FANQUN Continuous Fluid Bed Dryer
FANQUN’s continuous fluid bed dryer is an industrial equipment that uses high speed hot air to pass through porous distribution plates. It makes solid particles in a fluidized state, and complete the drying process under continuous feeding and discharging conditions.We are a professional fluid bed dryer supplier.
- FANQUN continuous fluid bed dry system can produce continuously 24/7, meeting the needs of large-scale industrial production.
- The temperature in the preheating zone, drying zone, and cooling zone can be independently adjusted. Heat sensitive materials should avoid thermal damage.
- High thermal efficiency and large heat transfer area. We can customize waste heat recovery systems to significantly reduce natural gas and electricity costs.
- Used for various free flowing materials such as chemical particles, food particles, minerals, polymers, etc. The airflow and bed height of a continuous fluidized bed dryer can be adjusted.
- We provide customized services. Our professional engineering team designs tailored solutions for you based on material characteristics, production capacity requirements, and on-site conditions.
Application of Continuous Fluidized Bed Dryer
Continuous fluidized bed dryer is characterized by its high efficiency, uniformity, and continuous production capability. Fluidized bed drying system is widely used in the pharmaceutical industry, food industry, chemical industry, new energy and environmental protection industry, agricultural field, and special materials.
Continuous Fluidized BedDryer for Pharmaceutical Industry
The pharmaceutical industry is a key application area for continuous fluidized bed drying. Continuous fluidized bed drying system plays a core role in the drying of raw materials, one-step granulation, and coating. Heat sensitive APIs such as antibiotics (amoxicillin, cephalosporin), vitamin C, and enzyme preparations are dried in a low temperature continuous fluidized bed. And the activity retention rate of materials is far higher than that of spray dryer. FANQUN’s continuous fluidized bed drying system ensures uniform particle size and good flowability of your materials. It is suitable for tablet and capsule production.
Continuous Fluidized BedDryer for Food Industry
Continuous fluidized bed drying system is used for processing seasonings, dehydrated vegetables, starch, dairy products, etc. Because drying seasonings such as monosodium glutamate, chicken essence, glucose, citric acid, and salt requires consistent batch quality. FANQUN’s continuous fluidized bed dryer can minimize the difference in water activity. Dehydrated vegetables (carrot kernels, chopped onions) undergo continuous low-temperature drying in a fluidized bed, resulting in improved vitamin C retention and rehydration properties. The color and flavor remain unchanged.
Continuous Fluidized BedDryer for Chemical Industry
The chemical industry requires continuous fluidized bed dryer to be corrosion-resistant, wear-resistant, capable of continuous operation, and explosion-proof. Our FANQUN’s continuous fluidized bed equipment ensures large-scale drying and long term heavy duty operation of fertilizers (ammonium sulfate, urea, compound fertilizers). After using our factory’s continuous fluidized bed system, the energy consumption of glyphosate production was reduced by 30% and the solvent recovery rate was improved by adopting a closed-loop system. Anhydrous sodium sulfite, barium carbonate, lithium hydroxide and other inorganic salts require high drying uniformity. The multi chamber partitioned temperature control of a continuous fluidized bed deyer can ensure consistent final moisture content.
Continuous Fluidized BedDryer for Agricultural Sector
Agricultural applications focus on deep processing of grain, feed production, and initial processing of agricultural products. The drying requirements for corn germ, rice bran, and soy protein isolate are gentle and avoid protein denaturation. Fanqun’s continuous fluidized bed drying system perfectly meets this requirement, ensuring uniform fluidization and ensuring material quality. The drying of pet food and aquatic feed focuses on processing efficiency and energy consumption, and continuous equipment meets the 24/7 automated operation of production lines with an annual output of over 100000 tons. Garlic slices, ginger powder, and sliced Chinese medicinal herbs (such as astragalus and wolfberry) need to retain their functional components and color, while fluidized bed dryer rapid dehydration preserves volatile flavor compounds and polysaccharides, FANQUN’s continuous fluidized bed dryer can increase the added value of agricultural products.
Continuous Fluidized BedDryer for Special Materials
FANQUN’s continuous fluidized bed dryer can process various special materials. Probiotics, enzyme preparations, traditional Chinese medicine extract powder and other extremely heat sensitive materials (<40 ℃) are fluidized using dry air with a dew point of -40 ℃ at low temperature. At this time, a continuous fluidized bed system is usually used instead of freeze-drying. Carbon containing materials such as petroleum coke and coal slurry need to be explosion-proof and anti blocking, using self-cleaning distribution boards and anti-static filter bags. PPS、 Polyimide and other special engineering plastics require nitrogen protection to prevent oxidation during high-temperature drying (150-200 ℃).
