CN1566369A - Cooling process for hot-blast stove - Google Patents
Cooling process for hot-blast stove Download PDFInfo
- Publication number
- CN1566369A CN1566369A CN 03135155 CN03135155A CN1566369A CN 1566369 A CN1566369 A CN 1566369A CN 03135155 CN03135155 CN 03135155 CN 03135155 A CN03135155 A CN 03135155A CN 1566369 A CN1566369 A CN 1566369A
- Authority
- CN
- China
- Prior art keywords
- hotblast stove
- air duct
- furnace
- manhole
- stove
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001816 cooling Methods 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000007664 blowing Methods 0.000 claims description 12
- 238000002485 combustion reaction Methods 0.000 claims description 11
- 238000007789 sealing Methods 0.000 claims description 9
- 239000003517 fume Substances 0.000 claims description 8
- 238000010276 construction Methods 0.000 abstract description 14
- 239000011449 brick Substances 0.000 abstract description 8
- 230000007613 environmental effect Effects 0.000 abstract 1
- 238000007710 freezing Methods 0.000 description 6
- 230000008014 freezing Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 4
- 239000000779 smoke Substances 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000005272 metallurgy Methods 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Air Supply (AREA)
Abstract
The invention discloses a furnace kiln overhauling process, in particular to a furnace cooling process suitable for overhauling a blast furnace hot blast stove in the metallurgical industry. The cooling process of the hot blast stove adopts the technical scheme that: and after the furnace is shut down, the manhole at the upper part and the manhole at the lower part are opened, the cold air pipeline, the flue pipe and the hot air pipeline are sealed, and then the exhaust fan is used for exhausting air at the bottom of the hot air furnace. By adopting the technical process, cold air is forced to be sucked from the manhole of the furnace top and discharged through the lower exhaust fan, the airflow direction in the furnace is changed, the cooling speed in the furnace is improved, in the construction and dismantling process, the cold air enters the checker bricks from the feet of constructors, and the hot air is discharged from the manhole of the lower part, so that the environmental temperature of a construction area is improved, and the dismantling and construction progress is improved.
Description
Affiliated technical field
The present invention relates to stove maintenance technology, particularly be suitable for the descent of temperature technology in blast funnace hot blast stove when maintenance of metallurgy industry.
Background technology
In metallurgy industry, in order to guarantee the stable high yield of blast furnace, guarantee the stable air-supply of hotblast stove, must regularly carry out shutdown maintenance to hotblast stove.In the past need be after blowing out cool stove 15 days, make when temperature is from work in the stove 1300 ℃ drop to 50 ℃ and just can overhaul construction.
At present, in order to shorten the repair time, accelerate speed of furnace cooling, employing is suitably sprinkled water in stove and the drum combustion air is forced to cool off.Adopting above-mentioned strong cooling method after 5 days after the blowing out, the checker brick temperature also remains on 200～300 ℃ in the stove, gas flow temperature is 70～170 ℃, and this moment, the workmen carried out the inside dismounting, must stop to force cooling with the drum combustion air, can only adopt the vacuum fan exhausting, but effect is undesirable, and the construction environment very severe is so must carry out operation by turns, the dismounting cycle in early stage is long, generally needs 19～21 days.Its reason is: owing to all use many hotblast stove air feed simultaneously in smelter, cold wind (200 ℃) in order to prevent other hotblast stoves during maintenance, flue gas and hot blast are scurried in the stove and are hurted sb.'s feelings, need be with cold-air duct, flue tube, disconnections such as smoke valve bottom and hot blast short pipe, when the blower fan exhausting is used in the bottom of hotblast stove, from the cold-air duct gap, form between position such as Flue valve bottom and the blower fan " short circuit ", a large amount of freezing airs is directly discharged by blower fan from above-mentioned position, and there is a spot of freezing air to discharge from furnace roof through checker brick, so stove internal upper part air-flow is not had too big cooling effect, and effect is undesirable.
Goal of the invention
At existing temperature reduction technology weak effect, the long shortcoming of temperature fall time, the invention provides a kind of hotblast stove cooling equipment process that freezing air is discharged by furnace bottom bottom blower fan by back in the stove from furnace roof.
The technical scheme that hotblast stove cooling equipment process of the present invention adopts is: after blowing out top manhole and bottom manhole are opened, with cold air duct, flue tube, hot air duct sealing, carried out exhausting in the bottom of hotblast stove with vacuum fan again.
Adopt technical matters of the present invention, forcing freezing air to suck from the furnace roof manhole discharges through the downdraft machine, changed the gas stream in the stove direction, improved the cooling rate in the stove, in the construction demolishing process, freezing air enters checker brick from workmen's underfooting, and warm air is discharged from the bottom manhole, improved the construction area envrionment temperature, improved and remove and construction speed.
