CN210090125U - Flue gas sampling auxiliary device suitable for high temperature positive pressure flue - Google Patents
Flue gas sampling auxiliary device suitable for high temperature positive pressure flue Download PDFInfo
- Publication number
- CN210090125U CN210090125U CN201920612125.8U CN201920612125U CN210090125U CN 210090125 U CN210090125 U CN 210090125U CN 201920612125 U CN201920612125 U CN 201920612125U CN 210090125 U CN210090125 U CN 210090125U
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- pipe
- sampling
- flue
- flue gas
- tube
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Links
- 238000005070 sampling Methods 0.000 title claims abstract description 99
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 68
- 239000003546 flue gas Substances 0.000 title claims abstract description 68
- 239000000779 smoke Substances 0.000 claims abstract description 26
- 238000007789 sealing Methods 0.000 claims abstract description 10
- 238000002347 injection Methods 0.000 claims description 28
- 239000007924 injection Substances 0.000 claims description 28
- 238000010926 purge Methods 0.000 claims description 18
- 239000007789 gas Substances 0.000 claims description 12
- 230000001105 regulatory effect Effects 0.000 claims description 11
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 230000006378 damage Effects 0.000 abstract description 3
- 239000002341 toxic gas Substances 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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Abstract
The utility model discloses a flue gas sample auxiliary device suitable for high temperature malleation flue. The existing flue gas sampling hole cannot be applied to a high-temperature positive-pressure flue gas sampling place. The sampling tube, the first connecting piece and the front external connecting tube of the utility model form a coaxial tube section which is vertical to the wall surface of the flue and is used as a flue gas sampling hole; the sampling pipe is used for sealing the smoke flowing in from one end of the sampling pipe to the smoke flowing in from the other end of the sampling pipe, and the air in the environment enters from the smoke sampling hole with the plug detached and turns to enter the mixing pipe after passing through the second ball valve; meanwhile, the flue gas enters the front external connecting pipe from the flue, turns and enters the mixing pipe after passing through the first connecting piece and the sampling pipe; air and flue gas are sucked into the ejector through the mixing pipe, then pass through the second connecting piece and the rear external connecting pipe together with compressed air, and finally are sprayed into the flue. The utility model can prevent high temperature smoke from leaking to cause high temperature burn or toxic gas damage; the on-line smoke sampling condition can be provided, and the machine does not need to be restarted or stopped.
Description
Technical Field
The utility model belongs to the technical field of the gas sampling, specifically speaking is an auxiliary device that takes a sample is carried out high temperature malleation flue gas.
Background
The flue gas generated by fuel combustion flows in the flue and the chimney, and the pressure of the flue gas in all or part of the pipe sections can be positive pressure. When sampling smoke in a positive pressure flue or chimney, the smoke is easy to leak, especially high-temperature smoke, has higher potential safety hazard, and is easy to cause safety production accidents such as personnel poisoning, skin burning, surrounding combustible ignition and the like. The flue gas sampling hole generally comprises an external pipe section and a plug (such as a threaded cover, a flange plate, a plug and the like), wherein the plug is opened when the flue gas sampling is finished, and the plug is installed again when the flue gas sampling is finished. However, in a high-temperature positive-pressure flue or a chimney, opening the flue gas sampling hole to block the high-temperature flue gas will cause the high-temperature flue gas to leak, which affects the safety of personnel and environment, and causes the flue gas sampling to be unable to be performed normally.
The existing solution is to shut down, open the shutoff, install the flue gas sampling device before carrying out the flue gas sample, wear protective mask and prevent scalding gloves, adopt gauze sealed thief hole and sampling device's gap when the flue gas sample, shut down, reinstallate the shutoff when accomplishing the flue gas sample, restart the machine after the experiment finishes. Therefore, the existing flue gas sampling hole cannot be suitable for a high-temperature positive-pressure flue gas sampling place, the danger is large in the online operation process, and the unit needs to be started and stopped in the offline operation process.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of overcoming the defects in the prior art and provide a flue gas sampling auxiliary device which is suitable for a high-temperature positive-pressure flue so as to prevent high-temperature flue gas from leaking to cause high-temperature burns or toxic gas injuries; so as to provide the condition of online smoke sampling without restarting and stopping the machine.
