Multi-point equivalent horizontal flow flue gas sampler structure
By setting up multi-point equal-volume samplers on the inner wall of the flue, the problem of insufficient representativeness of single-point sampling is solved, accurate measurement of flue gas components and accuracy of data are achieved, and the safety and reliability of the sampler are ensured.
Patent Information
- Application Number
- CN202422843042.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-21
- Publication Date
- 2025-10-17
- Estimated Expiration
- 2034-11-21
AI Technical Summary
In the existing technology, horizontal flow flue gas sampling in coal-fired power plants mainly adopts single-point sampling, which has low representativeness, cannot accurately judge the flue gas conditions, and the data is not standardized.
A multi-point equal-volume horizontal flow flue gas sampler is designed, which includes a multi-directional sampling component and a sampling and analysis component. Multiple sampling ports are set in equal-area squares on the inner wall of the flue. The flue gas flows into the sampling and analysis component through multiple sampling tubes and branches for mixing and analysis, ensuring that the sample gas reaches the mixer in equal amounts.
It achieves precise measurement of flue gas components in the entire flue, improves the accuracy of data measurement, avoids sample gas cooling, condensation and blockage, and ensures the safety of the sampling circuit and the accuracy of the data.
Smart Images
Figure CN223449596U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of smoke detection, and in particular relates to a multi-point equal-amount horizontal flow smoke sampler structure. Background Art
[0002] Coal-fired power plants require real-time flue gas monitoring to promptly understand the types and concentrations of pollutants in the flue gas and assess pollution status. Currently, horizontal flue gas sampling primarily involves single-point sampling and analysis using analyzers. However, due to the large cross-sectional area of coal-fired power plant flues, single-point sampling is less representative, and the sampled data is non-standard, failing to represent the actual flue gas conditions and accurately assessing current flue gas conditions.
[0003] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. Utility Model Content
[0004] The purpose of the utility model is to provide a multi-point equal-volume horizontal flow smoke sampler structure, which can solve the problems raised by the background technology.
[0005] In order to achieve the above-mentioned purpose, the technical solution provided by a specific embodiment of the present invention is as follows:
[0006] A multi-point equal-volume horizontal flow flue gas sampler structure includes a multi-directional sampling component and a sampling and analysis component. The multi-directional sampling component is fixedly connected to the inner wall end face of the flue inner wall. The multi-directional sampling component is located in multiple equal-area squares divided in the flue inner wall, and a sampling port is provided in the center of each square for sampling; the sampling and analysis component is fixedly connected to the middle end face of the multi-directional sampling component, and the flue gas sampled by the multiple sampling ports is transported to the sampling and analysis component for analysis, and the sampling and analysis component is connected to an analyzer.
[0007] In one or more embodiments of the present invention, the multi-directional sampling assembly includes multiple sampling tubes and multiple sampling branches, and a pair of opposite end faces of the multiple sampling tubes are each provided with a sampling port. The multiple sampling tubes are fixedly connected to a plurality of equal-area squares divided in the inner wall of the flue, and a sampling branch is fixedly connected between a pair of the sampling tubes.
[0008] In one or more embodiments of the present invention, the sampling port parabolic surface forms an angle of 30°-60° with the flue gas flow direction.
[0009] In one or more embodiments of the utility model, a pair of the top end surface of sampling branch pipe is fixedly connected with purge pipe, the sampling branch pipe is communicated with the purge pipe, the top end surface of purge pipe is provided with purge interface, the purge interface is connected with purge delivery port.
[0010] In one or more embodiments of the utility model, the sampling main pipe is fixedly connected between the plurality of purge pipes and sampling analysis assembly, and the sampling main pipe is communicated with the sampling branch pipe.
[0011] In one or more embodiments of the utility model, the sampling analysis assembly comprises analysis pipe, mixing chamber, circumrotary mixer and flow sensor, the top end surface of analysis pipe is provided with analysis instrument interface, the mixing chamber is located at the end surface of analysis pipe close to sampling pipe, the mixing chamber is integrally formed with analysis pipe, the circumrotary mixer is fixedly connected to the inner wall end surface of mixing chamber, and the flow sensor is arranged on the lower inner wall end surface of analysis pipe in mixing chamber.
[0012] In one or more embodiments of the utility model, the mixing chamber is provided with analysis instrument sampling point between the circumrotary mixer and flow sensor.
[0013] In one or more embodiments of the utility model, the bottom end surface of analysis instrument interface is provided with sample gas output end.
