A dynamic reflux probe and continuous sampling system

Abstract

This utility model belongs to the field of gas sampling and pretreatment technology, specifically disclosing a dynamic reflux probe, including a first chamber, a second chamber, and a third chamber arranged sequentially from bottom to top; the first chamber is connected to the second chamber, a first filter and a first buffer assembly are installed between the first and second chambers, and the third chamber is connected to the second chamber through several pipes; it also includes a cooling chamber disposed between the second and third chambers, with at least some pipes disposed in the cooling chamber to cool the gas sample flowing in the pipes; the lower end face of the first chamber has a drain port, and the side end face has an air inlet; the upper end face of the third chamber has an exhaust port. The probe of this utility model reduces the pressure of the collected gas sample and effectively removes moisture and oil from the gas sample, thereby extending the service life of the probe. This utility model also discloses a continuous sampling system using a dynamic reflux probe.

Description

Technical Field

[0001] This utility model belongs to the field of gas sampling and pretreatment technology, specifically relating to a dynamic reflux probe and a continuous sampling system. Background Technology

[0002] Driven by the global energy transition and the national "dual-carbon" strategic goals, China's modern coal chemical industry explicitly encourages the use of advanced technologies to comprehensively improve industrial energy efficiency, enhance safety and environmental protection, and increase the level of intelligence. In this industrial transformation process, key projects such as coal-to-natural gas play a crucial role. For these projects, real-time and precise monitoring of the production process is the core link in ensuring the inherent safety of the equipment, optimizing operational efficiency, reducing energy and material consumption, and achieving clean and low-carbon production. Only through accurate monitoring can potential problems in the production process be identified in a timely manner, allowing for effective measures to be taken to solve them and ensuring the stable, efficient, and green operation of the entire production process.

[0003] During monitoring, the gas samples collected from the coal chemical gasifier outlet exhibit extremely complex characteristics (pressures reaching 4.3 MPa, far exceeding atmospheric pressure; temperatures reaching 180°C; high humidity with a water content exceeding 22%; and also containing large amounts of tar, ammonium salts, and solid impurities), posing significant challenges to gas sample collection and analysis. Current technologies typically employ probes for gas sample collection, and these probes are equipped with initial dust, water, and oil removal functions to reduce blockages in subsequent gas path detection and ensure the normal operation of the detection equipment.

[0004] However, the probes currently in use have revealed some problems that urgently need to be solved in practical applications. When high-pressure and high-temperature gas samples flow through probes of limited length, due to the limitations of the probe's own structure and processing capacity, and because cavitation easily occurs on the equipment under high pressure, the probe cannot effectively remove moisture and oil from the gas sample, which will reduce the probe's service life. Moreover, some moisture and oil will still enter the subsequent detection system with the gas sample, which may not only affect the accuracy of the detection results, but also require frequent maintenance of the detection system. Utility Model Content

[0005] The purpose of this invention is to provide a dynamic reflux probe that reduces the pressure of gas sample collection, thereby reducing equipment cavitation, effectively removing moisture and oil from the gas sample, and extending the service life of the probe and other equipment.

[0006] The purpose of this utility model is achieved through the following technical solution: a dynamic reflux probe is provided, comprising a first chamber, a second chamber, and a third chamber arranged sequentially from bottom to top; the first chamber is connected to the second chamber, a first filter and a first buffer assembly are installed between the first chamber and the second chamber, and the third chamber is connected to the second chamber through several pipes; it also includes a cooling chamber disposed between the second chamber and the third chamber, with at least some pipes disposed in the cooling chamber to cool the gas sample flowing in the pipes; the lower end face of the first chamber is provided with a drain port, and the side end face is provided with an air inlet; the upper end face of the third chamber is provided with an exhaust port.

[0007] The gas sample enters the first chamber, which provides a buffer space for the sample, replacing the conventional probe that directly enters the filter. The first buffer assembly effectively reduces the velocity, pressure peak, or flow rate of the gas sample, achieving a throttling and resistance effect. The gas sample passes through the first filter to remove larger impurities. The pre-filtered gas sample then enters the second chamber and flows into the pipeline. The cooling chamber cools the gas sample flowing in the pipeline, causing moisture and oil to precipitate out and flow out of the pipeline under gravity. The gas sample, after pre-filtration and removal of water and oil, flows through the exhaust port into the detection equipment.

