CN206637608U - A kind of efficient oxygen-enriched combustion boiler tail flue gas energy utilization and processing system - Google Patents
A kind of efficient oxygen-enriched combustion boiler tail flue gas energy utilization and processing system Download PDFInfo
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- 239000003546 flue gas Substances 0.000 title claims abstract description 196
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 194
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 73
- 239000001301 oxygen Substances 0.000 title claims abstract description 73
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 73
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 45
- 238000012545 processing Methods 0.000 title claims abstract description 31
- 239000003245 coal Substances 0.000 claims abstract description 46
- 206010022000 influenza Diseases 0.000 claims abstract description 24
- 238000004064 recycling Methods 0.000 claims abstract description 23
- 230000033228 biological regulation Effects 0.000 claims abstract description 13
- 239000003595 mist Substances 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 36
- 239000007789 gas Substances 0.000 claims description 28
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 27
- 238000011084 recovery Methods 0.000 claims description 25
- 239000002918 waste heat Substances 0.000 claims description 24
- 238000007791 dehumidification Methods 0.000 claims description 23
- 239000003517 fume Substances 0.000 claims description 18
- 238000009834 vaporization Methods 0.000 claims description 16
- 230000008016 vaporization Effects 0.000 claims description 16
- 238000010438 heat treatment Methods 0.000 claims description 12
- 238000009833 condensation Methods 0.000 claims description 8
- 230000005494 condensation Effects 0.000 claims description 8
- 230000005611 electricity Effects 0.000 claims description 8
- 239000002817 coal dust Substances 0.000 claims description 7
- 238000010521 absorption reaction Methods 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 4
- 239000000284 extract Substances 0.000 claims description 2
- 239000004744 fabric Substances 0.000 claims 1
- 230000001172 regenerating effect Effects 0.000 abstract description 7
- 208000011580 syndromic disease Diseases 0.000 abstract description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 18
- 229910002092 carbon dioxide Inorganic materials 0.000 description 10
- 238000005265 energy consumption Methods 0.000 description 9
- 229910052757 nitrogen Inorganic materials 0.000 description 9
- 235000019504 cigarettes Nutrition 0.000 description 7
- 230000008878 coupling Effects 0.000 description 7
- 238000010168 coupling process Methods 0.000 description 7
- 238000005859 coupling reaction Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 238000005260 corrosion Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 238000006477 desulfuration reaction Methods 0.000 description 4
- 230000023556 desulfurization Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 235000013305 food Nutrition 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 230000001965 increasing effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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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
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Abstract
A kind of efficient oxygen-enriched combustion boiler tail flue gas energy utilization and processing system that the utility model embodiment provides, realize and the air separator system of oxygen-enriched combustion boiler and flue gas recirculation system and tail flue gas energy regenerating processing system are coupled, boiler back end ductwork is divided into three parallel flues, flue gas recycled amount and temperature are adjusted, improves adaptability of the system to coal；Pass through low-pressure coal saver Mist heat recovering；Adjust air preheater outlet oxygen temperature；Three parallel flues intercouple, and increase the regulation nargin of flue-gas temperature.Using high-temperature flue gas with the recycling mixed flue gas recycled of low-temperature flue gas as First air, avoid the occurrence of the phenomenon that the relatively low vapor for causing flue gas recirculation the to accumulate liquefaction of a wind-warm syndrome blocks pulverized coal channel, air preheater volume is reduced, it is cost-effective, improve economy.
Description
Technical field：
The utility model belongs to boiler tail flue gas energy utilization and process field, is specifically designed a kind of efficient oxygen-enriched combustion
Burning boiler tail flue gas energy utilization and processing system.
Background technology：
With the aggravation of global warming and the frequent generation of extreme weather, the whole world for greenhouse gas emission attention rate with
Day all increasings.In the future for a long period of time, coal will be as the fossil energy mainly used.Due to China energy resource structure with
Based on coal, therefore coal fired thermal power plant is the main force of China's Electric Power Industry.Nineteen fifty-two, Mei electricity Zhan China total installation of generating capacity
90.4%, account for the 82.2% of gross generation；Although later proportion has declined, hold to Mei electricity Reng Zhan China total installed capacity in 2000
The 74.4% of amount, accounts for the 81.0% of gross generation.Coal discharges a large amount of CO in combustion2, CO2Emission reduction problem will turn into one
Long-range circumstances problem urgently to be resolved hurrily.Therefore, CO2Extensive concern of the capture with Plugging Technology Applied by countries in the world researcher, and
Oxygen-enriched combustion technology is considered as certainly most promising carbon trapping Plugging Technology Applied.
Compared with conventional air is burnt, due to introducing air separation equipment and carbon dioxide compression in oxygen-enriched combustion boiler
Liquefying plant, power plants generating electricity efficiency is caused to decline 8% or so.In order to improve generating efficiency as far as possible, energy utilization rate is improved, with
Conventional air burning is compared, and should try one's best reduces flue-gas temperature, and multistage recycling is carried out to boiler tail flue gas waste heat.
