CN112143998B - A zinc ash treatment device for continuous hot-dip galvanizing furnace nose - Google Patents
A zinc ash treatment device for continuous hot-dip galvanizing furnace nose Download PDFInfo
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- CN112143998B CN112143998B CN202011038292.XA CN202011038292A CN112143998B CN 112143998 B CN112143998 B CN 112143998B CN 202011038292 A CN202011038292 A CN 202011038292A CN 112143998 B CN112143998 B CN 112143998B
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- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 title claims abstract description 284
- 239000011701 zinc Substances 0.000 title claims abstract description 284
- 229910052725 zinc Inorganic materials 0.000 title claims abstract description 284
- 238000005246 galvanizing Methods 0.000 title claims abstract description 22
- 238000000137 annealing Methods 0.000 claims abstract description 31
- 238000002347 injection Methods 0.000 claims abstract description 30
- 239000007924 injection Substances 0.000 claims abstract description 30
- 229910000831 Steel Inorganic materials 0.000 claims description 101
- 239000010959 steel Substances 0.000 claims description 101
- 230000003014 reinforcing effect Effects 0.000 claims description 11
- 230000007704 transition Effects 0.000 claims description 9
- 230000007246 mechanism Effects 0.000 claims description 7
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 239000007788 liquid Substances 0.000 abstract description 34
- 238000004519 manufacturing process Methods 0.000 abstract description 13
- 230000007547 defect Effects 0.000 abstract description 9
- 210000001331 nose Anatomy 0.000 abstract 6
- 239000007789 gas Substances 0.000 description 87
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 22
- 230000000087 stabilizing effect Effects 0.000 description 14
- 229910052757 nitrogen Inorganic materials 0.000 description 11
- 238000001914 filtration Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 238000004140 cleaning Methods 0.000 description 6
- 238000005507 spraying Methods 0.000 description 6
- 239000001257 hydrogen Substances 0.000 description 5
- 229910052739 hydrogen Inorganic materials 0.000 description 5
- 238000010791 quenching Methods 0.000 description 5
- 230000000171 quenching effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000007747 plating Methods 0.000 description 4
- 238000005192 partition Methods 0.000 description 3
- 230000002829 reductive effect Effects 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000112 cooling gas Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/06—Zinc or cadmium or alloys based thereon
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/003—Apparatus
-
- 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
- Y02P10/20—Recycling
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Coating With Molten Metal (AREA)
Abstract
一种连续热镀锌炉鼻子锌灰处理装置，用于连续热镀锌高速机组的环保锌灰处理，属于热镀锌炉鼻子锌灰处理设备制造技术领域，包括从炉鼻子靠近退火炉一端至炉鼻子靠近锌锅一端依次设置第一抽吸腔室、第二抽吸腔室、第三抽吸腔室、气体喷射腔室的板式锌灰抽吸器，以及与板式锌灰抽吸器连接的截面同圆心的气体喷射管道和气体抽吸管道,本发明采用板式锌灰抽吸器配合外部管道是气体抽吸管道、内部管道是气体喷射管道的气体输送同心管道的方式，设计一种连续热镀锌炉鼻子锌灰处理装置，解决了立式退火炉的炉鼻子在浸没于锌锅中的液态锌中，锌灰随着带钢运行方向粘附在带钢上产生锌灰缺陷的问题。
A zinc ash treatment device for a continuous hot-dip galvanizing furnace nose is used for environmentally friendly zinc ash treatment of continuous hot-dip galvanizing high-speed units, and belongs to the technical field of manufacturing zinc ash treatment equipment for hot-dip galvanizing furnace noses. It includes a plate-type zinc ash extractor in which a first suction chamber, a second suction chamber, a third suction chamber, and a gas injection chamber are sequentially arranged from one end of the furnace nose close to the annealing furnace to one end of the furnace nose close to the zinc pot, and a gas injection pipe and a gas suction pipe with cross-sections concentric with the plate-type zinc ash extractor are connected. The present invention adopts a plate-type zinc ash extractor in combination with a gas delivery concentric pipe in which the outer pipe is a gas suction pipe and the inner pipe is a gas injection pipe to design a zinc ash treatment device for a continuous hot-dip galvanizing furnace nose, which solves the problem that the furnace nose of a vertical annealing furnace is immersed in liquid zinc in the zinc pot, and zinc ash adheres to the strip along the running direction of the strip to produce zinc ash defects.
Description
Technical Field
A nose zinc ash treatment device of a continuous hot galvanizing furnace is used for treating environment-friendly zinc ash of a continuous hot galvanizing high-speed unit, and belongs to the technical field of manufacturing of nose zinc ash treatment equipment of the hot galvanizing furnace.
Background
The furnace nose of the neutral type annealing furnace in continuous hot galvanizing production is immersed in liquid zinc in a zinc pot under normal conditions, zinc steam generated after heating strip steel is immersed in zinc liquid and then meets nitrogen in the furnace nose to generate condensed zinc ash, the zinc ash is brought into a quenching section of the annealing furnace along with nitrogen or nitrogen-hydrogen mixed gas through the furnace nose, the other part of the zinc ash is adhered to the inner wall of the furnace nose, and after excessive aggregation, the zinc ash can fall onto the strip steel and the zinc liquid level in the furnace nose, and zinc ash defects are generated on the strip steel along with the adhesion of the strip steel in the running direction.
