CN108729965A - The electricity generation system and CO of the part oxygen-enriched combusting of Combined with Calcium base chain2Capture method - Google Patents
The electricity generation system and CO of the part oxygen-enriched combusting of Combined with Calcium base chain2Capture method Download PDFInfo
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- CN108729965A CN108729965A CN201810586670.4A CN201810586670A CN108729965A CN 108729965 A CN108729965 A CN 108729965A CN 201810586670 A CN201810586670 A CN 201810586670A CN 108729965 A CN108729965 A CN 108729965A
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- China
- Prior art keywords
- coal
- flue gas
- oxygen
- calcium base
- burning
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 85
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 84
- 239000001301 oxygen Substances 0.000 title claims abstract description 84
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 title claims abstract description 41
- 239000011575 calcium Substances 0.000 title claims abstract description 39
- 229910052791 calcium Inorganic materials 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 31
- 230000005611 electricity Effects 0.000 title claims abstract description 27
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 69
- 239000003546 flue gas Substances 0.000 claims abstract description 69
- 239000007789 gas Substances 0.000 claims abstract description 29
- 238000002485 combustion reaction Methods 0.000 claims abstract description 25
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 15
- 239000000126 substance Substances 0.000 claims abstract description 14
- 239000002671 adjuvant Substances 0.000 claims abstract description 5
- 239000008246 gaseous mixture Substances 0.000 claims abstract description 5
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 40
- 239000003245 coal Substances 0.000 claims description 35
- 238000006243 chemical reaction Methods 0.000 claims description 32
- 238000001354 calcination Methods 0.000 claims description 26
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 17
- 238000001816 cooling Methods 0.000 claims description 12
- 238000010248 power generation Methods 0.000 claims description 10
- 239000002817 coal dust Substances 0.000 claims description 9
- 239000001569 carbon dioxide Substances 0.000 claims description 8
- 239000000779 smoke Substances 0.000 claims description 8
- 230000006835 compression Effects 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 6
- 238000005262 decarbonization Methods 0.000 claims description 4
- 238000006477 desulfuration reaction Methods 0.000 claims description 4
- 238000000746 purification Methods 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- VTYYLEPIZMXCLO-UHFFFAOYSA-L calcium carbonate Substances [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 3
- 238000005336 cracking Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 2
- 238000004064 recycling Methods 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims 1
- 239000003570 air Substances 0.000 abstract description 43
- 238000005516 engineering process Methods 0.000 abstract description 16
- 238000005265 energy consumption Methods 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 6
- 230000009257 reactivity Effects 0.000 abstract description 2
- 241000196324 Embryophyta Species 0.000 description 13
- 239000000446 fuel Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 3
- 239000005864 Sulphur Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 235000013312 flour Nutrition 0.000 description 2
- 239000003517 fume Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000010025 steaming Methods 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- 241000183024 Populus tremula Species 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000002802 bituminous coal Substances 0.000 description 1
- 235000014171 carbonated beverage Nutrition 0.000 description 1
- 230000035568 catharsis Effects 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
- F01K7/16—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being only of turbine type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/508—Sulfur oxides by treating the gases with solids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/62—Carbon oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/81—Solid phase processes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
- F01K11/02—Plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B31/00—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus
-
- 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
- F23J15/022—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/40—Alkaline earth metal or magnesium compounds
- B01D2251/404—Alkaline earth metal or magnesium compounds of calcium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/30—Sulfur compounds
- B01D2257/302—Sulfur oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/50—Carbon oxides
- B01D2257/504—Carbon dioxide
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L2900/00—Special arrangements for supplying or treating air or oxidant for combustion; Injecting inert gas, water or steam into the combustion chamber
- F23L2900/15043—Preheating combustion air by heat recovery means located in the chimney, e.g. for home heating devices
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
-
- 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
- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
- Y02C20/40—Capture or disposal of greenhouse gases of CO2
-
- 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
- Y02E20/32—Direct CO2 mitigation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Abstract
The invention discloses a kind of electricity generation systems and CO of the part oxygen-enriched combusting of Combined with Calcium base chain2Capture method, the part oxygen enriching method using the gaseous mixture of air, oxygen and flue gas recycled as combustion adjuvant make boiler export flue gas CO2Gas concentration is improved to 30%~60%, this flue gas enters capture device after the burning chemistry chains based on calcium base, and calcium base reactivity greatly improves, CO2Capturing efficiency reaches 95% or more, and improves gross generation.The present invention has taken into account oxygen cost, carbon carrier cost, energy consumption and CO processed2The advantages that overall efficiency of capturing efficiency is best, and part oxygen-enriched combusting and the advanced carbon capture technology of two kinds of calcium base chemical chain are combined, economical good, simple for process, and low energy consumption, carbon capture is efficient.
