CN203373366U - Hot-blast stove system for achieving high blast temperature by only burning blast furnace - Google Patents
Hot-blast stove system for achieving high blast temperature by only burning blast furnace Download PDFInfo
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- CN203373366U CN203373366U CN201320330213.1U CN201320330213U CN203373366U CN 203373366 U CN203373366 U CN 203373366U CN 201320330213 U CN201320330213 U CN 201320330213U CN 203373366 U CN203373366 U CN 203373366U
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Abstract
The utility model discloses a hot-blast stove system for achieving high blast temperature by only burning blast furnace gas. The hot-blast stove system comprises a hot-blast stove, a blast furnace gas pipe, a combustion-supporting air duct, a hot air duct and a flue duct, wherein the hot-blast stove is connected with the blast furnace gas pipe, the combustion-supporting air duct, the hot air duct and the flue duct respectively; the hot-blast stove system is also provided with a heat exchange system for heat exchange between combustion-supporting air at the temperature of 30 DEG C blown out from an external combustion fan, blast furnace gas at the temperature of 80 DEG C introduced by an outer blast furnace gas pipe, and flue gas discharged from the hot-blast stove; the heat exchange system is connected with the hot-blast stove through the furnace gas pipe, the combustion-supporting air duct and the flue duct respectively. The hot-blast stove system has the advantages that the floor space is small, the investment is low, the productive maintenance is simple, safe, reliable and the like, and the hot-blast stove system is applicable to construction of new blast-furnace projects and on-line modification of old blast furnace hot blast stove preheating systems.
Description
Technical field
The utility model belongs to steel industry blast-furnace equipment field, is specifically related to the hot blast stove system of the high wind-warm syndrome of a kind of pure burning blast-furnace gas.
Background technology
In recent years, the cost pressure of steel industry is increasing, and the cost of blast furnace ironmaking link shows more outstandingly, and wherein iron work is using coke ratio as an important indicator weighing ironmaking cost.At present, reduce coke ratio except trying every possible means in the aspects such as quality from blast furnace production operation level and crude fuel, the wind pushing temperature that improves hotblast stove is also a kind of means that generally adopt, and effect is also apparent in view; According to statistics, hot blast temperature more than 1150 ℃ the time, improves 100 ℃ of wind-warm syndrome, can save coke 8～15kg/tFe.In order to reach wind-warm syndrome more than 1250 ℃, the high performance fuel such as minority enterprise employing enrichment coal gas (coke-oven gas, coal gas of converter) carry out the hot stove furnace operating, but, most of Steel Plant high heating value gas is more and more nervous, utilizes Experience of Using Single Bf Gas to burn stove and realizes that high wind-warm syndrome becomes the preferred option of each enterprise.
Summary of the invention
The purpose of this utility model is for adopting pure burning blast-furnace gas, intends adopting minimum equipment configuration, reduces equipment working cost in production process as far as possible, reduces production costs, and realizes the hotblast stove wind pushing temperature more than 1250 ℃.
The technical scheme that the utility model adopts is: a kind of pure burning blast-furnace gas is realized the hot blast stove system of high wind-warm syndrome, comprising: hotblast stove, blast furnace gas pipeline, combustion air pipeline, hot air duct and flue; Described hotblast stove is respectively at described blast furnace gas pipeline, combustion air pipeline, hot air duct and be connected for flue; It is characterized in that: described hot blast stove system also is provided with for outside burner blower and bloats the heat exchange system that flue gas that the combustion air of 30 ℃, 80 ℃ of blast furnace gases being sent into by the outer net blast furnace gas pipeline and described hotblast stove discharge carries out heat exchange, and described heat exchange system is respectively by described producer gas pipeline, combustion air pipeline be connected with described hotblast stove for flue.
As preferably, the blast furnace gas that the described combustion air bloated by outside burner blower is 30 ℃, sent into by the outer net blast furnace gas pipeline is 80 ℃.
As preferably, described heat exchange system comprises air heat exchanger, gas change heater and gas furnace; The combustion air that outside burner blower bloats is sent into described combustion gas furnace as combustion air through a described combustion air pipeline part, another part, after described combustion air pipeline is sent into described combustion air interchanger and is preheated to more than 250 ℃, is sent in the vault burner of described hotblast stove through described combustion air pipeline; The blast furnace gas of being sent into by the outer net blast furnace gas pipeline enters described combustion gas furnace through a described blast furnace gas pipeline part and makes fuel, another part is after described blast furnace gas pipeline enters described gas change heater and is preheated to more than 250 ℃, through described blast furnace gas pipeline, send in the vault burner of described hotblast stove, high-temperature flue-gas after burning reaches more than 1350 ℃, described high-temperature flue gas after the regenerator high efficient lattice brick of described hotblast stove, is discharged through the described hot air duct of described hotblast stove bottom from top to bottom; The flue gas that described hotblast stove is discharged enters described heat exchange system by described flue and carries out heat exchange, the flue gas that described hotblast stove is discharged mixes with the high-temperature flue gas that described combustion gas furnace produces, this flue gas enters respectively described combustion air interchanger and blast furnace gas heat exchange device after described flue properly distributed, after after heat exchange, described flue-gas temperature is down to below 150 ℃ separately, through smoke stack emission.
