Hollow Blade Sludge Rotary Drum Paddle Dryer
Blade type drier is a low-speed stirring drier which is set up inside the equipment to make wet materials fully contact with heat carrier and hot surface under the agitation of the paddle, so as to achieve the purpose of drying. The structure form is generally horizontal, biaxial or four-axis. Oar blade dryer is divided into hot air type and conduction type. Hot air type is through the heat carrier (such as hot air) and the drying of the material in contact with each other.
The product can indirectly heat or cool paste, granular, powder, slurry materials, can complete drying, cooling, heating, sterilization, reaction, low temperature combustion and other unit operations. The special wedge type mixing heat transfer blade in the equipment has high heat transfer efficiency and self-cleaning function of heat transfer surface.
Hollow Blade Sludge Paddle Dryer has been successfully used in food, chemical, petrochemical, dyes, industrial sludge and other fields. The characteristics of heat transfer, cooling and stirring of the equipment make it possible to complete the following unit operations: combustion (low temperature), cooling, drying (solvent recovery) heating (melting), reaction and sterilization. The mixing blade is also a heat transfer surface, which increases the heat transfer area per unit effective volume and shortening the treatment time. The heat transfer surface of wedge blade has self - cleaning function. Compression - expansion and mixing function to make the material mix evenly. The material moves along the axial direction in a "piston flow". In the axial interval, the temperature, humidity and mixing degree of the material are very small.
The low temperature combustion can be completed by using the heat conducting oil as the hot medium slurry leaf dryer. For example: calcium sulfate dihydrate (Ca2SO4·2H2O) combustion into calcium sulfate hemihydrate (Ca2SO4·1/22H2O). Sodium bicarbonate (NaHCO3) is calcined into soda ash (Na2HCO3), etc. Through the cooling medium, such as water, cooling brine can be used for cooling. Such as: used in the soda soda industry of the blade type soda cooling machine, instead of the old air cooling soda cooling machine, save energy and tail gas treatment equipment, reduce the operating costs. The main function of the drying equipment, without the use of hot air, so that the solvent recovery, energy consumption, environmental control in an easy to handle the ideal state. It is especially suitable for solvent recovery, flammable, easily oxidized and heat-sensitive materials.
Has been widely used in fine chemical, petrochemical, dyestuff industry. The uniformity of temperature, humidity and mixing degree in the axial section enables the equipment to be used for heating or melting, or for some solid material reactions. It has been successfully used in compound fertilizer and modified starch industry. The pulp dryer can be used to sterilize food and flour. The large heating area in the unit effective volume can quickly heat the material to the sterilization temperature, avoiding the change of material quality caused by long-term heating.