Causes and elimination of the unpleasant smell of water from the boiler:
The unpleasant smell of water from the boiler is a certain discomfort and may indicate certain problems with water or equipment. Let’s try to figure out why the water in the boiler stinks. Industrial Ro plant has similar features as of boiler.
Microbiological fouling:
They can occur in the water tank if you:
- use it extremely rarely, for example, when disconnecting centralized water supply or in the country in the summer season;
- maintain an economical heating mode up to 50 – 60 ° С.
In this case, a favorable environment is formed for the propagation of microorganisms, which, when dying and the isolation of waste products, cause an unpleasant odor of water. Usually characteristic is rotten or putrid odors. Sulfur bacteria that develop well under conditions of oxygen deficiency reduce sulfates from water to hydrogen sulfide. They are completely safe for humans, but at the same time, sulfur compounds released in the course of their life exacerbate corrosion.
In this case, heating the boiler to the highest possible temperature and draining the water should help, it may be necessary to perform this operation several times. If this does not help, then qualified flushing will be required. If the smell has not disappeared, then the reason must be sought further
Sulphate anode reaction:
Hydrogen sulfide obtained as a result of the reaction of a magnesium anode with sulfates from water. If cold water does not have a characteristic hydrogen sulfide odor, this is most likely the reason.
Check if the cause is really in the anode by temporarily unscrewing it. If the smell disappears, you just need to replace it with zinc, aluminum or titanium. These metals do not react with sulfates. The boiler cannot work without an anode. This will lead to a quick corodation of the tank, especially in the weld areas. The figure shows a new and spent magnesium cathode.
Source water quality:
With increasing water temperature, the solubility of most volatile organic substances decreases and they begin to stand out. As a result, an aromatic, medicinal smell may be felt. This indicates pollution of water with organic substances (phenols, organochlorines, etc.). In this case, you should understand that water contains a high content of such substances and should not be consumed for drinking, but it is safe for the boiler. You can help yourself in this case only by installing a carbon filter for water.
As for the hydrogen sulfide smell, such water will have a smell immediately at the exit from the well, therefore, if initially the water has no smell of hydrogen sulfide, then the reason is not the properties of the water. Catalytic materials will help to remove the smell of “rotten eggs”.
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