A natural gas water content monitoring device

Abstract

This utility model relates to the field of natural gas production technology and discloses a natural gas water content monitoring device, comprising: a monitoring box body, on both sides of the monitoring box body are fixedly installed with laser detection structures, the inner surface of the laser detection structures is provided with a tunable diode laser emission and reception module, the inner side of the monitoring box body is fixedly installed with a capacitive sensor module, and the outer surface of the capacitive sensor module and located in the inner cavity of the monitoring box body are provided with a hydrophobic nano-coated electrode group; non-contact measurement is achieved through the laser detection structures on both sides and the tunable diode laser emission and reception modules, and the capacitive sensor module and hydrophobic nano-coated electrode group on the inner side effectively solve the problem that traditional water dew point meters need to be disassembled and sent for inspection, realizing online real-time monitoring. At the same time, the anti-corrosion properties of the hydrophobic nano-coated electrode group avoid sensor drift and data jump caused by acidic gases.

Description

Technical Field

[0001] This utility model relates to the field of natural gas production technology, and more specifically, to a natural gas water content monitoring device. Background Technology

[0002] Natural gas refers to all gases that exist naturally in nature, including gases formed by various natural processes in the atmosphere, hydrosphere, and lithosphere (including oilfield gas, gas field gas, mud volcano gas, coalbed methane, and biogenic gas, etc.).

[0003] A natural gas water content monitoring device, such as the one disclosed in publication (announcement) number CN218974348U, includes a main component. The main component includes a second exhaust pipe, and a return assembly is installed on one side of the second exhaust pipe. The return assembly includes a return pipe, a second control valve, and a third control valve. A monitoring component is installed at one end of the second exhaust pipe, and the monitoring component includes a monitor, a display screen, an alarm light, a controller, a signal transmitter, and a buzzer. This invention monitors the water content of natural gas using a monitor. When the water content exceeds the standard, the controller closes the third control valve and opens the second control valve, allowing the natural gas to enter the return pipe for re-drying. This automates the handling of excessive water content in natural gas without manual adjustment, preventing substandard natural gas from entering subsequent processes and effectively preventing problems such as blockage of the aluminum plate fins in the cold box.

[0004] However, based on the working principle proposed in the aforementioned patent, the applicant believes that although the device can prevent the problem of aluminum plate fin blockage to a certain extent, in actual use, traditional water dew point meters need to be disassembled and sent for inspection, and cannot verify the accuracy of changes in water content online. Moreover, the sensor is easily corroded by acidic gases (such as H2S and CO2), which can lead to zero drift and data jumps, and there are certain defects in its use. Utility Model Content

[0005] To overcome the shortcomings of the existing technology, this utility model provides a natural gas water content monitoring device, which has the advantages of integrated detection and no need for sensors to directly contact acidic gases.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a natural gas water content monitoring device, comprising:

[0007] The monitoring box body has laser detection structures fixedly installed on both sides. The inner surface of the laser detection structure is provided with a tunable diode laser emission and reception module. The inner side of the monitoring box body is fixedly installed with a capacitive sensor module. The outer surface of the capacitive sensor module and located in the inner cavity of the monitoring box body are provided with a hydrophobic nano-coated electrode group.

[0008] As a preferred embodiment of this utility model, a signal processing module is fixedly installed on the top of the outer side of the laser detection structure, and a buzzer is fixedly installed on the bottom of the signal processing module.

[0009] As a preferred embodiment of this utility model, a display screen is provided on the top of the front of the monitoring box body, and a control button is provided at the bottom of the display screen.

[0010] As a preferred technical solution of this utility model, a sealing cover is movably installed on the front side of the main body of the monitoring box, and a visible transparent plate is provided on the top of the surface of the sealing cover.

[0011] As a preferred embodiment of this utility model, a movable cover plate is movably installed at the bottom of the visible transparent plate, and a pull ring is fixedly installed on the surface of the movable cover plate.

[0012] As a preferred embodiment of this utility model, a cyclone separator is fixedly installed on the back of the monitoring box body, an air transmission pipe is fixedly installed on the top of the cyclone separator, an air inlet pipe is fixedly installed on the top of the monitoring box body, the air transmission pipe is fixedly connected to the air inlet pipe, and a filter head is fixedly installed at the top of the air inlet pipe.

[0013] As a preferred embodiment of this utility model, an air outlet pipe is fixedly installed at the bottom of the monitoring box body, a handle is fixedly installed on the inner side of the air outlet pipe, a battery is provided on the inner side of the handle, and a lower cover is threaded onto the bottom of the handle.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] 1. The main body of the monitoring box of this utility model achieves non-contact measurement through the laser detection structure on both sides and the tunable diode laser emission and reception module. Combined with the capacitive sensor module and hydrophobic nano-coated electrode group on the inner side, it effectively solves the problem of traditional water dew point meters needing to be disassembled and sent for inspection, and realizes online real-time monitoring. At the same time, the anti-corrosion properties of the hydrophobic nano-coated electrode group avoid sensor drift and data jump caused by acidic gases, significantly improving the measurement accuracy and stability.