Description
Technical field
The present invention relates to coal-fired power generator sets and power industry CO2Capture field, more particularly to a kind of Combined with Calcium base chemistry
The coal generating system and CO of the part oxygen-enriched combusting of chain2Capture method.
Background technology
Since industrial civilization, the CO in earth atmosphere2Concentration is steeply risen due to the production activity of the mankind.China
Populous, the level of economic development is relatively low, is in industrialization, the important stage that urbanization is accelerated development, CO2Control
It is faced with immense pressure and particular difficulty.Power generation is the CO of a concentration2Emission source controls and slows down CO in power generation2
Discharge is for solving the problems, such as that greenhouse effects are of great significance.According to the tune of the inter-governmental climate change committee (IPCC) of the United Nations
It looks into, it, can be by global CO during carbon capture is applied to fuel energy utilization with Plugging Technology Applied (CCS) technology2Discharge capacity is reduced
20%~40%, active influence will be generated to mitigation of climate change.
The CO of power industry2Trapping is captured after mainly having the preceding capture of burning, burning and oxygen-enriched combusting captures 3 kinds of technology roads
Line.Wherein oxygen-enriched combustion technology is otherwise known as oxy-fuel combustion technology (Oxy-Fuel Combustion), refers to boiler tail row
The recycled system of part of smoke of cigarette is sent to stokehold, the high-concentration oxygen (O produced with air-separating plant2Content exists
95% or more) it after being mixed in a certain ratio, carries fuel and burns through burner feeding burner hearth, and complete diabatic process.It is rich
The attraction of oxygen burning is that exhaust gas volumn is small, CO2Concentration promoted, do not need solvent, convenient for large-scale, at low cost compress it is cold
But CO is recycled2；System equipment size is relatively small, has good connection in mainstream technology with existing power plant, is suitable for existing
There are transformation and new-built unit, is easy to be received by power industry.
But since oxygen-enriched combusting needs a large amount of pure oxygen for fuel combustion, the air separator energy of industrial applications at present
It consumes excessively high so that full factory efficiency reduces by 8~10% or so, considerably increases cost of electricity-generating, seriously constrains the development of the technology.
In addition, oxygen-enriched combusting can cause boiler in-furnace temperature higher, both needs to increase powerful recirculation blower newly, be passed through a large amount of cycles
Flue gas is to maintain ignition temperature, furnace body to also need to use heat-resisting material.Part oxygen-enriched combusting is using mixing air, oxygen and follows
The mode of ring flue gas reduces furnace temperature, reduces required amount of oxygen and amount of circulating gas, to reduce air separator and
The energy consumption of circulating fan also reduces the requirement to furnace body and burner materials, advantageously reduces boiler and burner cost.But
It is that part oxygen-enriched combusting makes boiler export flue gas CO2Concentration declines, and reduces CO2Catch rate.
Burning chemistry chains based on calcium base have CO2The characteristics of separation, separately as catching mode after burning, carbon carrier with
CO2A concentration of 10~15% or so smoke reaction activity is slightly poor, CO2Catch rate is not high, but it is real convenient for being coupled with other systems
Existing CO2Efficiently capture.
Invention content
The shortcomings that it is a primary object of the present invention to overcome the prior art and deficiency, provide a kind of part of Combined with Calcium base chain
The electricity generation system of oxygen-enriched combusting effectively reduces oxygen demand and oxygen energy consumption processed, in reality while realizing part Rich Oxygen Combustion
CO is captured after burning now based on calcium base chemical chain2While, enhance carbon carrier reactivity, improves CO2Capturing efficiency and power generation
Amount.
Another object of the present invention is to provide a kind of CO based on above-mentioned electricity generation system2Capture method.
