Problems with the hydrogenation unit
Thread Content
The last edit to this post was made by lyhgchem on 2012-3-28 at 15:04. 1. The feedstocks for hydrogenation units include gasoline and diesel, wax oil, and residue. The processing of gasoline and diesel involves hydrorefining, while the hydrogenation of wax oil is part of the refining process aimed at removing impurities to prepare the material for FCC; does this also fall under hydrocracking to lighten heavy oils? Definition of hydrogenation: Hydrogenation refining, hydroprocessing, hydrocracking? 2. How many towers are there in the hydrogenation unit? (Fractionation tower, stripping tower) Are the fractionation tower and the stripping tower now combined into one? 3. Pre-distillation tower: Under what circumstances is a pre-distillation tower necessary? 4. What is the main function of a stripping tower? Is it that, depending on the raw material being processed, different sections of the tower are used for butane removal, ethane removal, pentane removal, and hydrogen sulfide removal? How many stripping towers are there in total? 5. When reviewing information on hydrogenation units, terms such as low-boiling-point oil and high-boiling-point oil are often encountered. What are cold/high-temperature low-boiling-point oils, and what are cold/high-temperature high-boiling-point oils? 6. Which products come out of the hydrogenation reactor, and which columns do they go into respectively? I’m not very clear about hydrogenation units; please give me some guidance, thanks!
Hydrogenation units are mainly used for refining, cracking, and reforming. The main function of refining is to remove impurities, with the molecular structure of the raw material remaining essentially unchanged. In contrast, cracking not only removes impurities but also alters the molecular structure of the raw material, turning large molecules into smaller ones. Modification mainly involves upgrading the product to meet the user’s requirements, such as increasing the cetane number and reducing the freezing point and density. Hydrogenation can be carried out using either a single-tower process or a two-tower process; the single-tower approach tends to result in water contamination in the product, which is why it is less used in new facilities nowadays.
To be honest, if you’re not familiar with these issues, I suggest you first read books on hydrogenation units and oil refining, such as those by Li Dadong and Fang Xiangchen; they should be helpful to you. At the moment, the hydrogen sulfide stripping tower and the distillation tower are not merged, nor can they be merged. First, you need to understand what function each tower serves; it’s not something that can be done simply by combining them! Read the book yourself to find out what high and low oil levels are. . . . . . Of course, it’s good to ask questions!
I’m introducing this book to you! Very comprehensive; the author of \"Q&A on Hydrogenation Technology\" forgot this! I have the electronic version; feel free to contact me if you need it!
One can read some basic books to address fundamental issues; recommendations include: Catalytic Hydrogenation Technology: (1) Volume 1 – Hydrofining; (2) Volume 2 – Hydrocracking. The Oil Refining Plant Operation Guide series – Operation Guide for Hydrocracking Plants – by Li Liquan (2005) ……
There are really many issues; it’s impossible to answer them all. You can also talk with the hydrogenation staff from time to time to find out more
One can read some basic books to address fundamental issues; recommendations include: * U8 ^( d6 H7 z6 [- ? Catalytic Hydrogenation Technology: (1) Volume 1 – Hydrofining; (2) Volume 2 – Hydrocracking% D! d1 N" \2 k+ R# `$ o' r Oil Refining Plant Operation Guides Series – Operation Guide for Hydrocracking Plants – Li Liquan (2005) $ V# i2 `; s& J# ~... ...
In the case of FCC hydrogenation, it belongs to mild hydrocracking; MHC is more commonly used by foreigners
If you get the chance, go and see an oil refinery; everything will become clear. I guess those who don’t want to answer you are from oil refineries
Catalytic hydrogenation technology: (1) Volume 1 – Hydrofining; (2) Volume 2 – Hydrocracking. Does anyone have the electronic version? Please share it
Buy a book on hydrogenation and study it at home at your own pace; everything will be taken care of