CN113005257A - Converter flue gas treatment system and operation method thereof - Google Patents
Converter flue gas treatment system and operation method thereof Download PDFInfo
- Publication number
- CN113005257A CN113005257A CN202110210218.XA CN202110210218A CN113005257A CN 113005257 A CN113005257 A CN 113005257A CN 202110210218 A CN202110210218 A CN 202110210218A CN 113005257 A CN113005257 A CN 113005257A
- Authority
- CN
- China
- Prior art keywords
- flue gas
- converter
- waste heat
- heat recovery
- recovery device
- 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.)
- Granted
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/38—Removal of waste gases or dust
- C21C5/40—Offtakes or separating apparatus for converter waste gases or dust
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The invention relates to a converter flue gas treatment system, which comprises a converter smoke hood, a vaporization cooling flue, a waste heat recovery device, a dust removal mechanism and a switching station which are sequentially connected through a flue gas pipeline, wherein a flue gas outlet of the switching station is respectively connected with a diffusion chimney and a gas tank, the flue gas pipeline between the vaporization cooling flue and the waste heat recovery device comprises a mixed flow pipe body, and a swirler which can enable flue gas to generate rotational flow is arranged in the mixed flow pipe body. In addition, the method also relates to an operation method of the converter flue gas treatment system. The cyclone is arranged in the pipeline in front of the waste heat recovery device, so that the contact collision probability of the coal gas components of the flue gas and oxygen can be increased, the oxygen contained in the flue gas and the oxygen remained in the pipeline can be quickly consumed, and the possibility of explosion caused by mixing with the oxygen when the temperature of the coal gas is reduced to be below the self-ignition point is remarkably reduced; and the cyclone effect of the flue gas is utilized, a certain flue gas dedusting effect can be achieved, and the situation that the waste heat recovery device is blocked by dust is reduced.
Description
Technical Field
The invention belongs to the technical field of converter steelmaking, and particularly relates to a converter flue gas treatment system and an operation method thereof.
Background
Converter steelmaking is the most predominant steelmaking mode at present, oxygen decarburization is one of the most predominant converter steelmaking processes, and in the oxygen decarburization process, a converter generates a large amount of flue gas, and the main components of the flue gas are CO (accounting for about 66 percent) and CO2(about 16%) and N2(about 17%) with a small amount of O2And Ar. Due to the large amount of CO contained in the converter flue gas, the converter flue gas is also called converter gas, and has the characteristics of flammability and explosiveness. The initial temperature of the converter gas is about 1600 ℃, the converter gas contains a large amount of dust generated by steel making, and the content of the dust is about 80-150 g/m3The main components of the dust are FeO, Fe, CaO, MnO and SiO2And C, etc.
At present, two methods are most common for treating converter flue gas. The first one is OG process, also called wet dedusting, which includes recovering afterheat of converter fume at 1600 deg.c via vaporizing cold area, spraying great amount of water to cool the fume to 900 deg.c, coarse dedusting and explosion prevention, and further fine dedusting with Venturi tube to recover high heat value and low oxygen content gas, ignite and exhaust low heat value or high oxygen content gas. The second method is dry dedusting, mainly including LT method and DDS method, and its main process is to make converter flue gas at about 1600 deg.C pass through vaporization cold zone flue to recover waste heat, spray water and cool when the temperature of flue gas is reduced to about 900 deg.C, then pass through electrostatic dust collector to make fine dedusting, then recover high-quality coal gas, ignite low-quality coal gas and exhaust. Compared with wet dust removal, the dry dust removal has better dust removal effect, less water spray and no need of sewage and sludge treatment, so in recent years, newly built converter systems mostly adopt dry dust removal systems, and a plurality of steel mills change the existing wet dust removal systems into the dry dust removal systems, and the dry dust removal systems become the most widely applied converter flue gas treatment systems at present.
However, dry dedusting of converter flue gas is not really full dry dedusting in nature, and after flue gas enters an evaporative cooler, a system sprays water according to air volume and air temperature so as to achieve the purposes of coarse dedusting and cooling. At the moment, the waste heat of the flue gas at about 900 ℃ is completely wasted under the condition of directly spraying water or cooling by water mist, and the flue gas cannot be recycled, so that the overall energy efficiency of the system is influenced. In addition, because the dust particles in the converter flue gas are small, the dust removal effect of the electrostatic dust remover is difficult to achieve the effect of ultralow emission.
