Can the slag treatment and heat recovery units of the Texaco process be arranged as a combined unit?
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As the title suggests, a problem was identified during the review of a project: the sludge treatment system and the heat recovery unit for gas conversion are arranged together as a combined facility, separated by a common utility tunnel. This issue was raised during the review. How to deal with it! ! ! I’m eager to learn from you! ! !
Could someone help reply? Thanks!
It should be fine to arrange them together as long as the fire and explosion prevention requirements are met!
I am extremely grateful for your reply. The current situation is that, in accordance with the requirements of Table 4.2.12 in the Code for Fire Protection Design of Petrochemical Enterprises GB50160-2008, two Class A installations are required to be separated by 30 meters. If they are considered as a combined installation, then this separation distance is not necessary, which saves space. However, a combined installation is defined as one in which two or more installations have direct feed connections, no intermediate material storage tanks, and operate and shut down simultaneously; only when all these conditions are met can they be regarded as a combined installation. Given the current situation, the concept of direct feeding is rather unclear; since there is no other connection between the sludge from Texaco’s process and the shift reaction apart from flash vapor and condensate, I’m not sure whether this can be considered direct feeding. That’s why I posted this to learn from everyone*.
The main feed for the shift reaction is water gas. If the scrubber tower is removed from the gasification framework and placed inside the slag and water treatment unit, then the gas will pass through the water scrubber tower before being fed directly into the shift reaction unit; this can be considered direct feeding, I suppose
To make use of land more efficiently, some companies have begun to consider designing their facilities as integrated units; it’s sufficient to consult experts to find reasonable reasons for this approach. After all, we hire those experts anyway, so it’s good to seek their advice. Hehe
It can be said that the direct feed is raw gas, which also meets the requirement of starting and stopping operations simultaneously; the concern is that they might calculate it on a series basis.
Yes, but Texaco’s process combines a wash tower with gasification
The poster’s issue relates not only to the combined layout of the units but also to the process coupling; the ammonia content in the condensed liquid and black water produced by the conversion process is high, so it is best to couple the gasification and conversion systems together for ammonia removal. It is understood that in the current cold shock process, the ammonia level is too high, making wastewater treatment difficult. Several operating plants are implementing wastewater ammonia removal processes.