Electromagnetic induction type conductivity meter flow cell for hydrofluoric acid on-line measurement

Abstract

An electromagnetic induction type conductivity meter flow cell for hydrofluoric acid on-line measurement comprises a DN50 pipeline, a DN65-DN50 reducing tee and a DN20 pipeline, the DN20 pipeline is horizontally arranged and connected with the DN65-DN50 reducing tee through a left tee sealing cover and a right tee sealing cover, and a DN20 movable flange is arranged on the DN20 pipeline in a sleeving mode; the DN50 pipeline is connected with the middle part of the DN65-DN50 reducing tee; the DN50 pipeline is provided with a sensor connector, a locking nut and a tee upper threaded connector; the sensor connector connects and seals the conductivity electrode, and the locking nut connects and seals the sensor connector and the tee upper threaded connector. And the locking nut and the DN65-DN50 reducing tee are connected and fixed by a threaded joint on the tee.

Description

Technical Field

[0001] This patent relates to the field of analytical instrument technology. Specifically, it relates to a flow cell for an electromagnetic induction conductivity meter used for online measurement of hydrofluoric acid. Background Technology

[0002] The flow cell, as a key component of a flow analysis system, significantly impacts the performance of the entire analysis and detection system, especially for the measurement of hydrofluoric acid. Due to its highly corrosive and volatile nature, online measurement is relatively difficult. Flow cells for hydrofluoric acid measurement must meet the following requirements:

[0003] (i) In terms of materials, all materials in contact with hydrofluoric acid in the flow cell must be corrosion-resistant. Generally, only nickel-copper alloys (such as MONEL 400 alloy) and plastics (PTFE, PE, PP, etc.) can be used. These materials can meet the operating conditions of hydrofluoric acid.

[0004] (ii) In terms of volume, the volume of the flow cell should be as small as possible to ensure the timeliness of the measurement process.

[0005] (iii) In terms of pressure resistance, the pressure resistance of the flow cell is an extremely critical parameter and a necessary prerequisite for ensuring safe use.

[0006] In summary, designing a simple, compact, and pressure-resistant reliable flow cell remains a technical challenge. Utility Model Content

[0007] The purpose of this patent is to provide a flow cell for online detection in a non-contact electromagnetic induction conductivity meter, used for storing and circulating hydrofluoric acid. This flow cell is mainly used for the installation and sealing of the non-contact electromagnetic induction conductivity meter and process pipelines, ensuring that the basic measurement conditions of the non-contact electromagnetic induction conductivity meter are met while also preventing hydrofluoric acid leakage during the detection process.

[0008] The technical solution of this patent is as follows: A flow cell for an electromagnetic induction conductivity meter for online measurement of hydrofluoric acid includes a DN50 pipe, a DN65-DN50 reducing tee, and a DN20 pipe. The DN20 pipe is placed horizontally and is connected to the DN65-DN50 reducing tee via left and right caps. A DN20 flange is fitted onto the DN20 pipe. The DN50 pipe is connected to the middle of the DN65-DN50 reducing tee. The DN50 pipe has a sensor connector, a locking nut, and a threaded connector on the tee. The sensor connector connects and seals the conductivity electrode. The locking nut connects and seals the sensor connector to the threaded connector on the tee. The threaded connector on the tee connects and fixes the locking nut and the DN65-DN50 reducing tee.

[0009] It also includes an O-ring, which is located between the locking nut and the threaded joint of the tee.

[0010] The O-ring is made of rubber.

[0011] A short pipe with a flange sealing surface is installed on the DN20 live flange.

[0012] The sensor connector is threaded to the conductivity electrode, the locking nut is threaded to the tee threaded connector, and the DN65-DN50 reducing tee is welded with threaded connectors and tee left and right covers.

[0013] The flow cell of the electromagnetic induction conductivity meter used for online hydrofluoric acid measurement is made of polyvinylidene fluoride.

[0014] The internal volume of the DN65-DN50 reducing tee is 0.49L.

[0015] The significant advantage of this patent lies in the fact that the flow cell is designed specifically for the conductivity electrode characteristics of electromagnetic induction conductivity meters. It not only meets the requirements of the conductivity electrode but also has a suitable volume for the flow capacity of hydrofluoric acid produced in the process, ensuring real-time online measurement. Furthermore, the selection of a material resistant to hydrofluoric acid corrosion improves service life and process safety.