Disclosure of Invention
The invention relates to a converter flue gas treatment system and an operation method thereof, which can at least solve part of defects in the prior art.
The invention relates to a converter flue gas treatment system, which comprises a converter flue gas hood, a vaporization cooling flue, a waste heat recovery device, a dust removal mechanism and a switching station which are sequentially connected through a flue gas pipeline, wherein a flue gas outlet of the switching station is respectively connected with a diffusion chimney and a gas tank, the flue gas pipeline between the vaporization cooling flue and the waste heat recovery device comprises a mixed flow pipe body, and a swirler which can enable flue gas to generate rotational flow is arranged in the mixed flow pipe body.
In one embodiment, the cyclone includes a flow guide tube and a first cyclone vane set disposed at an outlet end of the flow guide tube, the flow guide tube is fixed in the mixed flow tube through a mounting bracket, and a flue gas circulation annular cavity is defined between the flow guide tube and an inner wall of the mixed flow tube, and a second cyclone vane set is disposed at an outlet end of the flue gas circulation annular cavity.
As one embodiment, a powder spraying device for spraying carbon powder or coke powder into the flue gas circulation annular cavity is arranged on the mixed flow pipe body.
In one embodiment, the swirler is a ceramic component.
As one embodiment, the converter flue gas treatment system further comprises an evaporative cooler, and the evaporative cooler is arranged between the waste heat recovery device and the dust removal mechanism.
As one embodiment, the converter flue gas treatment system further comprises a bypass pipe, one end of the bypass pipe is connected to a flue gas pipeline between the vaporization cooling flue and the waste heat recovery device, the other end of the bypass pipe is connected to the evaporation cooler, a bypass valve is arranged on the bypass pipe, and a control valve is arranged on the flue gas pipeline between a connection point of the bypass pipe and the waste heat recovery device.
As an embodiment, an acoustic agglomeration device is arranged between the waste heat recovery device and the evaporative cooler.
In one embodiment, the dust removal mechanism comprises an electrostatic precipitator.
In one embodiment, the heat recovery device comprises a heat recovery boiler.
The invention also relates to an operation method of the converter flue gas treatment system, which comprises the following steps:
during the normal production period of the converter, converter smoke sucked by a converter smoke hood is sequentially treated by a vaporization cooling flue, a waste heat recovery device and a dust removal mechanism, whether a coal gas recovery condition is met is judged according to smoke components, when the coal gas recovery condition is met, the smoke enters a coal gas cabinet through a switching station, and when the coal gas recovery condition is not met, the smoke is discharged through a diffusing chimney through the switching station.
The invention has at least the following beneficial effects:
the converter flue gas treatment system provided by the invention is characterized in that a cyclone is arranged in a pipeline in front of a waste heat recovery device, so that the passing converter flue gas generates cyclone, the contact collision probability (especially based on the central negative pressure effect of the cyclone, the residual oxygen in an entrainment pipeline can be well induced) of the coal gas components of the flue gas and oxygen (including the oxygen in the flue gas and the residual oxygen in the pipeline) is increased, and because the converter coal gas with the temperature above the spontaneous combustion point (605 ℃) can rapidly generate oxidation reaction when contacting the oxygen, the explosion caused by the mixing of the coal gas and the oxygen is avoided, the arrangement of the cyclone can rapidly consume the oxygen contained in the flue gas and the residual oxygen in the pipeline, and obviously reduce the possibility of explosion caused by the mixing of the oxygen when the temperature of the coal gas is reduced below the spontaneous combustion point; and the cyclone effect of the flue gas is utilized, a certain flue gas dust removal effect can be achieved, the situation that the waste heat recovery device is blocked by dust is reduced, and the workload of a follow-up dust removal mechanism is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a converter flue gas treatment system according to an embodiment of the present invention;
fig. 2 is a schematic structural view of a mixed flow pipe provided in an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention are 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 given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 and 2, an embodiment of the present invention provides a converter flue gas treatment system, including a converter flue gas hood 2, an evaporation cooling flue 3, a waste heat recovery device 15, a dust removal mechanism 5, and a switching station 7, which are sequentially connected by a flue gas pipeline, a flue gas outlet of the switching station 7 is respectively connected to a diffusion chimney 9 and a gas chamber 8, the flue gas pipeline between the evaporation cooling flue 3 and the waste heat recovery device 15 includes a mixed flow pipe body 14, and a cyclone 14 capable of generating cyclone flow of flue gas is arranged in the mixed flow pipe body 14.
