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Vertical Coal Mill

Coal vertical mill, also known as vertical roller coal mill, is the equipment developed by our company combining modern technology and powder manufacturing experience. The coal pulverizer integrates coal grinding and drying, with stable performance and energy-saving features. It is widely used in cement, electric power, iron and steel, metallurgy and other industries. Our grinding roller coal mill has simple process, compact equipment, less dust, low dust emission, and efficient combustion of coal powder.

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    Description

    The coal vertical mill is mainly composed of frame body, main motor, vertical reducer, grinding disc, grinding roller, hydraulic system, separator, sealing air pipeline, limit vibration damping device, grinding roller lubrication system and other components.

    vertical roller mill principal
    coal mill in cement plant

    Working Principle

    During operation, the main motor drives the grinding disc through a reducer, while hot air enters the vertical mill through the inlet. The raw coal is evenly fed into the center of the grinding disc via the conveyor. Under the influence of centrifugal force, the raw coal starts to move evenly to the edge and is crushed by the grinding roller. The crushed fine powder is carried away by the airflow from the air ring, and the qualified fine powder is collected and discharged as finished powder. Material that does not meet the fineness requirements is returned to the grinding disc for further grinding, and the difficult-to-grind sundries mixed in are discharged out of the main machine through the scraper.

    vrm cement mill
    vertical roller mill

    Advantages

    Coal Vertical Mill with High efficiency and High Capacity
    Compared with the traditional old vertical mill of the same type, the coal vertical mill can increase the output by 20-50%, and reduce the operating power consumption of the coal mill.
    High Quality Coal Powder Production.
    The coal vertical mill adopts advanced dynamic and static combination separator, which can effectively separate the particles in the coal grinding process and ensure the fineness and uniformity of the coal powder. At the same time, our coal vertical mill is equipped with advanced control system and coal grinding structure, which can precisely control the key parameters in the coal grinding process. This ensures the desired fineness and quality of the coal powder.
    High Safety of Coal Vertical Mill Equipment Operation
    Shanghai YingYong coal vertical mill equipment adopts reasonable equipment structure and safety measures. It has a sturdy body and reliable parts connection to ensure the stability and reliability of the equipment. In addition, the coal vertical mill is equipped with protection devices to ensure the safe operation of the equipment.
    Optimized Coal Vertical Mill Equipment with Longer Service Life
    The grinding roller sleeve can be turned over and used, which can prolong the life of wear-resistant materials. The grinding roller shaft is lubricated with thin oil, and adopts circulating forced lubrication, which has good stability and long service life.
    Scientific Body Design, Convenient Operation and Maintenance.
    The hydraulic device of the vertical coal mill makes it easy to turn out the grinding rollers from the outside of the machine, which is convenient for replacing the roller sleeves and liners, as well as for the maintenance of the mill. Also, it provides ample space for inspection work and makes maintenance operations very easy. In addition, the coal vertical mill does not need to pre-distribute material on the grinding table, and can be started without load, reduceing the trouble of starting up.
    Meet national environmental standards and minimize environmental pollution.
    Through it's unique design of sealing structure, the coal vertical mill system can maintain negative pressure to avoid dust spillage, and the noise is also effectively controlled. During the production process, a special air box type pulse dust collector is used for coal dust collection to ensure that the dust emission concentration meets the national standards. This environmental protection design makes the coal vertical mill meet the environmental protection requirements and have less impact on the environment.

    Parameters

    Application: used in pulverized coal injection, coal-fired boilers for power generation and heating boilers in the metallurgical industry, coal powder preparation in shaft kiln, coal chemical industry.

    Type specificationVRM800MVRM1100MVRM1250MVRM1300MVRM1500MVRM1700MVRM1900MVRM2200M
    Yield (t/h)3~55~89~1313~1718~2222~3030~4040~50
    Maximum feed size (mm)1520252530303540
    Raw coal moisture (%)<10
    Fineness of pulverized coal (200 mesh pass %)80
    Coal moisture content (%)≤1
    Main motor Power (kW)55110132180250-250315-280400500

    Note: The original coal Hastelloy index is ≥55

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