What is clean pulverized coal production line?

Coal, as a non-renewable resource, is also an important energy source, and is also used in metallurgy, chemical industry, cement, electricity, heating, heating, boiler and other industries as a high-quality fuel. To apply coal in the mentioned industries, we need to process lump coal into coal powder, which is why we need clean pulverized coal production line.

Application of coal powder

Clean pulverized coal is mainly used in four fields, which are the preparation of pulverized coal for efficient boilers, pulverized coal for lime kilns (rotary kilns), pulverized coal for blast furnace injection and pulverized coal for coal chemical industry.

Clean pulverized coal production line

System composition

The clean pulverized coal production line mainly consist of raw material warehouse, weighing coal feeder, grinding mill, dust collector (explosion-proof dust collector for coal grinding), fan, iron remover, drying system, conveying system, etc.

Production process

1. The raw coal is screened through the grid mesh from the raw coal storage yard and falls onto the large-angle belt conveyor or elevator. After the iron is removed by an electromagnetic iron remover, the belt conveyor or elevator sends the raw coal to the raw coal bunker for storage.

2. After the grinding system has been started, open the rod valve at the bottom of the raw coal bin, start the sealing and metering belt coal feeder, and the raw coal enters the grinding mill for drying and grinding.

3. The hot air or exhaust gas from the hot air furnace enters the coal grinding mill under the suction of the system fan, and after sufficient heat exchange with the raw coal being ground in the grinding mill, the coal powder is picked up and sorted at the separator. The coarse coal powder with unqualified fineness falls back onto the grinding disc for grinding, and the qualified coal powder enters the explosion-proof air case pulse dust collector with the airflow to be collected, and is discharged into the coal powder bin through the dividing wheel.

4. The impurities in the raw coal, such as some coal gangue, metal blocks, etc., are removed from the grinding mill through the air ring and slag discharge port.

5. In the clean pulverized coal production line, the online analysis system of oxygen content is set up. When processing coal with high volatile content, safety measures such as nitrogen protection and CO2 automatic fire extinguishing system can be set up.

Grinding mill in clean pulverized coal production line

In the clean pulverized coal production line, grinding mill is the key equipment to ensure the fineness and quality of the produced coal powder. ZENITH recommends LM vertical roller mill and MTW series trapezium grinding mill for clean coal powder grinding process.

LM series vertical roller mill

-- One step preparation process - drying while grinding

LM vertical roller mill grinding system is the core of the clean pulverized coal production line. It integrates crushing, drying, grinding, and grading transportation, and achieves a one-step pulverization process of grinding and drying at the same time. This large-scale grinding equipment has condensed stable technological elements, equipped with a CO/O2 online analysis system, grinding roller hydraulic device, and automated electronic control device, making the entire grinding process intelligent, convenient, energy-saving, and environmentally friendly.

Application scope: It is suitable for users who require large output of pulverized coal and petroleum coke powder.

Processing capacity range: 5-100T/H

Advantages:

1. Leading technology

   The LM vertical roller mill has simple process, integrating crushing, drying, grinding, powder selection and transportation, with a compact layout and small floor area, reducing civil engineering and equipment investment. It adopts the principle of material layer grinding and the automatic pressure technology of grinding rollers, the efficiency is high.

2. Low operating costs

   The equipment is easy to operate and has a hydraulic roller flipping device. During maintenance, the grinding roller can be completely flipped out of the machine, making maintenance convenient. At the same time, the grinding roller adopts thin oil automatic lubrication system, which does not require manual labor and has low operating and maintenance costs.

3. High degree of automation

   Adopting fully automatic control system, remote control can be achieved, and the operation is simple and easy.

4. Efficient and environmentally friendly

   The entire system operates under negative pressure, without dust overflow, with high grinding efficiency and low energy consumption. Compared with traditional Raymond mill and ball mill, it can save 40% -50% of power consumption.

5. Large production capacity, wide adaptability, and simple operation

   ZENITH LM vertical roller mill has the advantages of large output, wide adaptability, simple operation, rapid adjustment, low maintenance cost, and energy conservation, making it a priority choice for clean pulverized coal production.

6. Safety

   The entire system has explosion-proof measures to minimize accidents and ensure on-site safety production for customers.

MTW series trapezium grinding mill

-- Two step grinding system – grinding after drying

The two-step powder preparation system involves drying and pulverization, which are carried out separately, first drying and then grinding. The main equipment adopts ZENITH MTW series trapezium grinding mill.

Application scope: Suitable for users with low requirements for coal powder production.

Processing capacity range: 2-30T/H

ZENITH MTW trapezium mill adopts bevel gear overall transmission, all three transmission systems are lubricated with thin oil, with small floor area, small investment, fast efficiency, convenient maintenance, and energy conservation and environmental protection.

Since its launch on the market, MTW trapezium mill has been identified through multiple technological achievements and has become a replacement product for traditional Raymond mills, pendulum mills, and ball mills, as well as preferred equipment for large-scale mineral factory construction.

If you want to invest in clean coal pulverized production, ZENITH will customize a new, safe and efficient clean pulverized coal production line for you. The system is applicable to anthracite, bituminous coal, lignite and other materials, and the processed pulverized coal is more uniform in particle size and fully burned.