Multi-point equivalent vertical downward flow flue gas sampler structure

Abstract

The utility model discloses a multi-point equivalent vertical downward flow flue gas sampler structure which comprises a multi-point sampling structure and an auxiliary analysis structure, the multi-point sampling structures are fixedly connected to a plurality of end surfaces in the flue, and are distributed in a plurality of areas uniformly divided by the inner wall of the flue for sampling; the auxiliary analysis structure is fixedly connected to the end face of one side of the multi-point sampling structure, the end face of one side of the auxiliary analysis structure is connected with the analyzer, and the auxiliary analysis structure is communicated with the multi-point sampling structure and is used for sampling and analyzing flue gas; wherein the auxiliary analysis structure is located on the middle end face of the multi-point sampling structure, and the paths of flue gas sampled by the multi-point sampling structure entering the auxiliary analysis structure are the same. According to the utility model, the inner wall of the flue is divided into a plurality of grids with the same area, the sampling points are arranged in each grid, multi-point sampling is adopted, the situation of missing detection is not easy to occur, and the accuracy of flue gas measurement in the flue is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to flue gas detection technical field, concretely relates to a kind of multi-point equivalent vertical downward flow direction flue gas sampler structure. BACKGROUND

[0002] Coal-fired power plant uses the combustion of coal to produce a large amount of toxic and harmful gases, such as SO2, CO2, NO, NO2, NOx, CO, benzene and gaseous organic gases. These gases are very serious pollution to the atmosphere, and the state requires coal to be desulfurized and denitrified before burning. While desulfurization and denitrification can reduce the content of S and N, it cannot completely eliminate it, so it is necessary to monitor the exhaust emission quality through gas detection, so as to effectively manage the entire combustion process. However, when sampling and detecting the flue gas flowing vertically downward in the flue, a single point is used for sampling, the flue gas is introduced into the sampling point through the cooperation of the flow guide and the rotary mixer, and is transported to the analyzer for analysis. The flow of the flue gas is measured by the flow sensor. However, because the space of the inner wall of the flue is large, only a single point is used for sampling, the sampling data is not accurate, and the situation of missing detection may occur, which cannot ensure the accuracy of sampling.

[0003] The information disclosed in this BACKGROUND section is only for the purpose of increasing the understanding of the background of the present utility model and should not be regarded as an acknowledgment or any form of suggestion that this information forms prior art that is publicly known. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims to provide a kind of multi-point equivalent vertical downward flow direction flue gas sampler structure, which can solve the problems raised in the background art.

[0005] To achieve the above-mentioned purpose, the technical scheme provided by a specific embodiment of the utility model is as follows:

[0006] A kind of multi-point equivalent vertical downward flow direction flue gas sampler structure, comprising multi-point sampling structure and auxiliary analysis structure. Multi-point sampling structure is fixedly connected to the end face of the flue, and the multi-point sampling structure is distributed in the multiple regions evenly divided on the inner wall of the flue for sampling. Auxiliary analysis structure is fixedly connected to one side end face of multi-point sampling structure, one side end face of auxiliary analysis structure is connected to analyzer, auxiliary analysis structure is communicated with multi-point sampling structure, and flue gas is sampled and analyzed.

[0007] Wherein, auxiliary analysis structure is located at the middle end face of multi-point sampling structure, and the path of flue gas sampled by multi-point sampling structure is the same.

[0008] In one or more embodiments of the utility model, the multi-point sampling structure includes a plurality of first sampling branch pipes and a plurality of second sampling branch pipes; a plurality of equal-area squares are divided in the flue inner wall; the plurality of first sampling branch pipes are evenly distributed in the plurality of equal-area square regions divided in the flue inner wall in groups of four; a plurality of second sampling branch pipes are fixedly connected to a pair of opposite end faces of the plurality of first sampling branch pipes.

[0009] In one or more embodiments of the utility model, a group of the first sampling branch pipes are fixedly connected with a collecting pipe, and a pair of the collecting pipes are fixedly connected with a second sampling branch pipe.

[0010] In one or more embodiments of the utility model, one side end face of the plurality of first sampling branch pipes is fixedly connected with an air inlet pipe, and the included angle between the air inlet pipe and the first sampling branch pipe is 30-60°.

[0011] In one or more embodiments of the utility model, a third sampling branch pipe is fixedly connected between a pair of the second sampling branch pipes, the third sampling branch pipe is connected with a sampling main pipe, a blow-by connecting pipe is arranged on the end face of the sampling main pipe penetrating through the flue inner wall, and the blow-by connecting pipe is connected with a blow-by conveying port.

