CN208845240U - A kind of coal generating system of the part oxygen-enriched combusting of Combined with Calcium base chemical chain - Google Patents
A kind of coal generating system of the part oxygen-enriched combusting of Combined with Calcium base chemical chain Download PDFInfo
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- CN208845240U CN208845240U CN201820894996.9U CN201820894996U CN208845240U CN 208845240 U CN208845240 U CN 208845240U CN 201820894996 U CN201820894996 U CN 201820894996U CN 208845240 U CN208845240 U CN 208845240U
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- coal
- oxygen
- flue gas
- calcium base
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 81
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 81
- 239000001301 oxygen Substances 0.000 title claims abstract description 81
- 239000003245 coal Substances 0.000 title claims abstract description 51
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 title claims abstract description 39
- 239000011575 calcium Substances 0.000 title claims abstract description 37
- 229910052791 calcium Inorganic materials 0.000 title claims abstract description 37
- 239000000126 substance Substances 0.000 title claims abstract description 28
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 62
- 239000003546 flue gas Substances 0.000 claims abstract description 62
- 239000007789 gas Substances 0.000 claims abstract description 26
- 238000002485 combustion reaction Methods 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 21
- 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
- 238000010248 power generation Methods 0.000 claims abstract description 10
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 34
- 238000006243 chemical reaction Methods 0.000 claims description 31
- 238000001354 calcination Methods 0.000 claims description 25
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 14
- 238000001816 cooling Methods 0.000 claims description 13
- 230000005611 electricity Effects 0.000 claims description 10
- 239000002817 coal dust Substances 0.000 claims description 9
- 239000000779 smoke Substances 0.000 claims description 8
- 239000001569 carbon dioxide Substances 0.000 claims description 7
- 230000006835 compression Effects 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 6
- 238000000746 purification Methods 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 4
- 238000005336 cracking Methods 0.000 claims description 4
- 238000005262 decarbonization Methods 0.000 claims description 4
- 238000006477 desulfuration reaction Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 239000003517 fume Substances 0.000 claims description 3
- 229960004424 carbon dioxide Drugs 0.000 claims 2
- 229910002090 carbon oxide Inorganic materials 0.000 claims 1
- 239000003570 air Substances 0.000 abstract description 42
- 238000005516 engineering process Methods 0.000 abstract description 14
- 230000008569 process Effects 0.000 abstract description 6
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 239000002671 adjuvant Substances 0.000 abstract description 3
- 230000008901 benefit Effects 0.000 abstract description 3
- 239000008246 gaseous mixture Substances 0.000 abstract description 3
- 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
- 230000004087 circulation Effects 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L calcium carbonate Substances [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- 235000019504 cigarettes Nutrition 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
- 235000013312 flour Nutrition 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
- 239000002802 bituminous coal Substances 0.000 description 1
- 235000014171 carbonated beverage Nutrition 0.000 description 1
- 230000035568 catharsis 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
- 230000007423 decrease Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 239000002904 solvent Substances 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
-
- 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 utility model discloses a kind of coal generating systems of the part oxygen-enriched combusting of Combined with Calcium base chemical chain, and the part oxygen enriching method using the gaseous mixture of air, oxygen and flue gas recycled as combustion adjuvant makes 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 total power generation.The utility model 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 process, low energy consumption, carbon capture is high-efficient.
Description
Technical field
The utility model relates to coal-fired power generator sets and power industry CO2Capture field, in particular to a kind of Combined with Calcium base
The coal generating system of the part oxygen-enriched combusting of chemical chain.
Background technique
CO since industrial civilization, in earth atmosphere2Concentration due to the mankind production activity and steeply rise.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 amount is reduced
20%~40%, active influence will be generated to mitigation of climate change.
The CO of power industry2Trapping captures 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 that boiler tail is arranged
The recycled system of the 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's efficiency reduces by 8~10% or so, considerably increases cost of electricity-generating, seriously constrain the development of the technology.
In addition, to will lead to boiler in-furnace temperature higher for oxygen-enriched combusting, both need to increase powerful recirculation blower newly, be passed through a large amount of circulations
To maintain ignition temperature, furnace body is also needed using heat-resisting material flue gas.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, thus 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 decline, reduces CO2Catch rate.