In oxygen-enriched combustion boiler, mixed by the use of the pure oxygen that air separator is isolated with flue gas recycled and be used as combustion-supporting gas
Boiler furnace is sent into, the purpose for using flue gas recirculation is with the CO in flue gas2To replace the N in combustion air2With O2Join together
With burning, furnace high-temperature is neutralized, avoids water-cooling wall film boiling.Generally convey and dry by the use of flue gas recycled as First air
Coal dust.
Due to constantly being accumulated using flue gas recirculation, vapor in oxygen-enriched combusting, cause in First air water vapour content compared with
Height, if flue gas recycled temperature is too low, Water vapor condensation, pulverized coal channel is easily blocked, and be unfavorable for coal powder ignition；Together
When, after dehumidifying, vapor volume fraction reduces boiler tail flue gas, significantly reduces flue gas acid dew point temperature, is advantageous to
Mitigate the acid corrosion of heating surface metal；And temperature reduces after fume-dehydrating, under identical mass flow, flue gas volume flow
Reduce, recirculation blower power consumption reduces.
The high fume temperature of boiler, it is always the problem that annoying people in addition, in thermal power plant.Only
Because energy loss caused by exhaust gas temperature height is with regard to considerable.According to statistics, in thermal power plant, boiler exhaust gas heat waste
Mistake accounts for the 70%~80% of boiler Total heat loss.Meanwhile as the increase of boiler operation time, heating surface retrofit degree are aggravated,
Cause exhaust gas temperature higher than design temperature 20 DEG C~30 DEG C.The exhaust gas temperature of boiler is too high, increases thermal power plant coal consumption amount
Add.And the exhaust gas temperature of Chinese active service coal-burning power plant has generally reached 120 DEG C~130 DEG C at present, therefore heat loss due to exhaust gas turns into pot
Proportion is maximum in stove various heat losses one.Thermal generation unit for being equipped with independent desulphurization system, too high flue gas temperature
Degree can also carry a large amount of steam in desulfurization, increase desulfurization water consume.Therefore it is very big to be not only a potentiality for boiler exhaust gas heat energy
Residual heat resources, and the flue gas after temperature reduction can also reduce desulfurization water consume, save water resource.
In oxygen-enriched combustion boiler system, compared with conventional air burning boiler, air-seperation system and CO are added2Pressure
Contracting liquefaction recovery system, system complexity improve.How boiler tail flue gas ability to be utilized and processing system and oxygen-enriched combusting
The problem of steam generator system couples, and realizes that energy synthesis recycles, and raising generating efficiency is current urgent need to resolve.
Utility model content
A kind of efficient oxygen-enriched combustion boiler tail flue gas energy utilization and processing system that the utility model embodiment provides
System, realize and handle the air separator system of oxygen-enriched combustion boiler and flue gas recirculation system and tail flue gas energy regenerating
It is system coupled, boiler back end ductwork is divided into three parallel flues, adjusts flue gas recycled amount and temperature, improves system to coal
The adaptability of kind；Pass through low-pressure coal saver Mist heat recovering；Adjust air preheater outlet oxygen temperature；Three parallel flues are mutual
Coupling, increase the regulation nargin of flue-gas temperature.Made using high-temperature flue gas and the mixed flue gas recycled of recycling low-temperature flue gas
For First air, avoid the occurrence of the relatively low vapor for causing flue gas recirculation the to accumulate liquefaction of a wind-warm syndrome and block showing for pulverized coal channel
As, air preheater volume is reduced, it is cost-effective, improve economy.
A kind of efficient oxygen-enriched combustion boiler tail flue gas energy utilization and processing system that the utility model embodiment provides
System, including：Boiler body (1), burner (2), economizer (3), back-end ductwork are divided into three parallel flues, and respectively first is flat
Row flue (4), the second parallel flue (5) flue (6) parallel with the 3rd, steam air heater (9), deduster (10), recirculation blower
(11), pressure fan (12), primary dehydrating unit (13), deep dehumidification apparatus (14), pressure fan (15), desulfuring and denitrifying apparatus
(16), waste-heat recovery device (17), compressor (18), air separator (19)；
Boiler body (1) inwall is provided with the burner (2), the burner (2) and the pressure fan (12)
Connect, the economizer (3) is provided with boiler body (1) back-end ductwork, be provided with below the economizer (3) described
First parallel flue (4), the second parallel flue (5) flue (6) parallel with the 3rd；
Arrangement low-pressure coal saver (7) in the second parallel flue (5), the middle arrangement air of the 3rd parallel flue (6)
Preheater (8).
Alternatively, the described first parallel flue (4) is connected with the recirculation blower (11), the arrangement low-pressure coal saver
(7), the air preheater (8) is connected with the steam air heater (9), and the steam air heater (9) is connected with the deduster (10).
