Continuous ion exchange system based on multistage dynamic switching and intelligent feedback control

Abstract

The utility model discloses a continuous ion exchange system based on multi-stage dynamic switching and intelligent feedback control, which is characterized in that a liquid inlet control device is arranged on a main liquid inlet pipe of each process position and is used for acquiring liquid inlet pressure and flow velocity in real time; an ultrasonic distance sensor is arranged at the upper end part of each resin column and is used for immediately detecting the height of resin in the resin column; a multi-dimensional data acquisition device is arranged on a liquid outlet pipe of each resin column and is used for acquiring the solid content, the ion concentration and the pH value of discharged liquid in real time; after the collected data is efficiently analyzed by the control system, the indexes of liquid inlet and liquid outlet of the ion exchange system can be monitored, and dynamic switching can be carried out in time. According to the scheme, the stability of the whole ion exchange system can be improved by monitoring the feed liquid in each stage in real time, manual intervention caused by sudden feed concentration change is reduced, the working efficiency is greatly improved, and meanwhile, the expenditure cost of a large amount of manpower and material resources is saved.

Description

Continuous Interchange System Based on Multi-Level Dynamic Switching and Intelligent Feedback Control Technical Field

[0001] This utility model relates to the field of ion exchange technology, specifically to a continuous ion exchange system based on multi-level dynamic switching and intelligent feedback control. Background Technology

[0002] Existing continuous decoupling systems mostly adopt time / flow-triggered switching logic. This switching logic mainly determines when to switch resin columns by monitoring the system's running time or the flow rate being processed, in order to ensure the normal operation of the system.

[0003] However, using this switching logic often leads to delays or premature changes, resulting in the loss or waste of target components. For example, in the production unit, when the concentration of the feed product is greater than or less than the experimentally stable value, a fixed-time switching cycle can cause the resin column to saturate prematurely or delayedly, resulting in the loss of target components or resin waste. In the top-feeding unit, due to the differences in the resin bed between each column, the water consumption of each column varies, and using this switching logic can easily lead to water waste. In the backwashing unit, if the resin bulkiness has reached the required level, continuing backwashing will increase the backwash water volume, resulting in waste. In the regeneration unit, due to the variability of the feed, a fixed regeneration volume will directly affect the regeneration effect. In the rinsing unit, delayed column cutting will cause water waste, while premature column cutting will affect the subsequent use of resin in the column and affect production efficiency. Summary of the Invention

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a continuous switching system based on multi-level dynamic switching and intelligent feedback control.

[0005] According to the technical solution provided in the embodiments of this application, the continuous separation and exchange system based on multi-level dynamic switching and intelligent feedback control includes several resin columns arranged from left to right in the process position. The process position of the several resin columns includes a top material unit, a production unit, a rinsing unit, a regeneration unit, and a backwashing unit. The resin columns are cyclically switched in each cycle.

[0006] Each process station's main inlet pipe is equipped with an inlet control device to collect inlet pressure and flow rate in real time; each resin column at each process station is equipped with an ultrasonic distance sensor at its upper end to detect the resin height inside the resin column in real time; each resin column's outlet pipe at each process station is equipped with a multi-dimensional data acquisition device to collect the solid content, ion concentration, and pH value of the effluent in real time; after the collected data is efficiently analyzed by the control system, it is possible to monitor the inlet and outlet indicators of the ion exchange system and make timely dynamic switching.

[0007] Furthermore, the liquid inlet control device includes a housing and a liquid inlet pipe. The liquid inlet pipe is fixedly passed through the housing. A proportional regulating valve, a flow meter, and a pressure sensor are sequentially installed on the liquid inlet pipe inside the housing. A display screen is installed on the housing.

[0008] Furthermore, the multidimensional data acquisition device includes an acquisition box, inside which are fixed four-way valves A and B. One pipe of four-way valve A and one pipe of four-way valve B are fixedly passed through the end face of the acquisition box. The other three pipes of four-way valve A are respectively connected to the other three pipes of four-way valve B. An online refractometer, an online ion detector, and an online pH detector are respectively installed on the three pipes connected to four-way valve A and four-way valve B. A display screen is provided on the end face of the acquisition box.

