CN211425086U - Flue gas hood for improving preheating temperature of scrap steel - Google Patents
Flue gas hood for improving preheating temperature of scrap steel Download PDFInfo
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- CN211425086U CN211425086U CN201922162889.4U CN201922162889U CN211425086U CN 211425086 U CN211425086 U CN 211425086U CN 201922162889 U CN201922162889 U CN 201922162889U CN 211425086 U CN211425086 U CN 211425086U
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- flue gas
- sealing
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- cover
- scrap steel
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 117
- 239000003546 flue gas Substances 0.000 title claims abstract description 117
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 66
- 239000010959 steel Substances 0.000 title claims abstract description 66
- 238000007789 sealing Methods 0.000 claims abstract description 198
- 238000001816 cooling Methods 0.000 claims description 22
- 230000002093 peripheral effect Effects 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 7
- 230000008878 coupling Effects 0.000 claims description 6
- 238000010168 coupling process Methods 0.000 claims description 6
- 238000005859 coupling reaction Methods 0.000 claims description 6
- 239000003517 fume Substances 0.000 claims description 6
- 239000011819 refractory material Substances 0.000 claims description 3
- 230000008016 vaporization Effects 0.000 claims description 2
- 238000009834 vaporization Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 10
- 230000008569 process Effects 0.000 abstract description 7
- 206010010904 Convulsion Diseases 0.000 abstract 1
- 230000036461 convulsion Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 17
- 239000000428 dust Substances 0.000 description 16
- 239000000779 smoke Substances 0.000 description 8
- 239000007789 gas Substances 0.000 description 6
- 238000009628 steelmaking Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model discloses a flue gas cover for improving scrap steel preheating temperature, include: the device comprises a flue gas hood, an exhaust hood and a connecting hood, wherein a first sealing device is arranged at the feed end of the flue gas hood, and a second sealing device is arranged at the feed end of the connecting hood; at least one of the first and second sealing devices comprises: the connecting axle, a plurality of sealing members and baffle, the connecting axle is connected on flue gas cover or connecting cover, but sealing member pivot ground cover is established on the connecting axle, the swing end of sealing member is suitable for the butt at the upper surface of scrap steel, the axial range of a plurality of sealing members along the connecting axle, the relative surface of adjacent sealing member ends the contact of supporting, the swing end of sealing member is suitable for the butt and swings at the height fluctuation of the upper surface of scrap steel and the upper surface of scrap steel, utilize sealing device can prevent that the interior high temperature flue gas of flue gas cover from taking out through the draft hood when draft hood convulsions process, and then can promote the temperature in the flue gas cover.
Description
Technical Field
The invention relates to the technical field of metallurgy equipment, in particular to a flue gas hood for improving preheating temperature of scrap steel.
Background
Converter steelmaking and electric furnace steelmaking exist in the existing metallurgical industry, the energy production of steel in China is expanded in recent years, the steel yield reaches 7 hundred million tons, and the problem of excess capacity exists. With the increase of the national environmental protection and the increasing of the policy force for going to the productivity, the steelmaking capacity of the converter is reduced, and the steelmaking capacity of the electric furnace is gradually enlarged. In the electric furnace steelmaking process, a Consteel electric furnace with a continuous charging preheating system is favored by metallurgical users due to the characteristics of scrap steel preheating, continuous steelmaking, quick pace and the like.
A great deal of dust-containing high-temperature flue gas is generated in the production of a Consteel electric furnace, the dust content in the flue gas is about 8-15g/m3, the temperature of the flue gas is up to 1200-1250 ℃, and the direct emission cannot meet the environmental protection requirement.
