CN218600334U

CN218600334U - Flue gas trapping system of large-scale electric arc furnace

Info

Publication number: CN218600334U
Application number: CN202223147491.1U
Authority: CN
Inventors: 徐冬冬; 沈佳; 王连虎
Original assignee: Wuxi Dongxiong Heavy Arc Furnace Co ltd
Current assignee: Wuxi Dongxiong Heavy Arc Furnace Co ltd
Priority date: 2022-11-27
Filing date: 2022-11-27
Publication date: 2023-03-10
Anticipated expiration: 2032-11-27

Abstract

The utility model provides a large-scale electric arc furnace flue gas entrapment system, include: the electric arc furnace comprises an electric arc furnace body, a steel frame body, a first closed cover, a second closed cover and a third closed cover, wherein a track is arranged on the electric arc furnace body, the first closed cover, the second closed cover and the third closed cover are arranged on the track through guide wheels, the steel frame body comprises a hoisting structure, and when the hoisting structure is relatively fixed with the second closed cover or the first closed cover, the distance between the first closed cover and the second closed cover changes along with the movement of the hoisting structure; the utility model discloses a set up mobilizable first airtight cover, the airtight cover of second and the airtight cover of third, when the reinforcing holds the cigarette volume, can also let first airtight cover and the airtight cover of second paste tight exhaust port, through setting up W shape seal baffle, avoid the phenomenon of labyrinth leakage cigarette, through setting up the back flow angle, improve airtight cover smoke and dust entrapment efficiency.

Description

Flue gas trapping system of large-scale electric arc furnace

Technical Field

The utility model relates to an environmental protection equipment technical field particularly, relates to large-scale electric arc furnace flue gas entrapment system.

Background

With the continuous improvement of the ratio of the electric arc furnace steelmaking capacity in China, the electric arc furnace steelmaking technology makes great progress. The furnace capacity of the high-efficiency electric arc furnace is continuously increased from 80 tons to 150 tons, the capacity of a transformer for smelting the electric arc furnace is up to 16MVA at most, the maximum secondary current of smelting is up to 85000A at most, and the maximum oxygen supply amount is 13500NM ³ The carbon spraying amount is 20kg/t steel, the carbon increasing amount reaches 7kg/t steel, the smelting time is shortened to 33 min/furnace, and high-strength smelting brings about explosive increase of smoke dust of an electric arc furnace.

Therefore, with the progress of the steel-making technology of the large electric arc furnace in recent years, particularly, a large number of Consisti electric furnaces of foreign famous enterprises are introduced, the smelting intensity is greatly enhanced, and the smelting time is greatly reduced, so that the smoke dust which is exploded in unit time of the large electric arc furnace is increased in multiples, the trapping difficulty of the closed cover of the electric arc furnace is increased rapidly, the phenomena of labyrinth smoke leakage, cover body smoke return and the like frequently occur in the originally designed closed cover of the electric arc furnace, the production environment of a steel-making workshop is seriously influenced, and the safety and the health of workers are harmed.

Therefore, it is necessary to develop a large-sized electric arc furnace flue gas capture system with good smoke capture effect.

SUMMERY OF THE UTILITY MODEL

The utility model provides a large-scale electric arc furnace flue gas entrapment system solves above-mentioned problem.

In order to achieve the above object, an embodiment of the present invention provides a large-scale electric arc furnace flue gas trapping system, including: electric arc furnace, steel frame body, first airtight cover, the airtight cover of second and the airtight cover of third, be provided with the track on the electric arc furnace, first airtight cover the second airtight cover with the airtight cover of third passes through the leading wheel setting and is in on the track, steel frame body includes hoisting structure, works as hoisting structure with the second airtight cover or when first airtight cover is fixed relatively, first airtight cover with distance between the airtight cover of second is followed hoisting structure's removal changes.

Furthermore, W-shaped sealing baffles are arranged on the side edges of the first sealing cover, the second sealing cover and the third sealing cover, and the two W-shaped sealing baffles are staggered and abutted to form a flue gas labyrinth channel.

