How to measure the temperature of an electric boiler?

2021-02-21 10:29:03

The temperature of the furnace is generally automatically controlled by the electric boiler temperature in order to meet the needs of the heat treatment process and to stabilize the electric boiler temperature in a given temperature range. According to the error of the furnace temperature to the given temperature, the furnace supply is automatically turned on or off. Heat source energy, or continuously change the size of the furnace temperature and heat source energy to stabilize, then do you know how to measure the temperature of an electric boiler?

The temperature of the electric boiler is measured according to the temperature to do PID control heating tube detection, use PID to adjust the incineration valve, after adjusting the valve opening, to adjust the incineration or control the temperature, the heating electric boiler of the electric boiler uses electric heating to operate, and the heater generates The heat is proportional to the square of the voltage control unit of the voltage regulator. The height of the control unit is controlled by the position of the sliding contact of the voltage regulator. This contact is driven by a reversible DC motor. The electric boiler temperature rises naturally when the control unit increases. The actual temperature of the electric boiler uses a thermocouple to measure the output voltage, which is used as the reaction voltage of the system to compare with a given voltage to obtain the error voltage, which is amplified by the voltage amplifier and power amplifier and used as the armature voltage to control the motor.

Under normal conditions, the electric boiler temperature is equal to a certain expected value T°C, and the output voltage of the thermocouple is exactly equal to the given voltage. At this time, the reversible motor does not rotate, and the sliding contact of the voltage regulator stays and adheres to a certain suitable position. Above, make the control unit maintain a certain value. At this time, the heat lost by the electric boiler is exactly equal to the heat drawn by the heater, which constitutes a stable thermal balance and maintains a constant temperature. When the temperature of the furnace T°C suddenly drops for some reason , It will produce the following control process: for example, the heat loss caused by the opening of the electric boiler door, the result of the control is to increase the electric boiler temperature to increase the electric boiler temperature until the actual value of T°C is equal to the expected value.

Related News

Call +86 (0)13825579110 to Get More Information