can be single channel series connection.Condensate outlet and the water-hydro-thermal of the condenser 2
Condensate spray pump 8 is also equipped on connecting line between the condensate import of exchanger 5.Specifically, the condensate of condenser 2 exports
It is connect by condensate spray pump 8 with the condensate import of water-water heat exchanger 5, condensate outlet and the condenser 2 of water-water heat exchanger 5
Interior condensate spraying mechanism import connection, to form condensed water heat exchange cycle circuit.
The flue gas heat recovery system that combustion gas generates, the generator 1, condenser 2, flue gas and spray in absorber 3
The liquid form of leaching liquid is flue gas adverse current and goes up, the catadromous vertical reverse flow of spray liquid or flue gas and spray liquid water
Perhaps flue gas and the horizontal co-flow of spray liquid or flue gas and spray liquid are reverse vertically for flat reverse flow, vertical co-flow
Perhaps flue gas and spray liquid eddy flow in the same direction or flue gas and spray liquid cross-mixing one of flow or a variety of eddy flow.This is
In system, to guarantee heat exchange sufficiently in generator 1, condenser 2 and absorber 3, the liquid form of flue gas and spray liquid can be inverse
Stream, cocurrent flow, mixed flow, eddy flow it is one or more, it is not limited to vertical this kind of form of reverse flow, and in a device
A variety of types of flow can also be inside used simultaneously, and liquid form of the same race, which can be used, in different device can also use different flowing shapes
Formula.The quantity of the generator 1 is one group or concatenated multiple groups；The quantity of the condenser 2 is for one group or concatenated more
Group；The quantity of the absorber 3 be the quantity of one group of perhaps concatenated multiple groups solution-water heat exchanger 4 be one group or
Concatenated multiple groups.Specifically, the generator 1 of this system, which can be single-stage generator, is also possible to multi-stage generator, multistage occurs
The combination of device is the entrance connection of flue gas and first-stage generator, the exhanst gas outlet of first-stage generator and entering for second-stage generator
Mouth connection, and so on, the exhanst gas outlet of last final stage generator is connect with the smoke inlet of condenser 2, completes flow of flue gas.
The condenser 2 of this system can be single-stage condenser and be also possible to multi-stage condensing device, and the combination of multi-stage condensing device is flue gas
It is connect with the entrance of first-stage condenser, the exhanst gas outlet of first-stage condenser is connected with the entrance of secondary condenser, and so on, most
The smoke inlet of the exhanst gas outlet with absorber 3 of last condenser stage is connect afterwards, completes flow of flue gas.The absorber 3 of this system can
To be that single absorber stage is also possible to multistage absorption device, the combination of multistage absorption device is the entrance of flue gas and first absorber
Connection, the exhanst gas outlet of first absorber are connected with the entrance of secondary absorber, and so on, the flue gas of last final stage absorber
Outlet is connect with atmosphere.Solution-the water heat exchanger 4 of this system can be single-stage solution-water heat exchanger and be also possible to multistage
Solution-water heat exchanger, multi-stage solution-water heat exchanger workflow is: concentrated solution from first-stage generator bottom flow out into
Enter primary liquor-water heat exchanger, after heat exchange outflow, spray heat exchange concentration is carried out into second-stage generator, from second-stage generator
Bottom outflow enters second level solution-water heat exchanger under the driving of solution spraying pump 6 and exchanges heat, and so on, final stage hair
After the concentrate solution of raw device outflow enters final stage solution-water heat exchanger heat exchange outflow, into the sprinkling equipment of absorber 3,
Complete solution flowing.
