RU2092622C1 - Device for powering consecutively connected electrolyzer cells - Google Patents

Abstract

FIELD: electrolytic metal production. SUBSTANCE: device constructed in the form of two-level system contains anode cage with carbon anodes disposed in longitudinal direction, to which, through uprights and anode cross-bars, direct current with intensity higher than 170 kA is supplied; and cathode blocks disposed on the electrolyzer cell bottom, from which direct current used in electrolysis process is led away through steel transverse sheets. Device is distinguished with its being provided with (i) two uprights symmetrically disposed on longitudinal side near the middle line of cell displaced to transverse axis and (ii) two uprights symmetrically disposed on the end side where current enters electrolyzer cells and through which 50% of current consumed in electrolyzer process is passed. Approximately at the level of cathode integrated bus, on the side opposite to neighboring set of cells, there is a bus designed to compensate magnetic effect of neighboring sets of cells calculated for current intensity constituting some 25% of current intensity consumed in electrolyzer process and which is directed oppositely to current of system. EFFECT: improved design. 4 cl, 2 dwg

Description

 The invention relates to a device for powering series-connected cells of the cell.

 From the USSR author's certificate 738 518, 1978, a device is known for powering series-connected cells of an electrolyzer, mainly when the cells are arranged in two rows, containing for each cell an anode cage with anode buses in each cell and with anodes located in the longitudinal direction, elements for removing current from each cell, located on the longitudinal sides of each cell symmetrically relative to the middle of the cell, two risers, located symmetrically on the end side of each cell from the supply side current, two cathode busbars located on each longitudinal side of the cell, with some of the elements for current drainage of each cell located on the side of the current supply to the cell connected to the first cathodic busbars, part of elements for current drainage of each cell located on the side of the tap the cell current connected to the second cathode busbars of each cell connected to the risers located on the front side of the subsequent cell, the second cathode busbars connected to the risers located along the s side of the next cell, the risers are located on the front side of each cell, connected to the beginning of the anode busbar, risers, situated on the longitudinal side of each cell are connected to the middle part of anode buses.

 The objective of the invention is the effective suppression of three-way MHD instabilities, the compensation of the harmful magnetic field of the adjacent row and the favorable distribution of the magnetic field in a symmetrical busbar system with a symmetrical arrangement of risers and with a compensation bus independent of the current-carrying 4 current-carrying buses.

 The solution to this problem is provided due to the fact that the device for powering the cells of the electrolyzer connected in series is equipped with a bus to compensate for the influence of the magnetic field of neighboring rows of cells, and the compensation bus is located at the level of the cathode busbars on the outside of both rows of cells, the anodes are made of carbon, as elements for current drainage used cathode blocks located at the bottom of the cells, the connection of the cathode blocks with cathode busbars made using flexible connecting fields a.

 It is advisable that the compensation bus is located near the cathode busbar and is electrically isolated from it and the remaining cathode busbars.

 At the same time, at least part of the compensation bus can be located at the bathtub level, and the compensation bus itself can be connected to a separate power supply system.

 In FIG. 1 shows a top view of a cell of an electrolyzer according to the invention; in FIG. 2 principle of the location of several cells of the electrolyzer and the compensation bus.

 Fig. 1 shows a busbar system with longitudinally mounted cells of the electrolyzer, and in Figs. 2 measures in accordance with the invention to compensate for the influence of neighboring rows. The busbar system itself is shown in FIG. 1 for one cell with 14 anodes (1) and 12 cathode conductive pins. However, the principle of the invention allows the transfer to longitudinally located cells of the cell using a different number of cathode conductive pins and a different number of anodes. The system current direction is symbolically indicated in FIG. 1 using the arrow.

 Subsequently, half of the cell of the cell on the current input side and on the current output side is distinguished. These concepts must be considered with respect to the direction of the system current, which will become clearer later.

 The cathode conductive pins of half of the cell of the cell on the current inlet side are connected using flexible connecting strips (10 12, 10 '12') with cathode busbars (13, 13 '). These busbars can be made in the form of separate conductors, however, usually several rectangular conductors are combined in a bus package. Cathode busbars (13, 13 ') are sent to two risers of the next cell of the electrolyzer. These risers are located near the outer cell limit of the cell on the current input side. The risers (14, 14 ') are introduced using flexible connecting strips into the anode cross-pieces (2, 2'), respectively 25% of the system current.

 The cathode conductive pins of half the cell of the cell on the current inlet side are also connected to the cathode busbars using flexible connecting strips (15 17, 15 '17'). They are again made in the form of individual conductors or in the form of packages of conductors. These cathode busbars are connected to the risers (19, 19 '), from which again the flexible connecting strips introduce current into the anode crossbars (2, 2'). Both of these risers are ideally located on the middle line of the cell passing across the direction of the current. In order to be able to replace the anodes during operation, with an odd number of anodes in a row, however, a compromise is necessary. In this case, the risers, as shown in FIG. 1 are positioned between the middle and subsequent or previous anode.

 The described system of busbars due to its simplicity in comparison with other designs has the advantage that it can be implemented using tires of low weight and therefore with low capital costs. The disadvantage is that the symmetrical busbar system cannot compensate for the harmful magnetic effect of the adjacent row of cells.

 In accordance with the invention, this compensation is achieved due to the fact that in accordance with the schematic drawing (Fig. 2), along with a number of cells (20) of the electrolyzer, a compensation bus (21) is laid. This bus is located approximately at the level of the cathode busbars on the opposite side to the adjacent row (22). A constant current flows through the compensation bus, amounting to approximately 25% of the system current. The strength of the compensation current depends, first, on the removal of the cells from the neighboring row, and secondly, on the removal of the cells from the compensation bus itself. The direction of current is opposite to the direction of current flow of the system.

 Together with the symmetric busbar system described above, it was thus possible to achieve magnetic fields in the cells of the electrolyzer that are clearly more favorable than using alternative systems, in which the influence of adjacent rows is reduced by using the asymmetric direction of the tires.

Claims (4)

 1. Device for powering series-connected cells of the electrolyzer, mainly when the cells are arranged in two rows, containing for each cell an anode frame with anode buses in each cell and longitudinally arranged anodes, elements for removing current from each cell, two risers, located on the longitudinal sides of each cell symmetrically with respect to the middle of the cell, two risers located symmetrically on the end side of each cell on the current supply side, two cathode busbars, arranged laid on each longitudinal side of the cell, moreover, a part of the elements for current drainage of each cell located on the side of the current supply to the cell is connected to the first cathode busbars, a part of elements for current drainage of each cell located on the side of the current drain from the cell is connected to the second cathodic busbars, the first cathodic busbar of each cell is connected to the risers located on the front side of the subsequent cell, the second cathodic busbar of each cell is connected to the risers located on longitudinal sides of the subsequent cell, risers located on the end side of each cell connected to the beginning of the anode tires, risers located on the longitudinal side of each cell with the middle part of the anode tires, characterized in that it is equipped with a bus to compensate for the influence of the magnetic field of adjacent rows of cells moreover, the compensation bus is located at the level of cathode busbars on the outside of both rows of cells, the anodes are made of carbon, and cathode blocks located on not cells, the connection of the cathode blocks with cathode busbars made using flexible connecting strips.  2. The device according to claim 1, characterized in that the compensation bus is located near the cathode busbar and is electrically isolated from it and other cathode busbars.  3. The device according to claim 1 or 2, characterized in that at least part of the tire for compensation is located at the level of the bath.  4. The device according to any one of claims 1 to 3, characterized in that the compensation bus is connected to a separate power supply system.

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