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The use of rotary kiln is becoming more and more extensive. As we all know, the operation of this kind of equipment can not be separated from the control system. In order to make it easier for everyone to operate the system and understand the knowledge of the equipment, today we will introduce its cascade control system. Let's get to know it together.
In the operation of this equipment, a regulating valve is installed on the fuel oil pipeline for heating to control the fuel oil flow and the outlet temperature. Because of the large time constant and many disturbance factors, such as the disturbance of raw material side and load side, and the disturbance of combustion side, the single loop feedback control system can not meet the requirements of the process on the furnace outlet temperature. In order to improve the quality of control, the cascade control system is adopted, which uses the fast action of the secondary circuit, with the outlet temperature of rotary kiln as the main variable and the furnace temperature with less lag as the secondary variable. The cascade control system of furnace outlet temperature and furnace temperature is formed to effectively improve the quality of control, so as to meet the requirements of industrial production. In summary, it is the transition process that the main and auxiliary variables deviate from the set value under the disturbance, and the main and auxiliary regulators overcome the disturbance through the control effect, so that the system can return to a new stable state.
Rotary kiln as a necessary equipment in industry and other fields, the operation control is also very important. According to the explanation in this paper, you can generally understand the cascade control system of this equipment, so as to pave the way for you to use the equipment more conveniently in the future.