Embodiment 3: as shown in Fig. 2, the flue gas heat recovery system that a kind of combustion gas generates includes sequentially connecting through flue
Generator 1, condenser 2, the absorber 3 connect, the absorber 3 is also connected with solution-water heat exchanger 4 by the road, described molten
Liquid-water heat exchanger 4 is also connect with generator 1 by the road, and the taphole of the absorber 3 is dilute with generator 1 by the road
Solution spraying mechanism import connection.Specifically, waste heat flue is connect with the gas inlet of generator 1, the flue gas of generator 1
Outlet is connect through flue with the gas inlet of condenser 2, gas inlet of the exhanst gas outlet of condenser 2 through flue Yu absorber 3
Connection, to form flue gas heat exchange access.Meanwhile the concentrated solution outlet of generator 1 is dense with solution-water heat exchanger 4 by the road
The concentrated solution outlet of solution inlet port connection, solution-water heat exchanger 4 is connect with the solution inlet port of absorber 3 by the road, absorber
3 taphole is connect with the weak solution spraying mechanism import of generator 1 by the road, forms the circulation loop of solution.Combustion gas produces
Raw flue gas heat recovery system further includes water-water heat exchanger 5, hot water return pipe A, hot water feeding pipe B, the condensation
The condensate outlet of device 2 is connect with the condensate import of water-water heat exchanger 5 by the road, and the condensate of water-water heat exchanger 5 is exported through pipe
Road is connect with the condensate spraying mechanism import in condenser 2；The hot water return pipe A hot water inlet with water-water heat exchanger 5 by the road
Connection, the hot water outlet of water-water heat exchanger 5 are connect with hot water feeding pipe B by the road；Hot water return pipe A by the road with solution-water
The hot water inlet of heat exchanger 4 connects, and the hot water outlet of solution-water- to-water heat exchanger 4 is connect with hot water feeding pipe B by the road.This system
It is in parallel that middle hot water return pipe A with the connection type of water-water heat exchanger 5, solution-water heat exchanger 4 is also possible to two-way.Hot water
Return pipe A is connect with the import of solution heat exchanger 4, water-water heat exchanger 5, hot water feeding pipe B and solution heat exchanger 4,
The outlet of water-water heat exchanger 5 connects, and constitutes hot water heating pipeline.Condensate outlet and the water-hydrothermal exchange of the condenser 2
Condensate spray pump 8 is also equipped on connecting line between the condensate import of device 5.Specifically, the condensate outlet of condenser 2 passes through
Condensate spray pump 8 is connect with the condensate import of water-water heat exchanger 5, in the condensate outlet of water-water heat exchanger 5 and condenser 2
Condensate spraying mechanism import connection, to form condensed water heat exchange cycle circuit.
The flue gas heat recovery system that combustion gas generates, the generator 1, condenser 2, flue gas and spray in absorber 3
The liquid form of leaching liquid is flue gas adverse current and goes up, the catadromous vertical reverse flow of spray liquid or flue gas and spray liquid water
Perhaps flue gas and the horizontal co-flow of spray liquid or flue gas and spray liquid are reverse vertically for flat reverse flow, vertical co-flow
Perhaps flue gas and spray liquid eddy flow in the same direction or flue gas and spray liquid cross-mixing one of flow or a variety of eddy flow.This is
In system, to guarantee heat exchange sufficiently in generator 1, condenser 2 and absorber 3, the liquid form of flue gas and spray liquid can be inverse
Stream, cocurrent flow, mixed flow, eddy flow it is one or more, it is not limited to vertical this kind of form of reverse flow, and in a device
A variety of types of flow can also be inside used simultaneously, and liquid form of the same race, which can be used, in different device can also use different flowing shapes
Formula.The quantity of the generator 1 is one group or concatenated multiple groups；The quantity of the condenser 2 is for one group or concatenated more
Group；The quantity of the absorber 3 be the quantity of one group of perhaps concatenated multiple groups solution-water heat exchanger 4 be one group or
Concatenated multiple groups.Specifically, the generator 1 of this system, which can be single-stage generator, is also possible to multi-stage generator, multistage occurs
The combination of device is the entrance connection of flue gas and first-stage generator, the exhanst gas outlet of first-stage generator and entering for second-stage generator
Mouth connection, and so on, the exhanst gas outlet of last final stage generator is connect with the smoke inlet of condenser 2, completes flow of flue gas.
