Effect of Gas-Liquid Contact Intensification on Heat and Mass Transfer in Deflector and Rod Bank Desulfurization Spray Tower

Round 1

Reviewer 1 Report

The article is devoted to the actual problem of intensification of gas-liquid contact by heat and mass transfer in a spray tower. Two options for changes in internal devices are considered in comparison with the original effect  tower. At the same time, after reading the article, I had comments:

1. How much is the adequate the model water droplets by the Lagrangian method in this problem? You have to prove in the text a this approximation for problem. You write that water droplets are like solid spheres. At the same time, the calculations show mixing in the lower part of the tower, where the drops can combine into larger ones. Why is the evaporation of water from droplets ignored, because the gas temperature can reach 140 ^oC? Also in the text, I did not find the selected drop diameter in the calculations.

2. Section 2 is written very poorly. You should only write the parameters in the equations that you use in the calculations. For example: not described how to set F_l in equation (5); not described how to set F_other in equation (10); not described how to define D and C in equation (13); how to set C_D, K_total and other parameters are not described.

3. Equation (4). What models and data are used to set the parameters of the equation for the considered process of mass transfer.

4. In section 3.1 there is no designation on the computational domain. There is no description of the boundary conditions. Where is the gas inlet, where is the liquid inlet and others? It is not clear where the porous zone is. Therefore, the incomprehensibly constructed geometric model corresponds to the experiment or not.

5. There is no description of gas and liquid parameters such as density and viscosity.

6. The values ​​of the temperature drop and pressure drop at the inlet and outlet of the calculated growth are considered, but there are no temperature and pressure distribution fields that can help to understand the reasons for the drop.

7. Inconclusive description of pressure drop decreasing for DST case. You must prove it. Any additional element usually leads to additional resistance and an increase in pressure drop.

Author Response

Please see the attachment.

Author Response File: Author Response.docx

Reviewer 2 Report

In this paper, the internal optimization mechanism of deflector desulfurization spray tower (DST) and rod bank desulfurization spray tower (RBST) are studied. Some general and specific points are necessary to provide a better understanding of the work for the reader as well as to get a better idea of the actual contribution of this work:

1. The authors should clearly establish which the novelty of the work is.
2. The authors should avoid using abbreviations in the title of a paper.
3. In the introduction section, the author should clarify which elements contribute to operating costs.
4. The author should list the feed conditions such as component, composition,...
5. The author should add more introductions of DST and RBST.
6. The author should show the operating conditions of OST, DST, and RBST in Figures.
7. How to guarantee your simulation results?
8. Rewrite the conclusions section to emphasize the important contribution of this work, not summarize the points already made in the body.

Author Response

Please see the attachment.

Author Response File: Author Response.docx

Round 2

Reviewer 1 Report

The manuscript may be accepted in the present version.

Reviewer 2 Report

I think that the revised manuscript has indeed been greatly improved and the crucial information that was lacking before has now been presented so the work is well substantiated. The current version of the manuscript can be published.