CN204058506U - A kind of blast furnace ironmaking hotblast stove device - Google Patents
A kind of blast furnace ironmaking hotblast stove device Download PDFInfo
- Publication number
- CN204058506U CN204058506U CN201420502198.9U CN201420502198U CN204058506U CN 204058506 U CN204058506 U CN 204058506U CN 201420502198 U CN201420502198 U CN 201420502198U CN 204058506 U CN204058506 U CN 204058506U
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- CN
- China
- Prior art keywords
- pipeline
- gas
- blast furnace
- hotblast stove
- stove
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- Expired - Fee Related
Links
- 239000007789 gas Substances 0.000 claims abstract description 115
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 46
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 23
- 210000000481 breast Anatomy 0.000 claims abstract description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 13
- 239000001301 oxygen Substances 0.000 claims description 13
- 229910052760 oxygen Inorganic materials 0.000 claims description 13
- 238000005259 measurement Methods 0.000 claims description 3
- 239000000567 combustion gas Substances 0.000 abstract description 19
- 238000002485 combustion reaction Methods 0.000 abstract description 9
- 238000010926 purge Methods 0.000 abstract description 3
- 239000000571 coke Substances 0.000 description 9
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 239000011449 brick Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000003034 coal gas Substances 0.000 description 3
- 235000009508 confectionery Nutrition 0.000 description 3
- 239000003345 natural gas Substances 0.000 description 3
- 239000002912 waste gas Substances 0.000 description 3
- 238000005422 blasting Methods 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 208000011580 syndromic disease Diseases 0.000 description 1
Landscapes
- Regulation And Control Of Combustion (AREA)
Abstract
The utility model discloses a kind of blast furnace ironmaking hotblast stove device, described device comprises hotblast stove, blast furnace gas pipeline, high heat value gas introducing pipeline, nitrogen pipeline and chimney breast, described blast furnace gas pipeline is connected with hotblast stove, described high heat value gas is introduced pipeline and is connected with blast furnace gas pipeline, and the blast furnace gas pipeline that described nitrogen pipeline is introduced between pipeline and hotblast stove with high heat value gas is connected.The utility model does not need to change former hotblast stove combustion gas and combustion air transfer line, utilizes coke-oven gas pipeline in hot blast stove design structure and is used for the nitrogen pipeline that purges, just can realize utilizing higher calorific value combustion gas burning stove.
Description
Technical field
The utility model relates to technical field of blast furnace ironmaking supply air system, and being specifically related to a kind ofly provides the hot blast stove burning technology of high wind-warm syndrome for blast furnace.
Background technology
The effect of blast furnace ironmaking hotblast stove is the temperature that cold air heating is needed to blast furnace, in order to improve the returns and efficiency of blast furnace.Its principle of work is burn gas fuel in combustion chamber, produces the checker brick in high-temp waste gas heat hot wind furnace, and makes it accumulation of heat; After checker brick fully heat and reach certain temperature, pass into cold wind, high temperature checker brick by cold air heating to wind pushing temperature for blast furnace provides hot blast, meet blast fumance needs.
Existing hot blast stove burning is all fuel with blast furnace gas, when blast furnace coal tolerance do not reach burn stove need time, with addition of a small amount of coke-oven gas (<6%), when blast furnace gas supply break down can not provide combustion gas for hot blast stove burning time, need all to substitute blast furnace gas with combustion gas such as coke-oven gas, Sweet natural gas, coal gas of converter.The most frequently used combustion gas in current this area is coke-oven gas.
Coke-oven gas pipeline is had in hot blast stove design, burn stove with combustion gas such as coke-oven gas and there is following two problems compared with blast furnace gas: one is that calorific value is high, burn the bad control of stove process, dome temperature lift velocity soon and reach warning temperature (different refractory brick warning temperature different) very soon, the too high arch crown refractory brick that causes burns out, and burns the vault that collapses; Two is that the combustion-supporting air quantity that perfect combustion needs is large, and the design discharge of comburent air duct and adopt blast furnace gas to burn stove and match, higher calorific value combustion gas burning stove needs can not be met, if can not perfect combustion, high-temperature fuel gas will enter in flue, thus accident of easily blasting.
Utility model content
The utility model provides a kind of top combustion stove to utilize higher calorific value combustion gas (coke-oven gas, Sweet natural gas, coal gas of converter etc.) to burn the blast furnace ironmaking hotblast stove of stove, and the utility model utilizes coke-oven gas pipeline in hot blast stove design structure and the nitrogen pipeline that is used for purging to achieve to utilize higher calorific value combustion gas to burn stove.
