Wet scrubbers for limestone plants

A new chemical solution has been recently developed and it promotes limestone reactivity and SO2 removal in wet air scrubbers for the air treatment process. The thing is that this scrubber technology allows for decreasing slurry recirculating offering operational and maintenance cost savings.

It should be noted that the chemical solution supposes the use of fewer recycle pumps, therefore, the backpressure of the wet scrubber is lowered resulting in decreasing booster and fan loading. Herewith, the opportunity to reduce the electrical load of scrubber systems leads to an improved heat rate.

When it comes to air treatment at limestone plants, the limestone consists of more than 95% calcium carbonate (CaCO3) content. Additionally, SO2 in the fluid gas changes to the liquid form during the scrubbing process. The operating principle of most wet air scrubbers for limestone plants is based on the air that passes into the reaction tank at the bottom of the absorber tower to transform the hemihydrate to gypsum. Thus, gypsum can be easily removed and used as a construction material.

Nevertheless, the efficiency of air treatment provided by wet scrubbers is dependent on several factors:

  • SO2 amount in the flue gas;
  • Scrubber system’s load;
  • The liquid-to-gas ratio in the wet air scrubber;
  • Limestone reactivity and oxidation air flow rates.

To be more precise, wet scrubbers offer numerous advantages, which can be even increased by enlarging SO2 absorption and limestone reactivity. One more benefit of scrubbing includes a decrease in rotating load leading to corresponding operating and maintenance costs.

Another advantage of scrubbers supposes limestone selection. The thing is that most industries have not got access to high-purity limestones, that is why it is necessary to increase additionally the reactions. A traditional technique is a dibasic acid (DBA) addition to wet air scrubber process streams.

However, a new scrubber technology has been developed to improve greatly the used chemistry. The new scrubbing solution provides a higher buffering ability than conventional liquids. Such a solution offers an additional efficiency boost providing 97–98% removal of particulate pollutants by wet air scrubbers.

Finally, the novel scrubbing solution is a promising technique that significantly improves air treatment efficiency. These wet air scrubbers will be very useful at plants that try to increase the performance and lower parasitic power load.  Herewith, sometimes the technology allows changing to a lower-cost limestone.

If you search for the best air treatment device to improve air quality, you can buy a high-tech completely new type of wet scrubber – a Multi-Vortex wet air scrubber produced by Redwood Technology.

Redwood technology is a fast-growing vendor of wet air scrubbers. The multi-vortex scrubber can remove gas emissions, dust, vapors, and other pollutants from a gas stream. It is an innovative technology created to save water that makes it more cost-efficient and differs from other types of scrubbers. If you have any questions or would like to purchase a multi-vortex wet air scrubber, please contact us at info@rdwd.tech

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