Alternatively, the deduster (10), the recirculation blower (11) and the primary dehydrating unit (13) are described
Deep dehumidification apparatus (14), the desulfuring and denitrifying apparatus (16) are sequentially connected；
The steam air heater (9) is connected with the deep dehumidification apparatus (14), the deep dehumidification apparatus (14) and the sky
Gas separating device (19) connects, the air separator (19), the desulfuring and denitrifying apparatus (16) and the waste-heat recovery device
(17) connect, the waste-heat recovery device (17) is connected with the compressor (18).
Alternatively, boiler back end ductwork is divided into three parallel flues, the respectively first parallel flue (4), the second parallel cigarette
It is vacant in road (5) flue (6) parallel with the 3rd, high-temperature flue gas and recycling low-temperature flue gas are mixed, improve flue gas recycled temperature
Degree, flue gas recycled needs not move through air preheater heating, therefore air preheater need to only be used for preheated oxygen, and it is pre- to reduce air
Hot body product, it is cost-effective, improve economy；Flue gas recycled temperature is adjusted by corresponding gas baffle, improves system pair
The adaptability of coal；Mixed flue gas recycled carries coal dust by pressure fan (12) and is sent into boiler furnace；Second parallel cigarette
Arrangement low-pressure coal saver (7), Mist heat recovering heating boiler feed water in road (5)；Arrangement air in 3rd parallel flue (6)
Preheater (8), oxygen is heated using fume afterheat, exhaust gas volumn is adjusted by corresponding gas baffle, so as to adjust air preheat
Device exports the temperature of oxygen；Three parallel flues are mutually coupled, and increase the regulation nargin of flue-gas temperature.
Alternatively, the flue gas of discharge enters steam air heater (9) from the second parallel flue (5) flue (6) parallel with the 3rd, sharp
Oxygen is heated with fume afterheat.
Alternatively, dedusting is carried out by deduster (10) by the flue gas of steam air heater (9), extracted low after a part of dedusting
Warm flue gas is sent into the first parallel flue (4) by recirculation blower (11) is mixed for flue gas recirculation with high-temperature flue gas；It is logical
The corresponding gas baffle regulation flue gas recycled temperature of the first parallel flue (4) is crossed, improves adaptability of the system to coal.Remaining
Flue gas sequentially enters primary dehydrating unit (13) and deep dehumidification apparatus (14).
Alternatively, primary dehydrating unit (13) makes the water vapor condensation in flue gas using cold water absorption fume afterheat, so as to
Reach the purpose of removal moisture drying, absorb the domestic water that the hot water after fume afterheat can be used near power station resident, improve energy
Utilization ratio, save the energy.
Alternatively, deep dehumidification apparatus (14) makes full use of the cold energy for the liquid oxygen that air separator isolates, vaporization of liquid oxygen
Heat absorption dehumidifying, the oxygen after vaporization is sequentially sent to be sent into after steam air heater (9) and air preheater (8) preheating by air-introduced machine (15) to be fired
Burner (2)；On the one hand it can make full use of the cold energy of liquid oxygen that flue gas is further dried, facilitate the recovery of follow-up flue gas；The opposing party
Face, it is not necessary to gaseous state oxygen can be obtained using special vaporization of liquid oxygen device, reduce station-service electricity, improve generating efficiency.
Alternatively, dehumidified by dedusting and the flue gas after the waste heat that is fully utilized is liquefied as liquid by compressor (18)
CO2Seal up for safekeeping.
As can be seen from the above technical solutions, the utility model embodiment has advantages below：
The utility model provides a kind of efficient oxygen-enriched combustion boiler tail flue gas energy utilization and processing system, and this is
Unite the air separator system of oxygen-enriched combustion boiler and flue gas recirculation system and tail flue gas energy regenerating processing system phase
Coupling, boiler back end ductwork is divided into three parallel flues, adjusts flue gas recycled amount and temperature, the system of raising is fitted to coal
Ying Xing；Pass through low-pressure coal saver Mist heat recovering；Adjust air preheater outlet oxygen temperature；Three parallel flues intercouple,
Increase the regulation nargin of flue-gas temperature.Using high-temperature flue gas with the mixed flue gas recycled of recycling low-temperature flue gas as once
Wind, the phenomenon that the relatively low vapor for causing flue gas recirculation the to accumulate liquefaction of a wind-warm syndrome blocks pulverized coal channel is avoided the occurrence of, is reduced
Air preheater volume, it is cost-effective, improve economy.
