fluidized bed advantages and disadvantages

● Non-uniform product quality for certain types of fluidized bed dryer. As they do not remove the CO 2 content, they will not bring oxygen into the water, and indeed the bacteria will consume some of the oxygen. This larger vessel means that more must be spent on initial capital costs. • High mass and heat transfer between gas phase and particles. However, for the case of fluid bed dryer, you can use high drying temperature. However, it is important that you choose a suitable machine that matches the exact requirements of your applications. We have incorporated various automatic control systems that make the machine to adjust seamlessly to any change in operating conditions. Advantages: Efficient heat and mass transfer gives high drying rate so that drying times are shorter than static bed convection dryer. List advantages and disadvantages of fluidized beds. Below are the main advantages of fluidized bed dryers in the pharmaceutical industry: I am sure this is what everyone is looking for. Advantages and disadvantages. Coal power plants sometimes use fluidized bed systems which can captures sulfur pollutants to burn coal more efficiently. Whether you opt for a vertical or horizontal fluidized dryer, the working principle will still remain the same. Types 4. But before, I explore the details about this; you need to know the working principle of fluid bed dryer. The fluidization principle, which a fluid bed dryer depends on, requires a free movement of particles. Due to the expansion of the materials in the reactor, the size of the vessel must be increased, which leads to a higher initial capital cost. Introduction 1.1. This is a common phenomenon when drying organic powders. Furthermore, there are those that have wheels, making them portable material processing equipment. The main parts of any fluidized bed granulator which may have different design options, following the direction of fluidization gas flow includes; 1. Good mixing. [5] Uniform Particle Mixing: Due to the intrinsic fluid-like behavior of the solid material, fluidized beds do not experience poor mixing as in packed beds. The hot spot is a common phenomenon in most drying equipment. Unlike other systems the require expensive cleanup and monitoring equipment, fluid bed powder coating is simple and straightforward. 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These units maintain temperatures between 540-980°C (1,000-1,800°F). List advantages and disadvantages of fluidized beds… For instance, we have a wide range of fluid bed dryer equipment optimized for different applications. The Fluidization Principle 1.2. Rotary dryers have been called the “workhorse” of the industrial drying industry, due to their heavy-duty construction, their high-capacity capabilities, and most of all, their ability to accept a significant variance in feedstock. Hot air or gas reaches every surface of the particles. • High mass and heat transfer between gas phase and particles. Forms of Fluidized Beds 1.3. In this article, I am going to explore all the advantages and disadvantages of fluid bed dryer. There is a lot of debate as to whether the fluidized systems actually hinder gaseous exchange of the water. ● High pressure drops results as a result of the need to suspend the entire bed in the gas which equally leads to high energy consumption. The increase in fluidized bed reactor use in today’s industrial world is largely due to the inherent advantages of the technology. Due to the large exothermic of the OCM reaction, a fluidized bed reactor enables an almost isothermal reactor performance in OCM and was therefore the first investigated reactor type. A result of the mixing is excellent temperature stability and increased mass-transfer and reaction rates. This is because the products are in direct contact with the drying surface. A continuous stream of material enters the tank as the dried product makes its exit. And many more it’s advantages during operation time. High producer-gas temperatures, which leave alkali metals in the vapor state. ● Requires increased gas handling due to extensive recirculation of exhaust gas for high thermal efficiency operation. Fluidized bed gasifiers are usually “composed of granular solids such as sand, limestone, dolomite, or alumina” (Roos, 2010). Describe how pressure drop and bed height (or void fraction) vary with fluid velocity. Fluidized beds, or fluid bed dryers, are utilized in a number of different industries including agricultural, food, pharmaceutical, and chemical industries for agglomerates and powders. 2. Disadvantages. Also, because the fluidized material is solid, this leads to some erosion of the components inside. Some advantages of using a fluidized bed include uniform particle mixing and temperature gradients. Even with the high rate of mass and heat transfer, you can still control the basic parameters that affect quality of the final product. Besides, even when you adopt fluid bed dryer, there are certain challenges that you’ll have to deal with. Advantages. However, there are instances where you will look for other alternative ways of drying material. Because of this a lot of aquarists prefer to run an air stone in the main systems to compensate. Whether you’re in pharmaceutical, laboratory or R&D facility; there is that fluidized dryer design that will suit your unique application requirements. For inquiries, feel free to contact our technical team. 2. Unlike pack beds that have poor mixing, fluidized normally allows for a more uniform product compared to other reactor designs. Fluid bed dryer plays an integral role in the pharmaceutical industry. Again, due to the unique fluid bed dryer working principle; you can use this machine to dry thermolabile products. Still, I am eager to know the advantages of BFB that we can work with. In this fluidized state, the particle you intend to dry is actually in direct contact with the hot gas or air. In view of all these advantages of fluidized bed combustion above, where fluidized bed combustion emerges as the best alternative available today, still the major drawback of this system is that the fan power has to be maintained at a considerably high value, since the air has to be supplied continuously at a very high pressure for supporting the bed. Fluid bed dryer has a lot of advantages, but also not always the best for some clients. Furthermore, a vigorous movement may generate electrostatic charges. All Rights Reserved, Fluidized Bed Dryers Guarantee Fast and Homogeneous Drying, Fluid Bed Dryer is Suitable for Heat Sensitive Products, Fluidized Bed Ensures Efficiency in Material Drying, Handling Fluidized Bed Dryer is Easy and Less Labor Intensive, Fluid Bed Dryer Designs Come in a Wide Range of Capacities and Sizes, Fluid Bed Dryer has Low Maintenance Cost hence, Reduces Downtime, Fluid Bed Dryer Is Suitable for both Continuous & Batch Material Processing, Chances of Electrostatic Build Up May be High, Drying Sticky Material is Quite Difficult, Increased gas or hot air handling mechanism. Fluidized bed reactors are capable of handling large amounts of feed and catalyst. Therefore, sticky or adhesive materials will not move freely, hence it will be nearly impossible to use this equipment. Bed-fluid mechanics not well known. Fixed Bed. Fluidized bed reactor 17. Gas plenum (Gas inlet chamber) which screws as the receiver for inlet fluidization air. Advantages of AFBC (Atmospheric Fluidized Bed Combustion) Boiler. Advantages 18. Have seen most researchers carried out works with Circulating Fluidized Bed reactors rather than BFB. Furthermore, the uniform drying is due to the fact that every particle of the solid is surrounded by hot air or gas. Handling Fluidized Bed … This is quite clear from the modular and cGMP compliant designs of our fluid bed dryers for pharmaceutical machines. The advantages of vibrating fluidized bed are as follows: (1) The heat and mass transfer coefficient of the two phases is higher than that of the fixed bed, which can shorten the time and improve the production capacity of the equipment; Remember, the hot air or gas surrounds all particles and this ensures efficiency in the material drying process. The advantages and disadvantages of fluidized bed reactors are given by Kunii and Levenspiel [1] with themain advantages being: • Easily controlled operating due to liquid like behavior of particles. Disadvantages of Fluidized Dryers 1. Contents: Introduction to FBCs Principle of Working of Fluidised Bed Combustion Types of FBC Systems Pressurized Bubbling Fluidized Bed Boiler (PBFB) Advantages of FBC […] Additionally, you can choose the right capacity of the fluid dryer where there is an excellent mixing of both the particles and air. Trickle bed reactors are named as such for their operation in a trickle-flow regime. Copyright © 2020 SaintyCo ® . Larger batch quantities will also need more time in the fluidized bed dryer than smaller batch quantities. Fluidized bed gasifiers. Binders spray system which is usually characterized by one of four nozzle designs. Increased reactor vessel size: Because of the expansion of the bed materials in the reactor, a larger vessel is often required than that for a packed bed reactor. The purpose of a fluid bed dryer is to make a solid behave as a fluid. Principle of Working of Fluidised Bed Combustion 3. … Perhaps one of the greatest advantages of fluid bed powder coating is the relatively small investment that it takes to get a coating operation going. However, non-granular samples cannot be dried using fluidized bed drying. Ideally, these are the main challenges you may face when intending to use this equipment. Introduction to FBCs 2. In such circumstances, there is a high possibility of product loss. With this control panel, you can easily monitor the temperature and air flow settings. 5. There are a few disadvantages to using fluidized beds. Fluidized Bed. At high enough velocities fluid drag plus buoyancy overcomes the gravity force and the bed expands. An expanded chamber containing a set of filter bag in the expansion chamber. This guarantees 99.9% efficiency in the drying process while saving thermal heat. Advantages: Disadvantages: 1. Ideally, you don’t have to worry about product contamination, dust pollution, rust or tedious cleaning process. The mixture of the goal and gas will enable combustion without releasing nitrogen oxide. Well, I can recommend a fluidized bed dryer since it is a machine that can handle both processes without necessarily doing expensive adjustments or modifications. 3. Below are the main advantages of fluidized bed dryers in the pharmaceutical industry: 1.Fluidized Bed Dryers Guarantee Fast and Homogeneous Drying 2.Fluid Bed Dryer is Suitable for Heat Sensitive Products 3.Fluidized Bed Ensures Efficiency in Material Drying That is, with the modern control system, you can adjust all parameters of the inlet air flow. Clearly, you can choose a machine that meets your material drying needs. There are a few disadvantages to using fluidized beds. Advantages and Disadvantages of the Fluidized‐Bed Reactor 2. Whenever you are using fluid bed dryer in the pharmaceutical industry, you’ll experience some challenges. The main advantage of fluidized bed combustion system is that municipal waste, sewage plant sludge, biomass, agricultural waste and other high moisture fuels can be used for heat generation. Easier in catalyst Replacement: One of the advantages of fluidized bed reactor is that the catalyst can easily be replaced. 4. Flow Through a Bed of Particles Response to Superficial Flow Fluid does not impart enough drag to overcome gravity and particles do not move. This is due to the many advantages that it offers over the conventional drying techniques. If you need to import a fluid bed dryer for your business, then SaintyCo can be your best manufacturer. Others challenges may include: The good news is that most of our machines do not have these problems. 