Sectional PH concentration control device for reaction tank

Abstract

The invention discloses a sectional PH concentration control device for a reaction tank, which comprises the reaction tank and a plurality of concentration control devices, the reaction tank is divided into a plurality of sections, each section is correspondingly connected with the concentration control device, and each section is divided into a front area, a middle area and a rear area; the concentration control device is composed of a first-stage concentration adjusting tank, a first-stage output pipeline, a second-stage concentration adjusting tank and a second-stage output pipeline which are sequentially connected in the feeding direction, three branch pipes are led out of the output end of the second-stage output pipeline in a bypass mode, and the branch pipes are connected with the front area, the middle area and the rear area respectively. The concentration control device is used for maintaining the dynamic balance of the concentration of the reaction liquid in the front area, the middle area and the rear area of the reaction tank, the primary concentration adjusting tank is used for adjusting the reaction liquid with the preset threshold concentration, and the secondary concentration adjusting tank is used for adjusting the reaction liquid with the corresponding concentration according to the condition that the concentration of the reaction liquid in the related area of the reaction tank deviates from the preset threshold. The method has the characteristics of sustainable and stable reaction and high finished product quality.

Description

Technical Field

[0001] The invention relates to the technical field of metal processing, in particular to a device for controlling pH concentration in a reaction pool in sections. Background Art

[0002] In existing anodizing processes, a continuous supply of reaction liquid is typically placed at the end of a reaction tank, allowing the workpiece to undergo an electrolytic reaction in sync with the flow of the reaction liquid along the reaction tank. However, due to the large size of some reaction tanks (some can extend for hundreds of meters), the reaction liquid in certain areas faces the opposite direction of the workpiece, resulting in a relatively low concentration of the reaction liquid in these areas. This prevents the workpiece from fully reacting and forming an oxide film on its surface, thus affecting the output quality of the workpiece. Therefore, based on the above technical problems, the present application proposes a device for controlling the pH concentration of a reaction pool in sections, which can continuously carry out reactions and produce high-quality finished products. Summary of the Invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a device for controlling pH concentration in a reaction pool in sections with stable reaction and good processing effect.

[0004] In order to achieve the above-mentioned purpose, the present invention provides a reaction pool segmented pH concentration control device, including a reaction pool and several concentration control devices, wherein the reaction pool is divided into several sections, each section is connected to the concentration control device, and each section is divided into a front zone, a middle zone and a rear zone; the concentration control device is composed of a first-level concentration adjustment tank, a first-level output pipe, a second-level concentration adjustment tank and a second-level output pipe connected in sequence along the feeding direction, the output end of the second-level output pipe is bypassed with three branches, and the branches are respectively connected to the front zone, the middle zone and the rear zone, the concentration control device is used to maintain the dynamic balance of the reaction liquid concentration in the front zone, the middle zone and the rear zone of the reaction pool, the first-level concentration adjustment tank is used to modulate the reaction liquid of a preset threshold concentration, and the second-level concentration adjustment tank is used to modulate the reaction liquid of the corresponding concentration according to the deviation of the reaction liquid concentration in the relevant area of the reaction pool from the preset threshold.

[0005] Furthermore, both the first-stage concentration tank and the second-stage concentration tank are provided with a stirring device for stirring the reaction liquid in the tank.

[0006] It further includes a plurality of primary concentration sensors, secondary concentration sensors and tertiary concentration sensors for detecting the concentration of the reaction liquid. The primary concentration sensor is arranged on the front area, the secondary concentration sensor is arranged on the middle area, and the tertiary concentration sensor is arranged on the rear area.

[0007] Furthermore, the capacity of the first-stage concentration tank is greater than that of the second-stage concentration tank.

[0008] Furthermore, a first-level feed pipe and a second-level feed pipe are provided on the top of the first-level concentration tank, wherein the first-level feed pipe is provided with a first-level control valve for controlling on and off, and the second-level feed pipe is provided with a second-level control valve for controlling on and off; the first-level feed pipe is used to transport the raw material for modulating the reaction liquid, and the second-level feed pipe is used to transport another raw material for modulating the reaction liquid.

