| 摘要 |
PROBLEM TO BE SOLVED: To relax the restriction of an arranging space in a height direction by suppressing the bulkiness in the height direction, to reduce the number of parts to reduce cost and to prevent the adhesion of foreign matter to a take-in pipe of an untreated soln. at a time of cleaning. SOLUTION: When a foreign matter accumulated on the inner wall 37 of a cylindrical body 30 is cleaned, relative rotary means 36, 56, 66 rotate the cylindrical body 30 in the direction opposite to a scraper 50 to prevent the cylindrical body 30 from following the scraper 50 to rotate in the same direction as the scraper 50. The foreign matter passing through the lower opening 33 of the cylindrical body 30 to be discharged downwardly is prevented from adhering to an untreated soln. take-in means 70 arranged above the cylindrical body 30.
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