A combined wet material fluidized bed superheated steam drying system

Abstract

The invention discloses a combined type moist material fluidized bed superheated steam drying system. An existing drying system can not achieve reasonable distribution of energy. According to the combined type moist material fluidized bed superheated steam drying system, an inlet and an outlet of a sleeve type screw feeder are connected with a crusher and a pneumatic conveying bed respectively, the two ends of the pneumatic conveying bed are both communicated with a fluidized bed dryer, the upper end and the lower end of the fluidized bed dryer are provided with an adjusting guide tube and a discharging opening respectively, the two ends of a dust collector are connected with the adjusting guide tube and the sleeve type screw feeder respectively, a steam superheater is connected with the pneumatic conveying bed and the fluidized bed dryer through a fan, meanwhile, the two ends of a pipeline inside the fluidized bed dryer are connected with the steam superheater and the sleeve type screw feeder respectively, and a steam-water collector is arranged between an outer pipe of the spiral feeder and the steam superheater. The combined type moist material fluidized bed superheated steam drying system has selective drying time for materials with different grain sizes, the condensing heat of a fluidizing agent is fully used, and drying cost is lowered.

Description

technical field [0001] The invention relates to a combined wet material fluidized bed superheated steam drying system, which belongs to the field of drying devices. Background technique [0002] With the development of my country's industry, a large number of industrial raw materials need to be dehydrated, and the drying devices widely used at present include fluidized bed dryers, drum dryers, rotary dryers, spray dryers, etc. The fluidized bed dryer has the advantages of large heat transfer area, intense heat transfer and rapid drying. Because the heat transfer medium and the material are not in direct contact with the indirect dryer, the drying process is safe and reliable, and it is especially suitable for materials with low ignition points. [0003] The main problems of fluidized bed dryers widely used at present: [0004] 1. Due to the uneven size, water content and weight of the particles, small particles are easy to dry, but are easily blown by the wind, and large p...

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Problems solved by technology

[0004] 1. Due to the uneven size, water content and weight of the particles, small particles are easy to dry, but are easily blown by the wind, and large particles are heavy and difficult to dry. Different factors such as water content and drying speed cannot be taken into consideration in the drying process. , causing some particles to be too dry and some to be incompletely dried, failing to achieve a reasonable distribution of energy

[0005] 2. The drying medium of the traditional fluidized bed dryer needs to be cooled outside the system, which will waste the energy of medium condensation outside the system, which is a waste of energy for the system

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