1. Soften the water
For the main scaling substances such as calcium and magnesium salts in water, sodium ion softening is generally adopted to treat them, which can effectively inhibit the growth of these scaling substances in the long run.
2, decontamination facilities
The decontaminator is usually installed in the boiler room and the inlet pipe of the indoor system to effectively separate the water and slag.But the practice shows that its separation effect is limited.
3. Boiler discharge
Blowing down in steam boiler is very important, and its effect is also very obvious, regardless of continuous or regular sewage can effectively discharge the excess salt content of boiler water.But the effect of sewage discharge in hot water boiler is not very obvious.The difference is: first of all, the steam boiler water intake per hour is only 10 tons, and the same capacity of hot water boiler water intake per hour is about 240 tons.It can be seen that the water flow in the hot water boiler is particularly large, more than 20 times that of the steam boiler with the same capacity.
At present, the commonly used sewage discharge method is that the circulating pump is stopped for 2 hours, and the impurities in the water are precipitated and then the sewage discharge valve is opened to see clean water.However, the effect of this method of sewage discharge is limited, because the sewage pipe installed in the drum and the lower collection tank cannot discharge the distant sediment clean.
4. Clean the stains
Practice has proved that the combination of chemical and mechanical methods to clean water residue is an effective treatment method.Some people think that the heating system is equipped with an effective water softener and no longer needs to be cleaned.This idea is not in line with the actual situation, it should be said that there should be softening water treatment, but also with the combination of cleaning method, is an effective and thorough treatment method.
(1) internal cleaning of the boiler
After the operation of the boiler in winter, we can see a large number of red and black loose water slag deposited in the bottom of the drum and the lower collection box, and we can also see the sheet water slag adhering to the drum, water wall, smoke pipe and the inner wall of the collection box.The water residue can be cleaned by chemical or mechanical means.The traditional mechanical device is the furnace washer;Cleaning effect is better, but due to the limitations of the pot space, especially for the pyrotechnic tube boiler can not be put to good use.The cleaning method combined with the chemical boiler and the high-pressure water machine is effective and can reach the degree that the material on the heating surface of the boiler can see its true color.
(2) cleaning of external network and indoor facilities
After the end of the winter operation, the water and slag in the external network and indoor facilities should also be cleaned. The cleaning of indoor facilities often adopts simple people to start cleaning. The cleaning of the water and slag in the external network can be treated by the method of sewage discharge in the inlet of the indoor system under the operation of the circulating pump.