Multi-point sampling device for flue gas component analysis of circulating fluidized bed boiler

Abstract

The utility model relates to a multi-point sampling device for flue gas component analysis of a circulating fluidized bed boiler. The multi-point sampling device comprises a sampling probe and a sampling probe rod, wherein the sampling probe rod is connected with the sampling probe; one end of the sampling probe rod is closed, the other end is opened and communicated with the sampling probe, and a plurality of sampling holes communicated with an inner cavity of the sampling probe rod are formed in the outer side wall of the sampling probe rod in the length direction; the sampling device further comprises a plug assembly, and the plug assembly comprises a plurality of plugs and is used for sealing the sampling hole; the plug is matched with the sampling hole, so that only one sampling hole is reserved for sampling flue gas when the sampling probe samples the sample gas every time. According to the multi-point sampling device disclosed by the utility model, flue gas at different positions in a flue is respectively sampled, and relatively accurate points are selected as measurement position points by carrying out statistical analysis on gas component concentration data measured at multiple positions, so that the accuracy of detection results of flue gas components and corresponding concentrations of the components in a subsequent detection process is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to flue gas sampling technical field especially relates to a circulating fluidized bed boiler flue gas component analysis's multipoint sampling device. BACKGROUND

[0002] CEMS is the abbreviation of "Continuous Emissions Monitoring System", which is a system for real-time, continuous monitoring of pollutant concentration in flue gas discharged by industrial facilities such as thermal power plants. The application of CEMS in thermal power plants is crucial for environmental protection and the improvement of combustion efficiency. Through real-time monitoring and data analysis, power plants can timely adjust the combustion process to ensure that pollutant emissions meet environmental protection standards. Flue gas CEMS is classified according to the sampling method and non-sampling method of flue gas from fixed emission sources, mainly divided into extraction type CEMS and in-situ type CEMS. Extraction type measurement refers to the process of directly extracting flue gas samples from the emission source, then sending the samples into the analyzer for monitoring after appropriate pretreatment. In-situ measurement refers to the detection of flue gas in the original position of the measured flue of the emission source by non-sampling method.

[0003] The present method uses extraction type measurement method. Currently, in the extraction type sampling system, the gas sampling device is usually composed of the following parts: sampling probe, sampling probe and sampling pipeline for gas transmission. In the conventional sampling system, the commonly used is the single-point arrangement of the sampling device, a sampling hole is arranged on the sampling probe, which is a single-point sampling mode. For the case of uneven distribution of flue gas in the flue and existence of gas and dust turbulence, the single-point sampling gas composition concentration is not representative and cannot truly reflect the composition concentration of flue gas in the flue. UTILITY MODEL CONTENT

[0004] The utility model provides a kind of circulating fluidized bed boiler flue gas component analysis's multipoint sampling device, the sampling of different positions flue gas in flue is realized, and the relatively accurate point is selected as measurement position point by statistical analysis to the gas composition concentration data of multiple position measurement, ensure the accuracy of the detection result of flue gas composition and the corresponding concentration of composition in subsequent detection process, solve the difficulty that sampling result is not accurate caused by single sampling point position.

[0005] To achieve the above object, the utility model adopts the following technical scheme:

[0006] A kind of circulating fluidized bed boiler flue gas component analysis's multipoint sampling device, sampling probe and sampling probe rod, the above-mentioned sampling probe rod is connected with the above-mentioned sampling probe;

[0007] The sampling probe is closed at one end and open at the other end and is in communication with the sampling probe head, and a plurality of sampling holes are formed in the outer wall of the sampling probe along the length thereof and are in communication with the inner cavity of the sampling probe;

[0008] The plug assembly includes a plurality of plugs for closing the sampling holes.

[0009] The plug cooperates with the sampling hole to allow only one sampling hole to sample flue gas each time the sampling probe is used for sampling.

[0010] Preferably, the sampling hole includes a sampling hole body and a fixing column arranged outside the sampling hole body, the fixing column is coaxial with the sampling hole body and has a threaded hole, the threaded hole is in communication with the sampling hole body, and the plug has a threaded column matched with the threaded hole.

[0011] Preferably, the sampling probe includes a fixing sleeve, an integrated box, a filter, and a heat preservation assembly.

[0012] One end of the fixing sleeve is connected to the integrated box, and the other end is connected to the outer wall of the flue of the boiler body to be measured.

[0013] The filter is detachably arranged in the integrated box, the heat preservation assembly is arranged on the outer side wall of the filter, and the outlet of the filter is connected to the sampling pipe.

[0014] The open end of the sampling probe passes through the sleeve and the outer side wall of the integrated box and is in communication with the filter.

[0015] Preferably, the outer side wall of the integrated box near the fixing sleeve is provided with a connecting column with external threads, and the connecting column has a through hole for the sampling probe to pass through, and the connecting column is threadedly connected to the inner side wall of the end portion of the fixing sleeve.

