Flue gas filtering device and flue gas sampling system

Abstract

The present application belongs to the technical field of pollutant monitoring device, and particularly relates to a flue gas filtering device and a flue gas sampling system, the flue gas filtering device comprising a first dust removal assembly, a sampling tube and a second dust removal assembly, the first dust removal assembly having an inlet and an outlet, the inlet being adapted to pass into flue gas, the sampling tube being in communication with the first dust removal assembly, and the connection between the sampling tube and the first dust removal assembly being located between the inlet and the outlet, the second dust removal assembly being arranged in the sampling tube, the second dust removal assembly comprising a rotating shaft and a plurality of blades, the plurality of blades being sleeved on the rotating shaft, the rotating shaft being pivotally connected with the sampling tube, the sampling tube having a dust storage groove therein, the dust storage groove being located below the second dust removal assembly and being in communication with the sampling tube. The flue gas filtering device can reduce the fly ash particles in the flue gas and improve the accuracy of the flue gas detection system.

Description

Technical Field

[0001] This invention belongs to the technical field of pollutant monitoring devices, specifically relating to a flue gas filtration device and a flue gas sampling system. Background Technology

[0002] The accuracy of online mercury monitoring equipment is easily affected by dust particles in flue gas. The adsorption and oxidation of gaseous mercury by the active components on the surface of dust particles will cause changes in the form of mercury in flue gas. Dust particles in flue gas entering the mercury detection module will also affect the accuracy of the mercury analyzer. Summary of the Invention

[0003] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, embodiments of this invention provide a flue gas filtration device that can reduce fly ash particles in flue gas and improve the accuracy of flue gas detection systems.

[0004] The flue gas filtration device of this invention includes: a first dust removal component having an inlet and an outlet, the inlet being adapted to allow flue gas to pass through; a sampling tube and a second dust removal component, the sampling tube communicating with the first dust removal component, and the connection between the sampling tube and the first dust removal component being located between the inlet and the outlet; the second dust removal component being disposed inside the sampling tube; the second dust removal component including a rotating shaft and a plurality of blades, the plurality of blades being sleeved on the rotating shaft; the rotating shaft being pivotally connected to the sampling tube; the sampling tube having a dust storage tank located below the second dust removal component; and the dust storage tank communicating with the sampling tube.

[0005] The flue gas filtration device of the present invention can reduce fly ash particles in flue gas and improve the accuracy of flue gas detection system.

[0006] In some embodiments, the sampling tube includes a first section and a second section, the inlet of the first section is connected to the first dust removal component, the radial dimension of the end of the first section away from the first dust removal component gradually decreases in the direction away from the first dust removal component, and the inlet of the second section is connected to the outlet of the first section.

[0007] In some embodiments, the radial dimension of the second segment near one end of the first segment gradually increases in the direction adjacent to the first segment to form a dust storage trough.

[0008] In some embodiments, on the longitudinal section of the sampling tube, the side end face of the dust storage tank adjacent to the first segment is an inclined surface extending toward the first segment.

[0009] In some embodiments, the first dust removal component further includes a third segment, which is connected to the end of the second segment away from the first segment, and a preset angle is provided between the third segment and the second segment.

[0010] In some embodiments, the second dust removal component further includes a guide vane disposed between the second section and the third section, and the guide vane extends away from the second section in the direction of flue gas flow.

[0011] In some embodiments, the first dust removal assembly includes a housing and a filter element, the housing having a receiving cavity, the filter element being disposed within the receiving cavity, and the housing inlet being adapted to allow flue gas to pass through.

[0012] In some embodiments, the filter element component and the housing have a preset gap A, where 1mm ≤ A ≤ 3mm.

[0013] In some embodiments, the filter element component is made of an AlCrNi alloy.

[0014] The flue gas sampling system of this invention includes: a flue gas filtration device, wherein the flue gas filtration device is any of the flue gas filtration devices described above; and a mercury analyzer connected to the flue gas filtration device to analyze the flue gas delivered by the flue gas filtration device.