[0016] 2. This utility model achieves real-time alarm for abnormal data through the combination of signal processing module and buzzer. The display screen and control buttons provide convenient human-machine interaction. The sealed cover and transparent plate facilitate observation of the internal status. The movable cover and pull ring facilitate maintenance and operation. The cooperation of cyclone separator, gas transmission pipe, gas inlet pipe and filter head ensures gas pretreatment effect. The gas outlet pipe and handle optimize the portability of the equipment. The lower cover protects the safe use of the built-in battery. The whole device has a compact structure and complete functions, and is suitable for various natural gas transportation scenarios. Attached Figure Description

[0017] Figure 1 This is a frontal perspective three-dimensional schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a rear-view perspective view of the overall structure of this utility model;

[0019] Figure 3 This is a partial three-dimensional schematic diagram of the front structure of the monitoring box of this utility model;

[0020] Figure 4 This is a three-dimensional cross-sectional view of the back of the main structure of the monitoring box of this utility model.

[0021] In the diagram: 1. Monitoring box body; 2. Laser detection structure; 3. Tunable diode laser emission and reception module; 4. Capacitive sensor module; 5. Hydrophobic nano-coated electrode group; 6. Signal processing module; 7. Buzzer; 8. Display screen; 9. Control button; 10. Sealing cover; 11. Visible panel; 12. Movable cover; 13. Pull ring; 14. Cyclone separator; 15. Air transmission pipe; 16. Air inlet pipe; 17. Filter head; 18. Air outlet pipe; 19. Handle; 20. Lower cover. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] like Figures 1 to 4 As shown, this utility model provides a natural gas water content monitoring device, comprising:

[0024] The monitoring box body 1 has a laser detection structure 2 fixedly installed on both sides. The inner surface of the laser detection structure 2 is provided with a tunable diode laser emission and reception module 3. The inner side of the monitoring box body 1 is fixedly installed with a capacitive sensor module 4. The outer surface of the capacitive sensor module 4 and located in the inner cavity of the monitoring box body 1 is provided with a hydrophobic nano-coated electrode group 5.

[0025] The main body 1 of the monitoring box is made of high-strength, corrosion-resistant aluminum alloy. It has a double-layer heat-insulating cavity inside. The front cavity is the optical detection chamber, and the rear cavity is the electronic component chamber. The laser transmission window on the side wall is sealed with sapphire glass and coated with an anti-reflective film, with a light transmittance of over 98%. The laser detection structures 2 on both sides are fixed by flanges and have built-in laser collimation system and temperature control module. They are equipped with piezoelectric ceramic fine-tuning mechanism to achieve precise beam adjustment. The tunable diode laser emission and reception module 3 integrates a distributed feedback laser and an avalanche photodiode. The effective optical path is extended to 15 meters through the White cell reflector group. The capacitive sensor module 4 is manufactured using MEMS technology and has a silicon nitride passivation layer on the surface. The measurement circuit is based on lock-in amplification technology to achieve a sensitivity of 0.1 fF. The hydrophobic nano-coated electrode group 5 is formed by plasma deposition of fluorocarbon polymer-based composite material. The surface is constructed with a nano-pillar array structure with a contact angle of over 150°. All modules work together to achieve non-contact dual-mode detection of laser absorption spectrum and capacitance-dielectric properties, ensuring high accuracy and corrosion resistance in natural gas water content monitoring.

[0026] Among them, a signal processing module 6 is fixedly installed on the top of the outer side of the laser detection structure 2, and a buzzer 7 is fixedly installed on the bottom of the signal processing module 6.

[0027] The signal processing module 6 can process the detection data in real time, improving the reliability of the measurement results; the buzzer 7 can issue an alarm when an abnormality is detected, promptly reminding the operator.

[0028] The monitoring box body 1 has a display screen 8 on the top of the front side and a control button 9 at the bottom of the display screen 8.

[0029] The display screen 8 allows for intuitive display of test data, facilitating on-site monitoring; the control buttons 9 enable convenient parameter adjustment and function switching.

[0030] The monitoring box body 1 has a sealing cover 10 movably installed on the front side, and a visible plate 11 is provided on the top of the surface of the sealing cover 10.

[0031] The sealing cover 10 protects internal components and facilitates equipment maintenance; the transparent panel 11 allows observation of the internal working status without opening the equipment.

[0032] Among them, a movable cover plate 12 is movably installed at the bottom of the visible transparent panel 11, and a pull ring 13 is fixedly installed on the surface of the movable cover plate 12.