After a large amount of zinc ash gathers in the furnace nose of the vertical furnace, abnormal vibration can occur along with the operation of the production line, the influence of the flow of protective gas in the furnace is that the zinc ash drifts to the strip steel and the zinc liquid surface in the furnace nose, because the zinc ash drifts down from top to bottom, most of the zinc ash falls on the upper surface of the strip steel and is taken out of a zinc pot along with the strip steel operated by the production line, a large amount of zinc ash can cause product plating omission or weak coating adhesion, the riveting or stamping DDQ-level household appliance plate can generate coating cracking, dezincification and local plating omission defects, the abrasion to a die during the processing of a client is increased, the service life of the die is reduced, the production cost is improved, the product quality is not ensured, and the local dezincification products flow into places in the south or the north and are corroded too early for use.
A plurality of methods are found for treating and inhibiting zinc ash, such as nitrogen humidifying systems, zinc ash filtering systems, zinc pump and other devices, but the problems of zinc ash generation and influence on product quality cannot be solved fundamentally, the zinc ash adhered to the upper surface of the strip steel is a disadvantageous factor for a sinking roller and a rear stabilizing roller of a zinc pot contacting the upper surface of the strip steel compared with the lower surface of the strip steel, because friction is generated after the zinc ash is adhered to the upper surface of the strip steel and passes through the sinking roller and the rear stabilizing roller, the zinc ash is taken away by the sinking roller and the rear stabilizing roller, the slag adhesion quantity affecting the sinking roller and the rear stabilizing roller is increased, new defects are generated, and the device in the zinc pot is adversely affected.
Disclosure of utility model
The invention aims at overcoming the defects of the prior art, and designs a zinc ash treatment device for a continuous hot galvanizing furnace nose by adopting a mode that a plate type zinc ash aspirator is matched with a gas conveying concentric pipeline in which an external pipeline is a gas suction pipeline and an internal pipeline is a gas injection pipeline, so that the problems that the furnace nose of a vertical annealing furnace is immersed in liquid zinc in a zinc pot, zinc steam generated after heated strip steel is immersed in zinc liquid generates condensed zinc ash when encountering nitrogen in the furnace nose, the zinc ash is brought into a quenching section of an annealing furnace along with nitrogen or nitrogen-hydrogen mixed gas through the furnace nose, adheres to the inner wall of the furnace nose, drifts to the strip steel and the zinc liquid level in the furnace nose after being gathered too much, and adheres to strip steel along with the running direction of the strip steel to generate zinc ash defects are solved.
In order to solve the technical problems, the invention adopts the following technical scheme:
The utility model provides a continuous hot galvanizing furnace nose zinc ash processing apparatus, includes the board-like zinc ash aspirator that is located belted steel surface on the furnace nose inside wall, and the projection of board-like zinc ash aspirator on the vertical face of the length direction line collineation of belted steel in the furnace nose is trapezoidal shape, and the longer base of trapezoidal shape and the inside wall fixed connection of furnace nose, board-like zinc ash aspirator is close to annealing stove one end to the furnace nose and is close to zinc pot one end and set gradually first suction chamber, second suction chamber, third suction chamber, gas injection chamber from the furnace nose, board-like zinc ash aspirator is close to the gas transmission concentric tube who runs through furnace nose lateral wall one end connection of furnace nose inside wall, gas transmission concentric tube includes gas injection tube and gas suction tube that the cross-section is concentric, and gas injection tube is located the gas suction tube, gas injection tube is at furnace nose internal connection ventilation body injection chamber, and gas suction tube communicates first suction chamber, second suction chamber, third suction chamber, gas injection chamber respectively at the furnace nose in the internal one end connection zinc ash processing mechanism of furnace nose.
