RU149984U1 - ELECTRODIALYSIS MODULE - Google Patents

Abstract

где Q - расход жидкости, м²/ч; υ - скорость течения продукта в трубопроводе, м/сек; γ - удельный вес продукта при заданных параметрах, кг/м³ The utility model relates to technological devices designed for electrochemical processing of liquids - electrolytes by electrodialysis, and can be used for filterpress type electrodialyzers. The technical result includes increasing the efficiency of the device by making gaskets in the brine and desalinated frames, as well as in holes in the anion and cation exchange membranes of complex shape with calculated diameters, which prevents the flow of the desalted solution into the neighboring chambers of the brine solution. The technical result is achieved due to the fact that the Electrodialysis module contains a bag of alternating anionic and cation exchange membranes, and gasket frames, and they have holes for input and output of dialysate (desalted) and concentrate (brine), with the formation of a round package the shape of the collectors for the distribution of flows of solutions of dialysate and concentrate in the device. Inside, each gasket frame is equipped with a mesh-turbulator, and the package includes tie plates, between which electrodes are placed. Moreover, in brine and desalinated framework gaskets, as well as in membranes, alternating round holes with diameters D _pac and D _about, respectively, are made. All holes in the gasket frames are located on a horizontal axis located at a distance of at least 1.3 D from the lower and upper edges of the gasket frame. In addition, the holes in the desalinated framework gaskets are located asymmetrically with respect to the holes in the brine framework gaskets. All holes in both types of gaskets are located at the same distance from each other and at distances of 1.3 D _about or 1.3 D _pac, respectively, from the lower and upper edges of the gaskets. At a distance of 1.5 D _about up from the axis of the inlet and down from the axis of the outlet is the horizontal axis of the flow distribution manifolds. The gasket frames of both types in the center are equipped with a rectangular window with rounded corners, at a distance from the gasket edge to the edge of the window left and right, equal to 1.2 D _about , and from below and above - (3-3.5) D _about . Over each inlet of the brine frames - gaskets, four slots are fan-shaped, with an inclination in one direction and a width of 2-3 mm, the lower edge of which in the vertical direction is 5 mm below the axis of the distribution of flows, and in the horizontal direction, the lower edge of the slots is symmetrically to the vertical axis of the holes with a diameter of D _about at a distance of 7 mm between each other. The upper edge of the slots is connected to the window of the gasket frame with a step between them at the exit to the frame window equal to (0.6-0.8) D _rev . In turn, slots are also located above the holes of the desalinated gasket frames: above the first hole - 1 slot, above the second - 2 holes, above the third - 3 holes, with an inclination in one direction and a width of 2 mm, the lower edge of the holes is located at a distance of 5 mm below the axis of the distribution of flows, and the lower edge of the slots of these gasket frames in the horizontal direction is located symmetrically to the vertical axis of the collector of brine gasket frames at a distance of at least 7 mm from each other. The upper edge of these slots is also connected to the frame window, with a step between them at the exit to the frame window, equal to 1.1-1.3 D _rev . When applying brine spacer frames to the desalted spacer frames, only one intersection of the slots is obtained, located directly at the frame window. Above inlets diameter Bras obessolnyh frames gaskets made collector in the form of complex shapes, in which the round member is connected 0,3-0.5 channel width D _of the hole dialysate flow distribution in the form of an elongated ellipse, a distance from the vertical axis of the hole D _races frame obessolnoy - gaskets to the left and right edges of the hole equal to (0.3-0.5) D _about .. Above the inlets with a diameter of D _about ., brine frames-gaskets made collector in the form of a complex figure, in which a round element is connected by a channel of width ( 0.3-0.5) D _about with an aperture of distribution of a stream of a concentrate in the form of an extended ellipse. The distance from the vertical axis of the hole Bras brine frame strip to the left and right edges of the hole is (0.3-0.5) D _about . When applying the brine-strip gasket to the desalinated gasket-frame, the slots in the latter are located in the center of the distribution hole of the desalinated liquid flow. The dimensions of Bob and Iras are determined by the formula:

where Q is the fluid flow rate, m ² / h; υ is the flow rate of the product in the pipeline, m / s; γ is the specific gravity of the product at given parameters, kg / m ³

Description

The utility model relates to technological devices intended for electrochemical processing of electrolyte liquids by electrodialysis, and can be used for filterpress type electrodialyzers.

