专利摘要:
Unitary, cast structural element for filter press electrolysis cell which incorporates into a single unit the central barrier between the peripheral boundaries for the adjacent anolyte compartment and adjacent catholyte compartment of two electrolysis cells located on opposite sides of the central barrier. Also incorporated into the single cast structural element are anode bosses and cathode bosses extending outwardly from opposite sides of the central barrier. These bosses not only serve as mechanical support for their respective flat plate anode and cathode, but also they serve as stand-off means and electrical current collectors and disperses from the cathode of one electrolysis cell to the anode of the next cell. Simplicity of design coupled with incorporation of many functional elements into one part eliminates many cell warpage problems, inherent high voltage problems and membrane "hot spot" problems.
公开号:SU1524810A3
申请号:SU843818852
申请日:1984-11-06
公开日:1989-11-23
发明作者:Джин Элдон Моррис Грегори;Нил Бивер Ричард;Гроссхандлер Сандор;Дин Данг Хип;Рекс Пимлотт Джон
申请人:Дзе Дау Кемикал Компани (Фирма);
IPC主号:
专利说明:

The invention relates to the electrochemical industry, in particular to the structures of filter-type electrolyzers.
The purpose of the invention is to simplify the design.
Pa figs. Figure 1 shows a disassembled electrolyzer with a partial cut-out with attached parts forming one bipolar electrode; pas figs. 2 - three sections of the electrolyzer, the cross section (cell sections are shown as they are presented in the posterior p of the electrolyzer); in fig. 3 — disassembled cell structure, side view, section.
The electrolyzer contains a bipolar electrode consisting of a base sheet 1. The material of the base sheet 1
It is selected from the series: iron, stainless steel, nickel-aluminum, chromium, magnesium, titanium, tantalum, cadmium, zirconium, lead, zinc, vanadium tungsten, iridium, radium, cobalt, and their alloys.
The main sheet 1 is made with protrusions 2 on the surface and a peripheral flange 3 made along the sides of the main sheet 1. Flange 3 is located at a distance from the projections 2. The main sheet 1 is made of solid metal, which eliminates its distortion, flow of liquid, improves the distribution of electric current over the surface of the electrode and the costs are reduced.
SP

four
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OcHOJ uoH sheet 1 is connected to US 4 and cathode 5 through an anodic metal sheath 6 and through a ca. 4i, iiyio metal sheath 7, Cathode metal sheath 7 is made of metal selected from nickel, its alloys, chromium, tan - Tj: i, titanium, cadmium, zirconium, lead, zinc, vanadium, tungsten, iridium, cobalt. The anodic metal plate 6 is made of a metal selected from the series: tantalum, titanium, ch1, xy bi, hafnium, zirconium and their silanes.
Hob, Hi 6 Is to protect the axial sheet 1 from the aniligl side from corrosion.
Preferably, the titanium lining 7 is cylindrical in such a way that it does not have 6; L:; n stresses in order to secure the lamination (.f1n-l lining to which the hydrogen could not quickly 1st; deG (p, ovl with the formation of jiiij ;, non-conductive electric current, titanium titanium. It is known that ptomarc hydrogen transmits LydT with titanium strained more quickly, the elimination of such stresses n 1.1bkladx is carried out by means of forming IB plate press with an increased turability of 482-533 C. Both the lining and the icc groin are cut to this FGPG 1. 1C1.atures before pressing the plates to the required} configuration.Then the facing is kept in an irradiation process; -: press for about 45 minutes to prevent it from becoming tensioned during its cooling - Ji, -: i ciin i to room tegptypy,
W-6, connect with steel 11: I B OS L b; sheet 1 at, and
welding resistance, this is not straight, and when no monon welding the lining 6 to the protrusions 2 of a truncated-conical configuration through vanadium 8 vanadium is a metal that is welded by itself and which is compatible with titanium and steel -. Iodine welding compatibility does not mean that one metal being welded forms a plastic solid solution with another one that is welded: - metashm when welding two B1 metal: este, Titanium and steel are not welded compatible with vanadium. Therefore, vanadium waves (11 or 8 are used as

0 5
 -
0
five
0
five
an intermediate metal between the steel anode protrusions 2 and the titanium plate 6 to weld them together to form an electrical connection between the plate 6 and the base sheet 1, as well as to form a mechanical supporting device.
