An automatic control device for brine flow in an electrolytic cell

Abstract

This invention discloses an automatic control device for brine flow in an electrolytic cell, belonging to the field of electrolytic cell technology. It includes an electrolytic cell body with two sets of batteries installed on its side. A positive electrode is installed on one side of the interior of the electrolytic cell body, and a negative electrode is installed on the other side. The positive and negative electrodes are electrically connected to the batteries via wires. A self-filtering flow measurement and sampling mechanism is installed at the center of the side of the electrolytic cell body, and a feeding mechanism is installed on the upper side of the electrolytic cell body. This invention, by incorporating a self-filtering flow measurement and sampling mechanism, relies on the internal filter screen of the filter assembly to intercept salt mud impurities. Combined with a drain pipe and valve for periodic slag discharge, it avoids blockage of the sampling pipeline from the source, resulting in accurate and stable sampling data. This solves the defects of traditional external flow meters, such as easy clogging and inaccurate flow detection, providing reliable data for automatic flow control.

Description

Technical Field

[0001] This invention belongs to the field of electrolytic cell technology, and specifically relates to an automatic control device for brine flow in an electrolytic cell. Background Technology

[0002] In the electrolytic cell production process of the chlor-alkali industry, saturated refined brine is the core raw material for electrolysis. The stability of the brine feed flow rate directly determines the electrolysis conditions, cell voltage, and ion membrane lifespan. The industry generally adopts a control mode of pipeline feeding combined with external flow meter monitoring of flow rate. Flow rate adjustment is completed manually or electrically by regulating valves. It is an indispensable supporting control system for electrolysis production.

[0003] Most existing conventional electrolytic cell brine feed control systems adopt an external split-type flow meter for separate flow measurement and a standard straight-through pipeline for feed, lacking a pre-filter sampling structure and an in-pipe mechanical flow slowing and regulating structure. On the one hand, the flow meter sampling pipeline is easily blocked by salt mud and crystallized salt, causing distortion of the flow data and making it impossible to accurately reflect the actual feed flow. On the other hand, the feed pipeline lacks built-in throttling and slowing components, and the brine flow rate increases and decreases instantaneously when the feed pressure fluctuates. It can only rely on manual fine-tuning of the downstream valve, resulting in low automation, lagging flow control, and frequent fluctuations in feed flow rate, which can easily cause pH imbalance in the electrolytic cell, unstable electrode load, and accelerated corrosion and wear of the ion exchange membrane. Summary of the Invention

[0004] To address the problems mentioned in the background section, this invention provides an automatic control device for brine flow in an electrolytic cell, featuring anti-clogging sampling, real-time automatic flow regulation, good sealing, and stable operation.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an automatic control device for brine flow in an electrolytic cell, comprising an electrolytic cell body, two sets of batteries installed on the side of the electrolytic cell body, a positive electrode installed on one side of the interior of the electrolytic cell body, a negative electrode installed on the other side of the interior of the electrolytic cell body, the positive electrode and the negative electrode being electrically connected to the batteries via wires, a self-filtering flow measurement and sampling mechanism installed at the center of the side of the electrolytic cell body, and a feeding mechanism installed on the upper side of the electrolytic cell body; The self-filtering flow measurement and sampling mechanism includes a sampling tube. A sampling tube is installed at the center of the side of the electrolytic cell body. A valve is installed on the side of the sampling tube. A filter chamber is installed at the other end of the sampling tube. An installation plate is installed on the side of the filter chamber. A discharge pipe is installed on the other side of the installation plate. The filter chamber and the installation plate are fixedly connected by bolts. A filter assembly is provided at the connection between the filter chamber and the installation plate.

[0006] Preferably, the self-filtering flow measurement and sampling mechanism further includes a drain pipe, with a drain pipe installed at the lower end of the filter chamber and a valve two provided on the side of the drain pipe.

[0007] Preferably, the filter assembly includes a filter screen, a filter screen is provided at the connection between the filter chamber and the mounting plate, a sealing ring is installed on both sides of the filter screen, and a sealing groove corresponding to the sealing ring is opened on the side of the filter chamber and the mounting plate.

