A method and system for targeted separation and recovery of ions in complex liquid phase

Abstract

This invention relates to a method and system for the targeted separation and recovery of target ions in a complex liquid phase. The method includes obtaining a liquid to be treated containing a target ion complex, coexisting ions, and a complexing agent; introducing the liquid to be treated into a main flow channel through the main inlet of a separation channel to form a main liquid flow passing unidirectionally along the collection interface; and introducing a decomplexing liquid into a boundary flow channel adjacent to the collection interface through a boundary inlet of the separation channel, so that the decomplexing liquid flows in the same direction as the main liquid flow along the collection interface, forming a boundary decomplexing liquid layer adjacent to the main liquid flow. By limiting the decomplexing position of the target ion complex to the boundary between the boundary decomplexing liquid layer and the main liquid flow, and by allowing the generated target ions to directly enter the collection interface, the method reduces the possibility of the target ions migrating synchronously with coexisting ions after being released as a whole in the main liquid phase, thereby relatively improving the stability of the targeted separation and recovery of target ions.

Description

Technical Field

[0001] This invention belongs to the field of complex liquid phase separation technology, and specifically relates to a method and system for the directional separation and recovery of target ions in complex liquid phases. Background Technology

[0002] When recovering target ions from complex liquid phases containing complexing agents, existing treatment approaches typically focus on improving separation rate and recovery purity. In engineering, the common practice is to first remove the complexation state of the target ions by adding acid, alkali, redox adjustment, or competitive ligand replacement, and then combine adsorption, ion exchange, membrane separation, or precipitation separation to complete the subsequent recovery.

[0003] Taking the continuous reuse of electroplating complex waste liquid as an example, the liquid phase often contains target metal ions, complexing agents, coexisting metal ions, and high concentrations of background salts. Furthermore, the treatment process must meet conditions such as uninterrupted operation, limited reagent addition, and the purity of the recovered liquid must directly meet the requirements for reuse. Under these circumstances, the aforementioned treatment methods will repeatedly exhibit the following phenomenon: once the overall complex is broken in the main liquid phase, the target ions and coexisting ions will be released simultaneously in the same liquid phase volume and simultaneously contact the subsequent separation medium, resulting in co-adsorption, co-deposition, or synchronous migration. This leads to an increase in the load at the separation end and an increase in the entrainment of impurities at the elution end. Ultimately, it is difficult to maintain both the purity and stability of the recovered target ions. The fundamental reason is that the process of the target ions changing from the complexed state to the separable state occurs inside the main liquid phase, causing the target ions to lose the conditions for directional transfer before entering the collection stage. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a method and system for the directional separation and recovery of target ions in complex liquid phases. By causing the target ion complex to migrate and disintegrate at the interface between the adjacent disintegration liquid layer and the bulk liquid flow, and then directly bind at the position adjacent to the collection interface, the directional transfer of the target ion from disintegration to collection is achieved, thereby solving the problems mentioned in the background art.

[0005] This invention provides a method for the targeted separation and recovery of target ions in complex liquid phases, comprising the following steps:

[0006] S1. Obtain the liquid to be treated containing the target ion complex, coexisting ions and complexing agent, and introduce the liquid to be treated into the main flow channel through the main inlet of the separation channel to form a main liquid flow that passes unidirectionally along the collection interface;

[0007] S2. The decomposition liquid is introduced into the adjacent flow channel of the collection interface through the adjacent inlet of the separation channel, so that the decomposition liquid flows in the same direction as the main liquid flow along the collection interface, forming an adjacent decomposition liquid layer adjacent to the main liquid flow.

[0008] S3. Control the component exchange between the adjacent decomplexing liquid layer and the main liquid flow only at the interface between the two liquid layers, so that the target ion complex completes decomplexing and generates the target ion when it migrates from the main liquid flow to the adjacent decomplexing liquid layer, and obtains the target ion generation layer adjacent to the collection interface.

[0009] S4. After the target ions in the target ion generation layer are generated, they directly combine with the collection interface, and the target ion complexes that have not migrated into the target ion generation layer, the uncomplexed components and coexisting ions are exported from the separation channel with the bulk liquid flow, so as to obtain the collection interface loaded with target ions and the separation mother liquor.

[0010] S5. Contact the collection interface loaded with target ions with the eluent or conversion solution so that the target ions detach from the collection interface and enter the recovery solution or are converted into the recovery solid phase, thereby obtaining the target ion recovery solution or the target ion recovery product.

[0011] Further, S1 includes the following steps:

[0012] S1-1. Measure the flow path length from each liquid inlet set along the extension direction of the main inlet to the inlet of the main flow channel confluence section, and determine the liquid flow cross-sectional area of ​​each liquid inlet according to the inverse ratio of each flow path length to obtain the liquid inlet group.

[0013] S1-2. The liquid to be treated is introduced into each inlet, and the liquid to be treated output from each inlet enters the main flow channel through the corresponding guide channel to obtain multiple parallel liquid flows.

[0014] S1-3. Multiple parallel liquid streams are spread out and merged at the inlet of the confluence section along the direction of the collection interface to obtain the main liquid stream that passes through the collection interface in one direction.

[0015] Further, S2 includes the following steps:

[0016] S2-1. Measure the flow path length from each branch inlet set along the extension direction of the collection interface to the inlet of the confluence section of the adjacent flow channel, and determine the liquid-passing cross-sectional area of ​​each branch inlet according to the inverse ratio of each flow path length to obtain the branch inlet group.

[0017] S2-2. The anti-complexing fluid is introduced into each branch inlet, and the anti-complexing fluid output from each branch inlet is allowed to enter the adjacent flow channel through the corresponding boundary guide slot, resulting in multiple parallel anti-complexing fluid flows.

[0018] S2-3. Multiple parallel decomposition fluid flows are spread out and merged at the inlet of the confluence section along the extension direction of the collection interface to obtain a neighboring decomposition fluid layer that flows in the same direction as the main fluid flow along the collection interface.

[0019] Further, S3 includes the following steps:

[0020] S3-1. Divide the boundary between the adjacent decomplexing liquid layer and the main liquid flow into multiple sequentially connected exchange sections along the main liquid flow direction. Collect the target ion complex concentration, decomplexing component concentration, main liquid flow rate and adjacent decomplexing liquid layer flow rate at the inlet of each exchange section. Perform median filtering and adjacent difference operation on the continuous collected values ​​of the same exchange section in time order. Calculate the residence time, concentration gradient and input quantity of each exchange section based on the filtered concentration value, flow rate value and exchange section length to obtain the exchange section state set.

[0021] S3-2. Using the target ion complex input, uncomplexing component input, residence time and concentration gradient of each exchange segment as input, and according to the constraints that the reduction of the target ion complex is equal to the component exchange amount, the reduction of the uncomplexing component is equal to the uncomplexing amount, the generation of the target ion is equal to the uncomplexing amount, and the output of each exchange segment is not greater than the corresponding input amount, a joint solution sequence of component exchange amount, uncomplexing amount and residual amount of each exchange segment is established. Then, the segment-by-segment iterative update is performed according to the weighted sum of the exchange residual, uncomplexing residual and inter-segment residual connection residual. After each update, the negative value is reset to zero and the value exceeding the corresponding input amount is reset to the corresponding input amount, thus obtaining the forward uncomplexing sequence.

[0022] S3-3. Write the residual amount of the previous exchange segment in the forward uncomplexing sequence into the input amount of the next exchange segment. Perform forward recursive recalculation on all exchange segments. Then, starting from the target ion generation amount, uncomplexing component residual amount, and target ion complex residual amount of the last exchange segment, perform reverse back substitution recalculation. Then, merge and update the forward recursive recalculation result and the reverse back substitution recalculation result of the same exchange segment according to the weights after normalizing the reciprocal of their respective residuals. Repeat the forward recursive recalculation, reverse back substitution recalculation, and fusion update until the component exchange amount, uncomplexing amount, and residual amount of each exchange segment are consistent in two adjacent updates after rounding according to the smallest unit of measurement corresponding to the acquisition resolution, thus obtaining a converged exchange sequence.

[0023] S3-4. According to the convergent exchange sequence, the target ion complex in the main liquid flow is controlled to migrate into the adjacent uncomplexing liquid layer segment by segment through each exchange segment and complete the uncomplexing segment by segment. The target ion generating liquid layers adjacent to the collection interface of each exchange segment are sequentially connected along the flow direction of the main liquid flow to obtain the target ion generating layer adjacent to the collection interface.

[0024] Further, S4 includes the following steps:

[0025] S4-1. Divide the collection interface into multiple sequentially connected segments along the main liquid flow direction. Measure the target ion generation, target ion complex residue, unresolved complex component, coexisting ion quantity, and interface vacancy quantity at the inlet of each segment to obtain the segment input set.

[0026] S4-2. Perform binding amount determination operation on each binding segment. When the target ion generation amount is not higher than the interface vacancy amount, the target ion binding amount is determined as the target ion generation amount. When the target ion generation amount is higher than the interface vacancy amount, the target ion binding amount is determined as the interface vacancy amount. The result of subtracting the target ion binding amount from the interface vacancy amount is determined as the remaining vacancy amount, thus obtaining the forward binding sequence.