[0014] In one or more embodiments of the utility model, the paths of flue gas flowing to circumrotary mixer in the plurality of sampling ports are same.
[0015] In one or more embodiments of the utility model, the plurality of multidirectional sampling assemblies and sampling analysis assemblies are vertically or obliquely fixedly connected to the inner wall of flue.
[0016] Compared with the prior art, the utility model discloses a kind of multidirectional sampling assembly and sampling analysis assembly are arranged, the composition of flue gas in whole flue can be measured, and the precision of data measurement is provided with strong guarantee, DRAWINGS
[0017] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, the drawings needed to be used in the following embodiment or prior art description will be simply introduced, and obviously, the drawings in the following description are only some embodiments in the utility model, and other drawings can be obtained according to these drawings without creative labor for ordinary skilled in the art.
[0018] Figure 1 It is the structural schematic diagram of a kind of multidirectional sampling assembly and sampling analysis assembly are arranged, the composition of flue gas in whole flue can be measured, and the precision of data measurement is provided with strong guarantee,
[0019] Figure 2 For Figure 1 A structure diagram of the sampling analysis assembly is shown in the figure.
[0020] Figure 3 A sectional view of the sampling analysis assembly installed in the inner wall of the flue.
[0021] Explanation of main reference signs:
[0022] 1 - inner wall of flue, 2 - sampling analysis assembly, 201 - analyzer interface, 202 - circumrotary mixer, 203 - mixing chamber, 204 - analyzer sampling point, 205 - flow sensor, 206 - sample gas output end, 207 - analysis tube, 3 - sampling tube, 301 - sampling port, 4 - sampling branch pipe, 5 - sampling main pipe, 6 - purge pipe, 601 - purge interface. DETAILED DESCRIPTION
[0023] In order to make the person skilled in the art better understand the technical scheme in the utility model, the technical scheme in the utility model embodiment will be described clearly and completely below in combination with the drawings in the utility model embodiment. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor should belong to the protection scope of the utility model.
[0024] As Figures 1-3 shown, the structure of the multi-point equal horizontal flow direction flue gas sampler in an embodiment of the utility model comprises a multi-directional sampling assembly and a sampling analysis assembly 2, the multi-directional sampling assembly is fixedly connected to the inner wall end face of the flue inner wall 1, the multi-directional sampling assembly is located in the multiple equal-area grids divided in the flue inner wall 1, each grid center is provided with a sampling port 301 for sampling, which ensures that the sample gas taken by each sampling port reaches the circumrotary mixer 202 at the same time, and provides a strong guarantee for the sampling analysis assembly 2 to accurately measure the flue gas components in the entire flue.
[0025] The multi-directional sampling assembly comprises multiple sampling tubes 3 and multiple sampling branch pipes 4. A pair of opposite end faces of the multiple sampling tubes 3 are provided with sampling ports 301, which realizes that the flue gas is transported to the sampling analysis assembly 2 for detection through the multiple sampling ports 301.
[0026] Further, the multiple sampling tubes 3 are fixedly connected in the multiple equal-area grids divided in the flue inner wall 1. That is, the cross section of the flue inner wall 1 is divided into multiple equal-area grids, each grid center is provided with a sampling tube 3, and the sampling tube 3 is provided with a sampling port, so that the inner wall of the flue inner wall 1 is fully covered for sampling. Further, the multiple sampling tubes 3 are fixedly connected in the multiple equal-area grids divided in the flue inner wall 1. That is, the cross section of the flue inner wall 1 is divided into multiple equal-area grids, each grid center is provided with a sampling tube 3, and the sampling tube 3 is provided with a sampling port, so that the inner wall of the flue inner wall 1 is fully covered for sampling.
[0027] Preferably, the flue inner wall 1 is divided into 8 equal-area squares in cross section, and of course, it can also be divided into 4, 16 or other equal-area squares according to the size of the flue cross section.
[0028] Among them, the sampling branch pipe 4 is fixedly connected between the pair of sampling pipes 3, that is, the sampling branch pipe 4 is connected with the pair of sampling pipes 3 respectively, and the sampling pipe 3 and the sampling branch pipe 4 are welded and fixed. The sampling pipe 3 is connected with the sampling branch pipe 4, and the flue gas sampled by the sampling port 301 in the flue inner wall 1 flows into the sampling analysis assembly 2 through the sampling pipe 3 and the sampling branch pipe 4 for analysis.
