Coal Dryer

What is Coal Dryer?

A coal dryer is a type of drying equipment that is specifically designed to dry various types of coal. It is an improved version of a rotary dryer and is capable of drying coal that is high in moisture content and tends to agglomerate. Zoneding Machine (ZDM) has developed a coal dryer that is suitable for drying different particles in the coal industry, including coal slime, fine coal, tail coal, and more.

The coal dryer utilizes a special device to break up wet coal, which enhances the efficiency of heat transfer during the drying process. The dried coal can then be utilized as a source of fuel in power plants or as a raw material in various industries.

Moreover, the coal drying machine can also be used to dry other materials with a certain level of humidity and particle size in industries such as building materials, metallurgy, mining, and more. This versatile drying equipment offers efficient and effective drying solutions for various applications.

Coal Dryer

Applications of Coal Dryer Machine

A coal dryer machine is a versatile equipment that can be used for drying various types of coal. It is capable of drying anthracite coal, lean coal, Mongolian coal, clean coal, nickel coal, coking coal, lignite, raw coal, soft coal, tail coal, mid coal, coal slime, and fly ash, among others. The specific type of coal dryer used will depend on the characteristics of the coal being dried.

There are different types of coal dryers available, including Mongolian coal dryer, coking coal dryer, raw coal dryer, nickel coal dryer, and clean coal dryer. These dryers are designed to cater to specific customer needs and requirements.

The applications of a coal dryer machine extend beyond the coal industry. It can also be used for drying other materials with similar characteristics, such as biomass, sludge, and industrial waste. The versatility of the coal dryer machine makes it suitable for various industries, including power plants, cement production, chemical plants, and more.

In summary, a coal dryer machine is a valuable piece of equipment that can efficiently dry different types of coal and other similar materials, catering to the specific needs of customers in various industries.

Examples of Coal Dryer Application

Working Principle of Coal Dryer Machine

The coal dryer machine operates on a simple and efficient working principle. The wet coal, with a certain level of humidity, enters the dryer through a dispersion device, which ensures that the coal particles are evenly distributed.

The dispersed wet coal is then fed into a rotating cylinder or drum through a feeder. Inside the drum, there are blades or lifters that lift and drop the coal as the drum rotates. This action allows for increased contact between the wet coal and the hot air, promoting efficient heat and mass transfer.

As the wet coal is lifted and dropped by the blades, it comes into direct contact with the hot air. This contact results in the evaporation of moisture from the coal, thus drying it. The evaporated moisture is carried away by the hot air, which continuously circulates within the dryer.

Once the coal is sufficiently dried, it is discharged from the drum through a star-shaped unloader. The dried coal is then conveyed to the packaging or storage area.

In summary, the working principle of a coal dryer machine involves the dispersion of wet coal, its entry into a rotating drum, the interaction between the wet coal and hot air inside the drum, and the subsequent discharge of the dried coal. This process efficiently removes moisture from the coal, making it suitable for various applications.

Structure of Coal Dryer

Structural Advantages of Coal Drying Machine

he coal drying machine offers several structural advantages that contribute to its efficiency and effectiveness in drying coal:

Minimization of drying costs: The cylinder ends of the machine are well sealed to minimize heat loss. This helps in reducing the expenditure on fuel since low-cost coal is used as the heat source. Additionally, the machine is fully automatic, reducing the manpower required for operation.

Maximum safe production: The machine is designed for full automation, ensuring safe and accident-free production processes.

High-quality finished product: The machine features a three-layer settlement structure that reduces dust pollution from the material. The high-temperature rapid drying process minimizes the loss of organic elements in the material. With online moisture inspection and fuzzy control, the water content of the material is consistent after the drying process.

High drying strength: The machine has a high water removal capacity, with a maximum output of up to 8000 kg per hour for continuous production.

High drying efficiency: The coal drying machine utilizes a high-temperature rapid drying process, significantly increasing the utilization of hot air temperature by 40% compared to conventional low-temperature drying methods. The machine’s heating system has a thermal efficiency of up to 90%, resulting in an overall thermal efficiency of 73%. Furthermore, a portion of the heated air is continuously circulated to maintain the temperature, reducing heat loss.

In summary, the structural advantages of the coal drying machine include cost minimization, maximum safe production, high-quality finished products, high drying strength, and high drying efficiency. These factors contribute to the overall efficiency and effectiveness of the machine in drying coal.

