CN104259203A - 燃煤电厂湿法脱硫用钛/钢复合板的制造方法 - Google Patents
燃煤电厂湿法脱硫用钛/钢复合板的制造方法 Download PDFInfo
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- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 title claims abstract description 49
- 239000010936 titanium Substances 0.000 title claims abstract description 49
- 229910052719 titanium Inorganic materials 0.000 title claims abstract description 49
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 37
- 239000010959 steel Substances 0.000 title claims abstract description 37
- 239000002131 composite material Substances 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 239000000758 substrate Substances 0.000 claims description 8
- 238000003466 welding Methods 0.000 claims description 7
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 4
- 239000010962 carbon steel Substances 0.000 claims description 4
- 150000001875 compounds Chemical class 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 abstract description 9
- 238000006748 scratching Methods 0.000 abstract description 2
- 230000002393 scratching effect Effects 0.000 abstract description 2
- 230000002093 peripheral effect Effects 0.000 abstract 2
- 238000005260 corrosion Methods 0.000 description 7
- 230000007797 corrosion Effects 0.000 description 6
- 238000006477 desulfuration reaction Methods 0.000 description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 230000023556 desulfurization Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 238000005253 cladding Methods 0.000 description 3
- 239000002360 explosive Substances 0.000 description 3
- 239000003546 flue gas Substances 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000011449 brick Substances 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 239000004570 mortar (masonry) Substances 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 229910001200 Ferrotitanium Inorganic materials 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/38—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling sheets of limited length, e.g. folded sheets, superimposed sheets, pack rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B47/00—Auxiliary arrangements, devices or methods in connection with rolling of multi-layer sheets of metal
- B21B47/02—Auxiliary arrangements, devices or methods in connection with rolling of multi-layer sheets of metal for folding sheets before rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/38—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling sheets of limited length, e.g. folded sheets, superimposed sheets, pack rolling
- B21B2001/386—Plates
