关于硫酸泵的材质
<P><FONT size=2>关于硫酸泵的材质选择,请各位指教?工况条件如下表:</FONT></P>0j(U7LO5^<P>L?e;nt m:~`V v K
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<TD> +[%o5Jl+oA!plH
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">硫酸循环泵</SPAN></P></TD>
<TD> [7kGIN8JY
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center><SPAN lang=EN-US style="FONT-SIZE: 10pt; mso-font-kerning: 0pt"><FONT face="Times New Roman">Q=<?xml:namespace prefix = st1 ns = "urn:schemas-microsoft-com<img src=" /><st1:chmetcnv UnitName="m3" SourceValue="12.5" HasSpace="False" Negative="False" NumberType="1" TCSC="0" w:st="on">12.5m3</st1:chmetcnv>/h H=<st1:chmetcnv UnitName="m" SourceValue="20" HasSpace="False" Negative="False" NumberType="1" TCSC="0" w:st="on">20m</st1:chmetcnv></FONT></SPAN><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">介质:</SPAN><SPAN lang=EN-US style="FONT-SIZE: 10pt; mso-font-kerning: 0pt"><FONT face="Times New Roman">90~95</FONT></SPAN><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">%硫酸</SPAN><SPAN style="FONT-SIZE: 10pt; mso-font-kerning: 0pt"><FONT face="Times New Roman"> </FONT></SPAN><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">进口压力:常压</SPAN><SPAN style="FONT-SIZE: 10pt; mso-font-kerning: 0pt"><FONT face="Times New Roman"> </FONT></SPAN><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">操作温度:</SPAN><st1:chmetcnv UnitName="℃" SourceValue="23" HasSpace="False" Negative="False" NumberType="1" TCSC="0" w:st="on"><SPAN lang=EN-US style="FONT-SIZE: 10pt; mso-font-kerning: 0pt"><FONT face="Times New Roman">23</FONT></SPAN><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">℃</SPAN></st1:chmetcnv><SPAN lang=EN-US style="FONT-SIZE: 10pt; mso-font-kerning: 0pt"><SPAN style="mso-spacerun: yes"><FONT face="Times New Roman"> </FONT></SPAN></SPAN><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">比重:</SPAN><FONT face="Times New Roman"><st1:chmetcnv UnitName="kg" SourceValue="1830" HasSpace="False" Negative="False" NumberType="1" TCSC="0" w:st="on"><SPAN lang=EN-US style="FONT-SIZE: 10pt; mso-font-kerning: 0pt">1830kg</SPAN></st1:chmetcnv><SPAN lang=EN-US style="FONT-SIZE: 10pt; mso-font-kerning: 0pt">/m3<SPAN style="mso-spacerun: yes"> </SPAN><?xml:namespace prefix = o ns = "urn:schemas-microsoft-com<img src=" /><o:p></o:p></SPAN></FONT></P></TD>0Q'[V4rWKsz
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<TD> L.i~ydG
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<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">材质是否合适<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P></TD></TR>
<TR bgColor=#f7f7f7> d^+` VOpsuS3y
<TD> (@!bn*Y7}z0`0H
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">浓硫酸泵</SPAN><SPAN lang=EN-US style="FONT-SIZE: 10pt; mso-font-kerning: 0pt"><o:p></o:p></SPAN></P></TD>
