Energy Recovery from Waste Plastics
Horticulture Research Farm Field Day Notes
PENN STATE UNIVERSITY - AGRICULTURAL SCIENCE Program.
1. Plastic-derived fuel (PDF)
Cost to produce pellets: $0.08–0.11/lb.or $160-220/ton ($0.18-0.24/kg)
Cost to purchase pellets: $0.14-0.16/lb.or $280-320/ton ($0.30-0.35/kg)
Rule of thumb:
Plastic densification costs 2X cost to landfill.
2. The Boiler
Manufacturer: GR Technologies Company, Ltd., Seoul, Korea
Boiler type: Circulating hot water (not steam)
Dioxin (PCDD/F) emissions: 0.119 ng-TEQ/sm3 @ 12% O2 (US EPA allows 5.0 ng-TEQ/sm3) as confirmed by Korea Testing Laboratory
Projected unit cost: $17,000
Preheat: 1.5 liters/ 10 minutes with kerosene or diesel fuel for 15 minutes. Kerosene + plastic runs+ for 20 seconds together, then totally plastic thereafter.
Combustion chamber: Burns PE or PP; PS & ABS require 50% barrel length increase
Rated capacity: 100,000 kcal/hr.(396,850 Btu/hr.) on 9 kg/hr.(19.8 lb/hr.) with 11,500kcal/kg (20,686 Btu/lb) plastic fuel pellets
Plastic fuel feed rate range: 9-15kg/hr.
Current plastic fuel feed rate: 13 kg/hr. (28.6 lb/hr.)
Thermal efficiency: 75%; at 150oF water, thermal efficiency goes to 89%
Combustion chamber: 900-1100oC (1652-2012oF)
Boiler cut-in temperature: 60oC (140oF)
Boiler cut-out temperature: 80oC (176oF)
Boiler heating cycle: 5 hrs. comprised of 2 hrs. burning & 3 hrs. circulating
Boiler heating rate: 1 ton water requires 45 minutes heating time (entire heating system will hold 3 tons water with 2 hours heating time)
Power needs: 4 kW@ 110 vac with 208 vac for vacuum fuel supply
Future boiler: 2,000,000 kcal / hr. (7,937,000 Btu / hr.)
Korean contact: Mr. William Bang, GR Technologies Company, Ltd., 201, Samsung Anytel Building, 837-17 Yeoksam-dong, Kangnamgu, Seoul,135-937, Korea
[Ph: 82-2-3452-9159; Em:email@example.com ]
U.S. Contact: Mr. James W.Garthe, Penn State Univ., Dept. of Agricultural & Biological Engineering, 246 Agricultural Engineering Building, University Park, PA 16802
[Ph: 814.865.7154; Em: firstname.lastname@example.org]