1ENERGY OF HEAT ENERGY OF LIFE ENERGY OF SOLUTIONS
LOW-COST TECHNOLOGICAL METHODS TO SIGNIFICANTLY REDUCE NOx FOR COAL-FIRED BOILERS
Felix Serant, Evgeny Russkikh SibCOTESAnatoly Smyshlyaev - EC ZIOMAR
POWER-GEN EUROPE June 2007
Capital costs: 4-10 $/kWCapital costs: 10-30 $/kWCapital costs: 90-140 $/kW
TWO-STAGE COMBUSTION SYSTEM AT TOM-USINSKAYA POWER PLANT, RUSSIAMODEL RESEARCH 1 - PC burners2 Oil burners3 Secondary air ports4 OFA portsBoiler frontSec.pl.s/hSec.conv.s/hTrans.zoneECO Tubular a/h-3 Tubular a/h-2 Tubular a/h-3
RESULTS RECEIVED AT TOM-USINSKAYA POWER PLANT, RUSSIAMODEL RESEARCH Excess air: On burners b = 0.74-0.80 Downstream superheater s/h = 1.25
Unburned carbon: 0.4-0.7%Content of 30-50 mg/Nm3Stable output of liquid slag
10
650380
380
Before reconstruction
After reconstruction
Nx,mg/Nm3
330
1
700330
1
1200650900600920700600650650
550380450420650330350400300380380
Ekibastuzskaya GRES-2 (Kazakhstan)Tom-Usinskaya GRES (Russia)Novosibirsk CHP-5 (Russia)Belovskaya GRES (Russia)Tuncbilek Power Plant (Turkey)Scawina Power Plant (Poland)Gacko Power Plant (Bosnia)Novoirkutskaya CHP (Russia)Neivelly Power Plant (India)
1
00
00
00
00
00
00
00
0
0
Nx, /3
2
00
380
Before reconstruction
After reconstruction
Nx,mg/Nm3
330
3
00
380
Before reconstruction
After reconstruction
Nx,mg/Nm3
330
MODEL RESEARCH SymbolTWO-STAGE COMBUSTION SYSTEM AT POWER PLANT EKIBASTUZSKAYA GRES-2, KAZAKHSTAN (Unit-2)NOx = 500-650 mg/Nm3 (O2=6%).mg/Nm3D/D0Boiler frontBoiler frontBoiler front
1
500497
580
590
1
0.8497
0.73500
0.94580
0.97590
1
2
3
MODEL RESEARCH SymbolTWO-STAGE COMBUSTION SYSTEM AT POWER PLANT EKIBASTUZSKAYA GRES-2, KAZAKHSTANContent of NOx 650mg/Nm3(planned value)Platen s/h-1Platen s/h-2
Header for ammonia water inputConv.s/hSec.conv.s/h-1Sec.conv.s/h-2
ECOECOZone for bankrepl.in backpassSec.conv.s/h-1Sec.conv.s/h-2
Conv.s/hHeader for ammonia water inputPlaten s/h-2Platen s/h-1Expansion jointExpansion joint
Motor car roadRail road
MODEL RESEARCH SymbolTHREE-STAGE COMBUSTION ON BOILER OP-210 AT SCAWINA POWER PLANT, POLANDBoiler frontBoiler frontBoiler frontBoiler front1-st zone(burning)2-nd zone(reduction)3-rd zone(reburning)Platen s/hConv.s/h-2,3ECO-1ECO-2Conv.s/h-1Tubular a/hTubular a/hTubular a/h
COAL HANDLING SYSTEM AND HIGH-DENSITY PRESSURE FEED MODEL RESEARCH
Excess air downstream superheater s/h = 1.16-1.25
Unburned carbon: 1.0%Content of CO = 20-50 mg/Nm3Required values for NOx emissions are provided within the entire operation range: 0.7-1.0 Drated RESULTS RECEIVED ON BOILER OP-210 WITH REBURNINGThe cost of the reconstruction was about $ 10 per 1 kW of the rated power unit capacity
11
700330
700
Before reconstruction
After reconstruction
Nx,mg/Nm3
330
1
700330
1
1200650900600920700600650650
550380450420650330350400300380380
Ekibastuzskaya GRES-2 (Kazakhstan)Tom-Usinskaya GRES (Russia)Novosibirsk CHP-5 (Russia)Belovskaya GRES (Russia)Tuncbilek Power Plant (Turkey)Scawina Power Plant (Poland)Gacko Power Plant (Bosnia)Novoirkutskaya CHP (Russia)Neivelly Power Plant (India)
700
330
1
00
00
00
00
00
00
00
0
0
Nx, /3
2
00
700
Before reconstruction
After reconstruction
Nx,mg/Nm3
330
3
00
RESULTS OF STAGE COMBUSTION SYSTEMS APPLICATIONMODEL RESEARCH Bituminous coalLignite
4
1200550
650380
900450
600420
920650
700330
600350
Novoirkutskaya CHP (Russia)400
Neivelly Power Plant (India)300
Nx, mg/nm3
1
700330
1
1200650900600920700600700650
550380450420650330350400300330380
Ekibastuzskaya GRES-2 (Kazakhstan)Tom-Usinskaya GRES (Russia)Novosibirsk CHP-5 (Russia)Belovskaya GRES (Russia)Tuncbilek Power Plant (Turkey)Scawina Power Plant (Poland)Gacko Power Plant (Bosnia)Novoirkutskaya CHP (Russia)Neivelly Power Plant (India)
1
00
00
00
00
00
00
00
0
0
Nx, /3
2
00
Before reconstruction
After reconstruction
Nx,mg/Nm3
330
3
THREE-STAGE COMBUSTION WITH GAS REBURNING ON BOILER TPE-214 AT NOVOSIBIRSKAYA CHP-5 POWER PLANT, RUSSIAMODEL RESEARCH 1 1-tier burners; 2 2-tier burners; 3 gas reburn burners; 4 OFA ports; 5 - control gate-valves on secondary air input ; 6 Venturi tubes; 7 natural gas flow-meter; 8 Venturi tube at recycle gas feeding to ports of reducing stage; 9 secondary air ports.Symbol1-tier burnersGas-fired burnersOFA level
RESULTS RECEIVED ON BOILER TPE-214 WITH REBURNINGMODEL RESEARCH
Vast experience accumulated by Russian power engineers in design and application of furnace and burner arrangements and fuel handling systems can be used worldwide to ensure efficient NOx abatementDeveloped concept of horizontally-and-vertically staged combustion was applied on many boilers firing a wide range of fuels, and it ensures 30-50% NOx reductionTechnology of horizontally-and-vertically staged combustion is a low-cost measure,at the same time, it is highly efficientLow-cost technological methods - first, and most efficient way to reduce NOx
