The produced water flow is 77m3/h, the design recovery rate is 70%, the design flux is 16.5LMH, and the sulfate removal rate is ≥95%. The number of membranes required for calculation is 138, and the membrane shell is 6-core, with a total of 23 membrane shells.
1. Security filter: FRP horizontal membrane shell type, external pressure filtering. Single filter processing capacity 20m3/h, 6 filters are selected, each filter inlet and outlet is equipped with manual butterfly valve to ensure non-stop filter element replacement. 40-inch filter element total length L = 1120mm, end and tail cover diameter Φ154±1mm.
3. 膜 housing: According to the operating pressure of each section, the first, second and third section membrane shells are respectively selected from the 8040 series 300, 450 and 450psi membrane shells. The outer diameter of the membrane shell is φ244mm, and the inner diameter is φ203mm. When designing the device, the first section is at the bottom of the membrane frame and the third section is at the top of the membrane frame. The three sections of concentrated water pipeline are higher than the installation height of the membrane shell at the highest point of the skid frame.