The boiler will inevitably produce scale and other dirt for a long time, which will have a certain impact on the operation of the boiler, such as reducing the thermal efficiency of the boiler, increasing the fuel consumption, and bringing safety hazards to the boiler, so how to clean and maintain the gas boiler? What method is generally used? Let's learn about it with XinLi boiler.

Boiler cleaning and maintenance

　　Most of the boiler cleaning work is to clean the boiler scale. The common ones are mechanical descaling, pickling and alkali boiling, etc. The details are as follows:

　　1. Mechanical method. For small gas-fired boilers, mechanical descaling can be selected for cleaning and descaling. The specific steps are to discharge water after the boiler is stopped for cooling, and then use a flat shovel, a wire brush and a motorized pipe miller to manually perform mechanical cleaning. Descale. The cleaners need to pay attention not to use too much force to prevent damage to the boiler body.

　　2. Pickling method, pickling and descaling is the use of chemical principles, using hydrochloric acid or nitric acid plus corrosion inhibitor to eliminate scale in boilers, pickling method is a common method, simple and good descaling effect.

　　3. Alkaline boiling method, the use of alkali boiling method is mostly a measure taken for the scale that the boiler is seriously fouled and cannot be removed by the pickling method. The alkali boiling operation is simple and the damage to the boiler is relatively small.

Boiler chemical cleaning range

　　1. For newly installed boilers, the newly installed boilers should be thoroughly cleaned. For example, the system pipes outside the boiler body soda system, the condensate pump to the boiler economizer, etc. should be cleaned, and the new equipment will inevitably be contaminated.

　　2. For boilers that have been in operation, for boilers already in operation, the scope of post-cleaning, such as drum boilers, only cleans the steam-water system of the boiler itself.

　　3. The once-through furnace only cleans the boiler body and the steam-water system of the high-pressure heater.