**4. Conclusions**

This paper investigates the effect of flue gas flow rate, flue gas temperature, wastewater flow rate, initial wastewater temperature, and droplet size on the desulfurization wastewater evaporation performance in a spray drying tower without deflectors. These studied results can provide valuable information to improve the operational performance of the desulfurization wastewater evaporation technology with flue gas. Some conclusions are reached:


**Author Contributions:** Writing—original draft, D.L.; investigation, N.Z.; writing—review and editing, Y.F.; project administration, Z.X. All authors have read and agreed to the published version of the manuscript.

**Funding:** This research was funded by Critical Technology Research and Integrated Application for Wastewater Resources and Zero-Emission in High Water Consumption Enterprises (GD-KJXM20183546).

**Institutional Review Board Statement:** Not applicable.

**Informed Consent Statement:** Not applicable.

**Data Availability Statement:** Data is contained within the article.

**Conflicts of Interest:** The authors declare no conflict of interest.