[0008] Preferably, the filter assembly further includes arc-shaped protrusions, and multiple sets of arc-shaped protrusions are installed on the side of the sealing ring one, and arc-shaped grooves corresponding to the arc-shaped protrusions are opened on the side of the sealing groove one.

[0009] Preferably, both ends of the positive electrode and the negative electrode are equipped with flanges, and the flanges are fixedly connected to the main body of the electrolytic cell by bolts.

[0010] Preferably, the feeding mechanism includes a feeding pipe, which is installed at the upper end of the electrolytic cell body. A feeding hopper is provided on the upper side of the feeding pipe, and a flow-retarding component is installed at the center of the upper end of the feeding pipe.

[0011] Preferably, the feeding mechanism further includes an installation ring, an installation ring is installed on the upper side of the electrolytic cell body, a flange is installed on the lower surface of the feeding pipe, and the feeding pipe and the flange are fixedly connected by bolts.

[0012] Preferably, the feeding mechanism further includes a second sealing ring, a second sealing ring is installed at the upper edge of the mounting ring, and a second sealing groove corresponding to the second sealing ring is opened at the lower end of the flange.

[0013] Preferably, the slow-flow component includes a drive component, the upper end of the feed pipe is equipped with the drive component, the lower end of the drive component is located inside the feed pipe and a rotating shaft is provided, and the surface of the rotating shaft is provided with helical blades.

[0014] Preferably, the drive assembly includes a mounting box, the upper end of the feed pipe is mounted with the mounting box, the side of the mounting box is mounted with a motor, the output end of the motor is provided with a bevel gear one, the side of the bevel gear one is mounted with a bevel gear two, and the bevel gear two is mounted on the upper surface of the rotating shaft.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention incorporates a self-filtering flow measurement and sampling mechanism. By relying on the internal filter screen of the filter component to intercept salt mud impurities, and in conjunction with the sewage pipe and valve for periodic slag discharge, it avoids blockage of the sampling pipeline from the source. The sampling data is accurate and stable, solving the defects of traditional external flow meters that are prone to clogging and have inaccurate flow detection, and providing reliable data acquisition for automatic flow control.

[0016] 2. This invention incorporates a feed flow slowing mechanism, which uses a motor to drive a gear pair to rotate the rotating shaft and spiral blades. By changing the cross-sectional area of ​​the feed pipe, it automatically throttles and controls the flow. Based on the flow data fed back by the sampling mechanism, it autonomously adjusts the feed rate in real time, eliminating the need for frequent manual operation. This effectively buffers the sudden changes in flow rate caused by fluctuations in feed pressure, stabilizes the brine flow rate into the electrolytic cell, and protects the electrodes and ion exchange membrane of the electrolytic cell. Attached Figure Description

