An electric drying oven is a device that uses the principle of hot air circulation to dry materials. It is made of high-quality stainless steel, featuring corrosion resistance, high temperature tolerance, and strong durability.
The SL-C series drying oven features an axial fan and an automatic constant-temperature control system, achieving over 95% thermal efficiency. It uses convective heat transfer to warm the air. Fresh air is continuously supplied through the air intake, while moist exhaust air is removed by a dehumidification system. This constant renewal of fresh air and removal of moisture maintains the optimal relative humidity inside the chamber. A key feature of this series is the partial recirculation of hot air within a fully enclosed system, which enhances heat transfer and saves energy.
Shuliy offers five different models of electric drying ovens to meet a variety of drying needs. Each model is thoughtfully designed with a wide loading capacity, handling between 60 kg and 480 kg of material per batch. These ovens are suitable for production lines of different scales and output levels, helping customers achieve efficient and consistent drying results.
Working Principle of the Hot Air Circulation Drying Room
It uses a high-temperature circulating fan to force hot air—heated by electric heating tubes or a steam heat exchanger—to circulate inside the chamber. The circulating hot air fully contacts the material, carrying away moisture from its surface. The dehumidification and exhaust system then discharges the moist air, and the drying process continues until the material reaches the preset drying standard.
The structure of the drying oven
The equipment is composed of a box, a hot air circulation system, a heating system, an electrical control system, a dehumidification system, a drying trolley, and drying trays etc.
Main box
The box is an integral structure, and the fan and control cabinet are in the upper right corner of the box. The appearance is made of stainless steel plates and is precisely polished. The whole set of equipment has a beautiful appearance, reliable structure, no deformation, and is especially easy to clean. The insulation layer of the box body is made of basalt insulation cotton, which has the advantages of little influence on the ambient temperature of the workshop during work, good heat insulation effect, low heat loss, energy-saving and lower consumption.
Heating system
The heating method adopts electricity, steam, natural gas, and multiple heating methods. The element adopts a stainless steel fin heat exchanger, which has fast heat transfer and a superheats exchange area, which improves the working efficiency of the whole machine and prolongs the use time of the equipment.
Hot air circulation system
In order to increase the number and air volume of hot air circulation in the box, and to improve the uniformity of the temperature in the box, two circulating fans are installed on the right side of the box. The fan adopts a dynamic balance process to ensure high-speed rotation without jitter and noise. All corners in the box adopt a circular arc structure, which can not only prevent the hot air from forming dead corners but also increase the air volume.
Dehumidification system
A 0.37kw dehumidification fan is installed at the air outlet, and the start and stop are controlled by a temperature control meter and a time relay. The damper opens automatically when the wet fan is turned on and closes automatically when it stops.
Electrical control system
The temperature adopts PID automatic control, an automatic alarm for over-temperature, and stops heating at the same time. All low-voltage electrical components are of well-known brands. The complete set of electrical control systems has a high degree of accuracy, stable working performance, concise and intuitive operability, and long service life, which provides a favorable guarantee for the normal production of users.
Trolley and baking tray
Equipped with a stainless steel trolley, according to the standard size of 710 × 950 × 1390 (mm), 12 layers, the trolley is equipped with high-temperature resistance and corrosion-resistant nylon wheels. Each trolley has the characteristics of firm structure, flexible operation, beautiful appearance, and easy cleaning. Each car is equipped with 48 stainless steel trays. The unified specifications of the trays are 460×640×45 (mm). They are formed by one-time stamping, with a beautiful appearance, no sharp angles, and high strength.
Applications of the drying oven
This fruit drying oven from Shuliy Machinery is suitable for hot solidification and drying/dewatering of materials and products in various industries, including:
- Pharmaceutical Materials: Medicinal raw materials, Crude drugs, Traditional Chinese medicine preparations, Herbal pieces, Pills…
- Chemical Materials: Plaster, Powders, Granules, Pigments, Dyes, Resins, Baking varnish…
- Food Products: Plaster, Powders, Granules, Pigments, Dyes, Resins, Baking varnish
- Packaging and Others: Packing bottles, Electronic components, Plastics
- Other Materials: Various other materials
Factory display of the drying oven
Parameter of the drying oven
| Model | SL-C1 | SL-C2 | SL-C4 | SL-C6 | SL-C8 |
| Trolley number | 1 | 2 | 4 | 6 | 8 |
| Trays number | 24 | 48 | 96 | 144 | 192 |
| Loading quantity(kg) | 60 | 120 | 240 | 360 | 480 |
| Electric heating power(KW) | 6-9 | 15 | 30 | 45 | 60 |
| Fan power(KW) | 0.45 | 0.45 | 0.45*2 | 0.45*3 | 0.45*4 |
| Effective volume(M2) | 1.3 | 2.6 | 4.9 | 7.4 | 10.3 |
| External size(mm) | 1410*1200*2140 | 2250*1200*2160 | 2250*2160*2160 | 3290*2160*2200 | 4360*2160*2270 |
In addition, we support non-standard customization, such as power voltage, capacity, and controller, to provide you with the most cost-effective solution.
Product Advantages
Corrosion-Resistant, Heat-Resistant, and Long Service Life
Made entirely of high-quality stainless steel with a smooth and hygienic surface, the dryer offers excellent rust and corrosion resistance. It is easy to clean and maintain, with optional thickened steel plates for enhanced durability. The service life can reach up to 10 years or more.
Uniform Drying and High Yield
The efficient hot-air circulation system ensures even temperature distribution inside the chamber, allowing materials to be heated uniformly. This results in stable drying quality, excellent product appearance, and a significantly higher yield rate.
Fully Enclosed Structure
The drying process produces no exhaust gas or waste materials, ensuring a clean working environment and compliance with environmental standards.
Easy Operation with Intelligent Control
Equipped with an advanced PLC intelligent control system, the dryer features an intuitive interface for quick setting of temperature, time, and other parameters. Fully automated operation reduces the need for manual intervention.
Wide Range of Applications
Suitable for the food, pharmaceutical, chemical, and electronics industries, meeting high hygiene and performance standards across multiple sectors.
Precise Temperature Control
The dryer is equipped with a high-sensitivity temperature control system and intelligent sensors that monitor temperature changes in real time. It automatically adjusts the heating power to ensure that temperature fluctuations are kept within ±1°C.
Explosion-Proof Design
Both the interior of the drying chamber and the electrical control system feature explosion-proof designs. Key components are equipped with explosion-proof motors, explosion-proof lamps, and explosion-proof control elements, effectively preventing explosion risks in high-temperature and high-humidity environments.
Multiple Heating Options
Available in both electric heating and steam heating models.
The electric type uses energy-saving quartz infrared tubes, while the steam type is equipped with high-efficiency copper radiators that offer long service life and excellent heat transfer performance.
Purchase Considerations for Stainless Steel Drying Oven
1. Confirm the Heating Source
Choose a suitable heating method—such as steam, heat transfer oil, electric heating, or far-infrared—based on your production conditions, and ensure the site can supply the required energy source.
2. Specify Temperature Requirements
Clearly state the desired operating temperature range. If the required temperature is above 140°C or below 60°C, inform the supplier in advance for non-standard customization.
3. Match Capacity and Size
Select the dryer size and number of layers according to your daily drying output, and confirm the quantity and specifications of trays and trolleys.
4. Select the Control System
Choose between an automatic control system or a PLC computer control system according to your automation needs and operator skill level.
5. Material and Thickness
Confirm the stainless steel grade (e.g., 304 or 316) and plate thickness. Thicker plates cost more but offer better durability and longer service life.
6. Installation Space and Conditions
Ensure that the installation site meets the equipment size, ventilation, and moisture exhaust requirements, with extra space reserved for maintenance.
8. Safety Features
If the drying process involves flammable or explosive materials, opt for an explosion-proof model and confirm the required explosion-proof rating.
Related Machine Recommendations
We also have another model of a heat pump drying room, made of steel plates with thermal insulation of rock wool. If you would like to know more, please feel free to contact us for further information.
FAQ
Which industries and materials is this drying oven suitable for?
Suitable for food, pharmaceutical, chemical, and electronics industries. Can dry fruits, vegetables, herbs, pills, powders, granules, packaging bottles, and other materials, meeting high hygiene and performance standards.
How does the hot air circulation system ensure uniform drying?
The oven features an efficient hot air circulation system with high-speed fans, ensuring even airflow throughout the chamber so that materials are heated uniformly, improving product quality and yield.
What heating options are available?
Two models are available: electric heating and steam heating. The electric model uses energy-saving quartz infrared tubes, while the steam model is equipped with high-efficiency copper radiators for stable and efficient heating.
How precise is the temperature control?
The oven uses a high-sensitivity PID temperature control system that monitors the temperature in real time and automatically adjusts heating power, keeping temperature fluctuations within ±1°C for accurate drying.
Does the drying process produce exhaust gas or waste?
No. The fully enclosed structure ensures no exhaust gas or waste during drying, maintaining a clean production environment and complying with environmental standards.
What are the specifications for racks and trays?
Standard racks measure 710×950×1390 mm with 12 layers. Each layer holds 48 stainless steel trays sized 460×640×45 mm, made with one-piece stamping. The trays are high-temperature resistant, corrosion-resistant, and easy to clean.
How to choose the appropriate model?
Select a model based on daily production volume and material load, ranging from SL-C1 to SL-C8, with capacities from 60 kg to 480 kg per batch. Customization is also available for tray quantity and chamber size.
Does the oven support automated operation?
Yes. It can be equipped with a touchscreen or PLC intelligent control system to automatically set temperature, time, and drying parameters, reducing the need for manual operation.
How is safety ensured?
Both the drying chamber and electrical system are explosion-proof. Key components include explosion-proof motors, lights, and control elements, effectively reducing risks in high-temperature and high-humidity environments.
What is the service life and maintenance requirement?
Made of high-quality stainless steel, the oven is corrosion-resistant and heat-resistant, with a service life of up to 10 years. Routine maintenance only requires cleaning the chamber and trays, and periodically inspecting fans, electric heating tubes, or steam radiators.