CN117587179A - Online cleaning method for foreign matters at blind end of blast furnace tuyere blow tube - Google Patents
Online cleaning method for foreign matters at blind end of blast furnace tuyere blow tube Download PDFInfo
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- CN117587179A CN117587179A CN202311624680.XA CN202311624680A CN117587179A CN 117587179 A CN117587179 A CN 117587179A CN 202311624680 A CN202311624680 A CN 202311624680A CN 117587179 A CN117587179 A CN 117587179A
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- 238000004140 cleaning Methods 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 32
- 239000003245 coal Substances 0.000 claims abstract description 26
- 244000144985 peep Species 0.000 claims abstract description 16
- 238000001514 detection method Methods 0.000 claims abstract description 13
- 208000008918 voyeurism Diseases 0.000 claims description 19
- 210000004907 gland Anatomy 0.000 claims description 9
- 230000007704 transition Effects 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000003723 Smelting Methods 0.000 abstract description 2
- 239000002245 particle Substances 0.000 description 6
- 238000007664 blowing Methods 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- 238000013016 damping Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 206010053615 Thermal burn Diseases 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 239000004570 mortar (masonry) Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 206010017740 Gas poisoning Diseases 0.000 description 1
- 206010019345 Heat stroke Diseases 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005465 channeling Effects 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/16—Tuyéres
- C21B7/163—Blowpipe assembly
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
- B08B9/0321—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid
-
- 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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Cleaning In General (AREA)
Abstract
The invention belongs to the technical field of blast furnace smelting, and discloses an online cleaning method for foreign matters at a blind end of a blast furnace tuyere blowpipe, which comprises the following steps: observing whether the tuyere coal flow at the blind end of the blowpipe is visible or not; if the coal flow at the air port is invisible, judging that the blind end of the blowpipe is blocked, closing the first cut-off valve, and taking down the peep hole cover assembly; connecting the adapter with the first cut-off valve, and sequentially connecting the connecting pipeline, the second cut-off valve and the compressed air source; installing a pressure detection part and a pressure relief valve between the connecting pipeline and the second cut-off valve, and opening the second cut-off valve to obtain the actual pressure value of the pressure detection part; if the actual pressure value is greater than or equal to the preset pressure value, opening a first cut-off valve; after waiting for a preset time, closing the first cut-off valve and opening the pressure relief valve; the adapter is removed and the peephole cap assembly is reinstalled. The method reduces the labor intensity of operators, eliminates the hidden trouble of safe production, prolongs the service life of equipment and improves the running reliability of the equipment.
Description
Technical Field
The invention relates to the technical field of blast furnace smelting, in particular to an online cleaning method for foreign matters at the blind end of a blast furnace tuyere blowpipe.
Background
In the later stage of the furnace, along with the continuous circulation of the furnace burning and air supply heat exchange process of the hot blast furnace, the refractory material bears the action of high temperature and high pressure for a long time, and the high temperature creep appears to cause the cracking and the air channeling of the partition wall of the hot blast furnace. The impurities such as broken refractory particles, mortar, grouting materials and the like generated by collapse and deformation in the hot blast furnace and the hot blast pipe system are blown to the middle section by hot blast through the hot blast main pipe-surrounding pipe and enter the blowing pipe, under the action of gravity and the disturbance of hot blast air flow, a part of the impurities are blown into the blast furnace, a part of the impurities can be blown to the blind end of the sight hole of the blowing pipe, fall into the blind end and then are gathered together with dust and the like generated by the mortar, so that the blind end sight hole cover plate is blocked.
The blind end of the blowpipe is blocked and not cleaned in time, so that observation of a peeping hole is affected, and the condition of a tuyere, the state of coal flow (the coal flow is not correct, a tuyere small sleeve is worn by the coal flow, and the blocked coal cannot be discovered in the first time) and the like cannot be observed; or the large refractory material is clamped at the coal gun head of the blowpipe, so that the blowpipe is filled with coal dust; or the abrasion of the tuyere small sleeve by the injected pulverized coal can not be found in time, so that the tuyere is burnt through, and the service life of the tuyere small sleeve is reduced.
