Multivariable linkage automatic spraying dust suppression system and method for belt conveyor

The invention discloses a multivariable linkage automatic spraying dust suppression system and method for a belt conveyor. The multivariable linkage automatic spraying dust suppression system is characterized in that water vapor nozzles are respectively arranged at a transfer point of the belt conveyor and along a conveying belt of the conveyor; a high-pressure water source, a low-pressure water source and an air source are connected with a transfer point water vapor nozzle and a water vapor nozzle arranged along a conveying rubber belt through a pressure regulating valve and a flow regulating valve respectively, the rubber belt conveyor is provided with a belt speed sensor and a coal conveying amount sensor, and smoke and humidity sensors are arranged at the transfer point and along the conveying rubber belt respectively. The control output of a controller is connected with a pressure regulating valve and a flow regulating valve, and signals of a belt speed sensor and a coal conveying quantity sensor and fee