The converter smoke hood 2 is conventional equipment in the field, is covered on the converter 1 and is used for collecting smoke generated in the smelting process of the converter, a smoke outlet of the converter smoke hood 2 is connected with the evaporative cooling flue 3, and the collected smoke can enter the evaporative cooling flue 3. In the vaporization cooling flue 3, the temperature of the flue gas is reduced from about 1600 ℃ to about 900 ℃ through radiation heat exchange energy, and the recovery and utilization of the waste heat of the high-temperature section of the converter flue gas are realized.
In one embodiment, the waste heat recovery device 15 includes a waste heat boiler 15, and it is further preferable that a convection type waste heat boiler 15 is used, and in another embodiment, it is also possible to use a heat exchange device such as a convection type heat exchanger. The waste heat recovery device 15 is used for recovering the waste heat of the medium-temperature section of the converter flue gas, and preferably can reduce the temperature of the flue gas from about 900 ℃ to about 250 ℃; in this embodiment, the exhaust-heat boiler 15 is adopted, and the temperature of the outlet flue gas of the exhaust-heat boiler 15 is controlled within the range of 200 to 300 ℃. The waste heat boiler 15 is generally arranged vertically, and high-temperature flue gas enters from an upper opening and exits from a lower opening, so that waste heat absorption and dust discharge are facilitated; the waste heat boiler 15 can be divided into a high-temperature section, a medium-temperature section and a low-temperature section from top to bottom, can realize the cascade utilization of the flue gas waste heat of the converter, and achieves the purpose of economically and efficiently recovering the flue gas waste heat of the medium-temperature section; an ash discharge system is arranged below the outlet of the waste heat boiler 15 and used for discharging dust deposited in the waste heat boiler 15, and a valve and an air locking device are arranged on the ash discharge system to ensure that air cannot enter the boiler when ash is discharged; the waste heat boiler 15 is internally provided with an ash removal device which can regularly clean dust adhered to the heat exchange wall surface; the inside 4 ~ 8 explosion-proof valves that are provided with of exhaust-heat boiler 15 can play the effect of promptly letting out exploding when pressure is too big.
In the converter flue gas treatment system provided by this embodiment, the cyclone 14 is arranged in the pipeline before the waste heat recovery device 15, so that the passing converter flue gas generates a cyclone, the contact collision probability (especially, the residual oxygen in the pipeline can be well induced based on the central negative pressure effect of the cyclone) between the gas components of the flue gas and oxygen (including oxygen in the flue gas and the residual oxygen in the pipeline) is increased, and the converter gas with the temperature above the self-ignition point (605 ℃) can rapidly generate oxidation reaction when contacting with oxygen, and cannot cause explosion due to the mixing of the gas and the oxygen, so that the oxygen contained in the flue gas and the residual oxygen in the pipeline can be rapidly consumed due to the arrangement of the cyclone 14, and the possibility of explosion due to mixing with oxygen when the temperature of the gas is reduced below the self-ignition point is remarkably reduced; and the cyclone effect of the flue gas is utilized, a certain flue gas dedusting effect can be achieved, the situation that the waste heat recovery device 15 is blocked by dust is reduced, and the workload of the subsequent dedusting mechanism 5 is reduced.
The cyclone 14 is generally formed by arranging a plurality of cyclone vanes 141 in a ring shape, and the plate surfaces of the cyclone vanes 141 have an inclination angle with respect to the flow direction of the flue gas. Preferably, the swirler 14 is a ceramic component, which has good high temperature resistance and thus can operate stably and reliably for a long time. In one embodiment, the swirl vanes 141 are mounted directly on the inner wall of the mixing tube body 14. In another embodiment, the cyclone 14 includes a flow guide tube 141 and a first set of swirl vanes disposed at an outlet end of the flow guide tube 141, the flow guide tube 141 is fixed in the mixed flow tube 14 by a mounting bracket and encloses a flue gas circulation annular chamber with an inner wall of the mixed flow tube 14, and a second set of swirl vanes is disposed at an outlet end of the flue gas circulation annular chamber; based on this design, can form two strands of whirl flue gases in mixed flow body 14, can not only improve the consumption effect to remaining oxygen in the pipeline, can improve the mixed effect of converter flue gas self moreover, further improve the consumption effect to oxygen in the flue gas, the dust removal effect is also better.
