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What are the furnace temperature automatic control analysis of high temperature furnace
SOURCE:PROTECH(CHINA) HOLDINGS LIMITED Time£º2020-11-06 10:04
What are the furnace temperature automatic control analysis of high temperature furnace

    For the error of the temperature of the high-temperature furnace to a given temperature, the heat source energy supplied to the resistance furnace is automatically turned on or off, or the size of the heat source energy is continuously changed, so that the furnace temperature is stable within a given temperature range to meet the needs of the heat treatment process. There are two-position, three-position, share, share integral and share integral derivative and so on. Resistance furnace temperature control is such a reaction conditioning process, comparing the actual furnace temperature and the need for high-temperature furnace temperature to obtain the error, after dealing with the error, the control signal is obtained to adjust the thermal power of the resistance furnace, and then the furnace temperature control is completed.

  1) The control effect (PID control) is generated according to the error share, integral and derivative, which is the most widely used form of control in process control.

  2) Two-position conditioning-It has only two states: on and off. When the temperature of the high-temperature furnace is lower than the set value, the actuator is fully open; when the furnace temperature is higher than the set value, the actuator is fully closed. The actuator is usually a contactor.

  3) Three-position conditioning-It has two given values ​​of upper and lower limits. When the temperature of the high-temperature furnace is lower than the given value of the lower limit, the contactor is fully open; when the furnace temperature is between the upper and lower given values, the actuator Partially open; when the high-temperature furnace temperature exceeds the upper limit given value, the actuator is fully closed. For example, when the tubular heater is a heating element, three-position conditioning can be used to complete the difference in heating and holding power.

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