How to determine the minimum and maximum gas pressure of the burner?
Thread Content
During the burner design process, there is a very confusing question: How to determine the maximum and minimum pressure of gas design of diffusion burner? In addition to the furnace back pressure, what physical properties of the gas are related to it? I saw in a factory that their gas pressure can reach 0.3MPa(G), but the furnace back pressure is almost normal pressure. ； For acid gas burners with sulfur recovery, the gas pressure can be only 0.15KPa higher than the furnace pressure.
hehe Hehe, it seems that there are special calculations and principles, just search
The gas supply pressure should be determined according to the required output of the boiler, valve group and pipe diameter, etc. Examples are as follows:: A 10-ton steam boiler has a thermal efficiency of 86%, natural gas calorific value of 8600 kcal/h, and boiler back pressure of 1200pa. The required air flow per hour is 812Nm3/h. Select the valve group as DN100 and follow the 0 back pressure provided by the valve group manufacturer. * * The air supply pressure that can be checked on the accumulated flow-pressure characteristic line is 5000pa, then the dynamic pressure in front of the valve is 5000 + boiler back pressure 1200 = 6200pa, so the minimum pressure position dynamic pressure when the boiler is output is 6200pa, and the maximum is best not to exceed 10000pa to avoid excessive pressure causing vibration of the gas supply pipeline.