Colloid removal system

Abstract

The invention belongs to the technical field of nuclear power, and particularly relates to a colloid removing system. The system pipeline comprises a diverging pipe, an ultrasonic pipe, a charge adsorption pipe and a transparent pipe which are connected in sequence, the narrow end of the horizontally arranged diverging pipe is an inlet of the system pipeline, the wide end of the diverging pipe is communicated with the charge adsorption pipe through the horizontally arranged ultrasonic pipe, and the charge adsorption pipe is connected with the ion detection device through the transparent pipe. A first flow sensor, an ultraviolet lamp, a filter screen and a second flow sensor are sequentially arranged in the front section, close to the diverging pipe, of the ultrasonic pipe from upstream to downstream; and the controller is in communication connection with the electric control pressure valve, the first flow sensor and the second flow sensor. According to the system disclosed by the invention, the interference of colloid on ion chromatography analysis can be remarkably reduced through multiple sterilization and purification, and the analysis accuracy and efficiency are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of nuclear power, and particularly relates to a colloid removal system. Background Art

[0002] In the operation of the coolant system of a nuclear power plant loop, ion chromatography analysis, as a key technical means, is crucial for monitoring the ionic components in the coolant water sample. However, due to the contact of the coolant with various metal materials and radioactive substances during the circulation process, its ionic components become extremely complex, and colloids are inevitably generated. The presence of these colloids has become a major obstacle in ion chromatography analysis.

[0003] The tiny size and complex composition of colloidal particles make them extremely likely to interfere with the detection of target ions during ion chromatography analysis. Specifically, colloidal particles will occupy the surface of the stationary phase of the chromatographic column, reducing the column efficiency and thus affecting the separation effect of ions. At the same time, the impurity components in the colloid may also interact with the target ions, resulting in deviations in the analysis results. In view of this, it is urgent to reduce the serious interference of colloids on ion chromatography analysis. Summary of the Invention

[0004] To overcome the problems existing in the related art, a colloid removal system is provided.

[0005] According to one aspect of the embodiments of the present disclosure, a colloid removal system is provided. The system includes: a controller, a system pipeline, and an ion detection device. The system pipeline includes a gradually expanding pipe, an ultrasonic pipe, a charge adsorption pipe, and a transparent pipe connected in sequence. The narrow end of the horizontally arranged gradually expanding pipe is the inlet of the system pipeline. The wide end of the gradually expanding pipe is connected to the charge adsorption pipe through the horizontally arranged ultrasonic pipe. The charge adsorption pipe is connected to the ion detection device through the transparent pipe;

[0006] An electronically controlled pressure valve is provided at the narrow end of the gradually expanding pipe for controlling the flow rate of the coolant water sample in the system pipeline;

[0007] Inside the front section of the ultrasonic pipe close to the gradually expanding pipe, a first flow sensor, an ultraviolet lamp, a filter screen, and a second flow sensor are sequentially arranged in the upstream to downstream order; the controller is communicatively connected to the electronically controlled pressure valve, the first flow sensor, and the second flow sensor respectively;

[0008] The first flow sensor is arranged near the wide end of the gradually expanding pipe and is used to collect the flow rate of the coolant water sample after passing through the gradually expanding pipe; the ultraviolet lamp is used to sterilize the coolant water sample in the system pipeline; the filter screen is used to intercept metal oxide colloid particles and precipitates generated during the circulation process; the second flow sensor is used to collect the flow rate of the coolant water sample after passing through the filter screen; multiple transducers are installed on the outer side of the rear section of the ultrasonic pipe close to the first charge adsorption pipe and are used to break up the colloid of the coolant water sample; the inner wall of the pipeline of the charge adsorption pipe is provided with electrodes to form an electric field inside the pipe, and respectively adsorb the tiny particles with positive charges and negative charges; a strong light lamp is arranged outside the transparent pipe. When an obvious light path appears in the transparent pipe under the irradiation of the strong light lamp, it indicates that the charge adsorption pipe needs to be replaced.

[0009] In a possible implementation manner, the charge adsorption pipe includes a vertically arranged first pipe section and a second pipe section. The tail end of the ultrasonic pipe is communicated with the lower end of the first pipe section. The upper end of the first pipe section is communicated with the upper end of the second pipe section through a horizontally arranged pipeline. The lower end of the second pipe section is communicated with the transparent pipe to form an inverted U-shaped pipeline.

