PULVERIZED COAL GRINDING PROCESS

Grinding stage

Before pulverized coal grinding, it is necessary to dry the wet coal, and then continuously and evenly send it to the main grinding chamber for grinding. The ground fine powder is separated by classifier under the action of fan airflow, and the fine powder of qualified fineness enters the collection stage by the air outlet pipe.

Collection stage - Conveying stage

The fine powder after grinding rises under the action of the fan air flow and is sent to the classifier for classification, and the fine powder that reaches the qualified fineness enters the explosion-proof pulse dust collector by air outlet pipeline, and is separated out by the inertial force and directly falls into the bottom of the ash hopper. The remaining dust-containing gas enters the bag filtration area, with the extension of the filtration time, dust will accumulate on the surface of the bag, the solenoid valve will quickly flush compressed air into the bag, the dust on the surface of the filter bag will be vibrate, all dust will fall into the ash hopper, centralized collection and discharge.

Finished product stage

The pulverized coal obtained after grinding can be directly sent to the customer site for use, without additional downstream processing steps.