[0015] The flue gas sampling system of the present invention, using the above-mentioned flue gas filtration device, can reduce fly ash particles in the flue gas and improve the accuracy of the flue gas detection system. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a flue gas filtration device according to an embodiment of the present invention.

[0017] Figure 2 yes Figure 1 A schematic diagram of the second dust removal component.

[0018] Figure label:

[0019] Sampling tube 1, first section 11, second section 12, third section 13, dust storage tank 14,

[0020] First dust removal component 2, housing 21, filter element component 22.

[0021] Second dust removal component 3, rotating shaft 31, blade 32, guide plate 33, connector 34. Detailed Implementation

[0022] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0023] like Figure 1 and Figure 2 As shown, the flue gas filtration device of this embodiment includes a first dust removal component 2, a sampling tube 1, and a second dust removal component 3. The first dust removal component 2 has an inlet and an outlet. The inlet is suitable for introducing flue gas. The sampling tube 1 is connected to the first dust removal component 2, and the connection between the sampling tube 1 and the first dust removal component 2 is located between the inlet and the outlet. The second dust removal component 3 is disposed inside the sampling tube 1. The second dust removal component 3 includes a rotating shaft 31 and a plurality of blades 32. The plurality of blades 32 are sleeved on the rotating shaft 31. The rotating shaft 31 is pivotally connected to the sampling tube 1. The sampling tube 1 has a dust storage tank 14, which is located below the second dust removal component 3 and is connected to the sampling tube 1.

[0024] Specifically, such as Figure 1 and Figure 2 As shown, the first dust removal component 2 extends left and right, with an inlet at the left end and an outlet at the right end. The inlet of the first dust removal component 2 is suitable for introducing flue gas.

[0025] The inlet of the sampling tube 1 is connected to the first dust removal component 2. The connection between the sampling tube 1 and the first dust removal component 2 is located between the inlet and outlet of the first dust removal component 2. The first dust removal component 2 is suitable for filtering flue gas. The rotating shaft 31 is pivotally connected to the inner wall of the sampling tube 1. Multiple blades 32 are sleeved on the lower end of the rotating shaft 31. When the flue gas enters the sampling tube 1, the flow of the flue gas will cause the blades 32 to rotate. The dust particles in the flue gas will undergo centrifugal motion, and then the dust particles in the flue gas will be thrown into the dust storage tank 14. The dust removal tank is located below the second dust removal component 3.

[0026] Optionally, the second dust removal assembly 3 also includes a connector 34, which is arranged inside the sampling tube 1 and connected to the inner wall of the sampling tube 1. The connector 34 is pivotally connected to the end of the rotating shaft 31 away from the blade 32.

[0027] The flue gas filtration device of this invention can filter dust particles in flue gas by setting a first dust removal component 2. By setting a second dust removal component 3 and a dust storage tank 14 in the sampling tube 1, the dust particles in the flue gas are removed again. By using a rotating shaft 31 and multiple blades 32, the dust particles in the flue gas are thrown into the dust storage tank 14 under the action of gravity and centrifugal force, thereby reducing the dust particles in the flue gas and improving the accuracy of the flue gas detection system.

[0028] In some embodiments, the sampling tube 1 includes a first segment 11 and a second segment 12. The inlet of the first segment 11 is connected to the first dust removal component 2. The radial dimension of the end of the first segment 11 away from the first dust removal component 2 gradually decreases in the direction away from the first dust removal component 2. The inlet of the second segment 12 is connected to the outlet of the first segment 11.

[0029] Specifically, such as Figure 1 and Figure 2 As shown, the first segment 11 extends in the vertical direction, and the second segment 12 extends in the vertical direction. The lower end of the first segment 11 is connected to the first dust removal component 2. The flue gas in the first dust removal component 2 is suitable to enter the first segment 11. The radial dimension of the upper end of the first segment 11 gradually decreases from top to bottom to increase the flue gas flow rate. Thus, when the flue gas flows, the rotation speed of the blade 32 can be increased, thereby increasing the centrifugal force of the dust particles in the flue gas. This causes the dust particles in the flue gas to be thrown out, further reducing the dust particles in the flue gas and improving the stability and safety of the flue gas filtration device.

