Regarding hazardous chemical processes
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I would like to ask the experts here for some advice. Recently, I encountered a project where the owner intended to use the combined alcohol method for ammonia synthesis. This process involves producing hydrogen gas from coal and steam (gas generation), converting CO and CO2 along with hydrogen into methanol, and then carrying out ammonia synthesis. Personally, I think these three fall under the category of new coal chemical industries as per Document No. 116, and correspond to the three hazardous chemical processes of hydrogenation and synthesis. However, the current safety assessment of this facility only covers one hazardous chemical process, namely ammonia synthesis. When communicating with the owner, they also insist that it belongs to the ammonia synthesis process. I would appreciate it if the experts could advise me on how to make such a judgment.
I also believe it falls under the ammonia synthesis process; after all, gas production and methanol synthesis are both part of the ammonia synthesis process, and it is not possible to separate them into distinct process products.
There’s no doubt that gas production and ammonia synthesis are linked; however, methanol production and ammonia synthesis can be carried out independently. Ammonia plants may not produce methanol, and methanol plants may not produce ammonia. Both of these products are bulk commodities, and it’s not feasible to produce them in small quantities – after all, there aren’t enough experts available for the necessary design and analysis work
Hydrazine process for ammonia synthesis: 1) It is integrated into the ammonia synthesis process; therefore, it must meet both the requirements of the ammonia synthesis process and those of methanol synthesis. Any change in the process conditions of either party will affect the production and operation of synthetic methanol and synthetic ammonia; therefore, necessary supplementary adjustment measures must be implemented during production to ensure that both synthesis processes can proceed simultaneously. 2) Since it is connected in series in the ammonia synthesis process, the process gas after methanol synthesis must also be purified before proceeding to the ammonia synthesis reaction. Therefore, the composition of the raw materials after being converted into synthetic methanol must meet the requirements of production. Methanol synthesis gas is produced through partial recycling, and methanol synthesis is not the final stage of the entire production process. 3) Compared with the ammonia synthesis process, since hydroxylamine uses a copper-based catalyst, its resistance to poisoning is poor; therefore, special purification measures must be taken. It is necessary to retain CO and CO2, which are essential for the synthesis of methanol, while preventing gases such as H2S from entering the system – This article comes from **Chemical Engineering Forum; original address: https://bbs.mahoupao.com/thread-140760-1-1.html
According to this view, the three processes can be analyzed as a single process in order to achieve simultaneous implementation of the three aspects. During operation, if one of ammonia or methanol production stops, can the other product operate independently? If it operates independently, is it theoretically necessary to register with the safety supervision authorities? Otherwise, in the event of an accident, would that be considered illegal instruction to change the production process?