High-temperature Exhaust Gases Heating of Hot Water in Boiler by Finned Coil Heat Exchanger

High-temperature exhaust gases pass through the finned coil heat exchanger to heat the hot water in the boiler.

High-temperature exhaust gas flows outside the finned coil heat exchanger, and the large amount of heat energy it carries is transferred to the hot water in the boiler through the fins and the wall of the coil. The presence of fins increases the heat exchange area and strengthens the heat transfer process, so that the heat in the exhaust gas can be transferred to the hot water more efficiently, thus increasing the temperature of the hot water and realizing the recycling of heat energy.

Advantages

Efficient heat transfer: the design of fins greatly increases the heat exchange area and improves the heat transfer efficiency, which can fully utilize the heat energy in the high-temperature exhaust gases and effectively raise the temperature of the hot water in the boiler and save energy.

Compact structure: the finned coil heat exchanger has a more compact structure, covers a small area, and can be easily installed in boiler rooms and other places with limited space, and can be flexibly arranged according to the actual site and process requirements.

Corrosion resistance: usually made of corrosion-resistant materials, such as stainless steel, etc., can adapt to the various corrosive components of high-temperature exhaust gas to extend the service life of the equipment and reduce maintenance costs.

Precautions

Regular cleaning: The high temperature exhaust gas may contain dust, particles and other impurities, which may accumulate on the surface of fins and coils in long-term operation, affecting the heat exchange efficiency. Therefore, the heat exchanger needs to be cleaned regularly, which can be done by compressed air blowing and high-pressure water flushing.

Prevent dew-point corrosion: pay attention to the control of the operating temperature of the heat exchanger, to avoid the acidic gases in the exhaust gas condensation in the low-temperature parts, resulting in dew-point corrosion. It can be ensured that the tube wall temperature is higher than the dew point temperature by rationally designing the structure of the heat exchanger and adjusting the operating parameters.

Monitoring and maintenance: install temperature, pressure and other monitoring instruments to monitor the operating status of the heat exchanger in real time. Abnormalities found in a timely manner for maintenance and processing, such as checking whether there is leakage in the pipeline connection parts, whether there is damage to the fins, etc., in order to ensure the normal operation of the heat exchanger and efficient heat transfer.