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Coal Mill | Coal Vertical Roller Mill Coal Fired Power Generation
High Capacity Environmental Protection
Product Introduction:
HVM vertical roller mill is an energy-saving grinding equipment
that combines mature vertical grinding technology, successful
foreign experience, and our company's technological innovation and
upgrading. It integrates crushing, drying, grinding, grading, and
conveying, and can be widely used in industries such as cement,
electricity, metallurgy, chemical industry, non-metallic minerals,
and focuses on the three major fields of non-metallic minerals,
coal powder, and slag.
Performance characteristics:
1. High grinding efficiency and low operating costs.
2. Low construction and investment costs.
3. Simple and reliable operation, convenient operation and
maintenance.
4. The equipment has strong drying ability and a wide range of
grinding materials.
5. The product quality is stable and the particle size distribution
is uniform.
6. The equipment is environmentally friendly, with low noise, less
dust, and a clean operating environment.
Working principle:
The LM vertical grinding machine is mainly composed of a separator,
grinding roller device, grinding disc device, pressurization
device, reducer, electric motor, housing, and other parts.
During operation, the electric motor drives the grinding disc to
rotate through the reducer, while hot air enters the vertical mill
through the air inlet. The material falls better on the grinding
disc from the discharge port. Due to centrifugal force, the
material moves better from the grinding disc towards the edge of
the grinding disc. When passing through the annular groove on the
grinding disc, it is crushed by the grinding roller, and the
crushed material continues to move towards the edge of the grinding
disc until it is carried away by the airflow at the wind ring, And
the large particles of material fall onto the grinding disc and
continue to be crushed. When the material in the airflow passes
through the upper separator, under the action of the guide vanes,
the coarse material falls from the cone bucket onto the grinding
disc, and the fine powder is discharged from the mill along with
the airflow and collected by the system's dust collector. The
collected powder is the product produced by the vertical mill. The
material is dried during contact with the gas in the shell to
achieve the required dryness and humidity of the product. By
adjusting the angle of the guide vanes of the separator (not
adjustable for small vertical mills) and the speed of the separator
rotor, the required thickness of the product can be achieved.
Parameter Table of Coal Vertical Mill
Specification | HVM1250 | HVM1300 | HVM1500 | HVM1700 | HVM1900 | HVM2200 | HVM2400 | HVM2800 |
Grinding table median diameter(mm) | 1250 | 1300 | 1500 | 1700 | 1900 | 2200 | 2400 | 2800 |
Capacity(t/h) | 10-15 | 10-15 | 14-22 | 20-28 | 26-35 | 35-45 | 45-56 | 70-90 |
Coal Moisture(%) | <15 | |||||||
Coal Power Fineness(%) | R0.08=2-12 | |||||||
Coal Power Moisture(%) | ≤1 | |||||||
Main Motor Power(kw) | 110/132 | 160/185 | 220/250 | 315/355 | 400/450 | 450/500 | 560/630 | 900/1120 |
Structural composition:
The vertical mill consists of a grinding disc, a grinding roller, a
powder selector, a pressure device, a monitoring device, a
transmission device, a water spray system, and a coarse powder
external circulation system.
1. Grinding disc: including guide ring, wind ring, material
blocking ring, lining plate, disc body, scraper plate, and lifting
device.
2. Grinding roller: The roller sleeve is a wear-resistant component
that requires sufficient toughness and good wear resistance.
3. Powder selection machines can be divided into three categories:
static, dynamic, and combined powder selection machines
4. Pressure device: hydraulic device, energy storage device.
5. Monitoring device: Rocker arm monitoring, vibration monitoring.
6. Transmission device: electric motor, reducer.
7. Water spray system: reduce temperature and stabilize material
layer.
8. Coarse powder external circulation system: elevator.
Engineering Cases
Engineering Design and Equipment Manufacturing Supply of HVM2800M
Vertical Pulverized Coal Preparation System
Processing material type: bituminous coal
Capacity: ≥ 80t/h
Product fineness: 200 mesh, 85% pass