SCALE REMOVING METHOD FOR SUPERCRITICAL HYDROXYLATION DEVICE

PROBLEM TO BE SOLVED: To provide a scale removing method by which scale removal of a supercritical hydroxylation device can be economically performed. SOLUTION: First, a supercritical hydroxylation device 10 is stopped from operating and fluid is let out of a preheater 14, a reactor 12, a heat excha...

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Bibliographische Detailangaben
1. Verfasser:	SUZUGAKI HIROSHI
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS METALLURGY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE THEIR RELEVANT APPARATUS TRANSPORTING TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a scale removing method by which scale removal of a supercritical hydroxylation device can be economically performed. SOLUTION: First, a supercritical hydroxylation device 10 is stopped from operating and fluid is let out of a preheater 14, a reactor 12, a heat exchanger 16, and a cooler 18 to empty them. Next, a scale removing chemical is introduced from a liquid-to-be-treated pipe 20 and is caused to flow in the preheater, reactor, heat exchanger, and cooler and to flow out from a treated liquid pipe 24 and is collected as waste liquid in a suitable vessel. Next, the supercritical hydroxylation device 10 is made to resume operation, and the waste liquid is mixed with liquid to be treated to feed the mixture to the supercritical hydroxylation device 10 during supercritical hydroxylation treatment to perform supercritical hydroxylation treatment of the waste liquid. Since the waste liquid undergoes supercritical hydroxylation treatment by the supercritical hydroxylation device 10 and waste liquid of the scale removing chemical does not need to be separately treated, scale can be removed at a low removing cost.