Polyester solid-phase polycondensation waste heat utilization system and control method

Abstract

The present application relates to waste heat recycling technical field, disclose a kind of polyester solid phase polycondensation waste heat utilization system and control method, including cooler, efficiency device and heating device, air inlet pipe and air outlet pipe are equipped on cooler, efficiency device includes heat transfer water tank, the air outlet pipe of cooler is communicated with the bottom of heat transfer water tank by waste heat pipeline, and water outlet pipe and backwater pipe are arranged on heat transfer water tank;Heating device includes EG heating pipeline, heat exchanger is arranged on EG heating pipeline, the water inlet pipe of heat exchanger is communicated with the water outlet pipe of heat transfer water tank, the backwater pipe of heat transfer water tank is communicated with the drain pipe of heat exchanger, EG feed pipe is connected with heat exchanger, and EG enters slurry mixing tank after heat exchange by heat exchanger;Temperature sensor is arranged in slurry mixing tank, first control valve is arranged on EG heating pipeline, and temperature sensor and first control valve are electrically connected with controller.The present application can solve the technical problem that a large amount of hot air in the outlet section of existing solid phase polycondensation cooler cannot be effectively utilized.

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