[0027] S4-3. Subtract the target ion binding amount from the target ion generation amount in each binding segment, the residual amount of the target ion complex, the amount of unresolved complex components, and the amount of coexisting ions are written into the input of the next binding segment. The binding amount determination operation is repeated for the next binding segment until the last binding segment is reached to obtain the complete binding sequence.

[0028] S4-4. According to the full-segment binding sequence, the target ions in the target ion generation layer of each binding segment are bound to the collection interface segment by segment. Unbound target ions, target ion complexes that have not migrated into the target ion generation layer, uncomplexed components and coexisting ions are merged into the main liquid flow and discharged out of the separation channel to obtain the collection interface loaded with target ions and the separation mother liquor.

[0029] Further, S5 includes the following steps:

[0030] S5-1. Measure the target ion loading of each binding segment on the collection interface loaded with target ions, and determine the amount and order of eluent or conversion solution introduced into each binding segment according to the target ion loading of each binding segment to obtain the segment sequence processing set.

[0031] S5-2. According to the segment processing set, the eluent or conversion solution is sequentially introduced into each binding segment, and the eluent or conversion solution in each binding segment is brought into contact with the collection interface of the corresponding binding segment, so that the target ions on the binding segment leave the collection interface and enter the liquid phase or react with the conversion solution to generate a solid phase, thus obtaining the recovery stream of each binding segment.

[0032] S5-3. The recovery streams from each binding segment are sequentially discharged and collected into the target ion recovery liquid in the order of introduction, or the solid phases generated from each binding segment are sequentially collected and collected into the target ion recovery product.

[0033] The present invention also provides a targeted separation and recovery system for target ions in complex liquid phases, the targeted separation and recovery system comprising:

[0034] The flow guiding module is used to acquire the liquid to be treated containing the target ion complex, coexisting ions and complexing agent, and to introduce the liquid to be treated into the main flow channel through the main inlet of the separation channel to form a main liquid flow that passes unidirectionally along the collection interface;

[0035] The decomposition module is used to introduce the decomposition liquid from the adjacent inlet of the separation channel into the adjacent flow channel adjacent to the collection interface, so that the decomposition liquid flows in the same direction and parallel to the main liquid flow along the collection interface, forming an adjacent decomposition liquid layer adjacent to the main liquid flow.

[0036] The migration and decomplexing module is used to control the component exchange between the adjacent decomplexing liquid layer and the main liquid flow to occur only at the interface between the two liquid layers, so that the target ion complex completes decomplexing and generates the target ion when migrating from the main liquid flow to the adjacent decomplexing liquid layer, and a target ion generation layer adjacent to the collection interface is obtained.

[0037] The interface bonding module is used to enable the target ions in the target ion generation layer to directly bond with the collection interface after generation, and to export the target ion complexes, uncomplexed components and coexisting ions that have not migrated into the target ion generation layer from the separation channel along with the bulk liquid flow, so as to obtain the collection interface loaded with target ions and the separation mother liquor.

[0038] The recovery module is used to bring the collection interface loaded with target ions into contact with the eluent or conversion solution, so that the target ions detach from the collection interface and enter the recovery solution or are converted into the recovery solid phase, thereby obtaining the target ion recovery solution or the target ion recovery product.

[0039] Beneficial effects

[0040] 1. This invention limits the dissociation site of the target ion complex to the interface between the adjacent dissociation liquid layer and the main liquid flow, and allows the generated target ions to directly enter the collection interface, thereby reducing the situation where the target ions migrate synchronously with coexisting ions after being released as a whole in the main liquid phase, thus relatively improving the stability of the directional separation and recovery of target ions.

[0041] 2. This invention forms the main liquid flow and the adjacent decomplexing liquid layer respectively by the liquid to be treated and the decomplexing liquid, and keeps them flowing in the same direction along the collection interface. This concentrates the component exchange in the interface area between the two liquid layers, thereby reducing the decomplexing range and reducing the volume of irrelevant liquid phase participating in the decomplexing process, which alleviates the increase in load at the separation end.

[0042] 3. This invention divides the interface into exchange sections along the flow direction and calculates the component exchange amount, decomplexing amount and residual amount for each section, so that the migration, decomplexing and formation processes of the target ion complex have a continuous connection, thereby relatively reducing the impact of local decomplexing mismatch on the subsequent collection process.

[0043] 4. This invention divides the collection interface into binding segments along the flow direction and determines the target ion binding amount of each binding segment based on the target ion generation amount and the interface vacancy amount, so that the target ion generation process and the interface binding process correspond to each segment, thereby relatively suppressing the diffusion and escape of unbound target ions.

[0044] 5. This invention determines the order and amount of eluent or conversion solution introduced based on the target ion loading of each binding segment, so that the recovery stage corresponds to the loading state of the preceding interface, thereby reducing the impact of impurity entrainment and uneven treatment at the elution end, and balancing the purity of the recovered solution and the stability of the recovery process within a certain range. Attached Figure Description

[0045] Figure 1 This is a flowchart of the method steps of the present invention.

[0046] Figure 2 This is a schematic diagram of the system modules of the present invention. Detailed Implementation

[0047] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined by the appended claims.

[0048] Example 1

[0049] Reference Figure 1 This embodiment provides a method for the targeted separation and recovery of target ions in a complex liquid phase, including:

[0050] S1. Obtain the liquid to be treated containing the target ion complex, coexisting ions and complexing agent, and introduce the liquid to be treated into the main flow channel through the main inlet of the separation channel to form a main liquid flow that passes unidirectionally along the collection interface;

[0051] In this embodiment, S1 is used to form a main liquid flow that extends along the collection interface on the inlet side of the separation channel, so that the subsequently introduced decomposition liquid can form an adjacent and parallel flow on the collection interface side, and so that the two liquids have a certain spatial positional relationship before entering the component exchange zone. For this purpose, instead of using a single port for direct liquid inlet, the flow path length from each liquid inlet to the inlet of the main flow channel confluence section is determined first, and then the liquid flow cross-sectional area of ​​each liquid inlet is allocated according to the length of each flow path, so that the liquid to be treated output under different liquid inlet paths spreads out along the collection interface extension direction when entering the main flow channel.

[0052] The implementation process includes the following steps:

[0053] In S1-1, the structural position data of the main inlet, the main flow channel confluence section inlet, and each liquid inlet are first obtained. Each liquid inlet is arranged sequentially along the extension direction of the collection interface, and the main flow channel confluence section inlet serves as the common confluence location for all streams of liquid to be treated before entering the main flow channel. Then, using the actual liquid flow centerline from the center of each liquid inlet to the center of the main flow channel confluence section inlet as the measurement path, the flow path length corresponding to each liquid inlet is measured one by one, and each flow path length is written into a length sequence. After obtaining the length sequence, the reciprocal of each flow path length is taken to obtain the allocation value corresponding to each liquid inlet. Then, all allocation values ​​are summed and the distribution is calculated according to the proportion of each allocation value to the total. The total liquid flow cross-sectional area of ​​the main inlet is allocated to obtain the target liquid flow cross-sectional area of ​​each inlet, and an inlet group is formed accordingly. The starting point for measuring the flow path length is the liquid flow center of the corresponding inlet, and the ending point is the liquid flow center of the main flow channel confluence section inlet. The liquid flow cross-sectional area is the actual liquid flow cross-sectional area of ​​the corresponding inlet. When the liquid flow center line of any inlet contains a turning path, the flow path length of the inlet is obtained by accumulating the line segment lengths between adjacent path nodes. When the actual liquid flow cross-sectional area after processing does not match the target liquid flow cross-sectional area, the liquid flow cross-sectional area of ​​the inlet is re-adjusted, and the original recorded value is overwritten with the re-measured actual liquid flow cross-sectional area.

[0054] In S1-2, the inlet group formed in S1-1 is read, and the total input flow rate of the liquid to be treated and the structural data of the guide channel corresponding to each inlet are obtained. Then, according to the ratio of the target liquid flow cross-sectional area of ​​each inlet to the total liquid flow cross-sectional area of ​​the main inlet, the total input flow rate of the liquid to be treated is allocated to each inlet, and the input flow rate corresponding to each inlet is obtained. Then, the liquid to be treated is introduced into each inlet, so that the liquid to be treated output from each inlet enters the main flow channel through the corresponding guide channel, forming multiple parallel liquid flows. The inlet of each guide channel is connected to the corresponding inlet, and the outlet of each guide channel faces the inlet of the main flow channel confluence section. Each guide channel limits the output of the corresponding liquid to be treated. Position and output direction are set to ensure that each stream of liquid to be treated is kept separate before entering the main flow channel; after the parallel liquid flows are formed, the input flow rate, output position, and output direction of each parallel liquid flow are written into the parallel liquid flow record set; when the measured input flow rate of any inlet does not match the allocated input flow rate, a liquid flow check is performed on the inlet and the corresponding guide channel, the adhering material is removed, the liquid to be treated is reintroduced, and the input flow rate is measured again; when the liquid flow output from any guide channel deviates from the inlet of the main flow channel confluence section, the orientation of the guide channel outlet is adjusted and the liquid to be treated is reintroduced until the corresponding liquid flow meets the predetermined output position and output direction before being written into the parallel liquid flow record set.

