MX2010004711A

MX2010004711A - Improvements in plastic electrolytic cell of bipolar type membrane.

Info

Publication number: MX2010004711A
Application number: MX2010004711A
Authority: MX
Inventors: Hermilo Tamez Salazar
Original assignee: Hermilo Tamez Salazar
Priority date: 2010-04-29
Filing date: 2010-04-29
Publication date: 2011-07-06
Also published as: UY33361A; AR080918A1; US20120285822A1; WO2011136630A1

Abstract

The improvements in a plastic electrolytic cell of bipolar type membrane are based on the structure configuration thereof, which allows the brine supply to be independently distributed, since it is also possible to survey in a visual manner the flow continuity through two restricting translucent hoses (5) of reduced diameter, the discharges of products being performed through two upper compartments (6) and (8), where the compartment (8) facilitates an over level for ensuring the filling of the anodic and cathodic deposit section (not shown), the same separating the turbulence area from the membrane area (not shown), and spilling the fluid through the translucent ringed hose (11), which acts as a spy hole and for breaking the leakage stream to the collector tube (12). The aforementioned improvement also refers to a reinforced structure with a protuberance, which is useful for maintaining the perpendicularity in the seal surfaces of the plastic injection (24) divisory integral plate of the anode and cathode compartments in the plastic frame (1), in the joints of the aforementioned reinforcements (not shown) grid, a post (20) being projected for supporting the meshes (15) of the anode and cathode so as to maintain the perpendicularity of the following cell, and the minimum separation between active electrodes required for achieving a reduced voltage fall of the electrolytic cell, which results in a higher current efficiency and electric power (KWh) savings.

Description

I JUDGE A CELL ELECTROLYTIC PLASTIC MEMBRANE TYPE BIPOLAR DESCRIPTION OBJECT OF THE INVENTION The object of this invention refers mainly to a structural improvement in a plastic electrolytic cell, which allows it to have a greater functionality and efficiency of operation of electrolysis for obtaining chlorine, alkalis and a variety of products through the use of a Activated titanium electrode and cathode made of steel or activated nickel or other metals suitable for the process and conventional ion exchange membranes and in addition to other uses in electrolysis and electro-oxidation processes of chemical solutions.

BACKGROUND There are different types of electrolytic cells to date, such is the case of the Mexican patent number PA / A / 2003/008797, entitled ANODIC STRUCTURE FOR MERCURY CATALOG ELECTROLYTIC CELLS, which refers to an anodic structure for cells mercury cathode for the industrial electrolysis of sodium chloride, which is constituted by a grid comprising a multiplicity of blades disposed vertically and reciprocally parallel, coated with an electrocatalytic coating specific for the discharge of chlorine, where the objective of the invention is to reduce consumption at the same time.

There is also the Canadian patent with number 1076994 entitled MOLDING, PRESERVING FORMS AND RESISTANT ELECTROLYTIC PLASTIC CELL, FILLING WITH THE PLASTIC CELL FRAME, which includes a plurality of inlet and outlet mouths for the electrolytic process liquids and the medium assembly for the components of the positioned cell, such as the electrodes and the membrane, wherein the passages and headers, molded into the cells, transport the water and feedings from the brine to the cathode and anode compartments, respectively, preferably to Through measuring holes, and overflows of these compartments automatically maintain desired levels of electrolyte that when used help to minimize current leaks. Another case is the Spanish patent with number U0296350, entitled IONIC EXCHANGE MENBRANE FOR AN ELECTROLYTIC CELL, which refers only to an ion exchange membrane for an electrolytic cell, comprising at least one layer of a first material intended to be used as ion exchange membrane and at least one layer of a second material intended to reinforce the membrane, said reinforcing layer being attached to at least one face of the membrane around a peripheral surface of the sealing membrane carrier membrane.

The references cited above refer to cells whose structure differs from the one requested, since they are very different and allows the independent distribution of the feeds at the same time, since it is also possible to visually inspect through the translucent restrictor hoses, the continuity of the flow , just as it is the same case as product discharges through a superior compartment that allows an over-level that ensures the filling of the anodic and cathodic deposit section and separates the turbulence zone from the membrane area, spilling over the translucent ringed hose that acts as a peephole and to break the leakage current to the collector tube.

Our improvement also refers to a reinforced structure with protuberances, which serve to maintain the perpendicularity of the seal faces of the anode and cathode compartments partition plate of the plastic frame and also in the crossings of the grid of the aforementioned reinforcements a post that serves as support to the meshes of the anode and cathode to maintain the flatness and minimum separation between the electrodes that is required to achieve a lower voltage drop of the electrolytic cell that translates into greater efficiency and saving of electrical energy (KWh) .

BRIEF DESCRIPTION OF THE FIGURES Figure 1 is a front view of the bipolar membrane type electrolytic plastic cell, where most of the parts that make it up are shown Figure 2 is a side view of the cell.

