Chlorine treatment device and electro-deposition cobalt tail gas treatment system

Abstract

This utility model discloses a chlorine treatment device and an electrolytic cobalt tail gas treatment system, configured to connect a primary chlorine absorption tank, a secondary chlorine absorption tank, and a tail gas treatment mechanism. The interiors of the primary and secondary chlorine absorption tanks are respectively connected to the interior of the tail gas treatment mechanism. The chlorine treatment device includes a buffer tank and an adjustment component. The buffer tank is hollow and is respectively connected to the interiors of the primary chlorine absorption tank, the secondary chlorine absorption tank, and the tail gas treatment mechanism. The adjustment component includes a concentration detection unit and at least one adjustment element. The concentration detection unit is connected to the inner wall of the buffer tank and is used to detect the chlorine concentration in the buffer tank. At least one adjustment element is movably built into the buffer tank and is used to open or close the communication path between the buffer tank and the primary chlorine absorption tank and the tail gas treatment mechanism. This utility model can effectively solve the safety hazard caused by the high chlorine content in the gas entering the tail gas treatment mechanism.

Description

Technical Field

[0001] This utility model relates to the field of cobalt electrowinning technology, specifically to a chlorine gas treatment device and a cobalt electrowinning tail gas treatment system. Background Technology

[0002] To avoid the risk of explosion of hydrogen and chlorine gases produced by the decomposition of hydrochloric acid during the electrowinning process, which could pose a potential flash explosion hazard to industrial production, relevant research has emerged.

[0003] For example, Chinese utility model patent CN212610923U, entitled "An Electrolytic Cobalt Circulation System for Balancing Electrolyte Acidity," comprises an electrolytic unit, a tubular reactor, a gas-liquid separation unit, and a concentration adjustment unit connected sequentially through pipelines, forming a loop. This system connects the electrolytic circulation unit, tubular reactor, gas-liquid separation unit, and concentration adjustment unit sequentially to form a loop. The tubular reactor facilitates the synthesis of hydrochloric acid from most of the chlorine and hydrogen in the lean electrolyte after electrolysis by the electrolytic circulation unit, balancing the acidity of the lean electrolyte and reducing the need for hydrochloric acid replenishment, thus effectively lowering costs. Simultaneously, by using the tubular reactor to synthesize hydrochloric acid from some of the hydrogen and chlorine in the lean electrolyte, this invention reduces the variable amount of solution in the electrolyte circulation process and the release of hydrogen and chlorine, lowering the potential risk level and effectively improving the safety of industrial production.

[0004] However, in actual production, chlorine is not effectively absorbed after passing through the absorption tank, resulting in a high chlorine content in the gas entering the tail gas treatment unit, which poses a safety hazard. Utility Model Content

[0005] The purpose of this utility model is to overcome the above-mentioned technical deficiencies and propose a chlorine treatment device and an electrolytic cobalt tail gas treatment system to solve the technical problem that in the prior art, the chlorine content in the gas entering the tail gas treatment mechanism is high because the chlorine is not effectively absorbed after passing through the absorption tank, thus causing safety hazards.

[0006] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:

[0007] In a first aspect, this utility model provides a chlorine treatment device, configured to connect a primary chlorine absorption tank, a secondary chlorine absorption tank, and a tail gas treatment mechanism. The interiors of the primary and secondary chlorine absorption tanks are respectively connected to the interior of the tail gas treatment mechanism, including:

[0008] The buffer tank is hollow inside and is connected to the interiors of the primary chlorine absorption tank, the secondary chlorine absorption tank, and the exhaust gas treatment mechanism, respectively; and

[0009] The regulating component includes a concentration detection unit and at least one regulating element. The concentration detection unit is connected to the inner wall of the buffer tank and is used to detect the chlorine concentration in the buffer tank. The at least one regulating element is movably built into the buffer tank and is used to open or close the communication path between the buffer tank and the primary chlorine absorption tank and the tail gas treatment mechanism, respectively.

[0010] In some embodiments, the buffer tank has an air inlet, a first air outlet, and a second air outlet that are connected to its interior. The buffer tank is connected to the interior of the primary chlorine absorption tank through the air inlet, the buffer tank is connected to the interior of the secondary chlorine absorption tank through the first air outlet, and the buffer tank is connected to the interior of the exhaust gas treatment mechanism through the second air outlet.

