Tubular electric heaters have two working principles:
The first method is to heat the air before it is treated with water. This method is usually used when the temperature is low in winter, and is usually called first heating or preheating. Its purpose is to increase the enthalpy of fresh air, reduce humidity and increase the humidification capacity of outdoor air in wastewater room, so as to increase the percentage of fresh air and meet the sanitary requirements. The heater used by tubular electric heater is called preheater, and its position is set at the air outlet end of fresh air chamber.
The second is to heat the air after water treatment, which is usually called secondary heating or reheating. Its main purpose is to compensate for the lack of heat in the workshop.
The heater used is called reheater, which is usually set behind the water baffle in the spray booth. Although both preheater and reheater are used to heat air, their functions are not exactly the same, so they cannot be confused and replaced, otherwise the air state in the workshop will change.
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