CN107354423A - 涂覆铁基非晶金属涂层的火电厂锅炉水冷壁 - Google Patents

涂覆铁基非晶金属涂层的火电厂锅炉水冷壁 Download PDF

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CN107354423A
CN107354423A CN201710567493.0A CN201710567493A CN107354423A CN 107354423 A CN107354423 A CN 107354423A CN 201710567493 A CN201710567493 A CN 201710567493A CN 107354423 A CN107354423 A CN 107354423A
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water
coating
power plant
amorphous metal
thermal power
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邢佑印
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    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
    • C23C4/131—Wire arc spraying
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
    • C23C4/06—Metallic material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B37/00—Component parts or details of steam boilers
    • F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
    • F22B37/10—Water tubes; Accessories therefor
    • F22B37/107—Protection of water tubes
    • F22B37/108—Protection of water tube walls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
    • F23M5/00—Casings; Linings; Walls
    • F23M5/08—Cooling thereof; Tube walls

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Plasma & Fusion (AREA)
  • Materials Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Thermal Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Coating By Spraying Or Casting (AREA)

Abstract

本发明提供涂覆铁基非晶金属涂层的火电厂锅炉水冷壁，其技术方案为：采用金刚砂或同等硬度砂石对水冷壁表面进行喷砂毛化处理，去除氧化层和附着物，粗糙度达到Sa12.5微米。采用超音速电弧喷涂技术喷涂非晶合金材料，喷涂厚度为0.3mm。本发明的有益效果：本发明设计合理实用，有效的减轻了对锅炉的磨损，省时省力，提高了锅炉使用寿命3倍以上，适合普遍推广使用。

Description

涂覆铁基非晶金属涂层的火电厂锅炉水冷壁
技术领域
本发明涉及设备涂层技术领域，尤其是涂覆铁基非晶金属涂层的火电厂锅炉水冷壁。
背景技术
锅炉水冷壁由多个厚度为7mm碳钢管焊接而成，连为一体，安装在锅炉四周各部位，将锅炉燃烧产生的热能传导给水，并将水由液体转变为高温水蒸气，然后水蒸气驱动蒸汽轮机发电。由于煤质不同，部分煤高温燃烧后会产生一些胶质物，这些胶质物积累到一定程度形成厚度不等的堆积物附着在水冷壁上面，产生热防护现象，影响锅炉发热效率，造成能源浪费。为了充分燃烧，煤粉通过强风吹送到锅炉内，对水冷壁产生磨损，加上煤粉燃烧产生的硫化物腐蚀，造成水冷壁管减薄，减薄到一定程度后不能承受内部水蒸气压力，就会出现爆管现象，锅炉不得不停炉检修，造成巨大经济损失。
现有水冷壁管大多采用硬质合金对其进行涂层防护。由于锅炉结构不同、煤质不同，防护效果不同，一般锅炉水冷壁喷涂周期为6到12个月。循环流化床锅炉大多燃烧煤矸石等劣质煤，颗粒较大，为了充分燃烧，炉内风量更大，磨损更严重，有的锅炉需要3个月进行一次喷涂防护。
发明内容
本发明经多年实践提供最先进的技术，是把美国LMC公司的铁基非晶合金涂覆到水冷壁表面上，解决水冷壁减薄速度快、寿命短的问题。非晶合金又称为液态金属，是指材料在固态条件下保留了金属在液态状况下原子的三维空间无序排列，也就是金属没有了固有的晶界，由于晶界的消失，和传统合金比较，非晶合金的耐腐蚀性、硬度和韧性大大增强，美国LiquidMetal Coating LLC公司(简称LMC)是该材料在全球该领域的领军企业。
本发明的目的是通过以下技术方案实现的：采用金刚砂或同等硬度砂石对水冷壁表面进行喷砂毛化处理，去除氧化层和附着物，粗糙度达到Sa12.5微米。采用超音速电弧喷涂技术喷涂非晶合金材料，喷涂厚度为0.3mm。
本发明的有益效果：本发明设计合理实用，有效的减轻了对锅炉的磨损，省时省力，提高了锅炉使用寿命3倍以上，适合普遍推广使用。
说明书附图
图1为本发明水冷壁喷砂毛化后效果图，
图2为本发明水冷壁涂覆非晶合金后效果图。
具体实施方式
如图1和图2所示，涂覆铁基非晶金属涂层的火电厂锅炉水冷壁，采用金刚砂或同等硬度砂石对水冷壁表面进行喷砂毛化处理，去除氧化层和附着物，粗糙度达到Sa12.5微米。采用超音速电弧喷涂技术喷涂非晶合金材料，喷涂厚度为0.3mm。
实施例1：
1、对水冷壁进行喷砂毛化处理，粗糙度达到Sa10.5微米。
2、采用超音速电弧喷涂技术喷涂非晶合金材料，喷涂厚度为0.2mm。
3、涂层喷涂后自然干燥，或者高温干燥，使其固化，然后再高温运行。
实施例2：
1、对水冷壁进行喷砂毛化处理，粗糙度达到Sa12.5微米。
2、采用超音速电弧喷涂技术喷涂非晶合金材料，喷涂厚度为0.3mm。
3、涂层喷涂后自然干燥，或者高温干燥，使其固化，然后再高温运行。
实施例3：
1、对水冷壁进行喷砂毛化处理，粗糙度达到Sa14.5微米。
2、使用高压空气将纳米陶瓷材料喷涂在水冷壁表面，喷涂厚度为0.5mm。
3、涂层喷涂后自然干燥，或者高温干燥，使其固化，然后再高温运行。

Claims (2)

1.涂覆铁基非晶金属涂层的火电厂锅炉水冷壁，其特征在于：采用金刚砂或同等硬度砂石对水冷壁表面进行喷砂毛化处理，去除氧化层和附着物，粗糙度达到Sa12.5微米。
2.根据权利要求1所述的涂覆铁基非晶金属涂层的火电厂锅炉水冷壁，其特征在于：采用超音速电弧喷涂技术喷涂非晶合金材料，喷涂厚度为0.3mm。
CN201710567493.0A 2017-07-12 2017-07-12 涂覆铁基非晶金属涂层的火电厂锅炉水冷壁 Pending CN107354423A (zh)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115261769A (zh) * 2022-08-09 2022-11-01 山东汉思非晶材料科技有限公司 一种锅炉水冷壁管防护用复合涂层及其制备方法
CN117259630A (zh) * 2023-09-28 2023-12-22 太仓申星锻造有限公司 一种膜式水冷壁密封锻件成型工艺

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105256259A (zh) * 2015-11-05 2016-01-20 西安创亿能源科技有限公司 一种高热稳定性铁基非晶涂层及其制备方法
CN106191749A (zh) * 2016-07-21 2016-12-07 南京电力设备质量性能检验中心 优化的锅炉水冷壁防高温硫腐蚀喷涂工艺

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105256259A (zh) * 2015-11-05 2016-01-20 西安创亿能源科技有限公司 一种高热稳定性铁基非晶涂层及其制备方法
CN106191749A (zh) * 2016-07-21 2016-12-07 南京电力设备质量性能检验中心 优化的锅炉水冷壁防高温硫腐蚀喷涂工艺

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115261769A (zh) * 2022-08-09 2022-11-01 山东汉思非晶材料科技有限公司 一种锅炉水冷壁管防护用复合涂层及其制备方法
CN117259630A (zh) * 2023-09-28 2023-12-22 太仓申星锻造有限公司 一种膜式水冷壁密封锻件成型工艺

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