Double-chamber electrolytic bath structure for nitrogen removal by electrolyzing light salt brine

Abstract

The utility model discloses an electrolytic light salt brine denitrification double-chamber electrolytic bath structure, which relates to the technical field of electrolytic denitrification and comprises a cathode chamber, an anode chamber is arranged on one side of the cathode chamber, a connecting section is arranged between the cathode chamber and the anode chamber, an electrolytic film is arranged in the connecting section, and the electrolytic film is arranged in the connecting section. An electrolytic cathode is arranged on the side, away from the electrolytic film, of the interior of the cathode chamber, a feeding port is formed in the middle of the top of the cathode chamber in a penetrating mode, a first discharging pipe is arranged in the middle of the bottom of the cathode chamber, and an electrolytic anode is arranged on the side, away from the electrolytic film, of the interior of the anode chamber; a gas collecting opening is formed in the middle of the top of the anode chamber in a penetrating mode, a second discharging pipe is arranged in the middle of the bottom of the anode chamber, the double-chamber electrolytic bath is adopted, coupling co-electrolysis denitrification is achieved, stable circulation of materials of a whole plant is achieved, the resource utilization rate can be increased, cost reduction, efficiency improvement and clean production are achieved, and green transformation is energized.

Description

Technical Field

[0001] This utility model relates to the field of electrolytic denitrification technology, specifically to a dual-chamber electrolytic cell structure for denitrifying dilute brine. Background Technology

[0002] The chlor-alkali plant produces sodium hydroxide and chlorine gas by electrolyzing a saturated sodium chloride solution. The sodium hydroxide is then sent to the sodium cyanide plant to react with hydrogen cyanide to produce sodium cyanide. The sodium cyanide is then sent to the cyanuric chloride plant to react with chlorine gas to produce cyanuric chloride. The cyanuric chloride byproduct brine is purified in the wastewater plant and then returned to the chlor-alkali plant for recycling. During this material recycling process, NO3-, carbonates, and cyanide-containing substances accumulate due to the nitrogen-containing substances produced during the wastewater treatment process. This accumulation of carbonates and cyanide-containing substances affects subsequent production processes. Utility Model Content

[0003] The purpose of this invention is to provide a dual-chamber electrolytic cell structure for denitrification of dilute brine, in order to solve the problem mentioned in the background art of the impact of the accumulation of carbonates and cyanide-containing substances on subsequent production processes.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a dual-chamber electrolytic cell structure for denitrifying dilute brine, comprising a cathode chamber, an anode chamber on one side of the cathode chamber, a connecting section between the cathode chamber and the anode chamber, an electrolytic membrane inside the connecting section, an electrolytic cathode on the side of the cathode chamber away from the electrolytic membrane, a feed inlet penetrating through the top center of the cathode chamber, a first discharge pipe at the bottom center of the cathode chamber, an electrolytic anode on the side of the anode chamber away from the electrolytic membrane, a gas collection port penetrating through the top center of the anode chamber, and a second discharge pipe at the bottom center of the anode chamber.

[0005] Preferably, the cathode chamber is provided with connecting flanges on the side that contacts the connecting section, the anode chamber is provided with connecting section on the side that contacts the connecting section, and both sides of the connecting section. The cathode chamber, the connecting section, and the anode chamber are sequentially and sealed together by the connecting flanges. The side walls of the cathode chamber and the anode chamber are provided with reinforcing edges, and the height of the reinforcing edges is the same as that of the connecting flanges.

[0006] Preferably, the upper outer side of the electrolytic cathode is provided with a cathode connector penetrating the side wall of the cathode chamber, and the upper outer side of the electrolytic anode is provided with an anode connector penetrating the side wall of the anode chamber.

[0007] Preferably, the lower surfaces of both the cathode chamber and the anode chamber are provided with support seats, and the first discharge pipe and the second discharge pipe are both located inside the support seats.

