CN116179789A - Three-time dust removal end system of converter - Google Patents
Three-time dust removal end system of converter Download PDFInfo
- Publication number
- CN116179789A CN116179789A CN202310171648.4A CN202310171648A CN116179789A CN 116179789 A CN116179789 A CN 116179789A CN 202310171648 A CN202310171648 A CN 202310171648A CN 116179789 A CN116179789 A CN 116179789A
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- converter
- cross
- roof
- dust removal
- hood
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- 239000000428 dust Substances 0.000 title claims abstract description 224
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 88
- 239000003546 flue gas Substances 0.000 claims abstract description 88
- 238000007789 sealing Methods 0.000 claims abstract description 29
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 66
- 239000001301 oxygen Substances 0.000 claims description 66
- 229910052760 oxygen Inorganic materials 0.000 claims description 66
- 230000007246 mechanism Effects 0.000 claims description 32
- 238000005192 partition Methods 0.000 claims 2
- 238000000034 method Methods 0.000 abstract description 6
- 238000005272 metallurgy Methods 0.000 abstract description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 18
- 239000000779 smoke Substances 0.000 description 11
- 229910052742 iron Inorganic materials 0.000 description 9
- 229910000831 Steel Inorganic materials 0.000 description 8
- 239000010959 steel Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 238000007599 discharging Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000005453 pelletization Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
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Classifications
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- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention discloses a converter tertiary dust removal end system, which relates to the technical field of metallurgy and comprises: a converter spans a house; the converter is arranged in the converter cross room, and the converter is arranged in the converter sealing cover; a charging cross-room connected with the converter cross-room; the crown block and the charging cross-house roof dust hood are arranged in the charging cross-house; the converter sealing cover is provided with a charging port facing the crown block, and the charging cross-roof dust hood is positioned above the crown block; the lower end of the flue gas separator is connected to the converter airtight cover, and the upper end of the flue gas separator is connected to the feeding cross-roof dust hood so as to isolate the region below the feeding cross-roof dust hood in the feeding cross-roof from the region above the converter airtight cover in the converter cross-roof. The method and the device can solve the problem that the flue gas diffuses and pollutes each layer of platform after the converter sealing cover escapes.
Description
Technical Field
The invention relates to the technical field of metallurgy, in particular to a converter tertiary dust removal end system.
Background
The implementation of ultra-low emission is one of important measures for protecting blue sky and is also one of main driving forces for the healthy development of the steel industry. The environmental protection problem is scientifically solved, the energy-saving emission-reducing environment-friendly industrial industry is constructed, and the pollution control technology suitable for the process production is developed.
The converter takes molten iron and scrap steel as main raw materials, does not use external energy sources, and utilizes the physical heat of molten iron and the heat generated by chemical reaction between molten iron components to finish the steelmaking process in the converter, and has the characteristics of high production speed, high yield, high single-furnace yield and the like. The converter can produce a large amount of smoke dust in the processes of adding molten iron, adding scrap steel, converting and discharging molten steel, and the smoke dust needs to be collected and treated so as to avoid environmental pollution. When the converter charging bay finishes the operations of adding molten iron and scrap steel, a large amount of smoke can escape from the secondary dust hood opening of the converter, and the converter tertiary dust removal system is used for capturing the part of smoke.
The oxygen lance of the converter is positioned on the furnace span, and in the converting process of the converter, a large amount of oxygen is blown by the oxygen lance to ensure that the reaction in the converter is severe, although the oxygen lance opening is provided with nitrogen seal or steam seal, the flue gas can not be completely sealed, the flue gas escapes to pollute the environment, the escaped flue gas carries carbon monoxide and is harmful to the health of personnel, and the method is a major potential safety hazard. Because the converter workshop is a thermal production workshop, the indoor temperature gradient is large, the flue gas escaping from the secondary dust hood of the converter rises rapidly and diffuses, the concentration of the flue gas is greatly reduced when reaching the roof height, the flue gas is collected through the tertiary dust hood at the moment, the large exhaust air quantity is needed, the corresponding dust remover and the fan energy consumption is high, and the operation burden of environmental protection facilities can be greatly increased. In addition, the oxygen lance mouth is far away from the three dust hoods of the converter furnace crossing the roof, and the flue gas escaping from the oxygen lance mouth is firstly diffused to the converter furnace crossing each layer of platform, and when the flue gas reaches the lower part of the roof, the environment of each layer of platform is polluted by the flue gas, so that the process mode of the roof dust hood has certain defects.
Disclosure of Invention
In order to overcome the defects in the prior art, the technical problem to be solved by the embodiment of the invention is to provide a converter tertiary dust removal tail end system which can solve the problem that flue gas diffuses and pollutes each layer of platform after a converter sealed cover escapes.
