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Hot Air Tray Dryer

Hot air tray dryer adopts the forced circulation of hot air inside the chamber of the oven. In the drying chamber, hot air rises above and the hot air reaches the top of the chamber. Then, hot air is circulated back to the bottom by a fan installed inside the chamber and hence the optimum amount of heat is achieved gradually inside the oven. The drying is the process that the materials heated in the trays with hot air circle, the wet moisture takes out from material will be exhausted outside at the same time.
  • CT-C


  • 8419399090

  • SUS304/SUS316L/Titanium

  • Food/Pharmaceutical/Chemical

  • Yes


Hot air tray dryer Description

The hot air tray dryer adopts the forced circulation of hot air inside the chamber of the oven. In the drying chamber, hot air rises above and the hot air reaches the top of the chamber. Then, hot air is circulated back to the bottom by a fan installed inside the chamber and hence the optimum amount of heat is achieved gradually inside the oven. Drying is the process in which the materials are heated in the trays with a hot air circle, the wet moisture taken out from the material will be exhausted outside at the same time. the hot air tray dryer is also called hot air oven, hot air circulation oven.

CT-C series hot air tray dryer adopts noise elimination and thermal stable axial flow fan and automatic temperature control system. The entire circulation system is enclosed to make that the heat efficiency of the drying oven increases from 3-7% of the traditional drying oven to 35-40% of the present one. The highest heat efficiency can be up to 50%.

if the materials are heat-sensitive material and need a low-temperature vacuum tray dryer to process them. but if your materials are liquid and also high sugar and also need fast drying speed, please learn Hywell company's high efficient vacuum dryer.

Hot Air Tray Dryer Video

Herb Slice Hot Air Tray dryer Video

Fruit hot air oven

Fruit hot air oven

Herb Slice Dryer

Herb Slice Dryer

Main Parts of Hot Air Tray Dryer 

Food hot air drying oven consists of several main parts like baking trays, fans, heaters, tray carts, and so on.

External cabinet of hot air oven

The External cabinet is made of stainless sheets. It covers the inner chamber.

Glass wool insulation of the hot air tray dryer

The space between the inner chamber and the external cabinet is filled with Glass wool. It provides insulation to the hot air oven.

The inner chamber of the hot air tray dryer

The inner chamber of the hot air tray dryer is made of Stainless steel.

Tubular air heaters of hot air drying oven

Heater help to generate heat within the inner chamber of the hot air oven. electrical heaters are located on the up sides of the fruit hot air drying oven, and the steam heaters are located on the side of the inner of the tray oven.

Motor-driven blower of hot air drying oven

It helps in uniformly circulating the air within the chamber. The fan is the auxiliary part of the fruit hot air drying oven with a power of 0.75kw / set. The materials for manufacturing fans are aluminum alloy or stainless steel.

The temperature sensor of the hot air oven

It measures the temperature within the fruit hot air oven and displays it on the controller screen.

Tray cart of hot air tray dryer

the cart loads the tray and moves inside the food hot air dryer oven, The baking vehicle, and its wheels are made of stainless steel. Their customization is also available.

Tray of the hot air tray oven

Once Shaping Pressed Baking Trays are specially designed auxiliary products for hot air circulation drying ovens. Generally, the baking tray is made with the standard size of 640*460*45mm and it also can be customized according to customers' demands.

Temperature controller of hot air tray dryer

It maintains the accurate temperature during the entire cycle. It also controls the temperature and also displays the temperature values.

Interior of Hot Air Oven

Interior of Hot Air Oven

Tray of Drying Oven

Tray of Drying Oven

Hot air tray dryer specifications


Loading  (Kg)

Fan power (KW)

Heating method

Quantity of Tray cart

Quantity of Tray

Machine size
  (L x W x H) M






Electrical /steam








Electrical /steam








Electrical /steam








Electrical /steam








Electrical /steam





1.Hywell machinery reserves the right to the design without notice

2.All specifications of hot air oven are as accurate as is reasonably possible, but they are not   binding.

Explosion proof type hot air tray dryer

If the dried material is slightly flammable and explosive, Hywell machinery company can design the hot air oven as an explosion-proof type. Regarding the explosion-proof hot air drying oven, it is necessary to use all the instruments and gauges related to the power supply to be explosion-proof. For example, explosion-proof temperature sensors, explosion-proof motors of fans, and control cabinets are either explosion-proof control cabinets or placed in safe areas; and control cables also need to be explosion-proof. In addition to the explosion-proof use of the above instruments; the explosion-proof hot air oven must have an explosion vent. When the pressure of the interior of the machine reaches a certain pressure level, the explosion vent will automatically rupture to prevent danger at the use site. Off course, the explosion-proof drying machine needs to use steam heating or hot water heating.

