Method for controlling temperature of decomposing furnace under condition that cement kiln co-processes garbage

The invention discloses a method for controlling the temperature of a decomposing furnace under the condition that a cement kiln co-processes garbage. The method comprises a prediction controller, an abnormal working condition controller, a garbage feedforward controller and working condition identification. A correct controller is selected according to the change of the current working condition, so that the temperature of the decomposing furnace tracks a set value, and the cone temperature of the fifth-stage cyclone preheater is lower than the maximum value. According to the method, a wavelet packet decomposition method is adopted, the outlet temperature of the decomposition furnace, the cone temperature of the fifth-stage cyclone preheater, the actual value, the real-time value and the change trend of garbage are recognized, working condition division is conducted on a temperature control system of the decomposition furnace, and therefore the control effect of a controller can be further optimized. 本发明公开了一