The specific technical scheme of the embodiment of the invention is as follows:
a converter tertiary dedusting end system, the converter tertiary dedusting end system comprising:
a converter spans a house; the converter is arranged in the converter cross room, and the converter is arranged in the converter sealing cover;
a charging cross-room connected with the converter cross-room; the crown block and the charging cross-house roof dust hood are arranged in the charging cross-house; the converter sealing cover is provided with a charging port facing the crown block, and the charging cross-roof dust hood is positioned above the crown block;
the lower end of the flue gas separator is connected to the converter airtight cover, and the upper end of the flue gas separator is connected to the feeding cross-roof dust hood so as to isolate the region below the feeding cross-roof dust hood in the feeding cross-roof from the region above the converter airtight cover in the converter cross-roof.
Preferably, the converter cross-room comprises a first side face, a second side face and a first roof face which are opposite, wherein the first side face is provided with a connecting notch; the charging cross-room comprises a second roof surface and a plurality of third side surfaces, and the second roof surface and the third side surfaces are connected at the connecting notch of the first side surfaces so that the converter cross-room and the charging cross-room are integrated; the second roof surface is lower than the first roof surface in height; the converter airtight cover is arranged on one side close to the connecting notch and is positioned right above the charging port, the crown block extends along the direction vertical to the first side face, and one end of the crown block extends to the notch of the first side face and the position right above the charging port.
Preferably, the converter sealing cover is provided with an upper end face, the flue gas separator extends along the vertical direction, and the lower end of the flue gas separator is connected to one end of the upper end face of the converter sealing cover, which is close to the charging port; the cross section of the suction inlet of the feeding cross-roof dust hood in the horizontal direction is rectangular, and the upper end of the flue gas separator is connected to the edge, close to the second side surface, of the suction inlet of the feeding cross-roof dust hood.
Preferably, a converter cross-roof dust hood is arranged on a first roof surface of the converter cross-roof, and the charging cross-roof dust hood is connected to a tertiary dust collection main pipeline through a first pipeline; the converter cross-roof dust hood is connected to the tertiary dust removal main pipeline through a second pipeline; the first pipeline is provided with a first dust removal valve, and the second pipeline is provided with a second dust removal valve.
Preferably, a converter secondary air suction mechanism is arranged in the converter closed cover, and the converter secondary air suction mechanism is positioned above the converter and is close to the charging port; the converter can rotate around a first rotating shaft in a first rotating surface so as to enable the converter to face the charging port; the converter secondary air suction mechanism comprises an air suction groove body extending along the first rotating shaft direction, wherein a first air suction groove and a second air suction groove which extend downwards and are parallel are formed in the air suction groove body, the first air suction groove and the second air suction groove are communicated with the air suction groove body, the first air suction groove and the second air suction groove are respectively positioned at two sides of the first rotating surface, an air suction opening facing downwards is formed in the air suction groove body, and an air suction opening facing towards the first rotating surface is formed in the first air suction groove and the second air suction groove respectively; and two ends of the air suction groove body are connected with a secondary dust removing main pipe.
Preferably, the converter tertiary dust removal end system further comprises:
an oxygen lance inserted into the converter sealing cover along the vertical direction, wherein a gap exists between the oxygen lance and the converter sealing cover;
the oxygen lance dust hood is positioned outside the converter closed hood, the suction inlet of the oxygen lance dust hood is positioned near the upper part of a gap between the oxygen lance and the converter closed hood, and the oxygen lance dust hood is connected with the tertiary dust removal main pipeline through a third pipeline.
Preferably, the number of the oxygen lance dust hoods is two, the two oxygen lance dust hoods are oppositely arranged at two sides of the oxygen lance, and the suction inlets of the two oxygen lance dust hoods are positioned at two sides of the oxygen lance and face the oxygen lance; each oxygen lance dust hood is provided with a third pipeline corresponding to the oxygen lance dust hood, and a third dust removal valve is arranged on each third pipeline.
Preferably, the converter tertiary dust removal end system further comprises:
the suction inlet of the furnace mouth dust hood is positioned on the flue gas separator and is close to the feed inlet;
the suction inlet of the furnace mouth dust hood faces one side of the crown block.
Preferably, the suction inlet of the furnace mouth dust hood extends along the first rotation axis direction, the furnace mouth dust hood is connected with the tertiary dust collection main pipeline through a fourth pipeline, part of the fourth pipeline extends along the first rotation axis direction, the furnace mouth dust hood is connected to the side wall of the fourth pipeline extending along the first rotation axis direction, two ends of the fourth pipeline extending along the first rotation axis direction are connected with the tertiary dust collection main pipeline, and two ends of the fourth pipeline extending along the first rotation axis direction are respectively provided with a fourth dust collection valve.
Preferably, a movable closing door capable of realizing opening or closing of the charging opening is arranged at the charging opening; a tilting mechanism for realizing tilting of the converter is arranged in the converter closed cover; the tipping mechanism is connected with the movable closed door in a locking way, and when the tipping mechanism tips the converter, the movable closed door is opened; the movable closing door is closed when the tilting mechanism does not tilt the converter.