[0009] In summary, the beneficial effects of this application are as follows: This solution has the following advantages:

[0010] 1. This solution sets up a liquid inlet control device on the main liquid inlet pipe of each process station of the ion exchange system to adjust various liquid inlet parameters in real time; sets up an ultrasonic distance sensor on the resin column to monitor the degree of resin fluffiness in the resin column in real time; and sets up a multi-dimensional data acquisition device on the liquid outlet pipe of the resin column to monitor various liquid outlet parameters in real time, so as to realize real-time monitoring of the liquid in each stage of the ion exchange system.

[0011] 2. This solution achieves timely switching of cycles in the ion-exchange system through real-time monitoring of the output at each stage. It also solves problems such as resource waste or oversaturation of the feed solution caused by traditional time / flow switching logic. For example, in the production unit, it can monitor changes in ion concentration in the feed solution in real time, adjusting the resin column switching accordingly to prevent excessively high ion concentration in the output solution due to resin oversaturation, which would affect production quality. In the regeneration unit, it can monitor the pH value of the regenerated output solution in real time, adjusting the acid / alkali dosage accordingly to prevent insufficient or excessive dosage from affecting resin regeneration or wasting resources.

[0012] 3. This solution improves the stability of the entire ion exchange system by real-time monitoring of the feed liquid at each stage, and also reduces manual intervention due to sudden changes in feed concentration, greatly improving work efficiency and saving a lot of manpower and material costs. Attached Figure Description

[0013] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0014] Figure 1 is a schematic diagram of the entire separation and intersection system of this scheme;

[0015] Figure 2 is a schematic diagram of the structure of a single resin column in this scheme;

[0016] Figure 3 is a cross-sectional structural schematic diagram of the liquid inlet control device of this scheme;

[0017] Figure 4 is a cross-sectional front view of the multidimensional data acquisition of this scheme.

[0018] The following labels are used in the diagram: Resin column-A; Liquid inlet control device-1; Box-1.1; Liquid inlet pipe-1.2; Ultrasonic distance sensor-2; Multidimensional data acquisition device-3; Acquisition box-3.1; Four-way valve A-3.2; Four-way valve B-3.3; Proportional regulating valve-4; Flow meter-5; Pressure sensor-6; Online refractometer-7; Online ion detector-8; Online pH meter-9. Detailed Implementation

[0019] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0020] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0021] As shown in Figure 1, the entire ion exchange system is a system in which multiple resin columns A are connected by a valve array. The entire ion exchange system is divided into a top feeding unit, a production unit, a rinsing unit, a regeneration unit, and a backwashing unit.

[0022] 1-1 indicates that the top material unit has one resin column;

[0023] 2-1, 2-2...2-I indicate that the first production unit has I resin columns;

[0024] 3-1, 3-2...3-I indicate that the second production unit has I resin columns;

[0025] N-1, N-2...NI indicates that the (N-1)th production unit has I resin columns;

[0026] 4-1, 4-2...4-C indicate that the rinsing unit has C resin columns;

[0027] 5-1, 5-2...5-E indicates that the regeneration unit has E resin columns;

[0028] 6-1 indicates that the backwash unit has one resin column;

[0029] The periodic switching of an ion exchange system usually refers to the periodic switching of the system's operating state during the ion exchange process in order to optimize the treatment effect and resource utilization.

[0030] As shown in Figure 1, a liquid inlet control device 1 is provided on the main liquid inlet pipe of each process station in the whole system, and a multi-dimensional data acquisition device 3 is provided on the liquid outlet pipe of each resin column A.

[0031] The production unit includes the first production unit, the second production unit, and so on up to the (N-1)th production unit. The first production unit 2-1, the second production unit 3-1, ... the (N-1)th production unit (N-1)-1 connected in parallel are connected in series with the first production unit 2-2, the second production unit 3-2, ... the (N-1)th production unit (N-1)-2 connected in parallel, and so on, with N being greater than or equal to 2.

