CN106124406B

CN106124406B - In-situ detection device for flue gas

Info

Publication number: CN106124406B
Application number: CN201610708492.9A
Authority: CN
Inventors: 汪升; 高鑫; 姚佳佳; 吴渝; 徐勇
Original assignee: Hefei Gold Star M & E Technical Development Co Ltd
Current assignee: Hefei Gstar Intelligent Control Technical Co Ltd
Priority date: 2016-08-23
Filing date: 2016-08-23
Publication date: 2020-01-03
Anticipated expiration: 2036-08-23
Also published as: CN106124406A

Abstract

The invention relates to the technical field of gas detection, and particularly discloses an in-situ detection device for flue gas, which is characterized in that: including the sleeve pipe that crosses the both sides pipe wall of flue gas pipeline and arrange, the sleeve pipe is located the pipe body symmetry in the flue gas pipeline and has seted up the opening that link up the pipe wall in order to supply the flue gas to flow through, and optical detection component has been arranged to sheathed tube one end department, and the optical equipment of reflection or receiving light source has been arranged to sheathed tube other end department, and the intraductal optical lens that supplies to detect light to see through, and the separation flue gas gets into the lumen from the opening part that is arranged. Compared with the prior art, the invention adopts the sleeve to cross the pipe walls at the two sides of the flue gas pipeline, thus ensuring that the optical detection components and the optical equipment at the two ends of the sleeve with a straight central line can well realize the calibration of the light path of the probe, and further ensuring the reliability of the detection result. The invention has simple structure and convenient installation.

Description

In-situ detection device for flue gas

Technical Field

The invention relates to the field of gas detection, in particular to an in-situ detection device for smoke.

Background

The method aims at detecting the smoke in the smoke pipeline of the smelting furnace in the metal smelting process so as to provide relevant basis for the control of the smelting process. In the prior art, the detection of the smoke in the smoke pipeline can be divided into in-situ detection (namely, a detection probe is directly placed in the smoke pipeline for detection) and detection after the smoke is led out, wherein the in-situ detection equipment mainly comprises detection probes symmetrically arranged on the pipe walls at two sides of the flue gas pipeline, window lenses for transmitting detection light are arranged in the detection pipe cavities of the two detection probes, thus, the smoke components can be obtained by detecting with the help of the optical detection component outside the smoke pipeline and then carrying out operation and analysis through the data processing equipment, when the optical component at one detection probe emits the detection light, according to the requirements of detection optical path and the like, the other detection probe can be an optical component for receiving the light information, and can also be an optical component for reflecting the light information, so that the optical component for emitting the detection light receives the reflected light information. The method for installing the detection probe in the original position not only can improve the convenience, the continuity and the implementation of the flue gas monitoring, but also has a simpler structure. However, the harsh environment in the flue also brings a serious test to the in-situ installation of the detection equipment, and for the flue gas environment with high dust concentration and high flue gas temperature and high humidity, the concentricity of the two detection probes is difficult to ensure no matter the two detection probes are installed or normally used, so that the optical path transmission is deviated. Therefore, the concentricity of the detection probes symmetrically arranged on the two sides of the flue is ensured, which is one of the prerequisites for ensuring the accuracy of flue gas detection.

Disclosure of Invention

The invention aims to provide the in-situ smoke detection device which is simple in structure and convenient to use.

In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides an in situ detection device of flue gas which characterized in that: including the sleeve pipe that crosses the both sides pipe wall of flue gas pipeline and arrange, the sleeve pipe is located the pipe body symmetry in the flue gas pipeline and has seted up the opening that link up the pipe wall in order to supply the flue gas to flow through, and optical detection component has been arranged to sheathed tube one end department, and the optical equipment of reflection or receiving light source has been arranged to sheathed tube other end department, and the intraductal optical lens that supplies to detect light to see through, and the separation flue gas gets into the lumen from the opening part that is arranged.

The beneficial effect that adopts above-mentioned technical scheme to produce lies in: compared with the prior art, the invention adopts the sleeve to cross the pipe walls at the two sides of the flue gas pipeline, thus ensuring that the optical detection components and the optical equipment at the two ends of the sleeve with a straight central line can well realize the calibration of the light path of the probe, and further ensuring the reliability of the detection result. The invention has simple structure and convenient installation.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a view of the installation of the present invention;

fig. 3 and 4 are enlarged views of the portions I and J of fig. 2, respectively.