The scrap steel preheating section of the Consteel electric furnace is used for preheating scrap steel, a dynamic air sealing device is adopted at the end part of the preheating section, dust-containing air extracted by the dynamic air sealing device is discharged into the upper space of the electric furnace, and although the dust-containing air can be introduced into a secondary dust removal system of the electric furnace for dust removal, the difficulty in collecting the dust-containing air is increased. Meanwhile, the differential pressure control difficulty of the dynamic sealing part at the tail part of the scrap steel flue gas cover is high, air leakage is high, the primary dust removal effect of the electric furnace is influenced, a large amount of air leakage is realized, and the sensible heat and the quality of the flue gas are reduced. As for the reduction of air leakage, the methods adopted at present basically comprise two methods, one is to hang a rigid sealing plate at the end part of a smoke gas hood of an electric furnace continuous charging preheating system, and the other is to hang a flexible chain at the end part of the smoke gas hood. In the second sealing method, the chain is easily damaged due to the fact that the chain is scratched seriously by the sharp convex part of the scrap steel, and the sealing effect is not good due to the fact that large gaps exist between the chain and between the links of the same chain. Because the sealing effect is not good, the control difficulty of the pressure difference of the dynamic sealing part at the tail part of the flue gas cover is high, the air leakage is large, a large amount of air leakage is involved in the flue gas of the electric furnace, the sensible heat and the quality of the flue gas are reduced, and the waste heat recovery effect is poor.
Therefore, the key of the smoke dust removal system of the Consteel electric furnace is to reduce the difficulty of collecting dust-containing air extracted by the dynamic air sealing device and reduce the air leakage rate.
Disclosure of Invention
The invention provides a flue gas hood for improving the preheating temperature of scrap steel, aiming at solving the problem of large air leakage at the end part of a continuous feeding electric furnace, which can not only greatly reduce the air leakage problem of the continuous feeding electric furnace, but also improve the temperature in the flue gas hood and improve the preheating effect of the scrap steel.
According to the embodiment of the invention, the flue gas hood for improving the preheating temperature of the scrap steel comprises: the device comprises a flue gas hood and a connecting hood, wherein a first sealing device is arranged inside the flue gas hood and at a feed end and is connected with the flue gas hood, and a second sealing device is arranged at the feed end of the connecting hood; at least one of the first and second sealing devices comprises: the connecting shaft is connected to the flue gas cover or the connecting cover and extends along the width direction of the cover body; the sealing elements are pivotally sleeved on the connecting shaft, the swinging ends of the sealing elements are suitable for abutting against the upper surface of the scrap steel, the sealing elements are arranged along the axial direction of the connecting shaft, and the opposite surfaces of the adjacent sealing elements are in abutting contact; and the baffle is connected between the flue gas cover or the connecting cover and the rotating shaft, and the baffle and the cover body are as wide as each other.
According to one embodiment of the invention, the sealing element is formed in a fan-shaped structure freely suspended on the connecting shaft, and the thickness of the sealing element is 3 mm-200 mm.
According to one embodiment of the invention, the seal is formed as a hollow structure.
According to an embodiment of the present invention, the sealing members are each formed with a connection hole through which the connection shaft passes, and at least a part of an outer peripheral edge of the sealing member is formed in a circular arc shape that is coaxially arranged with the connection hole.
According to an embodiment of the invention, the seal further comprises: the sliding wheel is rotatably connected to the bottom of the sealing element and protrudes out of the bottom of the sealing element to be in contact with the upper surface of the scrap steel in a stopping manner.
According to one embodiment of the invention, the sum of the thicknesses of the sealing elements in the flue gas cover is equal to the width of the inner cavity of the flue gas cover, and one side surface of the sealing element at the end part of the connecting shaft is in stop contact with the inner peripheral wall of the flue gas cover; the sum of the thicknesses of the sealing elements in the connecting cover is equal to the width of an inner cavity of the connecting cover, and one side surface of the sealing element at the end part of the connecting shaft is in stop contact with the inner peripheral wall of the connecting cover.
According to one embodiment of the invention, the connection shaft is a water-cooled shaft or a vaporization-cooled shaft.
According to one embodiment of the invention, a flow guide device is arranged on the high-temperature side in the flue gas hood, the flow guide device is a flow guide body which is fixed on the top of the inner side of the flue gas hood and inclines or bends downwards along the direction of flue gas flow, and the width of the flow guide body is the same as that of the hood body.
According to one embodiment of the invention, the flow conductor is a heat-resistant steel material piece or a heat-resistant steel coated refractory material piece or a water-cooled structural member or a vaporization cooling structural member.
According to one embodiment of the invention, an exhaust hood is arranged between the smoke hood and the connecting hood.
The beneficial technical effects are as follows: according to the flue gas hood for improving the preheating temperature of the scrap steel, the first sealing device is arranged at one end, away from the feeding hole, of the flue gas hood, the second sealing device is arranged at one end, away from the electric furnace, of the connecting hood, and the first sealing device and the second sealing device are used for clamping the exhaust hood in the middle, so that high-temperature flue gas in the flue gas hood can be prevented from being extracted through the exhaust hood during the air extracting process of the exhaust hood, the temperature in the flue gas hood can be improved, and the preheating effect of the scrap steel can be improved.
