Gas-fired vacuum hot water boiler works by utilizing the characteristics of different boiling temperatures of water under different pressures. At one atmospheric pressure, the boiling temperature of water is 100 C, and the vacuum hot water unit works in the pressure range below - 0.02Mpa. The corresponding temperature of hot medium water is below 93 C. Under the pressure of the vacuum hot water unit, combustion makes the temperature of hot medium water rise to saturation temperature, and generates steam of the same temperature on the water surface. Next, Shandong Gas Boiler Manufacturers to popularize the gas vacuum hot water boiler selection points!
1. The main control parameters of vacuum hot water boiler are rated thermal power, boiler design thermal efficiency, high outlet water temperature, fuel type, etc.
2. The thermal efficiency of the selected product design shall be no less than the lower limit value specified in the General Technical Conditions for Industrial Boilers (JB/T10094-2002) and the stipulated value of relevant energy saving standards.
3. Boiler pollutant emission concentration should comply with GB13271-2001 "Boiler Air Pollutant Emission Standard".
4. Generally, the water supply temperature of vacuum hot water boiler is not higher than 80 C, which is suitable for low temperature hot water heating.
5. For a boiler room located in a high-rise or multi-storey building, the thermal power of a single hot water boiler shall not be greater than 7MW, and the rated outlet hot water temperature shall not be higher than 95 C. At the same time, the approval and consent of the local safety supervision organization and fire department should be obtained.
6. 选用锅炉时，应要求制造厂提供水阻力特性。宜选用名义工况流量通过锅炉的水阻力≤0.08MPa 的产品。
6. When selecting boilers, manufacturers should be required to provide water resistance characteristics. It is advisable to choose a product whose nominal flow rate is less than 0.08MPa through the water resistance of the boiler.
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