Uniform sampling device for flue gas emission monitoring

Abstract

The present invention discloses a uniform sampling device for flue gas emission monitoring, which relates to the technical field of flue gas emission monitoring. The present invention provides a plurality of channels in a sampling box, each channel is connected to each area of ​​an upstream flue through a pipeline, and the other end of the sampling box is connected to a downstream flue, and each channel is monitored, thereby realizing the monitoring of each area in the upstream flue. The present invention monitors each area of ​​the flue with a lower cost solution.

Description

Technical Field

[0001] The invention relates to the technical field of smoke emission monitoring, in particular to a uniform sampling device for smoke emission monitoring. Background Art

[0002] There are strict standards for the emission of waste flue gas. In order to avoid violations, factories need to monitor the flue gas when emitting it. However, it is not enough to set up one monitoring point, but multiple monitoring points need to be set up. At present, multi-point sampling monitoring requires the use of multiple sets of equipment, which requires an increase in equipment investment costs, and maintenance and replacement are more difficult. Summary of the invention

[0003] The present invention proposes a uniform sampling device for flue gas emission monitoring, comprising a plurality of sampling cannulas, a plurality of first sampling branches, a sampling box, a sampling rod, and a flue gas monitoring instrument; the plurality of sampling cannulas are arranged in the upstream flue of the waste flue gas for extracting flue gas at multiple points; the first sampling branches are connected to the sampling cannulas in a one-to-one correspondence, and the other end of the first sampling branch is connected to the sampling box; a plurality of partitions are arranged in the sampling box, and the plurality of partitions at least form a plurality of independent channels; the first sampling branch corresponds to each independent channel and is connected thereto; one end of the sampling box away from the first sampling branch is connected to the downstream flue of the waste flue gas; the sampling rod is inserted into the sampling box from outside the sampling box, and a perforation is arranged in the middle of the partition for passing the sampling rod; a sampling port is arranged at one end of the sampling rod located in the sampling box, and one end of the sampling rod located outside the sampling box is connected to a telescopic device, and the telescopic device is used to drive the sampling rod to move back and forth along its axis; the end of the sampling rod located outside the sampling box is also connected to the flue gas monitoring instrument.

[0004] The present invention is further configured as follows: it also includes a plurality of second sampling branch tubes, which are connected to the sampling cannulas one by one, and the other ends of the second sampling branch tubes are gathered together to connect to the sampling box; the partition also forms a uniform channel, and the second sampling branch tubes correspond to the uniform channel and are connected thereto.

[0005] The present invention is further configured as follows: the telescopic device can adopt a pneumatic, electric or hydraulic telescopic cylinder.

[0006] The beneficial technical effects of the present invention are:

[0007] 1. Not only can the waste flue gas in each area of ​​the upstream flue be monitored separately, but the entire area can also be monitored.

[0008] 2. You only need to install the sampling tube on the flue. The installation and subsequent maintenance and replacement are very easy and the operation process is simple.

[0009] 3. Only one flue gas monitoring instrument is needed to realize monitoring and analysis of multiple areas.

[0010] 4. When monitoring the flue gas in a single area, there is no need to close the sampling branches in other areas through valve equipment. All branches and channels have flue gas flowing at any time, thus avoiding the blockage of the sampling branches by fly ash in the flue gas due to the stagnation of flue gas in other sampling branches. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the present invention.

[0012] Figure numerals: 1. upstream flue of waste flue gas; 2. downstream flue of waste flue gas; 3. sampling tube; 4. first sampling branch pipe; 5. second sampling branch pipe; 6. sampling box; 61. partition; 71. sampling rod; 72. telescopic device; 8. flue gas monitoring instrument. DETAILED DESCRIPTION

[0013] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0014] The present invention proposes a uniform sampling device for flue gas emission monitoring, which includes a plurality of sampling cannulas 3, a plurality of first sampling branches 4, a plurality of second sampling branches 5, a sampling box 6, a sampling rod 71, and a flue gas monitoring instrument 8.

[0015] A plurality of sampling cannulas 3 are evenly arranged in the upstream flue 1 of the waste flue gas, and are used to extract the flue gas at multiple points. The number of the sampling cannulas 3 can be adjusted according to actual conditions.

