Rotary dryer

Rotary dryer

Rotary Dryer is also called Single drum Dryer or Single Cylinder Dryer, which is a kind of directly heated continuous rotating cylinder drying equipment, its working principle is to use thermal energy to heat and evaporate the moisture in the material, so that the material is dried.
Application fields:
Metallurgy, building materials, light industry, chemical industry
Applicable materials:
Drying limestone, sand, coal, slag, clay, wood chips, sawdust, mineral powder, etc.
Gradient: 1-3°
Rotational speed: 1.5-8 r/min
Intake temperature: ≤700℃
Power: 3-90 Kw
Productive capacity: 0.5-100 t/h
Weight: 2.9-75 t

Description

Rotary Dryer is a kind of drying equipment that deals with a large number of materials. It is widely used in metallurgy, building materials, food, chemical industry, light industry, coal and medical mining industry because of its reliable operation, flexible operation, strong adaptability and large processing capacity. Rotary dryer is generally suitable for granular materials, and can also be used for drying sticky paste or materials with high water content by partially incorporating materials. The advantages of rotary dryer are large production capacity, wide application range, small flow resistance, large fluctuation range allowed in operation, convenient operation, etc. Commonly used in dryer sand, mineral powder, sludge, chicken manure, cow manure and so on.
Rotary dryer

Features

Fully automated production, high throughput

The lifting device is welded inside the Rotary Dryer, and the material moves slowly under the rotating action of the cylinder, and automatically moves from the feed end to the discharge end. The cylinder body capacity is large, can handle a large number of materials at one time. The centralized control system can realize the intermediate monitoring and management and reduce the labor cost

Wide material adaptability

Rotary Dryer can handle a variety of materials, including dry and wet materials, the cylinder is made of corrosion-resistant wear-resistant material, and stainless steel can also be used according to demand to meet the needs of different industries, different humidity at one time drying.

Solid and reliable structure, low failure rate

Rotary Dryer adopts pin replaceable gear instead of traditional cast steel gear, saving cost investment, greatly reducing maintenance costs and time, the overall design is simple and reliable.

High suitability of heat source

Rotary dryer can use a variety of heat sources, including coal, steam, natural gas, biomass particles, heavy oil and other fuels to meet the different needs of users.

Working Principle

Rotary dryer
1. Rotation of the drum and movement of materials The core of the Rotary dryer is a rotating drum placed at an angle (usually at an angle of 1-3°), which is driven by a motor to drive the gear and gear ring system to achieve slow rotation. After the material enters the drum through the feeding device, it gradually moves from the high end to the low end under the dual influence of gravity and drum rotation. During this process, the lifting plate (or copying plate) inside the drum continuously lifts and scatters the material to form a uniform material curtain, thereby increasing the contact area between the material and the hot air. 2. Heat exchange process The heat source (such as a hot air blower or a combustion device) generates high-temperature gas (usually 700-800℃), which enters the drum through the air inlet pipe and flows in the opposite or forward direction of the material814. The design of the lifting plate (such as a multi-angle combination or LX-type structure) allows the material to be repeatedly dispersed and turned in the drum, ensuring that the hot air can penetrate the material layer and accelerate the evaporation of water. At the same time, an insulation layer is provided inside the drum to reduce heat loss and improve thermal efficiency. 3. Drying stage and dehumidification The movement of materials in the cylinder is divided into three stages: Preheating zone: the material initially absorbs heat and the surface moisture begins to evaporate; Main drying zone: high temperature zone, the moisture inside the material is quickly removed through heat conduction and convection; Cooling zone: close to the discharge port, the dried material and the residual hot air undergo final heat exchange to reach the specified humidity. The dried exhaust gas is discharged through the induced draft fan and dust removal device to ensure a clean operating environment. 4. Key technologies and structural optimization Transmission system: frequency conversion speed regulation technology is used to achieve precise speed control to meet the needs of different materials; Support device: the support wheel and the resisting wheel structure reduce friction loss, and the rolling bearing design simplifies maintenance; Seal design: heat-resistant steel flake seals replace traditional labyrinth seals to improve sealing performance and service life. 5. Scope of application and advantages The Rotary Dryer is suitable for drying a variety of materials such as coal, slag, chemical raw materials, etc. Its advantages include: High-efficiency heat exchange: the lifting plate combination improves heat utilization and shortens drying time; Large production capacity: the daily output of equipment of different specifications can reach several tons to tens of tons; Energy saving and environmental protection: the insulation layer and sealing system reduce energy consumption, and the matching dust removal device reduces pollution.

