CN210923164U - Sampling pipeline of atmosphere analyzer in furnace - Google Patents
Sampling pipeline of atmosphere analyzer in furnace Download PDFInfo
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- CN210923164U CN210923164U CN201921431099.5U CN201921431099U CN210923164U CN 210923164 U CN210923164 U CN 210923164U CN 201921431099 U CN201921431099 U CN 201921431099U CN 210923164 U CN210923164 U CN 210923164U
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- sampling
- valve
- gas
- analysis
- circulating
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- 238000005070 sampling Methods 0.000 title claims abstract description 67
- 239000007789 gas Substances 0.000 claims abstract description 62
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 22
- 229910052757 nitrogen Inorganic materials 0.000 claims description 7
- 238000009792 diffusion process Methods 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 2
- 239000002912 waste gas Substances 0.000 claims 1
- 239000001301 oxygen Substances 0.000 abstract description 26
- 229910052760 oxygen Inorganic materials 0.000 abstract description 26
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 25
- 238000000137 annealing Methods 0.000 abstract description 13
- 229910001873 dinitrogen Inorganic materials 0.000 abstract description 8
- 238000012423 maintenance Methods 0.000 abstract description 5
- 230000000740 bleeding effect Effects 0.000 abstract description 3
- 230000008878 coupling Effects 0.000 abstract description 3
- 238000010168 coupling process Methods 0.000 abstract description 3
- 238000005859 coupling reaction Methods 0.000 abstract description 3
- 238000000605 extraction Methods 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 230000002829 reductive effect Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000005465 channeling Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003204 osmotic effect Effects 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
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- Sampling And Sample Adjustment (AREA)
Abstract
The utility model discloses an atmosphere analysis appearance sampling pipeline in stove, it includes circulating gas discharge, analysis gas discharge, three way solenoid valve, nitrogen gas valve, sampling pump, diffuses valve, sampling valve and circulating fan, three way solenoid valve's air inlet connects the interior gas sampling pipe of stove, and two gas outlets connect circulating gas discharge and analysis gas discharge respectively, analysis gas discharge passes through the nitrogen gas valve and is connected with the nitrogen gas union coupling, the air inlet of sampling pump connects analysis gas discharge, and the gas outlet connects the analysis appearance through the sampling valve and is connected with circulating gas discharge through diffusing the valve, circulating gas discharge passes through circulating fan and exhaust emission union coupling. The utility model discloses utilize the sampling valve to keep apart the sampling pipeline of analysis appearance and maintenance, the pipeline that utilizes parts such as bleeding valve, circulating fan to constitute carries out quick oxygen extraction to the sampling pipeline after the maintenance to avoided the air to the pollution of analysis appearance and the measuring error who causes from this, guaranteed the normal operating of annealing stove.
Description
Technical Field
The utility model relates to a gas sampling pipeline of atmosphere analysis system in annealing stove belongs to and measures technical field.
Background
The atmosphere in the annealing furnace is reductive protective gas consisting of nitrogen and hydrogen, and the function of the atmosphere is to prevent the surface of the strip steel from being oxidized at high temperature in the annealing process, remove residual oxides on the surface of the strip steel and ensure the quality of the annealing surface of the strip steel. The main harmful components in the annealing furnace are oxygen and water, and the oxygen content in the annealing furnace is controlled below 50ppm in order to ensure the reductive protective atmosphere in the annealing furnace.
Annealing furnaces are typically equipped with a furnace atmosphere analysis system that includes a hydrogen analyzer, a dew point analyzer, and an oxygen analyzer. The temperature set value of the heating furnace is limited according to the atmosphere condition in the furnace, when the oxygen content in a certain region exceeds 2500PPM, the set value is limited to be not more than 250 ℃, when the oxygen content is more than 250PPM or the hydrogen content is less than 1 percent or no effective value exists in an analysis sampling point, the temperature set value is limited to be not more than 600 ℃, therefore, the actual measured value of the oxygen content is a key factor for dynamically controlling the temperature of the heating furnace, and whether the measured value is normal or not has great influence on the temperature control of the annealing furnace.
