Kohletrockner

Coal drying demands precision, safety, and control – ensure your process delivers these without compromise.

Maintain precise temperature control to prevent overheating and preserve product quality.

Minimize dust generation with engineered airflow and containment for a cleaner operation.

Enhance safety with systems designed to manage the risks of combustible coal dust.

Vibrating Fluid Bed Dryers for Coal

Carrier’s thermal fluid bed dryers are typically used for coals with a larger size fraction, such as run-of-mine coal. Fluid bed units are available in sizes up to 8 ft. wide x 50 ft. long with capacities of up to 250 TPH in a single unit, depending on the thermal load.

Our coal dryers utilize vibration, which significantly assists in fluidizing sticky and wet coals and helps convey larger particles that may not fluidize well or tend to settle to the bottom of the coal dryer bed.

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Carrier-Wirbelschicht-Kohlentrockner-Typen

Carrier engineers consider each coal type and application process requiring special considerations and unique drying system features. For example, filter cake coals are very fine and typically hold a high volume of water. Therefore, a filter cake coal dryer must be able to handle high evaporative loads and high entrainment levels in the exhaust gases. Some coals, such as lignite, are subject to spontaneous combustion and explosions. A coal dryer for lignite should include explosion venting, a water deluge system, and possibly an inert gas or a re-circulated self-inerted process gas. Conversely, anthracite coal exhibits a high ignition temperature, rendering explosion vents or a deluge system in the coal dryer unnecessary.

Carrier coal dryers include:

Vibrierende Fließbetttrockner

Conventional (non-vibrating) Fluid Bed Dryers

Conventional (non-vibrating) Fluid Bed Dryers with in-bed Heat Exchangers

Conventional Flash or Tornesh Dryers

Anordnung der Kohletrocknungssysteme

Da die thermischen Kohletrocknersysteme von Carrier für jede Anwendung maßgeschneidert sind, kann eine unendliche Anzahl von Anordnungen und Komponentenkombinationen angeboten werden. Einige dieser Kohletrockner-Konfigurationen umfassen:

Kohletrocknersysteme, die nur trocknen.

Systeme, die trocknen und kühlen.

Kohletrockner, die die Abgase der Kühlzone in die Trocknungszone zurückführen, sorgen für eine bessere Effizienz.

Kohletrocknungssysteme mit geschlossenem Kreislauf werden mit einem direkt befeuerten Gaserhitzer beheizt.

Systeme mit im Kreislauf geführten Prozessgasströmen, die mit indirekter Wärme beheizt werden.

Systeme mit rezirkulierten, selbst eingebrachten Prozessgasströmen, die durch direkt befeuerte Prozessgaserhitzer erhitzt werden.

Systeme mit rezirkulierten, indirekt beheizten, inerten Prozessgasströmen, wie z. B. Stickstoff, mit Wärmetauschern im Bett.

Features & Benefits

Vibration promotes uniform fluidization and smooth conveying of wet, sticky coal, improving drying consistency.

Zoned temperature control allows gradual moisture removal, reducing the risk of overheating or coal degradation.

Gas recirculation systems recover and reuse heat, reducing fuel consumption and operating costs.

Closed-loop or inert gas systems enhance safety by limiting oxygen levels and reducing explosion risk.

High-velocity airflow in flash dryers enables rapid moisture removal for fine coal particles, increasing throughput.

Tornesh dryer design combines flash and fluid bed principles to handle a wide range of coal sizes with consistent results.

Adjustable retention time controls allow precise tuning of moisture levels across varying coal types.

Abrasion-resistant construction extends equipment life when processing harsh, high-wear coal materials.

Equipment Options & Accessories

Explosion Vents

Many coals are highly combustible. The experts at Carrier will guide and recommend the best explosion proofing vent for your application.

In-Bed Heat Exchanger

Immersed heat exchanger tubes can be added to the fluidized bed area for indirect heating and improved efficiency.

Access Manways & Sampling Ports

Access sampling ports for process drying monitoring.

Delta-Phase® Drive

For vibrating units, adjusts the vibration angle and retention time during operation.