In addition, utilize connecting axle and a plurality of sealing member cooperation to realize sealing to continuous feeding electric stove, simple structure not only can realize the sealed effect in the continuous feeding process, and the sealing member can take place corresponding unsteady change according to the fluctuation of scrap steel upper surface moreover, can ensure that first sealing device and second sealing device can not influence sealed effect because of the volume of scrap steel is too big or undersize in the continuous feeding process of scrap steel.
Drawings
FIG. 1 is a schematic structural diagram of a flue gas hood for increasing the preheating temperature of scrap steel according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view A-A of FIG. 1;
FIG. 3 is a schematic structural view of a seal according to an embodiment of the present invention;
FIG. 4 is a side view of the structure of FIG. 3;
FIG. 5 is a schematic structural view of a seal according to another embodiment of the present invention;
fig. 6 is a side view of the structure of fig. 5.
In the figure:
10: an electric furnace; 11: a feed inlet; 21: scrap steel;
30: a flue gas hood; 31: a flue gas outlet; 32: a first sealing device; 321: a connecting shaft; 322: a seal member; 323: a first sealing plate; 324: a second sealing plate; 325: a connecting plate; 326: a baffle plate; 327: a sliding wheel;
40: a connecting cover; 41: a second sealing device;
50: an air draft cover; 51: an air suction opening.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
A flue gas hood for increasing a preheating temperature of scrap according to an embodiment of the present invention will be described with reference to fig. 1 to 6.
According to the embodiment of the invention, the flue gas hood for improving the preheating temperature of the scrap steel comprises: flue gas cover 30, suction hood 50 and connecting cover 40, flue gas cover 30 is established on silo upper portion, and the top of flue gas cover 30 is equipped with exhanst gas outlet 31, and flue gas cover 30 feed end is equipped with first sealing device 32, is connected with flue gas cover one side that is equipped with first sealing device 32, and the top of suction hood 50 is formed with suction opening 51, links to each other with suction hood 50 feed end, is equipped with second sealing device 41 at the connecting cover 40 feed end.
At least one of the first sealing device 32 and the second sealing device 41 includes: the connecting shaft 321 is connected to the flue gas cover 30 or the connecting cover 40 and extends along the width direction of the cover body, the sealing element 322 is pivotally sleeved on the connecting shaft 321, the swinging end of the sealing element 322 is suitable for abutting against the upper surface of the scrap steel 21, the sealing elements 322 are arranged along the axial direction of the connecting shaft 321, the opposite surfaces of the adjacent sealing elements 322 are abutted against the flue gas cover 30 or the baffle 7 is connected between the connecting cover 40 and the rotating shaft 6, and the baffle 7 and the cover body are as wide as each other.
According to an embodiment of the present invention, the sealing member 322 is formed in a fan-shaped structure freely suspended on the connecting shaft 321, and the thickness of the sealing member 322 is 3mm to 200 mm.
According to one embodiment of the present invention, the sealing member 322 is formed as a hollow structure.
According to an embodiment of the present invention, the sealing members 322 are each formed with a coupling hole through which the coupling shaft 321 passes, and at least a portion of an outer circumferential edge of the sealing member 322 is formed in a circular arc shape coaxially disposed with the coupling hole.
According to an embodiment of the invention, the seal 322 further comprises: and the sliding wheel 327 is rotatably connected to the bottom of the sealing member 322, and the sliding wheel 327 protrudes out of the bottom of the sealing member 322 and stops contacting the upper surface of the scrap steel 21.
According to one embodiment of the present invention, the connection shaft 321 is a water-cooled shaft or a vaporization-cooled shaft. Thereby, the service life of the connecting shaft 321 can be improved.