[0011] In some embodiments, the adjusting member includes a first plug and a second plug. The first plug is disposed opposite to the first vent and is slidably inserted into the first vent to open or block the first vent. The second plug is disposed opposite to the second vent and is slidably inserted into the second vent to open or block the second vent.

[0012] In some embodiments, both the first plug and the second plug are elastic structures.

[0013] In some embodiments, both the first plug and the second plug have a large-diameter section and a small-diameter section. The large-diameter section of the first plug or the second plug is disposed away from the first vent or the second vent relative to the small-diameter section, and the small-diameter section of the first plug or the second plug can seal against the circumferential inner wall of the first vent or the second vent.

[0014] In some embodiments, the adjusting member further includes a first linear driving part and a second linear driving part. The fixed end of the first linear driving part is connected to the buffer groove and the telescopic end is connected to the first plug body, for driving the first plug body to slide along the axial direction of the first air outlet. The fixed end of the second linear driving part is connected to the buffer groove and the telescopic end is connected to the second plug body, for driving the second plug body to slide along the axial direction of the second air outlet.

[0015] In some embodiments, the adjusting member further includes a hinge seat and a hinge rod. The hinge seat is connected to the inner wall of the buffer groove, one end of the hinge rod is hinged to the hinge seat, the fixed end of the first linear drive unit is hinged to the inner wall of the buffer groove, and the telescopic end is hinged to the hinge rod. The fixed end of the second linear drive unit is hinged to the inner wall of the buffer groove, and the telescopic end is hinged to the hinge rod.

[0016] In some embodiments, the adjusting member further includes a connecting seat, which is hinged to the other end of the hinge rod and has a first segment and a second segment arranged perpendicularly to each other. The first segment is arranged opposite to the first vent and connected to the large diameter section of the first plug body, and the second segment is arranged opposite to the second vent and connected to the large diameter section of the second plug body.

[0017] In some embodiments, the concentration detection unit is a chlorine concentration sensor, which has a fixed end and a detection end. The fixed end of the chlorine concentration sensor is connected to the inner wall of the buffer tank, and the detection end is disposed at the second gas outlet. The chlorine concentration sensor is electrically connected to both the first linear drive unit and the second linear drive unit.

[0018] Secondly, this utility model also provides an electrolytic cobalt tail gas treatment system, including a primary chlorine absorption tank, a secondary chlorine absorption tank, a tail gas treatment mechanism, and a chlorine treatment device as described above. The interior of the buffer tank can be connected to the interior of the primary chlorine absorption tank, the interior of the secondary chlorine absorption tank, and the interior of the tail gas treatment mechanism, respectively.

[0019] Compared with the prior art, the beneficial effects of the chlorine treatment device and the cobalt electrowinning tail gas treatment system provided by this utility model include: the chlorine treatment device is configured to connect the primary chlorine absorption tank, the secondary chlorine absorption tank and the tail gas treatment mechanism. The chlorine treatment device includes a buffer tank, a concentration detection unit and at least one regulating component. The concentration detection unit is connected to the inner wall of the buffer tank and is used to detect the chlorine concentration in the buffer tank. The regulating component is movably built into the buffer tank and is used to open or close the communication path between the buffer tank and the primary chlorine absorption tank and the tail gas treatment mechanism respectively. Compared to existing technologies, this new technology uses a concentration detection unit to monitor the chlorine concentration in the buffer tank. If the chlorine concentration in the buffer tank exceeds a preset value, the buffer tank is connected to the secondary chlorine absorption tank but not to the exhaust gas treatment mechanism. This reduces the chlorine concentration in the exhaust gas discharged from the primary chlorine absorption tank. Conversely, if the chlorine concentration in the buffer tank is lower than the preset value, the buffer tank is not connected to the secondary chlorine absorption tank but is connected to the exhaust gas treatment mechanism. This new technology is not only simple in structure but also provides excellent chlorine absorption. It solves the technical problem in existing technologies where chlorine is not effectively absorbed after passing through the primary absorption tank, resulting in a high chlorine content in the gas entering the exhaust gas treatment mechanism, which poses a safety hazard. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a chlorine treatment device provided in one embodiment of the present invention;

[0021] Figure 2 This is a cross-sectional view of the connection between the buffer groove and the adjustment component provided in one embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram showing the electrical connection between the controller and the concentration detection unit, the first linear drive unit and the second linear drive unit provided in an embodiment of the present invention.

