2011 Landfill Operator s Conference. R. W. Beck, An SAIC Company 1

Transcription

1 2011 Landfill Operator s Conference January 25, 2011 R. W. Beck, An SAIC Company 1

2 MSW Landfill Degradation R. W. Beck, An SAIC Company 2

3 Background Information: MSW Landfills & Landfill Gas (LFG) Generation LFG is 50% methane & 50% carbon dioxide Methane is a recognized GHG with a global warming potential of 21 Federal regulations for controlling LFG emissions at larger landfills R. W. Beck, An SAIC Company 3

4 LFG Management Technologies & Markets Passive Venting and Treatment Passive Flaring Active Gas Collection with Flare Beneficial Re-Use Project Offset natural gas fuel by an industry Electricity generation Onsite Re-Uses Offset Landfill propane use Electricity generation for onsite use only Leachate evaporation or pond heating R. W. Beck, An SAIC Company 4

5 Passive Venting LFG vented directly to atmosphere R. W. Beck, An SAIC Company 5

6 Passive Flares Flare installed on passive vent Combusts LFG that is passively emitted from landfill through vent Passive gas flow ranging from 2 to 500 cfm R. W. Beck, An SAIC Company 6

7 Typical Gas Collection and Control System (GCCS) R. W. Beck, An SAIC Company 7

8 Blower/Flare Skid LFG is pulled from landfill and combusted in a flare Potential sale of carbon offset credits for voluntary project R. W. Beck, An SAIC Company 8

9 Beneficial Re-Use Medium Btu Direct Use Boilers, cement kilns, sludge dryers, infrared heaters Offset fossil fuel (natural gas, propane, etc.) use R. W. Beck, An SAIC Company 9

10 Beneficial Re-Use Electricity Generation Combust LFG in a generator Distribute electricity into local grid system May be part of a combined heat & power (CHP) cogeneration project R. W. Beck, An SAIC Company 10

11 Beneficial Re-Use Onsite use: LFG Fueled Boiler Offset propane or natural gas use R. W. Beck, An SAIC Company 11

12 Leachate Recirculation Collected Leachate Pumped Back to the Waste: Spray Application to Waste at Working Face Spray Application on Intermediate Cover (i.e. Compost) Infiltration Ponds/Cells Vertical Injection Wells Horizontal Trenches Granular Beds R. W. Beck, An SAIC Company 12

13 Short-Term Benefits Waste/Leachate Stability Leachate Volume Storage/Reduction Additional Leachate Treatment Enhanced LFG/GHG Accelerated Waste Settlement Airspace Recapture Permit/Construction Savings Leachate Management Savings R. W. Beck, An SAIC Company 13

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17 Leachate Recirculation Benefit of accelerating LFG production R. W. Beck, An SAIC Company 17

18 Recirculation to Energy (RTE) Utilizing energy from enhanced LFG generation at a small landfill not otherwise required to install an active collection system Converts gas to a productive reuse for energy generation and heat recovery; Reduces greenhouse and organic emissions; also reduces organics in leachate; and Provides a reliable source of renewable power at a reasonable price. R. W. Beck, An SAIC Company 18

19 Crow Wing County Landfill R. W. Beck, An SAIC Company 19

20 Background Opened in 1991 under Subtitle D rules Landfill accepts mostly municipal solid waste (MSW) Waste from nearby resort communities Commercial MSW Approximately 43,000 tons annually Four cells 22.5 total acres 1.15 million cubic yards of waste in place R. W. Beck, An SAIC Company 20

21 Background, continued Integrated public system Recycling Yard waste Demolition debris Household hazardous waste Industrial waste Leachate management Storage ponds capacity of over 4 million gallons Land application Recirculation R. W. Beck, An SAIC Company 21

22 Background History MSW Landfill Land application Closed, Lined Paper Mill Waste Monofill Closed, Unlined MSW Landfill Recirc pilot program, first in the state to be fully permitted? Flare Skid Recyclables Area Leachate Treatment Ponds Leachate Application Site Unlined Demolition Debris Landfill MSW = municipal solid waste HHW = household hazardous waste HHW Building R. W. Beck, An SAIC Company 22

