【Q&A Question 227】2018.08.21
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【Q&A Question 227】August 21, 2018: The operating parameters of the equipment are normal, but the temperature at the outlet of the air cooler for the reaction effluent is too high. Increasing the speed of the fans does not help to lower this temperature. What could be the cause? a. The high-pressure air cooling tubes are severely blocked or scaled; b. The high-pressure heat exchanger is not operating properly, resulting in an excessively high inlet temperature for the air cooler handling the reaction effluent. (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 high-pressure air-cooling tube bundle is severely blocked or scaled. The high-pressure heat exchanger is not operating properly, resulting in an excessively high temperature at the inlet of the air cooler for the reaction effluent.
Briefly explain: The operating parameters of the unit are normal, but the temperature at the outlet of the air cooler for the reaction effluent is too high, and increasing the speed of the fans does not help to lower this temperature. What could be the reason? Answer: It is affected by the dry and wet temperatures of the air
Is there too much dust accumulated on the air cooler?
Scaling leads to a decrease in heat transfer efficiency；
The reasons are: 1. The set value of the regulator for the outlet temperature of the high-pressure air cooler is too high; 2. The high-pressure air cooling tube bundle is severely blocked or scaled; 3. The high-pressure heat exchanger is not operating properly, resulting in an excessively high inlet temperature of the reaction effluent to the air cooler.
It may occur in summer, when temperatures in this area are relatively high and air cooling is not sufficient to cool down the logistics.
1. Large-scale blockage or scaling of the high-pressure air-cooling tube bundle; 2. Abnormal operation of the high-pressure heat exchanger, resulting in an excessively high inlet temperature of the reaction effluent to the air cooler.
(1) The set value of the high-pressure air cooling outlet temperature regulator is too high. (2) Extensive blockage and scaling in the high-pressure air cooling tube bundle. (3) Abnormal operation of the high-pressure heat exchanger, resulting in an excessively high inlet temperature of the reaction effluent to the air cooler