In a further preferred scheme, a powder spraying device can be arranged on the mixed flow pipe body 14 and used for spraying carbon powder/coke powder into the flue gas circulation annular cavity, so that the oxygen consumption effect can be remarkably improved, particularly, the sprayed carbon powder/coke powder can be fully mixed with the flue gas based on the rotational flow effect of the second rotational flow blade group, and the oxygen removal effect is good. The powder spraying device can comprise a plurality of spray guns which are arranged circumferentially along the mixed flow pipe body 14.
Accordingly, an ash discharge port may be provided at the bottom of the outlet side pipe of the cyclone 14 to discharge the accumulated ash in the pipe at a proper time.
Further preferably, as shown in fig. 1, the converter flue gas treatment system further comprises an evaporative cooler 4, wherein the evaporative cooler 4 is arranged between the waste heat recovery device 15 and the dust removal mechanism 5. The evaporative cooler 4 can further cool the flue gas, so that the temperature of the flue gas can meet the condition requirements of the subsequent dust removal mechanism 5, for example, when the subsequent dust removal mechanism 5 adopts an electrostatic dust remover, the temperature of the flue gas can be reduced to 130-150 ℃ through the evaporative cooler 4; in addition, under normal operating mode, after the heat exchange of waste heat recovery device 15, high temperature flue gas has become low temperature flue gas, need not spout a large amount of water or water smoke and cool down in evaporative cooler 4, only need spout a small amount of water smoke to the flue gas quenching and tempering can, consequently can reduce the quantity of water and steam by a wide margin, reduce the energy consumption. When the subsequent dust removing mechanism 5 adopts the electrostatic dust remover, the dust removing effect of the electrostatic dust remover can be improved by conditioning the smoke dust.
The dust removing mechanism 5 is preferably a dry dust removing device, for example, the above-mentioned scheme using an electrostatic dust remover; in another embodiment, the dust removing mechanism 5 may also be a ceramic fiber filter, the ceramic fiber filter mainly includes a filter box and a ceramic fiber filter tube arranged in the filter box, the ceramic fiber filter tube is used as a core device, is mainly formed by pressing low-density porous ceramic fibers, can resist a temperature above 500 ℃, has good filtering performance, has a dust removing efficiency above 99%, and can reduce the smoke concentration to 10mg/m after the smoke is filtered by the ceramic fiber filter3The following. In order to achieve better dust removal and ash removal effects, the flue gas flows in from the lower part and flows out from the upper part of the ceramic fiber filter; an ash discharge system is arranged below the ceramic fiber filter and used for discharging dust filtered by the ceramic fiber filter, and a valve and an air locking device are arranged on the ash discharge system in order to prevent air from entering a system pipeline during ash discharge. In order to ensure the filtering effect of the ceramic fiber filter and avoid the excessive resistance loss of the filtering, the ceramic fiber filter is subjected to back flushing by a back flushing system at intervals according to the detection result of the filtering pressure, so that the dust adhered to the filtering surface falls into the dust discharging system below.
Further preferably, as shown in fig. 1, an acoustic agglomeration device 16 is arranged between the waste heat recovery device 15 and the evaporative cooler 4. The sound wave agglomerator 16 makes dust particles with different sizes generate vibration with different speeds and different frequencies to collide through the vibration of sound waves, and the collided dust is agglomerated together, so that the number of the dust is reduced, the particle size of the dust is increased, and the dust is easier to settle or be removed through a dust remover in the subsequent process; the acoustic agglomeration apparatus 16 is a conventional apparatus, and generally includes an acoustic wave generating device and an acoustic wave amplifying device, and the detailed structure thereof is not described herein. Obviously, the sonic agglomerator 16 described above may also be disposed between the evaporative cooler 4 and the dust removal means 5.
