CN108443906A - Smoke waste heat utilization system and method based on multiple level with recycling heating cold wind - Google Patents
Smoke waste heat utilization system and method based on multiple level with recycling heating cold wind Download PDFInfo
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- CN108443906A CN108443906A CN201810432640.8A CN201810432640A CN108443906A CN 108443906 A CN108443906 A CN 108443906A CN 201810432640 A CN201810432640 A CN 201810432640A CN 108443906 A CN108443906 A CN 108443906A
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- 238000004064 recycling Methods 0.000 title claims abstract description 32
- 238000010438 heat treatment Methods 0.000 title claims abstract description 24
- 239000002918 waste heat Substances 0.000 title claims abstract description 21
- 239000000779 smoke Substances 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 title claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 101
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000003546 flue gas Substances 0.000 claims abstract description 17
- 230000003009 desulfurizing effect Effects 0.000 claims abstract description 6
- 238000011084 recovery Methods 0.000 claims description 12
- 239000007789 gas Substances 0.000 claims description 10
- 239000003517 fume Substances 0.000 claims description 9
- 230000000694 effects Effects 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000009833 condensation Methods 0.000 description 4
- 230000005494 condensation Effects 0.000 description 4
- 239000003245 coal Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000010792 warming Methods 0.000 description 3
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000005864 Sulphur Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000006392 deoxygenation reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
Classifications
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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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
- F22B1/1807—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines using the exhaust gases of combustion engines
-
- 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
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/003—Feed-water heater systems
-
- 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
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L15/00—Heating of air supplied for combustion
- F23L15/04—Arrangements of recuperators
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Air Supply (AREA)
Abstract
The invention discloses smoke waste heat utilization systems and method based on multiple level with recycling heating cold wind, including：Sequentially connected air preheater, deduster, air-introduced machine and desulfurizing tower；It connects respectively I grade low-temps economizer and II grade low-temp economizers before deduster and after air-introduced machine；The bypass flue in parallel on the flue collector being connect with the air preheater is sequentially connected in series bypass level-one high temperature heater (HTH), bypass two level low-temperature heater on the bypass flue；Condensed water returns to host condensate system after boosting water pump, II grade low-temps economizer, I grade low-temps economizer and bypass two level low-temperature heater successively quoted from host condensate system, constitutes residual heat of condensed water recycling cycle main road.Advantageous effect of the present invention：Residual heat of condensed water recycles main road series connection three-level flue gas heat-exchange unit, while using recycling bypass heating cold wind, and whole system only needs that a set of condensate circulating pump is arranged, and simplied system structure saves production and maintenance cost.
Description
Technical field
The invention belongs to power plant's machine stove depth coupling fume afterheats to utilize technical field, more particularly to a kind of to be based on multiple level
With the smoke waste heat utilization system and method for recycling heating cold wind.
Background technology
Heat loss due to exhaust gas is maximum one in boiler various heat losses typically about 5%~12%, accounts for boiler heat loss
60%~70%.The principal element for influencing heat loss due to exhaust gas is exhaust gas temperature, and under normal circumstances, exhaust gas temperature often increases by 10
DEG C, heat loss due to exhaust gas increases by 0.6%~1.0%.In actual operation, the exhaust gas temperature in many thermal power plants is above
Design value is more.So reducing exhaust gas temperature, make full use of smoke discharging residual heat for saving fuel, reducing pollution with important
Practical significance.
Smoke waste heat utilization system is exactly to reduce power plant stack gas discharge heat loss, realize that one kind that fume afterheat utilizes has
Effect means, cardinal principle are the heat conversions by all means by flue gas cold wind, condensed water or water supply, to
The final operating temperature for improving condensed water or water supply, " squeezes " part steam turbine high and low pressure steam extraction in turn.Steam turbine may make to do in this way
Function power increases, and in the case where contributing constant, saves boiler fired coal consumption, reduces unit heat consumption.
