Sludge drying

No matter how sticky, adhesive and viscous the material is, KENKI DRYER of International Patent can dry it without clogging inside of dryer and with stable operation that no operational trouble occurs because of its unique mechanism. 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.
Sludge after dehydration process of waste water treatment is often affected by flocculants and forms large lumps, and it frequently happen that only surface is dried but inside are not when sludge is discharged as large lumps.
In the drying process of KENKI DRYER certificated as International Patent, the material to be dried are moved forward into the dryer’s main body smoothly by being heated and crashed with a feeder at inlet. The materials get smaller and smaller since they are continuously sheared and agitated during being conveyed and heated. As the material get small, heat reaches to inside more smoothly and surely, and quality of outputs becomes stable.
Since KENKI DRYER has simple structure, initial cost is low and is estimated to be repaid with cost of industrial waste disposal for about 2 -3 years. Also, even heat source of drying is only saturated steam, epochal mechanism based on combined use of conductive heat transfer method and heated air method helps to achieve high quality of safety and hygiene, and running cost can be kept low by using surplus steam within factory. Machine operation is easy and there is no need to assign operators because it is continuous operating system. Since number of replacement parts is small, maintenance is easy and maintenance cost is very low.
Because of low-temperature drying, components of the material to be dried are hardly changed and organic sludge can be sold as fuel, fertilizer, etc. after being dried. Because the low-temperature drying does not use fire, temperature of the dryer’s outer surface is low and the dryer is safe and hygienic. Because fresh air from outside is cut off, temperature inside of the dryer is kept high, amount of moisture in the exhaust air discharging water is small, and the discharged water can be returned to wastewater treatment facilities. 
Since KENKI DRYER consumes small amount of saturated steam as its heat source, there is no need to introduce additional boilers and also decarbonation and fuel cost reduction are possible by using left-over steam in factories.

KENKI DRYER, with 11 patents in 8 countries, is an indirect steam dryer, but it is a completely unique product, different in structure from other similar indirect steam dryers. The KENKI DEYER uses steam as a heat source, but its high drying heat efficiency means that less steam is used. The use of excess steam is not costly in terms of fuel costs, and the dryer does not emit carbon dioxide during drying, allowing for decarbonized drying. Alternatively, by installing an electric boiler, no greenhouse gases or CO2 emissions are generated during drying. The KENKI DRYER is a continuous dryer, not a batch dryer that stores and dries materials to be dried. Therefore, the KENKI DRYER is easy to manage and can operate unattended 24 hours a day.

KENKI DRYER dries uniformly, has no problems after installation, is easy to maintain and has low operating costs. The KENKI DRYER has been well received by companies that have installed it for its improved productivity, high performance and durability without the need for manual labor.

Patented in Japan, U.S.A, Taiwan, France, Germany, UK, Switzerland, Canada.

1. Comparison with hot air dryer

2. Comparison with indirect dryer using steam

Competitive comparison

Self-cleaning screw

Global patents

Heat source, Steam