23 GCCS Design Crow Wing County Began in December 2007/January 2008 Allow flexibility for future reuse Maximize gas collection in existing waste mass Install 10 dual-phase wells Includes pumps Leachate collection under drain cleanouts Cell 4 gas collection Recirculation lateral connections limited use Piping/Well Material Boiler R. W. Beck, An SAIC Company 23

24 GCCS Design, continued New storage building serve as location for future equipment Knockout pot designed for future reuse diversion Flare skid Additional control valve Additional diversion pipe R. W. Beck, An SAIC Company 24

25 Gas Collection And Control System (GCCS) Construction Began June 2008 Major GCCS components were complete by end of September Boiler installed in October/November 2008 Could not start up until start up of flare skid Flare skid installed and commissioned in November/December 2008 First ran on December 9 at about 350 SCFM and has stabilized around 250 SCFM SCFM = standard cubic feet per minute R. W. Beck, An SAIC Company 25

26 Typical GCCS Manifold Section with Lateral Connections R. W. Beck, An SAIC Company 26

27 GCCS Manifold Section with Cleanouts Prior to Burial R. W. Beck, An SAIC Company 27

28 GCCS Manifold Isolation Valve R. W. Beck, An SAIC Company 28

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30 Knock-out Tank and Condensate Sump R. W. Beck, An SAIC Company 30

31 Condensate Sump R. W. Beck, An SAIC Company 31

32 Gas Well Installation R. W. Beck, An SAIC Company 32

33 Gas Well Backfill R. W. Beck, An SAIC Company 33

34 Existing Gas Vent Converted to Gas Well R. W. Beck, An SAIC Company 34

35 On Surface Piping with Flexible Coupling R. W. Beck, An SAIC Company 35

36 Pipe Insulation R. W. Beck, An SAIC Company 36

37 Dual Phase Well with Electric Pump R. W. Beck, An SAIC Company 37

38 Electric Submersible Pump R. W. Beck, An SAIC Company 38

39 Typical Pneumatic Pump R. W. Beck, An SAIC Company 39

40 Typical Pneumatic Dual Phase Well R. W. Beck, An SAIC Company 40

41 DPW - Pneumatic R. W. Beck, An SAIC Company 41

42 Air Compressor for Pneumatic Pumps R. W. Beck, An SAIC Company 42

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44 Leachate Collection Underdrain System R. W. Beck, An SAIC Company 44

45 Leachate Collection Underdrain Water Trap R. W. Beck, An SAIC Company 45

46 Leachate Cleanout Connection R. W. Beck, An SAIC Company 46

47 Leachate Cleanout Connection R. W. Beck, An SAIC Company 47

48 Recirculation Lateral Connection R. W. Beck, An SAIC Company 48

49 Flare Skid Components Knockout Tank Valves Gauges Blower(s) Flow Meter Gas Analyzer Flare Stack Control Panel R. W. Beck, An SAIC Company 49

50 Flare Skid R. W. Beck, An SAIC Company 50

51 Vacuum Side Flare Skid Components R. W. Beck, An SAIC Company 51

52 Continuous Gas Analyzer R. W. Beck, An SAIC Company 52

53 Flare Skid w/ Gas Analyzer R. W. Beck, An SAIC Company 53

54 Gas Collection And Control System (GCCS) Operation Flare skid started in winter System bugs to work out Stabilize flow Boiler did not run the first winter Additional equipment and work required Pilot system changed to a continuous pilot for safety reasons Safety pressure switches R. W. Beck, An SAIC Company 54

55 GCCS Operation and Monitoring - Weekly Wellheads Flow/Pressures Methane & Oxygen Temperature Leachate flow if dual phase wells Leachate collection line cleanouts Flow, pressures, methane, oxygen Horizontal collectors/recirculation laterals Flow, pressures, methane, oxygen R. W. Beck, An SAIC Company 55

