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1. 发明申请

WO9816462A9 TREATMENT OF CHLORINE DIOXIDE GENERATOR EFFLUENT AND FEED STREAMS WITH FIXED-RESIN BED 审中-公开
标题翻译：二氧化氯发生器液体和固定树脂进料流的处理
公开(公告)号：WO9816462A9
公开(公告)日：1999-04-01
申请号：PCT/CA9700750
申请日：1997-10-09
申请人： PULP PAPER RES INST , ECO TEC , PALEOLOGOU MICHAEL , THOMPSON ROKHSAREH , BROWN CRAIG J , SHEEDY MICHAEL
发明人： PALEOLOGOU MICHAEL , THOMPSON ROKHSAREH , BROWN CRAIG J , SHEEDY MICHAEL
IPC分类号： B09B3/00 , B01J39/04 , C01B11/02 , C01B17/90 , C01D5/16 , C02F1/44 , D21C9/14
CPC分类号： C01B17/904 , C01B11/023 , C01D5/16 , Y10S423/14
摘要： A process employing a fixed-resin bed Acid Retardation Unit (ARU) to separate spent acid from chlorine dioxide generators into a de-acidified sodium sulfate component and a purified sulfuric acid component. The de-acidified sodium sulfate produced is returned to the chemical recovery cycle of the kraft mill in place of acidic chlorine dioxide generator effluent thereby avoiding the destruction of alkalinity in pulp mill liquors. In addition, sulfuric acid is purified providing an opportunity for reuse in various mill applications, and/or concentrated and recycled to the generator. Alternatively, to avoid high evaporation costs, the purified acid can be used to regenerate a cation-exchange unit (CEU) used in the conversion of sodium chlorate to a sodium chlorate/chloric acid mixture which is fed to the generator in place of sodium chlorate and sulfuric acid. Using this approach, the sulfuric acid requirement of chlorine dioxide generators and, in turn, the amount of acidic generator effluent can be reduced. The process is applicable to both atmospheric and subatmospheric chlorine dioxide generators. In the latter case, the concentration of the purified sulfuric acid from the ARU or any other acid separation system can be increased by using a portion of it to dissolve the sodium sesquisulfate by-product from such generators.
摘要翻译：一种使用固定树脂床酸延迟单元（ARU）将废酸从二氧化氯发生器分离成脱酸的硫酸钠组分和纯化的硫酸组分的方法。所产生的脱酸硫酸钠返回到牛皮纸磨机的化学回收循环，代替酸性二氧化氯发生器流出物，从而避免纸浆厂液中碱度的破坏。此外，纯化硫酸提供了在各种研磨应用中再利用的机会，和/或浓缩并再循环到发生器中。或者，为了避免高的蒸发成本，可以使用纯化的酸来再生用于将氯酸钠转化成氯酸钠/氯酸混合物的阳离子交换单元（CEU），该氯酸钠/氯酸混合物被供给到发生器代替氯酸钠和硫酸。使用这种方法，可以减少二氧化氯发生器的硫酸需求，进而降低酸性发生器流出物的量。该方法适用于大气和低气压的二氧化氯发生器。在后一种情况下，来自ARU或任何其它酸分离系统的纯化硫酸的浓度可以通过使用其一部分来从这种发生器中溶解倍半硫酸钠副产物而增加。

