| 摘要 |
PROBLEM TO BE SOLVED: To provide a device for controlling the reflux and recracking of a primary wax by the cracking liquefaction of waste plastics, and to provide a method for controlling the same. SOLUTION: In the method and device for controlling the reflux and recracking of the primary wax by the cracking liquefaction of a kind of waste plastic, pressure and temperatures measured in a cracking and liquefaction process are transmitted to a controller, and further computed with a control software. The signals are outputted to a control valve to control the opening degree of the control valve. Thereby, the reflux quantity of a wax reflux and recracking reaction in a dewaxing device can suitably be controlled. Namely, the reflux rate of the liquid wax and the height of the liquid wax layer in the dewaxing device are controlled to solve the unstable phenomenon of the reflux quantity of the wax on its reflux and recracking on the liquefaction cracking of the waste plastic. Hereby, the loads of a cracking section is stabilized, and the whole system can continuously be stabilized and operated. The quality of the produced oil can be clarified and improved. COPYRIGHT: (C)2008,JPO&INPIT
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