As preferably, the flue gas that described hotblast stove is discharged is 300 ℃, and the high-temperature flue gas that described combustion gas furnace produces is 600 ℃, and the flue gas that described hotblast stove is discharged mixes with the high-temperature flue gas of described combustion gas furnace generation, and mixed flue-gas temperature is 380 ℃.
As preferably, the interchanger that described air heat exchanger, gas change heater are high temperature resistant flue gas.
As preferably, described air heat exchanger, gas change heater are the plate-type heat exchanger that adopts stainless steel part to make.
As preferably, described blast furnace gas pipeline, combustion air pipeline, all adopt the Q345B steel pipe.
As preferably, described hotblast stove is high-power top combustion type hot air burner.
As preferably, described hotblast stove is three groups, after its parallel join respectively with described blast furnace gas pipeline, combustion air pipeline, hot air duct be connected for flue.
The utility model, with other technical process, compare, reach equally under the prerequisite of high wind-warm syndrome, with minimum construction cost and optimum design, thereby allow whole system reach effect preferably, the utlity model has occupation of land less, the advantage such as reduced investment, production maintenance be simple, safe and reliable, be applicable to newly-built blast furnace engineering, also be applicable to old blast-furnace hot-air furnace preheating system Online revamp.The utility model has been realized a kind of technical process innovation of hot blast stove system.
The accompanying drawing explanation
Fig. 1: be hot blast stove system process flow sheet of the present utility model.
Embodiment
Further describe the technical program below in conjunction with the reference accompanying drawing, the example of described embodiment is shown in the drawings, wherein same or similar label means same or similar element or the element with identical or similar functions from start to finish, but this description is only for explaining the utility model, and can not be interpreted as restriction of the present utility model.
Ask for an interview Fig. 1, the technical scheme that the utility model adopts is: a kind of pure burning blast-furnace gas is realized the hot blast stove system of high wind-warm syndrome, comprise: hotblast stove 4, blast furnace gas pipeline 5, combustion air pipeline 6, hot air duct 7, flue 8 and bloat the heat exchange system that flue gas that the combustion air of 30 ℃, 80 ℃ of blast furnace gases being sent into by the outer net blast furnace gas pipeline and hotblast stove 4 discharge carries out heat exchange for outside burner blower, heat exchange system comprises air heat exchanger 1, gas change heater 2 and gas furnace 3; The plate-type heat exchanger that the employing stainless steel part that air heat exchanger 1, gas change heater 2 are high temperature resistant flue gas is made; Blast furnace gas pipeline 5, combustion air pipeline 6, all adopt steel pipe; Hotblast stove 4 is high-power top combustion type hot air burner; Hotblast stove 4 is three groups, after its parallel join respectively at blast furnace gas pipeline 5, combustion air pipeline 6, hot air duct 7 be connected for flue 8; Outside burner blower bloats the combustion air of 30 ℃ and sends into combustion gas furnace 3 as combustion air through combustion air pipeline 6 parts, another part, after combustion air pipeline 6 is sent into combustion air interchanger 1 and is preheated to more than 250 ℃, is sent in the vault burner of hotblast stove 4 through combustion air pipeline 6; 80 ℃ of blast furnace gases being sent into by the outer net blast furnace gas pipeline enter combustion gas furnace 3 through blast furnace gas pipeline 5 parts and make fuel, another part is after blast furnace gas pipeline 5 enters gas change heater 2 and is preheated to more than 250 ℃, through blast furnace gas pipeline 5, send in the vault burner of hotblast stove 4, high-temperature flue-gas after burning reaches more than 1350 ℃, high-temperature flue gas after the regenerator high efficient lattice brick of hotblast stove 3, is discharged through the hot air duct 7 of hotblast stove 3 bottoms from top to bottom; 300 ℃ of flue gases that hotblast stove 4 is discharged enter heat exchange system by flue 8 and carry out heat exchange, 300 ℃ of flue gases mix with 600 ℃ of high-temperature flue gas that combustion gas furnace 3 produces, mixed flue-gas temperature is 380 ℃, this flue gas enters respectively combustion air interchanger 1 and blast furnace gas heat exchange device 2 after flue 8 properly distributed, after after heat exchange, flue-gas temperature is down to 150 ℃ separately, through smoke stack emission.
