Safe Desolventization and Meal Conditioning: DC Series Toasters for Modern Oil Extraction Plants

After plant oil extraction with solvent (technical hexane), meal contains 25–35% volatile hydrocarbons. The key task of meal distillation and processing is complete solvent recovery with reduction of its residual concentration in the final product to a safe level (< 300 ppm) and preservation of feed protein.

D.ENERGY designs and manufactures vertical desolventizer-toaster units of DC series with various capacities — from 200 to 2,000 tons of meal per day.

Technological features of DC series design:

• Multi-stage steaming: alternation of blind and live steam in the lower toaster chambers ensures intensive hexane distillation without over-drying meal fibers.

• Individual level regulators: each column stage is equipped with pneumatic-driven dampers and raw material level sensors connected to a single process control system and automation panels, preventing solvent vapor breakthrough.

• Energy-efficient vapor discharge: vapor collector geometry is calculated to minimize meal dust carryover to the plant condensing systems.

Use of DC toasters in combination with hermetic pumping equipment for miscella minimizes hexane production losses per ton of processed seed and meets strict ATEX explosion safety standards.