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公开(公告)号：US10406452B2
公开(公告)日：2019-09-10
申请号：US13978320
申请日：2012-01-03
IPC分类号： B01D9/00
摘要： The invention is directed to an improvement in operation of wash columns, and more in particular to an apparatus for separating solid particles from a slurry and to a process for separating solid particles from a mother liquor slurry. The apparatus of the invention comprises a wash column (1), which comprises a melting circuit (8,10,11,21), wherein means (22,23) are present to introduce a compound or composition to said wash column between a wash front (6b) formed in said wash column in operation and a product outlet and/or in the melting circuit. The process of the invention comprises separating the liquid from the solid particles by filtration with the aid of at least one filtering element (4), while a packed bed of solid particles coming from the mother liquid slurry forms near said filtering element (4), and wherein a wash front (6b) forms which is obtained by bringing a washing liquid in counter current to the solid particles in the bed, the bed being subjected to a movement in the direction of said wash front (6b), while a product stream comprising the material of said solid particles is obtained by continuously discharging a portion of said washing liquid, wherein a portion of said bed is continuously disintegrated, characterized in that a compound or composition is introduced into said wash column (1) between the wash front (6b) and a product outlet and/or in a melting circuit (8,10,11,21), and wherein the introduction of the said compound or composition decreases the equilibrium temperature of the contents of the melting circuit (8,10,11,21), further characterized by the feature that the introduced compound or composition is completely miscible with the product suspension and/or molten product being present in the said melting circuit (8,10,11,21).
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公开(公告)号：US20140042108A1
公开(公告)日：2014-02-13
申请号：US13978320
申请日：2012-01-03
IPC分类号： B01D9/00
CPC分类号： B01D9/00 , B01D9/0045 , B01D9/005
摘要： The invention is directed to an improvement in operation of wash columns, and more in particular to an apparatus for separating solid particles from a slurry and to a process for separating solid particles from a mother liquor slurry. The apparatus of the invention comprises a wash column (1), which comprises a melting circuit (8,10,11,21), wherein means (22,23) are present to introduce a compound or composition to said wash column between a wash front (6b) formed in said wash column in operation and a product outlet and/or in the melting circuit. The process of the invention comprises separating the liquid from the solid particles by filtration with the aid of at least one filtering element (4), while a packed bed of solid particles coming from the mother liquid slurry forms near said filtering element (4), and wherein a wash front (6b) forms which is obtained by bringing a washing liquid in counter current to the solid particles in the bed, the bed being subjected to a movement in the direction of said wash front (6b), while a product stream comprising the material of said solid particles is obtained by continuously discharging a portion of said washing liquid, wherein a portion of said bed is continuously disintegrated, characterized in that a compound or composition is introduced into said wash column (1) between the wash front (6b) and a product outlet and/or in a melting circuit (8,10,11,21), and wherein the introduction of the said compound or composition decreases the equilibrium temperature of the contents of the melting circuit (8,10,11,21), further characterized by the feature that the introduced compound or composition is completely miscible with the product suspension and/or molten product being present in the said melting circuit (8,10,11,21).
摘要翻译： 本发明涉及洗涤塔的操作的改进，更具体地涉及用于从浆料中分离固体颗粒的装置以及从母液浆液中分离固体颗粒的方法。 本发明的装置包括洗涤塔（1），其包括熔化回路（8,10,11,21），其中存在用于将化合物或组合物引入所述洗涤塔的洗涤剂（22,23） 在操作中在所述洗涤塔中形成的前部（6b）和产品出口和/或在熔解回路中。 本发明的方法包括借助于至少一个过滤元件（4）过滤分离液体与固体颗粒，同时来自母液浆料的固体颗粒的填充床形成在所述过滤元件（4）附近， 并且其中形成洗涤前部（6b），其通过使洗涤液与所述床中的固体颗粒相反地使洗涤液沿所述洗涤前部（6b）的方向移动，同时产物流 包括所述固体颗粒的材料是通过连续排出所述洗涤液的一部分获得的，其中所述床的一部分被连续分解，其特征在于将化合物或组合物引入所述洗涤塔（1） 6b）和产品出口和/或在熔解回路（8,10,11,21）中，并且其中所述化合物或组合物的引入降低了熔融物的内容物的平衡温度 g电路（8,10,11,21），其特征还在于引入的化合物或组合物与存在于所述熔解回路中的产物悬浮液和/或熔融产物完全混溶的特征（8,10,11,21 ）。
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公开(公告)号：US20130287666A1
公开(公告)日：2013-10-31
申请号：US13976282
申请日：2012-01-03
IPC分类号： C01B25/234
CPC分类号： C01B25/234 , B01D9/0045
摘要： Process for purifying a stream comprising phosphoric acid and a first amount of impurities, comprising: forming a slurry of phosphoric acid crystals in a water mother liquor; separating the phosphoric acid crystals from the mother liquor by filtration in a wash column comprising a filtering element, while a packed bed of crystals coming from the slurry forms near such filtering element; washing the separated phosphoric acid crystals in the wash column by bringing a washing liquid in countercurrent to the crystals in the bed up to a wash front, where the washing liquid recrystallizes, the bed being subjected to a movement in the direction of such wash front; forming a purified stream comprising phosphoric acid and a reduced amount of impurities by melting at least part of the washed crystals; and extracting the purified stream from the wash column through a product outlet of the wash column; wherein water is introduced into the wash column, between the wash front and the product outlet and/or in a melting circuit producing at least part of the washing liquid, and wherein the introduction of the said water decreases the equilibrium temperature of the contents of the melting circuit.
摘要翻译： 一种净化含有磷酸和第一量杂质的物流的方法，包括：在水母液中形成磷酸晶体的浆料; 在包含过滤元件的洗涤塔中通过过滤从母液中分离磷酸晶体，而来自浆料的晶体填充床形成在该过滤元件附近; 通过使洗涤液与床中的晶体逆流洗涤前洗涤液洗涤液中的分离的磷酸晶体，洗涤液重结晶，床沿这种洗涤前方向移动; 通过熔化至少部分洗涤的晶体形成包含磷酸和减少量的杂质的纯化物流; 并通过洗涤塔的产物出口从洗涤塔提取纯化物流; 其中将水引入洗涤塔中，洗涤前部和产品出口之间和/或在产生至少部分洗涤液的熔解回路中，并且其中所述水的引入降低了所述洗涤液的内容物的平衡温度 熔化电路。
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