CN105605555B - A kind of steam generator system and its control method for being adapted to strong contamination solid fuel ignition - Google Patents
A kind of steam generator system and its control method for being adapted to strong contamination solid fuel ignition Download PDFInfo
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- CN105605555B CN105605555B CN201610115994.0A CN201610115994A CN105605555B CN 105605555 B CN105605555 B CN 105605555B CN 201610115994 A CN201610115994 A CN 201610115994A CN 105605555 B CN105605555 B CN 105605555B
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- flue gas
- gas recycled
- solid fuel
- burner hearth
- steam generator
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
- F23B60/00—Combustion apparatus in which the fuel burns essentially without moving
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J9/00—Preventing premature solidification of molten combustion residues
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K1/00—Preparation of lump or pulverulent fuel in readiness for delivery to combustion apparatus
- F23K1/04—Heating fuel prior to delivery to combustion apparatus
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Air Supply (AREA)
Abstract
The invention provides a kind of steam generator system for being adapted to strong contamination solid fuel ignition, roof of the furnace is provided with roof of the furnace heating surface, and air preheater connection pulverized coal preparation system and burner, pulverized coal preparation system also connect burner；A part for heated surface at the end of boiler is arranged to twin flue heating surface area, and the downstream of twin flue heating surface is provided with gas baffle；Flue gas recirculation system includes the high and low temperature flue gas recycled pipeline drawn respectively from air preheater entrance, exit, and high and low temperature flue gas recycled pipeline connects burner hearth respectively by two-way pipeline again after merging.Present invention also offers the control method of the steam generator system of above-mentioned suitable strong contamination solid fuel ignition.The invention can ensure that under different burner hearth contaminations main steam temperature realization, the contamination of furnace heating surface has also mitigated simultaneously, so as to which the increase of the improvement to boiler service condition when using strong contamination solid fuel, and continuous operating time all has the improvement effect of highly significant.
Description
Technical field
The present invention relates to a kind of steam generator system, more particularly to a kind of steam generator system for being adapted to strong contamination solid fuel ignition
And its control method.
Background technology
A large amount of still undeveloped Coal Energy Sources are contained in Xinjiang.Predict that total resources up to 219,000,000,000,000 tons, accounts for Chinese forecasting coal
The 40% of charcoal total resources.Xinjiang just turns into the focus of national energy circle at present due to containing so abundant coal resources.
A collection of old Energy Base at China east, middle part shows resource exhaustion trend and the continuous growth pattern of national energy demand
Under, Xinjiang Coal will turn into Chinese highly important energy splice zone and strategic energy reserves area.
In major coalfield in Xinjiang, (In The Eastern Junggar Basin is from Fukang City to Morikazak Autonomous County in accurate eastern coalfield
A strip, thing is about 220 kilometers) prognostic reserves up to 390,000,000,000 tons, be China self-contained coalfield maximum at present.With
Present coal in China annual production calculates, and an eastern coalfield of standard national can just use 100 years.At present, accurate eastern coalfield is China
" Xin electricity Dong is sent ", " West-east Gas, " new coal east fortune " most important energy safeguard base, and Xinjiang coal electricity coal chemical industry are main
Coal supply source.
Historical genesis and local different natural conditions due to accurate eastern colliery, the ature of coal of this area is also along colliery point
Strap and change.On the whole, the ature of coal of this area has that higher moisture, medium calorific capacity, ature of coal bulk density be small, Yi Zhe
The features such as fire, easy to burn out, strong coking, high basic metal content, strong contamination.The other power coals being had found compared to the country, it is accurate
Eastern coal has high alkali metal oxide.For example, alkali metal oxide Na2O content is overall all more than 2%, during highest
Up to 10%.And Na2Contents of the O in other steam coals is no more than 1%.
Current research shows, higher alkali metal content in coal (including Na2O and K2O it is) to cause coal ash that there is strong stain
The main factor of property.Substantial amounts of practical operating experiences also indicate that power plant mixes the accurate eastern coal of burning and causes boiler large-area coking, is stained with
Dirt, with accurate eastern coal high CaO, Na2O、K2O content is that have important contact.Due to accurate eastern ature of coal high-moisture, high coking capacity, tight
The characteristics of weight contamination is very big, the quasi- regional power plant in east in part substantially stopped the experiment mixed and burn accurate eastern coal, while they are to coal
Alkali-Metal Na, K content, which have, inside matter quite clearly requires.Which limits accurate eastern coal in a large amount of uses of power plant, gives
The application of accurate eastern coal brings very big problem.
Therefore, mix burning even 100% in order to large scale and use accurate eastern coal, ensure safe, economical after boiler operation
Run with environmental protection, present applicant proposes a kind of steam generator system and its control method for using strong contamination solid fuel.With tradition
Steam generator system compare, system involved by the present invention has good heating surface heat transfer regulating power, more conforms to use strong contamination
Property solid fuel when boiler operatiopn requirement, there is highly significant to improving boiler operatiopn condition, prolonged boiler run time
Effect.
The content of the invention
The technical problem to be solved in the present invention is when using strong contamination solid fuel, how to mitigate boiler heating surface
Inclination to soiling, prolonged boiler run time, make it have more preferable flexibility and economy.
In order to solve the above-mentioned technical problem, the technical scheme is that providing a kind of suitable strong contamination solid fuel combustion
The steam generator system of burning, including boiler body, pulverized coal preparation system, air preheater and flue gas recirculation system, it is characterised in that：
Boiler body includes burner hearth, and roof of the furnace is provided with roof of the furnace heating surface, air preheater connection pulverized coal preparation system and
Burner, pulverized coal preparation system also connect burner；
Flue gas recirculation system includes the high temperature flue gas recycled pipeline drawn respectively from air preheater entrance, exit
With low temperature flue gas recycled pipeline, high temperature flue gas recycled pipeline and low temperature flue gas recycled pipeline merge after again by two-way again
Circulating flue gas intake connects burner hearth respectively.
Preferably, a part for heated surface at the end of boiler is arranged to twin flue heating surface area, in twin flue heating surface area
Smoke outlet is provided with gas baffle；Two passages in the twin flue heating surface area are separated by water cooling or air cooling dividing wall.
Preferably, high temperature recycling is respectively equipped with high temperature flue gas recycled pipeline and low temperature the flue gas recycled pipeline
Smoke regulating valve and low temperature flue gas recycled regulating valve.
Preferably, the pipeline after high temperature flue gas recycled pipeline and low temperature the flue gas recycled pipeline merges is provided with again
Circulating fan.
Preferably, the burner bottom is located at all the way in the two-way flue gas recycled intake, another way is located at
The bottom of the roof of the furnace heating surface.
Preferably, the position all the way in the two-way flue gas recycled intake is to be sprayed apart from the burner orlop
Below mouth horizontal level within 3m.
Preferably, the position of the another way in the two-way flue gas recycled intake is under the roof of the furnace heating surface
Within the 3m of end lower section.
Present invention also offers it is a kind of it is above-mentioned be adapted to strong contamination solid fuel ignition steam generator system control method, its
It is characterised by：For air after air preheater heats, a part enters pulverized coal preparation system together with solid fuel, then passes through burning
Device enters burner hearth, and another part directly enters burner hearth by burner；Flue gas caused by stove chamber inner combustion is heated through boiler tail
Behind face and air preheater heat exchange downstream is discharged to as smoke evacuation；
High temperature flue gas recycled is drawn from air preheater porch, and low temperature flue gas recycled is from air preheater exit
Draw, two strands of flue gas recycleds are merged into one and enter recirculation blower, and divide A, B two-way to introduce burner hearth；Flue gas recycled draws
Entrance A is located at the burner bottom, and flue gas recycled intake B is located at the bottom of the roof of the furnace heating surface；
When burner hearth stains lesser extent, by increasing the flue gas recycled amount at flue gas recycled intake A, and pass through
High temperature flue gas recycled regulating valve and low temperature flue gas recycled regulating valve are adjusted to keep the flue gas recycled temperature into burner hearth
More than 300 DEG C；
When burner hearth contamination degree is more serious, by increasing the flue gas recycled amount at flue gas recycled intake B, and lead to
High temperature flue gas recycled regulating valve and low temperature flue gas recycled regulating valve are overregulated to keep the flue gas recycled temperature into burner hearth
Degree is below 250 DEG C.
Preferably, the temperature for the high temperature flue gas recycled drawn from air preheater porch is 200~450 DEG C, from sky
The temperature for the low temperature flue gas recycled that air preheater exit is drawn is 80~200 DEG C；High temperature, low temperature flue gas recycled are from boiler
The temperature difference that body is drawn is in the range of 100~300 DEG C.
Preferably, when adjusting flue gas recycled, ensured by adjusting the gas baffle in twin flue heating surface area downstream
The stabilization of main steam temperature, if steam generator system has reheated steam flow, ensure main steam temperature by adjusting gas baffle
The matching of degree and reheat steam temperature.
Steam generator system provided by the invention, by adjusting the flue gas recycled amount at diverse location, it can directly change pot
The caloric receptivity of stove burner hearth, so as to be issued to the purpose of required steam quality in different burner hearth contaminations.
When burner hearth stains lesser extent, burner hearth caloric receptivity is larger, at this moment can be by increasing at flue gas recycled intake A
Flue gas recycled amount reduce the flue-gas temperature of burner region, stain speed so as to reduce furnace heating surface.In order to mitigate
Influence of the flue gas recycled to fuel combustion process, here the charging temperature of flue gas recycled need to be maintained at more than 300 DEG C.Flue gas
Temperature when flowing through roof of the furnace heating surface decreases, that is, also mitigates the contamination speed of roof of the furnace heating surface.Most
Whole flue gas temperature of hearth outlet declines, so as to ensure that the safe operation of afterbody high-temperature surface.
When burner hearth contamination degree is more serious, burner hearth caloric receptivity is smaller, at this moment increases at flue gas recycled intake B again
Amount of circulating gas, the radiant heat absorption for making lower furnace increased.In order to reach reduce roof of the furnace heating surface and its under
Swim contaminations degree simultaneously influence of the reduction flue gas recycled amount to boiler heating surface as far as possible of heating surface, here flue gas recycled
Charging temperature need to be kept low as much as possible, should not exceed 250 DEG C.High-temperature flue gas before roof of the furnace heating surface with temperature
Spend relatively low flue gas recycled mixing, temperature has and reduced to a certain degree, alleviates the contamination speed of roof of the furnace heating surface.Finally
Flue gas temperature of hearth outlet declines, and equally ensure that the safe operation of afterbody high-temperature surface.
When adjusting the flue gas recycled amount of two flue gas recirculation intakes of A, B, adjustment twin flue heating surface need to be coordinated
The aperture of area's gas baffle ensures the matching of the realization of the temperature of main steam or main steam temperature and reheat steam temperature.
Steam generator system provided by the invention and its control method can be by control measure that are simple, having operability
The realization of main steam temperature under different burner hearth contaminations can be ensured, while the contamination of furnace heating surface has also mitigated,
So as to which the improvement to boiler service condition when using strong contamination solid fuel, and the increase of continuous operating time all have
The improvement effect of highly significant.
Brief description of the drawings
Fig. 1 is the steam generator system structural representation for the suitable strong contamination solid fuel ignition that the present embodiment provides.
Embodiment
With reference to specific embodiment, the present invention is expanded on further.It should be understood that these embodiments are merely to illustrate the present invention
Rather than limitation the scope of the present invention.In addition, it is to be understood that after the content of the invention lectured has been read, people in the art
Member can make various changes or modifications to the present invention, and these equivalent form of values equally fall within the application appended claims and limited
Scope.
Fig. 1 is the steam generator system structural representation for the suitable strong contamination solid fuel ignition that the present embodiment provides, described
The steam generator system of suitable strong contamination solid fuel ignition include boiler body, pulverized coal preparation system 1, air preheater 7 and flue gas
Recirculating system.The top of burner hearth 3 sets curtain wall 4, and air is after the heating of air preheater 7, a part and solid fuel
Pulverized coal preparation system 1 is entered together, is then burnt by burner 2 into burner hearth 3, another part directly passes through burner 2
Into burner hearth 3；High-temperature flue gas is discharged to downstream after burner hearth 3 and the heat exchange of heated surface at the end of boiler and air preheater as smoke evacuation；
A part for heated surface at the end of boiler is arranged to twin flue heating surface area 5；Flue gas recycled is at high temperature ZB points at ZA and low temperature
Not Yin Chu after connect respective regulating valve 9,10, this two strands of flue gases are merged into one and enter recirculation blower 8, and divide two-way to enter
Burner hearth 3.
High temperature flue gas recycled is drawn from the front end of air preheater 7, and the flue-gas temperature of extraction is 380 DEG C；Low temperature temperature is followed again
Ring flue gas is drawn from the rear end of air preheater 7, and the flue-gas temperature of extraction is 130 DEG C；Flue gas recycled adds by recirculation blower 8
After pressure, flue gas recycled intake A is being close to burner hearth top in the bottom of burner 2, another way flue gas recycled intake B all the way
The bottom of portion's curtain wall 4.
The heating surface in described twin flue heating surface area 5 is arranged in two passages, and by superheater dividing wall (water cooling or
Air cooling) separate, the place for being close to twin flue heating surface downstream sets gas baffle 6.
Described flue gas recycled intake A position is at 2m below the orlop spout horizontal level of burner 2.
Described flue gas recycled intake B position is at the 2m of the lower end of burner hearth curtain wall 4 lower section.
, can be by increasing the flue gas recycled amount at flue gas recycled intake A when burner hearth stains lesser extent, and lead to
High temperature flue gas recycled regulating valve 9 and low temperature flue gas recycled regulating valve 10 are overregulated to keep the recycling cigarette into burner hearth 3
Temperature degree is more than 350 DEG C；, can be by increasing following again at flue gas recycled intake B when burner hearth contamination degree is more serious
Ring exhaust gas volumn, and by adjusting high temperature flue gas recycled regulating valve 9 and low temperature flue gas recycled regulating valve 10 to keep entering stove
The flue gas recycled temperature of thorax 3 is at 120 DEG C；When adjusting flue gas recycled by adjusting the gas baffle in twin flue heating surface area
6 ensure the stabilization of main steam temperature.
By adjusting the flue gas recycled amount at diverse location, it can directly change the caloric receptivity of boiler furnace, so that
Different burner hearth contaminations are issued to the purpose of required steam quality.When burner hearth stain lesser extent when, burner hearth caloric receptivity compared with
Greatly, at this moment the flue-gas temperature of burner region can be reduced by increasing the flue gas recycled amount at flue gas recycled intake A,
Speed is stain so as to reduce furnace heating surface.Meanwhile temperature of the flue gas when flowing through roof of the furnace curtain wall has dropped
It is low, that is, also mitigate the contamination speed of curtain wall.Final flue gas temperature of hearth outlet declines, so as to ensure that afterbody high temperature
The safe operation of heating surface.
When burner hearth contamination degree is more serious, burner hearth caloric receptivity is smaller, at this moment increases at flue gas recycled intake B again
Amount of circulating gas, the radiant heat absorption for making lower furnace increased.Meanwhile high-temperature flue gas is in roof of the furnace curtain wall
The preceding flue gas recycled relatively low with temperature mixes, and temperature has and reduced to a certain degree, alleviates the contamination speed of curtain wall.Most
Whole flue gas temperature of hearth outlet declines, and equally ensure that the safe operation of afterbody high-temperature surface.
In general, above-mentioned steam generator system and its control method can pass through control measure that are simple, having operability
Reaching for main steam temperature under different burner hearth contaminations can be ensured, while the contamination of furnace heating surface has also subtracted
Gently, so as to improvement to boiler service condition when using strong contamination solid fuel, and continuous operating time increase all
Improvement effect with highly significant.
Claims (9)
1. a kind of steam generator system for being adapted to strong contamination solid fuel ignition, including boiler body, pulverized coal preparation system (1), air are pre-
Hot device (7) and flue gas recirculation system, it is characterised in that：
Boiler body includes burner hearth (3), and roof of the furnace heating surface is provided with the top of burner hearth (3), and air preheater (7) connects powder system processed
System (1) and burner (2), pulverized coal preparation system (1) also connect burner (2)；
Flue gas recirculation system includes the high temperature flue gas recycled pipeline drawn respectively from air preheater (7) entrance, exit
With low temperature flue gas recycled pipeline, high temperature flue gas recycled pipeline and low temperature flue gas recycled pipeline merge after again by two-way again
Circulating flue gas intake connects burner hearth (3) respectively；
The burner (2) bottom is located at all the way in the two-way flue gas recycled intake, and another way is located at the burner hearth
The bottom of top heating surface.
A kind of 2. steam generator system for being adapted to strong contamination solid fuel ignition as claimed in claim 1, it is characterised in that：It is described
A part for heated surface at the end of boiler is arranged to twin flue heating surface area (5), the smoke outlet in twin flue heating surface area (5)
Provided with gas baffle (6)；Two passages in twin flue heating surface area (5) are separated by water cooling or air cooling dividing wall.
A kind of 3. steam generator system for being adapted to strong contamination solid fuel ignition as claimed in claim 1, it is characterised in that：It is described
High temperature flue gas recycled regulating valve (9) and low temperature are respectively equipped with high temperature flue gas recycled pipeline and low temperature flue gas recycled pipeline
Flue gas recycled regulating valve (10).
A kind of 4. steam generator system for being adapted to strong contamination solid fuel ignition as described in claim 1 or 3, it is characterised in that：
Pipeline after high temperature flue gas recycled pipeline and low temperature the flue gas recycled pipeline merges is provided with recirculation blower (8).
A kind of 5. steam generator system for being adapted to strong contamination solid fuel ignition as claimed in claim 1, it is characterised in that：It is described
Position all the way in two-way flue gas recycled intake is apart from 3m below the burner (2) orlop spout horizontal level
Within.
A kind of 6. steam generator system for being adapted to strong contamination solid fuel ignition as described in claim 1 or 5, it is characterised in that：
The position of another way in the two-way flue gas recycled intake is within the 3m of roof of the furnace heating surface lower end lower section.
A kind of 7. control of the steam generator system of suitable strong contamination solid fuel ignition as described in any one of claim 1~6
Method, it is characterised in that：For air after air preheater (7) heating, a part enters pulverized coal preparation system together with solid fuel
(1) burner hearth (3) then, is entered by burner (2), another part directly enters burner hearth (3) by burner (2)；Burner hearth (3)
Flue gas caused by interior burning is discharged to downstream after heated surface at the end of boiler and air preheater (7) heat exchange as smoke evacuation；
High temperature flue gas recycled is drawn from air preheater (7) porch, and low temperature flue gas recycled exports from air preheater (7)
Place is drawn, and two strands of flue gas recycleds are merged into one and enter recirculation blower (8), and divides A, B two-way to introduce burner hearth；Recycle cigarette
Gas intake A is located at the burner (2) bottom, and flue gas recycled intake B is located at the bottom of the roof of the furnace heating surface；
When burner hearth (3) stains lesser extent, by increasing the flue gas recycled amount at flue gas recycled intake A, and pass through
Regulation high temperature flue gas recycled regulating valve (9) and low temperature flue gas recycled regulating valve (10) enter following again for burner hearth (3) with holding
Ring flue-gas temperature is more than 300 DEG C；
When burner hearth (3) contamination degree is more serious, by increasing the flue gas recycled amount at flue gas recycled intake B, and lead to
High temperature flue gas recycled regulating valve (9) and low temperature flue gas recycled regulating valve (10) are overregulated to keep entering burner hearth (3) again
Circulating flue gas temperature is below 250 DEG C.
A kind of 8. steam generator system for being adapted to strong contamination solid fuel ignition as claimed in claim 7, it is characterised in that：From sky
The temperature for the high temperature flue gas recycled that air preheater (7) porch is drawn is 200~450 DEG C, from air preheater (7) exit
The temperature of the low temperature flue gas recycled of extraction is 80~200 DEG C；The temperature that high temperature, low temperature flue gas recycled are drawn from boiler body
Difference in the range of 100~300 DEG C.
A kind of 9. steam generator system for being adapted to strong contamination solid fuel ignition as claimed in claim 7, it is characterised in that：Adjusting
During whole flue gas recycled, ensure the steady of main steam temperature by adjusting the gas baffle (6) in twin flue heating surface area (5) downstream
It is fixed, if steam generator system has reheated steam flow, ensure main steam temperature and reheated steam by adjusting gas baffle (6)
The matching of temperature.
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| CN201610115994.0A CN105605555B (en) | 2016-03-01 | 2016-03-01 | A kind of steam generator system and its control method for being adapted to strong contamination solid fuel ignition |
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| CN201610115994.0A CN105605555B (en) | 2016-03-01 | 2016-03-01 | A kind of steam generator system and its control method for being adapted to strong contamination solid fuel ignition |
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| CN105605555B true CN105605555B (en) | 2017-11-21 |
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| CN106322416B (en) * | 2016-08-17 | 2018-08-28 | 中国华能集团清洁能源技术研究院有限公司 | A kind of π moulded coals powder boiler back end ductwork NOxWith CO catalytic eliminating devices |
| CN106247375A (en) * | 2016-08-30 | 2016-12-21 | 江苏太湖锅炉股份有限公司 | Single drum longitudinal biomass direct-fired chain-grate boiler system |
| CN106322367A (en) * | 2016-08-31 | 2017-01-11 | 华中科技大学 | Boiler system capable of combining oxygen-enriched air and air combustion |
| CN109028040B (en) * | 2018-06-15 | 2019-12-27 | 上海锅炉厂有限公司 | Liquid-solid slag-discharging coupled boiler suitable for burning strong-slagging dirt-staining solid fuel |
| CN111006202A (en) * | 2018-10-08 | 2020-04-14 | 上海锅炉厂有限公司 | Cyclone combustion coupling boiler system suitable for burning strong-slagging dirt-staining solid fuel |
| CN110410771B (en) * | 2019-09-03 | 2024-04-26 | 上海锅炉厂有限公司 | Flue gas recirculation system |
| CN111947138A (en) * | 2020-08-15 | 2020-11-17 | 西安交通大学 | Gas combustion system and method with wide combustion heat value applicability |
| CN114659099A (en) * | 2022-04-20 | 2022-06-24 | 西安热工研究院有限公司 | Flue gas circulation system for improving combustion characteristics and thermal characteristics of pulverized coal fired boiler |
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| CN101893370A (en) * | 2010-07-07 | 2010-11-24 | 华北电力大学（保定） | System adopting high concentration CO2 flue gas as coal dust drying medium in boiler |
| CN102494334A (en) * | 2011-12-22 | 2012-06-13 | 上海锅炉厂有限公司 | Coal powder combustion system used in high-moisture type coal oxygen-enriched combustion |
| CN104197343A (en) * | 2014-08-29 | 2014-12-10 | 华北电力大学 | Oxygen-enriched combustion recycle flue gas catalytic desulfurization system and method |
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