Analysis of the reasons for poor heat exchange performance between the top circulation system and the hot water heat exchanger
Thread Content
Analysis of the reasons for poor heat exchange efficiency in the top circulation and hot water heat exchanger: The temperature difference between the fluid drawn out by the top circulation system and the fluid returning to the tower has decreased from 30 degrees at the start of operation to 15 degrees. What is the cause of this?
1. The heat exchange efficiency has decreased. 2. Hot water consumption is high in winter
Do you use heat exchange with hot water for your oil circulation? No heat exchange with circulating water? The temperature of the hot water can be reduced to lower the temperature of the top recirculation tower.
Hot water first exchanges heat with the vapor and oil at the top of the distillation tower; only after that does it exchange heat with the top circulation stream. That’s why it’s difficult to lower the temperature of the hot water
If the tube bundle is clogged with scale, try backblowing
Have you increased the temperature of the hot water?
Scale formed in hot water is likely to be quite hard; will backwashing work? In the case of circulating water, backwashing should be effective
The temperature of the heat transfer water is high! Air resistance! Bias flow! Or internal leakage in the heat exchanger! All of these can lead to a decrease in heat extraction! Continuous drainage and exhaust! Replenish heating medium water
I have also encountered this problem; after investigation, it was found that the issue was caused by insufficient heat absorption due to air blockage in the hot water circuit of the heat exchanger. The air blockage arose because the top-cycle heat exchanger is located at the very top of the heat exchange platform – the heat transfer fluid enters this heat exchanger via one path, while it enters the heat exchangers located lower down via another path. During production, some of the heat transfer fluid is lost, which results in a reduced amount of fluid at the top, thereby causing the air blockage!
Is it caused by the poor water quality? It is recommended to backwash it. There’s unexpected dirt. Hehe