When maintaining and repairing atmosphere analytic system in the stove, especially when parts such as change sampling pump, filter screen, often need take apart the sampling pipeline, oxygen that leads to in the air gets into analysis pipeline and analysis appearance sensor, oxygen analysis appearance utilizes the infiltration principle to detect micro-oxygen in the electrolyte, because current sampling pipeline does not have isolation oxygen and quick oxygen discharging function, need long time after the analysis pipeline is polluted by the air just can replace the oxygen in the electrolyte, cause the analysis appearance measured value serious high for a long time, and then lead to heating region temperature setting value to receive the restriction and even make the nozzle stop heating, annealing product quality has seriously been influenced. Therefore, how to remove the pollution of the analysis pipeline is always a problem to the related technicians.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an atmosphere analysis appearance sampling pipeline in stove to prior art's drawback to clear away the analysis pipeline fast and pollute, guarantee annealing stove normal operating.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides an atmosphere analysis appearance sampling pipeline in stove, includes circulating gas collecting pipe, analysis gas collecting pipe, three solenoid valve, nitrogen gas valve, sampling pump, diffuse valve, sampling valve and circulating fan in the constitution, three solenoid valve's air inlet connects interior gas sampling pipe of stove, and two gas outlets connect circulating gas collecting pipe and analysis gas collecting pipe respectively, analysis gas collecting pipe passes through the nitrogen gas valve and is connected with the nitrogen gas union coupling, the air inlet of sampling pump connects analysis gas collecting pipe, and the gas outlet connects the analysis appearance through the sampling valve and is connected with circulating gas collecting pipe through diffuse valve, circulating gas collecting pipe passes through circulating fan and is connected with exhaust emission pipe.
The sampling pipelines of the in-furnace atmosphere analyzer are provided with a plurality of three-way electromagnetic valves, and air inlets of the three-way electromagnetic valves are respectively connected with different in-furnace gas sampling pipes.
The sampling pipeline of the in-furnace atmosphere analyzer further comprises a flowmeter, and the flowmeter is installed at an air outlet of the sampling pump.
The sampling pipeline of the in-furnace atmosphere analyzer is characterized in that the sampling pump and the air inlet of the circulating fan are respectively provided with a filtering device.
The sampling pump is connected with the bypass throttle valve in parallel.
The utility model discloses utilize the sampling valve to keep apart the sampling pipeline of analysis appearance and maintenance, the pipeline that utilizes parts such as bleeding valve, circulating fan to constitute carries out quick oxygen extraction to the sampling pipeline after the maintenance to avoided the air to the pollution of analysis appearance and the measuring error who causes from this, guaranteed the normal operating of annealing stove.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a schematic structural diagram of the present invention.
The reference numbers in the figures are as follows: 1. three solenoid valve, 2, analysis gas collector, 3, sampling pump, 4, bypass throttle valve, 5, flowmeter, 6, diffusion valve, 7, nitrogen gas valve, 8, sampling valve, 9, oxygen analyzer, 10, dew point analyzer, 11, circulating fan, 12, circulation gas collector, A, exhaust gas discharge pipe, B, gas discharge port.
Detailed Description
The utility model provides an atmosphere analysis appearance sampling pipeline in stove when replacing parts such as sampling pump, sensor, can prevent that the oxygen in the air from getting into the analysis pipeline, alleviates the impact pollution to the oxygen sensor osmotic membrane, reduces the analysis appearance by the abnormal body to normally throw time.
Referring to fig. 1, the utility model discloses mainly include three solenoid valve 1, analysis gas collecting pipe 2, sampling pump 3, bypass choke valve 4, flowmeter 5, blow-off valve 6, nitrogen gas valve 7, sampling valve 8, circulating fan 11 and circulating gas collecting pipe 12.
The sample gas to be analyzed firstly enters the analysis gas collecting pipe 2, and then is pumped into an analyzer (namely a dew point analyzer 10 and an oxygen analyzer 9 in the figure) by the sampling pump 3, so that the smoothness of a sampling pipeline and the timely updating of the gas to be analyzed are ensured, and the gas is discharged through a gas discharge port B after the analysis is finished. Because the multizone needs the atmosphere to detect, consequently need set up a plurality of sampling pipes, every sampling pipe is connected with analysis gas collecting pipe 2 and cycle gas collecting pipe 12 through a three way solenoid valve 1, the three way solenoid valve 1 on corresponding regional sampling pipe is opened according to the chronogenesis to the analysis appearance, normally open route between this sampling pipe and the cycle gas collecting pipe 12 is closed after three way solenoid valve 1 gets electricity, open the normally closed route that accesss to analysis gas collecting pipe 2, control sampling analysis pipeline carries out the analysis with the leading-in analysis appearance of corresponding regional atmosphere composition, gas in all the other sampling pipes gets into exhaust emission pipe under circulating fan 11's effect.
