MHPS Global Activities for Air Quality Control System Technology

Transcription

1 MHPS Global Activities for Air Quality Control System Technology Sep.2, 2015 Tetsu Ushiku Mitsubishi Hitachi Power Systems, LTD

2 Mitsubishi Hitachi Power Systems, Ltd (MHPS) Name Head Office MITSUBISHI HITACHI POWER SYSTEMS, LTD. Yokohama, Kanagawa, JAPAN Representatives Koji Tanaka (Chairman of the Board) Takato Nishizawa (President and CEO) Integration in the Thermal Power Generation Systems Field Major Operation Effective Date Employees Business for (1) Thermal Power Generation Systems (2) Geothermal Power Generation Systems (3) Environmental Systems (4) Fuel Cells February 1, ,000 (incl. 7,600 outside Japan) 1

3 MHPS Air Quality Control System for Coal Fired Plant Harmful NO is decomposed into harmless N 2 and H 2 O by catalytic action catalytic action 4NO + 4NH 3 + O 2 4N 2 + 6H Boiler 2 O 360 SCR AH GGH ESP Harmful SO 2 is recovered as harmless gypsum(caso 4 ) SO 2 + CaCO 3 + 2H 2 O CaSO 4 2H 2 O + CO 2 FG D 50 GG H FGD Stack 2 次 空 気 Low NOx Combustion SCR GGH Heat Extractor (GGH: Gas to Gas Heater) ESP* * ESP will be supplied by MHI-Mechatronics Systems (MHI-MS) or Hitachi Plant Construction (HPC) GGH Re Heater In Oct.2015, MHPS will integrate the precipitator business, One-stop AQCS solution by MHPS MHI-MS and HPC establish a new company as an MHPS group. World lowest level emission (SOx, NOx, PM) can be achieved by applying the integrated AQCS system 2

4 MHPS s AQCS Global Activities MHPS Delivered AQCS units all over the world Denmark Finland Poland Germany Russia 4 Czech Austria 4 England Ukraine S.Korea Netherlands 4 17 L Yugoslavia 9 Portugal Greece China Japan 4 Turkey 1 L 7 L Italy 4 Spain , Libya India L Iraq 11 1 Taiwan Saudi Arabia 5 57 Egypt 21 4 Myanmar Hong Kong Thailand Philippines Zambia Malaysia Australia Indonesia South Africa Singapore Vietnam 5 MHPS Canada 1 L USA 341 Mexico Colombia 5 2 Chile 11 3 Curacao 3 Brazil 27 2 Venezuela 4 :SCR 1,027 Units (13 Countries) :ESP 3,261 Units (32 Countries) :FGD 323 Units (24 Countries) Number :References L :License 3

5 Technology Line Up ~Different Type of Flue Gas Desulfurization (FGD) ~ FGD Wet Process Limestone-Gypsum Process Seawater Process Soda Process Magnesium Process Dry Process Activated Carbon Process Electron Beam Process Semi Dry Process Spray Dry Process 4

6 Limestone Gypsum FGD System FGD Absorber Chemical Reaction in Absorber SO2 absorbent (Limestone Slurry) Clean gas Flue gas Absorber By-product (Gypsum) SO 2 + CaCO 3 (limestone)+ 1/2O 2 + 2H 2 O CaSO 4 2H 2 O(gypsum) + C Features Limestone & Gypsum Handling System is needed. Valuable gypsum for sale 5

7 Technology Line Up ~Selection of Flue Gas Desulfurization (FGD) Technology~ Wet Limestone-Gypsum FGD Gas distribution Liquid distribution Open Spray Packing Tray Spray nozzle Multi Stage Spray Bank Originated from BHK Technology Straight upward nozzle Single Stage Spray Originated from MHI Technology 6

8 MHPS Development History of FGD 7

9 Technology Line Up ~Excellent FGD Absorbers Line-up~ Originated from Mitsubishi Originated from BHK (Hitachi) Optimization Rectangle DCFS Round Spray Tower Absorbent sprays upward like a fountain by straight nozzle from lower side Pressurized Absorbent sprays downward from top. 105 units 60 units Sea water Round Spray Tower 8

