flue gas cleaning of coal-fired power plant and sec...
TRANSCRIPT
Shanghai Electric Power Generation Environment Protection Engineering Co., Ltd.
Flue Gas Cleaning of Coal-fired Power Plant and SEC Technology
Content
Introduction of SEC-PGEPE
• Environment Protection Island
• Introduction of DeNOx/FGD/Particle Control Technology
• DeNOx
• FGD
• Particle Control
2
3
2000 2005 2013
Foundation of Company
Company Name Changed
Company Share Changed
..Desulfurization.. ..Environment.. SEC-PGEPE
SO2
NOx
PM
0
200
400
600
800
1000
1200
1996 2003 2011 Ultra LowEmission
India newemission norms
from Ist Jan 2017
1200
400
10035 100
1000
450
10050 100
600
50
2010
30
Chinese Increasingly Stringent Environmental Requirements Vs India new emission norms from year Ist Jan 2017
SO2 NOx PM
PM
NOx
SO2
Background
4
Milestones of Typical Reference
1989 2000 2005 2006 2012 2015
Transferred FGD Tech
Transferred SCR Tech
Developed WESP Tech
Transferred Low-low Temp ESP Tech
Dust collector Da Gang Power Station,
Tian Jin
De-SOx Equipment(GGH)
ShanghaiWaigaoqiao 300MW
De-NOx Equipment (SCR、SNCR)
Songyu 350MW SCR (First Domestic SCR)
Advanced Low-NOxCombustion System
Low-low Temp ESP/NL-GGH
Environment Protection Island
Our technologies are authorized for global markets! 5
300
200
150150
130
16
160
117
22.5
5035
10
0
50
100
150
200
250
300
350
World Wide Emission Standard mg/Nm3
India Euro USA Average China
NOx SO2 PM
600
For India Unit≥500MW, SO2<200mg/Nm³; Unit<500MW, SO2 <600mg/Nm³
Background:
6
7
Main Business
Engineering
Procurement
Construction
■ Project Proposal
■ Project Detail Design
■ Project Basic Design
■ Equipment Design
■ Equipment Procurement
■ Manufacture Supervision
■ Manufacture Supervision
Service
■ Project Management
■ Construction Supervision
■ System Commissioning
■ Training and After Service
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26660
102644
14180
53
190
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0
20
40
60
80
100
120
140
160
180
200
0
20000
40000
60000
80000
100000
120000
FGD De-NOx Low-low Temp ESP
Un
its
Meg
a W
att
Accomplished Capacity and Units
Unit Capacity Unit Number
Statistics by the end of Jan. 2016
Content
• Introduction of SEC-PGEPE
Environment Protection Island
• Introduction of DeNOx/FGD/Particle Control Technology
• DeNOx
• FGD
• Particle Control
9
Environment Protection Island(EPI)
10
More
Environment
More
Efficiency
More
Economic
More Energy
Saving
EPI Project Example
NOx(mg/Nm3)
<20
~2000 <20 <20SOx(mg/Nm3)
Dust(mg/Nm3)
~20,000 ~15 <2
<20
ESP
IDF Absorber
WESP
Stack
Gas Heater
Air preheater
Gas Cooler
<300
Temp(℃)
~370 >80~120 ~90 50 >80
<2
11
Non Leak GGH
Boiler
De-NOx
Waigaoqiao 2 Power Plant
~1950
Environment Protection Island
Limestone
Sea water
Magnesium
LNB
SNCR
SCR
ESP
Low-low Temp ESP
Wet ESP
12
Dry
Content
• Introduction of SEC-PGEPE
• Environment Protection Island
Introduction of DeNOx/FGD/Particle Control Technology
DeNOx
• FGD
• Particle Control
13
MENU
LNB①
SNCR②
SCR③
DeNOx FGD Particle Control
LNB SNCR SCR
MENU
14
DeNOx Technology
LNB SCR SNCREfficiency 50%-60% 50%-90% 30%-50%
Initial Cost Low High Medium
Operation Cost Low Medium Medium
Catalyst No Yes No
Recommend Boiler PC boiler Both CFB boiler and PC boiler
CFB Boiler
Emission: <600mg/Nm3 Recommend Tech: LNBEmission: <300mg/Nm3 and CFB Recommend Tech: SNCREmission: <300mg/Nm3 and PCB Recommend Tech: LNB+SCR
DeNOx FGD
LNB SNCR SCR
MENU
15
Particle Control
20112011
2012
Bench Scale Researsh
(30KW drop tube furnace)
Pilot Scale Research
(3MW Pilot Test Facility)
Numerical Analysis
Practical Application
(Full scale furnace)
2008
Development of Composite Air Staged Low NOx Combustion System (CASLNCS-200TM)
Composite Air Staged Low NOx Combustion System (CASLNCSTM) is developed on bench and pilot scale research, numerical analysis and practical application by Shanghai Boiler Works Ltd. (SBWL).