The technical scheme of the invention has the following remarkable beneficial effects:
1. utilize the flue gas separator will in the reinforced room of striding the reinforced room roof dust excluding hood below the region with the converter is striden in the room the region above the airtight cover of converter is kept apart, effectively prevents flue gas to the converter and strides indoor escape, on this basis, after the flue gas from the charge door escape of airtight cover of converter, is inhaled by the fire door dust excluding hood of top rapidly to reduce the flue gas escape to the reinforced flue gas volume of striding the room roofing, effectively reduced the burden of striding the room roof dust excluding hood of reinforced, the whole set of system can realize better dust removal effect.
2. The flue gas escaping from the oxygen lance can be complemented before being completely diffused through the oxygen lance dust hood, so that the flue gas escaping to the converter span house and the flue gas diffusing to the converter span house roof are reduced, and the burden of the converter span house roof dust hood is greatly reduced.
3. The converter tertiary dust removal tail end system realizes that flue gas is effectively trapped near a release source, reduces the operation load of the converter cross-roof dust hood and the charging cross-roof dust hood, can achieve good dust removal effect even if the converter cross-roof dust hood and the charging cross-roof dust hood use smaller exhaust amount, can save the construction cost of a dust removal system, saves the operation energy consumption of a dust removal fan, and has more advantages than the conventional tertiary dust removal mode.
Specific embodiments of the invention are disclosed in detail below with reference to the following description and drawings, indicating the manner in which the principles of the invention may be employed. It should be understood that the embodiments of the invention are not limited in scope thereby. Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments in combination with or instead of the features of the other embodiments.
Drawings
The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, proportional sizes, and the like of the respective components in the drawings are merely illustrative for aiding in understanding the present invention, and are not particularly limited. Those skilled in the art with access to the teachings of the present invention can select a variety of possible shapes and scale sizes to practice the present invention as the case may be.
FIG. 1 is a schematic diagram of a system for removing dust from a third dust end of a rotary kiln according to an embodiment of the present invention;
FIG. 2 is a top view of an oxygen lance dust hood and a furnace mouth dust hood in an embodiment of the invention;
FIG. 3 is a left side view of a furnace mouth dust hood and a converter secondary air suction mechanism in an embodiment of the invention;
fig. 4 is a schematic structural diagram of a converter tertiary dust removal end system with a converter secondary air suction mechanism in an embodiment of the invention.
Reference numerals of the above drawings:
1. a converter spans a house; 11. a first side; 12. a second side; 13. a first roof surface; 14. a connection notch; 2. a converter sealing cover; 21. a feed inlet; 22. a converter secondary air suction mechanism; 221. an air suction groove body; 222. a first suction groove; 223. a second suction groove; 3. a converter; 4. feeding across a house; 41. a second roof surface; 42. a third side; 5. a crown block; 6. a charging cross-roof dust hood; 61. a first pipe; 62. a first dust removal valve; 7. a flue gas separator; 8. a converter roof-crossing dust hood; 81. a second pipe; 82. a second dust removal valve; 9. a primary dust removing pipeline for three times; 15. an oxygen lance; 16. an oxygen lance dust hood; 161. a third conduit; 162. a third dust removal valve; 17. a furnace mouth dust hood; 171. a fourth conduit; 172. and a fourth dust removing valve.
Detailed Description
The details of the invention will be more clearly understood in conjunction with the accompanying drawings and description of specific embodiments of the invention. However, the specific embodiments of the invention described herein are for the purpose of illustration only and are not to be construed as limiting the invention in any way. Given the teachings of the present invention, one of ordinary skill in the related art will contemplate any possible modification based on the present invention, and such should be considered to be within the scope of the present invention. It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "mounted," "connected," "coupled," and "connected" are to be construed broadly, and may be, for example, mechanically or electrically connected, may be in communication with each other in two elements, may be directly connected, or may be indirectly connected through an intermediary, and the specific meaning of the terms may be understood by those of ordinary skill in the art in view of the specific circumstances. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
In order to solve the problem that the flue gas diffuses and pollutes each layer of platform after escaping from the converter enclosure 2, a converter tertiary dust removal end system is provided in the present application, fig. 1 is a schematic structural diagram of the converter tertiary dust removal end system in the embodiment of the present invention, and as shown in fig. 1, the converter tertiary dust removal end system may include: a converter cross-room 1; a converter 3 and a converter enclosure 2 arranged in the converter span house 1, wherein the converter 3 is positioned in the converter enclosure 2; a charging cross-room 4 connected with the converter cross-room 1; the crown block 5 is arranged in the charging cross-room 4, and the charging cross-room roof dust hood 6; the converter sealing cover 2 is provided with a charging port 21 facing the crown block 5, and a charging cross-roof dust hood 6 is positioned above the crown block 5; the lower end of the flue gas separation piece 7 is connected to the converter airtight cover 2, and the upper end of the flue gas separation piece 7 is connected to the charging cross-roof dust hood 6 so as to isolate the region below the charging cross-roof dust hood 6 in the charging cross-roof 4 from the region above the converter airtight cover 2 in the converter cross-roof 1.
