Reagents and equipment for washing boilers:
Purge the boiler is a systematic process that is regularly carried out in order to remove sludge and salt from the boiler accumulated during operation. They can be obtained both from water and formed during the operation of equipment. Undoubtedly, the amount of such impurities will depend primarily on the quality of the water – the cleaner it is, the less sludge in the system. Typically, purge processes take several seconds to several hours.
Flushing the boiler provides for the inlet of special reagents into the system, which are capable of dissolving scale, precipitation, and elements of biological fouling. The main components of these deposits are calcium and magnesium carbonates, iron oxide, less commonly silicates, phosphates, etc. It is worth noting that more precipitation is formed in steam boilers than in water boilers, since the heating temperature is higher. Chemical flushing is performed approximately once a year.
Reagent washing of boilers is carried out in several stages:
- flushing with purified water the internal surfaces of heat exchangers;
- alkalization of boilers;
- the introduction of an acid solution and the start of circulation;
- flushing;
- passivation and neutralization;
- cleaning the boiler surface with industrial water;
- rinsing with a stream of purified water.
Depending on the contamination of the boiler, such operations can be carried out both once and in several cycles. Sometimes it is worthwhile to completely purge the boiler before chemical flushing in order to fully remove the sludge from the system.
Reagents for washing:
Alkalis, mainly sodium hydroxide, less often soda – are used to alkalize boilers before acid washing. This operation is performed in order to passivate metal surfaces before acid washing.
Acids (hydrochloric, phosphoric, sulfamic and mixtures thereof) are designed to dissolve a variety of deposits – scale, rust, silicates, etc.
Biocides – are used to remove microbiological fouling in low-temperature domestic boilers.
Integrated reagents for flushing boilers are also widely used today .
The boiler washing equipment or water filtration plant is a circulation pump with a tank into which the reagent solution is poured. It is worth remembering that before draining aggressive flushing reagents into the sewer, they must be neutralized with special solutions for neutralization.
We tried to tell what we knew about chemicals for boiler houses. If you need more detailed advice on your case, contact the chat or the site’s hotline.
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