[Q&A Question 258] 2018.09.21
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【Q&A Question 258】September 21, 2018: Briefly describe the impact of changes in gas pressure on the reaction temperature. How should this be handled? Under normal circumstances, when the composition remains largely unchanged, an increase in pressure leads to an increase in temperature, while a decrease in pressure results in a decrease in temperature. The solution is to switch the pressure control system to manual mode immediately if there are large fluctuations in gas pressure. During normal operation, the pressure should be maintained at a specified value within the range of 0.2–0.3 MPa (adjusting according to the process guidelines of one’s own facility and practical experience). (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
Pressure increases, temperature rises; pressure decreases, temperature falls – treatment methods； Adjust the gas pressure control valve: increase the pressure by raising the set wind pressure value, and decrease the pressure by lowering the set wind pressure value. If the gas pressure fluctuates significantly, switch the control valve to manual mode immediately; during normal operation, maintain the pressure at 0.2–0.3 MPa, or at some specified value.
Changes in gas pressure directly affect the temperature inside the furnace of the heating unit, which in turn influences the reaction temperature. 1. An increase in gas pressure leads to an increase in furnace temperature, and consequently an increase in reaction temperature. 2. A decrease in gas pressure results in a decrease in furnace temperature, and thus a decrease in reaction temperature. 3. Fluctuations in gas pressure can also cause fluctuations in the reaction temperature. Solutions: 1. Stabilize the gas pressure; if there is a gas pressure control valve, set it to the appropriate pressure level
Pressure increases, temperature rises; pressure decreases, temperature falls. Solution method； Adjust the gas pressure control valve: increase the pressure by raising the set wind pressure value, and decrease the pressure by lowering the set wind pressure value. If the gas pressure fluctuates significantly, switch the control valve to manual mode immediately; during normal operation, maintain the pressure at 0.2–0.3 MPa, or at some specified value.
As gas pressure increases, the temperature rises; as gas pressure decreases, the temperature falls. Treatment method； Adjust the gas pressure control gauge: increase the pressure by raising the set wind pressure value, and decrease the pressure by lowering the set wind pressure value. If the gas pressure fluctuates significantly, switch the control to manual mode immediately; during normal operation, maintain the pressure at a specified value between 0.2–0.3 Mpa.
Pressure increases, temperature rises; pressure decreases, temperature falls – treatment methods； Adjust the gas pressure control gauge: increase the pressure by raising the set wind pressure value, and decrease the pressure by lowering the set wind pressure value. If the gas pressure fluctuates significantly, switch the control to manual mode immediately; during normal operation, maintain the pressure at a specified value within the range of 0.2–0.3 MPa.
Under normal circumstances, when the composition remains relatively constant, an increase in pressure leads to an increase in temperature, while a decrease in pressure results in a decrease in temperature. Solution: If there are large fluctuations in gas pressure, it is necessary to immediately switch the pressure control to manual mode. During normal operation, the pressure should be maintained at a specified value within the range of 0.2–0.3 MPa (adjusting this value according to the process guidelines of one’s own facility and practical experience).
Pressure increases, temperature rises; pressure decreases, temperature falls – treatment methods； Adjust the gas pressure control valve: increase the pressure by raising the set wind pressure value, and decrease the pressure by lowering the set wind pressure value. If the gas pressure fluctuates significantly, switch the control valve to manual mode immediately; during normal operation, maintain the pressure at 0.2–0.3 MPa, or at some specified value.
When the gas pressure is low, the temperature of the heating furnace drops; this can be addressed by opening the gas pressure control valve and increasing the number of main burners in order to raise the outlet temperature of the heating furnace, or by reducing the processing volume to maintain the reaction temperature； When the gas pressure is high, it can be reduced through a pressure control valve; by reducing the number of main burners, the reactor temperature can be kept stable.
Pressure increases, temperature rises; pressure decreases, temperature falls. Handling methods； Adjust the gas pressure control valve: increase the pressure by raising the set wind pressure value, and decrease the pressure by lowering the set wind pressure value. If the gas pressure fluctuates significantly, switch the control valve to manual mode immediately; during normal operation, maintain the pressure at 0.2–0.3 MPa, or at some specified value.
Pressure increases, temperature rises; pressure decreases, temperature falls – treatment methods； Adjust the gas pressure control valve: increase the pressure by raising the set wind pressure value, and decrease the pressure by lowering the set wind pressure value. If the gas pressure fluctuates significantly, switch the control valve to manual mode immediately; during normal operation, maintain the pressure at 0.2–0.3 MPa, or at some specified value.