As shown in fig. 1, a converter 3 and a converter enclosure 2 are provided in a converter bay 1, and the converter 3 is located in the converter enclosure 2. The charging cross-room 4 is provided with a crown block 5 and a charging cross-room roof dust hood 6. Wherein the charging cross-room 4 is connected with the converter cross-room 1. The converter span 1 comprises a first side 11 and a second side 12 opposite each other, a first roof surface 13. The first roof surface 13 connects the upper ends of the first side 11 and the second side 12. The first side 11 has a connection notch 14, which connection notch 14 is adapted to connect with the charging bay 4 to communicate the interior of the converter bay 1 and the charging bay 4.
As shown in fig. 1, the charging cross-room 4 may include a second roof surface 41 and a plurality of third side surfaces 42, and the second roof surface 41 and the plurality of third side surfaces 42 are connected at the connection notch 14 of the first side surface 11, so that the converter cross-room 1 and the charging cross-room 4 are integrated. The second roof surface 41 is lower in height than the first roof surface 13.
As shown in fig. 1, the converter closure 2 has a charging port 21 facing the crown block 5, and the charging cross-roof dust hood 6 is located above the crown block 5. The rotary kiln 3 is rotatable about a first axis of rotation in a first plane of rotation to orient itself towards the charging opening 21. When the converter 3 is charged with iron or scrap, the converter 3 is turned to the charging cross-house 4 side, namely the charging opening 21 of the converter closure 2, and the converter 3 maintains a certain inclination angle, during which the flue gas generated by the converter 3 can escape from the charging opening 21 of the converter closure 2 in a large amount in a short time. The crown block 5 generally extends along the direction perpendicular to the first side 11 and the second side 12, and one end of the crown block 5 extends to the notch of the first side 11 and the position right above the charging hole 21, so that the crown block 5 can conveniently pour iron or scrap steel and the like in the suspended container into the converter 3 through the charging hole 21 of the converter sealing cover 2. Similarly, as far as possible, the converter enclosure 2 is located on the side close to the charging cross-house 4.
As shown in fig. 1, the overhead travelling crane 5 is blocked, and there is no space below the overhead travelling crane 5, so that the charging cross-roof dust hood 6 can only be provided between the second roof 41 of the charging cross-roof 4 and the overhead travelling crane 5, and a large amount of flue gas escaping from the charging port 21 of the converter enclosure 2 can be collected to some extent by the charging cross-roof dust hood 6. Further, the converter closure 2 may be disposed on a side close to the connection notch 14 and directly above the charging port 21.
The above-described manner can only be collected when the flue gases to be escaped diffuse between the second roof surface 41 and the crown block 5. Before the flue gas to be escaped is diffused between the second roof surface 41 and the crown block 5, the flue gas escapes from between the crown block 5 and the charging port 21 of the converter sealing cover 2, so that the flue gas enters the converter cross-room 1. Thus, a flue gas separator 7 may be provided between the converter enclosure 2 and the charging roof-straddling dust hood 6, the lower end of the flue gas separator 7 being connected to the converter enclosure 2, the upper end of the flue gas separator 7 being connected to the charging roof-straddling dust hood 6. The flue gas separator 7 may be a large baffle to isolate the region of the charging bay 4 below the charging bay roof dust hood 6 from the region of the converter bay 1 above the converter enclosure 2. By the above mode, before the flue gas to be escaped is diffused between the second roof surface 41 and the crown block 5, the flue gas cannot escape from the space between the crown block 5 and the charging port 21 of the converter sealing cover 2 to enter the converter cross-room 1, most of the flue gas can only be diffused upwards, and then the flue gas is sucked and collected by the charging cross-room roof dust hood 6 at the charging cross-room roof dust hood 6.
As shown in fig. 1, the converter enclosure 2 may take on various shapes according to specific needs. The converter closure 2 has an upper end face, and the flue gas separator 7 extends along vertical direction, and the lower extreme of flue gas separator 7 is connected to the one end department that is close to charge door 21 of the upper end face of converter closure 2 through sealing connection's mode to can carry out effectual blocking to the flue gas that just escapes from converter closure 2.
As shown in fig. 1, the cross section of the suction inlet of the charging cross-roof dust hood 6 in the horizontal direction may be generally rectangular, so that the charging cross-roof dust hood has sufficient suction capacity for the flue gas escaping from the converter enclosure 2 in two perpendicular directions on the horizontal plane. The upper end of the flue gas separation piece 7 is connected to the suction inlet of the charging cross-roof dust hood 6 in a sealing connection mode, and is close to the edge of the second side 12, so that flue gas just escaping from the converter sealing hood 2 can be effectively blocked, the flue gas enters the suction inlet of the charging cross-roof dust hood 6 under the guidance of the flue gas separation piece 7, and the sucked percentage of the flue gas is improved.