In the invention, the plate-type zinc ash aspirator is arranged on the inner side wall of the furnace nose of the zinc plating annealing furnace, the plate-type zinc ash aspirator is correspondingly arranged on the surface of the strip steel and is arranged in the width direction of the furnace nose, furnace gas containing zinc ash in the furnace nose is pumped out and filtered by the plate-type zinc ash aspirator and then is sent into the furnace nose to be close to the annealing furnace, the inner part of the furnace nose is sealed by zinc liquid in a furnace nose through the tail end opening of the zinc pot, the possibility that air enters the furnace nose to affect the furnace atmosphere of the annealing furnace is avoided, the strip steel enters zinc liquid after being heated by the annealing furnace, zinc ash is generated in the furnace nose after the zinc liquid level contacts with high-temperature strip steel, the strip steel passes through a rear stabilizing roller and a front stabilizing roller, the strip steel upwards runs out of the zinc pot after bypassing a zinc pot sinking roller, one end with the longest side length is arranged in the furnace nose, the whole is in a flat shape, two tail ends are gradually contracted and are tightly attached to the furnace nose, the nearest end of the strip steel is in a trapezoid highest point, a mode of gradually transitional is adopted, even if the strip steel is scraped to the tail end opening of the furnace nose, the strip steel does not cause broken strip steel, a gas conveying pipeline is possibly, the first suction cavity and a second suction cavity is concentric, the first suction cavity and a second suction cavity and a third suction cavity are arranged in the pipeline are in a temperature-controlled, the temperature-dependent mode, the temperature is sprayed, the temperature is not affected by the temperature is sprayed, the temperature is sprayed and the temperature is sprayed to the pipeline is in the pipeline, and the pipeline is sprayed, and the temperature is sprayed and the temperature is the pipeline and the temperature is sprayed, and the temperature is the temperature pipeline and the temperature is the air pipeline and the temperature is sprayed and the temperature. The use efficiency of the jet gas is improved; the invention relates to a zinc ash treatment device for a continuous hot galvanizing furnace nose, which solves the problems that the furnace nose of a vertical annealing furnace is immersed in liquid zinc in a zinc pot, zinc vapor generated after the heated strip steel is immersed in the zinc liquid generates condensed zinc ash when encountering nitrogen in the furnace nose, the zinc ash is brought into a quenching section of the annealing furnace along with nitrogen or nitrogen-hydrogen mixed gas through the furnace nose and adheres to the inner wall of the furnace nose, and then falls onto the strip steel and the zinc liquid surface in the furnace nose to generate zinc ash defects along with the strip steel running direction.
As a preferable mode, the surface of the plate zinc ash aspirator is provided with a plurality of aspiration holes with the interval of 10-20mm and the diameter of 8-12 mm.
As a preferable mode, the surface of the plate zinc ash aspirator is provided with a plurality of slit type suction nozzles which are perpendicular to the surface of the strip steel or staggered and have an inclination of 30-90 degrees, the distance between the slit type suction nozzles is 50-500mm, and the inner diameter of the slit type suction nozzle is 8-10mm.
As a preferable mode, the zinc ash treatment mechanism comprises a suction filter, the input end of the suction filter is communicated with the gas suction pipeline through a filter suction pipeline, the output end of the suction filter is respectively provided with a filter exhaust pipeline and a filter conveying pipeline, one end of the filter exhaust pipeline, which is far away from the suction filter, is communicated with the interior of the furnace nose near the annealing furnace, and one end of the filter conveying pipeline, which is far away from the suction filter, is connected with a zinc ash bucket.
As a preferable mode, the upper surface and the lower surface of the strip steel on the inner side wall of the furnace nose are all staggered, and the distance from the plate zinc ash aspirator on the upper surface of the strip steel to the upper surface of the strip steel is equal to the distance from the plate zinc ash aspirator on the lower surface of the strip steel to the lower surface of the strip steel.
As a preferable mode, a suction balance cavity is arranged among the first suction cavity, the second suction cavity and the third suction cavity, a reinforcing rib penetrating the plate type zinc ash aspirator is arranged on the suction balance cavity, and the reinforcing rib is perpendicular to the inner side wall of the furnace nose.
In a preferred manner, the reinforcing ribs are two partition plates, and the two partition plates separate a transition zone parallel to the strip steel in the third suction cavity.
As a preferable mode, the external vibrator of the furnace nose is arranged on the outer side wall of the furnace nose.
Compared with the prior art, the invention has the beneficial effects that:
(1) The invention designs a zinc ash treatment device for a continuous hot galvanizing furnace nose by adopting a mode that a plate zinc ash aspirator is matched with a gas conveying concentric pipeline, wherein an external pipeline is a gas suction pipeline, and an internal pipeline is a gas injection pipeline, so that the problems that zinc ash is condensed when zinc steam generated by heating strip steel immersed in zinc liquid encounters nitrogen in the furnace nose and is brought into a quenching section of the annealing furnace along with nitrogen or nitrogen-hydrogen mixed gas and is adhered to the inner wall of the furnace nose, and the zinc ash can fall onto the strip steel and the zinc liquid surface in the furnace nose after being gathered too much and adhere to the strip steel along with the running direction of the strip steel, and zinc ash defects are generated.
(2) The invention adopts a cavity formed by porous suction zinc ash isolating plates on the surface of the plate zinc ash aspirator, and the zinc ash in the furnace nose is sucked in the largest area.
(3) The invention adopts a plurality of slit suction nozzles with 30-90 degrees of inclination in directions perpendicular to the surface of the strip steel or staggered, and can absorb zinc ash in the furnace nose 1 and on the surface of the strip steel in a large area.
(4) The gas conveying concentric pipeline of the plate type zinc ash aspirator is connected with a zinc ash filter suction pipeline, a zinc ash filter suction pipeline is connected with a zinc ash filter suction pipeline, a zinc ash filter exhaust pipeline and a zinc ash filter conveying pipeline are connected, and the zinc ash filter conveying pipeline is connected with a zinc ash collecting cabin. The plate type zinc ash aspirator is used for pumping out the furnace gas with zinc ash and conveying the furnace gas to the zinc ash suction filter for filtering through the zinc ash filter suction pipeline, the zinc ash suction filter also has the functions of sucking and filtering zinc ash, and clean gas after the filtration is completely conveyed to the ascending section of the furnace nose through the zinc ash filter exhaust pipeline by utilizing the pressure provided by the zinc ash suction filter for recycling, so that the normal furnace pressure is ensured, and the energy consumption is reduced. And the zinc ash filtered by the zinc ash suction filter is conveyed into a zinc ash collecting cabin tank through a pipeline for centralized treatment.
