Industrial Belt Dryer

Nanjing Huozao Machinery Technology Co., Ltd. is one of the leading manufacturers and suppliers of industrial belt dryer in China. With abundant experience, we are committed to providing high quality equipment made in China with competitive price. Welcome to wholesale customized industrial belt dryer from our factory.

Working principle

 

After being distributed by the feeder, the material is evenly spread onto a continuously moving mesh belt. The mesh belt uses a 20-100 mesh screen and is driven by a transmission chain to move slowly within the drying chamber. Hot air, driven by a fan, circulates through a heat exchanger, convection walls, and air ducts within the drying chamber in a through-flow manner. The dry, hot air absorbs moisture from the material, and the continuously converted humid, hot air is discharged outdoors through a dehumidification device. As the moisture decreases, the material gradually dries, and the mesh belt moves slowly. The operating speed can be freely adjusted according to the material's moisture content. The dried product continuously falls into the collector.

The industrial belt dryer has one heating unit with independent hot air circulation. Moisture is discharged through the exhaust port via a dehumidification fan, and the amount of discharged moisture is controlled by a regulating valve. In each circulation unit, circulating air enters the drying unit through a side air duct, is heated by a heater, and is then blown at a uniform speed by a fan onto the mesh belt, passing through the material and entering the upper chamber.

The material drying process involves hot air flowing through the material layer, completing the transfer of heat and mass. The chamber is connected to air outlets by ducts, with most of the gas circulating. A portion of the gas, which is cooler and has a higher moisture content, is discharged as waste gas through exhaust pipes, regulating valves, and exhaust fans. In each circulation unit, the air from the circulating fan first enters the middle chamber, is heated upwards by the heater, passes through the material layer, and enters the upper chamber. The upper chamber is connected to the fan by side air ducts and return air pipes, with most of the gas circulating and a portion being discharged. This cycle repeats continuously, achieving uniform and rapid drying.

1. The industrial belt dryer is a through-flow heating, continuous operation drying equipment, characterized by fast drying speed, high evaporation intensity, and large drying output.

2. In the drying process, hot air flows obliquely upwards through the material layer laid on the mesh belt, increasing the contact area between the material and the hot air, thus improving the drying speed.

3. The machine adopts an internal circulation air supply device. Hot air is delivered into the drying chamber through a heat exchanger. The entire system is closed, which improves the relative speed of material-hot air exchange and ensures the uniformity of drying.

4. The machine consists of a drying chamber, a transmission speed regulation system, a conveying system, a hot air circulation system, a heating system, a dehumidification device, and an electrical control system.

5. The entire internal structure of the machine is made of high-quality stainless steel plates and is fully enclosed. Except for the dehumidification duct, there are no external air ducts, thus ensuring that the material is not contaminated and that the heat source utilization rate is high, saving energy.

6. The dryer employs a unique circulating air system with 10 axial flow fans. This system enhances the convection velocity between the material and hot air, ensuring uniform drying.

7. The industrial belt dryer features one heating unit with automatic temperature control.

8. The conveyor chain is a double-pitch stainless steel ball bearing chain, and the conveyor belt is 800cm wide with a 20-100 mesh mesh (mesh size can be adjusted based on material shape or density). A stainless steel Φ32×2.0mm round tube is placed approximately every 200mm at the bottom of the conveyor belt to prevent deformation due to excessive material weight, maintaining belt flatness. A 200mm clearance is provided at the bottom of the dryer to allow small amounts of material to fall during operation, facilitating cleaning and collection after production.

9. Side doors are located on both sides of the dryer for easy maintenance, observation of material drying, and cleaning of the working chamber.

10. The transmission system has changed from the traditional speed limiting method to frequency converter speed control (the traditional transmission method uses a speed-regulating motor with electromagnetic speed control, one set in total. Because speed-regulating motors themselves have drawbacks such as high noise, unstable operation, and inaccurate speed settings, they affect the transmission effect and increase the equipment maintenance rate. Frequency converters, on the other hand, have arbitrary adjustment capabilities and can directly change the motor's operating frequency, resulting in stable operation and no noise).

11. The dryer's exhaust port is equipped with two exhaust fans; the exhaust port above each heating section is connected to the exhaust fans via pipes for centralized dehumidification.

12. The electrical control system is an independent control cabinet, capable of both local and remote control; it uses intelligent instrument control; this instrument has the advantages of high temperature control accuracy, good shock and interference resistance, integrated temperature sampling and adjustment, and control output; the entire temperature control system has timed constant temperature, timed dehumidification, and timed shutdown functions.

13. The dryer's insulation layer is 100mm thick, made of high-quality microfiber cotton. Due to the low density of this insulation cotton, the entire insulation layer is tight and thick, ensuring excellent insulation performance and saving energy.

14. The side door seal is made of heat-resistant food-grade silicone rubber strips, and the door lock uses a lever-type locking mechanism.

15.The main frame and reinforcement of the machine are made of 45*75*2 stainless steel square tubing, while the parts in contact with materials are made of 304 stainless steel.

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