Furthermore, the top surface both sides of first airtight cover the airtight cover of second with the airtight cover of third all are provided with the back flow angle, the inclined plane on the back flow angle with first airtight cover the airtight cover of second with the contained angle between the airtight cover side of third is.

Furthermore, one side of the electric arc furnace is provided with a transformer structure, and the transformer structure is electrically connected with the electric arc furnace through a cable assembly.

Furthermore, the cable subassembly includes the cable conductor, the one end of cable conductor with the electric arc furnace electricity is connected, the other end with transformer structure electricity is connected, the surface coating of cable conductor has condenser tube.

Further, the transformer structure with be provided with thermal-insulated barricade between the third sealed cowling, thermal-insulated barricade with W shape seal baffle offsets.

Furthermore, the heat insulation retaining wall is composed of a copper plate and a heat insulation layer.

Furthermore, a smoke exhaust pipe is arranged on the electric arc furnace, and part of the smoke exhaust pipe is arranged in the first closed cover, the second closed cover and the third closed cover.

Further, be provided with the steel material on the electric arc furnace and add the structure, one side that the structure was added to the steel material is provided with the auxiliary material and adds the structure, one side of electric arc furnace is provided with the structure of oxygenating.

Further, the moving range between the first closed cover and the second closed cover is 0-16.5 meters.

Compared with the prior art, the embodiment of the utility model provides a following beneficial effect has: through setting up mobilizable first airtight cover, the airtight cover of second and the airtight cover of third, when the reinforcing holds the cigarette volume, can also let first airtight cover and the airtight cover of second paste tight exhaust port, through setting up W shape seal baffle, avoid the phenomenon that the labyrinth leaks the cigarette, through setting up the back flow angle, improve airtight cover smoke and dust entrapment efficiency, through setting up thermal-insulated barricade, can also avoid the transformer structure under the effect of isolated magnetic field overheated.

Drawings

The present invention will be further described with reference to the accompanying drawings and examples.

FIG. 1 is a schematic view of the flue gas collecting system of a large-sized electric arc furnace;

FIG. 2 is a schematic diagram of a side view of the flue gas capture system of the large-sized electric arc furnace of the present invention;

FIG. 3 is a schematic view of a partial top view of the flue gas capture system of the large-sized electric arc furnace of the present invention;

fig. 4 is a schematic front sectional view of a second W-shaped sealing baffle and a third W-shaped sealing baffle of the present invention;

fig. 5 is a schematic top view of the cable assembly according to the present invention.

Wherein, 1, an electric arc furnace; 2. adding a steel material into the structure; 3. an auxiliary material adding structure; 4. a transformer structure; 5. a steel frame body; 51. hoisting the structure; 6. a cable assembly; 61. a cooling water pipe; 62. a cable wire; 7. a first enclosure; 8. a second enclosure; 81. a W-shaped sealing baffle; 9. a third enclosure; 10. a smoke exhaust pipe; 11. a heat insulation retaining wall; 12. a flow reversing angle; 13. a guide wheel; 14. a track; 15. and (4) an oxygen adding structure.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic drawings, which illustrate the basic structure of the present invention in a schematic manner, and thus show only the components related to the present invention.

Referring to fig. 1 to 3, fig. 1 is a schematic front view of a flue gas collecting system of a large-sized electric arc furnace according to the present invention; FIG. 2 is a schematic diagram of a side view of a flue gas capture system of a large-sized electric arc furnace according to the present invention; fig. 3 is a schematic view of the local overlooking structure of the flue gas capture system of the large-sized electric arc furnace of the present invention. As shown in fig. 1 to 3, the utility model provides a large-scale electric arc furnace flue gas capture system, include: the electric arc furnace comprises an electric arc furnace 1, a steel frame body 5, a first closed cover 7, a second closed cover 8 and a third closed cover 9, and it needs to be further explained that the first closed cover 7, the second closed cover 8 and the third closed cover 9 adopt a large-capacity design, so that sufficient smoke storage volumes are ensured in the first closed cover 7, the second closed cover 8 and the third closed cover 9 when smoke of the electric arc furnace explodes. The electric arc furnace 1 is provided with a smoke exhaust pipe 10, and part of the smoke exhaust pipe 10 is arranged in the first closed hood 7, the second closed hood 8 and the third closed hood 9. Specifically, a plurality of cigarette holders are arranged on the smoke exhaust pipe 10, the cigarette holders are mainly used for pumping smoke exhausted into the first closed hood 7, the second closed hood 8 and the third closed hood 9 into the smoke exhaust pipe 10 and discharging the smoke finally, the steel material adding structure 2 is arranged on the electric arc furnace 1, the auxiliary material adding structure 3 is arranged on one side of the steel material adding structure 2, and the oxygen adding structure 15 is arranged on one side of the electric arc furnace 1.