[0017] Figure 1 This is a perspective view of the present invention; Figure 2 This is a three-dimensional sectional view of the electrolytic cell of the present invention; Figure 3 This is an enlarged view of the self-filtering flow measurement and sampling mechanism of the present invention; Figure 4 This is a perspective view of the feed flow slowing mechanism of the present invention; Figure 5 This is an enlarged view of the feed flow slowing mechanism of the present invention; Figure 6 This is a three-dimensional sectional view of the feed pipe of the present invention; Figure 7 For the present invention Figure 6 Enlarged view of point A in the middle; In the diagram: 1. Electrolytic cell body; 2. Feeding mechanism; 21. Feed hopper; 22. Flow control assembly; 221. Drive assembly; 2211. Mounting box; 2212. Bevel gear two; 2213. Bevel gear one; 2214. Motor; 222. Spiral blade; 223. Rotating shaft; 23. Feed pipe; 24. Mounting ring; 25. Bolt three; 26. Sealing ring two; 27. Flange two; 28. Sealing groove two; 3. Battery ; 4. Self-filtering flow measurement and sampling mechanism; 41. Sampling tube; 42. Valve 1; 43. Drain pipe; 44. Valve 2; 45. Discharge pipe; 46. Mounting plate; 47. Bolt 2; 48. Filter assembly; 481. Filter screen; 482. Sealing ring 1; 483. Arc-shaped protrusion; 484. Sealing groove 1; 485. Arc-shaped groove; 49. Filter chamber; 5. Positive electrode; 6. Flange 1; 7. Bolt 1; 8. Negative electrode. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see Figure 1-7The present invention provides the following technical solution: an automatic control device for brine flow in an electrolytic cell, comprising an electrolytic cell body 1, which serves as the equipment base and provides an installation reference for other components; two sets of batteries 3 are installed on the side of the electrolytic cell body 1, positioned on the left and right sides of the cell sidewall, providing power to the entire flow detection and adjustment components; a positive electrode 5 is installed on one side of the interior of the electrolytic cell body 1, arranged vertically along the inner cavity of the electrolytic cell body 1; a negative electrode 8 is installed on the other side of the interior of the electrolytic cell body 1, parallel to and opposite the positive electrode 5. The arrangement and coordination form an electrolysis reaction chamber; the positive electrode 5 and the negative electrode 8 are electrically connected to the storage battery 3 through wires, and the operating conditions of the electrodes can be fed back to the electronic control terminal to indirectly assist in correcting the brine feed flow rate; a self-filtering flow measurement and sampling mechanism 4 is installed at the center of the side of the electrolysis cell body 1, which is horizontally connected to the middle of the tank body to extract sample liquid in real time to monitor the instantaneous flow rate of brine; a feeding mechanism 2 is installed on the upper side of the electrolysis cell body 1, which is vertically fixed to the feed inlet at the top of the tank body, and automatically adjusts the brine feed flow rate according to the feedback data from the sampling mechanism.

[0020] See Figure 1-3 The self-filtering flow measurement and sampling mechanism 4 includes a sampling tube 41, which is horizontally installed and fixed at the opening on the side wall of the electrolytic cell body 1. The sampling tube 41 is installed at the center of the side of the electrolytic cell body 1, and its inner end connects to the inner cavity of the electrolytic cell, directly leading out the brine sample from the cell. A valve 42 is installed on the side of the sampling tube 41, which is fitted onto the section of the sampling tube 41 near the cell wall, allowing for the cutting off of the sampling path and facilitating the maintenance of the flow detection components. A filter chamber 49 is installed at the other end of the sampling tube 41, fixed to the outer end of the sampling tube 41, for pre-treatment of the sampled brine to remove impurities. The filter chamber 49 is installed on the side... There is an installation plate 46, which is sealed on the outer end face of the filter chamber 49 to form a closed filter cavity. A discharge pipe 45 is installed on the other side of the installation plate 46, which is connected to the brine return pipeline. The filtered sample liquid is returned, and the total feed volume is calculated based on the sample liquid flow rate. The filter chamber 49 and the installation plate 46 are fixedly connected by bolts 47, which are evenly distributed around the circumference of the installation plate 46. The internal flow measurement accessories can be replaced by disassembly and assembly. A filter assembly 48 is provided at the connection between the filter chamber 49 and the installation plate 46. The filter assembly 48 is clamped on the contact surface of the two to filter out salt mud and avoid impurities from clogging and affecting the flow rate acquisition accuracy.

[0021] See Figure 1-3 The self-filtering flow measurement and sampling mechanism 4 also includes a drain pipe 43, which is connected downwards to the bottom of the filter chamber 49. The drain pipe 43 is installed at the lower end of the filter chamber 49. The sedimented impurities in the chamber are collected by gravity to the opening of the drain pipe 43. A valve 44 is installed on the side of the drain pipe 43. The valve 44 controls the start and stop of the drain, regularly discharges sludge to prevent the filter screen from clogging, and ensures continuous and stable flow sampling.