[0016] A reinforcing plate is connected between the outer side wall of the fixing sleeve and the side wall of the integrated box near the fixing sleeve.

[0017] Preferably, a positioning sleeve is arranged in the fixing sleeve, and the two are coaxial, and the outer side wall of the positioning sleeve and the inner side wall of the fixing sleeve are connected by a connecting rod.

[0018] The sampling probe passes through the inner hole of the positioning sleeve and the through hole and is in communication with the filter, and the positioning sleeve is in clearance fit with the sampling probe.

[0019] Preferably, the outer side wall of the filter is provided with a connecting plate, and the connecting plate is detachably connected to the inner side wall of the integrated box by bolts.

[0020] Preferably, the integrated box side wall is provided with a placing box for placing the plug.

[0021] Compared with the prior art, the utility model has the beneficial effects that:

[0022] Through the setting of the plug, the plug cooperates with the sampling hole, and when the sampling probe takes sample each time, only one sampling hole can be reserved for flue gas sampling through the plug, so that the position change of the sampling hole in the flue can be realized very conveniently, the flue gas at different positions in the flue is sampled respectively, and the accuracy of the detection result of the flue gas composition and the corresponding concentration of the composition in the subsequent detection process is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the specific embodiment of the utility model or the technical scheme in the prior art, the drawings needed to be used in the specific embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0024] Figure 1 It is the whole schematic view of the device of the embodiment in the utility model;

[0025] Figure 2 It is the whole sectional view of the device of the embodiment in the utility model;

[0026] Figure 3 It is the sectional view of the sampling probe of the embodiment in the utility model;

[0027] Figure 4 It is the connection diagram of the integrated box and the filter of the embodiment in the utility model;

[0028] Figure 5 It is the schematic view of the fixing sleeve and the positioning sleeve of another embodiment in the utility model.

[0029] Explanation of reference signs:

[0030] 1, sampling probe; 11, fixing sleeve; 12, integrated box; 13, filter; 14, heat preservation assembly; 15, reinforcing plate; 16, positioning sleeve; 17, connecting plate; 18, connecting column; 2, sampling probe; 21, sampling hole; 22, fixing column; 3, plug; 4, placing box; 5, sampling tube. DETAILED DESCRIPTION

[0031] The technical solutions of the present application will be described clearly and completely in connection with the drawings. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0032] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0033] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0034] As Figures 1-4The utility model discloses a kind of multi-point sampling devices for circulating fluidized bed boiler flue gas component analysis, sampling probe 1 and sampling probe rod 2, sampling probe rod 2 is used to sample gas, wherein sampling probe rod 2 one end is closed, the other end is open and is connected with sampling probe 1 and communicates, and sampling probe rod 2 outer wall is provided with sampling hole 21, for flue gas sampling, flue gas enters sampling probe rod 2 by sampling hole 21, then enters sampling probe 1 and is filtered and heat-insulated, finally by sampling tube 5 connected with sampling probe 1 into external detection device and is detected;In the embodiment, sampling hole 21 has multiple, multiple sampling holes 21 are evenly arranged along the length direction of sampling probe rod 2, it can be known that, sampling probe rod 2 is inserted into flue, and sampling probe rod 2 length is certain, so each sampling hole 21 corresponds a sampling position, correspondingly, sampling device further includes plug 3 component, wherein plug 3 component includes multiple plugs 3, plug 3 can be used to cooperate with sampling hole 21, and close sampling hole 21;In actual use process, the whole flue gas detection process is divided into multiple detections, in each detection, sampling probe rod 2 only retains a sampling hole 21 to sample flue gas, and the rest sampling holes 21 are closed by plug 3, specifically, when sampling probe rod 2 samples, sampling probe rod 2 samples flue gas by only retained sampling hole 21, and the sample gas entered is the flue gas flowing at the sampling position in the flue corresponding to this sampling hole 21, after the flue gas at this position is sampled and detected, sampling probe rod 2 is removed, and the sampling hole 21 of sample gas is replaced (all sampling holes 21 except this are still closed by plug 3), then sampling probe rod 2 is inserted into flue, and the flue gas flowing at another corresponding position is sampled by sampling hole 21, after sample gas detection is completed, sampling hole 21 is replaced again, and it is circulated, until each sampling hole 21 is sampled and detected, and the whole sampling device is sampled, then each position sample gas is processed and analyzed by gas analyzer, and finally the composition in flue gas and the corresponding concentration of composition are obtained, so that the detection result of flue gas is more accurate, it can be known that, subsequent sample gas detection is not the content of the application, here is just simply described, for the purpose of understanding the whole flue gas sampling process and using this sampling device and sampling.

