Continuous Fluidized Bed Dryer

Continuous Fluidized Bed Dryer Overview

The continous fluidized bed dryer is a high-efficiency, energy-saving drying system designed for large-scale production, particularly suitable for processes requiring evaporation rates exceeding 300 kg/h. By optimizing both airflow and material movement, the equipment ensures full fluidization of the product within the drying chamber, leading to highly efficient moisture removal.

The Hywell Machinery continuous fluid bed dryer is a new technology developed on the basis of the static fluidized bed dryer. Mechanical shaking is added to the fluidized bed dryer. The material has been fed into the shaking fluid bed dryer, under the dual function of the shaking and airflow, the material moves along the fluidized bed as thrown forward continuously. Hot air upward through the fluidized bed and wet materials from the heat after the exchange. Our company not only has a vibrating fluidized bed dryer, but it also has a fluidized bed granulator.

This fluidized bed dryer demonstrates outstanding performance in industries such as food processing, chemicals, and pharmaceuticals. In particular, it excels in applications like salt drying, where it can handle processing capacities of over 20 tons per hour. In some cases, a single unit can achieve an output of up to 30 tons per hour, fully meeting the demands of large-scale industrial production.

How Does a Continuous Fluidized Bed Dryer Operate?

A continuous shaking fluid bed dryer operates by passing a steady stream of moist powders, granules, or flakes over a perforated bed plate. Heated air is introduced from beneath the bed and flows upward through the perforations, lifting the material and suspending it in a fluid-like state. This fluidization ensures efficient contact between the hot air and the particles, enhancing the heat and mass transfer required for effective drying.

In Hywell's fluid bed system, material movement is facilitated by a specialized shaking mechanism that operates at low frequency but with high amplitude. This mechanical shaking creates a controlled, uniform flow of material through the dryer, ensuring that the first material to enter is also the first to exit (first-in, first-out). This “plug flow” behavior not only maintains consistent drying results but also provides excellent control over the residence time distribution. The well-balanced fluidization minimizes the risk of product degradation and guarantees uniform drying across the entire bed surface.

Continuous Sand Fluidized Bed Dryer Video

Continuous Fluid Bed Dryer for Salt Crystal

Continuous Fluid Bed Dryer Specifications

Model	Bed Area(㎡)	Evaporation capacity(kg/h)	Amplitude (mm)	Drive motor (kw)
SFD0.45×6	2.7	405	10-50	2.2
SFD0.45×9	4.05	607.5	10-50	4
SFD0.6×6	3.6	540	10-50	4
SFD0.6×9	5.4	810	10-50	5.5
SFD0.75×6	4.5	675	10-50	4
SFD0.75×9	6.75	1012.5	10-50	5.5
SFD0.9×6	5.4	810	10-50	5.5
SFD0.9×9	8.1	1215	10-50	7.5
SFD0.9×12	10.8	1620	10-50	11
SFD1.2×6	7.2	1200	10-50	7.5
SFD1.2×9	10.8	1620	10-50	11
SFD1.2×12	14.4	2160	10-50	15
SFD1.5×7	10.5	1600	10-50	11
SFD1.5×12	18	27700	10-50	18.5
1.Hywell machinery reserves the right to the design  without notice 2.The parameter table is for reference only， the equipment is fully customized based on the specific properties of the customer's material.

Continuous fluidized bed dryer structure

The continuous fluid bed dryer consists of several key components, including the bed structure, shaking system, airflow regulation system, and heating system. These parts work together in harmony to ensure a stable and efficient drying process.

1. Bed Structure of Large Output Continuous fluidized bed dryer

The bed structure of the continuous shaking big output fluidized bed dryer is made of high-temperature-resistant and corrosion-resistant stainless steel, ensuring excellent durability and long-term operation under harsh working conditions. This material selection also provides superior resistance to wear and chemical reactions, making it suitable for drying a wide range of materials, including those with corrosive or abrasive properties. The bed is designed with an optimized fluidized structure, allowing for even distribution of materials under the action of airflow. This prevents material accumulation and enhances drying uniformity. Additionally, the shaking motion of the bed assists in promoting consistent mixing and movement of particles, reducing the risk of dead zones and improving overall heat and mass transfer efficiency. The carefully engineered structure not only enhances energy efficiency but also supports continuous operation with minimal maintenance.

2. Shaking System of the Large Output Shaking Fluid Bed Dryer

This core system is composed of a drive motor, connecting rods, and support structures.

The motor drives the bed to shake through the connecting rods, maintaining a dynamic fluidized state of the material under airflow. This motion enhances heat distribution and improves drying efficiency.

The shaking design also helps to prevent material agglomeration, making the dryer especially suitable for powders and granular substances.

3. Airflow Regulation System of Industrial Fluidized Bed Dryer

Precisely matched fans and airflow control devices are used to ensure even distribution of hot air across the entire bed. This guarantees thorough fluidization of the product and eliminates dead zones.

The airflow is regulated through an automatic control system, allowing adjustment according to different material properties and drying requirements, which improves energy efficiency.

4. Heating System of Shaking Fluidized Bed Dryer

The fluid bed drying equipment supports multiple heating methods, including steam, electric, and gas heating, allowing flexible adaptation to different production needs.

A temperature control system ensures that materials are dried within the optimal temperature range, preventing overheating and unnecessary energy consumption.

5.Dust Collection System for Shaking Fluid Bed Dryer

The dust collection system in a shaking fluidized bed dryer plays a crucial role in maintaining clean operation, reducing environmental emissions, and recovering valuable fine particles. This system is typically composed of multiple stages to ensure effective air purification and material handling.

