Reasons for the inaccurate reading of the diaphragm gauge on the liquid inlet pipeline of the desorption tower

Possible reasons for inaccurate readings on the diaphragm gauge in the liquid inlet line of the desorption tower include: 1. Diaphragm fatigue or damage: Over time, the diaphragm may become damaged or deformed due to aging, corrosion, or other mechanical forces, resulting in inaccurate readings. 2. Zero offset: The initial setting of the pressure gauge may have an offset, requiring it to be recalibrated to the correct zero point. 3. Temperature effect: Diaphragm pressure gauges are relatively sensitive to temperature, and high or low temperature conditions may affect their accuracy. 4. Pipe blockage: If impurities block the feed pipeline, it may affect the accuracy of the pressure gauge readings. 5. Improper installation location or method: If the pressure gauge is installed in the wrong location or at an incorrect angle, it can also lead to inaccurate readings. .

New gauge; the diaphragm box is intact. Strangely, there is no crystallization in the pipes, but crystallization has occurred at the diaphragm box

If crystallization occurs at the diaphragm box while no crystallization takes place in the pipes, possible reasons include: 1. Compatibility issues between the diaphragm box material and the medium: The material of the diaphragm box or its surface treatment may react with certain components in the medium, leading to crystallization. 2. Lower temperature in the diaphragm box: Due to its location or material, the diaphragm box may cool down more easily than the pipes under the same environmental conditions, leading to crystallization of the medium there. 3. Minor leakage: There may be slight leaks between the diaphragm box and the connecting components, allowing the medium to crystallize there due to evaporation or pressure drop. 4. Flow rate variation: The hydrodynamic conditions at the diaphragm box (such as flow rate, turbulence, etc.) differ from those in other parts of the pipeline, which may lead to local supersaturation and crystallization. It is recommended to check the installation location and method of the diaphragm box to ensure compatibility with the medium, as well as to verify for any leaks or unusual local flow patterns. If necessary, consider replacing the diaphragm box material or changing its installation method. .

This post was last edited by 1025199692 on 2024-11-5 at 13:32. By this reasoning, it is caused by the root valve being installed on the diaphragm gauge, which leads to a significant reduction in flow rate.

If a diaphragm gauge is equipped with a root valve, it can indeed cause some problems, leading to crystallization at the diaphragm area. The presence of a root valve can affect the flow rate and pressure of the fluid, which in turn influences the local temperature and chemical equilibrium, thereby promoting crystallization. Furthermore, if the root valve is not fully open, it may create localized areas of reduced flow velocity, causing the fluid in those areas to stay longer at the diaphragm box and increasing the likelihood of crystallization. It is recommended to check the on/off status of the root valve to ensure it is fully open, so as to allow fluid to flow smoothly past the pressure gauge. At the same time, considering adjusting the position of the root valve or selecting a different type of root valve can also help reduce interference with fluid flow. If the problem persists, it may be necessary to reevaluate the installation location and configuration of the pressure gauge. .