For achieving the above object, the utility model provides following technical scheme: higher calorific value combustion gas carried by coke oven gas pipe, before entering hotblast stove, be blended into rare gas element by nitrogen pipeline, reduces higher calorific value gas concentration with rare gas element.Be blended into rare gas element and should ensure that burning stove process carries out smoothly, hotblast stove dome temperature and flue temperature can reach air-supply requirement; And ensureing that oxygen has certain excess quantity, in waste gas, oxygen level should at 0.5%-2.0%.
Device of the present utility model comprises hotblast stove, blast furnace gas pipeline, high heat value gas introducing pipeline, nitrogen pipeline and chimney breast, described blast furnace gas pipeline is connected with hotblast stove, described high heat value gas is introduced pipeline and is connected with blast furnace gas pipeline, and the blast furnace gas pipeline that described nitrogen pipeline is introduced between pipeline and hotblast stove with high heat value gas is connected.
Preferably, described chimney breast is provided with measurement of oxygen content device, for detecting the oxygen level in stack gases.
Preferably, described device also comprises the comburent air duct be connected with hotblast stove, and this pipeline arranges pressure lock.
Preferably, described blast furnace gas pipeline is connected with blast furnace gas main pipe, and blast furnace gas main pipe and high heat value gas are introduced on the blast furnace gas pipeline between pipeline and arranged blank-plate valve.
Preferably, described high heat value gas introduction pipeline is provided with several rapid switching valves and gas regulating valve.
Preferably, described nitrogen pipeline is provided with valve.
This device can realize blast furnace gas and burn stove: blast furnace gas enters blast furnace gas pipeline by the blank-plate valve on blast furnace gas main pipe, enter hotblast stove through valves such as gas regulator, gas valve, gas valves (combustion valve), aforesaid valve can be arranged as required and flexibly.
The method that stove is burnt in the use higher calorific value combustion gas that the utility model provides comprises:
1) stop blasting blast furnace gas in blast furnace gas pipeline;
2) high heat value gas is introduced in higher calorific value combustion gas and introduce pipeline;
3) in blast furnace gas pipeline, blast nitrogen, when burning stove, blast air;
4) regulate the coke gas flow and the nitrogen flow that enter blast furnace gas pipeline, the oxygen level in stack gases and dome temperature are kept within the specific limits.
Preferably, described dome temperature scope is 1350-1400 DEG C, and the oxygen level in stack gases controls at 0.5%-2%, guarantees coke-oven gas perfect combustion.
Preferably, described higher calorific value combustion gas comprises at least one in coke-oven gas, Sweet natural gas and coal gas of converter.
The utility model does not need to change former hotblast stove combustion gas and combustion air transfer line, utilizes coke-oven gas pipeline in hot blast stove design structure and is used for the nitrogen pipeline that purges, just can realize utilizing higher calorific value combustion gas burning stove.
Accompanying drawing explanation
The method schematic diagram of Fig. 1, use higher calorific value combustion gas burning stove.
Embodiment
The utility model is combustion gas with coke-oven gas, passes into nitrogen and reduces coke-oven gas concentration.
For achieving the above object, the utility model provides following technical scheme: higher calorific value combustion gas carried by coke oven gas pipe, before entering hotblast stove, be blended into rare gas element by nitrogen pipeline, reduces higher calorific value gas concentration with rare gas element.Be blended into rare gas element and should ensure that burning stove process carries out smoothly, hotblast stove dome temperature and flue temperature can reach air-supply requirement; And ensureing that oxygen has certain excess quantity, in waste gas, oxygen level is at 0.5%-2.0%.
See Fig. 1, the device of the present embodiment comprises hotblast stove, blast furnace gas pipeline, coke oven gas pipe (namely high heat value gas introduces pipeline), nitrogen pipeline and chimney breast, described blast furnace gas pipeline is connected with hotblast stove, described coke oven gas pipe is connected with blast furnace gas pipeline, and described nitrogen pipeline is connected with the blast furnace gas pipeline between coke oven gas pipe and hotblast stove.
Described chimney breast is provided with measurement of oxygen content device, for detecting the oxygen level in stack gases.
Described device also comprises the comburent air duct be connected with hotblast stove, and this pipeline arranges pressure lock.
Described blast furnace gas pipeline is connected with blast furnace gas main pipe, blast furnace gas pipeline between blast furnace gas main pipe and coke oven gas pipe arranges blank-plate valve, by gas circuit direction, gas regulator and several gas valves can also be set, as shown in Figure 1, this pipeline is provided with the first gas valve and the second gas valve, and is provided with gas regulator.
Described coke-oven gas pipeline is provided with several rapid switching valves and coking coal variable valve, it also can arrange several repid cut-off valves as required, device as shown in Figure 1, is provided with the first repid cut-off valve, coke-oven gas variable valve and the second repid cut-off valve.Also electronic nitrogen valve can be provided with as required in described nitrogen pipeline and on chimney breast.Between described chimney and hotblast stove, can smoke valve be set.
