Model calculation-based degassing hydrogen conductivity online measurement system and method

Abstract

The invention discloses a degassing hydrogen conductivity online measurement system and method based on model calculation, and the method comprises the following steps: removing cations in a water sample, and then measuring the hydrogen conductivity index of the water sample; controlling the water sample, and degassing the water sample to obtain a degassed water sample; respectively detecting the conductivity and basic physical parameters of the degassed water sample; the degassing efficiency, the carbon dioxide content and the degassing hydrogen conductivity value of the water sample are calculated according to the hydrogen conductivity index of the water sample, the conductivity of the degassed water sample and the basic physical parameters, online measurement of the degassing hydrogen conductivity can be completed through the system and the method, and the system and the method have the advantages of being high in measurement precision, simple in system and low in cost.

Description

Technical Field

[0001] This invention belongs to the field of water quality analysis technology, and relates to an online measurement system and method for degassed hydrogen conductivity based on model calculation. Background Technology

[0002] In the steam-water circulation system of thermal power plants, the hydrogen conductivity of a water sample is a key parameter reflecting the degree of anion contamination. The traditional method involves continuously passing the water sample through a hydrogen-type cation exchange column and then measuring its conductivity using a conductivity meter. However, dissolved CO2 in the water sample can lead to inflated hydrogen conductivity measurements, affecting the accurate assessment of water quality.

[0003] Currently, physical degassing methods, such as membrane degassing, nitrogen purging, and boiling, are mainly used to eliminate CO2 interference. While effective, these methods suffer from drawbacks including complex equipment, slow response times, and high maintenance costs. For example, existing degassing devices require periodic replacement of membrane modules or consume large amounts of high-purity nitrogen, and measurement results are significantly affected by operating conditions.

[0004] In recent years, some studies have attempted to improve measurement accuracy through multi-parameter collaborative monitoring. For example, patent publication CN110487851B proposes a complex system combining electro-regenerative ion exchange technology and a degassing membrane. However, such systems still rely on complex hardware configurations and cannot achieve true real-time measurement and adaptive compensation.

[0005] Therefore, there is an urgent need in this field for a new technology for measuring the conductivity of degassed hydrogen that can both ensure measurement accuracy and reduce system complexity and cost. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide an online measurement system and method for degassing hydrogen conductivity based on model calculation. This system and method can perform online measurement of degassing hydrogen conductivity and has the characteristics of high measurement accuracy, system simplicity and low cost.

[0007] To achieve the above objectives, this invention discloses an online measurement method for degassed hydrogen conductivity based on model calculation, comprising: Remove cations from the water sample and then measure the hydrogen conductivity of the water sample. The water sample is controlled and then degassed to obtain a degassed water sample. The conductivity and basic physical parameters of the degassed water samples were measured respectively. The degassing efficiency, carbon dioxide content, and degassing hydrogen conductivity value of the water sample are calculated based on the hydrogen conductivity index of the water sample, the conductivity of the degassed water sample, and basic physical parameters.

[0008] This invention discloses an online measurement system for degassed hydrogen conductivity based on model calculation, comprising a cation exchange column, a first conductivity detection unit, a flow control unit, a membrane system degassing unit, a second conductivity detection unit, a water quality multi-parameter sensor, a multi-parameter acquisition module, and a model calculation processor. The outlet of the cation exchange column is connected to the inlet of the membrane system degassing unit via the first conductivity detection unit and the flow control unit. The outlet of the membrane system degassing unit is connected to the inlet of the second conductivity detection unit and the inlet of the water quality multi-parameter sensor, respectively. The output terminals of the second conductivity detection unit and the water quality multi-parameter sensor are connected to the input terminal of the multi-parameter acquisition module, and the output terminal of the multi-parameter acquisition module is connected to the input terminal of the model calculation processor.

[0009] Furthermore, the specific work process is as follows: 1) The water sample passes through a cation exchange column to remove cations from the water, and then enters the first conductivity detection unit to measure the hydrogen conductivity index of the water sample. 2) The water effluent from the first conductivity detection unit enters the flow control unit; 3) The effluent from the flow control unit enters the membrane system degassing unit; 4) The water effluent from the membrane system degassing unit is divided into two paths. One part enters the second conductivity detection unit to measure the conductivity of the water sample after some gas has been removed; the other part enters the water quality multi-parameter sensor to obtain the basic physical parameters of the water sample. 5) The multi-parameter acquisition module acquires the data detected by the first conductivity detection unit, the data detected by the water quality multi-parameter sensor, and the data detected by the second conductivity detection unit, and sends them to the model calculation processor; 6) The model calculation processor has a built-in degassing hydrogen conductivity calculation model, which calculates the degassing efficiency, the actual carbon dioxide content in the water sample, and the degassing hydrogen conductivity value under the corresponding water quality conditions based on the data sent by the multi-parameter acquisition module.

