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andorra KJG-M type closed cycle prize leaf dryer

The closed cycle paddle dryer uses inert gas to circulate during the drying process to prevent combustion and explosion during the drying process. The whole drying process is dried in a closed environment under the protection of nitrogen, which has the characteristics of no dust and high safety.

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andorraClosed circuit dryer series

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Product Description

Overview

Working principle

The blade dryer uses steam, hot water or heat transfer oil as the heating medium. The shaft end is equipped with a rotary joint for introducing and exporting the heat medium. The heating medium is divided into two paths, which respectively enter the jacket of the dryer shell and the inner cavity of the blade shaft to heat the body and the blade shaft at the same time, and heat and dry the wet materials by conduction heating. The dried wet materials are continuously fed into the feeding port of the dryer quantitatively by the screw feeder. The wet materials enter behind the dryer, and the sludge is turned and stirred through the rotation of the blade, and the heating interface is continuously updated to contact with the body and blade, it is sufficiently heated to evaporate the surface water contained in the sludge. At the same time, the wet material is transported to the direction of the discharge port along with the rotation of the blade shaft into a spiral trajectory, and continues to stir during the transportation, so that the water exuded from the wet material continues to evaporate, and the qualified product with uniform drying is discharged from the discharge port.

Closed cycle paddle dryer in the drying process, such as the material of the wet component for the solvent, it can be recovered. The solvent evaporated during drying is removed by a cyclone separator, and the solvent is condensed by a condenser and discharged, and the exhaust gas still enters the dryer for circulation. The circulating gas shall be inert to prevent combustion and explosion during the drying process. The whole drying process is dried in a closed environment under the protection of nitrogen, and the discharge is carried out in a closed environment, which has the characteristics of no dust and high safety.

Equipment Features

The equipment has a compact structure, a large heat transfer surface per unit volume of the equipment, and a small footprint.

The heat utilization rate is high, the paddle type sludge dryer adopts conduction heating method for heating, no hot air takes away heat, and the heat utilization rate can reach more than 90%.

The wedge-shaped blade has self-cleaning ability, which compresses and expands the material during rotation, and enhances the heat transfer effect.

The gas flow rate in the dryer is low, the dust carried by the gas is less, the gas dust of the drying system is convenient to recover, the scale of the tail gas treatment device can be reduced, and the equipment investment can be saved.

The closed drying system is preheated by the circulating fan and the reheating mechanism until the exhaust temperature exceeds 100 ℃; the exhaust volume of the system is reduced by increasing the moisture content of the exhaust gas, and the rapid treatment of materials and the recovery of exhaust heat are realized. The structure is simple, Energy saving and environmental protection.

Because the closed drying system is eventually replaced by an inert oxygen-free superheated steam atmosphere, the atmosphere does not exist combustion and oxidation reaction, environmental protection and emission-free leaf dryer is especially suitable for flammable and explosive products in the air drying system.

optimization design

★Improved Design of Internal Cold Condensate Drainage System for Blade Shaft

According to the characteristics of large amount of dehydration of wet materials, the condensate drainage system inside the blade shaft is improved, and a device is added inside the blade to increase the drainage time during the rotation of the blade; the condensate drainage pipe is increased, thereby increasing the condensate drainage. The structure of the original siphon is improved to make the condensate discharge more thorough, thereby increasing the output.

★Changes to the external structure of the paddle

Some wet materials have high viscosity and poor fluidity. In order to make such materials flow forward, the equipment as a whole has a certain inclination angle towards the discharge port when the ordinary blade dryer is installed. However, when the equipment is placed obliquely, the flow speed of the materials cannot be well controlled, which makes it difficult to control the drying moisture of the materials. In order to improve the internal fluidity of the wet materials in the blade dryer, the external structure of the blade is changed to make the blade push forward. Changing the rotational speed of the blade shaft can control the advancing speed of the material, so that the material has a reasonable advancing speed, and the material has a reasonable material level inside the equipment, so that the material can fully contact with the blade surface and further improve the heat transfer area.

★Add some devices inside the cylinder

When the water content is about 60%, the material is easy to agglomerate, the surface is hard and difficult to break, but the inside is still in the form of filter cake, which brings great difficulties to the further drying of similar materials. On the other hand, in the process of drying similar materials, the material is easy to hold the shaft, thus moving the heat dissipation bread of the shaft and the leaf together when rotating, thus the drying effect is relatively poor. In order to overcome this difficulty, we have improved the dryer, adding some devices inside the cylinder, so that the caked material is easy to break, so that the drying speed is greatly improved.

★Reduce system exhaust emissions

Paddle dryer is a typical conduction dryer, its heat transfer and evaporation is achieved by hot wall rather than by gas convection, the role of the tail gas is to dry the solvent vapor produced in a timely manner away from the dryer. The closed drying system is preheated by the circulating fan and the reheating mechanism until the exhaust temperature exceeds 100 ℃; the system exhaust volume is reduced by increasing the moisture content of the exhaust gas, and the rapid treatment of materials and the recovery of exhaust heat are realized. The structure is simple, Energy saving and environmental protection.

★Under the protection of ammonia, this equipment is especially suitable for flammable and explosive products in the air drying system. The closed-cycle paddle dryer is of a fully enclosed structure. Inert gas (such as ammonia) is filled inside the equipment. When anaerobic materials or materials containing flammable and explosive solvents are dried, there is no oxygen in the gas, which cannot be burned or oxidized, thus effectively avoiding fire or explosion accidents during production, it is safer than ordinary equipment.

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