In above each pipeline, valve can increase and decrease as required flexibly; When adopting other high heat value gas as required, respective line also can be suitable for.
Said apparatus can use higher calorific value combustion gas to burn stove, and its concrete grammar comprises:
The first step: close the blank-plate valve on blast furnace gas pipeline
Second step: open the first repid cut-off valve on coke oven gas pipe, the second repid cut-off valve and coke-oven gas variable valve, coke-oven gas is incorporated in blast furnace gas pipeline.
3rd step: when burning stove, open smoke regulating valve, pressure lock, the first gas valve and the second gas valve, open electronic nitrogen valve, nitrogen is allocated in coke-oven gas.
4th step: according to hotblast stove dome temperature rising situation, and the oxygen level in stack gases, open the gas regulator on blast furnace gas pipeline, regulates coke gas flow.Open electronic nitrogen valve and regulate nitrogen flow.Make dome temperature burn 1350-1400 DEG C, the oxygen level in stack gases controls at 0.5%-2%, guarantees coke-oven gas perfect combustion.
Claims (4)
1. a blast furnace ironmaking hotblast stove device, it is characterized in that, described device comprises hotblast stove, blast furnace gas pipeline, high heat value gas introducing pipeline, nitrogen pipeline and chimney breast, described blast furnace gas pipeline is connected with hotblast stove, described high heat value gas is introduced pipeline and is connected with blast furnace gas pipeline, and the blast furnace gas pipeline that described nitrogen pipeline is introduced between pipeline and hotblast stove with high heat value gas is connected.
2. device according to claim 1, is characterized in that, described chimney breast is provided with measurement of oxygen content device.
3. device according to claim 1 and 2, is characterized in that, described device also comprises the comburent air duct be connected with hotblast stove, and this pipeline arranges pressure lock.
4. device according to claim 1 and 2, is characterized in that, described blast furnace gas pipeline is connected with blast furnace gas main pipe, and blast furnace gas main pipe and described high heat value gas are introduced on the blast furnace gas pipeline between pipeline and arranged blank-plate valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420502198.9U CN204058506U (en) | 2014-09-02 | 2014-09-02 | A kind of blast furnace ironmaking hotblast stove device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420502198.9U CN204058506U (en) | 2014-09-02 | 2014-09-02 | A kind of blast furnace ironmaking hotblast stove device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204058506U true CN204058506U (en) | 2014-12-31 |
Family
ID=52200056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420502198.9U Expired - Fee Related CN204058506U (en) | 2014-09-02 | 2014-09-02 | A kind of blast furnace ironmaking hotblast stove device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204058506U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105349724A (en) * | 2015-12-03 | 2016-02-24 | 江苏永钢集团有限公司 | Converter gas blending combustion device for hot blast furnaces |
| CN105586461A (en) * | 2016-03-10 | 2016-05-18 | 山东钢铁股份有限公司 | Purging device and purging method for gas pipeline of hot blast stove |
| CN108004358A (en) * | 2017-12-27 | 2018-05-08 | 中冶京诚工程技术有限公司 | Hot blast stove control system |
| WO2021082643A1 (en) * | 2019-10-31 | 2021-05-06 | 中冶赛迪重庆信息技术有限公司 | Method for dome temperature control during combustion of hot-blast stove, system, and device |
| CN114410870A (en) * | 2022-01-24 | 2022-04-29 | 中天钢铁集团(南通)有限公司 | Smoke control and exhaust system and method for coke oven gas burning of hot blast stove |
-
2014
- 2014-09-02 CN CN201420502198.9U patent/CN204058506U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105349724A (en) * | 2015-12-03 | 2016-02-24 | 江苏永钢集团有限公司 | Converter gas blending combustion device for hot blast furnaces |
| CN105349724B (en) * | 2015-12-03 | 2018-02-02 | 江苏永钢集团有限公司 | Coal gas of converter mingled burning installation for hot-blast stove |
| CN105586461A (en) * | 2016-03-10 | 2016-05-18 | 山东钢铁股份有限公司 | Purging device and purging method for gas pipeline of hot blast stove |
| CN108004358A (en) * | 2017-12-27 | 2018-05-08 | 中冶京诚工程技术有限公司 | Hot blast stove control system |
| WO2021082643A1 (en) * | 2019-10-31 | 2021-05-06 | 中冶赛迪重庆信息技术有限公司 | Method for dome temperature control during combustion of hot-blast stove, system, and device |
| CN114410870A (en) * | 2022-01-24 | 2022-04-29 | 中天钢铁集团(南通)有限公司 | Smoke control and exhaust system and method for coke oven gas burning of hot blast stove |
| CN114410870B (en) * | 2022-01-24 | 2023-03-14 | 中天钢铁集团(南通)有限公司 | Smoke control and exhaust system and method for coke oven gas burning of hot blast stove |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141231 |