When you purchase boiler equipment, you will pay attention to many problems, how much thermal efficiency, whether it is energy-saving and environmental protection, whether boiler manufacturers have special equipment installation and manufacturing certificates, etc., are the key points you need to pay attention to. At the same time, it is also important that the boiler is regularly maintained during use.
The gas boiler with regular maintenance can effectively extend the service life of the boiler, improve the working efficiency of the boiler, and reduce the incidence of failure, which is conducive to the normal and safe operation of the boiler. Gas-fired boilers that are regularly maintained have better service life, energy savings and failure rates than boilers that are not regularly maintained (especially those that have been in operation for more than one year).
Commonly used boiler maintenance methods are: pressure maintenance, wet maintenance, dry maintenance, and aeration maintenance.
First. pressure maintenance.
Pressure maintenance is required when the boiler is not to be used for less than one week. Before the shutdown process is terminated, the steam water system is filled with water, the residual pressure is maintained at 0.05~0.1 MPa, and the temperature of the boiler water is maintained above 100 °C, which can effectively prevent air from entering the boiler.
Second. wet maintenance.
Wet maintenance is required when the shutdown time is less than one month. Fill the boiler soda system with soft water containing lye, no steam space left. This is because an aqueous solution having an appropriate alkalinity forms a stable oxide film with the metal surface to prevent corrosion.
Third. dry maintenance.
This method is used for maintenance when the boiler is stopped for a long time. The specific method is: after the boiler is shut down, the pot water is drained, the boiler is dried by left heat, and the residual scale and residue in the pot are removed in time, and then the tray containing the desiccant is placed in the drum and on the grate. Finally close all valves, manholes and hand hole doors. Regularly check the maintenance and replace the failed desiccant in time.
Fourth. aeration maintenance.
Aeration maintenance can be used for long-term shutdown maintenance. After the boiler is shut down, do not release water, keep the water level at the high water level, take measures to deoxidize the boiler, and then isolate the pot water from the outside. After the helium or ammonia gas is introduced, the pressure after inflation is maintained at 0.2-0.3 MPa, and nitrogen and oxygen combine to form nitrogen oxide, so that the oxygen cannot be in contact with the steel plate; the ammonia is dissolved in water to make the water alkaline, and can be effective. Prevent the occurrence of oxygen corrosion.
