Multi-pipeline steam source mixed heating system based on PLC control

The utility model discloses a multi-pipeline steam source mixed heating system based on PLC (Programmable Logic Controller) control, which comprises a mixed heating box, the mixed heating box is connected with a steam pipeline control system through a steam main pipeline, the mixed heating box is connected with a follow-up treatment system through a water outlet main pipeline, and the mixed heating box is also connected with a water inlet pipeline; a temperature sensor is arranged on the water outlet main pipeline, the system further comprises a PLC control system, and the steam pipeline control system, the follow-up processing system and the temperature sensor are all electrically connected with the PLC control system; according to the utility model, the temperature value of the water outlet of the pipeline in the PLC control system is set, so that the stability of the outlet water temperature can be ensured while cold water is heated; a flexible multi-pipeline steam source mode is adopted, and the method ca