As shown in fig. 1, a converter span roof dust hood 8 is arranged on the first roof surface 13 of the converter span 1, and the converter span roof dust hood 8 is connected to the tertiary dust collection main pipeline 9 through a second pipeline 81. The tertiary dedusting main pipeline 9 is positioned outside the converter span house 1 and the charging span house 4, and can be positioned above the second roof surface 41 of the charging span house 4. The converter cross-roof dust hood 8 is used for treating flue gas and the like in the converter cross-roof 1. The downstream of the three dedusting main pipeline 9 is connected with a deduster, a fan and other dedusting equipment for generating negative pressure suction. Because the flue gas components in the converter span house 1 are less, the converter span house roof dust hood 8 can meet the requirements only by smaller exhaust amount, and the power of a dust remover and a fan corresponding to the converter span house roof dust hood 8 can be smaller, so that the energy consumption is greatly reduced, and the operation burden of environmental protection facilities is lightened. In other possible embodiments, the periphery of the first roof surface 13 of the converter span 1 may be completely closed, and a dust removal pipe may be connected to the upper end of the side surface of the converter span 1, and the top of the entire converter span 1 may be used as a dust removal exhaust hood.
As shown in fig. 1, the charging cross-roof dust hood 6 is also connected to the tertiary dust collection main 9 by a first pipe 61. Correspondingly, the first duct 61 may be provided with a first dust removal valve 62, and the second duct 81 may be provided with a second dust removal valve 82. The corresponding dust removal air volume can be adjusted through a dust removal valve, and the dust removal valve can be a manual, electric, electro-hydraulic or pneumatic valve and the like, and is specifically limited in the application.
Fig. 3 is a left side view of a dust hood at a furnace mouth and a secondary air suction mechanism of a converter in an embodiment of the present invention, and fig. 4 is a schematic structural diagram of a tertiary dust removal end system of a converter with a secondary air suction mechanism of a converter in an embodiment of the present invention, as shown in fig. 3 and 4, a secondary air suction mechanism 22 of a converter is disposed in a closed cover 2 of a converter. The converter secondary air suction mechanism 22 is used for collecting and discharging flue gas generated at the mouth of the converter 3 and entering the converter closed cover 2. Further, a converter secondary air suction mechanism 22 is positioned above the converter 3 and near the charging port 21. When the converter 3 rotates around the first rotation axis in the first rotation plane to enable the converter 3 to face the charging port 21, and the overhead travelling crane 5 pours iron, steel scraps and the like in the hoisted container into the converter 3 through the charging port 21 of the converter sealing cover 2, the converter secondary air suction mechanism 22 can suck the flue gas generated from the furnace mouth of the converter 3 to a certain extent, so that the amount of the flue gas overflowing out of the converter sealing cover 2 is reduced.
As shown in fig. 3, the converter secondary air suction mechanism 22 may include an air suction groove body 221 extending along the first rotation axis direction, a first air suction groove 222 and a second air suction groove 223 extending downward and parallel are provided on the air suction groove body 221, the first air suction groove 222 and the second air suction groove 223 are communicated with the air suction groove body 221, the first air suction groove 222 and the second air suction groove 223 are respectively located at two sides of the first rotation surface, an air suction opening facing downward is provided on the air suction groove body 221, and the first air suction groove 222 and the second air suction groove 223 are respectively provided with an air suction opening facing the first rotation surface. Through the structure, the secondary air suction mechanism 22 of the converter can suck the smoke at both sides and above the converter 3, and meanwhile, the converter 3 can not be inclined towards the charging hole 21.
Further, as shown in fig. 3, both ends of the suction slot body 221 are connected to the secondary dust collecting main pipe. Thus, the first air suction groove 222 and the second air suction groove 223 can be guaranteed to have the same negative pressure suction force, and the air suction groove body 221 has higher negative pressure suction force at different positions, so that the problem that one end is too low and the other end is too high can not occur, and the suction capacity of the flue gas at different positions is uniform. The secondary dust removing main pipe is positioned in the converter cross-room. The secondary dedusting main pipe and the tertiary dedusting main pipe are two independent systems.
Fig. 2 is a top view of the oxygen lance dust hood and the furnace mouth dust hood according to an embodiment of the present invention, and as shown in fig. 2 to 4, the converter tertiary dust removal end system may include: a dust hood 17 at the furnace mouth. The suction inlet of the furnace mouth dust hood 17 is located on the flue gas separator 7 and close to the charging mouth 21. The suction inlet of the furnace mouth dust hood 17 faces the crown block 5 side.
