"Printing and dyeing sludge contains a large number of chemical residues, with high proportion of inherent water, is very difficult to dehydrate. Its composition is very complex, with high content of harmful substances and a certain degree of stickiness. After the mechanical filter, the sludge moisture content is still as high as 75 ~ 85%. However, the organic components in printing and dyeing sludge is very high. The calorific value of dry sludge can reach 2000kcal/kg, about 30% - 50% coal. With considerable energy use value, the dry sludge can be mixed with coal as boiler fuel, resulting in economic benefits. ZJN Drying equipment can maximize this benefits. General printing and dyeing enterprises are set up a large number of flue gas flue gas, ZJN can use the boiler flue air to dry sludge below 30% moisture. And the dry sludge will be small particles. It will greatly reduce the sludge storage and transportation costs and pollution risks. "