CN216337762U - Hot-blast furnace trades stove waste gas mutual pressurizing system - Google Patents
Hot-blast furnace trades stove waste gas mutual pressurizing system Download PDFInfo
- Publication number
- CN216337762U CN216337762U CN202122034423.3U CN202122034423U CN216337762U CN 216337762 U CN216337762 U CN 216337762U CN 202122034423 U CN202122034423 U CN 202122034423U CN 216337762 U CN216337762 U CN 216337762U
- Authority
- CN
- China
- Prior art keywords
- waste gas
- hot blast
- blast stove
- pressurizing
- pipeline
- 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.)
- Active
Links
Images
Landscapes
- Processing Of Solid Wastes (AREA)
Abstract
The utility model relates to the technical field of hot blast stove equipment, in particular to the technical field of hot blast stove waste gas treatment equipment, and particularly provides a mutual pressurizing system for the furnace changing waste gas of a hot blast stove. The hot blast furnace changing waste gas mutual pressurizing system comprises a plurality of hot blast furnaces, inlets of all the hot blast furnaces are connected with cold air pipelines, outlets of all the hot blast furnaces are provided with waste gas branch pipes, and waste gas branch pipe valves are arranged on the waste gas branch pipes; all the waste gas branch pipes are connected with a waste gas main pipe and form a certain angle with the waste gas main pipe, and two ends of the waste gas main pipe are connected with the waste gas branch pipes; the waste gas main pipe is connected with a waste gas pressurizing pipeline in parallel, and a pressurizing fan is arranged on the waste gas pressurizing pipeline. The problems that in the prior art, when the furnace is changed by combustion, air supply and conversion, the cold air equalizing pipe can utilize cold air in a cold air pipeline to pressurize the furnace, air supply pressure fluctuation can be caused, the pressurizing process is slow, and heat of high-temperature waste gas is wasted are solved.
Description
Technical Field
The utility model relates to the technical field of hot blast stove equipment, in particular to the technical field of hot blast stove waste gas treatment equipment, and particularly provides a mutual pressurizing system for the furnace changing waste gas of a hot blast stove.
Background
The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art.
The hot blast stove is an important facility for continuously providing hot air for the blast furnace in the blast furnace ironmaking process, and one blast furnace is usually provided with three or four hot blast stoves; in particular, a large-scale blast furnace hot blast stove system is generally provided with four hot blast stoves and adopts a cross parallel operation mode of two-burning and two-feeding. The four hot blast stoves are staggered evenly according to the operation cycle, one of the four hot blast stoves finishes the air supply by turning, and the other air supply finishes the combustion by turning, so that the air supply of the two hot blast stoves and the combustion of the two hot blast stoves are always kept. The single-seat hot blast stove can go through four processes of a combustion period, a combustion-to-air supply period, an air supply period and an air supply-to-combustion process, wherein the combustion period is that blast furnace gas and combustion-supporting air are mixed and combusted, a heat accumulator is heated, then smoke is discharged through a smoke pipeline, and the air supply period is that high-pressure cold air flows into the heat accumulator from the bottom of the stove, is fully heated and then flows out from a hot air pipeline. Because the pressure difference is larger in the combustion and air supply periods, pressure equalization is carried out before the combustion and air supply conversion so as to avoid the damage of a furnace body and a valve caused by overlarge pressure difference fluctuation.
However, the inventor finds that in the operation of a hot blast stove system, a cold air equalizing pipe can utilize cold air in a cold air pipeline to pressurize the stove when burning, transferring air and changing the stove, which can cause air supply pressure fluctuation and slow pressurizing process; when the air supply is rotated to burn, high-pressure and high-temperature waste gas in the furnace is directly discharged to a chimney through a waste gas pipeline, so that energy waste, environmental pollution and the like can be brought.
SUMMERY OF THE UTILITY MODEL
The furnace pressure equalizing device aims at solving the problems that in the prior art, when the furnace is changed by combustion, air supply and conversion, a cold air equalizing pipe can utilize cold air in a cold air pipeline to pressurize the furnace, air supply pressure fluctuation can be caused, the pressurizing process is slow, and heat of high-temperature waste gas is wasted.
In one or more embodiments of the utility model, a mutual pressurization system for the waste gas of hot blast stove changing is provided, which comprises a plurality of hot blast stoves, wherein inlets of all the hot blast stoves are connected with a cold air pipeline,
the outlets of all the hot blast stoves are provided with a waste gas branch pipe, and a waste gas branch pipe valve is arranged on the waste gas branch pipe;
all the waste gas branch pipes are connected with a waste gas main pipe and form a certain angle with the waste gas main pipe, and two ends of the waste gas main pipe are connected with the waste gas branch pipes;
the waste gas main pipe is connected with a waste gas pressurizing pipeline in parallel, and a pressurizing fan is arranged on the waste gas pressurizing pipeline.
