CN111995371B - 一种强辐射节能型蓄热体 - Google Patents
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Abstract
本发明公开了一种强辐射节能型蓄热体,其原料主要采用铬矿渣、纤维素,经过粉碎、混合、练泥、陈腐、挤压、干燥、烧结等工艺制得,采用本发明的工艺,所制得的蓄热体节能率高,且成本低廉,节能环保。
Description
技术领域
本发明涉及一种强辐射节能型蓄热体,具体涉及一种强辐射节能型蜂窝体、挡板砖及其制备方法,属于陶瓷材料制备领域。
背景技术
蓄热体在高温工业炉窑热量回收利用领域具有重要应用。蓄热体具有耐高温、抗蠕变、高温强度高、蓄热能力强、换热速度快、节能率高等优点,其广泛用于高温工业炉窑等热工设备节能技术方面,使工业炉窑等热工设备提高效率,降低能耗,提高产量和改善质量,是解决能源与环境问题的重要而有效的手段。
目前常用的蓄热体主要有莫来石质、堇青石质、高铝质、刚玉质等,以氧化铝粉、铝矾土、黏土等为主要原料,经混料、练泥、挤出、切割、烘干、烧结制备而成。但是,受上述陶瓷材料特性热导率偏低、热容偏小、红外辐射率偏低等的限制,所得蓄热体虽然可以满足力学性能的要求,但是蓄热能力、换热速度、能量利用效率等均有待提高,才能以最大限度地提升高温工业炉窑热量回收利用效率,贯彻国家节能减排的目的。但是现有的蓄热体制作成本高且热导率热容性也不佳,因此开发一种成本低廉,性能好,节能环保且实用价值高的蓄热体至关重要。
发明内容
针对现有技术的不足,为了进一步提高蓄热体的热导率和红外辐射率,本发明提供一种强辐射节能型蓄热体及其制备方法。
本发明的技术方案为:
一种强辐射节能型蓄热体材料,由以下重量份的原料组成:铬矿渣92~95份,羧甲基纤维素1-5份,豆油1-3份。
所述一种强辐射节能型蓄热体材料,其特征在于:铬矿渣93份,羧甲基纤维素5份,豆油2份。
所述一种强辐射节能型蓄热体材料制备的蓄热体,按照以下方法制备:
S1:将铬矿渣粉碎,分别过120目筛、180目筛和325目筛,取筛下物,进行分级;
S2:将325目、180目和120目筛的筛下物铬矿渣粉,依次按重量份5-50:100:10-50的比例进行颗粒级配,再与羧甲基纤维素、豆油按比例混合,然后加水,在捏合机中捏合混料20-50分钟,制得蓄热体泥料;
S3:将步骤S2制得的蓄热体泥料,投入真空练泥机,练泥2-5遍,至泥料自发热为30-35℃左右;
S4:将步骤S3制得的泥料,放入温度20-25℃、湿度60-65%的陈腐室,陈腐48-72小时;
S5:将步骤S4陈腐后的泥料,再通过真空练泥机练泥1-3遍,然后用真空挤出机挤出成型;
S6:将步骤S5挤出的蓄热体,切割成需要的尺寸,经微波干燥炉快速干燥定型,然后在干燥室内50-80℃最终干燥;
S7:将步骤S6干燥后的蓄热体,在空气气氛下,温度1450-1700℃烧结1-5小时,可得强辐射节能型蓄热体。
步骤S2中混合原料为100重量份,水为13-16重量份,所述的水为去离子水。
步骤S2所述羧甲基纤维素为市售工业原料;所述豆油为市售一级豆油。
一种强辐射节能型蓄热体材料制备的蓄热体,其特征在于:所述蓄热体为蜂窝体和挡板砖。
和现有技术相比,本发明的技术效果为:利用“铬矿渣+纤维素”的复合材料,提高了蜂窝体的红外辐射率,其节能率达5.5%,从而提高蜂窝体与气体的辐射换热效率,加快了换热速度。
