Energy and Environment related technologies and solutions:

C-POWER Plant, SH Dryer (SHD)

Company data

Name OSTRAND Corp.
Address 1-21 Yotsuya Shinjyuku-Ku Tokyo Japan
Capital 25 million yen
Contact person Akimichi Hatta
Telephone +81-3-3225-0261 Fax +81-3-3225-0475
E-mail hatta@ostrand.co.jp
Number of employees 7
Date of company foundation 9th Sep, 1976
The type of business  Process Design & Engineering for Waste To Energy (WTE)

International operation

Number of employees for international operation 1
Overseas offices* City , Country Name of company
   
   
   
   

* Overseas offices of alliance members and/or consortium members are also accepted.

Modality of business transaction

Mark, if applicable Mode of business Brief description
  Direct Investment  
Partnership Arrange partnerships in WTE business & WTE process engineering
Export of product  
Licensing of patent  

Technology data

Name of technology 1) C-POWER Plant
2) SH Dryer (SHD)
Field of the technologyMajor category:
Waste treatment and management		 Sub-category:
Production process,
Municipal solid waste
Conceivable applications Waste disposal and Energy production
Waste: Municipal Solid Waste (MSW), Biomass, Plastics, and Every kind of organic waste
Energy: Electricity, Fuel-gas, and Heat
Performance 1. C-Power plant
The electricity generating process based on current technologies is to incinerate MSW, generate high-pressure steam, rotate the turbine, and generate electricity.
These technologies require:
a. MSW of 100 tons or more a day
b. Dioxine treatment process
c. Qualified persons handling high-pressure gas
d. Lower steam temperature ( leads to lower power generation efficiency below 20% for MSW of 100 tons)

C-POWER technology thermally decomposes MSW, generates the fuel gas, rotates the engine, and generates electricity.
This technology has the following advantages:
a. MSW of five tons a day is enough to operate plants
b. The Dioxine treatment process is unnecessary
c. A special qualification person is unnecessary
d. Higher power generation efficiency around 30%

2. SH Dryer (SHD)
Current dryer technologies need:
a. The hopper and the feeder besides the dryer
b. The deodorization equipment
c. Fuels such as oil and natural gas for drying

SHD has the following advantages:
a. Because hoppers, dryers, and feeders for a plant are integrated, the cost of a plant is low.
b. The deodorization equipment is unnecessary.
c. The fuel for drying is unnecessary.
Technical maturity 1. C-POWER plant
1985 - Bench scale plant of pyrolysis
2000 Invention of Rotary Reactor (U-turn kiln)
2004 Pilot plant (20kg/h)
2006 Test plant (200kg/h)
2010 Commercial plant ( Biomass 2,000t/y)
2. SH Dryer
2009 Invention
2010 Commercial plant
Competitive advantage Performance
  • More than 80% energy recovery ratio
    (= Net produced energy / energy contained in waste)
Identification of competitive technology
  • Landfill & Incinerator
  • Power generation by steam turbine
Conceivable risk Fluctuation of waste collection
Information on patent related to this technology  

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 a typical commercial 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



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 vessel1,000 mm outer diameter x 3,540 mm length
( Equipped with solid circulation system installed.)
Outer vessel1,382 mm outer diameter x 2,600 mm length
Feed Screw feeder200 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.


Photo 2 Outlook of the pilot plant


1.OperationMixed 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 1Contents of three elements of mixed plastics

  Moisture Ash Combustibles Total
wt% 1.04 2.19 96.77 100

Table 2Element 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 3Output: 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.OperationMunicipal solid waste
Dry MSW was heat resolved, and a combustible gas, the tar, and Char were obtained.

Table 4Contents 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 5Contents 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 6Elemental 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 7Output : 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