[0023] Explanation of reference numerals in the attached figures:

[0024] 100 for primary chlorine absorption tank; 200 for secondary chlorine absorption tank; 300 for tail gas treatment mechanism; 400 for buffer tank; 410 for air inlet; 420 for first air outlet; 430 for second air outlet; 500 for regulating component; 510 for concentration detection unit; 520 for regulating component; 521 for first plug; 522 for second plug; 523 for first linear drive unit; 524 for second linear drive unit; 525 for hinge seat; 526 for hinge rod; 527 for connecting seat; 600 for controller. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0026] To address the technical problem in existing technologies where chlorine gas is not effectively absorbed after passing through the primary absorption tank, resulting in a high chlorine content in the gas entering the tail gas treatment mechanism 300 and thus posing a safety hazard, this utility model provides a chlorine gas treatment device and an electrolytic cobalt tail gas treatment system. This system enables the detection of chlorine concentration in the buffer tank 400 via a concentration detection unit 510. If the chlorine concentration in the buffer tank 400 exceeds a preset value, the buffer tank 400 is connected to the secondary chlorine absorption tank 200 but not to the tail gas treatment mechanism 300, thereby reducing the chlorine concentration in the tail gas discharged from the primary chlorine absorption tank 100. Conversely, if the chlorine concentration in the buffer tank 400 is lower than the preset value, the buffer tank 400 is not connected to the secondary chlorine absorption tank 200 but is connected to the tail gas treatment mechanism 300. This design is not only simple in structure but also provides excellent chlorine absorption.

[0027] Please see Figure 1 , Figure 2 , Figure 1 , Figure 2This is a schematic diagram of the structure of a chlorine treatment device and an electrolytic cobalt tail gas treatment system in one embodiment of the present invention. The chlorine treatment device is configured to connect a primary chlorine absorption tank 100, a secondary chlorine absorption tank 200, and a tail gas treatment mechanism 300. The interiors of the primary chlorine absorption tank 100 and the secondary chlorine absorption tank 200 are respectively connected to the interior of the tail gas treatment mechanism 300. The chlorine treatment device includes a buffer tank 400 and an adjustment component 500. The buffer tank 400 is hollow and its interior can be connected to the interiors of the primary chlorine absorption tank 100, the secondary chlorine absorption tank 200, and the tail gas treatment mechanism 300. The adjustment component 500 includes a concentration detection unit 510 and at least one adjustment element 520. The concentration detection unit 510 is connected to the inner wall of the buffer tank 400 and is used to detect the chlorine concentration in the buffer tank 400. At least one adjustment element 520 is movably built into the buffer tank 400 and is used to open or close the communication path between the buffer tank and the primary chlorine absorption tank and the tail gas treatment mechanism, respectively.

[0028] In this device, compared to existing technologies, a concentration detection unit 510 is set up to detect the chlorine concentration in the buffer tank 400. If the chlorine concentration in the buffer tank 400 exceeds a preset value, the buffer tank 400 is connected to the secondary chlorine absorption tank 200 and cannot be connected to the tail gas treatment mechanism 300, thereby reducing the chlorine concentration in the tail gas discharged from the primary chlorine absorption tank 100. If the chlorine concentration in the buffer tank 400 is lower than the preset value, the buffer tank 400 cannot be connected to the secondary chlorine absorption tank 200 and is connected to the tail gas treatment mechanism 300. This device not only has a simple structure but also has a good chlorine absorption effect. It can solve the technical problem in existing technologies where the chlorine content in the gas entering the tail gas treatment mechanism 300 is high due to the chlorine not being effectively absorbed after passing through the absorption tank once, thus causing safety hazards.

[0029] Furthermore, the chlorine primary absorption tank 100, chlorine secondary absorption tank 200, and tail gas treatment mechanism 300 in this device are conventional configurations known to those skilled in the art. The chlorine primary absorption tank 100 and chlorine secondary absorption tank 200 are provided with alkaline solutions, such as sodium hydroxide (NaOH) solution or lime milk (Ca(OH)2 suspension), which will not be described in detail here.

