Regional features analysis of plugged holes of dense phase gas-solid separation fluidized bed

• Autorzy: Zhang B. , Zhao Y. , Luo Z. , Song S. , Duan C. , Dong L.

Identyfikatory

DOI

10.5277/ppmp140220

• Języki publikacji: EN

Abstrakty

EN

In contrast to traditional coal separation, dry separation does not require water and does not cause water pollution. Dense phase gas–solid fluidized beds are used for dry separation. The plugged holes in the air distributor should be tested to ensure the stability of these beds for particle separation. The pressure fluctuation is sensitive to these plugged holes. This sensitivity can be tested and diagnosed by determining the standard deviation of the pressure fluctuation. In areas with partial blockage, that is the areas with weak fluidization, a decrease in the volume fraction of the particles and in the pressure differences in the transverse of the bed results in an increase of the standard deviation of the pressure fluctuation, thereby stimulating the lateral mixing of medium-sized particles. The standard deviation and the mixing intensity decrease axially. The value of sensitivity of the plugged holes in the air distributor decreases as the height of the bed increases. The features of air distributors affect the surrounding areas. The distribution law determining the influence of plugged holes on the beds is symmetrical. As the blockage of the fluidized bed distributor region increases, the mean square error of the pressure fluctuation in the related regions increases. The intensity of the effect is proportional to the distance to the plugged holes.

Słowa kluczowe

EN

gas-solid fluidized bed for separation; pressure fluctuation; plugged holes regions; features analysis; plugged holes sensitivity

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Physicochemical Problems of Mineral Processing
• Rocznik: 2014
• Tom: Vol. 50, iss. 2
• Strony: 667--679
• Opis fizyczny: Bibliogr. 32 poz., rys., tab.

Twórcy

autor

Zhang B.

• School of Chemical Engineering and Technology, China University of Mining and Technology, 221116, Xuzhou, China

autor

Zhao Y.

• School of Chemical Engineering and Technology, China University of Mining and Technology, 221116, Xuzhou, China,

autor

Luo Z.

• School of Chemical Engineering and Technology, China University of Mining and Technology, 221116, Xuzhou, China

autor

Song S.

• School of Chemical Engineering and Technology, China University of Mining and Technology, 221116, Xuzhou, China

autor

Duan C.

• School of Chemical Engineering and Technology, China University of Mining and Technology, 221116, Xuzhou, China

autor

Dong L.

• School of Chemical Engineering and Technology, China University of Mining and Technology, 221116, Xuzhou, China

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