Jiangsu-up of energy efficient environmentally friendly energy efficient roaster roaster of CDF CDF type roaster is 0-10mm (the best control in 3-8mm) coal (coal mining can sift) into the furnace with a mechanical air distribution board, high-pressure air to make the air distribution plate furnace coal particles and charge boil. Since the coal particles only about 1% of the charge, fluidized bed combustion process and the large area of ??contact with air relative velocity large, the raw coal into the furnace out of the furnace for a long time, and some difficult in other furnaces burning high permeability ash content, calorific value of low-quality coal can achieve a high degree of stable combustion burn, so the temperature uniform combustion, high efficiency, and its main advantages are: 1, strong adaptability to fuel that can burn a variety of low quality coal and slag ( heat reached 6270KJ / Kg can). 2, the combustion efficiency up to 95%. 3, furnace heat evenly, long life, fuel preparation simple. 4, flexible operation, regulation performance, stove heating up fast, and then start the shutdown, twenty or thirty minutes running at full capacity. 5, a uniform heating temperature stability, the dryer can increase 50-70% yield, more than 50% of other furnace economizer, slag carbon content less than 1% is a good cement admixture. 6, low labor intensity, easy to automate. Boiling furnace main technologies: 1, equal pressure air chamber, two-stage combustion, combustion stage using ∪ type separable and collect small unburned carbon particles, and extend their burn time (when not using the two-stage combustion, coal particles into the furnace should be less than 10mm, as defined by the coal particles is 0-5mm). 2, using the air distribution system becomes large aperture pitch hood, there is a good flow of quality and combustion process, reducing the side effects caused by air distribution wall uneven impact. 3, using a large excess air ratio, strengthen the furnace air agitation, enhanced combustion, the coal combustion in the furnace temperature uniformity, easy to control. 4, the suspension section structure using rational, flue gas velocity is low, a small amount of fine ash away, heating flue gas temperatures up to 1050 ℃, coal particles burn more than 90%. Name CDF3.0 CDF4.0 CDF5.0 CDF6.0 CDF7.0 CDF8.0 CDF9.0 CDF10.0 hearth area 3.2 1.18 1.5 1.86 2.25 2.72 3.68 4.25 heating capacity kj / h 4.98X106 8.16 X106 9.58 X106 1.28 X107 1.45 X107 1.78 X107 2.15X107 2.5X107 85-90% thermal efficiency of the flue gas outlet temperature ℃ 700-1050 hood quantity (a) 239 306 366 442,532,629,734,847 supporting fan model 9-19-5.6A 9-26-5.6A 9- 26-5.6A 9-26-5.6A 9-26-6.3A 9-26-6.3A 9-26-6.3A 9-26-7.1A supporting fan motor Y160L-2 Y180M-2 Y200L1-2 Y200L2-2 Y200L2 -2 Y225M-2 Y250M-2 Y280S-2 motor power (kw) 18.5 22 30 37 37 45 55 75