Title:
OBSTRUCTION REMOVAL METHOD
Document Type and Number:
WIPO Patent Application WO/2020/217506
Kind Code:
A1
Abstract:
Provided is an obstruction removal method that is a method to remove obstructions from a supercritical water reaction device that comprises: a heat exchanger that has a channel by which a liquid to be process is introduced; and a reactor that decomposes, by using supercritical water, the liquid being processed that has passed through the heat exchanger. The obstruction removal method includes a dissolution step and a blowdown step. In the dissolution step, during startup or shut down of the supercritical water reaction device, water is supplied to the channel and a state in which the temperature inside the channel or the temperature of the inner wall is a prescribed temperature and the pressure inside the channel is a prescribed pressure is maintained for a prescribed time. In the blowdown step, the water in the channel is discharged to the outside of the supercritical water reaction device. The prescribed temperature is 250°C to 400°C. The prescribed pressure is 20 Mpa or greater.
Inventors:
WADA YASUTAKA (JP)
TANIGAWA HIROAKI (JP)
UCHIYAMA ICHIRO (JP)
TANIGUCHI NAOHIKO (JP)
MATSUMURA YUKIHIKO (JP)
NOGUCHI TAKASHI (JP)
TANIGAWA HIROAKI (JP)
UCHIYAMA ICHIRO (JP)
TANIGUCHI NAOHIKO (JP)
MATSUMURA YUKIHIKO (JP)
NOGUCHI TAKASHI (JP)
Application Number:
PCT/JP2019/018103
Publication Date:
October 29, 2020
Filing Date:
April 26, 2019
Export Citation:
Assignee:
CHUGOKU ELECTRIC POWER (JP)
UNIV HIROSHIMA (JP)
TOYO KOATSU CO LTD (JP)
UNIV HIROSHIMA (JP)
TOYO KOATSU CO LTD (JP)
International Classes:
B01J3/00; B08B9/032; F28G9/00
Foreign References:
| JP2002224690A | 2002-08-13 | |||
| JP2014189588A | 2014-10-06 |
Attorney, Agent or Firm:
SAKAI INTERNATIONAL PATENT OFFICE (JP)
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