Drying + Sterilizing · Minutes, Not Hours

Microwave Vegetable Drying Machine

Instead of heating air and waiting for heat to soak in, microwave energy vibrates water molecules inside the product itself – vegetables dry and are sterilized at the same time in just a few minutes, with color and nutrients intact.

Frequency 2450±50 MHzPower 20-200 kWDehydration 16-200 kg/hDrying time 2-10 minLeakage ≤5 mW/cm²

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Continuous industrial microwave vegetable drying machine tunnel with dried vegetable output

Quick Answer

A microwave vegetable drying machine generates 2450 MHz microwave energy that penetrates the product and makes water molecules vibrate – heat is generated inside the material, so moisture migrates outward and evaporates in 2-10 minutes. The same energy kills bacteria, mold and insect eggs, so drying and sterilization happen in one pass at moderate product temperatures of 70-100°C.

Compared with hot-air drying, microwave lines cut drying time by 50-90%, keep color and nutrients, and need no boiler, gas line or fuel yard – only a 3-phase electricity supply. Models scale from 20 kW (16-20 kg/h) to 200 kW (160-200 kg/h) of dehydration capacity.

2-10 mintypical drying time per pass

16-200 kg/hdehydration capacity by model

70-100°Cgentle product temperature, no scorching

≥99.9%sterilization effect in the same pass

Working Principle

How It Works, Step By Step

Microwave Generation

Magnetrons convert 3-phase power into 2450±50 MHz microwave energy inside shielded steel cavities.

Penetration Heating

Microwaves reach the product’s core: water molecules oscillate 2.45 billion times per second, generating heat inside-out – no surface case-hardening.

Moisture Migration

Internal pressure pushes water vapor to the surface; top exhaust fans remove it immediately, so drying is fast and even.

Sterilization

Thermal and non-thermal microwave effects destroy bacteria, mold and insect eggs in the same minutes-long pass.

Continuous Discharge

The PTFE belt speed (0-4.5 m/min) and microwave power are both adjustable – set the recipe once and the line runs 24 h non-stop.

Machine Structure

Main Components Of The Microwave Drying Machine

Magnetron and cooling fan spare parts of the microwave vegetable drying machine — Core components: industrial magnetron (microwave generator) and forced-air cooling fan of the drying tunnel.

Models

Standard Models & Specifications

Model	Output Power	Dehydration	Sterilization	Belt Width	Dimensions (L×W×H)
MW-20	≥20 kW	16-20 kg/h	180-250 kg/h	500 mm	≈8.6×1.2×2.2 m
MW-40	≥40 kW	30-40 kg/h	380-450 kg/h	800 mm	≈11.0×1.5×2.2 m
MW-60	≥60 kW	48-60 kg/h	500-600 kg/h	800 mm	≈13.2×1.5×2.2 m
MW-100	≥100 kW	80-100 kg/h	1,000-1,200 kg/h	1,000 mm	≈15.6×1.7×2.2 m
MW-200	≥200 kW	160-200 kg/h	2,000-2,500 kg/h	1,200 mm	≈22.6×1.9×2.2 m

All models can be customized: heating source, tray count and chamber dimensions are configured to your product and building.

Technical Data

Technical Specifications

Item	Specification
Heating method	2450±50 MHz industrial microwave, multi-cavity tunnel
Dehydration capacity	16-200 kg/h by model; customized on request
Product temperature	70-200°C controllable (typically 70-100°C for vegetables)
Conveyor belt	Food-grade PTFE / Teflon mesh, speed 0-4.5 m/min (VFD)
Belt width	500-1,200 mm by model
Cooling	Air cooling or water cooling for magnetrons
Microwave leakage	≤5 mW/cm², far below the GB safety limit, shielded observation windows
Control	PLC + HMI touchscreen; non-contact infrared temperature measurement
Power supply	380V/50Hz 3-phase (other standards on request)
Structure	Full food-grade stainless steel, easy-wipe interior

Real Machines

Machine Photos From The Workshop & Customer Plants

Microwave dryer manufacturing workshop with machines on the production line — Microwave drying machines on the assembly line in our manufacturing workshop.

Dehydrated mushroom, greens, chili, pepper and carrot dried as vegetable samples — Dried vegetable samples from microwave lines: mushroom, greens, chili, pepper and carrot.

Quick Quote

Tell Us What You Dry – We Size The Machine

Material and initial moisture content
Target hourly or per-batch capacity
Final moisture spec and product form

Prefer email? Write to info@tondemachine.com or WhatsApp +86 185 0387 4173. Our engineers reply within one working day.