[0016] (1) Improved detection speed and reproducibility: The flow cell design allows hydrofluoric acid to flow continuously within it, enabling the detection device to continuously and rapidly detect changes in physical properties, thereby improving the measurement speed and making online measurement possible. In addition, since the liquid flow state within the flow cell is relatively stable, the detection conditions can be effectively controlled, resulting in better reproducibility of the measurement results, which is beneficial for accurate measurement and comparison of data.

[0017] (2) Automation and Online Monitoring: The practicality of flow-through cells allows for integration with automated equipment, enabling automatic sample loading, testing, and data processing, reducing the complexity and errors of manual operation. Online monitoring is a major advantage of flow-through cells, allowing for real-time monitoring of key parameters during the production process, improving product quality and production efficiency. This is particularly important for industries requiring continuous production.

[0018] (3) Reduce systematic errors and interference: The flow cell is designed with a certain degree of anti-interference capability, resisting the influence of external temperature, electromagnetic interference, etc., reducing systematic errors and ensuring the stability of measurement results. The hydrofluoric acid in the flow cell is in a stable flow state, which is conducive to the processing equipment obtaining accurate concentration information.

[0019] (4) Adaptable to various application scenarios: The flow cell can adapt to various measurement needs. Even in some application scenarios with large environmental influence factors, it can meet the usage conditions and ensure online measurement.

[0020] (5) Reduce safety measurement risks: The design of the flow cell allows hydrofluoric acid to flow inside it, while the measuring equipment detects it through non-contact methods such as sensors, thereby avoiding direct contact between operators and hydrofluoric acid and reducing the risk of corrosion and injury caused by direct contact with hydrofluoric acid through the skin, eyes and other parts of the body. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the flow cell of the electromagnetic induction conductivity meter for online measurement of hydrofluoric acid, as per this patent. In the diagram: 1. Conductivity electrode; 2. Sensor connector; 3. Locking nut; 4. O-ring; 5. T-joint with threaded fitting; 6. DN65-DN50 reducing tee; 7. Left and right covers for the tee; 8. DN20 flange; 9. Short pipe for flange sealing surface; 10. DN20 pipe; 11. DN50 pipe. Detailed Implementation

[0022] Many specific details are set forth in the following description to provide a full understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of this application; therefore, this application is not limited to the specific embodiments disclosed below.

[0023] The terminology used in one or more embodiments of this application is for the purpose of describing particular embodiments only and is not intended to limit the scope of one or more embodiments of this application. The singular forms “a,” “the,” and “the” used in one or more embodiments of this application and in the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” used in one or more embodiments of this application refers to and includes any or all possible combinations of one or more associated listed items.

[0024] It should be understood that although the terms first, second, etc., may be used to describe various information in one or more embodiments of this application, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, first may also be referred to as second without departing from the scope of one or more embodiments of this application, and similarly, second may also be referred to as first.

[0025] The patent will be further described below with reference to the accompanying drawings.

[0026] like Figure 1As shown, an electromagnetic induction conductivity meter flow cell for online hydrofluoric acid measurement includes a DN50 pipe 11, a DN65-DN50 reducing tee 6, and a DN20 pipe 10. The DN20 pipe 10 is placed horizontally and connected to the DN65-DN50 reducing tee 6 via left and right caps 7. The DN20 pipe 10 is also equipped with a DN20 live flange 8 and a short pipe 9 for the flange sealing surface. The DN50 pipe 11 is connected to the middle of the DN65-DN50 reducing tee 6, and has a sensor connector 2, a locking nut 3, and a threaded connector 5 on the tee.

[0027] The sensor connector 2 is used to connect and seal the conductivity electrode 1 of the non-contact electromagnetic induction conductivity meter. The connection method is threaded connection.

[0028] The locking nut 3 is used to connect and seal the sensor connector 2 to the threaded connector 5 on the tee. The connection method is threaded connection.

[0029] O-ring 4 is used to seal the connection between locking nut 3 and tee threaded connector 5. The O-ring is made of rubber.

[0030] The threaded tee connector 5 is used to connect and fix the locking nut 3 and the DN65-DN50 reducing tee 6;

[0031] The DN65-DN50 reducing tee 6 is used to connect the threaded fitting 5 on the tee, the left and right sealing caps 7 on the tee, and the short pipe 9 on the flange sealing surface. The connection method is welding. The internal volume of the DN65-DN50 reducing tee 6 is approximately 0.49L.