Detailed Description

An in-situ detection device for flue gas is shown in fig. 1-4, and comprises a sleeve 10 traversing pipe walls on two sides of a flue gas pipeline a, wherein the sleeve 10 is positioned on a pipe body in the flue gas pipeline a and symmetrically provided with openings 11 penetrating through the pipe walls for flue gas to flow through, an optical detection component B is arranged at one end of the sleeve 10, optical equipment for reflecting or receiving a light source is arranged at the other end of the sleeve 10, and an optical lens for detecting light transmission and blocking flue gas from entering a pipe cavity from the openings 11 is arranged in the sleeve 10. Compared with the prior art, the sleeve 10 is arranged to cross the pipe walls on the two sides of the flue gas pipeline A, so that for the sleeve 10 with a straight central line, the optical detection component B and the optical equipment at the two ends of the sleeve can well realize the calibration of the probe light path to realize the coaxiality of the light path, and further the reliability of the detection result is ensured. In particular, it is necessary to arrange optical devices for reflecting or receiving light sources at one end of the sleeve according to actual needs, which devices are well known to those skilled in the art from conventional knowledge, so that the optical devices to be arranged at one end of the sleeve 10 are not shown in the drawings. In addition, through the arrangement of the optical lenses, the cleanliness of windows at the probe end (namely, at the two ends of the sleeve) can be ensured, and further the reliable detection of smoke components can be ensured.

The specific scheme is that as shown in fig. 1-4, a first detection tube 20 and a second detection tube 30 are respectively inserted into lumens at two ends of a sleeve 10, the first detection tube 20 and the second detection tube 30 are concentric with the sleeve 10, an optical detection component B is arranged at a tube end of the first detection tube 20 located outside a smoke duct a, an optical device for reflecting or receiving a light source is arranged at a tube end of the second detection tube 30 located outside the smoke duct a, and a first lens 21 and a second lens 22 for transmitting detection light are respectively obliquely arranged in lumens at two ends of the first detection tube 20. The first detection tube 20 and the second detection tube 30 are independently arranged in the sleeve 10, so that the concentricity of the first detection tube 20 and the second detection tube 30 can be ensured through the supporting and restraining effects of the sleeve 10, the light path is further ensured to be coaxial, and then components such as optical lenses and the like are correspondingly arranged in the first detection tube 20 and the second detection tube 30, which is very convenient. In addition, the first and

second lenses

21, 22 are respectively arranged in the lumens at the two ends of the first detection tube 20, so that the second lens 22 is positioned in the flue gas pipeline B, the temperature of the second lens is the same as the temperature of the flue gas in the pipeline, thereby preventing the phenomenon of water vapor condensation, and in addition, the first and

second lenses

21, 22 can be in a vacuum state or a sealing state, so that the cleanliness of the mirror surface of the first lens 21 close to the optical detection component B can be ensured even though the first lens 21 is positioned in a cooler environment outside the flue gas pipeline B, meanwhile, the first and

second lenses

21, 22 are obliquely arranged in the lumens, thereby effectively avoiding the interference of light reflection, and further ensuring the accuracy of gas concentration detection.

As a further preferred embodiment: as shown in fig. 1-4, the tube cavity of the sleeve 10 at both ends of the opening 11 is respectively provided with a first and a

second glass slides

40, 40a to block the smoke from entering the tube cavity from the opening 11, the sleeve 10 is formed by an inner layer and an outer layer to form a sandwich structure, the sandwich cavity between the inner layer 10a and the outer layer 10b of the sleeve 10 forms an air blowing pipe 12, the gap formed by cutting the inner layer 10a and the outer layer 10b at the opening 11 is provided with a sealing plate 17 to block the gas in the air blowing pipe 12 from flowing out, the air inlet 13 of the air blowing pipe 12 is located outside the smoke pipe a, the air outlet 14 of the air blowing pipe 12 is close to the first and the

second glass slides

40, 40a, and the air curtain blown out from the air outlet 14 by the air blowing pipe 12 separates the to-be-blown surfaces of the first and the

second glass slides

40, 40a from the smoke in the. Through the arrangement of the air blowing pipe 12, when air is blown into the air blowing pipe 12, the air curtain blown out from the air outlet 14 can separate the surfaces to be blown of the first and

second glass slides

40 and 40a from the smoke in the smoke pipe a, that is, the area where the front ends of the surfaces to be blown of the first and

second glass slides

40 and 40a are located can be blown, so that dust and water vapor in the smoke can be effectively prevented from being deposited and condensed on the surfaces to be blown of the first and

second glass slides

40 and 40a, that is, the surfaces where the first and second glass slides 40 and 40a directly face the smoke, and the detection light can be ensured to accurately and reliably penetrate through the first and

second glass slides

40 and 40 a. It should be noted that the sealing plate 17 is disposed to prevent gas from flowing out from the gap between the inner layer 10a and the outer layer 10b at the opening, as shown in fig. 3 and 4.

