Pressure holding issue
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What is the concept of pressure holding? What are the main reasons for it? This problem exists in the synthesis furnace; which other equipment also has this issue?
Pressure buildup should refer to the phenomenon of abnormally high pressure occurring in a certain device or section of pipeline due to the inability of the fluid to flow out properly； The main reasons for pressure buildup are: 1. The outlet valve is not fully open or its valve core has fallen off ； 2. The outlet pipeline is blocked by foreign objects ； 3. Excessive amount of material entering, exceeding its normal flow rate range, etc. This situation can occur with many pieces of equipment in ammonia synthesis plants; in our case, it most often happens in the carbonization towers.
It mainly involves some power equipment, such as centrifugal pumps; when the outlet valve is closed, pressure buildup occurs, which can severely damage the centrifugal pump. This post was last edited by *aoye613 on 2009-4-12 08:27]
The pressure buildup at the outlet of a centrifugal compressor can be fatal, as it very likely leads to surge in the compressor. The reason for the pressure buildup could be an obstructed outlet, insufficient air intake, a malfunctioning outlet shut-off valve or a detached valve core, as well as issues with subsequent processes.
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Pressure buildup is generally a relative concept; the main hazard lies in overpressure, which can lead to catastrophic accidents such as explosions. The reason for this is that what was originally a circulating or low-pressure system becomes one with high pressure due to the presence of organic substances, pumps, or high-pressure power sources that supply high-pressure media. Problems with the outlet or pressure relief mechanisms prevent normal circulation and the maintenance of appropriate pressure, thus resulting in pressure buildup accidents
In short, increased resistance in a certain section downstream causes the pressure in the upstream section to rise. Pressure buildup in the synthesis tower is usually caused by poor reaction performance