Electro-regeneration polishing mixed bed for preparing ultrapure water

Abstract

The invention discloses an electric regeneration polishing mixed bed for preparing ultrapure water, the electric regeneration polishing mixed bed comprises a polishing mixed bed body, an electric regeneration unit and a monitoring system are integrated in the polishing mixed bed body, the electric regeneration unit comprises an electrode and an ion exchange membrane, and an adsorption-regeneration closed loop system is formed; a multi-parameter on-line sensor is integrated in the monitoring system, so that the quality of effluent is monitored in real time, and the resin adsorption saturation is dynamically judged. Compared with the prior art, the electro-regeneration polishing mixed bed for preparing the ultrapure water has the advantages that various impurities, ions and the like in water can be effectively removed, high-quality ultrapure water is provided for related industries, and the water use requirement in the production, research and development process of the ultrapure water is met.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ultrapure water preparation, in particular to an electric regeneration polishing mixed bed for preparing ultrapure water. BACKGROUND

[0002] In the process of preparing ultrapure water, the traditional polishing mixed bed relies on chemical agents (acid / base) to regenerate the resin. This method has many drawbacks, the first of which is a long regeneration cycle. The chemical agent regeneration process is complicated and needs to go through multiple steps, consuming a lot of time and affecting the efficiency of ultrapure water preparation.

[0003] Medicament residue pollution is also a pain point that cannot be ignored. Chemical agents will remain in the resin during the regeneration process, thereby contaminating the prepared ultrapure water and reducing the purity and quality of the water. At the same time, the cost of waste liquid treatment is high, and the use of chemical agents for regeneration will generate a large amount of waste liquid containing acid / base, which needs to be treated professionally, increasing the operating cost of the enterprise.

[0004] For high-precision polishing mixed beds, the problem is more prominent.

[0005] High-precision polishing mixed beds either cannot be regenerated or cannot be used for high-precision polishing after regeneration. This causes a large amount of high-value resin resources to be discarded after being used once or a few times, resulting in serious resource waste.

[0006] These problems limit the further development of traditional polishing mixed beds in the field of ultrapure water preparation, and an innovative solution is urgently needed to overcome these pain points. SUMMARY

[0007] The technical problem to be solved by the present application is to overcome the above technical defects and provide an electric regeneration polishing mixed bed for preparing ultrapure water, which can meet the needs of ultrapure water preparation and can be regenerated.

[0008] To solve the above technical problems, the technical solution provided by the present application is as follows: an electric regeneration polishing mixed bed for preparing ultrapure water, comprising a polishing mixed bed body, an electric regeneration unit and a monitoring system are integrated in the polishing mixed bed body, the electric regeneration unit comprises an electrode and an ion exchange membrane, forming an adsorption-regeneration closed loop system;

[0009] The monitoring system is integrated with a multi-parameter online sensor, which monitors the water quality in real time and dynamically judges the adsorption saturation degree of the resin.

[0010] Preferably, the electrode is a partition structure including an anode region, a cathode region and an intermediate mixing region, and the intermediate mixing region is filled with ion exchange resin;

[0011] The ion exchange membrane is provided with two groups respectively arranged between the anode region and the intermediate mixing region, and between the cathode region and the intermediate mixing region.

[0012] Preferably, the intermediate mixing zone is also provided with multiple layers of physical isolation layers, each group of physical isolation layers filled with ion exchange resins with different functions.

[0013] Preferably, the physical isolation layer is a porous partition, and the ion exchange resin includes heavy metal adsorption resin, alkali metal adsorption resin, and organic matter adsorption resin.

[0014] Preferably, the multi-parameter online sensor includes one or more of an electrical conductivity sensor, a TOC sensor, a metal ion concentration sensor, and a particle counter.

[0015] Preferably, the adsorption-regeneration closed loop system process is driven by a direct current electric field, so that the ions adsorbed in the ion exchange resin migrate directionally to the electrode zone and are discharged, while H + / OH- from the electrode zone diffuses back to the resin layer to replace the adsorption sites.

