Flue Gas Cleaning of Coal-fired Power Plant and SEC Technology. Shanghai Electric Power Generation Environment Protection Engineering Co., Ltd.

Transcription

1 Flue Gas Cleaning of Coal-fired Power Plant and SEC Technology Shanghai Electric Power Generation Environment Protection Engineering Co., Ltd.

2 Content Introduction of SEC-PGEPE Environment Protection Island Introduction of DeNOx/FGD/Particle Control Technology DeNOx FGD Particle Control 2

3 ..Desulfurization....Environment.. SEC-PGEPE Foundation of Company Company Name Changed Company Share Changed 3

4 Background Chinese Increasingly Stringent Environmental Requirements Vs India new emission norms from year Ist Jan Ultra Low Emission PM NOx 100 SO 2 India new emission norms from Ist Jan SO2 NOx PM SO2 NOx PM 4

5 Milestones of Typical Reference Dust collector Da Gang Power Station, Tian Jin De-NOx Equipment (SCR SNCR) Songyu 350MW SCR (First Domestic SCR) Low-low Temp ESP/NL-GGH De-SOx Equipment(GGH) ShanghaiWaigaoqiao 300MW Advanced Low-NOx Combustion System Environment Protection Island Transferred FGD Tech Transferred SCR Tech Transferred Low-low Temp ESP Tech Our technologies are authorized for global markets! Developed WESP Tech 5

6 Background: World Wide Emission Standard mg/nm NOx SO 2 PM India Euro USA Average China For India Unit 500MW, SO2<200mg/Nm³; Unit<500MW, SO2 <600mg/Nm³ 6

7 Main Business Engineering Procurement Construction Project Proposal Project Detail Design Project Basic Design Equipment Design Equipment Procurement Manufacture Supervision Manufacture Supervision Project Management Construction Supervision Service System Commissioning Training and After Service 7

8 Mega Watt Units Accomplished Capacity and Units FGD De-NOx Low-low Temp ESP Unit Capacity Unit Number Statistics by the end of Jan

9 Content Introduction of SEC-PGEPE Environment Protection Island Introduction of DeNOx/FGD/Particle Control Technology DeNOx FGD Particle Control 9

10 Environment Protection Island(EPI) More Environment More Energy Saving More Efficiency More Economic 10

11 EPI Project Example Waigaoqiao 2 Power Plant Non Leak GGH Boiler De-NOx Air preheater Gas Cooler ESP WESP Gas Heater IDF Absorber Stack NOx (mg/nm 3 ) <300 <20 <20 SO x (mg/nm 3 ) ~2000 ~1950 <20 <20 Dust (mg/nm 3 ) ~20,000 ~15 <2 <2 Temp ( ) ~370 ~120 ~90 50 >80 >80 11

12 Environment Protection Island LNB SNCR SCR Limestone Sea water Magnesium Dry ESP Low-low Temp ESP Wet ESP 12

13 Content Introduction of SEC-PGEPE Environment Protection Island Introduction of DeNOx/FGD/Particle Control Technology DeNOx FGD Particle Control 13

14 DeNOx FGD Particle Control LNB SNCR SCR 2 SNCR 1 LNB 3 SCR 14

15 DeNOx Technology DeNOx FGD Particle Control LNB SNCR SCR LNB SCR SNCR Efficiency 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 Emission: <600mg/Nm3 Emission: <300mg/Nm3 and CFB Emission: <300mg/Nm3 and PCB CFB Boiler Recommend Tech: LNB Recommend Tech: SNCR 15 Recommend Tech: LNB+SCR

16 DeNOx FGD Particle Control LNB SNCR SCR Development of Composite Air Staged Low NOx Combustion System (CASLNCS-200 TM ) Numerical Analysis Practical Application (Full scale furnace) Bench Scale Researsh (30KW drop tube furnace) Pilot Scale Research (3MW Pilot Test Facility) Composite Air Staged Low NOx Combustion System (CASLNCS TM ) is developed on bench and pilot scale research, numerical analysis and practical application by Shanghai Boiler Works Ltd. (SBWL).

