Explanation of the term "hot water boiler for shell heating"
The basic structure of shell heating hot water boiler is double jacket structure. The outer cylinder is called pot shell, the inner cylinder is furnace tank (fire tube), the circular space between the inner and outer cylinders is filled with water, and the inner cylinder is a combustion chamber. When the water vapor medium has pressure, the boiler shell is subjected to internal pressure and the furnace tank is subjected to external pressure. Shell heating hot water boiler is divided into vertical and horizontal. At present, the commonly used fuel and gas heating hot water boiler is WNS horizontal internal combustion boiler shell heating hot water boiler. The shell heating hot water boiler has the following characteristics:
1, the "pot" of holding water and the "furnace" of burning are included in a shell-pot shell;
2, the volume of metal furnace (furnace tank) is small, surrounded by water, the degree of water cooling is large, the combustion condition is poor, so it is necessary to burn high quality fuel;
3, the heating surface is less, the evaporation or thermal power is low, and the water pipe or fireworks pipe is often installed to increase the capacity of heating surface and heating hot water boiler;
4, the shell of pot shell has large diameter, many holes, irregular shape, the internal heating part is connected with the unheated part, and the temperature and thermal expansion degree are different, so the safety of the shell is poor.
5. The structure system of the heating hot water boiler is relatively simple, which is convenient for transportation, installation, operation management and inspection and maintenance.
