An automated elution apparatus for ion exchange resins

Abstract

The utility model provides a kind of ion exchange resin automation elution equipment, it is characterized in that, the utility model relates to a kind of ion exchange resin automation elution equipment, including control module and elution execution module.The control module is constituted by PLC controller and the on-line automatic monitoring instrument connected with its signal;The elution execution module includes eluent barrel, automatic dosing device, agitator, eluent transfer pump and elution process running pump.The utility model is through the closed-loop linkage control of on-line monitoring instrument and automatic dosing system, realizes the real-time feedback regulation of eluent key performance parameter, to build the dynamic balance system of eluent consumption and target ion enrichment efficiency.

Description

Technical Field

[0001] This utility model relates to an automated elution device, and more specifically, to an automated elution device for ion exchange resin. Background Technology

[0002] Ion exchange, as a highly efficient wastewater treatment technology, relies on the selective exchange of target ions between functional groups in the resin and the wastewater. In recent years, with the reduction in production costs and improvement in antioxidant properties of ion exchange resins, this technology has been widely applied in the deep treatment of electroplating wastewater and the recovery of heavy metal resources. The complete operating cycle of ion exchange resins encompasses three key stages: adsorption, elution, and regeneration. The elution stage plays a direct and decisive role in the system's operating efficiency and economy—once the resin reaches saturation, a high-affinity eluent solution is needed to displace the target ions, allowing the resin to regain its adsorption capacity. However, the currently prevalent single-batch elution method in the industry suffers from three technical drawbacks: firstly, to ensure thorough elution, excessive amounts of high-concentration eluent are often required, keeping reagent costs consistently high; secondly, large volumes of eluent significantly reduce the concentration of target ions, failing to meet the concentration threshold requirements for resource recovery; and thirdly, low-concentration eluent requires additional deep treatment such as evaporation and concentration, which undoubtedly increases energy consumption and costs in the resource recovery process significantly.

[0003] To address this challenge, there is an urgent need to develop a technical device capable of optimizing the elution process in real time and simultaneously improving eluent utilization efficiency and target product concentration. Based on this, we have invented an automated elution device for ion exchange resins. This device achieves real-time feedback adjustment of key performance parameters of the eluent through closed-loop linkage control of an online monitoring instrument and an automatic dosing system, thereby constructing a dynamic balance system between eluent consumption and target ion enrichment efficiency. This technology employs a threshold-triggered dosing module and a multi-parameter ion concentration synchronous tracking mechanism, supporting precise on-demand replenishment of active ingredients in the eluent and adaptively matching the concentration control requirements of different metal recovery scenarios. In summary, this device effectively solves the resource recovery obstacles caused by excessive reagent dosage and concentration loss in traditional elution processes, providing a low-reagent-consumption, high-target-product-concentration, and non-reactive elution technology solution for heavy metal recovery from electroplating wastewater. Summary of the Invention

[0004] To solve the above-mentioned technical problems, this utility model provides an automated elution device for ion exchange resin, which adopts the following technical solution:

[0005] Control module and elution execution module;

[0006] The control module includes a PLC controller and an online automatic monitoring instrument connected to the PLC controller signals;

[0007] The elution execution module includes:

[0008] Eluent container, used to hold eluent;

[0009] An automatic dosing device is connected to the eluent tank;

[0010] A stirrer is located inside the eluent tank;

[0011] The eluent transfer pump has its input end connected to the eluent tank and its output end connected to the eluent storage tank.

[0012] The elution process operates a pump to drive the eluent to circulate between the ion exchange column and the eluent tank.

[0013] Furthermore, the online automatic monitoring instrument detects the concentration of target ions in the eluent tank in real time; the PLC controller sends control commands to the automatic dosing device, stirrer, and eluent transfer pump based on the preset concentration threshold and the feedback signal from the online automatic monitoring instrument.

