CN107868924A - 一种热障涂层及包含其的超高温悬浮床加氢冷壁反应器 - Google Patents
一种热障涂层及包含其的超高温悬浮床加氢冷壁反应器 Download PDFInfo
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- 239000012720 thermal barrier coating Substances 0.000 title claims abstract description 60
- 238000005984 hydrogenation reaction Methods 0.000 title claims abstract description 26
- 238000007667 floating Methods 0.000 title claims description 17
- 239000000919 ceramic Substances 0.000 claims abstract description 95
- 239000000463 material Substances 0.000 claims abstract description 43
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims abstract description 36
- 229910001928 zirconium oxide Inorganic materials 0.000 claims abstract description 36
- 238000005260 corrosion Methods 0.000 claims abstract description 23
- 230000007797 corrosion Effects 0.000 claims abstract description 22
- 239000013078 crystal Substances 0.000 claims abstract description 21
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 15
- RKTYLMNFRDHKIL-UHFFFAOYSA-N copper;5,10,15,20-tetraphenylporphyrin-22,24-diide Chemical compound [Cu+2].C1=CC(C(=C2C=CC([N-]2)=C(C=2C=CC=CC=2)C=2C=CC(N=2)=C(C=2C=CC=CC=2)C2=CC=C3[N-]2)C=2C=CC=CC=2)=NC1=C3C1=CC=CC=C1 RKTYLMNFRDHKIL-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000010410 layer Substances 0.000 claims description 106
- 239000012790 adhesive layer Substances 0.000 claims description 35
- 229910001220 stainless steel Inorganic materials 0.000 claims description 28
- 239000010935 stainless steel Substances 0.000 claims description 28
- 239000011248 coating agent Substances 0.000 claims description 25
- 238000000576 coating method Methods 0.000 claims description 25
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 14
