A flue gas sampling device

Abstract

The utility model relates to the field of flue gas sampling, especially a flue gas sampling device, including the valve body, one end of valve body is connected with the chimney lateral wall, the other end is equipped with tubular shield, the tubular shield is the flexible member, the end of tubular shield is equipped with the card holder, the card holder can be connected with sampling mechanism adaptation, the valve body communicates with the chimney, the tubular shield communicates with valve body, the tubular shield can with sampling mechanism and enter valve body, through using flue gas sampling device, in the sampling process, make chimney and outside environment isolate, avoid flue gas leakage, avoid flue gas sample sampling process being polluted by air, to ensure the personal safety of operating personnel, improved the accuracy of flue gas detection.

Description

Technical Field

[0001] This utility model relates to the field of flue gas sampling, and in particular to a flue gas sampling device. Background Technology

[0002] In the oil and gas field extraction and production process, fixed pollution source emission structures such as flues, chimneys, or exhaust stacks need to be sampled and analyzed by sampling agencies to determine the composition and content of gaseous pollutants, particulate matter, etc. in the flue gas to ensure that the flue gas emissions meet the standards. Sampling holes are pre-set on the flues, chimneys, or exhaust stacks. During normal production, the sampling holes are sealed by structures such as cover plates, pipe plugs, pipe caps, and valves. When sampling flue gas, the sampling holes need to be opened and the sampling agency is inserted into the sampling holes to take samples.

[0003] However, since there is inevitably a gap between the sampling mechanism and the sampling hole, it is impossible to achieve sealed sampling. For flue gas transported under positive pressure, there is a possibility of flue gas overflow during the sampling process, which can easily cause harm to the sampling personnel. For flue gas transported under negative pressure, a large amount of air is easily adsorbed during the sampling process, which affects the quality of the sample gas. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of existing technologies, such as the easy occurrence of flue gas leakage and contamination of flue gas samples during flue gas sampling, and to provide a flue gas sampling device.

[0005] This utility model provides a flue gas sampling device, including The valve body has one end connected to the side wall of the chimney and the other end provided with a tubular protective cover. The tubular protective cover is a flexible component, and the end of the tubular protective cover is provided with a retaining component that can be adapted and connected to the sampling mechanism. The valve body is connected to the chimney, and the tubular cover is connected to the valve body. The tubular cover can be inserted into the valve body along with the sampling mechanism.

[0006] This utility model discloses a flue gas sampling device. One end of a valve body is connected to the outer wall of a chimney, fixing the valve body to the chimney and establishing communication between the valve body and the chimney. When the valve body is open, a sampling mechanism can be inserted into the chimney through the valve body. When the valve body is closed, flue gas is prevented from overflowing from the valve body, thus preventing flue gas leakage. A tubular protective cover is installed at the end of the valve body away from the chimney, communicating with the valve body. A retaining member is installed at the end of the tubular protective cover section, allowing the sampling mechanism to be held in place. The sampling mechanism is connected to the retaining member through a fitting mechanism, thereby... The gap between the sealing sampling mechanism and the clamping component is prevented from leaking flue gas. The tubular shroud is a flexible component, allowing the sampling mechanism to carry the shroud through the valve body when it extends into the chimney. During flue gas sampling, the sampling mechanism is first connected to the clamping component, then the valve body is opened, allowing the sampling mechanism to extend into the valve body and reach the chimney for sampling. After sampling, the sampling mechanism is removed from the valve body, the valve body is closed, and then the sampling mechanism is separated from the clamping component, reducing flue gas leakage and preventing contamination of the sampled flue gas.

[0007] Preferably, the tubular cover has a connector at one end away from the retaining member, and the connector is adapted to be connected to the valve body.

[0008] The connector is adapted to the valve body, allowing the sampling mechanism to pass through the connector and enter the valve body; the connector allows the tubular cover to be detachably connected to the valve body, and different tubular covers can be replaced by removing the connector to adapt to different specifications of sampling mechanisms.

[0009] Preferably, the connector is a cylindrical structure, and the end of the tubular cover is sleeved on the connector; the connector has a connection channel, one end of which is connected to the tubular cover and the other end is connected to the valve body.

[0010] The sampling mechanism passes through the tubular protective cover, connecting channel and valve body in sequence to enter the chimney to sample the flue gas.

[0011] Preferably, the diameter of the connecting channel is greater than or equal to the minimum passage diameter of the valve body.

[0012] It makes it easier for the sampling agency to carry the tubular protective cover through the valve body.

[0013] Preferably, the tubular protective cover is a rubber structural component, and the minimum passage radius of the valve body is greater than the sum of the thickness of the tubular protective cover and the radius of the sampling mechanism.

