SE463783B - Method and arrangement for utilizing flue gas heat - Google Patents
Method and arrangement for utilizing flue gas heatInfo
- Publication number
- SE463783B SE463783B SE8600230A SE8600230A SE463783B SE 463783 B SE463783 B SE 463783B SE 8600230 A SE8600230 A SE 8600230A SE 8600230 A SE8600230 A SE 8600230A SE 463783 B SE463783 B SE 463783B
- Authority
- SE
- Sweden
- Prior art keywords
- combustion air
- water
- flue gas
- heat
- temperature
- Prior art date
Links
Classifications
-
- 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
- F23J15/04—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material using washing fluids
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L15/00—Heating of air supplied for combustion
- F23L15/04—Arrangements of recuperators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- 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
- F23L7/00—Supplying non-combustible liquids or gases, other than air, to the fire, e.g. oxygen, steam
- F23L7/002—Supplying water
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H8/00—Fluid heaters characterised by means for extracting latent heat from flue gases by means of condensation
- F24H8/003—Fluid heaters characterised by means for extracting latent heat from flue gases by means of condensation having means for moistening the combustion air with condensate from the combustion gases
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2225/00—Measuring
- F23N2225/08—Measuring temperature
- F23N2225/14—Ambient temperature around burners
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2237/00—Controlling
- F23N2237/22—Controlling water injection
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2241/00—Applications
- F23N2241/04—Heating water
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- 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
Landscapes
- 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)
- Chimneys And Flues (AREA)
- Air Supply (AREA)
Abstract
Description
463 S785 2 steg med avpassad mängd tvättvätska för varje steg. Därvid värmeväxlas tvättvätskan från det varmare steget mot vatten i ett förbrukningsnät. Tvättvätskan från det kallare steget kyls i ett reaktionstorn genom värme- och vätskeupptagning i luften till förbränningen. Därigenom kan systemet regle- ras väl. 463 S785 2 steps with a suitable amount of washing liquid for each step. In this case, the washing liquid is exchanged for heat from the warmer stage towards water in a consumption network. The washing liquid from the colder stage is cooled in a reaction tower by heat and liquid uptake into the air for combustion. As a result, the system can be regulated well.
För att man skall kunna sänka förbränningstemperaturen erfordras en barlast som inte är syre och inte är bränsle.In order to be able to lower the combustion temperature, a ballast that is not oxygen and is not fuel is required.
I detta system användes huvudsakligen vattenånga, vilken också är gynnsam vid förbränningen genom vattengasreak- tionen. För att man skall kunna tillvarataga rökgasvärmen till låg temperatur erfordras en mottagare med låg tempe- ratur och i detta system erhålles den låga temperaturen genom vattenupptagning i förbränningsluften. Härigenom kan värme med lägre temperatur än förbrukningsnätet till- varatagas och överföras till nätet utan användning av värme- pump.In this system, mainly water vapor is used, which is also favorable for the combustion by the water gas reaction. In order to be able to recover the flue gas heat to a low temperature, a low-temperature receiver is required and in this system the low temperature is obtained by absorbing water into the combustion air. In this way, heat with a lower temperature than the consumption network can be utilized and transferred to the network without the use of a heat pump.
För att man effektivt skall kunna rena en gas med tvättvätska krävs en god kontakt mellan gas och vätska samt låg temperatur om föroreningarna skall kondenseras ut (exempelvis kvicksilver). I ett sådant system erhålles ett långt tvättsteg och en låg temperatur utan nämndvärd extra energitillsats.In order to be able to effectively purify a gas with washing liquid, a good contact between gas and liquid and a low temperature are required if the contaminants are to be condensed out (eg mercury). In such a system, a long washing step and a low temperature are obtained without appreciable extra energy addition.
Vid det visade utföringsexemplet bringas luften till förbränningen att passera ett reaktionstorn 1 med tvätt- vätska (huvudsakligen vatten) där det ingående vattnets temperatur och flöde kan regleras för att därigenom få önskad fukthalt och därmed också önskad förbränningstem- peratur.In the embodiment shown, the air is caused to the combustion to pass a reaction tower 1 with washing liquid (mainly water) where the temperature and flow of the constituent water can be regulated in order to thereby obtain the desired moisture content and thus also the desired combustion temperature.