The condenser 2 of this system can be single-stage condenser and be also possible to multi-stage condensing device, and the combination of multi-stage condensing device is flue gas
It is connect with the entrance of first-stage condenser, the exhanst gas outlet of first-stage condenser is connected with the entrance of secondary condenser, and so on, most
The smoke inlet of the exhanst gas outlet with absorber 3 of last condenser stage is connect afterwards, completes flow of flue gas.The absorber 3 of this system can
To be that single absorber stage is also possible to multistage absorption device, the combination of multistage absorption device is the entrance of flue gas and first absorber
Connection, the exhanst gas outlet of first absorber are connected with the entrance of secondary absorber, and so on, the flue gas of last final stage absorber
Outlet is connect with atmosphere.Solution-the water heat exchanger 4 of this system can be single-stage solution-water heat exchanger and be also possible to multistage
Solution-water heat exchanger, multi-stage solution-water heat exchanger workflow is: concentrated solution from first-stage generator bottom flow out into
Enter primary liquor-water heat exchanger, after heat exchange outflow, spray heat exchange concentration is carried out into second-stage generator, from second-stage generator
Bottom outflow enters second level solution-water heat exchanger under the driving of solution spraying pump 6 and exchanges heat, and so on, final stage hair
After the concentrate solution of raw device outflow enters final stage solution-water heat exchanger heat exchange outflow, into the sprinkling equipment of absorber 3,
Complete solution flowing.
Embodiment 4: as shown in Figure 1, a kind of method for the flue gas heat recovery system that combustion gas generates, use are above-mentioned
The flue gas heat recovery system that combustion gas generates, workflow are as follows:
S1, the high-temperature flue gas y1 that the water capacity in waste heat flue is 80g/kg-150g/kg enter generator 1, are sending out
The flowing of flue gas from below to up in raw device 1, weak solution are sprayed down by weak solution spraying mechanism, keep flue gas direct with weak solution
Contact heat-exchanging, weak solution evaporate vapor under the heating of high-temperature flue gas y1, spray and lower weak solution concentration is for temperature
50 DEG C -80 DEG C of pyrosol r1 is flowed out from the bottom of generator 1, is entered solution-hydro-thermal under the driving of solution spraying pump 6 and is handed over
After parallel operation 4 exchanges heat, formation temperature is that 35 DEG C -60 DEG C of middle cryogenic fluid r2 is flowed into absorber 3, and high-temperature flue gas y1 is mixed into steaming
Shampoo steam becomes the high-humidity flue gas y2 that water capacity is 95g/kg-1200g/kg；
S2, high-humidity flue gas y2 are flowed into condenser 2 from discharge at the top of generator 1, in high-humidity flue gas y2 and condenser 2
Spray and lower condensed water n1 direct contact heat transfer become water capacity as 210g/kg- after high-humidity flue gas y2 heat release cooling and dehumidification
Part Water vapor condensation is that liquid water is mixed with condensed water n1 in the middle humidity flue gas y3 of 400g/kg, high-humidity flue gas y2, is condensed
Water n1 is gathered in the bottom of condenser 2 after the completion of heat exchange, and a part of condensed water n1 enters under the driving of condensate spray pump 8
Heat absorption heating in condenser 2 is continued back at after 5 heat release of water-water heat exchanger cooling, is looped back and forth like this, the condensation of remainder
Water n1 is recycled；
S3, middle humidity flue gas y3 subsequently enter absorber 3, and the solution tank of absorber 3 is collected solution-water heat exchanger 4 and changed
Middle cryogenic fluid r2 after heat, middle humidity flue gas y3 enter from the bottom of solution tank, sufficiently exchange heat dehumidification with middle cryogenic fluid r2
Afterwards, but with sprayed in absorber 3 and under concentrated solution carry out heat exchange dehumidification formation temperature be 30 DEG C -45 DEG C, water capacity 10g/
The low humidity flue gas y4 discharge system of kg-80g/kg；
S4, middle cryogenic fluid r2 in middle humidity flue gas y3 condense after liquid water mix become temperature be 35 DEG C -45 DEG C
Cryogenic fluid r3, cryogenic fluid r3 under the action of solution circulation pump 7 into generator 1 weak solution spraying mechanism in, it is complete
At the whole cyclic process of solution；
S5, the hot water of hot water return pipe A enter the heat absorption heating of water-water heat exchanger 5, then enter back into solution-hydrothermal exchange
The heat absorption heating of device 4, is then confessed by hot water feeding pipe B as hot water.
