CN210945724U - Atmosphere detection device of circulating cooling system of continuous annealing furnace - Google Patents
Atmosphere detection device of circulating cooling system of continuous annealing furnace Download PDFInfo
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- CN210945724U CN210945724U CN201921745063.4U CN201921745063U CN210945724U CN 210945724 U CN210945724 U CN 210945724U CN 201921745063 U CN201921745063 U CN 201921745063U CN 210945724 U CN210945724 U CN 210945724U
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- 238000001816 cooling Methods 0.000 title claims abstract description 32
- 238000000137 annealing Methods 0.000 title claims abstract description 29
- 238000001514 detection method Methods 0.000 title claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 30
- 230000001105 regulatory effect Effects 0.000 claims abstract description 17
- 239000007789 gas Substances 0.000 claims description 36
- 238000005070 sampling Methods 0.000 claims description 22
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 17
- 239000001301 oxygen Substances 0.000 claims description 17
- 229910052760 oxygen Inorganic materials 0.000 claims description 17
- 229910000831 Steel Inorganic materials 0.000 abstract description 16
- 239000010959 steel Substances 0.000 abstract description 16
- 238000004519 manufacturing process Methods 0.000 abstract description 12
- 230000003647 oxidation Effects 0.000 abstract description 4
- 238000007254 oxidation reaction Methods 0.000 abstract description 4
- 230000007547 defect Effects 0.000 abstract description 3
- 230000008595 infiltration Effects 0.000 abstract description 2
- 238000001764 infiltration Methods 0.000 abstract description 2
- 230000001681 protective effect Effects 0.000 description 13
- 238000000034 method Methods 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 239000000344 soap Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The utility model relates to an atmosphere detection device of a circulating cooling system of a continuous annealing furnace, which belongs to the technical field of auxiliary equipment for continuous annealing production. The technical scheme is as follows: the cooling air box (2) is arranged inside a hearth (1) of the annealing furnace, the cooling air box (2) is connected with a circulating pipeline (4), a water/gas heat exchanger (5) and a circulating fan (6) are arranged on the circulating pipeline (4), the water/gas heat exchanger (5) is positioned at an air inlet of the circulating fan (6), and a pressure regulating valve (7) is connected with an atmosphere analysis cabinet (8). The utility model discloses an atmosphere analysis cabinet, the equipment problem of heat exchanger infiltration, leaking and leaking the air before can in time detecting circulating fan, the effectual belted steel oxidation defect of avoiding appearing has high accuracy, the high efficiency, and energy saving consumes, to the characteristics of production no influence, the production quality accident that effectual reduction equipment trouble caused.
Description
Technical Field
The utility model relates to an atmosphere detection device of a circulating cooling system of a continuous annealing furnace, which belongs to the technical field of auxiliary equipment for continuous annealing production.
Background
The circulating cooling system is a key process for cooling the strip steel of the vertical continuous annealing furnace, is mainly applied to an air injection cooling control mode, and mainly has the function of cooling the strip steel at high temperature to the temperature required by the process. The continuous annealing furnace is filled with a reducing atmosphere, typically 95% nitrogen and 5% hydrogen. The circulating cooling system extracts high-temperature gas in the hearth, the high-temperature gas is cooled by the water/gas exchange heat exchanger, then cold protective gas is blown into an air box in the furnace by the circulating fan, the cold protective gas is blown to the surface of the strip steel through an air box nozzle to be cooled, and the strip steel is cooled to the temperature required by the process. Because the water/gas heat exchanger usually adopts a tubular heat exchanger, circulating water circulating inside the heat exchanger can pump protective gas mixed with water vapor or outside air into the annealing furnace by a circulating fan when the water seepage and water leakage of the heat exchanger occur in the tubular heat exchanger, or the sealing of a circulating pipeline is poor, and sand holes and cracks exist in a pipeline welding seam or the shaft seal of the circulating fan is seriously worn and the like. The water vapor or the air is fully mixed with the protective gas in the circulating pipeline at the outlet side of the circulating fan and is directly sprayed to the surface of the strip steel through the cooling air box, so that the surface of the strip steel is oxidized, bluing and blacking, and the product oxidation waste judgment is caused. Under normal conditions, the pressure of a circulating pipeline in front of a circulating fan is usually-1 to-6 Kpa, the pipeline is in a negative pressure state, the pressure of the pipeline in back of the circulating fan is usually 1 to 15Kpa, the leakage condition cannot be detected through conventional soap water spraying, and a weld penetration test can only be performed on the position of a weld joint, so that the weld joint penetration test has great limitation. And the atmosphere analyzer of the hearth of the annealing furnace is arranged in the hearth, so that the atmosphere in the hearth is analyzed, and the atmosphere analysis of a circulating cooling system is not performed. When the protective gas mixed with water vapor or air is sprayed to the surface of the strip steel through the cooling air box, the protective gas directly reacts with the high-temperature strip steel, and the water vapor or air in the protective gas is consumed, so that the atmosphere abnormal condition cannot be detected by the furnace atmosphere analyzer, and further, a large quantity of products are oxidized, bluing and blacking, and serious production quality accidents are caused. Generally, similar problems are solved by stopping a production line, stopping a circulating fan, pressurizing a heat exchanger to detect whether water leaks or not, and spraying soap water to a circulating pipeline to detect whether water leaks or not. Because the annealing furnace is usually provided with a plurality of circulating cooling systems, the whole investigation process is long in time, a large amount of manpower and material resources are consumed, and the production is seriously influenced.