[0008] Preferably, the inner wall diameter of the second chamber is larger than the inner wall diameter of the first chamber.

[0009] Preferably, an inlet and an outlet are provided on the outer side of the cooling chamber; the inlet and outlet are staggered.

[0010] Preferably, one of the pipes is located at the center of the cooling chamber, and the remaining pipes are evenly spaced along the circumference of the cooling chamber.

[0011] Preferably, the third chamber is provided with a second buffer assembly.

[0012] Due to the adoption of the above technical solution, this utility model has the following advantages: The dynamic reflux probe effectively reduces the velocity, pressure peak, or flow rate of the high-pressure gas sample through the first chamber, the second chamber, and the first buffer assembly, thereby reducing cavitation of the dynamic reflux probe. Through the first filter and the cooling chamber, it initially removes impurities such as moisture, oil, and dust from the gas sample, extending the service life of the probe and other equipment.

[0013] Another objective of this invention is to provide a continuous sampling system for uninterrupted sampling of the outlet gas from a coal chemical gasifier.

[0014] Another objective of this utility model is achieved through such a technical solution, specifically providing a continuous sampling system, including the two sets of dynamic reflux probes mentioned above, as well as a pre-processing component and a post-processing component; one end of the pre-processing component is connected to the exhaust port of the dynamic reflux probe, and the other end is connected to the post-processing component.

[0015] Preferably, the pre-treatment component includes a water washer, a first vortex tube cooler, and a second filter; the dynamic reflux probe is connected to the water washer; one end of the first vortex tube cooler is connected to both sets of water washer, and the other end is connected to the second filter; the other end of the second filter is connected to the post-treatment component.

[0016] Preferably, the post-treatment assembly includes an electric heating tube, a second vortex tube cooler, a third filter, a drying tube, and a fourth filter; one end of the electric heating tube is connected to the second filter, and the other end is connected to the second vortex tube cooler; one end of the third filter is connected to the second vortex tube cooler, and the other end is connected to the drying tube; one end of the fourth filter is connected to the drying tube, and the other end is connected to the input end of the detection device.

[0017] Due to the adoption of the above technical solution, this utility model has the following advantages: When one set of dynamic reflux probes malfunctions, another set of dynamic reflux probes can continue to be used, thereby enabling uninterrupted continuous sampling of the gas outlet gas of the coal chemical gasifier. Furthermore, the gas sample is de-dusted, dehydrated, and de-oiled through the pre-treatment and post-treatment components, reducing the impact of the gas sample on the equipment and lowering the maintenance frequency of the detection system. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of this utility model, the accompanying drawings used in the specific embodiments will be briefly introduced below. In all the drawings, the elements or parts are not necessarily drawn to scale.

[0019] Figure 1 This is a schematic diagram of the structure of a dynamic reflux probe according to the present invention; Figure 2 This is a schematic diagram of the pre-processing components. Figure 3 This is a schematic diagram of the subsequent preprocessing components; Figure 4 This is a schematic diagram of the first buffer component.

[0020] Figure label: 1-First chamber, 11-First filter, 12-First buffer assembly, 121-Circular hole, 13-Drain port, 14-Air inlet; 2-Second chamber, 21-Pipe; 3-Cooling chamber, 31-Inlet, 32-Outlet; 4-Third chamber; 41-Exhaust port; 42-Second buffer assembly; 5-Pre-treatment component, 51-Water washer, 52-First vortex tube cooler, 53-Second filter 6-Post-stage pretreatment component, 61-Electric heating tube, 62-Second vortex tube cooler, 63-Third filter, 64-Drying tube, 65-Fourth filter. Detailed Implementation

