Waste acid from pyrolysis incinerators
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The multiple manholes and connections of the acid waste pyrolysis incinerator in our plant that are exposed to the air have suffered corrosion and perforations; the pouring material has seeped outside. Most seriously, there are also perforations on the side of the flue of the preheating boiler. I would like to ask if anyone else has encountered similar problems and how they were resolved
Our factory has just started the pyrolysis project. The flue gas cooler used at the outlet of our furnace is used for heat exchange with air
Could I add you as a friend to ask you some questions?
For furnaces used to treat waste acid, the temperature of the furnace enclosure should be kept above the flue gas dew point to prevent acid corrosion. The furnace enclosure needs to be insulated.
Avoiding dew point corrosion is an important aspect of acid production management. The reason why corrosion is easier to control when acid production plants are in operation is not because it is easier to keep the temperature of certain pipes or equipment above the dew point temperature while the plants are running. If the acid production unit is shut down for an extended period, it becomes impossible to control dew point corrosion in carbon steel equipment. In wet acid production, since there is no drying tower, the process cannot be stopped; if the wet acid production facility is shut down for an extended period, dry gas must be introduced for displacement.
Achieve intrinsically safe corrosion prevention technology
The waste sulfuric acid treatment unit in our plant has been in operation for over a year, and efforts have been made to address the issue of flue gas causing corrosion to the pipes. Its performance is satisfactory at present, although the target of replacing the components once a year has not been met.