The conventional method for cleaning large particles at the blind end of the blowpipe comprises the following steps: in the cleaning process, firstly, a hot air cut-off valve is closed, and a blind end peeping hole cover of the blowpipe is detached; then the hot air cut-off valve is opened to blow out high-temperature and high-pressure hot air from the peep hole cover plate at the blind end, and small particles and accumulated ash at the blind end are brought out in the hot air blowing-out process. The conventional method has the defects that a large amount of hot air is blown out from the peephole, so that the spile of the peephole is heated up rapidly, and the spile can generate harsh noise during cleaning. Meanwhile, blown particles and accumulated dust generate a large amount of dust, and the high-temperature state has higher operation requirements on post personnel, and the risks of scalding, heatstroke and gas poisoning exist. And the blind end position of the pipeline still has the problem of impurity retention, and the blind end position is gathered again under the disturbance of hot air, so that secondary cleaning is required, and the labor intensity of workers is enhanced. When serious, foreign matters are blocked on the hot air cut-off valve, so that the hot air cut-off valve is not tightly closed and leaks air, the peeping hole cover at the blind end of the blowpipe cannot be assembled back, the blast furnace is forced to be subjected to large-scale wind reduction and damping fit for treatment, and the yield and personal safety of the blast furnace are seriously influenced.
Disclosure of Invention
The invention aims to provide an online cleaning method for foreign matters at the blind end of a blast furnace tuyere blowpipe, which reduces the labor intensity of operators, eliminates hidden danger of safe production, prolongs the service life of equipment and improves the operation reliability of the equipment.
To achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a blast furnace tuyere blowpipe blind end foreign matter online cleaning method for clear up the foreign matter of blowpipe blind end, the blowpipe blind end is connected in the one end of first trip valve, the other end of first trip valve is selected one and is detachably connected with peep hole lid subassembly or adaptor, when the blowpipe blind end does not have the foreign matter to block up, first trip valve with peep hole lid subassembly links to each other, the adaptor passes through connecting line and compressed air source intercommunication, connecting line with be provided with the second trip valve between the compressed air source, connecting line with be provided with pressure detection spare and relief valve between the second trip valve, blast furnace tuyere blowpipe blind end foreign matter online cleaning method includes:
s1, observing whether a tuyere coal flow at the blind end of the blowpipe is visible or not;
s2, if the tuyere coal flow is invisible, judging that the blind end of the blowpipe is blocked, closing the first cut-off valve, and taking down the peep hole cover assembly;
s3, connecting the adapter with the first cut-off valve, and sequentially connecting the connecting pipeline, the second cut-off valve and the compressed air source;
s4, installing the pressure detection piece and the pressure relief valve between the connecting pipeline and the second cut-off valve, and opening the second cut-off valve to obtain an actual pressure value of the pressure detection piece;
s5, if the actual pressure value is greater than or equal to a preset pressure value, opening the first cut-off valve;
s6, after waiting for a preset time, closing the first cut-off valve and opening the pressure relief valve;
s7, removing the adapter piece and reinstalling the peep hole cover assembly.
Optionally, after step S7, the method further includes:
s8, opening the first cut-off valve, and checking whether air leakage exists at the periphery of the peep hole cover assembly or not;
s9, if no air leakage exists at the periphery of the peeping hole cover assembly, further observing whether the air port coal flow at the blind end of the blowpipe is visible or not;
s10, if the tuyere coal flow is clearly visible, cleaning up foreign matters at the blind end of the blowpipe.
Optionally, after step S8, the method further includes:
and if the air leaks out from the periphery of the peephole cover assembly, closing the first cut-off valve, removing the peephole cover assembly, and reinstalling and checking.
Optionally, the preset pressure value is 1MPa.
Optionally, the preset time is 5-10min.
Optionally, the adaptor includes threaded connection section, changeover portion and pipeline link, threaded connection section the changeover portion with pipeline link is followed and is kept away from the orificial direction in first cut-off valve low reaches connects gradually, set up the air vent in the adaptor, the air vent runs through threaded connection section the changeover portion with pipeline link.
