Multi-point equivalent vertical upward flow flue gas sampler structure
By designing a multi-point, equal-volume, vertically upward-flowing flue gas sampler structure, and employing multiple sampling branches and auxiliary analysis structures, the problem of uneven flue gas detection within the flue was solved, thereby improving the accuracy and safety of flue gas detection.
Patent Information
- Application Number
- CN202422936437.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-29
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2034-11-29
AI Technical Summary
In existing technologies, the detection of flue gas flowing vertically upwards in the flue uses single-point sampling, which leads to uneven flue gas diffusion, easy missed detection, inaccurate detection data, and low safety.
Design a multi-point equal-volume vertical upward flue gas sampler structure, including multiple sampling branches and auxiliary analysis structures. The sampling components are evenly distributed on the inner wall of the flue. By using an inclined blocking absorption port and an air inlet pipe and sampling head design at a specific angle, it is ensured that the path and flow area of each sampling head are the same, so as to achieve multi-point equal-volume sampling.
This method enables uniform sampling of flue gas within the flue, reduces missed detections, improves the accuracy and security of detection data, and ensures the precision of flue gas analysis.
Smart Images
Figure CN223611205U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to flue gas monitoring technical technical field, specifically about a kind of multi-point equivalent vertical upward flow direction flue gas sampler structure. BACKGROUND
[0002] For coal-fired power plants, flue gas online monitoring is of great significance. First, flue gas emission is one of the main sources of environmental pollution, and flue gas monitoring can help enterprises understand their own emission situation and take appropriate measures to reduce emissions and improve emission quality, reducing the impact on the environment. Secondly, harmful gases and particulate matter in flue gas cannot be ignored for human health. Flue gas monitoring can timely detect and warn abnormal conditions in flue gas emissions and take appropriate emergency measures to reduce the health risks of people. In addition, flue gas monitoring can also help enterprises better control costs and management, and improve operational efficiency.
[0003] However, the current detection of vertically upward flowing flue gas in the flue is carried out by sampling structure, which includes a flow diverter, a rotary mixer and a flow sensor. After sampling the flue gas, it is transported to an analyzer for analysis. The sampling structure is detected by a single point. However, the area of the flue inner wall is large, and the detection of only one point is not uniform, resulting in missed detection and inaccurate detection data, which leads to unqualified flue gas being discharged into the atmosphere, with low safety.
[0004] Therefore, in view of the above technical problems, it is necessary to provide a multi-point equivalent vertical upward flow direction flue gas sampler structure.
[0005] The information disclosed in this background section is intended only to increase an understanding of the general background of the present utility model and should not be construed as an acknowledgment or implication that this information constitutes prior art that is already known in the art. Content of the utility model
[0006] The utility model aims to provide a multi-point equivalent vertical upward flow direction flue gas sampler structure, which can.
[0007] In order to achieve the above-mentioned purpose, the technical scheme provided by a specific embodiment of the utility model is as follows:
[0008] A multi-point equivalent vertical upward flow direction flue gas sampler structure includes a sampling assembly, the sampling assembly includes a plurality of first sampling branch pipes, the first sampling branch pipe is connected to an auxiliary analysis structure, one side end surface of the first sampling branch pipe is inclined downward to form a flue gas suction port, and the flue gas suction port and the vertically upward flowing flue gas form an inclined blocking, and the flue gas is absorbed.
[0009] The sampling assembly is uniformly distributed in multiple areas of the inner wall of the flue for sampling.
[0010] In one or more embodiments of the utility model, the first sampling branch pipe one side end face is fixedly connected with air inlet pipe and sampling head in proper order, the sampling head is arranged in the one side end face of air inlet pipe, the included angle between air inlet pipe and sampling head is 120-160 DEG.
[0011] In one or more embodiments of the utility model, the sampling head vertical downward end face is sharp head shape.
[0012] In one or more embodiments of the utility model, the pair of opposite end faces of the bottom of sampling head form included angle, and the included angle is 20-45 DEG.
[0013] In one or more embodiments of the utility model, the inner wall of the flue is divided into multiple equal-area squares, and multiple first sampling branch pipes are uniformly distributed in multiple equal-area square regions divided by the inner wall of the flue in groups of four, and a group of first sampling branch pipes are fixedly connected with a collecting pipe, and a pair of collecting pipes are respectively connected with second sampling branch pipes.
[0014] In one or more embodiments of the utility model, a pair of second sampling branch pipes are fixedly connected with first three-way pipes, and the bottom end faces of a pair of first three-way pipes are fixedly connected with third sampling branch pipes.
