CN2591047Y - Hot-blast furnace waste gas comprehensive utilizing device - Google Patents
Hot-blast furnace waste gas comprehensive utilizing device Download PDFInfo
- Publication number
- CN2591047Y CN2591047Y CN 02294195 CN02294195U CN2591047Y CN 2591047 Y CN2591047 Y CN 2591047Y CN 02294195 CN02294195 CN 02294195 CN 02294195 U CN02294195 U CN 02294195U CN 2591047 Y CN2591047 Y CN 2591047Y
- Authority
- CN
- China
- Prior art keywords
- stove
- gas
- hot
- point
- interchanger
- 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.)
- Expired - Lifetime
Links
Images
Landscapes
- Air Supply (AREA)
Abstract
The utility model discloses a waste gas comprehensive utilizing device for hot blast furnaces. The input end A of a smoke gas furnace 2 is connected with a main outlet smoke channel 7 of a hot blast furnace 1, the output end of the smoke gas furnace 2 is connected with a heat exchanger 3, and a main pipe 9 of a coal mill 5 is connected in series with a smoke gas draft fan 4B. The heat exchanger 3 is connected in series with a draft fan 4A, and an outlet smoke channel 8 of the draft fan 4A is connected with a C point on the main outlet smoke channel 7 of the hot blast furnace 1. A lead-in point B of the main pipe 9 of the coal mill 5, which is connected with the smoke gas draft fan 4B, is arranged on the main outlet smoke channel of the hot blast furnace 1, and is positioned in front of a C point at the output end of the heat exchanger 3 and the draft fan 4A which are connected in series. Lead-in branch pipes 10A and 10B are also arranged at the lead-in point of the main pipe of the coal mill, the lead-in branch pipe 10A is connected with an E point between the output end of the smoke gas furnace 2, and the input end of the heat exchanger 3, and the lead-in branch pipe 10B is connected with a D point behind the C point at the outlet end of the heat exchanger 3 and the draft fan 4A which are connected in series. The waste gas comprehensive utilizing device for hot blast furnaces has the advantages of high efficiency, investment saving and reduction in land occupation area.
Description
Technical field
The utility model belongs to blast furnace and uses the hotblast stove field, particularly relates to the device of blast-furnace hot-air furnace exhaust comprehensive utilization.
Background technology
Exhaust gas of hot-blast stove is the thermal source of preheating gas and combustion air, also is the good coal dust drying medium of coal injection and pulverization.Improving hot-blast furnace temperature and increasing injecting coal quantity is the effective measure that reduce coke ratio, reduction pig iron cost and reduce environmental pollution.With low combustion value furnace gas preheating gas and combustion air, be the physics heat that improves coal gas and combustion air, improve theoretical combustion temperature, thereby improve the effective means of hot blast temperature.At present, for fully reclaiming the hot-blast stove fume waste heat, use single blast furnace gas to obtain 1200 ℃ or higher wind-warm syndrome, the exhaust gas of hot-blast stove comprehensive utilization device interchanger methods that adopt additional flue gas stove more, for satisfying the requirement of coal dust drying to flue-gas temperature, pulverized coal preparation system need be provided with a cover flue gas stove again mixed flue gas is heated up.Promptly this exhaust gas of hot-blast stove comprehensive utilization device comprises that hotblast stove, coal gas and combustion air preheating flue gas stove, gas change heater, combustion air interchanger, coal dust dry flue gas stove, smoke induced draught fan and coal pulverizer constitute.With induced draft fan exhaust gas of hot-blast stove is guided to the flue gas stove, the high-temperature flue gas that produces with the flue gas stove mixes, mixed flue gas enters gas change heater preheating gas and air heat exchanger warm-up combustion-supporting air respectively, and the flue gas after coal gas and the combustion air heat exchange enters hot-blast stove flue; Coal injection and pulverization drying medium leading point be arranged on through the flue gas behind the intact coal gas of interchanger preheating, the air or with the back of exhaust gas of hot-blast stove mixed flue gas.Since the coal dust drying all draw behind intact coal gas and air through the interchanger preheating flue gas or with the mixed mixed flue gas of exhaust gas of hot-blast stove, the exhaust gas of hot-blast stove waste heat has obtained once reclaiming when coal gas, preheating of air, interchanger is discharged flue-gas temperature and is lower than the exhaust gas of hot-blast stove temperature, mixed flue-gas temperature is lower than the exhaust gas of hot-blast stove temperature, mixed flue gas, its temperature can not satisfy the requirement of powder process drying to flue-gas temperature.Therefore, the flue gas heating furnace need be set in addition, flue gas is heated up again,, increase the investment and the floor space of building the flue gas heating furnace thus to satisfy the demand of coal dust drying to flue-gas temperature in the coal injection and pulverization system.
