Steam feed and return water

Without a pressure difference, circulation cannot occur. Generally, the pressure in the condensate water network is lower than that of the steam network; in other words, the pressure in the steam network should be higher than 1.0, while that in the condensate water network should be below 1.0. If it’s difficult to increase the steam pressure, then reducing the pressure in the condensate water network slightly will suffice. This kind of adjustment should not be difficult

The condensate should be discharged to the deaerator, where the pressure is low.

It’s because the pressure in your condensate pipe network is too high. Normally, the pressure in a condensate pipe network is around 0.3 Mpa, while the pressure in the steam system is around 0.8 MPA

This is an interesting question. I’m not familiar with the piping configuration of your system, but I can try to explain it. This pressure buildup issue can be attributed to problems related to the amount of steam and condensate, as well as to issues in the production process. A steam network connected to a production facility should consist of high-pressure, medium-pressure, and low-pressure steam lines, as well as separate condensate water networks. Under normal circumstances, there is no conflict between steam and condensate water. However, in some special situations—such as in large-scale turbine systems where high-pressure steam is used as the driving force—the systems can be of either extraction-type or backpressure-type. If the backpressure is provided by low-pressure steam, then as the pressure in the high-pressure steam network decreases, the demand for high-pressure steam increases, which in turn leads to an increase in the production of low-pressure steam. This raises the pressure in the low-pressure steam network. Meanwhile, the condensate water from medium-pressure steam usually has a higher temperature, so it can be used as low-pressure steam; thus, there is a connection between the condensate water from medium-pressure steam and the low-pressure steam network. When the demand for high-pressure steam increases, the amount of low-pressure steam used as backpressure also increases, raising the pressure in the low-pressure steam network. This, in turn, creates a pressure buildup that raises the pressure of the condensate water from medium-pressure steam. Since medium-pressure steam is typically produced by cooling and reducing the pressure of high-pressure steam, a decrease in high-pressure steam pressure results in a corresponding decrease in temperature. As a result, the pressure in the medium-pressure steam network also becomes lower than normal. The decrease in high-pressure steam pressure leads to a decrease in the pressure of the medium-pressure steam network, while the pressure of the condensate water network rises. This creates a situation where one pressure level is higher and the other lower, resulting in a smaller pressure difference, which may lead to pressure buildup. Of course, this is a relatively extreme situation in theory. By restoring the high-pressure steam pressure, the situation should gradually improve. The above are purely my personal assumptions; they may not be correct. Please forgive the Fang family for this.

The condensate piping network is first depressurized to allow the steam to exchange heat with the heat exchanger; the pressure of the condensed water after this heat exchange is generally lower than that of the steam. It is this pressure difference that creates the driving force necessary for circulation.

The pressure in the condensate piping network is too high; it needs to be reduced. It is also necessary to find out the cause of this high pressure. Each heating return line is equipped with a steam trap, and the operation of these steam traps can lead to high condensate pressure