Steam boiler and hot water boiler are two different types of boiler equipment, many users may use steam boiler in the early stage, later need to use hot water boiler, think of steam boiler can be changed into hot water boiler. Here, Zhengzhou fast boiler manufacturers solemnly tell you that this approach is not desirable, there are very big safety problems.
Problems existing in the conversion of steam boiler to hot water boiler:
1. Cracks occur in the high temperature area of the tube plate
After the reform, the hot water boiler usually forms a stagnant water flow at the back tube plate of the pot barrel, and becomes a stagnant water area. As a result, subcooled boiling and steam film are generated on the rear tube plate, leading to scale and cracking on the tube plate.
2. Unreasonable installation of inlet pipe leads to bias flow and thermal deviation
Due to the unreasonable layout of the return water pipeline into the boiler, such as the water inflow in the single header causes the flow deviation of each loop, which results in the thermal and hydraulic imbalance, resulting in the thermal deviation of the hot water boiler. Because the backwater only comes from the side head, and there is no water on the other side, the existence of thermal deviation will lead to short circuit flow, small resistance, flow pressure, large flow distribution.
The other circuit can only rely on severe water differentials to keep the water circulating. The difference between hot and cold water in hot water boiler is small, so it is difficult to maintain the natural circulation of the loop and overcome the resistance of water flow, which leads to boiler water vaporization on the side of the water cooling wall, and even leads to the failure of water circulation and pipeline explosion.
3, the flow of water resistance is too large, easy to vaporize
Hot water from the boiler cannot be adequately fed into the system because of high water resistance. To reduce the flow resistance of boiler water. The original equipment in the drum, such as steam separator, baffle and device, should be removed to prevent the flow of media.