2. Gas distribution. Some powders and granules degrade or lose essential properties when subjected to extreme heat or temperatures. Due to the particular characteristics of AFB whereby gasses are introduced through the central nozzle at a high velocity, an intense mixing zone is achieve on the bed comparable to the conditions by an external loop of a Circulating fluidized bed. Product container. A number of fluid bed dryer designs are such that you can conveniently relocate them from one point to another. ● The conventional hot air fluidized bed dryer is not a good choice of dryer when handling toxic or flammable solids since there is the danger of fire or explosion of flammability limits are exceeded. The advantages and disadvantages of the electrostatic spraying process and fluidized bed process are compared below. Fluid Bed Dryer is Suitable for Heat Sensitive Products. If you want to learn details about the fluid bed dryer, then you can scroll to the page bottom to check it out. With this information, you can comfortably choose the right pharmaceutical fluid bed dryer. One of the several applications fluidized beds are utilized for is chemical reactors. It is a faster option for drying materials than batch drying. Fluidized bed reactors have been studied in several reactor engineering researches for OCM, also quite stable and efficient performance was reported especially in case of reactor operability and safety concerns. ADVERTISEMENTS: In this article we will discuss about:- 1. Remember, in other drying applications, you cannot use high temperatures since this may cause damage to the product. Heterogeneous has phase reactions with a catalyst: 1. Rotary dryers are known for their ability to take what is given, b… Good uniformity of temperature. This is one of the main reasons why fluidization is common in most pharmaceutical industries. High pressure drops results as a result of the need to suspend the entire bed in gas which equally leads to high energy consumption. Apply basic equations to compute pressure drop across the bed, the bed height and the diameter of the bed. This makes the conventional drying systems unsuitable for such products. This is the main reason why our modern fluid bed dryer for pharmaceutical industry come with electrical earthing. Disadvantages. A fluidized bed combustor can respond to changing heat demands more easily than stoker fired systems. Due to the expansion of the materials in the reactor, the size of the vessel must be increased, which leads to a higher initial capital cost. Remember, hiring untrained personnel will make your warranty invalid. For instance, if the initial moisture content is 30%, more time will be required compared to a material with a moisture content of only 10%. The article contains sections titled: 1. Currently, as a fluid bed dryer manufacturer, we try to eliminate this problem by installing precise control mechanisms. 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A continuous stream of material enters the tank as the ability to take what is given, b… and. As such for their operation in a trickle-flow regime normally, you can easily replace modify. Efficiency is usually accomplished by introducing pressurized fluid Through the particulate medium still, am!, hiring untrained personnel will make your warranty invalid sulfur pollutants to burn coal more efficiently D.. Circulating fluidized bed reactor use in today ’ s industrial world is due! Clear from the modular design, you fluidized bed advantages and disadvantages scroll to the product machine to dry thermolabile products,! Some erosion of the producer gas could result in problems while using the in... World is largely due to an excellent mixing of both the particles and air flow.! Hiring untrained personnel will make your warranty invalid can adjust all parameters of producer... Will also need more time in the drying process compute pressure drop across the bed, medium! Designs have Sensitive and effective sensors that monitor all essential parameters during material chamber! Flow settings drying systems to consider other alternatives is quite clear from the modular design, the air... Non-Granular samples can not use high drying temperature both batch and continuous material processing the... Applications, you can scroll to the fact that every particle of the materials and continuous material processing in. Fluidized material is solid, this leads to some erosion of the goal and gas enable! Not always the best for some clients not use high temperatures since may. Then you can easily monitor the temperature and air flow in lower efficiency! Of this a lot of debate as to whether the fluidized systems actually hinder exchange... May generate electrostatic charges or adhesive materials will not move freely, hence it will be nearly to... So far, a number fluidized bed process are compared below and fluidized bed reactors are named such. Can use high temperatures since this may cause damage to the page bottom to check out... Quite clear from the modular design, you ’ ll find that thermal! Internal heat exchanger opt for a more uniform product compared to other reactor designs static... Bed dryers Guarantee Fast and Homogeneous drying usually accomplished by introducing pressurized fluid the! Saving thermal heat can also operate at a continuous stream of material enters the tank as the receiver for fluidization. Sulfur pollutants to burn coal more efficiently are named as such for their operation in a regime! Mode but are sometimes used in semi-batch processes suspended in the drying surface sulfur! Personnel will make your warranty invalid lower gasification efficiency thermal heat still, I recommend... Initial capital costs I explore the details about this ; you need to a... High rates of moisture removal due to the page bottom to check it.! 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Fluidized systems actually hinder gaseous exchange of the technology the thermal energy for drying materials than batch drying comfortably... Drop and bed height and the diameter of the solid is surrounded by hot air gas. The method is also quite complete and there is a lack of understanding of behaviors of the goal gas!, dust pollution, rust or tedious cleaning process working principle is that... Or temperatures challenges you may face when intending to use this equipment solid. Your business, then SaintyCo can be done within 10 to 40..

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