Further preferably, as shown in fig. 1, the converter flue gas treatment system further includes a bypass pipe, one end of the bypass pipe is connected to the flue gas pipeline between the evaporation cooling flue 3 and the waste heat recovery device 15, the other end of the bypass pipe is connected to the evaporation cooler 4, a bypass valve 11 is arranged on the bypass pipe, and a control valve is arranged on the flue gas pipeline between the bypass pipe and the waste heat recovery device 15. At the bypass joint, a three-way pipe 10 can be adopted to realize the connection between the main pipeline and the bypass pipe, and the three-way pipe 10 can adopt a water-cooling three-way pipe 10 or a heat-insulating three-way pipe 10 to ensure that the high-temperature flue gas can bear the high temperature of about 1000 ℃ for a long time and can bear the high temperature of the flue gas of more than 1200 ℃ for a short time. The three-way pipe 10 is generally arranged at a certain distance from the waste heat recovery device 15 and can be connected with the waste heat recovery device through a water-cooling pipeline or a heat-insulating pipeline; the bypass pipe is preferably a water-cooled pipe or a heat-insulated pipe. In one embodiment, the water-cooling pipeline comprises a metal pipeline and a ring of water-cooling pipes wound outside the metal pipeline; the heat insulation pipeline is made of high-temperature resistant metal materials, and heat insulation materials are sprayed on the inner wall of the pipeline.
The bypass valve 11 is preferably a high temperature resistant valve that can be automatically opened and closed, for example, a high temperature resistant butterfly valve; the bypass valve 11 can bear the high temperature of the flue gas about 1000 ℃ for a long time and can bear the high temperature of the flue gas above 1200 ℃ for a short time. In one embodiment, the control valve comprises a high-temperature butterfly valve 12 and a high-temperature blind plate valve 13, and is preferably an automatic control valve capable of automatically opening and closing; the valves can bear the high temperature of about 1000 ℃ for a long time and can bear the high temperature of over 1200 ℃ for a short time.
By arranging the by-pass pipe, the flue gas at the outlet of the evaporative cooling flue 3 can be switched between two flue gas flow directions, and when the waste heat recovery device 15 is abnormal or needs to be overhauled, the flue gas is treated by the by-pass pipe, the evaporative cooler 4 and the dust removal mechanism 5, so that the normal operation of the system is ensured, and the problems of production halt of the converter 1 and the like are avoided. In addition, the trend of the flue gas can be controlled according to the generation period of the flue gas, for example, in the initial stage of converter blowing, the temperature of the flue gas is relatively low, the dust content is relatively high, the part of the flue gas can be controlled to be processed by the bypass pipe-evaporative cooler 4-dust removal mechanism 5, the situation that the waste heat recovery device 15 is blocked can be effectively reduced, or the service time of the waste heat recovery device 15 is prolonged/the maintenance frequency of the waste heat recovery device 15 is reduced, and in the middle stage and the later stage of converter blowing, the generated flue gas is controlled to be processed by the waste heat recovery device 15-evaporative cooler 4-dust removal mechanism 5.
The system is suitable for the reconstruction of the existing converter flue gas treatment system, namely, on the basis of the structure of the existing vaporization cooling flue 3-evaporative cooler 4-dust removal mechanism 5, a three-way pipe 10 is arranged on the outlet side of the vaporization cooling flue 3, one end of the pipeline where the waste heat recovery device 15 is arranged is connected to the three-way pipe 10, and the other end of the pipeline is connected to the evaporative cooler 4. The transformation mode has convenient operation and low transformation cost, thereby having popularization value.
Further, as shown in fig. 1, a control valve is also disposed between the evaporative cooler 4 and the acoustic agglomeration device 16, and the control valve may include a blind valve 17 and a butterfly valve 18, so that when the flue gas flows through the bypass pipe, the flue gas in the evaporative cooler 4 is prevented from bouncing along the main pipe. Further, when the flue gas circulates through the bypass pipe, nitrogen can be introduced between the high-temperature butterfly valve 12 and the high-temperature blind plate valve 13 in front of the waste heat recovery device 15, nitrogen is introduced between the blind plate valve 17 and the butterfly valve 18 behind the acoustic agglomeration device 16, the introduced nitrogen can play a role in air sealing, high-temperature heat transfer can be blocked, and the waste heat recovery device 15 can be conveniently overhauled.
