Flue gas mixing sampling device

Abstract

The utility model provides a kind of flue gas mixed sampling device, including multiple sampling components, each sampling component includes sampling tube;Multiple adjustable sampling pumps, the import of multiple adjustable sampling pumps is communicated with the sampling tube of multiple sampling components one by one, and the flue gas flow discharged from the outlet of adjustable sampling pump is adjustable;Multiple gas flow meters, the import of multiple gas flow meters is communicated with the outlet of multiple adjustable sampling pumps one by one;Mixing tank, the import of mixing tank is communicated with the outlet of multiple gas flow meters;Analysis instrument, the import of analysis instrument is communicated with the outlet of mixing tank.The utility model passes into mixing tank after mixing after the flue gas in multiple gas flow meters is passed into analysis instrument;Gas flow meter is adjusted sampling pump by feedback, realize multiple highly accurate mixing, and then control the quantity of each sampling point in flue gas duct, so that the flue gas quantity of each sampling point in mixing tank and analysis instrument is required flue gas quantity.

Description

Technical Field

[0001] This utility model relates to the field of carbon dioxide extraction gas sampling technology, specifically to a flue gas mixing sampling device. Background Technology

[0002] In the application of online carbon dioxide emission monitoring systems, the gas flow field distribution characteristics at the desulfurization outlet pose a key challenge to the accuracy of concentration measurement. After the desulfurization process, the gas in the flue often exhibits concentration gradient differences due to uneven flow velocity, local turbulence, and the influence of residual desulfurizing agent particles. Single-point sampling is easily affected by local flow field fluctuations, leading to insufficient data representativeness. Existing single-point monitoring methods are prone to systematic errors when dealing with issues such as airflow segregation, local air leakage, or insufficient mixing in the flue cross-section. Especially at the desulfurization outlets of large industrial boilers and kilns, such deviations can reach more than 10%, directly affecting the accuracy of carbon emission accounting. Therefore, adopting multi-point mixed sampling technology, by integrating gas samples from different areas of the flue, can effectively offset local concentration fluctuations, accurately reflect the overall emission level, and provide reliable data support for carbon quota management, emission reduction effect assessment, and environmental law enforcement, becoming an essential technical means for high-precision carbon emission monitoring.

[0003] In order to solve the above problems, this utility model is hereby proposed. Utility Model Content

[0004] The purpose of this invention is to provide a flue gas mixing and sampling device.

[0005] The above objectives are achieved through the following technical solutions:

[0006] A flue gas mixing and sampling device, comprising:

[0007] Multiple sampling components, each of the sampling components including a sampling tube for inserting into the flue to take samples;

[0008] Multiple adjustable sampling pumps are provided, with the inlets of the multiple adjustable sampling pumps connected one-to-one with the sampling tubes of the multiple sampling components, and the flue gas flow rate discharged from the outlet of the adjustable sampling pumps is adjustable.

[0009] Multiple gas flow meters, the inlets of which are connected one-to-one with the outlets of multiple adjustable sampling pumps, wherein the gas flow meters are used to measure at least one of the volumetric flow rate and mass flow rate of the flue gas discharged from the outlet of the adjustable sampling pump connected thereto.

[0010] A mixing tank, the inlet of which is connected to the outlet of a plurality of gas flow meters so that the flue gas discharged from the plurality of gas flow meters can be introduced into the mixing tank for mixing;

[0011] An analytical instrument, the inlet of which is connected to the outlet of the mixing tank.

[0012] Therefore, the flue gas mixing sampling device according to the present invention has the advantages of reducing measurement deviation and improving measurement accuracy.

[0013] The flue gas mixing sampling device of this utility model embodiment also includes a refrigeration device for cooling the flue gas. The refrigeration device has multiple heat exchange chambers arranged at intervals. Each heat exchange chamber has a first air inlet, a first air outlet, and a first water outlet. The first air inlets of the multiple heat exchange chambers are connected one-to-one with the sampling tubes of the multiple sampling components. The first air outlets of the multiple heat exchange chambers are connected one-to-one with the inlets of the multiple adjustable sampling pumps. The condensate in the heat exchange chambers can be discharged through the first water outlet.