17 CASLNCS TM has excellent performance on full load low NOx, high combustion efficiency, anti-slagging, anticorrosion, and can reduce gas side energy imbalance at furnace outlet. CASLNCS-200 TM has obtained a number of invention patents and trademarks authorized. CASLNCS-200 TM has been applied to more than 200 new construction and retrofit boilers. CASLNCS-200 TM has reached the leading level in the world, which was authenticated by National Electricity Technology Market Association in DeNOx FGD Particle Control LNB SNCR SCR Summary of Composite Air Staged Low NOx Combustion System (CASLNCS-200 TM ) High AGP burner Low AGP burner Main burner Unit Name Tai shan Jian bi An qing Coal type High volatile bituminous Lignite and bituminous Medium volatile bituminous Part Low NOx Retrofit Achievement NOx (mg/m 3,O 2 = 6%) <150 <200 <300 Xin mi Lean coal <600 Jiao zuo anthracite <650

18 DeNOx FGD Particle Control Reaction principles: LNB SNCR SCR 2(NH 2 ) 2 CO+4NO+O 2 4N 2 +2CO 2 +4H 2 O 2(NH 2 ) 2 CO+2NO+O 2 3N 2 +2CO 2 +4H 2 O Reaction temperature:850 ~1200 Reduction agent:urea,ammonia aqueous Catalyst:No catalyst Efficiency: 50%-70% in CFB boiler 30%-50% in PC boiler SNCR 18

19 DeNOx FGD Particle Control LNB SNCR SCR Process Compressed Air Cooling air Gasified air Distribution module Injection groups boiler Static mixer Metering equipment Dilution water Pump Dilution water module Metering module The reagent storage tank Feed pump Feed module 19

20 DeNOx FGD Particle Control LNB SNCR SCR SNCR Projects Type of Boiler Gas flow CFB Boiler Nm3/h Temp 850~895 Inlet NOx Outlet NOx 200mg/Nm3 100mg/Nm3 Shuozhou Power Plant 2ⅹ350MW SNCR Time of Commission: Nov, Efficiency Required: 50% Actual: 70% NSR

21 DeNOx FGD Particle Control LNB SNCR SCR SNCR Projects Type of Boiler PC Boiler Gas flow Nm 3 /h Temp 950~1150 Inlet NOx 860mg/Nm 3 Outlet NOx 600mg/Nm 3 Hanfeng Power Plant 2ⅹ600MW SNCR Time of Commission: March, 2016 Efficiency Required: 30% Actual: 50% NSR

22 Principle of SCR DeNOx FGD Particle Control LNB SNCR SCR 4NO + 4NH 3 + O 2 4N 2 + 6H 2 O NO + NO 2 + 2NH 3 2N H 2 O SCR Reagent: NH 3 To stack N 2 & H 2 O Flue gas (NOx) Catalyst Recommend Temp:

23 Reagent Storage System Anhydrous Ammonia Tank Reagent Storage System Urea Solution Tank Bucket Elevator Dilution Fan Evaporator Urea Solution Storage Tank Hot Air Mixer Surge Tank Electrical Heater Pyrolysis Reactor System Reactor Inlet Duct Outlet Duct Reactor System Reactor Inlet Duct Outlet Duct 23

24 SCR Reduction Agent Ammonia, liq Urea, pyrolysis Urea, hydrolysis Response Very fast Very fast Medium Fast Ammonia, aqua Cost Medium High High Medium Running Pressure Ammonia Concentration DeNOx FGD High Atm Medium Atm 100% <5% after dilution Particle Control LNB SNCR SCR ~37% after hydrolysis, <5% after dilution ~25-28% Safety Low High Medium Medium Access Easy Easy Easy Hard Domestic Share ~40% ~35% ~15% ~5% 24

25 DeNOx FGD Particle Control LNB SNCR SCR Boiler Type PC Boiler Gas Flow Nm 3 /h Temp 380 NOx Inlet mg/Nm 3 NOx Outlet - DeNOx Efficiency 60% Songyu Power Plant 2X300MW Retrofitting project, First Domestic SCR Time of Commission: 2006 SO 2 to SO 3 <1 Ammonia slip 3ppm Ash Concentration 26g/Nm 3 25