[0055] In S1-3, the parallel flow record set, the position data of the main flow channel confluence section inlet, and the extension direction data of the collection interface are read, and the extension direction of the collection interface is used as the development direction of each parallel flow. Then, each parallel flow is controlled to enter the main flow channel confluence section inlet sequentially according to the output position, so that adjacent parallel flows connect end to end at the main flow channel confluence section inlet along the extension direction of the collection interface to form a continuous flow band. Then, the continuous flow band is advanced along the main flow channel outlet direction to form a main flow that passes through the collection interface in one direction. The inlet width, flow rate, and advancement direction of the main flow are written into the main flow record set. The flow record set is provided for subsequent S2 reading. The main flow direction is from the main inlet to the outlet of the separation channel. No reversal branches or lateral return branches are set in the main flow channel. When two adjacent parallel flow streams are interrupted at the inlet of the main flow channel confluence section, the output position and input flow rate in the parallel flow record set are read back. The input flow rate of the corresponding inlet is redistributed and then introduced again. When the main flow stream is partially reversed in the main flow channel, the outlet orientation of the corresponding guide channel and the connection position of the main flow channel confluence section inlet are corrected, and the original record set is replaced with the corrected main flow record set.

[0056] Through the above process, the liquid to be treated does not directly converge into a single stream at the main inlet. Instead, the liquid flow area of ​​each inlet is first allocated according to the flow path length from each inlet to the inlet of the main flow channel confluence section. Then, it is introduced into the main flow channel in streams through the guide channel. At the inlet of the main flow channel confluence section, it spreads out and merges along the extension direction of the collection interface. This ensures that the main liquid flow has a defined inlet width, propulsion direction, and spatial spread before entering the subsequent parallel flow area. The subsequent adjacent disintegrating liquid layer can then enter along the side of the collection interface and maintain an adjacent position to the main liquid flow. In practical applications: when the inlet side of the separation channel is along the collection interface... When four inlets are set in the direction of the collection interface extension, the flow path length from each of the four inlets to the inlet of the main flow channel confluence section is measured first. Then, the cross-sectional area and input flow rate of the four inlets are determined according to the reciprocal ratio of the four flow path lengths. The liquid to be treated, containing the target ion complex, coexisting ions and complexing agent, is introduced into the four inlets respectively. After passing through four guide channels, it is output as four parallel liquid streams. The four parallel liquid streams are connected at the inlet of the main flow channel confluence section along the direction of the collection interface extension to form the main liquid stream. Subsequently, the decomplexing liquid introduced from the adjacent inlet can form an adjacent decomplexing liquid layer on one side of the collection interface, adjacent to the main liquid stream.

[0057] S2. The decomposition liquid is introduced into the adjacent flow channel of the collection interface through the adjacent inlet of the separation channel, so that the decomposition liquid flows in the same direction as the main liquid flow along the collection interface, forming an adjacent decomposition liquid layer adjacent to the main liquid flow.

[0058] In this embodiment, S2 is used to form a neighboring disintegration liquid layer adjacent to and flowing parallel to the main liquid flow on one side of the collection interface. This allows the disintegration liquid to spread along the collection interface before entering the component exchange position and maintain a layered parallel relationship with the main liquid flow, thereby limiting the migration and disintegration position of the subsequent target ion complex to near the junction of the two liquid layers. For this purpose, instead of directly injecting liquid through a single neighboring inlet, the flow path length from each branch inlet to the inlet of the neighboring flow channel confluence section is first determined, and then the liquid flow cross-sectional area of ​​each branch inlet is allocated according to the flow path length. This allows the disintegration liquid output from each branch inlet to form a continuous disintegration liquid band along the collection interface when entering the neighboring flow channel, and this continuous disintegration liquid band advances in the same direction as the main liquid flow in the output direction.

[0059] The implementation process includes the following steps:

[0060] In S2-1, the structural location data of the neighboring inlet, the neighboring channel confluence section inlet, and each branch inlet are first obtained. Each branch inlet is sequentially set along the extension direction of the collection interface, and the neighboring channel confluence section inlet serves as the common confluence location for each stream of disintegrating fluid before entering the neighboring channel. Then, using the actual liquid flow centerline from the center of each branch inlet to the center of the neighboring channel confluence section inlet as the measurement path, the flow path length corresponding to each branch inlet is measured one by one, and each flow path length is written into the branch inlet length sequence. After obtaining the branch inlet length sequence, the reciprocal of each flow path length is taken to obtain the allocation value corresponding to each branch inlet. Then, all allocation values ​​are summed and their proportions relative to the total are calculated. The total liquid flow cross-sectional area of ​​the adjacent inlets is allocated proportionally to obtain the target liquid flow cross-sectional area of ​​each branch inlet, and a branch inlet group is formed accordingly. The starting point for measuring the flow path length is the liquid flow center of the corresponding branch inlet, and the ending point is the liquid flow center of the inlet of the adjacent flow channel confluence section. The liquid flow cross-sectional area is the actual liquid flow cross-sectional area of ​​the corresponding branch inlet. When the liquid flow path of any branch inlet contains a turning position, the flow path length of the branch inlet is obtained by accumulating the line segment lengths between adjacent path nodes. When the actual liquid flow cross-sectional area after processing does not match the target liquid flow cross-sectional area, the liquid flow cross-sectional area of ​​the branch inlet is re-adjusted, and the original recorded value is overwritten with the actual liquid flow cross-sectional area after re-measurement.

[0061] In S2-2, the branch inlet group formed in S2-1 is read, and the total input flow rate of the uncomplexing fluid and the boundary guide slot structure data corresponding to each branch inlet are obtained. Then, according to the ratio of the target liquid flow cross-sectional area of ​​each branch inlet to the total liquid flow cross-sectional area of ​​the adjacent inlet, the total input flow rate of the uncomplexing fluid is allocated to each branch inlet to obtain the input flow rate corresponding to each branch inlet. The uncomplexing fluid is then introduced into each branch inlet, so that the uncomplexing fluid output from each branch inlet enters the adjacent flow channel through the corresponding boundary guide slot, forming multiple parallel uncomplexing fluid flows. The inlet of each boundary guide slot is connected to the corresponding branch inlet, the outlet of each boundary guide slot is opened on the side of the collection interface, and the slot opening direction of each boundary guide slot points to the inlet of the adjacent flow channel confluence section and extends along the collection interface. The output position and direction of the corresponding uncomplexing fluid are defined so that each uncomplexing fluid flows along the collection interface before entering the adjacent flow channel. After multiple parallel uncomplexing fluid flows are formed, the input flow rate, output position, and output direction of each parallel uncomplexing fluid flow are written into the uncomplexing fluid flow record set for S2-3 to read. When the measured input flow rate of any inlet does not match the allocated input flow rate, a fluid flow check is performed on the inlet and the corresponding boundary guide slit. After removing the adhering material, the uncomplexing fluid is reintroduced and the input flow rate is measured again. When the uncomplexing fluid output from any boundary guide slit deviates from the collection interface, the slit opening orientation of the boundary guide slit is adjusted and the uncomplexing fluid is output again until the corresponding uncomplexing fluid flow flows along the collection interface before being written into the uncomplexing fluid flow record set.

[0062] In S2-3, the disintegration fluid flow record set, the position data of the inlet of the adjacent flow channel confluence section, the extension direction data of the collection interface, and the main fluid flow record set output from S1 are read. The extension direction of the collection interface is used as the development direction of each parallel disintegration fluid flow, and the propulsion direction of the main fluid flow is used as the exit direction of the adjacent disintegration fluid layer. Then, each parallel disintegration fluid flow is controlled to enter the inlet of the adjacent flow channel confluence section in sequence according to the output position, so that two adjacent parallel disintegration fluid flows connect end to end at the inlet of the adjacent flow channel confluence section along the extension direction of the collection interface to form a continuous disintegration fluid band. Then, the continuous disintegration fluid band is propagated along the exit direction to form an adjacent disintegration fluid layer that flows in the same direction as the main fluid flow along the collection interface. The inlet width, flow rate, and propulsion direction of the adjacent disintegration fluid layer are written into the adjacent disintegration fluid record set. The layer record set is used for subsequent S3 reading. The neighboring uncomplexing liquid layer is located between the collection interface and the main liquid flow. The collection interface constitutes one side boundary of the neighboring flow channel. The main liquid flow and the neighboring uncomplexing liquid layer advance in parallel within the parallel flow region without any head-on impact inlet. When two adjacent parallel uncomplexing liquid flows are interrupted at the inlet of the confluence section of the neighboring flow channel, the output position and input flow rate in the uncomplexing liquid flow record set are read back. The input flow rate of the corresponding branch inlet is redistributed and then reintroduced. When the neighboring uncomplexing liquid layer enters the parallel flow region without adhering to the collection interface or crosses with the main liquid flow, the position of the corresponding boundary guide slot, the slot direction, and the connection position of the confluence section inlet of the neighboring flow channel are corrected. The original record set is replaced with the corrected neighboring uncomplexing liquid layer record set.