[0014] It makes it easier for the sampling agency to carry the tubular protective cover through the valve body, and the rubber structural components can better ensure the sealing and prevent flue gas leakage.

[0015] Preferably, the retaining member and the tubular protective cover are integrally formed structural components.

[0016] Ensure the seal between the clamping component and the tubular protective cover to prevent smoke leakage.

[0017] Preferably, the holding member includes an annular structure, the size of which is adapted to the sampling mechanism, and the annular structure can be held onto the sampling mechanism.

[0018] The annular structural component can be held in place on the sampling mechanism. By adapting the annular structural component to the annular groove provided on the sampling mechanism, the sampling mechanism and the holding component are prevented from becoming loose. Preferably, the valve body is provided with an air injection device, which is connected to the valve body.

[0019] After sampling is completed, compressed air is injected into the valve body to dilute the flue gas inside the valve body and tubular shroud, thereby reducing flue gas leakage. Preferably, the gas injection device includes a gas injection pipe and a compressor, the gas injection pipe is connected to the compressor, and the gas injection pipe is connected to the valve body.

[0020] Gas is injected into the valve body by a compressor, so that the residual flue gas in the valve body and tubular cover is flushed into the chimney by compressed air, reducing flue gas leakage when operators remove the sampling device.

[0021] Preferably, the valve body is provided with an air injection connector, which is located on the side of the valve body away from the tubular protective cover.

[0022] Gas enters the valve body from the side closest to the chimney, causing the residual flue gas in the valve body and tubular shroud to rush into the chimney. Compressed air is continuously injected. After the compressed air is continuously injected for a period of time, the valve body is closed and then the compressor is turned off. This ensures that the flue gas concentration in the tubular shroud is maintained at a low level before the valve body is closed, thereby reducing flue gas leakage.

[0023] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model discloses a flue gas sampling device. One end of a valve body is connected to the outer wall of a chimney, fixing the valve body to the chimney and establishing communication between the valve body and the chimney. When the valve body is open, a sampling mechanism can be inserted into the chimney through the valve body. When the valve body is closed, flue gas is prevented from overflowing from the valve body, thus preventing flue gas leakage. A tubular protective cover is installed at the end of the valve body away from the chimney, communicating with the valve body. A retaining member is installed at the end of the tubular protective cover section, allowing the sampling mechanism to be held in place. The sampling mechanism is adapted to the retaining member, thereby sealing the gap between the sampling mechanism and the retaining member to prevent flue gas leakage. The tubular protective cover is a flexible component, allowing the sampling mechanism to carry the tubular protective cover through the valve body when it extends into the chimney. When sampling flue gas, the sampling mechanism is first connected to the holding component. Then, the valve body is opened, and the sampling mechanism extends into the valve body, allowing it to reach the chimney for flue gas sampling. After sampling, the sampling mechanism is removed from the valve body, the valve body is closed, and the sampling mechanism is then separated from the holding component. This reduces flue gas leakage and prevents contamination of the sampled flue gas. This invention provides a flue gas sampling device that isolates the chimney from the external environment during sampling, preventing large-scale flue gas leakage and air contamination of the sampled flue gas. This ensures the safety of personnel and improves the accuracy of flue gas detection, demonstrating significant economic and practical value. Attached image description: Figure 1 This is a schematic diagram of the structure of a flue gas sampling device according to the present invention; Figure 2 This is a schematic diagram of the structure of the retaining component of this utility model; Figure 3 This is a schematic diagram illustrating the usage of a flue gas sampling device according to the present invention. Figure 4 This is a schematic diagram of the structure of a flue gas sampling device according to Example 1; Figure 5 This is a schematic diagram of the gas injection channel of a flue gas sampling device according to Example 1.

[0024] Marked in the image: 1-Valve body, 2-Tube-shaped cover, 3-Clamping element, 4-Connector, 41-Flange, 42-Cylinder, 43-Connecting channel, 5-Injection device, 51-Injection pipe, 52-Compressor, 6-Injection channel, 7-Injection connector, 100-Chimney, 101-Sampling mechanism. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to specific embodiments. However, it should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0026] Unless otherwise specified, the use of terms such as "upper," "lower," "left," "right," "center," "inner," and "outer" to indicate orientation or positional relationships in the description of specific embodiments of this utility model is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product / equipment / device is typically placed during use. These terms are merely for the purpose of facilitating the description of the utility model solution or simplifying the description in specific embodiments, enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on this utility model.

[0027] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," and "parallel" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, or parallel, but rather that it can be slightly tilted or have a deviation. For example, "horizontal" merely means that its direction is more horizontal relative to "vertical," not that the structure must be completely horizontal, but can be slightly tilted. Alternatively, it can be simplified to mean that the corresponding device / component / element, when set in a "horizontal," "vertical," "suspended," or "parallel" direction, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the present invention.

