MARTIN reverse-acting grate

It is no art to generate waste -but to recover it, sustainably and with high efficiency, is.MARTIN Reverse-Acting Grate System –The Challenge of High Heating Value Fuels24.04.2006 NAWTEC 14May 1-3, 2006 – Tampa, FL1

Contents• Introduction• MARTIN reverse-acting grate• Fuel-bed temperature measurements• Water-cooled MARTIN reverse-acting grate• SYNCOM process• RDF trials• Summary / Conclusion24.04.2006 NAWTEC 14May 1-3, 2006 – Tampa, FL2

Range of heating values of untreated wastein different countriesP.Rep. of ChinaRep. of KoreaBrazilTaiwan, R.O.C.Rep. of SingaporeJapanEuropeU.S.A.SwitzerlandGermanyFranceScandinaviaPossible total range ofMARTIN reverse-acting grateup to 20,000 kJ/kg1,000 3,000 5,000 7,000 9,000 11,000 13,000 15,000 17,000 19,0002,000 4,000 6,000 8,000 10,000 12,000 14,000 16,000 18,000 20,00024.04.2006 NAWTEC 14May 1-3, 2006 – Tampa, FL3

MARTIN reverse-acting grate• Movement againstthe direction ofwaste flow• Uniform covering ofgrate• Protection againstintensive heatradiation• Protection againstthermal wear• Long service life24.04.2006 NAWTEC 14May 1-3, 2006 – Tampa, FL4

Fuel-bed temperature – measurements / modeling1917253341140049x31 x21 x11x32 x22 x12IR camera576573818997Temperature [°C]12001000800600400x33 x23 x13x34 x24 x14x35 x25 x15Temp FRInsertablethermocouples20000 1 2-1 2-2 3-1 3-2 4-1 4-2 5-1 5-2primary air zonesBall instrumentTemperature probes24.04.2006 NAWTEC 14May 1-3, 2006 – Tampa, FL5

Run 1Run 1Run 1Run 2Grate runRun 2Zone 2Zone 2Fuel-bed temperature – IR camera1000990980970960950940930920910900890880870860850840830820810800790780770760750740730720710700Run 3Run 3Run 3Run 2Run 1Run 1Run 1Run 26Run 2Zone 4Zone 4Zone 4Zone 3Zone 3Zone 3Zone 3Zone 3Zone 2Zone 2Zone 2Zone 2Zone 2Zone 1Temperature [°C]Grate zoneGrate runZone 4Zone 4Zone 4Zone 3Zone 3Zone 3Zone 3Zone 2Zone 224.04.2006 NAWTEC 14May 1-3, 2006 – Tampa, FLRun 2Run 3Run 3Run 3Grate zone

Fuel-bed temperature – Insertable thermocouples14001300TFEMK06 Thermocouple (T Brennbett zone Zone 2 2) TFEMK062 Thermocouple (T Brennbett zoneZone 3 3)120011001000Einschubtiefe:depth200 InsertionmmEinschubtiefe:Insertiondepth400 mmTemperature [°C]900800700600500Insertion Einschubtiefe: depth 300 mmInsertion Einschubtiefe: depth 200 mm40030020010007:00 8:00 9:00 10:00 11:00 12:00 13:00 14:00 15:00 16:00 17:00 18:00 19:00Zeit Time [hh:mm]24.04.2006 NAWTEC 14May 1-3, 2006 – Tampa, FL7

Comparison of IR camera andgrate bar temperature measurementsGegenüberstellung der IR-Kamera Aufzeichnungen der Zone 3von MVA A (20.11.03) und MVA B (05.10.04)1400Conventional, 13 MJ/kg / SYNCOM, 10 MJ/kg130012001100IR cameras1000Temperature [°C]Temperatur [°C]90080070060050040030020010005.10.04 MVA B20.11.03 MVA AGrate bars (average)000:00 02:00 04:00 06:00 08:00 10:00 12:00 14:00 16:00 18:00 20:00 22:00 00:00Time [hh:mm]Zeit [hh:mm]24.04.2006 NAWTEC 14May 1-3, 2006 – Tampa, FL8

Water-cooled MARTIN reverse-acting grate• Grate structure and reverse andforward movement are identical tostandard grate• Cooling segment is wider than anuncooled grate bar• Cooling water flows in parallelthrough all cooling segments• Sophisticated cooling system withsignificantly low losses• Cooling system can be switchedon and off in automatic modeduring plant operation24.04.2006 NAWTEC 14May 1-3, 2006 – Tampa, FL9