- 229910052727 yttrium Inorganic materials 0.000 claims description 9
- 229910052782 aluminium Inorganic materials 0.000 claims description 8
- 229910001233 yttria-stabilized zirconia Inorganic materials 0.000 claims description 8
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- 230000035939 shock Effects 0.000 abstract description 5
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- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract description 3
- 239000001257 hydrogen Substances 0.000 abstract description 3
- 229910052739 hydrogen Inorganic materials 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 10
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- 229910052751 metal Inorganic materials 0.000 description 4
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- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
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- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
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- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
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Abstract
本发明提供了一种热障涂层及包含其的冷壁反应器,该热障涂层通过在常规两层结构中夹设第二陶瓷层,第二陶瓷层的材质为氧化铝稳定氧化锆且氧化铝含量不高于30wt%,第二陶瓷层和第一陶瓷层中的氧化锆均具有四方晶系的晶体结构,由此使得本发明的热障涂层具有尽可能低的热导率、高的热膨胀系数且断裂韧性和抗热震性好,进而采用该热障涂层代替传统隔热衬里所形成的冷壁反应器既可满足现有的抗氢腐蚀钢材在超高温下的使用需求,又能充分利用加氢反应器的有效容积,既克服了隔热衬里易于损坏而引起反应器壁局部超温的问题,也免除了由内衬筒连接件的热胀冷缩而造成反应器壁局部应力集中的安全隐患。
Description
技术领域
本发明属于化工设备技术领域,具体涉及一种热障涂层及包含其的可适用于超高温悬浮床加氢的冷壁反应器。
背景技术
在煤化工和石油化工的加氢工艺中普遍使用的加氢反应器按其壳体温度划分可分为两种,一种为“热壁”反应器,另一种则是“冷壁”反应器。热壁反应器因不具有内隔热层,故而其筒壁温度与内部反应温度相差不大;而冷壁反应器的内部设有隔热层,在隔热层的作用下筒壁温度远低于内部反应温度。
虽然热壁反应器的器壁温度分布均匀,不易产生局部过热现象,从而可提高使用安全性,但随着重油加氢技术的发展及我国首套自主研发的超级悬浮床加氢技术的开车成功,悬浮床加氢反应器的设计温度不断提高,甚至高达500℃,已经大大超过了目前国内外现有的抗氢腐蚀钢材的最高使用温度(482℃),由此导致传统的热壁反应器无法适用于超高温加氢工艺。