Summary of the invention
Technical problem to be solved in the utility model: a kind of comprehensive utilization ratio height is provided, and device is simplified, less investment, the exhaust gas of hot-blast stove comprehensive utilization device that floor space is little.
The exhaust gas of hot-blast stove comprehensive utilization device, comprise: hotblast stove, flue gas stove, interchanger, smoke induced draught fan (A, B), coal pulverizer, chimney and flue collector, the input terminus of flue gas stove is connected on the outlet flue collector of hotblast stove, the output terminal of flue gas stove links to each other with interchanger, and the main pipe line of coal pulverizer links to each other with smoke induced draught fan (B); The introducing point that the main pipe line of coal pulverizer links to each other with smoke induced draught fan (B) is arranged on the outlet flue collector of hotblast stove, and is positioned at before interchanger, the placed in-line relief outlet end of induced draft fan (A); Interchanger and induced draft fan (A) polyphone, the relief outlet flue of induced draft fan (A) is connected on the outlet flue collector of hotblast stove.
On coal pulverizer main pipe line introducing point, also be provided with and introduce arm (A, B), coal pulverizer is introduced between the input terminus of output terminal that arm (A) is connected the flue gas stove and interchanger, and coal pulverizer introducing arm (B) is connected after interchanger, the placed in-line relief outlet end of induced draft fan (A).
Owing to adopt direct introducing point to be arranged on the outlet flue collector of hotblast stove, and be positioned at before the relief outlet end of interchanger, induced draft fan (A) with the dry coal pulverizer of coal injection and pulverization; That is: induced draft fan (B) coal pulverizer directly uses exhaust gas of hot-blast stove as coal dust drying medium, and exhaust gas of hot-blast stove temperature height is near the flue-gas temperature of coal pulverizer needs.Thereby the waste gas of high heating value is fully used, has reduced gas consumption; Improve the efficient of exhaust gas of hot-blast stove comprehensive utilization, reduced investment outlay, reduced floor space simultaneously.
Because interchanger is connected with induced draft fan (A), after employing was arranged on interchanger with induced draft fan, after hot flue gas process interchanger and coal gas, combustion air carried out heat exchange, temperature reduced; Thereby induced draft fan work at a lower temperature, and various technical features are guaranteed easily.
Owing to introduce between the input terminus that also is provided with the output terminal that is connected the flue gas stove and interchanger on the point and interchanger at the coal pulverizer main pipe line, introducing arm (A after the relief outlet end of induced draft fan (A), B), when the exhaust gas of hot-blast stove temperature is higher than the powder process drying and requires, can adopt the exhaust gas volumn cooling of drawing behind the interchanger, when the exhaust gas of hot-blast stove temperature is lower than the powder process drying and requires, can adopt the mixed flue gas that draws flue gas stove and hotblast stove to heat up, thereby increased flexibility of operation of the present utility model, the coal injection and pulverization dehumidification system has maximally utilised exhaust gas of hot-blast stove, has reduced the flue gas kiln gas.
In a word, compared with prior art the utility model exhaust gas of hot-blast stove comprehensive utilization device has and both takes into account interchanger and need higher flue-gas temperature needs, takes into account the advantage of coal dust drying caloric requirement again.Be mixed into temperature higher mixed flue gas preheating gas or combustion air with flue gas stove high-temperature flue gas and part exhaust gas of hot-blast stove, with the dry coal dust of the relatively low part exhaust gas of hot-blast stove of temperature; Make the exhaust gas flow and the temperature of whole hotblast stove be in equilibrium state, exhaust gas of hot-blast stove is maximally utilised by coal gas, preheating of air and coal dust drying.
Below in conjunction with accompanying drawing the utility model most preferred embodiment is elaborated.
Description of drawings
Fig. 1 is the structural representation of the utility model exhaust gas of hot-blast stove comprehensive utilization device;
Fig. 2 is the structure example synoptic diagram of prior art exhaust gas of hot-blast stove comprehensive utilization device.
