Static discharge

Transitional Bmsh (author s term for energetic non-PBD discharge from nonconductive layer) s 10-100 mJ 

Bulking Bmsh (also known as cone discharge ) s 20 mJ 

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Before installation it is possible to estimate the total discharge head from the static discharge nead and the discharge friction head hj as follows ... 

Static Discharge Head The static discharge head is the vertical distance measured from the free surface of the hquid in the receiver to the pump centerhne, plus the absolute pressure at the hquid surface. Total static head hf, is the difference between discharge and suction static heads. 

Use conductive liner to reduce potential for degradation due to static discharge... 

The practical content of this book is mostly contained in Chapter 5 (gases and liquids) and Chapter 6 (powders and hybrid mixtures) with other chapters providing supporting material. Chapter 2 contains a brief explanation of the nature of static electricity followed by a detailed discussion of the characteristics and effective energies of different static discharges. Since this... 

A static discharge must coincide in time and space with a flammable atmosphere. 

The effective energy of the static discharge must exceed the ignition energy of the local mixture. 

What type of static discharge might occur ... 

An AC corona discharge in the throat leads to a cloud of charged droplets whose large momentum allows very long travel distances. Multiple devices for eliminating static discharges in powder silos have been tested [41] but the tests did not address typical flow rates for large capacity, dense phase pneumatic transfer operations. 

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