而冷壁反应器由于其筒壁温度较低,可以应用于内部反应温度高于筒壁材料允许使用的最高温度的工况。传统的冷壁反应器包括反应器本体和支座,反应器本体进一步包括竖直设置的筒体及分别连接于筒体顶部和底部的上封头、下封头,上封头设有出料接管,下封头设有进料接管;且筒体和上、下封头的结构由外向内均依次包括金属壳体、不锈钢堆焊层、隔热衬里和内衬筒,隔热衬里包括紧贴不锈钢堆焊层内壁的隔热耐火砖层和紧贴内衬筒外壁的隔热填料层,内衬筒与金属壳体相连并固定在反应器中央。例如,对于设计温度500℃,设计压力23MPa的悬浮床加氢冷壁反应器,通常金属壳体的材料是2.25Cr-1Mo-0.25V钢,厚度约100mm~200mm,不锈钢堆焊层的材料是TP309+TP347,约7mm~10mm,隔热衬里的材料是Al2O3+CaO,厚度约100mm~150mm,内衬筒的材料是SS321,厚度约7mm~10mm。
由此可见,传统的加氢冷壁反应器仍存在如下问题:1.在相同外形尺寸下,反应器内部有效容积小,影响生产能力,而在相同产能情况下,需要增大外形尺寸,这无疑增加了制造难度和设备投资成本;2.由于设置有相当厚的隔热衬里,使得冷壁反应器的设计、制造及施工均较为复杂,且对内壁检查也极不方便,更何况在实际工况下隔热衬里还容易被损坏,导致热流体渗/流到器壁上,造成外壳体金属局部超温,使安全生产受到威胁或被迫停工;3.由于内衬筒和外壳体连接固定,若设计或施工过程中存在瑕疵,那么在操作温度下连接部位构件的热胀冷缩会造成外壳体的局部应力集中,存在安全隐患。
发明内容
本发明所要解决的技术问题在于克服现有的冷壁反应器所存在的有效容积小、外壳体局部应力集中、隔热衬里厚且易于被损坏的缺陷,进而提供一种有效容积大、外壳体不存在局部应力集中、隔热衬里薄且不易损坏的可适用于超高温悬浮床加氢的冷壁反应器。
为此,本发明实现上述目的的技术方案为:
一种热障涂层,包括粘合层和第一陶瓷层,还包括第二陶瓷层,所述第二陶瓷层设置于所述粘合层与所述第一陶瓷层之间;
所述第二陶瓷层的材质为氧化铝稳定氧化锆,以所述第二陶瓷层的总质量计所述第二陶瓷层中的氧化铝含量不高于30wt%,余量为氧化锆;
所述第一陶瓷层的材质为氧化钇稳定氧化锆,以所述第一陶瓷层的总质量计所述第一陶瓷层含6~9wt%的氧化钇,余量为氧化锆;
所述第一陶瓷层和所述第二陶瓷层中的氧化锆均具有四方晶系的晶体结构。
所述第一陶瓷层的厚度为0.1~0.5mm。
所述第二陶瓷层的厚度为3~10mm。
还包括防腐蚀层,所述防腐蚀层设置于所述第二陶瓷层与所述粘合层之间。
所述防腐蚀层的材质为氧化铝。
所述防腐蚀层的厚度为10~15μm。
所述粘合层的材质为MCrAlY,以所述粘合层的总质量计Cr的含量为25~35wt%、Al的含量为5~10wt%、Y的含量为1.1~1.5wt%、余量为M,且M为Ni、Fe或Co中的一种或多种。
所述粘合层的厚度为30~100μm。
一种超高温悬浮床加氢冷壁反应器,包括反应器筒体,所述反应器筒体包括顺次连接设置的外壳体、不锈钢堆焊层及上述热障涂层,所述热障涂层中的粘合层紧贴所述不锈钢堆焊层设置。
所述不锈钢堆焊层的厚度为4~7mm。
本发明的上述技术方案具有如下优点:
1、本发明提供的热障涂层,通过在常规的两层结构中夹设第二陶瓷层,第二陶瓷层的材质为氧化铝稳定氧化锆且氧化铝含量不高于30wt%,同时第一陶瓷层的材质为氧化钇稳定氧化锆且氧化钇的含量为6~9wt%,第一陶瓷层和第二陶瓷层中的氧化锆均具有四方晶系的晶体结构,由此使得本发明的热障涂层具有如下特点:
a.低的热导率,最低可为1.5W/(m·K),能够有效阻隔热传导;
b.高的热膨胀系数:由于在低于1100℃的情况下四方晶系ZrO2具有膨胀转变为单斜系ZrO2的自发倾向并产生3~5%的体积膨胀,因而可提高整个涂层的热膨胀系数,使之最高可达1.3×10-7m/℃,与不锈钢的热膨胀系数基本一致,因而在操作工况下能够保持与外壳体一致的热胀冷缩,从而可降低外壳体的局部应力;
c.断裂韧性好:由于涂层中存在局部残余应力,使得四方晶系ZrO2在应力条件下相变成单斜系ZrO2并产生一定数量的微裂纹,这些微裂纹降低了作用区的弹性模量,受外力作用时微裂纹以亚临界裂纹缓慢扩展,释放主裂纹尖端的部分应变能,增加了由主裂纹进一步扩展所需的能量,有效地抑制了裂纹扩展,从而提高了整个涂层的断裂韧性,以保证在高温工况下不引起涂层的断裂;