According to an embodiment of the present invention, a plurality of diversion sealing devices are disposed in the flue gas cover 30, and the diversion sealing devices are located between the first sealing device 32 and the second sealing device 41, and the diversion sealing devices include: the connecting shaft 321 is connected to the flue gas cover 30 or the connecting cover 40, and extends along the width direction of the flue gas cover 30 or the connecting cover 40; the sealing elements 322 are pivotally sleeved on the connecting shaft 321, the swinging ends of the sealing elements 322 are suitable for abutting against the upper surface of the scrap steel 21, the sealing elements 322 are arranged along the axial direction of the connecting shaft 321, and the opposite surfaces of the adjacent sealing elements 322 are in abutting contact; the baffle 7 is connected between the baffle, the flue gas cover 30 or the connecting cover 40 and the rotating shaft 6, and the baffle 7 and the cover body have the same width. That is, the deflector seal is similar in construction to the first seal 32 and the second seal.
According to one embodiment of the present invention, the sealing member 322 of the diversion sealing device is a refractory steel material or a refractory steel coated refractory material or a water cooled structure or a vapor cooled structure. Thereby increasing the useful life of the seal 322.
According to one embodiment of the invention, a flue gas hood for increasing the preheating temperature of scrap steel comprises: electric stove 10, flue gas cover 30, connecting cover 40 and draft hood 50, one side of electric stove 10 has feed inlet 11, flue gas cover 30 links to each other with electric stove 10 and closes on feed inlet 11 and sets up, be equipped with the pay-off link joint that moves towards feed inlet 11 on the flue gas cover 30, the pay-off link joint is used for sending into feed inlet 11 with scrap steel 21 on the flue gas cover 30, wherein, the pay-off link joint can include two chains that extend along the length direction of flue gas cover 30 and encircle flue gas cover 30 and set up, be equipped with between the chain and extend and establish the link joint that sets up along chain length direction along flue gas cover 30 width direction, the chain drives the link joint and removes, the link joint drives scrap.
Wherein, the flue gas hood 30 is communicated with the electric furnace 10, a flue gas outlet 31 communicated with the inner cavity of the flue gas hood 30 is formed at the top of the flue gas hood 30, a first sealing device 32 is arranged at one end of the flue gas hood 30 far away from the feed inlet 11, a connecting hood 40 is arranged at the part of the flue gas hood 30 far away from the electric furnace 10, a second sealing device 41 is arranged at one end of the connecting hood 40 far away from the electric furnace 10, a suction hood 50 is arranged on the flue gas hood 30 and positioned between the flue gas hood 30 and the connecting hood 40, one end of the suction hood 50 is connected with the flue gas hood 30 in a sealing way, the other end of the suction hood 50 is connected with the connecting hood 40 in a sealing way, a suction opening 51 is formed at the top of the suction hood 50, the suction opening 51 is communicated with a suction fan, the first sealing device 32 is arranged at one end of the flue gas hood 30 far away from the feed inlet 11, a second sealing device 41 is arranged at one end of, the high-temperature flue gas in the flue gas hood 30 can be prevented from being drawn out through the air draft cover 50 during the air draft process of the air draft cover 50, the temperature in the flue gas hood 30 can be increased, and the preheating effect of the scrap steel 21 can be improved.
Further, at least one of the first sealing device 32 and the second sealing device 41 includes: the connecting shaft 321 is connected to the flue gas cover 30 or the connecting cover 40 and extends along the width direction of the flue gas cover 30, the sealing member 322 is pivotally sleeved on the connecting shaft 321, the swinging end of the sealing member 322 is suitable for abutting against the upper surface of the scrap steel 21 and the height of the upper surface of the scrap steel 21 swings in an up-and-down mode, the sealing members 322 are arranged along the axial direction of the connecting shaft 321, and the opposite surfaces of the adjacent sealing members 322 are in abutting contact.
That is to say, the sealing elements 322 are arranged along the width direction of the flue gas cover 30, the upper end of each sealing element 322 is connected to the flue gas cover 30 or the connecting cover 40, the lower end of each sealing element 322 is supported on the scrap steel 21, a sealing device arranged along the section direction of the flue gas cover 30 can be formed due to the abutting contact between the adjacent sealing elements 322, and the lower end of each sealing element 322 is correspondingly floated along the fluctuation of the scrap steel 21 due to the pivotable arrangement of the sealing elements 322, so that the sealing effect of the sealing elements 322 on the flue gas cover 30 is ensured.