Please continue to refer to fig. 1 in conjunction with fig. 2. As shown in fig. 1 and 2, a rail 14 is disposed on the arc furnace 1, the first enclosure 7, the second enclosure 8 and the third enclosure 9 are disposed on the rail 14 through a guide wheel 13, the first enclosure 7 and the second enclosure 8 can be accurately covered on a smoke outlet on the arc furnace 1 by moving on the rail 14 through the guide wheel 13, the steel frame body 5 includes a hoisting structure 51, as in the prior art, in the smoke trapping system of the present embodiment, the hoisting structure 51 can be driven by a driving device to horizontally move on the steel frame body 5, and mainly functions to change specific positions on the rail 14 in the first enclosure 7, the second enclosure 8 and the third enclosure 9, when the hoisting structure 51 drives the first enclosure 7 or the second enclosure 8, the first enclosure 7, the second enclosure 8 can be accurately covered on the smoke outlet, when the hoisting structure 51 drives the third enclosure 9 to move, the arc furnace 1 covering a portion below the third enclosure 9 can be overhauled, when the hoisting structure 51 moves relative to the second enclosure 7 or the second enclosure 8, and when the hoisting structure 51 moves relative to the second enclosure 7, and the hoisting structure 51 changes a distance between the second enclosure 8 and the hoisting structure 51. The range of movement between the first enclosure 7 and the second enclosure 8 is 0-16.5 metres.

Please continue to participate in fig. 1 in combination with fig. 4, fig. 4 is a schematic front sectional view of a second W-shaped sealing baffle and a third W-shaped sealing baffle according to the present invention. As shown in figures 1 and 4, W-shaped sealing baffles 81 are arranged on the side edges of the first closed cover 7, the second closed cover 8 and the third closed cover 9, the W-shaped sealing baffles 81 are abutted to greatly improve the connection tightness between the two covers, and the two W-shaped sealing baffles 81 are staggered and abutted to form a flue gas labyrinth passage. Specifically, the auxiliary air pipe and the embedded type flow guide plate are additionally arranged in the areas with lower negative pressure in the first closed cover 7, the second closed cover 8 and the third closed cover 9, smoke is diffused in the covers through auxiliary capturing and flow guiding means under the condition that the dust suction effect of a main smoke capturing area is not influenced, and meanwhile, the flow blocking plate is additionally arranged below a smoke labyrinth channel on the covers, so that the phenomenon of smoke leakage in the labyrinth is avoided. The two sides of the top surfaces of the first closed cover 7, the second closed cover 8 and the third closed cover 9 are respectively provided with a backflow angle 12, the included angle between the inclined plane on the backflow angle 12 and the side surface of the first closed cover 7, the second closed cover 8 and the third closed cover 9 is 42 degrees, it needs to be further explained that the included angle between the inclined plane on the backflow angle 12 and the side surface of the first closed cover 7, the second closed cover 8 and the third closed cover 9 is 42 degrees, smoke flow plants in the covers are optimized, and therefore smoke collecting efficiency in the covers is improved.

Referring to fig. 5 in conjunction with fig. 1, fig. 5 is a schematic top view of a cable assembly according to the present invention. As shown in fig. 1 and 5, one side of the electric arc furnace 1 is provided with a transformer structure 4, and the transformer structure 4 is electrically connected to the electric arc furnace 1 by a cable assembly 6. The cable assembly 6 comprises a cable 62, one end of the cable 62 is electrically connected with the electric arc furnace 1, the other end of the cable 62 is electrically connected with the transformer structure 4, and the surface of the cable 62 is wrapped with a cooling water pipe 61.

