Title:
CLEANING AGENT FOR HARDLY SOLUBLE FOULING, CENTRIFUGAL THIN-FILM DRYER, AND METHOD OF CLEANING THE CENTRIFUGAL THIN-FILM DRYER
Document Type and Number:
Japanese Patent JP2013075973
Kind Code:
A
Abstract:
To provide a technique for cleaning a hardly soluble fouling, which successfully cleans the scales of calcium salt attached to a metal surface of an apparatus, piping or the like.
A cleaning agent for the hardly soluble fouling contains, as a component, at least formic acid, and cleans the scales of the calcium salt attached to the metal surface. A supply tank 31 for supplying the cleaning agent is connected to the centrifugal thin-film dryer 20. For example, when a waste liquid to be dried is a suspension liquid consisting mainly of calcium borate, the concentration of the formic acid in the cleaning agent is adjusted to 0.5 to 10 wt.%, preferably to 1 to 5 wt.%.
Inventors:
YAITA YUMI
SATO TATSUAKI
SHOJI YUICHI
SAKAI HITOSHI
OKAMURA HAJIME
SATO TATSUAKI
SHOJI YUICHI
SAKAI HITOSHI
OKAMURA HAJIME
Application Number:
JP2011215980A
Publication Date:
April 25, 2013
Filing Date:
September 30, 2011
Export Citation:
Assignee:
TOSHIBA CORP
International Classes:
C11D7/08; B08B3/08; F26B5/08; F26B17/16
Domestic Patent References:
| JP2009271022A | 2009-11-19 | |||
| JPH06280066A | 1994-10-04 | |||
| JP2008528287A | 2008-07-31 | |||
| JPS5085587A | 1975-07-10 | |||
| JPH04227487A | 1992-08-17 | |||
| JPH06280066A | 1994-10-04 | |||
| JP2008528287A | 2008-07-31 | |||
| JPS5085587A | 1975-07-10 | |||
| JPH04227487A | 1992-08-17 | |||
| JP2009271022A | 2009-11-19 |
Attorney, Agent or Firm:
Patent business corporation Tokyo International Patent Office