[0032] The rinsing unit consists of C resin columns connected end to end;

[0033] The regeneration unit consists of E resin columns connected end to end;

[0034] As shown in Figure 2, an ultrasonic distance sensor 2 is fixedly installed above the resin column A, and a display screen is installed on the multidimensional data acquisition device 3.

[0035] As shown in Figure 3, the front end of the housing 1.1 of the liquid inlet control device 1 is equipped with a display screen (which has been cut off and is not shown). Inside the housing 1.1, there is a liquid inlet pipe 1.2 that runs through both ends of the housing 1.1. On the liquid inlet pipe 1.2, from the liquid inlet to the liquid outlet direction, there are a proportional regulating valve 4, a flow meter 5 and a pressure sensor 6 in sequence.

[0036] As shown in Figure 4, a four-way valve A3.2 and a four-way valve B3.3 are fixedly installed inside the collection box 3.1. One pipe of the four-way valve A3.2 passes through one end face of the collection box 3.1, and one pipe of the four-way valve B3.3 passes through the other end face of the collection box 3.1. The other three pipes of the four-way valve A3.2 and the four-way valve B3.3 are connected respectively, and an online refractometer 7, an online ion detector 8, and an online pH detector 9 are respectively installed on the three connected pipes.

[0037] Furthermore, the proportional control valve 4, flow meter 5, pressure sensor 6, four-way valve A3.2, four-way valve B3.3, online refractometer 7, online ion detector 8, and online pH detector 9 are all connected to the control system.

[0038] When the separation system is working, it is as shown in Figure 1.

[0039] When the top feeding unit is working, first set the inlet flow rate (e.g., 1 bv / h) and the outlet concentration (e.g., 0.5%). Then, water is supplied to the top feeding unit through the control system. At this time, the proportional regulating valve 4 in the inlet control device 1 will automatically adjust the valve opening according to the flow rate monitored and displayed by the flow meter 5; at the same time, through the opening and closing of the four-way valves A-3.2 and B-3.3 on the multi-dimensional data acquisition device 3, the outlet liquid passes through the pipeline of the online refractometer 7 to monitor the concentration of the outlet liquid in real time. When the outlet liquid concentration reaches the set index, the water supply is stopped, and the operation of the top feeding unit ends.

[0040] Similarly, as shown in Figure 1, when the production unit is working, the flow rate of the feed liquid entering the unit (e.g., 4 bv / h) and the ion concentration of each resin column output (e.g., 500 ppm, 400 ppm, etc.) need to be set through the control system. Then, the feed liquid is introduced into the production unit. At this time, the proportional regulating valve 4 automatically adjusts the size of the feed main switch valve. The output liquid is monitored in real time through the pipelines of the four-way valve A3.2 and the four-way valve B3.3, which are equipped with online ion detectors 8. When the output liquid concentration reaches the set index, it is considered that the resin in the resin column is saturated and the resin column needs to be switched. The production unit work in this cycle ends.

[0041] As shown in Figure 1, "flow velocity into the unit" refers to the flow velocity on the main inlet pipe when the first production unit 2-1, the second production unit 3-1, ... the N-1th production unit (N-1)-1 are connected in parallel. The first production unit 2-1, the second production unit 3-1, ... the N-1th production unit (N-1)-1 are connected in series with the first production unit 2-2, the second production unit 3-2, ... the N-1th production unit (N-1)-2. However, at this time, no inlet control device 1 is installed on the main inlet pipe of the first production unit 2-2, the second production unit 3-2, ... the N-1th production unit (N-1)-2. The same applies to the subsequent units.

[0042] As shown in Figure 1, when the rinsing unit is working, the inlet water flow rate (e.g., 5 bv / h) and the outlet pH (e.g., pH = 4) are set first. Similarly, after water is introduced, the proportional regulating valve 4 adjusts the flow rate; the outlet liquid passes through a pipeline equipped with an online pH meter 9, and when the outlet liquid detection value reaches the set standard, it indicates that the rinsing unit has finished working.

