Steam Generator with a Horizontal Heat-Exchange Tube Bundle and Its Assembly Method

An assembly method for steam generator vessel with a horizontal heat-exchange tube bundle including manufacturing of steel shells with inner diameter dvess, assembly and welding of shells in order to form a cylinder vessel, equipment of the vessel with at least a feed water supply connection pipe and a steam removal connection pipe, inlet and outlet headers, connection of the same with a heat-exchange tube bundle, arrangement of vessel internals, installation of two elliptical bottoms on the cylinder vessel ends, followed by their welding to the vessel, wherein inner diameter dvess of the vessel is chosen based on the following ratios:

• 0.148
• ·
• D
• +
• 0.637
• ·
• 0.054
• ·
• D
• 2
• +
• 3.142
• ·
• N
• tb
• ·
• S
• h
• ·
• S
• v
• k
• ≤
• dvess
• ≤
• 1.827
• ·
• H
• ,
• where:
• dvess is the inner diameter of the steam generator vessel, mm,
• D is the rated steam generator capacity, t/h,
• Ntb is the number of heat-exchange tubes in a bundle located in the vessel, pcs,
• Sv, Sh is the spacing between heat-exchange tubes in vertical and horizontal rows of heat-exchange bundle, respectively, mm,
• k is the arrangement identifier of heat-exchange tubes in a bundle (k=1 for in-line arrangement and k=2 for staggered arrangement),
• H is the steam generator vessel tube filling height,
• The steam generator vessel is filled with heat-exchange bundle tubes from the bottom upwards to the height of three quarters of its inner diameter or less, the remaining space in the top part of steam generator vessel is left for steam drying.