[0022] See Figure 1-3 The filter assembly 48 includes a filter screen 481, which is vertically snapped into the cavity between the filter chamber 49 and the mounting plate 46. The filter screen 481 is installed at the connection between the filter chamber 49 and the mounting plate 46, and all the brine flowing through the sampling pipeline passes through the filter screen 481 for filtration. A sealing ring 482 is installed on both sides of the filter screen 481. The sealing ring 482 covers the outer end face of the filter screen 481 and plays a role in sealing and preventing leakage. The sides of the filter chamber 49 and the mounting plate 46 are provided with sealing grooves 484 corresponding to the sealing ring 482. The sealing ring 482 is snapped into the sealing groove 484 to prevent brine leakage and distortion of flow acquisition data.

[0023] See Figure 1-3 The filter assembly 48 also includes arc-shaped protrusions 483, which are uniformly arranged in a ring on the outer wall of the sealing ring 482. Multiple sets of arc-shaped protrusions 483 are installed on the side of the sealing ring 482, and the protrusion structure improves the tightness of the sealing ring. The side of the sealing groove 484 is provided with arc-shaped grooves 485 corresponding to the arc-shaped protrusions 483. The arc-shaped protrusions 483 are embedded in the arc-shaped grooves 485 to achieve limiting sealing and prevent sampling leakage from interfering with the flow control parameters.

[0024] See Figure 2 Both ends of the positive electrode 5 and the negative electrode 8 are equipped with flanges 6, which seal the electrode mounting holes on the upper and lower parts of the tank. The flanges 6 are fixedly connected to the main body of the electrolytic cell 1 by bolts 7. The bolts 7 lock the flanges to prevent electrolyte leakage from causing changes in electrolysis conditions and abnormal flow.

[0025] See Figure 4-7 The feeding mechanism 2 includes a feeding pipe 23, which is vertically connected to the top feed inlet of the electrolytic cell body 1 and is the main channel for brine to enter the cell. The feeding pipe 23 is installed at the upper end of the electrolytic cell body 1, and the lower section of the feeding pipe 23 is embedded in the opening on the top surface of the cell. A feeding hopper 21 is provided on the upper side of the feeding pipe 23. The feeding hopper 21 is laterally opened on the upper side wall of the feeding pipe 23 for brine introduction. A flow-slowing component 22 is installed at the center of the upper end of the feeding pipe 23. The flow-slowing component 22 extends into the cavity of the feeding pipe 23 and automatically adjusts the flow rate by changing the flow area through spiral rotation.

[0026] See Figure 5The feeding mechanism 2 also includes an installation ring 24, which is fixed on the upper end face of the electrolytic cell body 1 and the periphery of the feed pipe 23. The installation ring 24 is installed on the upper side of the electrolytic cell body 1 and serves as a bearing base for flange assembly. A flange 27 is installed on the lower end surface of the feed pipe 23 and is coaxially fixed to the bottom outer ring of the feed pipe 23. The feed pipe 23 and the flange 27 are fixedly connected by bolts 3 25, which are circumferentially locked to achieve a sealed connection between the feed pipe 23 and the installation ring 24.

[0027] See Figure 5 The feeding mechanism 2 also includes a second sealing ring 26, which is laid flat and fixed on the upper ring surface of the mounting ring 24. The second sealing ring 26 is installed at the upper edge of the mounting ring 24, and the second sealing ring 26 is directly opposite the sealing groove 28 of the upper flange 27. The lower end of the flange 27 has a corresponding sealing groove 28 for the second sealing ring 26. The second sealing ring 26 is inserted into the sealing groove 28 to prevent leakage at the feed pipe joint and avoid the actual feed flow rate from being lower than the set value.

[0028] See Figure 6 The slow-flow component 22 includes a drive component 221, which is mounted at the top of the feed pipe 23. The drive component 221 is installed at the upper end of the feed pipe 23 and receives the flow signal from the filter-type flow measurement and sampling mechanism 4 to start, stop and adjust the speed. The lower end of the drive component 221 is located inside the feed pipe 23 and has a rotating shaft 223. The rotating shaft 223 extends downward along the axis of the feed pipe 23 to the middle section of the pipe cavity. The surface of the rotating shaft 223 is provided with spiral blades 222. The spiral blades 222 rotate with the shaft to change the cross-sectional area of ​​the brine flow, thereby automatically increasing or decreasing the feed flow rate.

