METHOD FOR EVALUATING ALKALINITY OF UREA WATER

• Main Authors: KUWAMOTO KEIKO, SHIBATA MANABU, ISHII AKIO
• Format: Patent
• Language: Chinese; English
• Published: 23.07.2019
• Subjects: BLASTING; ENGINE PLANTS IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL; HEATING; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; LIGHTING; MACHINES OR ENGINES IN GENERAL; MEASURING; MECHANICAL ENGINEERING; PHYSICS; STEAM ENGINES; TESTING; WEAPONS

In order to provide a method for quickly evaluating the alkalinity of urea water with a simple operation a method for evaluating the alkalinity of urea water used for an SCR system is provided, the method including: a step for adding only once, into a strong acid-containing test solution, a predetermined amount of a urea water sample to prepare a mixture; a step for measuring the pH of the mixture; and a step for determining whether the urea water sample is degraded by comparing the measured pH of the mixture and a predetermined reference pH. 目的在于提供以简便的操作迅速评价尿素水的碱度的方法，所述尿素水的碱度评价方法对SCR系统中使用的尿素水的碱度进行评价，包括：向含有强酸的试液中仅添加1次预定量的尿素水样品来调制混合液的工序；对上述混合液的pH进行测定的工序；以及对测得的混合液的pH与预先确定的基准pH进行比较来判断尿素水样品是否劣化的工序。