[0021] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0022] Please see Figure 1 and Figure 4A dynamic reflux probe comprises a first chamber 1, a second chamber 2, and a third chamber 4 arranged sequentially from bottom to top; the first chamber 1 is connected to the second chamber 2, a first filter 11 and a first buffer assembly 12 are installed between the first chamber 1 and the second chamber 2, and the third chamber 4 is connected to the second chamber 2 through several pipes 21; it also includes a cooling chamber 3 disposed between the second chamber 2 and the third chamber 4, at least some of the pipes 21 are disposed in the cooling chamber 3 to cool the gas sample flowing in the pipes 21; the lower end face of the first chamber 1 is provided with a drain port 13, and the side end face is provided with an air inlet 14; the upper end face of the third chamber 4 is provided with an exhaust port 41. Specifically, the air inlet 14 is connected to the gasifier outlet via a first valve, and the gas sample enters the first chamber 1 from the air inlet 14; the exhaust port 41 is connected to the detection equipment via a second valve, and the discharge port 13 is connected to the discharge pipe via a third valve, used to discharge impurities in the first chamber 1. The valves can be opened or closed to connect or disconnect the components, and the flow rate can be adjusted to meet the needs of practical applications. The first chamber 1 and the second chamber 2 are connected by a flange using existing technology. The cooling chamber 3 is welded to the upper end of the second chamber 2, or to the lower end of the third chamber 4, or one end of the cooling chamber 3 is welded to the upper end of the second chamber 2, and the other end is welded to the lower end of the third chamber 4, or, as in this application, the second chamber 2, the cooling chamber 3, and the third chamber 4 are connected by a flange using existing technology. The first buffer assembly 12 has two sets, one set located at the upper end of the first chamber 1 and the other set located at the lower end of the second chamber 2. In this application, both sets of first buffer components 12 adopt the same structure, both consisting of regularly arranged circular holes 121 on a circular plate. The pore size, number of holes (porosity), and thickness of the circular plate are determined by actual site conditions and process requirements, and are not specifically limited in this embodiment. By changing these parameters, their buffering characteristics for specific gas pressures and flow rates can be precisely controlled. A first filter 11 is disposed between the two sets of first buffer components 12. The length of the cooling chamber 3 is greater than half the probe length, and the pipe 21 has sufficient length to allow the gas sample to flow, cool, and precipitate moisture and oil. The first filter 11 is a primary filter, mainly used to filter larger particles in the gas sample.

[0023] In use, this utility model's dynamic reflux probe first opens the first valve, allowing the gas (gas sample) from the gasifier outlet to enter the first chamber 1. The first chamber 1 provides a buffer space for the gas sample, replacing the direct entry of conventional probes into the filter. As the gas sample passes through the numerous circular holes 121 on the first buffer assembly 12, the velocity, pressure peak, or flow rate of the gas sample is effectively reduced, resulting in a throttling and resistance effect. The gas sample passes through the first filter 11 to remove larger impurities. The pre-filtered gas sample enters the second chamber 2, passes through another set of first buffer assemblies 12, and then enters the pipe 21. The cooling chamber 3 cools the gas sample flowing in the pipe 21, causing moisture and oil to precipitate out under gravity and flow out of the pipe 21. The gas then flows through the first buffer assembly 12 and the first filter 11, while water, oil, and other impurities flow out through the drain port 13. Finally, the gas sample, after pre-filtration and removal of water and oil, flows through the exhaust port 41 into the detection equipment.

[0024] This invention effectively reduces the velocity, pressure peak, or flow rate of the gas sample flow through the first chamber 1 and the first buffer assembly 12, thereby reducing probe cavitation and extending probe service life. It also employs a cooling method to condense moisture and oil from the gas sample. The condensate, passing through the first chamber 1 and the second chamber 2, washes away particulate matter and other impurities in the gas sample, thus purifying the gas sample, reducing its impact on subsequent detection systems, improving the accuracy of detection results, and reducing the maintenance frequency of the detection system.

[0025] Furthermore, the inner wall diameter of the second chamber 2 is larger than that of the first chamber 1. With this structure, when the high-pressure gas sample enters the second chamber 2, the second chamber 2 provides sufficient buffer space to further reduce the velocity and pressure peak of the gas sample flow.

[0026] Furthermore, the cooling chamber 3 is provided with an inlet 31 and an outlet 32 ​​on its outer side; the inlet 31 and outlet 32 ​​are staggered. Specifically, the inlet 31 is connected to the outlet of an external cooling device, which outputs a cooling medium, including but not limited to cold water, cold gas, and mineral oil. The inlet 31 is located at the lower end of the cooling chamber 3, and the outlet 32 ​​is located at the upper end of the cooling chamber 3. With this structure, the cooling medium that absorbs heat rises and is discharged from the bottom to the outlet 32, effectively utilizing the cooling medium. In use, the external cooling device is activated, the cooling medium enters the cooling chamber 3, the cooling medium surrounds the pipe 21, cools the gas sample, and the cooling medium is discharged from the outlet 32.

