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Heat transfer effect and operation process of the dryer machine for textile
Dec 27, 2018

The dryer machine for textile can effectively indirectly heat or cool the paste, granule, powder and slurry materials during the operation, and can complete the unit operations such as drying, cooling, heating, sterilization, reaction, low-temperature calcination, etc. . The special wedge-type agitating heat transfer paddle in the equipment has high heat transfer efficiency and self-cleaning function of the heat transfer surface. A hollow hollow blade is densely arranged on the hollow shaft, and the heat medium or the cooling medium flows through the blade through the hollow shaft. The heat transfer area in the effective volume of the unit is large, and the temperature of the heat medium is from -40 ° C to 320 ° C. It can be water vapor or liquid type: such as hot water and heat transfer oil. The cooling medium can be cold water or chilled brine.

The indirect conduction heating of the dryer machine for textile does not carry air to remove heat, and the heat is used to heat the material. The heat loss is only the heat dissipation to the environment through the insulation of the body. The wedge-shaped blade heat transfer surface has a self-cleaning function. The relative movement of the material particles and the wedge surface produces a scrubbing action, which can wash away the adhering material on the wedge surface, so that a clean heat transfer surface is maintained during operation.

The housing of the paddle dryer is W-shaped, and two to four hollow agitating shafts are generally arranged in the housing. The housing has a sealed end cap and an upper cover to prevent material dust from leaking out and collecting material solvent vapor. A baffle is arranged at the discharge port to ensure the height of the material level, so that the heat transfer surface is fully covered by the material. The heat transfer medium passes through the rotary joint and flows through the casing jacket and the hollow agitating shaft. The hollow agitating shaft has different internal structures according to the type of the heat medium to ensure the heat transfer effect.

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