gzg fiber rotary steam tube dryer view rotary steam tube

used rotary steam tube dryers

used rotary steam tube dryers

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We've listed our inventory of used Rotary Steam Tube Dryer, by size or manufacturer. Most of our Rotary Steam Tube Dryer are available for immediate delivery and all are competitively priced. To see more information about the Rotary Steam Tube Dryer, click on the stock number.

Unused 79.2 diameter rotary drum dryer system. Brand new (installed, not run yet) (2) drums: Dryer drum (1) 6.6 diameter X 59 long; Dryer drum (2) 6.6 diameter X 56 long, heavy carbon steel duty drum construction (2 piece shell),...

rotary dryer - indirect rotary dryers manufacturer from pune

rotary dryer - indirect rotary dryers manufacturer from pune

Vacuum Dryers are widely used in the industry for drying of variety of the product. Vacuum dryers are batch type dryers ideal for drying of heat sensitive products, drying of product with solvents ( For subsequent solvent recovery), drying requirements necessitating achievement of very low moisture moisture or low oxygen drying environment to minimize oxidation or for explosion proven products.

In these Double Cone Vacuum Dryers, heat is supplied to double conical shaped rotating jacket. The material to be dried is kept in continuous tumbling within the rotating housing. Conical shape facilitates easy to drain out of material at the end of the batch.

New Avm Systech Private LimitedAVM House, Plot No. 3B-3, Part 1/3, Akurdi Industrial Estate D-1 Block, MIDC, Opposite Ador Welding Limited, Chinchwad, Pune-411019, Maharashtra, India

grain dryers | icm

grain dryers | icm

ICM has designed, built and installed more than 400 dryers, and most are still in service after decades of operation. Our drying technology delivers long-lasting dependability and adds value to animal feed products, which is why ethanol producers choose ICM more than any other dryer manufacturer.

ICM rotary dryers are ideal for evenly dehydrating fine particles, especially those with combustion sensitivity. Operators in over 150 plants have benefited from our systems ease of use, low maintenance and extended life thanks to durable construction and hassle-free part replacements. Every dryer features an array of built-in safety features for operational peace of mind.

We built on Davenport Machine Companys industry-leading technology to bring you the very best solution for steam-powered drying and cooking. ICMs steam tube dryers can be custom-fabricated to meet any application or load capacity.

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rotary dryers - an overview | sciencedirect topics

rotary dryers - an overview | sciencedirect topics

Rotary dryers are mainly used in the chemical and mineral industry. In the area of food, their most common applications are for dehydrating waste materials (citrus peels, vegetable trimmings) and animal feedstuffs (alfalfa). Rotary dryers consist of a metal cylinder with internal flights or louvers (Fig. 22.21). The cylinder is slightly inclined. The material is fed at the high end and discharged at the low end. Hot air is blown in cocurrent or countercurrent direction. As the cylinder rotates, the material climbs in the direction of rotation. When it reaches a position where its angle of repose has been exceeded, the material falls back to the bottom of the cylinder (Fig. 22.21). Most of the drying takes place while the material falls through the air blast. Using very hot air or combustion gases, rotary dryers can also function as roasters for nuts, sesame seeds, and cocoa beans. A detailed method for the design of rotary dryers, based on a heat exchange approach has been described by Nonhebel (1971).

Rotary dryers are often used for particulate material. Particles and hot air are continually fed to the drum. These large rotating drums have lifting flights which carry the particles upward as the drum rotates. The particles leave the lifting flight near the top of the drum and fall through the air stream. Heat is transferred to the particles both from the air and from contact with the dryer. The drums may have concentric sections so that the particles and air traverse the length of the drum up to three times. Residence time is on the order of minutes. Friable material, such as wafers or flakes, may be dried on trays or belts instead of in drums. Very fine material, such as fiber board furnish, might be dried in a tube dryer in which the air carries the fiber through the tube in seconds.

For particulate solids, a rotary dryer may help promote uniform and more rapid drying (Fig. 14.14). In the rotary cascade dryer, the material is placed in a rotating cylinder through which a hot air stream is passed. Flights on the cylinder wall lift and cascade the product through the air. In a variant, louvers are used instead of flights so that the product is mixed and rolled instead of dropped. The dryer is typically sloped, so that the product enters and gradually falls toward the discharge end. In direct rotary dryers, the air is passed through burners, and directly comingles with the product. Rotary dryers have been used to dry seeds, corn gluten, distillers grains, and some fruit.