Description of drawings
Fig. 1 is the structure and the fundamental diagram of hotblast stove;
Fig. 2 is the A-A diagrammatic cross-section among Fig. 1;
Fig. 3 be among Fig. 2 the B-B sectional view '
Fig. 4 is a cold air duct sealing synoptic diagram;
Fig. 5 is a hot air duct sealing synoptic diagram;
Fig. 6 is a fume pipe sealing synoptic diagram.
Sequence number explanation in the accompanying drawing: 1-top manhole, 2-bottom manhole, 3-cold air duct, 4-hot air duct, 5-regenerator, 6-combustion chamber, 7-chimney, 8-burner, 9-fume pipe, 10-flue, 11-smoke valve, 12-blind plate, 13-cold blast valve, 14-hot blast valve, 15-hot blast short pipe.
Embodiment
The structure of hotblast stove and fundamental diagram are as shown in Figure 1,6 tops enter regenerator 5 to the waste gas that burner combustion produces through the combustion chamber from burner 8, discharge from chimney 7 by fume pipe 9 and flue 10 again, waste gas is with the heating of the checker brick in the regenerator 5, and hot blast valve 14 on the hot air duct 4 and the cold blast valve 13 on the cold air duct 3 are closed at this moment.After temperature in the regenerator 5 is raised to certain altitude, burner 8 cease combustions, cold blast valve 13 on the unlatching cold air duct 3 and the hot blast valve 14 on the hot air duct 4, after cold wind enters from cold air duct 3, after checker brick in regenerator 5 carry out heat exchange and are heated, send in the blast furnace by combustion chamber 6 and hot air duct 4.So when needs overhaul, because checker brick etc. are also accumulated a large amount of heats are arranged in the stove, make to keep very high temperature in the stove, bring influence to service work.
Hotblast stove cooling equipment process of the present invention is earlier cold air duct, flue tube, hot air duct to be sealed when blowing out, then top manhole and bottom manhole is opened, and carries out exhausting in the bottom of hotblast stove with vacuum fan again.
In order to guarantee the quick decline of temperature in the blowing out stove in early stage, adopt the drum combustion air to force the stove internal cooling in the 3-7 after blowing out days, can effectively reduce temperature in the stove.
Embodiment 1: during the hotblast stove blowing out, with the cold blast valve on the cold air duct 3 13, smoke valve 11 on the fume pipe 9 and the hot blast valve 14 on the hot air duct 4 are closed sealing, and suitably watering and drum combustion air forced cooling method forced cooling after 5 days in the employing stove, top manhole 1 and bottom manhole 2 are opened, vacuum fan is installed at hotblast stove bottom manhole 2 places is again carried out exhausting, force freezing air to suck from furnace roof top manhole 1, after the checker brick heat exchange in stove, forming warm air gets rid of from bottom manhole 2, thereby improved construction environment, can carry out the construction of removing in the stove.
Embodiment 2: in the production in ironworks, generally all be to adopt many hotblast stoves to provide hot blast to blast furnace, after the hotblast stove blowing out that will need to overhaul, in order to prevent damage and inefficacy owing to each valve, in construction process, hurt sb.'s feelings for preventing that hot blast, flue gas and cold wind from scurrying in the stove, earlier fume pipe 9, hot air duct 4 and cold air duct 3 are disconnected, the gap of hot air duct 4 is arranged on the hot blast short pipe 15.And blind plate 12 being set respectively at cold air duct 3, fume pipe 9 gaps and hot blast short pipe 15 gaps, the steel plate of using 1mm again is with the gap sealing between blind plate 12 and the above-mentioned pipeline.The cool stove of forced cooling is after 5 days, though temperature is 97 ℃ in the stove, open top manhole 1 and bottom manhole 2 again, adopt vacuum fan to carry out exhausting at hotblast stove bottom manhole 2 places, but after adopting this temperature reduction technology, improved envrionment temperature immediately, accelerated construction speed, only tearing the stove time open is 6 days, has shortened 13 days.Be discharging and the discharge port that need offer is provided with along with the variation of removing the position when removing, offer again when tearing open to this position.
Owing to all be the dismounting of adopting from top to bottom,, can guarantee effectively that the temperature on top is lower in the construction so adopt the method for downdraft in construction process.And the mode that adopts the bottom to blow, then cooling-down effect is not ideal, but belongs to protection scope of the present invention.
Claims (8)
1,, the hotblast stove cooling equipment process with cold air duct (3), flue tube (9), hot air duct (4) sealing, is characterized in that: top manhole (1) and bottom manhole (2) are opened, carried out exhausting in the bottom of hotblast stove with vacuum fan again when blowing out.
