SU874090A1

SU874090A1 - Electrodialyzer

Info

Publication number: SU874090A1
Application number: SU762372632A
Authority: SU
Inventors: Николай Григорьевич Лебедь; Сергей Владимирович Шаповалов; Нодар Вахтангович Чхеидзе; Анзор Иванович Антадзе
Original assignee: Предприятие П/Я М-5885
Priority date: 1976-06-15
Filing date: 1976-06-15
Publication date: 1981-10-23

Description

(54) ЭЛЕКТРОДИАЛИЗATOP(54) ELECTRODIALIZATOPOP

II

Изобретение относитс к устроив, ствам дл мембранных методов разделени растворов и может быть использ.овано в электродиализаторах с ионо селективными мембранами, предназна-f ченными дл электрохимической обработки электролитических жидкостей, .например опреснени природных соленых вод, очистки вод и т.п.The invention relates to arrangements for membrane separation methods for solutions and can be used in electrodialyzers with ion selective membranes designed for the electrochemical treatment of electrolytic fluids, for example, desalination of natural salt water, water purification, and the like.

Известны электродиализаторы содержащие электроды, рамки и ионоселективные мембраны, образующие рабочие камеры. Дл увеличени предельной плотности тока в электродиализаторах или, что та же самое, интенсификации процесса перегона ионов через мембраны прибегают к принудительной турбулизации потока жидкостм, например введением в рабочие камеры электродиализаторов сепараторов, выполненных в виде различных сеток fl.Known electrodialyzers containing electrodes, frames and ion-selective membranes, forming the working chamber. In order to increase the limiting current density in electrodialyzers or, which is the same, to intensify the process of transporting ions through membranes, forced flow turbulization of liquids is used, for example by introducing electrodialyzers of separators into the working chambers made in the form of various grids fl.

Недостатком известных электродиализаторов вл етс высокое гидравлическое сопротивление рабочих камер.A disadvantage of the known electrodialyzers is the high hydraulic resistance of the working chambers.

привод щее к повьшенньи энергозатра- там на прокачивание растворов. leading to higher energy consumption for pumping solutions.

Наиболее близким к изобретению по технической сущности и достигаемому результату вл етс электродиализатор , состо щий из электродов, ионоселективных мембран и сепараторов , образующих каналы дл протока обрабатьшаемой жидкости. Выступы сепараторов в известном электродиали10 заторе образуют пр молинейные каналы 2 J.The closest to the invention in technical essence and the achieved result is an electrodialyzer consisting of electrodes, ion-selective membranes and separators, forming channels for the flow of the treated liquid. The protrusions of the separators in the known electrodiali10 mash form straight channels 2 J.

Недостаток известного электродиализатора заключаетс в том, что в нем отсутствуют конструктивные The disadvantage of the known electrodialyzer is that there are no constructive

15 элементы, предназначенные дл перемешивани потока обрабатываемой жидкости, в результате чего дл повышени предельной плотности тока приходитс увеличивать скорость те20 чени раствора, что также привЬдит к росту энергозатрат.15, elements intended for mixing the flow of the treated liquid, as a result of which, to increase the limiting current density, it is necessary to increase the flow rate of the solution, which also leads to an increase in energy consumption.

Claims

The purpose of the invention is to reduce energy consumption. This goal is achieved by the fact that in the electrodialyzer consisting of electrodes, ion-selective forming channels for the flow of the processed liquid, the separators are made in the form of corrugated plates. FIG. 1 schematically shows an electrodialysis apparatus; in fig. 2 - ion-selective membrane and separators forming channels for the flow of the treated liquid, made in the form of corrugated plates. The electrodialysis apparatus is an apparatus containing electrodes 1 and 2, ion-selective membranes 3 and separators A, forming channels for the flow of the treated liquid. The separators 4 can be plates of an appropriate shape, attached to the membranes, or plates made when the membranes are molded. The electrodialyzer works as follows. The processed solutions enter the channels formed by the surfaces of the ion-selective membranes 3 and the separators 4. When flowing around the curved surfaces of the separators, vortices appear in liquids, the axes of motion of which are directed along the axes of the channels. These vortices allow the solutions to move, which makes it possible to increase the limiting density of the electric current. 04 Having arisen on a curvilinear section and having consumed the energy of the flow, the vortices can propagate for some distance in the direction of the fluid flow, the energy consumption for generating the vortices can be reduced by decreasing the length of the curvilinear sections due to. alternating them with linear sections. The use of the inventions will ensure that the required current densities are achieved at low flow rates, which in turn will reduce the energy consumption for pumping solutions by 1.5-2 times. Claims of the invention Electrodialysis apparatus consisting of electrodes, ion-selective membranes and separators forming channels for flow the processed liquid, which is aided by the fact that, in order to reduce energy consumption, the separators are made in the form of corrugated plates. Sources of information taken into account in the examination of J, Ionoobm en membranes in electrodialysis. L., Himi, J970, s, 204-213. 2, USSR Author's Certificate No. 216622, cl. On 01 D 13/02, 1972 (prototype),