According to the flue gas hood for improving the preheating temperature of the scrap steel, the first sealing device 32 and the second sealing device 41 prevent the flue gas from flowing freely between cavities of the flue gas hood, so that most of the flue gas passes through the scrap steel 21 at the lower parts of the first sealing device 32 and the second sealing device 41, the heat convection between the flue gas of the electric furnace 10 and the scrap steel 21 is enhanced, the preheating temperature of the scrap steel 21 is improved by over 100 ℃, the continuous feeding electric furnace 10 is sealed by matching the connecting shaft 321 with the plurality of sealing elements 322, the structure is simple, the sealing effect in the continuous feeding process can be realized, the sealing elements 322 can generate corresponding floating change according to the fluctuation of the upper surface of the scrap steel 21, and the sealing effect cannot be influenced by the fact that the quantity of the scrap steel 21 is too large or too small in the continuous feeding process of the first sealing device 32 and the second sealing device 41. And the lower edge of the sealing device formed by the plurality of sealing elements 322 is fitted with the curve step-shaped fitting formed by the highest points of the plurality of scrap steel 21 or materials in the section perpendicular to the advancing direction of the scrap steel 21 or materials, so that the gap between the lower edge of the sealing element and the scrap steel 21 or materials is greatly reduced, and the air leakage is reduced by 60 percent.
According to an embodiment of the present invention, the sealing member 322 is formed in a plate shape perpendicular to the connecting shaft 321, the sealing member 322 having a plate shape structure has a simple structure, and is conveniently matched with the connecting shaft 321, and when the side surfaces of the adjacent plate-shaped sealing members 322 are matched, the sealing effect is good, and air leakage between the adjacent sealing members 322 is prevented.
The sealing rigid body is gradually inclined towards the feed opening 11 from top to bottom, that is, the sealing element 322 is inclined along the conveying direction of the feeding chain plate, so that the friction force between the sealing element 322 and the feeding chain plate can be reduced, the feeding chain plate and the sealing element 322 can be prevented from colliding and being damaged, and the self-locking condition caused by the matching of the feeding chain plate and the sealing element 322 can be prevented.
Further, the thickness of the sealing member 322 is 3mm to 200mm, and the thickness of the sealing member 322 is limited to the above range, so that the sealing effect of the sealing member 322 can be improved.
According to one embodiment of the invention, the seal 322 comprises: the sealing structure comprises a first sealing plate 323, a second sealing plate 324 and a connecting plate 325, wherein the first sealing plate 323 and the second sealing plate 324 are pivotally sleeved on a connecting shaft 321, the first sealing plate 323 and the second sealing plate 324 are arranged in parallel and have the same structure, the first sealing plate 323 and the second sealing plate 324 are arranged at intervals along the axial direction of the connecting shaft 321, the surface of the first sealing plate 323, which faces away from the second sealing plate 324, is in abutting contact with the surface of the second sealing plate 324, which faces away from the first sealing plate 323, of an adjacent sealing member 322, and the connecting plate 325 is connected between the outer peripheral edge of the first sealing plate 323 and the outer peripheral edge of the second sealing plate 324.
That is, the sealing member 322 is formed in a hollow structure, and the first sealing plate 323, the second sealing plate 324 and the connection plate 325 are used to constitute the sealing member 322 in cooperation, so that the weight and material input of the sealing member 322 can be reduced, the production cost of the sealing member 322 can be reduced, and the assembly and maintenance efficiency of the sealing member 322 can be improved.
According to one embodiment of the present invention, the connection plate 325 is formed in a ring shape disposed around the first and second sealing plates 323 and 324. By the annular connecting plate 325, the steel fume can leak through the gap between the first sealing plate 323 and the second sealing plate 324, and the sealing effect of the sealing element 322 is further improved.
According to an embodiment of the present invention, each of the first sealing plate 323 and the second sealing plate 324 is formed with a connection hole through which the connection shaft 321 passes, and at least a portion of an outer circumferential edge of the first sealing plate 323 and the second sealing plate 324 is formed in a circular arc shape coaxially disposed with the connection hole. At least one of the first sealing device 32 and the second sealing device 41 further comprises: the baffle 326 extends along the axial direction of the connecting shaft 321, one side of the baffle 326 in the width direction is connected to the flue gas cover 30 or the connecting cover 40, and the other side of the baffle 326 in the width direction is in contact with the outer surface of the connecting plate 325 corresponding to the arc shape.
