desiccant air dryer for compressed air | quincy compressor

desiccant air dryer for compressed air | quincy compressor

In heavy-duty industrial operations, water vapor in compressed air equipment can lead to premature failure, corrosion, frozen air lines, quality control issues and a range of other operational problems. A desiccant air dryer system purifies compressed air by absorbing moisture. You can find these systems in any industrial application in which reliable equipment and exceptional quality control is necessary.

Quincy Compressor manufactures a full line of desiccant air dryer systems. Our products provide air purification from -40F PDP down to -100F PDP. These dryers are built and designed to provide the smallest footprint possible while ensuring maximum performance. Quincy desiccant dryers have ASME and CRN designed pressure vessels standard. Also, standard with the desiccant dryers is a 2-year package warranty and a 5-year valve warranty.

Quincy QHD heatless desiccant dryers use a small portion of dried, compressed air to purge and regenerate the off-line tower. The QHD has been engineered to ensure optimal performance and efficiency in a range of different applications while keeping downtime to a minimum.

The QHD series of desiccant dryer systems includes 13 models that deliver between 230 and 3,400 CFM of clean, dry air at a pressure of 100 psig. All feature a heavy-duty steel base and dual tower configuration that regenerates automatically.

Under normal operation, air is forced upwards through the drying tower, where moisture and contaminants are removed and a small amount 15% of air is diverted downwards through the regeneration tower where it depressurizes the desiccant bed to ambient conditions. Overall velocities are kept below 50 feet/minute so that air remains in contact with the desiccant for a minimum of 4.5 seconds. The entire process follows a 6-10 minute NEMA cycle, which consists of three to five minutes of drying time, 2 minutes and 25 seconds to 4 minutes and 20 seconds of regeneration and 40 seconds of re-pressurization.

Like all our desiccant-type air dryers, the QHD heatless air dryer system includes high-quality components and is backed by a two-year comprehensive warranty. For details, download the product brochure or contact a Quincy rep directly.

The QHP series of heated desiccant dryers features a built-in heating system that regenerates the offline tower using half the amount of air as our heatless products. This translates to improved efficiency, less wear and lower operating costs overall.

Nine configurations are available that can deliver between 850 and 3,400 CFM of dry air at 100 psig. Key components include the same high-performance switching valve system found in the QHD and a heavy-duty steel base. From the ground up, the QHD has been designed to ensure long life and low maintenance requirements, even when operating at high temperatures.

Operation is similar to the QHD, with the distinction that purged air passes through a heater before beginning the regeneration process. Because the air is hotter, less is required to absorb moisture from the desiccant beads. Air is forced through the system at a maximum of 50 feet/second, with up to 5.5 seconds of desiccant contact time during the drying phase.

QHP industrial desiccant air dryers run on an eight-hour NEMA cycle. The drying phase lasts four hours, the heating phase two and a half hours, the cooling phase one hour and twenty minutes and the re-pressurizing phase 10 minutes.

The QHP is available with the optional Quincy MicroBurst Regeneration (MBR) system, the only full-load energy saver available for use with heated purge desiccant air dryers. The MBR cuts purge requirements in half and greatly reduces heater on time. When equipped with the Quincy MBR, our Heated Purge dryers use 50% less energy. ROI can be realized within five months depending on dryer size and local power costs.

Quincy QBP dryers combine heat with forced ambient air for regeneration. As a result, they have a lower purge requirement than both the QHD and QHP desiccant dryer systems. The QBP is available in 13 different configurations that can produce between 210 and 3,400 CFM of dry air at 100 psig.

After air has passed through the drying tower, a small amount is heated and blown down through the purge tower, where moisture is removed from the desiccant. The blower component improves the overall efficiency of this process, requiring less air to perform the same amount of work. Sophisticated electronic controls and regulators automate the cycle, making it worry- and maintenance-free. Average purge levels are kept to 1.75%.

For optimal performance, run the QBP blower purge desiccant dryer with a Quincy reciprocating or rotary screw compressor and Q-Sorb desiccant. Under normal conditions, Q-Sorb drying beads can provide up to three years of continuous operation.

The Quincy QMOD is one of our most advanced desiccant dryer systems. Like the QHD series of products, these compact dryers use a portion of dried compressed air to regenerate the offline tower. Their small footprint has been designed to save floor space without compromising performance or efficiency, making them ideal for use in a crowded lab or tight compressor room.