[0010] Furthermore, the cation exchange column is filled with a hydrogen-form strong acid cation exchange resin.

[0011] Furthermore, the flow control unit includes a precision regulating valve and a flow meter.

[0012] Furthermore, the flow rate of the water sample is controlled at 100~300mL / min using a flow control unit.

[0013] Furthermore, the membrane system degassing unit uses hollow fiber membrane modules to remove dissolved gases from the water sample.

[0014] Furthermore, the basic physical parameters of the water sample include at least water sample pressure, temperature, and flow rate.

[0015] This invention discloses a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the steps of the online measurement method for degassed hydrogen conductivity based on model calculation.

[0016] This invention discloses a computer-readable storage medium storing a computer program that, when executed by a processor, implements the steps of the online measurement method for degassing hydrogen conductivity based on model calculation.

[0017] The present invention has the following beneficial effects: In practical operation, the online measurement system and method for degassed hydrogen conductivity based on model calculation described in this invention introduces a flow control unit, a multi-parameter acquisition module, and a model calculation processor. By establishing a compensation model for degassed hydrogen conductivity in relation to temperature and flow rate, real-time compensation and accurate calculation of hydrogen conductivity measurements are achieved. This effectively solves the problems of large measurement errors and slow response speed caused by CO2 interference in traditional measurement methods, and features high measurement accuracy, system simplicity, and low cost. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a flowchart of the method of the present invention.

[0020] Among them, 1 is a cation exchange column, 2 is a first conductivity detection unit, 3 is a flow control unit, 4 is a membrane system degassing unit, 5 is a second conductivity detection unit, 6 is a water quality multi-parameter sensor, 7 is a multi-parameter acquisition module, and 8 is a model calculation processor. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] In the description of this invention, it should be understood that the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0023] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0024] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes such combinations. For example, A and / or B can represent three cases: A alone, A and B simultaneously, and B alone. Additionally, the character " / " in this invention generally indicates that the preceding and following objects have an "or" relationship.

[0025] It should be understood that although terms such as first, second, third, etc., may be used in the embodiments of the present invention to describe the preset range, these preset ranges should not be limited to these terms. These terms are only used to distinguish the preset ranges from one another. For example, without departing from the scope of the embodiments of the present invention, the first preset range may also be referred to as the second preset range, and similarly, the second preset range may also be referred to as the first preset range.

[0026] Depending on the context, the word "if" as used here can be interpreted as "when," "when," "in response to determination," or "in response to detection." Similarly, depending on the context, the phrase "if determination" or "if detection (of the stated condition or event)" can be interpreted as "when determination," "in response to determination," "when detection (of the stated condition or event)," or "in response to detection (of the stated condition or event)."

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0028] The accompanying drawings illustrate various structural schematic diagrams according to embodiments disclosed in this invention. These drawings are not to scale, and some details have been enlarged for clarity, and some details may have been omitted. The shapes of the various regions and layers shown in the drawings, as well as their relative sizes and positional relationships, are merely exemplary and may deviate from reality due to manufacturing tolerances or technical limitations. Furthermore, those skilled in the art can design regions / layers with different shapes, sizes, and relative positions as needed.

[0029] Example 1 The online measurement method for degassed hydrogen conductivity based on model calculation described in this invention includes the following steps: 1) The water sample passes through a cation exchange column 1 filled with hydrogen-form strong acid cation exchange resin to remove cations from the water, and then enters the first conductivity detection unit 2 to measure the hydrogen conductivity index of the water sample. 2) The water effluent from the first conductivity detection unit 2 enters the flow control unit 3. The flow control unit 3 includes a precision regulating valve and a flow meter. The flow rate of the water sample is controlled at 100~300mL / min by the flow control unit 3. 3) The effluent from the flow control unit 3 enters the membrane system degassing unit 4. The membrane system degassing unit 4 uses a hollow fiber membrane module to remove dissolved gases from the water sample. It should be noted that the membrane system degassing unit 4 only removes a portion of the dissolved gases to avoid problems such as system complexity and high cost caused by pursuing high degassing efficiency. 4) The water effluent from the membrane system degassing unit 4 is divided into two paths. One part enters the second conductivity detection unit 5 to measure the conductivity of the water sample after some gas has been removed; the other part enters the water quality multi-parameter sensor 6 to obtain the basic physical parameters of the water sample, including water sample pressure, temperature and flow rate. 5) The multi-parameter acquisition module 7 acquires the data detected by the first conductivity detection unit 2, the data detected by the water quality multi-parameter sensor 6, and the data detected by the second conductivity detection unit 5, and sends them to the model calculation processor 8; 6) The model calculation processor 8 has a built-in degassing hydrogen conductivity calculation model. Based on the parameters collected by the multi-parameter acquisition module 7, it calculates the degassing efficiency under the corresponding water quality conditions, thereby clarifying the actual carbon dioxide content in the water sample and calculating the accurate degassing hydrogen conductivity value.

