Schematic illustration of the technology

COMPENDIUM OF WASTE ORGNICS CONVERSION TECHNOLOGIES

Conversion into Liquid & Gas Fuel or Electricity.

Liquid Fuel Production / Pyrogas Production

Main features

Feed 1. All plastics (thermoplastics, thermosetting, halogen-containing)
2. All Biomass(dry, wet, vegetable, animal, microbe)
3. Mixture of plastics ,biomass, metal, asbestos, microbe etc.
Processes Pyrolysis
Main equipment Rotary kiln equipped with the screen for solid circulation.
Special features Continuous operation and rapid heating by internal circulating of solids.
External or internal heating by heating medium.
Main product Liquid and gaseous hydrocarbons

Image of test plant

Image of test plant

Photo 1 Gasification Plant in Iwaki city (Copyright OSTRAND)

Technical description

As shown in figure 1, our system of thermal decomposition for organic wastes consists of a hopper, feeder, rotary reactor, condenser, gas refiner, oil (gas) storage tank and dual fuel engine generator.

Figure 1 Schematic diagram of a typical plant

Figure 1 Schematic diagram of a typical plant

Specification of pyrolysis plant

Plant capacity 200 kg/h
Input (Raw materials) Mixture of plastics (30.7%), biomass (60.8%) and others (8.5%)
Bulk density 500 kg/m3
Output (Products) Gaseous products 80 – 100 Nm3/h; 20,900 – 25,100 kJ/Nm3
( Electricity 120kWh/h)
Char 20 – 30 kg/h
Kiln Dimensions Inner vessel     1,000 mm outer diameter x 3,540 mm length
( Equipped with solid circulation system installed.)
Outer vessel     1,382 mm outer diameter x 2,600 mm length
Feed Screw feeder     200 mm outer diameter x 1,300 mm length
Water-cooled; nitrogen-gas sealed
Utility Nitrogen gas: 20 Nm3/h for sealing at dumper and screw feeder
Chilled water: 50 L/h
( Power: 5.7 kWh/h is supplied by C-POWER itself)

Typical operating results based on a pilot plant

Mixed plastics & municipal solid waste were pyrolyzed at the pilot plant shown in Photo 2.

Outlook of the pilot plant

Photo 2 Outlook of the pilot plant

1.Operation     Mixed plastics (Higher calorific value 9,519kcal/kg-dry base)

The components of mixed plastics used as feedstock and the typical operating results are shown in Tables 1 and 2 respectively.
Operating conditions included a temperature of 700 degrees Celsius and feeding rate of 20 kg-plastics/h.

Table 1     Contents of three elements of mixed plastics

  Moisture Ash Combustibles Total
wt% 1.04 2.19 96.77 100

Table 2     Element of Combustibles (Dry base)

Ash Combustibles Elemental analysis Total
C H N O S Cl
2.21 97.79 73.8 12.9 1.11 9.86 0.03 0.09 100

Table 3     Output: Gas, Oil, Char (by pilot plant 20kg/hr)

  wt% Remarks notes
Gas 87.9 Calorific value: 10.630kcal/Nm3
Heavy tar 5.8 Boiling temp: >more than150oC
Light tar 4.6(3.3*) Boiling temp: 150-50oC
Char 1.7  
Total 100.0  

*water content

2.Operation     Municipal solid waste

Dry MSW was heat resolved, and a combustible gas, the tar, and Char were obtained.

Table 4     Contents of municipal solid waste (original sample)*

  Water Ash Combustible Total
wt% 45.8 5.6 48.6 100

*Higher calorific value 11,700 kJ/kg-wet base, 21,500 kJ/kg-dry base

Table 5     Contents of municipal solid waste prepared as RDF (dried sample)*

  Water Ash Combustible Total
wt% 2.9 13.1 83.9 100

*Higher calorific value: 20,000 kJ/kg-dry base

Table 6     Elemental composition

Analytical results of six elements, (wt%) Subtotal Other Total
C H N O S Cl
44.7 6.7 0.9 31.9 0.0 2.6 86.9 13.1 100

*Higher calorific value: 20,000 kJ/kg-dry base

Table 7     Output : Gas, Oil, Char (by pilot plant 20kg/hr)

  wt% Remarks notes
Gas 52.5 23800 kJ/Nm3
Heavy tar 2.8  
Light tar 29.1(14.9*)  
Char 15.6 Organic: 3.3, Inorg.: 12.3
Total 100  

*Water content

PageTop