CN111850200A - Environment-friendly blowing-down method for blast furnace - Google Patents
Environment-friendly blowing-down method for blast furnace Download PDFInfo
- Publication number
- CN111850200A CN111850200A CN202010741069.5A CN202010741069A CN111850200A CN 111850200 A CN111850200 A CN 111850200A CN 202010741069 A CN202010741069 A CN 202010741069A CN 111850200 A CN111850200 A CN 111850200A
- Authority
- CN
- China
- Prior art keywords
- blast furnace
- environment
- cyclone dust
- connecting pipe
- blowing
- 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
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/22—Dust arresters
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Cyclones (AREA)
Abstract
The invention discloses an environment-friendly blowing-down and blowing-in method for a blast furnace, relates to the technical field of environment-friendly process of the blast furnace in the ferrous metallurgy industry, and aims to solve the problems that the difficulty of adding a gas purifying device for the blast furnace is high, and the environment and the health of residents can be influenced when the gas is not purified; the method comprises the following steps of S1: a connecting pipe is additionally arranged, one end of the connecting pipe is communicated with a rising pipe of a blast furnace gas furnace body, the other end of the connecting pipe is communicated with an air inlet of a cyclone dust collector, and a valve is arranged on the connecting pipe; step S2, dust removal: when the blast furnace is stopped and air is supplied, the valve and the cyclone dust collector are opened, and the coal gas enters the cyclone dust collector from the connecting pipe for dust removal and then is discharged and emptied; the invention has the advantages of no need of adding new equipment, simple process, less investment and good dust removal effect, realizes the environmental protection blowing-down and blowing-down of the blast furnace in the regular check, avoids the phenomenon of directly emptying a large amount of dense smoke in the blowing-down and blowing-down process, reduces the dense smoke emission pollution of the working procedure, and meets the new requirements of residents around the iron and steel enterprises for good life.
Description
Technical Field
The invention relates to the technical field of blast furnace environment-friendly processes in the ferrous metallurgy industry, in particular to an environment-friendly blowing-down and blowing-in method for a blast furnace.
Background
The blast furnace is continuous production type high-temperature and high-pressure smelting equipment, the operation cost is extremely high after the blast furnace is shut down, so that the operation and maintenance of the blast furnace equipment are realized by 3-5 times of regular maintenance every year, about 24 hours of damping down every time, troubleshooting and replacement of loss parts are carried out, the damping down and air supply processes of the blast furnace are regularly checked every time, and the process requirements are that black waste gas with fire light is directly discharged through a large diffusing device at the top of the blast furnace; blast furnaces generally belong to the highest building in iron and steel enterprises, a large number of supporting enterprises, schools, hospitals, communities and businesses are distributed around the iron and steel enterprises, residents around the old-fashioned iron and steel enterprises are usually not lower than one hundred thousand, even if the residents around the novel iron and steel enterprises are also tens of thousands, along with the improvement of the living standard of people, the environmental awareness is enhanced, and the number of environmental complaints is increased day by day.
At present, a direct-exhaust gas purification scheme for blast furnace damping and air supply processes does not exist, and the following two reasons mainly exist: the regular inspection is carried out 3-5 times per year, the amount of the coal gas discharged directly is limited each time, the influence on the air quality of residents around the iron and steel enterprise is limited, and the influence on the health of the residents is small; the height of the furnace top is over 60m generally, the space of the platform of the furnace top is compact, and the difficulty of adding new gas purification equipment is high.
In view of the above reasons, the initiative of blast furnace blowing-down gas purification equipment forced by governments, research institutes and iron and steel enterprises is not enough, but the direct-discharge gas of blast furnace regular check blowing-down still affects the environment and the health of residents to some extent, so that an environment-friendly blowing-down method for blast furnaces is urgently needed to solve the problem.