Workflow of the present utility model is: from 300 ℃ of flue gases of hotblast stove discharge, a combustion gas furnace is set entering interchanger from flue, combustion gas furnace has 600 ℃ of high-temperature flue gas of blast furnace gas combustion, this high-temperature flue gas mixes certainly with the low-temperature flue gas in flue, mixed flue-gas temperature is 380 ℃, through the flue properly distributed, enter respectively gas change heater and air heat exchanger wherein, gas change heater 1 is preheated to 250 ℃ by blast furnace gas from 80 ℃, and the blast furnace gas after preheating enters in hotblast stove and burns; Air heat exchanger is preheated to 250 ℃ by combustion air from 30 ℃, and the combustion air after preheating enters hotblast stove; Blast furnace gas and combustion air after preheating enter hotblast stove, and the flue-gas temperature after burning makes the hotblast stove vault reach desirable temperature fully, thereby while meeting the hotblast stove air-supply, wind-warm syndrome reaches more than 1250 ℃.
Gas change heater 1 of the present utility model and air heat exchanger 2 must meet the working temperature requirement of 380 ℃ of flue gases, combustion gas furnace 3 provides crude fuel by gas line 5 and the combustion air pipeline 6 of hot blast stove system self, do not need additionally to set up the power-equipments such as blower fan, simultaneously, the low-temperature flue gas of the high-temperature flue gas and hotblast stove self that combustion gas furnace 3 produces realizes that in flue 8 nature mixes, do not need additionally to set up the power systems such as waste gas induced draft fan, mixed flue gas is shunted flue gas flow by rational pipe diameter and valve design, finally realize the pre-heat effect that interchanger is good.With other high temperature preheating technical process, compare, this novel process does not increase extra power-equipment, except combustion gas furnace 3 needs a small amount of blast furnace gas of burning, does not increase other energy consumption, and flow process is simply efficient, and production maintenance is convenient, has application value widely.
These are only preferred embodiment of the present utility model; be not intended to limit protection domain of the present utility model; therefore, all any modifications of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model within spirit of the present utility model and principle.
Claims (9)
1. a pure burning blast-furnace gas is realized the hot blast stove system of high wind-warm syndrome, comprising: hotblast stove (4), blast furnace gas pipeline (5), combustion air pipeline (6), hot air duct (7) and flue (8); Described hotblast stove (4) is respectively at described blast furnace gas pipeline (5), combustion air pipeline (6), hot air duct (7) and be connected for flue (8); It is characterized in that: described hot blast stove system also is provided with the heat exchange system that flue gas that the combustion air bloated for outside burner blower, the blast furnace gas of being sent into by the outer net blast furnace gas pipeline and described hotblast stove (4) discharge carries out heat exchange, and described heat exchange system is respectively by described producer gas pipeline (5), combustion air pipeline (6) be connected with described hotblast stove (4) for flue (8).
2. pure burning blast-furnace gas according to claim 1 is realized the hot blast stove system of high wind-warm syndrome, it is characterized in that: the blast furnace gas that the described combustion air bloated by outside burner blower is 30 ℃, sent into by the outer net blast furnace gas pipeline is 80 ℃.
3. pure burning blast-furnace gas according to claim 1 is realized the hot blast stove system of high wind-warm syndrome, it is characterized in that: described heat exchange system comprises air heat exchanger (1), gas change heater (2) and gas furnace (3);
The combustion air that outside burner blower bloats is sent into described combustion gas furnace (3) as combustion air through described combustion air pipeline (a 6) part, another part, after described combustion air pipeline (6) is sent into described combustion air interchanger (1) and is preheated to more than 250 ℃, is sent in the vault burner of described hotblast stove (4) through described combustion air pipeline (6);
The blast furnace gas of being sent into by the outer net blast furnace gas pipeline enters described combustion gas furnace (3) through described blast furnace gas pipeline (a 5) part and makes fuel, another part is after described blast furnace gas pipeline (5) enters described gas change heater (2) and is preheated to more than 250 ℃, through described blast furnace gas pipeline (5), send in the vault burner of described hotblast stove (4), high-temperature flue-gas after burning reaches more than 1350 ℃, described high-temperature flue gas is from top to bottom after the regenerator high efficient lattice brick of described hotblast stove (3), described hot air duct (7) through described hotblast stove (3) bottom is discharged,
The flue gas that described hotblast stove (4) is discharged enters described heat exchange system by described flue (8) and carries out heat exchange, the flue gas that described hotblast stove (4) is discharged mixes with the high-temperature flue gas that described combustion gas furnace (3) produces, this flue gas enters respectively described combustion air interchanger (1) and blast furnace gas heat exchange device (2) after described flue (8) properly distributed, after after heat exchange, described flue-gas temperature is down to below 150 ℃ separately, through smoke stack emission.
