A pilot plant is a small-scale industrial plant in which problems can be identified and solved before the corresponding full-scale facility is built. In terms of thermal processing, such a testing ground is a basic laboratory that uses stock process equipment to provide valuable data for the design of a larger version, so that any anomalies in the process can be worked out before the full-scale plant is constructed. Scientific data about reactions, material properties and even corrosiveness may be gathered, and it helps to predict the behavior of a process. Plant designers use data from the pilot facility to refine their design of the production scale facility. When bulk materials must be dried as a part of the process, a fluid bed dryer is often a key component.
Pilo Plant Testing Lab
Some materials have characteristics that make them difficult to handle in a fluid bed dryerdryerscoolers.aspx, but can be successfully dried as long as care is taken in the design and operation of the dryer itself. This is best done through testing, and is where a pilot plant dryer comes into play. The results can yield significant insights for the design of a dryer, and helps prevent the need for costly equipment modifications after the dryer is already fabricated and installed.
There are three main types of difficult materials that a fluid bed dryer can process, and that pilot plant testing can help with:
• Material with a wide particle size distribution
• Material containing very fine low-density particles
Because a fluidized bed dryer is sized based on the air velocity required to fluidize the largest particle, a material with a wide particle size distribution can require a velocity higher than the terminal velocity of its smallest particles. This will cause the smallest particles to become entrained in the exhaust airflow.
A dryer with a wider freeboard section will de-entrain the small particles in some cases and allow them to discharge with the larger particles. However, it is not always practical to enlarge the freeboard section enough to de-entrain the particles. In this case, the small particles will be entrained and exhausted with the airflow to the emissions control equipment. This equipment, including cyclones, baghouses and their components, such as rotary airlock valves and screw conveyors, must be designed to properly handle this loading. To prevent loss, the material recovered by the emissions control equipment is typically transferred by a conveyor so it can be combined with the dried material.
Emissions control equipment can also be used as separation equipment to remove fine particles from the discharged dried material, such as when the final product must have a narrow particle size distribution. In this case, the emissions control equipment eliminates the need for a screener, and the small particles are not combined with the dried material. Again, the emissions control equipment and its components must be designed to handle this loading.
Very fine, lightweight materials are likely to be entrained in a fluid bed's exhaust airflow, so they are most often dried in a flash dryer, where their characteristics make them ideally suited to the flash dryer's pneumatic conveying operation. However, the required feed and discharge moisture contents of fine, lightweight material may eliminate flash drying as an option because the particles contact the dryer's hot conveying air for only a few seconds, which may not be enough to dry them. A media fluid bed dryer can be a good option in this instance.
In the media fluid bed, the fluidized bed is established with a dry bulk media, such as limestone or glass beads, which can be fluidized and is compatible with the material to be dried. Then as the wet feed enters the dryer and drops into this fluidized media, the media helps break up the feed for better heat and mass transfer. As the material dries, it is entrained in the airflow, exhausted with the air and recovered by the emissions control equipment. In this type of fluid bed, all the material is entrained in the airflow, and none of it exits via the dryer's discharge outlet.
An extremely wet or sticky material can adhere to surfaces inside the dryer, or form encapsulated clumps that fall to the bottom of the fluidized bed. Solving this problem typically requires adding a recycle system to the dryer to separate a portion of the dried material to be discharged, transfer it back to the inlet end of the dryer and mix it with the incoming wet feed before the feed enters the inlet. This reduces the feed's overall moisture content or stickiness, so it can be easier to handle and dry in the fluid bed dryer.
Heyl & Patterson516 heyl patterson.htm manufactures fluid bed dryers that are among the most efficient and cost-effective dryers on the market. Conventional designs are available for powders and granular materials, and unique models can be designed to dry sludges, filter cakes, agglomerates and other materials exhibiting characteristics not normally conducive to fluid bed processing. Factors such as particle size distribution and weight, starting and final moisture content, product temperature, drying air temperature, air velocity and retention time of the material are all considered in the dryer specifications.
Applications and designs can be evaluated at Heyl & Pattersonsearch?client=safari&rls=en&q=Heyl+%26+Patterson+site:bulk online.com's pilot plant testing lab facility. Working directly with a sample of the material to be dried, Heyl & Pattersonsearch?q=heyl" can perform the necessary testing to determine the appropriate processing conditions that will achieve the desired results. Technicians test the available features and options to find the optimal configuration and specifications for the equipment. The end result is the most effective and efficient equipment for any process, and clients gain peace of mind that they are installling the right equipment for the job, with no surprises.
Heyl & Patterson: Pilot Plant Testing Leads to Better Results
Heyl & Patterson:
Pilot Plant Testing Leads to Better Results from a Fluid Bed Dryer
by David Phillips7310 david phillips.html
Heyl & Patterson, USA
A pilot plant is a small-scale industrial plant in which problems can be identified and solved before the corresponding full-scale facility is built. In terms of thermal processing, such a testing ground is a basic laboratory that uses stock process equipment to provide valuable data for the design of a larger version, so that any anomalies in the process can be worked out before the full-scale plant is constructed. Scientific data about reactions, material properties and even corrosiveness may be gathered, and it helps to predict the behavior of a process. Plant designers use data from the pilot facility to refine their design of the production scale facility. When bulk materials must be dried as a part of the process, a fluid bed dryer is often a key component.
Pilo Plant Testing Lab
Some materials have characteristics that make them difficult to handle in a fluid bed dryerdryerscoolers.aspx, but can be successfully dried as long as care is taken in the design and operation of the dryer itself. This is best done through testing, and is where a pilot plant dryer comes into play. The results can yield significant insights for the design of a dryer, and helps prevent the need for costly equipment modifications after the dryer is already fabricated and installed.
There are three main types of difficult materials that a fluid bed dryer can process, and that pilot plant testing can help with:
• Material with a wide particle size distribution
• Material containing very fine low-density particles
• Material that is extremely wet or sticky
For a better understanding into the basic operation of fluidized bed dryers, read How a Fluid Bed Dryer Operatesshowthread.php?27905 How a Fluid Bed Dryer Operates.
Because a fluidized bed dryer is sized based on the air velocity required to fluidize the largest particle, a material with a wide particle size distribution can require a velocity higher than the terminal velocity of its smallest particles. This will cause the smallest particles to become entrained in the exhaust airflow.
A dryer with a wider freeboard section will de-entrain the small particles in some cases and allow them to discharge with the larger particles. However, it is not always practical to enlarge the freeboard section enough to de-entrain the particles. In this case, the small particles will be entrained and exhausted with the airflow to the emissions control equipment. This equipment, including cyclones, baghouses and their components, such as rotary airlock valves and screw conveyors, must be designed to properly handle this loading. To prevent loss, the material recovered by the emissions control equipment is typically transferred by a conveyor so it can be combined with the dried material.
Emissions control equipment can also be used as separation equipment to remove fine particles from the discharged dried material, such as when the final product must have a narrow particle size distribution. In this case, the emissions control equipment eliminates the need for a screener, and the small particles are not combined with the dried material. Again, the emissions control equipment and its components must be designed to handle this loading.
Heyl & Patterson Fluid Bed Dryershowthread.php?28277 Heyl amp Patterson Fluid Bed Dryer Fundamentals for Sand
Very fine, lightweight materials are likely to be entrained in a fluid bed's exhaust airflow, so they are most often dried in a flash dryer, where their characteristics make them ideally suited to the flash dryer's pneumatic conveying operation. However, the required feed and discharge moisture contents of fine, lightweight material may eliminate flash drying as an option because the particles contact the dryer's hot conveying air for only a few seconds, which may not be enough to dry them. A media fluid bed dryer can be a good option in this instance.
In the media fluid bed, the fluidized bed is established with a dry bulk media, such as limestone or glass beads, which can be fluidized and is compatible with the material to be dried. Then as the wet feed enters the dryer and drops into this fluidized media, the media helps break up the feed for better heat and mass transfer. As the material dries, it is entrained in the airflow, exhausted with the air and recovered by the emissions control equipment. In this type of fluid bed, all the material is entrained in the airflow, and none of it exits via the dryer's discharge outlet.
An extremely wet or sticky material can adhere to surfaces inside the dryer, or form encapsulated clumps that fall to the bottom of the fluidized bed. Solving this problem typically requires adding a recycle system to the dryer to separate a portion of the dried material to be discharged, transfer it back to the inlet end of the dryer and mix it with the incoming wet feed before the feed enters the inlet. This reduces the feed's overall moisture content or stickiness, so it can be easier to handle and dry in the fluid bed dryer.
Heyl & Patterson516 heyl patterson.htm manufactures fluid bed dryers that are among the most efficient and cost-effective dryers on the market. Conventional designs are available for powders and granular materials, and unique models can be designed to dry sludges, filter cakes, agglomerates and other materials exhibiting characteristics not normally conducive to fluid bed processing. Factors such as particle size distribution and weight, starting and final moisture content, product temperature, drying air temperature, air velocity and retention time of the material are all considered in the dryer specifications.
Applications and designs can be evaluated at Heyl & Pattersonsearch?client=safari&rls=en&q=Heyl+%26+Patterson+site:bulk online.com's pilot plant testing lab facility. Working directly with a sample of the material to be dried, Heyl & Pattersonsearch?q=heyl" can perform the necessary testing to determine the appropriate processing conditions that will achieve the desired results. Technicians test the available features and options to find the optimal configuration and specifications for the equipment. The end result is the most effective and efficient equipment for any process, and clients gain peace of mind that they are installling the right equipment for the job, with no surprises.
For more information about Heyl & Pattersonsearch?q=Heyl+%26+Patterson+site:bulk online.com&client=safari&rls=en&source=lnms&tbm=isch's pilot plant testing lab facility and its available equipment, contact us or click here.
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