Figure 3A is a cross-sectional view of the right side arrangement of two pressed cells Figure 3B is a cross-sectional view of the left side arrangement of two pressed cells DETAILED DESCRIPTION OF THE INVENTION The improvements to this bipolar type membrane electrolytic plastic cell are based on the configuration of its structure, which allows the independent distribution of the brine feeds, through the use of an activated titanium electrode and activated nickel or steel cathode. or other metals suitable for the process and ion exchange membranes and in addition to other uses in electrodialysis and electro-oxidation processes of chemical solutions, since it is also possible to visually inspect the flow continuity through the two translucent (5) restrictor hoses of smaller diameter, as well as the same case as the product discharges through the two upper compartments (6) and (8), where the compartment (8) is the one that allows an over-level that ensures the filling of the section of the anodic and cathodic deposit (not shown) and separates the zone of turbulence from the area of the membrane (not shown) pouring down the translucent ringed hose (11) which acts as a peephole and to break the leakage current to the collection pipe (12).

Our improvement also relates to a reinforced structure with a protrusion, which serve to maintain the perpendicularity of the seal faces of the integral plastic injection partition plate (24) of anode and cathode compartments of the plastic frame (1) and also in the crosses of the grid of the reinforcements (not shown), a post (20) is projected that serves as support to the meshes (15) of the anode and cathode to maintain the perpendicularity of the next cell, and the minimum separation between the electrodes that is required to achieve a lower voltage drop of the electrolytic cell which results in higher current efficiency and electric power savings (KWh).

In Fig. 1 we can see the structure or preferably rectangular plastic frame (1) indicating the perimeter limit of the cell, where the low relief or depth (2) is indicated, over the entire surface of the frame that allows the formation of the deposit of the anode, where on one of its lower side faces the integrated section of the distributor pipe (3) integrated to the plastic frame (1) is represented and that by means of the connector (4) and the restrictor hose (5) flow is fed brine to the anode reservoir, the feed flow is restricted to maintain a residence time required for the electrolysis reaction, and a restriction for leakage of current to the distributor (3), the brine exhausted and the products ascend being blocked by the section upper left (6) which has no communication with the deposit of the anode of low relief since it is blind, and allowing the discharge of products and gases through the four perforations (7) that communicate to the upper right compartment that is the separator of gases and liquid (8), the feed to the anode reservoir can be among others depending on the electrolytes used, TREATED SALMON (SODIUM CHLORIDE OR POTASSIUM CHLORIDE) and the discharges or products, CHLORINE GAS, SOLDERED SALMON or others depending on the electrolytes , and on the side of the cathode tank, with the same descriptions of parts of the anode, but different materials and feed of TREATED WATER and the discharges or products, CAPACITY, POTASS, HYDROGEN or other depending on the electrolytes, together with a recirculation of SOSA or POTASS depending on the electrolytes, for cooling the cells through the same water distributor tube to the water tank all, which in turn spill the electrolyte reacted by the two perforations (9), and which has a flange type connection (10), and a translucent ringed hose that acts as a peephole (11), to discharge to the collector pipe section (11). 12) which forms with the grouping of plastic frames (1) pressed in series, said general cell collector is integrated into the plastic frame (1) in the upper right part. The structure and configuration of the plastic frame (1), in addition to having independent integral discharges, also has a hose connector (13) in the lower part of the cell discharge, to install a sample that allows to analyze the products before of mixing in the general collector, which determines the efficiency of the cell reaction. The anode and cathode electrodes have a plurality of contacts (14) that are welded around their diameter to the mesh (15), which covers the entire surface of the cell which is shown in a single section corresponding to the anode electrode activated. The contact (16) is shown to come from the cathode electrode which has the same descriptions and parts shown for the activated anode electrode, it should be mentioned that only the materials of the contacts (14) and the mesh (15) are different by the characteristics of the reaction, the union of the electrodes of the activated anode and cathode that may or may not be activated, is carried out in a conventional manner with screws and gaskets (not shown) that make electrical contact between them, by means of a plurality of perforations ( 17) evenly distributed across the surface of the cell below the mesh (15), as a function of the equal number of even contacts (14) and (16). The upper support of the plastic frame (19), allows the separation and sliding of the plastic electrolytic cells with bipolar membrane along a lower insulating rail (not shown) of the cell module (not shown), without losing the required verticality to maintain the grouping while pressing the cells. It should be mentioned that in the lower part of the plastic electrolytic cells with a bipolar membrane, two wheels (26) are integrated to slide them in a pressed module. The plastic frame (1) also presents a series of holes (25) where small plastic bolts are placed which serve as support (not shown) to the gaskets and the membrane, which allow it to coincide with other perforations in the same position in order to be able to join two plastic frames with their respective anodes and cathodes, if affect the seal area of the compartments.

In Figure 2 we can see a side view showing the integration of the lower distributor tube (3) and restrictor hose (5) flow, discharge hose (11) and upper general collector pipe (12).