[0033] The movable cover 12 allows for quick opening of the equipment for maintenance or calibration; the pull ring 13 makes it easy to open the movable cover 12, improving operational convenience.

[0034] The monitoring box body 1 has a cyclone separator 14 fixedly installed on the back, an air transmission pipe 15 fixedly installed on the top of the cyclone separator 14, an air inlet pipe 16 fixedly installed on the top of the monitoring box body 1, the air transmission pipe 15 and the air inlet pipe 16 fixedly connected, and a filter head 17 fixedly installed at the top of the air inlet pipe 16.

[0035] The cyclone separator 14 removes particulate matter from the natural gas, preventing impurities from interfering with the test results. The gas transmission pipe 15 delivers the pre-treated gas to the test chamber, ensuring stable airflow. The inlet pipe 16 controls the gas flow rate and optimizes the test conditions. The filter head 17 further filters out tiny particles in the gas, improving test accuracy.

[0036] The monitoring box body 1 has an air outlet pipe 18 fixedly installed at the bottom, a handle 19 fixedly installed on the inside of the air outlet pipe 18, a battery installed on the inside of the handle 19, and a lower cover 20 threadedly installed at the bottom of the handle 19.

[0037] The exhaust pipe 18 allows for the discharge of detected gas, maintaining system pressure balance; the handle 19 facilitates carrying and installing the equipment, improving ease of use; and the lower cover 20 protects the built-in battery, ensuring a safe and stable power supply for the device.

[0038] The working principle and usage process of this utility model are as follows: The main body 1 of the monitoring box serves as the core carrier. Through the cooperation of the air inlet pipe 16 and the filter head 17, natural gas is introduced into the detection chamber after particulate impurities are removed by the cyclone separator 14. At this time, the tunable diode laser emission and reception module 3 in the laser detection structure 2 emits a specific wavelength laser based on TDLAS technology. The water molecule concentration is calculated in real time through gas absorption spectrum analysis. At the same time, the capacitive sensor module 4 monitors the changes in the dielectric properties of the gas through the hydrophobic nano-coated electrode group 5, accurately capturing trace moisture signals. After the two types of data are fused and processed by the signal processing module 6, the water content and dew point value are dynamically displayed on the display screen 8. In case of abnormality, the buzzer 7 immediately alarms. The gas that has been detected is discharged through the air outlet pipe 18. The handle 19 and the lower cover 20 ensure the portability of the equipment and the stability of the power supply. The sealing cover 10, the transparent plate 11, and the movable cover 12 work together to realize status observation and rapid maintenance. The entire device achieves high-precision online monitoring of the water content of natural gas through multimodal sensing and intelligent processing.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A natural gas water content monitoring device, characterized in that, include: The monitoring box body (1) has laser detection structures (2) fixedly installed on both sides. A tunable diode laser emission and reception module (3) is provided on the inner surface of the laser detection structure (2). A capacitive sensor module (4) is fixedly installed on the inner side of the monitoring box body (1). A hydrophobic nano-coated electrode group (5) is provided on the outer surface of the capacitive sensor module (4) and located in the inner cavity of the monitoring box body (1).

2. The natural gas water content monitoring device according to claim 1, characterized in that: A signal processing module (6) is fixedly installed on the top of the outer side of the laser detection structure (2), and a buzzer (7) is fixedly installed on the bottom of the signal processing module (6).

3. The natural gas water content monitoring device according to claim 1, characterized in that: The monitoring box body (1) has a display screen (8) on the top of the front side and a control button (9) on the bottom of the display screen (8).

4. The natural gas water content monitoring device according to claim 1, characterized in that: A sealing cover (10) is movably installed on the front side of the main body (1) of the monitoring box, and a visible transparent plate (11) is provided on the top of the surface of the sealing cover (10).

5. A natural gas water content monitoring device according to claim 4, characterized in that: A movable cover plate (12) is movably installed at the bottom of the visible transparent panel (11), and a pull ring (13) is fixedly installed on the surface of the movable cover plate (12).

6. The natural gas water content monitoring device according to claim 1, characterized in that: A cyclone separator (14) is fixedly installed on the back of the main body (1) of the monitoring box. An air transmission pipe (15) is fixedly installed on the top of the cyclone separator (14). An air inlet pipe (16) is fixedly installed on the top of the main body (1) of the monitoring box. The air transmission pipe (15) is fixedly connected to the air inlet pipe (16). A filter head (17) is fixedly installed at the top of the air inlet pipe (16).

7. A natural gas water content monitoring device according to claim 1, characterized in that: An air outlet pipe (18) is fixedly installed at the bottom of the main body (1) of the monitoring box. A handle (19) is fixedly installed on the inner side of the air outlet pipe (18). A battery is provided on the inner side of the handle (19). A lower cover (20) is threaded onto the bottom of the handle (19).

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