[0029] See Figure 7 The drive assembly 221 includes a mounting box 2211, which is enclosed and fixed to the outer wall of the top end of the feed pipe 23. The mounting box 2211 is installed at the upper end of the feed pipe 23, providing a sealed protective space for the internal gear components. A motor 2214 is installed on the side of the mounting box 2211, which is horizontally fixed to the outside of the mounting box 2211 and is controlled by the flow signal to start, stop and change speed. A bevel gear 1 2213 is provided at the output end of the motor 2214, which is coaxially connected to the output shaft of the motor 2214. A bevel gear 2212 is installed on the side of the bevel gear 1 2213, and the bevel gear 2212 meshes with the bevel gear 1 2213 for transmission. The bevel gear 2212 is installed on the upper surface of the rotating shaft 223, and the gear transmission drives the rotating shaft 223 and the spiral blade 222 to rotate synchronously, completing the automatic flow control.

[0030] The working principle and usage process of this invention: When using this invention, the brine is first fed into the feed pipe 23 through the feed hopper 21. The power supply for the entire set of equipment is uniformly supplied by the storage battery 3. The self-filtering flow measurement and sampling mechanism 4 continuously collects the real-time flow data of the brine inside the electrolytic cell online.

[0031] In the first step, a portion of the brine in the tank is drawn out through the sampling pipe 41, and valve 1 42 is opened to connect the sampling pipeline. The sample liquid is sent into the filter chamber 49, where it is filtered out by the filter screen 481 to remove salt mud impurities. The filtered brine flows back through the discharge pipe 45. The flow rate of the whole machine is calculated based on the parameters of the returned sample liquid, and the real-time flow signal is transmitted to the motor 2214. The salt mud impurities accumulated at the bottom of the filter chamber 49 can be discharged outward through the drain pipe 43 by opening valve 2 44 at regular intervals to avoid the filter screen 481 from clogging and causing flow detection distortion.

[0032] In the second step, the motor 2214 matches its speed according to the received flow signal. The motor 2214 outputs power to drive the first bevel gear 2213 to rotate. Through the meshing second bevel gear 2212, it drives the rotating shaft 223 to rotate synchronously. The spiral blades 222 on the outside of the rotating shaft 223 rotate accordingly. When the measured flow rate is higher than the set standard value, the motor 2214 speeds up, and the spiral blades 222 block the flow area of ​​the feed pipe 23, increasing the flow rate and reducing the flow of brine into the tank. When the measured flow rate is lower, the motor 2214 speeds up, and the spiral blades 222 make room for flow, increasing the flow area of ​​the pipeline and increasing the feed flow rate. The feed flow rate is dynamically and autonomously adjusted by mechanical linkage.

[0033] The third step involves flange 6 and flange 27 working together with various sealing ring components to ensure the sealing of the entire pipeline. Sealing ring 482 relies on the arc-shaped protrusion 483 and arc-shaped groove 485 to lock and seal, while sealing ring 26 is embedded in sealing groove 28, eliminating flow measurement errors caused by brine leakage. Changes in the electrolysis conditions of positive electrode 5 and negative electrode 8 will also provide reverse feedback parameters to help correct the flow control benchmark. The entire device forms a closed-loop automatic control system of sampling and detection, signal feedback, and mechanical throttling, which stably controls the brine flow rate entering the electrolytic cell.

