coal vertical roller mill with air box pulse dust collector

Coal Vertical Roller Mill Overview

Compared with traditional coal grinding equipment, coal vertical roller mill can not only effectively improve the output and quality of coal powder, but also can perform well in environmental protection and energy saving, which is an important equipment in modern coal powder preparation process.

Features of Coal Vertical Roller Mill

1. High efficiency energy consumption ratio: Coal vertical roller mill through the optimization of the roller disc structure and working principle, to achieve the grinding process of small energy consumption, the efficiency is far more than the traditional coal grinding equipment.
2. Adjustable fineness: The equipment is able to adjust the fineness of coal powder according to different production requirements, with a wide range of fineness, which can generally reach the excellent standard of 80 μmR 3%.
3. Compact equipment design: Coal vertical roller mill adopts compact structural design, reduces the equipment footprint, simplifies the process flow, improves the integration and stability of the system.
4. Low noise and low dust: The equipment is equipped with a better sealing structure, and the use of advanced pulse dust removal system, less dust leakage in the production process, low noise, in line with environmental standards.

Advantages of Coal Vertical Roller Mill

1. Large capacity, high efficiency: Coal vertical roller mill compared with the traditional vertical mill, its production efficiency increased by 20% to 50%, in the same power consumption, can provide more coal powder production.
2. High Quality Coal Powder: Equipped with dynamic and static combined separator, it makes the grading efficiency of coal powder higher. The screen residue of coal powder can be controlled below 8%, which can meet all kinds of production requirements, and the cement industry’s strict requirements on the fineness and quality of coal powder.
3. High safety: The equipment is equipped with temperature monitoring devices and online gas analyzers and other safety protection measures, effectively preventing coal combustion and explosion and other safety hazards, to ensure the safety of coal grinding process.
4. Excellent environmental performance: The coal vertical roller mill system adopts negative pressure sealing structure, effectively preventing dust leakage. The coal grinding system is also equipped with air box pulse dust collector, which can ensure that the dust emission concentration meets the national environmental protection standards and reduce environmental pollution.

Working Principle of Coal Vertical Roller Mill

Based on its roller mill technology. Coal is fed into the mill through the drop tube, and the hydraulic loading device generates a large squeezing pressure between the grinding roller and the mill, and the raw coal is evenly distributed under the drive of the mill, and after extrusion and friction, the large particles of coal are crushed and gradually turned into fine coal powder. The relative movement of the grinding roller and the grinding disk makes the material form strong friction inside the mill, which further realizes the refinement of the material. At the same time, hot air enters through the vertical mill system, and the temperature is generally below 300°C, which can effectively dry the moisture in the coal and ensure that the dryness of the finished coal powder meets the standard.

The coal dust is conveyed into the separator through the primary air, and the qualified coal dust is sent to the coal dust bin for storage, while the unqualified coarse coal dust is returned to the mill for regrinding. In order to ensure the quality of coal powder, the design of the separator can be adjusted to flexibly respond to the production needs of different fineness requirements.

Application Areas of Coal Vertical Roller Mill

• Cement production: Coal vertical roller mill is widely used in the cement industry, for the efficient preparation of coal dust, can meet the demand for fuel coal dust in the process of cement production, improve production efficiency and reduce energy consumption.
• Electric power industry: This equipment is suitable for the preparation of coal powder in the electric power industry, which is used for boiler combustion, and can provide a stable supply of coal powder to ensure the efficient operation of the boiler.
• Iron and steel metallurgy industry: In the iron and steel metallurgy industry, coal vertical roller mill is used to crush coking coal or anthracite to produce high-quality coal dust, which can provide stable fuel for coke oven and heating furnace.
• Fertilizer industry: Coal vertical roller mill can also be used in the fertilizer industry, as a fuel supply equipment, to ensure a stable supply of heat source in the production process.
• Environmental protection field: Coal vertical roller mill has an important role in environmental protection because of its low noise and low dust emission, which is suitable for use in areas or enterprises with high requirements for environmental protection.