Total alkali consumption of PDS in the PDS wet desulfurization process
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What factors cause the overall alkali consumption in the PDS wet desulfurization process?
This post was last edited by Chemical Gas Purification on 2011-12-17 08:50. The level of alkali consumption is mainly determined by operational controls; theoretically, there should be no alkali consumption, as one substance simply transforms into another and then is converted back through regeneration. However, during the production process, factors such as gas-phase entrainment, secondary salts formed during regeneration, and leaks in the liquid phase within the system can all lead to alkali consumption. In fact, the main source of alkali consumption lies in the entrainment of regenerated sulfur foam. By using a good catalyst, the foam sulfur particles are large, resulting in thorough flotation with little liquid entrainment, and thus lower alkali consumption.
Reply to 2# Chemical gas purification: The alkali consumption is understandable, but how can the PDS loss be explained? Here, the PDS level dropped from 20 mg/L to around 10 mg/L in the past couple of days.
Reply to 3#: It is believed that the losses exceeding those of PDS are mainly caused by the entrainment of sulfur bubbles and normal losses due to fluid flow. The stability of the overall liquid balance is maintained by the alkali solution added on a daily basis. The amount of alkali solution that needs to be added each day corresponds to the amount that is lost; the PDS is also carried away along with that lost alkali. Therefore, it is necessary to replenish PDS in a timely manner, otherwise the total amount will decrease.
Lithium bromide refrigeration plants are used to produce low-temperature chilled water. Low-temperature cold water is supplied to the working area to be used as dust removal water, water for circulating in air coolers, water for spray cooling, and water for the cooling coils in the working area, thereby achieving the purpose of cooling. —In general, a combination of several uses is feasible. The waste heat from lithium bromide units is generally discharged through cooling towers or spray ponds.