d.抗热震性好:由于在本发明的热障涂层中大尺寸的孔隙和裂纹非常少,主要为微裂纹和孔径低于10μm的孔隙,因而可有效吸收和缓解抗热冲击循环过程中产生的热应力,提高涂层的应变能力,从而提高整个热障涂层的抗热震性,以保证在高温工况下不会由热震动引发涂层破裂。
2、本发明提供的热障涂层,通过在第二陶瓷层与粘合层之间进一步设置由氧化铝制成的防腐蚀层,可有效防止在高压临氢工况下氢原子穿透两层陶瓷层而腐蚀基体,从而在确保基体耐高温的同时也可提高基体的抗腐蚀性。
3、本发明提供的超高温悬浮床加氢冷壁反应器,通过采用本发明所述的热障涂层代替传统的隔热衬里和内衬筒,由于热障涂层的最大厚度不超过11mm,同时还可降低不锈钢堆焊层的厚度,那么在相同外形尺寸下可增大反应器内部的有效容积,从而提高生产能力;另外,由于本发明的热障涂层具有与不锈钢基本一致的热膨胀系数,因而可降低本发明的冷壁反应器外壳体的局部应力,从而消除反应器的安全隐患;除此之外,由于本发明的热障涂层具有较高的断裂韧性和抗热震性,因而可确保本发明的冷壁反应器在500℃的高温工况下依然不易于损坏,从而避免反应器外壳体的局部超温,使得本发明的冷壁反应器能够适用于超高温的悬浮床加氢工艺。
由此可见,本发明所述的冷壁反应器完全克服了传统的加氢冷壁反应器所存在的弊端,既可满足现有的抗氢腐蚀钢材(2.25Cr-1Mo-0.25V)在超高温下的使用需求,又能充分利用加氢反应器的有效容积,既克服了隔热衬里易于损坏而引起反应器壁局部超温的问题,也免除了由内衬筒连接件的热胀冷缩而造成反应器壁局部应力集中的安全隐患。另外,本发明所述的冷壁反应器还可使其内部介质的反应温度得以提高,从而加快了反应速率,缩短了反应时间,提高了液相收率。
具体实施方式
下面将对本发明的技术方案进行清楚、完整地描述,显然,所描述的实施例是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。此外,下面所描述的本发明不同实施方式中所涉及的技术特征只要彼此之间未构成冲突就可以相互结合。
实施例1
本实施例采用大气等离子体喷涂技术制得热障涂层,其包括依次连接设置的30μm厚的粘合层、10mm厚的第二陶瓷层和0.3mm厚的第一陶瓷层,其中:
所述粘合层的材质为NiCrAlY,以所述粘合层的总质量计Cr的含量为25wt%、Al的含量为10wt%、Y的含量为1.3wt%、余量为Ni;所述第二陶瓷层的材质为氧化铝稳定氧化锆,以所述第二陶瓷层的总质量计所述氧化铝的含量为30wt%,余量为氧化锆;所述第一陶瓷层的材质为氧化钇稳定氧化锆,以所述第一陶瓷层的总质量计所述第一陶瓷层含6wt%的氧化钇,余量为氧化锆,并且所述第一陶瓷层和所述第二陶瓷层中的氧化锆均具有四方晶系的晶体结构。
经测定,本实施例中的热障涂层的热导率为1.52W/(m·K),热膨胀系数为1.0×10-7m/℃,断裂韧性值为12MPa·m0.5。
利用本实施例提供的热障涂层代替传统冷壁反应器中的隔热衬里和内衬筒,从而获得一种适用于超高温悬浮床加氢的冷壁反应器,其具体包括反应器筒体,所述反应器筒体进一步包括顺次连接设置的外壳体、不锈钢堆焊层和热障涂层,所述热障涂层中的粘合层紧贴所述不锈钢堆焊层设置,且所述不锈钢堆焊层的厚度为4mm。
实施例2
本实施例采用大气等离子体喷涂技术制得热障涂层,其包括依次连接设置的65μm厚的粘合层、10μm厚的防腐蚀层、3mm厚的第二陶瓷层和0.1mm厚的第一陶瓷层,其中:
所述粘合层的材质为CoNiCrAlY,以所述粘合层的总质量计Cr的含量为30wt%、Al的含量为7.5wt%、Y的含量为1.1wt%、Co的含量为1wt%、余量为Ni;所述防腐蚀层的材质为氧化铝;所述第二陶瓷层的材质为氧化铝稳定氧化锆,以所述第二陶瓷层的总质量计所述氧化铝的含量为22wt%,余量为氧化锆;所述第一陶瓷层的材质为氧化钇稳定氧化锆,以所述第一陶瓷层的总质量计所述第一陶瓷层含7wt%的氧化钇,余量为氧化锆,并且所述第一陶瓷层和所述第二陶瓷层中的氧化锆均具有四方晶系的晶体结构。
