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With the increase of feed water temperature and the decrease of oxygen content in water, the corrosion of boiler, heat engine and piping can be avoided.
Increase the temperature of feed water, reduce the temperature difference of boiler gas drum, reduce the expansion and contraction of steel plate, maintain the balance of pressure, and extend the service life of boiler.
The recovery of condensed water can reduce the recharge water and greatly reduce the cost of water treatment in and out of the furnace.
Process and channel selection
Flow refers to a group of parallel flow channels in a plate heat exchanger in which a medium flows in the same direction. In general, several flow channels are connected in parallel or in series to form different combinations of cold and hot medium channels.
The combination form of the process shall be determined according to the calculation of heat transfer and fluid resistance and meeting the requirements of technological conditions. Try to make the convection heat transfer coefficient in the cold and hot water passages equal or close to each other to achieve the heat transfer effect. Because the heat transfer coefficient is larger when the convective heat transfer coefficient on both sides of the heat transfer surface is equal or close. Although the flow velocity between plates is different, the average flow velocity is still used in the calculation of heat transfer and fluid resistance. Since the "U" shape single flow nozzles are fixed on the compression plate, it is convenient to disassemble and assemble.
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