[0030] Furthermore, the radial dimension of the end of the second segment 12 adjacent to the first segment 11 gradually increases along the direction adjacent to the first segment 11 to form a dust storage tank 14. The sampling tube 1 is also provided with a dust guide hole, the inlet of which is connected to the lower end of the dust storage tank 14. The dust guide hole extends downward, so that when enough dust particles accumulate in the dust storage tank 14, the dust particles can be removed through the dust guide hole. The upper end of the first segment 11 is connected to the lower end of the second segment 12 to form a dust storage tank 14, and the radial dimension of the second end gradually increases from top to bottom, thereby increasing the dust storage space of the dust storage tank 14 and improving the stability and safety of the flue gas filtration device.

[0031] In some embodiments, on the longitudinal section of the sampling tube 1, the side end face of the dust storage tank 14 adjacent to the first segment 11 is an inclined surface extending toward the first segment 11.

[0032] Specifically, such as Figure 1 and Figure 2 As shown, on the longitudinal section of the sampling tube 1, the side end of the dust storage tank 14 adjacent to the first section 11 is inclined downwards. As a result, when dust particles in the flue gas enter the dust storage tank 14, they will move downwards under the action of gravity, preventing the dust particles from re-entering the flue gas, thus improving the dust removal effect of the second dust removal component 3 and improving the stability and safety of the flue gas filtration device.

[0033] In some embodiments, the first dust removal component further includes a third segment 13, which is connected to the end of the second segment 12 away from the first segment 11, and a preset angle is provided between the third segment 13 and the second segment 12.

[0034] Specifically, such as Figure 1 and Figure 2As shown, the third section 13 extends in the left and right direction. When the flue gas enters the third section 13 from the second section 12, since there is a preset angle between the third section 13 and the second section 12, for example, the preset angle is 90°, after the flue gas dust particles collide with the third section 13, some dust particles will be downward under the reaction force of gravity and impact force. Then, the blade 32 will once again make the dust particles in the flue gas centrifugal motion, increasing the dust removal effect of the second dust removal component 3, thereby improving the stability and safety of the flue gas filtration device.

[0035] Optionally, the second dust removal component also includes a guide plate 33, which is arranged between the second section 12 and the third section 13, and extends away from the second section 12 in the direction of flue gas flow. For example, the guide plate 33 is an arc-shaped plate that bulges upward to avoid generating airflow vortices during flue gas flow. Alternatively, the guide plate 33 can be a straight plate with its height gradually increasing from left to right in the vertical direction to avoid generating airflow vortices during flue gas flow, thereby avoiding a reduction in the dust removal effect of the second dust removal component 3 and improving the stability and safety of the flue gas filtration device.

[0036] In some embodiments, the first dust removal assembly 2 includes a housing 21 and a filter element 22. The housing 21 has a receiving cavity, the filter element 22 is arranged in the receiving cavity, and the inlet of the housing 21 is adapted to allow flue gas to pass through.

[0037] Specifically, such as Figure 1 and Figure 2 As shown, the housing 21 extends left and right, and the filter element component 22 extends left and right. The dimension of the filter element component 22 in the left and right direction is smaller than that of the housing 21 in the left and right direction. The housing 21 has a receiving cavity, and the filter element component 22 is arranged in the receiving cavity. The filter element component 22 also has a first through hole, which penetrates the filter element component 22 in the left and right direction. This prevents the pressure of the flue gas at the outlet of the housing 21 from dropping due to filtration by the filter element component 22, thereby improving the stability and safety of the flue gas filtration device.