26 DeNOx FGD Particle Control LNB SNCR SCR Boiler Type PC Boiler Gas Flow Nm 3 /h Temp 378 NOx Inlet 450mg/Nm 3 NOx Outlet 90mg/Nm 3 DeNOx Efficiency 80% SO 2 to SO 3 <1 Puqi Power Plant 2X1000MW New Project, High Ash Time of Commission: Oct, 2012 Ammonia slip 3ppm Ash Concentration 41g/Nm 3 26

27 DeNOx FGD Particle Control LNB SNCR SCR Boiler Type PC Boiler Yaomeng Power Plant 2X600MW Retrofitting Project, High Ash Time of Commission: Jan, 2013 Gas Flow Nm 3 /h Temp 377 NOx Inlet 400mg/Nm 3 NOx Outlet 80mg/Nm 3 DeNOx Efficiency 80% NH 3 /NOx 0.82 SO 2 to SO 3 <1 Ammonia slip 3ppm Ash Concentration 57.9(79)g/Nm 3 27

28 DeNOx FGD Particle Control LNB SNCR SCR Boiler Type PC Boiler Waigaoqiao 2 Power Plant 2X900MW Retrofitting Project Time of Commission: 2013 Gas Flow Nm 3 /h Temp 376 NOx Inlet 450mg/Nm 3 NOx Outlet 80mg/Nm 3 DeNOx Efficiency Required 82.2% Actual 92.5% SO 2 to SO 3 <1 Ammonia slip Air Preheater IDF Boiler steel structure 3ppm retrofitted retrofitted Checked 28

29 Content Introduction of SEC-PGEPE Environment Protection Island Introduction of DeNOx/FGD/Particle Control Technology DeNOx FGD Particle Control 29

30 DeNOx FGD Particle Control Process of FGD-Limestone Absorber GGH BUF Limestone supply Gypsum dehydration Stack Principle SO 2 +CaCO 3 +1/2 O 2 +2H 2 O CaSO 4 2H 2 O+CO 2 Limestone supplier Gypsum dehydration Boiler SCR Air Preheater ESP IDF BUF GGH Absorber 30

31 DeNOx FGD Particle Control FGD-Limestone Absorber Spray = simple Fit for large absorber Low pressure drop No block Easy for maintenance Clean Gas Original Gas Air Mixer Spray fit for large absorber High Stability Recycling pump 31

32 DeNOx FGD Particle Control Limestone supply system 32

33 DeNOx FGD Particle Control Gypsum dehydration 33

34 DeNOx FGD Particle Control SELECTIVE AND SIMPLE Cylinder Absorber Square Absorber demister Clean gas demister Clean gas Raw gas Oxidation air blender Raw gas Recycling pump Oxidation air blender Recycling pump 34

35 30.5 m 29.3 m 28.0 m 26.7 m DeNOx FGD Particle Control SMALL High FGD and De-dust The diameter of absorber can be narrowed. 100 High gas rate Big surface shaking of drop Big mixture drop to promote absorption reaction of SO 2. Normal confine High gas rate confine Smaller section area of absorber (m/s) Gas rate 300MW FGD absorber 11.5 m 4.5 m/s 12.2 m 4.0 m/s 13.0 m 3.5 m/s 14.1 m 3.0 m/s 35

36 脱硫効率 % DeNOx FGD Particle Control Saving New low pressure spiral nozzle is used to decrease power of circulation pump and increase De-duct performance of FGD demister nozzle Gas outlet Used nozzle (hollow) New nozzle (spiral) Gas inlet spiral nozzle low injection pressure and fine mist to increase the de-dust performance and decrease circulation pump power blender pump Power of Recycling Pump 100% 100% 80% 50% 0% Used Nozzle New Nozzle FGD efficiency 0.1% increase ポンプ台数 SO 2 reduced 10% at outlet 従来ノズル 新型ノズル FGD Efficiency enhanced 吸収塔出口ばいじん濃度 mg/m3n mg/m 3 N 従来ノズル 新型ノズル ポンプ台数 Outlet Dust decreased 36

