Pressure vessel pneumatic conveying

Dried coal is pneumatically conveyed to feed bins, pressurized through lockhoppers, and fed to the refractory-lined fluidized-bed gasifier vessel by variable-speed screws. The gasifying agent, mixed oxygen and steam, is fed near the bottom of the gasifier. The bed operates at 2.5 MPa (25 bar) and... 

In this chapter we deal with two examples of the transport of particulate solids in the presence of a gas. The first example is pneumatic transport (sometimes referred to as pneumatic conveying), which is the use of a gas to transport a particulate solid through a pipeline. The second example is the standpipe, which has been used for many years, particularly in the oil industry, for transferring solids downwards from a vessel at low pressure to a vessel at a higher pressure. 

With this Turbuflow technology we are able to convey the fly ash under stable conditions even with an endspeed of 5.5 m/s. Using this endspeed with a conventional pipe the pipe system is blocked after a short time The weight of the pressure vessel is constant (no outflow ). The pressure of point PI increases to a max. value, the pressure at P2 and P3 is zero (no pneumatic transport). 

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