Embodiment
By shown in Figure 1, the exhaust gas of hot-blast stove comprehensive utilization device is made up of hotblast stove 1, flue gas stove 2, interchanger 3, smoke induced draught fan (4A, 4B), coal pulverizer 5, chimney 6 and flue collector 7.The input terminus A of flue gas stove 2 is connected on the outlet flue collector 7 of hotblast stove 1, and the output terminal of flue gas stove 2 links to each other with interchanger 3, and interchanger 3 is connected with induced draft fan 4A, and the relief outlet flue 8 of induced draft fan 4A is connected C point on the outlet flue collector 7 of hotblast stove 1; The main pipe line 9 of coal pulverizer 5 is connected with induced draft fan 4B, and the introducing point B that the main pipe line 9 of coal pulverizer 5 links to each other with smoke induced draught fan 4B is arranged on the outlet flue collector 7 of hotblast stove 1, and is positioned at before interchanger 3, the placed in-line relief outlet end of the induced draft fan 4A C point.Interchanger 3 is gas change heater 3A, air heat exchanger 3B of two parallel with one another, series connection or series-parallel connection.
On the main pipe line 9 introducing points of coal pulverizer 5, also be provided with and introduce arm 10A, 10B, coal pulverizer is introduced E point between the input terminus of output terminal that arm 10A is connected flue gas stove 2 and interchanger 3, and coal pulverizer is introduced arm 10B and is connected interchanger 3, the placed in-line relief outlet end of induced draft fan 4A C point D point afterwards.
During work, exhaust gas of hot-blast stove is discharged through its main pipe line, and is higher when the exhaust gas of hot-blast stove temperature, draws single exhaust gas of hot-blast stove, reduces or without the flue gas of flue gas stove, can satisfy the powder process requirement.Flue gas stove burning blast furnace gas produces high-temperature flue gas, and the flue gas kiln gas is mixed with exhaust gas of hot-blast stove, and mixed flue gas enters gas change heater, combustion air interchanger respectively, enters in the main pipe line of hotblast stove with flue gas after coal gas, the combustion air heat exchange.When the exhaust gas of hot-blast stove temperature is higher than the powder process requirement, can increases and draw exhaust gas volumn cooling behind the interchanger; When the exhaust gas of hot-blast stove temperature is lower than the powder process requirement, can increase the mixed flue gas that draws flue gas kiln gas and exhaust gas of hot-blast stove and heat up; When changing-over stove, hot-blast stove fume quantity not sufficient, can increase the mixed back flue gas behind the mixed flue gas that draws flue gas stove and exhaust gas of hot-blast stove and the interchanger simultaneously.Thereby increased the flexibility of operation of this device.
Shown in Fig. 1,2, with 2000m
3Blast furnace is an example, and the basic designing technique parameter of blast furnace is as follows:
| Content | Unit | Data | |
| The blast furnace useful volume | m 3 | 2000 | |
| The capacity factor of a blast furnace | t/m 3.d | 2.0～2.3 | |
| Hotblast stove | Seat | 3 | |
| Air blast flux | Nm 3/h | 258000 | |
| Operating duty | Two burn one send | ||
| The air-supply cycle | h | 0.75 | |
| Combustion period | h | 1.35 | |
| The coal gas initial temperature | ℃ | 35 | |
| The combustion air initial temperature | ℃ | 20 | |
| Coal powder blowing amount | kg/t | 200 |
The exhaust gas of hot-blast stove comprehensive utilization device technical parameter contrast table of the utility model and prior art:
| Project | Unit | The utility model | Prior art |
| The hot air furnace hot air temperature | ℃ | 1210 | 1210 |
| The exhaust gas of hot-blast stove temperature | ℃ | 260 | 260 |
| Interchanger mixed flue gas temperature | ℃ | 500 | 500 |
| Install total gas consumption amount | Nm 3/h | 189508 | 196550 |
| Install total air consumption | Nm 3/h | 127237 | 132377 |
| The total discharging of device exhaust gas volumn | Nm 3/h | 294269 | 305536 |
| Install total exhaust temperature | ℃ | 123 | 151 |
Can draw from the contrast of last table: when the exhaust gas of hot-blast stove temperature was 500 ℃ of 260 ℃, heat exchanger entrance mixed flue gas temperature, exhaust gas of hot-blast stove comprehensive utilization device blast furnace gas consumption of the present utility model reduced 7042Nm
3/ h, combustion air consumption reduces 5140Nm
3/ h, it always discharges exhaust gas volumn and reduces 11267Nm
3/ h, and total smog discharge temperature of this device has also lowered 28 ℃.Therefore, the utility model not only can use low-heat value gas to obtain high wind-warm syndrome, uses the dry coal dust of the relatively low part exhaust gas of hot-blast stove of temperature simultaneously, thereby satisfies two preheatings and powder process requirement, has improved working efficiency.
