Abstract:
The disclosed invention is a fixed bed ion exchange system from removing arsenic from water. It employs a combination of electronically controlled process steps and specific systems configurations to duplicate the effects of moving resin beds from one operating position to another as is required in moving bed ion exchange water purification systems. The invention combines features of single fixed bed ion exchange systems with those of a moving bed system.
Abstract:
An ion exchange scrubber has a housing, and a partition plate installed within the housing. The partition plate partitions an inner space of the housing in longitudinal direction into two chambers that are filled with a predetermined amount of aqueous solution. The upper end portions of the two partitioned chambers communicate with each other. At least one cartridge is installed at the upper portion and has an ion exchange resin. At least one gas inlet hole is formed in an external plate of the chamber at position below the position where the cartridge is installed. At least one gas inlet tube is connected with the gas inlet hole. A gas exhaust hole is formed in an upper plate of the housing. At least one introduction/exhaustion hole is formed at a lower portion of the chamber, for supplying or exhausting the aqueous solution. At least one connection tube connects the introduction/exhaustion holes with each other. At least one level control valve is installed in the at least one connection tube. The ion exchange resin removes a harmful substance contained in the gas. By repeatedly pumping the aqueous solution from one side chamber to the other side chamber, and immersing and cleaning the contaminated ion exchange resin in the aqueous solution, the contaminated gas can be effectively processed even with a small amount of water.
Abstract:
Exhausted ion exchange resin particles of the hydrogen-form, cationic type are regenerated in a countercurrent process with sulfuric acid, while preventing the formation of calcium sulfate precipitate. Exhausted resin is introduced into the column at the top, and material is simultaneously withdrawn from a lower portion. The volume in the column is maintained constant by introducing a non-precipitating liquid such as water. Preferably, the non-precipitating liquid is introduced through the same filter that is used for withdrawing exhausted regenerant, thereby washing and purging it. The invention also includes apparatus having resin inlet means at the top, outlet means at the bottom, means for circulating regenerant, and means for introducing a second liquid near the top. Preferably, the second liquid inlet means and regenerant outlet means communicate with the apparatus through a common filter.
Abstract:
METHOD FOR REGENERATION OF ION EXCHANGERS HAVING THE SAME IONIC NATURE AND DISPOSED IN SUPERPOSED LAYERS IN THE SAME APPARATUS, SAID IONS BEING SATURATED BY CIRCULATING THE LIQUID TO BE TREATED IN DOWNWARD FLOW THROUGH THE SUPERPOSED LAYERS OF ION EXCHANGERS WHICH ARE REGENERATED BY CIRCULATING THE REGENERATION REAGENT IN COUNTERCURRENT FLOW THROUGH THE LAYERS OF ION EXCHANGERS. AT LEAST ONE REGENERATION REAGENT IS PASSED UPWARDS THROUGH THE DIFFERENT SUPERPOSED LAYERS OF ION EXCHANGERS AND AT LEAST ONE ADDITIONAL STREAM OF LIQUID IS INTRODUCED IN THE VICINITY OF THE INTERFACE BETWEEN TWO SUPERPOSED LAYERS OF ION EXCHANGERS, SAID ADDITIONAL STREAM BEING ALSO CIRCULATED UPWARDS THROUGH THE LAYER OR LAYERS OF ION EXCHANGERS TOGETHER WITH THE STREAM OF REGENERATION REAGENT.
Abstract translation:1323149离子交换DEGREMONT SOC GENERALE D'EPURATION ET D'ASSAINISSEMENT 1970年9月2日[1969年10月14日] 41910/70标题B1J阴离子或阳离子的两层离子交换器3和4可通过在7引入的液体再生。 顶层进一步被另外被引入9的可被加热的液体再生。 水也可以在9处引入。主计长指导了规范1,172,564。
Abstract:
Described herein are processes and apparatus for the high purity and high concentration recovery of multivalent products via continuous ion exchange from aqueous solutions for further down-stream purification.
Abstract:
Described herein are processes and apparatus for the high purity and high concentration recovery of multivalent products via continuous ion exchange from aqueous solutions for further down-stream purification.
Abstract:
The present invention aims at limiting the pressure loss and smoothly discharging water treated by ion exchangers to the outside of the apparatus. Ion exchanging apparatus 1 has outer vessel 3 that has inner space 2; and ion exchanger support 4 that separates at least a part of inner space 2 into upper space 2a and lower space 2b and that can support ion exchangers to be loaded in upper space 2a. At least a part of an upper surface of the ion exchanger support is made from at least one screen which supports the ion exchangers and which has a flow path allowing water treated by the ion exchangers to flow into the lower space 2b.
Abstract:
An improved process for regenerating ion exchange resin, includes a regeneration step of displacing captured ions from the resin to regenerate its ion-capture functionality, followed by one or more fluid-employing post-regeneration steps such as a fluid displacement or rinse, a fluid transporting or mixing, and a rinse down to quality. To avoid problems of early leakage of weakly held ions such as boron, the post-chemical or postdisplacement steps use water that is essentially free of boron, or otherwise avoid localized contamination in the regenerated resin which is used in bottles or beds (30). A two-stage polish may be operated with modified lead/lag bottles. A detector (D) for an indicator condition (conductivity, silica breakthrough) between stages determines when to shift the lag bottle forward, and periodically both bottles are replaced.
Abstract:
An improved process for regenerating ion exchange resin, includes a regeneration step of displacing captured ions from the resin to regenerate its ion-capture functionality, followed by one or more fluid-employing post-regeneration steps such as a fluid displacement or rinse, a fluid transport or mixing, and a rinse down to quality. To avoid problems of early leakage of weakly held ions such as boron, the post-chemical or postdisplacement steps use water that is essentially free of boron, or otherwise avoid localized contamination in the regenerated resin which is used in bottles or beds (30). A two-stage polish may be operated with modified lead/lag bottles. A detector (D) for an indicator condition (conductivity, silica breakthrough) between stages determines when to shift the lag bottle forward, and periodically both bottles are replaced.