[0035] The utility model discloses a kind of multi-point sampling devices for circulating fluidized bed boiler flue gas component analysis, sampling probe 1 and sampling probe rod 2, sampling probe rod 2 is used to sample gas, wherein sampling probe rod 2 one end is closed, the other end is open and is connected with sampling probe 1 and communicates, and sampling probe rod 2 outer wall is provided with sampling hole 21, for flue gas sampling, flue gas enters sampling probe rod 2 by sampling hole 21, then enters sampling probe 1 and is filtered and heat-insulated, finally by sampling tube 5 connected with sampling probe 1 into external detection device and is detected;In the embodiment, sampling hole 21 has multiple, multiple sampling holes 21 are evenly arranged along the length direction of sampling probe rod 2, it can be known that, sampling probe rod 2 is inserted into flue, and sampling probe rod 2 length is certain, so each sampling hole 21 corresponds a sampling position, correspondingly, sampling device further includes plug 3 component, wherein plug 3 component includes multiple plugs 3, plug 3 can be used to cooperate with sampling hole 21, and close sampling hole 21;In actual use process, the whole flue gas detection process is divided into multiple detections, in each detection, sampling probe rod 2 only retains a sampling hole 21 to sample flue gas, and the rest sampling holes 21 are closed by plug 3, specifically, when sampling probe rod 2 samples, sampling probe rod 2 samples flue gas by only retained sampling hole 21, and the sample gas entered is the flue gas flowing at the sampling position in the flue corresponding to this sampling hole 21, after the flue gas at this position is sampled and detected, sampling probe rod 2 is removed, and the sampling hole 21 of sample gas is replaced (all sampling holes 21 except this are still closed by plug 3), then sampling probe rod 2 is inserted into flue, and the flue gas flowing at another corresponding position is sampled by sampling hole 21, after sample gas detection is completed, sampling hole 21 is replaced again, and it is circulated, until each sampling hole 21 is sampled and detected, and the whole sampling device is sampled, then each position sample gas is processed and analyzed by gas analyzer, and finally the composition in flue gas and the corresponding concentration of composition are obtained, so that the detection result of flue gas is more accurate, it can be known that, subsequent sample gas detection is not the content of the application, here is just simply described, for the purpose of understanding the whole flue gas sampling process and using this sampling device and sampling.

[0036] Specifically, the sampling hole 21 includes a sampling hole 21 body and a fixing column 22 arranged outside the sampling hole 21 body, the fixing column 22 is fixedly connected to the outer side wall of the sampling probe rod 2, the fixing column 22 is coaxial with the sampling hole 21 body and is provided with a threaded hole, the threaded hole is communicated with the sampling hole 21 body, the plug 3 is provided with a threaded column matched with the threaded hole, the sampling hole 21 is closed by matching the threaded column with the threaded hole, which is simple and convenient.

[0037] Specifically, the sampling probe 1 includes a fixing sleeve 11, an integrated box 12, a filter 13 and a heat preservation assembly 14; wherein one end of the fixing sleeve 11 is connected with the integrated box 12, the other end is connected with the outer wall of the circulating fluidized bed boiler body to be measured, and the sampling probe rod 2 can be inserted into the flue; wherein the filter 13 is detachably installed in the integrated box 12, the heat preservation assembly 14 is arranged on the outer side wall of the filter 13, and specifically can be a heating band, the outlet of the filter 13 is connected with the sampling tube 5, and the open end of the sampling probe rod 2 directly penetrates through the outer side wall of the fixing sleeve 11 and the integrated box 12 and is communicated with the inlet of the filter 13. The purpose of the integrated box 12 is to fix and protect the filter 13 and the heat preservation assembly 14, wherein the fixing sleeve 11 plays a connecting role on one hand and wraps part of the sampling probe 1 on the other hand to avoid damage.

[0038] Specifically, the integrated box 12 is provided with a connecting column 18 with external threads on the outer side wall close to the fixing sleeve 11, the connecting column 18 has a through hole for the sampling probe rod 2 to penetrate, and the connecting column 18 is connected with the threads on the inner side wall of the end of the fixing sleeve 11, so that the integrated box 12 and the fixing sleeve 11 are connected together; in order to reinforce the connection between the integrated box 12 and the fixing sleeve 11, a reinforcing plate 15 is connected between the outer side wall of the fixing sleeve 11 and the side wall of the integrated box 12 close to the fixing sleeve 11, and in this embodiment, the two ends of the reinforcing plate 15 are welded to the outer side walls of the fixing sleeve 11 and the integrated box 12 respectively.