[0012] In one or more embodiments of the utility model, the auxiliary analysis structure includes a mixing chamber and an analyzer interface, the bottom end face of the sampling main pipe is fixedly connected with a sampling branch pipe, the middle end face of the sampling branch pipe is fixedly connected with the mixing chamber, one side end face of the mixing chamber is fixedly connected with the analyzer interface, and the analyzer interface is connected with an analyzer.

[0013] In one or more embodiments of the utility model, a test pipe is fixedly connected to the lower side end face of the mixing chamber located at the analyzer interface.

[0014] In one or more embodiments of the utility model, a rotary mixer is arranged on the inner wall end face of the mixing chamber adjacent to the sampling main pipe.

[0015] In one or more embodiments of the utility model, a sample gas outlet end is arranged on the bottom end face of the sampling branch pipe, and a flow inducer and a flow sensor are sequentially arranged on the upper side end face of the sampling branch pipe located at the sample gas outlet end.

[0016] In one or more embodiments of the utility model, an analyzer sampling point is arranged on the inner wall of the mixing chamber between the analyzer interface and the test pipe, and the paths of flue gas in the first sampling branch pipe, the second sampling branch pipe, the third sampling branch pipe, the sampling main pipe and the rotary mixer are the same.

[0017] Compared with the prior art, the multi-point equal vertical downward flow flue gas sampler structure divides the inner wall of the flue into multiple equal-area squares, sampling points are arranged in each square, multi-point sampling is realized, the situation of missing detection is not prone to occur, and the accuracy of flue gas measurement in the flue is guaranteed. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0019] Figure 1 It is a structural schematic view of the multi-point equal vertical downward flow flue gas sampler structure in an embodiment of the present application.

[0020] Figure 2 It is Figure 1 A sectional view of the A place.

[0021] Figure 3 It is Figure 1 A sectional view of the B place.

[0022] Main drawing mark explanation:

[0023] 1--flue inner wall, 2-first sampling branch pipe, 201-pooling pipe, 202-gas inlet pipe, 3-second sampling branch pipe, 301-third sampling branch pipe; 4-sampling main pipe, 5-purging connecting pipe, 6-analyzer sampling point, 601-analyzer interface, 7-mixing chamber, 701-sampling branch pipe, 8-flow sensor, 9-sample gas outlet end, 10-test tube, 11-rotary mixer, 12-drainage device. DETAILED DESCRIPTION

[0024] In order to make the person in the art better understand the technical solutions in the present application, the following will combine the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the scope of protection of the present application.

[0025] As Figure 1As shown, the utility model discloses a kind of multi-point equal vertical downward flow direction flue gas sampler structures in an embodiment of the utility model, including multi-point sampling structure and auxiliary analysis structure, it provides strong guarantee for the flue gas analyzer accurate measurement of the flue gas component in whole flue.

[0026] Multi-point sampling structure is fixedly connected in multiple end faces in flue, and the multi-point sampling structure is distributed in multiple regions evenly divided in flue inner wall 1 and is sampled.

[0027] Auxiliary analysis structure is fixedly connected in one side end face of multi-point sampling structure, one side end face of auxiliary analysis structure is connected analyzer, auxiliary analysis structure is communicated with multi-point sampling structure, and flue gas is sampled and analyzed.

[0028] Among them, auxiliary analysis structure is located in the middle end face of multi-point sampling structure, and the flue gas in the vertical downward wind direction of sampling in flue is entered at an inclined angle, and the flue gas sampled by the multi-point sampling structure enters the same path of auxiliary analysis structure.

[0029] As shown, Figures 1-3 Multi-point sampling structure includes multiple first sampling branch pipes 2 and multiple second sampling branch pipes 3.

[0030] Multiple equal-area square regions are evenly divided in flue inner wall 1, and multiple first sampling branch pipes 2 are evenly distributed in multiple equal-area square regions divided in flue inner wall 1 in groups of four.

[0031] Preferably, the cross section of flue inner wall 1 is divided into 16 equal-area squares, and of course, it can also be divided into 4, 8, etc., according to the actual size of flue, and equal-area square regions are divided according to the actual size of flue.

[0032] Further, a group of first sampling branch pipes 2 are fixedly connected with a collecting pipe 201, that is, four second sampling branch pipes 3 are connected with each other through collecting pipe 201, to form a cross shape, and flue gas is introduced to second sampling branch pipe 3.

[0033] One side end face of multiple first sampling branch pipes 2 is fixedly connected with air inlet pipe 202, and the included angle between air inlet pipe 202 and first sampling branch pipe 2 is 30-60°. Preferably, the included angle between air inlet pipe 202 and first sampling branch pipe 2 is 45°, which can avoid water vapor generated when boiler tube bursts from flowing into mixing chamber.