[0030] In one embodiment, please refer to Figure 2 The buffer tank 400 is provided with an air inlet 410, a first air outlet 420 and a second air outlet 430 that are connected to its interior. The buffer tank 400 is connected to the interior of the primary chlorine absorption tank 100 through the air inlet 410, the buffer tank 400 is connected to the interior of the secondary chlorine absorption tank 200 through the first air outlet 420, and the buffer tank 400 is connected to the interior of the exhaust gas treatment mechanism 300 through the second air outlet 430.

[0031] By providing an air inlet 410, a first air outlet 420, and a second air outlet 430, the buffer tank 400 is connected to the primary chlorine absorption tank 100, the secondary chlorine absorption tank 200, and the exhaust gas treatment mechanism 300, respectively, so that the gas entering the buffer tank 400 can be integrated into the exhaust gas treatment mechanism 300.

[0032] Furthermore, the buffer tank 400 is connected to the primary chlorine absorption tank 100, the secondary chlorine absorption tank 200, and the tail gas treatment unit 300 through pipelines, and the pipelines are sealed and corrosion-resistant, which will not be elaborated further here.

[0033] In this embodiment, as Figure 2 As shown, the adjusting member 520 includes a first plug 521 and a second plug 522. The first plug 521 is disposed relative to the first vent 420 and can be slidably inserted into the first vent 420 for opening or blocking the first vent 420. The second plug 522 is disposed relative to the second vent 430 and can be slidably inserted into the second vent 430 for opening or blocking the second vent 430.

[0034] The first plug 521 and the second plug 522 can slide relative to the first vent 420 or the second vent 430 respectively, so that the first plug 521 and the second plug 522 can slide into the first vent 420 or the second vent 430 respectively to block the first vent 420 or the second vent 430.

[0035] Furthermore, when the first plug 521 slides into the first vent 420, the gas cannot enter the secondary chlorine absorption tank 200 from the primary chlorine absorption tank 100, but can only enter the tail gas treatment mechanism 300. This proves that the concentration of chlorine in the primary chlorine absorption tank 100 is not excessive. When the second plug 522 slides into the second vent 430, the gas cannot enter the tail gas treatment mechanism 300 from the primary chlorine absorption tank 100, but can only enter the secondary chlorine absorption tank 200 and then the tail gas treatment mechanism 300. This proves that the concentration of chlorine in the primary chlorine absorption tank 100 is excessive.

[0036] In one embodiment, both the first plug 521 and the second plug 522 are elastic structures.

[0037] Both the first plug 521 and the second plug 522 are elastic structures, which can increase the sealing between the first plug 521 and the second plug 522 and the circumferential inner wall of the first vent 420 or the second vent 430, respectively, thereby improving safety and stability.

[0038] Furthermore, the first plug 521 and the second plug 522 are made of rubber or plastic, which are common and readily available in the market, and will not be described in detail here.

[0039] In one embodiment, such as Figure 2 As shown, both the first plug 521 and the second plug 522 have a large diameter section and a small diameter section. The large diameter section of the first plug 521 or the second plug 522 is disposed away from the first air outlet 420 or the second air outlet 430 relative to the small diameter section, and the small diameter section of the first plug 521 or the second plug 522 can seal against the circumferential inner wall of the first air outlet 420 or the second air outlet 430.

[0040] The first plug 521 and the second plug 522 have a stepped structure, which can enhance the sealing between the first plug 521 and the second plug 522 and the circumferential inner wall of the first vent 420 or the second vent 430, respectively, and improve safety and stability.

[0041] Furthermore, the cross-sectional area of ​​the small-diameter section of the first plug 521 and the second plug 522 gradually decreases along the direction close to the first air outlet 420 or the second air outlet 430, and is arc-shaped, which can improve the accuracy of the first plug 521 and the second plug 522 being inserted into the first air outlet 420 or the second air outlet 430.