[0009] Furthermore, a tertiary feed pipe and a quaternary feed pipe are provided on the top of the secondary concentration tank, wherein the tertiary feed pipe is provided with a tertiary control valve for controlling on and off, and the quaternary feed pipe is provided with a quaternary control valve for controlling on and off; the tertiary feed pipe is used to transport the raw material for modulating the reaction liquid, and the quaternary feed pipe is used to transport another raw material for modulating the reaction liquid.

[0010] Furthermore, the first-level output pipeline is provided with a first-level delivery valve for controlling on-off.

[0011] Furthermore, each branch pipe between the secondary output pipeline and the reaction tank is provided with a secondary delivery valve and a feed pump for controlling on-off in sequence.

[0012] Furthermore, a first-level liquid level sensor for detecting the liquid level is provided in the upper middle portion of the first-level concentration adjustment tank, and a fourth-level concentration sensor for detecting the concentration of the reaction liquid in the tube is provided at the bottom of the first-level concentration adjustment tank.

[0013] Furthermore, a secondary liquid level sensor for detecting the liquid level is provided in the upper middle portion of the secondary concentration tank, and a five-level concentration sensor for detecting the concentration of the reaction liquid in the tube is provided at the bottom of the secondary concentration tank.

[0014] The present invention adopts the above-mentioned solution, and its beneficial effects are: Different from the traditional method of transporting a large amount of reaction liquid at a fixed position, the reaction pool is divided into areas, and a concentration control device and related concentration sensors are set to monitor the concentration of the reaction liquid in the reaction pool in real time. When it is detected that the concentration of the reaction liquid in the corresponding area is higher or lower than the preset threshold and exceeds the preset time, the concentration control device is instructed to adjust the reaction liquid accordingly and transport the reaction liquid to the corresponding area through the corresponding branch pipe for concentration control, so that the concentration of the reaction liquid in the area returns to the preset threshold, thereby realizing the dynamic balance of the regional reaction liquid concentration, relatively reducing production costs, and achieving the function of segmented concentration control. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Schematic diagram of the structure of the device for controlling pH concentration in the reaction tank in sections in this embodiment.

[0016] Figure 2 for Figure 1 Schematic top view of the coordination between the secondary output pipeline and the branch pipe at A in the middle.

[0017] Among them, 1-reaction tank, 11-front zone, 111-first-level concentration sensor, 12-middle zone, 121-second-level concentration sensor, 13-back zone, 131-third-level concentration sensor, 2-concentration control device, 21-first-level feed pipe, 211-first-level control valve, 22-second-level feed pipe, 221-second-level control valve, 23-first-level concentration adjustment tank, 231-first-level liquid level sensor, 232-fourth-level concentration sensor, 24-first-level output pipeline, 241-first-level delivery valve, 25-second-level concentration adjustment tank, 251-second-level liquid level sensor, 252-fifth-level concentration sensor, 26-third-level feed pipe, 261-third-level control valve, 27-fourth-level feed pipe, 271-fourth-level control valve, 28-second-level output pipeline, 281-branch pipe, 282-second-level delivery valve, 283-feeding pump, 29-stirring device, 3-workpiece. DETAILED DESCRIPTION

[0018] To facilitate understanding of the present invention, the present invention is described more fully below with reference to the accompanying drawings. The accompanying drawings illustrate preferred embodiments of the present invention. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided solely to provide a more thorough and comprehensive understanding of the present disclosure.