[0014] The flue gas mixing sampling device of this utility model embodiment also includes multiple heat tracing composite tubes. Each heat tracing composite tube includes a heating part and a heating tube. The heating part can heat the flue gas in the heating tube. Each sampling tube is connected to the corresponding heat exchange chamber through the heating tube of one of the heat tracing composite tubes.

[0015] The flue gas mixing and sampling device of this utility model embodiment also includes multiple tubeless pumps, the inlets of the multiple tubeless pumps are connected one-to-one with the first outlet of the multiple heat exchange chambers, and each tubeless pump is provided with a driver that cooperates with it.

[0016] The flue gas mixing and sampling device of this utility model embodiment also includes a pre-pump filter assembly, which includes multiple pre-pump filters. The first air outlets of the multiple heat exchange chambers are connected to the inlets of the multiple adjustable sampling pumps through multiple first air pipes, and each first air pipe is provided with a pre-pump filter.

[0017] The flue gas mixing sampling device of this utility model embodiment also includes a post-pump filter assembly, which includes multiple post-pump filter elements. The inlets of multiple gas flow meters are connected to the outlets of multiple adjustable sampling pumps through multiple second gas pipes in a one-to-one correspondence. Each second gas pipe is provided with a post-pump filter element.

[0018] In some embodiments, each of the sampling components includes

[0019] A protective tube is used to extend into the flue, and the sampling tube is located inside the protective tube;

[0020] A first heater is used to heat the flue gas inside the sampling tube.

[0021] In some embodiments, the first heater is a heat tracing coil, which is spirally disposed inside the protective tube and surrounds the sampling tube.

[0022] In some embodiments, the sampling assembly further includes a filter element disposed at the inlet of the sampling tube, the filter element having a plurality of filter holes communicating with the inlet of the sampling tube.

[0023] Preferably, the filter element is made of metal or ceramic.

[0024] Beneficial technical effects:

[0025] This invention introduces a method where flue gas from multiple gas flow meters is mixed in a mixing tank before being introduced into an analytical instrument. By controlling the flue gas flow rate discharged from the outlet of each adjustable sampling pump, the amount of gas sampled by each sampling tube is controlled. The gas flow meters, through feedback from the adjustable sampling pumps, ensure that the sampling flow rate of each channel remains consistent with the initial set flow rate, achieving highly precise mixing of multiple channels. This controls the amount of gas sampled at each sampling point in the flue, ensuring that the amount of flue gas entering the mixing tank and then at each sampling point in the analytical instrument is the required amount, thereby reducing measurement deviation and improving measurement accuracy. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the flue gas mixing and sampling device of this utility model.

[0027] Figure label:

[0028] Sampling tube 1; Heat tracing composite tube 11; Protective tube 12; First heater 13; Filter element 14;

[0029] Adjustable sampling pump 2;

[0030] Gas flow meter 3;

[0031] Mixing tank 4;

[0032] Analytical Instrument 5;

[0033] Refrigeration equipment 7; heat exchange chamber 71; first air inlet 72; first air outlet 73; first water outlet 74; tubeless pump 75; driver 76; pulse generator 77;

[0034] 8. Pre-pump filter assembly; 81. Pre-pump filter element; 82. First air pipe;

[0035] Post-pump filter assembly 9; post-pump filter element 91; second air pipe 92. Detailed Implementation

[0036] The embodiments of the present invention are described in detail below, examples of which are shown 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.

[0037] The flue gas mixing and sampling device of this utility model according to the accompanying drawings is described below. Figure 1 As shown, a flue gas mixing and sampling device includes multiple sampling components, multiple adjustable sampling pumps 2, multiple gas flow meters 3, a mixing tank 4, and an analytical instrument 5.

[0038] The sampling assembly includes a sampling tube 1, which is used to extend into the flue to take samples. Specifically, multiple sampling tubes 1 can be spaced out at multiple sampling points in the flue to take samples from multiple sampling points in the flue.

[0039] The inlet of the adjustable sampling pump 2 is connected to the sampling tube 1 of the sampling assembly in a one-to-one correspondence. That is, each sampling tube 1 has an adjustable sampling pump 2 connected to it, so that the adjustable sampling pump 2 can extract the flue gas at a sampling point in the flue through the sampling tube 1 connected to it. For example, multiple adjustable sampling pumps 2 are pump bodies with the same parameters.

