Direct HZG heating characteristics of rotary drum dryers
To a high degree of mechanization and dryer, large capacity
Small fluid resistance through the shell, low consumption function
The adaptability of the material properties were relatively strong
Stable operation, low operating costs, product uniformity of the dry well
HZG direct heating type rotary drum dryers working principle
◆ wet material from the dryer after the end of input, including simple copy cloth boards are turning device, the material distribution in the dryer and spread evenly with and flow (current) full contact with the hot air to speed up the dry heat transfer , mass transfer driving force. In the drying process, materials with a gradient of copy in the board and the role of thermal air currents, to exercise control to another section of the dryer exhaust valve discharge star product.
HZG direct heating type rotary drum dryer applications
Applicable to chemical, mining, metallurgy and other industries large particles, drying than significant, such as: ore, blast furnace slag, coal, metal powder, phosphate, ammonium sulfate
Special requirements of the powder, the dry granular materials, such as: HP foam, distillers residue, precipitated calcium carbonate, activated clay, magnetic powder, graphite, dregs.
Require low-temperature drying, and the need for large quantities of dry materials.
HZG direct heating type rotary drum dryers technical parameters

形式	直接加热顺流式	直接加热顺流式	直接加热逆流式	直接加热逆流式	复合加热	复合加热
物料种类	矿石	HP发泡剂	高炉矿渣	硫铵	磷肥	煤
处理量kg/h	1000	466	15000	20000	12000	5000
初含水量%	30	13	6	1.5	5	6.5
终含水量%	15	0.3	1	0.1	0.1	0.1
平均粒径mm	6.5	0.05	4.7	0.5-1.7	0.5	5
物料堆积重量kg/m3	770	800	1890	1100	1500	750
热风量kg/h	39000	5400	10750	9800	6500	16000
入口气体温度℃	600	165	500	180	650	570
物料出口温度℃		42	100	70	80	75
加热方式	煤气	蒸气式电加热	重油	燃煤热风炉	重油	重油
装料系数%		6.3	7	7.5	7.8	18
转速r.p.m	4	4	3.5	3	4	2
倾斜度m/m	0.04	0.005	0.03	0.05	0.05	0.043
抄板数目	12	24	12	22	内筒外面8 外筒内面16	6       12
干燥器直径m	2.0	1.5	2	2.3	外筒2 内筒0.84	外筒2.4 内筒0.95
干燥长度m	20	12	17	15	10	16
驱动功率kw	22	7.5	15	11	11	15