Herramienta de ingeniería · Membranas y Filtración
Modele el flujo de permeado, la relación de recuperación y el TDS del concentrado en sistemas RO multietapa, con verificación de incrustación de membrana y presión osmótica.
Reverse osmosis mass-balance, temperature correction, and salt-passage performance for single- or two-pass, up-to-3-stage concentrate-staged array configurations, with membrane-aging projection and product-water blending.
2- and 3-stage arrays feed each stage from the prior stage's concentrate, raising overall system recovery beyond what a single stage can reach.
Re-pressurizes Stage 1's concentrate before it enters Stage 2, independent of the main feed pump — useful when this stage would otherwise run short on net driving pressure, especially at high recovery or aged-membrane conditions.
Re-pressurizes Stage 2's concentrate before it enters Stage 3, independent of the main feed pump.
Defaults follow the selected feed water type; edit for a specific project. The "Aged" condition (toggle top-right) projects permeate TDS and required feed pressure at end of the stated membrane age — the design should stay within spec at BOTH Day-1 and Aged conditions.
Pass 2's feed is Pass 1's blended permeate, re-pressurized by an interstage pump (modeled as Pass 2's own feed pressure). Common for high-purity applications (boiler feed, semiconductor, pharma) and RO+EDI trains.
Pass 2 feed is Pass 1's permeate (very low TDS), so this selects the 2nd-pass membrane's own bench baseline and aging defaults, not a feed-water fouling classification.
Fully independent of Pass 1's feed pressure — Pass 1's permeate arrives at Pass 2 already at atmospheric pressure (net of its own permeate back-pressure, effectively an atmospheric break tank), so this is the total pressure Pass 2's own booster pump must supply, not an addition on top of any Pass 1 residual.
Pass 2's final concentrate is already near permeate quality (it started from Pass 1 permeate), so recycling it into the raw feed instead of wasting it is standard practice and materially improves overall system recovery.
Optional raw/pretreated water blended directly into the final product stream to hit a target finished TDS without over-designing rejection. Leave flow at 0 to disable.
| Stage | Elements | Recovery | NDP | Osmotic P. | Flux | Rejection | Perm. Flow | Conc. Flow | Conc. TDS |
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| Stage | Elements | Recovery | NDP | Osmotic P. | Flux | Rejection | Perm. Flow | Conc. Flow | Conc. TDS |
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Esta herramienta de ingeniería está disponible actualmente solo en inglés.
Los cálculos de balance de masa y flux siguen la forma estándar basada en recuperación (Qp = Qf·Y), con la presión motriz neta derivada de la presión de alimentación menos las pérdidas del lado del concentrado y la presión osmótica de alimentación.
El paso de sal se normaliza por temperatura y flux respecto a la condición de prueba de banco del elemento, aplicando un factor de polarización de concentración para estimar el paso de sal real en la pared de la membrana.
Aplicación
Escenario
Flujo de trabajo
