Drying method and drying device

Abstract

The present invention provides a drying method and a drying device. The drying method is for drying an article to be dried (W3) that contains moisture, in a drying device (1) which includes at least afluidizing chamber (12) and a mixing chamber (14). In the method, a pre-dried article (W1) obtained by pre-drying an article to be dried (W3) is supplied to the inside of the fluidizing chamber (12),and in that state, the article is fluidized into a fluidized pre-dried article (W2), and this fluidized pre-dried article (W2) is moved to the inside of the mixing chamber (14), which is separated from the fluidizing chamber (12) by a partition (13) and which communicates with the fluidizing chamber via a through-hole (13a) formed in the bottom of the partition (13). In this state, an article tobe dried (W3) is fed from above the through-hole (13a) to be mixed with the fluidized pre-dried article (W2).

Description

technical field

[0001] The invention relates to a drying method and a drying device. Background technique

[0002] Conventionally, a drying method for drying a material to be dried such as coal and sludge containing moisture has been studied.

[0003] When a high-moisture powdery object to be dried is dried in the drying chamber, the object may adhere to or remain in the drying chamber, thereby clogging the entrance of the drying chamber. Therefore, a method of suppressing the adhesion of the to-be-dried object is adopted by introducing a purge gas into the portion to which the to-be-dried object adheres.

[0004] However, in this method, it is necessary to introduce the purge gas to a plurality of places in the drying chamber, and there is a problem that the equipment cost and the running cost increase.

[0005] Therefore, in the drying method disclosed in Patent Document 1, after returning a part of the dried product (pre-dried product) obtained by drying lignite (dried ...

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