[0063] Through the above process, the decomposition liquid does not directly merge into a single stream from the adjacent inlet and enter the adjacent channel. Instead, it first distributes the liquid flow cross-sectional area of ​​each branch inlet according to the flow path length from each branch inlet to the inlet of the adjacent channel confluence section. Then, it is introduced into the adjacent channel in streams through the boundary guide slot. At the inlet of the adjacent channel confluence section, it spreads out and merges along the extension direction of the collection interface. This ensures that the adjacent decomposition liquid layer has a definite inlet width, propulsion direction, and boundary position before entering the subsequent component exchange position. The subsequent main liquid flow and the adjacent decomposition liquid layer can then maintain an adjacent and parallel flow relationship on one side of the collection interface, and the component exchange position is constrained at the junction of the two liquid layers.

[0064] In practical applications: When four branch inlets are set along the extension direction of the collection interface at the adjacent inlet, the flow path length from the four branch inlets to the inlet of the adjacent flow channel confluence section is measured first. Then, the liquid cross-sectional area and input flow rate of the four branch inlets are determined according to the reciprocal ratio of the four flow path lengths. The disintegrating liquid is introduced into the four branch inlets respectively, and output as four parallel disintegrating liquid flows through the four boundary guide slits. The four parallel disintegrating liquid flows are connected at the inlet of the adjacent flow channel confluence section along the extension direction of the collection interface to form an adjacent disintegrating liquid layer. The adjacent disintegrating liquid layer is located between the collection interface and the main liquid flow and advances in the same direction as the main liquid flow. Subsequently, the target ion complex in the main liquid flow migrates to the adjacent disintegrating liquid layer at the junction of the two liquid layers and enters the subsequent disintegration process.

[0065] S3. Control the component exchange between the adjacent decomplexing liquid layer and the main liquid flow only at the interface between the two liquid layers, so that the target ion complex completes decomplexing and generates the target ion when it migrates from the main liquid flow to the adjacent decomplexing liquid layer, and obtains the target ion generation layer adjacent to the collection interface.

[0066] In this embodiment, S3 is used to confine the target ion complex in the main liquid flow to the boundary between the adjacent decomplexing liquid layer and the main liquid flow to complete the migration and decomplexing, so that the target ion is not released as a whole in the main liquid flow phase, but is generated at the location adjacent to the collection interface and enters the subsequent interface binding path. To achieve this process, the boundary is first collected and the state is calculated in segments along the flow direction of the main liquid flow. Then, the forward decomplexing result is obtained according to the material conservation relationship of each exchange segment. Subsequently, the forward decomplexing result is recursively recalculated and back-substituted recalculated in combination with the inter-segment transfer relationship, and finally the convergent exchange sequence used for actual control is obtained.

[0067] The implementation process includes the following steps:

[0068] In S3-1, the interface between the neighboring disintegrating liquid layer and the main liquid flow is first discretized to limit the subsequent migration, disintegration, and generation processes to calculable exchange locations. The inputs are the main liquid flow record set, the neighboring disintegrating liquid layer record set, the interface length data, the sampling period, and the acquisition resolution. During processing, the interface is divided into multiple sequentially connected exchange segments along the main liquid flow direction according to the principle of equal length. The starting section of each exchange segment is taken as the inlet of that exchange segment, and the length of each exchange segment is written into the exchange segment length sequence. The exchange segment length is the result of dividing the total length of the interface by the number of exchange segments, which is given by a preset configuration. Subsequently, at the inlet of each exchange segment, the concentration of the target ion complex in the main liquid flow, the concentration of the disintegrating component in the neighboring disintegrating liquid layer, the main liquid flow rate, and the neighboring disintegrating liquid layer flow rate are simultaneously collected, forming a sequence based on the sampling time. The concentration and flow rates are arranged, and then each concentration and flow rate sequence in the same exchange segment is subjected to median filtering in chronological order to remove instantaneous peak sampling values. Adjacent difference operations are then performed on the filtered sequences to obtain the concentration and flow rate changes of each exchange segment. After obtaining the filtering results, the residence time of the exchange segment is calculated by dividing the length of the exchange segment by the average of the linear velocity of the bulk fluid and the linear velocity of the adjacent disintegrating fluid layer. The concentration gradient is calculated by dividing the difference between the concentration of the target ion complex and the concentration of the disintegrating component at the inlet of the same exchange segment by the length of the exchange segment. The target ion complex input is obtained by multiplying the filtered target ion complex concentration by the bulk fluid flow rate and the sampling period. The disintegrating component input is obtained by multiplying the filtered disintegrating component concentration by the adjacent disintegrating fluid layer flow rate and the sampling period. Finally, the exchange segment state set is formed and written into the subsequent S3-2 read.

[0069] When the concentration or flow rate value at a certain sampling time of any exchange segment is missing, the corresponding values ​​at the previous and next sampling times of the same exchange segment are read, the arithmetic average is taken, and the missing value is then written. When two consecutive sampling times are missing, the most recent complete sampling value of the exchange segment is read and written, and the source of the missing value is marked in the exchange segment status set.

[0070] In S3-2, the forward migration and discomplexation results of the target ion complex at the interface are first calculated based on the input states of each exchange segment to provide the initial exchange sequence along the flow direction of the bulk liquid. The input quantity is the exchange segment state set written in S3-1. During processing, three quantities to be determined are established for each exchange segment: component exchange quantity, discomplexation quantity, and residual quantity. Among them, the component exchange quantity represents the amount of target ion complex that migrates from the bulk liquid into the adjacent discomplexation liquid layer within the exchange segment, the discomplexation quantity represents the amount of target ion complex that has completed discomplexation within the exchange segment, and the residual quantity represents the amount that remains after the exchange segment is processed. At the exit of this exchange section, the amount of target ion complex and the amount of uncomplexing component are transmitted to the next exchange section. Then, a joint solution sequence is established according to the following relationships: the reduction of target ion complex equals the amount of component exchange, the reduction of uncomplexing component equals the amount of uncomplexing, the amount of target ion generated equals the amount of uncomplexing, the output of target ion complex is not higher than the input of target ion complex, and the output of uncomplexing component is not higher than the input of uncomplexing component. Among them, the reduction of target ion complex is the input of target ion complex minus the output of target ion complex, and the reduction of uncomplexing component is the input of uncomplexing component minus the output of uncomplexing component.

[0071] During the joint solution process, the initial value of the component exchange amount for each exchange segment is first set to the smaller of the target ion complex input amount and the theoretical exchange amount calculated according to the concentration gradient. The initial value of the uncomplexing amount is set to the smaller of the initial value of the component exchange amount and the input amount of the uncomplexing component. The initial value of the residual amount is set to the result of subtracting the corresponding consumption amount from the corresponding input amount. Then, the segment-by-segment iterative update is performed by weighting the exchange residual, the uncomplexing residual, and the inter-segment residual connection residual. Among them, the exchange residual is the difference between the reduction of the target ion complex and the component exchange amount, and the uncomplexing residual is the reduction of the uncomplexing component. The difference between the quantity and the unwrapping quantity is added to the difference between the target ion generation quantity and the unwrapping quantity. The inter-segment residual connection residual is the difference between the residual quantity of this exchange segment and the corresponding transfer term in the input quantity of the next exchange segment. The weights of the three types of residuals are given by the preset configuration and satisfy the condition that the sum of the weights is 1. After each update, the component exchange quantity, unwrapping quantity and residual quantity less than 0 are reset to 0, and the component exchange quantity, unwrapping quantity and residual quantity greater than the corresponding input quantity are reset to the corresponding input quantity, until all exchange segments complete one forward update, and the forward unwrapping sequence is obtained and written to the subsequent S3-3 read.

[0072] If, after an update, the component exchange amount of any exchange segment is higher than the target ion complex input amount and the uncomplexing amount is higher than the uncomplexing component input amount, the uncomplexing amount is first reset to the uncomplexing component input amount, then the component exchange amount is reset to the target ion complex input amount, and the residual amount of the exchange segment is recalculated and overwritten with the original recorded value.

[0073] In S3-3, the forward unwrapping sequence is first recalculated and the results are fused to eliminate the cumulative inter-segment bias caused by unidirectional updates. The inputs are the forward unwrapping sequence written in S3-2, the acquisition resolution, and the target ion generation, unwrapping component residue, and target ion complex residue of each exchange segment. During processing, the target ion complex residue and unwrapping component residue of the previous exchange segment are first written into the target ion complex input and unwrapping component input of the next exchange segment, respectively. Then, a forward recursive recalculation is performed on all exchange segments according to the joint solution rules in S3-2 to obtain the forward recalculation result. Subsequently, starting from the target ion generation, unwrapping component residue, and target ion complex residue of the last exchange segment, the previous segments are written back one by one in the opposite direction to the forward recursion. In a single exchange segment, reverse back-substitution recalculation is performed to obtain the reverse recalculation result. Within the same exchange segment, the forward residual corresponding to the forward recalculation result and the reverse residual corresponding to the reverse recalculation result are calculated separately. The reciprocal of the forward residual is divided by the sum of the reciprocals of the forward and reverse residuals as the forward weight, and the reciprocal of the reverse residual is divided by the sum of the reciprocals of the forward and reverse residuals as the reverse weight. The forward weight is multiplied by the forward recalculation result, and the reverse weight is multiplied by the reverse recalculation result to obtain the fusion update result. When the forward residual is 0 and the reverse residual is not 0, the forward weight is 1 and the reverse weight is 0. When the reverse residual is 0 and the forward residual is not 0, the forward weight is 0 and the reverse weight is 1. When both the forward and reverse residuals are 0, the recalculation result of the current exchange segment is kept unchanged.