10 FGD Experiences for Large Absorber Module No. Customer Capacity (MW) Fuel Capacity per Absorber Module (MW) SO 2 Removal Eff. (Guaranteed) (%) Commercial Operation Gas Flow Rate of Absorber (Nm 3 /h wet) 1 Kansai E.P. Co. / Akou #2 (Japan) 600 Oil Dec ,780,000 2 E.P.D. Co. / Matsuura #1 (Japan) Coal 500 x 2 95 Jul ,700,000 3 AES (CEGB, National Power) / Drax #1 6 (U.K.) 660 each Coal 660 each 90 Dec May 1995 Feb ,533,566 4 Soma Kyodo Power Co. / Shinchi #1,#2(Japan) Coal 500 x 2 90 Jul ,720,000 5 CEZ A.S. / Chvaletice #1 #4 (Czech) 200 each 6 ENEA Wytwarzanie S.A. / Kozienice #9, #10 (Poland) Coal (Lignite) 500 each Coal 500 each x 2 95 Dec ,066,400 May 2001 Dec ,300,000 7 E.P.D. Co. / Tachibanawan #1/#2 (Japan) Coal Dec ,130, ENEA Wytwarzanie S.A. / Kozienice #4 #8 (Poland) Tennessee Valley Authority / Paradise Fossil Plant #3 (U.S.) Southern Company Alabama Power Company / Gorgas #8 10 (U.S.) Southern Company Georgia Power Company / Scherer #1 4 (U.S.) 200 each Coal Feb ,480, Coal Oct ,155, Coal Dec ,384, each Coal 923 each 98 Feb ,959,000 9

11 FGD Experiences for High SO 2 Removal Performances No. Customer Capacity (Eq. MW) Fuel Design Data (SO 2 Emission Requirement) Inlet SO 2 (mg/nm 3 ) SO 2 Removal Eff. (%) 1 Ameren / Coffeen #2 (U.S.) 590 Coal 7, Ameren / Duck Creek #1 (U.S.) 444 Coal 8, Kobe Steel / Kakogawa Works (Japan) Nippon Petroleum Refining Co., Ltd. / Osaka (Japan) Kansai Electric Power Co., Inc. / Gobo #3 (Japan) Tennessee Valley Authority / Paradise Fossil Plant #3 (U.S.) Sintering Plant 27, Residue Oil 6, Oil 1, Coal 6, Southern Company Alabama Power Company / Gorgas #8 10 (U.S.) Southern Company Alabama Power Company / Miller #1 (U.S.) Coal 3, Coal 1,

12 MHPS Seawater FGD System Clean Gas Chemical Reaction in Absorber SO 2 + HCO /2O 2 Flue gas SO2 absorbent (Seawater) H + + SO CO 2 FGD Absorber Clean gas Features Patented P JP Aeration Basin is required. Simple System(Only Seawater and Air) No additional Chemicals and No byproducts. 11

13 Comparison of Limestone and Seawater process Limestone-Gypsum FGD Seawater FGD 1. Process Clean Gas Same Component Clean Gas Filter Absorber Absorber Flue Gas Gypsum Flue Gas Air Aeration Basin Air Limestone Water Seawater Seawater Discharge 2. SO 2 removal efficiency ~ 98 % ~ 98 % 3. Absorbent Bicarbonate ( HCO 3 - :from CaCO 3 ) Bicarbonate ( HCO - 3 seawater) :from 4. By-Product Gypsum N/A 5. BOP system Limestone & Gypsum Treatment System Aeration Basin 12

14 MHPS Seawater FGD Experiences Indonesia Paiton 3 Saudi Arabia Shuqaiq 1-3 Gross Power (MW) Fuel Coal Oil Gas Flow Rate (Nm3/h) 2,975, ,000 Inlet SO 2 Conc. (ppm) Outlet SO 2 Conc. (ppm) Plant Appearance World largest of single module absorber absorber for seawater process. World highest class of inlet SO 2 conc. for for seawater process. 13

15 MHPS High Efficiency PM Removal System Comparison Conventional System Boiler DeNOx L-Temp ESP GGH DeSOx GGH Wet ESP Stack NOx Dust Heat Extractor SOx Dust Dust High Efficiency Dust Removal System Boiler DeNOx GGH L-L Temp ESP DeSOx GGH Stack NOx Heat Extractor (for Feed-Water Heating or Flue Gas Reheating) Dust SO 3 SOx Dust When PM regulation is stringent, conventional system need additional Wet ESP. High efficiency PM removal system can satisfy PM and SO 3 requirement without Wet ESP. 14

16 High Efficiency AQCS development history (PM, SO 2 ) AQCS in Japan commercialized from 1970 s High Efficiency AQCS with Low Low temperature EP has been developed to meet the sever environmental demand Emission level now reaches world lowest level EP (Low temp) Non Leak Non Leak RGGH FGD Stack EP GGH GGH Stack (Low temp) (H/E) FGD (R/H) Non Leak Non Leak GGH EP GGH Stack (H/E)(LL temp) FGD (R/H) SO2 Emission level in Japan(ppm) PM Emission level in Japan(ppm) SO2:100ppm SO2:50ppm PM: <20mg/m 3 N Non Leak GGH applied to prevent dirty gas leakage. SO2:24ppm PM: < 7mg/m 3 N High Efficiency System High Efficiency system with low-low temperature EP applied EP : Electrostatic Precipitator GGH : Gas Gas Heater RGGH : Rotary GGH H/E : Heat Extractor R/H : Re Heater 15

17 MHPS SCR System Honeycom b Catalyst Plate Catalyst or SCR Performance Approx. 90% NOx removal efficiency is achievable. SCR System There are two types of catalyst which MHPS can provide, i.e. Honeycomb type and Plate type catalyst. Either type of MHPS catalyst has the largest market share in the world. With these types of catalyst, MHPS can provide the SCR system to all types of fuel (gas, oil, coal, etc.) MHPS is awarded the chairman prize of JSIM* for developing a new high mercury oxidation catalyst. * The Japan Society of Industrial Machinery Manufacturers 16

18 MHPS Group s Electrostatic Precipitator Integration to MHPS Group (Oct. 2015) MHPS will integrate MHI-MS* and HPC* as group company to complete MHPS group s AQCS lineup. Dry Electrostatic Precipitator (DEP) Wet Electrostatic Precipitator (WEP) *) MHI-MS : Mitsubishi Heavy Industries Mechatronics Systems, Ltd. HPC : Hitachi Plant Construction, Ltd.

19 Moving Electrode type Electrostatic Precipitator (MEEP) Features of MEEP Moving Electrode type Electrostatic Precipitator (MEEP) separate the dust deposit by both the moving type electrode and rotating brush mechanism. MEEP made it possible to realize down-sizing of ESP as well as the effective collection of high resistivity dust in the Dry type ESP Fixed Type ESP MEEP Brush 18

20 Mercury Removal Technology ~ Hg removal in TRAC with NH 4 Cl Injection~ SCR with higher Hg oxidation and lower SO 2 conversion(trac ) TRAC Boiler Hg DeNOx ESP GGH NH 4 Cl Injection DeSOx Stack Ash Sold NH 4 Cl Injection for both NH 3 and Cl supply ORP* control Element Mercury (Hg 0 ) is suppressed by controlling Oxidation-Reduction Potential(ORP) *ORP: Oxidation-Reduction Potential 19

21 Mercury Removal Technology ~ NH 4 Cl Injection Mercury Removal System ~ NH 4 Cl Injection Mercury Removal System (with SCR/FGD) Halogen (HCl, NH 4 Cl etc) injection for Hg oxidation and removal at wet FGD scrubber. ORP for Hg re-emission control. (Hg 0 ) (Hg 2+ ) (Hg (p) ) Boiler Halogen SCR (TRAC) NH 3 NH 3 * ORP Oxidation Reduction Potential ** If Required AH ESP FGD * Air ORP Stack 20

22 Summary MHI and Hitachi integrated MHPS MHPS s one-stop solution of AQCS provide total solution of power plant emission. Limestone FGD and Seawater FGD can be provided by MHPS ESP also forms integrated company Oct. Mercury Removal technology also available.

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