[0028] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing between identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.

[0029] Furthermore, in the description of the embodiments of this utility model, "several", "multiple", and "several" represent at least two. The number can be any number, such as two, three, four, five, six, seven, eight, or nine, and can even exceed nine.

[0030] Furthermore, in the description of the technical solution of this utility model, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "equipped with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to common connection methods in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.

[0031] Example 1 like Figures 1-5 As shown, a flue gas sampling device includes... Valve body 1, one end of which is connected to the side wall of chimney 100 and the other end is provided with tubular cover 2. The tubular cover 2 is a flexible component and the end of the tubular cover 2 is provided with a retaining component 3. The retaining component 3 can be adapted and connected to the sampling mechanism 101. The valve body 1 is connected to the chimney 100, and the tubular cover 2 is connected to the valve body 1. The tubular cover 2 can be inserted into the valve body 1 along with the sampling mechanism 101.

[0032] One end of the valve body 1 is connected to the outer wall of the chimney 100, fixing the valve body 1 to the chimney 100 and establishing communication between the valve body 1 and the chimney 100. When the valve body 1 is open, the sampling mechanism 101 can be fed into the chimney 100 through the valve body 1. When the valve body 1 is closed, it prevents flue gas from overflowing from the valve body 1, thus preventing flue gas leakage. A tubular cover 2 is provided at the end of the valve body 1 away from the chimney 100, communicating with the valve body 1. A retaining member 3 is provided at the end of the tubular cover 2, allowing the sampling mechanism 101 to be held in place by the retaining member 3. The sampling mechanism 101 is sealed by the fitting connection between the sampling mechanism 101 and the retaining member 3. The gap between the sampling mechanism 101 and the retaining member 3 prevents flue gas leakage; the tubular cover 2 is a flexible component, and when the sampling mechanism 101 extends into the chimney 100, the sampling mechanism 101 can carry the tubular cover 2 through the valve body 1; when sampling flue gas, the sampling mechanism 101 is first connected to the retaining member 3, and then the valve body 1 is opened, the sampling mechanism 101 extends into the valve body 1, so that the sampling mechanism 101 passes through the valve body 1 to reach the chimney 100 for flue gas sampling; after the flue gas sampling is completed, the sampling mechanism 101 is removed from the valve body 1, the valve body 1 is closed, and then the sampling mechanism 101 is separated from the retaining member 3, which reduces flue gas leakage and avoids the sampling flue gas from being contaminated.

[0033] In one or more embodiments, the tubular cover 2 is provided with a connector 4 at the end away from the retaining member 3. The connector 4 is adapted to the valve body 1 and is detachably connected to the valve body 1. The tubular cover 2 can be replaced with a different connector 4 specification by replacing the connector 4.

[0034] In an optional embodiment, the connector 4 is a cylindrical structure with a cylindrical body 42 and a flange 41. The flange 41 is connected to the cylindrical body 42, and the diameter of the channel in the middle of the flange 41 is equal to the diameter of the channel in the cylindrical body 42. The end of the tubular cover 2 is sleeved on the connector 4. The flange 41 is connected and fixed to the valve body 1 by bolts. The tubular cover 2 is fitted on the outer wall of the cylindrical body 42. The connector 4 has a connecting channel 43, one end of which is connected to the tubular cover 2 and the other end is connected to the valve body 1, so that the sampling mechanism 101 can pass through the connector 4 and enter the valve body 1.

[0035] In an optional embodiment, the diameter of the connecting channel 43 is greater than or equal to the minimum passage diameter of the valve body 1, so that the sampling mechanism 101 can smoothly enter the valve body 1 and avoid the connector 4 from obstructing the displacement of the sampling mechanism 101.

[0036] In one or more embodiments, the tubular cover 2 is a rubber structural component with good sealing performance and the ability to deform. The minimum passage radius of the valve body 1 is greater than the sum of the thickness of the tubular cover 2 and the radius of the sampling mechanism 101, so that the sampling mechanism 101 can carry the rubber structural component through the valve body 1 and enter the chimney 100 for sampling.

[0037] In an optional embodiment, the retaining member 3 and the tubular cover 2 are integrally formed structural components. By integrally forming the retaining member 3 and the tubular cover 2, the sealing performance is ensured and the leakage of flue gas is prevented.