[0074] After obtaining the fusion update results, the forward recursive recalculation, reverse back substitution recalculation, and fusion update are repeatedly executed. After each round of fusion update, the component exchange amount, uncomplexing amount, and residual amount of each exchange segment are rounded according to the minimum measurement unit corresponding to the acquisition resolution. The minimum measurement unit is obtained by multiplying the concentration acquisition resolution by the corresponding flow acquisition resolution and then by the sampling period. When the component exchange amount, uncomplexing amount, and residual amount after rounding remain unchanged in two adjacent rounds, the recalculation is stopped and the converged exchange sequence is output and written to the subsequent S3-4 for reading. When any exchange segment has different material diameters corresponding to the forward recalculation results and the reverse recalculation results during the recalculation process, the three diameters of target ion complex amount, uncomplexing component amount, and target ion generation amount are first realigned, and then the residual calculation and weight fusion are performed.

[0075] In S3-4, the calculation results are first converted into the actual migration and discomplexation process at the interface based on the convergent exchange sequence, so that the target ions are continuously generated in the region adjacent to the collection interface. The input quantities are the convergent exchange sequence, the main fluid flow record set, and the neighboring discomplexation liquid layer record set written in S3-3. During processing, according to the component exchange amount in the convergent exchange sequence of each exchange segment, the target ion complexes in the main fluid flow are controlled to migrate into the neighboring discomplexation liquid layer at the interface of the corresponding exchange segment. The target ion complexes that migrate into the neighboring discomplexation liquid layer are controlled to complete discomplexation within the exchange segment according to the discomplexation amount of each exchange segment, thereby forming a target ion generating liquid layer at the position adjacent to the collection interface of each exchange segment. Then, the target ion generating liquid layers formed by each exchange segment are connected end to end according to the flow direction of the main fluid flow and merged sequentially, so that the previous The output boundary of the target ion generating liquid layer in one exchange segment is continuous with the input boundary of the target ion generating liquid layer in the next exchange segment, resulting in a target ion generating layer adjacent to the collection interface. The position data, target ion generation amount, and flow direction of this target ion generating layer are written into the target ion generating layer record set for subsequent S4 reading. When a break occurs between the target ion generating liquid layer of any exchange segment and the target ion generating liquid layer of the adjacent exchange segment, the component exchange amount and uncomplexation amount of the two exchange segments in the converged exchange sequence are read back. The corresponding exchange segment is recalculated by forward recursion and backward substitution, updated, and then reconnected. When the target ion generating liquid layer of any exchange segment deviates from the collection interface, the boundary position of the adjacent uncomplexation liquid layer of the exchange segment is corrected, and the target ion generating layer record set is re-exported.

[0076] Through the above process, S3 transforms the component exchange, migration, discomplexation, and generation locations at the interface between the two liquid layers into an execution chain that can be segmented for acquisition, calculated with conservation, recalculated backwards and forwards, and output convergently. This allows the target ion complex to maintain its original state in the main liquid flow, migrating into the adjacent discomplexation liquid layer only at the interface between the adjacent discomplexation liquid layer and the main liquid flow to complete discomplexation. The generated target ions form a continuous target ion generation layer along the collection interface for subsequent interface binding and reading. In practical applications: when the total length of the interface is 40 mm and the number of exchange segments is 8, the interface can be divided into 8 equal-length exchange segments, and sampling can be performed simultaneously at the inlet of each exchange segment. The system collects the concentration of the target ion complex, the concentration of the uncomplexing component, the flow rate of the bulk liquid, and the flow rate of the adjacent uncomplexing liquid layer, and forms an exchange segment state set according to the sampling period. Then, it first obtains the forward uncomplexing sequence according to the input amount, residence time, and concentration gradient of each exchange segment. Then, it writes the residual amount of the previous exchange segment into the input amount of the next exchange segment to perform forward recursive recalculation and backward substitution recalculation until the rounded component exchange amount, uncomplexing amount, and residual amount remain unchanged in the two rounds. Finally, based on the convergent exchange sequence, it controls the target ion complex to migrate into the adjacent uncomplexing liquid layer in the 8 exchange segments and complete the uncomplexing in sequence, forming a continuous target ion generation layer along the collection interface.

[0077] S4. After the target ions in the target ion generation layer are generated, they directly combine with the collection interface. The target ion complexes that have not migrated into the target ion generation layer, the uncomplexed components and coexisting ions are exported from the separation channel with the bulk liquid flow, so as to obtain the collection interface loaded with target ions and the separation mother liquor.

[0078] In this embodiment, S4 is used to transfer the target ions in the target ion generation layer adjacent to the collection interface into the collection interface, and to export various components that have not entered the binding path from the separation channel, so that the target ion generation process and the target ion binding process are continuously connected in the same export direction. This process is based on the target ion generation layer record set output by S3. First, the collection interface is segmented along the main liquid flow direction, and a material input port corresponding to the exchange section is established at the inlet of each binding section. Then, the binding amount is determined according to the interface vacancy amount of each binding section. Subsequently, the unbound target ions and the remaining components that have not entered the target ion generation layer are continued to be transferred along the main liquid flow until the last binding section completes the full-segment binding calculation. Based on this, the collection interface is controlled to load the target ions and export the separation mother liquor.

[0079] The implementation process includes the following steps:

[0080] In S4-1, the segmented apertures of the collection interface and the input apertures of each binding segment are first established so that the subsequent binding amount determination corresponds to a specific location. The input quantities are the target ion generation layer record set output from S3, the structural length data of the collection interface, the main fluid flow record set, and the initial site quantity data of the collection interface. During processing, the collection interface is divided into multiple sequentially connected binding segments along the main fluid flow direction. Each binding segment corresponds one-to-one with the exchange segment in S3 according to the flow direction. The inlet section of each binding segment is aligned with the output position of the corresponding exchange segment, and the length of each binding segment is written into the binding segment length sequence. Subsequently, the target ion generation amount output by the corresponding exchange segment is read at the inlet of each binding segment, and the amount of ions not migrated into the target ion generation layer by the corresponding exchange segment is read. The residual amount of the target ion complex is determined by reading the amount of unresolved complex components and coexisting ions output from the corresponding exchange section, and these four items are used as the inlet material amount for that binding section. When determining the amount of interface vacancies, for the first binding section, the amount of interface vacancies for the first binding section is obtained by subtracting the amount of bound target ions recorded at the end of the previous treatment cycle from the initial site amount of the first binding section. For the remaining binding sections, the amount of interface vacancies for the corresponding binding section is obtained by subtracting the amount of bound target ions recorded at the end of the previous treatment cycle from the initial site amount of the binding section. The initial site amount is given by the site measurement results after the collection interface is prepared, and the amount of bound target ions is given by the value recorded before elution at the end of the previous treatment cycle.

[0081] After completing all readings and calculations, a binding segment input set is formed and written to S4-2 for reading. When the record of the amount of bound target ions in any binding segment is missing, the record value after the end of the previous effective processing cycle of the binding segment is read and written. When the binding segment has no historical record since it was put into operation, the amount of bound target ions is set to 0 and the interface vacancy amount is calculated. When the calculated interface vacancy amount is negative, the interface vacancy amount of the binding segment is reset to 0 and the binding segment is marked as a full-load segment.

[0082] In S4-2, the binding amount that a binding segment can complete is first determined based on the target ion generation amount and the interface vacancy amount at the entrance of each binding segment, so that the target ions in the target ion generation layer are constrained by the site capacity when entering the collection interface; the input amount is the binding segment input set written in S4-1; during processing, a binding amount determination operation is performed on each binding segment. For each binding segment, the target ion generation amount is compared with the interface vacancy amount. When the target ion generation amount is not higher than the interface vacancy amount, the target ion binding amount is determined as the target ion generation amount. When the target ion generation amount is higher than the interface vacancy amount, the target ion binding amount is determined as the interface vacancy amount. The remaining vacancy amount is determined by subtracting the target ion binding amount from the interface vacancy amount. The amount of unbound target ions is then determined by subtracting the target ion binding amount from the target ion generation amount.

[0083] Subsequently, the amount of target ion bound, the amount of remaining vacancies, and the amount of unbound target ions in each binding segment are written into the forward binding sequence for S4-3 to read. Among them, the amount of coexisting ions, the amount of residual target ion complex, and the amount of undissolved complex components are not involved in the binding amount determination in this step, but are only retained as the amount of inlet material transferred along the main liquid flow. The reason is that the initial site amount and the amount of bound target ions recorded at the collection interface correspond to the target ion binding sites. The occupancy statistics are only performed on target ions. The amount of coexisting ions not written into the target ion binding site statistics is not included in the interface vacancy amount deduction. When the amount of target ion generated in any binding segment is missing, the amount of target ion generated output from the corresponding exchange segment is read and written before the determination is performed. When the amount of interface vacancy in any binding segment is missing, the initial site amount and the amount of bound target ions in that binding segment are read back, recalculated, and the original recorded value is overwritten.