[0040] The flow rate of flue gas discharged from the outlet of the adjustable sampling pump 2 is adjustable. Specifically, the flow rate (power) of the adjustable sampling pump 2 is adjustable, which means that the suction power of the sampling pump 2 is adjustable. Therefore, by controlling the flow rate (power) of the adjustable sampling pump 2, the flow rate and efficiency of the flue gas extracted by the sampling tube 1 can be adjusted.

[0041] The inlets of multiple gas flow meters 3 are connected one-to-one with the outlets of multiple adjustable sampling pumps 2. The gas flow meters 3 measure at least one of the volumetric flow rate and mass flow rate of the flue gas discharged from the outlet of the connected adjustable sampling pump 2, thereby measuring the amount of flue gas extracted from each sampling tube 1 so that the operator can determine the amount of sample taken from each sampling tube 1. For example, the gas flow meters 3 are used to measure both the volumetric flow rate and mass flow rate of the flue gas discharged from the outlet of the connected adjustable sampling pump 2. The multiple gas flow meters 3 are flow meters with identical parameters.

[0042] The inlet of the mixing tank 4 is connected to the outlet of multiple gas flow meters 3 so that the flue gas discharged from the multiple gas flow meters 3 can be introduced into the mixing tank 4 for mixing. The inlet of the analytical instrument 5 is connected to the outlet of the mixing tank 4. That is to say, the flue gas drawn by multiple sampling tubes 1 enters the mixing tank 4, mixes, and then enters the analytical instrument 5 for analysis, thereby facilitating sampling and detection.

[0043] The measurement information of each gas flow meter 3 is at least one of the volumetric flow rate and mass flow rate of the flue gas discharged from the outlet of the adjustable sampling pump 2 connected to it. That is, the measurement information of each gas flow meter 3 is the amount of flue gas sampled by the sampling tube 1 connected to it. The measurement information of each gas flow meter 3 serves as the basis for adjusting the adjustable sampling pump 2 connected to that gas flow meter 3.

[0044] By controlling the flue gas flow rate discharged from the outlet of each adjustable sampling pump 2, the amount of sample taken by each sampling tube 1 is controlled, thereby controlling the amount of sample taken at each sampling point in the flue. This ensures that the amount of flue gas entering the mixing tank 4 and then the analysis instrument 5 at each sampling point is the required amount, thus reducing measurement deviation and improving measurement accuracy. Multiple adjustable sampling pumps 2 and multiple gas flow meters 3 work in a one-to-one correspondence to precisely control the consistency of the flue gas sampling flow rate of each (sampling tube 1).

[0045] For example, the measurement information (flow signal) of each gas flow meter 3 is compared with the set flow rate. When the dry flue gas flow rate through each gas flow meter 3 is stable and consistent with the set flow rate, the adjustable sampling pump 2 maintains a stable power output. When the flow rate of a certain gas flow meter 3 is greater than the set flow rate due to abnormalities in the flue's operating conditions or the path through which the flue gas flows, a signal is sent to the adjustable sampling pump 2 to lower the flow rate until the flow rate of the gas flow meter 3 matches the set flow rate. When the flow rate of a certain gas flow meter is less than the set flow rate, a signal is sent to the adjustable sampling pump 2 to raise the flow rate until the flow rate of the gas flow meter 3 matches the set flow rate. When only one flue gas needs to be measured, the adjustable sampling pumps 2 of the other branches are turned off.

[0046] Therefore, the flue gas mixing sampling device according to the present invention has the advantages of reducing measurement deviation and improving measurement accuracy.

[0047] like Figure 1 As shown, each sampling assembly includes a protective tube 12, a first heater 13, and a filter element 14.

[0048] The protective tube 12 is used to extend into the flue, and the sampling tube 1 is located inside the protective tube 12. Specifically, the protective tube 12 is sleeved on the outer periphery of the sampling tube 1 to reduce the corrosion of the sampling tube 1 by the flue gas. Multiple protective tubes 12 can be extended into the flue to sample multiple sampling points in the flue.

