【Daily Question 2019】Hydrogen production and hydrogenation section – Question No. 079
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【Daily Question 2019】Hydrogen production and hydrogenation section – Question No. 079: What are the reasons for the excessive hydrogen sulfide content in the lean solution? How to handle it? Reason: ① Low solvent regeneration temperature ； ②The rich liquid has a high acid gas load ； ③The liquid level in the regeneration tower is too high ； ④solvent foaming ； ⑤Leakage inside the rich-poor solvent heat exchanger. Treatment: ① Increase the regeneration pressure and appropriately raise the steam volume ； ②Increase circulation rate to reduce acid gas load ； ③Find the cause of the high liquid level and properly control the liquid level in the solvent regeneration tower ； ④Increase the amount of solvent filtered and inject an appropriate amount of defoamer into the desulfurization system ； ⑤The unit was shut down for inspection, and the rich-poor solvent heat exchanger was isolated. (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) Correct: 3 wealth, Incorrect: 1 wealth ； Mass posting of posts – rated based on the lowest score ； Replies that are unrelated to the answer are considered spam and will be deleted immediately. For management purposes, if you need to view content from a few days ago, please go to https://bbs.hcbbs.com/home.php?mod=space&uid=3862647&do=thread&view=me&from=space through the summary post below
The solvent regeneration temperature is low, so the steam supply volume needs to be increased.
The regeneration effect of the lean liquid is poor. The hydrogen sulfide level in the circulating hydrogen is too high. The circulation volume of the lean liquid decreases. Enhance regeneration. Increase the circulation volume. Top up with fresh lean solution. Discharge waste hydrogen and replenish with new hydrogen.
Answer: 1. The regeneration temperature is low； Treatment measures: 1. Increase the regeneration pressure and appropriately raise the steam volume ； 2. The acid gas load on the rich liquid is high ； 2. Increase circulation volume to reduce acid gas load ； 3. Excessively high liquid level in the regeneration tower ； 3. Identify the cause of the high liquid level and control the liquid level in the tower properly ； 4. Solvent foaming ； 4. Increase the amount of solvent filtered, and inject an appropriate amount of defoamer into the desulfurization system ； 5. Internal leakage in the rich-poor solvent heat exchanger. 5. Shut down the unit for inspection, and isolate the rich and lean solvent heat exchangers.
The regeneration effect does not meet the standards; improve the regeneration effect or add more desulfurization catalysts
①Low solvent regeneration temperature； ②The rich liquid has a high acid gas load ； ③The liquid level in the regeneration tower is too high ； ④solvent foaming ； ⑤Leakage inside the rich-poor solvent heat exchanger. Treatment: ① Increase the regeneration pressure and appropriately raise the steam volume ； ②Increase circulation rate to reduce acid gas load ； ③Find the cause of the high liquid level and properly control the liquid level in the solvent regeneration tower ； ④Increase the amount of solvent filtered and inject an appropriate amount of defoamer into the desulfurization system ； ⑤The unit was shut down for inspection, and the rich-poor solvent heat exchanger was isolated.
Reason: ① Low solvent regeneration temperature； ②The rich liquid has a high acid gas load ； ③The liquid level in the regeneration tower is too high ； ④solvent foaming ； ⑤Leakage inside the rich-poor solvent heat exchanger. Treatment: ① Increase the regeneration pressure and appropriately raise the steam volume ； ②Increase circulation rate to reduce acid gas load ； ③Find the cause of the high liquid level and properly control the liquid level in the solvent regeneration tower ； ④Increase the amount of solvent filtered and inject an appropriate amount of defoamer into the desulfurization system ； ⑤The unit was shut down for inspection, and the rich-poor solvent heat exchanger was isolated.
Reason: ① Low solvent regeneration temperature； ②The rich liquid has a high acid gas load ； ③The liquid level in the regeneration tower is too high ； ④solvent foaming ； ⑤Leakage inside the rich-poor solvent heat exchanger. Treatment: ① Increase the regeneration pressure and appropriately raise the steam volume ； ②Increase circulation rate to reduce acid gas load ； ③Find the cause of the high liquid level and properly control the liquid level in the solvent regeneration tower ； ④Increase the amount of solvent filtered and inject an appropriate amount of defoamer into the desulfurization system ； ⑤The unit was shut down for inspection, and the rich-poor solvent heat exchanger was isolated.