[0030] This invention uses a dedicated algorithm in the model calculation processor 8 to calculate the accurate degassing hydrogen conductivity by integrating measured parameters such as water sample temperature, flow rate, pressure, hydrogen conductivity, and coarse degassing hydrogen conductivity. This reduces the dependence on physical degassing devices and improves the system's response speed and stability.

[0031] Example 2 refer to Figure 1 The online measurement system for degassing hydrogen conductivity based on model calculation of the present invention includes a cation exchange column 1, a first conductivity detection unit 2, a flow control unit 3, a membrane system degassing unit 4, a second conductivity detection unit 5, a water quality multi-parameter sensor 6, a multi-parameter acquisition module 7, and a model calculation processor 8. The outlet of the cation exchange column 1 is connected to the inlet of the membrane system degassing unit 4 via the first conductivity detection unit 2 and the flow control unit 3. The outlet of the membrane system degassing unit 4 is connected to the inlet of the second conductivity detection unit 5 and the inlet of the water quality multi-parameter sensor 6, respectively. The output terminals of the second conductivity detection unit 5 and the water quality multi-parameter sensor 6 are connected to the input terminal of the multi-parameter acquisition module 7, and the output terminal of the multi-parameter acquisition module 7 is connected to the input terminal of the model calculation processor 8.

[0032] Compared with the prior art, the present invention has the following characteristics: High measurement accuracy: By establishing a multi-parameter compensation model, CO2 interference can be effectively eliminated, accurately reflecting the true level of anion pollution in water samples; The system is simplified and low-cost: it reduces reliance on complex degassing hardware, simplifies the system structure, and reduces maintenance requirements and operating costs; Fast response speed: It avoids the time required for the water sample to reach equilibrium with the degassing medium in traditional degassing methods, and achieves near real-time measurement; Strong adaptability: The model has a self-learning function and can automatically adjust parameters according to changes in water quality, maintaining measurement accuracy over a long period of time; Easy to integrate: The system has a compact structure and can be easily integrated into existing water vapor quality monitoring systems.

[0033] It should be noted that this invention introduces a flow regulation unit, a multi-parameter acquisition module 7, and a model calculation processor 8. By establishing a compensation model for the degassed hydrogen conductivity in relation to temperature and flow rate, real-time compensation and accurate calculation of the hydrogen conductivity measurement value are achieved, effectively solving the problems of large measurement errors and slow response speed caused by CO2 interference in traditional measurement methods. This invention achieves high-precision online measurement of degassed hydrogen conductivity without the need for complex physical degassing devices, significantly reducing equipment costs and maintenance complexity.

[0034] Example 3 A computer device includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the steps of the model-based online measurement method for degassed hydrogen conductivity. For example, the method includes: removing cations from a water sample and then measuring the hydrogen conductivity of the water sample; controlling the water sample and then degassed it to obtain a degassed water sample; detecting the conductivity and basic physical parameters of the degassed water sample; and calculating the degassed efficiency, carbon dioxide content, and degassed hydrogen conductivity value of the water sample based on the hydrogen conductivity, the conductivity of the degassed water sample, and the basic physical parameters. The memory may include main memory, such as high-speed random access memory, and may also include non-volatile memory, such as at least one disk storage device. The processor, network interface, and memory are interconnected via an internal bus, which can be an industry-standard architecture bus, a peripheral component interconnection standard bus, an extended industry-standard architecture bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. The memory is used to store programs; specifically, the program may include program code, which includes computer operation instructions. The memory may include main memory and non-volatile memory, and provides instructions and data to the processor.