The purpose of the present invention is realized by the following technical solution：A kind of power generation of the part oxygen-enriched combusting of Combined with Calcium base chain
System, including：The oxygen-enriched coal-burning boiler in flue gas recirculation part, main steam electricity generation system capture after the burning chemistry chains based on calcium base
Device, CO2Cooling compression set and air separator；
Air separator is connect with capture device after coal-burning boiler and burning chemistry chains respectively, and the flue gas of coal-burning boiler is wherein
All the way enter burning chemistry chains after capture device, then after burning chemistry chains capture device continue and CO2Cooling compression set connects
It connects；Coal-burning boiler is connect with main steam electricity generation system simultaneously.
Preferably, part oxygen-enriched combusting is carried out in coal-burning boiler, generated heat pushes master by main steam/water circulating
Steam turbine (6) does work, main generator (17) power generation.
Preferably, fire coal boiler fume outlet is sequentially connected air preheater (2) and deduster (3), and deduster is followed through master
Ring wind turbine (5) and air preheater (2) is connected back to, the flue gas of coal-burning boiler (1) outlet passes through air preheater (2) and deduster
(3), the flue gas first via of coal-burning boiler (1) outlet enters air preheater (2), and and preheated air through major cycle wind turbine (5)
Enter coal-burning boiler after the oxygen mix produced with air separator.
Further, deduster (3) continues to connect SAPMAC method wind turbine (7), and the second tunnel of flue gas of coal-burning boiler (1) outlet is made
For the coal-fired conveying power of coal bunker, carries coal dust through SAPMAC method wind turbine (7) and be sent into coal-burning boiler (1) burner hearth.
Further, deduster (3) continues connect compressor (8), heat exchanger (9) and air-introduced machine (10), coal-burning boiler (1)
The flue gas third road of outlet by compressor (8), heat exchanger (9) and air-introduced machine (10) enter burning chemistry chains after capture device.
Preferably, deduster (3) outlet is connected with desulphurization plant (4), and desulphurization plant (4) connects SAPMAC method wind turbine (7), combustion
Coal-fired conveying power of the second tunnel of flue gas of coal burning boiler (1) outlet as coal bunker, after flowing through desulphurization plant (4), through SAPMAC method wind
Machine (7) carries coal dust and is sent into coal-burning boiler (1) burner hearth.
Further, desulphurization plant (4) continues connect compressor (8), heat exchanger (9) and air-introduced machine (10), coal-burning boiler
(1) export flue gas by desulphurization plant (4) purify after third road by compressor (8), heat exchanger (9) and air-introduced machine (10) into
Enter capture device after burning chemistry chains.
Preferably, capture device includes sequentially connected calcination reactor (12), carbon carrier circulating picture-changing after burning chemistry chains
Hot equipment (13) and absorbing reaction device (11), the oxygen that air separator (19) is produced wherein are sent into calcination reactor (12) all the way
It is CaCO with coal combustion3Calcining provides heat, and the flue gas of coal-burning boiler wherein enters absorbing reaction device (11) all the way, and flue gas exists
Absorbing reaction device (11) imurity-removal includes CO2And SO2；The CaCO of generation3Entered by carbon carrier cycle heat exchange equipment (13) and is forged
Reactor (12) is burnt to crack and regenerate.
Preferably, capture device connection time steam generating system after burning chemistry chains, secondary steam generating system includes carbonated drink
System, secondary steam turbine (14) and time generator (18), absorbing reaction device (11) outlet connection gas cooler (20), calcination reaction
Device (12) connects carbon dioxide cooler (15), the height of the purifying smoke and calcination reactor (12) of absorbing reaction device (11) outlet
Pure CO2Gas temperature is high, and entrained heat is recovered profit by gas cooler (20) and carbon dioxide cooler (15) respectively
With to increase time steam generating system generated energy.
Preferably, absorbing reaction device (11) outlet by the high temperature purification flue gas of decarbonization, desulfuration, successively pass through flue gas it is cold
But it after device (20) and heat exchanger (9) cool down, is discharged.
Preferably, deduster (3) is also connect with ash bucket (21).
Preferably, air separator (19) produces the oxygen of 90% or more purity using Deep Cooling Method.
