DEIPA协同压力对干法制备Ca(OH)2性能的影响及工艺参数研究

doi:10.16552/j.cnki.issn1001-1625.2025.0096

摘要/Abstract

摘要： 高比表面积Ca(OH)₂凭借低成本、高脱硫性能、脱硫产物可二次利用等优点被广泛应用于烟气脱硫领域,但是目前国内高比表面积Ca(OH)₂的制备工艺尚未成熟,大部分依靠进口。本研究以工业级石灰为原料,以高温蒸压釜作为消化装置,在干法制备Ca(OH)₂的过程中优化消化工艺参数,探究改性剂种类及掺量、压力等条件对Ca(OH)₂性能的影响。采用比表面积及孔隙度分析仪、粒度分析仪、X射线衍射(XRD)和扫描电子显微镜(SEM)对样品进行了表征。结果表明,在水灰质量比0.45、原料粒径小于1.250 mm、搅拌速度200 r/min、消化压力0.5 MPa、添加3%(相对于石灰的质量分数)二乙醇单异丙醇胺(DEIPA)的条件下,所制备的Ca(OH)₂质量分数为92.1%,比表面积(BET)为32.878 7 m²/g,孔体积为0.166 2 cm³/g,颗粒粒径主要集中在10 μm以下。压力可以在一定程度上缓解DEIPA对样品Ca(OH)₂质量分数的降低作用。本研究为干法制备高比表面积Ca(OH)₂提供理论依据,对于酸性气体污染处理、含硫烟气净化及相关应用具有重要的意义。

关键词: 干法消化, 氢氧化钙, 改性剂, 比表面积, 孔体积, 压力

Abstract: High specific surface area Ca(OH)₂ has been widely used in the field of flue gas desulfurization due to its low cost, high desulfurization performance and secondary utilization of desulfurization products. However, the preparation process of high specific surface area Ca(OH)₂ in China is not yet mature, and most of high specific surface area Ca(OH)₂ rely on imports. In this study, industrial grade lime was used as raw material, and high temperature autoclave was used as digestion device to optimize the digestion process parameters in the process of dry-prepared Ca(OH)₂. The effects of modifier type and dosage, pressure and other conditions on the properties of Ca(OH)₂ were investigated. The samples were characterized by specific surface area and porosity analyzer, particle size analyzer, XRD and SEM. The results show that under the conditions of water cement mass ratio of 0.45, raw material particle size less than 1.250 mm, stirring speed of 200 r/min, digestion pressure of 0.5 MPa, and addition of 3% (relative to the mass fraction of lime) diethanol monoisopropanolamine (DEIPA), the prepared Ca(OH)₂ mass fraction is 92.1%, the specific surface area (BET) is 32.878 7 m²/g, the pore volume is 0.166 2 cm³/g, and the particle size is mainly concentrated below 10 μm. The pressure can mitigate the effect of DEIPA on the Ca(OH)₂ mass fraction in the sample to a certain extent. This study provides a theoretical basis for the dry-prepared Ca(OH)₂ with high specific surface area, which is of great significance for acid gas pollution treatment, sulfur-containing flue gas purification and related applications.

Key words: dry digestion, calcium hydroxide, modifier, specific surface area, pore volume, pressure

中图分类号:

TQ132.3⁺2

张朝阳, 薛建勋, 高鹏, 梅文政, 武肖剑, 周明凯. DEIPA协同压力对干法制备Ca(OH)₂性能的影响及工艺参数研究[J]. 硅酸盐通报, 2025, 44(8): 3096-3104.

ZHANG Chaoyang, XUE Jianxun, GAO Peng, MEI Wenzheng, WU Xiaojian, ZHOU Mingkai. Effect of DEIPA Synergistic Pressure on Performance of Dry-Prepared Ca(OH)₂ and Process Parameter Study[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2025, 44(8): 3096-3104.

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DEIPA协同压力对干法制备Ca(OH)₂性能的影响及工艺参数研究

Effect of DEIPA Synergistic Pressure on Performance of Dry-Prepared Ca(OH)₂ and Process Parameter Study

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