【Daily Question No. 345】December 17, 2018
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【Daily Question No. 345】December 17, 2018: Briefly describe the precautions that should be taken when using high-pressure air cooling First, the medium should be introduced slowly, especially when it is at a high temperature, to ensure even heating of the tube bundle and prevent local heat exchange tubes from deforming or being damaged due to uneven heating. When adjusting the air cooling temperature, it is necessary to avoid shutting down adjacent fans at the same time. (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
①Ensure even water injection at the high-pressure air cooling inlet. ②Pay attention to controlling the inlet temperature of the high-pressure air cooler; it should generally be within the range of 150–160°C. If it is too low, ammonium salts may form...
①Ensure even water injection at the high-pressure air cooling inlet. ②Pay attention to controlling the inlet temperature of the high-pressure air cooler; it should generally be within the range of 150–160°C. Too low a temperature may lead to the formation of ammonium salts, while too high a temperature is not favorable for heat recovery ； ③Pay attention to checking the evenness and symmetry of the air-cooled fan startup, as well as the uniformity of heat dissipation ； ④Pay attention to the uniformity of the outlet temperature for each channel.
The following points should be observed in daily operations: ① Ensure uniform water injection at the inlet of the high-pressure air cooler. ②Pay attention to controlling the inlet temperature of the high-pressure air cooler; it should generally be within the range of 150–160°C. Too low a temperature may lead to the formation of ammonium salts, while too high a temperature is not favorable for heat recovery ； ③Pay attention to checking the evenness and symmetry of the air-cooled fan startup, as well as the uniformity of heat dissipation ； ④Pay attention to the uniformity of the outlet temperature for each channel.
①Ensure even water injection at the high-pressure air cooling inlet. ②Pay attention to the control of the high-pressure air cooling inlet temperature. ③Pay attention to the uniformity of the outlet temperature for each channel.
First, the medium should be introduced slowly, especially when it is at a high temperature, to ensure even heating of the tube bundle and prevent local heat exchange tubes from deforming or being damaged due to uneven heating. When adjusting the air cooling temperature, it is necessary to avoid shutting down adjacent fans at the same time.
The following points should be observed in daily operations: ① Pay attention to changes in the water injection volume at the inlet of the high-pressure air cooler. Especially when the water injection volume is low, it is even more important to ensure that the water injection for each channel is balanced with the flow rate of the branches ； ②Pay attention to controlling the inlet temperature of the high-pressure air cooler; it should generally be within the range of 150–160°C. Too low a temperature may lead to the formation of ammonium salts, while too high a temperature is not favorable for heat recovery ； ③Pay attention to checking the evenness and symmetry of the air-cooled fan startup, as well as the uniformity of heat dissipation ； ④Pay attention to the uniformity of the outlet temperature for each channel; it can be checked by touching it with your hand or by other methods (be careful to avoid burns). If there is uneven flow, this can be resolved by adjusting the fan distribution, the opening degree of the louvers, and the inlet temperature.
①Ensure even water injection at the high-pressure air cooling inlet. ②Pay attention to controlling the inlet temperature of the high-pressure air cooler; it should generally be within the range of 150–160°C. Too low a temperature may lead to the formation of ammonium salts, while too high a temperature is not favorable for heat recovery ； ③Pay attention to checking the evenness and symmetry of the air-cooled fan startup, as well as the uniformity of heat dissipation ； ④Pay attention to the uniformity of the outlet temperature for each channel.
1. Use air cooling evenly in each group, ensuring that the temperature difference after cooling is not too large. 2. The feed temperature for each circuit in air cooling should not be too low; it is advisable to keep it around 165. 3. The outlet temperature of each air-cooling circuit is uniform, with the temperature difference controlled at 5°C. 4. When starting an air-cooled variable-frequency motor, send signals in small amounts multiple times to avoid faults in the inverter caused by excessive signal strength.
First, the medium should be introduced slowly, especially when it is at a high temperature, to ensure even heating of the tube bundle and prevent local heat exchange tubes from deforming or being damaged due to uneven heating. When adjusting the air cooling temperature, it is necessary to avoid shutting down adjacent fans at the same time.
The following points should be observed in daily operations: ① Ensure uniform water injection at the inlet of the high-pressure air cooler. ②Pay attention to controlling the inlet temperature of the high-pressure air cooler; it should generally be within the range of 150–160°C. Too low a temperature may lead to the formation of ammonium salts, while too high a temperature is not favorable for heat recovery ； ③Pay attention to checking the evenness and symmetry of the air-cooled fan startup, as well as the uniformity of heat dissipation ； ④Pay attention to the uniformity of the outlet temperature for each channel.