DeNOx FGD Particle Control
LNB SNCR SCR
MENU
CASLNCSTM has excellent performance on full load low NOx, high combustion efficiency, anti-slagging, anti-corrosion, and can reduce gas side energy imbalance at furnace outlet.
CASLNCS-200TM has obtained a number of invention patents and trademarks authorized.
CASLNCS-200TM has been applied to more than 200 new construction and retrofit boilers.
CASLNCS-200TM has reached the leading level in the world, which was authenticated by National Electricity Technology Market Association in 2012.
Mainburner
Low AGP burner
Summary of Composite Air Staged Low NOx Combustion System (CASLNCS-200TM)
High AGP burner
UnitName
Coal typeNOx
(mg/m3,O2=6%)
Tai shanHigh volatile bituminous
<150
Jian biLignite and bituminous
<200
An qingMedium volatile
bituminous<300
Xin mi Lean coal <600
Jiao zuo anthracite <650
Part Low NOx Retrofit Achievement
DeNOx FGD Particle Control
LNB SNCR SCR
MENU
Reaction principles:
2(NH2)2CO+4NO+O2→4N2+2CO2+4H2O
2(NH2)2CO+2NO+O2→3N2+2CO2+4H2O
Reaction temperature:850 ℃~1200 ℃
Reduction agent:Urea,ammonia aqueous
Catalyst:No catalyst
Efficiency: 50%-70% in CFB boiler
30%-50% in PC boiler
SNCR
DeNOx FGD Particle Control
LNB SNCR SCR
MENU
18
boiler
PumpDilution waterMetering module
Static mixer
Injection groups
Distribution module
Gasified airCompressed Air
Cooling air
Metering equipment
Dilution water module
The reagent storage tankFeed pump
Feed module
DeNOx FGD Particle Control
LNB SNCR SCR
Process
MENU
19
SNCR ProjectsType of Boiler CFB Boiler
Gas flow 1261453Nm3/h
Temp 850~895℃
Inlet NOx 200mg/Nm3
Outlet NOx 100mg/Nm3
Efficiency Required: 50%Actual: 70%
NSR 1.4
DeNOx FGD Particle Control
LNB SNCR SCR
20
MENU
Shuozhou Power Plant 2ⅹ350MW SNCRTime of Commission: Nov, 2015.
Type of Boiler PC Boiler
Gas flow 1869261Nm3/h
Temp 950~1150℃
Inlet NOx 860mg/Nm3
Outlet NOx 600mg/Nm3
Efficiency Required: 30%Actual: 50%
NSR 1.45
SNCR Projects
DeNOx FGD Particle Control
LNB SNCR SCR
MENU
21
Hanfeng Power Plant 2ⅹ600MW SNCRTime of Commission: March, 2016
Principle of SCR
• 4NO + 4NH3 + O2 → 4N2 + 6H2O
• NO + NO2 + 2NH3 → 2N2 + 3 H2O
Catalyst
Reagent:
To stack
N2& H2ONH3
Flue gas
(NOx)
Recommend Temp: 320℃-420℃
SCR
DeNOx FGD Particle Control
LNB SNCR SCR
MENU
22
23
Evaporator
Dilution Fan
Mixer
Surge Tank
Pyrolysis
Electrical Heater
Hot Air
Urea Solution
Tank
Bucket Elevator
Urea Solution Storage
Tank
Inlet Duct
Outlet Duct
Reactor
Inlet Duct
Outlet Duct
Reactor
Anhydrous Ammonia Tank
Reagent Storage System
Reagent Storage System
Reactor System
Reactor System
SCR Reduction Agent
Ammonia,liq
Urea,pyrolysis
Urea,hydrolysis
Ammonia,aqua
Response Very fast Very fast Medium Fast
Cost Medium High High Medium
Running Pressure