(5) According to the invention, two sets of corresponding plate type zinc ash aspirators are arranged in the furnace nose 1 of the zinc-plated annealing furnace and are respectively arranged on the upper surface and the lower surface of strip steel, the furnace nose is arranged in the width direction of the furnace nose, furnace gas containing zinc ash in the furnace nose is pumped out and filtered by the plate type zinc ash aspirators and then is fed into a section of the furnace nose close to the annealing furnace, the furnace nose 1 is inserted into zinc liquid in a zinc pot, the zinc liquid level keeps a certain immersion distance with the tail end of the furnace nose, the air is prevented from entering the furnace nose, the lowest end of the plate type zinc ash aspirators close to the zinc pot keeps a safe distance of 300-500mm with the zinc liquid level, strip steel enters the zinc pot after passing through the telescopic furnace nose, vertically turns upwards after bypassing a zinc pot sink roll, a front stabilizing roller and a rear stabilizing roller of the zinc pot stabilize the shaking of the strip steel in the running process, the inner part of the furnace nose is prevented from influencing the inner atmosphere of the furnace nose by the zinc liquid seal of the zinc pot after the strip steel is heated, the strip steel enters the zinc liquid in the annealing furnace after the zinc liquid level contacts with the strip steel, and the zinc liquid level can influence the inner part of the furnace nose after bypassing the zinc sink roll and passes through the front stabilizing roller and the front stabilizing roller; the plate type zinc ash aspirator corresponding to the upper surface of the strip steel in the furnace nose is characterized in that the zinc ash quantity existing on the upper surface of the strip steel is large relative to the zinc ash quantity of the lower surface of the strip steel, the zinc ash can flow to other sections of the annealing furnace along with the protective gas in the furnace after the zinc ash is generated, a large quantity of zinc ash can be continuously gathered on a shell in the furnace nose along with the extension of production time and covers the surface, the zinc ash at the top end and two sides of the inside of the furnace nose is vibrated to fall downwards, one part of the zinc ash falls on the upper surface of the strip steel, the other part of the zinc ash falls on the bottom of the furnace nose in a gap between the edge part of the strip steel and the side wall of the furnace nose, and the smaller the zinc ash falling on the bottom of the furnace nose is the wider the strip steel, and the larger the zinc ash falling on the bottom of the furnace nose is on the contrary; a large amount of zinc ash drifts on the upper surface of the strip steel, one part is adhered to the strip steel to be taken away by the running of the strip steel, and the other part is gathered on the surface of the zinc liquid in the furnace nose; the zinc ash amount processed by the plate zinc ash aspirator corresponding to the upper surface of the strip steel is larger than that of the plate zinc ash aspirator corresponding to the lower surface of the strip steel.
(6) The reinforcing ribs arranged in the plate zinc ash aspirator are connected with the gas conveying concentric pipeline, the first suction cavity, the second suction cavity and the third suction cavity, and are welded on the suction balance cavity and penetrate through the suction balance cavity; the plate type zinc ash aspirator adopts stainless steel series, has the capability of resisting high temperature and harmful gas corrosion, and the inside of the plate type zinc ash aspirator adopts the structural design of the reinforcing ribs inside the plate type zinc ash aspirator, so that the cavity deformation or damage caused by serious plate type bad scratch is prevented.
(7) The transition area parallel to the strip steel is arranged between the second suction cavity and the third suction cavity which are closer to the strip steel, the suction force of the transition area is larger than that of other transition areas, and the mode that one end with the longest side length of the plate type zinc ash aspirator is arranged in the furnace nose is matched, so that the whole of the plate type zinc ash aspirator is in a flat shape, the two tail ends are gradually contracted and tightly attached to the inside of the furnace nose, the nearest end of the strip steel is at the highest point of a trapezoid, and the strip steel is unlikely to cause strip steel breakage even if being scratched to the plate type zinc ash aspirator in a gradual transition mode, so that the passing rate of a bad plate type is improved.
(8) According to the invention, the external vibrator of the furnace nose is arranged outside the furnace nose, both alternating current and direct current are used, the vibration frequency is adjustable, the vibration power is required to meet the requirement that the furnace nose can lighten the zinc ash attached to the interior of the furnace nose under a certain vibration amplitude, the vibrator is used for vibrating before thoroughly cleaning the zinc ash of the furnace nose, the zinc ash attached to the interior of the furnace nose and incapable of being treated is separated from attached objects through vibration and falls below the furnace nose, and the zinc ash falling at the tail end of the furnace nose is cleaned again through the gas sprayed by the gas spraying cavity of the plate-type zinc ash aspirator, so that the aim of thoroughly cleaning the zinc ash is fulfilled.