[0034] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An electrolytic tank salt water flow automatic control device, comprising an electrolytic tank body (1), two groups of storage batteries (3) are installed on the side of the electrolytic tank body (1), a positive electrode (5) is installed on one side of the inside of the electrolytic tank body (1), a negative electrode (8) is installed on the other side of the inside of the electrolytic tank body (1), the positive electrode (5) and the negative electrode (8) are electrically connected with the storage batteries (3) through wires, characterized in that: The side center position of the electrolytic cell body (1) is provided with a self-filtering flow sampling mechanism (4), and the upper end side of the electrolytic cell body (1) is provided with a feeding mechanism (2). The self-filtering flow sampling mechanism (4) comprises a sampling pipe (41), the side center position of the electrolytic cell body (1) is provided with the sampling pipe (41), the side of the sampling pipe (41) is provided with a valve I (42), the other end of the sampling pipe (41) is provided with a filter bin (49), the side of the filter bin (49) is provided with a mounting disc (46), the other side of the mounting disc (46) is provided with a discharge pipe (45), the filter bin (49) and the mounting disc (46) are fixedly connected through a bolt II (47), and the filter bin (49) and the mounting disc (46) are provided with a filter assembly (48).

2. The automatic control device for the flow of brine in an electrolytic cell according to claim 1, characterized in that: The self-filtering flow sampling mechanism (4) further comprises a blowdown pipe (43), the lower end of the filter bin (49) is provided with the blowdown pipe (43), and the side of the blowdown pipe (43) is provided with a valve II (44).

3. The automatic control device for the flow of brine in an electrolytic cell according to claim 1, characterized in that: The filter assembly (48) comprises a filter screen (481), the connection position of the filter bin (49) and the mounting disc (46) is provided with the filter screen (481), the two side edges of the filter screen (481) are provided with sealing rings I (482), and the side of the filter bin (49) and the mounting disc (46) is provided with a sealing groove I (484) corresponding to the sealing ring I (482).

4. The automatic control device for the flow of brine in an electrolytic cell according to claim 3, characterized in that: The filter assembly (48) further comprises an arc-shaped protrusion (483), a plurality of arc-shaped protrusions (483) are arranged on the side of the sealing ring I (482), and an arc-shaped groove (485) corresponding to the arc-shaped protrusion (483) is arranged on the side of the sealing groove I (484).

5. The automatic control device for the flow of brine in an electrolytic cell according to claim 1, characterized in that: The two ends of the positive electrode (5) and the negative electrode (8) are provided with flanges I (6), and the flanges I (6) and the electrolytic cell body (1) are fixedly connected through bolts I (7).

6. The automatic control device for the flow of brine in an electrolytic cell according to claim 1, characterized in that: The feeding mechanism (2) comprises a feeding pipe (23), the upper end of the electrolytic cell body (1) is provided with the feeding pipe (23), the upper end side of the feeding pipe (23) is provided with a feeding hopper (21), and the upper end center position of the feeding pipe (23) is provided with a flow slowing assembly (22).

7. The automatic control device for the flow of brine in an electrolytic cell according to claim 6, characterized in that: The feeding mechanism (2) further comprises a mounting ring (24), the upper end side of the electrolytic cell body (1) is provided with the mounting ring (24), the lower end surface of the feeding pipe (23) is provided with a flange II (27), and the feeding pipe (23) and the flange II (27) are fixedly connected through bolts III (25).

8. The automatic control device for the flow of brine in an electrolytic cell according to claim 7, characterized in that: The feeding mechanism (2) further comprises a sealing ring II (26), the upper end edge of the mounting ring (24) is provided with the sealing ring II (26), and the lower end of the flange II (27) is provided with a sealing groove II (28) corresponding to the sealing ring II (26).

9. The automatic control device for the flow of brine in an electrolytic cell according to claim 6, characterized in that: The flow slowing assembly (22) comprises a driving assembly (221), the upper end of the feeding pipe (23) is provided with the driving assembly (221), the lower end of the driving assembly (221) is provided with a rotating shaft (223) in the feeding pipe (23), and the surface of the rotating shaft (223) is provided with helical blades (222).

10. The automatic control device for the flow of brine in an electrolytic cell according to claim 9, characterized in that: The drive assembly (221) includes a mounting box (2211), the upper end of the feed pipe (23) is mounted with the mounting box (2211), the side of the mounting box (2211) is mounted with a motor (2214), the output end of the motor (2214) is provided with a bevel gear one (2213), the side of the bevel gear one (2213) is mounted with a bevel gear two (2212), and the bevel gear two (2212) is mounted on the upper surface of the rotating shaft (223).

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