Explosion of the conversion heat exchanger
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This post was last edited by jiabin135792 on 2016-1-6 at 16:01. We use a H2S-based acid production system with a 2-stage conversion and 2-stage absorption process. Early this morning, the turbine stopped operating spontaneously for no apparent reason; we immediately cut off the feed and organized personnel to restart the turbine. After the turbine resumed operation and feeding began, a dull noise was heard from Heat Exchanger No. 3, and a crack about 15 cm long and 2 cm wide appeared on the surface of the heat exchanger at the weld area. The pressure parameters were relatively normal, but the temperature inside the converter rose instantly from 150°C to 300°C before falling again. Preliminary analysis suggests that a flash explosion was caused by flammable gases, but during the shutdown period, the temperature in the combustion furnace remained around 1000°C, so it’s unlikely that flammable gases could have entered the subsequent system. The industrial gas entering the converter had a temperature of around 30°C, which is not sufficient for combustion. We would appreciate it if experienced professionals could help analyze the cause
What scale of device? Dry method or wet method?
It should be the dry method; the amount of information provided is insufficient, which affects judgment.
It should be a dry process; judging from the temperature in the converter rising instantly from 150°C to 300°C and then falling, it seems that there was a flash explosion of flammable gases, resulting in an immediate release of heat. Is the pressure monitored?
In the dry acid production conversion section, all pressure parameters are within normal ranges