One or some of the above technical solutions have the following advantages or beneficial effects:
1) the utility model cancels a cold air pressure equalizing pipe and a cold air pressure equalizing valve in the original system, can realize the pressure charging of the hot blast stove for converting combustion into air supply by completely utilizing the waste gas of converting air supply into combustion through the waste gas pressure equalizing valve and the waste gas pressure charging pipeline, and avoids the system air supply pressure fluctuation caused by the pressure charging of the hot blast stove by the cold air in the extraction system. Meanwhile, the waste gas generated in the furnace replacement is fully utilized, so that the residual pressure and the residual temperature of the waste gas generated in the furnace replacement can be fully utilized, and the emission of pollutants in the waste gas can be reduced.
2) The utility model has small change to the waste gas pressurizing system of the original hot blast stove, and can be realized only by installing the waste gas main pipe, the waste gas branch pipe and the waste gas pressurizing pipeline, therefore, the proposal of the utility model has small change to the existing proposal, is easy to realize, and can meet the industrial application.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model.
FIG. 1 is a schematic view of a system for mutually pressurizing waste gas during the furnace exchange of a hot blast stove in an embodiment.
Wherein: 1. a pressure sensor; 2. a hot blast stove body; 3. a chimney; 4. a flue gas valve; 5. a cold air valve; 6. an exhaust manifold valve; 7. a waste gas pressure equalizing valve; 8. an exhaust gas charging valve; 9. a pressurizing fan; 10. an exhaust gas pressurizing pipeline; 11. a flue gas duct; 12. a cold air duct; 13. an exhaust gas main pipe; 14. a flue gas branch pipe; 15. a cold air branch pipe; 16. an exhaust manifold.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
The furnace pressure equalizing device aims at solving the problems that in the prior art, when the furnace is changed by combustion, air supply and conversion, a cold air equalizing pipe can utilize cold air in a cold air pipeline to pressurize the furnace, air supply pressure fluctuation can be caused, the pressurizing process is slow, and heat of high-temperature waste gas is wasted.
In one or more embodiments of the utility model, a mutual pressurization system for the waste gas of hot blast stove furnace changing is provided, which comprises a plurality of hot blast stoves 2, wherein the inlets of all the hot blast stoves 2 are connected with a cold air pipeline 12,
the outlets of all the hot blast stoves 2 are provided with a waste gas branch pipe 16, and the waste gas branch pipe 16 is provided with a waste gas branch pipe valve 6;
all the waste gas branch pipes 16 are connected with a waste gas main pipe 13 and form a certain angle with the waste gas main pipe 13, and two ends of the waste gas main pipe 13 are connected with the waste gas branch pipes 16;
the waste gas main pipe 13 is connected with a waste gas pressurizing pipeline 10 in parallel, and a pressurizing fan 9 is arranged on the waste gas pressurizing pipeline 10.
The utility model cancels a cold air pressure equalizing pipe and a cold air pressure equalizing valve in the original system, can realize the pressure charging of the hot blast stove for converting combustion into air supply by completely utilizing the waste gas of converting air supply into combustion through the waste gas pressure equalizing valve and the waste gas pressure charging pipeline, and avoids the system air supply pressure fluctuation caused by the pressure charging of the hot blast stove by the cold air in the extraction system. Meanwhile, the waste gas generated in the furnace replacement is fully utilized, so that the residual pressure and the residual temperature of the waste gas generated in the furnace replacement can be fully utilized, and the emission of pollutants in the waste gas can be reduced.
In the mutual pressurizing system of hot-blast furnace changing waste gas, the waste gas of each branch road is collected to the waste gas main pipe 13, and realize pressurizing fast through parallelly connected waste gas pressurizing pipeline 10, avoid needing cold air pipeline 12 to further provide cold wind at the in-process that pressurizes, arouse the air supply pressure fluctuation.
Preferably, the system also comprises a chimney 3, the outlets of all the hot blast stoves 2 are provided with flue gas branch pipes 14, all the flue gas branch pipes 14 are collected into a flue gas pipeline 11, and the flue gas pipeline 11 is connected with the chimney 3. Namely, the flue gas in the hot blast stove 2 enters the flue gas pipeline 11 through the flue gas branch pipe 14 and finally enters the chimney 3.