[0010] In a possible implementation manner, the charge adsorption pipe is wavy.

[0011] In a possible implementation manner, when the controller detects that the flow rate data collected by the first flow sensor exceeds the first preset threshold, it adjusts the flow rate of the coolant water sample through the electronically controlled pressure valve until the flow rate data collected by the first flow sensor is less than or equal to the first preset threshold.

[0012] In a possible implementation manner, when the controller detects that the difference between the flow rate values collected by the first flow sensor and the second flow sensor is greater than the second preset threshold, it issues an alarm, and the alarm is used to prompt to replace the filter screen.

[0013] In a possible implementation manner, a settling tank is detachably installed below the filter screen and is used to collect the precipitates and larger colloid particles filtered by the filter screen.

[0014] In a possible implementation manner, the ultrasonic injection angle of each transducer forms an angle of 30° to 60° with the flow angle of the coolant water sample.

[0015] In a possible implementation manner, the electrodes in the charge adsorption pipe are annular electrodes.

[0016] In a possible implementation manner, the outer wall of the inner wall of the charge adsorption pipe has an insulating layer.

[0017] In a possible implementation manner, a gradually shrinking pipe is arranged between the transparent pipe and the ion detection device.

[0018] The beneficial effects of the present disclosure are as follows:

[0019] 1. An electronically controlled pressure valve and a diffuser tube are provided at the entrance, and are paired with a first flow sensor, which can automatically regulate the flow rate of the coolant water sample, ensure the subsequent processing efficiency, and create good conditions for the entire colloid removal process by reasonably controlling the flow velocity. The working state of the filter screen is monitored by the difference between the first flow sensor and the second flow sensor. When the difference is large, an alarm is issued to remind the staff to replace the filter screen, which is convenient for timely maintenance of the system and ensures the filtering effect.

[0020] 2. Ultraviolet lamps are introduced into the system for sterilization treatment, to eliminate in advance the interference of colloids or pre-colloid synthetic substances produced by microbial metabolism on subsequent ion detection, and reduce the factors causing colloids from the source. A specific number of transducers with optimized ultrasonic injection angles are installed on the outer side of the ultrasonic pipe. The kinetic energy of the flowing coolant water sample is utilized to enhance the ultrasonic treatment effect, and smaller colloid particles can be further broken up into tiny particles with relatively large positive and negative charges, which is convenient for removing colloids by subsequent electrophoresis properties. Electrodes are arranged in the charge adsorption tube to form an electric field, and tiny charged particles are adsorbed based on the electrophoresis properties of the colloids.

[0021] 3. A section of transparent or partially transparent pipeline is set up, in cooperation with a strong light outside the pipe, and the Tyndall effect is used to visually judge whether the colloids are removed completely, so as to decide in time whether to replace the charge adsorption tube, and ensure that the colloids in the coolant water sample finally entering the ion detection link are effectively removed.

[0022] 4. The electrodes in the charge adsorption tube are annular electrodes, which can fit the pipe wall without hindering the flow of the coolant, and a reasonable distance is set between the electrodes. At the same time, an insulating layer is provided on the outer pipe wall, which ensures the effect of the electric field while ensuring the use safety, avoids potential safety hazards caused by the staff forgetting to turn off the electrodes, and improves the overall safety and operation convenience of the system.

[0023] In this way, the system of the present disclosure can significantly reduce the interference of colloids on ion chromatography analysis through multiple sterilization and purification, and improve the accuracy and efficiency of the analysis. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic diagram of a colloid removal system shown in an embodiment of the present disclosure.

[0025] In the figure:

[0026] 1 electronically controlled pressure valve, 2 diffuser tube, 3 first flow sensor, 4 ultraviolet lamp, 5 filter screen,

[0027] 6 second flow sensor, 7 ultrasonic pipe, 71 transducer, 8 first pipe section, 9 second pipe section,

[0028] 10 strong light, 11 transparent pipe, 12 ion detection device. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] The present disclosure will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0030] Unless otherwise defined, the technical and scientific terms used in the present disclosure have the same meanings as those commonly understood by those skilled in the technical field to which the present disclosure belongs; the terms used in the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure; the term "including" and any variations thereof in the text of the present disclosure are intended to cover non-exclusive inclusion. Obviously, the embodiments described in the present disclosure are only a part of the embodiments of the present disclosure, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present disclosure without creative efforts shall fall within the scope of protection of the present disclosure.

