METHOD FOR TREATING EXCESS AMMONIACAL LIQUOR

• Main Author: NITTA JUNYA
• Format: Patent
• Language: English; Japanese
• Published: 23.06.2016
• Subjects: CHEMISTRY; DESTRUCTIVE DISTILLATION OF CARBONAGEOUS MATERIALS FORPRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS; FUELS; LUBRICANTS; METALLURGY; PEAT; PERFORMING OPERATIONS; PETROLEUM, GAS OR COKE INDUSTRIES; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; TECHNICAL GASES CONTAINING CARBON MONOXIDE; TRANSPORTING; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

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 【課題】長期間にわたって連続的且つ安定的に運転することが可能な余剰安水の処理方法を提供する。【解決手段】コークス炉ガスの精製時に発生する余剰安水の一部を減圧式アンモニアストリッパー１に導入して減圧蒸留し、余剰安水の一部からアンモニアを除去するとともに、減圧式アンモニアストリッパー１から留出するアンモニア含有蒸気を凝縮器１１に導入して冷却し凝縮させる。このとき、凝縮器１１の内面のうちアンモニア含有蒸気が導入される導入口の近傍部分に、余剰安水の他部をスプレーしつつ、アンモニア含有蒸気の凝縮を行う。【選択図】図１