Municipal sludge paddle dryer

product description

The pulp dryer can be used to dry, cool, heat, heat, sterilize, react, and cool, such as paste, granular, powdered and slurry. Special wedge-type mixing heat transfer pulp in the equipment has high heat transfer efficiency and heat transfer surface self-cleaning function.

working principle

Hollow shaft is packed with wedge-shaped hollow pulp leaves, the heat medium through the hollow shaft through the pulp. Unit effective volume within the heat transfer area is very large, heat medium temperature from -40 ℃ to 320 ℃, can be water vapor, it can be liquid type: such as hot water, heat transfer oil. Indirect conduction heating, no air to take away the heat, heat are used to heat the material. Heat loss is only through the body insulation layer to the environment heat. The wedge-shaped leaf heat transfer surface has a self-cleaning function. The relative movement of the material particles and the wedge surface produces a scrubbing effect, which can wash away the material attached to the wedge surface so that the clean heat transfer surface is maintained during operation. The shell of the paddle dryer is of the Ω type, and two to four hollow stirring shafts are generally arranged in the housing. The shell has a sealed end cap and an upper cover to prevent material dust from leaking and fully functioning.

The heat transfer medium passes through the housing jacket and the hollow stirring shaft through the rotary joint, and the hollow stirring shaft has different internal structure according to the type of the heat medium to ensure the best heat transfer effect.

Performance characteristics

◎ hollow pulp dryer low energy consumption: due to indirect heating, there is no large amount of air to take away the heat, the dryer wall and set the insulation layer, the slurry material, evaporation of 1kg of water only 1.2kg of water vapor.

◎ Pulp dryer system cost is low: the unit effective volume has a huge heat transfer surface, to shorten the processing time, equipment size becomes smaller. It greatly reduces the construction area and building space.

◎ wide range of materials: the use of different heat medium, both heat-sensitive materials can be processed, but also deal with the need for high-temperature treatment of materials. Commonly used media are: water vapor, heat transfer oil, hot water, cooling water and so on.

Can be continuous operation can also be intermittent operation, can be applied in many areas.

◎ small environmental pollution: do not use to carry air, dust material entrainment rarely. Material solvent evaporation is very small, easy to handle. For contaminated materials or the need to recover the solvent conditions, can be used

Closed loop.

◎ Low operating cost: structure. Wear a small amount of maintenance costs are very low. The following are the same as the "

◎ stable operation: Due to the special compression-swollen mixing effect of the wedge-shaped pulp, the material particles are fully contacted with the heat transfer surface. In the axial section, the temperature, humidity and the mixing gradient of the material are very small, The stability of the.