When the converter 3 rotates around the first rotating shaft in the first rotating surface to enable the converter 3 to face the charging port 21, the overhead travelling crane 5 pours iron, steel scraps and the like in a hung container into the converter 3 through the charging port 21 of the converter sealing cover 2, smoke just escaped from the converter sealing cover 2 just diffuses upwards from the charging port 21 of the converter sealing cover 2, and the suction inlet of the furnace mouth dust hood 17 sucks most of the smoke in the horizontal direction to collect the smoke, so that the smoke is effectively trapped near a release source, the operation load of the charging cross-roof dust hood 6 is reduced, the operation of the overhead travelling crane 5 is not influenced by the arrangement of the furnace mouth dust hood 17, and the charging of the overhead travelling crane 5 to the converter 3 is not influenced.
Specifically, the suction port of the mouth dust hood 17 extends in the first rotation axis direction, the mouth dust hood 17 is connected to the tertiary dust collection main pipe 9 through the fourth pipe 171, a part of the fourth pipe 171 extends in the first rotation axis direction, the mouth dust hood 17 is connected to the side wall of the fourth pipe 171 extending in the first rotation axis direction, both ends of the fourth pipe 171 extending in the first rotation axis direction are connected to the tertiary dust collection main pipe 9, and both ends of the fourth pipe 171 extending in the first rotation axis direction are provided with fourth dust collection valves 172, respectively. Because the furnace mouth dust hood 17 is connected to the side wall of the fourth pipeline 171, and both ends of the fourth pipeline 171 are connected to the triple dust collection main pipeline 9, the furnace mouth dust hood 17 can generate relatively uniform suction force at each position, the problem that one end is too large and the other end is too small does not occur, and excessive smoke diffusion occurs at one end with too small suction force.
As shown in fig. 1, 2 and 4, the converter tertiary dust removal end system may include: the oxygen lance 15 inserted into the converter enclosure 2 in the vertical direction, and the oxygen lance 15 can be lifted by a lifting mechanism. The lance 15 is used to introduce oxygen into the converter enclosure 2. When it is necessary to introduce oxygen into the converter enclosure 2, the lance 15 is inserted into the converter enclosure 2 in a lowered position. Since a gap exists between the oxygen lance 15 and the converter enclosure 2, after the oxygen lance 15 is inserted into the converter enclosure 2 in a descending manner, flue gas in the converter enclosure 2 overflows from the gap into the converter cross-room 1. When the lance 15 is not inserted into the converter cover 2, the opening of the converter cover 2 into which the lance 15 is inserted may be closed by another mechanism. Thus, the converter tertiary dedusting end system may also include an oxygen lance dust hood 16 located outside the converter enclosure 2. The suction port of the lance dust hood 16 is located near the upper part of the gap between the lance 15 and the converter closure 2, and the lance dust hood 16 is connected to the tertiary dust collection main pipe 9 through a third pipe 161. The flue gas overflowing from the gap is effectively trapped by the oxygen lance dust hood 16 at the first time and near the release source, and the operation load of the oxygen lance dust hood 16 is reduced. Further, the number of the oxygen lance dust hoods 16 can be two, the two oxygen lance dust hoods 16 are oppositely arranged at two sides of the oxygen lance 15, and the suction inlets of the two oxygen lance dust hoods 16 are positioned at two sides of the oxygen lance 15 and face the oxygen lance 15. Each oxygen lance dust hood 16 is provided with a third pipeline 161 corresponding to the oxygen lance dust hood 16, and a third dust removal valve 162 is arranged on each third pipeline 161. The two third pipes 161 extend in the horizontal direction and may be connected to both ends of the fourth pipe 171, respectively, and then connected to the triple dust removal main pipe 9 together through the pipes, so that the resistance of the pipes can be effectively reduced.
In order to avoid that flue gas overflows from the charging opening 21 of the converter closure 2 when adding material to the converter 3, a movable closure door is arranged at the charging opening 21, which can realize the opening or closing of the charging opening 21. A tilting mechanism for tilting the converter 3 is arranged in the converter closed cover 2. The tipping mechanism is connected with the movable closed door in a locking way, and when the tipping mechanism tips the converter 3, the movable closed door is opened; when the tilting mechanism does not tilt the converter 3, the movable closing door is closed. Similarly, a third dust removal valve 162 corresponding to the oxygen lance dust hood 16 is also connected with a lifting mechanism for lifting the oxygen lance 15. When the oxygen lance 15 is inserted into the converter closed cover 2 for converting by descending through the lifting mechanism, the third dust removal valve 162 corresponding to the oxygen lance dust removal cover 16 is automatically opened so as to effectively capture the flue gas overflowing from the gap.
