Fast Heating Control Algorithm for Wire-Mesh Reactor with Adjustable Heating Rate

Abstract

The invention belongs to the technical field of temperature control, and especially relates to a fast heating control algorithm with heating rate arbitrarily adjustable for wire-mesh reactors. The algorithm is characterized by comprising the steps as follows: determining the sampling rate according to the hardware performance; determining the function relationship between stable temperature and output power and the function relationship between heating rate and power matching; calculating the output power value corresponding to a given target stable temperature and the output power value corresponding to a given target heating rate; and heating up quickly according to the output power corresponding to the heating rate in the start stage of heating, and when the actual temperature is close to the target temperature, adjusting the output power to a value close to the output power corresponding to the target stable temperature, and adjusting the output power using a specific control algorithm until the temperature is stable. The algorithm can meet the control requirements of different heating rates, and the heating rate is adjusted in real time by users. The algorithm can ensure that the overshoot is very small in the adjustment and stabilization process, and adjustment and stabilization is quick. The algorithm is of high expansibility. The heating rate can be increased without limit.

Description

technical field [0001] The invention belongs to the technical field of temperature control, and in particular relates to a fast heating control algorithm with arbitrarily adjustable heating rate for wire-net reactors. Background technique [0002] The wire mesh reactor is currently the most ideal experimental device to accurately simulate the rapid heating reaction process at the moment when pulverized coal is put into the boiler. During the experiment, the pulverized coal is placed on the metal wire (wire) net, and the wire net is energized to generate heat. The temperature control system realizes the rapid and variable heating process of the wire net, so as to study the pyrolysis and combustion mechanism of coal powder and other granular fuels. The development of a more reliable and flexible wire network reactor with temperature control is not only of great significance for the clean utilization of coal, but also has broad application prospects in related research fields s...

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Problems solved by technology

Therefore, the essence of the above two algorithms is the same, that is, the parameters are adjusted according to a complete heating process, and the heating rate can only be selected from several alternatives, and continuous and flexible adjustment of the heating rate cannot be realized.

In addition, the adjustment characteristics of PID determine that if the rapidity of temperature rise is to be good, the stability time will be relatively long, and if it is stable without overshoot, the rapidity of adjustment will decrease.

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