Liquid feed distribution device
Liquid feed distribution device
Liquid feeding devices offer a variety of solutions for different feeding conditions in the process tower:
Single-phase feeders: Distribute the unflashed liquid directly to the distributor or to a shielded collecting tank;
Flash feeders: annular tube feed design to accelerate flash and stabilize dosing;
Gas-liquid two-phase feeder: center tube or double-disk separation, taking into account the distribution of gas and liquid phases;
Outside the tower flash separation feed: external flash tank to separate gas and liquid, improve the stability of small tower operation.
Technical parameters
Feeding mode | Feed interface type | Applicable flash rate | critical dimensions | Material |
Single phase direct feed | Straight pipe / ring pipe | 0% | Feed opening φ50–φ200 mm | 304/316L SS |
Shutter type annular sump feed | Flange/threaded connection | ≤ 10% | Groove depth 50–100 mm, hole diameter 3–10 mm | 304/316L SS |
Superheated liquid annular tube feed | Annular porous tube | ≤ 10% | Pipe diameter φ50–φ150 mm, impact plate 50 mm | 304/316L SS |
Center tube gas-liquid two-phase feeder | central single tube | 10–20% | Pipe diameter is calculated based on gas content, flow rate < 0.3 m/s | 304/316L SS |
Double disc gas-liquid separation feeding device | Double layer separation plate | 10–20% | The opening rate of the upper plate is 50%, and the spacing is 300 mm | 304/316L SS |
External flash distillation separation feed | Flash Tank + Distribution Pipe | > 20% | Flash tank volume is customized according to flash rate/flow rate | 304/316L SS |
Product Features and Benefits
Flexibility to match multiple feed conditions
Single Phase Feeder Dispenses liquids directly or through a shielded catch basin;
Flash steam feeders with annular porous tube design to accelerate vaporization and prevent shock;
Gas-liquid two-phase feeder adopts center tube or double-disk type scheme to realize gas-liquid separation evenly.
Low Pressure Drop, Easy Maintenance
Stainless steel piping and baffles are designed for low resistance, and modular flange/threaded connections allow for easy disassembly and cleaning.
High operating flexibility
By adjusting the orifice diameter of the annulus, the level of the liquid collecting tank or the height of the double disk, it can be adapted to a wide range of working conditions with flash vaporization rates of 0-20% or more.
Corrosion and temperature resistance
316L stainless steel with mirror-polished surface meets the high demands of chemical, petrochemical and food-grade processes for material compatibility.
Optimized space utilization
Ring tube feeders and double disk units can be installed immediately below the packing layer without taking up excess tower height.
Product application industry
Petrochemical distillation columns: intermediate charging or top reflux, often with single-phase feeders and shielded liquid-collecting tanks.
Absorption and desulfurization towers: ring tube feed of superheated liquids with a small amount of flash vapor, maintaining stable under-liquid distribution.
Liquid-liquid extraction columns: gas-liquid two-phase feeders (double disk or center tube) to ensure fine spraying of the dispersed phase.
Bio-fermentation and pharmaceuticals: single-phase feeding of reflux liquid, mixing and redistribution in the collecting tank, taking into account the aseptic requirements.
Small diameter towers and retrofit projects: flash separation feed outside the tower is used when the flash rate is high to ensure stable operation.
FAQ
If the feed temperature is lower than the bubble point, single-phase direct feeding is available without flashing; if the flashing rate is ≤ 10%, a ring tube flash feeder is recommended.
For flash rates of 10-20%, a center tube two-phase feeder or double-disk separator may be used; above 20%, an off-tower flash separation system is recommended.
Installation of an impact baffle at the inlet of the annulus or collecting tank, and maintaining a tank depth of ≥ 50 mm, can effectively cushion the impact.
All modular components can be sectionalized into the tower through the manhole, and flange/thread sealing is guaranteed after field assembly, eliminating the need for major disassembly and installation.
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