[0027] Furthermore, one pipe 21 is positioned at the axis of the cooling chamber 3, while the remaining pipes 21 are evenly spaced along the circumference of the cooling chamber 3. Specifically, in this application, both the upper and lower ends of the cooling chamber 3 are provided with mounting plates with mounting holes. The pipes 21 pass through the mounting holes and are then welded to the mounting plates. Preferably, there are nine pipes 21 in total, one of which is located at the center of the mounting plate, and the other eight are evenly spaced along the circumference of the mounting plate. This structure allows the gas sample to flow out evenly from each pipe 21, changing the original state where the gas sample has a high velocity in the middle and a slow velocity at the edges of the second chamber 2, thus contributing to a stable gas sample flow rate.

[0028] Furthermore, a second buffer assembly 42 is provided in the third chamber 4. Specifically, the second buffer assembly 42 adopts the same structure as the first buffer assembly 12.

[0029] Please see Figure 2 and Figure 3 A continuous sampling system includes two sets of the aforementioned dynamic reflux probes, as well as a pre-treatment component 5 and a post-treatment component 6. One end of the pre-treatment component 5 is connected to the exhaust port 41 of the dynamic reflux probe, and the other end is connected to the post-treatment component 6. Specifically, the system includes a PLC logic controller, which is electrically connected to both sets of dynamic reflux probes. When one set of dynamic reflux probes malfunctions, the PLC controller can automatically switch between the two sets, allowing the other set to continue operating even when one set malfunctions, thus enabling uninterrupted continuous sampling of the gas exiting the coal chemical gasifier.

[0030] Further, please refer to Figure 2The pre-treatment component 5 includes a water washer 51, a first vortex tube cooler 52, and a second filter 53. A dynamic reflux probe is connected to the water washer 51. One end of the first vortex tube cooler 52 is connected to the water washer 51, and the other end is connected to the second filter 53. The other end of the second filter 53 is connected to the post-treatment component 6. Specifically, the output end of the dynamic reflux probe is connected to an external steam generator. After the gas sample is mixed with steam, it enters the cylindrical water washer 51. Water is discharged from the lower end of the water washer 51 under gravity. The gas sample, after being thoroughly mixed with steam, not only further removes dust and oil from the gas sample but also reacts with some impurities, such as sulfur dioxide. In this application, two sets of water washer 51 are provided, with one set for each dynamic reflux probe. The purified gas sample flows from the upper end of the water washer 51 to the first vortex tube cooler 52. The first vortex tube cooler 52 adopts existing technology; in this application, the first vortex tube cooler is a model TWP-GAC120 manufactured by Chongqing Chuanghui Technology Co., Ltd. The internal temperature of the first vortex tube cooler 52 is controlled at around 10℃, and the condensed water is discharged through an automatic drain valve. After further dehydration of the gas sample by the first vortex tube cooler 52, the gas sample enters the second filter 53. The second filter 53 is a metal filter with a 3μm filter element inside for dust removal from the gas sample.

[0031] Further, please refer to Figure 3 The post-treatment component 6 includes an electric heating tube 61, a second vortex tube cooler 62, a third filter 63, a drying tube 64, and a fourth filter 65. One end of the electric heating tube 61 is connected to the second filter 63, and the other end is connected to the second vortex tube cooler 62. One end of the third filter 63 is connected to the second vortex tube cooler 62, and the other end is connected to the drying tube 64. One end of the fourth filter 65 is connected to the drying tube 64, and the other end is connected to the input terminal of the detection equipment. Specifically, the electric heating tube 61 heats the gas sample to a temperature of 120°C to ensure that the gas sample does not condense. The second vortex tube cooler 62 removes water from the gas sample, and its internal temperature is controlled at around 5°C. The condensed water is discharged through an automatic drain valve. The third filter 63 is equipped with a 2μm filter element to remove dust from the gas sample. The drying tube 64 removes water from the gas sample. The fourth filter 65 is a membrane filter with a dust filtration accuracy of 0.2μm. After processing by the above components, the gas sample meets the instrument requirements.