[0032] The left and right covers of the tee are welded to the horizontal left and right ends of the DN65-DN50 reducing tee 6, and the center hole is drilled and welded to the flange sealing surface short pipe 9;

[0033] The DN20 live flange 8 is fitted onto the short pipe 9 on the flange sealing surface, located between the left and right tee caps 7 and the short pipe 9 on the flange sealing surface, and can be moved.

[0034] The flow cell is used in a non-contact electromagnetic induction conductivity meter for online detection of hydrofluoric acid. When the conductivity electrode 1 of the conductivity meter is measuring, the liquid being measured must pass through the DN 20 pipe 10 to form a closed loop with the surrounding liquid. Moreover, the relative position of the container wall and the liquid surface must be avoided during the measurement of the conductivity electrode 1, as these factors can affect the measurement. The flow cell design ensures that the distance between the conductivity electrode and the inner wall of the flow cell exceeds 20 mm.

[0035] This patent designs a flow cell for use in electromagnetic induction conductivity meters. The development of this flow cell ensures the online detection capability of hydrofluoric acid by the electromagnetic induction conductivity meter. This device can also be widely used in the chemical industry, such as in the preparation of hydrofluoric acid, and has promising application prospects.

[0036] The above description is merely a preferred embodiment of this patent and is not intended to limit this patent. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this patent shall be included within the scope of protection of this patent.

[0037] It should be noted that, for the sake of simplicity, the foregoing method embodiments are all described as a series of actions. However, those skilled in the art should understand that this application is not limited to the described order of actions, as some steps may be performed in other orders or simultaneously according to this application. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to this application.

[0038] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0039] The preferred embodiments disclosed above are merely illustrative of this application. The optional embodiments do not exhaustively describe all details, nor do they limit this patent to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this application. These embodiments are selected and specifically described in this application to better explain the principles and practical applications of this application, thereby enabling those skilled in the art to better understand and utilize this application.

Claims

1. A flow cell for an electromagnetic induction conductivity meter used for online measurement of hydrofluoric acid, characterized in that: The system includes a DN50 pipe (11), a DN65-DN50 reducing tee (6), and a DN20 pipe (10). The DN20 pipe (10) is placed horizontally and is connected to the DN65-DN50 reducing tee (6) through the left and right caps (7) of the tee. The DN20 live flange (8) is fitted onto the DN20 pipe (10). The DN50 pipe (11) is connected to the middle of the DN65-DN50 reducing tee (6). The DN50 pipe (11) has a sensor connector (2), a locking nut (3), and a threaded connector (5) on the tee. The sensor connector (2) connects and seals the conductivity electrode (1). The locking nut (3) connects and seals the sensor connector (2) and the threaded connector (5) on the tee. The threaded connector (5) on the tee connects and fixes the locking nut (3) and the DN65-DN50 reducing tee (6).

2. The flow cell of an electromagnetic induction conductivity meter for online measurement of hydrofluoric acid according to claim 1, characterized in that: It also includes an O-ring (4), which is located between the locking nut (3) and the tee threaded connector (5).

3. The flow cell of an electromagnetic induction conductivity meter for online measurement of hydrofluoric acid according to claim 2, characterized in that: The O-ring (4) is made of rubber.

4. The flow cell of an electromagnetic induction conductivity meter for online measurement of hydrofluoric acid according to claim 1, characterized in that: A short pipe (9) with a flange sealing surface is installed on the DN20 live flange (8).

5. The flow cell of an electromagnetic induction conductivity meter for online measurement of hydrofluoric acid according to claim 1, characterized in that: The sensor connector (2) is connected to the conductivity electrode (1) by a threaded connection. The locking nut (3) is connected to the threaded connector (5) on the tee by a threaded connection. The DN65-DN50 reducing tee (6) is welded to the threaded connector (5) on the tee and the left and right covers (7) on the tee.

6. The flow cell of an electromagnetic induction conductivity meter for online measurement of hydrofluoric acid according to claim 1, characterized in that: The flow cell of the electromagnetic induction conductivity meter used for online hydrofluoric acid measurement is made of polyvinylidene fluoride.

7. The electromagnetic induction conductivity meter flow cell for online measurement of hydrofluoric acid according to claim 6, characterized in that: The internal volume of the DN65-DN50 reducing tee (6) is 0.49L.

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