[0042] In one embodiment, such as Figure 2 As shown, the adjusting member 520 also includes a first linear drive part 523 and a second linear drive part 524. The fixed end of the first linear drive part 523 is connected to the buffer groove 400 and the telescopic end is connected to the first plug body 521, which is used to drive the first plug body 521 to slide along the axial direction of the first air outlet 420. The fixed end of the second linear drive part 524 is connected to the buffer groove 400 and the telescopic end is connected to the second plug body 522, which is used to drive the second plug body 522 to slide along the axial direction of the second air outlet 430.

[0043] Driven by the first linear drive unit 523 and the second linear drive unit 524, the first plug body 521 and the second plug body 522 can slide and respectively open or block the first air outlet 420 or the second air outlet 430.

[0044] Furthermore, the first linear drive unit 523 and the second linear drive unit 524 here are commonly available and readily procurable push rod motors, hydraulic cylinders and pneumatic cylinders. These push rod motors, hydraulic cylinders and pneumatic cylinders are conventional configurations known to those skilled in the art, and will not be described in detail here.

[0045] In one embodiment, such as Figure 2As shown, the adjusting member 520 also includes a hinge seat 525 and a hinge rod 526. The hinge seat 525 is connected to the inner wall of the buffer groove 400. One end of the hinge rod 526 is hinged to the hinge seat 525. The fixed end of the first linear drive unit 523 is hinged to the inner wall of the buffer groove 400, and the telescopic end is hinged to the hinge rod 526. The fixed end of the second linear drive unit 524 is hinged to the inner wall of the buffer groove 400, and the telescopic end is hinged to the hinge rod 526.

[0046] The hinge rod 526 can form a hinge structure with the first linear drive unit 523 or the second linear drive unit 524 respectively, so that under the drive of the first linear drive unit 523 or the second linear drive unit 524, the first plug 521 or the second plug 522 connected to the hinge rod 526 can rotate with the hinge rod 526 relative to the hinge seat 525, and after rotation, the first plug 521 or the second plug 522 can be inserted into the first air outlet 420 or the second air outlet 430 respectively.

[0047] Furthermore, the hinge rod 526 is inclined relative to the axis of the first air outlet 420 or the second air outlet 430, and the hinge rod 526 is located on the center line of the angle formed by the axis of the first air outlet 420 and the axis of the second air outlet 430, which can improve the stability of the device during operation.

[0048] In one embodiment, such as Figure 2 As shown, the adjusting member 520 also includes a connecting seat 527, which is hinged to the other end of the hinge rod 526 and has a first segment and a second segment arranged perpendicularly to each other. The first segment is arranged opposite to the first air outlet 420 and connected to the large diameter section of the first plug body 521, and the second segment is arranged opposite to the second air outlet 430 and connected to the large diameter section of the second plug body 522.

[0049] The L-shaped connecting seat 527 is used to connect the hinge rod 526 to the first plug 521 or the second plug 522 respectively, forming a parallelogram-like structure. This allows the first plug 521 to face the first vent 420 and be inserted into the first vent 420 after rotating with the hinge rod 526. At the same time, it also allows the second plug 522 to face the second vent 430 and be inserted into the second vent 430 after rotating with the hinge rod 526, thereby improving the stability of the device during operation.

[0050] In this embodiment, as Figure 2 As shown, the concentration detection unit 510 is a chlorine concentration sensor. The chlorine concentration sensor has a fixed end and a detection end. The fixed end of the chlorine concentration sensor is connected to the inner wall of the buffer tank 400, and the detection end is set in the second gas outlet 430. The chlorine concentration sensor is electrically connected to the first linear drive unit 523 and the second linear drive unit 524.

[0051] By electrically connecting the chlorine concentration sensor to the first linear drive unit 523 and the second linear drive unit 524, the device can automatically control the first linear drive unit 523 and the second linear drive unit 524 based on the chlorine concentration detected by the chlorine concentration sensor in the buffer tank 400.

[0052] Furthermore, such as Figure 3 As shown, this device also includes a controller 600, which is a common PLC controller on the market. The PLC controller has a memory, actuator, receiving module and transmitting module, and can realize the automatic control of the first linear drive unit 523 and the second linear drive unit 524. It will not be described in detail here.

[0053] In this embodiment, a cobalt electrowinning tail gas treatment system is also provided, including a primary chlorine absorption tank 100, a secondary chlorine absorption tank 200, a tail gas treatment mechanism 300, and the chlorine treatment device described above. The interior of the buffer tank 400 can be connected to the interior of the primary chlorine absorption tank 100, the interior of the secondary chlorine absorption tank 200, and the interior of the tail gas treatment mechanism 300, respectively.