The material relies on airflow to move forward, which is suitable for large-scale production of granular materials with good fluidity.
Equipped with a vibration motor to assist in fluidization, drying materials that are sticky, prone to clumping, or have uneven particle sizes more evenly.
Equipped with preheating zone, drying zone, and cooling zone, each with independent temperature control, suitable for heat sensitive materials.
Heating with steam radiators has low operating costs and is suitable for large-scale industrial production with boilers.
Direct heating of natural gas or liquefied gas has high thermal efficiency and fast heating, making it suitable for areas with abundant gas resources.
Closed loop operation under nitrogen protection, recyclable organic solvents, compliant with ATEX explosion-proof standards.
316L stainless steel material, mirror polished inner wall, equipped with CIP cleaning system.
Equipped with online moisture monitoring, automatic feeding and discharging, and data recording system, it can achieve unmanned production.
- Our Factory
- Technical Parameters
| Model | Fluidized Bed Area (m²) | Inlet Air Temperature (°C) | Outlet Air Temperature (°C) | Water Evaporation Capacity (kg) | Vibration Motor Model | Power (kW) |
|---|---|---|---|---|---|---|
| ZLG3×0.30 | 0.9 | 70-140 | 40-70 | 20-35 | ZDS31-6 | 0.8×2 |
| ZLG4.5×0.30 | 1.35 | 70-140 | 40-70 | 35-50 | ZDS31-6 | 0.8×2 |
| ZLG4.5×0.45 | 2.025 | 70-140 | 40-70 | 50-70 | ZDS32-6 | 1.1×2 |
| ZLG4.5×0.60 | 2.7 | 70-140 | 40-70 | 70-90 | ZDS32-6 | 1.1×2 |
| ZLG6×0.45 | 2.7 | 70-140 | 40-70 | 80-100 | ZDS41-6 | 1.5×2 |
| ZLG6×0.60 | 3.6 | 70-140 | 40-70 | 100-130 | ZDS41-6 | 1.5×2 |
| ZLG6×0.75 | 4.5 | 70-140 | 40-70 | 120-140 | ZDS42-6 | 2.2×2 |
| ZLG6×0.9 | 5.4 | 70-140 | 40-70 | 140-170 | ZDS42-6 | 2.2×2 |
| ZLG7.5×0.60 | 4.5 | 70-140 | 40-70 | 130-150 | ZDS42-6 | 2.2×2 |
| ZLG7.5×0.75 | 5.625 | 70-140 | 40-70 | 150-180 | ZDS51-6 | 3.0×2 |
| ZLG7.5×0.9 | 6.75 | 70-140 | 40-70 | 160-210 | ZDS51-6 | 3.0×2 |
| ZLG7.5×1.2 | 9 | 70-140 | 40-70 | 200-260 | ZDS51-6 | 3.0×2 |
Note: The above evaporation capacity refers to the maximum evaporation capacity.
Working Principle for Continuous Fluid Bed Dryer
The working principle of a continuous fluidized bed dryer is to use hot air to maintain the “boiling” state of materials in continuous flow. FANQUN’s fluid bed dryer continuous type can achieve efficient and uniform continuous drying.
The workflow in operation is as follows:
Step 1:Continuous feeding and discharging
The material is continuously fed into the dryer through a quantitative feeder (such as a screw feeder). In a horizontal long bed, the material advance speed is controlled by adjusting the height or vibration frequency of the overflow weir. The dried product is also continuously discharged from the other end, forming a stable dynamic equilibrium.
Step 2: Hot air lifting forms a fluidized bed layer
Hot air is blown upward through a specially designed gas distribution plate. When the airflow velocity is moderate, the material particles are lifted and suspended. It exhibits a rolling state similar to a liquid. This is known as “fluidization.” At this stage, the gas solid two phase mixture is extremely well combined. This is the foundation of efficient heat transfer.
Step 3: Partition control of precise craftsmanship
The core technological advantage of continuous fluidized bed drying system is the zoning control of materials. The horizontal bed is divided into multiple independent areas by partitions. The air volume, temperature, and humidity in each area can be adjusted separately. For example, the front area is high-temperature dry and the back area is low-temperature cooled. One device can simultaneously complete drying and cooling without the need for handling.
Step 4: Efficient mass transfer to complete water evaporation
In a fluidized state, hot air comes into full contact with the material. The high-temperature airflow rapidly vaporizes the surface moisture of the material and carries it out of the equipment. By adjusting the residence time and temperature of each zone, the final moisture content of the product can be precisely controlled. This drying process ensures that the drying effect of each particle of your material is highly consistent.
Core Components of A Continuous Fluidized Bed Dryer
The continuous fluidized bed dryer can achieve 24/7 uninterrupted operation thanks to the cooperation of several core systems.
Inlet air handling system
The inlet system of the continuous drying equipment is responsible for providing clean and temperature controlled hot air. This is the first step to ensure drying quality and compliance with GMP standards. The air first passes through a primary filter to intercept large particles of dust, and then through a medium efficiency filter to remove fine particles. For the pharmaceutical and food industries, our factory will also be equipped with H13 grade HEPA high-efficiency filters, with a filtration efficiency of over 99.99%. Our intake air handling system ensures that the air entering the equipment is clean and sterile. The filtered air is heated to the set temperature by a heater (the heating method of continuous fluidized bed dryer can be selected according to energy conditions, such as steam radiator, electric heater, gas or thermal oil furnace). The heated hot air is sent to the host by a variable frequency fan, and the air volume can be precisely adjusted.
Airflow distribution system
The distribution system of the continuous fluidized bed dryer is located at the bottom of the bed.And it is covered with carefully designed holes. The function of the distribution board is twofold: firstly, to evenly distribute the hot air, ensuring that the materials in the entire bed can “boil”; The second is to hold the materials and prevent leakage.
The distribution board of FANQUN’s continuous fluidized bed dryer has sufficient rigidity to withstand the continuous vibration during the drying process.
Fluidized bed drying chamber
The drying chamber is the heart of the fluidized bed, where materials are dried or cooled. Material containers are usually made of 316L stainless steel material. Its inner wall is mirror polished to Ra ≤ 0.4 μ m, with no blind spots design. These meet the hygiene requirements of the pharmaceutical and food industries.The upper part of the fluidization chamber will be appropriately enlarged in cross-section. The purpose of this is to reduce wind speed, allowing fine powder to settle and minimize losses carried away by the airflow. The observation door is equipped with illuminated mirrors, allowing operators to check the status of internal materials at any time.
Heating system
The heating system is responsible for heating the filtered clean air to the temperature required by the process. Based on the energy conditions and material characteristics of the factory, we offer multiple heating methods: steam radiators are suitable for large-scale production with boilers and have low operating costs. Electric heaters have fast response speed and precise temperature control, making them suitable for small and medium-sized production capacity or occasions with strict temperature control requirements. Gas/oil hot blast stoves have high thermal efficiency and are suitable for areas with abundant natural gas resources. The thermal oil furnace can provide a stable high-temperature heat source (up to 250 ℃ or above). All heaters are equipped with multi-point temperature sensors and multi-level safety protection, which are linked with the PLC control system to ensure that temperature fluctuations are controlled within ± 2 ℃. For the pharmaceutical and food industries, the heating section and filter are integrated into the pry module to avoid secondary pollution. We can also design a waste heat recovery system for continuous fluidized bed dryer system. Utilizing exhaust heat to preheat the intake air can further reduce energy consumption by 15% -25%.
Fan and air handling system
The fan and air handling system of continuous fluidized bed dryer are the power core. It is responsible for providing the airflow power required for material fluidization and accurately controlling the wind speed and bed pressure difference. The system consists of a blower and a induced draft fan: the blower sends heated clean air into the main unit to ensure sufficient fluidization of materials. The induced draft fan maintains a slight negative pressure in the system, expelling humid air to prevent dust from escaping. Both fans are equipped with a variable frequency control system (VFD), which can adjust the air volume in real time according to process requirements and accurately match the minimum fluidization air volume requirements. This not only ensures the fluidization effect, but also avoids the loss of flying materials caused by excessive air volume. Variable frequency control can significantly reduce energy consumption, saving 20%-30% compared to traditional fixed frequency fans. The selection of fans is professionally calculated, taking into account material characteristics, bed resistance, and system pressure loss to ensure long-term stable and reliable operation. The entire system prevents dust leakage and ensures a clean and safe operating environment.
Dust collection system
The dust collection system of a continuous fluidized bed dryer is responsible for recovering fine powder carried by the airflow and ensuring emissions meet standards. The top of the equipment is equipped with a pulse bag filter, which uses anti-static filter material. Regularly use compressed air to blow back and clean the accumulated powder, ensuring a stable filtering area. For high-value products, a cyclone separator can be installed to recover large particles and fine powder in advance. The dust removal system operates under slight negative pressure to prevent dust leakage. The pharmaceutical and food industry can choose HEPA high-efficiency filters to meet GMP cleanliness requirements. The entire system achieves the dual goals of product recycling and environmental emissions, avoiding material waste. The dust removal system allows you to easily pass environmental inspections.
Discharge system
The discharge system of the continuous fluidized bed drying system is responsible for continuously discharging the dried material. The discharge system simultaneously maintains the balance of bed material levels to ensure stable operation of the equipment. Common forms include vibrating conveyors, star shaped discharge valves, and cooling conveyors: vibrating conveyors are suitable for granular materials and are smooth and uniform. The star shaped discharge valve has good sealing to prevent air leakage. The cooling conveyor can cool down while discharging, making it easy to package directly. The discharge speed directly determines the residence time of materials in the bed – too fast speed leads to insufficient drying, while too slow speed affects production capacity. The discharge system design of the continuous fluidized bed drying system focuses on preventing blockages, using large openings, anti adhesion coatings, or vibration assistance to ensure smooth material flow and continuous production without stopping.
Control system
The control system of the continuous fluidized bed drying equipment monitors and automatically adjusts key parameters such as temperature, air volume, and feed rate in real time. It can ensure the stable operation of the equipment. Adopting PID closed-loop control to regulate the inlet air temperature and bed pressure difference, with fluctuations controlled within ± 1 ℃. The system is equipped with multiple alarm protections such as over temperature and abnormal pressure difference, and all data can be traced. The operator can set the process recipe with one click through the touch screen, and the equipment can automatically execute it. The control system of the continuous fluidized bed dryer achieves true unmanned continuous production.
Customize optional components as needed
In addition to the standard configuration, our engineers can also integrate multiple optional systems according to your specific needs. The cooling zone can be cooled directly after drying, eliminating the need for independent cooling equipment. The hot air circulation system recovers exhaust waste heat, saving energy by more than 20%. The explosion-proof system and inert gas protection system comply with ATEX standards to ensure the safe production of solvent materials. The CIP online cleaning system meets the requirements of the pharmaceutical and food industry and can be thoroughly cleaned without disassembly. Whether you are dealing with thermosensitive materials, solvent containing materials, or materials with high cleanliness requirements, we can tailor the most suitable continuous fluidized bed drying system for you.
Continuous Fluidized Bed Dryer VS Ordinary Fluidized Bed Dryer
The main differences between ordinary fluidized bed dryers (intermittent) and continuous fluidized bed dryers are reflected in three aspects: operation mode, processing capacity, and product quality.
Different operating modes
Ordinary fluidized bed dryer adopts batch operation: the next batch of production can only be carried out after a batch of materials is put in, dried, and discharged. There is a time interval between each batch..
Continuous fluidized bed dryer achieves uninterrupted operation: materials continuously enter from the feed end and are discharged continuously from the discharge end after drying. The device can operate at full capacity 24/7.
Different product quality controls
There may be slight quality fluctuations between different batches of ordinary fluidized bed dryers. We need to strictly control the process parameters of each batch.
After the continuous fluidized bed dryer enters steady-state operation, all materials undergo identical drying conditions, resulting in highly consistent product quality. The horizontal multi chamber design of a continuous fluidized bed dryer divides the bed into multiple independent temperature control zones to ensure uniform moisture content for each particle of the material.
Different processing abilities
The processing capacity of ordinary fluidized bed drying system is limited by the volume of a single batch, ranging from tens of kilograms to hundreds of kilograms. It is suitable for research and development, pilot testing, and small-scale production of multiple varieties.
The continuous fluidized bed dryer processing capacity can reach several hundred kilograms to tens of tons per hour.The continuous fluidized bed drying system is designed specifically for large-scale industrial production.
Fanqun is a professional supplier of fluid bed dryers. Over the past 30 years, we have continuously improved our technology, working closely with leading domestic universities to develop and deliver more efficient, energy‑saving equipment to customers around the world.If you have any questions about continuous fluid bed dryers, please feel free to contact our team. We are available online 24/7 and ready to help you.
Continuous 24/7 uninterrupted operation, with continuous material input and output, suitable for large-scale industrial production.
Okay. By adjusting the height of the overflow weir (140-250mm), the residence time is precisely controlled from a few minutes to several hours to ensure consistent final moisture content.
The thermal efficiency is 60% -80%, which is 20% -40% more energy-efficient than traditional drying. FANQUN’s continuous fluid bed drying system can be equipped with a waste heat recovery system to preheat the intake air using exhaust waste heat.
The FANQUN’s continuous fluid bed dryer can be achieved at a rate of several hundred kilograms to over 100 tons per hour. This meets your annual production requirement of tens of thousands of tons.
The maintenance of the continuous fluidized bed drying system is very simple. You only need to clean the filter and check the sealing ring on a daily basis. However, for abrasive materials, you need to check the distribution board more frequently.
You can send us samples. Our factory provides free testing of materials. After the testing is completed, our professional engineering team will provide you with a process parameter and capacity evaluation report, providing a basis for selection.