Flue gas after dedusting removes the recycling low-temperature flue gas extracted, successively by primary dehydrating unit and depth dehumidifying dress
Put, be easy to the recovery of follow-up flue gas, avoid low-temperature corrosion；And by energy regenerating processing system and oxygen-enriched combustion boiler air point
Coupled from system, make full use of the cold energy of isolated liquid oxygen, absorbed fume afterheat, Water vapor condensation is reached depth drying
Purpose；The complexity of oxygen-enriched combustion system is reduced simultaneously, without setting vaporization of liquid oxygen device, is reduced energy consumption, is improved energy utilization
Rate.Cool water heating is hot water by primary dehydrating unit, and the hot water can be used for the domestic water of near power station resident.
Flue gas after dehumidifying is empty with oxygen-enriched combustion boiler by waste heat recovery device after desulfuring and denitrifying apparatus
Gas separating system couples, and using the cold energy of isolated low temperature nitrogen, the heat in further recovered flue gas, enters flue-gas temperature
One step reduces, and obtains low-temperature flue gas, reduces CO2Energy consumption during compressing and liquefying, compressor power consumption reduce, and improve energy profit
Use efficiency；Meanwhile by the flue gas waste heat recovery of boiler tail and energy processing system and oxygen-enriched combustion boiler air-seperation system
Coupling, the cold energy of liquid oxygen and low temperature nitrogen is made full use of, Mist heat recovering, smoke processing system energy consumption is reduced, realizes the energy
Reasonable utilization.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, drawings in the following description are only
It is some embodiments of the utility model, for those of ordinary skill in the art, before creative labor is not paid
Put, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 be a kind of efficient oxygen-enriched combustion boiler tail flue gas energy utilization for being provided in the utility model embodiment and
One embodiment structural representation of processing method；
Illustrate：1 is boiler body, and 2 be burner, and 3 be economizer, and 4 be that the first parallel flue (is used to mix height
Warm flue gas and recycling low-temperature flue gas), 5 be the second parallel flue (being used to arrange low-pressure coal saver), 6 be the 3rd parallel flue
(being used to arrange air preheater), 7 be low-pressure coal saver, and 8 be air preheater, and 9 be steam air heater, and 10 be deduster, and 11 is again
Circulating fan, 12 be pressure fan, and 13 be primary dehydrating unit, and 14 be deep dehumidification apparatus, and 15 be pressure fan, and 16 take off for desulfurization
Nitre device, 17 be waste-heat recovery device, and 18 be compressor, and 19 be air separator.
Embodiment
A kind of efficient oxygen-enriched combustion boiler tail flue gas energy utilization and processing system that the utility model embodiment provides
System, realize and handle the air separator system of oxygen-enriched combustion boiler and flue gas recirculation system and tail flue gas energy regenerating
It is system coupled, boiler back end ductwork is divided into three parallel flues, adjusts flue gas recycled amount and temperature, improves system to coal
The adaptability of kind；Pass through low-pressure coal saver Mist heat recovering；Adjust air preheater outlet oxygen temperature；Three parallel flues are mutual
Coupling, increase the regulation nargin of flue-gas temperature.Made using high-temperature flue gas and the mixed flue gas recycled of recycling low-temperature flue gas
For First air, avoid the occurrence of the relatively low vapor for causing flue gas recirculation the to accumulate liquefaction of a wind-warm syndrome and block showing for pulverized coal channel
As, air preheater volume is reduced, it is cost-effective, improve economy.
, below will knot to enable purpose of utility model of the present utility model, feature, advantage more obvious and understandable
The accompanying drawing in the utility model embodiment is closed, the technical scheme in the embodiment of the utility model is clearly and completely described,
Obviously, the embodiments described below are only the utility model part of the embodiment, and not all embodiment.Based on this reality
With the embodiment in new, those of ordinary skill in the art are obtained all other under the premise of creative work is not made
Embodiment, belong to the scope of the utility model protection.
A kind of referring to Fig. 1, efficient oxygen-enriched combustion boiler tail flue gas energy provided in the utility model embodiment
Using and one embodiment of processing system include：
Boiler body (1), burner (2), economizer (3), back-end ductwork are divided into three parallel flues, and respectively first is flat
Row flue (4), the second parallel flue (5) flue (6) parallel with the 3rd, steam air heater (9), deduster (10), recirculation blower
(11), pressure fan (12), primary dehydrating unit (13), deep dehumidification apparatus (14), pressure fan (15), desulfuring and denitrifying apparatus
(16), waste-heat recovery device (17), compressor (18), air separator (19)；
Boiler body (1) inwall is provided with the burner (2), the burner (2) and the pressure fan (12)
Connect, the economizer (3) is provided with boiler body (1) back-end ductwork, be provided with below the economizer (3) described
First parallel flue (4), the second parallel flue (5) flue (6) parallel with the 3rd；
Arrangement low-pressure coal saver (7) in the second parallel flue (5), the middle arrangement air of the 3rd parallel flue (6)
Preheater (8).
Alternatively, the described first parallel flue (4) is connected with the recirculation blower (11), the arrangement low-pressure coal saver
(7), the air preheater (8) is connected with the steam air heater (9), and the steam air heater (9) is connected with the deduster (10).
