3 results about "Reversed electrodialysis" patented technology

A salt wastewater treatment system for treating high-concentration salt wastewater, according to an embodiment of the present invention, comprises: a first pretreatment part having a first oxidation-reduction part for decomposing and removing, by means of an oxidation-reduction reaction using an oxidizing agent and a reducing agent, at least a part of organic matter and inorganic salts contained in high-concentration salt wastewater when the high-concentration salt wastewater flows therein; a second pretreatment part into which primarily pretreated water pretreated in the first pretreatment part flows, and which has a second oxidation-reduction part that performs the additional decomposition of the organic matter and inorganic salts of the primarily pretreated water by means of a secondary oxidation-reduction reaction, and a water-softening part that removes hardness components by spraying radical water; and a main treatment part which has a desalination part for continuously performing reverse electrodialysis and bipolar electrodialysis, and into which secondarily pretreated water pretreated in the second pretreatment part flows so that secondarily pretreated water is desalinated in a non-evaporative manner, wherein the first and second oxidation-reduction parts each include an oxidation-reduction process part in which an oxidation reaction using the oxidizing agent and a reduction reaction using the reducing agent are simultaneously performed.

A kind of microporous sulfonated poly (ether ether ketone) membrane for reverse electrodialysis energy conversion, preparation method and application thereof belong to ion exchange membrane technical field. First, bisphenol fluorene, 4,4'-difluorobenzophenone, alkaline catalyst and water-removing agent are added into solvent to carry out nucleophilic polycondensation reaction to obtain poly (ether ether ketone) ;Second, it is dissolved in anhydrous dichloromethane, and chlorosulfonic acid / dichloromethane solution is added to carry out sulfonation reaction to obtain sulfonated poly (ether ether ketone) with different sulfonation degrees;Finally, it is dissolved and formed into film by solution casting method, the main chain is the copolymer of bisphenol fluorene and 4,4'-difluorobenzophenone, and the main chain contains rigid fluorenyl structural unit.The rigid fluorenyl structural unit of the application limits the conformational rotation of the main chain by steric hindrance, forms size-stable intrinsic microporous ion channel, realizes the rigidification of ion channel and the intrinsic microporous structure while maintaining the excellent film-forming property of SPEEK;Long-term operation stability is excellent, preparation process is simple, raw material cost is controllable, and it is suitable for reverse electrodialysis energy conversion field.

The application discloses an integrated reverse electrodialysis seawater hydrogen production system and a running method thereof. The system comprises: an alkali hydrogen production electrolytic cell, an alkali liquor circulation outlet of which is communicated with a high-concentration chamber of a multi-stage reverse electrodialysis device; the multi-stage reverse electrodialysis device comprises a concentration difference power generation module composed of a stack of at least three electrodialysis cell stack units, and the power output ends of the concentration difference power generation module are respectively connected to a driving component of the alkali hydrogen production electrolytic cell and an online seawater desalination device, so that ion migration is driven by the concentration difference between concentrated alkali liquor and dilute alkali liquor to generate electric energy; the online seawater desalination device is of an alkali regeneration type and is of a permeation structure, and pure water is separated by using a permeation pressure difference to obtain desalination water, and a desalination water outlet of the online seawater desalination device is communicated with a water supplementing opening of the alkali hydrogen production electrolytic cell and a low-concentration chamber of the multi-stage reverse electrodialysis device. The application has the advantages of simple structure, cooperative closed-loop operation of concentration difference power generation, electrolytic waste heat recovery and online seawater desalination, energy cascade utilization and material closed loop, and reduced hydrogen production energy consumption.