[0029] A plurality of purge pipes 6 are fixedly connected with the sampling analysis assembly 2, and the sampling main pipe 5 is in communication with the sampling branch pipe 4. That is, one side end face of the sampling main pipe 5 is in communication with the purge pipe 6, and the other end face of the sampling main pipe 5 is in communication with the analysis pipe 207.
[0030] It should be noted that the sampling port 301 is at an angle of 30°-60° with the flue gas flow direction, and preferably, the sampling port 301 is at an angle of 45° with the flue gas flow direction. The flow energy can be used to automatically drive the sample gas from the sampling port to the mixer, without the need for an additional flow inducer.
[0031] The top end face of the pair of sampling branch pipes 4 is fixedly connected with the purge pipe 6, that is, the purge pipe 6 is located at the middle part of the end face of the sampling branch pipe 4 and the sampling main pipe 5, and the sampling branch pipe 4, the sampling main pipe 5 and the purge pipe 6 are in communication. The top end face of the purge pipe 6 is provided with a purge interface 601. The purge interface 601 is connected with a purge conveying port, and the conveying port is connected with a gas pump, so as to convey gas flow into the purge pipe 6 through the purge interface 601 for purging, so as to prevent the sampling pipe 3, the sampling branch pipe 4, the sampling main pipe 5 and the sampling analysis assembly 2 from being easily blocked, and facilitate the later maintenance.
[0032] Among them, the analysis pipe 207 and the part of the end face of the purge pipe 6 are located on the outside end face of the flue inner wall 1, that is, the purge interface 601 and the analyzer interface 201 penetrate through the outside end face of the flue inner wall 1 and are connected with the purge conveying port or the analyzer.
[0033] The sampling analysis assembly 2 is fixedly connected to the middle part of the multi-directional sampling assembly, and the flue gas entering through the plurality of sampling ports 301 is conveyed to the sampling analysis assembly 2 for analysis.
[0034] Further, the sampling analysis assembly 2 comprises an analysis pipe 207, a mixing chamber 203, a rotary mixer 202 and a flow sensor 205. The top end face of the analysis pipe 207 is provided with an analyzer interface 201, and the analyzer interface 201 is connected with an analyzer for analyzing data. The connection of the analyzer interface 201 is a common knowledge in the art, and will not be described here.
[0035] AsFigures 1-2 As shown, the bottom end surface of the analyzer interface 201 is provided with a sample gas output end 206, and the flue gas after analysis can be output from the sample gas output end 206.
[0036] The mixing chamber 203 is located at the end surface of the analysis tube 207 close to the sampling tube 3, that is, the mixing chamber 203 is located between the analysis tubes 207, the mixing chamber 203 is integrally formed with the analysis tube 207, and the projection of the mixing chamber 203 on the horizontal plane is greater than the projection of the analysis tube 207 on the horizontal plane.
[0037] The circumrotary mixer 202 is fixedly connected to the inner wall end surface of the mixing chamber 203, and the mixing chamber 203 is located between the circumrotary mixer 202 and the flow sensor 205 to provide an analyzer sampling point 204. That is, the circumrotary mixer 202 is arranged at the inlet of the mixing chamber 203, and the analyzer sampling point 204 is located at the outlet of the circumrotary mixer 202, so that the sample gas from the multiple sampling ports is fully mixed before being supplied to the analyzer for analysis and measurement.
[0038] The flow sensor 205 is arranged at the lower inner wall end surface of the analysis tube 207 located in the mixing chamber 203. The flow sensor 205 is used to measure the flow of flue gas, which facilitates analysis.
[0039] The installation and working principle of the flow sensor 205 are well known in the art, and preferably, the installation and working principle of the flow sensor 205 are the same as those of the flue gas flow sensor used in the SCR denitration control system and method for flue gas of a heating furnace with the patent number CN2015101211470 and the patent name.
[0040] It should be noted that the paths of the flue gas flowing from the multiple sampling ports 301 to the circumrotary mixer 202 are the same. That is, the paths of each sampling port 301 to the circumrotary mixer 202 are the same (the flow areas of the sampling tubes 3 are the same, and the lengths are the same), which ensures that the sample gas taken by each sampling port 301 reaches the circumrotary mixer 202 at the same time, thereby providing a strong guarantee for the flue gas analyzer to accurately measure the flue gas components in the entire flue.
[0041] It is worth noting that the multiple multi-directional sampling assemblies and the sampling and analysis assembly 2 are vertically or obliquely fixedly connected to the inner wall 1 of the flue. This facilitates the flow of flue dust with good flowability and avoids deposition and blockage of the sampling circuit.