The preferred conjugation of the anolite side plate 6 with the base sheet 1 can be seen from FIG. 2. The plates 6 and 7 have recesses or hollow caps 9 formed by indentation. These caps 9 have a truncated conical configuration and are hollow rather than solid like the projections 2. The caps 9 are of such dimensions and arranged so that they fit over the projections 2. The depth of the caps being pressed is such that their inner ends are adjacent to the vanadium wafer 8, when the wafers 8 abut against the flat ends of the anode protrusions 2, and then these elements are welded together. By configuration, the protrusions and caps may be rectangular or any other suitable shape. However, their ends should be entirely flat and should lie entirely in the same imaginary geometric plane. The anode protrusions and caps should have this configuration and should be arranged to direct the circulation of gas and anolyte.
The anode 4 is a substantially flat sheet of rolled metal or woven wire, made of titanium, preferably having a ruten oxide oxide coating on it. It is welded directly to the inside of the flat ends of the recessed caps.
9 plates 6. These welded joints form an electrical connection
and a mechanical anode support device 4. Another catalytic coating can be used.
Pa figs. 2, between the anode 4 of one section of the cell and the cathode 5 of the next adjacent section of the cell, the membrane 10 is positioned so as to form an electrolysis cell.
The location of the anode 4 inside the anolyte cell relative to the membrane
10 and the main lined sheet is determined by the interaction between the flange 3, protruding away from the main sheet 1, the projections 2 of the bases 51
Leaf, Vanadium Wafer Thickness 8, Lining Thickness 6, etc.
The anode 4 can be displaced from the position: adjacent to the membrane 10 to a position with a certain significant gap between the membrane 10 and the anode 4 by changing the height of the projections 2 of the base sheet 1. However, it is preferable that the flange 3 on the anolyte side of the base sheet protrudes What are the anode protrusions 2. This leads to a simplification of the cell element design, the same can be said about the catholyte separation.
In order to create a liquid-tight seal between the membrane 10 and the flange 3, it is preferable to manufacture the plates in the form of a tray with a waste edge 11 located at the periphery. The edge 11 is flush with the flange 3. The periphery of the membrane 10 is flush with the edge 11 of the plate and the peripheral gap of 12 fits flush with the other side of the periphery of the membrane 10. In the cells assembled in series (Fig. 2) the gasket 12 is flush with the flange surface 3 of the metropolitan side of the next neighboring cell element.
Although only one gasket 12 is shown, the invention also contemplates the use of gaskets on both sides of the membrane 10. It also includes a situation where an edge 11 is not envisaged.
The presence of two side plates is sometimes desirable, and sometimes pet. More often, the metal from which the base sheet 1 is molded is also suitable for using 1 for catholyte separation, or for anolyte separation. For example, when cells are connected in series, where aqueous solutions of sodium chloride / 1 are electrolyzed, to form caustic and / or hydrogen in the form of gas in the catholyte compartment, iron-containing materials, such as steel, for the metal components of the catholyte compartment for most workers teparayp cells and caustic concentration, for example, below about 22% caustic concentration and below about 85 ° C for workers TeNmur. Therefore, if the main
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Sheet 1 is made of iron material, such as steel, and if caustic is produced by npii Concentrations lower than about 22%, and the cell should work less than about 85 ° C, then the need for a protective cover a - The lithium side of sheet 1 for steel pickling from corrosion. However, on the anolithic side, a titanium Fate anolithic lining 0 is needed. In the middle of this flat, perforated metal cathode 5 (also made of steel for this variant) is welded directly by welding to the ends of the cathode lugs 2.
FIG. 2 and 3 catholyte lb are shown as a mirror image: +: sio CI-D on the anolyte side. The flange 3 forms the peripheral border of the catholyte compartment, while the base sheet 1 and the membrane 10 form its remaining edges. The spatially disposed cathode protrusions 2 are solid, having a frusto-conical configuration, protrusions extending outward from the base sheet 1 to the catholic compartment. The flat surface of the perforated steel plate of the cathode 5 is welded directly to the end face of the cathode protrusions 2.