[0084] In S4-3, the unbound materials from each binding segment are first written into the input port of the next binding segment, allowing the binding calculation to continue along the main liquid flow direction until the last binding segment. The input quantity is the forward binding sequence written in S4-2 and the binding segment input set formed in S4-1. During processing, starting from the first binding segment, the amount of unbound target ions, the residual amount of target ion complexes, the amount of undissolved complex components, and the amount of coexisting ions in that binding segment are written into the input quantity of the next binding segment. The target ion generation amount in the next binding segment is obtained by adding the target ion generation amount output from the corresponding exchange segment of that binding segment to the amount of unbound target ions written in the previous binding segment. The residual amount of target ion complexes in the next binding segment is obtained by adding the residual amount of target ion complexes output from the corresponding exchange segment of that binding segment to the amount of target ion complexes written in the previous binding segment. The amount of undissolved complex components and the amount of coexisting ions in the next binding segment are accumulated in the same way. After writing, the binding amount determination operation in S4-2 is repeated for the next binding segment to obtain the target ion binding amount, remaining vacancy amount, and unbound target ion amount for the next binding segment. Writing continues to the next binding segment until the last binding segment is completed and determined, resulting in a complete binding sequence. The complete binding sequence records the target ion binding amount, remaining vacancy amount, unbound target ion amount, target ion complex residue amount, undissolved complex component amount, and coexisting ion amount for each binding segment. When the target ion generation amount after writing to the next binding segment is higher than the sum of the target ion generation layer record amount of the next binding segment and the unbound target ion amount of the previous binding segment, the original writing value is overwritten by the sum of the target ion generation layer record amount of the next binding segment and the unbound target ion amount of the previous binding segment. When there is still an unbound target ion amount after the last binding segment is determined, the unbound target ion amount is written into the main fluid output amount record set.

[0085] In S4-4, the calculation results are first converted into binding results on the collection interface and exported results in the separation channel according to the full-segment binding sequence, so that the target ion loading and separation mother liquor formation are completed within the same processing cycle; the input quantities are the full-segment binding sequence, target ion generation layer record set, and main liquid flow record set written in S4-3; during processing, according to the target ion binding amount of each binding segment in the full-segment binding sequence, the target ions in the target ion generation layer of the corresponding binding segment contact the collection interface and complete binding, and the bound target ion amount record of the binding segment is updated according to the target ion binding amount of the binding segment, and then the interface vacancy amount record of the binding segment is updated according to the remaining vacancy amount of the binding segment, so that... The collection interface forms a collection interface loaded with target ions; then, the unbound target ions, target ion complexes that have not migrated into the target ion generation layer, undisintegrated components, and coexisting ions from each binding segment are collected into the main liquid flow and output to the outlet end of the separation channel along the outlet direction of the main liquid flow. All the exported materials are collected into the separation mother liquor. Among them, the unbound target ions are counted as the liquid phase target ion quantity in the separation mother liquor, and the target ion complexes, undisintegrated components, and coexisting ions retain their original component properties and are counted in the separation mother liquor. After the binding and export are completed, the updated amount of bound target ions, the amount of interface vacancies, and the amount of each exported material in each binding segment are written into the processing cycle end record set for subsequent S5 reading.

[0086] When the updated amount of bound target ions in any binding segment is higher than the initial site amount of that binding segment, the updated value is overwritten with the initial site amount of that binding segment, and the excess is written back as the amount of unbound target ions in that binding segment and included in the main fluid output record set. When any output material quantity record is missing, the difference between the total inlet material of that binding segment and the amount of bound target ions is subtracted and the original record value is overwritten.

[0087] Through the above process, S4 transfers the target ions in the target ion generation layer to the collection interface, and incorporates the target ion generation amount, interface vacancy amount, unbound target ion amount, target ion complex residue amount, undisintegrated component amount, and coexisting ion amount into the same segment calculation caliber, so that the site occupancy, inter-segment transfer, and separation mother liquor export at the collection interface have a corresponding relationship; wherein, the interface vacancy amount is calculated from the initial site amount and the amount of bound target ions, the binding segment and the exchange segment correspond one-to-one according to the flow direction, and the material that has not completed binding in the previous binding segment is written into the next binding segment according to the same material caliber, so that the target ion loading process and the main liquid export process continue to advance in the same export direction.

[0088] In practical applications: When the collection interface is divided into eight binding segments along the main liquid flow direction and each of the eight binding segments corresponds to one of the eight exchange segments, the target ion generation amount, target ion complex residue amount, unresolved complex component amount, and coexisting ion amount output from the eight exchange segments can be read first. The interface vacancy amount of the eight binding segments can be calculated by combining the initial site amount of the eight binding segments with the amount of target ions already bound after the end of the previous processing cycle. Then, the binding amount is determined for the first binding segment, and the amount of unbound target ions, target ion complex residue amount, unresolved complex component amount, and coexisting ion amount is written into the second binding segment, and so on until the last binding segment. After obtaining the binding sequence of the entire segment, the target ions in the target ion generation layer of the eight binding segments are bound to the corresponding collection interface, and the amount of unbound target ions, target ion complex residue amount, unresolved complex component amount, and coexisting ion amount are all merged into the main liquid flow outlet end, resulting in a collection interface loaded with target ions and a separation mother liquor.

[0089] S5. Contact the collection interface loaded with target ions with the eluent or conversion solution so that the target ions detach from the collection interface and enter the recovery solution or are converted into the recovery solid phase, thereby obtaining the target ion recovery solution or the target ion recovery product.

[0090] In this embodiment, S5 is used to transfer the target ions on the collection interface loaded with target ions from the collection interface and form a directly collectable recovery result according to the liquid phase recovery path or solid phase recovery path. This process is based on the processing cycle end record set written after the end of the previous processing cycle. First, a segmented processing sequence and corresponding inflow rate are established according to the target ion loading of each binding segment. Then, the eluent or conversion solution is introduced into each binding segment in this sequence, so that the target ions leave the collection interface in the corresponding binding segment and form the recovery flow of each binding segment. Finally, the target ion recovery solution is extracted and collected in the order of introduction to obtain the target ion recovery solution, or the solid phase generated in each binding segment is extracted and collected in sequence to obtain the target ion recovery product.

[0091] The implementation process includes the following steps:

[0092] In S5-1, the target ion loading of each binding segment and the corresponding processing order are first determined so that the subsequently introduced eluent or conversion solution corresponds to the actual loading state of each binding segment. The input quantities are the processing cycle end record set written in S4, the initial site quantity of each binding segment, the amount of target ions already bound in each binding segment, the unit processing volume parameter of the eluent or conversion solution, and the processing mode selection signal. During processing, the amount of target ions already bound recorded at the end of the current processing cycle is read for each binding segment, and this amount of target ions already bound is directly determined as the target ion loading of that binding segment. When the collection interface completes a full elution or full conversion, the amount of target ions already bound in each binding segment is reset to 0, and the accumulation is restarted in the next processing cycle. Then, the binding segments are arranged from largest to smallest according to their target ion loading to obtain the inlet order. When the target ion loading of two binding segments is the same, the binding segment that is earlier in the main liquid flow direction is prioritized.

[0093] When determining the injection rate, if the processing mode selection signal corresponds to the eluent processing mode, the target ion loading of each binding segment is divided by the unit processing volume parameter of the eluent to obtain the eluent injection rate for the corresponding binding segment. If the processing mode selection signal corresponds to the conversion liquid processing mode, the target ion loading of each binding segment is divided by the unit processing volume parameter of the conversion liquid to obtain the conversion liquid injection rate for the corresponding binding segment. The unit processing volume parameter is given by a preset configuration and represents the amount of target ions that can be carried out per unit volume of eluent, or the amount of target ions that can be converted per unit volume of conversion liquid. After sorting and calculation, the target ion loading, injection order, injection rate, and processing mode of each binding segment are written into the segment sequence processing set for S5-2 to read.

[0094] When the record of the amount of target ions bound to any binding segment is missing, the valid record value of the binding segment after the end of the previous processing cycle is read and written. When there is no valid historical record for the binding segment, the target ion load is written into the segment sequence processing set as the result of subtracting the current interface vacancy amount from the initial site amount of the binding segment.