Drawings
FIG. 1 is a front view of a plate zinc ash aspirator of the present invention;
FIG. 2 is a top view of a plate zinc ash aspirator of the present invention;
FIG. 3 is a left side view of the plate zinc ash aspirator of the present invention;
FIG. 4 is a schematic diagram of the gas conveying concentric pipes of the plate zinc ash aspirator of the present invention;
FIG. 5 is a schematic diagram of the practical application of the present invention;
FIG. 6 is a schematic diagram of the flow of gas through a plate zinc ash aspirator;
FIG. 7 is a schematic diagram of zinc ash filtration by a plate zinc ash aspirator.
Wherein, 1, furnace nose; 101. plate zinc ash aspirator; 1010. the inner side wall of the furnace nose; 1011. the furnace nose is externally provided with a vibrator; 1012. a gas delivery concentric conduit; 10121. a gas suction duct; 10122. a gas injection line; 1013. a suction balance chamber; 1014. a gas injection chamber; 1015. a first suction chamber; 1016. a second suction chamber; 1017. reinforcing ribs; 1018. a third suction chamber; 1019. a suction hole; 102. a zinc ash collecting cabin; 1021. a filter exhaust duct; 1022. a suction filter; 1023. a filter delivery conduit; 1024. a filter suction duct; 1025. a zinc ash bucket; 1026. a transition zone; 103. a jet pipe; 2. strip steel; 3. a zinc pot; 4. zinc liquid; 5. sinking roller of zinc pot; 6. a rear stabilizing roller; 7. a front stabilizing roller; 8. zinc liquid level.
Detailed Description
Example 1:
Referring to fig. 1-7, a zinc ash treatment device for a continuous hot galvanizing furnace nose comprises a plate zinc ash aspirator 101 positioned on the surface of strip steel 2 on the inner side wall 1010 of the furnace nose, wherein the projection of the plate zinc ash aspirator 101 on a vertical surface which is collinear with the length direction line of the strip steel 2 in the furnace nose 1 is in a trapezoid shape, the longer bottom edge of the trapezoid shape is fixedly connected with the inner side wall of the furnace nose 1, the plate zinc ash aspirator 101 is sequentially provided with a first suction chamber 1015, a second suction chamber 1016, a third suction chamber 1018 and a gas injection chamber 1014 from one end of the furnace nose 1 close to the annealing furnace to one end of the furnace nose 1 close to the zinc pot 3, one end of the plate zinc ash aspirator 101 close to the inner side wall of the furnace nose 1 is connected with a gas conveying concentric pipeline 1012 penetrating through the side wall of the furnace nose 1, the gas conveying concentric pipeline 1012 comprises a gas injection pipeline 10122 and a gas suction pipeline 10121, the gas injection pipeline 10122 is positioned in the gas suction pipeline 10121, the gas injection pipeline 10122 is fixedly connected with the inner side wall of the furnace nose 1, the gas suction pipeline 10121 is respectively communicated with the first suction chamber 1015, the second suction chamber 1016 and the gas suction chamber 1014 is connected with the end of the zinc ash treatment mechanism 1018 outside the furnace nose 1.
Further, the surface of the plate zinc ash aspirator 101 is provided with a plurality of slit type suction nozzles which are perpendicular to the surface of the strip steel 2 or are staggered and have an inclination of 30-90 degrees, the distance between the slit suction nozzles is 50-500mm, the inner diameter of the slit suction nozzle is 8-10mm, and zinc ash in the furnace nose 1 and on the surface of the strip steel can be absorbed in a large area.