Burning chemistry chains based on calcium base have CO2The characteristics of separation, separately as catching mode after burning, carbon carrier with
CO2The smoke reaction activity that concentration is 10~15% or so is slightly poor, CO2Catch rate is not high, but it is real convenient for coupling with other systems
Existing CO2Efficiently capture.
Utility model content
The shortcomings that the purpose of the utility model is to overcome the prior arts and insufficient provides a kind of Combined with Calcium base chemical chain
Oxygen demand and oxygen energy processed is effectively reduced while realizing part Rich Oxygen Combustion in the coal generating system of part oxygen-enriched combusting
Consumption, captures CO after realizing the burning based on calcium base chemical chain2While, enhance carbon carrier reactivity, improves CO2Capture effect
Rate and generated energy.
The purpose of this utility model is realized by the following technical solution:
A kind of coal generating system of the part oxygen-enriched combusting of Combined with Calcium base chemical chain, comprising: flue gas recirculation part is oxygen-enriched
Coal-burning boiler, main steam electricity generation system, capture device after the burning chemistry chains based on calcium base, 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) acting, 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 blower (5) connects back to air preheater (2) again, and 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) through major cycle blower (5), and and preheated air
Enter coal-burning boiler after the oxygen mix produced with air separator.
Further, deduster (3) continues to connect SAPMAC method blower (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, coal dust is carried through SAPMAC method blower (7) and is 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 passes through compressor (8), heat exchanger (9) and air-introduced machine (10) and enters capture device after burning chemistry chains.
Preferably, deduster (3) outlet is connected with desulphurization plant (4), and desulphurization plant (4) connects SAPMAC method blower (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) flue gas exported third road after desulphurization plant (4) purification pass through 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
Burn reactor (12) cracking and regeneration.
Preferably, capture device connects time steam generating system after burning chemistry chains, and 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 purifying smoke of absorbing reaction device (11) outlet and the height of calcination reactor (12)
Pure CO2Gas temperature is high, and entrained heat passes through gas cooler (20) respectively and carbon dioxide cooler (15) is recovered benefit
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 by 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.
The utility model compared with prior art, is had the following advantages and beneficial effects:
(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 can be reduced required amount of oxygen and amount of circulating gas, so that the energy consumption of air separator and circulating fan is reduced,
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 blower 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.
Detailed description of the invention
Fig. 1 is embodiment system structure diagram.
In Fig. 1: 1- boiler；2- air preheater；3- deduster；4- desulphurization plant；5- major cycle blower；The main steamer of 6-
Machine；7- SAPMAC method blower；8- compressor；9- heat exchanger；10- air-introduced machine；11- absorbing reaction device；12- calcination reactor；13- is carried
Carbon body circulation heat exchange equipment；14- steam turbine；15- carbon dioxide cooler, 16- carbon-dioxide gas compressor；17- main generator；
18- generator；19- air separator；20- gas cooler, 21- ash bucket.
Specific embodiment
The present invention will be further described in detail with reference to the embodiments and the accompanying drawings, but the implementation of the utility model
Mode is without being limited thereto.
Embodiment 1
A kind of coal generating system of the part oxygen-enriched combusting of Combined with Calcium base chemical chain, with air, oxygen and recycling cigarette
Part oxygen enriching method of the gaseous mixture of gas as combustion adjuvant, makes 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, then carries out deep removal CO2。
The coal generating system of the part oxygen-enriched combusting of Combined with Calcium base chemical chain mainly includes 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) acting, 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 after mixing with preheated air and part through the circulating flue gas of dust separation；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 blower (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 removes 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, which reacts, to be provided, 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 above scheme, absorbing reaction device (11) outlet by the high temperature purification flue gas of decarbonization, desulfuration, successively through overloading
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 above scheme, 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 be reduced SO2Sulfides, subsequent calcium base
Chain catching mode is learned to sulfide also certain catharsis, because if 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 guarantee to meet the requirement of China's most tight discharge standard newest to power plant's gas pollutant, desulphurization plant (4) is still needed 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, it is using the gaseous mixture of air, oxygen and flue gas recycled as combustion adjuvant, and wherein the mass flow of oxygen is
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, is removed in depth, CO2Capturing efficiency improve to 97.6%.