FIG. 2 and 3, the catholic side of the lining is made of metal, which has a high resistance to corrosion of the catholyte compartment medium. The metal must have sufficient ductility and workability so that it can be extruded from one sheet of metal in the form of a non-planed mold. This includes the possibility of having recesses or caps 9, which are pressed into the sheet. The caps 9 are arranged so that they can be put on and around the cathode protrusions 2 located at a distance.
If these metals are incompatible by welding, then metal wafers or intermediate elements or a combination of intermediate elements that are compatible with metal welding of the plates 7 and the base sheet 1 should be used. These wafers 8 are located between the flat ends of the cathode lugs 2 and the internal ends of the cover caps 7, which correspond to the ends of the protrusions 2 and are welded to the ends of the cathode protrusions 2. 1) catholite facing 7 iipiii a; It goes to the ends of the cathode beams 2 through metaggers 8 K agS D 5 and then is welded to the pair ends of the caps 9. The connection of each cap of the facing 7 through the metal wafer 8 with the butt end of the cathode ledge 2 can be made only by one welded joint. m1:; a tall1-waffle itself should not be previously welded.
When serving in a brine cell, the cell has gpbast as follows. H-11111c h, r.assol is continuously injected into ill oligig.s from; through the pipeline through ppui.ojt ,, then xp: swelled water can BD ;,; iTi; CM to the kolgitpoy department of hrs.rs; from the pipeline Elektktrichesky current (straight; current) is passed through coc, r, iUieH ibie successively so that the anode of each electrolyzer r; ciiKii is polar relative to the cathode of the 3Tofi electrolytic cell.
G1: Cha ;, e polarized cathodes or anode, electrolysis occurs in the city; d.1. eleven:;; in a way. GA ora. Chlorine: g Prs rm;}: o Hojryi-asthms ui uiiionej ka- TuoHLi sodium passes through; ; embra- 11V 0 1 Catholicos office due to h. 1e) chtg ost, titskogo upl:; e 1i ka-G:-yes. T golnitnom branch Nene-P -; ; .. br; .cf. gas: p; i; :, i-. patji hydroxide solution ;; r,; iOoC: i4L; ji: i- H chlorine and exhausted; i; cp :: iiHo drink T1z anolitgo)) i.i, Mfciib i through the pipeline, tr1; l, as in t-azo-genes; hydrogen and hydroxide. the sodium is continuously coming out of the cathode section 1 and the pipe line .. /; electroplating} .. tlektr: -: m ;, crjrn is necessary; : tygo, t; -; - 1 force 1, s /: for 1 year laziness o // chsmknil 1zo; -cro;: a or, or oG). ; nx
Iri work connected ocj-ie; .i, oBa- cells in the form of the follower electrolyzer cells for the brine Natl and among other things, a certain area of PE: this condition. The anolyte compartment is preferably maintained at a pH of 0.5–5.0; the brine feed can only contain a small amount; the amount of multivalent cations (less than about 0.8 g / l D in terms of kalitsp); A higher concentration of polyvalent cations is dogusa with similarly successful results. -N1, if the feed-G brine contains carbon dioxide and concentrate. - Q
5248108
Rasch1N lower than about 70 ipn-, when the RP of the incoming brine is lower than 3.5 Working temperatures can be in the range of 0-250 ° C, but preferably at 60 ° C. Brine, purified from multivalent cations using ion exchange resins, after the usual brine treatment has been performed, is especially useful for increasing the service life of the membrane. It is desirable to have low iron content in the feed brine to prolong the life of the membrane. Preferably, the pH of the resulting brine is set below 4.0 by the addition of hydrochloric acid.