The embodiment of the invention also relates to an operation method of the converter flue gas treatment system, which comprises the following steps:
during the normal production period of the converter 1, converter smoke inhaled by a converter smoke hood 2 is sequentially treated by a vaporization cooling flue 3, a waste heat recovery device 15 and a dust removal mechanism 5 and then is sent to a switching station 7 by a fan 6, whether a coal gas recovery condition is met or not is judged according to smoke components, when the coal gas recovery condition is met, the smoke enters a gas chamber 8 through the switching station 7, and when the coal gas recovery condition is not met, the smoke is discharged through a diffusion chimney 9 through the switching station 7.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. The utility model provides a converter flue gas processing system, includes converter petticoat pipe, vaporization cooling flue, waste heat recovery device, dust removal mechanism and the switching station that connects gradually through flue gas pipeline, the exhanst gas outlet of switching station connects diffusion chimney and gas chamber respectively, its characterized in that: the flue gas pipeline between the vaporization cooling flue and the waste heat recovery device comprises a mixed flow pipe body, and a swirler which can enable flue gas to generate rotational flow is arranged in the mixed flow pipe body.
2. The converter flue gas treatment system of claim 1, wherein: the swirler includes the honeycomb duct and arranges in the first whirl blading of honeycomb duct exit end, the honeycomb duct is fixed in through the installing support in the mixed flow body and with enclose between the inner wall of mixed flow body and establish and be formed with flue gas circulation ring chamber, in the exit end of flue gas circulation ring chamber has arranged second whirl blading.
3. The converter flue gas treatment system of claim 2, wherein: and a powder spraying device for spraying carbon powder or coke powder into the flue gas circulation annular cavity is arranged on the mixed flow pipe body.
4. The converter flue gas treatment system of claim 1, wherein: the swirler is a ceramic device.
5. The converter flue gas treatment system of claim 1, wherein: still include evaporative cooler, evaporative cooler arranges in waste heat recovery device with between the dust removal mechanism.
6. The converter flue gas treatment system of claim 5, wherein: the waste heat recovery device is characterized by further comprising a bypass pipe, one end of the bypass pipe is connected to a flue gas pipeline between the vaporization cooling flue and the waste heat recovery device in a side-by-side mode, the other end of the bypass pipe is connected with the evaporation cooler, a bypass valve is arranged on the bypass pipe, and a control valve is arranged on the flue gas pipeline between the side-by-side connection point of the bypass pipe and the waste heat recovery device.
7. The converter flue gas treatment system of claim 5, wherein: and an acoustic agglomeration device is arranged between the waste heat recovery device and the evaporative cooler.
8. The converter flue gas treatment system of claim 1, wherein: the dust removal mechanism comprises an electrostatic dust collector.
9. The converter flue gas treatment system of claim 1, wherein: the waste heat recovery device comprises a waste heat boiler.
10. The method of operating a converter flue gas treatment system according to any one of claims 1 to 9, comprising:
during the normal production period of the converter, converter smoke sucked by a converter smoke hood is sequentially treated by a vaporization cooling flue, a waste heat recovery device and a dust removal mechanism, whether a coal gas recovery condition is met is judged according to smoke components, when the coal gas recovery condition is met, the smoke enters a coal gas cabinet through a switching station, and when the coal gas recovery condition is not met, the smoke is discharged through a diffusing chimney through the switching station.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110210218.XA CN113005257B (en) | 2021-02-25 | 2021-02-25 | Converter flue gas treatment system and operation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110210218.XA CN113005257B (en) | 2021-02-25 | 2021-02-25 | Converter flue gas treatment system and operation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113005257A true CN113005257A (en) | 2021-06-22 |
| CN113005257B CN113005257B (en) | 2023-09-15 |
Family
ID=76386384
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110210218.XA Active CN113005257B (en) | 2021-02-25 | 2021-02-25 | Converter flue gas treatment system and operation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113005257B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114058775A (en) * | 2021-11-18 | 2022-02-18 | 无锡翔龙环球科技股份有限公司 | Multi-section expansion flue of waste heat boiler |