[0014] Furthermore, the PLC controller is configured to: when the eluent tank is empty, trigger a primary eluent configuration command to control the automatic dosing device to quantitatively add a preset amount of reagent and start the stirrer to dissolve the reagent; when the concentration of the target ion in the eluent is detected to be lower than a preset threshold, trigger a reagent replenishment command to control the automatic dosing device to quantitatively replenish the reagent and start the stirrer; when the concentration of the target ion is detected to reach a preset threshold, trigger a transfer storage command to start the eluent transfer pump to pump the eluent into the storage tank.

[0015] Furthermore, after the eluent transfer is completed, the eluent tank returns to an empty state, and the PLC controller automatically resets to the state of waiting for the primary eluent configuration command.

[0016] Furthermore, the online automatic monitoring instrument is a multi-parameter ion monitoring instrument; the multi-parameter ion monitoring instrument is configured to detect a variety of different target ions and allows setting corresponding target ion parameters and their concentration thresholds according to the composition of the current eluent, thereby enabling the elution equipment to be suitable for online continuous monitoring of ion exchange resin eluents with a variety of different compositions.

[0017] Compared with existing technologies, the advantages of this utility model are:

[0018] (1) This invention can achieve high concentration enrichment of target ions in the eluent;

[0019] (2) This utility model improves the efficiency of eluent use through automatic monitoring and reagent dosing system, with the eluent reagent utilization efficiency reaching up to 90%;

[0020] (3) This utility model uses an automatic control system to add chemicals, which greatly avoids the waste of eluent agents;

[0021] (4) This utility model controls the washing and dehydration process through an automatic control system, which greatly avoids the errors and safety hazards that exist in manual operation;

[0022] (5) The high-concentration eluent generated by this invention can be directly applied to the subsequent resource recovery process, which avoids secondary treatment and directly generates resource recovery benefits, thus having good economic value.

[0023] (6) This utility model has significant advantages in treating electroplating wastewater, such as stable process, low treatment cost and high reuse efficiency, providing strong technical support for the green development of the electroplating industry. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of this utility model;

[0025] The components are: 1-Ion exchange column, 2-PLC controller, 3-Online automatic monitoring instrument, 4-Eluent tank, 5-Automatic dosing device, 6-Running pump, 7-Agitator, 8-Eluent transfer pump, and 9-Storage tank. Detailed Implementation

[0026] The present invention will be further described and illustrated below with reference to the accompanying drawings and specific embodiments.

[0027] As shown in the figure, this utility model provides an automated elution device for ion exchange resin, characterized in that it includes:

[0028] Control module and elution execution module;

[0029] The control module includes a PLC controller 2 and an online automatic monitoring instrument 3 connected to the PLC controller 2 via signals;

[0030] The elution execution module includes:

[0031] Eluent container 4, used to hold eluent;

[0032] Automatic dosing device 5 is connected to eluent tank 4;

[0033] A stirrer 7 is located inside the eluent tank 4;

[0034] The eluent transfer pump 8 has its input end connected to the eluent tank 4 and its output end connected to the eluent storage tank 9.

[0035] The elution process operates pump 6, which drives the eluent to circulate between ion exchange column 1 and eluent tank 4.

[0036] The online automatic monitoring instrument 3 detects the target ion concentration in the eluent tank 4 in real time; the PLC controller 2 sends control commands to the automatic dosing device 5, the stirrer 7 and the eluent transfer pump 8 according to the preset concentration threshold and the feedback signal from the online automatic monitoring instrument 3.

[0037] The PLC controller 2 is configured to: when the eluent tank 4 is empty, trigger the primary eluent configuration command, control the automatic dosing device 5 to quantitatively add a preset amount of reagent, and start the stirrer 7 to dissolve the reagent; when the concentration of the target ion in the eluent is detected to be lower than a preset threshold, trigger the reagent replenishment command, control the automatic dosing device 5 to quantitatively replenish the reagent, and start the stirrer 7; when the concentration of the target ion is detected to reach a preset threshold, trigger the transfer storage command, and start the eluent transfer pump 8 to pump the eluent into the storage tank 9.

[0038] After the eluent transfer is completed, the eluent tank 4 returns to an empty state, and the PLC controller 2 automatically resets to the state of waiting for the primary eluent configuration instruction.