Disclosure of Invention
The invention aims to provide an environment-friendly blowing-down method for a blast furnace, which aims to solve the problems that a blast furnace is additionally provided with a gas purifying device which is difficult to add, but the environment and the health of residents are influenced when the gas is not purified.
In order to achieve the purpose, the invention provides the following technical scheme: an environment-friendly blowing-down method for a blast furnace comprises the following specific steps:
step S1, reconstruction: a connecting pipe is additionally arranged, one end of the connecting pipe is communicated with a rising pipe of a blast furnace gas furnace body, the other end of the connecting pipe is communicated with an air inlet of a cyclone dust collector, and a valve is arranged on the connecting pipe;
step S2, dust removal: when the blast furnace is stopped and air is supplied, the valve and the cyclone dust collector are opened, and the coal gas enters the cyclone dust collector from the connecting pipe for dust removal and then is discharged and emptied.
Preferably, the valve member comprises a manual valve and an electric valve, wherein the electric valve is closer to the air inlet of the cyclone dust collector than the manual valve.
Preferably, in step S2, the valve elements are opened in sequence from the manual valve to the electric valve.
Preferably, the number of the cyclone dust collectors is two, the number of the ascending pipes is four, two of the ascending pipes are communicated with one cyclone dust collector, and the other two of the ascending pipes are communicated with the other cyclone dust collector.
Preferably, in step S1, the connection pipe is connected to the uptake shaft of the blast furnace gas body at the manhole on the uptake shaft.
Preferably, the outer wall of the joint of the air inlet of the cyclone dust collector and the vertical cylinder is thickened.
Preferably, a reinforcing rib is fixedly arranged at the interface of the air inlet of the cyclone dust collector and the vertical cylinder.
Compared with the prior art, the invention has the beneficial effects that:
1. the environment-friendly blowing-down method for the blast furnace realizes environment-friendly blowing-down of the blast furnace through regular inspection, avoids the phenomenon that a large amount of dense smoke is directly emptied in the blowing-down process, reduces the emission pollution of the dense smoke in the process, and particularly meets the new requirements of residents around iron and steel enterprises on good life.
2. The environment-friendly blowing-down method of the blast furnace does not need to add new equipment, achieves the purpose of environment-friendly blowing-down through improving the existing dust removal equipment, and has the advantages of simple process, less investment and good dust removal effect.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic front view of the cyclone dust collector;
FIG. 3 is a schematic top view of the cyclone dust collector;
FIG. 4 is a flow field profile of a cyclone;
FIG. 5 is a pressure field profile of a cyclone.
In the figure: 1. a riser pipe; 2. a connecting pipe; 3. a manual valve; 4. an electrically operated valve; 5. a cyclone dust collector; 51. and (4) an interface.
Detailed Description
When the blast furnace is stopped and blown, the process requirement is to directly discharge black waste gas with fire light through the large-diffusing device on the top of the blast furnace, the inventor often meets the alarm complaint of residents in the actual work, which brings great trouble to the normal production work of iron and steel enterprises, however, the new purifying equipment additionally arranged on the top of the blast furnace not only influences the safe production, is more complex to maintain, but also improves the production cost, so the problem can not be well solved all the time, therefore, the inventor proposes an idea to guide the blowing-down coal gas to pass through the original dust removal device so as to solve the problem.
Referring to fig. 1 to 3, an environment-friendly blowing-down method for a blast furnace includes the following steps:
step S1, reconstruction: the method is characterized in that a connecting pipe 2 is additionally arranged, one end of the connecting pipe is communicated with a rising pipe 1 of a blast furnace gas furnace body and is preferably connected to an inspection manhole, the other end of the connecting pipe is communicated with an air inlet of a cyclone dust collector 5, a valve is arranged on the connecting pipe 2 and can comprise a manual valve 3 and an electric valve 4, so that the improvement is that only the connecting pipe 2 with the valve is added on the basis of the original dust collecting equipment, the process is simple and low in cost, and the cyclone dust collector 5 does not work when the blast furnace is stopped and blown originally, and the utilization rate of the equipment can;
step S2, dust removal: when the blast furnace is stopped and the air is supplied, the valve piece and the cyclone dust collector 5 are opened, the coal gas enters the cyclone dust collector 5 from the connecting pipe 2 for dust removal and then is discharged, the dust removal effect is obvious, the environmental influence caused by direct discharge of black dense smoke is avoided, the damage to the health of peripheral residents is reduced, and meanwhile, the environmental protection complaints can be effectively reduced.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
The inventor takes the dust removing equipment of the company as an example, and makes the following accounting:
a damping-down link: when the coal gas needs to be diffused in the damping-down process, the volume of the throat empty area of the furnace top is generally 3 times of the geometric volume of the charging bucket by calculating that the convolution area is fully filled with cokeNamely: vDead zone≈3VCharging bucket。
Pressure aspect: the actual pressure of the top of the furnace is about 20kpa when the damping down gas is diffused, and is less than about 220kpa when the pressure-equalizing gas of the top charging bucket is diffused;
temperature aspect: the actual temperature of the furnace top dead zone is close to the temperature of the pressure discharge in the weighing charging bucket when the coal gas is diffused, the difference between the actual temperature and the pressure discharge temperature can be ignored, and the difference is generally 250 ℃.
In the actual engineering VCharging bucket＝47m3，VDead zone＝143m3The air release time is calculated by trial, the air release time in the charging bucket at the top of the furnace is 4.39s through the air release calculation of a gas system, the air release time of the gas in the empty area at the top of the furnace through a cyclone dust collector is 4.52s, and the air release time is close, thereby proving that the single cyclone dust collector meets the capability of processing the air quantity of the air released by damping down.
And substituting the operation parameters of the air supply link of the actual engineering into the air bleeding calculation to obtain the air bleeding time of the cyclone dust collector for purifying the maximum straight gas discharging amount of coal which is not more than 4.6 s.
To sum up, theoretical calculation shows that the pressure discharge capacity of the blast furnace charging bucket is enough to process the direct gas discharge amount when the blast furnace stops supplying air, the gas discharge time is close to that, and theoretically, the gas purification capacity is the same, so that the method is feasible, and the specific embodiment is as follows:
as shown in fig. 1, the dust removing equipment is originally provided with 4 ascending pipes 1, each ascending pipe 1 is provided with an inspection manhole, the aperture of each ascending pipe is 600mm, and the reconstruction and connection from the inspection manhole are simple and convenient; the dust removing equipment is also provided with two cyclone dust collectors 5, and two ascending pipes 1 are connected to an air inlet of the cyclone dust collector 5 from an inspection manhole through steel pipes with the diameter of 377 mm; the other two ascending pipes 1 are connected to the air inlet of the other cyclone dust collector 5 from the position of the inspection hole through another steel pipe with the diameter of 377 mm; the two steel pipes (namely the connecting pipe 2) are provided with a manual valve 3 and an electric valve 4, wherein the electric valve 4 is closer to the air inlet of the cyclone dust collector 5 than the manual valve 3, and the manual valve 3 is preferably arranged at a position close to an inspector hole, so that the operation is convenient; when the blast furnace is stopped and blown, the manual valve 3 is firstly opened, then the electric valve 4 is opened, the cyclone dust collectors 5 are opened, the gas blown in by the regular check is dedusted by the two cyclone dust collectors 5 and then is emptied, and the purpose of environment-friendly blowing is achieved.
In addition, the inventor keenly perceives that in practical engineering application, the air discharge time is prolonged possibly due to an emergency in the air supply process of the regular check, so the invention needs to carry out pressure field and flow field model analysis through computer software; for example, ANSYS Fluent finite element analysis software is utilized to find a weak link with high working strength, as shown in fig. 4 and 5, it can be seen from the figure that the joint of the air inlet of the cyclone dust collector 5 and the vertical cylinder, particularly the joint 51, is subjected to high stress, and is easy to leak air or even crack and break; through thickening the outer wall steel sheet thickness of above-mentioned position department and the mode of addding the strengthening rib, 5 gas leakage that can prevent to cause because of emergency even ftractures cyclone, improve the reliability that cyclone 5 removed dust.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are also included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope defined by the claims.
The present invention is not described in detail, but is known to those skilled in the art.
Claims (7)
1. An environment-friendly blowing-down method for a blast furnace is characterized by comprising the following specific steps:
step S1, reconstruction: a connecting pipe (2) is additionally arranged, one end of the connecting pipe is communicated with a rising pipe (1) of a blast furnace gas furnace body, the other end of the connecting pipe is communicated with an air inlet of a cyclone dust collector (5), and a valve is arranged on the connecting pipe (2);
step S2, dust removal: when the blast furnace is stopped and air is supplied, the valve element and the cyclone dust collector (5) are opened, and the coal gas enters the cyclone dust collector (5) from the connecting pipe (2) for dust removal and then is discharged and emptied.
2. The environment-friendly blowing-down method for the blast furnace as claimed in claim 1, wherein: the valve part comprises a manual valve (3) and an electric valve (4), wherein the electric valve (4) is closer to the air inlet of the cyclone dust collector (5) than the manual valve (3).
3. The blast furnace environment-friendly blowing-down method according to claim 2, characterized in that: in the step S2, the valve elements are opened in the sequence that the manual valve (3) is opened first and then the electric valve (4) is opened.
4. The blast furnace environment-friendly blowing-down method according to claim 2, characterized in that: the two cyclone dust collectors (5) are arranged, the four ascending pipes (1) are arranged, two of the four ascending pipes are communicated with one cyclone dust collector (5), and the other two ascending pipes are communicated with the other cyclone dust collector (5).
5. The environment-friendly blowing-down method for the blast furnace as claimed in claim 4, wherein: in the step S1, the communication position of the connecting pipe (2) and the ascending pipe (1) of the blast furnace gas furnace body is positioned at the position of the inspection hole on the ascending pipe (1).
6. The environment-friendly blowing-down method for the blast furnace as claimed in any one of claims 1 to 5, wherein: the outer wall of the joint of the air inlet of the cyclone dust collector (5) and the vertical cylinder is thickened.
7. The environment-friendly blowing-down method for the blast furnace as claimed in claim 6, wherein: and a reinforcing rib is fixedly arranged at a joint (51) of the air inlet of the cyclone dust collector (5) and the vertical cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010741069.5A CN111850200A (en) | 2020-07-29 | 2020-07-29 | Environment-friendly blowing-down method for blast furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010741069.5A CN111850200A (en) | 2020-07-29 | 2020-07-29 | Environment-friendly blowing-down method for blast furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111850200A true CN111850200A (en) | 2020-10-30 |
Family
ID=72948337
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010741069.5A Pending CN111850200A (en) | 2020-07-29 | 2020-07-29 | Environment-friendly blowing-down method for blast furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111850200A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55113814A (en) * | 1979-02-24 | 1980-09-02 | Ishikawajima Harima Heavy Ind Co Ltd | Operation method of blast furnace |
