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Sawdust Drying Machine

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Typical Applications: Ideal for removal of moisture from free flowing materials which is light and small like sawdust, rice shell, milled stalks etc.; suitable for small production scale below 700kgs per hour. Comparing with rotary dryer, it has the advantages of low energy comsumption, low cost, it’s in simple design but have good effect as well. Suitable fuels for the boiler are wood waste, coal etc.

Sawdust Dryer Model BBHGJI


Drawing Of Sawdust Dryer Model BBHGJII

(1)Dryer model BBHGJ-I, BBHGJ-II, BHGJ-III for lower moisture content 12-25%

The Moisture reducing rate of the dryer BHGJ-I, BHGJ-II, BHGJ-III is 8-12%. This dryer is equipped with one hot air boiler, it is suitable for drying raw material with moisture content less than 20-25%.If the moisture content of the raw material is higher than that, it will need two or three times of dry up to achieve the requested moisture content for briquetting.

Capacity(Kg/hour) 200-250KG 400-500KG 500-700KG
Size of Input Material
<3mm & < 5mm <3mm & < 5mm <3mm & < 5mm
Temperature of Hot Air 180°C~250°C 180°C~250°C 180°C~250°C
Consumption of Wood Waste 15-20 kg/h 25-30kg/h 30-35kg/h
(Centrifugal Fan+Air Lock)
4kw+1.5kw 5.5kw+1.5kw 7.5kw+1.5kw
Net/Gross Weight 700/800kg 1200/1300kg 1800/1900kg
Dimension(m) 6×2×3.65m 9×2×3.65m 11×2×3.65m

(2)Twin boiler dryer model NBHGJ-II, NBHGJ-III for higher moisture content 20-50%

Twin boiler dryer is a newly developed dryer with two hot air boilers, it is suitable for drying raw material with moisture content of  20% -50%, it can reduce moisture from 20%-50% to 8-12% only one passage or one time.
PS: For raw material of moisture 20-35%, only fire and use the first boiler, no need to use the both.

boiler dryer

Capacity(Kg/hour) 400-500KG 500-700KG
Size of Input Material
< 3mm & < 5mm <3mm & < 5mm
Temperature of Hot Air 180°C~250°C 180°C~250°C
Consumption of Wood Waste 60kg/h 100kg/h
Moister content max % 20-50% 20-50%
Moisture of material after drying 8-12% 8-12%
(Centrifugal Fan+Air Lock)
7.5kw+0.75kw 11kw+0.75kw
Net/Gross Weight 2040/2260kg 2850/3080kg
Overall dimension(L*W*H) 9m*2.4m*4m 9m*3.2m*4m
Packingsize 11 M3(3 cases) 14 M3(3 cases)

Drying is important for the proper preparation of materials prior to their briquetting. To make good quality briquettes with high density, it is very important to control the moisture content of raw material to 8-12% before loading the them into briquette machine, so sawdust and other kinds of biomass need to be dried first.

Operation principle: The whole system consists of fan blower, motor engine, fuel boiler, steel pipe, cyclone and air lock.
In this system, wet material is input into the hopper by screw feeder; Fuel furnace produces large volume of hot air, those hot air is driven into steel pipes, mixed with wet sawdust and moved through curving pipes and drying chamber by the power of fan blower. Fast moving hot air sustains and is mixed with raw material sent by spiral feeder in the suspending state through the steel pipe, moisture evaporates as the material traverses along the steel pipe and is rendered dry at the discharge end. Humid air is continuously exhausted, thus the material is dried. The air lock in the outlet stops the hot air to be exhausted to the atmosphere, but release the dried material via cyclone.

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