Setting two-stage low temperature saves coal after fume afterheat Utilization plan more advanced at present is before deduster and air-introduced machine
Steam air heater is arranged in air preheater air side entrance in device, and the boiler exhaust gas waste heat recycled using two-stage low temperature economizer, heating is entered
The cold wind of air preheater.But find in practical applications, existing system has the disadvantage that：
(1) the two-stage low temperature economizer before deduster and after air-introduced machine, water side uses closed cycle, to ensure that enclosed is followed
Expansion tank need to be arranged in the thermal expansion of ring water.Circulating water temperature is up to 142 DEG C, and the setting height of expansion tank will reach 50m
More than, it can ensure under so high water temperature, recirculated water will not vaporize.Expansion tank setting difficulty is big, During Process of Long-term Operation
Middle closed-up water water quality is difficult to ensure；Closed-up water does not pass through deoxygenation, and water cycle corrodes equipment and pipeline oxidization.
(2) flue gas heat of two-stage low temperature economizer recycling is more than needed for first and second cold air heating, and waste heat need to pass through
Water set in addition-water condensation water heater introduces the condensed water (30.7 DEG C) of more low-lying level to recycle waste heat.Water-water
The presence of heat exchanger end difference causes the energy level of steam turbine therrmodynamic system recycling heat to reduce.
(3) system complex, bypass two level economizer, condensation water heater are all made of condensed water, but the position introduced is not
Together, different recirculated water booster pumps need to be set；Closed-loop water system is also required to setting booster pump.
Invention content
The purpose of the present invention is exactly to be provided a kind of based on multiple level and recycling heating cold wind to solve above-mentioned problem
Smoke waste heat utilization system and method, the system condensed water main road connect three-level flue gas heat-exchange unit, using bypass heating it is cold
Wind；Whole system only needs that a set of condensate circulating pump is arranged, and it is not necessary that expansion tank is arranged, water quality can also be via main steam turbine
Condensed water precision processing system ensured.
To achieve the above object, concrete scheme of the invention is as follows：
A kind of utilized with the fume afterheat for recycling heating cold wind based on multiple level is disclosed when the first object of the present invention is
System, including：Sequentially connected air preheater, deduster, air-introduced machine and desulfurizing tower；Before deduster and after air-introduced machine respectively
Series connection I grade low-temps economizer and II grade low-temp economizers；The bypass cigarette in parallel on the flue collector being connect with the air preheater
Road is sequentially connected in series bypass level-one high temperature heater (HTH), bypass two level low-temperature heater on the bypass flue；
Condensed water is drawn from host condensate system, is saved successively by boosting water pump, II grade low-temps economizer, I grade low-temps
Host condensate system is returned after coal device and bypass two level low-temperature heater, constitutes residual heat of condensed water recycling cycle main road.
Further, First air steam air heater and Secondary Air warm wind are separately connected in the air preheater air side access location
Device；Condensed water is drawn from I grade low-temp economizers, is returned after respectively enteing First air steam air heater and the progress heat exchange of Secondary Air steam air heater
Rise water pump entrance；Constitute condensed water recirculation circuit.
Further, the heat recovery medium of the bypass level-one high temperature heater (HTH) is from host high-pressure feed water system
Branch, and return to host high-pressure feed water system.
Further, the residual heat of condensed water recycling cycle main road is in parallel with the low-pressure heater of host condensate system.
The second object of the present invention be a kind of boiler is disclosed, including：Above-mentioned any multiple level that is based on adds with recycling
The smoke waste heat utilization system of hot cold wind.
The third object of the present invention is to disclose a kind of fume afterheat utilization side based on multiple level with recycling heating cold wind
Method, including：
Condensed water is as flue gas low-temperature section heat recovery medium, quoted from host condensate system, successively by boosting water pump,
Host condensate system is returned after II grade low-temps economizer, I grade low-temps economizer and bypass two level low-temperature heater, constitutes condensation
Water waste heat recovery recycles main road.
Further, a portion condensed water that I grade low-temps economizer is drawn passes through First air steam air heater and two respectively
Condensed water cycle main road is reentered after secondary wind steam air heater, is constituted condensed water recirculation circuit, is heated First air and Secondary Air.
Further, the heat recovery medium of bypass level-one high temperature heater (HTH) is the branch from host high-pressure feed water system
Road, and return to host high-pressure feed water system.
Further, high-temperature flue gas is divided into two-way, enters I grade low-temp economizers after air preheater all the way, another
Road enters I grade low-temp economizers after bypass level-one high temperature heater (HTH), bypass two level low-temperature heater successively；It is low into I grades
The flue gas of warm economizer enters desulfurizing tower after deduster, air-introduced machine, II grade low-temp economizers successively.
