Roast-O-Dry™ infrared rotary roaster and dryer
Continuous rotary processing for nuts, seeds, spices and grain. Shortwave infrared heating in a rotary drum, first‑in first‑out flow, no chemicals and no water.
Key features
- Rotary drum, continuous first‑in first‑out flow
- Shortwave infrared heating
- PLC control with recipe storage per product
- Food-grade stainless steel contact surfaces
- Castor mounted with levelling feet — no civil foundation
- Full access for cleaning and product changeover
- No chemicals, no fumigants, no water
- 415 V, 3-phase, 50 Hz
Sizes and throughput
| Drum internal diameter | Drum length | Connected load |
|---|---|---|
| 750 mm | 1500 mm | 25 kW |
| 1000 mm | 1500 mm | 30 kW |
| 1200 mm | 1800 mm | 60 kW |
Capacity is not a function of drum volume. It is governed by the internal geometry, which is specified for the material — a larger drum carries a deeper charge and needs proportionally more heat, which is why the load does not scale with size. Specifications are varied to suit the application.
Throughput
Throughput is quoted against your material, because no single figure applies. It depends on bulk density, initial moisture and the dwell time the product needs — and those three vary more between products than the machine does.
Tell us the material, the moisture you start at and the moisture you need, and we will size the machine to it.
Infrared vs hot-air roasting
- A burner or heater warms a large volume of air
- A fan moves the air through the product
- Heat is lost through ducts, leaks and exhaust
- Energy travels straight from emitter to product
- Shortwave penetrates, so the piece heats within
- Instant on and off: quick changeover
Infrared vs hot-air roasting: full explanation
A conventional roaster or dryer works by convection. A burner or heater raises the temperature of a large volume of air, a fan moves that air through the product, and the air gives up its heat on the way past. The air is the carrier, and the carrier has to be heated first.
Infrared is radiant. Energy travels from the emitter to the material directly. There is no medium in between, and 4 things follow.
No medium to heat
Energy goes straight into the product, with no volume of air to heat and blow through it.
No loss through the carrier
Convective systems lose heat through ducting, leakage and exhaust, because the air must be moved and moved air escapes.
Instant heat
Emitters reach working output immediately. There is no warm-up period while a mass of air comes up to temperature.
Quick start, stop and changeover
Switch off and the heat stops. A convective system holds its heat in the air and the ductwork, so the plant must cool before the next product goes through.
For a processor running several products in a shift, the last of those is often worth more than the energy saving.
Why shortwave infrared
The emitters are shortwave. Shortwave infrared penetrates further into the material than medium or long wave, so the heat is developed within the piece as well as at its surface. That is what allows the drum to run without scorching the outside to dry the inside.
Rotary drum design
- The face towards the heaters takes the energy
- The top scorches before the bottom is done
- So belts run long and slow
- Every particle is lifted, carried and dropped
- The whole charge is presented to the field
- Heated length wrapped into a drum: a fraction of the floor
Rotary drum design: full explanation
A flat bed or belt carries the product in a static layer. The surface facing the heaters takes the energy; the layer underneath takes what reaches it. Even at low bed depths the top scorches before the bottom is done, which is why belt roasters run long and slow.
A drum turns the material continuously. Every particle is lifted, carried and dropped, so each one is presented to the radiant field over and over through the whole pass.
- Continuous first‑in first‑out flow — no batch sits longer than another, and nothing carries over
- The whole charge is presented to the field, including the bottom layer
- The heated length is wrapped into a drum, so the machine occupies a fraction of the floor a belt of equivalent dwell time would need
Heater monitoring and safety
Condition monitored
Heater condition is monitored continuously. A failed heater stops the feed, the drum and the heating together, so no material passes through an under-heated machine.
Breakage contained
An infrared emitter is a quartz envelope. If one breaks, the machine stops before further material passes it, so anything that has entered the product is confined to the charge in the drum at that moment and does not carry into what follows.
Life monitored
Heater life is monitored, and an alarm is raised at the rated replacement interval.
Life monitoring matters most. A failed heater is obvious; one still drawing power but down to three-quarters of its rated output is not, and the product comes out under-processed in a way that shows only after packing.
Tested with your product before dispatch
We do not keep a demonstration machine. Every machine is built against an order. When yours is complete and before it leaves our works, we run your material through it, to your parameters, and you take the product away for your own testing. What you assess is the machine you are buying, in its own size and configuration.
Need UV-C sterilization as well? The same drum is available as SpectraCure IR-UV™.
Questions buyers ask
What is Roast-O-Dry?
A continuous infrared rotary roaster and dryer for nuts, seeds, spices and grain. Shortwave infrared heats the product in a rotary drum with first-in first-out flow.
What sizes and power does it come in?
Drum internal diameter and length with connected load: 750 × 1500 mm, 25 kW; 1000 × 1500 mm, 30 kW; 1200 × 1800 mm, 60 kW. It runs on 415 V, 3-phase, 50 Hz. Specifications are varied to suit the application.
What is the throughput?
Throughput is quoted against your material, because no single figure applies. It depends on bulk density, initial moisture and the dwell time the product needs. Tell us the material, the moisture you start at and the moisture you need.
Does it need a foundation?
No. It is castor mounted with levelling feet, so there is no civil foundation.
Does it use chemicals or water?
No. There are no chemicals, no fumigants and no water.
Why infrared instead of hot air?
Infrared energy goes straight from the emitter to the product. There is no air to heat first, so there is no warm-up and no heat lost through ducts and exhaust. The heat stops when you switch off, which makes changeover quick.
How does it handle changeover between products?
The controller stores a recipe for each product, and the machine gives full access for cleaning and product changeover.
How do I get a quote?
Call or WhatsApp +91 94160 55854, or send the quote request on the Contact page. Tell us the material, how much per hour and when you need it. We read every complete enquiry ourselves.
Request a quote for Roast-O-Dry™
Tell us the product, the moisture you start at, the moisture you need and the throughput, and we will size the machine to it.
A.B. Plastech · Modern Industrial Estate, Bahadurgarh, Haryana
pawar@abplastech.co.in
abautomech@hotmail.com