Coal-Fired Heating Rotary Dryer System

Coal-Fired Heating Rotary Dryer System

Release time:30 June 2023

A coal-fired heating rotary dryer is a standard industrial drying equipment mainly used for heat treatment and high-humidity drying materials.

The coal-fired rotary dryer working principle is to evaporate the moisture in the material and dry it through the thermal energy generated by burning coal.

The rotary dryer can dry coal, slag feed, biomass fuel, slag ore, river sand, and other high-humidity materials to promote recycling and comprehensive utilization. It is widely used in various industrial fields, such as the coal industry, metallurgy industry, building materials industry, etc., for drying and heat treatment of materials with high humidity, such as coal, ore, slag, chemical products, etc. It has the advantages of low fuel cost, stable heat output, strong adaptability, etc.

Coal-fired Dryer Features

As standard drying equipment, the coal-fired dryer has the following characteristics and advantages:

Low fuel cost: Coal is relatively cheap and widely available as the primary fuel. Compared with other fuels, such as natural gas or electricity, coal has a lower fuel cost, which can effectively reduce production costs.

Stable heat output: Coal combustion produces high heat energy, which can provide stable high-temperature hot air to ensure uniform and stable heat output during the drying process, which is conducive to improving drying efficiency and product quality.

Strong adaptability: coal-fired dryer is suitable for processing various materials, such as coal, ore, slag, chemical products, etc., and has a wide range of applications. It can meet the drying needs of different materials and has good adaptability.

Large processing capacity: Coal-fired dryers usually have a large processing capacity and can handle many materials. Mass production and industrial applications must be able to meet the demands of production lines.

Simple and reliable structure: The structure of the coal-fired dryer is relatively simple, and the operation and maintenance are relatively easy. The combustion and hot air systems are equipped with reasonable control devices, which can achieve stable operation and efficient heat transfer, ensuring the reliability and safety of the equipment.

Coal-Fired Heating Rotary Drying System

Each coal fired heating rotary drying systems is custom-built for each client. The drum dryer systems include the following components:

Coal-Fired Dryer Process

Coal-Fired Heating Rotary Dryer Process

1. Feeding

The feed chute or belt conveyor feeds the material to the dryer. And use a coal pulverizer to grind the coal and inject the coal into the pulverized coal burner.

Coal Pulverizer
Coal Pulverizer
Pulverized Coal Burner
Pulverized Coal Burner

2. Furnace body and combustion system

Coal-fired dryers usually have a furnace body and combustion system. The furnace body is a closed space for burning coal. The combustion system includes burners and combustion control devices, which regulate the combustion process of coal and control the flame temperature and heat output.

Burners and combustion chambers
Burners and combustion chambers

3. Drying chamber

The drying chamber is the main working area of the dryer and is used to accommodate the material to be processed. The material enters the drying chamber through the feed port, moves and turns continuously, conducts heat conduction and heat transfer with the hot air, and evaporates the water.

Rotary Dryer

4. Hot air system

The coal-fired dryer uses the heat energy generated by burning coal to send hot air into the drying chamber through the hot air system. The hot air system includes a generator, fan, and air duct. The heat energy generated by burning coal passes through the hot air generator to create hot air, and the fan sends the hot air into the drying chamber through the air duct.

5. Exhaust gas treatment system

During the coal combustion process, the flue and waste gas produced contains waste smoke and harmful gases, which must be treated to meet environmental emission requirements. Exhaust gas treatment systems usually include cyclone dust collectors, desulfurization, and denitrification devices to remove particulate matter, sulfur dioxide, and nitrogen oxides.

6. Control system

The control system monitors and controls the operating parameters of the coal-fired dryer, such as temperature, combustion state, air volume, etc. The stability and safety of the drying process are ensured through reasonable adjustment and control.

We design, manufacture, and install each rotary drying system to deliver the highest value and quality, and our service extends well beyond commissioning.

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