| 摘要 |
Provided is a film washing fluid supply joint for adjusting the supply of such a film washing fluid to a lower pipe of a filtration film module as is supplied into the lower pipe at the filtration film washing time of the filtration film module. The film washing fluid supply joint comprises a joint member for connecting the lower pipe of the filtration film module and a branch pipe of a header pipe watertight. The film washing fluid supply joint is characterized in that the joint member includes a cylinder portion, into which the lower pipe is inserted from one end portion and into which the branch pipe is inserted from the other end portion, in that a predetermined clearance is formed between the inner circumference of the cylinder portion and at least one of the outer circumference of the lower pipe and the outer circumference of the branch pipe, in that a discharge port for discharging the film washing fluid to the outer circumference of the lower pipe or the branch pipe is formed in that portion of the cylinder portion, in which the clearance is formed, and in that a supply pipe for supplying the film washing fluid is connected to the discharge port.
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