The activated carbon rotary kiln is a key piece of equipment used in the high-temperature carbonization and activation stages of activated carbon production. Through continuous mechanized operations, it converts carbon-containing raw materials such as coal and wood into highly adsorbent activated carbon products. Its core function is to achieve pyrolysis of the material under high-temperature conditions. It is widely used in environmental protection, chemical engineering, food processing, gold extraction, and other fields for water purification, decolorization, and purification, as well as waste gas treatment.

Activated carbon is a porous carbon material with an exceptionally high surface area and excellent adsorption capacity. Owing to its unique structure, it is widely used in water treatment, air purification, chemical industry, metallurgy, pharmaceuticals, food processing, and new energy sectors. With stricter environmental regulations and the global push toward carbon neutrality, the demand for activated carbon is rapidly increasing. As a result, high-efficiency and eco-friendly Activated Carbon Production Equipment has become the backbone of the industry.

Activated carbon production equipment refers to the complete set of machinery used for carbonization, activation, cooling, screening, and packaging. Together, they form an integrated activated carbon production line, enabling enterprises to achieve large-scale and continuous production.

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1. Main Components of Activated Carbon Production Equipment

A modern activated carbon production line generally consists of the following equipment categories:

1. Raw Material Pretreatment Equipment

• Crusher – crushes coconut shells, nutshells, coal, and wood into smaller pieces.
• Screening Machine – classifies raw materials according to particle size for uniformity.
• Dryer – removes excess moisture using hot-air dryers or rotary dryers.

2. Carbonization Equipment

• Carbonization Furnace
  • Includes batch carbonization furnaces, continuous furnaces, and rotary kilns.
  • Operates at 400–700°C under oxygen-limited conditions to remove volatiles and produce char.

3. Activation Equipment

• Rotary Kiln (Rotary Activation Furnace)
  • The most widely used activation equipment for continuous production.
  • Carbonized material is activated at 800–1000°C with steam or CO2, creating a developed pore structure.
• Vertical Activation Furnace
  • Compact design, high thermal efficiency, suitable for small- and medium-scale factories.
• Multi-stage or Fluidized Bed Activation Furnace
  • High activation efficiency, mainly used for powdered activated carbon production.

4. Cooling and Conveying Equipment

• Cooling Machine – quickly cools activated carbon from over 800°C to safe storage temperatures, preventing spontaneous combustion.
• Conveyors – belt conveyors or screw conveyors transfer material between processes.

5. Screening and Packaging Equipment

• Screening Machine – grades activated carbon into powder, granular, or pellet forms.
• Packaging Machine – automates the packing process, improving efficiency and reducing dust pollution.

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2. Working Principles of Activated Carbon Production Equipment

1. Carbonization Principle

Raw materials such as coconut shells, nutshells, sawdust, or coal are heated in a carbonization furnace at high temperature with minimal or no oxygen. This pyrolysis process removes volatile matter, producing a carbon-rich char.

2. Activation Principle

The carbonized product is transferred into an activation furnace within the activated carbon production equipment, where it reacts with steam or carbon dioxide:

• C + H2O → CO + H2
• C + CO2 → 2CO

These reactions etch the carbon surface, generating micropores and mesopores. The surface area of activated carbon increases dramatically (typically 800–1500 m²/g), resulting in high adsorption performance.

3. Cooling and Screening

• Hot activated carbon must be cooled rapidly to prevent combustion when exposed to air.
• The cooled product is then screened into different grades according to particle size.

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3. Advantages of Activated Carbon Production Equipment

1. Continuous and Large-Scale Production
   • Rotary kilns and continuous carbonization furnaces enable 24/7 operation and high capacity.
2. Energy Saving and Eco-Friendly
   • Waste heat recovery systems reduce fuel consumption by 15–20%.
   • Equipped with dust collectors and emission treatment systems.
3. Stable Product Quality
   • Automated control of temperature and gas atmosphere ensures consistent pore structure.
4. Raw Material Versatility
   • Can process coconut shells, palm shells, bamboo, sawdust, coal, and petroleum coke.
5. Automation and Intelligence
   • Advanced PLC systems provide remote monitoring and intelligent process control.

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4. Applications of Activated Carbon Production Equipment

1. Water Treatment
   • Drinking water purification
   • Industrial wastewater decolorization
   • Municipal sewage treatment
2. Air Purification
   • Industrial exhaust gas removal
   • Indoor air purification systems
   • Automotive emission control
3. Chemical and Metallurgical Industry
   • Catalyst support materials
   • Solvent recovery
   • Gas purification and desulfurization
4. Food and Pharmaceutical Industry
   • Pharmaceutical decolorization
   • Food processing filtration
   • Beverage and alcohol purification
5. New Energy and Energy Storage
   • Lithium battery anode materials
   • Supercapacitor electrode carbon
   • Hydrogen storage and methane adsorption

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5. Process Flow of Activated Carbon Production Equipment

1. Raw Material Preparation
   • Crushing, screening, and drying.
2. Carbonization
   • Raw materials are carbonized in furnaces under oxygen-limited conditions.
3. Activation
   • Carbonized char reacts with steam or CO2 at high temperatures to develop pores.
4. Cooling
   • Activated carbon is cooled to room temperature to ensure safety.
5. Screening and Packaging
   • Final products are graded into powdered, granular, or pellet forms, then packed.

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6. Classification of Activated Carbon Production Equipment

1. By Production Method
   • Batch equipment
   • Continuous equipment
2. By Equipment Function
   • Carbonization equipment
   • Activation equipment
   • Screening and packaging equipment
3. By Production Scale
   • Laboratory-scale small units
   • Industrial-scale full production lines