Bubble towers are a piece of equipment that offers a considerable exchange area (comparing to, for example, a wet wall c

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Bubble Towers Are A Piece Of Equipment That Offers A Considerable Exchange Area Comparing To For Example A Wet Wall C 1 (73.52 KiB) Viewed 11 times

Bubble towers are a piece of equipment that offers a considerable exchange area (comparing to, for example, a wet wall column) at a low cost (relative to, for example, a tower packed). In this project you are asked to investigate the design of the gas diffuser used in these columns. You have a flow of 3 N m3/min (normal cubic meters per minute) of air contaminated with 800 ppm SO2. It is desired to remove 95% of the SO2 present in the air using SO2-free water as a receiving medium through a bubble column. The design of this equipment (bubble columns) requires estimating a series of variables, including gas retention. This retention, in turn, is a function of the diameter of the bubbles and the amount of them that enter. The latter is a function of the diffuser, the number of holes, their diameter and the speed of the gas in each hole. Therefore, the design of the diffuser affects the performance of the bubbler tower and is decisive for its performance. Based on the description above, you are asked to do the following: 1. Investigate how diffuser sizing (design its size) is done for a bubbler tower. Present the correlations that are required to determine the diameter of the holes, how many are there and the velocity of the gas in them (4 pts). 2. Present a calculation algorithm (detailed instructions with the use of the equations and the criteria that must be considered) to determine what was requested in the previous point (4 pts). 3. Design a diffuser with the correct size for the conditions specified in this article (if required, consider a 20 m tall tower with a gas retention of 0.3, this retention is of course a function of the diffuser itself) (16 pts). For the previous section, remember to include the complete procedure, explaining the criteria, the equations and the detailed calculations.