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Indirect heating, also known as secondary heat exchange, is toHeat mediumHeat is transferred to cold water through water heater to heat cold water. During heating, heat medium (such as steam) does not directly contact the heated water.The advantage of this method is that the recovered condensate can be reused, only a small amount of make-up water needs to be softened, the operation cost is low, and no noise is generated during heating, the steam will not pollute the hot water, and the water supply is safe and stable.It is applicable to hotels, residences, hospitals, office buildings and other buildings that require stable and safe water supply and low noise requirements.[1]
Chinese name
Indirect heating
Alias
Secondary heat exchange
Indirect heatinghot-water boilerThe lower half of the boiler is composed of a combustion chamber and heat transfer tubes, just like the common boiler;The upper part is equipped with a heat exchanger, and the upper part of the furnace body is equipped with an expansion tank. As the whole boiler is under normal pressure, it is absolutely safe.The heat medium in the boiler does not enter or exit during the whole process of boiler operation, and transfers heat between the heat transfer tube of the boiler and the heat exchanger.The heat medium in the boiler is completely deoxidized and softened after heating, without corrosion and scale, which makes the boiler life more than 20 years.Built in heat exchanger strictly in accordance withShell and tube heat exchangerThe shell side and tube side shall be subject to hydrostatic test respectively.The upper part of the boiler is equipped with an expansion water tank, and the water level is automatically controlled. The pressure free operation is safe and reliable, which simplifies the complicated approval procedures.
