The issue of different pressures in the steam generator

It may be necessary to take a look at the original design drawings and data sheets. Each steam generator may correspond to a material that is subject to heat recovery; the pressure or temperature of the steam drum is controlled in conjunction with the outlet temperature of that material. Differences in the inlet temperature of the material undergoing heat recovery result in varying pressures in each steam drum. If, as you say, the pressures in each drum differ significantly (I’m not sure by how much?), and if the pressures are not at the same level, it indicates that the original design is unreasonable; steam pipelines of different levels should be used instead.

It’s suggested that the original poster post a DCS diagram so we can see what the specific situation is

1. The flow of liquids or gases is similar to the flow of electrons and people. 2. Taking the owner’s problem related to the flow of liquids or gases as an example, the outlet pipelines of the three evaporators are connected to each other; this only indicates that the pressure at a certain point in the downstream pipeline network is equal, but it does not mean that the pressures at different locations within the three branches are equal. This is because various factors such as differences in the properties of the fluid, flow rates, and pipeline layout exist within each branch, resulting in different pressure drops across those branches. As a result, the pressures at the tops of the steam drums located in each branch are different, which is a completely normal phenomenon. 3 If it’s difficult to understand, consider the relationship between people movement and roads as an example: residential areas are connected by paths, paths are connected by side roads, and side roads are connected by main roads. Large residential areas with narrow roads lead to traffic congestion at certain times; this so-called \"traffic pressure\" does not mean that the main roads are also congested at the same time ； In medium-sized residential areas with wide roads, the likelihood of congestion decreases, meaning there is less \"traffic pressure\". It’s not clear whether this phrasing helps with understanding. Returning to the original question: if the steam pipes connecting the three drum vessels are of sufficient size, so that the differences in pipeline resistance across the various branches are minimal and can be ignored, then the pressures in the three drum vessels will be approximately the same