Preferably, a flue gas valve 4 is arranged on the flue gas branch pipe 14. The flue gas valve 4 is adjusted, thereby adjusting the amount of flue gas outlet.
Preferably, an exhaust gas pressurizing valve 8 is further arranged on the exhaust gas pressurizing pipeline 10.
Preferably, the exhaust gas equalizing valve 7 is arranged on the parallel section of the exhaust gas main pipe 13 and the exhaust gas pressurizing pipeline 10.
Preferably, the cold air duct 12 is divided into a plurality of cold air branch pipes 15, and each cold air branch pipe 15 corresponds to an inlet of the hot blast stove 2.
Preferably, the cold air branch pipe 15 is provided with a cold air valve 5.
Preferably, a pressure sensor 1 is installed in the hot blast stove 2. The pressure sensor can detect the pressure in the hot blast stove at any time, and correspondingly adjusts the waste gas pressurizing pipeline 10, the waste gas main pipe 3 and the waste gas branch pipe 16.
Preferably, the number of the hot blast stoves 2 is double. Because the hot blast stove 2 needs to be adjusted by air supply, combustion and the like, and can be completed by at least matching a pair of hot blast stoves 2, the number of the hot blast stoves 2 is double.
Preferably, the waste gas branch pipe 16 is detachably connected with the hot blast stove 2. The pipeline is convenient to replace and maintain regularly.
In one or some embodiments of the utility model, a hot blast stove changing waste gas mutual pressurizing method is provided, which is carried out in the hot blast stove changing waste gas mutual pressurizing system, and comprises the following steps:
the hot blast stove system adopts a two-burning two-feeding cross parallel operation mode, four hot blast stoves are uniformly staggered according to an operation period, two air supplies and two combustion are always kept, and the short stove changing time is provided in the combustion and air supply conversion process. Specifically, taking an operation cycle as an example: in 0-1/4 period, No. 1 and No. 2 air supply, No. 3 and No. 4 combustion; 1/4-2/4 cycles: no. 2 and No. 3 air supply, and No. 4 and No. 1 combustion; 2/4-3/4 cycles: no. 3 and No. 4 air supply, and No. 1 and No. 2 combustion; 3/4-4/4 cycles: no. 4 and No. 1 air supply, and No. 2 and No. 3 combustion.
Taking the above operation sequence as an example, at the point 1/4, the hot-blast stove 1 is changed from air supply to combustion, the hot-blast stove 3 is changed from combustion to air supply, the valves of the hot-blast stoves 1 and 3 are both in a closed state, the waste gas branch pipe valve 6 and the waste gas pressure equalizing valve 7 of the hot-blast stoves 1 and 3 are opened first, at this time, the high-temperature waste gas in the hot-blast stove 1 flows into the hot-blast stove 3 through the waste gas main pipe 13 and the waste gas pressure equalizing valve 7 under the action of pressure difference, the waste gas pressure equalizing valve 7 is closed after the pressure sensors 1 in the stoves 1 and 3 detect pressure balance, then the corresponding waste gas pressure equalizing valve 8 is opened and the pressure-charging fan 9 is started, at this time, the waste gas in the hot-blast stove 1 continues to charge the hot-blast stove 3 through the waste gas pressure-charging pipeline 10 under the action of the pressure-charging fan 9, when the pressure sensor 1 in the stove detects that the hot-blast stove 3 meets the air pressure condition of air supply, the pressure of the pressure sensor 9 is closed, A waste gas pressure charging valve 8 and a corresponding hot blast stove waste gas branch valve 6. At the time point of 2/4, the No. 2 hot blast stove is changed into combustion from air supply, and the No. 4 hot blast stove is changed into air supply from combustion; at the time point of 3/4, the No. 3 hot blast stove is changed into combustion from air supply, and the No. 1 hot blast stove is changed into air supply from combustion; at the time point of 4/4, the No. 4 hot blast stove is changed into combustion from air supply, and the No. 2 hot blast stove is changed into air supply from combustion; the pressure equalizing and pressurizing operations are carried out in the furnace changing process according to the mode.
The embodiment can realize the purpose of completely utilizing the waste gas of changing the blast furnace from blast supply to combustion to pressurize the hot blast furnace from combustion to blast supply, and avoids the pressure fluctuation of system blast air caused by the pressurization of the hot blast furnace by cold air in the extraction system. Meanwhile, high-temperature and high-pressure furnace-changing waste gas is fully utilized, so that the efficiency of a hot blast stove system can be improved, and the emission of pollutants in the waste gas can be reduced.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, therefore, the present invention is not limited by the appended claims.
