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    Stove type characteristics of chain grate hot water boiler

    Source: Shandong Boiler Parts 2019/4/8 9:27:42 Click:
    1. The boiler adopts the combined structure of the heating surface of the boiler shell pyrotechnic tube and the heating surface of the water pipe, which fully utilizes the technical advantages of the two heating surfaces. The drum adopts a quasi-elastic combination structure of arched tube sheet and threaded smoke pipe, which not only makes the boiler structure compact, but also has good low cycle fatigue resistance. The water cooling wall on the boiler side and the convection heating surface of the water pipe adopt a parallel structure and are connected to the upper and lower headers, which not only has high heat transfer efficiency, but also serves as the support structure of the boiler body to ensure that the boiler can expand freely and thermally expand under working conditions, and the boiler runs safely. reliable;
    2. The boiler adopts the heating surface of the convection tube bundle as the flue gas flow behind the furnace, ensuring that the flue gas temperature of the front tube sheet smoke box is lower than 650 ° C, eliminating the possibility of local overcooling boiling and scaling in the end area of the flue tube. Type, which also eliminates the hidden danger of accidents caused by cracks in the tube sheet, and basically solves the cracks that occur in the bridge area of the front tube sheet of the raw water fire boiler shell-type hot water boiler using the wing-shaped flue structure;
    3. The boiler working fluid adopts compound cycle technology. The front arch tube and front wall heating surface of the boiler, and the rear arch tube and rear wall heating surface adopt natural circulation method of working medium. The side water cooling wall tube and side convection tube bundle are forced circulation mode during normal operation to ensure the side water cooling wall tube. The water speed in the convection tube bundle is not only higher than the safe water speed of the heat load it receives, but also to ensure that the sediment carried by the return water is unlikely to deposit in the lower header, which completely eliminates the possibility of side wall water wall tube bursting;
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