High Atm Medium Atm
Ammonia Concentration
100% <5% after dilution
~37% after hydrolysis, <5% after dilution
~25-28%
Safety Low High Medium Medium
Access Easy Easy Easy Hard
Domestic Share ~40% ~35% ~15% ~5%
DeNOx FGD
LNB SNCR SCR
MENU
24
Particle Control
25
Songyu Power Plant 2X300MW
Time of Commission: 2006
Retrofitting project, First Domestic SCR
Boiler Type PC Boiler
Gas Flow 977077Nm3/h
Temp℃ 380
NOx Inlet 450-707mg/Nm3
NOx Outlet -
DeNOx Efficiency 60%
SO2 to SO3 <1
Ammonia slip 3ppm
Ash Concentration 26g/Nm3
MENUDeNOx FGD
LNB SNCR SCR
Particle Control
26
Boiler Type PC Boiler
Gas Flow 2938320Nm3/h
Temp℃ 378
NOx Inlet 450mg/Nm3
NOx Outlet 90mg/Nm3
DeNOx Efficiency 80%
SO2 to SO3 <1
Ammonia slip 3ppm
Ash Concentration 41g/Nm3
DeNOx FGD
LNB SNCR SCR
MENUParticle Control
Puqi Power Plant 2X1000MWNew Project, High Ash
Time of Commission: Oct, 2012
27
Boiler Type PC Boiler
Gas Flow 1923400Nm3/h
Temp℃ 377
NOx Inlet 400mg/Nm3
NOx Outlet 80mg/Nm3
DeNOx Efficiency 80%
NH3/NOx 0.82
SO2 to SO3 <1
Ammonia slip 3ppm
Ash Concentration 57.9(79)g/Nm3
DeNOx FGD
LNB SNCR SCR
MENUParticle Control
Yaomeng Power Plant 2X600MWRetrofitting Project, High Ash
Time of Commission: Jan, 2013
Boiler Type PC Boiler
Gas Flow 2575872Nm3/h
Temp℃ 376
NOx Inlet 450mg/Nm3
NOx Outlet 80mg/Nm3
DeNOx Efficiency Required 82.2%Actual 92.5%
SO2 to SO3 <1
Ammonia slip 3ppm
Air Preheater retrofitted
IDF retrofitted
Boiler steel structure Checked
28
DeNOx FGD
LNB SNCR SCR
MENUParticle Control
Waigaoqiao 2 Power Plant 2X900MWRetrofitting Project
Time of Commission: 2013
Content
• Introduction of SEC-PGEPE
Environment Protection Island
Introduction of DeNOx/FGD/Particle Control Technology
• DeNOx
FGD
• Particle Control
29
MENU
Process of FGD-Limestone
SO2+CaCO3+1/2 O2+2H2O
CaSO4·2H2O+CO2
Boiler
Stack
IDFBUF GGH Absorber
Gypsum dehydration
• GGH
• Absorber
• BUF
• Limestone supply
• Gypsum dehydration
Principle
Limestone supplier
MENU
SCRAir
PreheaterESP
30
DeNOx FGD Particle Control
FGD-Limestone Absorber
Spray fit for
large
absorber
Recycling pump
Mixer
Air
Clean Gas
Original Gas
Spray = simple
Fit for large absorber
Low pressure drop
No block
High Stability
Easy for maintenance
MENU
31
DeNOx FGD Particle Control
Limestone supply system
MENU
32
DeNOx FGD Particle Control
Gypsum dehydration
MENU
33
DeNOx FGD Particle Control
Recycling pump
Cylinder Absorber
Clean gas
demister
blender
Oxidation air
Raw gas
Clean gas
Raw gas
Oxidation air
blender
demister
Recycling pump
Square Absorber
SELECTIVE AND SIMPLE
MENU
34
DeNOx FGD Particle Control
• High FGD and De-dust• The diameter of absorber can be narrowed.
High gas rate
Big surface shaking of drop
Big mixture drop to promote absorption reaction of SO2 .