When the components such as the electromagnetic valve, the sampling pump, the filter screen and the like need to be replaced, the analyzer stops working after being powered off, the sampling valve 8 is closed, the bleeding valve 6 is opened, the analyzer and the directly connected gas pipeline of the analyzer are kept in the original state, relevant fault elements are detached, after replacement or maintenance, the analyzer is fastened and connected again, the oxygen analyzer 9, the dew point analyzer 10 and the circulating fan 11 are started, the analyzer is automatically connected with the nitrogen pipeline through the nitrogen valve 7 to perform nitrogen purging, at the moment, except the pipeline connected with the circulating gas collecting pipe 12, other pipelines are positive pressure, the detached and newly installed pipelines and elements are subjected to leakage inspection by using soapy water, the sampling pump 3 is manually opened when necessary, and oxygen in a channeling system can be rapidly eliminated. When the leak detection work is finished, after the circulating gas is discharged for a period of time, the time sequence of the analysis instrument can be started to be automatically sampled, the sampled gas is collected to an analysis gas collecting pipe 2 through a three-way electromagnetic valve 1, filtered and then enters a circulating gas collecting pipe 12 through a sampling pump 3 and a bypass throttle valve 4, a flowmeter 5 and a diffusion valve 6, and then is discharged to the outside through a circulating fan 11, after several minutes, oxygen in a pipeline is completely discharged, when the sampled analysis gas is completely in the pipeline, a sampling valve 8 is opened, the diffusion valve 6 is closed, the sampled gas sequentially enters a dew point analyzer 10 and an oxygen analyzer 9 through the sampling valve 8, and the instrument is put into normal use.
The utility model can reduce the impact pollution of oxygen in the air to the oxygen sensor permeation diffusion film, and prevent the oxygen from entering the analysis pipeline to cause the abnormal high of the measured data of the oxygen content; the time required by the analyzer from the abnormal body to normal use is reduced, the running stability of the heating furnace is ensured, and the production efficiency of the heating furnace is improved. In addition, if the bleed valve 6 and the sample valve 8 are closed, positive pressure may be provided to the analysis line to facilitate the use of soap to determine the leak site.
Claims (5)
1. A sampling pipeline of an atmosphere analyzer in a furnace is characterized by comprising a circulating gas collecting pipe (12), an analyzing gas collecting pipe (2), a three-way electromagnetic valve (1), a nitrogen valve (7), a sampling pump (3), a diffusion valve (6), a sampling valve (8) and a circulating fan (11), the air inlet of the three-way electromagnetic valve (1) is connected with a furnace gas sampling pipe, two air outlets are respectively connected with a circulating gas collecting pipe (12) and an analysis gas collecting pipe (2), the analysis gas collecting pipe (2) is connected with a nitrogen pipe through a nitrogen valve (7), the gas inlet of the sampling pump (3) is connected with the analysis gas collecting pipe (2), the gas outlet is connected with the analyzer through the sampling valve (8) and is connected with the circulating gas collecting pipe (12) through the diffusion valve (6), the circulating gas collecting pipe (12) is connected with the waste gas discharge pipe through a circulating fan (11).
2. The sampling pipeline of the furnace atmosphere analyzer in claim 1, wherein the three-way electromagnetic valve (1) is provided in plurality, and the gas inlets of the three-way electromagnetic valve are respectively connected with different furnace gas sampling pipes.
3. A sampling line of a furnace atmosphere analyzer according to claim 1 or 2, further comprising a flow meter (5), wherein the flow meter (5) is installed at an outlet of the sampling pump (3).
4. A sampling pipe of a furnace atmosphere analyzer according to claim 3, characterized in that the air inlets of the sampling pump (3) and the circulating fan (11) are provided with filtering devices.
5. A sampling line for a furnace atmosphere analyzer according to claim 4, characterized in that the sampling pump (3) is connected in parallel with a bypass throttle valve (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921431099.5U CN210923164U (en) | 2019-08-30 | 2019-08-30 | Sampling pipeline of atmosphere analyzer in furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921431099.5U CN210923164U (en) | 2019-08-30 | 2019-08-30 | Sampling pipeline of atmosphere analyzer in furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210923164U true CN210923164U (en) | 2020-07-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921431099.5U Expired - Fee Related CN210923164U (en) | 2019-08-30 | 2019-08-30 | Sampling pipeline of atmosphere analyzer in furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210923164U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114414627A (en) * | 2022-03-28 | 2022-04-29 | 北京机电研究所有限公司 | Dew point inspection system for large heating furnace |
| CN117269429A (en) * | 2023-09-21 | 2023-12-22 | 中科卓异环境科技(东莞)有限公司 | Furnace atmosphere detection system and detection method |
-
2019
- 2019-08-30 CN CN201921431099.5U patent/CN210923164U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114414627A (en) * | 2022-03-28 | 2022-04-29 | 北京机电研究所有限公司 | Dew point inspection system for large heating furnace |
| CN117269429A (en) * | 2023-09-21 | 2023-12-22 | 中科卓异环境科技(东莞)有限公司 | Furnace atmosphere detection system and detection method |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200703 |
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| CF01 | Termination of patent right due to non-payment of annual fee |