Multi-bed catalytic converter
A catalytic converter and multi-bed technology, applied in chemical instruments and methods, ammonia compounds, inorganic chemistry, etc., can solve expensive and other problems
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Embodiment 1
[0050] Table 1 below relates to a multi-bed catalytic converter of an ammonia plant with an ammonia production of 1850 metric tons per day (MTD) and an inert content of 11% at the inlet of the converter. The converter comprises three serially insulated beds containing iron-based catalyst. The volume of the first bed is 5m 3 , the volume of the second bed is 8m 3 , the volume of the third bed is 31m 3 . Table 1 compares the pressure drop values and conversions for the following converter configurations, taking into account their impact in the synthesis loop:
[0051] 1.1 A prior art converter in which all beds contain relatively coarse catalyst. Each bed contained catalyst particles varying in size from 1.5mm to 3mm.
[0052] 1.2 A converter according to the invention, wherein the first bed and the second bed contain catalysts with particles of 1.5 mm to 3 mm, and the third bed contains fine catalysts with particles of 1 mm to 2 mm, i.e. the third bed does not contain mo...
Embodiment 2
[0061] Table 2 below lists the multi-bed catalytic converter of the ammonia plant, which has an ammonia production of 1935 metric tons per day (MTD), an inert content of 15.5% at the converter inlet, and an inlet pressure of 248.5 bar.
[0062] Table 2 compares the pressure drop values and conversions for the following converter configurations:
[0063] 2.1 A prior art converter comprising three adiabatically insulated beds, all containing relatively coarse catalyst, and each bed containing particles varying from 1.5mm to 3mm.
[0064] 2.2 The converter according to the invention comprises three adiabatic beds, wherein the first and second beds contain coarse catalyst and the third bed contains fine catalyst with particles from 1 mm to 2 mm.
[0065] 2.3 The converter according to the invention comprises a first isothermal bed layer and a second adiabatic bed layer, wherein the first isothermal bed layer contains substantially the same catalyst volume as the first two adiaba...
Embodiment 3
[0073] Table 3 below shows the multi-bed catalytic converter of the ammonia plant with a daily ammonia production of 1935 metric tons (MTD), an inert content of 15.5% at the inlet of the converter, and an inlet pressure of 248.5 bar.
[0074] The converter contained three adiabatic beds in series, and Table 3 compares the pressure drop values and conversions for the following configurations:
[0075] 3.1 Converter with shell-and-tube interbed heat exchanger.
[0076] 3.2 Converter with plate interbed heat exchanger.
[0077]
[0078] table 3
[0079] The table shows that the pressure drop is much lower and the conversion is significantly higher for configuration 3.2 with a plate interbed heat exchanger compared to configuration 3.1 with a shell and tube interbed heat exchanger.
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Abstract
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