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Zoneding’s coal dryer is designed to handle high-humidity coal, suitable for various coal particles. It efficiently smashes and dries coal, making it a versatile source for power plants and industrial raw materials, with applications in construction, metallurgy, and mining.
Wet coal hurts efficiency and causes handling issues, costing you money. A coal dryer is the specialized equipment designed to remove this problematic moisture for better performance.
A coal dryer is industrial equipment designed to reduce moisture content in coal like lignite or slurry. It uses heat to evaporate excess water, producing dry coal that meets specific needs for heating value, transport, or processing.
This machine is essential in various industries dealing with coal that has too much water naturally or after washing processes.
The rotary coal dryer is mainly used for drying coal materials with high water content, fine particle size and high viscosity (slime, flotation tail coal, mixed coal, pressure filtration tail coal, final clean coal, medium coal, or concentrate powder). It can also be applied for drying building materials, mines, clay, sand, limestone, chemical industry, metallurgy, electric power and other industries.
Dealing with wet coal causes headaches. It performs poorly, clogs equipment, and costs more to move. A coal dryer directly tackles these issues, offering significant operational benefits.
Investing in a coal dryer solves problems like low heating value, poor combustion, handling difficulties (sticking, freezing), high transport costs, and failing to meet quality specifications for power plants or industrial users.
Wet coal presents several fundamental problems that drying technology aims to resolve. Removing excess moisture leads to tangible improvements across the board. Firstly, it significantly increases the calorific value (heating value) per unit weight, meaning you get more energy from the same amount of coal. This improves efficiency in boilers and furnaces. Secondly, dry coal handles much better. It is less prone to sticking in chutes and conveyors and eliminates issues with freezing in cold weather. Thirdly, better combustion characteristics result from lower moisture, leading to more stable boiler operation and potentially lower emissions of some pollutants. Fourthly, removing water weight drastically reduces transportation costs, especially over long distances. Finally, many end-users have strict moisture content specifications; drying ensures your product meets these requirements, avoiding penalties or rejection. Ultimately, drying adds value and improves the usability of the coal resource.
Rotary coal dryers tumble coal through a controlled stream of hot gas (direct or indirect heat) inside a rotating drum. Safety relies heavily on strict oxygen level control (using inert gas/flue gas), robust seals, temperature monitoring, and explosion protection systems.
The most common type, the rotary drum dryer, works similarly to those used for other minerals but with heightened safety protocols. Wet coal enters one end of a rotating, inclined cylinder. Lifters inside shower the coal through a stream of hot gas.
A complete system typically includes: Feed system (hopper, feeder), conveyors, the dryer unit, heat source (burner/furnace), ducting, robust dust collection (cyclone/baghouse), exhaust fan, discharge system, control panel, and essential safety systems (O2/CO monitors, inert gas).
A functional and safe coal drying plant involves several key pieces of equipment working in concert:
As ZONEDING, we design and supply these complete, integrated systems, ensuring all components work together safely and efficiently.
| 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 |
A coal dryer is specialized industrial equipment designed to reduce the moisture content of coal, particularly low-rank coals like lignite. Its primary function is to upgrade the fuel by increasing its heating value (BTU/calorific value). Upgrades fuel value.
Drying coal significantly boosts its energy output per ton, reduces transportation costs, and improves boiler efficiency as less energy is wasted evaporating water. It also minimizes handling issues like freezing and blockage. Boosts energy efficiency.
The most common coal dryer is the rotary dryer, valued for its high throughput and ability to handle abrasive materials. Fluidized bed dryers are also used for their high thermal efficiency with specific types of coal. Offers robust solutions.
Modern coal dryers are engineered with advanced safety features, including temperature and pressure monitoring, inert gas systems, and explosion-proof components to mitigate the risk of dust combustion and ensure safe operation. Prioritizes operational safety.
