Title:
CHEMICAL INFUSION CONTROL METHOD
Document Type and Number:
WIPO Patent Application WO/2020/158645
Kind Code:
A1
Abstract:
Multiple chemical infusion levels of differing chemical infusion volumes are set. When control is initiated, chemical infusion is started at the level with the highest chemical infusion volume. Each time a sampling period S passes, the rate of increase in the pressure difference of an RO apparatus 5 is compared with a threshold value A. When the rate of increase is at or below the threshold value A, the chemical infusion volume is reduced to the level that is one step lower. When the rate of increase is greater than the threshold value A, the chemical infusion volume is increased to the level that is one step higher.
Inventors:
OHTSUKA YUTA (JP)
HAYAKAWA KUNIHIRO (JP)
HAYAKAWA KUNIHIRO (JP)
Application Number:
PCT/JP2020/002698
Publication Date:
August 06, 2020
Filing Date:
January 27, 2020
Export Citation:
Assignee:
KURITA WATER IND LTD (JP)
International Classes:
B01D61/04; B01D61/12; B01D65/08; C02F1/44
Domestic Patent References:
| WO2016158633A1 | 2016-10-06 | |||
| WO2013005787A1 | 2013-01-10 |
Foreign References:
| JP2014211327A | 2014-11-13 | |||
| JP2015042385A | 2015-03-05 | |||
| JP2016221449A | 2016-12-28 | |||
| JP2011224543A | 2011-11-10 | |||
| JP2012210612A | 2012-11-01 | |||
| JP2019012435A | 2019-01-24 |
Other References:
See also references of EP 3919162A4
Attorney, Agent or Firm:
SHIGENO, Tsuyoshi et al. (JP)
Download PDF:
Previous Patent: TOMOSYNTHESIS DEVICE AND METHOD FOR DRIVING SAME
Next Patent: DEPTH SUPERRESOLUTION DEVICE, DEPTH SUPERRESOLUTION METHOD, AND PROGRAM
Next Patent: DEPTH SUPERRESOLUTION DEVICE, DEPTH SUPERRESOLUTION METHOD, AND PROGRAM