A kind of electricity generation system CO of the part oxygen-enriched combusting of Combined with Calcium base chain2Capture method, with air, oxygen and recycling
Part oxygen enriching method of the gaseous mixture of flue gas as combustion adjuvant, makes boiler export flue gas CO2Gas concentration improves to 30%~
60%, this flue gas enters capture device after the burning chemistry chains based on calcium base, then carries out deep removal CO2。
Compared with prior art, the present invention having the following advantages that and advantageous effect：
(1) part oxygen-enriched combustion technology is integrated with based on calcium chain chemical chain burning technology, with individual oxygen-enriched combusting skill
Art is compared, and required amount of oxygen and amount of circulating gas can be reduced, to reduce the energy consumption of air separator and circulating fan,
The requirement to furnace body and burner materials is also reduced, advantageously reduces boiler and burner cost, and increase generated energy.
(2) part oxygen-enriched combustion technology is integrated with based on calcium chain chemical chain burning technology, with individual burning chemistry chains
Capturing technology is compared afterwards, the CO in flue gas after the oxygen-enriched circulating combustion in part2Concentration is promoted, Ca-base adsorbent and CO2Reactivity
It improves, effectively controls CO in boiler exhaust gas2Concentration is further enriched to 95% or more.
Coal-fired conveying power of (3) the second road circulating flue gas as coal bunker, carries coal dust through SAPMAC method wind turbine and is sent into fire coal
Boiler furnace has saved the energy consumption of coal dust conveying, has been also beneficial to the steady combustion of boiler.
Description of the drawings
Fig. 1 is embodiment system structure diagram.
In Fig. 1：1- boilers；2- air preheaters；3- dedusters；4- desulphurization plants；5- major cycle wind turbines；The main steamers of 6-
Machine；7- SAPMAC method wind turbines；8- compressors；9- heat exchangers；10- air-introduced machines；11- absorbing reaction devices；12- calcination reactors；13- is carried
Carbon body circulation heat transmission equipment；14- steam turbine；15- carbon dioxide coolers, 16- carbon-dioxide gas compressors；17- main generators；
18- generator；19- air separators；20- gas coolers, 21- ash buckets.
Specific implementation mode
Present invention will now be described in further detail with reference to the embodiments and the accompanying drawings, but embodiments of the present invention are unlimited
In this.
Embodiment 1
A kind of coal generating system and CO of the part oxygen-enriched combusting of Combined with Calcium base chemical chain2Capture method, with air, oxygen
Part oxygen enriching method of the gaseous mixture of gas and flue gas recycled as combustion adjuvant, makes boiler export flue gas CO2Gas concentration improves
To 30%~60%, this flue gas enters capture device after the burning chemistry chains based on calcium base, then carries out deep removal CO2。
The coal generating system of the part oxygen-enriched combusting of Combined with Calcium base chemical chain includes mainly the oxygen-enriched combustion in flue gas recirculation part
Coal burning boiler, flue gas ash removal and desulfurizer, main steam electricity generation system, capture device after the burning chemistry chains based on calcium base, secondary steaming
Vapour electricity generation system, CO2Cooling compression set and air separator.
Boiler export flue gas CO2Gas concentration ratio can carry out by adjusting the ratio of air, oxygen and flue gas recycled
Optimal control, carries out part oxygen-enriched combusting in coal-burning boiler (1), and generated heat can push master by main steam/water circulating
Steam turbine (6) does work, main generator (17) power generation.
Air separator (19) produces the oxygen of 90% or more purity using Deep Cooling Method, and high-concentration oxygen is divided into two-way, and one
Road oxygen is sent into coal-burning boiler (1) for coal combustion with preheated air and part after the circulating flue gas of dust separation mixes；It is another
Road oxygen is sent into calcination reactor (12) and coal combustion, is CaCO3Calcining provides heat.
The flue gas of coal-burning boiler (1) outlet passes through air preheater (2) and deduster (3), and partial fume is through major cycle wind
Machine (5) enter air preheater (2), and with after preheated air and oxygen mix enter burner hearth；Second road circulating flue gas is as coal
The coal-fired conveying power in storehouse after flowing through desulphurization plant (4), carries coal dust through SAPMAC method wind turbine (7) and is sent into burner hearth, conventional air combustion
Under the conditions of burning, oxygen content is relatively high in air, and coal pulverizer explodes in order to prevent, and powder feeding temperature highest is no more than 120
℃；Explosion danger will not occur because oxygen content is very low in flue gas using circulating flue gas powder feeding under the conditions of oxygen-enriched combusting, enter
The smoke temperature of flour mill can be at 200 DEG C or so；Remaining purified flue gas is followed by compressor (8), heat exchanger (9) and air-introduced machine
(10), the absorbing reaction device (11) for the system that captures is entered after burning chemistry chains with higher temperature.
