A bunded stock tank with a level scale, a diaphragm metering pump, a calibration column with suction checks and an injection quill on the process main respond to flow and dose commands in this simulator. Set the target dose, stock strength, pump capacity and stock volume, then compare required feed with the feed that is actually delivered.
• A real-time 3D view with numbered, clickable parts: bunded stock tank and level scale; diaphragm metering pump and eccentric; calibration column and suction checks; injection quill and process main; flow-paced dose controller. Scene tools include home view, focus-selected-part, auto-rotate, expand and show/hide labels, and drag-to-orbit with pinch-to-zoom. • Experiment controls: process-water flow (20–150 L/s); target dose (0–20 mg/L); stock solution strength (5–50 g/L); metering pump capacity (10–300 L/h); initial stock volume (50–500 L); manual feed command; manual capacity fraction (0–100 %); injection line blocked, plus a show flow/process markers toggle, pause/resume, single-step buttons (0.1 s and 1 s), a playback-speed selector and a restart trial action. • Live readouts: required solution feed; actual solution feed; delivered dose; stock remaining; dose error; chemical delivered. A model response curve is drawn beside the 3D view and updates as you change controls. • A Curves & measurements tab with two live charts, the model equations as written in the simulator and snapshot readouts; an Experiments tab with 2 guided presets (capacity limit; blocked injection) plus a model-verification bench, timestamped event log and copyable trial report. • A Learn & assess tab with 3 lessons (dose is mass per water volume; command is not delivery; solution strength changes feed volume), a 2-question knowledge check with reset, and a written model-scope statement.
The required solution feed in liters per hour equals process flow times target dose times 3.6, divided by the stock concentration in g/L. A fixed feed rate therefore gives a lower dose when process flow rises, and a stronger stock solution needs fewer liters per hour for the same chemical mass dose.
The flow-paced controller scales feed with flow, and the pump capacity fraction limits what can be delivered. Delivered dose is recomputed from the actual feed, so the dose error value shows how far the real dose is from the target.
A running or stroking pump does not prove liquid is reaching the process. If the injection line is blocked, actual feed and delivered dose drop to zero even though the drive can continue to stroke, which the blocked-injection experiment shows. Likewise, when the required feed exceeds pump capacity, the actual feed saturates and the dose falls short.
The model is a generic nonreacting solute mass balance. It prescribes no specific chemical or safe treatment dosage, and pressure relief, chemical compatibility and reaction kinetics are outside scope. One animation second represents one minute.
Multiply water flow in L/s by the target dose in mg/L and by 3.6 to get grams per hour, then divide by the stock solution strength in g/L to get liters per hour.
The same chemical mass is spread over more water, so the concentration in mg/L falls. Flow-paced control exists to increase the feed as flow increases.
Actual feed is capped at the pump capacity, so delivered dose is below target and the dose error grows. The capacity-limit experiment shows a required feed far above the limit.
No. It is a generic mass balance for a nonreacting solute. It does not prescribe chemical dosages, model reactions or cover chemical handling, compatibility or relief requirements.