TECHNOLOGY FOCUS - INSTRUMENTATION AND TESTING - Preferred Components: The pyrolysis tank comprises a tank body and a first air outlet port located close to the bottom end on a side wall of the tank body. The three-phase purification and separation device comprises a solid-gas separator and a condenser. The first outlet port is connected to the bottom of the first inlet port located at the bottom of the solid-gas separator via a pipeline. The stationary separation device comprises stationary separator, an acid pool and a tar pool. The side wall of the stationary separator is provided with a mixed liquid inlet, the bottom part is provided with a tar outlet, and the central part is provided with an acid outlet. The mixed liquid inlet is connected to the liquid outlet at the bottom of the condenser via a pipeline. The tar outlet is connected to the tar pool via a pipeline. The acid outlet is connected to the acid tank via a pipeline. The gas purifying device comprises a first chamber, a second chamber and a separator at the spacing of the first chamber and the second chamber. The gas purifying device is filled with neutral water or calcium hydroxide solution. The liquid level in the lower end surface of the separator is 15-20 cm. The first chamber is provided with an air inlet tube and is connected to the third air outlet of the condenser via a pipeline. The first chamber is provided with a spray port for spraying neutral water or calcium hydroxide solution, which is connected to the first chamber and the second chamber via a pipeline. The air pipe of the spray port is located in the second chamber to spray neutral water or calcium hydroxide solution with a liquid level below 5-10 cm. The outer side of the second chamber in the gas purifying device is equipped with a circulating pump to control the spraying of circulating liquid. The pneumatic device is a Roots fan or vacuum pump. The device further comprises a reflux pipeline provided with an adjusting valve on the connecting pipeline between the three-phase purification and separation device and the gas purifying device.