[Q&A Question 057] 2017.02.26
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This post was last edited by 955559 on 2017-7-21 at 22:00. [Q&A Question No. 057] On 2017.02.26, the operating parameters of the equipment were normal, but the temperature at the outlet of the air cooler for the reaction effluent was too high; increasing the speed of the fans did not help to lower this temperature. What could be the reason? The reference answer can be seen after responding, and points will be awarded for identifying the key points. (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) The reasons are as follows: 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. 2017 Q&A Summary Thread (updates have begun) http://bbs.hcbbs.com/thread-1657793-1-1.html 2017 Daily Question Summary Thread (updates have begun) http://bbs.hcbbs.com/thread-1657794-1-1.html 2016 Q&A Summary Thread (updates completed) http://bbs.hcbbs.com/thread-1597792-1-1.html Third Round of Haichuan Outstanding Management Members Selection Contest http://bbs.hcbbs.com/thread-1655902-1-1.html (Source: Haichuan Chemicals Forum)
1. The set value of the high-pressure air cooling outlet temperature regulator 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.
(1) The set value of the high-pressure air-cooling outlet temperature regulator is too high； (2) Large-area blockage or scaling of the high-pressure air-cooling tube bundle ； (3) Abnormal operation of the high-pressure heat exchanger caused the inlet temperature of the reaction effluent air cooler to become too high.
1. The set value of the high-pressure air-cooling outlet temperature regulator is too high； 2. Large-area blockage or scaling of the high-pressure air-cooling tube bundle ； 3. Abnormal operation of the high-pressure heat exchanger resulted in an excessively high inlet temperature of the reaction effluent air cooler.
The processing capacity has increased. The heat of reaction is too high.
1. The set value of the high-pressure air cooling outlet temperature regulator is too high; 2. The high-pressure air cooling tube bundle is heavily blocked or scaled; 3. The high-pressure heat exchanger is not operating properly, resulting in excessively high temperature of the material entering the air cooler.
a. Large-scale blockage or scaling of the high-pressure air-cooling tube bundle; b. Abnormal operation of the high-pressure heat exchanger, resulting in an excessively high inlet temperature of the reaction effluent to the air cooler.
a. Large-scale blockage or scaling of the high-pressure air-cooling tube bundle; b. Abnormal operation of the high-pressure heat exchanger, resulting in an excessively high inlet temperature of the reaction effluent to the air cooler.
The unit is under excessive load, resulting in internal leakage in the reaction effluent/feed heat exchanger
1) The set value of the high-pressure air-cooling outlet temperature regulator is too high； (2) Large-area blockage or scaling of the high-pressure air-cooling tube bundle ； (3) Abnormal operation of the high-pressure heat exchanger caused the inlet temperature of the reaction effluent air cooler to become too high.
(1) The set value of the high-pressure air cooling outlet temperature regulator 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