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Continuous method of preparing high quality slaked lime slurry from low quallity unslaked lime and method of neutralizing acidic gases using high quality slaked lime slurry obtained therefrom
The present invention relates to a method for preparing liquid calcium hydroxide. The method comprises: a mixing step of continuously mixing water at a temperature of 40-60℃, recycled in a water tank, with unsliced lime such as low-quality unsliced lime so as to continuously obtain a mixture thereof; a hydrating and grinding step of initiating the reaction of the unsliced lime and the water by stirring the mixture so as to hydrate the unsliced lime into calcium hydroxide and grinding particles of unsliced lime and particles of calcium hydroxide so as to obtain calcium hydroxide oil; a step of primarily wet-classifying the calcium hydroxide oil so as to remove impurities; a wet-grinding step of further wet-grinding the calcium hydroxide oil in a wet-grinding apparatus so as to obtain liquid calcium hydroxide; a step of secondarily wet-classifying the liquid calcium hydroxide so as to remove impurities and milling beads therefrom; a step of measuring, in real-time, a concentration of the liquid calcium hydroxide using an inline densitometer and automatically adjusting the amount of the raw material according to a desired concentration; and a step of storing the liquid calcium hydroxide in a liquid calcium hydroxide storage. According to the present invention, the method is advantageous of being used to continuously prepare high-quality liquid calcium hydroxide quickly and efficiently at low costs through a simple process by using inexpensive low-purity, low-quality unsliced lime which was not usable in a conventional case.
수화조에서 리사이클링된 40 내지 60℃의 물과 저품질 생석회 등의 생석회를 연속 혼합하여 이들의 혼합물을 연속적으로 얻는 혼합 단계; 상기 혼합물을 교반하여 생석회를 물과 반응시켜 소석회로 수화시키면서 생석회의 입자 및 소석회 입자의 분쇄를 수행하여 소석회유를 얻는 수화 및 분쇄 단계; 불순물을 제거하기 위하여 소석회유를 1차 습식 분급하는 단계; 소석회유를 습식 마쇄기에서 소석회유를 더욱 습식 마쇄하여 액상 소석회를 얻는 습식 마쇄 단계; 불순물 및 밀링 비드를 제거하기 위하여 액상 소석회를 2차 습식 분급하는 단계; 액상소석회의 농도를 인라인 농도계를 이용하여 실시간으로 측정하고 원하는 농도에 맞게 원료랑을 자동 조절하는 단계; 및 액상 소석회를 액상 소석회 저장조에서 저장하는 단계를 포함하는 액상 소석회의 제조 방법이 제공된다. 본 발명에 따르면, 종래에 이용할 수 없었던 값싼 저순도의 저품질 생석회를 이용하여 고품질 액상 소석회를 저비용으로 효율적이고 간단한 공정을 통하여 단기간에 연속적으로 제조할 수 있는 장점이 있다..
Continuous method of preparing high quality slaked lime slurry from low quallity unslaked lime and method of neutralizing acidic gases using high quality slaked lime slurry obtained therefrom
The present invention relates to a method for preparing liquid calcium hydroxide. The method comprises: a mixing step of continuously mixing water at a temperature of 40-60℃, recycled in a water tank, with unsliced lime such as low-quality unsliced lime so as to continuously obtain a mixture thereof; a hydrating and grinding step of initiating the reaction of the unsliced lime and the water by stirring the mixture so as to hydrate the unsliced lime into calcium hydroxide and grinding particles of unsliced lime and particles of calcium hydroxide so as to obtain calcium hydroxide oil; a step of primarily wet-classifying the calcium hydroxide oil so as to remove impurities; a wet-grinding step of further wet-grinding the calcium hydroxide oil in a wet-grinding apparatus so as to obtain liquid calcium hydroxide; a step of secondarily wet-classifying the liquid calcium hydroxide so as to remove impurities and milling beads therefrom; a step of measuring, in real-time, a concentration of the liquid calcium hydroxide using an inline densitometer and automatically adjusting the amount of the raw material according to a desired concentration; and a step of storing the liquid calcium hydroxide in a liquid calcium hydroxide storage. According to the present invention, the method is advantageous of being used to continuously prepare high-quality liquid calcium hydroxide quickly and efficiently at low costs through a simple process by using inexpensive low-purity, low-quality unsliced lime which was not usable in a conventional case.
수화조에서 리사이클링된 40 내지 60℃의 물과 저품질 생석회 등의 생석회를 연속 혼합하여 이들의 혼합물을 연속적으로 얻는 혼합 단계; 상기 혼합물을 교반하여 생석회를 물과 반응시켜 소석회로 수화시키면서 생석회의 입자 및 소석회 입자의 분쇄를 수행하여 소석회유를 얻는 수화 및 분쇄 단계; 불순물을 제거하기 위하여 소석회유를 1차 습식 분급하는 단계; 소석회유를 습식 마쇄기에서 소석회유를 더욱 습식 마쇄하여 액상 소석회를 얻는 습식 마쇄 단계; 불순물 및 밀링 비드를 제거하기 위하여 액상 소석회를 2차 습식 분급하는 단계; 액상소석회의 농도를 인라인 농도계를 이용하여 실시간으로 측정하고 원하는 농도에 맞게 원료랑을 자동 조절하는 단계; 및 액상 소석회를 액상 소석회 저장조에서 저장하는 단계를 포함하는 액상 소석회의 제조 방법이 제공된다. 본 발명에 따르면, 종래에 이용할 수 없었던 값싼 저순도의 저품질 생석회를 이용하여 고품질 액상 소석회를 저비용으로 효율적이고 간단한 공정을 통하여 단기간에 연속적으로 제조할 수 있는 장점이 있다..
Continuous method of preparing high quality slaked lime slurry from low quallity unslaked lime and method of neutralizing acidic gases using high quality slaked lime slurry obtained therefrom
저품질 생석회를 이용하여 고품질 액상 소석회를 얻기 위한 연속 제조방법 및 이에 의하여 얻어진 액상 소석회를 이용하는 산성 가스의 중화 방법
LIM CHANG KYOO (author) / HAN KI MIN (author)
2021-06-18
Patent
Electronic Resource
Korean
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