Urea production process of high-efficiency condensation, low-mounting height CO2 air stripping method and high-voltage lamp type full condensation reactor
A technology of installation height and production process, applied in the field of high-pressure tubular full-condensing reactors, can solve problems such as difficulty in rational utilization, low steam pressure, and short residence time, and achieve the effects of saving investment, convenient operation, and easy maintenance and repair.
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[0037] The present invention will be further explained below in conjunction with the drawings:
[0038] Reference figure 2 , In the high pressure loop process, the CO 2 14.5MPa(A) after compressor compression, CO at 120℃ 2 The gas enters the high pressure system in two parts, 75-85% CO 2 The gas enters the tube side of the high-pressure stripping tower 3 from the bottom, 15-25% CO 2 The gas enters the urea synthesis tower 2 from the bottom to maintain its heat balance; the high-pressure stripping tower 3 is a falling film heater, and the shell side is heated with 2.2MPa(A) steam to provide the ammonium carbamate decomposition plant from the urea synthesis tower 2 The required heat, the stripping gas produced by the reaction (ie NH 3 And CO 2 The gas) enters the bottom tube side of the high-pressure tubular total condensation reactor 1 from the top outlet of the tube side of the high-pressure stripping tower 3; on the other hand, the methylammonium liquid enters the high-pressure scr
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