Alternatively, the deduster (10), the recirculation blower (11) and the primary dehydrating unit (13) are described
Deep dehumidification apparatus (14), the desulfuring and denitrifying apparatus (16) are sequentially connected；
The steam air heater (9) is connected with the deep dehumidification apparatus (14), the deep dehumidification apparatus (14) and the sky
Gas separating device (19) connects, the air separator (19), the desulfuring and denitrifying apparatus (16) and the waste-heat recovery device
(17) connect, the waste-heat recovery device (17) is connected with the compressor (18).
Alternatively, boiler back end ductwork is divided into three parallel flues, the respectively first parallel flue (4), the second parallel cigarette
Road (5) flue (6) parallel with the 3rd, it is vacant in the first parallel flue (4), high-temperature flue gas and recycling low-temperature flue gas are mixed,
Flue gas recycled temperature is improved, flue gas recycled needs not move through air preheater heating, therefore air preheater need to only be used in advance
Hot oxygen, air preheater volume is reduced, it is cost-effective, improve economy；Recycling cigarette is adjusted by corresponding gas baffle
Temperature degree, improve adaptability of the system to coal；Mixed flue gas recycled carries coal dust by pressure fan (12) and is sent into pot
Stove burner hearth；Arrangement low-pressure coal saver (7), Mist heat recovering heating boiler feed water in second parallel flue (5)；3rd parallel cigarette
Arrangement air preheater (8) in road (6), oxygen is heated using fume afterheat, and exhaust gas volumn is adjusted by corresponding gas baffle, from
And adjust the temperature of air preheater outlet oxygen.Three parallel flues are mutually coupled, and increase the regulation nargin of flue-gas temperature.
Alternatively, the flue gas of discharge enters steam air heater (9) from the second parallel flue (5) flue (6) parallel with the 3rd, sharp
Oxygen is heated with fume afterheat.
Alternatively, dedusting is carried out by deduster (10) by the flue gas of steam air heater (9), extracted low after a part of dedusting
Warm flue gas is sent into the first parallel flue (4) by recirculation blower (11) is mixed for flue gas recirculation with high-temperature flue gas；It is logical
The corresponding gas baffle regulation flue gas recycled temperature of the first parallel flue (4) is crossed, improves adaptability of the system to coal.Remaining
Flue gas sequentially enters primary dehydrating unit (13) and deep dehumidification apparatus (14).
Alternatively, primary dehydrating unit (13) makes the water vapor condensation in flue gas using cold water absorption fume afterheat, so as to
Reach the purpose of removal moisture drying, absorb the domestic water that the hot water after fume afterheat can be used near power station resident, improve energy
Utilization ratio, save the energy.
Alternatively, deep dehumidification apparatus (14) makes full use of the cold energy for the liquid oxygen that air separator isolates, vaporization of liquid oxygen
Heat absorption dehumidifying, the oxygen after vaporization is sequentially sent to be sent into after steam air heater (9) and air preheater (8) preheating by air-introduced machine (15) to be fired
Burner (2)；On the one hand it can make full use of the cold energy of liquid oxygen that flue gas is further dried, facilitate the recovery of follow-up flue gas；The opposing party
Face, it is not necessary to gaseous state oxygen can be obtained using special vaporization of liquid oxygen device, reduce station-service electricity, improve generating efficiency.
Alternatively, the flue gas by dedusting dehumidifying enters waste-heat recovery device (17) after desulfuring and denitrifying apparatus (16),
On the one hand, make full use of air separation plant to obtain the cold energy of low temperature nitrogen, flue-gas temperature is further reduced, obtain low-temperature flue gas,
Reduce CO2The energy consumption of process is compressed and liquefied, improves power plant efficiency；On the other hand, the nitrogen of acquisition can be used for food processing
Food is fresh-keeping in industry.
Alternatively, dehumidified by dedusting and the flue gas after the waste heat that is fully utilized is liquefied as liquid by compressor (18)
CO2Seal up for safekeeping.