The three-time dedusting end system of the converter can firstly isolate the region below the feeding cross-roof dust hood 6 in the feeding cross-roof 4 from the region above the converter closed cover 2 in the converter cross-roof 1 through the flue gas separator 7, so that the flue gas escaping from the feeding port 21 of the converter closed cover 2 is more difficult to enter the region above the converter closed cover 2; secondly, simultaneously, be provided with the reinforced house roof dust excluding hood 6 of striding towards the below and be provided with the mouth dust excluding hood 17 of striding one side towards the reinforced near feed inlet 21 department in the top of charge door 21, be provided with the oxygen rifle dust excluding hood 16 of orientation oxygen rifle in the oxygen rifle 15 department of converter enclosure 2, thereby collect the flue gas that will escape from charge door 21 when not diffusing completely through the cooperation of above-mentioned three kinds of modes and flue gas separators, compare with the current technology only in the roofing setting up three dust excluding hood, various dust excluding hoods in this application are close to the pollution source more, dust removal effect is better, dust removal near can effectively reduce dust pelletizing system's cost, can reduce the design amount of wind of roofing dust excluding hood in addition, after dust removal smoke discharging overall quantity reduces, can make its investment and operation more economical. Moreover, due to the existence of the flue gas separating piece 7, the escape of flue gas to the converter span house 1 and the diffusion to the roof of the converter span house 1 can be greatly reduced, so that the charging span house roof dust hood 6 and the furnace mouth dust hood 17 can fully inhale the flue gas, and the inhaled percentage of the flue gas is effectively improved.
The converter tertiary dedusting end system in the present application may have several advantages: 1. the flue gas separator 7 is utilized to isolate the region below the charging and crossing roof dust hood 6 in the charging and crossing room 4 from the region above the converter sealing cover 2 in the converter crossing room 1, so that the flue gas is effectively prevented from escaping into the converter crossing room 1, on the basis, after escaping from the charging port 21 of the converter sealing cover 2, the flue gas is quickly sucked by the upper furnace mouth dust hood 17, so that the flue gas escaping to the roof of the charging and crossing room 4 is reduced, the burden of the charging and crossing roof dust hood 6 is effectively reduced, and the whole system can realize better dust removing effect. 2. The flue gas escaping from the oxygen lance 15 can be complemented before being completely diffused through the oxygen lance dust hood 16, so that the flue gas escaping to the converter span house 1 and the flue gas diffusing to the roof of the converter span house 1 are reduced, and the burden of the converter span house roof dust hood 8 is greatly reduced. 3. The converter tertiary dust removal tail end system realizes that flue gas is effectively trapped near a release source, reduces the operation load of the converter roof-crossing dust hood 8 and the charging roof-crossing dust hood 6, can achieve good dust removal effect even if the converter roof-crossing dust hood 8 and the charging roof-crossing dust hood use smaller exhaust amount, can save the construction cost of a dust removal system, saves the operation energy consumption of a dust removal fan, and has more advantages than the conventional tertiary dust removal mode.
All articles and references, including patent applications and publications, disclosed herein are incorporated by reference for all purposes. The term "consisting essentially of …" describing a combination shall include the identified element, ingredient, component or step as well as other elements, ingredients, components or steps that do not substantially affect the essential novel features of the combination. The use of the terms "comprises" or "comprising" to describe combinations of elements, components, or steps herein also contemplates embodiments consisting essentially of such elements, components, or steps. By using the term "may" herein, it is intended that any attribute described as "may" be included is optional. Multiple elements, components, parts or steps can be provided by a single integrated element, component, part or step. Alternatively, a single integrated element, component, part or step may be divided into separate plural elements, components, parts or steps. The disclosure of "a" or "an" to describe an element, component, section or step is not intended to exclude other elements, components, sections or steps.
In this specification, each embodiment is described in a progressive manner, and each embodiment is mainly described by differences from other embodiments, and identical and similar parts between the embodiments are all enough to be referred to each other. The above embodiments are provided to illustrate the technical concept and features of the present invention and are intended to enable those skilled in the art to understand the content of the present invention and implement the same, and are not intended to limit the scope of the present invention. All equivalent changes or modifications made in accordance with the spirit of the present invention should be construed to be included in the scope of the present invention.
Claims (10)
1. A converter tertiary dedusting end system, comprising:
a converter spans a house; the converter is arranged in the converter cross room, and the converter is arranged in the converter sealing cover;
a charging cross-room connected with the converter cross-room; the crown block and the charging cross-house roof dust hood are arranged in the charging cross-house; the converter sealing cover is provided with a charging port facing the crown block, and the charging cross-roof dust hood is positioned above the crown block;
the lower end of the flue gas separator is connected to the converter airtight cover, and the upper end of the flue gas separator is connected to the feeding cross-roof dust hood so as to isolate the region below the feeding cross-roof dust hood in the feeding cross-roof from the region above the converter airtight cover in the converter cross-roof.
2. The converter tertiary dedusting end system of claim 1, wherein the converter cross-house includes opposing first and second sides, a first roof surface, wherein the first side has a connection gap; the charging cross-room comprises a second roof surface and a plurality of third side surfaces, and the second roof surface and the third side surfaces are connected at the connecting notch of the first side surfaces so that the converter cross-room and the charging cross-room are integrated; the second roof surface is lower than the first roof surface in height; the converter airtight cover is arranged on one side close to the connecting notch and is positioned right above the charging port, the crown block extends along the direction vertical to the first side face, and one end of the crown block extends to the notch of the first side face and the position right above the charging port.
