| 摘要 |
PURPOSE:To prevent involvement of a coke oven gas in an inlet pipe, by making coal tar and a gas-liquid mixture condensed from a suction main of a produced coke oven gas flow into an inlet pipe kept in an inert gas atmosphere. CONSTITUTION:The top of liquid level of the sealing part 5 at the bottom of the inlet pipe 4 into which coal tar and a gas-liquid mixture condensed from the downcomer 2 of the suction main 1 of a produced coke oven gas to the tar decanter 3 is made to flow is connected to the blowing pipe 6 branched from the main pipe 7 of nitrogen gas, an inert gas such as nitrogen gas, etc. is introduced to the bottom of the inlet pipe, the coke oven gas between the downcomer 2 and the liquid level in the inlet pipe 4 is replaced with the inert gas such as nitrogen gas, etc., the coal tar and the gas-liquid mixture are made to flow in the inlet pipe while the interior of the inlet pipe is kept in the inert gas atmosphere, so that involvement of the coke oven gas in the tar decanter 3 is prevented.
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