The coal generating system of the part oxygen-enriched combusting of Combined with Calcium base chemical chain mainly includes 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) acting, 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 after mixing with preheated air and part through the circulating flue gas of dust separation；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), coal dust is carried through SAPMAC method blower (7) and is sent into burner hearth, circulation
The quality total flow of flue gas is that 616kg/s, the wherein first via and the ratio of the second road circulating flue gas are 8:2, and coal dust amount is 42kg/
S, under conventional air burning condition, oxygen content is relatively high in air, and coal pulverizer explodes in order to prevent, powder feeding temperature highest
No more than 120 DEG C；It will not be occurred quick-fried using circulating flue gas powder feeding because oxygen content is very low in flue gas under the conditions of oxygen-enriched combusting
Fried danger, the smoke temperature into flour mill can be at 200 DEG C or so；And remaining flue gas is followed by compressor (8), heat exchanger (9)
With air-introduced machine (10), the absorbing reaction device (11) for the system that captures, the quality stream of remaining flue gas are entered after burning chemistry chains with 170 DEG C
Amount is 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 removes 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, which reacts, to be provided, and the amount of oxygen and coal dust amount of entrance are 61.3kg/s and 23.4kg/s respectively.And absorbing reaction device
It (11) is strong exothermal reaction, the waste heat of generation is by boiler circuit with time steam turbine (14) for generating electricity.
The absorbing reaction device (11) outlet by the high temperature purification flue gas of decarbonization, desulfuration, it is successively cooling through overload flue gas
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 guarantee 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 total power generation rises to 478.6MW), discovery Combined with Calcium base chemical chain
The thermal efficiency of the coal generating system of part oxygen-enriched combusting falls to 29.8%, but total power generation rises to 622.2MW.Combined with Calcium
The coal generating system of the part oxygen-enriched combusting of base chemical chain, CO2Capturing efficiency be 97.6%, hence it is evident that be higher than oxygen-enriched combusting skill
The CO of art about 90%2The CO of capturing efficiency and calcium base burning chemistry chains capturing technology about 80~85%2Capturing efficiency.
Above-described embodiment is the preferable embodiment of the utility model, but the embodiments of the present invention is not by above-mentioned
The limitation of embodiment, it is made under other any spiritual essence and principles without departing from the utility model to change, modify, replacing
In generation, simplifies combination, should be equivalent substitute mode, is included within the protection scope of the utility model.
Claims (10)
1. a kind of coal generating system of the part oxygen-enriched combusting of Combined with Calcium base chemical chain characterized by comprising flue gas recirculation
The oxygen-enriched coal-burning boiler in part, main steam electricity generation system, capture device after the burning chemistry chains based on calcium base, CO2Cooling compression dress
It sets 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
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 coal generating system of the part oxygen-enriched combusting of Combined with Calcium base chemical chain according to claim 1, feature exist
In the progress part oxygen-enriched combusting in coal-burning boiler, generated heat pushes main steam turbine (6) to do by main steam/water circulating
Function, main generator (17) power generation.
3. the coal generating system of the part oxygen-enriched combusting of Combined with Calcium base chemical chain according to claim 1, feature exist
In again fire coal boiler fume outlet is sequentially connected air preheater (2) and deduster (3), and deduster connects through major cycle blower (5)
It takes back air preheater (2), the flue gas of coal-burning boiler (1) outlet passes through air preheater (2) and deduster (3), coal-burning boiler
(1) export the flue gas first via through major cycle blower (5) enter air preheater (2), and with preheated air and air separator
Enter coal-burning boiler after the oxygen mix produced.
4. the coal generating system of the part oxygen-enriched combusting of Combined with Calcium base chemical chain according to claim 3, feature exist
In deduster (3) continues to connect SAPMAC method blower (7), and the second tunnel of flue gas of coal-burning boiler (1) outlet is defeated as the fire coal of coal bunker
Power is sent, coal dust is carried through SAPMAC method blower (7) and is sent into coal-burning boiler (1) burner hearth.
