Due to the sudden power failure after each system can not work normally, at this time in the furnace is burned coal heat also continue to play, and inside the boiler furnace for hot water circulating pump stop cannot add cold water, causing the boiler temperature rise sharply, resulting in a vaporization, make water is steam from the boiler water caused by the expansion water tank openings ejector, this phenomenon is commonly known as "boiled".

The solution to the sudden power failure caused by the boiler running water is to think of the boiler furnace temperature reduction, therefore, open all the furnace door, the natural ventilation and cooling, and from the door of the furnace has not finished burning coal.

At the same time, the water pipe is used to add cold water to the boiler, and the drain valve is opened for drainage. For this emergency operation, the furnace personnel are required to have a strong sense of responsibility, not to leave their posts, pay attention to temperature changes at any time, and keep the normal water level of the boiler not lower than the lowest water level.

There is also the possibility of pipe explosion in the direct supply heating system.

The reasons are: the newly-built boiler and heat network, before putting into operation, did not flush the system according to the provisions, after putting into operation, the debris stored in the pot, causing blockage;

The operation of the boiler and heat network, due to the poor maintenance when the furnace is stopped, resulting in a large number of corrosion products, or the user heating system of dirt, heat network decontamination device improper use or not clean, so that the dirt accumulated in the pipe, causing blockage.

Therefore, the completion of the boiler and heat network should be carefully cleaned, strengthen boiler maintenance, reduce the deposition of corrosion products, cleaning the boiler and heat network before heating every year, improve the circulating water quality;

Frequently clean the decontamination device during operation to prevent impurities in the heat network from entering the boiler.