Claims (3)
1. exhaust gas of hot-blast stove comprehensive utilization device, comprise: hotblast stove (1), flue gas stove (2), interchanger (3), smoke induced draught fan (4A, 4B), coal pulverizer (5), chimney (6) and flue collector (7), the input terminus A of flue gas stove (2) is connected on the outlet flue collector (7) of hotblast stove (1), the output terminal of flue gas stove (2) links to each other with interchanger (3), and the main pipe line (9) of coal pulverizer (5) is connected with smoke induced draught fan (4B); It is characterized in that: the main pipe line (9) of described coal pulverizer (5) is arranged on the outlet flue collector (7) of hotblast stove (1) with the introducing point B of smoke induced draught fan (4B), and is positioned at before interchanger (3), the placed in-line relief outlet end of induced draft fan (4A) the C point; Described interchanger (3) is connected with induced draft fan (4A), and the relief outlet flue (8) of induced draft fan (4A) is connected the outlet flue collector (7) of hotblast stove (1) and goes up the C point.
2. exhaust gas of hot-blast stove comprehensive utilization device according to claim 1, it is characterized in that: on the main pipe line (9) of described coal pulverizer (5), also be provided with and introduce arm (10A, 10B), coal pulverizer is introduced the E point between the input terminus of output terminal that arm (10A) is connected flue gas stove (2) and interchanger (3), and coal pulverizer is introduced arm (10B) and is connected interchanger (3), the placed in-line relief outlet end of induced draft fan (4A) C point D point afterwards.
3. the device of exhaust gas of hot-blast stove comprehensive utilization according to claim 1 and 2 is characterized in that; Described interchanger (3) is two gas change heaters parallel with one another (3A) and air heat exchanger (3B), also can be two mutual placed in-line gas change heaters (3A) and air heat exchanger (3B) or their series-parallel connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02294195 CN2591047Y (en) | 2002-12-31 | 2002-12-31 | Hot-blast furnace waste gas comprehensive utilizing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02294195 CN2591047Y (en) | 2002-12-31 | 2002-12-31 | Hot-blast furnace waste gas comprehensive utilizing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2591047Y true CN2591047Y (en) | 2003-12-10 |
Family
ID=33751778
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02294195 Expired - Lifetime CN2591047Y (en) | 2002-12-31 | 2002-12-31 | Hot-blast furnace waste gas comprehensive utilizing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2591047Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103206702A (en) * | 2013-01-15 | 2013-07-17 | 江苏巴威工程技术股份有限公司 | Energy-saving device |
| CN103451342A (en) * | 2013-09-05 | 2013-12-18 | 鞍钢股份有限公司 | Device and method for increasing temperature of hot air in blast furnace |
| CN103834755A (en) * | 2014-02-28 | 2014-06-04 | 中冶南方工程技术有限公司 | Pulverized coal preheating technique of blast furnace coal injection system |
| CN103966379A (en) * | 2014-05-25 | 2014-08-06 | 北京首钢国际工程技术有限公司 | Waste air recycling device of hot blast stove with waste air buffer tank |
| CN109055641A (en) * | 2018-08-31 | 2018-12-21 | 中冶南方工程技术有限公司 | Recycle the heat exchanger purging soot cleaning system and method for hot-blast stove emission coal gas |
| CN109082492A (en) * | 2018-08-31 | 2018-12-25 | 中冶南方工程技术有限公司 | A kind of heat exchanger purge system and method using hot-blast stove release exhaust gas |
| CN110617715A (en) * | 2019-10-14 | 2019-12-27 | 云南德胜钢铁有限公司 | Hot blast stove high-temperature waste gas recycling method |
| CN115044726A (en) * | 2022-06-15 | 2022-09-13 | 广东韶钢松山股份有限公司 | Device system and method for controlling flue gas of blast furnace hot blast stove |
-
2002
- 2002-12-31 CN CN 02294195 patent/CN2591047Y/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103206702A (en) * | 2013-01-15 | 2013-07-17 | 江苏巴威工程技术股份有限公司 | Energy-saving device |
