Working principle and precautions for airway electric heaters

The control system of the export water temperature of the air duct electric heaters, we can choose the water outlet temperature to be charged, and the fuel flow is controlled variables to analyze. The system is also attributed to the temperature control system, with a large lag, the lag is long, the perturbation is large, the load changes frequently, but also violently. The inner high voltage system of the airway electric heater can provide a heater to the DCS system in operation, high temperature, fault, and stop, etc., or accept the automatic, stop operation of DCS. Electric heater, if the external disturbance is present, so that the steady state conditions are damaged, the cascade manipulation system is immediately operated. According to the orientation of the disturbance application point, the system completes the function of the control of the temperature in the explosion-proof electric heater, and completed the function of the export water temperature control of explosion-proof electric heater. The controlled variable, the control variable is selected by the control master variable as the export water temperature, the controlled sub-variable is the temperature in the heater, the control main variable is the opening degree of the fuel valve, and the control sub-variable is the opening degree of the water valve. Picking temperature sensor for explosion-proof electric heater selection temperature sensor platinum resistance PT1000. Since the physical chemical function of the platinum thermal resistance is very stable in high temperature and oxidative media, it can be used as an industrial temperature measurement element, and this element is preferably linear. At 0-100 degrees Celsius, the upper nonlinear error is less than 0.5 degrees Celsius. Electro-heating is a process of converting electrical energy and converting to thermal energy. Since finding the power supply is a thermal effect through the wire, there are many inventors in the world to engage in research and manufacturing of various electric thermostats. The development and popularization of electric heating is the same as other industries. It generally follows such a room heater
law, from advanced electric heater to the world’s countries; gradually develop from the city to rural areas; Develop to the family, then to individual; products are generally developed by low-end. The electric heater is installed on a fixed bracket with a stainless steel electric heating tube outer tube. The wind tube electric heater can be inlated into the air or static pressure box. The power supply can be dissipated and the heat efficiency is high, and the heat is well dissipated. The heat is well dissipated, the service life is long, safe and reliable, the unit itself is equipped with a high temperature overheating protection device, set The temperature is automatically powered off when the temperature is reached at 95 ° C, and the heater is reached when the temperature value is reached. The airway electric heater is installed on a fixed bracket with a stainless steel electric heating tube outer fin. The wind tube electric heater can be inlated into the air or static pressure box. The power supply can be dissipated and the heat efficiency is high, and the heat is well dissipated. The heat is well dissipated, the service life is long, safe and reliable, the unit itself is equipped with a high temperature overheating protection device, set The temperature is automatically powered off when the temperature is reached at 95 ° C, and the heater is reached when the temperature value is reached. The airway electric heater is a stainless steel pipe, a tie threaded fin, lateral arrangement, mounting, and air tube electric heater for easy repair, group control. Several sets of heating tubes were arranged in a few layers to increase the heat exchange rate and improved the heating effect. The casing is in the frame, and the outer casing uses high quality galvanized sheets.