4. pure burning blast-furnace gas according to claim 3 is realized the hot blast stove system of high wind-warm syndrome, it is characterized in that: the flue gas that described hotblast stove (4) is discharged is 300 ℃, the high-temperature flue gas that described combustion gas furnace (3) produces is 600 ℃, the flue gas that described hotblast stove (4) is discharged mixes with the high-temperature flue gas that described combustion gas furnace (3) produces, and mixed flue-gas temperature is 380 ℃.
5. pure burning blast-furnace gas according to claim 2 is realized the hot blast stove system of high wind-warm syndrome, it is characterized in that: described air heat exchanger (1), gas change heater (2) are the interchanger of high temperature resistant flue gas.
6. pure burning blast-furnace gas according to claim 2 is realized the hot blast stove system of high wind-warm syndrome, it is characterized in that: described air heat exchanger (1), gas change heater (2) are the plate-type heat exchanger that adopts stainless steel part to make.
7. pure burning blast-furnace gas according to claim 1 is realized the hot blast stove system of high wind-warm syndrome, it is characterized in that: described blast furnace gas pipeline (5), combustion air pipeline (6) all adopt the Q345B steel pipe.
8. pure burning blast-furnace gas according to claim 1 is realized the hot blast stove system of high wind-warm syndrome, it is characterized in that: described hotblast stove (4) is high-power top combustion type hot air burner.
9. pure burning blast-furnace gas according to claim 1 is realized the hot blast stove system of high wind-warm syndrome, it is characterized in that: described hotblast stove (4) is three groups, after its parallel join respectively with described blast furnace gas pipeline (5), combustion air pipeline (6), hot air duct (7) be connected for flue (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320330213.1U CN203373366U (en) | 2013-06-08 | 2013-06-08 | Hot-blast stove system for achieving high blast temperature by only burning blast furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320330213.1U CN203373366U (en) | 2013-06-08 | 2013-06-08 | Hot-blast stove system for achieving high blast temperature by only burning blast furnace |
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| CN203373366U true CN203373366U (en) | 2014-01-01 |
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| CN201320330213.1U Expired - Fee Related CN203373366U (en) | 2013-06-08 | 2013-06-08 | Hot-blast stove system for achieving high blast temperature by only burning blast furnace |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103320561A (en) * | 2013-06-08 | 2013-09-25 | 中冶南方工程技术有限公司 | Hot-blast stove system for high air temperature by using pure blast furnace gas and method thereof |
| CN103740873A (en) * | 2014-01-27 | 2014-04-23 | 中冶东方工程技术有限公司 | Blast furnace ironmaking system |
| CN106399612A (en) * | 2016-11-07 | 2017-02-15 | 上海铁戈炉业有限公司 | Preheating energy saving system and preheating method |
| CN107227382A (en) * | 2017-07-31 | 2017-10-03 | 中冶京诚工程技术有限公司 | Hot blast stove system of blast furnace |
| CN110129497A (en) * | 2019-05-13 | 2019-08-16 | 鞍钢集团工程技术有限公司 | Pulverized coal injection in blast furnace is connected pre-heating technique and system with hot-blast stove air/gas |
| 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 |
-
2013
- 2013-06-08 CN CN201320330213.1U patent/CN203373366U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103320561A (en) * | 2013-06-08 | 2013-09-25 | 中冶南方工程技术有限公司 | Hot-blast stove system for high air temperature by using pure blast furnace gas and method thereof |
| CN103740873A (en) * | 2014-01-27 | 2014-04-23 | 中冶东方工程技术有限公司 | Blast furnace ironmaking system |
| CN103740873B (en) * | 2014-01-27 | 2015-12-02 | 中冶东方工程技术有限公司 | A kind of system for blast furnace ironmaking |
| CN106399612A (en) * | 2016-11-07 | 2017-02-15 | 上海铁戈炉业有限公司 | Preheating energy saving system and preheating method |
| CN106399612B (en) * | 2016-11-07 | 2019-01-25 | 上海铁戈炉业有限公司 | A kind of preheating energy-saving systems and pre-heating mean |
| CN107227382A (en) * | 2017-07-31 | 2017-10-03 | 中冶京诚工程技术有限公司 | Hot blast stove system of blast furnace |
| CN110129497A (en) * | 2019-05-13 | 2019-08-16 | 鞍钢集团工程技术有限公司 | Pulverized coal injection in blast furnace is connected pre-heating technique and system with hot-blast stove air/gas |
| CN110129497B (en) * | 2019-05-13 | 2024-04-16 | 鞍钢集团工程技术有限公司 | Series preheating process and system for pulverized coal injection of blast furnace and air/gas of hot blast stove |
| 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 |
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| 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: 20140101 Termination date: 20160608 |