Optionally, the outer surface of the pipeline connecting section is provided with an arc-shaped protruding part, and the pipeline connecting section is detachably connected with the connecting pipeline through the arc-shaped protruding part.
Optionally, the arcuate projection of the pipe connection segment is in interference fit with an end of the connection pipe.
Optionally, the peeping hole cover assembly comprises a connecting nut and a transparent cover plate, wherein the connecting nut is in threaded connection with one side of the first cut-off valve, which is away from the blind end of the blowpipe, and the transparent cover plate is in butt connection with one side end surface of the connecting nut, which is away from the first cut-off valve, so that the through hole of the connecting nut is blocked.
Optionally, the peeping hole cover assembly further comprises a gland flange, the gland flange is connected to one side, away from the first cut-off valve, of the connecting nut, so that the transparent cover plate is pressed on the connecting nut, and an observation hole is formed in the gland flange corresponding to the transparent cover plate.
The invention has the beneficial effects that:
the invention provides an online cleaning method for foreign matters at the blind end of a blast furnace tuyere blowpipe, which is used for cleaning the foreign matters at the blind end of the blowpipe and comprises the following steps: s1, observing whether a tuyere coal flow at the blind end of a blowpipe is visible or not; s2, if the coal flow at the air port is invisible, judging that the blind end of the blowpipe is blocked, closing the first cut-off valve, and taking down the peep hole cover assembly; s3, connecting the adapter with the first cut-off valve, and sequentially connecting the connecting pipeline, the second cut-off valve and the compressed air source; s4, installing a pressure detection part and a pressure relief valve between the connecting pipeline and the second cut-off valve, and opening the second cut-off valve to obtain an actual pressure value of the pressure detection part; s5, if the actual pressure value is greater than or equal to a preset pressure value, opening a first cut-off valve; s6, after waiting for preset time, closing the first cut-off valve and opening the pressure release valve; s7, removing the adapter piece and reinstalling the peep hole cover assembly. That is, when the blind end of the blowpipe is observed to be blocked through the peeping hole cover assembly and foreign matters need to be cleaned, the first cut-off valve is closed, the peeping hole cover assembly is replaced by the adapter, the adapter is connected to the compressed air source through the connecting pipeline, then the second cut-off valve is opened, when the pressure of compressed air in the connecting pipeline is greater than the wind pressure of the blast furnace air inlet system, the first cut-off valve is opened, the foreign matters at the blind end of the blowpipe are reversely purged by the compressed air, and the foreign matters are blown back into the furnace. The method solves the problems that the peeping hole is drilled by a large hammer or steel chisel to clean foreign matters, the foreign matters are easy to scald or the slag particles are damaged by high-pressure hot air blowing, effectively reduces the labor intensity of operators, and eliminates the hidden trouble of safe production. Meanwhile, the problems of equipment service life reduction and blast furnace damping down cooperation treatment caused by incapability of monitoring an air inlet system and an air inlet coal flow due to foreign matters are solved, the service life of the equipment is prolonged, and the running reliability of the equipment is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following description will briefly explain the drawings needed in the description of the embodiments of the present invention, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the contents of the embodiments of the present invention and these drawings without inventive effort for those skilled in the art.
FIG. 1 is a flow chart of a method for cleaning foreign matters at the blind end of a blast furnace tuyere lance on line, which is provided by an embodiment of the invention;
FIG. 2 is a schematic diagram of a blind end connection structure of a blast furnace tuyere lance provided by an embodiment of the present invention;
FIG. 3 is a flowchart of an embodiment of a method for cleaning foreign matters on a blind end of a blast furnace tuyere lance according to an embodiment of the present invention.
In the figure:
1. a blind end of the blow tube; 2. a first shut-off valve; 3. an adapter; 4. a connecting pipeline; 5. a second shut-off valve; 6. a pressure release valve; 7. a pressure detecting member.
Detailed Description
The technical scheme of the invention is further described below by the specific embodiments with reference to the accompanying drawings.
