How to solve the explosion-proof problem? External faults of air heater manufacturers

How to solve the explosion-proof problem? External faults of air heater manufacturers

Is everyone's understanding of heating equipment still limited to ordinary heaters? In fact, more and more products are slowly emerging in the market. Compared with other heating equipment, explosion-proof air heater manufacturers have higher efficiency and have become the choice of more and more enterprises. If it is an explosion-proof air heater manufacturer and there is an external malfunction, what should I do? Let's get to know each other.

If there is external interference in the explosion-proof electric heater and the steady-state working condition is disrupted, the cascade control system will immediately start the control operation. According to the direction of the disturbance application point, the system has completed the temperature control function of the explosion-proof electric heater and the outlet water temperature control function of the explosion-proof electric heater. Selection of controlled variables and control variables: The controlled main variable is the outlet water temperature, the controlled auxiliary variable is the temperature inside the heater, the controlled main variable is the fuel valve opening, and the controlled auxiliary variable is the feedwater valve opening.

The explosion-proof electric heater temperature sensor adopts a platinum resistance PT1000 temperature sensor. Due to the stable physical and chemical properties in high-temperature and oxidizing media, platinum thermistors can be used as industrial temperature measuring elements with good linearity. At 0-100 ℃, the large nonlinear error is less than 0.5 ℃.

I choose a thermistor temperature transmitter as my temperature transmitter. The thermistor temperature transmitter can accurately measure the thermistor temperature signals PT100, PT1000, and cu50 output by the temperature sensor, and convert them into standard prepared analog signal outputs through blocking, transmission, and transmission. High precision, range and zero point can be continuously adjusted externally, stable, and with good performance. These two components are detection and transmission units.

For the control system of explosion-proof electric heaters, the outlet water temperature can be selected as the control parameter, and the fuel flow rate can be analyzed as the control variable. In short, this system also belongs to the temperature control system, with characteristics such as large lag, long pure lag time, large disturbance amplitude, and frequent and drastic load changes.

For production processes with chaotic dynamic characteristics, multiple or large disturbance fluctuations, and high control quality requirements, simple control systems cannot perform well, and heavy-duty explosion-proof electric heaters cannot meet the accuracy requirements of process control. Cascade control system belongs to chaotic control system, mainly used for production processes with large target capacity lag and long pure lag time, as well as controlled processes with large disturbance amplitude, frequent and drastic load changes. Therefore, cascade control system can be considered at this time.

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