Why can’t the ammonia-based flue gas desulfurization technology be widely adopted?
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At present, a small number of catalytic cracking units and sulfur recovery units have ammonia-based flue gas desulfurization systems installed at their exhaust ends, which offer many advantages overall: the recovery of sulfuric acid can generate profits, and the absence of wastewater discharge is also an advantage. Let’s discuss together: why can’t the ammonia-based flue gas desulfurization method be widely adopted, and what is the current operating status of such devices?
Cost? Safe? Secondary pollution?
The ammonia-based desulfurization process still has a strong market in the chemical industry, as the ammonium sulfate produced has economic value. If applied to thermal power units, it equates to adding a source of danger to the plant site, namely the storage of liquid ammonia. Furthermore, ammonia-based desulfurization does not fundamentally solve the problem of aerosols, and it can lead to secondary pollution
Companies do not pay enough attention to this issue; many, under environmental pressure, introduce or add ammonia-based desulfurization systems, and this generally has no impact on the main processing units. In some cases, the performance of these main units is already poor, and under market pressure, companies focus their efforts elsewhere rather than on environmental protection. This is just my personal opinion!
The first point is correct – it’s expensive, very expensive