Rotary dryers are a variant of industrial dryers that are used to reduce or eliminate moisture through direct exposure to heated gases. Rotary dryers are commonly used to process a variety of materials such as coal slime, dry metallic minerals, non-metallic minerals, and clay for industrial cement among others. These machines are popular as they have a wide range of applications and are relatively easy to operate.
The global rotary dryers market is expected to grow at a sluggish CAGR of ~ 2.6 per cent through the forecast period. The growth can be attributed to technological innovations, the increasing penetration of industry 4.0 and related technologies, which have incrementally boosted the scope of applications for these dryers.
Widespread End Use Applications Key to Sustained Growth
Rotary dryers are either operated either continually or in batches, and can work on the principle of direct or indirect drying. Drying is an essential procedure in a number of process based industries including construction, food and beverage, minerals, chemical, and pharmaceuticals among others. High efficiency in drying is necessary for maintaining required product quality standards.
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In addition, drying also provides end users with a number of advantages such as increasing the convenience of packaging, storage, and handling of the products. For instance drying of biomass increases the efficiency of steam production from boilers by up to 15 per cent.
With such increased demand from end use industries, the requirements for rotary dryers is expected to go up in the near future. The demand for high efficiency variants is expected to go up particularly in the pharmaceutical and food and beverage industries. This can be attributed to the strict regulations associated with these industries.
The rising expansion activities in these end use industries have resulted in a greater demand for rotary dryers for the foreseeable future.
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Prohibitory Costs and Rising Environment Consciousness Hampers Growth
Rotary dryers for large scale applications are very expensive pieces of machinery, and are normally used in extensive post processing procedures to cut out the emissions of thick fumes. In addition, maintenance for these machines can potentially be very cost prohibitive. These processes generate additional costs of dispensation, which raises the overall costs of operations.
In addition, conventional rotary dryers are also being restricted from adoption owing to growing environmental concerns, limiting use only to large scale applications. Smaller contractors are also being pushed to rent out rotary dryers instead of making new purchases for this region.
Further, the average lifespan of rotary dryers ranges between 15 to 20 years. As a result these machines have a fairly low rate of replacement, and the industry is highly reliant on new sales to maintain the growth rates. In addition, developments of fluidized bed dryers and spray dryers are increasingly competing with rotary dryers, which is expected to restrict industry growth for the foreseeable future.
End users continue to prefer rotary dryers with a capacity of more than 1 ton, which accounts for most of the revenue. However, recent years have witnessed a substantial increase in adoption for dryers between 300 kg to 1 ton, owing to the proliferation of small and medium scale enterprises.
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