Further, the pyrosol r1, middle cryogenic fluid r2, cryogenic fluid r3 are lithium bromide water solution or chlorination
Calcium aqueous solution.Using the salts solution for being easily melted into water, the corrosion to flue, pipeline etc. can be avoided as far as possible, improves its use
Service life guarantees the stable operation of system.
Embodiment 5: as shown in Fig. 2, a kind of method for the flue gas heat recovery system that combustion gas generates, use are above-mentioned
The flue gas heat recovery system that combustion gas generates, workflow are as follows:
S1, the high-temperature flue gas y1 that the water capacity in waste heat flue is 80g/kg-150g/kg enter generator 1, are sending out
The flowing of flue gas from below to up in raw device 1, weak solution are sprayed down by weak solution spraying mechanism, keep flue gas direct with weak solution
Contact heat-exchanging, weak solution evaporate vapor under the heating of high-temperature flue gas y1, spray and lower weak solution concentration is for temperature
50 DEG C -80 DEG C of pyrosol r1 is flowed out from the bottom of generator 1, is entered solution-hydro-thermal under the driving of solution spraying pump 6 and is handed over
After parallel operation 4 exchanges heat, formation temperature is that 35 DEG C -60 DEG C of middle cryogenic fluid r2 is flowed into absorber 3, and high-temperature flue gas y1 is mixed into steaming
Shampoo steam becomes the high-humidity flue gas y2 that water capacity is 95g/kg-1200g/kg；
S2, high-humidity flue gas y2 are flowed into condenser 2 from discharge at the top of generator 1, in high-humidity flue gas y2 and condenser 2
Spray and lower condensed water n1 direct contact heat transfer become into water capacity as 210g/ after high-humidity flue gas y2 heat release cooling and dehumidification
Part Water vapor condensation is that liquid water is mixed with condensed water n1 in the middle humidity flue gas y3 of kg-400g/kg, high-humidity flue gas y2,
Condensed water n1 is gathered in the bottom of condenser 2 after the completion of heat exchange, a part of condensed water n1 under the driving of condensate spray pump 8,
Heating of absorbing heat in condenser 2 is continued back at after into 5 heat release of water-water heat exchanger cooling, is looped back and forth like this, remainder
Condensed water n1 is recycled；
S3, middle humidity flue gas y3 subsequently enter absorber 3, and the solution tank of absorber 3 is collected solution-water heat exchanger 4 and changed
Middle cryogenic fluid r2 after heat, middle humidity flue gas y3 enter from the bottom of solution tank, sufficiently exchange heat dehumidification with middle cryogenic fluid r2
Afterwards, but with sprayed in absorber 3 and under concentrated solution carry out heat exchange dehumidification formation temperature be 30 DEG C -45 DEG C, water capacity 10g/
The low humidity flue gas y4 discharge system of kg-80g/kg；
S4, middle cryogenic fluid r2 in middle humidity flue gas y3 condense after liquid water mix become temperature be 35 DEG C -45 DEG C
Cryogenic fluid r3, cryogenic fluid r3 under the action of solution circulation pump 7 into generator 1 weak solution spraying mechanism in, it is complete
At the whole cyclic process of solution；
S5, the hot water of hot water return pipe A enter the heat absorption heating of water-water heat exchanger 5, then pass through hot water feeding pipe B conduct
Hot water is confessed；The hot water of hot water return pipe A enters the heat absorption heating of solution-water heat exchanger 4 simultaneously, is then supplied by hot water
Water pipe B is confessed as hot water.
