CN101799352B - Online and rapid leakage detecting method for roller hearth type non-oxidation furnace radiating pipe - Google Patents
Online and rapid leakage detecting method for roller hearth type non-oxidation furnace radiating pipe Download PDFInfo
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- CN101799352B CN101799352B CN2010101172755A CN201010117275A CN101799352B CN 101799352 B CN101799352 B CN 101799352B CN 2010101172755 A CN2010101172755 A CN 2010101172755A CN 201010117275 A CN201010117275 A CN 201010117275A CN 101799352 B CN101799352 B CN 101799352B
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- flange
- sealing gasket
- burst disk
- pressure
- pipe
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- 230000003647 oxidation Effects 0.000 title claims abstract description 15
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000007789 sealing Methods 0.000 claims abstract description 42
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 36
- 239000007789 gas Substances 0.000 claims abstract description 22
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 18
- 238000002347 injection Methods 0.000 claims abstract description 17
- 239000007924 injection Substances 0.000 claims abstract description 17
- 238000001514 detection method Methods 0.000 claims abstract description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 16
- 238000002485 combustion reaction Methods 0.000 claims description 16
- 229910052742 iron Inorganic materials 0.000 claims description 8
- 239000010425 asbestos Substances 0.000 claims description 5
- 239000003034 coal gas Substances 0.000 claims description 5
- 229910052895 riebeckite Inorganic materials 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 239000002912 waste gas Substances 0.000 abstract 3
- 238000004880 explosion Methods 0.000 abstract 2
- 238000009434 installation Methods 0.000 description 8
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- UPLPHRJJTCUQAY-WIRWPRASSA-N 2,3-thioepoxy madol Chemical compound C([C@@H]1CC2)[C@@H]3S[C@@H]3C[C@]1(C)[C@@H]1[C@@H]2[C@@H]2CC[C@](C)(O)[C@@]2(C)CC1 UPLPHRJJTCUQAY-WIRWPRASSA-N 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 238000007689 inspection Methods 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Abstract
The invention relates to an online and rapid leakage detecting method for a roller hearth type non-oxidation furnace radiating pipe. A sealing gasket and an explosion preventing sheet are manufactured according to the size of a flange in the connecting position of a burning nozzle body and a waste gas pipe; a single burning nozzle is closed, a burning nozzle waste gas pipe is disassembled, the sealing gasket and the explosion preventing sheet are installed between a burning nozzle flange and a waste gas pipe flange, and a bolt is tightly screwed; a gas pipeline pressure detecting hole or a combustion-supporting air pipeline pressure detecting hole is opened, and a pressure gage is connected; a combustion-supporting air pipeline is disconnected from a black rubber pipe, nitrogen is injected into a combustion-supporting air pipe, and the pressure of the pipeline is maintained at 6+/-0.5KPa, the nitrogen injection stops, and the seal of an injecting opening is maintained; that whether a numerical value of the pressure gage is different from a pressure value shown when the nitrogen injection stops or not is observed after two or three minutes; and if the pressure is reduced, the radiating pipe is proved to have a leakage point. The invention can carry out effective, convenient and rapid leakage detection on the roller hearth type non-oxidation furnace radiating pipe and synchronously carry out leakage detection during normal production.
Description
Technical field
The present invention relates to the online rapid leakage detecting method of a kind of roller hearth type non-oxidation furnace radiating pipe, be used for specifically under the situation that does not influence production, radiant tube being detected the method that has or not gas leakage at the bottom of the roller during stove ordinary production.
Background technology
At present, roller hearth type non-oxidation furnace is intact with its sealing, do not produce iron scale or produce few iron scale in stove, thereby can obtain good surface quality under the prerequisite of the every performance that guarantees steel plate.This heat-treatment furnace is because of satisfying the favor that various heat treatment requirements on the steel market enjoy each steel mill.If furnace sealing is bad or radiant tube is burnt and causes the intact gas leak of combustion air or unburned to stove inside, then can in stove, produce oxidizing atmosphere, not only cause surface of steel plate to form iron scale, and cause the hearth roll dross easily, both influenced the serviceable life of hearth roll, can form impression in the steel plate following table simultaneously, have a strong impact on the surface quality of steel plate.Because (width is greater than 5m for the width of modern heat-treatment furnace and the expansion day by day of length, length is greatly to more than the 100m), the length and the quantity of radiant tube increase considerably, inspection of leaking in the radiant tube and prediction pre-control are to serviceable life of the parts such as direct motion, output, quality, radiant tube and hearth roll produced and energy-saving and cost-reducing very important influence arranged.But now still the neither one effective method can carry out online leak-testing at the radiant tube of One's name is legion, particularly in synchronous detection that ordinary production the is carried out difficult point in the difficult problem especially.
