| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for treating excess ammonia liquor continuously and stably over a long period of time.SOLUTION: A part of excess ammonia liquor generated during purifying coke oven gas is introduced into a decompression type ammonia stripper 1 and subjected to vacuum distillation, ammonia is removed from a part of the excess ammonia liquor and ammonia-containing steam distilled from the decompression type ammonia stripper 1 is introduced into a condenser 11, followed by cooling and condensation. At this time, the ammonia-containing steam is condensed while spraying the other part of the ammonia liquor to the vicinity of an introduction port into which the ammonia-containing steam is introduced of an inner surface of the condenser 11.SELECTED DRAWING: Figure 1 |