[0015] In one or more embodiments of the utility model, a pair of third sampling branch pipes are fixedly connected with second three-way pipes, one side end face of the second three-way pipe is fixedly connected with a sampling main pipe, and the sampling main pipe is connected with an auxiliary analysis structure.
[0016] In one or more embodiments of the utility model, two pairs of second sampling branch pipes and a pair of third sampling branch pipes are respectively communicated with each other through first three-way pipes or second three-way pipes, forming a H-shaped form.
[0017] In one or more embodiments of the utility model, the auxiliary analysis structure includes a mixing chamber, a flow sensor, a flow diverter, an analyzer interface and a purge connection pipe, one side end face of the sampling main pipe is fixedly connected with a third three-way pipe, the bottom end face of the third three-way pipe is fixedly connected with the mixing chamber, the end face of the mixing chamber in contact with the third three-way pipe is provided with a rotary mixer, the bottom end face of the mixing chamber is fixedly connected with a sampling branch pipe, one side end face of the mixing chamber is respectively fixedly connected with an analyzer interface and a test tube, and the opposite end face of the third three-way pipe in the sampling main pipe is fixedly connected with a purge connection pipe.
[0018] In one or more embodiments of the utility model, the mixed chamber and the first three-way pipe and the sampling branch pipe contact part end face are all trapezoidal, the mixed chamber is greater than the sampling branch pipe in the projection of horizontal plane.
[0019] Compared with the prior art, the multi-point equal vertical upward flow to the flue gas sampler structure can realize the setting of multiple area detection in the inside of the flue, is not prone to the situation of missing detection, provides guarantee for the accuracy of flue gas measurement, and is high in safety. BRIEF DESCRIPTION OF DRAWINGS
[0020] 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 embodiment or prior art description will be briefly introduced, and obviously, the drawings in the following description are only some embodiments in the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without creative labor.
[0021] Figure 1 It is the structural schematic diagram of a multi-point equal vertical upward flow to the flue gas sampler structure in an embodiment of the utility model;
[0022] Figure 2 It is the A section view of Figure 1
[0023] Figure 3 It is the B section view of Figure 1
[0024] MAIN REFERENCE NUMERALS EXPLANATION
[0025] 1--flue inner wall, 2-first sampling branch pipe, 201-collector pipe, 202-inlet pipe, 203-sampling head, 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-mixed chamber, 701-sampling branch pipe, 8-flow sensor, 9-sample gas outlet end, 10-test pipe, 11-rotary mixer, 12-drainage device, 13-first three-way pipe, 14-second three-way pipe, 15-third three-way pipe. DETAILED DESCRIPTION
[0026] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this utility model.
[0027] like Figures 1-2 As shown, a multi-point equal-volume vertically upward-flowing flue gas sampler structure in one embodiment of this utility model includes a sampling component. The sampling component includes multiple first sampling branches 2, which are connected to an auxiliary analysis structure. One end face of the first sampling branch 2 is inclined downward to form a flue gas absorption port. An inclined block is formed between the flue gas absorption port and the vertically upward-flowing flue gas to absorb the flue gas. That is, when the flue gas flows upward, it passes through the inclined flue gas absorption port and can flow upward from the flue gas absorption port into the first sampling branch 2 for further flow.
[0028] The sampling components are evenly distributed in multiple areas within the inner wall 1 of the flue to collect samples, enabling multi-point sampling, reducing the likelihood of missed detections, and ensuring accurate test data.
[0029] An air inlet pipe 202 and a sampling head 203 are fixedly connected to one end face of the first sampling branch pipe 2 in sequence. The first sampling branch pipe 2, the air inlet pipe 202 and the sampling head 203 are interconnected. The sampling head 203 is inclinedly arranged on one end face of the air inlet pipe 202. The included angle between the air inlet pipe 202 and the sampling head 203 is 120-160°.
[0030] Furthermore, the vertically downward end face of the sampling head 203 is pointed. An angle of 20-45° is formed between a pair of opposing end faces at the bottom of the sampling head 203. Through the special shape design of the air inlet pipe 202 and the sampling head 203, it is possible to prevent water vapor generated during boiler tube rupture from flowing into the mixing chamber, and also to prevent flue gas from directly entering the sampling port using fluid kinetic energy.
[0031] Preferably, the included angle between the air intake pipe 202 and the sampling head 203 is 150 degrees, and the included angle between a pair of opposite end faces at the bottom of the sampling head 203 is 30 degrees.
[0032] The inner wall of the flue is divided into multiple equal-area squares, that is, the cross-section of the flue is divided into multiple equal-area squares. Preferably, 16 equal-area squares are used. Of course, it can also be divided into 4, 8, etc., depending on the size of the flue cross-section.
