煤粉干燥机

Abstract

本实用新型涉及干燥机的技术领域，尤其是涉及一种煤粉干燥机，其包括回转筒，回转筒一端设置有进料口，回转筒内安装有中心火管，中火管位于回转筒内的一端封闭，中心火管的另一端设置有热风进口，环绕中心火管设置有回烟管，回烟管入口与中心火管的封闭端连接，回烟管出口向靠近热风进口方向延伸。回烟管循环转动，有利于搅散煤粉；热风将热量通过中心火管和回烟管传导至煤粉，增加了散热面积，延长了散热时间，从而提升了热效率；热风不再与煤粉直接接触，有利于对煤粉温度的把控，以降低煤粉自燃的风险；排出的热风可通入热风炉内，经过升温后再次供给中心火管，实现了节能降耗的效果。

Claims

1. A coal powder drying machine characterized by: It includes a rotary drum (1), one end of which is provided with a feed inlet (11). A central fire tube (5) is installed inside the rotary drum (1). One end of the central fire tube inside the rotary drum (1) is closed. The other end of the central fire tube (5) is provided with a hot air inlet (50). A return smoke pipe (6) is provided around the central fire tube (5). The inlet of the return smoke pipe (6) is connected to the closed end of the central fire tube (5). The outlet of the return smoke pipe (6) extends towards the hot air inlet (50).

2. The coal dust dryer according to claim 1, characterized in that: An exhaust hood (8) is provided at the higher end of the rotary drum (1), and an exhaust port (80) is provided at the top of the exhaust hood (8). A discharge hood (9) is provided at the lower end of the rotary drum (1), and a discharge port (90) is provided at the bottom of the discharge hood (9). An exhaust hood (7) is provided on the outside of the rotary drum (1) at the position corresponding to the outlet of the return smoke pipe (6), and an exhaust port (70) is provided at the top of the exhaust hood (7).

3. The pulverized coal dryer according to claim 1, characterized in that: A feeding screw (12) is installed on the inner wall of the rotary drum (1) near the feed inlet (11).

4. The coal dust dryer according to claim 1, characterized in that: A pipe support (60) is fixed between the central fire tube (5), the return smoke tube (6) and the inner wall of the rotary drum (1).

5. The coal dust dryer according to claim 1, characterized in that: The end of the central fire tube (5) away from the hot air inlet (50) is sealed by a sealing plate (51).

6. The coal dust dryer according to claim 1, characterized in that: A drive device (2) is provided at the lower middle part of the rotary drum (1). A transmission gear ring (10) that cooperates with the drive device (2) is provided on the peripheral wall of the rotary drum (1). A support roller device (3) and a stop roller device (4) are provided on the left and right sides of the drive device (2).

7. The coal dust dryer according to claim 1, characterized in that: Turbulence fins (52) are fixed to both the inner and outer walls of the central fire tube (5).

8. The coal dust dryer according to claim 1, characterized in that: Spiral heat transfer ribs (61) are fixed to the outer wall of the flue pipe (6).

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