1). Cyclone Separator (Optional)

In some configurations, a cyclone separator is installed as a preliminary stage to capture larger particles carried by the exhaust air.

It reduces the load on the main filtration system and improves overall efficiency.

2). Bag Filter or Cartridge Filter

The primary dust collection unit is usually a high-efficiency bag filter or cartridge filter system.

It captures fine dust particles suspended in the exhaust air from the fluid bed chamber.

Pulse-jet cleaning is commonly used to maintain filter performance and extend service life.

3). Exhaust Fan and Air Ducting

An exhaust fan draws the air through the dryer and dust collection system, ensuring a stable airflow and negative pressure inside the equipment to prevent dust leakage.

The ducting is carefully designed to minimize resistance and ensure smooth airflow.

4). HEPA Filter (Optional)

For applications with strict cleanliness or air quality requirements, a HEPA filter may be added as a final filtration stage before releasing air into the environment.

This integrated dust control setup not only ensures compliance with safety and environmental standards but also helps in maintaining a cleaner working environment and reducing material loss.

5). Wet Scrubber for Exhaust Gas Treatment (Optional)

A wet scrubber, also known as a water film dust collector, is an effective exhaust gas treatment solution often used in vibrating fluid bed dryers to capture fine dust particles and control emissions. This system uses water as the scrubbing medium to remove contaminants from the exhaust stream before releasing it into the atmosphere.

Large capacity continuous fluidized bed dryer application

The continuous fluid bed dryer is ideal for drying materials that require high throughput and efficient moisture removal. It is widely used across several key industries:

1. Food Industry

Suitable for drying materials such as salt, sugars, grains, and coffee granules, ensuring uniform product quality and consistent moisture content.

For example, when drying edible salt, a single unit can achieve a capacity of 10–30 tons per hour, significantly boosting production efficiency.

2. Chemical Industry

Applied to various powdered and granular chemical materials such as sodium carbonate, sodium chloride, and ammonium sulfate.

The stable operation of the equipment ensures that the final product meets moisture specifications, preventing issues like caking or uneven drying.

3. Mineral Industry

Ideal for drying materials such as sand,Silica sand, Quartz sand, Zircon sand,Copper concentrate granules .

The dryer’s versatility, scalability, and hygienic design make it an essential solution for large-scale industrial drying applications across these sectors.

Continuous Shake Fluidised Bed Dryer Heating Methods

Depending on production requirements, the large capacity continuous fluidised bed dryer can be equipped with various heating methods to optimize energy consumption and meet the specific drying needs of different materials.

1. Steam Heating

Ideal for materials that require precise temperature control, such as food products and pharmaceuticals.

Utilizes a steam heat exchanger to provide a stable and controllable heat source, ensuring high energy efficiency and uniform temperature distribution.

2. Electric Heating

Suitable for industries that demand clean and contamination-free production environments, such as pharmaceuticals and food processing.

Offers precise temperature regulation and can be seamlessly integrated with automated control systems for intelligent temperature management.

3. Gas Heating

Well-suited for large-scale industrial operations where high heating efficiency is essential.

Offers lower operational costs and is particularly advantageous for companies requiring long-term, continuous production.

Fluidized Bed Dryer Construction Materials

Hywell Machinery can supply our SFD series vibrating fluidized bed dryers with contact parts made from a range of materials, including SS304, SS316L, titanium, and duplex stainless steel, depending on the customer’s requirements. The electrical components of the control system can also be customized to meet specific customer preferences.

Why Choose a Continuous Fluid Bed Drying Syetem for Your Drying Needs?

When it comes to industrial drying solutions, big capacity fluid bed dryers stand out as a reliable, efficient, and versatile choice. Whether you're in the chemical, food, or environmental sector, these big capacity dryers offer significant advantages that make them a smart investment for your operation.

1. Uniform and Controlled Drying

Fluid bed drying system are engineered to provide even heat distribution, ensuring consistent drying across all particles, regardless of size or shape. This minimizes the risk of product inconsistencies, such as over-drying or moisture retention, helping you maintain high-quality standards.

2. Energy-Saving Performance

Designed with efficiency in mind, energy-efficient drying systems significantly reduce energy usage compared to conventional systems. This translates to lower utility bills and a smaller carbon footprint—benefits that align with both your budget and environmental responsibilities.

3. Faster Processing, Less Downtime

Speed is critical in modern manufacturing. Fluid bed technology accelerates the drying process, increasing throughput and reducing bottlenecks. The result? Shorter lead times and better delivery performance.

4. Tailored to Your Needs

Every process is different. That’s why shake fluid bed dryers are available with a wide range of customization options—including precise temperature control, automated feeding and discharging, and adaptable airflow systems—so you can get the exact setup your application requires.

5. Durable and Low-Maintenance

Built for industrial-scale production, these machines are designed with long-term durability and ease of maintenance in mind. Minimal wear-and-tear parts and accessible designs reduce downtime and cut maintenance costs.

6. Gentle on Sensitive Materials

If your materials are sensitive to heat or mechanical stress, shaking fluid bed drying is an ideal solution. The process gently lifts and dries materials, preserving their structure, aroma, flavor, and active ingredients—perfect for food, nutraceuticals, and fine chemicals.

7. Meets Safety and Compliance Standards

Continuous fluid bed drying system are built to comply with international safety and hygiene regulations. Whether you need ATEX certification, there are solutions available to meet the most stringent industry requirements.