Explosion proof control system

Explosion proof control system

Explosion vent device

Explosion vent device

Food hot air tray dryer construction material

Hywell Machinery is able to offer our CT series food hot air oven with contact parts to be built in SS304, SS316L, Titanium, Duplex stainless steel, etc. Electrical parts of the control system of the drying machine can be adapted to the customer’s needs.

Hot Air Drying Oven Advantages

Hywell machinery CT series hot air fruit dryer had the following advantages over conventional solutions.

1. Hot air is circulated in the oven to save energy, so the heat efficiency is high.

2. It adopts forced ventilation and an adjustable air distributor, thereby materials in the oven can be dried uniformly.

3. The most common heating sources are offered: steam, electricity, far infrared, or both steam electricity. Generally, electricity is the most economical and convenient way.

4. Hot air fruit drying oven is made of stainless steel, equipped with an axial flow fan, an automatic thermostatic control system, and a computer control system.

5. Low noise, smooth operation, automatic temperature control, easy installation, and maintenance.

6. Wide application. This hot air fruit drying machine can be used to dry a variety of fruits like blueberries, bananas, lime, etc. and it is also applied in the pharmaceutical industry, chemical industry, food industry and etc.

7. Various hot air drying ovens can be customized according to customers' needs.

8. Drying temperature of food drying oven: steam heating 50-130˚C, Max.140˚C.

9. Commonly using steam pressure 0.2-0.8MPa(2-8 bar), if machine heated by steam (steam supplied by client).

10. For operation temperatures of over 140˚C or less than 60˚C, please indicate when ordering.

11. The ovens and baking trays made by our factory are standard dimensions (640x460x45mm), and it can be exchanged with each other.

12. Baking tray also drill a hole if the client has a detailed requirement.

13. Hywell machinery can design and manufacture the explosion-proof hot air oven to dry flammable and explosive materials.

14. Hywell can design a hot air oven that set working time and delaying the turn-off fan so reduce the heater's hot energy gathering inside the hot air chest.

15. Machine materials: AISISUS304, AISISUS316L, and other materials.

16. Highly polished inner and outer surfaces of the machine, no dead comer, easy to clear, no cross-contamination. Confining the requirement of GMP.

Options of hot air tray dryer

1. Electrical components of the hot air tray dryer

it have international brand choices such as ABB, Siemens or Schneider, or others.

2. Steel model of the tray-type hot air oven

Tray-type hot air ovens can choices from SS304, SS316L, Titanium, and Duplex stainless steel.

3. Control system of the hot air tray dryer

it has choices on push button, PLC+HMI, and so on.

4. Heating method of the hot air tray dryer  

it is very flexible. it can configure based on the customer site conditions, such as steam, and electricity.

5. Cooling function of the hot air tray dryers

If it is without a heating system, the tray-type oven can be a cooler to make particles with cooling air.

Hot Air Tray Dryer Application:

The hot air circulating drying oven is suitable for the material and product hot solidification and dry de-watering in the pharmaceutical, chemical, food, farming side-product, aquatic product, light industries, heavy industries, and others industries. Such as raw material medicine, crude drugs, prepared herbal medicine of Chinese traditional medicine, plaster, powder, particle, drinking agent, pills, packing bottles, pigment, dyestuff, dewatering vegetables, dried fruit pieces, sausage, plastics, resin, electric component and etc.

if the materials is heat sensitive material,and it need low temperature dryer to process it. 

Benefits of Using a Hot Air Tray Dryer

Hot air tray dryers offer several advantages over other drying methods. Some key benefits include:

  1. Efficient Drying

    The forced convection mechanism and uniform air circulation ensure quick and efficient drying of materials.

  2. Versatility

    Hot air tray dryers can handle a wide range of materials, including powders, granules, crystals, and even delicate products.

  3. Cost-effective

    These hot air tray dryer machine are energy-efficient and can reduce drying time, resulting in cost savings for industrial processes.

  4. Easy Operation

    Hot air tray dryers are designed for user-friendly operation, with simple controls and easy maintenance.

  5. High-Quality Output

    The controlled drying conditions in tray dryers help maintain the quality, color, and texture of the dried products.

