■ 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.
Even drying method is conductive heat transfer which uses saturated steam as its heat source, the temperature inside the dryer is not affected by outside air temperature and always kept high and steady because of unique drying mechanism which shut outside air out as much as possible. The unique drying mechanism which shut outside air out draws air inside the dryer in with blower and fan, heats the air with heat exchangers mounted on upper part in the dryer, and blows the heated blast onto the material to be dried which is being conveyed as the dryer is shearing and agitating repeatedly.  Although hot blast is generated intentionally and blew on the material to be dried, outside air drew in is not used for that purpose but highly-heated air inside of dryer is heated once again and blew on the material. Wet clothes are dried well within blowing wind and the same mechanism is applied to this hot air drying method, so that hot air is blew onto the material to be dried. It can be said that KENKI DRYER is a dryer with an epochal and unique drying mechanism which use both conductive heat transfer and hot blast even only saturated steam is used as its heat source.
Because of low-temperature drying using saturated steam, the components of the material to be dried are not changed and outstanding in safety and hygiene point of view. Also, the quality of the materials after drying is uniform and stable because of its unique drying mechanism based on International Patented Technology.

 

1-1. Four drying mechanism

 

 (1) Crushing and drying    
A material supplying device which has uniquely shaped blades being attached to two shafts and rotating constantly. It smashes solid and sticky materials such as sludge, and carries smoothly to the main body of the dryer.
  Steam are supplied into the two shafts so that the shafts and the blades are continuously heated.

(2) Agitation drying

2 shafts with patented blades attached inside the dryer rotate and move materials to be dried forward as they peeling, shearing, and agitating the material repeatedly.
Steam is inserted into the shafts and blades and the materials are always heated and dried by them.
Resident time within the dryer is controlled by changing the rotation speed, so that moisture contents can be controlled as well.

(3) Circulation drying

Air inside the dryer is drew in with circulation blower and returned to the inside after being heated as passing through steam heat exchanger mounted on upper part. 
Hitting the heated air incessantly at the top part of the material accelerates the drying progress. By applying the mechanism that wet clothes are dried well within blowing wind, hot air is generated intentionally and blew onto the materials which is moving forward as being peeled off, sheared, and agitated repeatedly. No outside air got in.

(4) Indirect drying
A heat exchanger is attached to outside of the dryer’s trough. Steam is supplied to the heat exchanger and the side and bottom parts of the dryer are heated up continuously. 

 


Four methods of drying process

 

 

 

1-2. Holding high-temperature

 

KENKI DRYER shuts outside air out, and continuously operates circulation heating which heats air inside the dryer and blows it on the material. Therefore, temperature inside the dryer is not affected by outside air and always kept high, and drying process is accelerated by blowing hot air on the materials to be dried. Even only saturated steam is used as its heat source, circulation drying introduces hot air drying at the same time and it can be said that KENKI DRYER is a dryer with epochal and unique drying mechanism which use both conductive heat transfer and hot blast.

hot air keeping high temperature KENKI DRYER

 

Water in exhaust air and amount of the water

 

KENKI DRYER exhausts water vapor inside of the dryer’s body with exhaust blower during it drying operation. If the water vapor is not exhausted, amount of water vapor in the dryer reaches to the amount of saturated vapor and materials to be dried get wet because of dew condensation even though they are being dried. The temperature of the air exhausted to outside of the dryer with exhaust blower becomes less than 100℃ and the released water vapor turns to water. The exhausted air can be simply released into the atmosphere though, it is also possible to treat the water in the exhausted air with water treatment facilities.
In case that exhaust air contains stench or certain level of dusts, the air may need to be treated with scrubber, etc.
However, according to the past KENKI DRYER’s result, scrubbers and dust collectors are not used so often but only water treatment facilities are. It depends on the materials to be dried though, the reason for the above results seems to be that the amount of water included in the exhausted air is very small.
KENKI DRYER is using circulated heating with the mechanisms that no fresh air is entered to the dryer’s body and that hot-air generated by heating air in the dryer is blew on materials to be dried. Therefore, there are small effects from the humidity of air outside and only water vapor within the dryer is exhausted as dehumidification under conditions which are nearly sealed up. The ventilation differs from the ones done by normal dryers.

exhaust air and water treatment KENKI DRYER 2018.4.21

 

 

■ Easy moisture content adjustment

 

sludge dryer kenki dryer check mark  As residence time of materials inside of the dryer can be adjusted by changing rotation speed of shafts, moisture content can also be adjusted.

 

Easy moisture content adjustment

 

 

■ Animation