A rice combine harvester usually performs with less loss of paddy; however, the potential shortcoming is that the paddy must be harvested at high moisture content, that is, ranging from 20% to 28%. The high moisture content of harvested paddy is conducive to rapid deterioration in quality such as discoloration, yellowing, germinating, and damage to milling quality.

The only practical means of preventing grain quality deterioration is immediate drying of high moisture paddy, because sun drying, the conventional method, is inadequate to guarantee the quality and quantity of the produce. Thus there is a high demand for mechanical drying facilities.

Most mechanical dryers available are suitable for rice millers and farm cooperatives that handle thousands of tons of paddy. Small-scale dryers were developed for farm use, such as a fixed bed dryer and solar rice dryer (Exell and Kornsakoo, 1977); however, those were not widely accepted because of the potential inconvenience in loading/unloading of paddy and unequal drying.

Jindal and Obaldo (1986) and Puechkamutr (1988) worked on accelerated drying of high moisture paddy using conduction heating for a rotary dryer. Their studies demonstrated the potential of high temperature for quick drying of paddy without significant damage to the grain. This technique is promising from an energy consumption point of view.

Puechkamutr (1985) developed a rotary dryer for paddy based on conduction and natural convection heating. Paddy was effectively dried from moisture content of 23% to 16% (w.b.) using a pipe heat exchanger at surface temperatures of 170C200C with a residence time of 3070s. Rapid drying and good milling quality of the paddy could be achieved with such a dryer.

A combination conductionconvection heating type rotary dryer was developed for on-farm drying as a first stage. It consisted of double cylinders: the external cylinder with 500mm diameter, attached to an inside surface with straight flight; and an inner cylinder, hexagonal in shape with an outer tray and firing device installed inside as a part of the inlet cylinder. The grain cascaded inside the external cylinder with a concurrent flow of air. Experimental results showed that about 3% of moisture content could be removed with single pass with a small reduction in milling quality (Likitrattanaporn, 1996).

Another study of a combined conductionconvection type rotary drum dryer was made by Regalado and Madamba (1997) on thermal efficiency. The fresh ambient air forced inside the drum in a counter flow direction of grain brought evaporative cooling of the hot grain as shown by the increase in moisture reduction whenever air velocity was increased.

A further improved prototype of a combined conductionconvection type rotary drum dryer used ambient air that was forced inside the drum in counter flow to the direction of the cascading grains. The grain was heated by conduction heating as drying proceeded and followed by convection heating as cooling occurred of the heated grain. The results showed that its partial drying capacity was approximately double that of the predryer developed by the International Rice Research Institute requiring only a single pass operation. Neither drum surface temperature nor ambient air velocity and their interaction influenced total milling recovery and head rice recovery.

Likitrattanaporn et al. (2003) designed and developed a combined conduction and convection heating rotary dryer for 0.5t/h capacity using liquefied petroleum gas (LPG) as the heat source, to dry high moisture paddy under farm conditions. The main aim was to find an affordable way of drying field paddy on the day of harvesting to facilitate handling and for higher returns of produce for the farmer. Emphasis was placed on operating conditions in which up to 3% moisture could be removed in a short time while grain quality should be closed to fresh paddy. Performance of the rotary dryer in terms of moisture removal, residence time, energy consumption, and milling quality were evaluated.

An experimental rotary dryer designed with concurrent flow system comprising two primary parts, a double cylinder and a discharge cover, is shown in Fig. 12.1. Forward movement of paddy takes place by inclination angle and rotary motion of the cylinder, while air is blown through the cylinder by the suction fan located on top of the discharge cover. A 1-hp motor with 1:60 reduction gear was used for driving the rotary dryer. The LPG lamp on the entry end heats up the air and heated air moves to other end by suction fan. During forward motion, paddy first contacts the outer surface of the inner cylinder where conduction heating takes place followed by a cascading action along the inside of the external cylinder resulting in convection heating. After this the paddy falls into the discharge cover and out of the dryer, while the suction fan sucks the moist air.

Relatively less moisture was removed during the last (third) pass at temperatures of 100C and 110C, that is, 1.5% and 1.7%, respectively. At 120C temperature, moisture content of 2.1% could be removed. Clearly, this is because there was less free water available at the third pass of drying.