2, hotblast stove cooling equipment process as claimed in claim 1 is characterized in that: adopt the drum combustion air to force stove internal cooling 3-7 days after blowing out, carry out exhausting in the bottom of hotblast stove with vacuum fan again.
3, hotblast stove cooling equipment process as claimed in claim 2 is characterized in that: adopt the drum combustion air to force stove internal cooling 5 days after blowing out, carry out exhausting in the bottom of hotblast stove with vacuum fan again.
4, hotblast stove cooling equipment process as claimed in claim 1, it is characterized in that: after blowing out, earlier fume pipe (9), hot air duct (4) and cold air duct (3) are disconnected, and adopt vacuum fan to carry out exhausting in the bottom of hotblast stove in above-mentioned gap sealing back.
5, hotblast stove cooling equipment process as claimed in claim 4 is characterized in that: be provided with at fume pipe (9), hot air duct (4) and cold air duct (3) gap respectively and adopt blind plate (12), again with the gap sealing between blind plate (12) and the above-mentioned pipeline.
6, as claim 4 or 5 described hotblast stove cooling equipment processes, it is characterized in that: the gap of hot air duct (4) is arranged on the hot blast short pipe (15).
7, hotblast stove cooling equipment process as claimed in claim 1 is characterized in that: vacuum fan is installed in bottom manhole (2) and locates to carry out exhausting.
8, hotblast stove cooling equipment process as claimed in claim 1 is characterized in that: discharge port is along with the variation of removing the position is provided with.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03135155 CN1566369A (en) | 2003-06-09 | 2003-06-09 | Cooling process for hot-blast stove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03135155 CN1566369A (en) | 2003-06-09 | 2003-06-09 | Cooling process for hot-blast stove |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1566369A true CN1566369A (en) | 2005-01-19 |
Family
ID=34470202
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03135155 Pending CN1566369A (en) | 2003-06-09 | 2003-06-09 | Cooling process for hot-blast stove |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1566369A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101128606B (en) * | 2005-02-01 | 2012-06-20 | 丹尼利克里斯有限公司 | Support assembly for supporting heat regeneration checker work in a hot blast stove, hot blast stove provided with said support assembly, method of producing hot air using said hot blast stove |
| CN105238901A (en) * | 2015-09-30 | 2016-01-13 | 北京首钢国际工程技术有限公司 | Multipurpose hot blast stove high-temperature preheating system |
| CN111664713A (en) * | 2020-07-28 | 2020-09-15 | 广东韶钢松山股份有限公司 | Off-line cooling method of hot blast stove |
| CN111850211A (en) * | 2020-07-29 | 2020-10-30 | 广东韶钢松山股份有限公司 | Off-line drying method of hot blast stove |
| CN113124255A (en) * | 2021-04-16 | 2021-07-16 | 广东韶钢松山股份有限公司 | Hot air piping system maintenance cooling method |
| CN114480769A (en) * | 2022-01-28 | 2022-05-13 | 新疆八一钢铁股份有限公司 | Method for treating harmful gas in Ou metallurgical furnace body |
-
2003
- 2003-06-09 CN CN 03135155 patent/CN1566369A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101128606B (en) * | 2005-02-01 | 2012-06-20 | 丹尼利克里斯有限公司 | Support assembly for supporting heat regeneration checker work in a hot blast stove, hot blast stove provided with said support assembly, method of producing hot air using said hot blast stove |
| CN105238901A (en) * | 2015-09-30 | 2016-01-13 | 北京首钢国际工程技术有限公司 | Multipurpose hot blast stove high-temperature preheating system |
| CN111664713A (en) * | 2020-07-28 | 2020-09-15 | 广东韶钢松山股份有限公司 | Off-line cooling method of hot blast stove |
| CN111850211A (en) * | 2020-07-29 | 2020-10-30 | 广东韶钢松山股份有限公司 | Off-line drying method of hot blast stove |
| CN113124255A (en) * | 2021-04-16 | 2021-07-16 | 广东韶钢松山股份有限公司 | Hot air piping system maintenance cooling method |
| CN113124255B (en) * | 2021-04-16 | 2022-04-12 | 广东韶钢松山股份有限公司 | Hot air piping system maintenance cooling method |
| CN114480769A (en) * | 2022-01-28 | 2022-05-13 | 新疆八一钢铁股份有限公司 | Method for treating harmful gas in Ou metallurgical furnace body |
| CN114480769B (en) * | 2022-01-28 | 2023-02-10 | 新疆八一钢铁股份有限公司 | Method for treating harmful gas in Ou metallurgical furnace body |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |