Upload
anonymous-g8sdgt
View
220
Download
0
Embed Size (px)
Citation preview
8/18/2019 Day 2 Session 5 - Jianxiong Mao CFB Boilers in China.pdf
1/27
CFB Boilers in ChinaCFB Boilers in China
JianxiongJianxiong MaoMao
Department of Thermal EngineeringDepartment of Thermal Engineering
Tsinghua University, Beijing, ChinaTsinghua University, Beijing, China
CLEANER COAL WORKSHOP AUGUST 19-21, 2008
HA LONG CITY, VIETNEM
8/18/2019 Day 2 Session 5 - Jianxiong Mao CFB Boilers in China.pdf
2/27
Advantages of CFB combustion Boiler Advantages of CFB combustion Boiler
• Clean coal combustion – Lower NO
X
emission
– Lower cost desulphurization during combustion
• Fuel flexibility
– Low grade coals, low volatile fuels: anthracite andpetroleum coke, coal mine mouth and coalwashery wastes, Biomass, municipal solid waste
• Lower Load rate• Ash can be used for cement
• Stability of operation
8/18/2019 Day 2 Session 5 - Jianxiong Mao CFB Boilers in China.pdf
3/27
Status of CFB Boilers in ChinaStatus of CFB Boilers in China
• Total number of CFB boilers in operationby the end of 2007 was 2637 units with
total installed capacity of about40,000MWe;
• Among the total 40,000MWe CFB boilers,
unit capacity between 100-200MWe wasover 100 units and unit capacity of300MWe was 8 units in operation;
• China has been the country with thelargest number and capacity of CFB
boilers in the world.
8/18/2019 Day 2 Session 5 - Jianxiong Mao CFB Boilers in China.pdf
4/27
Statistics of CFB Boilers in ChinaStatistics of CFB Boilers in China(20072007)
Capacity
t/h (MWe)
Number of Units of Total
(ordered, under construction
and in operation)
Number of units in
operation
25-50 1024 886
65-90 (25MWe) 1340 1159
100-130 (50MWe) 218 188
130-180 (75MWe) 86 69
200-280 (90MWe) 214 184
310-410 (100MWe) 55 46420-485 (135MWe) 184 96
500-700 (200MWe) 6 1
1000 (300MWe) 31 8
Total 3158 2637
8/18/2019 Day 2 Session 5 - Jianxiong Mao CFB Boilers in China.pdf
5/27
First 300MWe Anthracite CFB in BaimaFirst 300MWe Anthracite CFB in Baima
Power Plant in Sichuan ProvincePower Plant in Sichuan Province· Coal with volatile matter
content less than 10% is
defined as Anthracite;· Anthracite is diff icult to ignite,
stable and completecombustion by PC boiler, but
is a good fuel for CFB boilers;
· China is rich in anthracitereverse and production, it isused as steam coal for powergeneration. CFB is a excellentsolution for efficientanthracite combustion.
8/18/2019 Day 2 Session 5 - Jianxiong Mao CFB Boilers in China.pdf
6/27
Big Potential for Coal Mine andBig Potential for Coal Mine and
CoalCoal WasheryWashery Wastes Fired CFBWastes Fired CFB• Annual coal production in China has been
over 2500 mill ion tons in 2007, large amountof coal mine and coal washery wastes can beconverted into electricity through CFB powergeneration;
• Only in Shanxi Province, which is the largestcoal producer in China, 5,000-6,000MWe CFBpower plants burning coal mine and coalwashery wastes will be built during 2006-2010,which will consume 30-40 million tons of coalmine and coal washery wastes .
8/18/2019 Day 2 Session 5 - Jianxiong Mao CFB Boilers in China.pdf
7/27
Coal Mine and CoalCoal Mine and Coal WasheryWashery
Wastes Fired CFB Power PlantsWastes Fired CFB Power Plants· CFB boilers used for
coal mine and coalwashery wastes firedCFB power plants inoperation include
50MWe, 135MWe,150MWe and 300MWe,
· The largest 2 300MWe
coal nine waste CFBplant wil l be in operationin August 2008 in ShanxiProvince.
8/18/2019 Day 2 Session 5 - Jianxiong Mao CFB Boilers in China.pdf
8/27
44 150MWe Reheat CFB Burning Waste Anthracite150MWe Reheat CFB Burning Waste Anthracite
CamphaCampha
Thermal Power Plant in VietnamThermal Power Plant in Vietnam
Campha is the Largestongoing CFB Power Plant in
Vietnam· Location: Campha, Vietnam
· EPC Contractor : Harbin Power
Engineering (HPE) , China· Subcontractor to HPE Providing
Engineering Package and SiteService: Foster Wheeler
· Start-Up Year : 2009/2010· Capacity: 4 150MWe in 2 phases
· Fuel: 80% Waste anthracite and
20% anthracite washery slurry
8/18/2019 Day 2 Session 5 - Jianxiong Mao CFB Boilers in China.pdf
9/27
CamphaCampha Thermal Power Plant Under ConstructionThermal Power Plant Under Construction
8/18/2019 Day 2 Session 5 - Jianxiong Mao CFB Boilers in China.pdf
10/27
500 tons/day municipal solid waste (MSW)CFB
Power Plant Developed by Tsinghua University
8/18/2019 Day 2 Session 5 - Jianxiong Mao CFB Boilers in China.pdf
11/27
The Sources of CFB Boiler Technology in ChinaThe Sources of CFB Boiler Technology in China
• Local CFB Technologies developed by: – Tsinghua University
– Thermal Engineering Physics Institute
– Thermal Power Research Institute
• Imported Sub-critical CFB Technology from: – Foster Wheeler to:
• Dongfang Boiler Company:100MWe CFB• Wuxi Boiler Company:150-300MWe CFB
– EVT to:
• Harbin Boiler Company: 135MWe CFB
– CE to:• Shanghai Boiler Company: 135 MWe CFB
– Alstom to:
• Harbin/Dongfang/Shanghai Boiler companies: 300MWe CFB
• Redevelopment of imported CFB technologies
8/18/2019 Day 2 Session 5 - Jianxiong Mao CFB Boilers in China.pdf
12/27
200MWe CFB Boiler Jointly Developed by200MWe CFB Boiler Jointly Developed by
Tsinghua University and Harbin BoilerTsinghua University and Harbin Boiler Co.LtdCo.Ltd
8/18/2019 Day 2 Session 5 - Jianxiong Mao CFB Boilers in China.pdf
13/27
Concept Design of 300MWe CFB Boiler
Developed by Tsinghua UniversityFeatures of concept design
of 300MWe CFB boiler:·Suitable for burning Chinese coal(high ash and sulfur content and
low heating value);·Three(3) Cyclones without externalheat exchanger (EHE);
·Parallel back pass with damperreheat temperature control;
·Tubular air heater for less air
leakage.
8/18/2019 Day 2 Session 5 - Jianxiong Mao CFB Boilers in China.pdf
14/27
Introduced 200Introduced 200--300MWe CFB300MWe CFB
Technology from Foster Wheeler Technology from Foster Wheeler
FB190
8/18/2019 Day 2 Session 5 - Jianxiong Mao CFB Boilers in China.pdf
15/27
Introduced 200Introduced 200--300MWe CFB300MWe CFB
Technology fromTechnology from Alstom Alstom
8/18/2019 Day 2 Session 5 - Jianxiong Mao CFB Boilers in China.pdf
16/27
Why We Need Supercritical CFB ?Why We Need Supercritical CFB ?Performance Comparison Between Different Type of Thermal Power GPerformance Comparison Between Different Type of Thermal Power Generation Unitseneration Units
Types of units Sub-critical
2 600MWe
Supercritical
2 600MWe
Ultra-supercritical
2 1000MWe
Steam parameters 16.7MPa/
538/538oC
24.5MPa/
538/566oC
24.5MPa/
566/566oC
27.5MPa/
600/600oC
Heat rate of Steam
turbine(Kcal/kwh)
1877 1830 1780 1772
Net efficiency
(%
)
39 42.91 43.63 45.01
Coal consumption
(gce/kwh)
315 286 282 272.9
Reduction of coal
consumption
(gce/kwh)
Base 29 33 42
8/18/2019 Day 2 Session 5 - Jianxiong Mao CFB Boilers in China.pdf
17/27
600MWe Supercritical CFB in China600MWe Supercritical CFB in China
• Development program of 600MWe supercritical CFB
boiler in China is a sub-project of “ 863” Program (High
Technology Development Program in China funded byMOST ), which is jointly developed by Tsinghua and
Harbin Boiler Co. Ltd. Another two major boiler
companies- Dongfang and Shanghai are also to jointhis development.
• First 600MWe supercrit ical CFB util ity boiler burning
anthracite will be built at Baima Power Plant.Construction of this project will start by the end of
2008
8/18/2019 Day 2 Session 5 - Jianxiong Mao CFB Boilers in China.pdf
18/27
Development of 600MWe Supercritical CFB in ChinaDevelopment of 600MWe Supercritical CFB in China
• Concept design of 600MWe
supercritical CFB boiler has
been completed.• Considering low and even
heat flux and temperature in
CFB furnace, smooth tubecan be used instead of rifled
tube in furnace.
• A demonstration project of
600MWe supercritical CFB
power plant will be built in
2008 at Baima Power Plant.
8/18/2019 Day 2 Session 5 - Jianxiong Mao CFB Boilers in China.pdf
19/27
Arrangement of 600MWesupercritical CFB Arrangement of 600MWesupercritical CFB
Boiler ofBoiler of TsinghuaTsinghua’’ss DesignDesign
8/18/2019 Day 2 Session 5 - Jianxiong Mao CFB Boilers in China.pdf
20/27
Concept Design of 600MWe Supercritical CFB Boiler JointlyConcept Design of 600MWe Supercritical CFB Boiler Jointly
Developed by Tsinghua University and Harbin Boiler CompanyDeveloped by Tsinghua University and Harbin Boiler Company
• Design features:
• Pants leg furnace designbased on introduced
design from Alstom;• Combined ignit ion system
both under bed and abovebed;
• Vertical tube water wall;
• 6 cyclones with 6 externalheat exchangers (EHEs);
• Bottom ash drained fromboth two side walls
through rol ler type ashcooler;
• 4 regenerated air heaterswith 4 sectors
8/18/2019 Day 2 Session 5 - Jianxiong Mao CFB Boilers in China.pdf
21/27
Basic Design Performances ofBasic Design Performances of 600MWe600MWe
CFB Boiler Jointly Developed byCFB Boiler Jointly Developed by
Tsinghua University and Harbin Boiler CompanyTsinghua University and Harbin Boiler Company
1. BMCR = 1900t/h
2. SH steam pressure=25.4MPa3. SH steam temperature =571℃ 5℃
4. RH steam temperature = 569℃ 5℃
5. Boiler efficiency = 91.9%(LHV)6. Lowest boiler load without oil supply = 30%BMCR
7. SO2emissions < 400mg/Nm3
8. NOx emissions≤
200 mg/Nm3
9. Removed bottom ash temperature at the outlet of
ash cooler ≤150℃
8/18/2019 Day 2 Session 5 - Jianxiong Mao CFB Boilers in China.pdf
22/27
Roller Type Ash Cooler for 300/600 MWe
CFB Boilers Developed in China
8/18/2019 Day 2 Session 5 - Jianxiong Mao CFB Boilers in China.pdf
23/27
Roller Type Ash Cooler for
300/600 MWe CFB Boilers
8/18/2019 Day 2 Session 5 - Jianxiong Mao CFB Boilers in China.pdf
24/27
Concept Design of 600MWe Supercritical CFBConcept Design of 600MWe Supercritical CFB
Boiler Developed by Dong Fang Boiler CompanyBoiler Developed by Dong Fang Boiler Company
• Design features:• Pants leg furnace design based
on introduced design from Alstom;
• Coal feed through loop sealsystem;
• Combined ignition system bothunder bad and above bed;
• 6 cyclones with 6 external heatexchangers (EHEs);
• Bottom ash drained from bothtwo side walls through rollertype ash cooler;
• 4 regenerated air heaters with 4
sectors
8/18/2019 Day 2 Session 5 - Jianxiong Mao CFB Boilers in China.pdf
25/27
Concept Design of 600MWe Supercritical CFB Boiler Jointly DeveloConcept Design of 600MWe Supercrit ical CFB Boiler Jointly Developed byped by
Thermal Engineering Physics Institute and Shanghai Boiler CompThermal Engineering Physics Institute and Shanghai Boiler Companyany
• Design features:
• Single furnace design withoutpants leg;
• Vertical tube design withpartial ri fle tube ;
• Mass flow rate is 1400kg/m2
s• 6 cyclones with 6 external
heat exchangers (EHEs);
• Bottom ash drained from both
two side walls through rollertype ash cooler;
8/18/2019 Day 2 Session 5 - Jianxiong Mao CFB Boilers in China.pdf
26/27
ConclusionsConclusions
• CFB as a clean coal technology is very important forthe countries such as China where coal is the
dominant factor in energy structure;• China has been the country with the largest number
and capacity of CFB boilers;
• CFB has been a mature technology as utility boiler forpower generation with unique advantages vs PCboilers such as low emissions and fuel flexibility;
• CFB is specially suitable for burning anthracite, lowgrade coal, biomass and municipal solid waste forpower generation.
8/18/2019 Day 2 Session 5 - Jianxiong Mao CFB Boilers in China.pdf
27/27
Thank you