[0031] Referring to "embodiments" in the present disclosure means that specific features, structures or characteristics described in connection with the embodiments may be included in at least one embodiment of the present disclosure. The phrase appears in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein may be combined with other embodiments.

[0032] Figure 1 It is a schematic diagram of a colloid removal system shown in an embodiment of the present disclosure. As Figure 1 shown, the system includes: a controller, a system pipeline, and an ion detection device. The system pipeline includes a gradually expanding pipe 2, an ultrasonic pipe 7, a charge adsorption pipe (a first pipe section 8 and a second pipe section 9), and a transparent pipe 11 connected in sequence. The horizontally arranged gradually expanding pipe 2 has an inner diameter that gradually increases from the narrow end to the wide end. The narrow end of the gradually expanding pipe 2 is the inlet of the system pipeline. The wide end of the gradually expanding pipe 2 is connected to the charge adsorption pipe through the horizontally arranged ultrasonic pipe 7. The charge adsorption pipe is connected to the ion detection device 12 through the transparent pipe 11.

[0033] An electronically controlled pressure valve 1 is arranged at the narrow end of the gradually expanding pipe 2 for controlling the coolant water sample flow rate of the system pipeline. Inside the front section of the ultrasonic pipe 7 close to the gradually expanding pipe, a first flow sensor 3, an ultraviolet lamp 4, a filter screen 5, and a second flow sensor 6 are arranged in sequence from upstream to downstream. The controller is communicatively connected to the electronically controlled pressure valve, the first flow sensor, and the second flow sensor respectively.

[0034] The first flow sensor is arranged at a position close to the wide end of the gradually expanding pipe for collecting the coolant water sample flow rate after passing through the gradually expanding pipe. When the controller detects that the flow rate data collected by the first flow sensor exceeds the first preset threshold, it adjusts the coolant water sample flow rate through the electronically controlled pressure valve until the flow rate data collected by the first flow sensor is less than or equal to the first preset threshold to ensure the efficiency of subsequent processing.

[0035] The ultraviolet lamp is used to sterilize the coolant water sample in the system pipeline. Since some microorganisms will also produce colloids or colloid precursor compounds that are difficult to remove during their own metabolism, it is necessary to sterilize in advance to prevent interference with subsequent ion detection.

[0036] The filter screen is used to intercept metal oxide colloid particles and precipitates generated during the circulation process. A sedimentation tank is detachably installed below the filter screen. The sedimentation tank can collect the precipitates and larger colloid particles filtered by the filter screen, and can be cleaned or replaced by replacing the filter screen at the same time.

[0037] The second flow sensor is used to collect the flow rate of the coolant water sample after passing through the filter screen. When the controller detects that the difference between the flow rate values collected by the first flow sensor and the second flow sensor is greater than the second preset threshold, an alarm is issued, and this alarm is used to prompt to replace the filter screen.

[0038] A plurality of transducers 71 are installed on the outer side of the rear section of the ultrasonic tube 7 close to the charge adsorption tube. The incident angle of the ultrasonic wave of each transducer forms an angle of 30° to 60° with the flow angle of the coolant water sample. For example, the incident angle can be 33°, 35°, 45° or 50°. This design of the incident angle can utilize the kinetic energy of the flowing coolant water sample to enhance the ultrasonic treatment effect.

[0039] Among the smaller colloid particles, there are particles with positive and negative charges, and as a whole, they may show no charge or very little charge. Through the ultrasonic treatment process, the smaller colloid particles are further broken up into tiny colloid particles, and these tiny particles can show relatively large positive and negative charges.

[0040] The inner wall of the pipeline of the charge adsorption tube is provided with electrodes, forming an electric field inside the tube. Using the electrophoresis property of the colloid, the tiny particles with positive and negative charges can be adsorbed respectively.

[0041] A strong light lamp is arranged outside the transparent tube. When an obvious light path appears under the irradiation of the strong light lamp on the transparent tube, it means that the charge adsorption tube needs to be replaced.