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be configured and operated in a specific direction, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed", "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected or integrally connected; either mechanically or electrically. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
As shown in fig. 1 and 2, the present embodiment provides an online cleaning method for foreign matters at the blind end of a blast furnace tuyere lance, which is mainly used for cleaning the foreign matters in the blind end 1 of the lance.
Specifically, as shown in fig. 2, the blind end 1 of the blowpipe is connected to one end of a first cut-off valve 2, the other end of the first cut-off valve 2 is alternatively detachably connected with a peeping hole cover assembly or an adapter 3, the adapter 3 is communicated with a compressed air source through a connecting pipeline 4, a second cut-off valve 5 is arranged between the connecting pipeline 4 and the compressed air source, and a pressure detection part 7 and a pressure relief valve 6 are arranged between the connecting pipeline 4 and the second cut-off valve 5.
It will be appreciated that the first shut-off valve 2 is connected to the peephole cap assembly when the blind end 1 of the lance tube is free of foreign object obstruction. So that an operator can observe the flow condition of the tuyere coal flow in real time through the peeping hole cover assembly.
As shown in fig. 1 and 3, the method for cleaning foreign matters at the blind end of a blast furnace tuyere lance provided in this embodiment specifically includes the following steps:
s1, observing whether the tuyere coal flow of the blind end 1 of the blowpipe is visible.
Specifically, an operator can observe the definition degree of the tuyere coal flow of the blowpipe blind end 1 through the peeping hole cover assembly, and then judge whether the blowpipe blind end 1 has foreign matters and how much.
S2, if the coal flow at the air port is invisible, judging that the blind end 1 of the blowpipe is blocked, closing the first cut-off valve 2, and taking down the peephole cover assembly.
Specifically, when the blind end 1 of the blowpipe is blocked, the first cut-off valve 2 is closed, so that the communication between the blowpipe and the inner cavity of the blast furnace can be cut off, and the overflow of high-temperature gas in the furnace is prevented, thereby causing personnel injury accidents.
And S3, connecting the adapter 3 with the first cut-off valve 2, and sequentially connecting the connecting pipeline 4, the second cut-off valve 5 and the compressed air source.
And S4, installing a pressure detection piece 7 and a pressure relief valve 6 between the connecting pipeline 4 and the second cut-off valve 5, and opening the second cut-off valve 5 to obtain an actual pressure value of the pressure detection piece 7.
In the present embodiment, the pressure detecting member 7 may be selected from a pressure gauge in the related art.
And S5, if the actual pressure value is greater than or equal to the preset pressure value, opening the first cut-off valve 2.
Alternatively, the preset pressure value is 1MPa.
And S6, after waiting for the preset time, closing the first cut-off valve 2 and opening the pressure release valve 6.
Optionally, the preset time is 5-10min.
S7, removing the adapter 3 and reinstalling the peep hole cover assembly.
Optionally, after step S7, the method further includes:
s8, opening the first cut-off valve 2, and checking whether air leaks out from the periphery of the peep hole cover assembly.
And S9, if no air leakage exists at the peripheral side of the peeping hole cover assembly, further observing whether the air port coal flow of the blind end 1 of the blowpipe is visible. If the air leaks from the peripheral side of the peephole cover assembly, the first shutoff valve 2 is closed, the peephole cover assembly is removed, and the peephole cover assembly is reinstalled and inspected.
S10, if the coal flow at the tuyere is clearly visible, cleaning up the foreign matters at the blind end 1 of the blowpipe.
That is, when the blind end 1 of the lance tube is observed to be blocked by the peeping hole cover assembly and foreign matters need to be cleaned, first, the first shut-off valve 2 is closed, the peeping hole cover assembly is replaced by the adapter 3, after the adapter 3 is connected to a compressed air source through the connecting pipeline 4, the second shut-off valve 5 is opened, when the pressure of the compressed air in the connecting pipeline 4 is greater than the wind pressure of the blast furnace air intake system, the first shut-off valve 2 is opened, and the foreign matters in the blind end 1 of the lance tube are reversely purged by the compressed air and blown back into the furnace. The method solves the problems that the peeping hole is drilled by a large hammer or steel chisel to clean foreign matters, the foreign matters are easy to scald or the slag particles are damaged by high-pressure hot air blowing, effectively reduces the labor intensity of operators, and eliminates the hidden trouble of safe production. Meanwhile, the problems of equipment service life reduction and blast furnace damping down cooperation treatment caused by incapability of monitoring an air inlet system and an air inlet coal flow due to foreign matters are solved, the service life of the equipment is prolonged, and the running reliability of the equipment is improved.