本发明的优选实施例所制备的节能型蜂窝体由中钢集团鞍山热能研究院有限公司检测,并出具了《强辐射节能型蜂窝体挡板砖产品检测报告》,证书编号为:202007001。通过采用强辐蓄热体预热空煤气后燃烧比常规蓄热体预热空煤气后燃烧节能量为:(1-0.945)*100%=5.5%。需要注意的是,该加热炉各段为集中换向,本发明优选实施例制备的节能型蜂窝体和常规蜂窝体混装在均热段,受限于常规蓄热体的蓄热能力,换向时间定为90s。由于空气和煤气预热温度分别提高75℃和70℃,此时节能型蜂窝体还具备预热能力,如果进一步强调节能,估计节能型蜂窝体可以延长换向时间35s,充分吸收节能型蜂窝体的蓄热量,节能率还可以再提高2.1s,合计节能率达到7.6%。
本发明所述的制备方法成本低廉、工艺简单、易操作,便于工业化生产。此外,将铬矿渣废物利用,降低了原料成本,减少了废旧矿物对环境的污染。
附图说明
图1为蜂窝体1
图2为蜂窝体2
图3为蜂窝体3
图4为挡砖。
具体实施方式
下面结合实施例对本发明的技术方案做进一步说明,但本发明所保护范围不限于此。
所述一种强辐射节能型蓄热体材料制备的蓄热体包括但不限于蜂窝体和挡板砖,例如:蓄热球、蓄热管等,这里仅以蜂窝体为实施例。
实施例1
一种强辐射节能型蜂窝体材料,其特征在于:铬矿渣93份,纤维素5份,豆油2份。铬矿渣既含有一定量的铬, 又具有高炉矿渣硅钙含量高的特点,铬矿渣耐高温性能好、高温强度大,可以提高蜂窝体的耐高温能力、抗氧化能力、抗剥落能力和荷重软化温度;羧甲基纤维素(CMC),其水溶液具有增稠、成膜、黏接、水分保持、胶体保护、乳化及悬浮等作用,广泛应用于石油、食品、医药、纺织和造纸等行业,是最重要的纤维素醚类之一。羧甲基纤维素在本发明中起粘结的作用。
所述强辐射节能型蓄热体材料制备的蜂窝体,按照以下方法制备:
S1:将铬矿渣粉碎,分别过120目筛、180目筛、325目筛,取筛下物,进行分级;
S2:将325目筛下物铬矿渣粉15份,180目筛下物铬矿渣粉55份,120目筛下物铬矿渣粉23份进行颗粒级配,再与羧甲基纤维素、豆油按比例混合,然后加水,在捏合机中捏合混料20分钟,制得蓄热体泥料;
S3:将步骤S2制得的蓄热体泥料,投入真空练泥机,练泥2-5遍,至泥料自发热为30-35℃左右;
S4:将步骤S3制得的泥料,放入温度20-℃、湿度60%的陈腐室,陈腐48小时;
S5:将步骤S4陈腐后的泥料,再通过真空练泥机练泥1-3遍,然后用真空挤出机挤出成型;
S6:将步骤S5挤出的蓄热体,切割成100*100*100mm尺寸,经微波干燥炉快速干燥定型,然后在干燥室内50℃最终干燥;
S7:将步骤S6干燥后的蓄热体,在空气气氛下,温度1450℃烧结1小时,可得强辐射节能型蓄热体。
步骤S2中混合原料为100重量份,水为13重量份,所述的水为去离子水。
步骤S2所述羧甲基纤维素为市售工业原料;所述豆油为市售一级豆油。
实施例2
一种强辐射节能型蓄热体材料,其特征在于:铬矿渣93份,纤维素4份,特级豆油3份。
所述强辐射节能型蓄热体材料制备的蜂窝体,按照以下方法制备:
S1:将铬矿渣粉碎,分别过120目筛、180目筛、325目筛,取筛下物,进行分级;
S2:将325目筛下物铬矿渣粉18份,180目筛下物铬矿渣粉50份,120目筛下物铬矿渣粉25份进行颗粒级配,再与羧甲基纤维素、豆油按比例混合,然后加水,在捏合机中捏合混料50分钟,制得蓄热体泥料;
S3:将步骤S2制得的蓄热体泥料,投入真空练泥机,练泥2-5遍,至泥料自发热为30-35℃左右;
S4:将步骤S3制得的泥料,放入温度25℃、湿度65%的陈腐室,陈腐72小时;
S5:将步骤S4陈腐后的泥料,再通过真空练泥机练泥1-3遍,然后用真空挤出机挤出成型;
S6:将步骤S5挤出的蜂窝体,切割成150*100*100mm的尺寸,经微波干燥炉快速干燥定型,然后在干燥室内80℃最终干燥;
