Vertical pulverized coal mill integrates grinding, homogenization, drying, powder selection and conveying functions. Due to its simple structure, easy operation and low requirements for materials, vertical mill pulverized coal preparation has been widely used in recent years. When pulverized coal is prepared, it is flammable and explosive, and under storage conditions, pulverized coal will slowly oxidize and heat up, eventually leading to spontaneous combustion. A good control process is required to ensure safety. As a manufacturer of vertical pulverized coal mills,HCM Machinery will introduce to you the process of preparing pulverized coal for vertical mills.

The vertical mill pulverized coal preparation process includes the following steps:

1) Raw material batching and feeding: Limestone, raw coal and gravel coal are fed into the pulverized coal vertical mill through a quantitative feeder respectively: limestone, raw coal and gravel coal are placed in the auxiliary material batching bin, raw coal bunker and gravel coal bunker respectively. : Quantitative feeders are respectively installed at the bottom of the auxiliary material batching bin, raw coal bunker and gravel coal bunker:

2) A low-oxygen extracorporeal circulation system is provided on the pulverized coal vertical mill:

the gas external circulation system includes a circulating fan, a heat source system, an inert gas supplementary pipe and an explosion-proof bag dust collector: the explosion-proof bag dust collector is connected to the pulverized coal vertical mill. Mill connection: the circulating fan is connected to the explosion-proof bag dust collector and the inert gas supplement pipe: the inert gas supplement pipe is connected to a heat source system that supplements the low oxygen content heat source gas to the pulverized coal vertical mill to control the low oxygen in the extracorporeal circulation system The limiting oxygen content does not exceed 12%; the ingredients fed into the vertical pulverized coal mill are ground in a low-oxygen extracorporeal circulation system environment; the slag outlet of the vertical pulverized coal mill is connected to the gravel coal bunker.

3) Pulverized coal storage: The pulverized coal coming out of the explosion-proof bag dust collector enters the storage silo; a fire extinguishing system is installed on the storage silo, the explosion-proof bag dust collector and the pulverized coal vertical mill; then it is discharged from the storage silo The pulverized coal is shipped in bulk.

The vertical mill pulverized coal preparation process has changed the original problem of disordered discharge of gravel coal and serious pollution in the process of preparing pulverized coal. A low oxygen extracorporeal circulation system has been added to prepare pulverized coal efficiently and cleanly. Adding limestone can make The SO2 produced when the prepared pulverized coal is burned is converted into solid CaS04, thereby reducing exhaust gas emissions and achieving the calcium-based sulfur fixation effect: it is safe, efficient, energy-saving and environmentally friendly. The HLM series of pulverized coal vertical mills produced by HCM Machinery have been widely used in the vertical coal pulverized coal preparation process. If you have relevant needs, please contact us to learn about the vertical coal pulverized coal preparation process. Email address:hcmkt@hcmilling.com