The well-known "Electrodialyzer", comprising ion-exchange membranes and gaskets located between the electrodes, having openings that form complete channels for supplying raw water and output of dialysate and concentrate, gasket openings are made with annular protrusions on which membranes are mounted through holes. Patent for invention No. 2201793, MKI: B01D 61/46; publ. 04/10/2003

The well-known "Electrodialyzer" comprising electrodes between which ionite membranes and gaskets are placed, in which openings are made, forming channels for supplying the initial solution and output of dialysate and concentrate during assembly, a slot is made in the gaskets, the beginning and end of which are connected to the holes, while the slot made in the form of concentric arcs connected in series with each other by channels, the length of which is 2-10% of the length of the arc.

Patent for invention No. 1707813, MKI: B01D 61/42, D. publ. 10.20.1996 g.

The well-known "Electrodialyzer" comprising the main end electrodes, additional internal electrodes, dividing the electrodialyzer into sections, alternating opposite ion-selective membranes installed between the electrodes, separator gaskets, in which at least three holes are made for the supply paths of the initial solution and removal of desalination products, the input pipe for the input of the initial solution and output products of electrodialysis, in the center of each section of the electrodialyzer installed waterproof partition from conductive material with two holes for paths.

Patent for invention No. 2234359, MKI: B01D 61/50, d. Publ. 08/18/2004

The closest technical solution to the proposed invention is the “Electrodialyzer”, including tie plates, between which end electrodes are placed, and a pack of between alternating anion and cation exchange membranes, and gasket frames having openings for input and output of dialysate and concentrate, fixed with tie devices, and sections of gaskets in which openings for input and output of the apparatus are made, are located beyond the dimensions of the membranes and are made of two parts in which alternating grooves are made, forming ie when assembling channels. Patent for invention No. 1681433, MKI: B01D 61/42; publ. 1996.10.20.

The technical result includes increasing the efficiency of the device by making gaskets in the brine and desalinated frames, as well as in holes in the anion and cation exchange membranes of complex shape with calculated diameters, which prevents the flow of the desalted solution into the neighboring chambers of the brine solution.