5. the coal generating system of the part oxygen-enriched combusting of Combined with Calcium base chemical chain according to claim 3, feature exist
In deduster (3) continues connect compressor (8), heat exchanger (9) and air-introduced machine (10), the flue gas third of coal-burning boiler (1) outlet
Road passes through compressor (8), heat exchanger (9) and air-introduced machine (10) and enters capture device after burning chemistry chains.
6. the coal generating system of the part oxygen-enriched combusting of Combined with Calcium base chemical chain according to claim 3 or 4, feature
It is, deduster (3) outlet is connected with desulphurization plant (4), and desulphurization plant (4) connects SAPMAC method blower (7) and compressor (8).
7. the coal generating system of the part oxygen-enriched combusting of Combined with Calcium base chemical chain according to claim 1, feature exist
In, after burning chemistry chains capture device include sequentially connected calcination reactor (12), carbon carrier cycle heat exchange equipment (13) and
Absorbing reaction device (11), the oxygen that air separator (19) is produced wherein are sent into calcination reactor (12) and coal combustion, combustion all the way
The flue gas of coal burning boiler wherein enters absorbing reaction device (11) all the way, and flue gas includes CO in absorbing reaction device (11) imurity-removal2With
SO2；The CaCO of generation3Enter calcination reactor (12) cracking by carbon carrier cycle heat exchange equipment (13) and regenerates.
8. the coal generating system of the part oxygen-enriched combusting of Combined with Calcium base chemical chain according to claim 7, feature exist
In capture device connects time steam generating system after burning chemistry chains, and secondary steam generating system includes boiler circuit, secondary steam turbine
(14) and time generator (18), absorbing reaction device (11) outlet connection gas cooler (20), calcination reactor (12) connect two
Carbonoxide cooler (15), the purifying smoke of absorbing reaction device (11) outlet and high-purity CO of calcination reactor (12)2Gas institute
Carrying heat passes through gas cooler (20) respectively and carbon dioxide cooler (15) is recycled, to increase time steam-electric power
System generated energy.
9. the coal generating system of the part oxygen-enriched combusting of Combined with Calcium base chemical chain according to claim 7, feature exist
In the outlet of, absorbing reaction device (11) by the high temperature purification flue gas of decarbonization, desulfuration, successively by gas cooler (20) and change
After hot device (9) cooling, it is discharged.
10. the coal generating system of the part oxygen-enriched combusting of Combined with Calcium base chemical chain according to claim 3, feature exist
In deduster (3) is also connect with ash bucket (21).
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| CN201820894996.9U CN208845240U (en) | 2018-06-08 | 2018-06-08 | A kind of coal generating system of the part oxygen-enriched combusting of Combined with Calcium base chemical chain |
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| CN201820894996.9U CN208845240U (en) | 2018-06-08 | 2018-06-08 | A kind of coal generating system of the part oxygen-enriched combusting of Combined with Calcium base chemical chain |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108729965A (en) * | 2018-06-08 | 2018-11-02 | 华南理工大学 | The electricity generation system and CO of the part oxygen-enriched combusting of Combined with Calcium base chain2Capture method |
| CN110375285A (en) * | 2019-08-14 | 2019-10-25 | 彭万旺 | Efficient burning cooling system and gas cooler |
-
2018
- 2018-06-08 CN CN201820894996.9U patent/CN208845240U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108729965A (en) * | 2018-06-08 | 2018-11-02 | 华南理工大学 | The electricity generation system and CO of the part oxygen-enriched combusting of Combined with Calcium base chain2Capture method |
| CN108729965B (en) * | 2018-06-08 | 2023-11-03 | 华南理工大学 | Power generation system combining partial oxygen-enriched combustion of calcium-based chain and CO 2 Trapping method |
| CN110375285A (en) * | 2019-08-14 | 2019-10-25 | 彭万旺 | Efficient burning cooling system and gas cooler |
| CN110375285B (en) * | 2019-08-14 | 2024-02-06 | 彭万旺 | Efficient combustion cooling system and flue gas cooler |
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