Further, the pyrosol r1, middle cryogenic fluid r2, cryogenic fluid r3 are lithium bromide water solution or chlorination
Calcium aqueous solution.Using the salts solution for being easily melted into water, the corrosion to flue, pipeline etc. can be avoided as far as possible, improves its use
Service life guarantees the stable operation of system.
Claims (10)
1. the flue gas heat recovery system that a kind of combustion gas generates, which is characterized in that including through the sequentially connected generation of flue
Device (1), condenser (2), absorber (3), the absorber (3) is also connected with solution-water heat exchanger (4) by the road, described
Solution-water heat exchanger (4) is also connect with generator (1) by the road, the taphole of the absorber (3) by the road with generation
The weak solution spraying mechanism import of device (1) connects.
2. the flue gas heat recovery system that combustion gas according to claim 1 generates, which is characterized in that further include solution
Spray pump (6) and solution circulation pump (7) are pacified on the connecting line between the absorber (3) and solution-water heat exchanger (4)
(6) are pumped equipped with solution spraying, solution circulation pump is installed on the connecting line between the generator (1) and absorber (3)
(7)。
3. the flue gas heat recovery system that combustion gas according to claim 1 generates, which is characterized in that further include water-
Water heat exchanger (5), hot water return pipe (A), hot water feeding pipe (B), the condenser (2) condensate outlet by the road with water-
The condensate import of water- to-water heat exchanger (5) connects, the condensate outlet of water-water heat exchanger (5) by the road with the condensate in condenser (2)
Spraying mechanism import connection；Hot water return pipe (A) is connect with the hot water inlet of water-water heat exchanger (5) by the road, water-water heat exchange
The hot water outlet of device (5) is connect with the import of solution-water- to-water heat exchanger (4) by the road, the hot water outlet of solution-water- to-water heat exchanger (4)
It is connect by the road with hot water feeding pipe (B).
4. the flue gas heat recovery system that combustion gas according to claim 1 generates, which is characterized in that further include water-
Water heat exchanger (5), hot water return pipe (A), hot water feeding pipe (B), the condenser (2) condensate outlet by the road with water-
The condensate import of water- to-water heat exchanger (5) connects, the condensate outlet of water-water heat exchanger (5) by the road with the condensate in condenser (2)
Spraying mechanism import connection；Hot water return pipe (A) is connect with the hot water inlet of water-water heat exchanger (5) by the road, water-water heat exchange
The hot water outlet of device (5) is connect with hot water feeding pipe (B) by the road；Hot water return pipe (A) by the road with solution-water- to-water heat exchanger
(4) hot water inlet connection, the hot water outlet of solution-water- to-water heat exchanger (4) are connect with hot water feeding pipe (B) by the road.
5. the flue gas heat recovery system that combustion gas according to claim 3 or 4 generates, which is characterized in that described cold
The condensate of condenser (2), which is exported, is also equipped with condensate spray on the connecting line between the condensate import of water-water heat exchanger (5)
It pumps (8).
6. the flue gas heat recovery system that combustion gas according to claim 5 generates, which is characterized in that the generator
(1), the liquid form of condenser (2), the interior flue gas of absorber (3) and spray liquid is gone up for flue gas adverse current, spray liquid goes downstream
Vertical reverse flow perhaps flue gas and the horizontal reverse flow of spray liquid, vertical co-flow or flue gas and spray liquid level
Co-flow perhaps flue gas and spray liquid reverse eddy flow perhaps flue gas and spray liquid eddy flow in the same direction or flue gas and spray vertically
One of liquid cross-mixing flowing is a variety of.
7. the flue gas heat recovery system that combustion gas according to claim 6 generates, which is characterized in that the generator
(1) quantity is one group or concatenated multiple groups；The quantity of the condenser (2) is one group or concatenated multiple groups；The suction
It is one group or series connection that the quantity for receiving device (3), which is the quantity of one group of perhaps concatenated multiple groups solution-water heat exchanger (4),
Multiple groups.
