Energy Globe World Award 2017

Finalist in the category Fire


Project:
Biomass Gasification to reduce Lime Kiln Fossil Fuel Oil
Submitted by:
Phoenix Pulp and Paper Public Company Limited (SCG Packaging)
Country:
Thailand


In order to follow their sufficient economy philosophy, PPPC uses a concept to manage their energy consumption for sustainable business by depending on their own biomass fuel, reducing purchased fossil fuel and living in harmony with the community and environment.

Initial situation
The company has 2 lime kilns which were originally designed for approximately 36,000 kiloliters of fuel oil per year to produce calcium oxide. With the increasing fuel oil price in the year 2012, the variable costs increased and the profit margin decreased. In addition, high consumption of fuel oil generated a higher amount of greenhouse gas. Biogas from waste water has been widely applied; however, the waste water quality of the PPPC plant is not suitable for the biogas production. The characteristics of eucalyptus as fibrous material can cause congestion during processing. Also, high costs of drying the eucalyptus are a problem.

Solution
The biomass gasification project of Phoenix Pulp and Paper Public Company Limited (PPPC), affiliated with SCG Packaging in Thailand, a leading integrated producer of pulp, paper and packaging products, was started in 2014 aiming to reduce fossil fuel oil energy consumption at lime kilns, which are key machines operating for the pulping process. The eucalyptus biomass waste from the pulping process is fed to the rotary dryer to reduce its moisture from 60% to 25%, and then is combusted in a gasification reactor with a temperature about 850 oc to generate synthetic gas comprising CO, H2 and CH4. Finally, synthetic gas is sent to lime kilns through the insulated duct to substitute fossil fuel oil at lime kilns.

Innovation
This biomass gasification plant is the only one in the world using eucalyptus bark while others use fuels easier to handle such as coal, saw dust, wood pellet and rice husk. PPPC modified the conveying system especially for the processing of eucalyptus. The screw feeder has become the innovation of the pressurized gasification reactor type to protect pressure leakage back from the reactor. This makes the system suitable for the processing of fibrous eucalyptus bark to prevent congestion during the conveying process. The raw material, eucalyptus bark and wood residues, come from expanded pulping capacity. This project concept and technology can be transferred to other pulp manufacturers in Thailand, as well as other countries, which use eucalyptus wood as raw material.

Fire

Fire
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