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High-valued utilization method and system for bypass exhaust ash of cement kiln
The invention belongs to the technical field of energy conservation and environmental protection, and discloses a cement kiln bypass exhaust ash high-valued utilization method and system.The method comprises the following steps that bypass exhaust flue gas is subjected to waste heat recovery through a flue gas heat exchanger, and solid bypass exhaust ash is obtained through gas-solid separation; the flue gas is conveyed into the flue gas washing tower to be washed; washing water generated by washing of the flue gas washing tower and the bypass exhaust ash are input into the extraction tower, and calcium ions in the bypass exhaust ash are extracted by using the washing water to obtain mixed slurry; performing liquid-solid separation to obtain a calcium-containing solution and water-insoluble impurities; and inputting the separated calcium-containing solution into a mineralization reaction tower, adding the washed flue gas and a crystal form control agent into the mineralization reaction tower, carrying out liquid-solid separation, and drying to obtain a finished product of vaterite type calcium carbonate. According to the method, the recycling value of the bypass vent ash is increased, and high-valued utilization of substances in the bypass vent ash is achieved.
本发明属于节能环保技术领域，公开了一种水泥窑旁路放风灰高值化利用方法和系统，包括下列步骤：通过烟气换热器对旁路放风烟气进行余热回收，气固分离得到固体状态的旁路放风灰；烟气被输送到烟气洗涤塔中被洗涤；烟气洗涤塔洗涤产生的洗涤水和旁路放风灰均被输入到萃取塔中，利用洗涤水将旁路放风灰中的钙离子萃取出来得到混合浆液；液固分离得到含钙溶液和不溶于水的杂质；分离出的含钙溶液被输入矿化反应塔，洗涤后的烟气和晶型控制剂也被添加到所述矿化反应塔，再进行液固分离，干燥得到球霰石型碳酸钙的成品。本发明提升了旁路放风灰的回收利用价值，实现了对旁路放风灰中物质的高值化利用。
High-valued utilization method and system for bypass exhaust ash of cement kiln
The invention belongs to the technical field of energy conservation and environmental protection, and discloses a cement kiln bypass exhaust ash high-valued utilization method and system.The method comprises the following steps that bypass exhaust flue gas is subjected to waste heat recovery through a flue gas heat exchanger, and solid bypass exhaust ash is obtained through gas-solid separation; the flue gas is conveyed into the flue gas washing tower to be washed; washing water generated by washing of the flue gas washing tower and the bypass exhaust ash are input into the extraction tower, and calcium ions in the bypass exhaust ash are extracted by using the washing water to obtain mixed slurry; performing liquid-solid separation to obtain a calcium-containing solution and water-insoluble impurities; and inputting the separated calcium-containing solution into a mineralization reaction tower, adding the washed flue gas and a crystal form control agent into the mineralization reaction tower, carrying out liquid-solid separation, and drying to obtain a finished product of vaterite type calcium carbonate. According to the method, the recycling value of the bypass vent ash is increased, and high-valued utilization of substances in the bypass vent ash is achieved.
本发明属于节能环保技术领域，公开了一种水泥窑旁路放风灰高值化利用方法和系统，包括下列步骤：通过烟气换热器对旁路放风烟气进行余热回收，气固分离得到固体状态的旁路放风灰；烟气被输送到烟气洗涤塔中被洗涤；烟气洗涤塔洗涤产生的洗涤水和旁路放风灰均被输入到萃取塔中，利用洗涤水将旁路放风灰中的钙离子萃取出来得到混合浆液；液固分离得到含钙溶液和不溶于水的杂质；分离出的含钙溶液被输入矿化反应塔，洗涤后的烟气和晶型控制剂也被添加到所述矿化反应塔，再进行液固分离，干燥得到球霰石型碳酸钙的成品。本发明提升了旁路放风灰的回收利用价值，实现了对旁路放风灰中物质的高值化利用。
High-valued utilization method and system for bypass exhaust ash of cement kiln
一种水泥窑旁路放风灰高值化利用方法和系统
JIANG TAO (author) / LIU LONGFEI (author) / XU XIAOLIANG (author) / WANG CHENGXIN (author) / MA MING (author) / CHEN QI (author) / TANG CHIZHOU (author)
2024-11-26
Patent
Electronic Resource
Chinese
IPC:
C01F
COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
,
Verbindungen der Metalle Beryllium, Magnesium, Aluminium, Calcium, Strontium, Barium, Radium, Thorium oder der Seltenen Erden
/
C01C
Ammoniak
,
AMMONIA
/
C01D
Verbindungen der Alkalimetalle, d.h. des Lithiums, Natriums, Kaliums, Rubidiums, Cäsiums oder Franciums
,
COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
/
C04B
Kalk
,
LIME
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