[0016] Preferably, the monitoring system is also provided with a critical value, which is determined based on the indicators of electrical conductivity, TOC, metal ion concentration, and particulate matter.

[0017] When the water quality reaches the preset critical value, the electric regeneration is automatically started.

[0018] Compared with the prior art, the present application has the advantages that: the present application is an electric regeneration polishing mixed bed for preparing ultrapure water, and the electric regeneration technology is integrated into the polishing mixed bed structure, with the goal of realizing "no chemical agents, continuous regeneration". The electric regeneration unit (electrode, ion exchange membrane) is embedded in the traditional polishing mixed bed, forming an "adsorption-regeneration" closed loop system.

[0019] The traditional polishing mixed bed relies on chemical agents to regenerate the resin, and has long regeneration cycle, agent residue pollution, and high waste liquid treatment cost. Moreover, high-precision polishing mixed beds are difficult to regenerate, and even if they are regenerated, they are difficult to restore high-precision polishing performance, resulting in a large amount of waste resin resources. At the same time, the traditional regeneration relies on manual experience for judgment, and has obvious hysteresis, which easily leads to unstable water quality, and cannot meet the needs of industries with strict water quality requirements.

[0020] The present application integrates the electric regeneration technology into the polishing mixed bed structure, with the goal of realizing "no chemical agents, continuous regeneration". The resin is regenerated by electric field, avoiding the use of chemical agents, which can solve a series of problems brought by chemical regeneration. This integrated method can establish an efficient regeneration mechanism, so that the resin can quickly restore the exchange capacity after adsorption saturation, ensuring the continuity and stability of ultrapure water preparation, reducing production cost and environmental impact.

[0021] The internal design of the mixed bed is divided into electrode structures, including anode area, cathode area and intermediate mixing area. When the resin is saturated with adsorption, ions can be directionally migrated by the electric field. + / OH- replaces the adsorbed metal / anion, so that the resin restores the exchange capacity. This design avoids the traditional chemical regeneration step, without the use of acid / alkali and other chemicals, reducing the pollution of residual chemicals and the cost of waste liquid treatment, while shortening the regeneration cycle and improving the efficiency of ultrapure water preparation.

[0022] Intelligent monitoring system is adopted, integrating multiple parameter online sensors such as conductivity, TOC, metal ion concentration, particle counter, etc. Real-time monitoring of water quality, dynamic judgment of resin adsorption saturation. When the effluent water quality reaches the critical value, the system automatically starts the electric regeneration and backwashing program. This method solves the problem of lagging behind in traditional regeneration depending on manual experience, ensuring stable effluent water quality and meeting the needs of industries with high requirements for ultrapure water quality.

[0023] The electric regeneration unit (electrode, ion exchange membrane) is embedded in the traditional polishing mixed bed, forming a "adsorption-regeneration" closed loop system. This structure allows the resin to adsorb impurities while being regenerated by the electric field, without the need to remove the resin for chemical regeneration. The figure clearly shows the spatial layout of the partition electrode and the resin layer, and intuitively presents the design principle and advantages of the integrated structure.

[0024] A physical isolation layer, such as a porous partition, is provided inside the mixed bed to fix different functional resins (heavy metal adsorption resin, alkali metal adsorption resin, organic matter adsorption resin) in layers. This structure avoids the problem of efficiency decline caused by mixing different functional resins, allowing each resin to fully exert its specific adsorption function and improving the adsorption efficiency of the resin and the quality of ultrapure water production.

[0025] Through the direct current electric field, the adsorbed ions (such as Na + , Ca 2+ ) in the resin directionally migrate to the electrode area and are discharged. At the same time, H + / OH- from the electrode area diffuses back to the resin layer, replacing the adsorption sites, achieving resin regeneration. This electric field driven resin electric regeneration method does not require chemical agents, avoiding the drawbacks of chemical regeneration, and has the characteristics of high efficiency, environmental protection and continuous regeneration, providing a new process method for ultrapure water production.

