Tubular Coal Mill

タイトルまたは説明

The tubular coal mill is mainly used for pulverizing various hardness coal in thermal power plants, which is high adaptable, reliable operation and easy maintenance.

The tubular coal mill is driven by motor which rotate the tube through the rod-pin coupling, cylinder gear reducer and open big gear decelerating to drive. The grinding medium (steel ball) is filled in the tube of mill. When the tube is rotating the steel ball is lifted to a certain height by the centrifugal force and friction force, and then falls down by its own gravity. The coal inside tube is knocked and grinded by the falling steel ball. The coal pulverized is blown by the pneumatic equipment into the boiler for combustion or coal bunker for storage.

The static and dynamic lubrication is that the high-low pressure oil pump is also started simultaneously before the coal mill starts. In the critical situation the oil flow with high pressure enters the shaft through the hydrostatic pipeline, and float-lifts the coal mill rotation part to form the oil film on the shaft in order to improve the lubrication when the coal mill starts. When oil flow is continuously supplied by the low pressure after the coal mill starts the dynamic pressure lubrication is realized. The high pressure oil pump stop working after the mill normally rotates for 2-3 minutes, the shaft of coal mill is lubricated relay on the low pressure dynamic pressure lubricating.

The Parameter Table
Type	Diameter mm	Length mm	Rotation r/min	Ball Quantities (Max)		Feeding mouth Dimension （mm）	Output （t/h）
				Weight t	Filling rate
MTZ 2126	2100	2600	22.81	10	0.236	Ф600 600	4
MTZ 2133		3300		13	0.242	Ф650 650	6
MTZ 2532	2500	3200	20.63	18	0.244	Ф750 750	8
MTZ 2539		3900	20.77	22		Ф800 800	10
MTZ—W 2935	2900	3500	19.34	26	0.239	Ф850 850	12
MTZ 2935
MTZ—W 2941		4100		30	0.236		14
MTZ—W 2947		4700		35	0.24	Ф950 950	16
MTZ 2947
MTZ—W 3247	3200	4700	18.42	44	0.248	Ф1050 1050	20
MTZ 3247			18.52	40	0.225	Ф1120 Ф1310
						1120   1310
MTZ—W 3258		5800	18.42	55	0.213	Ф1120 1120	25
MTZ 3258			18.46			Ф1120 Ф1310
MTZ 3257		5700	18.54	50	0.194	1120   1310
MTZ 3560	3500	6000	17.57	59	0.217	Ф1300 Ф1450	30
						1300   1450
MTZ 3570		7000		69	0.218	Ф1350 Ф1550	35
						1350   1550
MTZ—W 3883	3800	8300	17	95	0.219	Ф1700 1700	50
MTZ 3865		6500		75	0.2	Ф1574 Ф1700	40
MTZ 3872		7200		85	0.205	1574   1700	45
MTZ 3879		7900		95	0.21	　	50
MTZ 3886		8690		105	0.213	　	55