[0034] A pair of second sampling branch pipes 3 are fixedly connected between the two summary pipes 201, and a third sampling branch pipe 301 is fixedly connected between a pair of second sampling branch pipes 3, and the third sampling branch pipe 301 is located at the middle end face of the second sampling branch pipe 3, and the third sampling branch pipe 301 is connected with a sampling main pipe 4 at one side end face. The third sampling branch pipe 301, the second sampling branch pipe 3, the first sampling branch pipe 2, the summary pipe 201 and the sampling main pipe 4 are in communication with each other, so that the flue gas in the flue inner wall 1 is introduced into the sampling main pipe 4 for detection.

[0035] It is worth noting that the paths of the flue gas in a group of first sampling branch pipes 2 entering the second sampling branch pipe 3, the third sampling branch pipe 301, the sampling main pipe 4 and the rotary mixer 11 are the same. Specifically, the paths of the flue gas in each first sampling branch pipe 2 to the mixer are the same, that is, the flow areas and lengths of the plurality of first sampling branch pipes 2 are the same, which ensures that the sample gas taken by each gas inlet pipe 202 reaches the rotary mixer 11 at the same time, and provides a strong guarantee for the flue gas analyzer to accurately measure the flue gas components in the entire flue.

[0036] The sampling main pipe 4 is provided with a purge connecting pipe 5 penetrating through the end face of the flue inner wall 1, the purge connecting pipe 5 is connected with a purge conveying port, a gas pump is connected through the purge conveying port to convey gas flow, and a timing purge is arranged to purge the multi-point sampling structure and the auxiliary analysis structure, so that the inside is not easy to be blocked and is convenient to maintain.

[0037] The auxiliary analysis structure includes a mixing chamber 7, an analyzer interface 601 and a test tube 10. The bottom end face of the sampling main pipe 4 is fixedly connected with a sampling branch pipe 701, the middle end face of the sampling branch pipe 701 is fixedly connected with the mixing chamber 7, the mixing chamber 7 is in communication with the sampling branch pipe 701, one side end face of the mixing chamber 7 is fixedly connected with the analyzer interface 601, the analyzer interface 601 is in communication with the mixing chamber 7, and the analyzer interface 601 is connected with an analyzer.

[0038] It is worth noting that the mixing chamber 7 is vertically arranged at the bottom end face of the sampling main pipe 4, which facilitates the flow of smoke dust with good fluidity and avoids the deposition and blockage of the mixing chamber 7.

[0039] Further, an analyzer sampling point 6 is arranged between the analyzer interface 601 and the test tube 10 on the inner wall of the mixing chamber 7, so as to realize sampling through the analyzer sampling point 6 and guarantee the accuracy of the detection result.

[0040] The mixing chamber 7 is provided with a rotary mixer 11 adjacent to the inner wall end face of the sampling main pipe 4. Specifically, the rotary mixer 11 is arranged at the inlet of the mixing chamber 7, and the analyzer sampling point 6 is located at the outlet of the rotary mixer 11, so that the sample gas entering from the plurality of gas inlet pipes 202 is fully mixed and then supplied to the analyzer for analysis and measurement.

[0041] The rotating mixer 11 comprises a motor and a driving shaft, so that the motor drives the rotation, and the flue gas is subjected to force in multiple directions, thereby achieving more uniform mixing effect. The rotating mixer 11 is a common knowledge in the art, and will not be described here.

[0042] The bottom end surface of the sampling branch pipe 701 is provided with a sample gas outlet end 9, so that the flue gas is discharged through the sample gas outlet end 9 after being detected in the mixing chamber 7.

[0043] The upper end surface of the sampling branch pipe 701 located at the sample gas outlet end 9 is sequentially provided with a flow guide 12 and a flow sensor 8, so that the flow of the flue gas in the flue gas inner wall 1 is detected when passing through the sampling branch pipe 701. The flow guide 12 is arranged on the lower end surface of the flow sensor 8, so that the sample gas flows from the gas inlet pipe 202 to the rotating mixer 11.

[0044] The installation and working principle of the flow sensor 8 are common knowledge in the art, and preferably, the flue gas flow sensor used in the patent application No. CN2015101211470, entitled "SCR denitration control system and method for flue gas of heating furnace" can be referred to.

[0045] The working principle and installation mode of the flow guide 12 are common knowledge in the art, and will not be described here.

[0046] The mixing chamber 7 is fixedly connected to the lower end surface of the analyzer interface 601, and the test tube 10 is connected to the mixing chamber 7, which facilitates the comparison of the sample gas in the later stage.

