EngiViz

Engineering, visualised.

Interactive lessons that show how mines, water plants and power stations really work: the process, the reasoning and the numbers engineers use.

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65Lessons

10Tracks

17Free to open

Free lessons open for everyone, no account needed. A free account saves your progress. Membership: $5 for a month or $12 for a year opens every lesson. Terms

What a lesson gives you

▶Animated process diagrams
Watch material, water and steam move through the plant.
☉Click any equipment
Each item opens its own detailed lesson.
∑The numbers engineers use
Written explanations with the reasoning behind them.
✓Progress saved
With a free account, mark lessons complete and pick up where you left off.

Mining

From the pit bench to the paste plant.

Open Pit Mining 8 lessons

Open Pit Mining

The full drill, blast, load, haul and crush cycle on the pit benches.

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Blasthole Drill Rig

How a rotary rig drills the blast pattern on a bench.

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Blast Design and Firing

Charging, stemming and timed firing of a bench blast.

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Excavator Loading

Digging the muck pile and filling haul trucks.

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The haul cycle, payload and ramp grades.

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Primary Crusher (Gyratory)

First size reduction of run-of-mine ore.

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Moving ore and filter cake with belts, pulleys and idlers.

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Bench and Haul Road Geometry

Bench height, berms, ramps and road width.

Mineral Processing 8 lessons

Mineral Processing Plant

From crushed ore to concentrate and tailings.

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ROM Bin and Jaw Crusher

Rock compressed between a fixed and a moving jaw.

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Semi-autogenous grinding with ore and steel balls.

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Fine grinding with steel balls in a closed circuit.

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Sizing particles by centrifugal force.

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Separating minerals with reagents and air bubbles.

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Vacuum Disc Filter

Dewatering slurry into filter cake.

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Tailings Storage Facility

Storing tailings behind a dam and recycling water.

Paste Backfill 7 lessons

Paste Backfill Plant

Turning tailings into paste and placing it underground.

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Paste Thickener

Thickening tailings to a dense underflow.

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Vacuum Disc Filter

Dewatering slurry into filter cake.

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Paste Mixer and Binder

Mixing cake, binder and water into paste.

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Piston (PD) Pump

The positive-displacement pump that pushes paste underground.

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Filling mined-out stopes to support the rock mass.

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Centrifugal Pump

How an impeller turns rotation into flow and head.

Water & Waste Water

Treatment plants, step by step.

Water Treatment 8 lessons

Water Treatment Plant

Raw water to safe drinking water, stage by stage.

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Removing large debris at the inlet.

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Coagulation and Rapid Mix

Dispersing coagulant into raw water in seconds.

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Gentle mixing that grows settleable flocs.

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Sedimentation Tank (Clarifier)

Settling flocs out of the water.

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Rapid Sand Filter

Filtering fine particles and backwashing.

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Disinfection and a lasting residual.

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Clear Water Storage

Storing treated water and balancing demand.

Waste Water Treatment 8 lessons

Waste Water Treatment Plant

Sewage to clean effluent, plus biogas from sludge.

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Removing large debris at the inlet.

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Aerated Grit Chamber

Settling sand and grit.

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Primary Clarifier

Settling raw sludge and skimming grease.

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Bacteria digest organics in the activated sludge process.

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Secondary Clarifier

Separating biomass and recycling sludge.

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UV Disinfection

Disinfecting effluent with ultraviolet light.

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Anaerobic Digester

Turning sludge into biogas without oxygen.

Power Generation

Cycles, boilers, turbines and combined-cycle plants.

Power Cycles 4 lessons

The ideal heat engine and the efficiency limit.

The steam cycle behind thermal power plants.

The gas turbine cycle.

Gas and steam cycles working together.

Coal-Fired Power Plant 5 lessons

Coal Plant: Simple Cycle

The basic coal-fired steam plant.

Coal Plant: Re-Heat Cycle

Reheating steam to raise efficiency.

Coal Plant: Re-Gen Cycle

Regenerative feed-water heating.

Coal Plant: Re-Heat and Re-Gen

Reheat and regeneration combined.

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Coal Handling System

Wagon tippler, conveyors and coal bunker.

Combined-Cycle Power Plant 9 lessons

Single-Pressure Combined Cycle

Gas turbine, one-pressure HRSG and steam turbine as one plant.

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Dual-Pressure Combined Cycle

A second pressure level recovers more heat.

Triple-Pressure Combined Cycle

HP, IP and LP steam with reheat: the modern CCPP.

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Combined-Cycle Co-Generation

Electric power plus process steam.

How a gas turbine compresses its air.

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Combustion Chamber

Fuel, air and flame inside a gas turbine combustor.

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Heat Recovery Steam Generator

Natural-circulation HRSG: economiser, evaporator, superheater.

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HRSG with Forced Circulation

Adding a circulating pump to the evaporator loop.

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Stack and Diverter Damper

Switching exhaust between open and combined cycle.

Combined-Cycle Operating Modes 7 lessons

Triple-Pressure Combined Cycle

HP, IP and LP steam with reheat: the modern CCPP.

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HP Turbine Bypass

How HP steam is bypassed during start-up or a trip.

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IP Turbine Bypass

Where hot reheat steam goes when the IP turbine is bypassed.

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LP Turbine Bypass

Dumping LP steam to the condenser.

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Steam Turbine Maintenance Mode

Running the gas turbine while the steam turbine is out.

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Open Cycle Operation

Gas turbine only, exhaust diverted to the bypass stack.

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Stack and Diverter Damper

Switching exhaust between open and combined cycle.

Power Plant Equipment 5 lessons

Cooling Tower (Natural Draft)

Rejecting heat from condenser water.

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Cooling Tower (Induced Draft)

A fan pulls air through the falling water.

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Steam Condenser

Shell-and-tube condenser, hotwell and vacuum.

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Removing dissolved oxygen from feed water.

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Fuel oil storage, unloading and forwarding.

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