Help question — Use of steam evacuators
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Our plant uses three stages of vacuum extraction in the pressure reduction tower; the steam consumption is 2 t/h for the first stage, 0.5 t/h for the second stage, and 4.5 t/h for the third stage. Is this distribution of steam reasonable? During this period, the vacuum level has been fluctuating frequently. When these fluctuations occur, the temperature of the condensate in the secondary condenser is around 50°C; at the same time, the shell and the oil and gas pipelines are quite hot to the touch. However, the temperatures of the primary and tertiary coolers, as well as the temperature of the shell, remain normal. What do you all think might be the cause of this problem?
Logically, the steam volume should increase gradually. The temperature of the secondary condenser is high after cooling; could there be some issue that prevents an increase in the amount of steam being pumped out?
That’s a vague question. First, there are no diagrams; second, is the vacuum level increasing or decreasing?
The fluctuations can be considered in terms of whether there are changes in steam flow, pressure, temperature, and mass; secondly, whether the density, flow rate, temperature, and pressure of the oil and gas have changed compared to before; thirdly, the issues related to the secondary extractor itself. It is also necessary to check whether the condensate path in the vacuum section is unobstructed, as well as the status of the circulating water supply in the steam condensation section
There’s a problem with the cooling water in Unit 2, right?