Industries · Food

Pneumatic conveying and bulk handling systems for food plants

Scorpio Engineering BMH designs, manufactures and installs turnkey pneumatic conveying systems for flour, sugar, milk powder, coffee beans and other food ingredients: bulk tanker unloading, silo storage, conveying to mixers and process lines, and weighing and batching, with stainless steel contact parts and PLC and SCADA control.

Installed at India’s largest biscuit makers, dairy cooperatives and global food groups.

Scorpio flour storage silos being erected at a biscuit plant
Flour storage silos going up at a biscuit plant.

Food ingredients we handle

Not on the list? See all materials handled or send us your ingredient and we will tell you how we have conveyed it before.

A typical flour handling system

This is the layout of a flour plant we built for a biscuit manufacturer: flour arrives by bulk tanker, is stored in silos and conveyed to filter receivers above the process lines.

Flowsheet of a flour handling system: bulk tanker unloading, two storage silos on load cells, dehumidified Roots blower conveying and four filter receivers
  1. Tanker unloadingA Roots blower pressurises the bulk tanker and conveys the flour up into the storage silos.
  2. Silo storageSilos on load cells, with bin vent filters on top and bin activators at the outlet, keep flour moving and the stock always known.
  3. Dry conveying airA dehumidifier dries the conveying air, so flour does not pick up moisture or cake in the line.
  4. ConveyingRotary airlocks and line injectors feed each conveying line; a standby blower keeps production running.
  5. To the processHeavy duty diverters route the flour to filter receivers above each mixer or process line.

Equipment and systems for food plants

Food installations

India’s largest biscuit maker

Maida bulk handling for a biscuit plant

Scorpio built a 10 TPH bulk tanker unloading system feeding two 80-tonne flour silos on load cells. Flour is conveyed at 4 TPH with dehumidified air to four filter receivers above the process, with a standby blower and PLC and SCADA control.

Large dairy cooperative

Dense phase conveying of milk powder

Scorpio supplied dense phase conveying for whole and skimmed milk powder at 4 TPH, moving the powder gently at low velocity to protect its quality.

Global food and beverage group

Dense phase conveying of tea

Scorpio supplied a 6 TPH dense phase conveying system for tea powder, moving it slowly in dense slugs so the leaf is not broken down.

Leading packaged foods company

Stainless steel conveying equipment

For food contact duty, Scorpio builds hoppers, rotary valves and filter receivers in stainless steel, with quick-release clamps for easy cleaning.

Coffee roaster, South India

Green coffee bean storage, blending and batching

Scorpio conveys green coffee beans at 5 TPH in dilute phase, through a 10-way diverter, into a 90 m³ bolted silo with ten compartments, each with its own ultrasonic level sensor and pneumatic slide gate. The compartments discharge into a weigh hopper on load cells, so blends are batched by weight, and each batch is conveyed 26 m back to the process line. Scorpio designed, built, erected and commissioned the complete system, including the silo structure, Roots blower, rotary airlock, bag filter and VFD panel.

Roots blower package and control panels for a Scorpio flour conveying system
Roots blower package and control panels for flour conveying.
SCADA screen of a Scorpio maida conveying system showing tanker, Roots blower, silos and weigh indicator
The SCADA screen of a maida conveying system.
Stainless steel filter receiver with pulse jet valves for food powders, by Scorpio
Stainless steel filter receiver with pulse jet cleaning.
Stainless steel hopper and rotary valve for a food plant, by Scorpio
Stainless steel hopper and rotary valve.
Ten-compartment green coffee bean silo by Scorpio being lifted into place by crane
A 90 m³ ten-compartment coffee bean silo going up in one lift.
Multi-compartment coffee bean silo discharging into a weigh hopper, by Scorpio
The silo compartments discharge into a weigh hopper for blending.
Pneumatic slide gates and level sensors under each coffee silo compartment, by Scorpio
A pneumatic slide gate under every compartment.
Weigh hopper on load cells with weight indicator and rotary valve feeding the coffee bean conveying line, by Scorpio
On site at the weigh hopper, which batches each blend by weight.

Frequently asked questions

Can flour be unloaded straight from a bulk tanker into silos?

Yes. A Roots blower pressurises the tanker and conveys the flour pneumatically into the storage silos through a closed pipeline, with no bags and no manual handling.

How do you stop flour caking in the conveying line?

We dry the conveying air with a dehumidifier before it reaches the blower, so the flour does not pick up moisture. Bin activators at the silo outlets keep it flowing.

Dilute or dense phase for food powders?

Flour and sugar are usually conveyed in dilute phase with a Roots blower. Fragile or high-value powders such as milk powder and tea are better suited to dense phase, which moves them slowly and gently.

Can coffee beans be conveyed pneumatically?

Yes. Green coffee beans are hard and free flowing, and are conveyed in dilute phase with a Roots blower and rotary airlock. Roasted beans are brittle, so we convey them in dense phase, slowly, to avoid breakage. A multi-compartment silo with a slide gate under each compartment and a weigh hopper on load cells lets you keep different beans or roasts apart and batch blends by weight.

Do you supply stainless steel equipment?

Yes. Hoppers, rotary valves, filter receivers and other food contact parts can be built in stainless steel, with quick-release clamps for cleaning.

Can one silo feed several mixers?

Yes. Heavy duty diverters route each conveying line to filter receivers above several mixers or process lines, controlled from the PLC.

How do I get a quote?

Email marketing@scorpiobmh.com with your ingredients, capacity in tonnes per hour, conveying distances and how they arrive (bags, big bags or bulk tankers). We reply with a system concept and budget.

Planning a new food plant or more silo capacity?

Tell us your ingredients and rates. We design, manufacture, install and commission the complete system.