After burning chemistry chains based on calcium base capture device mainly include absorbing reaction device (11), calcination reactor (12) and
Carbon carrier cycle heat exchange equipment (13), wherein flue gas remove CO in absorbing reaction device (11)2And SO2Equal impurity, reaction temperature are
650℃；The CaCO of generation3Enter calcination reactor (12) cracking by carbon carrier cycle heat exchange equipment (13) and regenerates, calcining
Temperature is about 1000 DEG C.
CaCO in the calcination reactor (12)3Decomposition is highly endothermic process, and heat is by coal and comes from air separator
(19) pure oxygen reaction provides, and absorbing reaction device (11) is strong exothermal reaction, the waste heat of generation by boiler circuit with
Secondary steam turbine (14) is for generating electricity.
In said program, absorbing reaction device (11) outlet by the high temperature purification flue gas of decarbonization, desulfuration, successively through overload
After gas cooler (20) and heat exchanger (9) cooling, it is discharged.
Since chemical chain is high-temperature pressure process, the purifying smoke and calcination reactor (12) of absorbing reaction device (11) outlet
High-purity CO2Gas temperature is higher, and entrained heat can pass through gas cooler (20) and carbon dioxide cooler (15) respectively
It is recycled, to increase time steam turbine (14) amount of work and time generator (18) generated energy.
In said program, cleaner includes deduster (3) and ash bucket (21), deduster (3) entrance and air preheater
(2) it is connected, outlet is connected with desulphurization plant (4).Since part oxidizing combustible can reduce SO2Sulfides, subsequent calcium base
Chain catching mode is learned to sulfide also certain catharsis, if because fuel used is low-sulfur coal, based on wet desulphurization method
Desulphurization plant (4) can be omitted, and deduster (3) outlet is directly connected with compressor (8).If power plant it is fuel used for sulphur coal,
Medium sulphur coal, to ensure to meet the requirement of China's most tight discharge standard newest to power plant's gas pollutant, desulphurization plant (4) still needs to
Retain.
Embodiment 2
As shown in Figure 1, Fig. 1 is the schematic diagram of the coal generating system of the part oxygen-enriched combusting of Combined with Calcium base chemical chain.Such as
Shown in Fig. 1, using the gaseous mixture of air, oxygen and flue gas recycled as combustion adjuvant, the mass flow of wherein oxygen is for it
96.4kg/s, amount of circulating gas 616kg/s, flue gas recirculation ratio are 72%, and the mass flow of preheated air is 100.2kg/
S makes boiler export flue gas CO2Gas concentration is improved to 45%, this flue gas captures dress after entering the burning chemistry chains based on calcium base
It sets, carries out deep removal, CO2Capturing efficiency improve to 97.6%.
The coal generating system of the part oxygen-enriched combusting of Combined with Calcium base chemical chain includes mainly the oxygen-enriched combustion in flue gas recirculation part
Coal burning boiler, flue gas ash removal and desulfurizer, main steam electricity generation system, capture device after the burning chemistry chains based on calcium base, secondary steaming
Vapour electricity generation system, CO2Cooling compression set and air separator.
Part oxygen-enriched combusting is carried out in coal-burning boiler (1), the heat of generation can push main steamer by main steam/water circulating
Machine (6) does work, main generator (17) power generation, net electric generation 502.3MW.
Air separator (19) uses Deep Cooling Method to produce purity as 95% oxygen, and high-concentration oxygen is divided into two-way, all the way
Oxygen is sent into coal-burning boiler (1) for coal combustion with preheated air and part after the circulating flue gas of dust separation mixes；Another way
Oxygen is sent into calcination reactor (12) and coal combustion, is CaCO3Calcining provides heat.The mass flow of two-way oxygen is respectively
96.35kg/s and 61.0kg/s.
