Method for heat accumulator system PID fuzzy cascade control

Abstract

The invention relates to the field of heat accumulators, in particular to a method for heat accumulator system PID fuzzy cascade control. The method is characterized in that a heat accumulator is involved, wherein the heat accumulator is located in a process pipeline, a liquid level adjusting system module, a flow control system module and a three-impulse adjusting system module are involved, dueto the fact that steam is not continuously fed into the heat accumulator and the pressure of the heat accumulator changes at any time, the flow fluctuation is quite large, then adjustment requirementsfar cannot be met by adopting single PID adjustment, a pressure change characteristic staging adjustment PID setting value is eradicated, so that the flow is kept in a stable output state, the three-impulse adjusting system module comprises two control loops of a water feeding flow control loop and a heat accumulator water level control loop, and a composite control system composed of a steam flow feedforward and water level-flow cascade system, when the steam flow changes, the water feeding flow control loop in the heat accumulator water level control system can quickly change the water inflow so as to finish rough adjustment, and then fine adjustment of the water level is completed by a heat accumulator water level adjusting valve.

Description

technical field [0001] The invention relates to the field of heat accumulators, in particular to a PID fuzzy cascade control method for a heat accumulator system. Background technique [0002] At present, the converter system in the iron and steel industry has a supporting vaporization cooling system, including deaerators, steam drums, heat accumulators and other auxiliary facilities. A large amount of waste heat will be generated in the steelmaking process, which will be stored in the form of water vapor in the matching heat accumulator system, and then the steam generated by the heat accumulator will be supplied to other energy utilization units, such as industrial steam, for heat exchange and heat supply And so on, because the indirect non-continuous steam is continuously stored in the heat accumulator, the unstable output of the steam will cause the quality of the gas to be lowered by the downstream steam unit, resulting in further waste of energy. Contents of the inve...

AI Technical Summary

Problems solved by technology

A large amount of waste heat will be generated in the steelmaking process, which will be stored in the form of water vapor in the matching heat accumulator system, and then the steam generated by the heat accumulator will be supplied to other energy utilization units, such as industrial steam, for heat exchange and heat supply And so on, because the indirect non-continuous steam is continuously stored in the heat accumulator, the unstable output of the steam will cause a decline in the quality of the gas used by the downstream steam unit, resulting in further waste of energy

Images