Beneficial effects of the present invention：
Condensed water main road series connection three-level flue gas heat-exchange unit, while using bypass heating cold wind, whole system only needs setting one
Condensate circulating pump is covered, simplied system structure saves production and maintenance cost.
Residual heat of condensed water recycling cycle main road is that open cycle eliminates installation swelling water it is not necessary that expansion tank is arranged
The complex operations of case；And it is in parallel with main steam turbine condensate system, water quality can be via the condensate polishing treatment system of main steam turbine
System is ensured.
Residual heat of condensed water recycling cycle main road and condensed water recirculation circuit is respectively set, without introducing the solidifying of more low-lying level
(30.7 DEG C) are born water to recycle waste heat；The minimum water temperature of condensed water is promoted to 50 DEG C by 30.7 DEG C, improves entire waste heat profit
With the energy level of system.
By calculating ratio pair, present system compared with prior art, by taking certain engineering as an example, can further decrease steam turbine heat
4kJ/kWh is consumed, 94kJ/kWh is reached.Not only system is simplified, and water quality is guaranteed, and the energy level of UTILIZATION OF VESIDUAL HEAT IN carries
It rises, further promotes generatine set heat efficiency.
Description of the drawings
Fig. 1 is that the present invention is based on the smoke waste heat utilization system structural schematic diagrams of multiple level and recycling heating cold wind.
Specific implementation mode：
The present invention is described in detail below in conjunction with the accompanying drawings：
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the application.Unless another
It indicates, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific implementation mode, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singulative
It is also intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or combination thereof.
In order to solve the problems, such as to be pointed out in background technology, it is cold based on multiple level and recycling heating that the invention discloses one kind
The smoke waste heat utilization system of wind, as shown in Figure 1, including：Sequentially connected air preheater, deduster, air-introduced machine and de-
Sulphur tower；It connects respectively I grade low-temps economizer and II grade low-temp economizers before deduster and after air-introduced machine；With air preheater
Bypass flue in parallel on the flue collector of connection is sequentially connected in series bypass level-one high temperature heater (HTH), bypass two level on bypass flue
Low-temperature heater；It is separately connected First air steam air heater and Secondary Air steam air heater in air preheater air side access location.
High-temperature flue gas is divided into two-way, enters I grade low-temp economizers after air preheater all the way, and another way is passed through successively
Enter I grade low-temp economizers after bypassing level-one high temperature heater (HTH), bypass two level low-temperature heater；Into I grade low-temp economizers
Flue gas enters desulfurizing tower after deduster, air-introduced machine, II grade low-temp economizers successively.Flue-gas temperature adds in bypass level-one high temperature
Successively decrease successively when hot device, bypass two level low-temperature heater, I grade low-temps economizer and II grade low-temp economizers.
Condensed water is as flue gas low-temperature section heat recovery medium, quoted from host condensate system, successively by boosting water pump,
Host condensate system is returned after II grade low-temps economizer, I grade low-temps economizer and bypass two level low-temperature heater, constitutes condensation
Water waste heat recovery recycles main road, residual heat of condensed water recycling cycle main road with host condensate system what low-pressure heater simultaneously
Connection；The additional recycling bypass of residual heat of condensed water recycling cycle main road, by being drawn after I grade low-temp economizers, heating first and second
Boosting pump entrance is returned after wind.The heat recovery medium for bypassing level-one high temperature heater (HTH) is from host high-pressure feed water system
Branch, and return to host high-pressure feed water system.
The present invention, which utilizes, utilizes bypass two level low-temperature heater, I grade low-temps economizer, II grade low-temp economizer import smoke temperatures
The characteristics of declining in gradient draws condensed water series connection all the way and passes through three low-temperature heaters, recovered flue gas heat；The condensate circuit
Cycle main road is recycled as residual heat of condensed water.
The condensed water that condensate pump comes out is warming up to 50 DEG C after gland heater heats, then by boosting water pump liter
After pressure, initially entering II grade low-temp economizers and carry out heat exchange, the condensed water come out through II grade low-temp economizers is warming up to 70 DEG C,
Subsequently into I grade low-temp economizers carry out heat exchange, through I grade low-temp economizers come out condensed water be warming up to 142 DEG C, then its
A middle part enters bypass two level low-temperature heater and carries out heat exchange, heats up through bypassing the condensed water that two level low-temperature heater comes out
To 170 DEG C, before being then back to host condensate system oxygen-eliminating device.