[0095] In S5-2, the eluent or conversion solution is introduced segment by segment according to the segment processing set, so that the target ions detach from the collection interface within the corresponding binding segment and form an exportable recovery stream. The input quantities are the segment processing set written in S5-1, the structural position data of each binding segment, and the connectivity status of the export channels of each binding segment. During processing, according to the order of introduction recorded in the segment processing set, starting from the binding segment with the highest position, the corresponding volume of eluent or conversion solution is introduced into that binding segment, ensuring that the introduced liquid only contacts the collection interface of that binding segment. When the processing mode is the eluent processing mode, the elution... After the liquid comes into contact with the collection interface of the binding segment, the target ions on the binding segment detach from the collection interface and enter the liquid phase, resulting in the binding segment recovery stream. When the processing mode is the conversion liquid processing mode, after the conversion liquid comes into contact with the collection interface of the binding segment, the target ions on the binding segment undergo a conversion reaction with the conversion liquid to generate a solid phase. At the same time, the liquid phase outflow within the binding segment is retained. The liquid phase outflow and the generated solid phase are collectively referred to as the binding segment recovery stream. The liquid phase outflow contains the remaining amount of conversion liquid that did not participate in the conversion and the residual liquid after the reaction. The generated solid phase is retained at the solid phase collection position of the binding segment.

[0096] After a binding segment is processed, the target ion removal amount, liquid phase output amount, solid phase generation amount, and processing end time of that binding segment are written into the binding segment recovery record set. Then, the next binding segment is processed in the next order of the segment sequence processing set. If the output channel flow rate of any binding segment is lower than the rated flow rate of the output channel after the introduction of eluent or conversion solution, the output channel of that binding segment is checked for liquid flow and the blockage is cleared before the corresponding liquid is reintroduced. If no solid phase generation is detected in any binding segment under conversion solution processing mode, the binding segment is reintroduced with the conversion solution flow rate once and processed again, and the results of the second processing overwrite the original record value.

[0097] In S5-3, the recovered streams formed by each binding segment are first exported and collected in a predetermined order to maintain the segment source relationship corresponding to the segment sequence processing set. The input quantities are the binding segment recovery record set, segment sequence processing set, and processing mode selection signal written in S5-2. During processing, when the processing mode selection signal corresponds to the eluent processing mode, the export channels of the corresponding binding segments are opened in sequence according to the entry order recorded in the segment sequence processing set. The recovered streams of each binding segment are exported to the total recovery channel in the same order and collected at the end of the total recovery channel as the target ion recovery liquid. The export order of each binding segment recovery stream is consistent with the import order to ensure that the high-load recovery liquid of the previous processed binding segment enters the total recovery channel first.

[0098] When the processing mode selection signal corresponds to the conversion liquid processing mode, the liquid phase outflow of each binding segment is first exported in the order of entry recorded in the segment sequence processing set. Then, the solid phase collection position of each binding segment is opened in sequence. The solid phase generated by each binding segment is taken out in the same order and collected into the target ion recovery product. The solid phase removal method includes flushing removal, scraping removal or shaking removal. The specific removal method is given by the preset configuration.

[0099] After completing the export and collection, the collection volume of the target ion recovery liquid, the amount of liquid phase exported from each binding segment, the collection mass of the target ion recovery product, and the amount of solid phase removed from each binding segment are written into the recovery end record set for the next processing cycle to read. When the export order of any binding segment recovery stream is inconsistent with the segment sequence processing set, the export order is rearranged according to the order recorded in the segment sequence processing set before collection. When the solid phase generated by any binding segment cannot be completely removed at once, the amount of residual solid phase in that binding segment is recorded, and that binding segment is given priority for replenishment during the next solid phase removal.

[0100] Through the above process, S5 concretizes the processing actions of transferring the collection interface of the loaded target ions to the recovery stage into load measurement, introduction sequence determination, introduction volume calculation, segmented introduction, segmented export, and liquid phase collection or solid phase collection, so that the processing sequence, introduction volume, and export result of each binding segment correspond to the target ion loading state. Among them, the target ion loading is taken as the amount of target ions currently bound in each binding segment, and the introduction volume of the eluent or conversion liquid is obtained by converting the target ion loading and unit processing volume parameters. The recovery flow of each binding segment corresponds to the liquid phase export flow in the eluent treatment mode, and corresponds to the combination result of the liquid phase export flow and the solid phase generated in the binding segment in the conversion liquid treatment mode. Thus, the recovery liquid path and the recovery product path have clear material diameter and operation connection relationship.

[0101] In practical applications: After the eight binding segments complete the binding of target ions, the amount of target ions bound to each of the eight binding segments is first read and used as the target ion loading of each segment. Then, the order in which the eight binding segments are introduced is determined according to the target ion loading from largest to smallest. If the eluent treatment mode is used, the eluent flow rate for each of the eight binding segments is calculated by dividing the target ion loading of each binding segment by the eluent unit throughput parameter. The eluent is then introduced into the eight binding segments sequentially, allowing the target ions on each segment to detach from the collection interface and enter the liquid phase. Subsequently, the recovery streams of the eight binding segments are exported sequentially according to the import order and collected as the target ion recovery liquid. If the conversion liquid treatment mode is used, the conversion liquid flow rate for each of the eight binding segments is calculated by dividing the target ion loading of each binding segment by the conversion liquid unit throughput parameter. The conversion liquid is then introduced into the eight binding segments sequentially, allowing the target ions on each segment to generate solid phases. Finally, the liquid phase export streams are exported sequentially according to the import order, and the solid phases generated by each binding segment are extracted sequentially and collected as the target ion recovery product.

[0102] Example 2

[0103] Reference Figure 2 This embodiment provides a targeted separation and recovery system for target ions in a complex liquid phase, the system comprising:

[0104] The flow guiding module is used to acquire the liquid to be treated containing the target ion complex, coexisting ions and complexing agent, and to introduce the liquid to be treated into the main flow channel through the main inlet of the separation channel to form a main liquid flow that passes unidirectionally along the collection interface;

[0105] The decomposition module is used to introduce the decomposition liquid from the adjacent inlet of the separation channel into the adjacent flow channel adjacent to the collection interface, so that the decomposition liquid flows in the same direction and parallel to the main liquid flow along the collection interface, forming an adjacent decomposition liquid layer adjacent to the main liquid flow.

[0106] The migration and decomplexing module is used to control the component exchange between the adjacent decomplexing liquid layer and the main liquid flow to occur only at the interface between the two liquid layers, so that the target ion complex completes decomplexing and generates the target ion when migrating from the main liquid flow to the adjacent decomplexing liquid layer, and a target ion generation layer adjacent to the collection interface is obtained.

[0107] The interface bonding module is used to enable the target ions in the target ion generation layer to directly bond with the collection interface after generation, and to export the target ion complexes, uncomplexed components and coexisting ions that have not migrated into the target ion generation layer from the separation channel along with the bulk liquid flow, so as to obtain the collection interface loaded with target ions and the separation mother liquor.

[0108] The recovery module is used to bring the collection interface loaded with target ions into contact with the eluent or conversion solution, so that the target ions detach from the collection interface and enter the recovery solution or are converted into the recovery solid phase, thereby obtaining the target ion recovery solution or the target ion recovery product.

[0109] Working principle: This scheme first disperses the liquid to be treated containing the target ion complex into the main flow channel, forming a main liquid flow that passes unidirectionally along the collection interface. Then, the decomplexing liquid is dispersed into the adjacent flow channel near the collection interface, forming an adjacent decomplexing liquid layer that flows in the same direction as the main liquid flow. Subsequently, the interface between the main liquid flow and the adjacent decomplexing liquid layer is divided into multiple exchange positions according to the flow direction. The migration, decomplexing, and residual amounts of the target ion complex are calculated segment by segment, so that the target ion complex is not released all at once in the entire liquid, but migrates, decomplexes, and generates target ions segment by segment in the region close to the collection interface. The generated target ions continue to combine segment by segment along the collection interface. Uncombined target ions, undecomplexed components, residual target ion complexes, and coexisting ions are discharged with the main liquid flow to form a separation mother liquor. Finally, according to the loading of each binding position, the eluent or conversion liquid is introduced segment by segment to transfer the target ions from the collection interface, resulting in a target ion recovery liquid or target ion recovery product.

[0110] For example, in the treatment of electroplating complex waste liquid, the target metal ions in the waste liquid are often bound by the complexing agent, and are also mixed with other metal ions and background salts. If the complex is directly disintegrated in the main liquid, the target metal ions and impurities will be released at the same time and enter the subsequent separation process together, making it difficult to control the recovery purity. In this scheme, the electroplating complex waste liquid flows continuously in the main flow channel, while the disintegrating liquid flows alongside the collection interface. The target metal complex only gradually migrates into the disintegrating liquid layer and completes disintegration at the junction of the two liquids. The newly generated target metal ions are immediately combined by the collection interface nearby, thereby compressing the disintegration position and the collection position into the same adjacent area, avoiding the target metal ions from redispersing in the large volume of waste liquid or migrating synchronously with impurities. Subsequently, the target metal on the collection interface is eluted or transformed in segments to obtain a recoverable liquid or solid product that is easy to reuse.