Therefore, the utility model adopts the following technical scheme: a flue gas sampling auxiliary device suitable for a high-temperature positive-pressure flue comprises a front external connecting pipe, a rear external connecting pipe, an ejector, a sampling pipe, a mixing pipe, a working gas source, an injection pipe, a purging pipe, an emergency gas source, a gas seal pipe, a first connecting piece and a second connecting piece;
the front external pipe and the rear external pipe are used for being arranged on the wall surface of the flue;
the sampling tube, the first connecting piece and the front external connecting tube form a coaxial tube section vertical to the wall surface of the flue and serve as a flue gas sampling hole;
the inlet end of the ejector is connected with the injection pipe, the outlet end of the ejector is connected with the rear external connecting pipe through a second connecting piece, and the throat part of the ejector is connected with the purging pipe;
the injection pipe is used for conveying compressed air from a working air source to the inlet end of the ejector;
the purging pipe is used for conveying compressed air from a working air source to the throat part of the ejector;
one end of the sampling tube is provided with a detachable plug, and the other end of the sampling tube is connected with the front external connecting tube through a first connecting piece; the sampling tube is provided with a second ball valve, and a mixing tube connecting hole and an air seal tube connecting hole are formed in the sampling tube; the gas seal pipe connecting hole is positioned between the mixing pipe connecting hole and the detachable plug, and the second ball valve is positioned between the gas seal pipe connecting hole and the detachable plug;
one end of the mixing tube is connected to the middle part of the sampling tube, the other end of the mixing tube is connected to the throat part of the ejector, and the middle part of the mixing tube is a flexible connecting piece, so that the mixing tube has certain flexibility in the length direction, the mounting position is convenient to adjust, and the mounting flexibility is improved;
the gas seal pipe is used for conveying compressed air from an emergency air source or a working air source to the sampling pipe;
the air flowing in from one end of the sampling tube seals the smoke flowing in from the other end of the sampling tube, and the air in the environment enters from the smoke sampling hole with the plug detached and turns to enter the mixing tube after passing through the second ball valve; meanwhile, the flue gas enters the front external connecting pipe from the flue, turns and enters the mixing pipe after passing through the first connecting piece and the sampling pipe; air and flue gas are sucked into the ejector through the mixing pipe, then pass through the second connecting piece and the rear external connecting pipe together with compressed air, and finally are sprayed into the flue.
The utility model discloses an ejector produces the low-pressure area at its laryngeal opening, low-pressure area and flue in malleation, all form the pressure differential with external environment pressure, utilize pressure differential drive flue gas and air flow in opposite directions from the sampling tube both ends respectively, the air of sampling tube one end forms sealedly to the flue gas of its other end to the flue gas when carrying out the flue gas sample is prevented from leaking.
Preferably, the front external pipe is positioned at the flue gas upstream in the flue, and a first ball valve is arranged on the front external pipe.
Preferably, the rear external pipe is positioned at the lower stream of the flue gas in the flue, and a first stop valve is arranged on the rear external pipe.
Preferably, the number of the flue gas sampling holes is one or more.
Preferably, the air seal pipe is provided with a normally open stop valve and a quick open electromagnetic valve.
Preferably, the quick-opening electromagnetic valve is quickly opened when preset logic is met, compressed air is sprayed into the sampling tube to form smoke sealing, and the sealing performance of air to smoke is guaranteed when the smoke pressure in the flue abnormally fluctuates.
Preferably, the injection pipe is provided with an injection regulating valve.
Preferably, the injection regulating valve is manually regulated or automatically regulated in opening degree according to a preset control logic, so that the sealing performance of air to smoke is ensured when the pressure in the flue normally fluctuates.
Preferably, the purging pipe is provided with a purging valve.
Preferably, the first connecting piece and the second connecting piece are independent parts, and the first connecting piece and the second connecting piece can be connected with a front external connecting pipe and a sampling pipe which have different pipe diameters or connected with a rear external connecting pipe and an ejector which have different pipe diameters by selecting a proper connecting piece, so that the smoke sampling auxiliary device has stronger adaptability; the first connecting piece is connected with the front external connecting pipe and the sampling pipe in a threaded manner, so that the sealing performance is good; the second connecting piece all adopts threaded connection with the connected mode of back external pipe and ejector, and the leakproofness is good.
Preferably, the flue means a channel through which flue gas flows, and includes a flue as generally referred to, and also includes a chimney.
Preferably, when the flue gas contains dust and the flue gas flows upwards, an ash collecting tank can be arranged on the sampling pipe below the mixing pipe, so that accumulated ash and ash can be collected conveniently.
More preferably, the preset control logic of the injection regulating valve has multiple possibilities, and can be designed according to practical application scenarios.
More preferably, the preset logic of the quick-opening electromagnetic valve has multiple possibilities, and can be designed according to practical application scenarios.
