Pipe and bend erosion by pneumatic transport of solids at high temperature: Final report

Technical Report · Thu Jun 01 04:00:00 EDT 1989

DOI:https://doi.org/10.2172/5930895· OSTI ID:5930895

Klinzing, G. E.; Borzone, L. A.; Yang, Wen-Ching

The erosion of various components of a pneumatic transport line has been studied through basic experiments, commercial-scale test runs and computer simulation. The main objective was to study the effect of the operating variables on the erosion rates of refractory lined straight sections and bends. Temperatures ranging from 22 to 830/degree/C, gas velocities from 12.9 to 34 m/s and solid flow rates from 48 to 225 kg/h were tested in a High Temperature Pneumatic Transport Test Facility. Four kinds of refractory concretes were used as targets. The erodent materials were river sand, coal slag and alumina. The effect of gas velocity and solids slow rate on the erosion rate was correlated in terms of power laws, while temperature effects proved to be more complex, since mechanical properties of both erodent and target materials change with temperature. The erosion of circular bends was evaluated using a computer model that combines computational particle dynamics and experimental data to predict the erosion pattern inside the bend. Experiments on the erosion of wedge samples, performed in the erosion test facility, and data on particle-wall collisions, obtained with the help of high-speed photographic techniques, were the basic set of data used in the simulation. As an alternative to circular radius bends, and experimental study of wear and flow patterns in blinded T-bends was performed. The internal geometry in this kind of bends was determined by the solids deposition, and complex erosion patterns appeared as the operating variables were manipulated. 81 figs., 50 tabs.

• Research Organization: Pittsburgh Univ., PA (USA). Dept. of Chemical and Petroleum Engineering; Westinghouse Electric Corp., Pittsburgh, PA (USA). Research and Development Center
• DOE Contract Number: FG22-85PC80524
• OSTI ID: 5930895
• Report Number(s): DOE/PC/80524-T15; ON: DE89015741
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
013000* -- Coal
Lignite
& Peat-- Transport
Handling
& Storage
36 MATERIALS SCIENCE
360604 -- Materials-- Corrosion
Erosion
& Degradation
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
BUILDING MATERIALS
CARBONACEOUS MATERIALS
CEMENTS
CHALCOGENIDES
COAL
COMPUTERIZED SIMULATION
CONCRETES
CRYSTAL STRUCTURE
DOCUMENT TYPES
ENERGY SOURCES
EROSION
FLOW RATE
FLUID FLOW
FOSSIL FUELS
FUELS
JOINTS
LINERS
MATERIALS
MATHEMATICAL MODELS
MICROSTRUCTURE
OXIDES
OXYGEN COMPOUNDS
PIPE JOINTS
PIPES
PNEUMATIC TRANSPORT
PROGRESS REPORT
SAND
SIMULATION
SLAGS
SOLIDS
SOLIDS FLOW
TEMPERATURE EFFECTS
TRANSPORT
WEAR