[0032] This invention discloses a dynamic reflux probe and a continuous sampling system. The dynamic reflux probe, through a first chamber 1, a second chamber 2, and a buffer assembly, effectively reduces the velocity, pressure peak, or flow rate of the high-pressure gas sample. A first filter 11 and a cooling chamber 3 preliminarily remove moisture, oil, and impurities from the gas sample. Two sets of dynamic reflux probes are installed, enabling continuous sampling of the gas outlet gas from a coal chemical gasifier under the monitoring of a PLC logic controller. A pre-treatment component 5 uses a water washer 51 to clean the gas sample, further removing dust, oil, and substances that react with water, reducing the impact of impurities in the gas sample on subsequent equipment and thus reducing the maintenance frequency of the detection system. A first vortex tube cooler 52, a second vortex tube cooler 62, and a drying tube 64 effectively remove moisture from the gas sample; a second filter 53, a third filter 63, and a fourth filter 65 effectively remove dust particles from the gas sample. This invention, through multi-stage dust and water removal, not only obtains gas samples that meet instrument requirements but also improves system stability and reduces the maintenance frequency of the detection system.

[0033] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific implementation method of this utility model and is not intended to limit this utility model. Any modifications, equivalent substitutions, and improvements made within the scope of the spirit of this utility model should be included within the protection scope of this utility model.

Claims

1. A dynamic reflux probe, characterized in that, include: The first chamber (1), the second chamber (2), and the third chamber (4) are arranged sequentially from bottom to top; the first chamber (1) is connected to the second chamber (2), the first filter (11) and the first buffer assembly (12) are installed between the first chamber (1) and the second chamber (2), and the third chamber (4) is connected to the second chamber (2) through several pipes (21); it also includes a cooling chamber (3) arranged between the second chamber (2) and the third chamber (4), at least some of the pipes (21) are arranged in the cooling chamber (3) to cool the gas sample flowing in the pipes (21); the lower end face of the first chamber (1) is provided with a drain port (13), and the side end face is provided with an air inlet (14); the upper end face of the third chamber (4) is provided with an exhaust port (41).

2. The dynamic reflux probe according to claim 1, characterized in that, The inner wall diameter of the second chamber (2) is greater than the inner wall diameter of the first chamber (1).

3. The dynamic reflux probe according to claim 1 or 2, characterized in that, The cooling chamber (3) has an inlet (31) and an outlet (32) on its outer side; the inlet (31) and outlet (32) are staggered.

4. The dynamic reflux probe according to claim 1 or 2, characterized in that, One of the pipes (21) is located at the center of the cooling chamber (3), and the other pipes (21) are evenly spaced along the circumference of the cooling chamber (3).

5. The dynamic reflux probe according to claim 3, characterized in that, One of the pipes (21) is located at the center of the cooling chamber (3), and the other pipes (21) are evenly spaced along the circumference of the cooling chamber (3).

6. The dynamic reflux probe according to claim 1, 2, or 5, characterized in that, The third chamber (4) is equipped with a second buffer assembly (42).

7. A continuous sampling system, characterized in that, It includes the dynamic reflux probe described in any one of the two sets of claims 1-6, and also includes a pre-processing component (5) and a post-processing component (6); one end of the pre-processing component (5) is connected to the exhaust port (41) of the dynamic reflux probe, and the other end is connected to the post-processing component (6).

8. The continuous sampling system according to claim 7, characterized in that, The pre-treatment component (5) includes a water washer (51), a first vortex tube cooler (52), and a second filter (53); the dynamic reflux probe is connected to a set of water washer (51); one end of the first vortex tube cooler (52) is connected to both sets of water washer (51), and the other end is connected to the second filter (53); the other end of the second filter (53) is connected to the post-treatment component (6).

9. The continuous sampling system according to claim 8, characterized in that, The post-treatment component (6) includes an electric heating tube (61), a second vortex tube cooler (62), a third filter (63), a drying tube (64), and a fourth filter (65); one end of the electric heating tube (61) is connected to the second filter (53), and the other end is connected to the second vortex tube cooler (62); one end of the third filter (63) is connected to the second vortex tube cooler (62), and the other end is connected to the drying tube (64); one end of the fourth filter (65) is connected to the drying tube (64), and the other end is connected to the input end of the detection device.

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