In the embodiment, a plate zinc ash aspirator 101 is arranged on the inner side wall 1010 of a furnace nose of a zinc plating annealing furnace, the plate zinc ash aspirator 101 is correspondingly arranged on the surface of strip steel 2 and is arranged in the width direction of the furnace nose 1, furnace gas containing zinc ash in the furnace nose 1 is pumped and filtered by the plate zinc ash aspirator 101 and then is fed into the furnace nose 1 to be close to the annealing furnace, the inner part of the furnace nose 1 is sealed by zinc liquid in a zinc pot 3 at the tail end opening of the furnace nose 1, the influence of air on the furnace atmosphere of the annealing furnace caused by the inner part of the furnace nose 1 is avoided, strip steel 2 enters zinc liquid 4 after being heated by the annealing furnace, zinc ash is generated in the furnace nose 1 after the zinc liquid surface is contacted with high-temperature strip steel 2, the strip steel 2 passes through a rear stabilizing roller 6 and a front stabilizing roller 7 and then goes out of the zinc pot 3 to move upwards, one end with the longest edge of the plate zinc ash aspirator 101 is arranged on the inner side wall 1010 of the furnace nose, the whole plate zinc ash aspirator 101 is in a flat shape, two tail ends are gradually contracted and tightly attached between two ends of a furnace nose 1, the nearest end of a strip steel 2 is at the highest point of a trapezoid, a gradual transition mode is adopted, the strip steel 2 is not likely to cause strip steel 2 to break even if being scratched to the plate zinc ash aspirator 101, a gas conveying concentric pipeline 1012 is a combination of a gas suction pipeline 10121 and an air supply pipeline of a gas injection pipeline 10122, the gas suction pipeline 10122 and the air injection pipeline are mutually independent to suck gas and inject gas, the gas injection pipeline 10122 is positioned in the gas suction pipeline 10121, in order not to influence the plate temperature of the strip steel 2 by the influence of cooling gas, the gas injection pipeline 10122 is used for transferring heat generated by heating small flow of injected gas to the pipeline wall through heat transfer of the high temperature gas suction pipeline 10121, so that the temperature of the injected gas is close to the plate Wen Xiangjie of the strip steel 2, the accurate control of the actual plate temperature of the strip steel 2 entering the zinc pot 3 is ensured, and the use efficiency of the sprayed gas is improved; the invention relates to a continuous hot galvanizing furnace nose zinc ash treatment device, which solves the problems that the furnace nose 1 of a vertical annealing furnace is immersed in liquid zinc in a zinc pot 3, zinc steam generated after heating the steel strip 2 is immersed in zinc liquid 4, and then the zinc ash is condensed when encountering nitrogen in the furnace nose 1, and the zinc ash is brought into a quenching section of the annealing furnace along with nitrogen or nitrogen-hydrogen mixed gas and adhered to the inner side wall 1010 of the furnace nose, and then falls onto the steel strip 2 and the zinc liquid surface in the furnace nose 1 along with the running direction of the steel strip 2 after being gathered too much, thereby generating zinc ash defects.
Example 2:
Referring to fig. 1-7, a zinc ash treatment device for a continuous hot galvanizing furnace nose comprises a plate zinc ash aspirator 101 positioned on the surface of strip steel 2 on the inner side wall 1010 of the furnace nose, wherein the projection of the plate zinc ash aspirator 101 on a vertical surface which is collinear with the length direction line of the strip steel 2 in the furnace nose 1 is in a trapezoid shape, the longer bottom edge of the trapezoid shape is fixedly connected with the inner side wall of the furnace nose 1, the plate zinc ash aspirator 101 is sequentially provided with a first suction chamber 1015, a second suction chamber 1016, a third suction chamber 1018 and a gas injection chamber 1014 from one end of the furnace nose 1 close to the annealing furnace to one end of the furnace nose 1 close to the zinc pot 3, one end of the plate zinc ash aspirator 101 close to the inner side wall of the furnace nose 1 is connected with a gas conveying concentric pipeline 1012 penetrating through the side wall of the furnace nose 1, the gas conveying concentric pipeline 1012 comprises a gas injection pipeline 10122 and a gas suction pipeline 10121, the gas injection pipeline 10122 is positioned in the gas suction pipeline 10121, the gas injection pipeline 10122 is fixedly connected with the inner side wall of the furnace nose 1, the gas suction pipeline 10121 is respectively communicated with the first suction chamber 1015, the second suction chamber 1016 and the gas suction chamber 1014 is connected with the end of the zinc ash treatment mechanism 1018 outside the furnace nose 1.
Further, the surface of the plate zinc ash aspirator 101 is provided with a plurality of suction holes 1019 with the interval of 10-20mm and the diameter of 8-12mm, and the surface of the plate zinc ash aspirator 101 adopts a cavity formed by porous suction zinc ash isolation plates to suck zinc ash in the furnace nose 1 in the largest area.
Further, the zinc ash treatment mechanism comprises a suction filter 1022, the input end of the suction filter 1022 is communicated with the gas suction pipeline 10121 through a filter suction pipeline 1024, the output end of the suction filter 1022 is respectively provided with a filter exhaust pipeline 1021 and a filter conveying pipeline 1023, one end of the filter exhaust pipeline 1021 away from the suction filter 1022 is communicated with the interior of the furnace nose 1 near the furnace nose 1 and near the annealing furnace, and one end of the filter conveying pipeline 1023 away from the suction filter 1022 is connected with a zinc ash hopper 1025.
Further, the inner side wall 1010 of the furnace nose is provided with a plurality of plate zinc ash aspirators 101 on the upper surface and the lower surface of the strip steel 2 in a staggered manner, and the distance from the plate zinc ash aspirators 101 on the upper surface of the strip steel 2 to the upper surface of the strip steel 2 is equal to the distance from the plate zinc ash aspirators 101 on the lower surface of the strip steel 2 to the lower surface of the strip steel 2.
Further, a suction balance cavity 1013 is provided in the middle of the first suction cavity 1015, the second suction cavity 1016 and the third suction cavity 1018, a reinforcing rib (1017) penetrating the plate zinc ash aspirator 101 is provided on the suction balance cavity 1013, the reinforcing rib 1017 is perpendicular to the inner side wall 1010 of the furnace nose, and the reinforcing rib 1017 is structurally designed in the plate zinc ash aspirator 101, so that the cavity is prevented from being deformed or damaged due to serious plate type bad scratches.
Further, the ribs 1017 are two partitions that space the third pumping chamber 1018 apart by a transition zone 1026 parallel to the strip 2.