The flue gas of coal-burning boiler (1) outlet passes through air preheater (2) and deduster (3), and first via circulating flue gas is through master
Circulating fan (5) enter air preheater (2), and with after preheated air and oxygen mix enter burner hearth；Second road circulating flue gas
As the coal-fired conveying power of coal bunker, after flowing through desulphurization plant (4), carries coal dust through SAPMAC method wind turbine (7) and be sent into burner hearth, cycle
The quality total flow of flue gas is 616kg/s, and the ratio of the first via and the second road circulating flue gas is 8:2, coal dust amount is 42kg/s, is passed
It unites under the conditions of air burning, oxygen content is relatively high in air, and coal pulverizer explodes in order to prevent, and powder feeding temperature highest cannot
More than 120 DEG C；Circulating flue gas powder feeding is used under the conditions of oxygen-enriched combusting, because oxygen content is very low in flue gas, explosion danger will not occur
Danger, the smoke temperature into flour mill can be at 200 DEG C or so；And remaining flue gas followed by compressor (8), heat exchanger (9) and draws
Wind turbine (10), the absorbing reaction device (11) for entering after burning chemistry chains the system that captures with 170 DEG C, the mass flow of remaining flue gas are
240kg/s。
After burning chemistry chains based on calcium base capture device mainly include absorbing reaction device (11), calcination reactor (12) and
Carbon carrier cycle heat exchange equipment (13), wherein flue gas remove CO in absorbing reaction device (11)2And SO2Equal impurity, reaction temperature are
650℃；The CaCO of generation3Enter calcination reactor (12) cracking by carbon carrier cycle heat exchange equipment (13) and regenerates, calcining
Temperature is about 1000 DEG C.
CaCO in the calcination reactor (12)3Decomposition is highly endothermic process, and heat is by coal and comes from air separator
(19) pure oxygen reaction provides, and the amount of oxygen and coal dust amount of entrance are 61.3kg/s and 23.4kg/s respectively.And absorbing reaction device
(11) it is strong exothermal reaction, the waste heat of generation is by boiler circuit and time steam turbine (14) for generating electricity.
The absorbing reaction device (11) outlet by the high temperature purification flue gas of decarbonization, desulfuration, successively through overloading flue gas cooling
After device (20) and heat exchanger (9) cooling, it is discharged.
Since chemical chain is high-temperature pressure process, the purifying smoke and calcination reactor (12) of absorbing reaction device (11) outlet
High-purity CO2Gas temperature is higher, and entrained heat can pass through gas cooler (20) and carbon dioxide cooler (15) respectively
It is recycled, to increase time steam turbine (14) amount of work and time generator (18) generated energy, the net power generation of secondary generator (18)
Amount is 126.5MW.
The cleaner includes deduster (3) and ash bucket (21), and deduster (3) entrance is connected with air preheater (2),
Outlet is connected with desulphurization plant (4).The present embodiment, power plant are fuel used for sulphur bituminous coal, component and calorific value such as 1 institute of table in typical case
Show, to ensure to meet the requirement of China's most tight discharge standard newest to power plant's gas pollutant, desulphurization plant (4) still needs to protect
It stays.
The characteristic of 1 coal of table
For thoroughly evaluating system performance, simulated using Aspen Plus.It burns with regular air overcritical
Coal unit compares (thermal efficiency falls to 38.5%, and gross generation rises to 478.6MW), finds Combined with Calcium base chemical chain
The thermal efficiency of the coal generating system of part oxygen-enriched combusting falls to 29.8%, but gross generation rises to 622.2MW.Combined with Calcium
The coal generating system and CO of the part oxygen-enriched combusting of base chemical chain2Capture method, CO2Capturing efficiency be 97.6%, hence it is evident that it is high
In the CO of oxygen-enriched combustion technology about 90%2The CO of capturing efficiency and calcium base burning chemistry chains capturing technology about 80~85%2It captures
Efficiency.
The above embodiment is a preferred embodiment of the present invention, but embodiments of the present invention are not by above-described embodiment
Limitation, it is other it is any without departing from the spirit and principles of the present invention made by changes, modifications, substitutions, combinations, simplifications,
Equivalent substitute mode is should be, is included within the scope of the present invention.
Claims (10)
1. the electricity generation system of the part oxygen-enriched combusting of Combined with Calcium base chain, which is characterized in that including：The oxygen-enriched fire coal in flue gas recirculation part
Boiler, main steam electricity generation system, capture device after the burning chemistry chains based on calcium base, CO2Cooling compression set and air separation
Device；
Air separator is connect with capture device after coal-burning boiler and burning chemistry chains respectively, and the flue gas of coal-burning boiler is wherein all the way
Capture device after into burning chemistry chains, then after burning chemistry chains capture device continue and CO2Cooling compression set connection；Together
When coal-burning boiler connect with main steam electricity generation system.