[0042] In a possible implementation manner, the charge adsorption tube may include a vertically arranged first tube section and a second tube section. The tail end of the ultrasonic tube is communicated with the lower end of the first tube section, the upper end of the first tube section is communicated with the upper end of the second tube section through a horizontally arranged pipeline, and the lower end of the second tube section is communicated with the transparent tube, thus forming an inverted U-shaped pipeline to increase the residence time of the coolant water sample in the charge adsorption pipeline, so that the colloids in the coolant water sample are fully adsorbed. In addition, the charge adsorption tube can also be in a wavy shape.

[0043] After the colloid removal treatment of the coolant water sample in the nuclear power plant loop through the system pipeline, the colloid residue amount and flow rate meet the flow detection requirements of the ion detection device, enabling the ion detection device to accurately detect the ion concentration in the coolant sample, and enabling the detection personnel to carry out targeted treatment after understanding the ion composition in the coolant water sample.

[0044] In an application example, the coolant water sample first flows through the electronically controlled pressure valve 1, the expansion tube 2, and the first flow sensor 3. First, it is necessary to ensure that the flow rate in the colloid removal system cannot be too fast. The expansion tube 2 can slow down the flow rate by increasing the inner diameter of the tube, and at the same time, cooperate with the electronically controlled pressure valve 1 and the first flow sensor 3 to further control the flow rate of the coolant.

[0045] After that, the coolant water sample passes through the ultraviolet lamp 4 and the filter screen 5. The irradiation of the ultraviolet lamp 4 can kill the microorganisms in the coolant water sample. Some microorganisms will produce colloids or colloidal precursor substances that are difficult to remove during their own metabolism and need to be removed in advance. The filter screen 5 can filter out larger impurity substances (such as rust) and colloids in the coolant water sample. A detachable sedimentation tank is installed below the filter screen 5, which can conveniently take out the settled impurities when replacing the filter screen 5 without further cleaning of the pipeline.

[0046] A second flow sensor 6 is set at the downstream position of the filter screen 5. The controller issues an alarm when detecting that the difference between the first flow sensor 3 and the second flow sensor 6 is greater than the preset threshold to prompt the staff to replace the filter screen 5.

[0047] Then the coolant enters the ultrasonic pipeline. A plurality of ultrasonic transducers 71 are attached to the outer wall of the ultrasonic tube 7. A coupling agent is filled between the ultrasonic transducer 71 and the outer wall of the ultrasonic tube 7 to improve the ultrasonic propagation efficiency between the ultrasonic transducer 7 and the tube wall. The incident angle of the ultrasonic wave of the ultrasonic transducer 71 is set to an angle of 30° to 60° with the water flow direction. This setting can utilize the kinetic energy of the flowing coolant water sample to enhance the ultrasonic treatment effect. Ultrasonic waves can completely disperse smaller colloid clusters. The colloid clusters are overall uncharged or have very little charge. Dispersing them can separate the positively and negatively charged ion bodies in the colloid clusters, thus showing obvious electric properties.

[0048] After the ultrasonic treatment, it passes through the first pipe section 8 and the second pipe section 9 of the charge adsorption pipe. Electrodes are provided on the inner walls of the first pipe section 8 and the second pipe section 9 to form a corresponding electric field inside the pipe, and the colloid clusters after ultrasonic treatment are adsorbed and filtered through electrophoresis.

[0049] In a possible implementation manner, the electrodes in the charge adsorption pipe are annular electrodes. For example, the electrodes in the first pipe section 8 and the second pipe section 9 are annular electrodes, which can ensure that they fit the pipe wall while not hindering the flow of the coolant, and there is a preset distance between the annular electrodes.

[0050] In a possible implementation, the outer tube wall inside the charge adsorption tube has an insulating layer. For example, the outer tube walls of the first tube section 8 and the second tube section 9 have insulating layers.

[0051] Finally, a transparent or partially transparent pipeline 11 is provided, and a strong light lamp 10 is arranged outside the tube. By observing whether there is an obvious light path inside the tube, it is judged whether the colloid has been removed completely (Tyndall effect). If there is no obvious light path, it proves that the colloid has been removed completely. If a light path appears, it proves that there is colloid residue, and the charge adsorption tube needs to be replaced or cleaned in time. A reducing tube with an inner diameter gradually decreasing in the water flow direction is arranged between the transparent tube 11 and the ion detection device 12, so that the flow rate of the water flowing out of the transparent tube 11 is reduced through the reducing tube to meet the requirements of ion detection.