[0019] See attached Figure 1As shown, in this embodiment, a reaction pool segmented pH concentration control device includes a reaction pool 1, a plurality of concentration control devices 2, and a plurality of primary concentration sensors 111, secondary concentration sensors 121 and tertiary concentration sensors 131 for detecting the concentration of the reaction liquid, wherein the reaction pool 1 is divided into a plurality of sections, each section is connected to a concentration control device 2, and each section is divided into a front area 11, a middle area 12 and a rear area 13; the primary concentration sensor 111 is arranged on the front area 11, the secondary concentration sensor 121 is arranged on the middle area 12, and the tertiary concentration sensor 131 is arranged on the rear area 13. It should be noted that due to the process requirements, the overall length of the reaction pool 1 is relatively large, and the traditional reaction liquid supply method cannot immediately control the concentration of a certain position in the reaction pool 1, and as the workpiece 3 consumes the reaction liquid, the uneven concentration of the reaction liquid in the reaction pool 1 increases synchronously, so that the workpiece 3 needs to be returned multiple times. Therefore, in this embodiment, the reaction pool 1 is divided into areas (the length of each area is divided according to actual production, preferably 10 meters here), and the concentration control device 2 is used to adjust the concentration of the area, so as to avoid the uneven concentration of the reaction liquid in the reaction pool 1 and reduce the rework rate of the workpiece 3; secondly, by arranging a number of concentration sensors on the corresponding areas, effective feedback on the concentration of the reaction liquid in each area of the reaction pool 1 can be achieved, and the concentration control device 2 is used to adjust the concentration of the corresponding area, which is more convenient for controlling the production process, thereby ensuring that the workpiece 3 flowing through the area can fully undergo electrolytic reaction, so that a complete oxide film can be formed on the surface of the workpiece 3 processed by the reaction pool 1; secondly, by setting a plurality of concentration sensors, the accuracy of the detection of the concentration of the regional reaction liquid is improved, and the reaction liquid is supplemented due to the concentration of some positions deviating from the preset threshold value, so as to ensure that the production cost is relatively reduced under the premise of realizing segmented concentration control of the reaction pool 1.

[0020] See attached Figure 1 、 2As shown, in this embodiment, the concentration control device 2 consists of a first-stage concentration adjustment tank 23, a first-stage output pipe 24, a second-stage concentration adjustment tank 25 and a second-stage output pipe 28 connected in sequence along the feeding direction. The output end of the second-stage output pipe 28 is bypassed to lead out three branch pipes 281, and the branch pipes 281 are respectively connected to the front zone 11, the middle zone 12 and the rear zone 13. The concentration control device 2 is used to maintain the dynamic balance of the concentration of the reaction liquid in the front zone 11, the middle zone 12 and the rear zone 13 of the reaction tank 1. The first-stage concentration adjustment tank 23 is used to modulate the reaction liquid of a preset threshold concentration. The second-stage concentration adjustment tank 25 is used to modulate the reaction liquid of the corresponding concentration according to the deviation of the reaction liquid concentration in the relevant area of the reaction tank 1 from the preset threshold. The capacity of the first-stage concentration adjustment tank 23 is greater than that of the second-stage concentration adjustment tank 25. Specifically, by bypassing the output end of the second-stage output pipe 28 to lead out three branch pipes 281 respectively connected to the front zone 11, the middle zone 12 and the rear zone 13, when the concentration of the reaction liquid in the front zone 11 / the middle zone 12 / the rear zone 13 is detected, the first-stage concentration adjustment tank 23 is used to modulate the concentration of the reaction liquid. When the concentration of the reaction liquid is higher or lower than a preset threshold and remains deviated from the preset threshold for a predetermined time, the secondary concentration adjustment tank 25 is used to adjust the reaction liquid of the corresponding concentration and deliver it to the region through the secondary output pipe 28 and the relevant branch pipe 281 for concentration adjustment, so that the concentration of the reaction liquid in the corresponding region returns to within the preset threshold, thereby maintaining the dynamic balance of the concentration in the region of the reaction tank 1. Secondly, by setting the capacity of the primary concentration adjustment tank 23 to be larger than that of the secondary concentration adjustment tank 25, the primary concentration adjustment tank 23 can output at least one, preferably two, full portions of the reaction liquid of the preset threshold concentration to the secondary concentration adjustment tank 25 after completing one adjustment of the reaction liquid of the preset threshold concentration (the specific capacity and capacity ratio of the primary concentration adjustment tank 23 and the secondary concentration adjustment tank 25 can be set according to actual production conditions), thereby reducing the time for supplying the reaction liquid of the corresponding concentration to the reaction tank 1, ensuring that the concentration of the reaction liquid in the reaction tank 1 can be continuously maintained within the dynamically stable preset threshold, thereby ensuring the integrity of the oxide film on the surface of the workpiece 3.

[0021] See attached Figure 1 As shown, further, both the first-stage concentration tank 23 and the second-stage concentration tank 25 are provided with a stirring device 29 for stirring the reaction liquid in the tank, so that the first-stage concentration tank 23 and the second-stage concentration tank 25 can fully stir and mix the reaction liquid when modulating the reaction liquid, thereby ensuring the concentration of the reaction liquid output by the first-stage concentration tank 23 and the second-stage concentration tank 25 accordingly.