[0033] The plurality of first sampling branch pipes 2 are evenly distributed in the plurality of equal-area square regions divided by the inner wall of the flue in groups of four. A group of first sampling branch pipes 2 is fixedly connected with a collecting pipe 201. A pair of collecting pipes 201 is respectively connected with a second sampling branch pipe 3.
[0034] A pair of second sampling branch pipes 3 is fixedly connected with a first three-way pipe 13. The bottom end surface of a pair of first three-way pipes 13 is fixedly connected with a third sampling branch pipe 301. That is, a pair of second sampling branch pipes 3 are connected with each other through the first three-way pipe 13. The bottom end surface of the first three-way pipe 13 is connected with the third sampling branch pipe 301, forming a T-shaped communication pipe.
[0035] As shown in Figure 1 Further, two pairs of second sampling branch pipes 3 and a pair of third sampling branch pipes 301 are respectively connected with each other through the first three-way pipe 13 or the second three-way pipe 14, forming a H-shaped structure. That is, a group of first sampling branch pipes 2 is connected with a second sampling branch pipe 3 through the collecting pipe 201, and then connected with a third sampling branch pipe 301 through the first three-way pipe 13. A pair of third sampling branch pipes 301 are connected with each other through the second three-way pipe 14, finally forming a H-shaped structure and being connected with each other.
[0036] A pair of third sampling branch pipes 301 is fixedly connected with a second three-way pipe 14. The side end surface of the second three-way pipe 14 is fixedly connected with a sampling main pipe 4. The sampling main pipe 4 is connected with an auxiliary analysis structure
[0037] It is worth noting that the paths of 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 flue gas in each first sampling branch pipe 2 to the rotary mixer 11 are the same. That is, a sampling head 203 is arranged at the center of each square. The path of each sampling head 203 to the rotary mixer 11 is the same. The flow area and length of the first sampling branch pipe 2, the second sampling branch pipe 3, and the sampling main pipe 4 are the same, which ensures that the sample gas taken by each sampling head 203 reaches the rotary mixer 11 at the same time, providing a strong guarantee for the accurate measurement of flue gas components in the entire flue by the flue gas analyzer.
[0038] As shown in Figure 3 The auxiliary analysis structure includes a mixing chamber 7, a flow sensor 8, a flow diverter 12, an analyzer interface 601, and a purge connection pipe 5. The side end surface of the sampling main pipe 4 is fixedly connected with a third three-way pipe 15. The bottom end surface of the third three-way pipe 15 is fixedly connected with the mixing chamber 7. The third three-way pipe 15 is connected with the mixing chamber 7. The bottom end surface of the mixing chamber 7 is fixedly connected with a sampling branch pipe 701.
[0039] The end surface of the mixing chamber 7 in contact with the third three-way pipe 15 is provided with a rotary mixer 11, and the inner wall of the mixing chamber 7 is provided with an analyzer sampling point 6 between the analyzer interface 601 and the test tube 10, so that sampling is realized through the analyzer sampling point 6, and the accuracy of the detection result is ensured. Specifically, the inlet of the mixing chamber 7 is provided with the rotary mixer 11, 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 sampling heads 203 is fully mixed and then transported through the analyzer interface 601 for analysis and measurement by the analyzer.
[0040] The installation and principle of the rotary mixer 11 are well known in the art, and will not be described here.
[0041] The third three-way pipe 15 is fixedly connected to the purge pipe 5 at the opposite end surface of the sampling main pipe 4, the purge pipe 5 penetrates through one side end surface of the flue inner wall 1, and the purge pipe 5 is connected to a negative pressure gas flow delivery end. The negative pressure gas flow is delivered into the sampling main pipe 4 through the purge pipe 5, so that timed purging is realized, and operation and maintenance are facilitated.
[0042] The mixing chamber 7 is fixedly connected with the analyzer interface 601 and the test tube 10 at one side end surface, respectively. The analyzer interface 601 and the test tube 10 penetrate through one side end surface of the flue inner wall 1, the test tube 10 is located at the lower side end surface of the analyzer interface 601, and the analyzer interface 601 and the test tube 10 are in communication with the mixing chamber 7. The analyzer interface 601 is connected to an analyzer, and the flue gas is detected. The test tube 10 is used for comparison of the sample gas, and the sampling positions of the test tube 10 and the analyzer interface 601 are different, so that the accuracy of the detection data can be improved.
[0043] The sampling branch pipe 701 is provided with a flow sensor 8 at the bottom end surface of the mixing chamber 7, so that the flow of the flue gas is monitored.