By arranging the circular arc structures on the first sealing plate 323 and the second sealing plate 324, when the sealing member 322 rotates relative to the connecting shaft 321, the distance between the connecting plate 325 corresponding to the circular arc structures and the connecting cover 40 or between the connecting plate 325 and the flue gas cover 30 is not changed, so that a gap between the sealing member 322 and the connecting cover 40 and a gap between the sealing member 322 and the flue gas cover 30 can be closed by using the baffle 326 with fixed size, and the flue gas is prevented from leaking through the top of the sealing member 322.
According to an embodiment of the invention, the seal 322 further comprises: the sliding wheel 327 is rotatably connected between the swing end of the first sealing plate 323 and the swing end of the second sealing plate 324, a clearance gap suitable for the sliding wheel 327 to protrude out of the outer peripheral edge of the first sealing plate 323 and the outer peripheral edge of the second sealing plate 324 is formed in the connecting plate 325, and the part of the sliding wheel 327 protruding out of the clearance gap is suitable for preventing the sliding wheel 327 from contacting the upper surface of the scrap steel 21.
The sliding wheel 327 is arranged at the bottom of the sealing element 322, the sliding wheel 327 can be arranged on the surface of the scrap steel 21 in a sliding mode, the sliding friction between the sealing element 322 and the scrap steel 21 is replaced by the rotating friction, the friction force between the sealing element 322 and the scrap steel 21 is greatly reduced, the sealing element 322 can be prevented from being damaged, and the service life of the sealing element 322 is prolonged.
According to one embodiment of the invention, the sum of the thicknesses of the sealing pieces 322 in the flue gas cover 30 is equal to the width of the inner cavity of the flue gas cover 30, and one side surface of the sealing piece 322 at the end part of the connecting shaft 321 is in stop contact with the inner circumferential wall of the flue gas cover 30; the sum of the thicknesses of the sealing members 322 in the connecting cover 40 is equal to the width of the inner cavity of the connecting cover 40, and one side surface of the sealing member 322 at the end of the connecting shaft 321 comes into contact with the inner peripheral wall of the connecting cover 40.
Therefore, the sealing effect between the two sides of the sealing element 322 and the inner peripheral wall of the smoke cover 30 or the connecting cover 40 can be ensured, and smoke is prevented from leaking out through the gap between the sealing element 322 and the inner side wall of the smoke cover 30 or the connecting cover 40.
According to an embodiment of the present invention, the flue gas outlet 31 is communicated with a cooling device, one side of the cooling device, which is back to the flue gas outlet 31, is communicated with a dust remover, one side of the dust remover, which is back to the cooling device, is communicated with an induced draft fan, and one side of the induced draft fan, which is back to the dust remover, is communicated with a chimney.
Through set up the draught fan at exhanst gas outlet 31 and guide the flue gas to flow out through exhanst gas outlet 31, intercommunication heat sink and dust remover on exhanst gas outlet 31 can prevent that the smoke and dust from getting into the atmosphere polluted environment.
Further, in some embodiments, the cooling device comprises: the cooling chamber, exhaust-heat boiler and deposit the ash room, be equipped with a plurality of first heat exchange tubes that set up around the internal perisporium of cooling chamber in the cooling chamber, the one end intercommunication cooling tube of first heat exchange tube, exhaust-heat boiler intercommunication cooling chamber, be equipped with a plurality of second heat exchange tubes in the exhaust-heat boiler, the second heat exchange tube sets up around exhaust-heat boiler's internal perisporium, and the one end of second heat exchange tube intercommunication first heat exchange tube one end back to the cooling tube, the leading cooling chamber of intercommunication flue gas cover and the rearmounted cooling chamber of intercommunication leading cooling chamber, the upper end intercommunication flue gas cover of leading cooling chamber, the upper end intercommunication exhaust-heat boiler of rearmounted cooling chamber, the lower extreme of leading cooling chamber and the lower extreme intercommunication of rearmounted cooling chamber communicate, deposit the ash room and be located the below of leading cooling chamber and rearmounted cooling chamber, and the lower extreme intercommunication of leading cooling chamber deposits the top of ash room, the lower extreme intercommunication of rearmo.
Through setting up exhaust-heat boiler and deposit the ash chamber, can further reduce the flue gas temperature, and then eliminate the dust in the flue gas.