Disclosure of Invention
The utility model aims at providing a continuous annealing stove circulative cooling system atmosphere detection device, adopt atmosphere analysis cabinet, can automatic tracking pass through circulating fan back cover gas, the tracking detects vapor content (dew point) and air (oxygen) content that is arranged in the cold cover gas of jetting belted steel surface, thereby can in time detect the preceding heat exchanger infiltration of circulating fan, leak and the equipment problem of air leakage, the effectual belted steel oxidation defect that avoids appearing, high accuracy has, high efficiency, energy saving consumes, the characteristics of no influence to production, the production quality accident that effectual reduction equipment trouble caused, the above-mentioned problem that exists in the background art has been solved effectively.
The technical scheme of the utility model is that: an atmosphere detection device of a circulating cooling system of a continuous annealing furnace comprises a hearth of the annealing furnace, a cooling air box, a circulating pipeline, a water/gas heat exchanger, a circulating fan, a pressure regulating valve and an atmosphere analysis cabinet, wherein the cooling air box is arranged inside the hearth of the annealing furnace, the cooling air box is connected with the circulating pipeline, the water/gas heat exchanger and the circulating fan are arranged on the circulating pipeline, the water/gas heat exchanger is positioned at an air inlet of the circulating fan, and the pressure regulating valve is connected with the atmosphere analysis cabinet; the atmosphere analysis cabinet comprises an electromagnetic valve, an atmosphere sampling pipe, a filter, a sampling pump, a flowmeter, an oxygen analyzer and a dew point analyzer; the atmosphere sampling pipe is installed on circulating line, and the atmosphere sampling pipe is connected with air-vent valve and solenoid valve, and the sampling pump is connected with oxygen analysis appearance and dew point analysis appearance, and the flowmeter links to each other with the sampling pump.
The regulating pressure of the pressure regulating valve is regulated to 0.2Kpa from 0-20 Kpa, the range of the oxygen analyzer is 0-10000ppm, and the range of the dew point analyzer is-60-25 ℃.
The utility model has the advantages that: the atmosphere analysis cabinet is adopted, the protective gas can automatically track the protective gas passing through the circulating fan, and the water vapor content (dew point) and the air (oxygen) content in the cold protective gas sprayed to the surface of the strip steel can be tracked and detected, so that the equipment problems of water seepage, water leakage and air leakage of a heat exchanger in front of the circulating fan can be detected in time, the oxidation defect of the strip steel is effectively avoided, the atmosphere analysis cabinet has the characteristics of high accuracy, high efficiency, energy consumption saving, no influence on production, and production quality accidents caused by equipment faults are effectively reduced.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
in the figure: the device comprises an annealing furnace hearth 1, a cooling air box 2, strip steel 3, a circulating pipeline 4, a water/gas heat exchanger 5, a circulating fan 6, a pressure regulating valve 7, an atmosphere analysis cabinet 8, an electromagnetic valve 9, an atmosphere sampling pipe 10, a filter 11, a sampling pump 12, a flowmeter 13, an oxygen analyzer 14 and a dew point analyzer 15.
Detailed Description
The technical solution of the present invention will be further described in detail with reference to the accompanying drawings and embodiments.
An atmosphere detection device of a circulating cooling system of a continuous annealing furnace comprises a hearth 1 of the annealing furnace, a cooling air box 2, a circulating pipeline 4, a water/gas heat exchanger 5, a circulating fan 6, a pressure regulating valve 7 and an atmosphere analysis cabinet 8, wherein the cooling air box 2 is arranged inside the hearth 1 of the annealing furnace, the cooling air box 2 is connected with the circulating pipeline 4, the water/gas heat exchanger 5 and the circulating fan 6 are arranged on the circulating pipeline 4, the water/gas heat exchanger 5 is positioned at an air inlet of the circulating fan 6, and the pressure regulating valve 7 is connected with the atmosphere analysis cabinet 8; the atmosphere analysis cabinet 8 comprises an electromagnetic valve 9, an atmosphere sampling pipe 10, a filter 11, a sampling pump 12, a flowmeter 13, an oxygen analyzer 14 and a dew point analyzer 15; an atmosphere sampling pipe 10 is arranged on the circulating pipeline 4, the atmosphere sampling pipe 10 is connected with a pressure regulating valve 7 and an electromagnetic valve 9, a sampling pump 12 is connected with an oxygen analyzer 14 and a dew point analyzer 15, and a flow meter 13 is connected with the sampling pump 12.
The adjusting pressure of the pressure adjusting valve 7 is adjusted to 0.2Kpa from 0-20 Kpa, the range of the oxygen analyzer 14 is 0-10000ppm, and the range of the dew point analyzer 15 is-60-25 ℃.