[0008] Preferably, the upper end of the gas collection port is connected to a gas collection hood via a flange, and the upper end of the gas collection hood is provided with a gas processing pipe.

[0009] Compared with the prior art, the beneficial effects of this utility model are as follows: This process uses an electrochemical coupled electrolysis method to remove nitrate ions. It adopts a dual-chamber electrolytic cell, in which ammonium ions (NH4+) obtained by reducing nitrate ions in the cathode chamber are further oxidized into nitrogen gas in the anode chamber, realizing coupled co-electrolysis to denitrify and achieving stable circulation of materials throughout the plant. This can improve resource utilization, reduce costs and increase efficiency, and achieve clean production, thus empowering green transformation. Attached Figure Description

[0010] Figure 1 This is an isometric view of the main structure of this utility model;

[0011] Figure 2 This is a front sectional view of the main structure of this utility model;

[0012] Figure 3 This is a front view schematic diagram of the main structure of this utility model;

[0013] Figure 4 This is a left-side view of the main structure of this utility model;

[0014] Figure 5 This is a top view of the main structure of this utility model.

[0015] In the diagram: 1-Cathode chamber, 2-Anode chamber, 3-Connecting section, 4-Electrolytic membrane, 5-Electrolytic cathode, 6-Inlet, 7-No. 1 outlet pipe, 8-Electrolytic anode, 9-Gas collection port, 10-No. 2 outlet pipe, 11-Connecting flange, 12-Reinforcing edge, 13-Cathode connector, 14-Anode connector, 15-Support base, 16-Gas collection hood, 17-Gas treatment pipeline. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figure 1-5This utility model provides a dual-chamber electrolytic cell structure for denitrifying dilute brine, including a cathode chamber 1, an anode chamber 2 on one side of the cathode chamber 1, a connecting section 3 between the cathode chamber 1 and the anode chamber 2, an electrolytic membrane 4 inside the connecting section 3, an electrolytic cathode 5 on the side of the cathode chamber 1 away from the electrolytic membrane 4, a feed inlet 6 penetrating through the top center of the cathode chamber 1, a first discharge pipe 7 at the bottom center of the cathode chamber 1, an electrolytic anode 8 on the side of the anode chamber 2 away from the electrolytic membrane 4, a gas collection port 9 penetrating through the top center of the anode chamber 2, and a second discharge pipe 10 at the bottom center of the anode chamber 2.

[0018] In use, an electrolytic membrane 4 is installed between the cathode chamber 1 and the anode chamber 2 via a connecting section 3, allowing for rapid replacement of the electrolytic membrane 4. The solution to be electrolyzed is fed into the cathode chamber 1 through the feed inlet 6, and the solution is electrolyzed through the electrolytic cathode 5, catalytically reducing nitrate ions to ammonium ions. The treated solution is then transferred into the anode chamber 2 through the electrolytic membrane 4, and the remaining waste is discharged through the first discharge pipe 7. The treated solution continues to be processed inside the anode chamber 2 through the electrolytic anode 8, and the gas generated during the electrolysis process is collected through the gas collection port 9. The remaining waste is discharged through the second discharge pipe 10.

[0019] Cathode chamber: Nitrate is reduced to ammonia nitrogen (NH4+), 8H* (active hydrogen) + NO3 + 2H+ + 8e → NH4+ + 3H2O;

[0020] Anode chamber: Ammonia nitrogen (NH4+) is oxidized to nitrogen gas. The principle is chlorine free radical oxidation technology, which converts chloride ions in wastewater into CI free radicals, and then the CI free radicals oxidize ammonia to N20CI→CI.

[0021] 2NH4++6Cl·→N2+6CI+8H+.

