Composite phase change heat exchanger technology "is a practical and efficient energy-saving technology that can be used for the recovery and reuse of waste heat from exhaust gases such as boilers. It can significantly reduce the exhaust gas temperature while maintaining a high level of pipe wall temperature at the tail of the heat exchanger (only 15 ℃ -20 ℃ lower than the exhaust gas temperature), away from low-temperature dew point corrosion zones;
The core connotation of composite phase change heat transfer technology is summarized as follows:
In the design and renovation of boilers, the emission temperature of flue gas can be significantly reduced, allowing a large amount of medium and low temperature heat energy to be effectively recovered, resulting in significant economic benefits; While reducing the exhaust temperature, the wall temperature of the metal heating surface is kept at a relatively high level, away from the corrosion area of the acid dew point, fundamentally avoiding condensation corrosion and the resulting ash blockage, greatly reducing the maintenance cost of the equipment;
The low wall temperature of the metal heating surface of the heat exchanger has been achieved in a controllable and adjustable state, enabling the composite phase change heat exchanger to have considerable adjustment ability, keeping the exhaust gas temperature and wall temperature relatively stable, and adapting to changes in the fuel variety and load of the boiler;
While retaining the efficient heat transfer characteristics of heat pipe heat exchangers, the aging problem of phase change heat exchangers can be effectively solved through gas exhaust operations, greatly extending the service life of the equipment.
