AIChE Equipment Testing Procedure - Trayed and Packed by American Institute of Chemical Engineers (AIChE) PDF

By American Institute of Chemical Engineers (AIChE)

ISBN-10: 1118627717

ISBN-13: 9781118627716

This re-creation of a relied on advisor combines and updates the easiest on hand box wisdom on either trayed and packed distillation columns. in a single whole, straight forward quantity, it offers a compilation of concepts instead of a unmarried set of obligatory steps, permitting readers to pick the approach that most closely fits their wishes. With its engineer-tested methods and unique factors, the 3rd version presents chemical engineers, plant managers, and different pros with first class recommendation on assessing and measuring functionality for a number of distillation column varieties in a number of functions.

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Extra info for AIChE Equipment Testing Procedure - Trayed and Packed Columns: A Guide to Performance Evaluation

Example text

It is also important to prepare the testers for the method of data assembly and documentation required. All too often a great performance test is rendered useless because a protocol for proper documentation of the results was not established [21]. Another critical step is to have all instrument loops calibrated before the test begins. This will ensure that accurate data is collected when the test is conducted. 0 Test Procedure for Maximum Hydraulic Throughput Many distillation columns will need to be operated at maximum throughput.

0 Pressure Profiles Pressure-drop measurements are always desirable, especially in packed columns. 0). 0 Data Requirements-Physical Properties 3 1 4 . 1 Test Mixtures The test mixture must be suited to the column being tested. In particular, the relative volatility and composition must be such that extremes of purity are not reached at either end of the column. Such extremes can exaggerate the effect of errors in composition due to the resulting pinches. Moreover, where one component is in low proportion, it can be largely held up in the column, reflux drum, or sump, leading to difficulty in reaching steady state.

For trays with truncated downcomers, the thermocouples should be placed in the bottom of the downcomer where clear liquid exists. 5 Accurate vapor temperatures in columns are difficult to obtain, and should be avoided unless no other options exist. The accurate measurement of vapor temperatures calls for probes that permit vapor to flow past them, but are effectively shielded from liquid impingement and other sources of conducted or radiated heat to or from the sensing point. Multiple probes at each vertical location, or a single probe with externally variable lengths of insertion into the column, are recommended.

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AIChE Equipment Testing Procedure - Trayed and Packed Columns: A Guide to Performance Evaluation by American Institute of Chemical Engineers (AIChE)

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