[0111] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for the targeted separation and recovery of target ions in a complex liquid phase, characterized in that, Includes the following steps: S1. Obtain the liquid to be treated containing the target ion complex, coexisting ions and complexing agent, and introduce the liquid to be treated into the main flow channel through the main inlet of the separation channel to form a main liquid flow that passes through the collection interface in one direction. S2. The decomposition liquid is introduced into the adjacent flow channel of the collection interface through the adjacent inlet of the separation channel, so that the decomposition liquid flows in the same direction and parallel to the main liquid flow along the collection interface, forming an adjacent decomposition liquid layer adjacent to the main liquid flow. S3. Control the component exchange between the adjacent decomplexing liquid layer and the main liquid flow only at the interface between the two liquid layers, so that the target ion complex completes decomplexing and generates the target ion when it migrates from the main liquid flow to the adjacent decomplexing liquid layer, and obtains the target ion generation layer adjacent to the collection interface. S4. After the target ions in the target ion generation layer are generated, they directly combine with the collection interface, and the target ion complexes that have not migrated into the target ion generation layer, the uncomplexed components and coexisting ions are exported from the separation channel with the bulk liquid flow, so as to obtain the collection interface loaded with target ions and the separation mother liquor. S5. Contact the collection interface loaded with target ions with the eluent or conversion solution so that the target ions detach from the collection interface and enter the recovery solution or are converted into the recovery solid phase, thereby obtaining the target ion recovery solution or the target ion recovery product.

2. The method for targeted separation and recovery of target ions in a complex liquid phase according to claim 1, characterized in that: S1 includes the following steps: S1-1. Measure the flow path length from each liquid inlet set along the extension direction of the main inlet to the inlet of the main flow channel confluence section, and determine the liquid flow cross-sectional area of ​​each liquid inlet according to the inverse ratio of each flow path length to obtain the liquid inlet group. S1-2. The liquid to be treated is introduced into each inlet, and the liquid to be treated output from each inlet enters the main flow channel through the corresponding guide channel to obtain multiple parallel liquid flows. S1-3. Multiple parallel liquid streams are spread out and merged at the inlet of the confluence section along the direction of the collection interface to obtain the main liquid stream that passes through the collection interface in one direction.

3. The method for targeted separation and recovery of target ions in a complex liquid phase according to claim 1, characterized in that: S2 includes the following steps: S2-1. Measure the flow path length from each branch inlet set along the extension direction of the collection interface to the inlet of the confluence section of the adjacent flow channel, and determine the liquid-passing cross-sectional area of ​​each branch inlet according to the inverse ratio of each flow path length to obtain the branch inlet group. S2-2. The anti-complexing fluid is introduced into each branch inlet, and the anti-complexing fluid output from each branch inlet is allowed to enter the adjacent flow channel through the corresponding boundary guide slot, resulting in multiple parallel anti-complexing fluid flows. S2-3. Multiple parallel decomposition fluid flows are spread out and merged at the inlet of the confluence section along the extension direction of the collection interface to obtain a neighboring decomposition fluid layer that flows in the same direction as the main fluid flow along the collection interface.

4. The method for targeted separation and recovery of target ions in a complex liquid phase according to claim 1, characterized in that: S3 includes the following steps: S3-1. Divide the boundary between the adjacent decomplexing liquid layer and the main liquid flow into multiple sequentially connected exchange sections along the main liquid flow direction. Collect the target ion complex concentration, decomplexing component concentration, main liquid flow rate and adjacent decomplexing liquid layer flow rate at the inlet of each exchange section. Perform median filtering and adjacent difference operation on the continuous collected values ​​of the same exchange section in time order. Calculate the residence time, concentration gradient and input quantity of each exchange section based on the filtered concentration value, flow rate value and exchange section length to obtain the exchange section state set. S3-2. Using the target ion complex input, uncomplexing component input, residence time and concentration gradient of each exchange segment as input, and according to the constraints that the reduction of the target ion complex is equal to the component exchange amount, the reduction of the uncomplexing component is equal to the uncomplexing amount, the generation of the target ion is equal to the uncomplexing amount, and the output of each exchange segment is not greater than the corresponding input amount, a joint solution sequence of component exchange amount, uncomplexing amount and residual amount of each exchange segment is established. Then, the segment-by-segment iterative update is performed according to the weighted sum of the exchange residual, uncomplexing residual and inter-segment residual connection residual. After each update, the negative value is reset to zero and the value exceeding the corresponding input amount is reset to the corresponding input amount, thus obtaining the forward uncomplexing sequence. S3-3. Write the residual amount of the previous exchange segment in the forward uncomplexing sequence into the input amount of the next exchange segment. Perform forward recursive recalculation on all exchange segments. Then, starting from the target ion generation amount, uncomplexing component residual amount, and target ion complex residual amount of the last exchange segment, perform reverse back substitution recalculation. Then, merge and update the forward recursive recalculation result and the reverse back substitution recalculation result of the same exchange segment according to the weights after normalizing the reciprocal of their respective residuals. Repeat the forward recursive recalculation, reverse back substitution recalculation, and fusion update until the component exchange amount, uncomplexing amount, and residual amount of each exchange segment are consistent in two adjacent updates after rounding according to the smallest unit of measurement corresponding to the acquisition resolution, thus obtaining a converged exchange sequence. S3-4. According to the convergent exchange sequence, the target ion complex in the main liquid flow is controlled to migrate into the adjacent uncomplexing liquid layer segment by segment through each exchange segment and complete the uncomplexing segment by segment. The target ion generating liquid layers adjacent to the collection interface of each exchange segment are sequentially connected along the flow direction of the main liquid flow to obtain the target ion generating layer adjacent to the collection interface.

5. The method for targeted separation and recovery of target ions in a complex liquid phase according to claim 1, characterized in that: S4 includes the following steps: S4-1. Divide the collection interface into multiple sequentially connected segments along the main liquid flow direction. Measure the target ion generation, target ion complex residue, unresolved complex component, coexisting ion quantity, and interface vacancy quantity at the inlet of each segment to obtain the segment input set. S4-2. Perform binding amount determination operation on each binding segment. When the target ion generation amount is not higher than the interface vacancy amount, the target ion binding amount is determined as the target ion generation amount. When the target ion generation amount is higher than the interface vacancy amount, the target ion binding amount is determined as the interface vacancy amount. The result of subtracting the target ion binding amount from the interface vacancy amount is determined as the remaining vacancy amount, thus obtaining the forward binding sequence. S4-3. Subtract the target ion binding amount from the target ion generation amount in each binding segment, the residual amount of the target ion complex, the amount of unresolved complex components, and the amount of coexisting ions are written into the input of the next binding segment. The binding amount determination operation is repeated for the next binding segment until the last binding segment is reached to obtain the complete binding sequence. S4-4. According to the full-segment binding sequence, the target ions in the target ion generation layer of each binding segment are bound to the collection interface segment by segment. Unbound target ions, target ion complexes that have not migrated into the target ion generation layer, uncomplexed components and coexisting ions are merged into the main liquid flow and discharged out of the separation channel to obtain the collection interface loaded with target ions and the separation mother liquor.

6. The method for targeted separation and recovery of target ions in a complex liquid phase according to claim 1, characterized in that: S5 includes the following steps: S5-1. Measure the target ion loading of each binding segment on the collection interface loaded with target ions, and determine the amount and order of eluent or conversion solution introduced into each binding segment according to the target ion loading of each binding segment to obtain the segment sequence processing set. S5-2. According to the segment processing set, the eluent or conversion solution is sequentially introduced into each binding segment, and the eluent or conversion solution in each binding segment is brought into contact with the collection interface of the corresponding binding segment, so that the target ions on the binding segment leave the collection interface and enter the liquid phase or react with the conversion solution to generate a solid phase, thus obtaining the recovery stream of each binding segment. S5-3. The recovery streams from each binding segment are sequentially discharged and collected into the target ion recovery liquid in the order of introduction, or the solid phases generated from each binding segment are sequentially collected and collected into the target ion recovery product.

7. A targeted separation and recovery system for target ions in a complex liquid phase, characterized in that, The targeted separation and recycling system includes: The flow guiding module is used to acquire the liquid to be treated containing the target ion complex, coexisting ions and complexing agent, and to introduce the liquid to be treated into the main flow channel through the main inlet of the separation channel to form a main liquid flow that passes unidirectionally along the collection interface; The decomposition module is used to introduce the decomposition liquid from the adjacent inlet of the separation channel into the adjacent flow channel adjacent to the collection interface, so that the decomposition liquid flows in the same direction and parallel to the main liquid flow along the collection interface, forming an adjacent decomposition liquid layer adjacent to the main liquid flow. The migration and decomplexing module is used to control the component exchange between the adjacent decomplexing liquid layer and the main liquid flow to occur only at the interface between the two liquid layers, so that the target ion complex completes decomplexing and generates the target ion when migrating from the main liquid flow to the adjacent decomplexing liquid layer, and a target ion generation layer adjacent to the collection interface is obtained. The interface bonding module is used to enable the target ions in the target ion generation layer to directly bond with the collection interface after generation, and to export the target ion complexes, uncomplexed components and coexisting ions that have not migrated into the target ion generation layer from the separation channel along with the bulk liquid flow, so as to obtain the collection interface loaded with target ions and the separation mother liquor. The recovery module is used to bring the collection interface loaded with target ions into contact with the eluent or conversion solution, so that the target ions detach from the collection interface and enter the recovery solution or are converted into the recovery solid phase, thereby obtaining the target ion recovery solution or the target ion recovery product.

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