经测定,本实施例中的热障涂层的热导率为1.58W/(m·K),热膨胀系数为1.06×10-7m/℃,断裂韧性值为11MPa·m0.5。
利用本实施例提供的热障涂层代替传统冷壁反应器中的隔热衬里和内衬筒,从而获得一种适用于超高温悬浮床加氢的冷壁反应器,其具体包括反应器筒体,所述反应器筒体进一步包括顺次连接设置的外壳体、不锈钢堆焊层和热障涂层,所述热障涂层中的粘合层紧贴所述不锈钢堆焊层设置,且所述不锈钢堆焊层的厚度为7mm。
实施例3
本实施例采用大气等离子体喷涂技术制得热障涂层,其包括依次连接设置的80μm厚的粘合层、13μm厚的防腐蚀层、6.5mm厚的第二陶瓷层和0.4mm厚的第一陶瓷层,其中:
所述粘合层的材质为FeCoCrAlY,以所述粘合层的总质量计Cr的含量为35wt%、Al的含量为5wt%、Y的含量为1.5wt%、Co的含量为0.8wt%、余量为Fe;所述防腐蚀层的材质为氧化铝;所述第二陶瓷层的材质为氧化铝稳定氧化锆,以所述第二陶瓷层的总质量计所述氧化铝的含量为25wt%,余量为氧化锆;所述第一陶瓷层的材质为氧化钇稳定氧化锆,以所述第一陶瓷层的总质量计所述第一陶瓷层含8wt%的氧化钇,余量为氧化锆,并且所述第一陶瓷层和所述第二陶瓷层中的氧化锆均具有四方晶系的晶体结构。
经测定,本实施例中的热障涂层的热导率为1.51W/(m·K),热膨胀系数为1.1×10-7m/℃,断裂韧性值为13MPa·m0.5。
利用本实施例提供的热障涂层代替传统冷壁反应器中的隔热衬里和内衬筒,从而获得一种适用于超高温悬浮床加氢的冷壁反应器,其具体包括反应器筒体,所述反应器筒体进一步包括顺次连接设置的外壳体、不锈钢堆焊层和热障涂层,所述热障涂层中的粘合层紧贴所述不锈钢堆焊层设置,且所述不锈钢堆焊层的厚度为5mm。
实施例4
本实施例采用大气等离子体喷涂技术制得热障涂层,其包括依次连接设置的100μm厚的粘合层、15μm厚的防腐蚀层、8mm厚的第二陶瓷层和0.5mm厚的第一陶瓷层,其中:
所述粘合层的材质为FeNiCrAlY,以所述粘合层的总质量计Cr的含量为28wt%、Al的含量为6wt%、Y的含量为1.2wt%、Fe的含量为1wt%、余量为Ni;所述防腐蚀层的材质为氧化铝;所述第二陶瓷层的材质为氧化铝稳定氧化锆,以所述第二陶瓷层的总质量计所述氧化铝的含量为27wt%,余量为氧化锆;所述第一陶瓷层的材质为氧化钇稳定氧化锆,以所述第一陶瓷层的总质量计所述第一陶瓷层含9wt%的氧化钇,余量为氧化锆,并且所述第一陶瓷层和所述第二陶瓷层中的氧化锆均具有四方晶系的晶体结构。
经测定,本实施例中的热障涂层的热导率为1.55W/(m·K),热膨胀系数为1.25×10-7m/℃,断裂韧性值为10MPa·m0.5。
利用本实施例提供的热障涂层代替传统冷壁反应器中的隔热衬里和内衬筒,从而获得一种适用于超高温悬浮床加氢的冷壁反应器,其具体包括反应器筒体,所述反应器筒体进一步包括顺次连接设置的外壳体、不锈钢堆焊层和热障涂层,所述热障涂层中的粘合层紧贴所述不锈钢堆焊层设置,且所述不锈钢堆焊层的厚度为6mm。
实施例5
本实施例采用大气等离子体喷涂技术制得热障涂层,其包括依次连接设置的45μm厚的粘合层、12μm厚的防腐蚀层、4mm厚的第二陶瓷层和0.2mm厚的第一陶瓷层,其中:
所述粘合层的材质为FeCrAlY,以所述粘合层的总质量计Cr的含量为30wt%、Al的含量为8wt%、Y的含量为1.4wt%、余量为Fe;所述防腐蚀层的材质为氧化铝;所述第二陶瓷层的材质为氧化铝稳定氧化锆,以所述第二陶瓷层的总质量计所述氧化铝的含量为29wt%,余量为氧化锆;所述第一陶瓷层的材质为氧化钇稳定氧化锆,以所述第一陶瓷层的总质量计所述第一陶瓷层含7.5wt%的氧化钇,余量为氧化锆,并且所述第一陶瓷层和所述第二陶瓷层中的氧化锆均具有四方晶系的晶体结构。
经测定,本实施例中的热障涂层的热导率为1.53W/(m·K),热膨胀系数为1.27×10-7m/℃,断裂韧性值为12MPa·m0.5。