Application Scenarios

Where This Machine Is Used

Because the energy acts on water directly, microwave lines suit any product where speed, color or microbiological safety matter more than the lowest price per kilogram. Typical applications:

Dehydrated Vegetable Factories

Carrot dice, cabbage flakes, scallion rings and spinach reach 6-10% moisture in minutes without the brown edges hot air leaves – color sells dehydrated vegetables.

Spice & Herb Sterilization Lines

Chili powder, pepper, cumin and dried herbs are sterilized (≥99.9% total plate count reduction) and dried simultaneously – no fumigation, no gas treatment.

Edible Mushroom Processors

Shiitake, oyster mushroom and wood ear dry fast at low temperature with aroma kept, and microwave de-enzyming replaces blanching for many lines.

Fruit & Snack Producers

Apple chips, banana chips and puffed fruit snacks: microwave puffing creates crisp texture without deep-frying.

Grain, Seed & Nut Plants

Insect-egg kill and moisture control for beans, oats, nuts and seeds in one short pass before packing.

Meat & Seafood Drying

Small fish, shrimp and jerky strips dry evenly from the inside out, with fat loss far lower than in roasting ovens.

Drying Products

What You Can Dry – Typical Settings

Microwave settings are material-specific: power density, belt speed and exposure time are tuned together. Typical starting points from our test lines:

Product group	Typical materials	Initial moisture	Final moisture	Typical time
Leafy vegetables	Spinach, cabbage, scallion, celery	85-92%	6-10%	3-6 min
Root & bulb vegetables	Carrot, garlic, ginger, onion	75-88%	5-8%	4-8 min
Spices & herbs	Chili, pepper, cumin, mint, chives	10-80%	8-12%	2-5 min
Edible fungi	Shiitake, oyster mushroom, wood ear	85-92%	8-12%	4-8 min
Fruits	Apple, banana, kiwi, strawberry	80-90%	3-8%	4-10 min
Grains & nuts	Beans, oats, peanut, sunflower seed	10-20%	6-10%	2-6 min

Drying Cycles

Typical Batch Times

Vegetable drying3-8 min/pass

Spice sterilization2-5 min/pass

Fruit chip puffing4-10 min/pass

Why This Machine

Why Buyers Choose It

Minutes instead of hours

Microwaves heat the product’s core directly, cutting drying time by 50-90% versus hot air – smaller lines replace large ovens and free up factory space.

Drying and sterilizing in one pass

The same energy that removes water destroys bacteria, mold and insect eggs – no separate sterilization equipment, no chemical fumigation.

Color, aroma and nutrients stay

Product temperature stays at 70-100°C and there is no surface overheating, so green vegetables stay green and vitamins survive.

Electric-only, instant on/off

No boiler, gas line, fuel yard or heat inertia: power and belt speed follow your PLC recipe instantly, and leakage stays below 5 mW/cm² for operator safety.

Get a Custom Layout

Send Your Material Data – Get a Machine Layout & Price

What material are you drying, and at what initial moisture?
What hourly or per-batch capacity do you target?
Your target final moisture and preferred heating source
Your factory space and local power supply

Prefer email? Write to info@tondemachine.com or WhatsApp +86 185 0387 4173. Our engineers reply within one working day.

FAQ

Frequently Asked Questions

How is microwave drying different from hot air drying?

Hot air heats the product surface and waits for heat to conduct inward, which takes hours. Microwaves penetrate the product and generate heat inside the water itself, so moisture leaves in minutes and the product is sterilized at the same time.

Will microwave drying cook my vegetables?

No – with correct power density the product temperature stays at 70-100°C, well below cooking. Infrared sensors feed the PLC, which modulates power to hold the set temperature.

Is microwave leakage safe for operators?

Yes. The tunnel is a continuous shielded steel cavity with choke stops at infeed and outfeed; leakage is measured below 5 mW/cm², in line with the national safety standard, and observation windows are shielded.

Can one machine dry different products?

Yes. Store a recipe per product (power, belt speed, exhaust) on the HMI and switch in seconds. We validate each recipe with a sample test before delivery.

What maintenance does the machine need?

Daily belt cleaning and visual checks; magnetrons are air- or water-cooled with long service life and are replaced as plug-in modules. All wear parts are standard and stocked.

Do you offer small pilot models?

Yes. The 20 kW model (16-20 kg/h dehydration) is our standard pilot line – big enough to prove recipes and economics, small enough for a startup budget.

What capacity should I choose?

We calculate from your material: dehydration load (kg water per hour) = raw input × (initial moisture – final moisture). Send us the material, hourly input and moisture figures and we recommend the model.

How is the machine shipped and installed?

Tunnels ship in standard containers in pre-wired sections; on-site work is positioning, power hookup and exhaust ducting. We support commissioning by video call and provide operation training videos.

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