Claims (10)
1. A mutual pressurizing system for the waste gas generated by changing the hot blast stoves is characterized by comprising a plurality of hot blast stoves (2), wherein the inlets of all the hot blast stoves (2) are connected with a cold air pipeline (12),
the outlets of all the hot blast stoves (2) are provided with a waste gas branch pipe (16), and a waste gas branch pipe valve (6) is arranged on the waste gas branch pipe (16);
all the waste gas branch pipes (16) are connected with a waste gas main pipe (13) and form a certain angle with the waste gas main pipe (13), and both ends of the waste gas main pipe (13) are connected with the waste gas branch pipes (16);
the waste gas main pipe (13) is connected with a waste gas pressurizing pipeline (10) in parallel, and a pressurizing fan (9) is arranged on the waste gas pressurizing pipeline (10).
2. The hot blast stove furnace change waste gas mutual pressurizing system according to claim 1, further comprising a chimney (3), wherein the outlets of all the hot blast stoves (2) are provided with flue gas branch pipes (14), all the flue gas branch pipes (14) are collected into a flue gas pipeline (11), and the flue gas pipeline (11) is connected with the chimney (3).
3. The hot blast stove flue gas exchange and pressurization system according to claim 2, characterized in that the flue gas branch pipe (14) is provided with a flue gas valve (4).
4. The hot blast stove furnace change waste gas mutual pressurisation system according to claim 1, characterised in that a waste gas charging valve (8) is further provided on the waste gas charging duct (10).
5. The hot blast stove furnace-changing waste gas mutual pressurizing system according to claim 1, characterized in that a waste gas pressure equalizing valve (7) is arranged on the parallel section of the waste gas main pipe (13) and the waste gas pressurizing pipeline (10).
6. The hot blast stove waste gas exchange and pressurization system according to claim 1, characterized in that the cold air duct (12) is divided into a plurality of cold air branch pipes (15), and each cold air branch pipe (15) corresponds to an inlet of the hot blast stove (2).
7. The hot blast stove waste gas exchange and pressurization system according to claim 6, characterized in that the cold blast branch pipe (15) is provided with a cold blast valve (5).
8. The hot blast stove waste gas mutually charging system according to claim 1, characterized in that a pressure sensor (1) is installed in the hot blast stove (2).
9. The hot blast stove waste gas exchange and pressurization system according to claim 1, characterized in that the number of said hot blast stoves (2) is double.
10. The hot blast stove change exhaust gas mutual pressurisation system according to claim 1, characterised in that the exhaust gas branch (16) is detachable from the hot blast stove (2) interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122034423.3U CN216337762U (en) | 2021-08-26 | 2021-08-26 | Hot-blast furnace trades stove waste gas mutual pressurizing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122034423.3U CN216337762U (en) | 2021-08-26 | 2021-08-26 | Hot-blast furnace trades stove waste gas mutual pressurizing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216337762U true CN216337762U (en) | 2022-04-19 |
Family
ID=81168521
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122034423.3U Active CN216337762U (en) | 2021-08-26 | 2021-08-26 | Hot-blast furnace trades stove waste gas mutual pressurizing system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216337762U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114959146A (en) * | 2022-07-13 | 2022-08-30 | 中冶京诚工程技术有限公司 | Hot-blast stove charging and discharging system and control method thereof |
| CN115029492A (en) * | 2022-07-13 | 2022-09-09 | 中冶京诚工程技术有限公司 | Hot blast stove charging and discharging system and its control method |
| CN115094179A (en) * | 2022-07-13 | 2022-09-23 | 中冶京诚工程技术有限公司 | Hot blast stove furnace change waste gas recycling system and method |
| CN115109884A (en) * | 2022-07-13 | 2022-09-27 | 中冶京诚工程技术有限公司 | Hot blast stove exchanging system and exchanging method |
| CN115181827A (en) * | 2022-07-13 | 2022-10-14 | 中冶京诚工程技术有限公司 | Hot blast stove charging and discharging pressure system and charging and discharging pressure control method |
| CN115838843A (en) * | 2023-02-20 | 2023-03-24 | 山西建龙实业有限公司 | Device and method for recovering residual hot air of hot blast stove |