| US20140252696A1 (en) * | 2011-10-19 | 2014-09-11 | Paul Wurth Refractory & Engineering Gmbh | Method of operating regenerative heaters in blast furnace plant |
| CN204803335U (en) * | 2015-07-20 | 2015-11-25 | 包钢集团设计研究院（有限公司） | Top gas diffuses dust removal noise reduction system |
| CN206477005U (en) * | 2017-02-27 | 2017-09-08 | 江阴兴澄特种钢铁有限公司 | A kind of blast furnace stops multiple wind furnace top gas purification tapping equipment |
| CN207243917U (en) * | 2017-09-11 | 2018-04-17 | 中冶赛迪工程技术股份有限公司 | A kind of blast furnace gas diffusing dust-extraction unit |
| CN209602579U (en) * | 2018-12-27 | 2019-11-08 | 上海欧骋冶金成套设备有限公司 | A kind of blast furnace stops wind flue gas processing device again |
-
2020
- 2020-07-29 CN CN202010741069.5A patent/CN111850200A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55113814A (en) * | 1979-02-24 | 1980-09-02 | Ishikawajima Harima Heavy Ind Co Ltd | Operation method of blast furnace |
| US20140252696A1 (en) * | 2011-10-19 | 2014-09-11 | Paul Wurth Refractory & Engineering Gmbh | Method of operating regenerative heaters in blast furnace plant |
| CN204803335U (en) * | 2015-07-20 | 2015-11-25 | 包钢集团设计研究院（有限公司） | Top gas diffuses dust removal noise reduction system |
| CN206477005U (en) * | 2017-02-27 | 2017-09-08 | 江阴兴澄特种钢铁有限公司 | A kind of blast furnace stops multiple wind furnace top gas purification tapping equipment |
| CN207243917U (en) * | 2017-09-11 | 2018-04-17 | 中冶赛迪工程技术股份有限公司 | A kind of blast furnace gas diffusing dust-extraction unit |
| CN209602579U (en) * | 2018-12-27 | 2019-11-08 | 上海欧骋冶金成套设备有限公司 | A kind of blast furnace stops wind flue gas processing device again |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN209481707U (en) | A kind of blast furnace roof presses coal gas circulation and stress device | |
| CN111850200A (en) | Environment-friendly blowing-down method for blast furnace | |
| CN210140604U (en) | Recovery device for blast furnace damping-down and diffusing coal gas | |
| CN112143844A (en) | Blast furnace damping down diffusing gas purifying and recovering device | |
| CN207608569U (en) | A kind of online plugging device for replacing blast furnace bucket pressure equalizing blow off valve | |
| CN109708095B (en) | Make things convenient for dismouting formula low temperature economizer system | |
| CN215250664U (en) | Multifunctional integrated tower for blast furnace gas | |
| CN210765373U (en) | Intermediate bin device for gravity dust removal and ash discharge of blast furnace | |
| CN213232349U (en) | Blast furnace pressure-equalizing diffused gas recovery device | |
| CN211199258U (en) | Blast furnace top charging bucket pressure-equalizing coal gas full-recovery system | |
| CN206867884U (en) | A kind of new waste gas processing system | |
| CN211814525U (en) | Treatment device for diffused gas at top of blast furnace | |
| CN217180143U (en) | Online sampling device of blast furnace gas | |
| CN214991673U (en) | Pressure-equalizing and diffusing device for top of blast furnace and tank furnace | |
| CN220867454U (en) | Blast furnace top gas recovery device | |
| CN113528724B (en) | Lightweight blast furnace gas pipeline system | |
| CN220135489U (en) | Automatic ash disturbing device for ash bucket and ash valve of coal economizer | |
| CN219861421U (en) | Ash control device of gravity dust remover of blast furnace | |
| CN217052276U (en) | Movable blast furnace coal dust collector | |
| CN220246171U (en) | Vanadium titano-magnetite blast furnace and tank top gas full recovery device | |
| CN218910412U (en) | Blast furnace damping down and diffusing gas purifying and recycling system | |
| CN219244873U (en) | Disc device for measuring suction force of coke oven bridge pipe | |
| CN217638206U (en) | Gas taking device for blast furnace semi-clean gas pipeline | |
| CN210916125U (en) | Nitrogen pressure equalizing device at top of blast furnace | |
| CN218778364U (en) | Pneumatic conveying device for electric furnace dust removal ash |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201030 |
|
| RJ01 | Rejection of invention patent application after publication |