Further, as shown in fig. 1 to 4, the first and

second partition plates

15 and 15a are respectively disposed in the tube cavities of the cannula 10 at the two ends of the opening 11, the plate surfaces of the first and

second partition plates

15 and 15a are perpendicular to the tube length of the cannula 10, the first and

second partition plates

15 and 15a are respectively disposed at the front ends of the to-be-cleaned surfaces of the first and

second slides

40 and 40a, and the middle portions of the first and

second partition plates

15 and 15a are provided with openings for passing the detection light. Through the arrangement of the partition plates, under the action of a channel between the glass slides and the partition plates, the direction of the purging air flow is parallel to the upward flowing direction of the flue gas, and the purging air flow or the air curtain is formed between the flue gas and the glass slides, so that the cleanliness of the surfaces to be purged of the first glass slide 40 and the second glass slide 40a can be ensured, and meanwhile, the purging range of the air flow can be effectively controlled, thereby avoiding the interference of the purging air flow on the flowing of the flue gas, and ensuring the stability of light path transmission.

As shown in fig. 1-4, a first air outlet 14a communicated with the air blowing pipeline 12 is formed on the side wall of the inner layer 10a of the sleeve 10 positioned between the first slide 40 and the first partition 15, a first air outlet 16a penetrating through the inner layer 10a and the outer layer 10b is formed on the side wall of the sleeve 10, and the first air outlet 16a and the first air outlet 14a are correspondingly arranged up and down to form a vertical air curtain for blowing, wherein the air curtain divides the surface to be blown of the first slide 40 from the flue gas; the side wall of the inner layer 10a of the sleeve 10 between the second slide 40a and the second partition 15a is provided with a second air outlet 14b communicated with the air blowing pipeline 12, the side wall of the sleeve 10 is provided with a second air outlet 16b penetrating through the inner layer 10a and the outer layer 10b, and the second air outlet 16b and the second air outlet 14b are correspondingly arranged up and down to form a vertical air curtain for blowing, and the air curtain separates the surface to be blown of the second slide 40a from the flue gas. Through the arrangement of the specific structure, the clean air curtain in the area between the surface to be swept and the flue gas of the sweeping slide flows from the air outlet to the air outlet from bottom to top, the sweeping direction of the air curtain is parallel to and spaced from the flowing direction of the flue gas in the flue gas pipeline A, so that the air flow sweeping cannot cause interference on the flowing of the flue gas, and the accuracy of flue gas detection is further ensured.

As shown in fig. 1 to 4, the first and

second air outlets

14a, 14b and the first and

second air outlets

16a, 16b on the sleeve 10 are all strip-shaped holes, and each strip-shaped hole is opened along the circumferential direction of the sleeve 10. The relation between the air outlet and the air outlet can also refer to an invention patent which is filed by the applicant on the same day and is named as a smoke detection probe, wherein the air outlet and the air outlet are strip-shaped holes formed along the circumferential direction of the sleeve 10, so that the air curtain can be limited, the blown air flow is mainly discharged from the air outlet, and the air flowing through the middle opening of the partition plate is less.

Specifically, as shown in fig. 2 to 4, the outer portions of the two ends of the sleeve 10 are further sleeved with a mounting tube 50, a tube opening at one end of the mounting tube 50 is fixedly connected with a tube body of the sleeve 10 or an end portion of the detection tube by a flange, the other end of the mounting tube 50 is located in the flue gas duct a, and the tube body of the mounting tube 50 and a hole wall of a mounting hole formed in the opposite side wall of the flue gas duct a form a sealing fit. The detection probe is installed on the flue gas pipeline A through the installation pipe 50, the installation is reliable, and in addition, in order to ensure the stability of the installation structure, a heat insulation pad is uniformly arranged at the flange joint surface of each flange connection, as shown in figure 1.