The technical result is achieved due to the fact that the Electrodialysis module contains a packet of alternating anionic and cation-exchange membranes, and gasket frames, and they have holes for input and output of dialysate (desalted) and concentrate (brine), with the formation of the collector during assembly of the package for the distribution of flows of solutions of dialysate and concentrate in the device. The package includes couplers between which electrodes are placed. Moreover, in brine and desalinated framework gaskets, as well as in membranes, alternating round holes with diameters D _races and D _about, respectively, are made. All holes in the gasket frames are located on a horizontal axis located at a distance of at least 1.3 D from the lower and upper edges of the gasket frame. In addition, the holes in the desalinated framework gaskets are located asymmetrically with respect to the holes in the brine framework gaskets. All holes in both types of gaskets are located at the same distance from each other and at distances of 1.3 D _about or 1.3 D _races, respectively, from the lower and upper edges of the gaskets. At a distance of 1.5 D _about up from the axis of the inlet and down from the axis of the outlet is the horizontal axis of the flow distribution manifolds. The gasket frames of both types in the center are equipped with a rectangular window with rounded corners, at a distance from the gasket edge to the edge of the window left and right, equal to 1.2 D _about , and from below and above - (3-3.5) D _about . Four slots are fan-shaped above each inlet of the brine-gasket frames, with an inclination in one direction and a width of 2-3 mm, the lower edge of which in the vertical direction is 5 mm below the axis of the distribution of flows, and in the horizontal direction, the lower edge of the slots is symmetrically to the vertical axis of the holes with a diameter of D _about at a distance of 7 mm between each other. The upper edge of the slots is connected to the window of the gasket frame with a step between them at the exit to the frame window equal to (0.6-0.8) D _rev . In turn, slots are also located above the holes of the desalinated gasket frames: above the first hole - 1 slot, above the second - 2 holes, above the third - 3 holes, with an inclination in one direction and a width of 2 mm, the lower edge of the holes is located at a distance of 5 mm below the axis of the distribution of flows, and the lower edge of the slots of these gasket frames in the horizontal direction is located symmetrically to the vertical axis of the collector of brine gasket frames at a distance of at least 7 mm from each other. The upper edge of these slots is also connected to the frame window, with a step between them at the exit to the frame window, equal to 1.1-1.3 D _rev . When applying brine spacer frames to the desalted spacer frames, only one intersection of the slots is obtained, located directly at the frame window. Above the inlet openings with a diameter D _races obessolnyh frames gaskets made collector in the form of figures, in which round element connected 0,3-0.5 channel width D _of the hole for input and output of the desalted-dialysate solution in the form of an elongated ellipse, the distance from the vertical axis holes D _{races of the} desalinated gasket frame to the left and right edge of the hole is equal to (0.3-0.5) D _rev .. Above the inlet holes with a diameter D _vol . connected by a channel width (0.3 -0.5) D _about with an opening for input and output of brine concentrate in the form of an elongated ellipse. The distance from the vertical axis of the hole D _{races of the} brine gasket frame to the left and right edges of the hole is (0.3-0.5) D _about . When applying the brine-strip gasket to the desalinated gasket-frame, the slots in the latter are located in the center of the distribution hole of the desalinated liquid flow. Dimensions D _about and D _{races are} determined by the formula:

where Q is the fluid flow rate, m ² / h;

υ is the flow rate of the product in the pipeline, m / s;

γ is the specific gravity of the product at given parameters, kg / m ³

The electrodialysis module is illustrated in FIG. 1, 2, 3, 4, 5 and 6

FIG. 1 - Electrodialysis module (general view)

FIG. 2 - Electrodialysis module (circuit desalination frame-laying);

FIG. 3 - Electrodialysis module (scheme of brine frame-laying);

FIG. 4 - Electrodialysis module (diagram of anion-cation exchange membrane);

FIG. 5 - Electrodialysis module (scheme for applying the desalinated frame-laying to the membrane)

FIG. 6 - Electrodialysis module (the scheme for applying the brine frame-gasket to the membrane).

According to FIG. 1 electrodialysis module contains a package of alternating gasket frames of desalted 2 and brine 4, and anionic and cation exchange membranes 3 placed between two tie plates 1 and 5 with electrodes of a flat shape (not shown conventionally in Fig. 1). According to FIG. 2, 3, 4, and 5 in the screed plates 1 and 5, membranes 3, and gasket frames 2 and 4, holes were made: in the lower part 6 for the inlet of brine solution and 7 desalted solution, and in the upper part 8, for the outlet of brine solution and 9 for the output of the desalted solution, these holes form a cylindrical shape of the collector during assembly of the package for distributing the solutions in the device. Each gasket frame is equipped with a mesh-turbulator (not shown conditionally in Fig. 1). The package is fixed to each other by a clamping device in the form of a metal frame, studs and nuts.

In the desalted and brine framework-gaskets 2 and 4, slots 10 are made, and a collector of the distribution of solution flows 11.

In the gaskets and in the membranes, round holes are made in brine 13 with diameters D _pac . and desalted 14 with D _about . respectively. All holes are located on the horizontal axis at a distance of not less than 1.3 D _about from the lower and upper edges of the gasket frame. In this case, the holes with diameters D _about and D _pac alternate. In addition, all holes are located at the same distance from each other so that the distance between adjacent holes was at least D _about . In this case, the distance from the edges of the left and right holes to the edges of the gasket frame and membrane should be at least D _about . At a distance of (1-1.5) D _about up from the axis of the inlets and downwards from the axis of the outlet holes, the horizontal axis of the flow distribution manifolds 11, respectively, is located. The center gaskets of both types are provided with a rectangular window with rounded corners at a distance from the gasket edge to the edges of the window to the left and right are 1.2 D _rev , and bottom and top not less than (3-3.5) D _rev .