[0039] The online automatic monitoring instrument 3 is a multi-parameter ion monitoring instrument; the multi-parameter ion monitoring instrument is configured to detect a variety of different target ions and allows setting corresponding target ion parameters and their concentration thresholds according to the composition of the current eluent, thereby enabling the elution equipment to be suitable for online continuous monitoring of ion exchange resin eluents with a variety of different compositions.

[0040] The system's processing flow is as follows:

[0041] The operation of this automated ion exchange resin elution equipment is completed collaboratively by a control module (PLC controller 2 and online automatic monitoring instrument 3) and an elution execution module (elution tank 4, automatic dosing device 5, running pump 6, agitator 7, eluent transfer pump 8, and storage tank 9). The online automatic monitoring instrument 3 monitors the target ion concentration in the eluent tank 4 in real time and transmits the data to the PLC controller 2. The PLC controller 2 makes a judgment based on the preset target ion concentration threshold: when the eluent tank 4 is empty, it triggers the primary eluent preparation command and controls the automatic dosing device. 5. A preset amount of reagent is added quantitatively and the stirrer 7 is started to dissolve it. During the elution process, the pump 6 drives the eluent circulation to elute the ion exchange column 1. If the detected concentration is lower than the threshold, a reagent replenishment command is triggered, controlling the automatic dosing device 5 to quantitatively replenish the reagent and start the stirrer 7. If the detected concentration reaches or exceeds the threshold, a transfer and storage command is triggered, starting the eluent transfer pump 8 to pump the eluent into the storage tank 9 to achieve high concentration enrichment. After the transfer is completed, the eluent tank 4 is returned to empty, and the PLC controller 2 automatically resets to the waiting state for primary eluent preparation, forming a closed-loop automated cycle. Among them, the online automatic monitoring instrument 3, as a multi-parameter ion monitoring instrument, can flexibly set different target ions and their thresholds, making the equipment suitable for online continuous monitoring and control of various resin eluents.

[0042] This invention achieves real-time feedback adjustment of key performance parameters of the eluent through closed-loop linkage control of an online monitoring instrument and an automatic dosing system, thereby constructing a dynamic balance system between eluent consumption and target ion enrichment efficiency. The technology employs a threshold-triggered dosing module and a multi-parameter ion concentration synchronous tracking mechanism, supporting precise on-demand replenishment of active ingredients in the eluent and adaptively matching the concentration control requirements of different metal recovery scenarios. Example

[0043] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments.

[0044] An automated elution device for ion exchange resin was developed using the above technical solution, such as... Figure 1 .

[0045] The system includes an ion exchange column 1, a PLC controller 2, an online automatic monitor 3, an eluent tank 4, an automatic dosing device 5, a running pump 6, a stirrer 7, an eluent transfer pump 8, and a storage tank 9.

[0046] The device includes:

[0047] Control module and elution execution module;

[0048] The control module includes a PLC controller 2 and an online automatic monitoring instrument 3 connected to the PLC controller 2 via signals;

[0049] The elution execution module includes:

[0050] Eluent container 4, used to hold eluent;

[0051] Automatic dosing device 5 is connected to eluent tank 4;

[0052] A stirrer 7 is located inside the eluent tank 4;

[0053] The eluent transfer pump 8 has its input end connected to the eluent tank 4 and its output end connected to the eluent storage tank 9.

[0054] The elution process operates pump 6, which drives the eluent to circulate between ion exchange column 1 and eluent tank 4.

[0055] The online automatic monitoring instrument 3 detects the target ion concentration in the eluent tank 4 in real time; the PLC controller 2 sends control commands to the automatic dosing device 5, the stirrer 7 and the eluent transfer pump 8 according to the preset concentration threshold and the feedback signal from the online automatic monitoring instrument 3.

[0056] The PLC controller 2 is configured to: when the eluent tank 4 is empty, trigger the primary eluent configuration command, control the automatic dosing device 5 to quantitatively add a preset amount of reagent, and start the stirrer 7 to dissolve the reagent; when the concentration of the target ion in the eluent is detected to be lower than a preset threshold, trigger the reagent replenishment command, control the automatic dosing device 5 to quantitatively replenish the reagent, and start the stirrer 7; when the concentration of the target ion is detected to reach a preset threshold, trigger the transfer storage command, and start the eluent transfer pump 8 to pump the eluent into the storage tank 9.

[0057] After the eluent transfer is completed, the eluent tank 4 returns to an empty state, and the PLC controller 2 automatically resets to the state of waiting for the primary eluent configuration instruction.

[0058] The online automatic monitoring instrument 3 is a multi-parameter ion monitoring instrument; the multi-parameter ion monitoring instrument is configured to detect a variety of different target ions and allows setting corresponding target ion parameters and their concentration thresholds according to the composition of the current eluent, thereby enabling the elution equipment to be suitable for online continuous monitoring of ion exchange resin eluents with a variety of different compositions.

[0059] A plating wastewater treatment plant uses a resin process for targeted recovery of heavy metals. In traditional methods, the heavy metal concentration in the eluent is only 30-40 g / L after resin adsorption saturation, with an eluent utilization rate of approximately 50%-60%. After applying this new device, the eluent concentration is significantly increased to 60-90 g / L (approximately doubled), while the eluent utilization rate is greatly improved to 80%-90%, significantly reducing reagent costs.

[0060] The above-described embodiments are merely illustrative of one implementation of this utility model and are not intended to limit it. It should be noted that those skilled in the art can modify the technical solutions described in the above embodiments or make equivalent substitutions for some or all of the technical features; however, these modifications or substitutions do not cause the essence of the corresponding technical solutions to depart from the protection scope of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the protection scope of this utility model.

Claims

1. An automated elution device for ion exchange resin, characterized in that, include: Control module and elution execution module; The control module includes a PLC controller (2) and an online automatic monitoring instrument (3) connected to the PLC controller (2) via signals. The elution execution module includes: Elution container (4), used to hold the eluent; An automatic dosing device (5) is connected to an eluent tank (4); A stirrer (7) is located inside the eluent tank (4); The eluent transfer pump (8) is connected to the eluent tank (4) at its input end and to the eluent storage tank (9) at its output end. The elution process operates a pump (6) to drive the eluent to circulate between the ion exchange column (1) and the eluent tank (4).

2. The automated elution equipment for ion exchange resin according to claim 1, characterized in that, The online automatic monitoring instrument (3) detects the target ion concentration in the eluent tank (4) in real time; the PLC controller (2) sends control commands to the automatic dosing device (5), the stirrer (7) and the eluent transfer pump (8) according to the preset concentration threshold and the feedback signal from the online automatic monitoring instrument (3).

3. The automated elution equipment for ion exchange resin according to claim 1, characterized in that, The PLC controller (2) is configured as follows: When the eluent tank (4) is empty, the primary eluent preparation command is triggered, controlling the automatic dosing device (5) to add a preset amount of reagent and start the stirrer (7) to dissolve the reagent; When the concentration of the target ion in the eluent is detected to be lower than the preset threshold, a reagent replenishment command is triggered, and the automatic dosing device (5) is controlled to quantitatively replenish the reagent and start the stirrer (7). When the target ion concentration is detected to reach the preset threshold, the transfer storage command is triggered, and the eluent transfer pump (8) is started to pump the eluent into the storage tank (9).

4. The automated elution equipment for ion exchange resin according to claim 1, characterized in that, After the eluent transfer is completed, the eluent tank (4) returns to an empty state, and the PLC controller (2) automatically resets to the state of waiting for the primary eluent configuration instruction.

5. The automated elution equipment for ion exchange resin according to claim 1, characterized in that, The online automatic monitoring instrument (3) is a multi-parameter ion monitoring instrument; the multi-parameter ion monitoring instrument is configured to detect a variety of different target ions and allows setting corresponding target ion parameters and their concentration thresholds according to the composition of the current eluent, thereby enabling the elution equipment to be suitable for online continuous monitoring of ion exchange resin eluents with a variety of different compositions.

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