At normal atmospheric pressure, the boiling point of water is 100 ° C (1 Pa);When the pressure is below the normal pressure value, the boiling point of water will also be below 100℃.In general, when the atmospheric pressure is 0.7 Pa, the boiling point of water is 90 degrees, the pressure is 0.3 Pa, the boiling point of water is 70 degrees, and the pressure is 0.1 Pa, the boiling point of water is 40 degrees.
The ZWNS type of ultra-low nitrogen vacuum hot water boiler forms a vacuum chamber after vacuum pumping. The combustion makes the hot medium water in the vacuum chamber boil and evaporate, generating negative pressure water vapor. The steam condenses outside the heat exchanger tube, and the cold water in the heating tube provides high temperature hot water for heating.
ZWNS model ultra-low nitrogen vacuum hot water boiler internal heat medium water is after descaling, deoxidation and other special treatment of high purity water, is filled before the factory left the factory, when it is closed in the boiler (vaporization, condensation and vaporization), rather than increase or decrease, continuous use for 20 years will not occur corrosion, rust.
And ZWNS models of low nitrogen, vacuum hot water boiler is equipped with the domestic and foreign advanced technology of low nitrogen combustion machine, oil fuel and fuel gas are available, and running after emissions (especially nitrogen oxides) less than 30 mg/m3, a strict environmental policy in China still can normal use, are not affected by environmental problems.