56 Methane Extraction System R. W. Beck, An SAIC Company 56

57 Handheld Gas Analyzer and Calibration Gases R. W. Beck, An SAIC Company 57

58 Device ID Date/Time CH4 CO2 O2 Balance %LEL Init. Static Press. Adj. Static Press. Init. Diff. Press. Adj. Diff. Press. Init. Gas Temp. Adj. Gas Temp. Init. Flow Adj. Flow Init. Power Adj. Power Baro. Press. Sys. Press. % % % % % inches H2O inches H2O inches H2O inches H2O DegF DegF Scfm Scfm BTU BTU inches Hg inches H2O GWSouth4 4/1/ : >>>> <<>> <<>> <<>> <<>> GWSouth5 4/1/ : >>>> GWWest01 4/1/ : >>>> <<>> 6 <<>> GWWest21 4/1/ : >>>> GWEast03 4/1/ : >>>> GWEast07 4/1/ : >>>> GWEast08 4/1/ : >>>> GWEast09 4/1/ : >>>> GWEast10 4/1/ : >>>> EastLCO5 4/1/ : >>>> <<>> <<>> <<>> <<>> EastLCO6 4/1/ : >>>> EastLCO7 4/1/ : >>>> EastLCO8 4/1/ : >>>> WestLCO1 4/1/ : >>>> WestLCO2 4/1/ : >>>> WestLCO3 4/1/ : >>>> WestLCO4 4/1/ : >>>> WestCO10 4/1/ : >>>> Well #4 Temp C Power Consumpti on (kwh) Hours # of Starts # # # # # # # # # CS#1 CS# CS# Gas Meter Report R. W. Beck, An SAIC Company 58

59 Landfill Settlement R. W. Beck, An SAIC Company 59

60 Adjustable Gas Piping R. W. Beck, An SAIC Company 60

61 Monitoring Flow and Temperature at Wellhead R. W. Beck, An SAIC Company 61

62 Monitoring System Vacuum and LFG Composition R. W. Beck, An SAIC Company 62

63 Monitoring Leachate Cleanouts and Adjusting Wellheads R. W. Beck, An SAIC Company 63

64 Dual Purpose Recirculation Lateral Connection R. W. Beck, An SAIC Company 64

65 Electric Pump Control Box and Monitoring R. W. Beck, An SAIC Company 65

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67 Flare Skid Monitoring Weekly System Vacuum Gas Temperature Gas Flow Methane & Oxygen Flame Temperature Nitrogen Propane R. W. Beck, An SAIC Company 67

68 Monthly Testing Report Date Outside Temp F Vacuum Inches Oxygen % Volume Methane % Volume Flare Temp F Flow Total Flow Boiler Boiler Run Hours scfm Boiler Total cfm Calibration 50% CH4 & 0/2 Before Calibration 50% CH4 & 0/2 After Comments/Actions Taken ,586, , / / 0.0 Comment (field cal. landtec meter) Bump test O.K ,632, , / 0.0 ( Comment ) Bump test O.K ,519, , / 0.0 ( Comment ) Bump test O.K ,332, , /0.1 ( Comment ) Bump test O.K ,377, , / 0.1 ( Comment ) Bump test O.K ,185, , / 0.1 ( Comment ) Bump test O.K N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Closed on X-mass ,069, , / 0.2 ( Comment ) Bump test O.K ,207, , / 0.3 ( Comment ) Bump test O.K. R. W. Beck, An SAIC Company 68

69 Flare Skid Maintenance Blowers - Monthly Flow verification checks Typically quarterly Knock-out tank Gas analyzer calibration Handheld Continuous R. W. Beck, An SAIC Company 69

70 Flow Meter Calibration R. W. Beck, An SAIC Company 70

71 Control Unit R. W. Beck, An SAIC Company 71

72 Typical Blower Maintenance R. W. Beck, An SAIC Company 72

73 Nitrogen Valve and Propane Cylinder R. W. Beck, An SAIC Company 73

74 Landfill Flare Auto-dialer R. W. Beck, An SAIC Company 74

75 LFG-Fueled Boiler R. W. Beck, An SAIC Company 75

76 Boiler Components Gas inlet piping Scrubber Automatic shut-off switches Flow meter In-floor heat circulation system R. W. Beck, An SAIC Company 76

77 Pressure Side Flare Skid Components R. W. Beck, An SAIC Company 77

78 Landfill Gas Boiler Corrosion R. W. Beck, An SAIC Company 78

79 Particulate Scrubber R. W. Beck, An SAIC Company 79

80 Questions? ANDY FREY Project Engineer R. W. Beck FRED DORAN, P.E. Senior Engineer R. W. Beck MARV STROSCHEIN Landfill Operator R. W. Beck, An SAIC Company 80