8. a kind of method for the flue gas heat recovery system that combustion gas generates is produced using any combustion gas of claim 1-7
Raw flue gas heat recovery system, which is characterized in that workflow are as follows:
S1, the high-temperature flue gas (y1) that the water capacity in waste heat flue is 80g/kg-150g/kg enter generator (1), are sending out
The flowing of flue gas from below to up in raw device (1), solution are sprayed down by weak solution spraying mechanism, connect flue gas directly with solution
Touching heat exchange, solution evaporate vapor under the heating of high-temperature flue gas (y1), spray and lower solution be concentrated be temperature be 50 DEG C-
80 DEG C of pyrosol (r1) is flowed out from the bottom of generator (1), enters solution-hydro-thermal under the driving of solution spraying pump (6)
After exchanger (4) heat exchange, formation temperature is flowed into absorber (3) for 35 DEG C -60 DEG C of middle cryogenic fluid (r2), and high-temperature flue gas
(y1) being mixed into evaporation vapor becomes the high-humidity flue gas (y2) that water capacity is 95g/kg-1200g/kg；
S2, high-humidity flue gas (y2) discharge at the top of generator (1) flow into condenser (2), high-humidity flue gas (y2) and condensation
Spray in device (2) and lower condensed water (n1) direct contact heat transfer become to contain after high-humidity flue gas (y2) heat release cooling and dehumidification wet
Amount is the middle humidity flue gas (y3) of 210g/kg-400g/kg, in high-humidity flue gas (y2) part Water vapor condensation be liquid water with
Condensed water (n1) mixing, condensed water (n1) are gathered in the bottom of condenser (2) after the completion of heat exchange, and a part of condensed water (n1) exists
Under the driving of condensate spray pump (8), heat absorption in condenser (2) is continued back at after cooling down into water-water heat exchanger (5) heat release and is risen
Temperature loops back and forth like this, and the condensed water (n1) of remainder is recycled；
S3, middle humidity flue gas (y3) subsequently enter absorber (3), and the solution tank of absorber (3) collects solution-water heat exchanger
(4) the middle cryogenic fluid (r2) after exchanging heat, middle humidity flue gas (y3) enter from the bottom of solution tank, fill with middle cryogenic fluid (r2)
After point heat exchange dehumidification, but with spray in absorber (3) and lower solution to carry out heat exchange dehumidification formation temperature be 30 DEG C -45 DEG C, contain
Moisture is low humidity flue gas (y4) discharge system of 10g/kg-80g/kg；
S4, the liquid water in middle cryogenic fluid (r2) and middle humidity flue gas (y3) after condensation mixs that become temperature be 35 DEG C -45 DEG C
Cryogenic fluid (r3), cryogenic fluid (r3) under the action of solution circulation pump (7) enter generator (1) weak solution spray thrower
In structure, the whole cyclic process of solution is completed；
S5, the hot water of hot water return pipe (A) enter water-water heat exchanger (5) heat absorption heating, then enter back into solution-hydrothermal exchange
Device (4) heat absorption heating, is then confessed by hot water feeding pipe (B) as hot water.