| CN116254380A (en) * | 2023-03-17 | 2023-06-13 | 晟元先锋(成都)环保科技有限责任公司 | Pressurizing method of self-heating pressure-equalizing hot blast stove device |
| CN116334334A (en) * | 2023-03-28 | 2023-06-27 | 北京首钢股份有限公司 | Internal combustion type hot-blast stove pipeline system |
-
2021
- 2021-08-26 CN CN202122034423.3U patent/CN216337762U/en active Active
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114959146A (en) * | 2022-07-13 | 2022-08-30 | 中冶京诚工程技术有限公司 | Hot-blast stove charging and discharging system and control method thereof |
| CN115029492A (en) * | 2022-07-13 | 2022-09-09 | 中冶京诚工程技术有限公司 | Hot blast stove charging and discharging system and its control method |
| CN115094179A (en) * | 2022-07-13 | 2022-09-23 | 中冶京诚工程技术有限公司 | Hot blast stove furnace change waste gas recycling system and method |
| CN115109884A (en) * | 2022-07-13 | 2022-09-27 | 中冶京诚工程技术有限公司 | Hot blast stove exchanging system and exchanging method |
| CN115181827A (en) * | 2022-07-13 | 2022-10-14 | 中冶京诚工程技术有限公司 | Hot blast stove charging and discharging pressure system and charging and discharging pressure control method |
| CN115029492B (en) * | 2022-07-13 | 2023-10-27 | 中冶京诚工程技术有限公司 | Hot-blast stove pressure charging and discharging system and control method thereof |
| CN114959146B (en) * | 2022-07-13 | 2023-11-10 | 中冶京诚工程技术有限公司 | Hot-blast stove pressure charging and discharging system and control method thereof |
| CN115094179B (en) * | 2022-07-13 | 2023-11-14 | 中冶京诚工程技术有限公司 | A system and method for recycling waste gas from hot blast stove replacement |
| CN115181827B (en) * | 2022-07-13 | 2024-02-27 | 中冶京诚工程技术有限公司 | Hot-blast stove charging and discharging pressure system and charging and discharging pressure control method |
| CN115838843A (en) * | 2023-02-20 | 2023-03-24 | 山西建龙实业有限公司 | Device and method for recovering residual hot air of hot blast stove |
| CN116254380A (en) * | 2023-03-17 | 2023-06-13 | 晟元先锋(成都)环保科技有限责任公司 | Pressurizing method of self-heating pressure-equalizing hot blast stove device |
| CN116334334A (en) * | 2023-03-28 | 2023-06-27 | 北京首钢股份有限公司 | Internal combustion type hot-blast stove pipeline system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN216337762U (en) | Hot-blast furnace trades stove waste gas mutual pressurizing system | |
| CN101829649A (en) | Drying oven for spraying | |
| CN202066197U (en) | Heat accumulating type heating furnace capable of heating methane gas | |
| CN115094179B (en) | A system and method for recycling waste gas from hot blast stove replacement | |
| CN106967861B (en) | Time-sharing preheating system for combustion air of hot blast stove | |
| CN111020092A (en) | Pressure-equalizing energy recovery system for blast furnace hot blast stove and use method thereof | |
| CN102994677A (en) | System and method for power generation utilizing waste heat of tail waste gas of blast-furnace hot blast stove | |
| CN202993536U (en) | Coal-fired hot blast furnace set with waste heat boiler | |
| CN102563858A (en) | Complementary combustion device for low temperature waste heat power generation | |
| CN107227382A (en) | Hot blast stove system of blast furnace | |
| CN207002775U (en) | Hot blast stove system of blast furnace | |
| CN217628470U (en) | Hot-blast furnace system of changing | |
| CN1301335C (en) | High-air temp hot-blast stove for blast furnace | |
| CN217628466U (en) | Hot-blast furnace pressure charging and discharging system | |
| CN202730150U (en) | Power generation system utilizing waste heat of waste gas at tail of blast furnace hot blast stove | |
| CN1172008C (en) | Equipment and method for preheating gas and combustion-promoting air of blast furnace | |
| CN217578962U (en) | Hot-blast furnace waste gas semi-recycling device | |
| CN202470782U (en) | Secondary smoke residual heat utilization system for hot blast stove | |
| CN216049231U (en) | Low-temperature waste heat utilization coal-saving power generation device for cement plant | |
| CN202083238U (en) | A New Type of Combustion Air Preheating System for Galvanizing Furnace | |
| CN214536287U (en) | A primary air heating system for a waste incineration power station | |
| CN114959146A (en) | Hot-blast stove charging and discharging system and control method thereof | |
| CN209857084U (en) | Paint drying waste gas burns device | |
| CN206736291U (en) | Time-sharing preheating system for combustion air of hot blast stove | |
| CN210215414U (en) | A blast furnace pulverized coal and hot blast stove air/gas series preheating system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |