By Jack Sun · Filtalloy
Choose an immersed sparger by confirming the target gas flow, available pressure at that flow and the required bubble coverage in the tank.
Gas flow and pressure budget
State the measurement basis for gas flow. The supply-to-headspace pressure difference must cover line losses, the wet sparger pressure requirement above local liquid pressure and liquid head. For a nearly uniform liquid at rest, the head is ρgh; 1.0 m of water gives about 9.8 kPa. Count it once if the submerged inlet measurement already includes it. Record initial bubbling separately from the pressure required at target flow.
Why equal pore ratings can produce different bubbles
Surface tension, viscosity and wetting affect bubble formation. Flow and the number of active pores can affect coverage. Specify observation position and timing because bubbles can coalesce or break up as they rise. Experimental study on metal porous spargers
Disc and tube layouts
A disc can suit a local floor area; a tube can distribute gas along a longer zone. Check orientation, available space, emitting area, branches and submergence. Compare coverage at the same target flow.
Compare two candidates in one tank
Use the same liquid, liquid level, gas flow basis, meter and pressure reference. Record each emitting surface depth, inlet pressure, active bubble zone and observations at a defined height. If a tube emits mainly near the inlet, check orientation, depth and the supply layout. Confirm that the selected coverage is achievable at available supply pressure.
Drawing and acceptance checklist
Supply tank dimensions, working depth, gas and target flow, liquid, connection and coverage area. Agree the test liquid, depth, flow basis, inlet pressure and coverage criterion. Specify any bubble size observation or process transfer test separately.
Powder-sintered porous metal products
Jack Sun has long worked in metal wire mesh weaving and industrial filter-element manufacturing. Filtalloy is based in Anping, Hengshui, Hebei, China.
