TECHNOLOGY FOCUS - INSTRUMENTATION AND TESTING - Preferred Components: The purifying and recycling device comprises a water bath purifier, a coke device, a condensation separator, a condensation circulating water pool, a wood vinegar liquor recycling pool and a wood tar recycling pool. The bottom of the water bath purifier is connected to outlet of the purifying and recycling pool through a pipeline. The water bath purifier is connected to wood vinegar liquor recycling pool. The water bath purifier comprises a low flow inlet and a high flow inlet structure. The water bath purifier is provided with a spiral leaf and water nozzle. The water bath purifier air outlet is connected to the coke device provided with a filter screen and separated by a filter cavity. The filter cavity is filled with filtering materials. The coke device comprises a low flow and high flow regulating structures. The air outlet of coke device is connected to the condensation separator via a pipeline. The condensation separator is connected to the condensation circulating water pool. The condensation separator is provided with a condensing cavity. The condensation cavity is provided with a condensing pipeline. The bottom of the condensation separator is provided with a collector. The air outlet of the condensing separator is connected to the draft fan through a pipeline. The water nozzle in the water bath purifier is set on the upper and lower inner parts of the water bath purifier, which are relative to the two ends. The water nozzle comprises a double nozzle structure. The pipeline of the condensation separator extends towards the bottom of the condensing cavity. The draught fan is a roots blower. The tail gas purifying and recycling device comprises a gas phase separator connected to a gas-liquid filter. The gas-liquid filter is provided with a grid, which divides the filter cavity. The filter cavity is filled with coke. The bottom of the gas-liquid filter is set with a collector. The collector is connected to the wood tar recycling pool. The outlet of the gas-liquid filter is connected to the gas liquid separator by a pipeline. The gas-liquid separator is provided with a cover plate at the intersection of two sides of the inner wall. The bottom of the gas-liquid separator is provided with a collector. The collector is connected to wood vinegar liquor recycling pool. The air outlet of the gas-liquid separator is connected to the buffer tank through a pipeline. The buffer tank is provided with a vent pipe. The air outlet of the buffer tank is connected to a liquid phase separator through a pipeline. The liquid phase separator is filled with adsorbing materials. The bottom of the liquid phase separator is provided with a collector. The outlet of the liquid phase separator is connected to the gas separator through pipeline. The gas separator is provided with a grate plate, which forms the cavity. The cavity is filled with adsorbing materials. The bottom of the gas phase separator is provided with a collector. The air outlet of the gas phase separator is connected to a gas purifier through a pipeline. The gas purifier is provided with grate plate, which forms a cavity. The cavity is filled with purifying materials. The bottom of the gas purifier is set with a collector. The air outlet of the gas purifier is connected to the water seal through a pipeline. The air outlet of the water seal is connected to gas storage tank through a pipeline. The outlet pipe of the storage tank is connected to a gas dryer. The air outlet of the dryer is filled with desiccant. The dryer comprises an outlet transmission pipeline.