S7:将步骤S6干燥后的蜂窝体,在空气气氛下,温度1700℃烧结5小时,可得强辐射节能型蜂窝体。
步骤S2中混合原料为100重量份,水为16重量份,所述的水为去离子水。
步骤S2所述羧甲基纤维素为市售工业原料;所述豆油为市售一级豆油。
实施例3
一种强辐射节能型蓄热体材料,其特征在于:铬矿渣92份,纤维素5份,特级豆油3份。
所述强辐射节能型蓄热体材料制备的蜂窝体,按照以下方法制备:
S1:将铬矿渣粉碎,分别过120目筛、180目筛、325目筛,取筛下物,进行分级;
S2:将325目筛下物铬矿渣粉15份,180目筛下物铬矿渣粉55份,120目筛下物铬矿渣粉22份进行颗粒级配,再与羧甲基纤维素、豆油按比例混合,然后加水,在捏合机中捏合混料30分钟,制得蓄热体泥料;
S3:将步骤S2制得的蓄热体泥料,投入真空练泥机,练泥2-5遍,至泥料自发热为30-35℃左右;
S4:将步骤S3制得的泥料,放入温度30℃、湿度63%的陈腐室,陈腐60小时;
S5:将步骤S4陈腐后的泥料,再通过真空练泥机练泥2遍,然后用真空挤出机挤出成型;
S6:将步骤S5挤出的蜂窝体,切割成550*100*100mm的尺寸,经微波干燥炉快速干燥定型,然后在干燥室内65℃最终干燥;
S7:将步骤S6干燥后的蜂窝体,在空气气氛下,温度1550℃烧结3小时,可得强辐射节能型蜂窝体。
步骤S2中混合原料为100重量份,水为15重量份,所述的水为去离子水。
步骤S2所述羧甲基纤维素为市售工业原料;所述豆油为市售一级豆油。
所述一种强辐射节能型蓄热体材料,利用“铬矿渣+纤维素”的复合材料,提高了蜂窝体的红外辐射率,其节能率预计可达7.6%,从而提高蜂窝体与气体的辐射换热效率,加快了换热速度。
需要说明的是,以上列举的仅是本发明的若干个具体实施例,显然本发明不仅仅限于以上实施例,还可以有其他变形。本领域的技术人员从本发明公开内容直接导出或间接引申的所有变形,均应认为是本发明的保护范围。
以上所述的仅是本发明的优选实施方式,应当指出,对于本领域的技术人员来说,在不脱离本发明整体构思前提下,还可以作出若干改变和改进,这些也应该视为本发明的保护范围。
Claims (1)
1.一种强辐射节能型蓄热体材料,由以下重量份的原料组成:铬矿渣92~95份,羧甲基纤维素1-5份,豆油1-3份;所述强辐射节能型蓄热体材料制备的蓄热体,按照以下方法制备:
S1:将铬矿渣粉碎,分别过120目筛、180目筛和325目筛,取筛下物,进行分级;
S2:步骤S1所述的325目、180目和120目筛的筛下物铬矿渣粉,依次按重量份5-50:100:10-50的比例进行颗粒级配,再与羧甲基纤维素、豆油按比例混合,然后加水,在捏合机中捏合混料20-50分钟,制得蓄热体泥料;
S3:将步骤S2制得的蓄热体泥料,投入真空练泥机,练泥2-5遍,至泥料自发热为30-35℃;
S4:将步骤S3制得的泥料,放入温度20-25℃、湿度60-65%的陈腐室,陈腐48-72小时;
S5:将步骤S4陈腐后的泥料,再通过真空练泥机练泥1-3遍,然后用真空挤出机挤出成型;
S6:将步骤S5挤出的蓄热体,切割成需要的尺寸,经微波干燥炉快速干燥定型,然后在干燥室内50-80℃最终干燥;
S7:将步骤S6干燥后的蓄热体,在空气气氛下,温度1450-1700℃烧结1-5小时,可得强辐射节能型蓄热体;
步骤S2中混合原料为100重量份,水为13-16重量份,所述的水为去离子水;
所述蓄热体为蜂窝体和挡板砖;通过采用上述蓄热体预热空煤气后燃烧比常规蓄热体预热空煤气后燃烧节能量为:(1-0.945)*100%=5.5%。
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