- 01Edible oil production has three plant stages: seed preparation & expelling, solvent extraction of the residual cake, and refining of crude oil to edible grade.
- 02Solvent extraction plants use hexane and are hazardous-area (ATEX/flameproof) facilities — layout and electrical classification are safety-critical.
- 03Refining (degumming, neutralising, bleaching, deodorising) is a piping- and heat-integration-heavy process best coordinated in 3D.
- 04A federated BIM model ties process, piping, structure, and hazardous-area electrical together — essential for a compliant, buildable oil plant.
An edible oil complex is really three plants in one — a preparation and expelling section that mechanically squeezes oil from seed, a solvent extraction plant that recovers the remaining oil from the cake using hexane, and a refinery that turns crude oil into a clear, stable, edible product. Each has very different engineering demands, and one of them — solvent extraction — is among the most hazardous processes in food manufacturing. Edible oil mill plant design is as much about safety and piping integration as it is about process.
The three stages of an oil complex
- 01Seed preparation
Cleaning, cracking, dehulling, conditioning (heating), and flaking prepare the seed so oil cells rupture and release oil efficiently.
- 02Mechanical expelling
Screw presses (expellers) squeeze the bulk of the oil out, leaving a cake with residual oil.
- 03Solvent extraction
The cake is washed with hexane in an extractor to recover residual oil; the miscella (oil+solvent) is distilled to recover solvent, and the meal is desolventised.
- 04Crude oil refining
Degumming, neutralisation, bleaching, and deodorisation remove gums, free fatty acids, colour, and odour to produce refined edible oil.
Piping and heat integration in refining
The refinery is dense with piping: crude and refined oil, steam, thermal fluid, vacuum, and cooling water all thread between vessels, heat exchangers, and the deodoriser. Heat integration — recovering heat from hot streams to preheat cold ones — cuts energy cost significantly but multiplies piping complexity. This is classic 3D-piping territory, where a coordinated model prevents the clashes and access problems that plague 2D-designed refineries.
- Hazardous-area zoning and electrical classification coordinated with equipment layout.
- Dense process piping with heat integration modelled in 3D for clash-free routing and maintainable valve/instrument access.
- Structural steel for elevated extractors, distillation columns, and the deodoriser coordinated with piping and platforms.
- Meal handling and finished-oil storage integrated with the process areas and truck/rail load-out.
End-to-end oil plant engineering
From seed prep through refining, an edible oil complex spans process, piping, structural, and hazardous-area electrical engineering. Spetia Engineering delivers these disciplines in one coordinated model, so safety classification, piping routing, and structure all agree — the foundation of a plant that passes commissioning without costly rework.