The coal dryer machine provides several environmental benefits and promotes the efficient utilization of coal resources:

Pollution and occupied area problems: The coal dryer helps solve the pollution and occupied area issues associated with coal slime in coal separating plants. By drying the coal slime, it reduces its volume and makes it easier to handle and store. This reduces the environmental impact of coal slime and minimizes the space required for its storage.

Reduced power generation cost: The dryer contributes to cost reduction in power generation for coal-fired power plants. By drying the coal before combustion, the moisture content is reduced, leading to improved combustion efficiency. This results in lower fuel consumption and reduced power generation costs.

Comprehensive coal utilization: The coal dryer promotes the comprehensive utilization of coal resources. By efficiently drying coal, it allows for a wider range of applications, such as power generation, industrial processes, and coal conversion technologies. This maximizes the value of coal resources while minimizing waste and environmental impact.

In summary, the environmental value of a coal dryer includes mitigation of pollution and occupied area problems related to coal slime, reduction of power generation costs for coal-fired power plants, and promotion of the comprehensive utilization of coal resources. These benefits improve the sustainability and environmental performance of coal-related industries.

Roatry Dryer Customer Site

Coal Dryer in Mongolia

General Specification

Spec./m (Dia.×Length)	Shell Cubage (m³)	Capacity (t/h)	Installation Obliquity (%)	Highest Inlet Air Temperature (℃)	Main Motor (kw)	Weight (t)
Φ1.2×8.0	9.0	1.9～2.4	3～5	700～800	7.5	9
Φ1.2×10	11.3	2.4～3.0	3～5	700～800	7.5	11
Φ1.5×12	21.2	4.5～5.7	3～5	700～800	15	18.5
Φ1.5×14	24.7	5.3～6.6	3～5	700～800	15	19.7
Φ1.5×15	26.5	5.7～7.1	3～5	700～800	15	20.5
Φ1.8×12	30.5	6.5～8.1	3～5	700～800	18.5	21.5
Φ1.8×14	35.6	7.6～9.5	3～5	700～800	18.5	23
Φ2.2×12	45.6	9.7～12.2	3～5	700～800	22	33.5
Φ2.2×14	53.2	11.4～14.2	3～5	700～800	22	36
Φ2.2×16	60.8	13.0～16.2	3～5	700～800	22	38
Φ2.4×14	63.3	13.5～16.9	3～5	700～800	37	45
Φ2.4×18	81.4	17.4～21.7	3～5	700～800	37	49
Φ2.4×20	90.4	19.3～24.1	3～5	700～800	45	54
Φ2.4×22	99.5	21.2～26.5	3～5	700～800	45	58
Φ2.6×24	127.4	27.2～34.0	3～5	700～800	55	73
Φ3.0×20	141.3	30.1～37.7	3～5	700～800	75	85
Φ3.0×25	176.6	37.7～47.1	3～5	700～800	75	95
Φ3.2×25	201	42.9～53.6	3～5	700～800	90	110
Φ3.6×28	285	60.8～76.0	3～5	700～800	160	135

Technical parameters of indirect heat dryer:

Shell  diameter ×shell  Length   Items	Inside  diameter  of outer  shell (mm)	Inside  diameter  of inner  shell (mm)	Shell  Length (m)	Shell  cubage (m³)	Shell  obliquity	Lifting  blade  form	Highest  inlet air  temperature (℃)	Dimensions (m)
Φ1.5×15m	1500	500	15	20.27	3-5%	Lifting form	850	16.2×2.7×2.7
Φ1.5×17m			17	22.97				18.2×2.7×2.7
Φ1.5×19m			19	25.68				20.0×2.9×2.9
Φ1.8×21m	1800	650	21	35.91	3-5%	Lifting form	850	22.5×2.7×2.7
Φ1.8×23m			23	39.33				24.5×2.9×2.9
Φ1.8×25m			25	42.75				26.5×2.9×2.9
Φ2.2×21m	2200	800	21	58.10	3-5%	Lifting form	850	—-
Φ2.2×23m			23	63.61
Φ2.2×25m			25	69.15

Please note that the specific details and performance of the coal dryer machine may vary depending on the technology and application. The data provided is subject to change without prior notice. For more accurate and up-to-date information, it is recommended to chat online with Zoneding engineers who can provide detailed insights into the machine’s performance and capabilities. They will be able to address specific questions and provide the most relevant information based on your specific requirements.