엔지니어링 도구 · 수처리

입상 여재 여과기 설계

정상 및 여과지 1개 정지 조건의 부하, 다층 여재 수두손실과 역세척수 요구량을 검토합니다.

도시 상수도 정수단계 03 — Clarification & Filtration

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01 · USER INPUT

Design basis and inputs

Design flow *m³/d · plant flow through the filter bankFilter count *filters · identical parallel filtersArea per filter *m² · active filter plan areaFilter run duration *h · user-entered run time for throughput screenBackwash rate *m/h · user-selected applied water rateBackwash duration *min · per-filter wash durationWashes per filter per day *washes/d · user-entered operating assumptionHeadloss filtration-rate basis * · select which calculated or entered operating rate is used in the Ergun screenCustom filtration rate for headlossm/h · used only when Custom rate is selected aboveWater dynamic viscosity *Pa·s · explicit water-property inputWater density *kg/m³ · explicit water-property input

Enter each layer's volume-equivalent spherical particle diameter and separate sphericity. If a supplier gives an already shape-corrected surface-volume diameter, divide it by sphericity before entry.

Sand

NameDepthmVolume-equivalent spherical diametermPorosityfractionSphericityfraction

User-declared bed expansion% · optional geometric screen only; not predicted by the tool

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02 · CALCULATED RESULT

Results at a glance

Load or enter inputs, then calculate to create an authoritative result.

03 · REPORTING

Exports and verification

CSV contains input and output detail. PDF uses the current calculation and report metadata.

Verification suite

Calculation revision 4f9f386b

66 focused fixtures: independent filter-bank, backwash, and multilayer Ergun cases; selected headloss basis, optional expansion, finite-result boundaries, validation, and structured reporting. Tests are deterministic and run without network access.

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엔지니어링 근거

방법론

입력된 여재와 물 특성으로 정상 및 여과지 1개 정지 부하, 역세 유량/수량, 다층 청정 여재층의 Ergun 수두손실을 계산합니다. 입자 지름은 체적 등가 구형 지름을 입력하고 구형도는 별도로 적용합니다. Ergun 결과는 청정층 선별값입니다.

Normal rate = plant design flow / total active filter area. One-filter-out rate uses (N−1) equal filter areas. Rates are reported in m/d and m/h.

Backwash flow = backwash rate × area per filter. Wash volume = flow × duration. Daily volume includes entered washes per filter per day.

Backwash-water fraction = gross daily backwash-water volume / entered plant design flow; it does not represent net recovery.

Clean-bed headloss uses the Ergun equation for each entered layer and sums the layer losses. Enter the volume-equivalent spherical particle diameter; sphericity is applied separately. Velocity converts m/h to m/s; pressure drop converts to head using entered density and standard gravitational acceleration.

A declared bed expansion is applied to layer depth for a geometric screen only. Leaving it blank omits that screen.

범위 / 제한사항

선언된 여재 특성, 역세척 유량과 지속시간, 선택적 층 팽창률로 정상, N−1 또는 사용자 정의 수두손실 조건을 비교합니다.
Does not recommend media chemistry, predict terminal run time from turbidity, predict pathogen removal, or claim regulatory filter credit.
Ergun output is a clean-bed screening estimate. Volume-equivalent spherical diameter, porosity, sphericity, and water properties must be supplied explicitly; do not enter an already shape-corrected surface-volume diameter without converting it first.
Bed expansion is not predicted from wash hydraulics.

엔지니어링 경로

상류 맥락

선택된 상류 고형물 제어 기준 여재 또는 고도 처리 장벽을 검토하기 전에 유입수와 고형물 제어 가정을 확인합니다.

현재 도구의 설계 결정

입상 여재 여과기 설계 정상 및 여과지 1개 정지 조건의 부하, 다층 여재 수두손실과 역세척수 요구량을 검토합니다.

하류 엔지니어링 단계

GAC 파과 및 여층 수명 설계 명확한 수질 목표가 뒷받침하는 경우에만 흡착 또는 산화 장벽을 검토합니다.
오존 주입 및 CT 스크리닝 명확한 수질 목표가 뒷받침하는 경우에만 흡착 또는 산화 장벽을 검토합니다.