Over each inlet with a diameter D _of brine gasket frames, four slots 10 are fan-shaped, with an inclination in one direction and a width of 2-3 mm, the lower edge of which in the vertical direction is 5 mm below the axis of the flow distribution, and in the horizontal direction the lower edge of the slots is located symmetrically to the vertical axis of the holes with a diameter of D _about at a distance of 7 mm between each other, while the upper edge of the slots is connected to the window of the gasket frame with a step between them at the exit to the frame window equal to (0.6-0.8) D _about

In turn, slots 10 are also located above each inlet with a diameter D _{pac of} brine spacer frames 4: 1 slot above the first hole, 2 holes above the second, 3 slots above the third, with an inclination in one direction and a width of 2 mm. The lower edge of the slots is located at a distance of 5 mm below the axis of the distribution of flows, and the lower edge of the slots of these gasket frames is located horizontally symmetrically to the vertical axis of the collector of brine gasket frames 4 at least 7 mm apart, the upper edge of these slots is also connected to window frames, with a step therebetween at the exit site of the window frame, equal to (1,1-1,3) D _vol., wherein upon application of brine frames obessolnye gaskets on the gasket-frame 2 give only one intersection slits arranged ie directly from the window frame.

In addition, a collector in the form of a figure in which a round element is connected by a channel is made over each inlet with a diameter D of _{races of} desalinated gasket frames 2. 12 wide (0.3-0.5) D _about . with a hole 11 for input and output of brine concentrate in the form of an elongated ellipse with a width of (0.3-0.5) D _about . A distance from the vertical axis of the hole diameter D _races obessolnoy frame-pad 2 to the left and right edges of the distribution holes of streams is (0,3-0,5) D _vol. Accordingly, a collector in the form of a figure in which a round element is connected by a channel with a width of (0.3-0.5) D _about . Also is made over each inlet with a diameter D _about brine spacer frames 2. with a hole for input and output of desalted dialysate solution in the form of an elongated ellipse with a width of (0.3-0.5) D _about . The distance from the vertical axis of the hole with a diameter D of the _{races of the} desalinated frame strip 4 to the left and right edges of the holes of the distribution of flows is equal to (0.3-0.5) D _about .

Membranes differ from gasket frames by the absence of rectangular windows in the center and the absence of fan-shaped slots. Above each inlet with a diameter of D _races , a collector of the same shape is located as in the desalinated framework gaskets 2, and above each inlet D of the _ob - there is a collector of the same shape as in the brine framework gaskets 4.

The holes for the outlet of the desalted 13 and brine 14 solutions in the upper part are located asymmetrically with respect to the holes for the entrance of the desalinated and brine solutions in the upper part of the module.

At the same time, it is essential that, when the brine gasket frames, desalinated gasket frames, and membranes are superimposed, the openings and collectors are aligned, and the fan-shaped slots are located in the center of the liquid distribution distribution hole. Finally, the sizes D _about and D _{races are} determined by the formula:

where Q is the fluid flow rate, m ² / h;

υ is the flow rate of the product in the pipeline, m / s;

γ is the specific gravity of the product at given parameters, kg / m ³

The electrodialysis module works as follows: when applying the gasket frame to the membrane (Fig. 5) for the desalinated gasket frame 2 and (Fig. 6) for the brine gasket frame 4, all collectors are aligned, and the slots 10 in the desalinated gasket frame 2 fall into the collector 11 of the desalted solution. In turn, the slots 10 in the brine gasket frame fall into the collector 11 of the brine solution. When a desalted solution is supplied under pressure to its collectors in the lower part of the module, the solution enters the window of the desalinated gasket frame 2 through slots, rises and is discharged through the collectors 11 of the desalted solution in the upper part of the module. In this case, the desalted solution does not flow into the adjacent chambers of the brine solution. A similar situation occurs when brine solution is fed into the collectors of brine gasket frames.