3. The converter tertiary dust removal end system of claim 2, wherein the converter enclosure has an upper end face, the flue gas partition extends in a vertical direction, and a lower end of the flue gas partition is connected to an end of the upper end face of the converter enclosure near the feed port; the cross section of the suction inlet of the feeding cross-roof dust hood in the horizontal direction is rectangular, and the upper end of the flue gas separator is connected to the edge, close to the second side surface, of the suction inlet of the feeding cross-roof dust hood.
4. A converter tertiary dust removal end system according to claim 3, wherein a converter cross-roof dust removal hood is arranged on a first roof surface of the converter cross-roof, and the charging cross-roof dust removal hood is connected to a tertiary dust removal main pipeline through a first pipeline; the converter cross-roof dust hood is connected to the tertiary dust removal main pipeline through a second pipeline; the first pipeline is provided with a first dust removal valve, and the second pipeline is provided with a second dust removal valve.
5. The converter tertiary dust removal end system according to claim 1, wherein a converter secondary air suction mechanism is arranged in the converter sealing cover and is positioned above the converter and close to the charging port; the converter can rotate around a first rotating shaft in a first rotating surface so as to enable the converter to face the charging port; the converter secondary air suction mechanism comprises an air suction groove body extending along the first rotating shaft direction, wherein a first air suction groove and a second air suction groove which extend downwards and are parallel are formed in the air suction groove body, the first air suction groove and the second air suction groove are communicated with the air suction groove body, the first air suction groove and the second air suction groove are respectively positioned at two sides of the first rotating surface, an air suction opening facing downwards is formed in the air suction groove body, and an air suction opening facing towards the first rotating surface is formed in the first air suction groove and the second air suction groove respectively; and two ends of the air suction groove body are connected with a secondary dust removing main pipe.
6. The converter tertiary dedusting end system of claim 1, further comprising:
an oxygen lance inserted into the converter sealing cover along the vertical direction, wherein a gap exists between the oxygen lance and the converter sealing cover;
the oxygen lance dust hood is positioned outside the converter closed hood, the suction inlet of the oxygen lance dust hood is positioned near the upper part of a gap between the oxygen lance and the converter closed hood, and the oxygen lance dust hood is connected with the tertiary dust removal main pipeline through a third pipeline.
7. The converter tertiary dust removal end system of claim 6, wherein the number of the oxygen lance dust removal hoods is two, the two oxygen lance dust removal hoods are oppositely arranged at two sides of the oxygen lance, and the suction inlets of the two oxygen lance dust removal hoods are positioned at two sides of the oxygen lance and face the oxygen lance; each oxygen lance dust hood is provided with a third pipeline corresponding to the oxygen lance dust hood, and a third dust removal valve is arranged on each third pipeline.
8. A converter tertiary dedusting end system as in claim 3 further comprising:
the suction inlet of the furnace mouth dust hood is positioned on the flue gas separator and is close to the feed inlet;
the suction inlet of the furnace mouth dust hood faces one side of the crown block.
9. The converter tertiary dust removal end system of claim 8, wherein the suction inlet of the furnace mouth dust removal hood extends along a first rotational axis direction, the furnace mouth dust removal hood is connected with the tertiary dust removal main pipe through a fourth pipe, a part of the fourth pipe extends along the first rotational axis direction, the furnace mouth dust removal hood is connected to the side wall of the fourth pipe extending along the first rotational axis direction, two ends of the fourth pipe extending along the first rotational axis direction are connected with the tertiary dust removal main pipe, and two ends of the fourth pipe extending along the first rotational axis direction are respectively provided with a fourth dust removal valve.
10. The converter tertiary dust removal end system according to claim 1, wherein a movable closing door capable of opening or closing the charging opening is arranged at the charging opening; a tilting mechanism for realizing tilting of the converter is arranged in the converter closed cover; the tipping mechanism is connected with the movable closed door in a locking way, and when the tipping mechanism tips the converter, the movable closed door is opened; the movable closing door is closed when the tilting mechanism does not tilt the converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310171648.4A CN116179789A (en) | 2023-02-27 | 2023-02-27 | Three-time dust removal end system of converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310171648.4A CN116179789A (en) | 2023-02-27 | 2023-02-27 | Three-time dust removal end system of converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116179789A true CN116179789A (en) | 2023-05-30 |
Family
ID=86452058
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310171648.4A Pending CN116179789A (en) | 2023-02-27 | 2023-02-27 | Three-time dust removal end system of converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116179789A (en) |
-
2023
- 2023-02-27 CN CN202310171648.4A patent/CN116179789A/en active Pending
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