[0042] The sampling tubes 3, the sampling branch pipes 4, the sampling main pipes 5, the purge pipes 6, the circumrotary mixers 202, etc. are all arranged in the flue, and the sample gas is always in a high-temperature state, which has the following advantages:
[0043] 1) The sample gas can be prevented from being cooled, condensed, corroded, and blocked due to being introduced to the outside of the flue.
[0044] 2), so that the smoke in the sample gas is in good fluidity, can flow smoothly in the oblique sampling tube, avoid the sampling tube is blocked.
[0045] In use, the multi-directional sampling assembly and the sampling analysis assembly 2 are fixedly connected to the inner wall end surface of the inner wall 1 of the flue, when sampling and analyzing the flue gas, the flue gas passes through the plurality of sampling ports 301 and flows into the sampling branch pipes 4, the sampling main pipe 5, and then into the analyzer sampling point 204 in the sampling analysis assembly 2 for sampling and analysis. The special structure of the sampling loop composed of the multi-directional sampling assembly and the sampling analysis assembly 2 can avoid the steam generated by the boiler burst pipe from flowing into the mixing chamber, has high safety, and the obtained flue gas data is more accurate.
[0046] It is apparent for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, but can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all aspects as illustrative and not restrictive, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and range of the equivalent elements of the claims are intended to be embraced in the present application. Any reference signs in the claims should not be considered as limiting the claims involved.
[0047] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that those skilled in the art can understand.
Claims
1. A multi-point equal-volume horizontal flow flue gas sampler structure, characterized in that: Includes: A multi-directional sampling assembly is fixedly connected to the inner wall end face of the flue inner wall. The multi-directional sampling assembly is located in a plurality of equal-area squares divided in the flue inner wall. A sampling port is provided in the center of each square for sampling. The sampling and analysis component is fixedly connected to the middle end face of the multi-directional sampling component. The flue gas sampled by the multiple sampling ports is transported to the sampling and analysis component for analysis. The sampling and analysis component is connected to the analyzer.
2. The multi-point equal-volume horizontal flow smoke sampler structure according to claim 1 is characterized in that: The multi-directional sampling component includes: A plurality of sampling tubes, each having a pair of opposite end faces provided with a sampling port, wherein the plurality of sampling tubes are fixedly connected to a plurality of equal-area squares divided in the inner wall of the flue; A plurality of sampling branches are provided, and a pair of the sampling tubes is fixedly connected to each other.
3. The multi-point equal-volume horizontal flow smoke sampler structure according to claim 2, characterized in that: The sampling port parabolic surface forms an angle of 30°-60° with the flue gas flow direction.
4. A multi-point equal-volume horizontal flow smoke sampler structure according to claim 2 or 3, characterized in that: A pair of sampling branch pipes are fixedly connected to the top end surfaces thereof with a purge pipe, the sampling branch pipes are communicated with the purge pipes, the top end surfaces of the purge pipes are provided with purge interfaces, and the purge interfaces are externally connected to a purge delivery port.
5. The multi-point equal-volume horizontal flow smoke sampler structure according to claim 4 is characterized in that: A sampling main pipe is fixedly connected between the plurality of purge pipes and the sampling and analysis components, and the sampling main pipe is communicated with the sampling branch pipe.
6. The multi-point equal-volume horizontal flow smoke sampler structure according to claim 5, characterized in that: The sampling and analysis component includes: The top end surface of the analysis tube is provided with an analyzer interface; A mixing chamber is located at the end surface of the analysis tube close to the sampling tube, and the mixing chamber is integrally formed with the analysis tube; The perirotating mixer is fixedly connected to the inner wall end surface of the mixing chamber; The flow sensor is arranged on the end surface of the inner wall of the lower side of the analysis tube located in the mixing chamber.
7. The multi-point equal-volume horizontal flow smoke sampler structure according to claim 6, characterized in that: The mixing chamber is located between the perirotating mixer and the flow sensor and is provided with an analyzer sampling point.
8. A multi-point equal-volume horizontal flow smoke sampler structure according to claim 6 or 7, characterized in that: The bottom end surface of the analyzer interface is provided with a sample gas output end.
9. The multi-point equal-volume horizontal flow smoke sampler structure according to claim 8, characterized in that: The paths along which the flue gases in the plurality of sampling ports flow to the perirotating mixer are all the same.
10. A multi-point equal-volume horizontal flow smoke sampler structure according to claim 1 or 9, characterized in that: The plurality of multi-directional sampling components and sampling analysis components are fixedly connected vertically or obliquely to the inner wall of the flue.