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- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
本发明是用于生产燃煤电厂湿法脱硫用钛/钢复合板的方法，其层次结构依次为基板、钛板、钛板、基板及四周紧固钢板。四周间断式焊接紧固板不阻碍基板和复板在轧制时的自由延伸，保证板型平整，轧制时钛层在内侧，钢板在外侧避免划伤和钛层厚度的不均匀，也可轻松实现总厚度在5-10mm的燃煤电厂湿法脱硫用钛/钢复合板的生产，既保证了质量又保证了效率。
Description
技术领域
本发明专利是用来生产燃煤电厂湿法脱硫用钛/钢复合板的制造方法，其属于复合板制造领域。
背景技术
目前，燃煤电厂脱硫工艺有湿法脱硫、干法脱硫、半干湿法脱硫等，其中石膏-石灰石湿法脱硫工艺脱硫效率高、脱硫彻底，是应用最广的一种工艺方法。烟气经湿法脱硫后温度由140℃左右降低到40℃-80℃，烟气在烟囱口排放时，易凝结在烟囱内壁上，形成酸液，沿内壁下流，部分又被蒸发，造成内壁凝结液中酸度逐渐增大，由于烟气流动，腐蚀环境呈现动态，腐蚀环境随时更新，腐蚀性特强。采用耐酸胶泥、耐酸砖、耐硫酸露点腐蚀钢等，其防腐耐酸时间有限，不及时发现和处理，对混凝土烟囱外壁造成腐蚀后果严重。近期，大容量电站法定必须建立脱硫脱硝装置，多数电站采用钛/钢复合板，作为烟囱内筒抗腐蚀材料，其寿命是耐酸胶泥、耐酸砖、耐硫酸露点腐蚀钢的4～5倍，设计使用年限长达50年。
钛的一个显著特点是耐腐蚀性强，这是由于它对氧的亲合力特别大，能在其表面上生成一层致密的氧化膜，可保护钛不受介质腐蚀。金属钛在大多数水溶液中，都能在表面生成钝化氧化膜。因此，钛在酸性、碱性、中性盐水溶液中和氧化性介质中具有很好的稳定性，比现有的不锈钢和其它常用有色金属的耐腐蚀性都好，甚至可与铂比美。因此钛被大量用作各种防腐蚀领域、化学反应容器及热交换器材料，但缺点是成本较高。特别是作为结构部件使用时这个问题尤为突出。钛/钢复合板既有钛的耐蚀性，又有普通钢板作为结构件的强度和塑性，特别重要的是成本大幅度下降了，因此采用钛/钢复合板作为烟囱内衬的防腐材料具有很大的实用价值。
国内脱硫用烟囱内筒所用的钛/钢复合板大多是复层钛1.2mm，基层（碳钢）8～20mm，多采用单块爆炸制成复合坯料，再通过钢厂单块轧制成大面积超薄的钛/钢复合板，此方法存在以下几个问题：当板宽超过2500mm时板型不好，易存在边部钛层不均匀及剥落和板子中部拱起；由于钛/钢复合板特殊的加热温度和钢厂轧机设备的原因生产不了1.2+（4～6）mm的钛/钢复合板，（1.2+7）的钛/钢复合板即使能够轧制出来，板型质量不高、废品率增加、轧制费用增加40%；单块轧制工艺存在生产率低，钛表面暴露在外侧易划伤和局部烧损。
发明内容
本发明专利的目的在于克服以上不足，提供一种叠轧式组坯生产燃煤电厂湿法脱硫用钛/钢复合板的方法。
本发明专利的方案是，以炸药作为能源，爆炸焊接两块相同大小的钛/钢复合坯料，将复合后的两块坯料钛面相对，四周采用普通碳钢板间断式的焊接紧固，采用轧机将板坯轧制成所需厚度（两倍成品板的厚度）。
本发明专利的优点在于：板坯对称叠放轧制，避免当板宽超过2500mm时的中部拱起，同时轧辊接触的是碳钢层，可避免边部钛层不均匀及剥落现象；可生产出1.2+（4-7）的钛/钢复合板,在低成本的情况下解决传统方法无法解决的难题；采用双块同时轧制，极大地提高了生产率，相比原先方法单位时间内产量提高近50%。
附图说明
附图为本发明专利的结构示意图。
图中，1为基板，2为钛板，3为紧固钢板。
具体实施方式
本发明专利的层次结构依次为：基板1、钛板2、钛板2、基板1及环四周的紧固钢板。
其步骤为：
1、在复层钛板和基层钢板之间采用一定间隙，通过平行法的安装布置，实现大面积的连续焊接，并满足NB/T 47002.3-2009《压力容器用爆炸焊接复合板》标准的要求。
2、将爆炸完成的两块相同规格的钛钢复合板坯边部打磨平滑，并将复层钛面异物清理干净。
3、将两块钛/钢板坯钛面相对，保证上下两块板坯四周各面在一个平面上。
4、采用10×100×300mm的普通Q235B的钢板，四周间断紧固焊接。
5、轧制成两倍于成品板的厚度。
四周间断式焊接不阻碍基板和复板在轧制时的自由延伸，保证板型平整；轧制时钛层在内侧，钢板在外侧避免划伤和钛层厚度的不均匀；该方式可生产出超薄、超宽高质量的燃煤电厂湿法脱硫用钛/钢复合板。
Claims (4)
1.燃煤电厂湿法脱硫用钛/钢复合板的制造方法，其生产特征包括：层次结构依次为基板1、钛板2、钛板2、基板1及环四周的紧固钢板。
2.根据权利要求1所述的燃煤电厂湿法脱硫用钛/钢复合板的制造方法，其特征所述的基板是Q235B碳钢。
3.根据权利要求1所述的燃煤电厂湿法脱硫用钛/钢复合板的制造方法，其特征所述的复板板是TA2钛板。
4.根据权利要求1所述的燃煤电厂湿法脱硫用钛/钢复合板的制造方法，其特征所述的环四周的紧固钢板是采用电条电弧焊将紧固板间断式的均匀分布于板坯四周，在直角处紧固钢板是紧密相连的。
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108906898A (zh) * | 2018-06-08 | 2018-11-30 | 舞阳钢铁有限责任公司 | 一种烟囱用钢复合Ti板的生产方法 |
| CN110328231A (zh) * | 2019-04-26 | 2019-10-15 | 太原科技大学 | 易焊接复合板组坯的制造方法 |
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| GB899452A (en) * | 1960-01-12 | 1962-06-20 | United States Steel Corp | Method of making wide flat metal sheets |
| KR100411273B1 (ko) * | 1999-09-28 | 2003-12-18 | 주식회사 포스코 | 스테인레스강/티타늄 클래드재 제조방법 |