Water-cooled MARTIN reverse-acting grate –heat extraction by cooling water25,00020,00015,00010,0005,0000,00024.04.2006 NAWTEC 14May 1-3, 2006 – Tampa, FL1004:00:0504:20:0504:40:0505:00:0505:20:0505:40:0506:00:0506:20:0506:40:0507:00:0507:20:0507:40:0508:00:0508:20:0508:40:0509:00:0509:20:0509:40:0510:00:0510:20:0510:40:0511:00:0511:20:0511:40:05kWHeat extraction [kW]Time [hh:mm:ss]0.05% of thermal load

SYNCOM – processInfrared cameraFlue gascleaningUFA enrichment to24 - 35 % O 2Flue gasrecirculation• Grate-based system using theMARTIN reverse-acting grate• Combustion control systemusing infrared thermography• Overfire air system with 4nozzle rows (”4-row stitching”)• Flue gas recirculation• Oxygen enrichment ofunderfire air24.04.2006 NAWTEC 14May 1-3, 2006 – Tampa, FL11

SYNCOM - temperature measurements14001300120011001000Temperature [°C] .900800700600500400300LHV 9,000 kJ/kgAverage IR camera1,130°CGR1_Z1GR1_Z2GR1_Z3GR1_Z4GR1_AvGR1_GB2GR2_GB2GR1_GB4GR2_GB4GR1_GB6GR2_GB6GR1_GB8GR2_GB8UFA200100004:00 05:40 07:20 09:00 10:40 12:20 14:00 15:40 17:20 19:00 20:40 22:20 00:00 01:40 03:20Time [hh:mm]30/01/0624.04.2006 NAWTEC 14May 1-3, 2006 – Tampa, FL12

RDF trials – high heating value fuels13,000 kJ/kg5,589 BTU/lb17,000 kJ/kg7,309 BTU/lb19,000 kJ/kg8,169 BTU/lb24.04.2006 NAWTEC 14May 1-3, 2006 – Tampa, FL13

RDF trials – grate bar temperature measurements10080Temperature [°C] .604020T UFA54°C0T UFA14°C00:00 00:41 01:23 02:05 02:46 03:28 04:10 04:51 05:33 06:15 06:56 07:38Time [hh:mm]LHV13,000 kJ/kg 17,000 kJ/kg 19,000 kJ/kg24.04.2006 NAWTEC 14May 1-3, 2006 – Tampa, FL14

RDF trials – grate bar temperature measurements7060Temperature [°C] .50403020T UFA54°C → 14°C10NormalLHVLHVLHV011:30 00:00operation12:29 00:59 13:2913,00001:59kJ/kg14:29 02:5917,00015:29kJ/kg03:59 16:29 04:5919,00017:29kJ/kg05:59Front grate bar Grate step 4 Grate step 824.04.2006 NAWTEC 14May 1-3, 2006 – Tampa, FL15

Downtime analysis of COVANTA facilities withMARTIN reverse-acting grates7.053 boilers7,06,05.3168 grate runs[%]5,04,03,02,03.7Grate bar failureStoker equipment – I&CStoker system- Mechanical undefined- Feeders- Grates1,00,020030.620040.40.32005total downtimetotal hours24.04.2006 NAWTEC 14May 1-3, 2006 – Tampa, FL16

Summary / Conclusion• The SYNCOM process as well as the thermal treatment ofhigh heating value fuels on a MARTIN reverse-acting grateare possible unconditionally without additional cooling• Modifications to the general plant design of existing MARTINWTEs are not necessary; detail modification to the grate /boiler design may be necessary• The MARTIN reverse-acting grate is always covered with afuel bed or ash, and is thereby protected from excessivethermal radiation and intensive overheating• The MARTIN reverse-acting grate has a long service lifeThe MARTIN reverse-acting grate does not require water-cooling!24.04.2006 NAWTEC 14May 1-3, 2006 – Tampa, FL17

MARTIN®, MARTIN Rückschub® and SYNCOM® are registered trademarks in selected countriesThe MARTIN technologies described in this presentation are protected by patents in various countries24.04.2006 NAWTEC 14May 1-3, 2006 – Tampa, FL18

ContactsIf you have questions or want further information,please feel free to contact us atMARTIN GmbH für Umwelt- und EnergietechnikLeopoldstr. 248D – 80807 MünchenTel: +49-89-356 17 0Fax: +49-89-356 17 299E-mail: mail@martingmbh.deInternet: www.martingmbh.de24.04.2006 NAWTEC 14May 1-3, 2006 – Tampa, FL19