Heat source, Steam and Heat pump 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.

■ Heat source, Steam and Heat pump







■ Heat source, Steam / KENKI DRYER


Heat source of KENKI DRYER is saturated steam. Saturated steam is a safe heat source which is already in use in many places. The most used steam generator is once-through boiler.
Steam changes its phase when it hit materials to be dried which is cold, and large amount of heat of condensation is generated while the steam becomes gas to liquid. The amount of heat of the steam at that time is 2 to 5 times larger than that of sensible heat in hot water or oils with only sensible heat.
Since drying temperature can be adjusted by changing steam pressure, heating and dying can be done in the most suitable temperature for each material.
Since drying with steam uses low temperature, there are fairly small changes in components in the dried material, and the material can be used in various purposes such as raw materials, fuel, feedstuff, soil conditioner, etc. after being dried.
Drain from steam after the drying process can be re-used by being collected.
No staff need to attend since operation and maintenance are easy compared to dryers with high temperature, and maintenance cost is low since number of consumable parts is small in addition to the low fuel cost. 
In low temperature dryers, dryers often stopped by trouble cause by clogging inside though, KENKI DRYER never be clogged because of its unique technology which had international patents, and it can dry any sticky and adhesive materials that no other dryer can and continuous operation is possible without stopping.


■ Heat pump / KENKI DRYER


About use of heat pump for steam,
Heat pump doesn’t use heat energy of combustion, but it uses heat energy generated during phase change of steam.
Temperature is lowered while liquid in steam is vaporized by adiabatic expansion, temperature is raised while gas in steam is condensed to liquid by adiabatic compression, and expansion, condensation, compression and vaporization are taken place repeatedly and their heat energy is utilized.
Since heat pump does not use heat energy generated by combustion, fuel cost and CO2 emissions can be reduced significantly.
Heat pump has advantages in saving energy and reducing CO2 emissions, and it is a way of utilizing heat energy with low environmental load by not using combustion.



Hot air circulating mechanism KENKI DRYER / Sludge dryer, Slurry dryer, Waste dryer

Self-cleaning mechanism KENKI DRYER / Sludge dryer, Slurry dryer, Waste dryer

Effects and measures of flocculants in sludge KENKI DRYER / Sludge dryer, Slurry dryer, Waste dryer

Three major features KENKI DRYER / Sludge dryer, Slurry dryer, Heat pump sludge dryer

Drying process KENKI DRYER / Sludge dryer, Slurry dryer, Heat pump sludge dryer

Four drying mechanisms KENKI DRYER / Sludge dryer, Slurry dryer, Heat pump sludge dryer

Why do we dry sludge which is difficult to be treated? / Sludge dryer, Slurry dryer, Heat pump sludge dryer



■ Heat source, Saturated steam


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


■ Drying process


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.



■ Self-cleaning screw / Steam Heated Twin Screw Technology
( SHTS technology )


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


■ Product characteristics

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.



Please consider KENKI DRYER for drying of sticky materials, adhesive materials and materials in liquid state that no other dryer can deal with.
Initial, running and maintenance costs are low because of its simple structure based on internationally patented technology.
For sludge drying, costs of our dryers are estimated to be retrieved within 2, 3 years by reducing industrial waste disposal cost.
For raw material slurry drying, laborious works of manual operation will be decreased significantly by replacing box shaped compartment tray dryer with our dryer
In case of organic wastes drying, the waste can be recycled as fuel, fertilizer, soil conditioner and feedstuff after being dried.


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