The atmosphere analysis cabinet detects the oxygen content and the water vapor in the collected atmosphere in the annealing furnace, and the electromagnetic valve 9 works in a time-sharing mode and is used for switching different circulating cooling system atmosphere collection.
In practical application, during normal production, the circulating fan 6 extracts high-temperature gas from the hearth 1 of the annealing furnace through the circulating pipeline 4, the high-temperature gas is cooled and heat exchanged through the water/gas heat exchanger 5, and then the circulating fan 6 pressurizes cold protective gas to 1-15 Kpa and blows the cold protective gas into the cooling bellows 2 in the hearth 1 of the annealing furnace to cool the strip steel 3. The electromagnetic valve 9 is opened through an electrical control system, the sampling pump 12 is started, the pressure of the sample gas is reduced to 0.2Kpa through the pressure regulating valve 7 and then the sample gas enters the atmosphere analysis cabinet 8, the sample gas is filtered through the filter 11 and then enters the oxygen analyzer 13 and the dew point analyzer 14 through the sampling pump 12 and the flowmeter 13, the oxygen analyzer 13 and the dew point analyzer 14 analyze the oxygen content and the dew point in the sample gas, the analysis result is transmitted to the electrical control system, when the oxygen content or the dew point exceeds the standard, the acousto-optic alarm is carried out, the waste of protective gas in the annealing furnace is avoided, and the quality of strip steel products is ensured.
Claims (2)
1. The utility model provides an atmosphere detection device of continuous annealing stove circulative cooling system which characterized in that: the annealing furnace comprises an annealing furnace hearth (1), a cooling air box (2), a circulating pipeline (4), a water/gas heat exchanger (5), a circulating fan (6), a pressure regulating valve (7) and an atmosphere analysis cabinet (8), wherein the cooling air box (2) is arranged inside the annealing furnace hearth (1), the cooling air box (2) is connected with the circulating pipeline (4), the water/gas heat exchanger (5) and the circulating fan (6) are arranged on the circulating pipeline (4), the water/gas heat exchanger (5) is positioned at an air inlet of the circulating fan (6), and the pressure regulating valve (7) is connected with the atmosphere analysis cabinet (8); the atmosphere analysis cabinet (8) comprises an electromagnetic valve (9), an atmosphere sampling tube (10), a filter (11), a sampling pump (12), a flowmeter (13), an oxygen analyzer (14) and a dew point analyzer (15); the atmosphere sampling pipe (10) is installed on the circulating pipeline (4), the atmosphere sampling pipe (10) is connected with the pressure regulating valve (7) and the electromagnetic valve (9), the sampling pump (12) is connected with the oxygen analyzer (14) and the dew point analyzer (15), and the flow meter (13) is connected with the sampling pump (12).
2. The atmosphere detecting device of the circulating cooling system of the continuous annealing furnace according to claim 1, characterized in that: the regulating pressure of the pressure regulating valve (7) is regulated to 0.2Kpa from 0-20 Kpa, the range of the oxygen analyzer (14) is 0-10000ppm, and the range of the dew point analyzer (15) is-60-25 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921745063.4U CN210945724U (en) | 2019-10-17 | 2019-10-17 | Atmosphere detection device of circulating cooling system of continuous annealing furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921745063.4U CN210945724U (en) | 2019-10-17 | 2019-10-17 | Atmosphere detection device of circulating cooling system of continuous annealing furnace |
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| Publication Number | Publication Date |
|---|---|
| CN210945724U true CN210945724U (en) | 2020-07-07 |
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| CN201921745063.4U Expired - Fee Related CN210945724U (en) | 2019-10-17 | 2019-10-17 | Atmosphere detection device of circulating cooling system of continuous annealing furnace |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111896183A (en) * | 2020-08-24 | 2020-11-06 | 马鞍山钢铁股份有限公司 | Water leakage detection device and water leakage searching method for heat exchanger in annealing furnace |
| CN112180046A (en) * | 2020-09-30 | 2021-01-05 | 张家港扬子江冷轧板有限公司 | Galvanizing furnace nose atmosphere on-line measuring device |
| CN114317942A (en) * | 2020-09-28 | 2022-04-12 | 上海梅山钢铁股份有限公司 | Method for judging and processing water leakage in hot galvanizing horizontal furnace |
-
2019
- 2019-10-17 CN CN201921745063.4U patent/CN210945724U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111896183A (en) * | 2020-08-24 | 2020-11-06 | 马鞍山钢铁股份有限公司 | Water leakage detection device and water leakage searching method for heat exchanger in annealing furnace |
| CN114317942A (en) * | 2020-09-28 | 2022-04-12 | 上海梅山钢铁股份有限公司 | Method for judging and processing water leakage in hot galvanizing horizontal furnace |
| CN114317942B (en) * | 2020-09-28 | 2024-05-10 | 上海梅山钢铁股份有限公司 | Method for judging and treating water leakage in hot galvanizing horizontal furnace |
| CN112180046A (en) * | 2020-09-30 | 2021-01-05 | 张家港扬子江冷轧板有限公司 | Galvanizing furnace nose atmosphere on-line measuring device |
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