Further, the external vibrator 1011 of the furnace nose is arranged on the outer side wall of the furnace nose 1, the external vibrator 1011 of the furnace nose is driven by alternating current or direct current, the vibration frequency is adjustable, the vibration power is required to meet the requirement that the furnace nose 1 can lighten the zinc ash amount attached to the inner part of the furnace nose 1 under a certain amplitude, the external vibrator 1011 of the furnace nose is used for vibrating before thoroughly cleaning the zinc ash of the furnace nose, the zinc ash attached to the inner part of the furnace nose 1 can leave attached objects through vibration, the zinc ash falls below the furnace nose 1, and the zinc ash falling at the tail end of the furnace nose 1 is cleaned again by gas sprayed out from the gas spraying chamber 1014 of the plate-type zinc ash aspirator 101, so that the purpose of thoroughly cleaning the zinc ash is achieved.
The using method of the nose zinc ash treatment device of the continuous hot galvanizing furnace in the embodiment comprises a using method of fault shutdown in a short time and a using method of planned zinc ash cleaning in a normal production process.
The short-time fault shutdown processing method comprises the following steps: after stopping, firstly, the external vibrator 1011 of the furnace nose is opened to shake the zinc ash in the furnace nose 1 through vibrating the furnace nose 1, then the suction function and the gas spraying function of the plate-type zinc ash aspirator 101 are opened, so that the furnace gas containing the zinc ash is sucked outwards by the first suction chamber 1015, the second suction chamber 1016 and the third suction chamber 1018 for filtering treatment, the gas spraying pipeline 10122 sprays gas to blow the zinc ash attached to the surface of the strip steel 2 to the lower part in the furnace nose 1, the zinc ash is fished out together with zinc slag through a manual or robot for centralized treatment, the external vibrator 1011 of the furnace nose stops after the zinc ash treatment is finished, the furnace nose 1 is lowered to a normal on-line position, and other functions of the plate-type zinc ash aspirator 101 are stopped.
The method for cleaning the zinc ash of the furnace nose in the normal production process comprises the following steps: firstly, starting a zinc pump of the zinc liquid level of a furnace nose in the prior art to treat zinc ash, starting an external vibrator 1011 of the furnace nose to vibrate and drop the zinc ash attached to the interior of the furnace nose 1 through vibrating the furnace nose 1, and then opening the suction function and the gas spraying function of a plate-type zinc ash aspirator 101 to enable a first suction cavity 1015, a second suction cavity 1016 and a third suction cavity 1018 to suck the furnace gas containing the zinc ash outwards for filtering treatment, and enabling a gas spraying pipeline 10122 to spray gas to blow the zinc ash attached to the lower section of the strip steel 2 to the lower part of the furnace nose 1 and to pump the zinc ash to the outside of the furnace nose 1 for treatment through the zinc pump; the external vibrator 1011 of the furnace nose is carefully used in the normal production state, because a great deal of zinc ash can fall off when the furnace nose 1 is vibrated in the use process, the plate type zinc ash aspirator 101 cannot treat the surface of the strip steel 2 so as to generate a great deal of degraded products; the plate type zinc ash aspirator zinc ash filtering system is normally put into use in the production process, and continuously pumps, sprays, filters and collects zinc ash to form a complete cycle, so that normal furnace pressure is ensured, the influence of the zinc ash on products is reduced, and the surface quality and the product performance of the products are improved. The suction capacity and the injection pressure related to the invention are specifically regulated according to the type of the produced product, the stability of the zinc liquid level is also considered, and for the production line speed, the aluminum content in the zinc pot components, the temperature of the annealing furnace entering the zinc pot plate, the thickness of strip steel, the width, the strip steel plate shape, the safe use and other aspects are considered, so that different parameters can be set under different production conditions, and the invention is suitable for the actual needs and demands of the site.
