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1. WO2020137496 - METHOD AND APPARATUS FOR CLEANING AND MAINTAINING BOILER PLANT

Publication Number WO/2020/137496
Publication Date 02.07.2020
International Application No. PCT/JP2019/048147
International Filing Date 09.12.2019
IPC
F22B 37/00 2006.1
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
22STEAM GENERATION
BMETHODS OF STEAM GENERATION; STEAM BOILERS
37Component parts or details of steam boilers
F22B 37/52 2006.1
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
22STEAM GENERATION
BMETHODS OF STEAM GENERATION; STEAM BOILERS
37Component parts or details of steam boilers
02applicable to more than one kind or type of steam boiler
48Devices or arrangements for removing water, minerals, or sludge from boilers
52Washing-out devices
F22B 37/56 2006.1
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
22STEAM GENERATION
BMETHODS OF STEAM GENERATION; STEAM BOILERS
37Component parts or details of steam boilers
02applicable to more than one kind or type of steam boiler
56Boiler-cleaning control devices, e.g. for ascertaining proper duration of boiler blow-down
CPC
F22B 37/00
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
22STEAM GENERATION
BMETHODS OF STEAM GENERATION; STEAM BOILERS
37Component parts or details of steam boilers
F22B 37/50
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
22STEAM GENERATION
BMETHODS OF STEAM GENERATION; STEAM BOILERS
37Component parts or details of steam boilers
02applicable to more than one kind or type of steam boiler
48Devices for removing water, salt, or sludge from boilers
50for draining or expelling water
F22B 37/52
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
22STEAM GENERATION
BMETHODS OF STEAM GENERATION; STEAM BOILERS
37Component parts or details of steam boilers
02applicable to more than one kind or type of steam boiler
48Devices for removing water, salt, or sludge from boilers
52Washing-out devices
F22B 37/54
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
22STEAM GENERATION
BMETHODS OF STEAM GENERATION; STEAM BOILERS
37Component parts or details of steam boilers
02applicable to more than one kind or type of steam boiler
48Devices for removing water, salt, or sludge from boilers
54De-sludging or blow-down devices
F22B 37/56
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
22STEAM GENERATION
BMETHODS OF STEAM GENERATION; STEAM BOILERS
37Component parts or details of steam boilers
02applicable to more than one kind or type of steam boiler
56Boiler cleaning control devices, e.g. for ascertaining proper duration of boiler blow-down
Applicants
  • 三菱パワー株式会社 MITSUBISHI POWER, LTD. [JP]/[JP]
Inventors
  • 和田 貴行 WADA, Takayuki
  • 真保 陽一 SHIMBO, Yoichi
  • 野口 良典 NOGUCHI, Yoshinori
  • 大塚 瑞希 OTSUKA, Mizuki
Agents
  • 藤田 考晴 FUJITA, Takaharu
Priority Data
2018-24505327.12.2018JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) METHOD AND APPARATUS FOR CLEANING AND MAINTAINING BOILER PLANT
(FR) PROCÉDÉ ET APPAREIL DE NETTOYAGE ET D'ENTRETIEN D'INSTALLATION DE CHAUDIÈRE
(JA) ボイラプラントの洗浄保管方法および洗浄保管装置
Abstract
(EN)
The purpose of the present invention is to provide a method and an apparatus for cleaning and maintaining a boiler plant, by which, in a period between chemical cleaning and initiation of normal operation, it is possible to subject parts of a boiler to be cleaned to a rust-proofing treatment at low cost and in a short time, and to maintain the boiler. This method for maintaining a boiler plant includes: a step (S2) for subjecting parts to be cleaned, which have scale attached thereto, to neutral cleaning at room temperature using a neutral cleaning liquid containing a rust preventive agent; a step (S4) for circulating an aqueous solution of an ammonia-based compound having a pH of 9.8 or more at room temperature to the parts to be cleaned; and a step (S5) for blowing the aqueous solution of an ammonia-based compound from the parts to be cleaned.
(FR)
La présente invention a pour but de pourvoir à un procédé et à un appareil de nettoyage et d'entretien d'une installation de chaudière, permettant, pendant une période entre un nettoyage chimique et le début d'un fonctionnement normal, de soumettre des parties d'une chaudière à nettoyer à un traitement antirouille à faible coût et en peu de temps, et d'entretenir la chaudière. Le procédé d'entretien d'une installation de chaudière comprend : une étape (S2) permettant de soumettre des pièces à nettoyer, comportant des incrustations fixées, à un nettoyage neutre à température ambiante à l'aide d'un liquide de nettoyage neutre contenant un agent antirouille; une étape (S4) permettant de faire circuler une solution aqueuse d'un composé à base d'ammoniac, présentant un pH égal ou supérieur à 9,8 à température ambiante, sur les parties à nettoyer; et une étape (S5) permettant d'enlever par soufflage la solution aqueuse du composé à base d'ammoniac à partir des parties à nettoyer.
(JA)
化学洗浄から通常運転を開始するまでの期間に、低コスト且つ短時間でボイラの洗浄対象部位の防錆処理を行い、ボイラを保管することができるボイラプラントの洗浄保管方法および洗浄保管装置を提供することを目的とする。本開示のボイラプラントの保管方法は、スケールが付着した洗浄対象部位を、除錆剤を含む中性の洗浄液により常温で中性洗浄する工程(S2)と、洗浄対象部位に、アンモニア系化合物を含むpH9.8以上の常温のアンモニア系化合物水溶液を循環させる工程(S4)と、洗浄対象部位から、アンモニア系化合物水溶液をブローする工程(S5)を備えている。
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