Techspecs

Main Technical Parameters

ModelGradient (%)Rotate Speed (r/min)Air Inlet Temperature (℃)Power (kw)Capacity (t/h)Weight (t)Remarks
WSH-6001-33-8≤70030.5-1.52.9Capacity is related to the thermal process
WSH-8001-33-8≤70040.8-2.53.5
WSH-10001-33-8≤7005.52.0-4.55.6
WSH-12001-33-8≤7007.54-814
WSH-15001-32-6≤800155-1517.8
WSH-18001-32-6≤80018.510-2022
WSH-20001-31.5-6≤8002212-3028
WSH-22001-31.5-6≤8003015-3536
WSH-24001-31.5-5≤8003720-5052
WSH-30001-31.5-5≤8007525-7565
WSH-32001-31.5-5≤8009025-9075

Application & Case

Chemical Industry

Catalyst Drying: Industrial Rotary Dryers can be used to precisely dry catalysts, remove moisture and impurities, ensure catalyst performance, and improve the efficiency and selectivity of chemical reactions.

Fertilizer Production: In the process of fertilizer manufacturing, such as urea and compound fertilizer, raw materials or semi-finished products need to be dried. For example, in urea production, the urea solution is evaporated and concentrated, and then further dried by a Rotary Dryer to form a granular urea product for easy storage and transportation.

Building Materials Industry

Gypsum Board Production: In the production process of gypsum board, the gypsum slurry needs to be dried and formed. Industrial Rotary Dryers can quickly remove moisture from gypsum slurry, so that the gypsum board meets the specified moisture content and strength requirements, and improve the production efficiency and quality of gypsum board.

Ceramic Raw Material Drying: Rotary Dryers can dry ceramic raw materials to a suitable humidity, which is convenient for subsequent blank making, molding and firing processes, and helps to improve the quality of ceramic products and reduce defects such as cracking during firing.

Mining industry

Coal drying: Industrial Rotary Dryers can dry coal, reduce the moisture content of coal, increase the calorific value of coal, make it easier to transport and sell, and also reduce the risk of spontaneous combustion of coal during storage.

Non-metallic mineral drying: Rotary Dryers can meet the drying needs of non-metallic minerals such as graphite, kaolin, bentonite, etc., and improve the quality and added value of products.

Papermaking industry

Pulp drying: Industrial Rotary Dryers can efficiently dry pulp to achieve the appropriate dryness to increase the dryness of pulp, facilitate subsequent papermaking and provide papermaking machines with stable quality pulp.

Paper drying: After papermaking, paper still contains a high amount of moisture and needs further drying to meet the quality requirements of finished paper. Rotary Dryers can dry paper evenly and quickly, improve the strength, flatness and glossiness of paper, and improve the physical properties and appearance quality of paper.

Metallurgical industry

Metal powder drying: Industrial Rotary Dryers can remove moisture and volatile impurities from metal powders such as iron powder and copper powder, prevent metal powder oxidation and agglomeration, improve the quality of metal powder, and meet the requirements of processes such as powder metallurgy.

Metallurgical waste slag treatment: Drying metallurgical waste slag with a Rotary Dryer can reduce the water content of the waste slag, facilitate subsequent waste slag treatment and resource recycling, and reduce pollution to the environment.

Environmental protection industry

Sludge drying: Industrial Rotary Dryers can dry sludge, reduce the water content of sludge to a certain extent, reduce the volume and weight of sludge, and facilitate subsequent sludge landfill, incineration or resource utilization.

Refuse-derived fuel (RDF) drying: Industrial Rotary Dryers can be used to dry refuse-derived fuel, improve its calorific value and combustion efficiency, make it more suitable for use as fuel, and achieve waste reduction and resource utilization.

FAQ

Yes, we provide a full set of equipment installation guidance, you can according to our design drawings for the production site construction and machine installation, we can also send engineers to the production site to guide the installation and train workers to operate.
Our quotation includes the main machine, supporting motors and feeding and discharging devices. If you need a supporting heat source and production line, we can provide production line design and supporting equipment, depending on your needs.
Common faults include motor failure, which may be caused by power failure, motor damage or control circuit failure. The power supply, motor and circuit need to be checked and repaired or replaced accordingly. In addition, poor drying effect may be caused by improper temperature control, poor ventilation or excessive material feed. The temperature needs to be adjusted, the ventilation duct needs to be cleaned or the feed amount needs to be adjusted. In addition, excessive vibration may be caused by unstable equipment installation, uneven drum wear, etc., which requires re-adjustment or replacement of the drum.
We select the model according to your production site and needs, and decide whether to transport the whole machine or split it according to the model. Generally, land transportation or sea transportation is adopted. The specific freight will be provided in the final quotation.

Customize large scale mining equipment with affordable cost

STCrushers provides high quality and reliable mining equipment customize manufacturing service for global customers, we design the production line according to the needs of the customer's processed materials and output, and realize fully automatic production from feed to discharge.

20 years of experience


We have more than 20 years of experience in the production of large mining equipment.


Professional production and R&D team

We have an experienced production line design team to meet the processing needs of different materials.

Advanced production facilities

We have two large workshops, a variety of processing equipment and machine tools.


Competitive prices


The company strives to provide customers with preferential prices and payment methods to meet customer needs.

Send an Inquiry

If you are looking for mining equipment such as stone crushers, ball mills, rotary dryer, rotary kiln and other equipment, feel free to contact us and our team will reply within 48 hours.

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Gongyi City, Henan Province, China

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