合成氨净化工段工艺流程

合成氨净化工段工艺流程
英文回答：
The purification process in the ammonia synthesis section is crucial for ensuring the production of high-quality ammonia. This process involves the removal of impurities, such as carbon dioxide, water, and hydrogen sulfide, from the synthesized ammonia gas.
The first step in the purification process is the removal of carbon dioxide. This is typically done using an absorption column, where the ammonia gas is brought into contact with a solvent, such as monoethanolamine (MEA). The carbon dioxide in the gas reacts with the MEA to form a soluble compound, which can then be separated from the ammonia gas.
After the removal of carbon dioxide, the next step is the removal of water. Water is a common impurity in the ammonia gas and can have detrimental effects on downstream
processes. To remove water, the ammonia gas is passed through a series of adsorption beds containing a desiccant, such as molecular sieves. The desiccant selectively adsorbs the water molecules, allowing the dry ammonia gas to pass through.
The final step in the purification process is the removal of hydrogen sulfide. Hydrogen sulfide is a toxic and corrosive impurity that needs to be removed to meet product specifications. This is typically done using a chemical reaction with a scavenger, such as iron oxide or zinc oxide. The scavenger reacts with hydrogen sulfide to form a solid compound, which can then be separated from the ammonia gas.
Overall, the purification process in the ammonia synthesis section involves the removal of carbon dioxide, water, and hydrogen sulfide from the synthesized ammonia gas. This ensures the production of high-quality ammonia that can be used in various industrial applications.
中文回答：
合成氨净化工段的工艺流程对于确保高质量氨的生产至关重要。

该过程涉及从合成氨气体中去除二氧化碳、水和硫化氢等杂质。

净化过程的第一步是去除二氧化碳。

通常使用吸收塔来完成这
一步骤，其中将合成氨气体与溶剂（如单乙醇胺）接触。

气体中的
二氧化碳与单乙醇胺反应生成可溶性化合物，然后可以与合成氨气
体分离。

去除二氧化碳后，下一步是去除水分。

水是合成氨气体中常见
的杂质，对下游工艺有不利影响。

为了去除水分，合成氨气体通过
一系列含有干燥剂（如分子筛）的吸附床。

干燥剂选择性地吸附水
分子，使干燥的合成氨气体通过。

净化过程的最后一步是去除硫化氢。

硫化氢是一种有毒和腐蚀
性的杂质，需要去除以满足产品规格要求。

通常使用铁氧化物或氧
化锌等捕捉剂与硫化氢发生化学反应。

捕捉剂与硫化氢反应生成固
体化合物，然后可以与合成氨气体分离。

总体而言，合成氨净化工段的工艺流程涉及从合成氨气体中去
除二氧化碳、水和硫化氢。

这确保了生产出可用于各种工业应用的
高质量氨。