Laser concentration on-line measuring device

Abstract

The utility model relates to the technical field of hydrometallurgy, and aims to provide a laser concentration on-line measuring device which comprises a laser concentration shell, a flow cell installed in the laser concentration shell and a sapphire prism installed on the side wall of the flow cell, and a liquid inlet pipeline and a liquid return pipeline are arranged at the two ends of the flow cell respectively. The large end of the sapphire prism is correspondingly provided with a light source and a high-resolution CCD detection sensor, and the small end of the sapphire prism is in contact with liquid to be measured in the flow cell during measurement. According to the full-interface reflection principle, laser is used for irradiating an interface between a medium and a specific container, a linear array is adopted, a high-resolution CCD detection sensor is used, a critical angle during total reflection is measured, then concentration calculation is carried out according to built-in scales, the concentration of liquid to be measured can be rapidly and conveniently obtained, operation is easy, practicability and reliability are achieved, applicability is high, and the method is suitable for popularization and application. The method can be widely applied to industries such as metallurgy, chemical engineering and food.

Description

Technical Field

[0001] This utility model relates to the field of hydrometallurgical technology, and in particular to an online laser concentration measurement device. Background Technology

[0002] In hydrometallurgical production, solution concentration is a commonly used process parameter, and accurate measurement of solution concentration is of great significance to the production process.

[0003] For measuring the concentration of common acid, alkali, and salt solutions, common methods include chemical titration, spectrophotometry, specific gravity, and optical refraction. Among these, chemical titration, spectrophotometry, and specific gravity are suitable for intermittent measurements but difficult to implement for continuous measurement in continuous production processes. Optical refraction utilizes the principle that the refractive index of a solution changes with its concentration, using a laser light source to continuously illuminate the liquid-liquid interface, enabling real-time, continuous measurement. However, refraction is only suitable for measuring the concentration of relatively pure solutions and not for solutions containing impurities. Utility Model Content

[0004] The purpose of this invention is to provide an online laser concentration measurement device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] An online laser concentration measurement device includes: a laser concentration housing, and a flow cell fixedly installed in the middle of the laser concentration housing. The flow cell has an inlet pipe and a return pipe at its two ends for inlet and outlet of the liquid to be measured in the flow cell, respectively. A sapphire prism is installed on one side wall of the flow cell. The larger end of the sapphire prism is equipped with a light source and a high-resolution CCD sensor mounted on the laser concentration housing. The smaller end of the sapphire prism contacts the liquid to be measured in the flow cell during measurement. The light source emits light, and the high-resolution CCD sensor detects the position of the light returning after total internal reflection.

[0007] An optical fiber is provided between the light source and the sapphire prism.

[0008] The sapphire prism is equipped with an embedded temperature sensor.

[0009] A gear pump is installed on the liquid inlet pipe, and the gear pump is located in the laser concentration housing.

[0010] The end of the inlet pipe is connected to the outlet pipe via a flange.

[0011] The laser concentration housing is also equipped with a screen.

[0012] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0013] Based on the principle of total interface reflection, this invention uses laser irradiation at the interface between the medium and a specific container. A high-resolution CCD sensor with a linear array is used to measure the critical angle at total reflection. Then, the concentration is calculated based on the built-in scale. This allows for the rapid and convenient acquisition of the concentration of the liquid to be tested. It is simple to operate, practical, reliable, and highly applicable. It can be widely used in industries such as metallurgy, chemical engineering, and food processing for quality control and analysis of various industrial production liquids such as acids, alkalis, and salts. Attached Figure Description

[0014] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0015] The attached figures are numbered and named as follows: 1. Laser concentration housing; 2. Screen; 3. High-resolution CCD detection sensor; 4. Embedded temperature sensor; 5. Light source; 6. Optical fiber; 7. Sapphire prism; 8. Flow cell; 9. Gear pump; 10. Inlet pipe; 11. Return pipe; 12. Flange; 13. Compression fitting; 14. Liquid outlet. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0017] 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.

[0018] like Figure 1As shown, the laser concentration online measurement device of this utility model includes a laser concentration housing 1, a flow cell 8 is fitted inside the laser concentration housing 1, a sapphire prism 7 is fixedly disposed on one side of the flow cell 8, an embedded temperature sensor 4 is disposed in the sapphire prism 7, and the small end of the sapphire prism 7 is in contact with the liquid to be measured in the flow cell 8 during detection; a light source 5 and a high-resolution CCD detection sensor 3 are disposed at the position corresponding to the large end of the sapphire prism 7, and an optical fiber 6 is disposed between the light source 5 and the sapphire prism 7. The light source 5, the optical fiber 6 and the high-resolution CCD detection sensor 3 are all positioned and installed in the laser concentration housing 1.

