Heat exchange efficiency of the heat exchanger
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As shown in the figure, it is a methanol heat exchanger: circulating water flows in the tube side, while methanol flows in the shell side, with a heat exchange area of 323.6 square meters. The design temperature on the shell side is 90/40. The design temperature on the tube side is 27/39. At the current partial load condition, the temperature on the shell side is 75/57, while the temperature on the tube side is 22/25. I would like to ask the experienced experts: what is the problem? How to solve it?
Based on the data you provided, the performance of the methanol heat exchanger does not seem to be satisfactory. The temperature drop of methanol on the shell side is smaller than the design requirement, and the temperature rise of water on the tube side also fails to reach the designed value. Possible problems include: 1. Insufficient heat exchange area or dirt accumulation leading to low heat exchange efficiency. 2. Improper flow configuration may result in too low a flow rate, preventing the formation of effective turbulence and thus reducing heat exchange efficiency. Solutions may include: 1. Cleaning the heat exchanger to remove dirt inside the pipes. 2. Adjust the flow rate to increase the flow on the shell side and the tube side. 3. Check and optimize the pump and valve configuration in the system to ensure sufficient power and the correct flow direction. It is recommended to first conduct a thorough inspection and cleaning of the system, then adjust the actual operating parameters to see if there is an improvement in the heat exchange efficiency. .
Dirt can have some impact, but the main issue is the flow rate of the cooling water
The heat exchanger must be scaled; my ultrasonic descaling and anti-scaling equipment can solve this problem. Prevents scaling on the shell side and tube side of heat exchangers online, ensuring safe operation of the equipment. Technical exchanges are available if needed. 13310124630
Has the traffic been reached? The flow rate must be too low. It seems that the spacing between the baffle plates in the diagram is quite large, and there is also a lot of space at the rear end of the shell-side baffles. Was the drawing prepared by a design institute or by the manufacturing factory?
Are the inlet and outlet positions on the shell side too close together?
There is non-condensable gas in the tube side and shell side! Line up! ! ! ! ! !
Since there is no flow rate calculation, it’s unclear whether the heat exchange area is sufficient Assuming there is sufficient heat exchange area: 1. In terms of hardware, the partition behind this shell side is too far away; based on the flow velocity, it can be determined that there is a problem in this area. 2. In terms of software, since the water temperature rise does not meet the requirements, and since the scaling has already been removed, the issue must lie in the flow rate and the level of turbulence. baffle spacing
The actual temperature measured on site is as follows; please offer your guidance, experienced experts