The utility model is suitable for a flue and chimney especially have following beneficial effect to the place of high temperature malleation:
1) the high-temperature smoke can be prevented from leaking to cause high-temperature burn or toxic gas damage;
2) the online smoke sampling condition can be provided, and the machine does not need to be restarted or stopped;
3) a plurality of sampling holes can be arranged at the same time, so that different test requirements are met;
4) the installation is nimble and the interface is strong in universality.
Drawings
FIG. 1 is a schematic structural view of the smoke sampling auxiliary device of the present invention in use;
FIG. 2 is a front view of the sampling tube of the present invention;
FIG. 3 is a top view of the sampling tube of the present invention;
FIGS. 4-5 are schematic cross-sectional views of the connection holes of the air lock pipes in FIGS. 2 and 3 (FIG. 5 is a cross-sectional view taken along line A-A of FIG. 4);
fig. 6 is a schematic cross-sectional view of the ejector of the present invention;
fig. 7 is a control graph of the injection modulating valve of the present invention;
fig. 8 is a control curve diagram of the quick-opening electromagnetic valve of the present invention.
In the figure, 1-a front external connecting pipe, 2-a first connecting piece, 3-a sampling pipe, 4-a mixing pipe, 5-an ejector, 6-a rear external connecting pipe, 7-an injection pipe, 8-an air seal pipe, 9-a working air source, 10-an emergency air source, 11-a first ball valve, 12-a first stop valve, 13-an injection regulating valve, 14-a purge valve, 15-a quick-opening electromagnetic valve, 16-a normally-open stop valve, 17-a first external thread, 18-a mixing pipe connecting hole, 19-an air seal pipe connecting hole, 20-a second connecting piece, 21-a second ball valve, 22-a detachable plug, 23-a purge pipe, 24-an air seal small hole, 25-an empty groove, 26-a second external thread, 27-a purge pipe connecting hole and 28-a third external thread, 29-connecting hole on mixing tube, 30-throat, 31-second stop valve.
Detailed Description
The specific examples described in the following embodiments of the present invention are merely illustrative of specific embodiments of the present invention and do not constitute limitations on the scope of the invention.
The invention is further described with reference to the drawings and the detailed description.
Fig. 1 is the structure schematic diagram of the utility model discloses when flue gas sampling auxiliary device uses, flue gas sampling auxiliary device include before external pipe 1, after external pipe 6, ejector 5, sampling tube 3, hybrid tube 4, work air supply 9, injection pipe 7, sweep pipe 23, emergent air supply 10, atmoseal pipe 8, first connecting piece 2 and second connecting piece 20. The front external pipe 1 and the rear external pipe 6 are both arranged on the wall surface of the flue; the front external pipe 1 is positioned at the upper stream of the flue gas, and the first ball valve 11 is arranged on the front external pipe 1. The rear external pipe 6 is positioned at the downstream of the flue gas, and a first stop valve 12 is arranged on the rear external pipe 6. The inlet end of the ejector 5 is connected with the injection pipe 7, the outlet end of the ejector is connected with the rear external connecting pipe 6 through the first connecting piece 2, and the throat part of the ejector is connected with the purging pipe 6. And the injection pipe 7 is used for conveying compressed air from the working air source 9 to the inlet end of the ejector 5, and the injection pipe 7 is provided with an injection adjusting valve 13 and a second stop valve 31. And the purging pipe 6 is used for conveying the compressed air from the working air source 9 to the throat part of the ejector 5, and the purging pipe 6 is provided with a purging valve 14. One end of the sampling tube 3 is provided with a detachable plug 22, and the other end is connected with the front external connecting tube 11 through the first connecting piece 2.
The sampling tube 3, the first connecting piece 2 and the front external connecting tube 1 form a coaxial tube section which is vertical to the wall surface of the flue and is used as a flue gas sampling hole. One end of the mixing tube 4 is connected with the middle part of the sampling tube 3, the other end of the mixing tube is connected with the throat 5 part of the ejector, and the middle section of the mixing tube is a flexible connecting piece. The gas seal pipe 8 is used for conveying compressed air from an emergency air source 10 or a working air source 9 to the sampling pipe 3, and the gas seal pipe 8 is provided with a normally open stop valve 16 and a quickly open electromagnetic valve 15.