[0038] Furthermore, the filter element component 22 and the housing 21 have a preset gap A, where 1mm ≤ A ≤ 3mm. For example, the preset gap A between the outer peripheral surface of the filter element component 22 and the inner wall of the housing 21 is 1mm ≤ A ≤ 3mm. For instance, the size of A can be 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2.0mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, or 3.0mm. The size of the preset gap between the filter element component 22 and the housing 21 can be adjusted according to different usage environments to improve the applicability of the flue gas filtration device.

[0039] Optionally, the filter element component 22 is made of an AlCrNi alloy, which has a weaker adsorption effect on mercury, thereby avoiding the impact of mercury adsorption on the monitoring of the flue gas sampling system during filtration. Alternatively, the filter element component 22 can be made of other existing materials.

[0040] Optionally, the filter element component 22 can be a corrugated filter element, or the filter element component 22 can be other existing filter elements, such as a corrugated filter element.

[0041] The flue gas sampling system of this invention includes a flue gas filtration device and a mercury analyzer. The flue gas filtration device is any of the flue gas filtration devices described above, and the mercury analyzer is connected to the flue gas filtration device to analyze the flue gas delivered by the flue gas filtration device.

[0042] Specifically, such as Figure 1 and Figure 2 As shown, the outlet of the flue gas filtration device is connected to the inlet of the mercury analyzer, that is, the outlet of the third section 13 is connected to the inlet of the mercury analyzer. The mercury analyzer is suitable for analyzing the mercury content in flue gas.

[0043] The flue gas sampling system of this invention, by employing the above-mentioned flue gas filtration device, can remove dust particles from the flue gas, avoiding excessive dust particles from affecting the mercury in the flue gas, thereby improving the detection accuracy of the flue gas sampling system.

[0044] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0045] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0046] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0047] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0048] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0049] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A flue gas filtration device, characterized in that, include: A first dust removal component, the first dust removal component having an inlet and an outlet, the inlet being adapted to allow flue gas to pass through; A sampling tube and a second dust removal component are provided. The sampling tube is connected to the first dust removal component, and the connection between the sampling tube and the first dust removal component is located between the inlet and the outlet. The second dust removal component is disposed inside the sampling tube and includes a rotating shaft and multiple blades. The multiple blades are sleeved on the rotating shaft, and the rotating shaft is pivotally connected to the sampling tube. The sampling tube has a dust storage tank located below the second dust removal component and is connected to the sampling tube. The sampling tube includes a first section and a second section. The inlet of the first section is connected to the first dust removal component. The radial dimension of the end of the first section away from the first dust removal component gradually decreases in the direction away from the first dust removal component. The inlet of the second section is connected to the outlet of the first section. The radial dimension of the second segment near the end of the first segment gradually increases in the direction adjacent to the first segment to form a dust storage trough.

2. The flue gas filtration device according to claim 1, characterized in that, On the longitudinal section of the sampling tube, the side end face of the dust storage tank adjacent to the first section is an inclined surface extending toward the first section.

3. The flue gas filtration device according to claim 1, characterized in that, The first dust removal component also includes a third section, which is connected to the end of the second section away from the first section, and a preset angle is provided between the third section and the second section.

4. The flue gas filtration device according to claim 3, characterized in that, The second dust removal assembly further includes a guide vane, which is arranged between the second section and the third section, and extends away from the second section in the direction of flue gas flow.

5. The flue gas filtration device according to claim 1, characterized in that, The first dust removal assembly includes a housing and a filter element. The housing has a receiving cavity, the filter element is arranged in the receiving cavity, and the housing inlet is adapted to allow flue gas to pass through.

6. The flue gas filtration device according to claim 5, characterized in that, The filter element component and the housing have a preset gap A, where 1mm≤A≤3mm.

7. The flue gas filtration device according to claim 5, characterized in that, The filter element component is made of an AlCrNi alloy.

8. A flue gas sampling system, characterized in that, include; A flue gas filtration device, wherein the flue gas filtration device is the flue gas filtration device according to any one of claims 1-7; a mercury analyzer, wherein the mercury analyzer is connected to the flue gas filtration device to analyze the flue gas delivered by the flue gas filtration device.

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