Summary of the invention
Technical matters to be solved by this invention is: at the shortcoming of above prior art existence, the online rapid leakage detecting method of a kind of roller hearth type non-oxidation furnace radiating pipe is proposed, can carry out effectively, leak hunting easily and efficiently roller hearth type non-oxidation furnace radiating pipe, can leaking hunting synchronously when ordinary production.
The technical scheme that the present invention overcomes the above problems is:
The online rapid leakage detecting method of roller hearth type non-oxidation furnace radiating pipe, carry out according to the following steps:
(1) according to the physical dimension of burner body and off-gas line junction flange port, makes the sealing gasket that matches with flange, and make burst disk with tinned sheet iron with asbestos pad;
(2) close single burner, comprise coal gas hand valve and combustion air hand valve, take the off-gas line of burner apart, pack into the sealing gasket made and burst disk between burner flange and the off-gas line flange and tight a bolt;
(3) line pressure that turns on the gas-fire detects hole or combustion air pipeline pressure detection hole, and connects tensimeter;
(4) the combustion air pipeline is disconnected from black sebific duct, and in the combustion-aid air pipe nitrogen injection and keep combustion air pipeline system pressure to maintain 6 ± 0.5Kpa, can not be excessive, prevent that pressure from crossing the havoc radiant tube, stop nitrogen injection, and keep the sealing of inlet;
(5) whether the force value of crossing when observing tensimeter numerical value and stopping nitrogen injection after three minutes changes, and illustrates that then radiant tube has leak source if pressure reduces.
The diameter of bore of sealing gasket equals the flange internal diameter, and the width of sealing gasket is no more than the flange port external diameter, and the width across corners of sealing gasket is no more than the bolt hole position.
Burst disk is the circular burst disk that is provided with an outshot, and the external diameter of burst disk is greater than the flange internal diameter, but is no more than the bolt hole position.
Advantage of the present invention is: the present invention can carry out effectively, leak hunting easily and efficiently roller hearth type non-oxidation furnace radiating pipe, and key is can leaking hunting synchronously when ordinary production.The present invention is simple to operate, thoroughly solved because the roller hearth type non-oxidation furnace body of heater is longer, if radiant tube One's name is legion blowing out inspection then can influence a series of problems such as production again, this method is effective, efficient, convenient, and greatly reduces people's labour intensity.
Description of drawings
Fig. 1 is a scheme of installation of the present invention.
Fig. 2 is the installation site figure of A part among Fig. 1.
Fig. 3 is the structural representation of sealing gasket.
Fig. 4 is the structural representation of burst disk.
Embodiment
Embodiment one
The installation of present embodiment as shown in Figure 1, the online rapid leakage detecting method of a kind of roller hearth type non-oxidation furnace radiating pipe, carry out according to the following steps:
(1) according to the physical dimension of burner body and off-gas line 1 junction flange port, makes the sealing gasket 7 that matches with flange, and make burst disk 8 with tinned sheet iron with asbestos pad; The structure of sealing gasket 7 as shown in Figure 3, the diameter of bore R1 of sealing gasket 7 equals the flange internal diameter, the width D 1 of sealing gasket 7 is no more than the flange port external diameter, the width across corners D2 of sealing gasket 7 is no more than the bolt hole position; The structure of burst disk 8 as shown in Figure 4, burst disk 8 is for being provided with the circular burst disk of an outshot 9, the external diameter R2 of burst disk 8 is greater than the flange internal diameter, but is no more than the bolt hole position;
(2) close single burner, comprise coal gas hand valve and combustion air hand valve, take the off-gas line 1 of burner apart, pack into the sealing gasket 7 made and burst disk 8 between the flange of burner flange and off-gas line 1 and tight a bolt; Pack sealing gasket 7 and burst disk 8 between burner flange 11 and the off-gas line flange 10 into as shown in Figure 2 in the installation site;
(3) open the gaspipe line pressure detection hole 4 that links to each other with gaspipe line 2, and on this hole, connect tensimeter;
(4) combustion-aid air pipe 3 road is disconnected from black sebific duct 6, and from 3 li nitrogen injections of combustion-aid air pipe and keep combustion air pipeline system pressure to maintain 5.5Kpa, can not be excessive, prevent that pressure from crossing the havoc radiant tube, stop nitrogen injection, and keep the sealing of inlet;
(5) whether the force value of crossing when observing tensimeter numerical value and stopping nitrogen injection after three minutes changes, and illustrates that then radiant tube has leak source if pressure reduces.
