... secondary pollution, moreover, it’s easy to change the color to black and produce the odor due to ... kettle, heater, circle pump;Cooling system: refrigerating machine, water pump, water tank, cooler I,cooler II, Condenser;Vacuum system: ... coolerDegasification system: vacuum exhauster, exhaust fan, degasification plant, water pump, radiator,deodorizer.oil storage system: distilling storage tank8. ...