[0039] Specifically, the outer side wall of the filter 13 is provided with a connecting plate 17, the connecting plate 17 is detachably connected with the mounting plate arranged on the inner side wall of the integrated box 12 through bolts, and the end of the integrated box 12 away from the fixing sleeve 11 is open, facilitating the installation and removal of the filter 13; during sampling, when the position of the sampling hole 21 is replaced, the filter 13 and the heat preservation assembly 14 are only needed to be pulled out together, then the sampling hole 21 is replaced using the plug 3, and then the filter 13 and the heat preservation assembly 14 are put into the integrated box 12, the sampling probe rod 2 penetrates through the integrated box 12, the connecting column 18 and the fixing sleeve 11 into the flue in sequence, and the gas sampling work is continued. Of course, a box cover can be arranged at the opening of the integrated box 12, the box cover is connected with the integrated box 12 through bolts, and the sampling tube penetrates through the box cover and is communicated with the outlet of the filter 13 in the box cover.

[0040] Specifically, the side wall of the integrated box 12 is provided with a placing box 4, which can be opened and used for placing the plug 3, so as to avoid the loss of the plug 3, and the placing box 4 also has a spare plug 3 placed therein.

[0041] Specifically, as shown in the drawings, Figure 5 In another embodiment, a positioning sleeve 16 is arranged in the fixing sleeve 11, and the two are coaxially arranged. The outer side wall of the positioning sleeve 16 and the inner side wall of the fixing sleeve 11 are fixedly connected through a connecting rod. Therefore, the sampling probe rod 2 needs to pass through the through hole on the connecting column 18 and the positioning sleeve 16 to communicate with the inlet of the filter 13. The connecting rod can support the overall weight of the upper part of the sampling probe rod 2, and to a certain extent, can avoid the situation that the sampling probe rod 2 easily shakes due to the excessive wind force of the flue gas, so as to ensure that the sampling position of the sampling hole 21 is not easily changed during sampling, and the stability of the sampling process is ensured. Of course, the positioning sleeve 16 and the sampling probe rod 2 are in clearance fit, specifically, the sampling probe rod 2 can smoothly move on the inner hole of the positioning sleeve 16. In this embodiment, the inner diameter of the positioning sleeve 16 is 1.1 times of the inner diameter of the sampling probe rod 2.

[0042] The above-mentioned embodiments are only preferred embodiments of the present application, and cannot be used to limit the scope of protection of the present application. Any non-essential changes and replacements made by those skilled in the art on the basis of the present application shall belong to the scope of protection required by the present application.

Claims

1. A multi-point sampling device for circulating fluidized bed boiler flue gas component analysis, characterized in that, A sampling probe and a sampling probe rod connected with the sampling probe; The sampling probe rod is closed at one end and open at the other end and communicates with the sampling probe, and a plurality of sampling holes communicating with the inner cavity of the sampling probe rod are arranged on the outer wall of the sampling probe rod along the length direction; A plug assembly is further included, which includes a plurality of plugs for closing the sampling holes; The plug cooperates with the sampling hole so that only one sampling hole is kept for sampling flue gas when the sampling probe samples gas each time.

2. The multipoint sampling device of claim 1, wherein, The sampling hole includes a sampling hole body and a fixing column arranged outside the sampling hole body, the fixing column is coaxial with the sampling hole body and is provided with a threaded hole, the threaded hole communicates with the sampling hole body, and the plug has a threaded column matched with the threaded hole.

3. The multipoint sampling device of claim 1, wherein, The sampling probe includes a fixing sleeve, an integrated box, a filter and a heat preservation assembly; One end of the fixing sleeve is connected with the integrated box, and the other end is connected with the outer wall of the flue of the boiler body to be measured; The filter is detachably arranged in the integrated box, the heat preservation assembly is arranged on the outer side wall of the filter, and the outlet of the filter is connected with a sampling pipe; The open end of the sampling probe rod communicates with the filter through the sleeve and the outer side wall of the integrated box.

4. The multipoint sampling device of claim 3, wherein, The integrated box is provided with a connecting column with external threads on the outer side wall close to the fixing sleeve, the connecting column has a through hole for the sampling probe rod to pass through, and the connecting column is threadedly connected with the inner side wall of the end portion of the fixing sleeve; A reinforcing plate is connected between the outer side wall of the fixing sleeve and the side wall of the integrated box close to the fixing sleeve.

5. The multipoint sampling device of claim 4, wherein, A positioning sleeve is arranged in the fixing sleeve, the two are coaxial, and the outer side wall of the positioning sleeve and the inner side wall of the fixing sleeve are connected through a connecting rod; The sampling probe rod communicates with the filter through the inner hole of the positioning sleeve and the through hole, and the positioning sleeve is in clearance fit with the sampling probe rod.

6. The multipoint sampling device of claim 3, wherein, The outer side wall of the filter is provided with a connecting plate, and the connecting plate is detachably connected with the inner side wall of the integrated box through bolts.

7. The multipoint sampling device of claim 3, wherein, The side wall of the integrated box is provided with a placing box for placing the plug.

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