Gas-fired boiler maintenance method

• Main Authors: MO YILIANG, YANG TAILIN, LONG JIUYAN
• Format: Patent
• Language: Chinese; English
• Published: 20.04.2016
• Subjects: CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; DIFFUSION TREATMENT OF METALLIC MATERIAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; METALLURGY; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLICMATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASSC23 AND AT LEAST ONEPROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25; NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; TRANSPORTING

The invention discloses a gas-fired boiler maintenance method which is characterized in that the gas-fired boiler maintenance method comprises the following steps that A, steam is supplied to a boiler to expel air; B, warming and pressurization are carried out in the boiler; C, the interior of the boiler is cooled, and condensation water is drained after cooling; and D, inert gas is supplied to the boiler, and the boiler is sealed. With the adoption of the gas-fired boiler maintenance method, moisture in the boiler is dried and oxygen is discharged, so that a situation that water and oxygen which have active chemical properties undergo chemical reaction with metal in the boiler to erode the metal is avoided. The gas-fired boiler maintenance method is suitable for a long-term outage standby boiler.