Smaller section area of absorber
300MW FGD absorber
4.5 m/s 11.5 m
30
.5 m
4.0 m/s
12.2 m
29
.3 m
3.5 m/s
13.0 m
28
.0 m
3.0 m/s
14.1 m
26
.7 m
(m/s)Gas rate
100
Normal confine
High gas rate confine
SMALL
MENU
35
DeNOx FGD Particle Control
New low pressure spiral nozzle is used to decrease power of circulation pump and increase De-duct performance of FGD
0
1
2
3
4
5
6
1 2 3 4
ポンプ台数吸収塔出口ばいじん濃度 mg/m3N
従来ノズル
新型ノズル
◎spiral nozzle
low injection pressure and fine mist to increase the de-dust performance and decrease circulation pump power
Used nozzle
(hollow)
New nozzle
(spiral)
98.2
98.4
98.6
98.8
99
99.2
99.4
99.6
1 2 3 4
脱硫効率%
ポンプ台数
従来ノズル
新型ノズル
FGD efficiency
0.1% increase
SO2 reduced 10% at outlet
FGD Efficiency enhanced Outlet Dust decreased
5 3 mg/m3N
Gas outlet
nozzle
demister
Gas inlet
blender
pump
Saving
MENU
100% 80%
0%
50%
100%
Used Nozzle New Nozzle
Power of Recycling Pump
36
DeNOx FGD Particle Control
Side Atomizer
Characteristics
Easy maintenance High oxidation performance
Side atomizing air injection
Oxidation with less air
Easy maintenance for periodical inspection
Simple configuration inside absorber
Injected air is sheared and broken into fine bubbles
No deposit inside absorber
Air bubbles are spread and recycled in whole absorber tank
video\攪拌機ビデオ.avi
Agitator
Oxidizing Air
•Absorber
38
Gas Flow 1,629,000Nm3/h
Inlet Temp 147.2℃
Inlet SO2 1800mg/m3N-dry
Inlet Dust 162mg/m3N-dry
Outlet Temp ≧ 81.7℃
Outlet SO2≦ 50mg/m3N-dry
(η=96%)
Outlet Dust ≦ 50mg/m3N-dry
Byproduct Gypsum (CaSO4•2H2O)
Purity ≧ 90%
Moisture ≦ 10wt%
GGH Yes
Baogang Power Plant 3x350MWRetrofitting project
Time of Commission: 2008-2009
FGD Projects
MENUDeNOx FGD Particle Control
FGD-Projects
MENU
39
Pingshan Power Plant 2X660MWNew project
Time of Commission: Feb, 2016
DeNOx FGD
Gas Flow 2011342Nm3/h
Inlet Temp 87℃
Inlet SO2 1948mg/m3N-dry
Inlet Dust 15mg/m3N-dry
Outlet Temp 44.5 ℃
Outlet SO2≦ 20mg/m3N-dry (η=99%)
Outlet Dust ≦ 10mg/m3N-dry
Byproduct Gypsum
Purity ≧ 90%
Moisture ≦ 10wt%
GGH No
Particle Control
FGD- Projects
MENU
40
Waigaoqiao 2 Power Plant 2×900MWRetrofitting project
Time of Commission: Dec, 2015
DeNOx FGD
Gas Flow 3097060Nm3/h
Inlet Temp 90℃
Inlet SO2 905mg/m3N-dry
Inlet Dust 15mg/m3N-dry
Outlet Temp 49 ℃
Outlet SO2≦ 14mg/m3N-dry
(η=98.47%)
Outlet Dust ≦ 10mg/m3N-dry
Byproduct Gypsum
Purity ≧ 90%
Moisture ≦ 10wt%
GGH Yes, NL-GGH
Particle Control
Magnesium Desulfurization
41
Gas Flow 1.1*105Nm3/h
Inlet Temp 170℃
Inlet SO2 2500mg/m3N-dry
Inlet Dust 225mg/m3N-dry
Outlet Temp 58℃
Outlet SO2≦ 87.5mg/Nm3-dry
(η=96.5%)
Outlet Dust ≦ 50mg/m3N-dry
Byproduct No
GGH NoYadong Chemical Plant
Time of Commission: Dec, 2015
MENU
Semi-Dry Desulphurization
42
MENU
Water
Roots blower
Slaked Lime Silo
Belt Scale
Air trough conveyor
Air trough conveyor
Dust Silo
Dust Cleaning
Absorber
Conveyor Fan
IDF
Distributor
Flue Gas
Clean Gas
FGD Comparison
43
MENU
Semi-Dry Wet
De-SOx efficiency ~70% ~99%
Ca/S ratio 1.3~1.5 1.03
Electricity ratio 0.8% 0.9%
Water consumption presume as 1 1.1
Water quality High Low
Absorbent CaO/Ca(OH)2 CaCO3
Negative Effect on ESP High Low
Unit Load following capability Bad Good
Waste Water None Yes
Operation Cost presume as 1 0.7
Investment Cost presume as 1 1.3
Byproduct Gypsum containing dust, low value Pure gypsum
Content
• Introduction of SEC-PGEPE
• Environment Protection Island
Introduction of DeNOx/FGD/Particle Control Technology
• DeNOx
• FGD
Particle Control
44
MENU
High Efficiency Filter Products Before Absorber
DeNOx FGD
ESP and Bag Filter WESP
High Efficiency Filter Products After AbsorberB a g F i l t e r
MENU
45
Particle Control
E S P H y b r i d F i l t e r
W E S P
46
MENU
Advance-Patent technology
Bi-Corona® PM2.5 3/4 decreased
PM2.5Before
After
TVS Twin valve system AESM Gas consumption 40% decreased
Delta Wing® Top gas distribution technology
WFGD stack particulate emission includes:
Fly Ash Gypsum carryover H2SO4(sulfuric acid) Other Condensable
MENU
47
WESPWESP is the most useful equipment for the fine particulate matter, especially suit for the situation after the WFGD, for the gas here carried much water.
DeNOx FGD
ESP and Bag Filter WESP
Particle Control
48
Thank You