Sludge Rotary Kiln
Sludge is a kind of matter which is produced in the process of sewage disposal. It is a kind of complicated anisotropic body composed of organic pieces, bacteria, inorganic particles and rubber matrix. Sludge rotary kiln can make sludge into useful energy.
Application Range：widely applied to chemical, building, mining and metallurgy industry;
Applicable Materials：Industrial garage waste, sludge, waste, medicine waste, coal ash, ore slag, oily sludge, PVC material and etc.
1. Advanced technology and superior combustion method
The inner temperature of sludge rotary kiln is controlled at 700 to 800 degree centigrade. Because dangerous wastes will produce combustible gas after pyrolysis and gasification, the oil consumption amount can be greatly reduced.
2. Lower running cost and less thermal loss
Owing to the lower temperature in the running process of rotary kiln, there is less thermal loss. Owing to less flue gas contained in this system, installed capacity is accordingly reduced, which is beneficial to reduce running cost and investment.
3. Good adaptability and easy operation
Sludge rotary kiln can adapt to various sludge. The temperature of sludge rotary kiln is easy to control. Stable combustion can be realized. Sludge and fuel gas will move oppositely, which can make full use of waste gas and improve running efficiency.
Before sending sludge into rotary kiln, preheat the furnace with oil gas or fuel oil. Then, input dehydrated sludge cakes. Sludge will enter the rotary kiln from the high end and will be discharged from the lower end. Fuel oil will be injected through lower part. Therefore, the lower part holds the highest temperature and the higher end holds lower temperature. With the rotation of rotary kiln body, sludge will flow to lower part from higher end gradually. In the drying zone, sludge will be preheated first. After the moisture content of sludge reaching to 10% to 30%, the temperature of sludge and wet bulb of hot air will be about 160 degree centigrade. With constant speed of evaporation, the proper ignition point will be reached. In the combustion zone, distilled sludge will be fired. When the size of sludge particles is about 3 to 10 mm, combustion process is controlled by internal divergence. Therefore, the higher the relative speed of gas and particles is, the thinner the dust layer is and the faster the combustion speed is. The temperature in combustion zone can reach to 700 to 900 degree centigrade.
|Dimension||Power (kw)||Total weight (t)||Notes|
|Diameter (m)||Length (m)||Inclination (%)||Output (t/h)||Rotary speed (r/min)|
|Φ2.5×40||2.5||40||3.5||180||0.44-2.44||55||149.61||With vertical preheater|
|Φ2.8×44||2.8||44||3.5||400||0.437-2.18||55||201.58||Decomposition outside the kiln|
|Φ3.0×48||3||48||3.5||700||0.6-3.48||100||237||Decomposition outside the kiln|
|Φ3.0×60||3||60||3.5||300||0.3-2||100||310||Bauxite calcining kiln|
|Φ3.2×50||3.2||50||4||1000||0.6-3||125||278||Decomposition outside the kiln|
|Φ3.6×70||3.6||70||3.5||1800||0.25-1.25||125||419||Residual heat power|