2 replies to this topic

[oranJADE92]

Hi, 

 

I am looking for some help with starting the calculation the size of a direct contact cooler as part of a retrofitted post-combustion carbon capture plant. Im considering using a spray jet..

 

I have attached a diagram including all the streams in and out.

Any push in the right direction would be great. Im struggling to find background reading.

 

Regards

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[PingPong]

I think that such DCC has a packing bed in it and is sized like any other packed bed based on required UA and max allowable pressure drop.

[Padmakar Katre]

Hi, 

 

I am looking for some help with starting the calculation the size of a direct contact cooler as part of a retrofitted post-combustion carbon capture plant. Im considering using a spray jet..

 

I have attached a diagram including all the streams in and out.

Any push in the right direction would be great. Im struggling to find background reading.

 

Regards

Hello,

You can search with direct contact heat exchange and you can find ways to estimate overall volumetric heat transfer coefficient. The approach is,

1. Estimation of LMTD based on terminal temperature of gas & liquid in/out (deg C)

2. Select type of tray or packing (random, structured or grid and get the details such as specific surface area, % voidage, packing size etc.

3. Estimate gas and liquid side and then overall volumetric heat transfer coefficient (Kcal/h-m3-C). There are various correlations available if you have access to it. Few of those are free to download at Ind Chem Eng. website and FRI.

 

Once you know the duty, overall U and LMTD, you can estimate the packing volume required. You can estimate diameter (based on hydraulics) which will give you cross-sectional area; according packed bed Height can be estimated i.e. volume of packed bed divided by column or vessel cross-section area.

 

You can refer book by Ralf J Striggle for Random and Structured packing applications and design for further understanding of concepts involved.