The conduction and convection zones are shown in Fig. 12.2, along with the inlet and outlet temperatures of grain and the hot air. It can be seen that high temperature in the conduction zone can remove a higher amount of water than in the convection zone, which is, in turn, sucked out by hot moist air. It can also be observed that outlet grain temperature was dropped to the safe range (max. 52C) within a very short time (23min).

To demonstrate the dryers heat exchange efficiency, comparison of the effects of conduction heating and convection heating on moisture removal showed that the major moisture content of paddy was removed by the conduction heating for all temperatures, whereas the convection heating could remove moisture less than 0.4%.

Being designed as a mobile unit for drying paddy in the field, energy consumption is one of the most important aspects of consideration. The difference in weight before and after running a pass was recorded. A statistically insignificant difference was found in weight of LPG consumed at all temperatures. The average power consumption was, however, 0.6kWh and power of 0.46kg/h LPG. It was estimated that the operating cost of removing up to 1% of the moisture content of 1t of paddy was $0.23 in the first pass. The cost would increase up to $0.33 in the second pass and subsequently increase in the third pass depending on the availability of free moisture.

Likitrattanaporn et al. (2003) designed and developed a combined conduction and convection heating rotary dryer for 0.5ton hr1 capacity using liquefied petroleum gas (LPG) as the heat source, in order to dry high moisture paddy under farm conditions. The main aim was to find an affordable way of drying field paddy on the day of harvesting to facilitate handling and for higher returns of produce for the farmer. Emphasis was placed on operating conditions in which up to 3% moisture could be removed in a short time while grain quality should be closed to fresh paddy. Performance of the rotary dryer in terms of moisture removal, residence time, energy consumption, and milling quality were evaluated.

An experimental rotary dryer designed with concurrent flow system comprising two primary parts; a double cylinder and a discharge cover is shown in Figure 10.1. Forward movement of paddy takes place by inclination angle and rotary motion of the cylinder, while air is blown through the cylinder by the suction fan located on top of the discharge cover. A one horse power motor with 1:60 reduction gear was used for driving the rotary dryer. The LPG lamp on the entry end heats up the air and heated air moves to other end by suction fan. During forward motion, paddy first contacts the outer surface of the inner cylinder where conduction heating takes place followed by a cascading action along the inside of the external cylinder resulting in convection heating. After this the paddy falls into the discharge cover and out of the dryer, while the suction fan sucks the moist air.

Relatively less moisture was removed during the last (third) pass at temperatures of 100C and 110C, i.e. 1.5% and 1.7%, respectively. At 120C temperature, moisture content of 2.1% could be removed. Clearly, this is because there was less free water available at the third pass of drying.

The conduction and convection zones are shown in Figure 10.2, along with the inlet and outlet temperatures of grain and the hot air. It can be seen that high temperature in the conduction zone can remove a higher amount of water than in the convection zone which is, in turn, sucked out by hot moist air. It can also be observed that outlet grain temperature was dropped to the safe range (max. 52C) within a very short time (23min).

To demonstrate the dryers heat exchange efficiency, comparison of the effects of conduction heating and convection heating on moisture removal showed that the major moisture content of paddy was removed by the conduction heating for all temperatures, whereas the convection heating could remove moisture less than 0.4%.

Being designed as a mobile unit for drying paddy in the field, energy consumption is one of the most important aspects of consideration. The difference in weight before and after running a pass was recorded. A statistically insignificant difference was found in weight of LPG consumed at all temperatures. The average power consumption was, however, 0.6KWh and power of 0.46kg/hr LPG. It was estimated that the operating cost of removing up to 1% of the moisture content of 1 tonne of paddy was 0.23$ in the first pass. The cost would increase up to 0.33$ in the second pass, and subsequently increase in the third pass depending on the availability of free moisture.

Dried citrus peel is one of the most common feeds. It is manufactured by pressing peel through a rotary dryer and adding citrus molasses to help the drying process and help prevent the peel from burning. The moisture content of dried peel must be below 10%. Many experiments published in the 1970s have shown that dried orange pulp, partially or completely replacing cereals in concentrate mixtures, are particularly useful in reducing feeding costs in dairy cows, have no influence on production, and have a good palatability. Dried pulp has also been used in swine, which have been shown to utilize it at a ratio of up to 2025%. Besides its use as a substitute for maize, up to 20% in diet has no influence on the growth and production of laying hens. The dried pulp can be pelletized and is consumed more easily by ruminants with advantages of storage, shipping, and microbial spoilage. Pellets made from dried pulp have different dimensions, and several factors affect their characteristics, such as the energy used in pelletizing and the proportions of citrus molasses (about 515% of the total weight gives excellent results) used as binding agents.