Automated Control Systems

PLC-based automated control systems to manage airflow, temperature, and throughput.

Vibrating & Conventional (Static) Designs

Vibrating beds improve handling of sticky, wet, or wide-size coal distributions.

CIP (Clean-In-Place)

Spray nozzles for easier cleaning.

Multi-Zone Temperature Control

Delivers a staged process such as high heat to remove coal surface moisture followed by lower-temperature zones to prevent overdrying, degradation, or combustion of the coal. Cooling zones can also be added.

Integrated Systems

Carrier can provide coolers, feeders, screeners, coal conveyors, and emission control systems.

Anwendungen

Anthracite coal

Carrier’s coal dryers remove surface and inherent moisture from dense anthracite using controlled fluidization and thermal energy. Uniform air distribution provides consistent drying while maintaining particle integrity and heating value.

Coking or Metallurgical Grade Coal

Precisely controls moisture in metallurgical coal before coking operations. Uniform fluidization reduces moisture variability while limiting particle degradation and supporting consistent coke-oven feed characteristics.

Bituminous Coals

Provides efficient moisture removal from bituminous coal through controlled airflow, temperature, and residence time. Uniform bed conditions deliver consistent product moisture while supporting reliable downstream handling and combustion.

Beneficiation of PRB Coals

Reduces moisture in Powder River Basin coal to increase heating value and improve handling characteristics. Controlled thermal processing provides uniform drying while managing temperature-sensitive coal properties.

Beneficiation of Lignite Coals

Removes high inherent moisture from lignite to improve energy density and downstream process efficiency. Engineered airflow and residence time provide controlled drying while minimizing overheating and degradation.

Lignite Coals Prior to Gasification or Liquefaction

Our coal fluid bed dryers reduce lignite moisture before gasification or liquefaction to improve thermal efficiency and feed consistency. Controlled fluid-bed drying delivers predictable residual moisture for downstream conversion processes.

Run-of-Mine Coal

Handles variable particle sizes and moisture levels found in run-of-mine coal. Controlled fluidization provides consistent moisture reduction while preparing material for screening, beneficiation, storage, or downstream processing.

Filter Cake

Dries high-moisture coal filter cake using intensive air-to-particle heat and mass transfer. Engineered fluidization breaks up wet material and produces a more consistent, handleable downstream product.

Coal Fines from a Prep Plant

Removes residual moisture from fine coal recovered during preparation operations. Controlled airflow and bed conditions provide uniform drying while recovering usable coal for downstream handling or utilization.

Steam Coal

Reduces moisture in steam coal to improve heating value and combustion efficiency. Uniform fluid-bed drying provides consistent product conditions for conveying, storage, pulverizing, and boiler feed.

Reclaimed Waste Coal

Dries recovered coal from waste piles or impoundments to improve handling and energy value. Controlled processing accommodates variable moisture while preparing reclaimed material for beneficial reuse.

Washed & Sized Bituminous Coal

Our coal dryers remove residual surface moisture following washing and sizing operations. Controlled fluidization maintains particle-size integrity while producing consistent moisture levels for storage, transportation, or downstream use.

Broschüren

Solutions for Thermal Coal Drying & Beneficiation

Vibrating Fluid Bed Brochure

Conventional Fluid Bed Brochure

Tornesh & Flash Dryer Brochure

Carrier Capabilities Brochure

CPEG Capabilities Brochure

Galerie

Coal Dryers FAQs

Why is coal drying important in industrial processes?

Drying coal improves combustion efficiency, increases energy output, and reduces transportation weight by lowering the moisture content of the fuel.

What types of coal can be dried using industrial dryers?

Coal dryers can process lignite, sub-bituminous coal, bituminous coal, and other coal types depending on system design and moisture levels.

How does drying coal improve power plant performance?

Removing moisture allows coal to burn more efficiently, thereby improving boiler performance and reducing fuel consumption.

What challenges are involved in drying coal?

Coal drying requires careful temperature control, dust management, and safe handling because of the combustibility of coal dust.

Can coal dryers handle large production volumes?

Yes. Industrial coal drying systems are designed for continuous operation and can process large volumes of coal for power generation and industrial fuel applications.