[0038] In one or more embodiments, the retaining member 3 is an annular structure, which is a rubber ring. The size of the annular structure is adapted to the sampling mechanism 101, so that the inner side of the annular structure is used to retain and fix the sampling mechanism 101. The diameter of the inner side of the annular structure is slightly smaller than the diameter of the sampling mechanism 101. The annular structure can be retained on the sampling mechanism 101 to seal the connection gap and ensure sealing performance.

[0039] In one or more embodiments, the valve body 1 is provided with an air injection device 5 for injecting compressed air. The air injection device 5 is connected to the valve body 1. After sampling is completed, in order to avoid the accumulation of a large amount of flue gas in the section from the valve body 1 to the tubular cover 2, and to avoid the excessively high concentration of flue gas causing personal injury to the operators when the sampling mechanism 101 is removed, compressed air is used to dilute the flue gas in the section from the valve body 1 to the tubular cover 2. In an optional embodiment, the gas injection device 5 includes a gas injection pipe 51 and a compressor 52. The gas injection pipe 51 is connected to the compressor 52 and is connected to the valve body 1. The compressor 52 can be turned on and off as needed.

[0040] In one or more embodiments, the valve body 1 is provided with an air injection connector 7, which is located on the side of the valve body 1 away from the tubular cover 2, so as to prevent abnormal pressure rise in the section from the valve body 1 to the tubular cover 2 after the valve body 1 is closed.

[0041] In an optional embodiment, the valve body 1 is provided with an inclined gas injection channel 6, which is connected to the gas injection connector 7. The gas injection channel 6 is inclined at a 45-degree angle toward one end of the tubular cover 2, which can dilute the flue gas in the tubular cover 2 more quickly.

[0042] In an optional embodiment, the valve body 1 is provided with several dispersion channels, which are connected to the air injection connector 7. The dispersion channels can disperse the airflow.

[0043] When sampling flue gas, the sampling mechanism 101 is first connected to the holding member 3. Then, the valve body 1 is opened, and the sampling mechanism 101, carrying the tubular protective cover 2, is inserted into the valve body 1 so that the sampling mechanism 101 can reach the chimney 100 through the valve body 1 to sample the flue gas. After the flue gas sampling is completed, the sampling mechanism 101 is removed from the valve body 1, the compressor 52 is turned on, and compressed air is injected. After a period of time, the sampling mechanism 101 is separated from the holding member 3 after the valve body 1 is closed, which reduces the leakage of flue gas and avoids the sampling flue gas from being contaminated.

[0044] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A flue gas sampling device, characterized in that, include Valve body (1), one end of the valve body (1) is connected to the side wall of the chimney (100) and the other end is provided with a tubular cover (2). The tubular cover (2) is a flexible part. The end of the tubular cover (2) is provided with a clamping part (3). The clamping part (3) can be adapted to and connected with the sampling mechanism (101). The valve body (1) is connected to the chimney (100), and the tubular cover (2) is connected to the valve body (1). The tubular cover (2) can be inserted into the valve body (1) along with the sampling mechanism (101).

2. The flue gas sampling device according to claim 1, characterized in that, The tubular cover (2) has a connector (4) at one end away from the retaining member (3), and the connector (4) is adapted to be connected to the valve body (1).

3. The flue gas sampling device according to claim 2, characterized in that, The connector (4) is a cylindrical structure, and the end of the tubular cover (2) is sleeved on the connector (4); the connector (4) has a connection channel (43), one end of the connection channel (43) is connected to the tubular cover (2), and the other end is connected to the valve body (1).

4. The flue gas sampling device according to claim 3, characterized in that, The diameter of the connecting channel (43) is greater than or equal to the minimum passage diameter of the valve body (1).

5. A flue gas sampling device according to claim 1, characterized in that, The tubular shield (2) is a rubber structural component, and the minimum passage radius of the valve body (1) is greater than the sum of the thickness of the tubular shield (2) and the radius of the sampling mechanism (101).

6. A flue gas sampling device according to claim 5, characterized in that, The retaining member (3) and the tubular protective cover (2) are integrally formed structural components.

7. The flue gas sampling device according to claim 1, characterized in that, The holding member (3) includes an annular structure, the size of which is adapted to the sampling mechanism (101), and the annular structure can be held on the sampling mechanism (101).

8. A flue gas sampling device according to claim 1, characterized in that, The valve body (1) is provided with an air injection device (5), which is connected to the valve body (1).

9. A flue gas sampling device according to claim 8, characterized in that, The gas injection device (5) includes a gas injection pipe (51) and a compressor (52). The gas injection pipe (51) is connected to the compressor (52), and the gas injection pipe (51) is connected to the valve body (1).

10. A flue gas sampling device according to any one of claims 1-9, characterized in that, The valve body (1) is provided with an air injection connector (7), which is located on the side of the valve body (1) away from the tubular cover (2).

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