Fig. 2 is a front view of the sampling tube, and fig. 3 is a top view of the sampling tube. The sampling tube 3 adopts first external screw thread 17 with the one end that first connecting piece 2 is connected, can dismantle shutoff 22 and adopt the flange, sets up mixing tube connecting hole 18 and atmoseal tube connecting hole 19 on the sampling tube, installs second ball valve 21 on the sampling tube, mixing tube connecting hole 18 be located sampling tube 3 middle part, atmoseal tube connecting hole 19 be located mixing tube connecting hole 18 and can dismantle between the shutoff 22, second ball valve 21 be at atmoseal tube connecting hole 19 and can dismantle between the shutoff 22.
Fig. 4-5 are partial sectional views of the connection holes of the air seal pipes in fig. 2 and 3, the outer surface of the sampling pipe 3 is provided with an air seal pipe connection hole 19, the inner surface of the sampling pipe 3 is provided with 8 air seal small holes 24 uniformly distributed along the circumference, and the air seal pipe connection hole 19 is communicated with all the air seal small holes 24 through universal empty grooves 25; compressed air enters from the connecting hole 19 of the air seal pipe, is distributed to 8 air seal small holes 24 through the empty groove 25, and then is sprayed into the inner cavity of the sampling pipe from the air seal small holes to seal smoke.
Fig. 6 is a sectional view of the ejector 5, wherein the second external thread 26 is adopted at the end of the ejector 5 connected with the second connecting piece 20, the third external thread 28 is adopted at the end connected with the injection pipe 7, and a purging pipe connecting hole 27 and a mixing pipe upper connecting hole 29 are arranged at a throat 30.
Fig. 7 shows a control diagram of the injection control valve 13, which can be determined experimentally and represents the opening of the injection control valve 13 at different flue gas pressures. The pressure measuring position of the smoke pressure is positioned in the flue and at the upstream of the front external connecting pipe 1, and the existing pressure measuring point on the flue can be adopted; and (3) adjusting the opening degree of the injection regulating valve 13 under different flue gas pressures until no flue gas leaks out of the sampling pipe 3, and recording the opening degree corresponding to the flue gas pressure.
Fig. 8 is a control graph of the quick-opening solenoid valve 15, which can be determined through experiments and shows that the quick-opening solenoid valve is quickly opened to inject the sealed compressed air to the sampling pipe 3 when the opening degree of the injection adjusting valve 13 is too large; the danger that the smoke leaks due to the fact that the smoke pressure suddenly fluctuates and the adjusting allowance of the injection adjusting valve 13 is insufficient is prevented. In this embodiment, the quick-opening electromagnetic valve 15 is set to: when the opening degree of the injection regulating valve 13 reaches 80%, the quick opening electromagnetic valve 15 is opened fully instantaneously.
The above description is only exemplary of the present invention, and is not intended to limit the scope of the present invention. Any person skilled in the art should also realize that such equivalent changes and modifications can be made without departing from the spirit and principles of the present invention.
Claims (10)
1. A flue gas sampling auxiliary device suitable for a high-temperature positive-pressure flue comprises a front external pipe (1), a rear external pipe (6), an ejector (5), a sampling pipe (3), a mixing pipe (4), a working gas source (9), an injection pipe (7), a purging pipe (23), an emergency gas source (10), a gas seal pipe (8), a first connecting piece (2) and a second connecting piece (20),
the front external pipe (1) and the rear external pipe (6) are arranged on the wall surface of the flue;
the sampling tube (3), the first connecting piece (2) and the front external connecting tube (1) form a coaxial tube section vertical to the wall surface of the flue and used as a flue gas sampling hole;
the inlet end of the ejector (5) is connected with the injection pipe (7), the outlet end of the ejector is connected with the rear external connecting pipe (6) through a second connecting piece (20), and the throat part of the ejector is connected with the purging pipe (23);
the injection pipe (7) is used for conveying compressed air from a working air source (9) to the inlet end of the ejector (5);
the purging pipe (23) is used for conveying compressed air from the working air source (9) to the throat part of the ejector (5);
one end of the sampling tube (3) is provided with a detachable plug (22), and the other end of the sampling tube is connected with the front external connecting tube (1) through a first connecting piece (2); a second ball valve (21) is arranged on the sampling tube (3), and a mixing tube connecting hole (18) and an air seal tube connecting hole (19) are formed in the sampling tube (3); the mixing tube connecting hole (18) is positioned in the middle of the sampling tube, the air sealing tube connecting hole (19) is positioned between the mixing tube connecting hole (18) and the detachable plug (22), and the second ball valve (21) is positioned between the air sealing tube connecting hole (19) and the detachable plug (22);
one end of the mixing pipe (4) is connected to the middle part of the sampling pipe (3), the other end of the mixing pipe is connected to the throat part of the ejector (5), and the middle part of the mixing pipe is a flexible connecting piece;
the air seal pipe (8) is used for conveying compressed air from an emergency air source (10) or a working air source (9) to the sampling pipe (3);
the air flowing in one end of the sampling pipe (3) seals the smoke flowing in the other end of the sampling pipe, and the air in the environment enters from the smoke sampling hole with the plug detached and turns to enter the mixing pipe (4) after passing through the second ball valve (21); meanwhile, the flue gas enters the front external connecting pipe (1) from the flue, turns and enters the mixing pipe (4) after passing through the first connecting piece (2) and the sampling pipe (3); air and smoke are sucked into the ejector (5) through the mixing pipe (4), then pass through the second connecting piece (20) and the rear external connecting pipe (6) together with compressed air, and finally are sprayed into the flue.
