| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To reduce the size and setting area of drainage treatment equipment by a simple device. <P>SOLUTION: The treatment method of gasification gas purification drainage includes: cooling gasification gas 9 from a circulating fluidized bed gasification furnace 50, which is configured to circulate a fluid medium 6 to a combustion furnace 1 and a gasification furnace 2 to gasify a raw material 8 by the gasification furnace 2, with water by a water cooling device 16 to remove impurity substance in the gasification gas 9; and guiding impurity substance-containing drainage 23 to a drainage treatment device 33 for detoxification. In the method, the drainage 23 from the water cooling device 16 is pressurized by a pressurization pump 34 and then heated by a heating device 35, the pressurized and heated drainage 23 is separated into discharged water 23a and vaporized component 36 by vacuum flashing, the separated vaporized component 36 is supplied to the combustion furnace 1 of the circulating fluidized bed gasification furnace 50 and subjected to combustion treatment, and the discharged water 23a is guided to an ammonium diffusion tower 39 and an activated sludge tank 40 to detoxify the impurity substance. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