[0054] The cobalt electrowinning tail gas treatment system also includes an electrolyte concentration adjustment tank, an electrolyte circulation tank, a closed electrolytic cell, a tubular reactor, a first gas-liquid separation tank, and a second gas-liquid separation tank. The electrolyte concentration adjustment tank, electrolyte circulation tank, closed electrolytic cell, tubular reactor, first gas-liquid separation tank, and second gas-liquid separation tank are sequentially connected in a loop. The inlet end of the chlorine primary absorption tank 100 is connected to the outlet end of the first gas-liquid separation tank. The inlet end of the chlorine secondary absorption tank 200 is connected to the outlet end of the second gas-liquid separation tank, the electrolyte concentration adjustment tank, and the electrolyte circulation tank, respectively, for absorbing the chlorine gas generated during the cobalt electrowinning production process. For reference, please refer to Chinese utility model patent with publication number CN212610923U, entitled "A Cobalt Electrowinning Circulation System Capable of Balancing Electrolyte Acidity Value". Further details are omitted here.

[0055] To better understand this utility model, the following is combined with... Figures 1 to 3 The technical solution of this utility model is described in detail below:

[0056] The chlorine treatment device is configured to connect the primary chlorine absorption tank 100, the secondary chlorine absorption tank 200, and the tail gas treatment mechanism 300. The chlorine treatment device includes a buffer tank 400, a concentration detection unit 510, and at least one regulating component 520. The concentration detection unit 510 is connected to the inner wall of the buffer tank 400 and is used to detect the chlorine concentration in the buffer tank 400. The regulating component 520 is movably built into the buffer tank 400 and is used to open or close the connection path between the buffer tank and the primary chlorine absorption tank and the tail gas treatment mechanism, respectively. Compared to existing technologies, by setting a concentration detection unit 510 to detect the chlorine concentration in the buffer tank 400, if the chlorine concentration in the buffer tank 400 exceeds the preset value, the buffer tank 400 is connected to the secondary chlorine absorption tank 200 and cannot be connected to the tail gas treatment mechanism 300, thereby reducing the chlorine concentration in the tail gas discharged from the primary chlorine absorption tank 100. If the chlorine concentration in the buffer tank 400 is lower than the preset value, the buffer tank 400 cannot be connected to the secondary chlorine absorption tank 200 and is connected to the tail gas treatment mechanism 300. This not only has a simple structure but also a good chlorine absorption effect.

[0057] In the specific working process of this utility model, during use, the inlet end of the primary chlorine absorption tank 100 is connected to the outlet end of the first gas-liquid separation tank, and the inlet end of the secondary chlorine absorption tank 200 is connected to the outlet end of the second gas-liquid separation tank, the electrolyte concentration adjustment tank, and the electrolyte circulation tank, respectively, to absorb chlorine generated during the cobalt electrowinning process. The tail gas after being treated by the primary chlorine absorption tank 100 and the secondary chlorine absorption tank 200 enters the tail gas treatment mechanism 300 for treatment to meet environmental protection requirements.

[0058] Furthermore, when the concentration detection unit 510 detects that the concentration of chlorine in the buffer tank 400 is not excessive, the first linear drive unit 523 drives the first plug 521, keeping the first plug 521 sliding into the first vent 420. The gas cannot enter the secondary chlorine absorption tank 200 from the primary chlorine absorption tank 100, but can only enter the tail gas treatment mechanism 300. When the concentration detection unit 510 detects that the concentration of chlorine in the buffer tank 400 has exceeded the standard, the second linear drive unit 524 drives the second plug 522, so that when the second plug 522 slides into the second vent 430, the gas cannot enter the tail gas treatment mechanism 300 from the primary chlorine absorption tank 100, but can only enter the secondary chlorine absorption tank 200 and then the tail gas treatment mechanism 300, forming secondary filtration to achieve the set chlorine concentration requirement.

[0059] This device, through the aforementioned structure and system, can solve the technical problem in the prior art where the chlorine content in the gas entering the tail gas treatment unit 300 is high due to the chlorine not being effectively absorbed after passing through the absorption tank, thus posing a safety hazard.