| CN114262764A (en) * | 2021-12-31 | 2022-04-01 | 北京清创晋华科技有限公司 | Converter gas full recovery device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101812562A (en) * | 2010-04-21 | 2010-08-25 | 周建安 | Safe and high-efficiency recovery method for converter gas |
| CN103849705A (en) * | 2014-03-04 | 2014-06-11 | 中钢集团天澄环保科技股份有限公司 | Waste heat recycling and fine particle purifying system and method of converter gas |
| JP2016023358A (en) * | 2014-07-24 | 2016-02-08 | 株式会社Ihi | Purification apparatus for converter gas, converter system and purification method of converter gas |
| CN210765381U (en) * | 2019-11-14 | 2020-06-16 | 北京博鹏中科环保科技有限公司 | LT dry dedusting system |
| CN212293640U (en) * | 2020-04-30 | 2021-01-05 | 云南曲靖呈钢钢铁（集团）有限公司 | Innocent treatment system of steelmaking converter flue gas |
| CN214612612U (en) * | 2021-02-25 | 2021-11-05 | 中冶南方工程技术有限公司 | Converter flue gas treatment system |
-
2021
- 2021-02-25 CN CN202110210218.XA patent/CN113005257B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101812562A (en) * | 2010-04-21 | 2010-08-25 | 周建安 | Safe and high-efficiency recovery method for converter gas |
| CN103849705A (en) * | 2014-03-04 | 2014-06-11 | 中钢集团天澄环保科技股份有限公司 | Waste heat recycling and fine particle purifying system and method of converter gas |
| JP2016023358A (en) * | 2014-07-24 | 2016-02-08 | 株式会社Ihi | Purification apparatus for converter gas, converter system and purification method of converter gas |
| CN210765381U (en) * | 2019-11-14 | 2020-06-16 | 北京博鹏中科环保科技有限公司 | LT dry dedusting system |
| CN212293640U (en) * | 2020-04-30 | 2021-01-05 | 云南曲靖呈钢钢铁（集团）有限公司 | Innocent treatment system of steelmaking converter flue gas |
| CN214612612U (en) * | 2021-02-25 | 2021-11-05 | 中冶南方工程技术有限公司 | Converter flue gas treatment system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114058775A (en) * | 2021-11-18 | 2022-02-18 | 无锡翔龙环球科技股份有限公司 | Multi-section expansion flue of waste heat boiler |
| CN114262764A (en) * | 2021-12-31 | 2022-04-01 | 北京清创晋华科技有限公司 | Converter gas full recovery device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113005257B (en) | 2023-09-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112877499B (en) | Converter flue gas treatment system based on dry dedusting and operation method thereof | |
| CN101570807B (en) | Steel converter coal gas purification and waste heat recycling system | |
| CN108624736B (en) | Converter flue gas purification and waste heat recovery system and method | |
| CN101736117B (en) | Converter fume high-temperature bag dust removal and recycling and secondary steam recycling system | |
| CN109207667B (en) | Pure dry type purification and waste heat deep recovery system and method for converter flue gas | |
| CN113005257A (en) | Converter flue gas treatment system and operation method thereof | |
| CN201485480U (en) | Converter flue gas waste heat recovery and purifying dedusting device | |
| CN212293640U (en) | Innocent treatment system of steelmaking converter flue gas | |
| CN206771420U (en) | A kind of block-resistant type air preheater step-by-step arrangement system | |
| CN214612612U (en) | Converter flue gas treatment system | |
| CN110184409B (en) | Dry-method electric bag combined dust removal system for eliminating smoke plume by ultralow emission of primary flue gas of converter | |
| CN214612611U (en) | Converter flue gas processing system based on dry dedusting | |
| CN216192462U (en) | Converter dry dedusting and smoke discharging system | |
| CN201411468Y (en) | Converter gas purification and afterheat recovery system for steelmaking | |
| CN106996577A (en) | A kind of block-resistant type air preheater step-by-step arrangement system | |
| CN201850285U (en) | Dry dust-collecting system for converter | |
| CN210765381U (en) | LT dry dedusting system | |
| CN113073170A (en) | Converter flue gas waste heat recovery system and method | |
| CN211358356U (en) | Regional VOCs ultra-clean processing system is retrieved to coking plant's chemical production | |
| CN110184410B (en) | Dry dust removal system for ultralow emission of primary flue gas and smoke plume elimination of converter | |
| CN210176895U (en) | Full-dry dedusting system for efficient energy-saving ultra-clean emission of primary flue gas of converter | |
| CN110184411A (en) | The full dry cloth-bag dusting system of the energy-efficient ultra-clean discharge of flue gas of converter | |
| CN112442567A (en) | Converter primary flue gas dedusting method and system | |
| CN109513270A (en) | Supersonic speed fume-dehydrating degranulation object separator | |
| CN213388752U (en) | Primary pure dry dedusting system of converter integrating full waste heat recovery and stable fine purification |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |