What are the functions and types of an air preheater?
An air preheater uses heat from boiler exhaust gases to warm the incoming air.
Its primary functions include:
- Lowering the flue gas temperature, thereby improving boiler efficiency.
- Raising the furnace temperature, enhancing fuel ignition and combustion, and reducing losses from incomplete combustion.
- Saving metal materials and reducing the construction cost of the boiler.
- Drying coal powder, which supports the pulverizing system’s operation.
- Lowering flue gas temperature, improving the induced draft fan’s working conditions.
The two main types of air preheaters are tubular and rotary.
Tubular air preheaters are typically used in small to medium boilers, while large boilers mainly use rotary air preheaters with heating surfaces.
What are the functions and types of an economizer?
An economizer uses heat from boiler exhaust gases to warm the boiler feedwater.
Its primary functions include:
- Saving fuel.
- Reducing boiler costs.
- Improving the working conditions of the steam drum.
Economizers are categorized into boiling and non-boiling types based on the output fluid’s state.
Boiling economizers are typically used in medium and low-pressure boilers, while non-boiling economizers are used in ultra-high pressure boilers and above.
Conclusion
The air preheater and economizer are essential components for enhancing boiler efficiency. The air preheater boosts combustion efficiency by preheating the combustion air, while the economizer reduces the boiler’s thermal load and flue gas temperature by preheating the feedwater. These components are typically used together in a boiler system to maximize the recovery of waste heat from flue gases, thereby improving overall energy utilization efficiency.
About Us
Shandong Bokk Tech is dedicated to solve the problem such as ash blockage, corrosion and excessive exhaust gas temperature in the tubular air preheater of small and medium-sized boilers. We primarily manufacture automatic cleaning devices for tubular air preheaters and corrosion-resistant heat pipes. Our products are widely used in the thermal power plants, chemical plants, new energy sector, etc.
We offer customized services to customers around the world, allowing us to adjust product dimensions and other specifications based on your specific needs, to improve air preheater heat efficiency.
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