Rotary dryer / Comparison of dryer KENKI DRYER / Sludge dryer, Slurry dryer, Waste dryer

KENKI DRYER which can dry sticky and adhesive materials that no other dryer can is an innovative drying apparatus having unique technologies with 2 patents in Japan, 9 patens in 7 abroad countries, 11 patents in total.  Please consider about KENKI DRYER as dryer for organic waste with high moisture content, sludge dryer, slurry dryer, dryer for digestive fluid from the methane fermentation and waste recycling dryer.
It has 11 patents in 8 countries which are Japan, Taiwan, the Unites States, France, Germany, the United Kingdom, Swiss and Canada.
Since amount of saturated steam used as heat source of KENKI DRYER is small, there is no need for installing new boilers, and decarbonization and fuel cost reduction is possible by using redundant steam from the plants.

Rotary dryer is continuous type dryer which hit hot air to the materials fed into cylindrical drum as it rotates.
Lifters are attached inside the drum and hot air hits to the materials while the materials are being lifted and agitated. Diameter and length of the rotary drum is designed regarding amount of material to be treated and it can manage a large amount as well.
For sticky and adhesive materials, however, high temperature heating is required to prevent adhesion and it causes a large amount of fuel cost and CO2 generation.
When sludges are dried with this dryer, fed materials tend to be lump shape like snowballs because of coagulant’s effects and heating with rotation, and dry state can be different between the surface and inside of the materials. In addition, it is necessary to pay attention to uneven heating and charring of dried products.
Since its heat source is hot air at high temperature, a large amount of fuel is consumed when hot air is generated with direct heating with burners etc. and also consumable parts need to be replaced frequently since their life is short. As a result, running cost becomes high.
Also, fireproofing and heat insulating materials which are expensive and requires long working hours for replacement needs to be replaced regularly.
Due to its high temperature heating, dusts scatter and make work environment bad, so it is necessary to install dust collectors although it is not required for KENKI DRYER.
Rotary dryer is a dryer which goes against the protection of global environment by consuming a large amount of fuel for its drying and generating a lot of CO2.

KENKI DRYER uses conductive heat transfer at low temperature with latent heat of saturated steam, therefore, its heat efficiency is good and its running costs such as for fuel and consumable parts are very low.
Since amount of saturated steam used KENKI DRYER is small and decarbonization and fuel cost reduction is possible by using redundant steam from the plants.
The low-temperature drying makes change of components of the materials fairly small and the dried materials can be use in various purposes such as raw-materials, fuel, soil conditioner, etc.
Even for sticky and adhesive materials that no other products can deal with, by unique technology which has international patents.
No matter how sticky and adhesive the material is, the dryer is never clogged.
Sludge discharged from wastewater treatment plants contains flocculants. They become lumps during the drying process, and it becomes difficult for heat to reach inside. The material to be dried are smashed during the drying process, so they does not form lumps and keeps their size small. Heat reaches inside of the materials and the materials are dried steadily and evenly.
It can run continuously for 24hour/day and no staff need to be on-site.
KENKI DRYER is an eco-friendly decarbonizing dryer which is safe and does not generate CO2.
KENKI DRYER has already started AI･IoT development.
Rotation speed control with AI.
Remote control with IoT.

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KENKI DRYER has three main characteristics. They are 1) Any materials can be dried as expected including sticky, adhesive and viscous materials and raw material slurry that no other company can deal with, 2) dried material can by recycled or utilized as raw materials because of its low-temperature drying method, and 3) there is no need to assign operator since its continuous operating system makes 24 hours unattended operation possible.

Products

The unique and original drying mechanism of KENKI DRYER is also International Patented Technology. Because 4 drying mechanisms which are crashing drying, agitation drying, circulation drying and indirect drying work simultaneously and add heat to material being dried repeatedly and continuously, inner part of the material is dried thoroughly and quality of discharged material after drying is stable. This series of drying mechanisms prevents agglomeration which causes insufficient drying from feeding process of the material into the dryer until discharging process after drying completed. Various ingenuities to conduct heat surely into inner part of the materials are exercised and stable heating and drying are proceeded continuously.

Methods

One of the International Patented Technology that KENKI DRYER has is a self-cleaning structure called Steam Heated Twin Screw technology (SHTS technology). No matter how materials are sticky, adhesive and viscous is, they can be dried without clogging inside of the dryer because of this unique structure that no other products has.
For example, even materials stuck to the blades of one screw, blades of the other screw in the dryer’s body forcibly peels the materials off as they rotate. Since the blades rotate by peeling the material off each other, any sticky, adhesive and viscous material does not adhere to the blade, and the blades continue rotating, peeling, agitating and heating material without stopping while they carries material further. Also, since surface of blades are always renewed and kept clean, heat near the blades is not blocked and it is conducted directly into the materials.

Self-cleaning screw

Even KENKI DRYER uses only saturated steam as its heat source, it is outstanding in safety and hygiene point of view with its unique drying mechanism based on combined use of conductive heat transfer method and heated air method. Since steam is a stable heat source, quality of discharged material after drying is also stable and equable. Maximum allowed steam pressure is 0.7Mpa and adjustment of steam pressure, adjustment of drying temperature in other words, can be easily done. Saturated steam is commonly used in many factories so that it can be said as a familiar and handy heat source. In comparison with drying methods using burner or hot blasts, saturated steam method is an indirect drying applying heat exchange via pipes that steam is passing through, therefore, it hardly burns the materials and is outstanding in safety and hygiene point of view.

Heat source, Steam