The above embodiments are preferred embodiments of the present invention, and those skilled in the art can make variations and modifications to the above embodiments, therefore, the present invention is not limited to the above embodiments, and any obvious improvements, substitutions or modifications made by those skilled in the art based on the present invention are within the protection scope of the present invention.
Claims (10)
1. A flue gas hood for increasing scrap preheating temperature, comprising:
the device comprises a flue gas hood (30), wherein a first sealing device (32) is arranged inside the flue gas hood (30) and at the feeding end;
the connecting cover (40) is connected with the flue gas cover (30), and a second sealing device (41) is arranged at the feed end of the connecting cover (40);
at least one of the first sealing device (32) and the second sealing device (41) comprises:
the connecting shaft (321) is connected to the flue gas cover (30) or the connecting cover (40) and extends along the width direction of the flue gas cover (30) or the connecting cover (40);
the sealing elements (322) are pivotally sleeved on the connecting shaft (321), the swinging ends of the sealing elements (322) are suitable for abutting against the upper surface of the scrap steel (21), the sealing elements (322) are arranged along the axial direction of the connecting shaft (321), and the opposite surfaces of the adjacent sealing elements (322) are in abutting contact;
the flue gas cover (30) or the connecting cover (40) is connected with the baffle (7) between the rotating shaft (6), and the baffle (7) and the cover body are as wide as each other.
2. A flue gas hood for increasing the preheating temperature of scrap steel according to claim 1, wherein the sealing member (322) is formed in a fan-shaped structure freely hung on the connecting shaft (321), and the thickness of the sealing member (322) is 3 mm-200 mm.
3. A fume hood for raising the preheating temperature of scrap according to claim 1, characterized in that said sealing member (322) is formed as a hollow structure.
4. The fume hood for raising a preheating temperature of scrap steel according to claim 1, wherein the sealing members (322) are each formed with a coupling hole through which the coupling shaft (321) passes, and at least a portion of an outer circumferential edge of the sealing member (322) is formed in a circular arc shape coaxially disposed with the coupling hole.
5. A fume hood for increasing scrap preheating temperature according to claim 1, wherein said sealing member (322) further comprises:
the sliding wheel (327) is rotatably connected to the bottom of the sealing element (322), and the sliding wheel (327) protrudes out of the bottom of the sealing element (322) and is in contact with the upper surface of the scrap steel (21) in a stopping way.
6. A flue gas hood for increasing the preheating temperature of scrap steel according to claim 1, wherein the sum of the thicknesses of the sealing members (322) in the flue gas hood (30) is equal to the width of the inner cavity of the flue gas hood (30), and one side surface of the sealing member (322) at the end of the connecting shaft (321) is in stop contact with the inner peripheral wall of the flue gas hood (30).
7. A flue gas hood for increasing the preheating temperature of scrap steel according to claim 1, wherein the connecting shaft (321) is a water-cooled shaft or a vaporization-cooled shaft.
8. A flue gas hood for increasing the preheating temperature of scrap steel according to claim 1, wherein a flow guide device is arranged on the high temperature side in the flue gas hood (30), the flow guide device is a flow guide body which is fixed on the top of the inner side of the flue gas hood and inclines or bends downwards along the flue gas flow direction, and the width of the flow guide body is the same as that of the hood body.
9. A flue gas hood for raising the preheating temperature of scrap steel according to claim 8, wherein the flow guide body is a refractory steel material piece or a refractory steel external application refractory material piece or a water-cooled structural member or a vaporization cooling structural member.
10. A fume hood for raising the preheating temperature of scrap steel according to claim 1, characterized in that a draft hood is provided between said fume hood (30) and said connecting hood (40).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922162889.4U CN211425086U (en) | 2019-12-04 | 2019-12-04 | Flue gas hood for improving preheating temperature of scrap steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922162889.4U CN211425086U (en) | 2019-12-04 | 2019-12-04 | Flue gas hood for improving preheating temperature of scrap steel |
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| Publication Number | Publication Date |
|---|---|
| CN211425086U true CN211425086U (en) | 2020-09-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201922162889.4U Expired - Fee Related CN211425086U (en) | 2019-12-04 | 2019-12-04 | Flue gas hood for improving preheating temperature of scrap steel |
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| Country | Link |
|---|---|
| CN (1) | CN211425086U (en) |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200904 |