[0047] The first sampling branch pipe 2, the second sampling branch pipe 3, the sampling main pipe 4, the mixing chamber 7 and the like are all arranged in the flue gas inner wall 1, and the sample gas is always in a high temperature state, so that the sample gas can be prevented from being cooled, condensed, corroded and blocked when being introduced to the outside of the flue gas, and the smoke dust in the sample gas can be in good fluidity, so that the sample gas can flow smoothly in the sampling circuit, and the configuration of the timing purge can prevent the sampling circuit from being blocked.

[0048] In use, as shown in Figure 1 The flue gas in the flue gas inner wall 1 is introduced into the first sampling branch pipe 2 through the gas inlet pipe 202 arranged in the plurality of equal-area square regions, and then flows to the second sampling branch pipe 3, the sampling main pipe 4, the mixing chamber 7 and finally to the analyzer sampling point 6, and the analyzer connected to the analyzer interface 601 samples and analyzes the flue gas in the analyzer, and the multi-point sampling is adopted, so that the sampling data is accurate.

[0049] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0050] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A multi-point, equal-volume, vertically downward-flowing flue gas sampler structure, characterized in that, Including: A multi-point sampling structure is fixedly connected to multiple end faces inside the flue, and the multi-point sampling structure is distributed in multiple areas evenly divided on the inner wall of the flue for sampling. An auxiliary analysis structure is fixedly connected to one end face of the multi-point sampling structure. The one end face of the auxiliary analysis structure is connected to the analyzer. The auxiliary analysis structure is connected to the multi-point sampling structure to sample and analyze the flue gas. The auxiliary analysis structure is located at the middle end face of the multi-point sampling structure, and the flue gas sampled by the multi-point sampling structure enters the auxiliary analysis structure through the same path.

2. The multi-point, equal-volume, vertically downward-flowing flue gas sampler structure according to claim 1, characterized in that, Multi-point sampling structures include: Multiple first sampling branch pipes are provided, and the inner wall of the flue is divided into multiple equal-area squares. The multiple first sampling branch pipes are evenly distributed in groups of four in the multiple equal-area square areas divided in the inner wall of the flue. Multiple second sampling branches are fixedly connected to a pair of opposite end faces of multiple first sampling branches.

3. The multi-point, equal-volume, vertically downward-flowing flue gas sampler structure according to claim 2, characterized in that, Each of the first sampling branches in a group is fixedly connected to a summing tube, and each pair of summing tubes is fixedly connected to a second sampling branch.

4. A multi-point, equal-volume, vertically downward-flowing flue gas sampler structure according to claim 2 or 3, characterized in that, Each of the first sampling branches has an air inlet pipe fixedly connected to one end face, and the angle between the air inlet pipe and the first sampling branch is 30-60°.

5. The multi-point, equal-volume, vertically downward-flowing flue gas sampler structure according to claim 3, characterized in that, A third sampling branch is fixedly connected between a pair of second sampling branch pipes. The third sampling branch pipe is connected to a sampling main pipe. A purging pipe is provided on the end face of the sampling main pipe that penetrates the inner wall of the flue. The purging pipe is externally connected to a purging conveying port.

6. The multi-point, equal-volume, vertically downward-flowing flue gas sampler structure according to claim 5, characterized in that, The auxiliary analysis structure includes a mixing chamber and an analyzer interface. A sampling branch tube is fixedly connected to the bottom end face of the sampling main tube. The mixing chamber is fixedly connected to the middle end face of the sampling branch tube. The analyzer interface is fixedly connected to one side end face of the mixing chamber. An analyzer is connected to the analyzer interface.

7. The multi-point, equal-volume, vertically downward-flowing flue gas sampler structure according to claim 6, characterized in that, The mixing chamber is located on the lower end face of the analyzer interface and is fixedly connected to a test tube.

8. A multi-point, equal-volume, vertically downward-flowing flue gas sampler structure according to claim 6 or 7, characterized in that, A rotary mixer is provided on the inner wall end face of the mixing chamber near the sampling header.

9. The multi-point, equal-volume, vertically downward-flowing flue gas sampler structure according to claim 7, characterized in that, The bottom end face of the sampling tube is provided with a sample gas outlet.

10. A multi-point, equal-volume, vertically downward-flowing flue gas sampler structure according to claim 9, characterized in that, The mixing chamber has an analyzer sampling point located between the analyzer interface and the test tube on its inner wall. The flue gas in the first sampling branch enters the second sampling branch, the third sampling branch, and the sampling main pipe through the same path to the rotary mixer.

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