How does the CO2 stripping urea process reduce gas consumption?
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Our plant produces 950,000 tons of urea per year; currently the load is at 80%. How can we reduce gas consumption while increasing production during normal operation? For example: 1. The pressure in the low-pressure steam drum is 0.63 MPa, with 17 T/h of steam being supplied to the compressor. 2. If I increase the steam supply to the compressor to 20 T/h, the pressure in the low-pressure steam drum drops to 0.6 MPa. Which of these two methods results in lower gas consumption? 3. To what extent does the higher or lower pressure in the low-pressure steam drum affect gas consumption?
The steam consumption of urea plants is a perennial topic. The fundamental issue still lies in the conversion rate. Under fixed process conditions, the only fundamental solution is to be able to actively control the water-to-carbon ratio in the synthesis tower. Therefore, full-process optimization is required. On the basis of improving the equilibrium conversion rate, by using appropriate trays in the synthesis tower, the conversion rate can be maximized, thereby resolving issues such as ammonia consumption, gas consumption, and electricity consumption. Of course, under the current conditions, optimizing operations will also reduce consumption.