| CN2790654Y (zh) * | 2005-04-06 | 2006-06-28 | 吉欣（英德）热轧不锈复合钢有限公司 | 用于生产金属复合板的压制钎焊热轧复合坯 |
| CN101428389A (zh) * | 2008-11-21 | 2009-05-13 | 西安天力金属复合材料有限公司 | 一种薄型钛/钢复合板制备方法 |
| CN101474632A (zh) * | 2009-01-16 | 2009-07-08 | 辽宁新华阳伟业装备制造有限公司 | 压延复合锅具用钛钢复合板的制造方法 |
| CN102489506A (zh) * | 2011-12-04 | 2012-06-13 | 西北有色金属研究院 | 一种高性能薄复层钛/钢复合板的制备方法 |
| CN102773670A (zh) * | 2012-07-26 | 2012-11-14 | 李向民 | 一种钛-钢-钛双面复合板的制备方法 |
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2014
- 2014-08-15 CN CN201410401321.2A patent/CN104259203B/zh active Active
Patent Citations (7)
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| GB899452A (en) * | 1960-01-12 | 1962-06-20 | United States Steel Corp | Method of making wide flat metal sheets |
| KR100411273B1 (ko) * | 1999-09-28 | 2003-12-18 | 주식회사 포스코 | 스테인레스강/티타늄 클래드재 제조방법 |
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| CN101428389A (zh) * | 2008-11-21 | 2009-05-13 | 西安天力金属复合材料有限公司 | 一种薄型钛/钢复合板制备方法 |
| CN101474632A (zh) * | 2009-01-16 | 2009-07-08 | 辽宁新华阳伟业装备制造有限公司 | 压延复合锅具用钛钢复合板的制造方法 |
| CN102489506A (zh) * | 2011-12-04 | 2012-06-13 | 西北有色金属研究院 | 一种高性能薄复层钛/钢复合板的制备方法 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108906898A (zh) * | 2018-06-08 | 2018-11-30 | 舞阳钢铁有限责任公司 | 一种烟囱用钢复合Ti板的生产方法 |
| CN110328231A (zh) * | 2019-04-26 | 2019-10-15 | 太原科技大学 | 易焊接复合板组坯的制造方法 |
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Inventor after: Lv Lin Inventor after: Shi Hesheng Inventor before: Lv Lin Inventor before: Shi Hesheng Inventor before: Zhou Yi |
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Address after: 211803 No. 3 Lin He road, Star Industrial Park, Pukou District, Nanjing, Jiangsu Patentee after: Jiangsu run state new material Group Co., Ltd. Address before: 211803 No. 3 Lin He road, Star Industrial Park, Pukou District, Nanjing, Jiangsu Patentee before: Nanjing Runbang Metal Clad Material Co., Ltd. |
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Denomination of invention: Method for manufacturing titanium/steel composite boards for wet desulphurization in coal-fired power plants Effective date of registration: 20200615 Granted publication date: 20160525 Pledgee: Tangquan sub branch of Jiangsu Zijin Rural Commercial Bank Co., Ltd Pledgor: JIANGSU RUNBANG NEW MATERIAL GROUP Co.,Ltd. Registration number: Y2020980003078 |
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Date of cancellation: 20210917 Granted publication date: 20160525 Pledgee: Tangquan sub branch of Jiangsu Zijin Rural Commercial Bank Co., Ltd Pledgor: JIANGSU RUNBANG NEW MATERIAL GROUP Co.,Ltd. Registration number: Y2020980003078 |