The general boiler pressure is always higher than the production of saturated steam pressure, the reason is to overcome the pressure loss in the pipe or network. At present, the pressure of boiler nameplate is much higher than the pressure needed in production. The actual production pressure plus the pressure drop required to overcome all pipe resistance plus a pressure margin of 25 ~ 30% is sufficient.

Many paper mills use traditional coal-fired steam boilers, the equipment is relatively backward and cost large energy. More and more paper mills use circulating fluidized bed boilers to reduce pollution emissions and improve combustion efficiency. Oil-fired gas boilers, biomass boilers and corner tube boilers are also suitable for paper mills.

In addition to boiler output, working medium parameters, coal varieties three basic factors, there are other aspects such as external size, load volatility, water quality, air pollution, mechanization, automation degree, and the main and auxiliary machine selection. The size of the boiler should be considered in the expansion of the original boiler room. The products of different plants vary greatly in size, so the user should find out the product situation of the factory.

When the boiler with different capacity and different types is selected, the boiler with the same capacity and combustion equipment should be selected. If not, try to construct the responsible line of equipment layout and maintenance management. The same model with different capacities or different models with same capacity could be choosed.