[0035] Example 4 A computer-readable storage medium stores a computer program that, when executed by a processor, implements the steps of the model-based online measurement method for degassed hydrogen conductivity. For example, the method includes: removing cations from a water sample and then measuring the hydrogen conductivity of the water sample; controlling the water sample and then degassed it to obtain a degassed water sample; detecting the conductivity and basic physical parameters of the degassed water sample; and calculating the degassed efficiency, carbon dioxide content, and degassed hydrogen conductivity value of the water sample based on the hydrogen conductivity, the conductivity of the degassed water sample, and the basic physical parameters. Specifically, the computer-readable storage medium includes, but is not limited to, volatile memory and / or non-volatile memory. The volatile memory may include random access memory (RAM) and / or cache memory, etc. The non-volatile memory may include read-only memory (ROM), hard disk, flash memory, optical disk, magnetic disk, etc.

[0036] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0037] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0038] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0039] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0040] Other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and disclosure of the invention. This application is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the following claims.

[0041] It should be understood that the present invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

[0042] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the present invention. Any simple modifications, alterations, or equivalent structural changes made to the above embodiments based on the technical essence of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A method for online measurement of degassed hydrogen conductivity based on model calculation, characterized in that, include: Remove cations from the water sample and then measure the hydrogen conductivity of the water sample. The water sample is controlled and then degassed to obtain a degassed water sample. The conductivity and basic physical parameters of the degassed water samples were measured respectively. The degassing efficiency, carbon dioxide content, and degassing hydrogen conductivity value of the water sample are calculated based on the hydrogen conductivity index of the water sample, the conductivity of the degassed water sample, and basic physical parameters.

2. An online measurement system for degassed hydrogen conductivity based on model calculation, characterized in that, The system includes a cation exchange column (1), a first conductivity detection unit (2), a flow control unit (3), a membrane system degassing unit (4), a second conductivity detection unit (5), a water quality multi-parameter sensor (6), a multi-parameter acquisition module (7), and a model calculation processor (8). The outlet of the cation exchange column (1) is connected to the inlet of the membrane system degassing unit (4) via the first conductivity detection unit (2) and the flow control unit (3). The outlet of the membrane system degassing unit (4) is connected to the inlet of the second conductivity detection unit (5) and the inlet of the water quality multi-parameter sensor (6), respectively. The output end of the second conductivity detection unit (5) and the output end of the water quality multi-parameter sensor (6) are connected to the input end of the multi-parameter acquisition module (7). The output end of the multi-parameter acquisition module (7) is connected to the input end of the model calculation processor (8).

3. The online measurement system for degassed hydrogen conductivity based on model calculation according to claim 1, characterized in that, The specific work process is as follows: 1) The water sample passes through the cation exchange column (1) to remove the cations in the water, and then enters the first conductivity detection unit (2) to measure the hydrogen conductivity index of the water sample. 2) The water effluent from the first conductivity detection unit (2) enters the flow control unit (3); 3) The effluent from the flow control unit (3) enters the membrane system degassing unit (4); 4) The water effluent from the membrane system degassing unit (4) is divided into two paths. One part enters the second conductivity detection unit (5) to measure the conductivity of the water sample after some gas has been removed; the other part enters the water quality multi-parameter sensor (6) to obtain the basic physical parameters of the water sample. 5) The multi-parameter acquisition module (7) acquires the data detected by the first conductivity detection unit (2), the data detected by the water quality multi-parameter sensor (6), and the data detected by the second conductivity detection unit (5), and sends them to the model calculation processor (8); 6) The model calculation processor (8) has a built-in degassing hydrogen conductivity calculation model. Based on the data sent by the multi-parameter acquisition module (7), it calculates the degassing efficiency, the actual carbon dioxide content in the water sample, and the degassing hydrogen conductivity value under the corresponding water quality conditions.

4. The online measurement system for degassed hydrogen conductivity based on model calculation according to claim 3, characterized in that, The cation exchange column (1) is filled with hydrogen-form strong acid cation exchange resin.

5. The online measurement system for degassed hydrogen conductivity based on model calculation according to claim 3, characterized in that, The flow control unit (3) includes a precision regulating valve and a flow meter.

6. The online measurement system for degassed hydrogen conductivity based on model calculation according to claim 3, characterized in that, The flow rate of the water sample is controlled at 100~300mL / min by the flow control unit (3).

7. The online measurement system for degassed hydrogen conductivity based on model calculation according to claim 3, characterized in that, The membrane system degassing unit (4) uses a hollow fiber membrane module to remove dissolved gases from the water sample.

8. The online measurement system for degassing hydrogen conductivity based on model calculation according to claim 3, characterized in that, The basic physical parameters of the water sample include at least water sample pressure, temperature, and flow rate.

9. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the steps of the online measurement method for degassing hydrogen conductivity based on model calculation as described in claim 1.

10. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the steps of the online measurement method for degassing hydrogen conductivity based on model calculation as described in claim 1.

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