[0043] As shown in Figure 1, when the regeneration unit is working, a suitable regeneration solution—acid or alkali—is introduced according to the type of resin filled in resin column A—either a cathodic or anion exchange resin column. Similarly, the inlet flow rate (e.g., 2 bv / h) and outlet pH (e.g., pH = 3.5) are set first. After the feed solution is introduced, the proportional control valve 4 automatically adjusts the valve opening to regulate the flow rate of the regeneration solution. The outlet solution passes through the pipes of the four-way valve A3.2 and four-way valve B3.3, which are equipped with an online pH meter 9. When the outlet pH reaches the set value, it indicates that the resin regeneration in resin column A is complete.

[0044] As shown in Figure 1, when the backwashing unit is working, water is passed from the bottom of resin column A into resin column A to backwash resin column A. The height of the resin in resin column A is detected by ultrasonic distance sensor 2. When the height of the resin reaches a certain proportion X of the total height of resin column A (such as 80%), it is considered that the backwashing effect has been achieved, indicating that the backwashing work is over. In practical applications, the distance of ultrasonic distance sensor 2 is set to (1-X)H (such as 20%H), where H is the total height of resin column A. When the distance reaches the set value, the backwashing work is completed.

[0045] In this design, if a distributor is located directly below the inlet of resin column A, the ultrasonic distance sensor 2 can be positioned below the distributor; alternatively, it can be tilted and positioned on the side of the column, with the set value obtained through conventional calculations. In short, it is only necessary to ensure that the ultrasonic distance sensor 2 can measure the resin height within resin column A.

[0046] In this design, the main function of the pressure sensor is to determine the rationality of the flow rate setting in order to protect the resin. When the pressure sensor detects that the feed pressure is too high, it means that the flow rate is too fast, the resin is under too much pressure, and it is prone to breakage. The feed flow rate needs to be reset to maintain system stability and improve resin utilization; conversely, the same applies.

[0047] The above description is merely a preferred embodiment of this application and an explanation of the technical principles and other solutions employed. Furthermore, the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A continuous alternating current system based on multi-level dynamic switching and intelligent feedback control, comprising several resin columns arranged from left to right at process positions, wherein the process positions of the resin columns include a top-feed unit, a production unit, a rinsing unit, a regeneration unit, and a backwashing unit, and the resin columns are sequentially switched in each cycle; characterized in that: Each process station has a main inlet pipe equipped with an inlet control device (1) to collect inlet pressure and flow rate in real time; each resin column at each process station is equipped with an ultrasonic distance sensor (2) at the upper end to detect the resin height in the resin column in real time; each resin column at each process station has an outlet pipe equipped with a multi-dimensional data acquisition device (3) to collect the solid content, ion concentration and pH value of the outlet liquid in real time; after the collected data is efficiently analyzed by the control system, the inlet and outlet indicators of the ion exchange system can be monitored and dynamically switched in a timely manner.

2. The continuous switching system based on multi-level dynamic switching and intelligent feedback control according to claim 1, characterized in that: The liquid inlet control device (1) includes a housing (1.1) and a liquid inlet pipe (1.2). The liquid inlet pipe (1.2) is fixedly inserted through the housing (1.1). A proportional regulating valve (4), a flow meter (5) and a pressure sensor (6) are sequentially installed on the liquid inlet pipe (1.2) inside the housing (1.1).

3. The continuous switching system based on multi-level dynamic switching and intelligent feedback control according to claim 2, characterized in that: The housing (1.1) is equipped with a display screen.

4. The continuous switching system based on multi-level dynamic switching and intelligent feedback control according to claim 1, characterized in that: The multidimensional data acquisition device (3) includes an acquisition box (3.1). A four-way valve A (3.2) and a four-way valve B (3.3) are fixedly installed inside the acquisition box (3.1). One channel of the four-way valve A (3.2) and one channel of the four-way valve B (3.3) are respectively fixedly passed through the end face of the acquisition box (3.1). The other three pipes of the four-way valve A (3.2) are respectively connected to the other three pipes of the four-way valve B (3.3). An online refractometer (7), an online ion detector (8), and an online pH detector (9) are respectively installed on the three pipes connecting the four-way valve A (3.2) and the four-way valve B (3.3).

5. The continuous switching system based on multi-level dynamic switching and intelligent feedback control according to claim 4, characterized in that: The end face of the acquisition box (3.1) is equipped with a display screen.

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