What should the pressure difference between the inlet and outlet of the syngas heat exchanger for the transformed feed gas be controlled at?
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I would like to ask everyone: for an ammonia synthesis plant using water-coal slurry gasification, what should be the appropriate pressure difference between the inlet and outlet of the heat exchanger for the feed gas used in the shift reaction? Excessive pressure difference across the middle baffle can cause short-circuit damage. Generally, it is necessary to keep the dust content in the crude syngas below 1%. Can the adsorbent tower be moved from in front of the reformer to in front of the feed gas heat exchanger? Thank you.
The operating pressure at our old plant is around 50 kPa or less; this is because the slurry coal process leads to severe ash accumulation, requiring frequent cleaning of the tubes. Generally, heat exchangers of this type are designed to be easy to disassemble and clean. In the new plant’s process, the filter (what you refer to as the adsorption tower) is placed after the raw gas separation tank and before the raw gas heat exchanger, and the designed pressure difference for this heat exchanger is 30 kPa.