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<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center><SPAN lang=EN-US style="FONT-SIZE: 10pt; mso-font-kerning: 0pt"><FONT face="Times New Roman">Q=<st1:chmetcnv UnitName="m3" SourceValue="25" HasSpace="False" Negative="False" NumberType="1" TCSC="0" w:st="on">25m3</st1:chmetcnv>/h H=<st1:chmetcnv UnitName="m" SourceValue="32" HasSpace="False" Negative="False" NumberType="1" TCSC="0" w:st="on">32m</st1:chmetcnv></FONT></SPAN><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">介质:</SPAN><SPAN lang=EN-US style="FONT-SIZE: 10pt; mso-font-kerning: 0pt"><FONT face="Times New Roman">95~98</FONT></SPAN><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">%硫酸</SPAN><SPAN lang=EN-US style="FONT-SIZE: 10pt; mso-font-kerning: 0pt"><SPAN style="mso-spacerun: yes"><FONT face="Times New Roman"> </FONT></SPAN></SPAN><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">进口压力:常压</SPAN><SPAN style="FONT-SIZE: 10pt; mso-font-kerning: 0pt"><FONT face="Times New Roman"> </FONT></SPAN><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">操作温度:常温</SPAN><SPAN lang=EN-US style="FONT-SIZE: 10pt; mso-font-kerning: 0pt"><SPAN style="mso-spacerun: yes"><FONT face="Times New Roman"> </FONT></SPAN></SPAN><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">比重:</SPAN><FONT face="Times New Roman"><st1:chmetcnv UnitName="kg" SourceValue="1840" HasSpace="False" Negative="False" NumberType="1" TCSC="0" w:st="on"><SPAN lang=EN-US style="FONT-SIZE: 10pt; mso-font-kerning: 0pt">1840kg</SPAN></st1:chmetcnv><SPAN lang=EN-US style="FONT-SIZE: 10pt; mso-font-kerning: 0pt">/m3<SPAN style="mso-spacerun: yes"> </SPAN><o:p></o:p></SPAN></FONT></P></TD>
<TD> | jJKJ'N7_
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<P align=center> <SPAN lang=EN-US style="FONT-SIZE: 10pt; mso-font-kerning: 0pt"><FONT face="Times New Roman">306<o:p></o:p></FONT></SPAN></P>
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<P><FONT size=2></FONT> </P>
<P><FONT size=2>根据上表这两种泵各选什么材质更为合适?</FONT></P> 根据所给的工况条件,均属常温常压,只是酸浓度不同,可选用高硅铸铁或316L,98%的浓硫酸用普通铸铁也可以用,只是使用时间长短的问题。 高硅铸铁,耐酸不锈钢等
具体可参考
中国石化出版社 泵手册x%`,g/iH
工程材料手册 实际使用的情况:用铸铁比用316L等好,中学时的化学中已有分析。况且从价格来看:我几台铸铁的泵的使用寿命远大于一台316L的泵 呵呵!楼上的,你是想时时用新泵? 4楼说的有问题,对化工接触的少。一般化工厂的要求是要保证一个大修周期,铸铁泵你能保证的了吗?如果导致系统停车,你能负起这个责任吗?化工厂的采购或主管感冒这个风险吗? 也许#4的是一个老板,为了利益最大化,他就敢冒这个险。 对于 楼主提出的介质工况 来说。泵过流部件HT250要比316要好
对于浓度在70%以上,温度小于80度碳钢或铸铁有较好的耐腐蚀性(可以在泵体、叶轮表面形成一层氧化膜)。但不适用高速流动的硫酸。
同意4楼的说法。 #8说的有道理,我们单位98%的用的就是碳钢。检修、更换周期也挺理想的:handshake
回复 #1 lz-mdl 的帖子
我赞同YOYO的说法,对于高浓度的硫酸腐蚀性不是很强,铸铁或铸钢就可以了.前提是要考虑流速 <P>可以使用不锈钢材料</P> 楼上的也许不是化工单位的吧!单说不锈钢是没有用的,不锈钢是一个统称,里面细分很多的牌号,要根据输送不同的介质,选用不同牌号的不锈钢。 对于这个工况,铸铁和碳钢普遍被认为是一种材质,但根据我的经验,碳钢要比铸铁效果好很多,但一般不会选316之类的材质,价格贵不说,且使用效果并不比碳钢好,流速低固然好,但以上参数,我认为二级电机的泵检修周期达到一年是没问题的,有一点要注意,机械密封的冷却方案一定是PLAN 11的,静环一般不要选石墨的.