Can deeply hydrolyzed wastewater and methanol residues be fed together into a jacketed or low-pressure boiler?
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The hydrolysis wastewater from glycol and urea plants, as well as methanol residues, are key targets for environmental control; how can they be reused in the jackets of gas furnaces or low-pressure boilers?
Yes, the quality of water in these two types of waste fluids is quite good. Primarily, the waste liquid resulting from deep hydrolysis must meet the required standards; the levels of ammonia and urea, especially urea, must be kept low, as otherwise it will cause corrosion and shorten the lifespan of the jacket. Waste liquid containing methanol isn’t a problem.
We keep the ammonia content in our hydrolysis waste liquid below 40 PPm; it works well when sent to the gas generation jacket. Before adopting hydrolysis and relying only on stripping, the corrosion of the jacket was severe. As for the distillation residues, we send them to wastewater treatment facilities for evaporation
Methanol waste liquid contains organic acids, which cause significant corrosion to equipment. However, some methanol waste liquids contain sodium carbonate or even sodium hydroxide, and this can lead to caustic embrittlement in boilers or jacketed boilers, resulting in quite serious damage. One must be cautious!
The key to whether it can be reused lies in the effectiveness of hydrolytic desorption If the ammonia and urea levels in the hydrolysis wastewater can be kept below 5 ppm, it is feasible to reuse them. If the ammonia and urea levels in the hydrolysis wastewater are high, it is recommended not to reuse it.
Methanol residues cannot be introduced directly; they must be treated first, otherwise they will cause corrosion to the equipment