[0022] Connecting flanges 11 are provided on the side of the cathode chamber 1 that contacts the connecting section 3, on the side of the anode chamber 2 that contacts the connecting section 3, and on both sides of the connecting section 3. The cathode chamber 1, the connecting section 3, and the anode chamber 2 are sequentially and sealed together by the connecting flanges 11. The side walls of the cathode chamber 1 and the anode chamber 2 are provided with reinforcing edges 12, the height of which is the same as that of the connecting flanges 11. The cathode chamber 1, the connecting section 3, and the anode chamber 2 are sequentially and sealed together by the connecting flanges 11. The reinforcing edges 12 are provided on the outer surfaces of the cathode chamber 1 and the anode chamber 2 to improve the overall structural strength of the equipment.

[0023] The upper outer side of the electrolytic cathode 5 is provided with a cathode connector 13 that penetrates the side wall of the cathode chamber 1. The electrolytic cathode 5 is connected to an external power source through the cathode connector 13. The upper outer side of the electrolytic anode 8 is provided with an anode connector 14 that penetrates the side wall of the anode chamber 3. The electrolytic anode 8 is connected to an external power source through the anode connector 14.

[0024] The lower surfaces of the cathode chamber 1 and the anode chamber 2 are both provided with support bases 15. The first discharge pipe 7 and the second discharge pipe 10 are both located inside the support bases 15. By setting the support bases 15, the entire equipment is lifted off the ground, leaving space for the installation of the first discharge pipe 7 and the second discharge pipe 10.

[0025] The upper end of the gas collection port 9 is connected to a gas collection hood 16 via a flange. The upper end of the gas collection hood 16 is provided with a gas processing pipe 17. The gas inside the gas collection port 9 is collected by the gas collection hood 16 and output to the outside through the gas processing pipe 17.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dual-chamber electrolytic cell structure for denitrifying dilute brine, characterized in that: The device includes a cathode chamber (1), an anode chamber (2) on one side of the cathode chamber (1), a connecting section (3) between the cathode chamber (1) and the anode chamber (2), an electrolytic membrane (4) inside the connecting section (3), an electrolytic cathode (5) on the side of the cathode chamber (1) away from the electrolytic membrane (4), a feed inlet (6) penetrating through the top center of the cathode chamber (1), a first discharge pipe (7) on the bottom center of the cathode chamber (1), an electrolytic anode (8) on the side of the anode chamber (2) away from the electrolytic membrane (4), a gas collection port (9) penetrating through the top center of the anode chamber (2), and a second discharge pipe (10) on the bottom center of the anode chamber (2).

2. The structure of a dual-chamber electrolytic cell for denitrification of brine according to claim 1, characterized in that: The cathode chamber (1) is provided with connecting flanges (11) on the side that contacts the connecting section (3), the anode chamber (2) is provided with connecting section (3) on the side that contacts the connecting section (3), and both sides of the connecting section (3). The cathode chamber (1), the connecting section (3), and the anode chamber (2) are sequentially sealed and connected by the connecting flanges (11). The side walls of the cathode chamber (1) and the anode chamber (2) are provided with reinforcing edges (12), and the height of the reinforcing edges (12) is the same as that of the connecting flanges (11).

3. The structure of a dual-chamber electrolytic cell for denitrification of brine according to claim 1, characterized in that: The upper outer side of the electrolytic cathode (5) is provided with a cathode connector (13) that penetrates the side wall of the cathode chamber (1), and the upper outer side of the electrolytic anode (8) is provided with an anode connector (14) that penetrates the side wall of the anode chamber (2).

4. The structure of a dual-chamber electrolytic cell for denitrification of brine according to claim 1, characterized in that: The lower surfaces of the cathode chamber (1) and the anode chamber (2) are provided with support bases (15), and the first discharge pipe (7) and the second discharge pipe (10) are both located inside the support bases (15).

5. The structure of a dual-chamber electrolytic cell for denitrification of brine according to claim 1, characterized in that: The upper end of the gas collection port (9) is connected to a gas collection hood (16) via a flange, and the upper end of the gas collection hood (16) is provided with a gas processing pipe (17).

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