Cold-quench type converter

Cold-quench type converter uses the cold-state syngas before reaction to undergo quench-cool between beds so as to decrease the temperature of reaction gas. The merit of cold-quench type converter is its simple and reliable structure. But it is more difficult to get high net value because of the dilution... 

In the converter, only one of the three cooling methods mentioned above can be used, also two of them can be combined for application. For example, the cold-quench type is used between the first and the second bed, and the indirect heat exchange type is used between the second and the third bed. Some interchangers between beds are placed outside the converter such as Brown converter (Fig. 9.22). It is worth noting that because the ammonia synthesis reaction on the Fe catalyst needs high temperature (400-550°C) and high pressure (over 10 MPa), the... 

Heat exchange in multi-bed direct heat exchange reactor is by directly adding a cold gas to the reaction gas to lower the reaction temperature this is the so-called cold-quench . If the quenching gas is the feed gas, it is called feedgas quench , such as the Topspe S-100 type ammonia converter, and ICI cold-quencher ammonia synthesis converter. If the quenching gas is not the feed gas, it is called non-feedgas quench , such as the steam cold-quench carbon monoxide shift reactor. 

Fig. 2 shows I.C.I. cold-shot quench converter methanol loop which operates similar to the warm-shot loop. This adiabatic type quench reactor with its associated equipment is used when the syngas entering the methanol loop is stoichiometric or slightly carbon rich. It has the same adiabatic reactor profile as shown in Fig. 3. The main features of the cold-shot reactor loop are ...

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