Optionally, in the present embodiment, the adapter 3 comprises a threaded connection section, a transition section and a pipe connection section. The threaded connection section, the transition section and the pipeline connection section are sequentially connected along the direction away from the downstream pipe orifice of the first cut-off valve 2, the air vent is formed in the adapter 3, and the air vent penetrates through the threaded connection section, the transition section and the pipeline connection section. The purge gas of the compressed gas source is blown into the blind end 1 of the blowpipe through the connecting section, the transition section and the threaded connecting section.
Specifically, the outer surface of the pipeline connecting section is provided with an arc-shaped protruding part, and the pipeline connecting section is detachably connected with the connecting pipeline 4 through the arc-shaped protruding part.
And in particular, the arc-shaped protruding part of the pipeline connecting section is in interference fit with the end part of the connecting pipeline 4 so as to ensure the reliability and the safety when the pipeline connecting section is connected with the connecting pipeline 4.
More specifically, the outer surface of the transition section is provided with a plurality of edges, and the connecting piece 3 and the first cut-off valve 2 can be connected or disconnected by clamping a spanner or a related tool on the edges of the outer surface of the transition section.
Optionally, the peephole cover assembly comprises a coupling nut and a transparent cover plate. The connecting nut is in threaded connection with one side of the first cut-off valve 2, which is away from the blind end 1 of the blowpipe, and the transparent cover plate is in butt connection with one side end surface of the connecting nut, which is away from the first cut-off valve 2, so that the through hole of the connecting nut is plugged. The diameter of the transparent cover plate is larger than that of the through hole of the connecting nut.
Specifically, the peephole cap assembly further comprises a gland flange. The gland flange is connected to one side of the connecting nut, which is far away from the first cut-off valve 2, so that the transparent cover plate is pressed on the connecting nut, and an observation hole is formed in the gland flange, which corresponds to the transparent cover plate. The diameter of the observation hole is smaller than that of the transparent cover plate.
In the present embodiment, the threaded connection section and the connection nut are both internally provided with internal threads, and the pipe orifice of the first cut-off valve 2 facing away from the blind end 1 of the blowpipe is provided with external threads. The threaded connection section and the connection nut are detachably connected with the first cut-off valve 2 through threaded connection of the internal threads and the external threads respectively. Of course, in other embodiments, the threaded connection section and the connection nut may be detachably connected to the first cut-off valve 2 by a snap connection or the like, which is not limited herein.
It is to be understood that the above examples of the present invention are provided for clarity of illustration only and are not limiting of the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.
Claims (10)
1. The utility model provides a blast furnace tuyere blowpipe blind end foreign matter online cleaning method which is characterized in that is used for clearing up the foreign matter of blowpipe blind end (1), blowpipe blind end (1) is connected in the one end of first trip valve (2), the other end of first trip valve (2) is selected one and is dismantled and be connected with peep hole lid subassembly or adaptor (3), when blowpipe blind end (1) does not have the foreign matter to block up, first trip valve (2) with peep hole lid subassembly links to each other, adaptor (3) are through connecting line (4) and compressed air source intercommunication, connecting line (4) with be provided with second trip valve (5) between the compressed air source, connecting line (4) with be provided with pressure detection spare (7) and relief valve (6) between second trip valve (5), blast furnace tuyere blowpipe blind end foreign matter online cleaning method includes:
s1, observing whether a tuyere coal flow of a blind end (1) of the blowpipe is visible or not;
s2, if the tuyere coal flow is invisible, judging that the blowpipe blind end (1) is blocked, closing the first cut-off valve (2), and taking down the peep hole cover assembly;
s3, connecting the adapter (3) with the first cut-off valve (2), and sequentially connecting the connecting pipeline (4), the second cut-off valve (5) and the compressed air source;
s4, installing the pressure detection piece (7) and the pressure relief valve (6) between the connecting pipeline (4) and the second cut-off valve (5), and opening the second cut-off valve (5) to obtain an actual pressure value of the pressure detection piece (7);
s5, if the actual pressure value is greater than or equal to a preset pressure value, opening the first cut-off valve (2);
s6, after waiting for a preset time, closing the first cut-off valve (2) and opening the pressure relief valve (6);
s7, removing the adapter piece (3) and reinstalling the peep hole cover assembly.