[0049] The first heater 13 is used to heat the flue gas inside the sampling tube 1. Specifically, the first heater 13 is a heat tracing coil, which is spirally arranged inside the protective tube 12 and surrounds the periphery of the sampling tube 1. The heat tracing coil can heat the temperature of the flue gas inside the sampling tube 1, thereby preventing the water vapor in the flue gas entering the sampling tube 1 from liquefying. For example, the first heater 13 is used to heat the flue gas inside the sampling tube 1 so that the temperature of the flue gas inside the sampling tube 1 is greater than or equal to 130°C and less than or equal to 180°C.

[0050] The filter element 14 is located at the inlet of the sampling tube 1, and the filter element 14 has multiple filter holes communicating with the inlet of the sampling tube 1. Specifically, the filter element 14 is used to screen out fly ash in the flue gas. For example, the filter element 14 is made of metal or ceramic, and the length direction of the filter element 14 is consistent with the length direction of the sampling tube 1.

[0051] like Figure 1 As shown, it also includes a refrigeration device 7, multiple heat tracing composite pipes 11 and multiple pipeless pumps 75.

[0052] The refrigeration device 7 is used to cool the flue gas, thereby causing the water vapor in the flue gas to condense. The refrigeration device 7 has multiple spaced heat exchange chambers 71, each heat exchange chamber 71 having a first air inlet 72, a first air outlet 73, and a first water outlet 74. The flue gas is introduced into the heat exchange chamber 71 through the first air inlet 72 for cooling, and the cooled flue gas is discharged from the heat exchange chamber 71 through the first air outlet 73. The condensate in the heat exchange chamber 71 can be discharged through the first water outlet 74.

[0053] The first air inlets 72 of multiple heat exchange chambers 71 are connected one-to-one with the sampling tubes 1 of multiple sampling components. This allows the flue gas in each sampling tube 1 to be passed into the corresponding heat exchange chamber 71 for cooling, thus treating the flue gas into dry flue gas. Specifically, each heat tracing composite tube 11 includes a heating section and a heating tube. The heating section heats the flue gas in the heating tube, and each sampling tube 1 is connected to the corresponding heat exchange chamber 71 through the heating tube of a heat tracing composite tube 11. That is, the first air inlets 72 of multiple heat exchange chambers 71 are connected one-to-one with the sampling tubes 1 of multiple sampling components through the heating tubes of multiple heat tracing composite tubes 11. Therefore, during the process of flue gas exiting from the sampling tube 1 and entering the heating tube of the heat tracing composite tube 11, water vapor in the flue gas is less likely to condense. For example, the heating section of the heat tracing composite tube 11 can heat the flue gas in the heating tube of the heat tracing composite tube 11, making the flue gas temperature in the heat tracing composite tube 11 (heating tube) greater than or equal to 120°C.

[0054] The first air outlet 73 of the multiple heat exchange chambers 71 are connected to the inlet of multiple adjustable sampling pumps 2 in a one-to-one correspondence, so that the adjustable sampling pumps 2, heat exchange chambers 71, heat tracing composite pipes 11 and sampling pipes 1 are connected in sequence, so that the adjustable sampling pumps 2 can use the sampling pipes 1 to evacuate the sampling points in the flue.

[0055] Multiple tubeless pumps 75 have their inlets connected one-to-one with the first outlets 74 of multiple heat exchange chambers 71. Each tubeless pump 75 is equipped with a driver 76 that works in conjunction with it. Specifically, the heat exchange chamber 71 includes a spiral section and a straight pipe section. Flue gas passes through the spiral section and the straight pipe section sequentially. The first air inlet 72 is the inlet of the spiral section, and the first air outlet 73 is the outlet of the straight pipe section. The first outlet 74 is located at the connection between the spiral section and the straight pipe section, and is located at the bottom of the heat exchange chamber 71. The tubeless pumps 75, the driver 76, and the pulse generator 77 are connected in sequence to extract water from the heat exchange chamber 71. The tubeless pumps 75 eliminate the need for easily worn parts such as peristaltic pumps with hoses, greatly improving their lifespan and extending maintenance cycles.