| CN103451342A (en) * | 2013-09-05 | 2013-12-18 | 鞍钢股份有限公司 | Device and method for increasing temperature of hot air in blast furnace |
| CN103451342B (en) * | 2013-09-05 | 2015-07-08 | 鞍钢股份有限公司 | Device and method for increasing temperature of hot air in blast furnace |
| CN103834755A (en) * | 2014-02-28 | 2014-06-04 | 中冶南方工程技术有限公司 | Pulverized coal preheating technique of blast furnace coal injection system |
| CN103966379A (en) * | 2014-05-25 | 2014-08-06 | 北京首钢国际工程技术有限公司 | Waste air recycling device of hot blast stove with waste air buffer tank |
| CN103966379B (en) * | 2014-05-25 | 2015-08-05 | 北京首钢国际工程技术有限公司 | A kind of hotblast stove with useless wind surge tank gives up wind retrieving arrangement |
| CN109055641A (en) * | 2018-08-31 | 2018-12-21 | 中冶南方工程技术有限公司 | Recycle the heat exchanger purging soot cleaning system and method for hot-blast stove emission coal gas |
| CN109082492A (en) * | 2018-08-31 | 2018-12-25 | 中冶南方工程技术有限公司 | A kind of heat exchanger purge system and method using hot-blast stove release exhaust gas |
| CN109055641B (en) * | 2018-08-31 | 2020-05-08 | 中冶南方工程技术有限公司 | Heat exchanger purging and ash removing system and method for recycling coal gas emitted by hot blast stove |
| CN110617715A (en) * | 2019-10-14 | 2019-12-27 | 云南德胜钢铁有限公司 | Hot blast stove high-temperature waste gas recycling method |
| CN115044726A (en) * | 2022-06-15 | 2022-09-13 | 广东韶钢松山股份有限公司 | Device system and method for controlling flue gas of blast furnace hot blast stove |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103363811A (en) | Combustion method of high-temperature oxygen-mixed flue gas | |
| CN2863813Y (en) | High-air temperature multi-functional grouping residual heat system for blast furnace | |
| CN2591047Y (en) | Hot-blast furnace waste gas comprehensive utilizing device | |
| CN101634529B (en) | Preheating system of plate heat exchanger of hot blast furnace | |
| CN200996026Y (en) | Assembled heat-exchanging system for realizing hot blast furnace | |
| CN103088178A (en) | Blast furnace hot-blast stove flue gas self-circulation combustion method and system | |
| CN2903871Y (en) | High air temp. backheating tunnel kiln | |
| CN105115155A (en) | Biofuel hot-blast stove | |
| CN101928797A (en) | High-blast-temperature energy-saving and emission-reducing combined type preheating system for blast furnace | |
| CN101928796A (en) | High wind temperature energy saving and emission reduction combined preheating method for blast furnace | |
| CN103063044A (en) | Rotary hearth furnace flue gas waste heat utilization system and rotary hearth furnace flue gas waste heat utilization method | |
| CN1301335C (en) | High-air temp hot-blast stove for blast furnace | |
| CN201062796Y (en) | Apparatus for secondary pre-heating combustion air for oil gas multifuel combustion heating furnace | |
| CN201785422U (en) | High-air-temperature energy-saving emission-reduction combined preheating system of blast furnace | |
| CN1084792C (en) | High air-temperature high furnace space gas preheating method | |
| CN202470782U (en) | Secondary smoke residual heat utilization system for hot blast stove | |
| CN201289268Y (en) | Carbon white drying system using fire coal circulating fluid bed hot-air stove | |
| CN201266035Y (en) | Pre-heating system for plate heat exchanger of hot-air furnace | |
| CN205002373U (en) | Biomass fuel hot blast stove | |
| CN101503193B (en) | White carbon black drying system using fire coal circulating fluid bed hot-air furnace | |
| CN203373367U (en) | Smoke waste-heat utilization system of hot blast furnace | |
| CN202246727U (en) | High-blast-temperature combinative heat exchange system of blast furnace | |
| CN2669131Y (en) | Blast furnace high-air-temperature combined heat-exchange system | |
| CN102283433B (en) | Saving-energy method and device for curing tobaccos by recycling humidity-discharging waste heat in curing barn | |
| CN112432491A (en) | Method and device for humidifying and increasing temperature of combustion-supporting air of hot blast stove |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20130104 Granted publication date: 20031210 |