Boiler body 1, burner 2, economizer 3, wherein the first parallel flue 4, high-temperature flue gas and recycling low-temperature flue gas
Coal dust is carried after mixing and enters boiler furnace, the second parallel flue 5, wherein low-pressure coal saver is arranged, the 3rd parallel flue 6, its
Middle arrangement air preheater, low-pressure coal saver 7, air preheater 8, steam air heater 9, deduster 10, recirculation blower 11, air-supply
Machine 12, primary dehydrating unit 13, deep dehumidification apparatus 14, pressure fan 15, desulfuring and denitrifying apparatus 16, waste-heat recovery device 17, pressure
Contracting machine 18, air separator 19；Wherein：
Boiler back end ductwork is divided into three parallel flues, and the first parallel flue 4 is used for high-temperature flue gas and recycling low temperature
Flue gas recycled is used as after flue gas mixing, coal dust is carried after pressure fan 12 and is sent into burner 2, meets fire box temperature and changes
Heat needs；On the one hand air preheater is needed not move through using high-temperature flue gas heating recycling low-temperature flue gas, recycling low-temperature flue gas
Preheated, reduce air preheater volume, reduce cost, improve economy；On the other hand, mixed flue gas recycled temperature
Degree is higher, and the vapor of flue gas recirculation process accumulation is not easy to condense, and avoids blocking pulverized coal channel.By adjusting corresponding flue
Gas baffle adjusts flue gas recycled amount and temperature, improves adaptability of the system to coal；Low pressure is arranged in second parallel flue 5
The Mist heat recovering of economizer 7, using fume afterheat heating boiler feed water, improve generating efficiency；Arranged in 3rd parallel flue 6
Air preheater 8 heats oxygen, and air preheater outlet oxygen temperature is adjusted by adjusting corresponding gas baffle；Three parallel flues
Intercouple, increase the regulation nargin of flue-gas temperature；
The flue gas of second parallel 5 flue 6 parallel with the 3rd of flue discharge first passes through steam air heater 9, is heated using fume afterheat
Oxygen；Afterwards dust removal process is carried out by deduster 10；Low-temperature flue gas after dedusting extracts one by recirculation blower 11
Divide flue gas to be sent into the first vacant parallel flue 4, by pressure fan 12 after being mixed with high-temperature flue gas, carry coal dust and be sent into boiler
Burner hearth, meet the needs of fire box temperature and heat exchange；
Remaining flue gas dehumidifies by primary dehydrating unit 13 and deep dehumidification apparatus 14 successively；Primary dehydrating unit 13 utilizes
Cold water absorbs fume afterheat as heat transferring medium, makes Water vapor condensation in flue gas, absorbs the hot water that flue gas heat obtains and can be used for
The domestic water of near power station resident；The vaporization of liquid oxygen process that deep dehumidification apparatus 14 is isolated using air separator 19 absorbs
Heat in flue gas, makes full use of the cold energy of liquid oxygen, further removes the vapor in flue gas, is CO in flue gas2Trapping and
Seal up for safekeeping and prepare；Meanwhile vaporization of liquid oxygen is set to obtain gaseous state combustion-supporting gas using the heat in flue gas, it is no longer necessary to set special
Vaporization of liquid oxygen device, the complexity of oxygen-enriched combustion boiler system is reduced, reduce station-service electricity, improve power plant efficiency；
Flue gas after dedusting dehumidifying, into waste-heat recovery device 17, is separated after desulfuring and denitrifying apparatus 16 using air
Device 19 obtains the cold energy of low temperature nitrogen, absorbs the heat in flue gas, flue-gas temperature is further reduced, obtain low-temperature flue gas, subtract
Few CO2The energy consumption of process is compressed and liquefied, improves generating efficiency；Meanwhile by the flue gas waste heat recovery of boiler tail and energy utilization
System couples with oxygen-enriched combustion boiler system, makes full use of the cold energy of liquid oxygen and low temperature nitrogen, realizes the comprehensive utilization of energy；Most
Flue gas is liquid CO by the liquefaction of compressor 18 afterwards2Sealed up for safekeeping.
The utility model provides a kind of efficient oxygen-enriched combustion boiler tail flue gas energy utilization and processing system, and this is
The air separator system of oxygen-enriched combustion boiler is coupled by system with flue gas recirculation system and tail flue gas energy-recuperation system,
Boiler back end ductwork is divided into three parallel flues, adjusts flue gas recycled amount and temperature, improves adaptability of the system to coal；
Pass through low-pressure coal saver Mist heat recovering；Adjust air preheater outlet oxygen temperature；Three parallel flues intercouple, and increase cigarette
The regulation nargin of temperature degree.Using high-temperature flue gas with the mixed recycling high-temperature flue gas of recycling low-temperature flue gas as once
Wind, recycling low-temperature flue gas is heated using high-temperature flue gas, the recycling low-temperature flue gas of extraction needs not move through air preheater progress
Preheating, air preheater volume is reduced, reduce cost, improve economy；Avoid the occurrence of that a wind-warm syndrome is relatively low to cause flue gas simultaneously
The vapor liquefaction of recycling accumulation blocks the phenomenon of pulverized coal channel；Avoid the low-temperature corrosion in subsequent thermal face.Cigarette after dedusting
Gas removes the recycling low-temperature flue gas extracted, successively by primary dehydrating unit and deep dehumidification apparatus, and and oxygen-enriched combusting
Boiler air piece-rate system couple, using isolated liquid oxygen vaporescence absorb fume afterheat, make Water vapor condensation so as to
Reach the purpose of depth drying；Meanwhile vaporization of liquid oxygen is set to obtain gaseous state combustion-supporting gas using the heat in flue gas, it is not necessary to set special
The vaporization of liquid oxygen device of door, the complexity of oxygen-enriched combustion boiler system is reduced, reduce station-service electricity, improve power plant efficiency.Dehumidifying
Flue gas afterwards is after desulfuring and denitrifying apparatus, by waste heat recovery device, with oxygen-enriched combustion boiler air-seperation system coupling
Close, using the cold energy of isolated low temperature nitrogen, fully absorb the heat in flue gas so that flue-gas temperature further reduces, and subtracts
Few CO2Energy consumption during compressing and liquefying, further improve total energy approach rate.
The utility model provides a kind of efficient oxygen-enriched combustion boiler tail flue gas energy utilization and processing system, and this is
Unite the air separator system of oxygen-enriched combustion boiler and flue gas recirculation system and tail flue gas energy regenerating processing system phase
Coupling, boiler back end ductwork is divided into three parallel flues, adjusts flue gas recycled amount and temperature, the system of raising is fitted to coal
Ying Xing；Pass through low-pressure coal saver Mist heat recovering；Adjust air preheater outlet oxygen temperature；Three parallel flues intercouple,
Increase the regulation nargin of flue-gas temperature.Using high-temperature flue gas with the mixed flue gas recycled of recycling low-temperature flue gas as once
Wind, the phenomenon that the relatively low vapor for causing flue gas recirculation the to accumulate liquefaction of a wind-warm syndrome blocks pulverized coal channel is avoided the occurrence of, is reduced
Air preheater volume, it is cost-effective, improve economy.
Flue gas after dedusting removes the recycling low-temperature flue gas extracted, successively by primary dehydrating unit and depth dehumidifying dress
Put, be easy to the recovery of follow-up flue gas, avoid low-temperature corrosion；And by energy regenerating processing system and oxygen-enriched combustion boiler air point
Coupled from system, make full use of the cold energy of isolated liquid oxygen, absorbed fume afterheat, Water vapor condensation is reached depth drying
Purpose；The complexity of oxygen-enriched combustion system is reduced simultaneously, without setting vaporization of liquid oxygen device, is reduced energy consumption, is improved energy utilization
Rate.Cool water heating is hot water by primary dehydrating unit, and the hot water can be used for the domestic water of near power station resident.
Flue gas after dehumidifying is empty with oxygen-enriched combustion boiler by waste heat recovery device after desulfuring and denitrifying apparatus
Gas separating system couples, and using the cold energy of isolated low temperature nitrogen, the heat in further recovered flue gas, enters flue-gas temperature
One step reduces, and obtains low-temperature flue gas, reduces CO2Energy consumption during compressing and liquefying, compressor power consumption reduce, and improve energy profit
Use efficiency；Meanwhile by the flue gas waste heat recovery of boiler tail and energy processing system and oxygen-enriched combustion boiler air-seperation system
Coupling, the cold energy of liquid oxygen and low temperature nitrogen is made full use of, Mist heat recovering, smoke processing system energy consumption is reduced, realizes the energy
Reasonable utilization.
Described above, above example is only to illustrate the technical solution of the utility model, rather than its limitations；Although ginseng
The utility model is described in detail according to previous embodiment, it will be understood by those within the art that：It is still
Technical scheme described in foregoing embodiments can be modified, or which part technical characteristic is equally replaced
Change；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the utility model technical scheme
Spirit and scope.
Claims (9)
1. a kind of efficient oxygen-enriched combustion boiler tail flue gas energy utilization and processing system, it is characterised in that including boiler sheet
Body (1), burner (2), economizer (3), back-end ductwork are divided into three parallel flues, the respectively first parallel flue (4), second
Parallel flue (5) flue (6) parallel with the 3rd, steam air heater (9), deduster (10), recirculation blower (11), pressure fan (12),
Primary dehydrating unit (13), deep dehumidification apparatus (14), pressure fan (15), desulfuring and denitrifying apparatus (16), waste-heat recovery device
(17), compressor (18), air separator (19)；
Boiler body (1) inwall is provided with the burner (2), and the burner (2) is connected with the pressure fan (12),
The economizer (3) is provided with boiler body (1) back-end ductwork, described first is provided with below the economizer (3)
Parallel flue (4), the second parallel flue (5) flue (6) parallel with the 3rd；
Arrangement low-pressure coal saver (7) in the second parallel flue (5), the middle arrangement air preheat of the 3rd parallel flue (6)
Device (8).
2. a kind of efficient oxygen-enriched combustion boiler tail flue gas energy utilization according to claim 1 and processing system, its
It is characterised by：
The first parallel flue (4) is connected with the recirculation blower (11), the arrangement low-pressure coal saver (7), the sky
Air preheater (8) is connected with the steam air heater (9), and the steam air heater (9) is connected with the deduster (10).
3. a kind of efficient oxygen-enriched combustion boiler tail flue gas energy utilization according to claim 1 and processing system, its
It is characterised by：
The deduster (10), the recirculation blower (11) and the primary dehydrating unit (13), the deep dehumidification apparatus
(14), the desulfuring and denitrifying apparatus (16) is sequentially connected；
The steam air heater (9) is connected with the deep dehumidification apparatus (14), the deep dehumidification apparatus (14) and the air point
Connected from device (19), the air separator (19), the desulfuring and denitrifying apparatus (16) and the waste-heat recovery device (17) connect
Connect, the waste-heat recovery device (17) is connected with the compressor (18).
4. a kind of efficient oxygen-enriched combustion boiler tail flue gas energy utilization according to claim 1 and processing system, its
It is characterised by：Boiler back end ductwork is divided into three parallel flues, the respectively first parallel flue (4), the second parallel flue (5) and
3rd parallel flue (6), it is vacant in the first parallel flue (4), high-temperature flue gas and recycling low-temperature flue gas are mixed, raising follows again
Ring flue-gas temperature, flue gas recycled needs not move through air preheater heating, therefore air preheater need to only be used for preheated oxygen, subtract
Few air preheater volume, it is cost-effective, improve economy；Flue gas recycled temperature is adjusted by corresponding gas baffle, carried
Adaptability of the high system to coal；Mixed flue gas recycled carries coal dust by pressure fan (12) and is sent into boiler furnace；The
Arrangement low-pressure coal saver (7), Mist heat recovering heating boiler feed water in two parallel flues (5)；Cloth in 3rd parallel flue (6)
Air preheater (8) is empty, oxygen is heated using fume afterheat, exhaust gas volumn is adjusted by corresponding gas baffle, so as to adjust sky
Air preheater exports the temperature of oxygen；Three parallel flues are mutually coupled, and increase the regulation nargin of flue-gas temperature.
5. a kind of efficient oxygen-enriched combustion boiler tail flue gas energy utilization according to claim 1 and processing system, its
It is characterised by：The flue gas of discharge enters steam air heater (9) from the second parallel flue (5) flue (6) parallel with the 3rd, utilizes flue gas
Waste-heat oxygen.
6. a kind of efficient oxygen-enriched combustion boiler tail flue gas energy utilization according to claim 1 and processing system, its
It is characterised by：Dedusting is carried out by deduster (10) by the flue gas of steam air heater (9), extracts the low-temperature flue gas after a part of dedusting
It is sent into by recirculation blower (11) in the first parallel flue (4) and is mixed for flue gas recirculation with high-temperature flue gas；Pass through first
The corresponding gas baffle regulation flue gas recycled temperature of parallel flue (4), improves adaptability of the system to coal；Remaining flue gas according to
It is secondary to enter primary dehydrating unit (13) and deep dehumidification apparatus (14).
7. a kind of efficient oxygen-enriched combustion boiler tail flue gas energy utilization according to claim 1 and processing system, its
It is characterised by：Primary dehydrating unit (13) makes the water vapor condensation in flue gas using cold water absorption fume afterheat, is removed so as to reach
The purpose of wet drying, the domestic water that the hot water after fume afterheat can be used near power station resident is absorbed, improves energy utilization effect
Rate, save the energy.
8. a kind of efficient oxygen-enriched combustion boiler tail flue gas energy utilization according to claim 1 and processing system, its
It is characterised by：Deep dehumidification apparatus (14) makes full use of the cold energy for the liquid oxygen that air separator isolates, and vaporization of liquid oxygen heat absorption removes
Wet, the oxygen after vaporization is sent into burner after being sequentially sent to steam air heater (9) and air preheater (8) preheating by air-introduced machine (15)
(2)；On the one hand it can make full use of the cold energy of liquid oxygen that flue gas is further dried, facilitate the recovery of follow-up flue gas；On the other hand, no
Special vaporization of liquid oxygen device must be used to obtain gaseous state oxygen, reduce station-service electricity, improve generating efficiency.
9. a kind of efficient oxygen-enriched combustion boiler tail flue gas energy utilization according to claim 1 and processing system, its
It is characterised by：Dehumidified by dedusting and the flue gas after the waste heat that is fully utilized is liquefied as liquid CO by compressor (18)2Seal up for safekeeping.
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| CN106369595A (en) * | 2016-11-29 | 2017-02-01 | 广东电网有限责任公司电力科学研究院 | High-efficiency tail flue gas energy utilization and treatment system of oxygen-enriched combustion boiler |
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| CN108870368A (en) * | 2018-05-11 | 2018-11-23 | 武汉理工大学 | A kind of oxygen-enriched combustion system and method based on new chemical chain oxygen |
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| CN108019928A (en) * | 2017-11-29 | 2018-05-11 | 北京科技大学 | A kind of oxygen-enriched combusting dual chamber steam generator system |
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| CN111760415A (en) * | 2020-07-07 | 2020-10-13 | 南京工业大学 | Fabricated building construction carbon emission treatment system |
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