It is open cycle since residual heat of condensed water recycles cycle main road, it is not necessary that expansion tank is arranged, it is swollen eliminates installation
The complex operations of swollen water tank；And it is in parallel with main steam turbine condensate system, water quality can be via the condensate fine of main steam turbine at
Reason system is ensured, water is avoided to recycle the oxidation corrosion to equipment and pipeline.
On the other hand, the present invention recycles in residual heat of condensed water and draws condensed water recirculation circuit all the way on cycle main road, by I
It is drawn after grade low-temp economizer, boosting pump entrance is returned to after heating primary and secondary air, to heat primary and secondary air.From I grade low-temps
The condensed water part that economizer comes out is sent to First air steam air heater and Secondary Air steam air heater and carries out heat exchange, from First air warm wind
The condensing water temperature that device and Secondary Air steam air heater come out is dropped back to 50 DEG C, and residual heat of condensed water is again introduced into after the water pump that boosts and is returned
Cycle main road is received to be recycled.
Primary and secondary air is heated by condensed water cycle, it, will without the condensed water (30.7 DEG C) of more low-lying level is separately provided
The minimum water temperature of condensed water is promoted to 50 DEG C by 30.7 DEG C, improves the energy level of entire afterheat utilizing system.
It should be noted that the actual temp being related among the above is all exemplary, do not constitute to the technology of the present invention
The limitation of content；During running, temperature may be different.
As an implementation, the heat recovery medium of bypass level-one high temperature heater (HTH) is from host high-pressure feed water system
The branch of system, and return to host high-pressure feed water system.Heat exchange is carried out using bypass level-one high temperature heater (HTH) to return to heat water supply
Road further increases the utilization rate of flue gas.
By practical calculating ratio to analysis, present system compared with prior art, by taking certain engineering as an example, can further decrease
Turbine heat rate 4kJ/kWh.Not only system is simplified, and water quality is guaranteed, and the energy level of UTILIZATION OF VESIDUAL HEAT IN is promoted, into one
Step promotes generatine set heat efficiency.
Above-mentioned, although the foregoing specific embodiments of the present invention is described with reference to the accompanying drawings, not protects model to the present invention
The limitation enclosed, those skilled in the art should understand that, based on the technical solutions of the present invention, those skilled in the art are not
Need to make the creative labor the various modifications or changes that can be made still within protection scope of the present invention.
Claims (9)
1. the smoke waste heat utilization system based on multiple level with recycling heating cold wind, including：Sequentially connected air preheater,
Deduster, air-introduced machine and desulfurizing tower；It is characterized in that, I grade low-temp economizers of connecting respectively before deduster and after air-introduced machine
With II grade low-temp economizers；The bypass flue in parallel on the flue collector being connect with the air preheater, on the bypass flue
It is sequentially connected in series bypass level-one high temperature heater (HTH), bypass two level low-temperature heater；
Condensed water is drawn from host condensate system, successively by boosting water pump, II grade low-temps economizer, I grade low-temp economizers
Host condensate system is returned with after bypass two level low-temperature heater, constitutes residual heat of condensed water recycling cycle main road.
2. the smoke waste heat utilization system based on multiple level with recycling heating cold wind as described in claim 1, in the sky
Pre- device air side access location is separately connected First air steam air heater and Secondary Air steam air heater；It is characterized in that, condensed water is low from I grades
Warm economizer is drawn, and respectively enters First air steam air heater and Secondary Air steam air heater carries out return boosting pump entrance after heat exchange；
Constitute condensed water recirculation circuit.
3. the smoke waste heat utilization system based on multiple level with recycling heating cold wind, feature exist as described in claim 1
In the heat recovery medium of the bypass level-one high temperature heater (HTH) is the branch from host high-pressure feed water system, and returns to master
Machine high-pressure feed water system.
4. the smoke waste heat utilization system based on multiple level with recycling heating cold wind, feature exist as described in claim 1
In the residual heat of condensed water recycling cycle main road is in parallel with the low-pressure heater of host condensate system.
5. a kind of boiler, which is characterized in that including：Claim 1-4 any one of them is based on multiple level and is heated with recycling
The smoke waste heat utilization system of cold wind.
