Principles of operation and applications of biomass-fired fluidized bed boiler

GENERAL DOCUMENTS

Principles of operation and applications of biomass-fired fluidized bed boiler

DIVI Group proudly introduces its cutting-edge biomass-fired fluidized bed boiler technology. This revolutionary system is designed to efficiently convert a variety of biomass materials into renewable energy, demonstrating compatibility with both biomass and traditional fossil fuels.

Fuel Compatibility and Preparation

Our innovative boiler system can process diverse biomass fuels including rice husks, chopped firewood, sawdust, cashew shell residues, and coffee husks. It also seamlessly integrates with coal, offering flexibility in fuel choice. The journey of the fuel from the conveyor hopper in the fuel warehouse to the boiler's furnace is meticulously engineered for efficiency and environmental friendliness.

Operational Mechanism

1. Initial Stages

Fuel is transported from the warehouse to the furnace where a sophisticated air feed system ensures even distribution over the grate for optimal combustion.

2. Combustion and Steam Generation

In the furnace, fuel combustion occurs under controlled conditions, generating hot smoke that passes through a steam generator tube, contributing to approximately 60% of the steam generation through radiant heat exchange. The system incorporates an ash recycling process to ensure complete combustion and reduce waste.

3. Enhanced Combustion and Efficiency

A secondary level of ventilation introduces additional oxygen, optimizing combustion and minimizing CO emissions. The hot smoke then moves to the boiler body, where it heats water in tubes, creating steam through convection heat exchange and achieving around 40% of steam generation.

Heat Optimization and Exhaust Management

To maximize efficiency, the boiler employs a water economizer and an air preheater, which preheat water and air respectively, enhancing the overall system efficiency to an impressive 89%. The process includes advanced ash removal mechanisms and a comprehensive exhaust management system to ensure environmental compliance and operational cleanliness.

Additional Features for Operational Excellence

De-aerator Tank: Reduces oxidation by removing oxygen from feed water, protecting the boiler's metal components.
Water Management: A high-pressure pump system ensures continuous water supply, supported by a water treatment system to meet quality standards. In scenarios requiring additional heating, a secondary water economizer is employed.
Steam Distribution: A steam header collects and distributes steam, featuring a drying function for enhanced production process efficiency.

Conclusion

With nearly 200 successful implementations across Vietnam, DIVI Boiler's biomass-fired fluidized bed technology stands as a testament to our commitment to renewable energy and environmental sustainability. Meeting international standards and agreements, our technology paves the way for a greener future, aligning with global efforts towards sustainable development.

We welcome feedback and discussions on our technology as we strive for continual improvement and innovation. At DIVI Group, we are dedicated to bringing prosperity through green energy, embracing our role as pioneers in the renewable energy sector.