2. 发明申请

WO1998016462A1 TREATMENT OF CHLORINE DIOXIDE GENERATOR EFFLUENT AND FEED STREAMS WITH FIXED-RESIN BED 审中-公开
标题翻译：二氧化氯发生器液体和固定树脂进料流的处理
公开(公告)号：WO1998016462A1
公开(公告)日：1998-04-23
申请号：PCT/CA1997000750
申请日：1997-10-09
申请人： PULP AND PAPER RESEARCH INSTITUTE OF CANADA , ECO-TEC LIMITED , PALEOLOGOU, Michael , THOMPSON, Rokhsareh , BROWN, Craig, J. , SHEEDY, Michael
发明人： PULP AND PAPER RESEARCH INSTITUTE OF CANADA , ECO-TEC LIMITED
IPC分类号： C01B11/02
CPC分类号： C01B17/904 , C01B11/023 , C01D5/16 , Y10S423/14
摘要： A process employing a fixed-resin bed Acid Retardation Unit (ARU) to separate spent acid from chlorine dioxide generators into a de-acidified sodium sulfate component and a purified sulfuric acid component. The de-acidified sodium sulfate produced is returned to the chemical recovery cycle of the kraft mill in place of acidic chlorine dioxide generator effluent thereby avoiding the destruction of alkalinity in pulp mill liquors. In addition, sulfuric acid is purified providing an opportunity for reuse in various mill applications, and/or concentrated and recycled to the generator. Alternatively, to avoid high evaporation costs, the purified acid can be used to regenerate a cation-exchange unit (CEU) used in the conversion of sodium chlorate to a sodium chlorate/chloric acid mixture which is fed to the generator in place of sodium chlorate and sulfuric acid. Using this approach, the sulfuric acid requirement of chlorine dioxide generators and, in turn, the amount of acidic generator effluent can be reduced. The process is applicable to both atmospheric and subatmospheric chlorine dioxide generators. In the latter case, the concentration of the purified sulfuric acid from the ARU or any other acid separation system can be increased by using a portion of it to dissolve the sodium sesquisulfate by-product from such generators.
摘要翻译：一种使用固定树脂床酸延迟单元（ARU）将废酸从二氧化氯发生器分离成脱酸的硫酸钠组分和纯化的硫酸组分的方法。所产生的脱酸硫酸钠返回到牛皮纸磨机的化学回收循环，代替酸性二氧化氯发生器流出物，从而避免纸浆厂液中碱度的破坏。此外，纯化硫酸提供了在各种研磨应用中再利用的机会，和/或浓缩并再循环到发生器中。或者，为了避免高的蒸发成本，可以使用纯化的酸来再生用于将氯酸钠转化成氯酸钠/氯酸混合物的阳离子交换单元（CEU），该氯酸钠/氯酸混合物被供给发生器代替氯酸钠和硫酸。使用这种方法，可以减少二氧化氯发生器的硫酸需求，进而降低酸性发生器流出物的量。该方法适用于大气和低气压的二氧化氯发生器。在后一种情况下，来自ARU或任何其它酸分离系统的纯化硫酸的浓度可以通过使用其一部分来从这种发生器中溶解倍半硫酸钠副产物而增加。

3. 发明申请

WO2006012728A1 METHOD AND APPARATUS FOR INCREASING FILTER CONTAMINANT LOADING CAPACITY 审中-公开
标题翻译：用于增加过滤器污染物装载能力的方法和装置
公开(公告)号：WO2006012728A1
公开(公告)日：2006-02-09
申请号：PCT/CA2005/001042
申请日：2005-07-04
申请人： ECO-TEC LIMITED , BROWN, Craig, J. , SHEEDY, Michael, A.
发明人： BROWN, Craig, J. , SHEEDY, Michael, A.
IPC分类号： B01D24/46
CPC分类号： B01D24/007 , B01D24/4631
摘要： The filter contaminant loading capacity of a depth granular media filter is increased by imposing a so-called "back-slip" on the filter bed. At intervals between normal backwashing, a volume of liquid is passed upwardly through the media bed under flow conditions selected to displace at least some of the contaminants upwardly in the bed while essentially removing none of the contaminants from the filter vessel. Preferably, the filter bed comprises at least two media types of different but uniform particle sizes and densities, the media types each forming a distinct layer in which the effective particle size of the media in each successive layer decreases in a downward direction in the vessel.
摘要翻译：通过在过滤床上施加所谓的“反滑”来增加深度颗粒状介质过滤器的过滤器污染物负载能力。在正常回洗之间的间隔，一定体积的液体在流动条件下向上通过介质床，所述流动条件被选择为在床中向上移动至少一些污染物，同时基本上从过滤器容器中除去任何污染物。优选地，过滤床包括不同但均匀的粒度和密度的至少两种介质类型，所述介质类型各自形成不同的层，其中每个连续层中的介质的有效粒度在容器中沿向下的方向减小。

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