[0052] The above shows and describes the basic principles and main features of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments. Therefore, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention.

[0053] The various embodiments of the present disclosure have been described above. The above description is exemplary and not exhaustive, and is also not limited to the disclosed embodiments. Many modifications and variations are obvious to those of ordinary skill in the art in the technical field without departing from the scope and spirit of the described embodiments. The selection of the terms used herein is intended to best explain the principles of the embodiments, the practical applications, or the improvements to the technology in the market, or to enable other ordinary skilled persons in the technical field to understand the embodiments disclosed herein.

Claims

1. A colloid removal system, characterized in that, The system includes: a controller, a system pipeline, and an ion detection device. The system pipeline includes a gradually expanding pipe, an ultrasonic pipe, a charge adsorption pipe, and a transparent pipe connected in sequence. The narrow end of the horizontally arranged gradually expanding pipe is the inlet of the system pipeline. The wide end of the gradually expanding pipe is connected to the charge adsorption pipe through the horizontally arranged ultrasonic pipe. The charge adsorption pipe is connected to the ion detection device through the transparent pipe; An electronically controlled pressure valve is arranged at the narrow end of the gradually expanding pipe to control the coolant water sample flow rate of the system pipeline; Inside the front section of the ultrasonic pipe close to the gradually expanding pipe, a first flow sensor, an ultraviolet lamp, a filter screen, and a second flow sensor are sequentially arranged in the upstream to downstream order. The controller is communicatively connected to the electronically controlled pressure valve, the first flow sensor, and the second flow sensor respectively; The first flow sensor is arranged at a position close to the wide end of the gradually expanding pipe to collect the coolant water sample flow rate after passing through the gradually expanding pipe. The ultraviolet lamp is used to sterilize the coolant water sample in the system pipeline. The filter screen is used to intercept metal oxide colloidal particles and precipitates generated during the circulation process. The second flow sensor is used to collect the coolant water sample flow rate after passing through the filter screen. Multiple transducers are installed on the outer side of the rear section of the ultrasonic pipe close to the first charge adsorption pipe to disperse the colloids in the coolant water sample. Electrodes are arranged on the inner wall of the pipeline of the charge adsorption pipe to form an electric field inside the pipe to adsorb tiny particles with positive and negative charges respectively. A strong light lamp is arranged on the outer side of the transparent pipe. When an obvious light path appears in the transparent pipe under the irradiation of the strong light lamp, it indicates that the charge adsorption pipe needs to be replaced.

2. The system according to claim 1, wherein The charge adsorption pipe includes a vertically arranged first pipe section and a second pipe section. The tail end of the ultrasonic pipe is connected to the lower end of the first pipe section. The upper end of the first pipe section is connected to the upper end of the second pipe section through a horizontally arranged pipeline. The lower end of the second pipe section is connected to the transparent pipe to form an inverted U-shaped pipeline.

3. The system according to claim 1, wherein The charge adsorption pipe is wavy.

4. The system according to claim 1, wherein When the controller detects that the flow rate data collected by the first flow sensor exceeds the first preset threshold, it regulates the coolant water sample flow rate through the electronically controlled pressure valve until the flow rate data collected by the first flow sensor is less than or equal to the first preset threshold.

5. The system according to claim 1, characterized in that, When the controller detects that the difference between the flow rate values collected by the first flow sensor and the second flow sensor is greater than the second preset threshold, it issues an alarm, and this alarm is used to prompt to replace the filter screen.

6. The system according to claim 1, wherein A sedimentation tank is detachably installed below the filter screen to collect the precipitates and larger colloidal particles filtered by the filter screen.

7. The system according to claim 1, wherein The incident angle of the ultrasonic wave of each transducer forms an angle of 30° to 60° with the flow angle of the coolant water sample.

8. The system according to claim 1, characterized in that, The electrodes in the charge adsorption pipe are annular electrodes.

9. The system according to claim 1, wherein There is an insulating layer on the outer wall inside the charge adsorption pipe.

10. The system according to claim 1, wherein A gradually shrinking pipe is arranged between the transparent pipe and the ion detection device.

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