Claims

1. The utility model provides an in situ detection device of flue gas which characterized in that: the device comprises a sleeve (10) which crosses the pipe walls of two sides of a flue gas pipeline (A) and is arranged, an opening (11) which penetrates through the pipe walls to allow flue gas to flow through is symmetrically formed in a pipe body of the sleeve (10) positioned in the flue gas pipeline (A), an optical detection component (B) is arranged at one end of the sleeve (10), optical equipment which reflects or receives a light source is arranged at the other end of the sleeve (10), an optical lens which allows detection light to penetrate through and prevents the flue gas from entering the pipe cavity from the opening (11) is arranged in the sleeve (10), and first and second glass slides (40 and 40a) are respectively arranged in the pipe cavity of the sleeve (10) positioned at two ends of the opening (11) to prevent the flue gas from entering the pipe cavity from the opening (11);

the sleeve (10) is of a sandwich structure formed by an inner layer and an outer layer, a clamping cavity between the inner layer (10a) and the outer layer (10b) of the sleeve (10) forms an air blowing pipeline (12), an air outlet (14) of the air blowing pipeline (12) is close to the first glass slide and the second glass slide (40 and 40a), and the air curtain blown out from the air outlet (14) by the air blowing pipeline (12) separates the surfaces to be blown of the first glass slide and the second glass slide (40 and 40a) from the smoke in the smoke pipeline (A);

the tube cavities at two ends of the sleeve (10) are respectively inserted with a first detection tube (20) and a second detection tube (30), the first detection tube (20) and the second detection tube (30) are concentric with the sleeve (10), the optical detection component (B) is arranged at the tube end part of the first detection tube (20) positioned outside the smoke pipeline (A), the optical equipment for reflecting or receiving a light source is arranged at the tube end part of the second detection tube (30) positioned outside the smoke pipeline (A), the tube cavities at two ends of the first detection tube (20) are respectively and obliquely provided with a first lens (21) and a second lens (22) for detecting light transmission, and the first lens (21) and the second lens (22) are in a vacuum shape or a sealing shape.

2. The in-situ flue gas detection device of claim 1, wherein: the inner layer (10a) and the outer layer (10b) are positioned at the opening (11) and are cut to form a gap, a sealing plate (17) is arranged in the gap to block gas in the gas blowing pipeline (12) from flowing out, and a gas inlet (13) of the gas blowing pipeline (12) is positioned outside the smoke pipeline (A).

3. The in-situ flue gas detection device according to claim 2, wherein: the first and second partition plates (15, 15a) are respectively arranged in the tube cavities at the two ends of the opening (11) of the sleeve (10), the plate surfaces of the first and second partition plates (15, 15a) are perpendicular to the tube length of the sleeve (10), the first and second partition plates (15, 15a) are respectively arranged at the front ends of the surfaces to be swept of the first and second glass slides (40, 40a), and the middle parts of the first and second partition plates (15, 15a) are provided with openings for detecting light to pass through.

4. The in-situ flue gas detection device according to claim 3, wherein: a first air outlet (14a) communicated with the air blowing pipeline (12) is formed in the side wall of the inner layer (10a) of the sleeve (10) located between the first glass slide (40) and the first partition plate (15), a first air exhaust port (16a) penetrating through the inner layer (10a) and the outer layer (10b) is formed in the side wall of the sleeve (10), the first air exhaust port (16a) and the first air outlet (14a) are arranged vertically and correspondingly to form an air curtain for vertical blowing, and the air curtain divides a surface to be blown of the first glass slide (40) from smoke.

5. The in-situ flue gas detection device according to claim 3 or 4, wherein: the side wall of the inner layer (10a) of the sleeve (10) between the second glass slide (40a) and the second partition plate (15a) is provided with a second air outlet (14b) communicated with the air blowing pipeline (12), the side wall of the sleeve (10) is provided with a second air outlet (16b) penetrating through the inner layer (10a) and the outer layer (10b), the second air outlet (16b) and the second air outlet (14b) are arranged up and down correspondingly to form a vertical air curtain for blowing, and the air curtain divides the surface to be blown of the second glass slide (40a) from the smoke.

6. The in-situ flue gas detection device according to claim 3 or 4, wherein: the first air outlet (14a), the second air outlet (14b), the first air outlet (16a) and the second air outlet (16b) on the sleeve (10) are all strip-shaped holes, and each strip-shaped hole is formed along the circumferential direction of the sleeve (10).

7. The in-situ flue gas detection device according to claim 6, wherein: the outer portion of the two ends of the sleeve (10) is further sleeved with a mounting pipe (50), the pipe orifice of one end of the mounting pipe (50) is fixedly connected with the pipe body of the sleeve (10) or the end portion of the detection pipe through a flange, the other end of the mounting pipe (50) is located in the flue gas pipeline (A), and the pipe body of the mounting pipe (50) is in sealing fit with the hole wall of the mounting hole formed in the opposite side wall of the flue gas pipeline (A).