[0056] like Figure 1 As shown, in some embodiments, a pre-pump filter assembly 8 is also included. The pre-pump filter assembly 8 includes a plurality of pre-pump filter elements 81 and a first housing. The plurality of pre-pump filter elements 81 are disposed in the first housing and are used to filter impurities in the flue gas.

[0057] The first air outlets 73 of multiple heat exchange chambers 71 are connected to the inlets of multiple adjustable sampling pumps 2 via multiple first air pipes 82, each with a pre-pump filter 81. This allows the multiple pre-pump filters 81 to filter the flue gas discharged from the multiple heat exchange chambers 71, reducing impurities in the flue gas. For example, the pre-pump filters 81 can reduce dust in the flue gas, thereby improving the service life of the adjustable sampling pumps 2.

[0058] like Figure 1 As shown, in some embodiments, a post-pump filter assembly 9 is also included. The post-pump filter assembly 9 includes a plurality of post-pump filter elements 91 and a second housing. The plurality of post-pump filter elements 91 are disposed in the second housing and are used to filter impurities in the flue gas.

[0059] The inlets of multiple gas flow meters 3 are connected to the outlets of multiple adjustable sampling pumps 2 via multiple second gas pipes 92, each with a post-pump filter 91. This allows the multiple post-pump filters 91 to filter the flue gas discharged from the multiple adjustable sampling pumps 2. For example, the post-pump filter 91 can be an oil-gas filter, reducing oil contamination in the flue gas and thus extending the service life of the gas flow meters 3 and the analyzer 5.

[0060] The multi-point flue gas mixing sampling method of the above-mentioned flue gas mixing sampling device includes the following steps:

[0061] The sampling tubes 1 of multiple sampling components are inserted into multiple locations within the flue to take samples. Specifically, multiple sampling components 1, including sampling tubes 1 (and protective tubes 12), are inserted at intervals into multiple sampling points within the flue to take samples.

[0062] Multiple adjustable sampling pumps 2 are used to pass flue gas from multiple sampling tubes 1 into multiple gas flow meters 3, so that the gas flow meters 3 can measure at least one of the volumetric flow rate and mass flow rate of the flue gas discharged from the outlet of the adjustable sampling pump 2 connected to them. Specifically, the multiple sampling tubes 1 are connected to the multiple adjustable sampling pumps 2 one-to-one through multiple heat tracing composite pipes 11 and multiple heat exchange chambers 71. The multiple gas flow meters 3 measure the volumetric flow rate and mass flow rate of the flue gas discharged from the outlet of the adjustable sampling pump 2 connected to them.

[0063] The flow rates of flue gas discharged from the outlets of multiple adjustable sampling pumps 2 are adjusted based on the measurement data from multiple gas flow meters 3. Specifically, the measurement information of each gas flow meter 3 is at least one of the volumetric flow rate and mass flow rate of the flue gas discharged from the outlet of the adjustable sampling pump 2 connected to it, as measured by the volume flow meter 3. The amount of sample taken by each sampling tube 1 can be controlled by controlling the flow rate of the flue gas discharged from the outlet of each adjustable sampling pump 2. The measurement information (flow rate signal) of each gas flow meter 3 is compared with the set flow rate. When the dry flue gas flow rate after passing through each gas flow meter 3 is stable and consistent with the set flow rate, the adjustable sampling pump 2 maintains a stable power output; when the flow rate of a certain gas flow meter 3 is greater than the set flow rate due to abnormalities in the flue gas duct conditions or the path through which the flue gas flows, a signal is sent to adjust the flow rate of the adjustable sampling pump 2 downward until the flow rate of the gas flow meter 3 is consistent with the set flow rate; when the flow rate of a certain gas flow meter is less than the set flow rate, a signal is sent to adjust the flow rate of the adjustable sampling pump 2 upward until the flow rate of the gas flow meter 3 is consistent with the set flow rate. When only one flue gas needs to be measured, turn off the adjustable sampling pump 2 of the other branches.

