• 葆慷美






  • Non-removable spiral plate heat exchanger type and parameters

    1. Subject content and scope of application
    China's industry standard JB/T4723-92 specifies the basic parameters such as the nominal pressure, nominal diameter and calculated heat exchange area of ​​carbon steel and stainless acid-resistant steel non-removable spiral plate heat exchanger. This standard applies to non-removable spiral plate heat exchangers with a nominal pressure greater than 1.6 mpa, a nominal diameter not greater than 1600 mm, and a nominal heat transfer area not greater than 120 m2. However, with the advancement of technology, large-scale non-removable spiral plate heat exchangers have been widely used in the national economy, and detachable spiral plate heat exchangers have also been greatly developed, so the standard has exposed certain limitations. Therefore, this appendix only provides some useful references.
    2, the symbol description
    PN - nominal pressure, mpa
    DN—nominal diameter, mm
    FN—nominal heat exchange area, m2;
    F - calculate the heat exchange area, m2;
    b — channel spacing, mm;
    δ — plate thickness, mm
    H — board width, mm
    V—Processing capacity at a flow rate of 1 m/h, m3/h
    Lt—the length of the spiral channel, m;
    F—the area of ​​the spiral channel, m2;
    Dn—takes the nominal diameter, mm;
    d — center tube diameter, mm
    3, type
    For the structural formula of the non-removable spiral plate heat exchanger, see Chapter 3. 1.3.1
    4, basic parameters
    4.1 nominal pressure
    Nominal pressure refers to the maximum working pressure that the channel can withstand.
    PN: 0.6, 1.0, 1.6 MPA
    4.2 nominal diameter
    Carbon steel: 500,600,700,800,900,1000,1200,1400,1600mm;
    Stainless acid-resistant steel: 300,400,500,600,700,800,900,1000,1200,1400,1600.
    4.3 nominal heat exchange area
    Carbon steel: 6, 8, 10, 15, 20, 25, 30, 40, 50, 60, 80, 100, 1200 m2;
    Stainless acid-resistant steel: 1, 2, 4, 6, 8, 10, 15, 20, 25, 30, 40, 50, 60, 80, 100 m2.