When the industrial gas steam boiler is in operation, the steam pressure reflects the equilibrium relationship between the steam production of the industrial gas steam boiler and the external steam consumption. When the two are in equilibrium, the vapor pressure remains the same.
When the steam pressure is raised, the amount of steam produced by the industrial gas steam boiler is greater than that of the external steam. The steam pressure of the industrial gas steam boiler is raised, and the saturation temperature of the boiler water is also increased. When the fuel quantity of the industrial gas steam boiler is unchanged, the external load is reduced, the excess heat is stored in the furnace water and the metal heating surface, and a part of the steam is compressed and stored in the steam space and the water wall pipe of the steam drum due to the pressure increase. Since the combustion condition is not changed at this time, the flue gas temperature and the flue gas flow rate of the superheater inlet are not changed, that is, the heat absorption of the superheater is not changed, and the saturated steam temperature of the superheater inlet is increased due to the increase of the steam pressure, and the steam flow is due to the outside And the boundary load is reduced. Therefore, the steam pressure is raised and the steam temperature is increased.
