首页> 外国专利> Process for selectively removing and recovering Sulfur dioxide from gas containing Sulfur Dioxide, which comprises contacting the gas with a Buffered Solution of Malate; sodium and Process for the simultaneous removal of NOx and recovering Sulfur dioxide and sulfur dioxide.

Process for selectively removing and recovering Sulfur dioxide from gas containing Sulfur Dioxide, which comprises contacting the gas with a Buffered Solution of Malate; sodium and Process for the simultaneous removal of NOx and recovering Sulfur dioxide and sulfur dioxide.

机译：从含二氧化硫的气体中选择性除去和回收二氧化硫的方法，该方法包括使该气体与苹果酸缓冲溶液接触;钠和同时去除NOx并回收二氧化硫和二氧化硫的方法。

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摘要

This invention relates to processes for the selective removal of contaminants from effluent gases. More particularly, some embodiments of the present invention relate to selective removal and recovery of sulfur dioxide from effluent gases in a sulfur dioxide absorption/desorption process that utilizes a buffered aqueous absorption solution comprising certain weak inorganic or organic acids or salts thereof, preferably certain polyprotic carboxylic acids or salts thereof, to selectively absorb sulfur dioxide from the effluent gas. Oxidation inhibitors may be used. The absorbed sulfur dioxide is subsequently stripped to regenerate the absorption solution and produce a gas enriched in sulfur dioxide content. The regeneration of the absorption solution may include an integrated sulfur dioxide stripper and heat pump system to provide improved energy efficiency. Other embodiments of the present invention relate to a process for simultaneous removal of sulfur dioxide and nitrogen oxides (NO) from effluent gases and recovery of sulfur dioxide. The process utilizes a buffered aqueous absorption solution further including a metal chelate to absorb sulfur dioxide and NOfrom the gas and subsequently reducing the absorbed NOto form nitrogen. Still further, the present invention provides a process to control sulfate salt contaminant concentration in the absorption solution by partial crystallization and removal of the sulfate salt crystals.

机译：本发明涉及从废气中选择性除去污染物的方法。更具体地，本发明的一些实施方案涉及在二氧化硫吸收/解吸过程中从废气中选择性去除和回收二氧化硫，该方法利用包含某些弱无机或有机酸或其盐，优选某些多质子酸盐的缓冲水溶液吸收溶液。羧酸或其盐，以选择性地从废气中吸收二氧化硫。可以使用抗氧化剂。随后将吸收的二氧化硫汽提以再生吸收溶液并产生富含二氧化硫含量的气体。吸收溶液的再生可以包括集成的二氧化硫汽提器和热泵系统，以提供改进的能量效率。本发明的其他实施方案涉及同时从废气中除去二氧化硫和氮氧化物（NO）并回收二氧化硫的方法。该方法利用进一步包括金属螯合物的缓冲水溶液吸收溶液，以从气体中吸收二氧化硫和NO，并随后还原吸收的NO以形成氮。更进一步，本发明提供了一种通过部分结晶和除去硫酸盐晶体来控制吸收溶液中硫酸盐污染物浓度的方法。

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公开/公告号CL2013001144A1

专利类型
公开/公告日2013-11-15

原文格式PDF
申请/专利权人 MECS INC.;
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申请/专利号CL20130001144
发明设计人 VERA-CASTANEDA ERNESTO;
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申请日2013-04-26
分类号B01D53/14;
国家 CL
入库时间 2022-08-21 15:58:29

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