What differentiates Habla Zig-Zag Kilns from other technologies?
- A completely consistent kiln in design and operation.
- Efficient use of fuel reduces energy consumption.
- Efficient firing process.
- Offers almost complete combustion.
- Efficient use of generated heat, it is recycled in a continuous process.
- Design features: Long fire zone, roof, arch-less design, no tall chimney, scalable operating mode, power source flexibility, small construction footprint, easily mechanized.
- Significantly reduces CO2 and Black Carbon (soot).
- Improves health outcomes, working and living conditions of workers.
- Uses existing workforce.
- Significant fuel savings, increases profit.
- Lower construction costs.
- Low maintenance costs.
- Short payback period.
- Produces consistent, quality, saleable bricks increasing profits.
- Carbon credit generation.
- Significant foreign exchange savings as less imported coal is required i.e. Nepal and Bangladesh.
Clamp Kiln: An ancient primitive technology. This kiln is highly polluting, inefficient fuel use and labour intensive. Wide spread use in India and Africa. Operated only in intermittent mode.
Hoffman Kiln: Invented in Germany 1858. Designed with large, permanent masonry arches and expensive tall chimney approx. 30 metres tall. Kiln must operate in continuous mode.
Bull’s Trench Kiln-Movable Metal Chimney: Generally banned, still existent in places. Workers together move metal chimneys as the fire moves through the kiln. High emissions and hazardous working conditions.
Fixed Chimney Bulls Trench Kiln (FCBTK): Prevalent in South Asia (India, Bangladesh and Nepal) where pressure for low emission technology is mounting, due to highly polluted air and related health concerns. Has a tall expensive 30 metre chimney, highly polluting. Seasonal use only i.e. cannot be used during the monsoon. Operates only in continuous mode.
Tunnel Kiln: Has minimal emissions, mechanized/highly automated processes, expensive to construct, requires reliable power/electricity supply
Vertical Shaft Brick Kiln (VSBK): Reasonably fuel efficient, limited by a low throughput. Highly clay specific. Bricks carried via a ramp or steps to the top of firing shaft.
Cutting CO2 emissions in brick-making
The successful conclusion of the in-depth research study is a significant achievement for the Energy Efficient Clay Brick (EECB) Project, a CBA initiative funded by the Swiss Agency for Development and Cooperation (SDC) and implemented in South Africa by Swisscontact.