Use the QMOD dryer to remove moisture, aerosols and mist from a stream of compressed air. A 0.01 PPM polishing pre-filter removes large impurities, while the units specially designed purification cartridges contain a high-performance desiccant and after-filter that completely removes remaining water vapors.

15 available models accept input from NPT pipe sizes between and 1, at flow rates from eight to 365 SCFM. A sophisticated electronic diagnostic and control center puts cycle information and other useful tools right at your fingertips, keeping operation and maintenance safe and simple.

Install the QMOD air desiccant dryer horizontally or vertically for maximum flexibility. A true modular system, the QMOD can be counted on to deliver instrument-quality compressed air in practically any situation.

Desiccant air dryer systems consist of a pair of towers containing silica gel or another desiccant. Quincy machines use our proprietary Q-Sorb product, an enhanced formula derived from activated alumina that provides improved absorption, lower pressure drop and higher crush strength.

As air passes through the towers, water vapor clings to the desiccant, effectively stripping it from the air until a desired moisture content is met. We measure moisture in pressure dew point (PDP). PDP refers to the temperature it would be necessary to cool air to achieve the same amount of dryness. For example, in many process industry applications, a PDP of at least -40F is recommended. In other words, air is required to have the same moisture level it would have at -40F.

Desiccant air dryers work in conjunction with an industrial air compressor. Their dual tower design allows you to time drying operations to a standard NEMA cycle, in which the one tower regenerates (purges) while the other performs the drying function. This prolongs desiccant life and allows for continuous operation for extended periods.

A desiccant air dryer system is an important component of any industrial operation in which compressed air of a uniform quality is required. Most air dryers run off electrical power. Because they are for continuous use, however, they can represent a significant operating expense over time. Thats why its important to choose a machine from a manufacturer you can trust.

Quincy Compressors has been in business since 1920. Our products are designed to work together to provide acomplete compressed air solutionfor any heavy-duty or industrial application. Our current line of products includes heatless, heated purge, blower purge and modular desiccants.Contact a sales representative in your area for assistance.

rotary dryer design & working principle

rotary dryer design & working principle

For evaporating moisture from concentrates or other products from plant operations, Rotary Dryers are designed and constructed for high efficiency and economy in fuel consumption.Whenever possible to apply heat direct to the material to be dried, Rotary Dryers of the Direct Heating Design are used. If it is not possible to apply heat direct to the material to be dried, Rotary Dryers of the Indirect Heating Design can be furnished so that the heated gases will not come in direct contact with the material.

Rotary Dryer is a simple, inexpensive unit for reducing the moisture content of flotation concentrates, as well as chemical and industrial products. Frequently the saving of shipping weight so effected will pay for the dryer in a few months. Difficulties from freezing while in transit are also eliminated. Many industrial projects are now using Dryers for control and production purposes on many materials.

Three main types of Rotary Dryers can be supplied. The direct heat unit is used when it is permissible for the drying gases to come in direct contact with the material being dried. Partition plates increase the heating surface. Drying may be by hot air or exhaust gases from other operations. If this drying gas has a deleterious effect on the product, then an indirect type of dryer can be supplied. A further derivation is the Tedrow Steam Dryer.

Of the different types of dryers that there are the most common is the ROTARY DRUM DRYER/Kiln, This type of drier is common not only in the mining industry but you will find them in fertilizer plants, Cement plants, and peat hogs to name but a few.

The theories behind these machines are very simple, heat an air space up, and then tumble the material to be dried through this space until it is dried. All though it sounds simple there are problems that have to be solved before the required results are met. But first, so you know what we are talking about lets go through the design of a drier.

First is the KILN, this provides the heat, The BURNER is inside this portion. The fuel for the burner is usually diesel although heavy crude oil could be used in some cases. To be able to generate enough heat to dry the concentrate air must be added by way of a BLOWER. In front of the kiln is the point that the wet concentrate enters the drier. It is put into the revolving SHELL. The shell is on a slight incline. As the Concentrate is tumbled through the hot air mass of the drier it travels down this incline to the exit of the drier.

At this exit point the concentrate is either deposited straight into a storage area or taken to the storage area by a conveyor. It is also at this point that there is an EXHAUST HOOD. This provides a controlled escape passage for the fumes and water vapor that is generated by the concentrate drying. This is a very important function and the operator will have to be sure that it is open at all times. If it should become blocked the water vapor will not be able to escape. The concentrate will become wet and sticky which will result in the discharge plugging. The wet sticky concentrate will also lower efficiency level of the drier for an extended period of time. This happens because inside the drier shell are what are termed FLIGHTS these are flat pieces of metal that are bolted onto the shell.

They are there to lift the concentrate up to the top of the shells rotation and drop the concentrate through the hot air. If the water vapor isnt taken away, the concentrate becomes sticky from reabsorbing the water. This sticky concentrate will fill the spaces between the flights.

The concentrate will not be lifted and dropped through the hot air. This results in a long term condition of poor performance even after the initial problem has been cured. These flights will remain buried in concentrate. This removal of the water vapor is one of the functions of the blower. It assists the natural process of air movement as the hot air mass expands. To prevent the buildup of concentrate on the flights there are often CHAINS attached to them. As the drier revolves the chains slap the flights preventing concentrate from building up on dryers walls.

The drier shell is rotated separately from the stationary kiln section. To achieve the rotation a BULL GEAR is attached around the shell section. There are also two flat rings attached to the shell. These provide surfaces for support rollers to roll on. There is another problem that the inclined shell has, the incline causes the shell to want to slide in the direction of the incline. To prevent this additional rollers are attached to the last set of rollers.

rotary dryer - schmidtsche schack

rotary dryer - schmidtsche schack

SCHACK Rotary Dryers improve the energy efficiency of carbon black manufacturing. Their combustion chambers allow carbon black tailgas, characterized by a low caloric value, to be used as a fuel without supplementary firing. Approved SCHACK Rotary Dryers are based on indirect heating of the pellets. The surface of carbon black pellets has only little contact to flue gas and thus very low impact on the product quality.

rotary dryer -china henan zhengzhou mining machinery co.,ltd

rotary dryer -china henan zhengzhou mining machinery co.,ltd

After the welding of bases for supporting devices of supporting roller and catching roller, vibration aging treatment should be applied for remove the welding stress. Then, use vertical lathe and boring-milling machine for integration fabrication. This process can guarantee the requirement of fabrication precision and dimension & location tolerance. Installation accuracy of rotary kiln is obviously improved.

Rotary dryers are known as the workhorse of industrial dryers. They are able to process a wide variety of materials, and can lend a hand in nearly any industry requiring industrial drying solutions.The material inside the rotary dryer has heat exchange with the high temperature flue gas through shell rotating and material lifting by lifter.

Therotary dryerhas many good characters like: high drying efficiency, big capacity, high running rate, saving energy, easy for maintenance, long working life. Variety angle of the lifter will increase the heating exchange rate and short drying time.

Rotary dryer is mainly compose of driving device, supporting roller, thrust roller, cylinder, kiln inlet, kiln outlet and sealing device. 1. 2-3 supporting points can guarantee the contacting surface between supporting roller and tyre is paralleled with axis line of cylinder during installation. 2. Supporting device is antifriction bearing (occasionally uses slide bearing). This design has simplified the supporting device of supporting roller, and reduced the useless power loss during operation. It has the features like easy operation and maintenance. 3. Suitable shim between tire and shell will ensure the tire ring on the shell tightly to increase the shell strength. 4. The main driving system uses new type AC variable frequency technology. Compared with electromagnetic speed control and DC speed control, that can save energy, have large range & high precision of speed regulation, high efficiency and running smoothly. 5. Radial direction contacting type sealing device is adopted at kiln inlet and outlet. They are perfect suitable for dimension tolerance of cylinder and skewing movement of cylinder. This sealing devices feature is good performance, longer working life and easy for replacement.

what fuel sources can feeco's rotary dryers and kilns work with?

what fuel sources can feeco's rotary dryers and kilns work with?

Natural Gas/Propane.Natural gas or propane is a fuel option for both direct and indirect rotary kilns and dryers. While it is typically available in the developed world, there any many areas in the world where natural gas is not available, and therefore, not an option. Additionally, many countries are making tremendous efforts to reduce carbon emissions and move toward more environmentally friendly fuel sources.

Fuel Oil (diesel, #6, etc.).Fuel oil is ideal for remote locations, as natural gas pipelines are often limited to populated areas and developed countries. Additionally, fuel oil is not usually used when product color requirements are strict, because fuel oil can leave a soot and discolor the end product.

Electricity.Electricity is an option for indirect rotary dryers and indirect rotary kilns. Heating coils, or rods, next to the drums shell radiate heat through the shell. An advantage to electricity, compared to other fuel sources, is that is no emissions or exhaust gases are produced, and thus no gas treatment or exhaust system is needed. A disadvantage to electricity is that it can be costly.

Biomass Combustion. Biomass combustion is another energy source burning both dry fuel and wet fuel. This option is available on any dryer project that is running temperatures in the dryer below 1,200 degrees F.

rotary drum dryer machine overview

rotary drum dryer machine overview

When it comes to drying solid bulk materials, Baker-Rullman direct heat rotary drum dryer machines have been chosen for their rugged build, ultimate reliability and excellent ROI. Our direct heat rotary drum dryer machines rely on contact between the material and process gas to dehydrate a very broad variety of materials. The unique triple-pass dryer design is recognized for its efficiency, and ability to produce a consistent product output over extended operational periods. In the rotary drum dryer process, combusted gases mix with clean, heated air. The wet bulk material is propelled through the system via a hot gas air stream. The material is continuously lifted by the cylinder flights and showered through the concurrent stream of hot gases. The three full-length interlocked concentric cylinders rotate together to create the highest velocity possible in the inner-pass. As lighter particles quickly lose 60% of their moisture and move out of the cylinder, heavier/denser particles are retained until they also lose 60% of their moisture. Known for our industrial innovation and engineering expertise, Baker-Rullman is a worldwide leader in rotary drum dryer machine manufacturing, installation knowledge, drum dryer reconditioning services, and network of used drum dryers and portable rotary drum dryers rentals. Contact Baker-Rullman today to discuss your rotary drum dryer machine application.

Baker-Rullman offers rotary drum dryers in a variety of sizes to handle a wide range of product and customer requirements. For a complete list of industrial dehydration applications, please click here. Baker-Rullman will not only engineer the rotary drum dryer for the specific application, but can also design, fabricate, and supply all of the component parts of the dehydration system including the burner, furnace, cyclone, fan, ductwork, conveyors, truck dump stations, feed hoppers, and airlocks.

Baker-Rullman offers rotary drum dryers in a variety of sizes to handle a wide range of product and customer requirements. For a complete list of industrial dehydration applications, please click here. Baker-Rullman will not only engineer the rotary drum dryer for the specific application, but can also design, fabricate, and supply all of the component parts of the dehydration system including the burner, furnace, cyclone, fan, ductwork, conveyors, truck dump stations, feed hoppers, and airlocks.

Baker-Rullman technology is known, accepted, and proven on six continents. Hundreds of Baker-Rullman dehydration systems are currently in service in more than fifty countries and in almost every U.S. state.

Baker-Rullman's services extend beyond engineering and fabrication of rotary dryers and dehydration systems. With the same level of quality, cost efficiency, and customer focus, we also offer the following services:

rotary dryer: operating principle, classifications, uses, advanta

rotary dryer: operating principle, classifications, uses, advanta

The rotary dryer also known as tumbling dryer is an equipment employed to minimize the moisture content of feed materials by bringing it in direct contact with a heated gas. It consists of an inclined long drum or cylindrical shell often fitted with internal flights or lifters; rotated slowly upon bearings through which the material to be dried flow with a tumbling/cascading action in concurrent (for heat-sensitive materials) or counter-current flow with the heating air or gases.

The movement of the material is due to the combined effect of inclination of the shell to the horizontal and the internal tumbling action or mechanical turn over thus the name tumbling dryer. The nature of the feed determines the directions of gas flow through the cylinder and it is relative to the solid. This drying equipment can also perform batch or continuous processing of the wet feed.

A rotary dryer is said to be of the direct type if, by virtue of its design, heat is added to or removed from the solids by direct exchange between the gas and solids. The direct heat dryers are the simplest and the most economical class. They are used when direct contact with the hot gas or air is not detrimental to the fed.

When high temperature is required for the drying process in a direct-heated rotary dryer, a combustion chamber is used and when low temperature is required on the other hand, for thermolabile materials, steam coil is used.

Although there is an infinite variation of rotary dryers, which present characteristics suitable for drying, chemical reactions, mixing, solvent recovery, thermal decompositions, sintering and agglomeration of solids, the main types of rotary dryers include;

1. Excessive entrainment losses in the exist gas stream is possible especially if the material contains extremely fine particles due to the large gas volumes and high gas velocities that are usually required.

8 benefits of using a rotary dryer for drying bulk solids | 2016-05-01 | process heating

8 benefits of using a rotary dryer for drying bulk solids | 2016-05-01 | process heating

In many industrial processes, rotary dryers are relied upon for high capacity, consistent drying of bulk solids and for good reason. They offer innumerable benefits, both to the process and the product.

One of the most prominent components of a rotary dryer is a large, rotating cylinder called the drum shell. Drying air or process gas flows through the drum in co-current or counter-current modes. In co-current mode, material travels in the same direction as the process gas. In counter-current mode, material travels in the opposite direction of the process gas. Regardless of the direction of travel, the drying air comes in direct contact with the material being dried.

Rotary dryers are used both for post-drying and pre-conditioning. Post-drying is a method of reducing the moisture content of a final product. Pre-conditioning is a method of drying a material prior to subsequent processing.

For instance, by designing around a materials unique characteristics and the overall goals of the process, rotary dryers can attain optimum processing efficiency. Various material characteristics affect how the material behaves during the drying process. The characteristics of the material to be dried also influence dryer design to ensure the thermal processing satisfies the production goals. When designing a rotary dryer, consider key material characteristics such as:

In addition, site-specific factors can affect how a dryer performs and should be taken into account during the design phase. Typical factors include the humidity level, the elevation and ambient temperatures.

A multitude of components can be customized to suit most processing needs. Factors such as airflow configuration, flight design and pattern, percent fill, retention time and size will affect how the dryer performs to meet its intended goal. Additional customizations such as knocking systems, seal options and materials of construction can be combined to create an efficient drying solution tailored to your unique processing requirements.

When used to dry pellets or granules, rotary dryers offer an advantage over other drying mediums. The tumbling action on the bed of material further rounds and polishes the granules, knocking off any loose edges and creating a more refined product.

Rotary dryers are robust and offer a heavy-duty design. While they can be used to process fines, they are particularly adept at processing heavier materials such as those found in the mining industry. For this reason, materials commonly processed in a rotary dryer include potash, phosphates, gypsum, limestone, minerals and ores.

In addition to their heavy-duty processing capabilities, rotary dryers are perhaps most valued for their ability to churn out a consistent-quality product despite inconsistencies in the feedstock or process. Flights within the rotating drum lift and cascade material as it tumbles through the drum, preventing material clumps and promoting an evenly dried final product. They are able to take what is given lumpy or uniform, wet or dry and produce a quality product.

Rotary dryers are particularly valuable in settings where variance in the feedstock is a given such as when processing minerals. While a change in moisture or particle size distribution might leave a fluid bed drying operation at a standstill, a rotary dryer will continue to put out a fairly consistent product. This is also true of processing environments where upsets are likely such as power outages or lapses in fuel availability.

While rotary dryers do occupy a larger footprint than some other dryer types, this also means they offer significantly higher capacities. Rotary dryers can offer capacities ranging from as little as 1 ton per hour to in excess of 200 tons per hour. Continuous, high capacity processing is a necessity in many processing environments.

Rotary dryers typically require less energy than some other drying alternatives such as a fluid bed dryer. In addition, they offer the opportunity to save on energy costs when running at reduced capacities. For example, fluid bed dryers require a certain amount of energy, even when running at decreased capacities, because it takes a set amount of energy to fluidize a material. With a rotary dryer, however, energy consumption is reduced without process upset when running at lower capacities.

Heat transfer efficiency is increased with a rotary dryer through the use of lifting flights. The flights pick up the material and drop it through the airstream, creating a curtain of material as the drum rotates. Exposing the material to the airflow improves drying and moisture leveling.

Rotary dryers offer fairly hands-off operation. While a rotary dryer does need to be monitored, there are few things that can cause a process upset with a rotary dryer. There are also minimal variables to be adjusted, allowing for ease of operation.

Most rotary dryers are of the direct-fired type, meaning the material and drying air are in direct contact with each other. However, when ultra-fine materials must be processed, or the material to be processed must not come into contact with the drying air, an indirect-fired rotary dryer offers an effective processing solution. With indirectly heated rotary dryers, the drum is heated externally, and the material is dried through contact with the shell of the drum. This avoids any contact between the drying air and material. An indirect dryer is especially beneficial when entrainment of fine material is a concern. In conclusion, rotary dryers are the backbone of many modern industrial processes, helping to reduce the moisture content of final products and prepare material for additional processing. They offer a number of advantages for both the end product and the process itself. While rotary dryers are available in standardized models, a dryer tailored to the unique characteristics of the material to be processed will produce the most efficient and reliable results.

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