Claims (4)
1. A nose zinc ash treatment device of a continuous hot galvanizing furnace is characterized in that: the furnace comprises a plate zinc ash aspirator (101) positioned on the surface of a strip steel (2) on the inner side wall (1010) of a furnace nose, wherein the projection of the plate zinc ash aspirator (101) on the vertical surface of the furnace nose (1) which is collinear with the length direction line of the strip steel (2) is in a trapezoid shape, the bottom edge of the trapezoid shape is fixedly connected with the inner side wall of the furnace nose (1), the plate zinc ash aspirator (101) is sequentially provided with a first suction chamber (1015), a second suction chamber (1016), a third suction chamber (1018) and a gas injection chamber (1014) from one end, close to an annealing furnace end, of the furnace nose (1) to one end, close to a zinc pot (3), of the furnace nose (1), the plate zinc ash aspirator (101) is connected with a gas conveying concentric pipeline (1012) penetrating through the side wall of the furnace nose (1) near one end of the inner side wall of the furnace nose (1), the gas conveying concentric pipeline (1012) comprises a gas injection pipeline (10122) and a gas suction pipeline (10121) with concentric cross section, the gas injection pipeline (10122) is positioned in the gas suction pipeline (10121), the gas injection pipeline (10122) is connected with the first suction chamber (1018) in the first suction chamber (1014) and the second suction chamber (1018) at one end, the first suction chamber (1014) is communicated with the first suction chamber (1018) at the inner side of the furnace nose (1), the end part of the gas suction pipeline (10121) outside the furnace nose (1) is connected with a zinc ash treatment mechanism;
The upper surface and the lower surface of the strip steel (2) on the inner side wall (1010) of the furnace nose are provided with a plurality of plate-type zinc ash aspirators (101) in a staggered mode, and the distance from the plate-type zinc ash aspirators (101) positioned on the upper surface of the strip steel (2) to the upper surface of the strip steel (2) is equal to the distance from the plate-type zinc ash aspirators (101) positioned on the lower surface of the strip steel (2) to the lower surface of the strip steel (2);
A suction balance cavity (1013) is arranged among the first suction cavity (1015), the second suction cavity (1016) and the third suction cavity (1018), a reinforcing rib (1017) penetrating through the plate-type zinc ash aspirator (101) is arranged on the suction balance cavity (1013), and the reinforcing rib (1017) is perpendicular to the inner side wall (1010) of the furnace nose;
The ribs (1017) are two baffles which separate a transition zone (1026) parallel to the strip (2) from the third suction chamber (1018).
2. The continuous hot dip galvanizing furnace nose zinc ash treatment device according to claim 1, wherein: the surface of the plate zinc ash aspirator (101) is provided with a plurality of aspiration holes (1019) with the interval of 10-20mm and the diameter of 8-12 mm.
3. The continuous hot dip galvanizing furnace nose zinc ash treatment device according to claim 1, wherein: the zinc ash treatment mechanism comprises a suction filter (1022), the input end of the suction filter (1022) is communicated with the gas suction pipeline (10121) through a filter suction pipeline (1024), the output end of the suction filter (1022) is respectively provided with a filter exhaust pipeline (1021) and a filter conveying pipeline (1023), one end, far away from the suction filter (1022), of the filter exhaust pipeline (1021) is communicated with the interior of the furnace nose (1) near the annealing furnace, and one end, far away from the suction filter (1022), of the filter conveying pipeline (1023) is connected with a zinc ash bucket (1025).
4. The continuous hot dip galvanizing furnace nose zinc ash treatment device according to claim 1, wherein: an external vibrator (1011) of the furnace nose is arranged on the outer side wall of the furnace nose (1).
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| CN113173275B (en) * | 2021-04-16 | 2023-02-28 | 徐州瑞马智能技术有限公司 | A method of using an automatic device for collecting, separating and packaging zinc ash |
| CN113106367B (en) * | 2021-04-16 | 2023-02-21 | 徐州瑞马智能技术有限公司 | Automatic device for collecting zinc ash and use method thereof |
| CN117431485A (en) * | 2022-07-12 | 2024-01-23 | 宝山钢铁股份有限公司 | Hot galvanizing furnace nose assembly with multiple working modes and internal atmosphere control method thereof |
| CN117966067B (en) * | 2024-04-02 | 2024-06-11 | 上海东新冶金技术工程有限公司 | Heating mechanism for hot galvanizing furnace nose |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202830136U (en) * | 2012-05-24 | 2013-03-27 | 河北钢铁股份有限公司邯郸分公司 | Device for eliminating zinc ash and restraining formation of zinc ash inside hot galvanizing furnace nose |
| CN206768198U (en) * | 2017-06-01 | 2017-12-19 | 浙江协和陶瓷有限公司 | Pretreating device is dried in a kind of galvanizing |
| CN108624832A (en) * | 2018-07-10 | 2018-10-09 | 河北首燕机械股份有限公司 | Inhibit and remove zinc gray device in hot galvanizing furnace nose |
| CN111500961A (en) * | 2020-05-27 | 2020-08-07 | 宝钢工程技术集团有限公司 | Device for improving cleanliness of atmosphere in furnace nose and using method thereof |
| CN214142496U (en) * | 2020-09-28 | 2021-09-07 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Nose zinc ash treatment device of continuous hot galvanizing furnace |
-
2020
- 2020-09-28 CN CN202011038292.XA patent/CN112143998B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202830136U (en) * | 2012-05-24 | 2013-03-27 | 河北钢铁股份有限公司邯郸分公司 | Device for eliminating zinc ash and restraining formation of zinc ash inside hot galvanizing furnace nose |
| CN206768198U (en) * | 2017-06-01 | 2017-12-19 | 浙江协和陶瓷有限公司 | Pretreating device is dried in a kind of galvanizing |
| CN108624832A (en) * | 2018-07-10 | 2018-10-09 | 河北首燕机械股份有限公司 | Inhibit and remove zinc gray device in hot galvanizing furnace nose |
| CN111500961A (en) * | 2020-05-27 | 2020-08-07 | 宝钢工程技术集团有限公司 | Device for improving cleanliness of atmosphere in furnace nose and using method thereof |
| CN214142496U (en) * | 2020-09-28 | 2021-09-07 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Nose zinc ash treatment device of continuous hot galvanizing furnace |
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