CN108516844B - 磷炉尾气燃烧产生高温下的防腐蚀材料 - Google Patents
磷炉尾气燃烧产生高温下的防腐蚀材料 Download PDFInfo
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- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 16
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 16
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/06—Aluminous cements
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- C—CHEMISTRY; METALLURGY
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- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00482—Coating or impregnation materials
- C04B2111/00551—Refractory coatings, e.g. for tamping
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3427—Silicates other than clay, e.g. water glass
Abstract
本发明公开了一种磷炉尾气燃烧产生高温下的防腐蚀材料,磷炉尾气的强腐蚀性使得其应用受到了很大限制,本发明采用以下原料:脱水剂或快干剂5—7%,耐火泥8—12%,高铝水泥20—40%,0.1至5mm镁铬耐火砖骨料35—45%,耐高温防腐溶液10—20%。该耐高温及腐蚀的材料具有耐久性、附着力强、抗高温下腐蚀等优点;将该材料涂覆于蒸汽锅炉炉壁及换热管,有效避免炉壁及换热管直接与高温烟气接触,而被燃烧黄磷尾气产生的腐蚀性气体腐蚀,可在950℃以上高温下对锅炉炉壁及换热管进行有效的防腐蚀保护,大大延长了蒸汽发生装置的使用寿命。
Description
技术领域
本发明涉及磷化工材料技术领域,特别涉及一种能耐受黄磷尾气高温及腐蚀的材料。
背景技术
电炉法生产黄磷过程中产生大量的黄磷尾气,生产1吨黄磷约产生黄磷尾气2500-3000m3,尾气中含82-95%的CO,热值很高,可以作为燃料用。传统的黄磷尾气燃烧利用锅炉主要是将燃烧器布置在炉膛内,炉膛由炉胆及其受热面或传热水冷壁组成。当含有可燃成分的黄磷尾气进入炉膛后,在燃烧器的作用下与空气进行混合燃烧,产生高温烟气,高温烟气对炉膛传热水冷壁或炉胆受热面放热,使热量传入到有用的锅炉介质中,锅炉介质一般为蒸汽或者热水,最后将携带热量的介质输往使用单元。被带走热量的烟气经除尘处理后,通过排烟系统排入大气。这种黄磷尾气燃烧利用锅炉由于黄磷尾气含有大量的水蒸气、P、S、砷化物、氟化物等腐蚀性物质,这些物质在炉膛内不能完全燃烧,尤其是一些固体腐蚀性杂质被烟气吹散后黏贴在炉膛受热面或炉膛水冷壁上,形成结垢,对锅炉受热面形成垢下腐蚀,缩短了锅炉的使用寿命。
同时,炉内燃烧温度越高,则炉内原子氧的浓度越高,将有更多的SO2转换为SO3,也会增强对设备的腐蚀,甚至国内某锅炉企业生产的燃烧黄磷尾气的锅炉在使用后一个月不到就全部报废。而且由于黄磷尾气燃烧后的物质腐蚀性强,锅炉换热面经常需要进行检修,甚至更换,而更换又需要整体进行拆卸更换,非常麻烦,有的管段并没有损坏也要连同其他一起更换,造成了浪费。
现有技术有直接将高耐腐蚀的不锈钢材料用于锅炉,但也避免不了结垢和腐蚀。锅炉运行中一但有点腐蚀,一根受热管子就会在短短十几个小时内穿孔爆管,造成被迫停炉。为此,研发一种在高温时既有良好的导热性,又能保证腐蚀性物质不腐蚀的材料是解决上述问题的关键。
发明内容
为了克服现有技术的上述缺点,本发明提供一种能够抵抗高温环境中腐蚀的磷炉尾气燃烧产生高温下的防腐蚀材料。
为达到上述目的,本发明采用以下技术手段:一种磷炉尾气燃烧产生高温下的防腐蚀材料,其原料组分及重量百分比如下:脱水剂或快干剂5—7%,耐火泥8—12%,高铝水泥20—40%,0.1至5mm镁铬耐火砖骨料35—45%,耐高温防腐溶液10—20%。所述耐高温防腐溶液是指磷酸和水玻璃的混合溶液,水玻璃为硅酸钠溶于水后形成的粘稠溶液,磷酸和水玻璃的重量配比按1:1,混合溶液中硅酸含量为46%。所述快干剂为水泥快干剂。
优选的,其原料组分及重量百分比如下:脱水剂或快干剂5%,耐火泥10%,高铝水泥30%,0.1至5mm镁铬耐火砖骨料40%,耐高温防腐溶液15%。
所述耐火泥由耐火粉料、结合剂和外加剂组成,采用粒度小于1mm的普通耐火材料。
