What is the function of the booster in the urea evaporation system?
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In the urea production process, what is the role of the booster in the two-stage evaporation process? How should it be operated? How can blockages in the booster be prevented, and what should be done if a blockage occurs?
Dude, you’re already in 6th grade – please don’t test us with these questions, okay?
In two-stage evaporation, the booster is used to increase the pressure of the gas extracted in the second stage of evaporation. Since the pressure of the gas extracted in this stage is 0.003–0.004 Mpa, ordinary circulating water is not sufficient to condense steam mixtures at such a low pressure; by raising the pressure of the extracted gas, it becomes possible to condense it in the condenser. It is necessary to flush this system with water every 2–4 hours to prevent crystallizations from causing blockages
I agree with the second-floor gentleman’s view; the analysis is reasonable.
That makes sense. May I ask what the optimal pressure level is?
The pressure in the second evaporation stage is relatively low, at 3.5 Kpa (absolute pressure). The secondary steam is condensed using cooling water, and the temperature of this cooling water must be below 25°C. However, the temperature of the circulating water in my workshop is 32°C; therefore, the secondary steam cannot be condensed directly using this circulating water. As a result, it is necessary to increase the pressure. When the pressure rises to 12 Kpa (absolute), the condensation temperature of the steam becomes 49°C, at which point the 32°C circulating water can be used for condensation. Therefore, a booster pump needs to be designed for the second stage. As for the issue of crystalline blockages: it is generally required that the liquid level control in the main separator not be set too high. Another measure is to regularly wash the condenser tubes using spray water
Discussion with Hua-7017722 from Haiyou: Regarding the issue you mentioned about crystal clogging – that generally the liquid level control of the main control separator should not be set too high – I’m not sure what you mean by “main control separator” In actual production, the operation of primary and secondary evaporation separators cannot be controlled arbitrarily; it is mainly determined by factors such as the level of production load. Let’s discuss this issue; please other sea friends keep sharing their valuable opinions! :handshake
Is it the central control system? If this guy’s granulation valve is a control valve that is operated by the central control staff, then the separator level should refer to the level of the liquid coming from the second distillation stage. We can be controlled. This post was last edited by Durian on 2009-3-27 10:03.]