[0022] See attached Figure 1As shown, further, a first-level feed pipe 21 and a second-level feed pipe 22 are provided on the top of the first-level concentration tank 23, wherein the first-level feed pipe 21 is provided with a first-level control valve 211 for controlling on and off, and the second-level feed pipe 22 is provided with a second-level control valve 221 for controlling on and off; the first-level feed pipe 21 is used to transport the raw material for the reaction liquid, and the second-level feed pipe 22 is used to transport another raw material for the reaction liquid. Secondly, a third-level feed pipe 26 and a fourth-level feed pipe 27 are provided on the top of the second-level concentration tank 25, wherein the third-level feed pipe 26 is provided with a third-level control valve 261 for controlling on and off The four-stage feed pipe 27 is provided with a four-stage control valve 271 for controlling the on-off; the three-stage feed pipe 26 is used to transport the raw material for modulating the reaction liquid, and the four-stage feed pipe 27 is used to transport another raw material for modulating the reaction liquid. By arranging relevant control valves on the above-mentioned feed pipes, it is ensured that the first-stage concentration tank 23 or the second-stage concentration tank 25 can independently modulate the reaction liquid, thereby avoiding the unfinished modulation of the reaction liquid from being transported to the second-stage concentration tank 25 or the reaction tank 1, thereby affecting the normal production operation; secondly, the raw materials for modulating the reaction liquid can be selected according to the actual production process, and no specific limitation is made here.

[0023] See attached Figure 1 As shown, in this embodiment, a primary delivery valve 241 for controlling on-off is provided on the primary output pipeline 24, and a secondary delivery valve 282 and a feed pump 283 for controlling on-off are provided in sequence on each branch pipe 281 between the secondary output pipeline 28 and the reaction tank 1. When it is detected that the concentration of the reaction liquid in any of the above-mentioned areas is higher or lower than the preset threshold within a preset time, after the secondary concentration adjustment tank 25 completes the modulation of the reaction liquid of the corresponding concentration, the secondary delivery valve 282 on the relevant branch is controlled to be on and off, so that the secondary concentration adjustment tank 25 adjusts the concentration of the reaction liquid in the above-mentioned relevant areas, thereby realizing segmented concentration control of the reaction tank 1.

[0024] See attached Figure 1 As shown, further, a first-level liquid level sensor 231 for detecting the liquid level is provided in the middle and upper part of the first-level concentration adjusting tank 23, a fourth-level concentration sensor 232 for detecting the concentration of the reaction liquid in the tube is provided at the bottom of the first-level concentration adjusting tank 23, a second-level liquid level sensor 251 for detecting the liquid level is provided in the middle and upper part of the second-level concentration adjusting tank 25, and a fifth-level concentration sensor 252 for detecting the concentration of the reaction liquid in the tube is provided at the bottom of the second-level concentration adjusting tank 25. By providing the above-mentioned liquid level sensors, it is avoided that the liquid level in the first-level concentration adjusting tank 23 or the second-level concentration adjusting tank 25 is too high, causing excessive load in the tank; secondly, by providing the fourth-level concentration sensor 232 and the fifth-level concentration sensor 252, after detecting that the concentration of the reaction liquid in the tank meets the requirements, the reaction liquid is output in conjunction with the relevant control valve, thereby ensuring the modulation quality of the reaction liquid.

[0025] The above-mentioned preset threshold value and the preset time of deviation from the preset threshold value can be set according to actual process and production conditions.

[0026] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any form. Any person skilled in the art who, without departing from the scope of the technical solution of the present invention, utilizes the technical content disclosed above to make more possible changes and modifications to the technical solution of the present invention, or modifications are all equivalent embodiments of the present invention. Therefore, any equivalent and equivalent changes made in accordance with the ideas of the present invention without departing from the content of the technical solution of the present invention should be included in the scope of protection of the present invention.