[0064] The flue gas from multiple gas flow meters 3 is introduced into a mixing tank 4 for mixing before being introduced into the analyzer 5. The amount of gas sampled by each sampling tube 1 is controlled by controlling the flue gas flow rate discharged from the outlet of each adjustable sampling pump 2. The gas flow meters 3, through feedback from the adjustable sampling pumps 2, ensure that the sampling flow rate of each channel remains consistent with the initial set flow rate, achieving highly precise mixing of multiple channels. This controls the amount of gas sampled at each sampling point in the flue, ensuring that the amount of flue gas entering the mixing tank 4 and then the analyzer 5 is the required amount, thereby reducing measurement deviation and improving measurement accuracy.

[0065] Therefore, the multi-point flue gas mixing sampling method according to the present invention has the advantages of reducing measurement deviation and improving measurement accuracy.

[0066] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model.

[0067] 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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0068] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," 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 utility model according to the specific circumstances.

[0069] In this utility model, 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," "on top of," and "over" 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.

[0070] In this utility model, 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 this utility model. 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.

[0071] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A flue gas mixing and sampling device, characterized in that, include: Multiple sampling components, each including a sampling tube, which is used to extend into the flue to take samples; Multiple adjustable sampling pumps are provided, with their inlets connected one-to-one to the sampling tubes of the multiple sampling components, and the flue gas flow rate discharged from the outlet of the adjustable sampling pumps is adjustable. Multiple gas flow meters, with their inlets connected one-to-one to the outlet of an adjustable sampling pump, are used to measure at least one of the volumetric flow rate and mass flow rate of the flue gas discharged from the outlet of the adjustable sampling pump connected to them. A mixing tank, the inlet of which is connected to the outlet of a plurality of gas flow meters so that the flue gas discharged from the gas flow meters can be introduced into the mixing tank for mixing; An analytical instrument, the inlet of which is connected to the outlet of the mixing tank.

2. The flue gas mixing and sampling device according to claim 1, characterized in that, It also includes a refrigeration device for cooling flue gas. The refrigeration device has multiple spaced heat exchange chambers. Each heat exchange chamber has a first air inlet, a first air outlet, and a first water outlet. The first air inlets of the multiple heat exchange chambers are connected to the sampling tubes of multiple sampling components, and the first air outlets of the multiple heat exchange chambers are connected to the inlets of multiple adjustable sampling pumps. The condensate in the heat exchange chambers can be discharged through the first water outlet.

3. The flue gas mixing and sampling device according to claim 2, characterized in that, It also includes multiple heat tracing composite pipes, each comprising a heating section and a heating tube. The heating section can heat the flue gas inside the heating tube, and each sampling tube is connected to the corresponding heat exchange chamber through the heating tube of a heat tracing composite pipe.

4. The flue gas mixing and sampling device according to claim 2, characterized in that, It also includes multiple tubeless pumps, the inlets of which are connected one-to-one with the first outlets of multiple heat exchange chambers, and each tubeless pump is equipped with a driver that works with it.

5. The flue gas mixing and sampling device according to claim 2, characterized in that, It also includes a pre-pump filter assembly, which includes multiple pre-pump filters. The first air outlets of multiple heat exchange chambers are connected to the inlets of multiple adjustable sampling pumps through multiple first air pipes, and each first air pipe is equipped with a pre-pump filter.

6. The flue gas mixing and sampling device according to claim 2, characterized in that, It also includes a post-pump filtration assembly, which includes multiple post-pump filters. The inlets of multiple gas flow meters are connected to the outlets of multiple adjustable sampling pumps through multiple second air pipes, and each second air pipe is equipped with a post-pump filter.

7. The flue gas mixing and sampling device according to any one of claims 1-6, characterized in that, Each sampling component includes: A protective tube, which is used to extend into the flue, and the sampling tube is located inside the protective tube; A first heater is used to heat the flue gas inside the sampling tube.

8. The flue gas mixing and sampling device according to claim 7, characterized in that, The first heater is a heat tracing coil, which is spirally arranged inside the protective tube and surrounds the sampling tube.

9. The flue gas mixing and sampling device according to claim 7, characterized in that, The sampling assembly also includes a filter element, which is located at the inlet of the sampling tube and has multiple filter holes that communicate with the inlet of the sampling tube.

10. The flue gas mixing and sampling device according to claim 9, characterized in that, The filter element is made of metal or ceramic.

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