Figure 3A shows a side section of the anode indicating two plastic frames (1) where you can see an arrangement that contains between each plastic frame a conventional ion exchange membrane (22), which covers the entire surface of the meshes (15) including up to the perimeter area forming the lower plastic frame of the cell to make seal on both sides with the gaskets (21), which also make an integral seal with the sections of the upper deposits of the products and gases ( 8). The figure also shows a detail cut of the perforations (7) communicating to the aforementioned upper compartments. The figure also shows the integral plastic injection dividing plate (24) that separates the compartments of the anode and cathode and has an arrangement of protuberances or reinforcements that besides the inherent resistance of the injection material to be polypropylene or other thermoplastic for high mechanical and temperature resistance, a distribution of squared integral reinforcements is added. Figure 3B shows the lateral cut of the cathode indicating two equal plastic frames (1), and the same parts as figure 3. The use of our device is not intended to be limiting to the applications mentioned but to claim all other than using the same device obtain the aforementioned purposes.

Claims

CLAIMS Having sufficiently described my invention, I consider it a novelty and therefore claim as my exclusive property, what is contained in the following clauses:

1. Improvements to a bipolar-type membrane electrolytic plastic cell, characterized in that it consists of at least one preferably rectangular plastic frame (1) indicating the perimeter limit of the cell where the low relief or depth (2) is indicated on the entire surface of the frame that allows the formation of the anode reservoir, where on one of its lower side faces is represented the integrated section of at least one distributor tube (3) integrated to the plastic frame (1) and that by means of the connector (4) and the restricting flow hose (5) is fed from brine to the anode reservoir, where the feed flow is restricted to maintain a residence time required for the electrolysis reaction, and a restriction for leakage of current to the distributor (3), and the brine exhausted and the products ascend being blocked by the upper left section (6) which has no communication with the lower anode reservoir. or relief as it is blind, and allowing the discharge of products and gases through the four perforations (7) that communicate to the upper right compartment that is the gas and liquid separator (8), which in turn spill the electrolyte reacted by the two perforations (9), and having a flange-type connection (10), and a translucent ringed hose that acts as a peephole (11), to discharge to the collector tube section (12) that forms with the grouping of plastic frames (1) pressed in series, wherein at least one general cell collector is integrated into the plastic frame (1) in the upper right part; the activated anode and cathode electrodes, which may or may not be activated, have a plurality of contacts (14) that are welded around their diameter to the mesh (15), which covers the entire surface of the cell in a single corresponding section to the electrode of the activated anode, where the contact (16) comes from the electrode of the cathode which has the same descriptions and parts for the electrode of the activated anode; the upper support (19) of the plastic frame allows the separation and sliding of the plastic electrolytic cells with bipolar membrane along a lower insulating rail (not shown) of the cell module (not shown), without losing the required verticality to maintain the grouping while pressing the cells; also in the lower part of the cell two wheels (26) are integrated for the sliding of the same in a pressed module.

2. Improvements to bipolar membrane type electrolytic plastic cell, according to claim 1, characterized in that the anode and cathode electrodes are joined by means of screws and gaskets that make electrical contact between them, by means of a plurality of perforations ( 17) evenly distributed across the surface of the cell below the mesh (15), as a function of the equal number of even contacts (14) and (16).

3. Improvements to bipolar type membrane electrolytic plastic cell, according to claim 1, characterized in that at least one preferably rectangular plastic frame (1), in addition to having independent integral discharges, also has a hose connector (13) in the bottom part of the cell discharge, to install a sample that allows to analyze the products before mixing in the general collector, which determines the efficiency of the cell reaction. In Figure 2 we can see a side view showing the integration of the lower distributor tube (3) and restrictor hose (5) flow, discharge hose (11) and upper general collector pipe (12).

4. Improvements to bipolar type membrane electrolytic plastic cell, according to claim 1, characterized in that at least one preferably rectangular plastic frame (1) also has a series of holes (25) where small plastic pins are placed that serve as support for the gaskets and the membrane, which allow it to coincide with other perforations in the same position in order to join two frames plastics with their respective anodes and cathodes, if they affect the seal area of the compartments.

5. Improvements to bipolar type membrane electrolytic plastic cell, according to claim 1, characterized in that at least one preferably rectangular plastic frame (1), contains between each plastic frame an ion exchange membrane (22), which covers all the surface of the meshes (15) including up to the perimeter area forming the lower plastic frame of the cell to make seal on both sides with the packages (21), which also make an integral seal with the sections of the upper deposits of the products and gases (8).

6. Improvements to a bipolar type membrane electrolytic plastic cell, according to claim 1, characterized in that at least one preferably rectangular plastic frame (1) has an integral plastic injection dividing plate (24) that separates the compartments of the anode and cathode and that has an arrangement of protuberances or reinforcements that in addition to the inherent resistance of the injection material to be polypropylene or other thermoplastic for high mechanical strength and temperature, is added a distribution of quadriculated integral reinforcements.