Understanding the Principles of Paddle Dryer Working

Understanding the Principles of Paddle Dryer Working

Paddle dryer working principle is a complex process that involves various stages and components. A paddle dryer is an indirect contact dryer that is designed for slimy, sticky, wet cake materials and various product types and processes. This includes drying, heating, cooling, reacting, and more.

At AS Engineers, we design paddle dryers with a wide range of drying potentials, from fast, accelerated drying to gentle, prolonged drying. Paddle dryers are widely used in industries such as environmental pollution control, food & drugs, and chemicals. We also design a vacuum-based model for hyper-critical processes.

The paddle dryer working principle begins with the FD blower that pulls fresh air from the atmosphere via a filtration element, preventing impurities from entering. The ambient incoming air is pushed into the tube shell heat exchanger, which heats the air and brings it to the desired temperature via a heating medium. The used-up heating medium is then thrown out.

The heated air is pushed into the paddle dryer through an air inlet to prevent the condensation of vapor. The feed with high moisture content is dropped from the hopper into the Paddle Dryer. On the one hand, the moisture from the feed evaporates due to the heat transfer from the hollow shafts and the jacket. On the other hand, the hammers on the paddle break the feed down into smaller particles through churning and agitation. The feed’s breakdown process undergoes three phases: Plastic, Shearing, and Granular.

During the Plastic phase, the feed is subjected to deformation without any rupture, and during the Shearing phase, the feed experiences plastic deformation that causes rupture. The Granular phase involves the formation of granules with the help of the agglomerated feed. The used-up heating medium is then discharged from the outlet of the Paddle Dryer, where the dried feed gets collected and bagged.

The mixture of powder and air is then carried towards the cyclone separator via the ID fan’s suction, which gets separated and discharged through the rotary air-lock valve. A scrubber installed below continuously sprays processed water onto the mixture inside the Venturi’s throat and settles in the scrubber tank. Fresh air is then discharged from the chimney out into the atmosphere.

The working principle of the paddle dryer involves various components such as the FD blower, filtration element, tube shell heat exchanger, air inlet, hammers, hollow shafts, jacket, cyclone separator, ID fan, rotary air-lock valve, scrubber, and chimney.

The FD blower is responsible for pulling fresh air from the atmosphere, and the filtration element ensures that no impurities enter the system. The tube shell heat exchanger heats the air to the desired temperature with the help of a heating medium, which is then thrown out. The heated air is pushed into the paddle dryer through the air inlet to prevent the condensation of vapour.

The hammers on the paddle break the feed down into smaller particles through churning and agitation, and the moisture from the feed evaporates due to the heat transfer from the hollow shafts and the jacket. The used-up heating medium is discharged from the outlet of the paddle dryer, where the dried feed gets collected and bagged.

The mixture of powder and air is then carried towards the cyclone separator via the ID fan’s suction, which gets separated and discharged through the rotary air-lock valve. The scrubber installed below continuously sprays processed water onto the mixture inside the Venturi’s throat and settles in the scrubber tank. Fresh air is then discharged from the chimney out into the atmosphere.

The paddle dryer working principle is designed to ensure the efficient and uniform drying of the feed material. The three phases of the feed’s breakdown process ensure that the feed material is uniformly processed and results in granular particles.

Paddle dryers are an excellent solution for processes requiring efficient and uniform drying of feed materials. The different types of paddle dryers offer a wide range of drying potentials to meet different process requirements.

In conclusion, the working principle of the paddle dryer involves various stages and components that work together to achieve efficient and effective drying. Paddle dryers are widely used in various industries and are designed to handle slimy, sticky, and wet cake materials. AS Engineers is a leading provider of paddle dryers and offers a wide range of models to meet different process requirements.

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