Problems with desulfurization towers
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I would like to ask everyone: how are the diameter and height of the desulfurization tower determined in power plant flue gas desulfurization? Thank you
It is determined comprehensively based on the number of trays installed and the flue gas volume.
You can determine it based on the following factors: 1. The diameter of the tower depends on the flow rate of the flue gas; you just need to determine the flue gas flow rate using the method you choose. Once you know the amount of flue gas and its flow rate, it’s easy to calculate the tower diameter! 2. The height of the tower is the result of adding together the heights of various components: the height of the circulation tank, the height of the inlet flue, the height of the spray layer, the height for flushing, and the height of the demisting layer. Of course, the distances between these components also need to be taken into account!
The diameter and height of a power plant’s desulfurization tower are determined as follows: the diameter is first determined based on the gas velocity inside the tower, which is generally between 3.0 and 4.5. Several desulfurization towers have been studied, and for them the gas velocity is usually set at 3.7–3.8. Once the gas flow rate (under specific operating conditions) is known, the diameter of the tower can be calculated； The height of the tower should be determined based on the desulfurization efficiency by determining the number of mass transfer units; thereafter, it is calculated by adding together the mass transfer height, the height of the slurry tank, the height of the chimney inlet, the height of the demister, and other related values.
I’ve done this quite a few times, haha. First, the diameter of the desulfurization tower is determined based on the flue gas flow rate; it’s important to use the flow rate at the flue gas outlet as the basis for calculations. Generally, the speed in the wet process is between 3.4 and 3.7; the speed is chosen based on the sulfur content – a lower sulfur content allows for a higher speed. As for the height of the second desulfurization tower, it is determined by the number of sections it has. In the wet process I use, this includes the height of the slurry tank, the distance from the centerline of the slurry tank to the inlet of the flue gas duct, the height of the reaction section, the height of the spray layer section, the height of the demister section, and the distance from the outlet of the demister to the outlet of the flue gas. The specific values for these parameters are determined based on the experience of each company