Heating boiler is a kind of equipment to meet people's living needs in winter. The heating boiler equipments provided by ZOZEN are mainly for urban central heating, including large municipal city thermal pipe network central heating and regional boiler central heating. Centralized heating system in developed countries because of the good quality of the project, generally use small diameter high temperature hot water to convey heat, which can not only reduce energy consumption, but also save initial investment. In recent years, China's urban central heating industry has developed rapidly, initially completing the transformation and upgrading from decentralized small boiler room heating to central heating and cogeneration. Among them, urban heating in northern China is mainly hot water, starting from the improvement of people's livelihood, achieving the scale effect of central heating.