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Published byPeyton Mercer Modified over 9 years ago
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Plasma Arc (PLASCON)
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Status & POPs application “In-flight” plasma arc PLASCON technology operating commercially since 1992. 9 commercial plants operating: 4 commercial 150 kW PLASCON units operating in Australia. 2 units Agricultural Chemical industry, which treat the liquid waste stream from 2,4 D manufacture 4 plants in Japan for PCB destruction 1 plant United Kingdom for fire retardants, ODS POPs application: Pesticides such as HCB, DDT, Aldrin, Dieldrin, Lindane, 2,4 D, PCBs, Dioxins, furans and other compounds such as halons and chemical industry in-process waste streams
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12 CO 2 DESTRUCTION OF TYPICAL PCB WASTE PLASMASPECIES FLIGHT TUBE SPECIES DISCHARGEPRODUCTS HEXACHLORO-BIPHENYL 6 O 2 Pyrolysis 12 C atoms 12 O atoms 4 H atoms 6 Cl atoms 12 CO 4 HCl + Cl 2 ClCl Cl ClCl ClCl ClCl 6 NaCl 5 H 2 O 0.5 O 2 Quench 6 NaOH ThermalOxidation
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PLASCON TORCH & FLIGHT TUBE Argon Anode Temp’ (C) 10,000 7,500 5,000 2,50012,500DC+ Waste FLIGHT TUBE Cooled Liner DC- Cathode PLASMA
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PLASCON Process Flow sheet
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PART I - Adaptation Technology – Country A. Performance: 1. Minimum pre-treatment: only treatment gaseous and liquid streams 2. Destruction Efficiency: Pesticides, PCB’s > 99.9999 % Japan: 99.999999 %
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PART I: Adaptation Technology - Country A. Performance: 3. Toxic by-products: --- 4. Uncontrolled releases: --- 5. Capacity to treat all POPs: yes 6. Throughput: Quantity [tons/day, l/day] S tandard units: 1-3 tons /day Examples: 5% DDT in 95% solids (lime, talcum powder) Plascon can treat about 20 ton per day after desorbtion. 25 % DDT in 75% Toluene then Plascon can treat 1 ton per day.
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PART I: Adaptation Technology - Country A. Performance: 7. Wastes/residuals: Secondary waste stream volumes: no waste streams, 0.5 Nm3 /h (79% Ar, 18.5 % CO2, 2% CO) Off gas treatment: none after flare Complete elimination: yes
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PART II: Adaption Country – Technology A. Resource needs: Power requirement: 150 kW plasma torch (POPs) - Total 180 kW Water requirements: Cooling torch 1.4 m3/h Fuel volumes: no fuel Reagents volumes: Ar 15m3/h, O2 0.8 t/t conc waste, 30-60% caustic soda 1.4 t/t conc w Weather tight buildings: yes but ventilated Hazardous waste personnel requirement:--- Sampling requirements/facilities: --- Peer sampling: --- Laboratory requirements: --- Communication systems: --- Number of (un/skilled) personnel required: ---
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PART II: Adaption Country – Technology B: Costs for: Operating costs US$ 2/kg pure PCB Installation + commissioning: Site preparation: Energy & Telecom installation: Compliance: Reporting: Run without waste: Run with waste: Decommissioning: Landfilling: Transport residues:
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PART II: Adaption Country – Technology C. Impact & D. Risks Discharges to air: Discharges to water: 1m3/h with 50 g NaCl, 5 g Na CO3 Discharges to land: none Risks reagents applied: very few Risks of technology: fully automated PLC controlled Operational risks: E-powered shut down instantaneously
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PART II: Adaption Country Technology E. Constructability & F. Output Ease of installation & construction of plant : Ease of shipping/transit: Ease of operation: Ease of processing: Generated waste (% of input waste): Deposited waste at landfill (% of input waste): Waste quality properties (pH, TCLP)
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PLASCON- ODS Unit
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Australia plant (for Queensland Government): 200 tonnes of banned pesticides treated after a farm collection campaign.
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PCB Contaminated Transformers 3 phase Transformer out of the tank three stripped windings Laminations
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PLASCON New UK Unit
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On site monitoring Gaschromatograph fitted with a Mass Spectrometer Detector Gaschromatographs fitted with Electro Capture Detectors (ECD) And auto samplers for liquids
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Excellent DE Argon use Handles all wastes Easy handling + easy set up Low footprint Liquids or gaseous streams only (liquid <0.5 mm size) Low emissions Simple gas treatment Relative costly to operate Portable High power use Minimum operators Strength’sWeaknesses
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