6. utilizing method based on multiple level and the fume afterheat of recycling heating cold wind, which is characterized in that including：
Condensed water is as flue gas low-temperature section heat recovery medium, quoted from host condensate system, successively by boosting water pump, II grades
Host condensate system is returned after low-level (stack-gas) economizer, I grade low-temps economizer and bypass two level low-temperature heater, is constituted more than condensed water
Heat recovery cycle main road.
7. multiple level as claimed in claim 6 and the fume afterheat of recycling heating cold wind utilize method, which is characterized in that I
Grade low-temp economizer draw a portion condensed water respectively after First air steam air heater and Secondary Air steam air heater again into
Enter condensed water cycle main road, constitutes condensed water recirculation circuit, heat First air and Secondary Air.
8. multiple level as claimed in claim 6 and the fume afterheat of recycling heating cold wind utilize method, which is characterized in that other
The heat recovery medium of road level-one high temperature heater (HTH) is the branch from host high-pressure feed water system, and returns to host high-pressure feed water
System.
9. multiple level as claimed in claim 6 and the fume afterheat of recycling heating cold wind utilize method, which is characterized in that high
Warm flue gas is divided into two-way, enters I grade low-temp economizers after air preheater all the way, and another way is high by bypass level-one successively
Enter I grade low-temp economizers after warm heater, bypass two level low-temperature heater；Flue gas into I grade low-temp economizers passes through successively
Enter desulfurizing tower after crossing deduster, air-introduced machine, II grade low-temp economizers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810432640.8A CN108443906B (en) | 2018-05-08 | 2018-05-08 | Flue gas waste heat utilization system and method based on multi-energy level and recirculated heating cold air |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810432640.8A CN108443906B (en) | 2018-05-08 | 2018-05-08 | Flue gas waste heat utilization system and method based on multi-energy level and recirculated heating cold air |
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| Publication Number | Publication Date |
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| CN108443906A true CN108443906A (en) | 2018-08-24 |
| CN108443906B CN108443906B (en) | 2024-03-15 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110207144A (en) * | 2019-05-27 | 2019-09-06 | 东方电气集团东方锅炉股份有限公司 | Air preheat and smoke waste heat utilization system and control method based on level-density parameter |
| CN110553246A (en) * | 2019-09-30 | 2019-12-10 | 大唐郓城发电有限公司 | Boiler flue gas waste heat utilization system and utilization method thereof |
| CN111678116A (en) * | 2020-05-25 | 2020-09-18 | 大唐东北电力试验研究院有限公司 | Gradient utilization method for flue gas of 1000MW double reheating power plant |
| CN111678117A (en) * | 2020-05-25 | 2020-09-18 | 大唐东北电力试验研究院有限公司 | Exhaust smoke waste heat recovery system of 1000MW secondary reheating power plant |
| CN113513745A (en) * | 2021-06-02 | 2021-10-19 | 华北电力科学研究院有限责任公司 | Low-temperature economizer system with low-temperature corrosion self-blocking function and operation method |
| CN114110638A (en) * | 2021-11-26 | 2022-03-01 | 西安热工研究院有限公司 | Automatic regulating system and method for efficient flue gas waste heat utilization of air preheater bypass |
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| CN110207144A (en) * | 2019-05-27 | 2019-09-06 | 东方电气集团东方锅炉股份有限公司 | Air preheat and smoke waste heat utilization system and control method based on level-density parameter |
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| CN111678116A (en) * | 2020-05-25 | 2020-09-18 | 大唐东北电力试验研究院有限公司 | Gradient utilization method for flue gas of 1000MW double reheating power plant |
| CN111678117A (en) * | 2020-05-25 | 2020-09-18 | 大唐东北电力试验研究院有限公司 | Exhaust smoke waste heat recovery system of 1000MW secondary reheating power plant |
| CN113513745A (en) * | 2021-06-02 | 2021-10-19 | 华北电力科学研究院有限责任公司 | Low-temperature economizer system with low-temperature corrosion self-blocking function and operation method |
| CN114110638A (en) * | 2021-11-26 | 2022-03-01 | 西安热工研究院有限公司 | Automatic regulating system and method for efficient flue gas waste heat utilization of air preheater bypass |
| CN114110638B (en) * | 2021-11-26 | 2024-01-19 | 西安热工研究院有限公司 | Automatic regulating system and method for efficient flue gas waste heat utilization of bypass of air preheater |
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