Claims

1. A device for controlling pH concentration in a reaction tank in sections, characterized in that: The invention comprises a reaction pool (1) and a plurality of concentration control devices (2), wherein the reaction pool (1) is divided into a plurality of sections, each section is connected to the concentration control device (2), and each section is divided into a front area (11), a middle area (12) and a rear area (13); the concentration control device (2) is composed of a first-stage concentration adjustment tank (23), a first-stage output pipe (24), a second-stage concentration adjustment tank (25) and a second-stage output pipe (28) connected in sequence along the feeding direction, and the output end of the second-stage output pipe (28) is bypassed and has three branches. The pipe (281) is connected to the front zone (11), the middle zone (12) and the rear zone (13), respectively. The concentration control device (2) is used to maintain the dynamic balance of the concentration of the reaction liquid in the front zone (11), the middle zone (12) and the rear zone (13) of the reaction tank (1). The first-level concentration adjustment tank (23) is used to modulate the reaction liquid of a preset threshold concentration. The second-level concentration adjustment tank (25) is used to modulate the reaction liquid of a corresponding concentration according to the deviation of the concentration of the reaction liquid in the relevant area of the reaction tank (1) from the preset threshold.

2. A reaction tank segmented pH concentration control device according to claim 1, characterized in that: The first-stage concentration adjustment tank (23) and the second-stage concentration adjustment tank (25) are both provided with a stirring device (29) for stirring the reaction liquid in the tank.

3. A reaction tank segmented pH concentration control device according to claim 1, characterized in that: The system further comprises a plurality of primary concentration sensors (111), a secondary concentration sensor (121) and a tertiary concentration sensor (131) for detecting the concentration of the reaction liquid, wherein the primary concentration sensor (111) is arranged on the front area (11), the secondary concentration sensor (121) is arranged on the middle area (12), and the tertiary concentration sensor (131) is arranged on the rear area (13).

4. A reaction tank segmented pH concentration control device according to claim 1, characterized in that: The capacity of the first-stage concentration adjustment tank (23) is greater than that of the second-stage concentration adjustment tank (25).

5. A reaction tank segmented pH concentration control device according to claim 1, characterized in that: A primary feed pipe (21) and a secondary feed pipe (22) are provided on the top of the primary concentration tank (23), wherein the primary feed pipe (21) is provided with a primary control valve (211) for controlling on and off, and the secondary feed pipe (22) is provided with a secondary control valve (221) for controlling on and off; the primary feed pipe (21) is used to transport a raw material for modulating the reaction liquid, and the secondary feed pipe (22) is used to transport another raw material for modulating the reaction liquid.

6. A device for controlling pH concentration in a reaction tank in sections according to claim 1, characterized in that: A tertiary feed pipe (26) and a quaternary feed pipe (27) are provided on the top of the secondary concentration tank (25), wherein the tertiary feed pipe (26) is provided with a tertiary control valve (261) for controlling on and off, and the quaternary feed pipe (27) is provided with a quaternary control valve (271) for controlling on and off; the tertiary feed pipe (26) is used to transport a raw material for modulating the reaction liquid, and the quaternary feed pipe (27) is used to transport another raw material for modulating the reaction liquid.

7. A device for controlling pH concentration in a reaction tank in sections according to claim 1, characterized in that: The primary output pipeline (24) is provided with a primary delivery valve (241) for controlling on and off.

8. A device for controlling pH concentration in a reaction tank in sections according to claim 1, characterized in that: Each branch pipe (281) between the secondary output pipe (28) and the reaction tank (1) is provided with a secondary delivery valve (282) and a feed pump (283) for controlling on and off.

9. A device for controlling pH concentration in a reaction tank in sections according to claim 1, characterized in that: A first-level liquid level sensor (231) for detecting the liquid level is provided at the middle upper portion of the first-level concentration adjustment tank (23), and a fourth-level concentration sensor (232) for detecting the concentration of the reaction liquid in the tube is provided at the lower portion of the first-level concentration adjustment tank (23).

10. The device for controlling pH concentration in two reaction tanks in stages according to claim 1, characterized in that: A secondary liquid level sensor (251) for detecting the liquid level is provided at the middle upper portion of the secondary concentration adjustment tank (25), and a five-level concentration sensor (252) for detecting the concentration of the reaction liquid in the tube is provided at the lower portion of the secondary concentration adjustment tank (25).

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