Lower liquid temperature in high-pressure washer
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In those cases, why does the liquid temperature in the high-pressure scrubber drop when the ammonia-to-carbon ratio increases?
Under normal conditions, in the production process using the CO2 stripping method, as long as the speed of the methylammonium pump remains constant and the opening degree of the valve for discharging high-pressure off-gases (or sending them to the 0.7 MPa off-gas absorption system) stays unchanged, the liquid output temperature is high and the ammonia-to-carbon ratio is high. As the temperature drops, the N/C ratio decreases.
There is a factory where such a phenomenon occurs; I think it is related to the components of the ammonium hydroxide solution and the N/C ratio of the syngas. In other words, it is related to the N/C ratio of the system
I’m checking the relevant phase diagrams now to see if my prediction is correct
Could you be more specific? What is the temperature of the water used for heat exchange on the shell side of unit 203C? Is the temperature measurement accurate at present? What about the flow rate? And the vent volume? What is the opening degree of HIC-202, and what is the flow rate of the methamine pump? If you’re referring to an increase in N2/C in the gas phase of the synthesis tower, which leads to a drop in temperature, then it’s either because there’s a leak in the explosion-proof components of unit 203C – something that has happened in our plant due to manufacturing defects in the welds of those explosion-proof parts
It is difficult to determine the temperature of the high-pressure washing effluent in production. The factors that generally come into play include the ammonia-to-carbon ratio, the water-to-carbon ratio, the pressure and temperature of the high-pressure system, the temperature of the water used for temperature regulation, the degree of corrosion of the heat exchange tubes used in high-pressure washing, and the composition and temperature of the ammonia solution returned to the high-pressure washing process. An analysis and judgment should be made in light of actual production conditions, while also paying attention to equipment leakage issues.