[0016] The first sampling branch tube 4 is connected to the sampling cannula 3 in a one-to-one correspondence, and the other end of the first sampling branch tube 4 is connected to the sampling box 6. A plurality of partitions 61 are arranged in parallel along a straight line, and a plurality of independent channels and a uniform channel are formed between the plurality of partitions 61. The number of independent channels is consistent with the number of the first sampling branch tubes 4, and the first sampling branch tubes 4 correspond to and are connected to the independent channels. The second sampling branch tubes 5 are connected to the sampling cannula 3 in a one-to-one correspondence, but the other ends of the second sampling branch tubes 5 converge together to connect the sampling box 6, and the second sampling branch tubes 5 correspond to and are connected to the uniform channel.

[0017] The end of the sampling box 6 away from the first sampling branch pipe 4 is connected to the downstream flue 2 of the waste flue gas through an outlet pipe. Since there is a pressure difference between the upstream flue 1 of the waste flue gas and the downstream flue 2 of the waste flue gas, the flue gas can flow to the downstream flue 2 of the waste flue gas through the sampling box 6 under the action of the pressure difference.

[0018] The sampling rod 71 is inserted from the outside of the sampling box 6 into the sampling box 6, and the connection between the sampling rod 71 and the sampling box 6 is sealed. A perforation is set in the middle of the partition 61 for passing the sampling rod 71. The end of the sampling rod 71 located in the sampling box 6 is provided with a sampling port, and the end of the sampling rod 71 located outside the sampling box 6 is connected to a telescopic device 72, which is used to drive the sampling rod 71 to reciprocate along its axis. The telescopic device 72 can adopt a pneumatic, electric or hydraulic telescopic cylinder. At the same time, the end of the sampling rod 71 located outside the sampling box 6 is also connected to the flue gas monitoring instrument 8 through a hose.

[0019] When the telescopic device 72 drives the sampling rod 71 to move, the sampling port will correspond to different independent channels or to a uniform channel. The flue gas in the channel will enter the sampling rod 71 from the sampling port, and then reach the flue gas monitoring instrument 8 through the hose. The flue gas monitoring instrument 8 will sample and analyze the flue gas to analyze NOx, SO2, O2, dust and other flue gas pollutants.

[0020] In summary, the present invention can monitor the flue gas indicators of different areas in the upstream flue 1 of the waste flue gas, and can also monitor the average value of the entire area in the upstream flue 1 of the waste flue gas.

[0021] Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced by equivalents without departing from the scope of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0022] In the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0023] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] The term "comprise" or any other similar term is intended to cover a non-exclusive inclusion, such that a process, article, or apparatus / device that includes a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, article, or apparatus / device.

[0025] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A uniform sampling device for flue gas emission monitoring, characterized in that: The invention comprises a plurality of sampling cannulas (3), a plurality of first sampling branch tubes (4), a sampling box (6), a sampling rod (71), and a flue gas monitoring instrument (8); the plurality of sampling cannulas (3) are arranged in an upstream flue (1) of waste flue gas and are used for extracting flue gas at multiple points; the first sampling branch tubes (4) are connected to the sampling cannulas (3) in a one-to-one correspondence, and the other end of the first sampling branch tubes (4) is connected to the sampling box (6); a plurality of partitions (61) are arranged in the sampling box (6), and the plurality of partitions (61) form at least a plurality of independent channels; the first sampling branch tubes (4) correspond to the independent channels respectively and are connected thereto; the end of the sampling box (6) facing away from the first sampling branch tube (4) is connected to the downstream flue (2) of waste flue gas; the sampling rod (71) penetrates from the outside of the sampling box (6) into the inside of the sampling box (6), and a through hole is arranged in the middle of the partition (61). The sampling rod (71) has a hole for passing through; one end of the sampling rod (71) located inside the sampling box (6) is provided with a sampling port, and one end of the sampling rod (71) located outside the sampling box (6) is connected to a telescopic device (72), and the telescopic device (72) is used to drive the sampling rod (71) to reciprocate along its axis; the end of the sampling rod (71) located outside the sampling box (6) is also connected to a flue gas monitoring instrument (8); it also includes a plurality of second sampling branch pipes (5), the second sampling branch pipes (5) are connected to the sampling cannula (3) one by one, and the other ends of the second sampling branch pipes (5) are converged together and connected to the sampling box (6); the partition (61) is also formed with a uniform channel, and the second sampling branch pipes (5) correspond to the uniform channel and are connected thereto; the telescopic device (72) can adopt a pneumatic, electric or hydraulic telescopic cylinder.

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