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	<title>Pulp and Paper Circle &#187; Evaporator scaling</title>
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	<link>http://pulpandpapercircle.com</link>
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		<title>Review of sodium salt scaling in the recovery cycle</title>
		<link>http://pulpandpapercircle.com/2008/10/review-of-sodium-salt-scaling-in-the-recovery-cycle/</link>
		<comments>http://pulpandpapercircle.com/2008/10/review-of-sodium-salt-scaling-in-the-recovery-cycle/#comments</comments>
		<pubDate>Mon, 13 Oct 2008 12:43:41 +0000</pubDate>
		<dc:creator>Roxare</dc:creator>
				<category><![CDATA[Evaporator scaling]]></category>
		<category><![CDATA[Sodium salts scaling]]></category>

		<guid isPermaLink="false">http://www.pulpandpapercircle.com/wordpress/?p=42</guid>
		<description><![CDATA[I have covered this subject under different postings in the past [March and April 2007]. However, this is an up to date review with some new information regarding the nature of scaling in black liquor evaporators [1]. Sodium salt scaling takes place in black liquor [BL] evaporators, smelt dissolving tanks and green liquor lines. Scaling [...]]]></description>
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		<slash:comments>2</slash:comments>
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		<title>Oxalate scaling</title>
		<link>http://pulpandpapercircle.com/2007/04/oxalate-scaling/</link>
		<comments>http://pulpandpapercircle.com/2007/04/oxalate-scaling/#comments</comments>
		<pubDate>Sun, 29 Apr 2007 15:53:32 +0000</pubDate>
		<dc:creator>Roxare</dc:creator>
				<category><![CDATA[Bleach plant scaling]]></category>
		<category><![CDATA[Evaporator scaling]]></category>

		<guid isPermaLink="false">http://www.pulpandpapercircle.com/wordpress/?p=14</guid>
		<description><![CDATA[In a kraft mill, large amounts of oxalate ions [C2O4]-2, are formed in oxygen delignification, as well as in the D, Z and, to a lesser extent, in the E and P stages in bleaching. In the bleach plant, CaC2O4 scales can form in the acid stage. CaC2O4 solubility depends on the concentration of the [...]]]></description>
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		<title>Calcium carbonate scaling</title>
		<link>http://pulpandpapercircle.com/2007/04/calcium-carbonate-scaling/</link>
		<comments>http://pulpandpapercircle.com/2007/04/calcium-carbonate-scaling/#comments</comments>
		<pubDate>Sat, 14 Apr 2007 20:06:17 +0000</pubDate>
		<dc:creator>Roxare</dc:creator>
				<category><![CDATA[Bleach plant scaling]]></category>
		<category><![CDATA[Evaporator scaling]]></category>

		<guid isPermaLink="false">http://www.pulpandpapercircle.com/wordpress/?p=13</guid>
		<description><![CDATA[Calcium contributes to scaling in various operations in a pulp and paper mill. CaCO3 is water insoluble, and has inverse solubility with temperature. Consequently, it forms on heat transfer surfaces such as digester heaters and black liquor evaporators. CaCO3 scales are also seasonal, and not easy to deal with. Calcium enters the mill through wood/ [...]]]></description>
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		<title>Scaling of sodium salts in black liquor evaporators</title>
		<link>http://pulpandpapercircle.com/2007/04/scaling-of-sodium-salts-in-black-liquor-evaporators/</link>
		<comments>http://pulpandpapercircle.com/2007/04/scaling-of-sodium-salts-in-black-liquor-evaporators/#comments</comments>
		<pubDate>Sun, 01 Apr 2007 14:30:52 +0000</pubDate>
		<dc:creator>Roxare</dc:creator>
				<category><![CDATA[Evaporator scaling]]></category>

		<guid isPermaLink="false">http://www.pulpandpapercircle.com/wordpress/?p=12</guid>
		<description><![CDATA[Another area in a kraft mill which suffers from solubility problems is the evaporation of black liquor. Evaporator scaling problems are mostly due to the precipitation of sodium salts. The two important components are sodium sulphate and sodium carbonate; they precipitate together to form a range of double salts, including burkeite (2Na2SO4.Na2CO3). Sodium carbonate is [...]]]></description>
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