Rökgasen från förbränningen bringas - efter kylning i pannan - också att passera ett reaktionstorn 2 med tvätt- vätska/vatten. Reaktionstornet är uppdelat i flera delar och tvättvätskeflödet regleras efter värmebalansen i de olika delarna så att en god temperaturverkningsgrad er- hålles vid uppvärmningen av vätskan. Tvättvätskan i den kallaste delen kommer från lufttornet 1. Kylningen av tvätt- vätskan sker sedan i en värmeväxlare 3 i ett värmesystem g, 463 7853 3 till en reglerad temperatur, varefter vätskan förs till lufttornet och ett nytt varv genom systemet. I det visade systemet ingår också en värmeavtappning från cirka mitten av lufttornet 4 till motsvarande plats med samma temperatur i rökgastornet. I det visade diagrammet förändras luften från punkten F till E-D-C och därefter via förbränningen och kylningen i pannan, som rökgas, till A samt därefter i rökgastornet till B-C-D och E. Exemplet visar ett rela- tivt torrt biobränsle med i stort endast vattentillskott på grund av bränslets väte. Punkten D markerar vattenavtapp- ning från lufttornet respektive införselplatsen i rökgas- tornet. Systemet ger vattenöverskott genom kondenseringen av rökgasens vatteninnehåll. Mängd och karaktär beror av bränslet. Genom uppfinningen uppnås därmed att rökgasvärmen tillgodogöres på ett effektivt och ekonomiskt sätt, rök- gasen tvättas och fuktmängden i förbränningsluften regle- ras och kan utnyttjas för styrning av förbränningstempera- turen. Därigenom uppnås en ekonomisk eldning med lâg mil- jöbelastning.The flue gas from the combustion is - after cooling in the boiler - also brought to a reaction tower 2 with washing liquid / water. The reaction tower is divided into several parts and the flow of washing liquid is regulated according to the heat balance in the different parts so that a good temperature efficiency is obtained when the liquid is heated. The washing liquid in the coldest part comes from the air tower 1. The cooling liquid is then cooled in a heat exchanger 3 in a heating system g, 463 7853 3 to a regulated temperature, after which the liquid is passed to the air tower and a new revolution through the system. The system shown also includes a heat tap from approximately the center of the air tower 4 to the corresponding location with the same temperature in the flue gas tower. In the diagram shown, the air changes from point F to EDC and then via the combustion and cooling in the boiler, as flue gas, to A and then in the flue gas tower to BCD and E. The example shows a relatively dry biofuel with largely only water addition due to hydrogen of the fuel. Point D marks the drainage of water from the air tower and the point of entry into the flue gas tower. The system provides excess water by condensing the water content of the flue gas. Amount and character depend on the fuel. The invention thus achieves that the flue gas heat is utilized in an efficient and economical manner, the flue gas is washed and the amount of moisture in the combustion air is regulated and can be used for controlling the combustion temperature. In this way, an economic fire with a low environmental impact is achieved.
Claims (13)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE8600230A SE463783B (en) | 1986-01-20 | 1986-01-20 | Method and arrangement for utilizing flue gas heat |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE8600230A SE463783B (en) | 1986-01-20 | 1986-01-20 | Method and arrangement for utilizing flue gas heat |
Publications (3)
Publication Number | Publication Date |
---|---|
SE8600230D0 SE8600230D0 (en) | 1986-01-20 |
SE8600230L SE8600230L (en) | 1987-07-18 |
SE463783B true SE463783B (en) | 1991-01-21 |
Family
ID=20363150
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE8600230A SE463783B (en) | 1986-01-20 | 1986-01-20 | Method and arrangement for utilizing flue gas heat |
Country Status (1)
Country | Link |
---|---|
SE (1) | SE463783B (en) |
-
1986
- 1986-01-20 SE SE8600230A patent/SE463783B/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
SE8600230D0 (en) | 1986-01-20 |
SE8600230L (en) | 1987-07-18 |
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