所述高铝水泥是以铝矾土和石灰为原料,按一定比例配制,经煅烧、磨细所制得的一种以铝酸盐为主要矿物成分的水硬性胶凝材料,又称铝酸盐水泥。是一种快硬、高强、耐热及耐腐蚀的胶凝材料,主要特性有早期强度高、附高温和耐腐蚀。本发明采用标号为525的高铝水泥。
该磷炉尾气燃烧产生高温下的防腐蚀材料的制备方法是:①将镁铬耐火砖破碎为粒径为0.1至5mm的颗粒骨料。②将上述各原材料按比例与耐高温防腐溶液混合后搅拌均匀,得磷炉尾气燃烧产生高温下的防腐蚀材料。③将磷炉尾气燃烧产生高温下的防腐蚀材料涂覆于蒸汽锅炉炉壁及换热管上,涂覆厚度为15—25mm。
有益效果:本发明磷炉尾气燃烧产生高温下的防腐蚀材料是专门为黄磷生产企业设计生产的,可以发挥相适配的材料的优点,具有耐久性、附着力强、抗高温下腐蚀等优点;将该材料涂覆于蒸汽锅炉炉壁及换热管,有效避免炉壁及换热管直接与高温烟气接触,而被燃烧黄磷尾气产生的腐蚀性气体腐蚀,可在950℃以上高温下对锅炉炉壁及换热管进行有效的防腐蚀保护,大大延长了蒸汽发生装置的使用寿命,解决了可燃气体中含有腐蚀性物质燃烧热量无法回收的难题。
具体实施方式
下面结合实施例对本发明进一步说明。
实施例1:一种磷炉尾气燃烧产生高温下的防腐蚀材料,其原料组分及重量百分比如下:水泥快干剂5%,粒度小于1mm的耐火泥10%,525高铝水泥30%,0.1至5mm镁铬耐火砖骨料40%,耐高温防腐溶液15%,所述耐高温防腐溶液是指磷酸和水玻璃的混合溶液,水玻璃为硅酸钠溶于水后形成的粘稠溶液,磷酸和水玻璃的重量配比按1:1,混合溶液中硅酸含量为46%。
该磷炉尾气燃烧产生高温下的防腐蚀材料的制备方法是:①将镁铬耐火砖破碎为粒径为0.1至5mm的颗粒骨料。②将上述各原材料按比例与耐高温防腐溶液混合后搅拌均匀,得磷炉尾气燃烧产生高温下的防腐蚀材料。③将磷炉尾气燃烧产生高温下的防腐蚀材料涂覆于蒸汽锅炉炉壁及换热管,涂覆厚度为20mm。
实施例2:一种磷炉尾气燃烧产生高温下的防腐蚀材料,其原料组分及重量百分比如下:脱水剂5%,粒度小于1mm的耐火泥8%,525高铝水泥40%,0.1至5mm镁铬耐火砖骨料35%,耐高温防腐溶液12%,所述耐高温防腐溶液是指磷酸和水玻璃的混合溶液,水玻璃为硅酸钠溶于水后形成的粘稠溶液,磷酸和水玻璃的重量配比按1:1,混合溶液中硅酸含量为46%。
制备方法同实施例1。
实施例3:一种磷炉尾气燃烧产生高温下的防腐蚀材料,其原料组分及重量百分比如下:水泥快干剂7%,粒度小于1mm的耐火泥12%,高铝水泥20%,0.1至5mm镁铬耐火砖骨料45%,耐高温防腐溶液16%。
制备方法同实施例1。
Claims (4)
1.一种磷炉尾气燃烧产生高温下的防腐蚀材料,其特征在于,其原料组分及重量百分比如下:脱水剂或快干剂5—7%,耐火泥8—12%,高铝水泥20—40%,0.1至5mm镁铬耐火砖骨料35—45%,耐高温防腐溶液10—20%;所述耐高温防腐溶液是指磷酸和水玻璃的混合溶液,水玻璃为硅酸钠溶于水后形成的粘稠溶液,磷酸和水玻璃的重量配比按1:1,混合溶液中硅酸含量为46%;所述快干剂为水泥快干剂;
该磷炉尾气燃烧产生高温下的防腐蚀材料的制备方法是:①将镁铬耐火砖破碎为粒径为0.1至5mm的颗粒骨料;②将上述各原材料按比例与耐高温防腐溶液混合后搅拌均匀,得磷炉尾气燃烧产生高温下的防腐蚀材料;③将磷炉尾气燃烧产生高温下的防腐蚀材料涂覆于蒸汽锅炉炉壁及换热管,涂覆厚度为15—25mm。
2.根据权利要求1所述的磷炉尾气燃烧产生高温下的防腐蚀材料,其特征在于,其原料组分及重量百分比如下:脱水剂或快干剂5%,耐火泥10%,高铝水泥30%,0.1至5mm镁铬耐火砖骨料40%,耐高温防腐溶液15%。
3.根据权利要求1或2所述的磷炉尾气燃烧产生高温下的防腐蚀材料,其特征在于,所述耐火泥采用粒度小于1mm的普通耐火材料。
4.根据权利要求1或2所述的磷炉尾气燃烧产生高温下的防腐蚀材料,其特征在于,所述高铝水泥采用525。
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US3430940A (en) * | 1967-11-08 | 1969-03-04 | Dresser Ind | Refractory coated composite oxygen lance |
CN101693388A (zh) * | 2009-10-16 | 2010-04-14 | 湖南华菱涟源钢铁有限公司 | 一种使用消失模浇注高炉送风装置内衬的方法 |
CN102276223A (zh) * | 2011-06-03 | 2011-12-14 | 河南中隆科技有限责任公司 | 新型柔性耐磨陶瓷涂料及其制备方法 |
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