Knock-out pots

Make sure vent system is sloped to drain to knock-out pot (separator)... 

The mechanical integrity focus of this section covers stationary existing chemical processing plant equipment and piping. Equipment includes storage tanks, pressure vessels, dryers, heat exchangers, reactors, incinerators, columns, filters, knock-out pots, and so forth. As previously stated, this section assumes the equipment is designed and fabricated to... 

Char knock out pot Limited particle collection. High fouling of packing with tar Removed... 

Heat exchangers (HHE CHE) Modern designs of CHE incorporate and knock out pot for collection of the carried over acid mist. Modem designs of... 

Compressor exit gas cool if temperature > 175 °C include oil knock out pots and filter if the compressor is oil-lubricated. Don t let lubricating oil/mist collect or remain for a long time in the hot discharge side of the compressor. Instead of one compressor on load and a second on standby, use two compressors with each handling 60 % of load. Reduce recycle in compressor operations. 

The superficial, density-weighted vapor velocity, k , is used to size the diameter of distillation columns, absorbers. Section 4. 8, gas-liquid separators or knock out pots, Section 5.1, and face velocity to demisters, Section 9.1. For convenience, values of k are given in Table 4.1 for different applications. 

Knock out pots 0.03 to 0.12 with the For horizontal vessels, higher values of k... 

Knock out pots "Poor separation" [foamtng] /insufficient residence time/feed and exit nozzles at wrong location/faulty design. 

The knock-out drums or separator tanks/pots can be designed using the techniques offered in the chapter on Mechanical Separation, and will not be repeated here. API-RP 521 [13] specifies 20-30 minutes holdup liquid capacity from relief devices plus a vapor space for dropout and a drain volume. 

Relief line headers, individual relief lines, blowdown lines and flare lines should be self-draining from all relief valve outlets to the knock-out drum, flare stack or a point at the plant limit. A pocketed relief line system is more expensive, because usually an extra condensate pot is required with instruments, valves and pumps. To eliminate... 

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