Embodiment two
The installation of present embodiment as shown in Figure 1, the online rapid leakage detecting method of a kind of roller hearth type non-oxidation furnace radiating pipe, carry out according to the following steps:
(1) according to the physical dimension of burner body and off-gas line 1 junction flange port, makes the sealing gasket 7 that matches with flange, and make burst disk 8 with tinned sheet iron with asbestos pad; The structure of sealing gasket 7 as shown in Figure 3, the diameter of bore R1 of sealing gasket 7 equals the flange internal diameter, the width D 1 of sealing gasket 7 is no more than the flange port external diameter, the width across corners D2 of sealing gasket 7 is no more than the bolt hole position; The structure of burst disk 8 as shown in Figure 4, burst disk 8 is for being provided with the circular burst disk of an outshot 9, the external diameter R2 of burst disk 8 is greater than the flange internal diameter, but is no more than the bolt hole position;
(2) close single burner, comprise coal gas hand valve and combustion air hand valve, take the off-gas line 1 of burner apart, pack into the sealing gasket 7 made and burst disk 8 between the flange of burner flange and off-gas line 1 and tight a bolt; Pack sealing gasket 7 and burst disk 8 between burner flange 11 and the off-gas line flange 10 into as shown in Figure 2 in the installation site;
(3) open the combustion air pipeline pressure detection hole 5 that links to each other with combustion-aid air pipe 3, and on this hole, connect tensimeter;
(4) combustion-aid air pipe 3 road is disconnected from black sebific duct 6, and from 3 li nitrogen injections of combustion-aid air pipe and keep combustion air pipeline system pressure to maintain 6Kpa, can not be excessive, prevent that pressure from crossing the havoc radiant tube, stop nitrogen injection, and keep the sealing of inlet;
Whether the force value when observing tensimeter numerical value and stopping nitrogen injection after (5) three minutes changes, and illustrates that then radiant tube has leak source if pressure reduces.
Embodiment three
The installation of present embodiment as shown in Figure 1, the online rapid leakage detecting method of a kind of roller hearth type non-oxidation furnace radiating pipe, carry out according to the following steps:
(1) according to the physical dimension of burner body and off-gas line 1 junction flange port, makes the sealing gasket 7 that matches with flange, and make burst disk 8 with tinned sheet iron with asbestos pad; The structure of sealing gasket 7 as shown in Figure 3, the diameter of bore R1 of sealing gasket 7 equals the flange internal diameter, the width D 1 of sealing gasket 7 is no more than the flange port external diameter, the width across corners D2 of sealing gasket 7 is no more than the bolt hole position; The structure of burst disk 8 as shown in Figure 4, burst disk 8 is for being provided with the circular burst disk of an outshot 9, the external diameter R2 of burst disk 8 is greater than the flange internal diameter, but is no more than the bolt hole position;
(2) close single burner, comprise coal gas hand valve and combustion air hand valve, take the off-gas line 1 of burner apart, pack into the sealing gasket 7 made and burst disk 8 between the flange of burner flange and off-gas line 1 and tight a bolt; Pack sealing gasket 7 and burst disk 8 between burner flange 11 and the off-gas line flange 10 into as shown in Figure 2 in the installation site;
(3) open the gaspipe line pressure detection hole 4 that links to each other with gaspipe line 2, and on this hole, connect tensimeter;
(4) combustion-aid air pipe 3 road is disconnected from black sebific duct 6, and from 3 li nitrogen injections of combustion-aid air pipe and keep combustion air pipeline system pressure to maintain 6.5Kpa, can not be excessive, prevent that pressure from crossing the havoc radiant tube, stop nitrogen injection, and keep the sealing of inlet;
(5) whether the force value of crossing when observing tensimeter numerical value and stopping nitrogen injection after three minutes changes, and illustrates that then radiant tube has leak source if pressure reduces.
The present invention can also have other embodiment, and the technical scheme that equal replacement of all employings or equivalent transformation form all drops within the scope of protection of present invention.
