How a graphite heat exchanger works

Graphite heat exchanger has a wide application prospect in the field of high temperature waste gas and waste liquid cooling due to its small volume and remarkable cooling effect. Due to the lack of sufficient knowledge of graphite heat exchanger, it is easy to ignore some key points in practical application. Based on practical design and installation practice, this paper introduces the working principle and internal structure of graphite heat exchanger in detail, and lists the aspects that must be considered seriously in practical use.

Working principle of graphite heat exchanger

When the high-temperature exhaust gas passes through the graphite heat exchanger, the graphite nozzle sprays a large amount of cooling liquid in two layers. withstand temperature. Under normal working conditions, the coolant is provided by the circulating pump. If the circulating pump cannot provide enough coolant in an emergency situation, the thermal oxidation furnace system at the front end of the graphite heat exchanger will automatically stop, and the emergency water supply will be started at the same time to eliminate the residual heat inside the system and protect the equipment at the back end.

The supply of cooling liquid inside the graphite heat exchanger is divided into three paths. Two of the cooling liquids are sprayed from the nozzle and directly contact the high-temperature gas, reducing the temperature of the exhaust gas through evaporation; the other cooling liquid circulates between the inner and outer walls of the graphite heat exchanger to reduce the temperature of the inner and outer walls of the heat exchanger to protect the graphite heat. The exchanger itself will not be damaged by excessive temperature.

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