Online cleaning of the cold exchanger in the ammonia synthesis system?
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The heat transfer resistance in the ammonia synthesis system has increased, resulting in poor heat exchange performance. Is it possible to resolve this issue online without shutting down the system? During the maintenance in June, the hot washing system discharged a large amount of white waxy substance, which was likely caused by by-products brought in by high-pressure alcohol hydroformylation.
During a light-load production run, we carried out an online cleaning of the cold exchanger, mainly by controlling the water cooling and ammonia cooling to increase the inlet temperature of the cold exchanger and reduce the resistance; the results were quite good. But the ammonia synthesis catalysts in the first two batches showed slight signs of poisoning.
Could the original poster talk about what the temperatures of the water cooling and ammonia cooling systems were at that time? By cleaning once, we actually increased the pressure difference; at that time, the water cooling temperature was close to 80 degrees, while the ammonia cooling temperature was around 10 degrees ；