利用本实施例提供的热障涂层代替传统冷壁反应器中的隔热衬里和内衬筒,从而获得一种适用于超高温悬浮床加氢的冷壁反应器,其具体包括反应器筒体,所述反应器筒体进一步包括顺次连接设置的外壳体、不锈钢堆焊层和热障涂层,所述热障涂层中的粘合层紧贴所述不锈钢堆焊层设置,且所述不锈钢堆焊层的厚度为7mm。
实施例6
本实施例采用大气等离子体喷涂技术制得热障涂层,其包括依次连接设置的50μm厚的粘合层、11μm厚的防腐蚀层、5mm厚的第二陶瓷层和0.2mm厚的第一陶瓷层,其中:
所述粘合层的材质为FeCrAlY,以所述粘合层的总质量计Cr的含量为33wt%、Al的含量为9wt%、Y的含量为1.4wt%、余量为Fe;所述防腐蚀层的材质为氧化铝;所述第二陶瓷层的材质为氧化铝稳定氧化锆,以所述第二陶瓷层的总质量计所述氧化铝的含量为28wt%,余量为氧化锆;所述第一陶瓷层的材质为氧化钇稳定氧化锆,以所述第一陶瓷层的总质量计所述第一陶瓷层含7.5wt%的氧化钇,余量为氧化锆,并且所述第一陶瓷层和所述第二陶瓷层中的氧化锆均具有四方晶系的晶体结构。
经测定,本实施例中的热障涂层的热导率为1.5W/(m·K),热膨胀系数为1.3×10- 7m/℃,断裂韧性值为13MPa·m0.5。
利用本实施例提供的热障涂层代替传统冷壁反应器中的隔热衬里和内衬筒,从而获得一种适用于超高温悬浮床加氢的冷壁反应器,其具体包括反应器筒体,所述反应器筒体进一步包括顺次连接设置的外壳体、不锈钢堆焊层和热障涂层,所述热障涂层中的粘合层紧贴所述不锈钢堆焊层设置,且所述不锈钢堆焊层的厚度为5mm。
对比例1
本对比例采用大气等离子体喷涂技术制得热障涂层,其包括相互连接设置的100μm厚的粘合层和0.5mm厚的陶瓷层,所述粘合层的材质与本发明实施例4中的粘合层材质相同,所述陶瓷层的材质与实施例4中的第一陶瓷层的材质相同。
经测定,本对比例中的热障涂层的热导率为2W/(m·K),热膨胀系数为0.9×10-7m/℃,断裂韧性值为7MPa·m0.5。
显然,上述实施例仅仅是为清楚地说明所作的举例,而并非对实施方式的限定。对于所属领域的普通技术人员来说,在上述说明的基础上还可以做出其它不同形式的变化或变动。这里无需也无法对所有的实施方式予以穷举。而由此所引伸出的显而易见的变化或变动仍处于本发明创造的保护范围之中。
Claims (10)
1.一种热障涂层,包括粘合层和第一陶瓷层,其特征在于:
还包括第二陶瓷层,所述第二陶瓷层设置于所述粘合层与所述第一陶瓷层之间;
所述第二陶瓷层的材质为氧化铝稳定氧化锆,所述第二陶瓷层中的氧化铝含量不高于30wt%,余量为氧化锆;
所述第一陶瓷层的材质为氧化钇稳定氧化锆,所述第一陶瓷层含6~9wt%的氧化钇,余量为氧化锆;
所述第一陶瓷层和所述第二陶瓷层中的氧化锆均具有四方晶系的晶体结构。
2.根据权利要求1所述的热障涂层,其特征在于,所述第一陶瓷层的厚度为0.1~0.5mm。
3.根据权利要求1或2所述的热障涂层,其特征在于,所述第二陶瓷层的厚度为3~10mm。
4.根据权利要求1-3任一项所述的热障涂层,其特征在于,还包括防腐蚀层,所述防腐蚀层设置于所述第二陶瓷层与所述粘合层之间。
5.根据权利要求4所述的热障涂层,其特征在于,所述防腐蚀层的材质为氧化铝。
6.根据权利要求4或5所述的热障涂层,其特征在于,所述防腐蚀层的厚度为10~15μm。
7.根据权利要求1-6任一项所述的热障涂层,其特征在于,所述粘合层的材质为MCrAlY,其中Cr的含量为25~35wt%、Al的含量为5~10wt%、Y的含量为1.1~1.5wt%、余量为M,且M为Ni、Fe或Co中的一种或多种。
8.根据权利要求1-7任一项所述的热障涂层,其特征在于,所述粘合层的厚度为30~100μm。
9.一种超高温悬浮床加氢冷壁反应器,包括反应器筒体,其特征在于:
所述反应器筒体包括顺次连接设置的外壳体、不锈钢堆焊层及权利要求1-8任一项所述的热障涂层,所述热障涂层中的粘合层紧贴所述不锈钢堆焊层设置。
10.根据权利要求9所述的超高温悬浮床加氢冷壁反应器,其特征在于,所述不锈钢堆焊层的厚度为4~7mm。
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