[0026] Compared with the prior art, the electric regeneration polishing mixed bed of the application has significant advantages. In terms of energy consumption, the use of advanced electrode system and regeneration technology greatly reduces the consumption of electric energy. In terms of cost, the resin can be regenerated on line, reducing the resin replacement frequency and wastewater discharge, and reducing the operating cost and environmental pressure. At the same time, the mixed bed has lower requirements for the quality of the inlet water, strong anti-pollution ability, and can effectively remove microorganisms, colloids and other impurities in the water, and the quality of the ultra-pure water prepared is higher, which can better meet the water demand of various industries. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of an electric regeneration polishing mixed bed for preparing ultra-pure water. DETAILED DESCRIPTION

[0028] The application will be further described in detail below in combination with the drawings.

[0029] In combination with the drawings, Figure 1 As shown in the drawings, an electric regeneration polishing mixed bed for preparing ultra-pure water, the electric regeneration technology is integrated into the polishing mixed bed structure, the goal is to achieve "no chemical agent, continuous regeneration". The electric regeneration unit (electrode, ion exchange membrane) is embedded in the traditional polishing mixed bed, forming a "adsorption-regeneration" closed loop system.

[0030] The mixed bed is internally designed with a partitioned electrode structure, including an anode area, a cathode area and an intermediate mixing area. When the resin is saturated with adsorption, ions can be directionally migrated through the action of an electric field. + / OH- replaces the adsorbed metal / anion, so that the resin restores the exchange capacity.

[0031] The intelligent monitoring system is used, and multiple parameter online sensors are integrated, such as conductivity, TOC, metal ion concentration, particle counter, etc. The water quality of the outlet is monitored in real time, and the saturation degree of the resin adsorption is dynamically judged. When the water quality of the outlet reaches the critical value, the system automatically starts the electric regeneration and backwashing program.

[0032] The physical isolation layer is arranged in the mixed bed, such as a porous partition, to fix different functional resins (heavy metal adsorption resin, alkali metal adsorption resin, organic matter adsorption resin) in layers.

[0033] The adsorbed ions (such as Na + , Ca 2+ ) in the resin are directionally migrated to the electrode area and discharged through the direct current electric field. At the same time, H + / OH- from the electrode area diffuses reversely to the resin layer, replaces the adsorption sites, and realizes the regeneration of the resin.

[0034] The dynamic judgment resin adsorption saturation degree is mainly based on the data monitored by each sensor in real time. The control system pre-sets the critical value of each index. When the sensor monitors that the conductivity, TOC, metal ion concentration or particle number reaches the critical value, it indicates that the resin adsorption is close to saturation. At this time, the system automatically starts the electric regeneration process, and the resin restores the exchange capacity through the electric field driving.

[0035] When embedding the electric regeneration unit into the traditional polishing mixed bed in the specific implementation of the present application, precise planning of the layout is required. First, install the electrode and ion exchange membrane and other electric regeneration unit components at a suitable position in the mixed bed to form an integrated structure. For the partition electrode structure, accurately divide the anode area, cathode area and intermediate mixing area in the mixed bed to ensure that the functions of each area are clear. The electrodes in the anode area and cathode area are installed stably and accurately in position to ensure uniform distribution of the electric field. When installing the resin layered filling structure, use a porous partition as a physical isolation layer to fill different functional resins such as heavy metal adsorption resin, alkali metal adsorption resin, organic matter adsorption resin and the like in layers to avoid mixing of the resins and fully exert the adsorption performance of each resin.

[0036] The installation position of the multi-parameter online sensor is crucial. The conductivity sensor, TOC sensor, metal ion concentration sensor and particle counter should be installed near the mixed bed outlet to monitor the outlet water quality in real time and accurately. After installation, debugging work is carried out. Calibrate each sensor to ensure the accuracy of the measurement data. Set the water quality critical value, determine the critical value of the conductivity, TOC, metal ion concentration and particle number according to the quality requirements of ultrapure water. When the monitoring data reaches the critical value, the intelligent monitoring system automatically triggers the electric regeneration and backwashing program to realize intelligent online detection and automatic control of the outlet water quality.