2. the electricity generation system of the part oxygen-enriched combusting of Combined with Calcium base chain according to claim 1, which is characterized in that in fire coal
Part oxygen-enriched combusting is carried out in boiler, generated heat pushes main steam turbine (6) to do work, main power generation by main steam/water circulating
Machine (17) generates electricity.
3. the electricity generation system of the part oxygen-enriched combusting of Combined with Calcium base chain according to claim 1, which is characterized in that coal-fired pot
Kiln gas outlet is sequentially connected air preheater (2) and deduster (3), and deduster is through major cycle wind turbine (5) and connects back to air
The flue gas of preheater (2), coal-burning boiler (1) outlet passes through air preheater (2) and deduster (3), coal-burning boiler (1) outlet
The flue gas first via enters air preheater (2), and the oxygen produced with preheated air and air separator through major cycle wind turbine (5)
Enter coal-burning boiler after mixing.
4. the electricity generation system of the part oxygen-enriched combusting of Combined with Calcium base chain according to claim 3, which is characterized in that deduster
(3) continue to connect SAPMAC method wind turbine (7), the second tunnel of flue gas of coal-burning boiler (1) outlet conveys power, warp as the coal-fired of coal bunker
SAPMAC method wind turbine (7) carries coal dust and is sent into coal-burning boiler (1) burner hearth.
5. the electricity generation system of the part oxygen-enriched combusting of Combined with Calcium base chain according to claim 3, which is characterized in that deduster
(3) continue connect compressor (8), heat exchanger (9) and air-introduced machine (10), the flue gas third road of coal-burning boiler (1) outlet passes through pressure
Contracting machine (8), heat exchanger (9) and air-introduced machine (10) enter capture device after burning chemistry chains.
6. the electricity generation system of the part oxygen-enriched combusting of Combined with Calcium base chain according to claim 3 or 4, which is characterized in that remove
Dirt device (3) outlet is connected with desulphurization plant (4), and desulphurization plant (4) connects SAPMAC method wind turbine (7) and compressor (8).
7. the electricity generation system of the part oxygen-enriched combusting of Combined with Calcium base chain according to claim 1, which is characterized in that chemical chain
Capture device includes sequentially connected calcination reactor (12), carbon carrier cycle heat exchange equipment (13) and absorbing reaction device after burning
(11), the oxygen that air separator (19) is produced wherein is sent into calcination reactor (12) and coal combustion all the way, is CaCO3Calcining carries
The flue gas of heating load, coal-burning boiler wherein enters absorbing reaction device (11) all the way, and flue gas is in absorbing reaction device (11) imurity-removal
Including CO2And SO2；The CaCO of generation3By carbon carrier cycle heat exchange equipment (13) into calcination reactor (12) cracking and again
It is raw.
8. the electricity generation system of the part oxygen-enriched combusting of Combined with Calcium base chain according to claim 7, which is characterized in that chemical chain
Capture device connection time steam generating system after burning, secondary steam generating system include boiler circuit, secondary steam turbine (14) and secondary
Generator (18), absorbing reaction device (11) outlet connection gas cooler (20), it is cold that calcination reactor (12) connects carbon dioxide
But device (15), high-purity CO of the purifying smoke and calcination reactor (12) of absorbing reaction device (11) outlet2Heat entrained by gas
It is recycled respectively by gas cooler (20) and carbon dioxide cooler (15), to increase time steam generating system power generation
Amount.
9. the electricity generation system of the part oxygen-enriched combusting of Combined with Calcium base chain according to claim 7, which is characterized in that absorb anti-
Answer device (11) export by the high temperature purification flue gas of decarbonization, desulfuration, successively pass through gas cooler (20) and heat exchanger (9) drop
Wen Hou is discharged.
10. the CO based on electricity generation system described in claim 12Capture method, which is characterized in that with air, oxygen and recycling
Part oxygen enriching method of the gaseous mixture of flue gas as combustion adjuvant, makes coal-burning boiler exiting flue gas CO2Gas concentration is improved to 30%
~60%, this flue gas enters capture device after the burning chemistry chains based on calcium base, then carries out deep removal CO2。
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