[0019] The flow cell 8 is provided with an inlet pipe 10 and a return pipe 11 at its two ends. The end of the inlet pipe 10 is connected to the liquid inlet 14 via a flange 12. The end of the return pipe 11 is connected to a compression fitting 13 via a flange 12. The compression fitting 13 is connected to an external tank for collecting the test liquid. A gear pump 9 is provided on the inlet pipe 10. The gear pump 9 is located in the laser concentration housing 1 and is used to transport liquid and regulate the liquid flow rate.

[0020] The laser concentration housing 1 is also equipped with a screen 2, which is used to display the measured data. The concentration of the liquid to be measured can then be calculated according to the built-in scale. The laser concentration housing 1 is also equipped with a microprocessor that is electrically connected to the screen 2, the light source 5, the high-resolution CCD detection sensor 3 and the gear pump 9.

[0021] In this embodiment, the laser concentration housing 1 is made of galvanized steel, the screen 2 is a 7-inch touchscreen, the flange 12 is made of 316L stainless steel, the inlet pipe 10 and the return pipe 11 are both made of PVC, and the compression fitting 13 is made of PTFE. The light source 5 uses a 294nm ultraviolet laser, which is not affected by absorption and scattering, and can easily measure the concentration of colored or dark-colored industrial production liquids containing particles. Specifically, the sampling port 14, flange 12, compression fitting 13, inlet pipe 10, and gear pump 9 work together to transport the liquid and regulate the liquid flow rate; the gear pump 9 and flow cell 8 work together, the gear pump 9 continuously pumps the liquid to be tested into the flow cell 8, the liquid to be tested enters the flow cell 8, and after measurement, it is discharged into the tank through the return pipe 11; the light source 5, optical fiber 6, embedded temperature sensor 4, sapphire prism 7, high-resolution CCD detection sensor 3, and flow cell 8 work together to measure the liquid.

[0022] The working principle of this utility model is as follows: the light emitted from the light source 5 enters the sapphire prism 7 from one side through the optical fiber 6 and reaches the contact surface between the sapphire prism 7 and the liquid to be tested. According to the different refractive indices of the liquid at the contact surface, part of the light is totally reflected to the other side of the prism. The position of the totally reflected light will change due to the change of the critical angle (the critical angle will be different due to the different refractive indices of the liquid). The high-resolution CCD detection sensor 3 is used to accurately detect the position of the totally reflected light. The embedded temperature sensor 4 is used to ensure the best temperature compensation. After the measurement is completed, the test liquid is discharged from the return pipe 11 under the action of the gear pump 9.

Claims

1. A laser concentration online measurement device, characterized in that, include: Laser concentration shell (1), and A flow cell (8) is fixedly installed in the middle of the laser concentration housing (1). The two ends of the flow cell (8) are respectively provided with an inlet pipe (10) and a return pipe (11). The inlet pipe (10) and the return pipe (11) are used for the inlet and outlet of the liquid to be tested in the flow cell (8). as well as A sapphire prism (7) is installed on one side wall of the flow cell (8). The large end of the sapphire prism (7) is equipped with a light source (5) and a high-resolution CCD detection sensor (3) installed on the laser concentration housing (1). The small end of the sapphire prism (7) is in contact with the liquid to be measured in the flow cell (8) during measurement. The light source (5) is used to emit light, and the high-resolution CCD detection sensor (3) is used to detect the position of the light that has been reflected back by total internal reflection.

2. The online laser concentration measurement device according to claim 1, characterized in that: An optical fiber (6) is provided between the light source (5) and the sapphire prism (7).

3. The online laser concentration measurement device according to claim 1, characterized in that, An embedded temperature sensor (4) is provided in the sapphire prism (7).

4. The online laser concentration measurement device according to claim 1, characterized in that: A gear pump (9) is installed on the liquid inlet pipe (10), and the gear pump (9) is located in the laser concentration housing (1).

5. The online laser concentration measuring device according to claim 4, characterized in that: The end of the liquid inlet pipe (10) is connected to the liquid outlet (14) via a flange (12).

6. The online laser concentration measuring device according to claim 1, characterized in that: A screen (2) is also provided on the laser concentration housing (1).

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