[0060] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A chlorine treatment device, configured to connect a primary chlorine absorption tank, a secondary chlorine absorption tank, and a tail gas treatment mechanism, wherein the interiors of the primary and secondary chlorine absorption tanks are respectively connected to the interior of the tail gas treatment mechanism, characterized in that... include: The buffer tank is hollow inside and is connected to the interior of the primary chlorine absorption tank, the secondary chlorine absorption tank, and the exhaust gas treatment mechanism, respectively. as well as The regulating component includes a concentration detection unit and at least one regulating element. The concentration detection unit is connected to the inner wall of the buffer tank and is used to detect the chlorine concentration in the buffer tank. The at least one regulating element is movably built into the buffer tank and is used to open or close the communication path between the buffer tank and the primary chlorine absorption tank and the tail gas treatment mechanism, respectively.

2. The chlorine treatment device according to claim 1, characterized in that, The buffer tank has an air inlet, a first air outlet, and a second air outlet that are connected to its interior. The buffer tank is connected to the interior of the primary chlorine absorption tank through the air inlet, the buffer tank is connected to the interior of the secondary chlorine absorption tank through the first air outlet, and the buffer tank is connected to the interior of the exhaust gas treatment mechanism through the second air outlet.

3. The chlorine treatment device according to claim 2, characterized in that, The adjusting component includes a first plug and a second plug. The first plug is disposed opposite to the first vent and can be slidably inserted into the first vent to open or block the first vent. The second plug is disposed opposite to the second vent and can be slidably inserted into the second vent to open or block the second vent.

4. The chlorine treatment device according to claim 3, characterized in that, Both the first plug and the second plug are elastic structures.

5. The chlorine treatment device according to claim 3, characterized in that, Both the first plug and the second plug have a large diameter section and a small diameter section. The large diameter section of the first plug or the second plug is located away from the first vent or the second vent relative to the small diameter section, and the small diameter section of the first plug or the second plug can seal against the circumferential inner wall of the first vent or the second vent.

6. The chlorine treatment apparatus according to claim 3, characterized in that, The adjusting component further includes a first linear drive unit and a second linear drive unit. The fixed end of the first linear drive unit is connected to the buffer groove, and the telescopic end is connected to the first plug body, for driving the first plug body to slide along the axial direction of the first air outlet. The fixed end of the second linear drive unit is connected to the buffer groove, and the telescopic end is connected to the second plug body, for driving the second plug body to slide along the axial direction of the second air outlet.

7. The chlorine treatment apparatus according to claim 6, characterized in that, The adjusting component further includes a hinge seat and a hinge rod. The hinge seat is connected to the inner wall of the buffer groove. One end of the hinge rod is hinged to the hinge seat. The fixed end of the first linear drive unit is hinged to the inner wall of the buffer groove, and the telescopic end is hinged to the hinge rod. The fixed end of the second linear drive unit is hinged to the inner wall of the buffer groove, and the telescopic end is hinged to the hinge rod.

8. The chlorine treatment apparatus according to claim 7, characterized in that, The adjusting component further includes a connecting seat, which is hinged to the other end of the hinge rod and has a first segment and a second segment arranged perpendicularly to each other. The first segment is arranged opposite to the first air outlet and connected to the large diameter section of the first plug body, and the second segment is arranged opposite to the second air outlet and connected to the large diameter section of the second plug body.

9. The chlorine treatment apparatus according to claim 6, characterized in that, The concentration detection unit is a chlorine concentration sensor. The chlorine concentration sensor has a fixed end and a detection end. The fixed end of the chlorine concentration sensor is connected to the inner wall of the buffer tank, and the detection end is set at the second gas outlet. The chlorine concentration sensor is electrically connected to both the first linear drive unit and the second linear drive unit.

10. A cobalt electrowinning tail gas treatment system, characterized in that, It includes a primary chlorine absorption tank, a secondary chlorine absorption tank, a tail gas treatment mechanism, and a chlorine treatment device as described in any one of claims 1-9, wherein the interior of the buffer tank can be connected to the interior of the primary chlorine absorption tank, the interior of the secondary chlorine absorption tank, and the interior of the tail gas treatment mechanism, respectively.

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