Journal ArticleDOI
Effect of Operating Conditions and Powder Properties on Pneumatic Conveying Characteristics of a Top Discharge Blow Tank
TLDR
In this article, the effects of fluidizing and pressurizing gas flow rates on pneumatic conveying characteristics such as powder mass flow rate, solid-gas ratio, and voidage were evaluated.Abstract:
The effects of fluidizing and pressurizing gas flow rates on pneumatic conveying characteristics such as powder mass flow rate, solid-gas ratio, and voidage in a top discharge blow tank pneumatic conveying system are evaluated. Pulverized coal and glass beads were used to investigate the effect of powder properties on conveying performance. The results indicate that as the fluidizing gas flow rate increases, the powder mass flow rate and the solid-gas ratio increase at first and then decline. As the pressurizing gas flow rate increases, the powder mass flow rate increases gradually, while the solid-gas ratio increases at first and then declines. Since the voidage values of all experiments are below 0.95, it can be inferred that the top discharge blow tank pneumatic conveying system is able to achieve dense-phase conveying.read more
Citations
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Journal ArticleDOI
Influence of carbonaceous powders on flow characteristics of dense-phase pneumatic conveying at high pressure
TL;DR: In this paper, the effects of powder categories and particle sizes on shear properties, discharge behaviors of feeding hopper and conveying characteristics are investigated using a shear tester and a conveying facility with pressure up to 4.0 MPa.
Journal ArticleDOI
Conveying Characteristics of Pulverized Coal in a Top‐Discharge Blow Tank System
TL;DR: Based on the experiments of pulverized coal pneumatic conveying using nitrogen as carrier, the influences of riser inlet height above the gas distribution plate, riser diameter, and supplemental gas flow rate on the conveying characteristics were investigated in a laboratory-scale experimental setup of a top-discharge blow tank under atmospheric pressure as discussed by the authors.
Journal ArticleDOI
Pilot-Scale Experimental Study on Phase Diagrams of Pressurized Pneumatic Conveying with Pulverized Coal
TL;DR: In this paper, the authors investigated phase diagrams of PNE conveying with pulverized coal in a pilot-scale setup, with three types of the most widely used coal in China selected as the conveyed materials.
Journal ArticleDOI
Effect of Operating Conditions on Discharge Characteristics of Petroleum Coke Powder from a Top-Discharge Blow Tank at High Pressure
TL;DR: In this article, the effects of operating conditions (including fluidizing gas flow rate, blow tank pressure, differential pressure between blow tank and receiving tank, supplementary gas flow ratio) on solid discharge rate and solid loading ratio were investigated.
References
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Journal ArticleDOI
Types of gas fluidization
TL;DR: The behavior of solids fluidized by gases falls into four clearly recognizable groups, characterized by density difference (ϱs −ϱf) and mean particle size as discussed by the authors, and a numerical criterion which distinguishes between groups A and B has been devised and agrees well with published data.
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Overview: Pneumatic transport of solids
TL;DR: In this article, the most significant advantages, disadvantages and pitfalls of pneumatic conveying technology are summarized, and a discussion of the development of prediction procedures for pressure drop and state of flow is used to show the development in the technology itself.
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Air-impeded discharge of fine particles from a hopper
TL;DR: In this article, the discharge rate of a fine powder from a hopper is found to be less than that predicted by the Beverloo correlation, and evidence is presented to show that this is due to pressure gradients set up within the interstitial gas.
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Flowability parameters for chopped switchgrass, wheat straw and corn stover
TL;DR: A direct shear cell to measure the shear strength and flow properties of chopped switchgrass, wheat straw, and corn stover was designed, fabricated, and tested as discussed by the authors, and the measured angle of internal friction and cohesive strength indicated that chopped biomass cannot be handled by gravity alone.
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Characterisation of the flowability of glass beads by bulk densities ratio
TL;DR: In this article, the flowability of spherical glass beads having mean particle size (dp) ranging 20-170μm were studied and their aerated and tapped bulk densities, angle of slide ( σ s ), and angle of repose ( β ) were measured.