2. The method for on-line cleaning of foreign matter at a blind end of a blast furnace tuyere lance according to claim 1, further comprising, after step S7:
s8, opening the first cut-off valve (2) and checking whether air leaks out from the periphery of the peep hole cover assembly;
s9, if no air leakage exists at the periphery of the peeping hole cover assembly, further observing whether the tuyere coal flow of the blowpipe blind end (1) is visible or not;
s10, if the tuyere coal flow is clearly visible, cleaning up foreign matters at the blind end (1) of the blowpipe.
3. The method for on-line cleaning of foreign matter at a blind end of a blast furnace tuyere lance according to claim 2, further comprising, after step S8:
if the air leaks out from the periphery of the peephole cover assembly, the first cut-off valve (2) is closed, the peephole cover assembly is removed, and the peephole cover assembly is installed again and checked.
4. The method for cleaning foreign matters on the blind end of a blast furnace tuyere lance tube according to claim 1, wherein the preset pressure value is 1MPa.
5. The method for cleaning foreign matters on the blind end of a blast furnace tuyere lance tube according to claim 1, wherein the preset time is 5-10min.
6. The method for cleaning foreign matters on the blind end of the blast furnace tuyere lance tube on line according to claim 1, wherein the adaptor (3) comprises a threaded connection section, a transition section and a pipeline connection section, the threaded connection section, the transition section and the pipeline connection section are sequentially connected along a direction away from a downstream pipe orifice of the first cut-off valve (2), a vent hole is formed in the adaptor (3), and the vent hole penetrates through the threaded connection section, the transition section and the pipeline connection section.
7. The method for cleaning foreign matters on the blind end of the blast furnace tuyere lance tube according to claim 6, wherein the outer surface of the pipeline connecting section is provided with an arc-shaped protruding part, and the pipeline connecting section is detachably connected with the connecting pipeline (4) through the arc-shaped protruding part.
8. The method for cleaning foreign matters on the blind end of a blast furnace tuyere lance according to claim 7, wherein the arc-shaped protruding portion of the pipe connecting section is in interference fit with the end portion of the connecting pipe (4).
9. The method for cleaning foreign matters on the blind end of the blast furnace tuyere lance tube according to any one of claims 1 to 8, wherein the peeping hole cover assembly comprises a connecting nut and a transparent cover plate, the connecting nut is in threaded connection with one side of the first cut-off valve (2) away from the blind end (1) of the lance tube, and the transparent cover plate is in butt connection with one side end surface of the connecting nut away from the first cut-off valve (2) to seal the through hole of the connecting nut.
10. The method for cleaning foreign matters on the blind end of the blast furnace tuyere lance according to claim 9, wherein the peeping hole cover assembly further comprises a gland flange, the gland flange is connected to one side of the connecting nut, which is away from the first cut-off valve (2), so as to press the transparent cover plate onto the connecting nut, and an observation hole is formed in the gland flange corresponding to the transparent cover plate.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311624680.XA CN117587179A (en) | 2023-11-29 | 2023-11-29 | Online cleaning method for foreign matters at blind end of blast furnace tuyere blow tube |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311624680.XA CN117587179A (en) | 2023-11-29 | 2023-11-29 | Online cleaning method for foreign matters at blind end of blast furnace tuyere blow tube |
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| CN202311624680.XA Pending CN117587179A (en) | 2023-11-29 | 2023-11-29 | Online cleaning method for foreign matters at blind end of blast furnace tuyere blow tube |
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