Thermal desorption is a technology of physical separation based on heating the contaminated soil to volatilize water and organic contaminants. Soils are heated in a thermal desorption system, the rotary dryer being the most commonly used equipment. Thesystems require the treatment of the off-gas to remove particlesand contaminants. Its effectiveness depends on the contaminant. Decontaminated soil usually returns to the original site. Based on the operating temperature, these processes can be categorized into two groups: high-temperature thermal desorption ranging from 320 to 560C and low-temperature thermal desorption ranging from 90 to 320C. Thermal desorption can be used in a place where some other cleanup methods cannot be used, such as at sites that have a high soil contamination, and can be a soil remediation method that is faster than others.

Thermal methods may also be applied as an in situ technique. In this case, heat is applied to soil to volatilize semivolatile organic compounds (SVOCs), which can be extracted via collection wells and treated. It is a particular case of SVE. Heat can be introduced into the subsurface by electrical resistance heating, radio frequency heating, or injection of hot air or steam. Thermal methods can be particularly useful for dense nonaqueous phase liquids (DNAPLs) or light nonaqueous phase liquids (LNAPLs).

kadant inc. - case study: ethanol plant gains steam tube dryer capacity with rotary joint upgrades

kadant inc. - case study: ethanol plant gains steam tube dryer capacity with rotary joint upgrades

Corn, LP produces ethanol and distillers grains, a co-product of ethanol production. Distiller grains are dried in steam tube dryers to use as a protein rich additive in livestock feed. As their ethanol production increased, Corn, LP needed to increase their drying capacity.

Corn, LP uses three large steam tube dryers. These dryers are 60 feet long and 12 feet in diameter. Wet cake enters one end of the dryer and dried distillers grains exit the other. The dryers slowly rotate as steam heated tubes dry the product. Corn, LP had increased dryer throughput, but the steam flow was bottlenecked by the original rotary joints, which were beyond capacity.

Corn, LP worked with Kadant Johnson to replace the existing 8 rotary joints with 10 self-supported ELSN rotary joints (pictured below). Torque restraint pedestals were also designed and installed with the rotary joints to prevent damage to attached flex hose piping.

The larger 10 self-supported ELSN rotary joints have approximately 70% more flow capacity than the rotary joints they replaced, allowing Corn, LP to increase drying capacity. With the increased dryer capacity Corn, LP can increase ethanol and distillers grains production without the large capital investment of an additional steam tube dryer.

rotary dryers

rotary dryers

Weve built a reputation on building the best rotary dryers in the industry. All of our dryers are custom designed to suit the unique processing needs of your material. Whether you require low or high inlet temperatures, short or long residence times, counter current or co-current flow, FEECOs design team can design a rotary drum dryer for your application.

Rotary dryers are a highly efficient industrial drying option for bulk solids. They are often chosen for their robust processing capabilities and their ability to produce uniform results despite variance in feedstock.

The drum is positioned at a slight horizontal slope to allow gravity to assist in moving material through the drum. As the drum rotates, lifting flights pick up the material and drop it through the air stream in order to maximize heat transfer efficiency. When working with agglomerates, the tumbling action imparted by the dryer offers the added benefit of further rounding and polishing the granules.

All FEECO equipment and process systems can be outfitted with the latest in automation controls from Rockwell Automation. The unique combination of proprietary Rockwell Automation controls and software, combined with our extensive experience in process design and enhancements with hundreds of materials provides an unparalleled experience for customers seeking innovative process solutions and equipment.

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. Some of the most common industries and materials in which rotary dryers are employed include:

Unlike direct dryers, indirect dryers do not rely on direct contact between the material and process gas to dry the material. Instead, the rotating drum is enclosed in a furnace, which is externally heated. Contact with the heated drum shell is what dries the material.

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Our rotary dryers are built to the highest quality standards, with longevity in mind. The best part about buying a FEECO rotary dryer, is that you get the security of knowing your equipment is backed by over 60 years of experience, material and process knowledge, and a proven track record.

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