[0037] When driving the resin electric regeneration by the electric field, the electric field parameters need to be reasonably set. First, connect the direct current power supply, set the appropriate electric field strength and current density according to the type and adsorption of the resin. Generally, the electric field strength is controlled within a certain range to ensure that the adsorbed ions (such as Na + , Ca 2+ ) in the resin can migrate directionally to the electrode area. At the same time, adjust the action time of the electric field to make H + / OH- from the electrode area diffuse reversely to the resin layer to fully replace the adsorption sites and realize resin regeneration. In the electric regeneration process, the electric field parameters and resin regeneration conditions are monitored in real time, and fine tuning is carried out according to the actual situation to ensure that the regeneration effect is optimal.

[0038] The contents not described in detail in the present specification belong to the prior art known to those skilled in the art.

[0039] In this application, unless otherwise clearly specified and limited, the terms "mounting", "connection", "linking", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integral; can be directly connected, or indirectly connected through an intermediate medium; can be internal communication of two elements or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0040] The above describes the present application and its embodiments, which is not limited, and the drawings shown is only one of the embodiments of the present application, the actual structure is not limited. In general, if the ordinary skilled in the art is inspired, without departing from the purpose of the present application, without creative design of similar structure and examples of the technical scheme, all should belong to the protection scope of the present application.

Claims

1. An electroregenerative polishing mixed bed for preparing ultrapure water, comprising a polishing mixed bed body (1), characterized in that: An electric regeneration unit and a monitoring system are integrated in the polishing mixed bed body (1); the electric regeneration unit comprises an electrode (2) and an ion exchange membrane (3), forming an adsorption-regeneration closed-loop system; The monitoring system is integrated with a multi-parameter online sensor (4) to monitor the effluent water quality in real time and dynamically determine the resin adsorption saturation.

2. The electro-regeneration polishing mixed bed for preparing ultrapure water according to claim 1, characterized in that: The electrode (2) is a partitioned structure including an anode region (5), a cathode region (6) and an intermediate mixing region (7), and the intermediate mixing region (7) is filled with an ion exchange resin (9); The ion exchange membrane (3) is provided with two groups, which are respectively arranged between the anode region (5) and the intermediate mixing region (7), and between the cathode region (6) and the intermediate mixing region (7).

3. The electro-regeneration polishing mixed bed for preparing ultrapure water according to claim 2, characterized in that: Multiple physical isolation layers (8) are also provided in the intermediate mixing zone (7), and each group of physical isolation layers (8) is filled with ion exchange resins (9) with different functions.

4. The electro-regeneration polishing mixed bed for preparing ultrapure water according to claim 3, characterized in that: The physical isolation layer (8) is a porous partition, and the ion exchange resin (9) includes: heavy metal adsorption resin, alkali metal adsorption resin, and organic matter adsorption resin.

5. The electro-regeneration polishing mixed bed for preparing ultrapure water according to claim 1, characterized in that: The multi-parameter online sensor (4) includes one or more of a conductivity sensor, a TOC sensor, a metal ion concentration sensor and a particle counter.

6. The electro-regeneration polishing mixed bed for preparing ultrapure water according to claim 4, characterized in that: The adsorption-regeneration closed-loop system process is driven by a DC electric field, causing the ions adsorbed in the ion exchange resin (9) to migrate to the electrode (2) area and be discharged, while H + / OH- diffuses back from the electrode (2) region to the resin layer, replacing the adsorption site.

7. The electro-regeneration polishing mixed bed for preparing ultrapure water according to claim 5, characterized in that: The monitoring system is also provided with a critical value, which is determined based on conductivity, TOC, metal ion concentration, and particulate matter quantity indicators; When the outlet water quality reaches the preset critical value, electric regeneration is automatically started.

Images