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  • What are the requirements for the coal-fired boiler used in the food industry? 2025-05-23
    The food processing needs the steam or hot water to assist the production and improve the efficiency. Usually, the food plant needs the small tonnage boiler, so the coal-fired boiler is not recommended.
  • Why are there percussive sounds and vibrations in the boiler drum or pipe of a coal-fired boiler? (water impact) 2025-05-09
    Percussive sounds ("banging," "hammering," or "knocking") and vibrations in boiler drums or pipes are serious operational anomalies that demand immediate attention. At ZOZEN, we engineer our coal-fired boilers (like the SZL water-tube and DZL fire-tube series) to minimize these risks, but they can still arise due to operational or system issues. Here are the primary causes and ZOZEN's approach to mitigation: Common Causes & ZOZEN Solutions:Water Hammer (Steam Condensation Shock): Cause: Ra...
  • What is the difference between steam and hot water boilers? 2024-12-20
    The primary purpose of the boiler is to supply energy to the facility's operations – for comfort heating, manufacturing process, laundry, kitchen, etc. The nature of the facility's operation will dictate whether a steam or hot water boiler should be used. Hot water is commonly used in heating applications, with the boiler supplying water to the system at 120°F to 220°F. The operating pressure for hot water heating systems usually is 30 psig to 125 psig (hydrostatic). Under these conditions, there is a wide range of hot water boiler products available. If system requirements are for hot water of more than 250°F, a high-temperature water boiler should be considered.
  • What impact will efficiencies have on boiler performance? 2024-03-15
    Combustion Efficiency Combustion efficiency is the effectiveness of the burner only and relates to its ability to completely burn the fuel. The boiler has little bearing on combustion efficiency. A well-designed burner will operate with as little as 15% to 20% excess air, while converting all combustibles in the fuel to thermal energy. Thermal Efficiency Thermal efficiency is the effectiveness of the heat transfer in a boiler. It does not take into account boiler radiation and convection losses - for example, from the boiler shell, water column piping, etc. Fuel-to-Steam Efficiency
  • Why the fuel of the coal-fired boiler needs to add water before entering the furnace? 2024-02-16
    The coal-fired boiler has always been one of the important boiler types in the industrial production and its operating costs and capacity play an important role in the enterprise operation.
  • How can the high-temperature flue gas generated by biomass-fired boilers be effectively discharged? 2024-02-09
    Discharging high-temperature flue gas generated by a biomass-fired boiler efficiently and safely is crucial for boiler operation, environmental compliance, and energy recovery. These gases, if not handled properly, can lead to energy inefficiency and increase the emission of pollutants. ZOZEN Boiler, as a professional industrial boiler manufacturer, incorporates advanced technologies and strategies to manage and utilize high-temperature flue gases from biomass-fired boilers. Here's an overview o...
  • What are the possible consequences of large fluctuation of boiler water level? 2021-11-19
    When the water level is high, the quality of steam will drop. This is because the water level will enter the steam-water separator, and the water will slide out with the steam.
  • What is the reason for the large fluctuation of boiler water level? 2021-11-19
    It is necessary to confirm whether the boiler pressure is correspondingly higher when steam is not used and lower when steam is used. This is mainly due to the different water pressure and volume under different pressures.
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