首页> 外国专利> PROCESS FOR THE REMOVAL OF NOX AND SOX FROM GAS STREAMS USING A WATER-SOLUBLE,POLYMERIC CHELATE OF A POLYVALENT METAL AND MEMBRANE SEPARATION MEANS

PROCESS FOR THE REMOVAL OF NOX AND SOX FROM GAS STREAMS USING A WATER-SOLUBLE,POLYMERIC CHELATE OF A POLYVALENT METAL AND MEMBRANE SEPARATION MEANS

机译:用水溶性金属多金属螯合物和膜分离装置从煤气中脱除NOx和SOx的方法

摘要

The invention is a cyclic proces for removing NOx and SOx from a gas stream. The gas stream is scrubbed with an aqueous reaction solution containing an organic, water-soluble, polymeric chelate containing a polyvalent metal ion. The NOx is absorbed and in the presence of SOx, the imidodisulfonate is formed. The aqueous reaction solution containing chelate and imidodisulfonate is contacted with a first separation membrane, wherein calcium oxide is added to the first permeate stream, resulting in the precipitation of calcium sulfite. The calcium sulfite is filtered from the first permeate stream, the first permeate stream combined with the first non-permeate stream, and the combined stream contacted with a second separation membrane which removes a portion of the water and other low molecular weight materials. The remaining non-permeate stream containing chelate is recycled to the scrubber. Water-soluble alkali is added to the process as needed.
机译:本发明是用于从气流中去除NO x和SO x的循环过程。用含水反应溶液洗涤气流,该含水反应溶液包含有机,水溶性,包含多价金属离子的聚合物螯合物。 NOx被吸收,在SOx的存在下,形成亚氨基二磺酸盐。使包含螯合物和亚氨基二磺酸盐的反应水溶液与第一分离膜接触,其中将氧化钙添加到第一渗透物流中,导致亚硫酸钙沉淀。从第一渗透物流中过滤亚硫酸钙,将第一渗透物流与第一非渗透物流合并,并将合并的物流与第二分离膜接触,该第二分离膜除去一部分水和其他低分子量物质。剩余的含有螯合物的非渗透物流被循环到洗涤器中。根据需要将水溶性碱添加到该过程中。

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