2. The flue gas sampling auxiliary device applicable to the high-temperature positive-pressure flue is characterized in that the front external connecting pipe (1) is positioned at the flue gas upstream in the flue, and a first ball valve (11) is arranged on the front external connecting pipe (1).
3. The flue gas sampling auxiliary device applicable to the high-temperature positive-pressure flue is characterized in that the rear external pipe (6) is positioned in the flue downstream of flue gas in the flue, and the rear external pipe (6) is provided with a first stop valve (12).
4. The flue gas sampling auxiliary device suitable for the high-temperature positive-pressure flue according to any one of claims 1 to 3, wherein the flue gas sampling hole is one or more.
5. The auxiliary device for sampling the flue gas applicable to the high-temperature positive-pressure flue according to any one of claims 1 to 3, wherein a normally open stop valve (16) and a quickly open electromagnetic valve (15) are arranged on the air sealing pipe (8).
6. The auxiliary device for sampling the flue gas suitable for the high-temperature positive-pressure flue according to claim 5, wherein the quick-opening electromagnetic valve is quickly opened when a preset logic is met, compressed air is sprayed into the sampling tube to form a flue gas seal, and the sealing performance of the air to the flue gas is ensured when the pressure of the flue gas in the flue abnormally fluctuates.
7. The auxiliary sampling device for flue gas in high-temperature positive-pressure flue according to any one of claims 1 to 3, wherein the injection pipe (7) is provided with an injection regulating valve (13).
8. The auxiliary device for sampling flue gas as claimed in claim 7, wherein the injection regulating valve is manually or automatically regulated in opening according to a preset control logic to ensure the sealing performance of air against flue gas when the pressure in the flue normally fluctuates.
9. The auxiliary sampling device for flue gas in high-temperature positive-pressure flue according to any one of claims 1 to 3, wherein the purging pipe (23) is provided with a purging valve (14).
10. The flue gas sampling auxiliary device suitable for the high-temperature positive-pressure flue according to any one of claims 1 to 3, wherein the first connecting piece (2) and the second connecting piece (20) are independent parts, and the first connecting piece (2) is connected with the front external connecting pipe (1) and the sampling pipe (3) in a threaded manner; the second connecting piece (20) is in threaded connection with the rear external connecting pipe (6) and the ejector (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920612125.8U CN210090125U (en) | 2019-04-29 | 2019-04-29 | Flue gas sampling auxiliary device suitable for high temperature positive pressure flue |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920612125.8U CN210090125U (en) | 2019-04-29 | 2019-04-29 | Flue gas sampling auxiliary device suitable for high temperature positive pressure flue |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210090125U true CN210090125U (en) | 2020-02-18 |
Family
ID=69476696
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920612125.8U Withdrawn - After Issue CN210090125U (en) | 2019-04-29 | 2019-04-29 | Flue gas sampling auxiliary device suitable for high temperature positive pressure flue |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210090125U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110132663A (en) * | 2019-04-29 | 2019-08-16 | 国网浙江省电力有限公司电力科学研究院 | A kind of smoke sampling auxiliary device suitable for high temperature positive flue |
-
2019
- 2019-04-29 CN CN201920612125.8U patent/CN210090125U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110132663A (en) * | 2019-04-29 | 2019-08-16 | 国网浙江省电力有限公司电力科学研究院 | A kind of smoke sampling auxiliary device suitable for high temperature positive flue |
| CN110132663B (en) * | 2019-04-29 | 2024-02-09 | 国网浙江省电力有限公司电力科学研究院 | Flue gas sampling auxiliary device suitable for high Wen Zhengya flue |
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20200218 Effective date of abandoning: 20240209 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20200218 Effective date of abandoning: 20240209 |