9. the method for the flue gas heat recovery system that combustion gas according to claim 8 generates, which is characterized in that work
Process can be with are as follows:
S1, the high-temperature flue gas (y1) that the water capacity in waste heat flue is 80g/kg-150g/kg enter generator (1), are sending out
The flowing of flue gas from below to up in raw device (1), solution are sprayed down by weak solution spraying mechanism, connect flue gas directly with solution
Touching heat exchange, solution evaporate vapor under the heating of high-temperature flue gas (y1), spray and lower solution be concentrated be temperature be 50 DEG C-
80 DEG C of pyrosol (r1) is flowed out from the bottom of generator (1), enters solution-hydro-thermal under the driving of solution spraying pump (6)
After exchanger (4) heat exchange, formation temperature is flowed into absorber (3) for 35 DEG C -60 DEG C of middle cryogenic fluid (r2), and high-temperature flue gas
(y1) being mixed into evaporation vapor becomes the high-humidity flue gas (y2) that water capacity is 95g/kg-1200g/kg；
S2, high-humidity flue gas (y2) discharge at the top of generator (1) flow into condenser (2), high-humidity flue gas (y2) and condensation
Spray in device (2) and lower condensed water (n1) direct contact heat transfer become to contain after high-humidity flue gas (y2) heat release cooling and dehumidification wet
Amount is the middle humidity flue gas (y3) of 210g/kg-400g/kg, in high-humidity flue gas (y2) part Water vapor condensation be liquid water with
Condensed water (n1) mixing, condensed water (n1) are gathered in the bottom of condenser (2) after the completion of heat exchange, and a part of condensed water (n1) exists
Under the driving of condensate spray pump (8), heat absorption in condenser (2) is continued back at after cooling down into water-water heat exchanger (5) heat release and is risen
Temperature loops back and forth like this, and the condensed water (n1) of remainder is recycled；
S3, middle humidity flue gas (y3) subsequently enter absorber (3), and the solution tank of absorber (3) collects solution-water heat exchanger
(4) the middle cryogenic fluid (r2) after exchanging heat, middle humidity flue gas (y3) enter from the bottom of solution tank, fill with middle cryogenic fluid (r2)
After point heat exchange dehumidification, but with spray in absorber (3) and lower solution to carry out heat exchange dehumidification formation temperature be 30 DEG C -45 DEG C, contain
Moisture is low humidity flue gas (y4) discharge system of 10g/kg-80g/kg；
S4, the liquid water in middle cryogenic fluid (r2) and middle humidity flue gas (y3) after condensation mixs that become temperature be 35 DEG C -45 DEG C
Cryogenic fluid (r3), cryogenic fluid (r3) under the action of solution circulation pump (7) enter generator (1) weak solution spray thrower
In structure, the whole cyclic process of solution is completed；
S5, the hot water of hot water return pipe (A) enter water-water heat exchanger (5) heat absorption heating, are then made by hot water feeding pipe (B)
It is confessed for hot water；The hot water of hot water return pipe (A) enters solution-water heat exchanger (4) heat absorption heating simultaneously, then passes through
Hot water feeding pipe (B) confesses as hot water.
10. the method for the flue gas heat recovery system that combustion gas according to claim 8 or claim 9 generates, which is characterized in that
The pyrosol (r1), middle cryogenic fluid (r2), cryogenic fluid (r3) are lithium bromide water solution or calcium chloride water.
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| CN101922799A (en) * | 2010-07-26 | 2010-12-22 | 清华大学 | Flue gas waste heat recovery system based on solution absorption cycle |
| CN102242946A (en) * | 2011-04-29 | 2011-11-16 | 清华大学 | Concentrated heat supply system for reclaiming smoke afterheat by absorption heat pump |
| CN104180523A (en) * | 2014-08-19 | 2014-12-03 | 清华大学 | Flue gas waste heat recovery unit |
| CN107448965A (en) * | 2017-07-14 | 2017-12-08 | 兰州理工大学 | A kind of Novel incineration furnace fume afterheat depth recovery and energy level lifting process system |
| CN108119907A (en) * | 2017-12-22 | 2018-06-05 | 芜湖德司节能科技有限公司 | A kind of gas fired-boiler afterheat energy-saving recovery method |
| CN209026805U (en) * | 2018-08-20 | 2019-06-25 | 中国华电科工集团有限公司 | A kind of flue gas heat recovery system that combustion gas generates |
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| CN115488015A (en) * | 2022-08-01 | 2022-12-20 | 上海先导慧能技术有限公司 | Baking oven |
| CN115488015B (en) * | 2022-08-01 | 2023-11-28 | 上海先导慧能技术有限公司 | Baking oven |
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