37 Side Atomizer Characteristics Oxidation with less air Easy maintenance for periodical inspection Absorber Side atomizing air injection Oxidizing Air Simple configuration inside absorber Injected air is sheared and broken into fine bubbles Agitator video\ 攪拌機ビデオ.avi No deposit inside absorber Air bubbles are spread and recycled in whole absorber tank Easy maintenance High oxidation performance

38 DeNOx FGD Particle Control FGD Projects Baogang Power Plant 3x350MW Retrofitting project Time of Commission: Gas Flow 1,629,000Nm 3 /h Inlet Temp Inlet SO2 Inlet Dust 1800mg/m3N-dry 162mg/m3N-dry Outlet Temp 81.7 Outlet SO2 Outlet Dust Byproduct 50mg/m3N-dry (η=96%) 50mg/m3N-dry Gypsum (CaSO4 2H2O) Purity 90% Moisture GGH 10wt% Yes 38

39 DeNOx FGD Particle Control FGD-Projects Pingshan Power Plant 2X660MW New project Time of Commission: Feb, 2016 Gas Flow Nm3/h Inlet Temp 87 Inlet SO2 Inlet Dust 1948mg/m3N-dry 15mg/m3N-dry Outlet Temp 44.5 Outlet SO2 Outlet Dust Byproduct 20mg/m3N-dry (η=99%) 10mg/m3N-dry Gypsum Purity 90% Moisture GGH 10wt% No 39

40 DeNOx FGD Particle Control FGD- Projects Waigaoqiao 2 Power Plant 2 900MW Retrofitting project Time of Commission: Dec, 2015 Gas Flow Nm 3 /h Inlet Temp 90 Inlet SO2 Inlet Dust 905mg/m 3 N-dry 15mg/m 3 N-dry Outlet Temp 49 Outlet SO2 Outlet Dust Byproduct 14mg/m 3 N-dry (η=98.47%) 10mg/m 3 N-dry Gypsum Purity 90% Moisture GGH 10wt% Yes, NL-GGH 40

41 Magnesium Desulfurization Gas Flow 1.1*10 5 Nm 3 /h Inlet Temp 170 Inlet SO2 Inlet Dust 2500mg/m 3 N-dry 225mg/m 3 N-dry Outlet Temp 58 Yadong Chemical Plant Time of Commission: Dec, 2015 Outlet SO2 Outlet Dust Byproduct GGH 87.5mg/Nm 3 -dry (η=96.5%) 50mg/m 3 N-dry No No 41

42 Semi-Dry Desulphurization Slaked Lime Silo Clean Gas Dust Cleaning IDF Belt Scale Distributor Roots blower Air trough conveyor Flue Gas Water Absorber Air trough conveyor Conveyor Fan Dust Silo 42

43 FGD Comparison Semi-Dry Wet De-SOx efficiency ~70% ~99% Ca/S ratio 1.3~ Electricity ratio 0.8% 0.9% Water consumption presume as 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 Investment Cost presume as Byproduct Gypsum containing dust, low value Pure gypsum 43

44 Content Introduction of SEC-PGEPE Environment Protection Island Introduction of DeNOx/FGD/Particle Control Technology DeNOx FGD Particle Control 44

45 DeNOx ESP and Bag Filter FGD Particle Control WESP High Efficiency Filter Products Before Absorber ESP B a g F i l t e r High Efficiency Filter Products After Absorber W E S P H y b r i d F i l t e r 45

46 Advance-Patent technology Delta Wing Top gas distribution technology Bi-Corona PM2.5 3/4 decreased PM2.5 Before After TVS Twin valve system AESM Gas consumption 40% decreased 46

47 DeNOx FGD Particle Control ESP and Bag Filter WESP WESP WESP 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. WFGD stack particulate emission includes: Fly Ash Gypsum carryover H2SO4(sulfuric acid) Other Condensable 47

48 Thank You 48