When the metal plate is used on both sides of the cell structure in the chlor-alkali cell, the catholyte side of the plate 7
five
20
The caustic concentration in the catholyte compartment is maintained above about 22 wt.% and the working temperature of the cell electrolyte is maintained by Bbmie approximately. Taka 1 Nickel Plate 7 is made in size and installed on the base sheet 1 in the same way as titanium glass 6 on the anolyte side. However, since nickel and steel are welding compatible, there is no need for the location of inter, n, and ni-t. metal slip; weft element 1shi waffles. But this does not mean that in the proposed invention, the use of welding compatible metal wafers is excluded between the cathode protrusions and the catholyte lining when there is an anolyte lining connected to the anol 11 g and the protrusions, or connected through the metal intermediate ale-ent or without them. The lining can be used on one side} i (}, on both sides or on either side of a single cell element.
In a known base sheet, it is made of plastic and the protrusions are made of plastic, these protrusions are not electrically conductive, so it is necessary to connect electrically the anode and the cathode, which is a household connection and complicates the design.
In the proposed invention, the execution of the base sheet of the electric wire
FIG. 2
FIG.
权利要求:
Claims (1)
[1]
Claim
A filter-press electrolyzer for the electrolysis of aqueous solutions of alkali metal chlorides, including bipolar electrodes consisting of anodes, cathodes and base sheets, the anode and cathode sides of which are provided with protrusions, the upper base of which is parallel to the sheet surface, ion-exchange membranes with sealing elements, characterized in that that, in order to simplify the design, the main sheet with the protrusions is made whole of metal, the anodes and cathodes are connected to the protrusions of the main sheet directly or through metal RP G electrode repeating form the base sheet with protrusions connected to the protrusions of the base sheet by welding through a metal plate welded to the metal v of the base sheet and plate, and mounted on the upper base of the projections, wherein the metal base sheet is selected from the group of iron, steel, stainless steel, nickel, aluminum, copper, chromium, magnesium, titanium, tantalum, cadmium, zirconium, lead, zinc, vanadium, tungsten, iridium, radium, cobalt and their alloys, the lining metal on the cathode side is selected from the range: nickel, its alloys , chrome, tantalum, titanium, admy, zirconium, lead, zinc, vanadium, tungsten, iridium, cobalt, and the metal gasket from the anode side is selected from the group of tantalum, titanium, niobium, hafnium, zirconium and their alloys "
Figure 1
类似技术:
公开号 | 公开日 | 专利标题
SU1524810A3|1989-11-23|Filter-press type electrolyzer
US5082543A|1992-01-21|Filter press electrolysis cell
US4138324A|1979-02-06|Metal laminate strip construction of bipolar electrode backplates
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US3755108A|1973-08-28|Method of producing uniform anolyte heads in the individual cells of a bipolar electrolyzer
US4244802A|1981-01-13|Monopolar membrane cell having metal laminate cell body
US3884792A|1975-05-20|Bipolar electrodes
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US3948750A|1976-04-06|Hollow bipolar electrode
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US4519888A|1985-05-28|Electrolytic cell
US4568434A|1986-02-04|Unitary central cell element for filter press electrolysis cell structure employing a zero gap configuration and process utilizing said cell
US5141618A|1992-08-25|Frame unit for an electrolyser of the filter press type and electrolysers of the filter-press type
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FI57275B|1980-03-31|ELEKTROLYTISK CELL
US4622113A|1986-11-11|Process for producing caustic alkalis
US4056459A|1977-11-01|Anode assembly for an electrolytic cell
同族专利:
公开号 | 公开日
HUT40711A|1987-01-28|
EP0137836A1|1985-04-24|
ZA841674B|1985-11-27|
DE3479819D1|1989-10-26|
KR890002257B1|1989-06-26|
HU201123B|1990-09-28|
CA1252065A|1989-04-04|
US4488946A|1984-12-18|
FI79146C|1989-11-10|
IN160120B|1987-06-27|
AU556195B2|1986-10-23|
FI844367A0|1984-11-07|
JPS6210313B2|1987-03-05|
JPS60501114A|1985-07-18|
BR8405816A|1985-02-20|
WO1984003523A1|1984-09-13|
KR850006660A|1985-10-14|
AU2660084A|1984-09-28|
FI79146B|1989-07-31|
EP0137836A4|1985-07-30|
EP0137836B1|1989-09-20|
FI844367L|1984-11-07|
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法律状态:
优先权:
申请号 | 申请日 | 专利标题
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