Title:
METHOD FOR SPRAYING CHEMICAL SOLUTION
Document Type and Number:
WIPO Patent Application WO/2019/189713
Kind Code:
A1
Abstract:
As a method for spraying a chemical solution whereby it is possible to, with respect to a dryer roll rotating at high speed, spray a chemical solution at the surface of the dryer roll while moving a nozzle device back and forth along the width direction of the dryer roll and cause a sufficient amount of the chemical solution to remain thereon, the present invention provides a method for spraying a chemical solution in which, in the dryer section (DP) of a paper machine, a nozzle device (S) sprays a chemical solution at a dryer roll (D1) for guiding wet paper X while the nozzle device (S) is moved back and forth along a rail (L) extending in the width direction of the dryer roll (D1) while the dryer roll (D1) is rotating, and in which: the time T required for the nozzle device (S) to move in one direction is set to 0.4–3.0 minutes; the rotational speed Vd of the dryer roll (D1) is set to at least 100 times/minute; the number of contact times N wherein a single point (Q) on the surface of the dryer roll (D1) makes contact with the wet paper (X) during the time T is set to 50–400 times; the time T, the rotational speed Vd, and the number of contact times N satisfy the relationship N=T·Vd; and the total sprayed amount of the chemical solution is set to 0.3–500 mg/m2 in terms of the amount of the active ingredients of the chemical solution.
Inventors:
SEKIYA HIROSHI (JP)
NAGATSUKA TOMOHIKO (JP)
YUSA KAZUYUKI (JP)
SUGA AYANO (JP)
NAGATSUKA TOMOHIKO (JP)
YUSA KAZUYUKI (JP)
SUGA AYANO (JP)
Application Number:
PCT/JP2019/013908
Publication Date:
October 03, 2019
Filing Date:
March 28, 2019
Export Citation:
Assignee:
MAINTECH CO LTD (JP)
International Classes:
D21F5/02
Domestic Patent References:
| WO2014136445A1 | 2014-09-12 |
Foreign References:
| JP2005314814A | 2005-11-10 | |||
| JP2015193957A | 2015-11-05 | |||
| JP2000096478A | 2000-04-04 | |||
| JP2000096479A | 2000-04-04 | |||
| JP2004058031A | 2004-02-26 | |||
| JP2004218186A | 2004-08-05 | |||
| JP2005314814A | 2005-11-10 |
Other References:
"Pulp and paper manufacturing technology series 6, Paper making", JAPAN TAPPI, vol. 6, 14 December 1998 (1998-12-14), pages 276 - 277
Attorney, Agent or Firm:
SHIRASAKI Shinji (JP)
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