The device proposed as a utility model can improve the efficiency of the device by making holes and slits of complex shape within the gaskets and membranes, which prevents the flow of the desalted solution (dialysate) into the neighboring chambers of the brine solution (concentrate).

Claims (1)

An electrodialysis module containing a bag of alternating anion and cation exchange membranes and gasket frames, with holes for input and output of dialysate (desalted) and concentrate (brine) made in them with the formation of the collector package for distribution of the flows of dialysate and concentrate solutions in the device, the package includes clamping plates, between which electrodes are placed, characterized in that alternating round holes are made in the brine and desalinated framework-gaskets, as well as in the membranes molds with diameters D _pac and D _about respectively, while all holes in the gasket framework are located on a horizontal axis located at a distance of at least 1.3 D from the lower and upper edges of the gasket frame, in addition, holes in the desalinated gasket framework located asymmetrically with respect to the holes in the brine-gasket frames, all holes in both types of gaskets are located at the same distance from each other and at distances of 1.3 D _about or 1.3 D _pac, respectively, from the lower and upper edges of the gaskets, while dist oyanii _about 1,5 D up from the axis of the input and downwardly from the axis of the outlet openings is a horizontal axis flow distribution headers, and both types of gasket-frames are provided in the center of the window of rectangular shape with rounded corners, at a distance from the gasket edge to edge of the window on the left and right equal to 1.2 D _about , and from the top and bottom - (3-3.5) D _about , finally, over each inlet of the brine-gasket frames, four slots are fan-shaped with an inclination in one direction and a width of 2-3 mm, the lower edge which in the vertical direction Xia 5 mm below the axis of flow distribution, and in the horizontal direction of the lower slits region is symmetrical vertical axis openings with a diameter D _of a distance of 7 mm between them, wherein the upper edge of the slots is connected to the window frame-gasket with a step between them in place exit to the window frame equal to (0.6-0.8) D _about , in turn, above the holes of the desalinated frames-gaskets are also fan-shaped slots: above the first hole - 1 slot, above the second - 2 cuts, above the third - 3 slots, tilted one way and irina 2 mm, the lower edge of the slots is located at a distance of 5 mm below the axis of the distribution of flows, and the lower edge of the slots of these gasket frames is located horizontally symmetrically to the vertical axis of the collector of brine gasket frames at a distance of at least 7 mm from each other, the upper edge of these slots also connected to the frame window, with a step between them at the exit point of the frame window, equal to 1.1-1.3 D _about , while when applying the brine frames-spacers on the desalinated frames-spacers get only one intersection of the slots, located directly at the window of the frame, in addition, over the inlets with a diameter D _{pac of} desalinated gasket frames, a collector is made in the form of a figure in which a round element is connected by a channel of width (0.3-0.5) D _ob with an opening for input and output a desalted dialysate solution in the form of an elongated ellipse, the distance from the vertical axis of the hole D _{pac of the} desalinated gasket frame to the left and right edges of the hole is (0.3-0.5) D _about , in addition, over the inlets with a diameter of D _about , brine-gasket frames made collector in the form IGUR in which round element connected to the channel width (0,3-0,5) D with _an opening for inputting and outputting brine concentrate solution in the form of an elongated ellipse, a distance from the vertical axis of the hole D _pac brine gasket-frame to the left and right the edges of the hole are equal to (0.3-0.5) D _about , and when applying the brine frame-strip on the desalinated frame-strip of the slot in the latter is placed in the center of the hole for input and output of the desalted dialysate solution, finally the sizes D _about and D _pac determined by the formula:

where Q is the fluid flow rate, m ² / h; υ is the flow rate of the product in the pipeline, m / s; γ is the specific gravity of the product at given parameters, kg / m ³ _.

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