SUPER HEAT DRYER
Characteristics
No production of waste water
During the operation, waste steam (including BOD and COD) is treated at higher than 700 deg.C. in the super heat steam generator and deodorizer, and converted into odorless gases under high temperature oxidization. The processed gas is emitted into the atmosphere as a non-pollutant. No waste water is produced.
No emission of hazardous smells
During the process, any elements of hazardous odours are completely broken down in the super heat steam generator and deodorizer. Therefore no hazardous smells are emitted.
Energy saving by recovery of waste heat
It is possible to reduce fuel consumption substantially through the process of drying the loaded material using the waste heat generated by the deodorizer.
High heat efficiency with super-heated steam
Ingredients can be dried with a high heat efficiency by using the high-calorie, super-heated steam which is generated from the decomposition of waste steam under high-temperature oxidization.
No generation of powdery fine dust
The process does not employ any carrier air to conduct the waste steam, therefore there is no production of fine particles or dust.
No waste gas from the dryer
A traditional direct heat dryer generates a lot of hazardous smells during the process, because there is direct contact between the hot air and the material to be dried. However, with the super heat dryer, the material is heated indirectly through the jacket of the shell, and so no waste gases are produced at all.
The super heat dryer is capable of treating all kinds of materials (both solid and liquid), regardless of moisture content
The advantage of the design of the super heat dryer, with its centrifugal heating system, is that all types of wastes (from liquid to solid) can be dried, by changing the rotating speed and the centrifugal force respectively.
Four times greater heat efficiency compared to traditional indirect direct hot air dryers
The super heat dryer forces the ingredient into a thin layer against the heating panel under a rotating speed of more than 10m/sec. This brings its heat efficiency up to a level between 4 and 6 times greater than that of traditional dryers; this is the result of speed in heat transfer, plus the fact that material with a higher water content reaches the heating panel faster.
With uniform drying, the moisture content of the dried product can be brought down to a value of between 10 and 0.1%.
The key factor in the process is turning the ingredient into a thin layer which is subject to continuous centrifugal force, thus forcing the material with higher moisture content to be forced against the heating panel, where it evaporates instantly. As the de-moistured material loses its weight, it is naturally replaced by material with a higher moisture content. This cyclic up-and-down motion is what makes it possible to dry the material evenly.
Step-by-step expansion
Owing to the method of heating employed by the vertical-design dryer (centrifugal force and thin-layer contact with the heating panel), flexibility in the length of the drying period is enabled , thus making it easy to bring in an expansion of capacity. Any expansion can be managed step-by-step, according to the quantity of the dried product. In this way it is unnecessary to install full capacity at the initial stage.
Lower costs for ancillary facilities
As a result of the vertical design, the size of the body is less than a quarter compared to that of a traditional dryer; thus, not only the body itself, but also the ancillary equipment and plant, such as the boiler, electrical works, and foundations require lower costs. Additionally, the size of the building and the access and total site areas are smaller and therefore more cost effective.
Free choice of site location
Owing to the simple and light-weight structure, it is possible to locate the dryer on a rooftop or inside an existing building. The dryer can be installed almost anywhere, because only a small space is needed around the apparatus. When compared to traditional systems, this apparatus really has broken new ground.
Easy maintenance
The simple apparatus is fitted with bearings only in the upper and lower interior of the shell for the rotating shaft and the geared motor. Such equipment is available everywhere on the retail market. This is why the apparatus rarely if ever gives trouble, and routine inspections are required once a day or every second day.
Trouble-free or automatic operation is possible
The main steps of the process of the super heat dryer are: loading the ingredient to be dried, heating indirectly by super-heat steam, and discharging the dried product. It’s that simple! The apparatus is easy to manage, even for non-skilled personnel, and automatic operation is also available.