Claims (1)
1. the online rapid leakage detecting method of roller hearth type non-oxidation furnace radiating pipe is characterized in that: carry out according to the following steps:
(1) according to the physical dimension of burner body and off-gas line junction flange port, makes the sealing gasket that matches with flange, and make burst disk with tinned sheet iron with asbestos pad;
(2) close single burner, comprise coal gas hand valve and combustion air hand valve, take the off-gas line of burner apart, pack into the sealing gasket made and burst disk between burner flange and the off-gas line flange and tight a bolt, the one side contact burner flange of sealing gasket, the one side of another side contact burst disk, the another side contact off-gas line flange of burst disk;
(3) line pressure that turns on the gas-fire detects hole or combustion air pipeline pressure detection hole, and connects tensimeter;
(4) the combustion air pipeline is disconnected from black sebific duct, and in the combustion-aid air pipe nitrogen injection and keep combustion air pipeline system pressure to maintain 6 ± 0.5Kpa, stop nitrogen injection, and keep the sealing of inlet;
(5) whether the force value of crossing when observing tensimeter numerical value and stopping nitrogen injection after three minutes changes, and illustrates that then radiant tube has leak source if pressure reduces;
The diameter of bore of described sealing gasket equals the flange internal diameter, and the width of described sealing gasket is no more than the flange port external diameter, and the width across corners of described sealing gasket is no more than the bolt hole position;
Described burst disk is the circular burst disk that is provided with an outshot, and the external diameter of described burst disk is greater than the flange internal diameter, but is no more than the bolt hole position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101172755A CN101799352B (en) | 2010-03-04 | 2010-03-04 | Online and rapid leakage detecting method for roller hearth type non-oxidation furnace radiating pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101172755A CN101799352B (en) | 2010-03-04 | 2010-03-04 | Online and rapid leakage detecting method for roller hearth type non-oxidation furnace radiating pipe |
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| CN101799352A CN101799352A (en) | 2010-08-11 |
| CN101799352B true CN101799352B (en) | 2011-11-09 |
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| CN2010101172755A Expired - Fee Related CN101799352B (en) | 2010-03-04 | 2010-03-04 | Online and rapid leakage detecting method for roller hearth type non-oxidation furnace radiating pipe |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103206943A (en) * | 2012-01-17 | 2013-07-17 | 宝山钢铁股份有限公司 | Method and device for detecting radiant tube deformation outside furnace |
| CN102853976B (en) * | 2012-09-28 | 2014-12-10 | 武汉钢铁(集团)公司 | Online leakage detection method and device thereof for heat treatment furnace radiant tube |
| CN102879155A (en) * | 2012-09-28 | 2013-01-16 | 武汉钢铁(集团)公司 | Online leakage detection method and device for non-oxidation furnace radiant tube containing shielding hydrogen gas |
| CN103033321A (en) * | 2012-12-12 | 2013-04-10 | 天津渤海化工有限责任公司天津碱厂 | Leakage test method for valve on oxygen pipeline extending into nozzle before driving |
| CN103574292B (en) * | 2013-11-14 | 2015-12-30 | 武汉钢铁(集团)公司 | The online method for rapidly positioning of non-oxidation heat processing furnace radiation pipe leak source |
| CN107966230A (en) * | 2018-01-12 | 2018-04-27 | 德阳科润电站成套设备有限公司 | A kind of atmos-valve demolition set |
| CN110672789A (en) * | 2019-09-11 | 2020-01-10 | 唐山钢铁集团有限责任公司 | Online detection method for leakage of W-shaped radiant tube of annealing furnace |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2574545B1 (en) * | 1984-12-06 | 1987-02-13 | Electricite De France | METHOD FOR DETECTING LEAKS IN AN OPERATING HEAT EXCHANGER |
| NL8900318A (en) * | 1989-02-08 | 1990-09-03 | Hoogovens Groep Bv | METHOD FOR MEASURING A LEAK IN AN INTERMEDIATE WALL OF A REGENERATIVE HEAT GENERATOR. |
| FR2765684B1 (en) * | 1997-07-04 | 1999-08-20 | Lorraine Laminage | CHECKING THE SEALING OF RADIANT TUBES IN INDUSTRIAL OVENS |
| CN101144747B (en) * | 2007-11-08 | 2010-08-18 | 中冶成工上海五冶建设有限公司 | Coke dry quenching all-system dynamic air tight test method |
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