Referring to fig. 1, as shown in fig. 1, a thermal insulation wall 11 is disposed between the transformer structure 4 and the third enclosure 9, and the thermal insulation wall 11 abuts against the W-shaped sealing baffle 81. The thermal insulation retaining wall 11 is composed of a copper plate and a thermal insulation layer, and it should be further explained that a thin copper sheet is wrapped on the surface of a cover plate of the third closed cover 9 near a large-current area of the electric arc furnace 1 to effectively insulate a magnetic field, so that the third closed cover 9 is prevented from generating heat locally, and the working efficiency of the short-net system of the electric arc furnace 1 is improved.

To sum up, the beneficial effects of the utility model are that: through setting up mobilizable first airtight cover 7, the airtight cover 8 of second and the airtight cover 9 of third, when the reinforcing holds the cigarette volume, can also let first airtight cover 7 and the airtight cover 8 of second paste tight exhaust port, through setting up W shape seal baffle 81, avoid the phenomenon of labyrinth leakage cigarette, through setting up backflow angle 12, improve airtight cover smoke and dust entrapment efficiency, through setting up thermal-insulated barricade 11, played and to have avoided under the effect of isolated magnetic field 4 overheated transformer structures.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. Large-scale electric arc furnace flue gas entrapment system characterized in that includes: electric arc furnace (1), steel frame body (5), first airtight cover (7), the airtight cover of second (8) and the airtight cover of third (9), be provided with track (14) on electric arc furnace (1), first airtight cover (7) the airtight cover of second (8) with the airtight cover of third (9) sets up through leading wheel (13) on track (14), steel frame body (5) include hoisting structure (51), work as hoisting structure (51) with the airtight cover of second (8) or when first airtight cover (7) is fixed relatively, first airtight cover (7) with distance between the airtight cover of second (8) is along with hoisting structure's (51) removal changes.

2. The large electric arc furnace flue gas capture system of claim 1, wherein: w-shaped sealing baffles (81) are arranged on the side edges of the first sealing cover (7), the second sealing cover (8) and the third sealing cover (9), and the two W-shaped sealing baffles (81) are staggered and abutted to form a flue gas labyrinth passage.

3. The large electric arc furnace flue gas capture system of claim 1, wherein: first airtight cover (7), second airtight cover (8) and the top surface both sides of third airtight cover (9) all are provided with down flow angle (12), the inclined plane on down flow angle (12) with first airtight cover (7), second airtight cover (8) with the contained angle between third airtight cover (9) side is 42.

4. The large electric arc furnace flue gas capture system of claim 2, wherein: one side of electric arc furnace (1) is provided with transformer structure (4), transformer structure (4) through cable assembly (6) with electric arc furnace (1) electricity is connected.

5. The large electric arc furnace flue gas capture system of claim 4, wherein: cable subassembly (6) include cable conductor (62), the one end of cable conductor (62) with electric arc furnace (1) electricity is connected, the other end with transformer structure (4) electricity is connected, the surface coating of cable conductor (62) has condenser tube (61).

6. The large electric arc furnace flue gas capture system of claim 5, wherein: transformer structure (4) with be provided with thermal-insulated barricade (11) between third sealed cowling (9), thermal-insulated barricade (11) with W shape sealing baffle (81) offset.

7. The large electric arc furnace flue gas capture system of claim 6, wherein: the heat insulation retaining wall (11) is composed of a copper plate and a heat insulation layer.

8. The large electric arc furnace flue gas capture system of claim 1, wherein: the electric arc furnace (1) is provided with a smoke exhaust pipe (10), and part of the smoke exhaust pipe (10) is arranged in the first closed cover (7), the second closed cover (8) and the third closed cover (9).

9. The large arc furnace flue gas capture system of claim 1, wherein: be provided with steel material on electric arc furnace (1) and add structure (2), one side that steel material added structure (2) is provided with auxiliary material and adds structure (3), one side of electric arc furnace (1) is provided with oxygen structure (15).

10. The large arc furnace flue gas capture system of claim 1, wherein: the moving range between the first closed cover (7) and the second closed cover (8) is 0-16.5 meters.