Maintenance and Safety Tips for Hot Air Tray Dryers

To ensure the optimal performance and longevity of your hot air tray dryer, follow these maintenance and safety guidelines:

  1. Regular Cleaning

    Clean the trays, drying chamber, and air circulation system regularly to prevent the buildup of debris or contaminants.

  2. Inspections

    Conduct routine inspections of the heating system, fans, motors, and electrical connections to detect any signs of wear or damage.

  3. Lubrication

    Lubricate the moving parts of the dryer as recommended by the manufacturer to reduce friction and maintain smooth operation.

  4. Safety Measures

    Implement safety precautions, such as proper grounding, installation of safety guards, and regular calibration of temperature and pressure controls.

  5. Training and Documentation

    Provide training to operators on the safe operation and maintenance procedures of the hot air tray dryer. Keep records of maintenance activities and repairs for reference.

How to Use a Hot Air Tray Dryer Effectively

To achieve optimal results when using a hot air tray dryer, follow these guidelines:

  1. Prepare the Material

    Ensure that the material to be dried is properly prepared. This may involve slicing fruits or vegetables, grinding powders to a specific particle size, or arranging items evenly on the trays.

  2. Load the Trays

    Place the prepared material evenly on the trays, taking care not to overload them. Leave sufficient space between the items to allow for proper airflow.

  3. Set Drying Parameters

    Adjust the temperature, airflow rate, and drying time according to the requirements of the material being dried. Refer to the manufacturer's guidelines or consult with experts if necessary.

  4. Monitor the Drying Process

    Regularly check the progress of drying by inspecting the moisture content and appearance of the material. Make adjustments to the drying parameters if needed.

  5. Rotate the Trays

    If your hot air tray dryer has a rotating feature, consider rotating the trays during the drying process. This helps ensure uniform drying across all trays and prevents uneven moisture distribution.

  6. Avoid Overdrying

    Be cautious not to overdry the material, as it can lead to loss of quality or undesirable changes in texture or taste. Regularly check the moisture content and remove the material from the dryer once the desired level is reached.

  7. Cool Down the Material

    After the drying process is complete, allow the material to cool down before packaging or further processing. This helps prevent moisture absorption from the surrounding environment.

  8. Clean the Dryer

    After each use, clean the trays, drying chamber, and air circulation system to remove any residues or contaminants. Follow proper cleaning procedures recommended by the manufacturer.

Troubleshooting Common Issues with Hot Air Tray Dryers

Sometimes, issues may arise during the operation of a hot air tray dryer. Here are some common problems and possible solutions:

  1. Uneven Drying

    If you notice uneven drying across the trays, check for blocked air vents or inadequate airflow. Ensure that the trays are loaded evenly and not overloaded.

  2. Insufficient Drying

    If the material is not drying as expected, verify that the temperature and airflow settings are appropriate for the specific material. Adjust them if necessary.

  3. Excessive Drying Time

    If the drying process takes longer than anticipated, inspect the heating system and check for any malfunctions or inadequate power supply. Also, confirm that the material thickness and quantity are within the dryer's capacity.

  4. Temperature Fluctuations

    If the temperature fluctuates excessively during operation, examine the temperature control system for any faults or sensor malfunctions. Calibrate or replace components as needed.

  5. Safety Issues

    If you encounter any safety concerns, such as overheating, electrical problems, or abnormal smells or noises, immediately turn off the dryer and seek professional assistance for inspection and repairs.

FAQs (Frequently Asked Questions)

  1.  Can hot air tray dryers handle heat-sensitive materials?

    Yes, hot air tray dryers can be designed to accommodate heat-sensitive materials by incorporating temperature control and gentle airflow settings.

  2. Are hot air tray dryers suitable for drying liquids or slurries?

     Hot air tray dryers are primarily designed for drying solid materials. Drying liquids or slurries may require additional equipment such as spray dryers or rotary atomizers.

  3. How do I ensure the safety of operators when using a hot air tray dryer?

    Implement safety measures such as providing protective gear, training operators on safe operating procedures, and regularly inspecting the dryer for any potential hazards.

  4. Can I use hot air tray dryers for batch or continuous drying processes?

    Hot air tray dryers are commonly used for batch drying processes. However, certain models can be modified for continuous or semi-continuous drying operations.

  5. How do I determine the drying time for my specific material?

     The drying time depends on various factors such as the initial moisture content, material type, thickness, and desired moisture level. Conduct small-scale tests or consult with experts to establish the optimal drying time.


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