[0044] The sampling branch pipe 701 is fixedly connected with a flow diverter 12 at the lower side end surface of the flow sensor 8, and the sampling branch pipe 701 is fixedly connected with a sample gas outlet end 9 at the bottom end surface. Specifically, the flow diverter 12 is arranged at the sample gas outlet between the sampling branch pipe 701 and the sample gas outlet end 9, so that the sample gas flows from the sampling head 203 to the rotary mixer 11, and better detection is realized.
[0045] The end surfaces of the mixing chamber 7 in contact with the first three-way pipe 13 and the sampling branch pipe 701 are all trapezoidal, and the projection of the mixing chamber 7 on the horizontal plane is larger than the projection of the sampling branch pipe 701 on the horizontal plane.
[0046] In use, for example, Figure 1As shown, the flue gas in the inner wall 1 is sampled by the sampling assembly arranged in the plurality of equal-area square grid areas, the vertically upward flowing flue gas enters the sampling head 203, sequentially flows to the second sampling branch pipe 3, the first three-way pipe 13, the third sampling branch pipe 301, the second three-way pipe 14, the sampling main pipe 4, the third three-way pipe 15, and finally flows to the analyzer sampling point 6, and is sampled and analyzed by the analyzer connected through the analyzer interface 601, the multiple areas are simultaneously sampled, the sampling data is accurate, the missed detection is not easy to occur, and the safety is high.
[0047] It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, 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 scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims.
[0048] 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, those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be properly combined to form other embodiments that those skilled in the art can understand.
Claims
1. A multi-point equivalent vertical upward flow to a flue gas sampler structure, characterized by, The sampling assembly comprises a plurality of first sampling branches connected to an auxiliary analysis structure, and one side end surface of the first sampling branch is inclined downward to form a flue gas suction port, which forms an inclined block with the vertically upward flowing flue gas to absorb the flue gas. The sampling assembly is uniformly distributed in a plurality of regions on the inner wall of the flue for sampling.
2. A multi-point equivalent vertical upward flow to flue gas sampler structure according to claim 1, characterized in that, The first sampling branch is sequentially fixedly connected with an air inlet pipe and a sampling head, the sampling head is inclined to be arranged on one side end surface of the air inlet pipe, and the included angle between the air inlet pipe and the sampling head is 120-160°.
3. A multi-point equi-amount vertical upward flow to flue gas sampler structure according to claim 2, characterized in that, The vertical downward end surface of the sampling head is in the shape of a sharp head.
4. A multi-point equi-amount vertical upward flow to flue gas sampler structure according to claim 2, characterized in that, An included angle is formed between a pair of opposite end surfaces of the bottom of the sampling head, and the included angle is 20-45°.
5. A multi-point equi-amount vertical upward flow to flue gas sampler structure according to claim 3 or 4, characterized in that, The inner wall of the flue is equally divided into a plurality of equal-area squares, and a plurality of the first sampling branches are uniformly distributed in the plurality of equal-area square regions divided by the inner wall of the flue in groups of four.
6. A multi-point equi-amount vertical upward flow to flue gas sampler structure according to claim 5, characterized in that, A pair of the second sampling branches are fixedly connected with a first three-way pipe, and a pair of bottom end surfaces of the first three-way pipe are fixedly connected with a third sampling branch.
7. A multi-point equi-amount vertical upward flow to flue gas sampler structure according to claim 6, characterized in that, A pair of the third sampling branches are fixedly connected with a second three-way pipe, and one side end surface of the second three-way pipe is fixedly connected with a sampling main pipe.
8. A multi-point equi-amount vertical upward flow to flue gas sampler structure according to claim 7, characterized in that, Two pairs of the second sampling branches and a pair of the third sampling branches are respectively connected with each other through the first three-way pipe or the second three-way pipe to form a H-shaped structure.
9. A multi-point equi-amount vertical upward flow to flue gas sampler structure according to claim 8, characterized in that, The auxiliary analysis structure comprises a mixing chamber, a flow sensor, a flow diverter, an analyzer interface, and a purge connection pipe.
10. A multi-point equi-amount vertical upward flow to flue gas sampler structure according to claim 9, characterized in that, The bottom end surface of the third three-way pipe is fixedly connected with the mixing chamber, the end surface of the mixing chamber in contact with the third three-way pipe is provided with a rotary mixer, the bottom end surface of the mixing chamber is fixedly connected with a sampling branch pipe, one side end surface of the mixing chamber is fixedly connected with an analyzer interface and a test pipe, respectively, and the opposite end surface of the third three-way pipe located in the sampling main pipe is fixedly connected with a purge connection pipe. The part of the end surface of the mixing chamber in contact with the first three-way pipe and the sampling branch pipe is trapezoidal, and the projection of the mixing chamber on the horizontal plane is larger than the projection of the sampling branch pipe on the horizontal plane.