The discussion outlines the advantages and disadvantages of the detailed design by XX Institute under the LUMMUS process
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This post was last edited by liaifeng on 2018-7-28 at 16:48. XX Design Institute undertook the design work for olefin separation at our unit. I have listed below the advantages and disadvantages observed during operation to date, for everyone’s reference; any corrections or suggestions are welcome. At the same time, everyone is welcome to speak. My goal is either to undermine the design institute or to complement its weaknesses, in order to prevent similar incidents from occurring in future projects. 1. The heat tracing system is poorly designed: the pressure difference for the return water is low, and the heat tracing pipes are too long. The hot water tracing does not have a purge interface. 2. Some units are lacking isolation valves; in the event of an accident, it is not possible to isolate them individually, and thus they must be shut down as a whole for maintenance. 3. The valve positioning design is unreasonable, posing safety hazards or making operation difficult. 4. The internal process flow within the device system lacks control valves, making operation and fluctuation adjustment extremely inconvenient. 5. The material of the pipeline used is only of the same grade as the parameters of the medium inside the pipeline. 6. The design is economical, but not perfect. 7. Some pipeline valves have incorrect operation platforms. 8. The flare emission system has defects. 9. The service life of some valves under actual operating conditions has not been fully considered.
Could we add a contact method to discuss in detail?
The existence of such problems indicates that the designers indeed lack experience and have little connection to practical applications； After the project is handed over, it is necessary for operators to improve it in light of actual production conditions ； Sometimes, to save on design costs, property owners turn to unregulated firms, and such things often happen ；
The others remain silent; they only talk about heat tracing. I am responsible for the installation and heating work. The problem you mentioned does indeed exist. However, I did not follow the requirements strictly during construction; for example, regarding the length of the heat tracing, I simply divided it into 2 to 3 sections based on the actual conditions. The purge port was found to be inconvenient during leak testing, so not all the requirements for a purge interface were added. Since it was put into operation, no cases of freezing, blockage, or leakage due to design flaws in the heating system have been detected, as you know