CN111981860A - Submerged arc furnace capable of realizing smoke sealing and recycling - Google Patents
Submerged arc furnace capable of realizing smoke sealing and recycling Download PDFInfo
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- CN111981860A CN111981860A CN202010798968.9A CN202010798968A CN111981860A CN 111981860 A CN111981860 A CN 111981860A CN 202010798968 A CN202010798968 A CN 202010798968A CN 111981860 A CN111981860 A CN 111981860A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/001—Extraction of waste gases, collection of fumes and hoods used therefor
- F27D17/002—Details of the installations, e.g. fume conduits or seals
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/18—Door frames; Doors, lids, removable covers
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- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
Abstract
The invention provides a submerged arc furnace for realizing smoke sealing and recycling, which comprises: set up at the hot stove bell of hexagonal ore deposit three non-adjacent edges, carry out the fume extractor that collects to the flue gas that produces when smelting the hot stove in ore deposit, carry out the cyclic utilization system of retrieving and recycling to a small amount of excessive flue gas, wherein, the cyclic utilization system includes: the smoke collection system is arranged on the middle platform, and the smoke utilization system is arranged in an operation room between the middle platform and the lower platform; the ring-type smoke collecting pipe of the smoke collecting system is arranged around the three-phase electrode, the ring-type smoke collecting pipe is communicated with the air inlet end of the centrifugal fan, air suction ports of a plurality of air suction branch pipes led out from the ring-type smoke collecting pipe downwards penetrate through the middle-layer platform, and the output end of the centrifugal fan also penetrates through the middle-layer platform and is communicated with a ring-type air supply pipe which is arranged above the lower-layer platform in a surrounding mode. The device is mainly used for collecting a small amount of leaked flue gas on the submerged arc furnace and applying the collected gas to each device needing to seal the flue gas.
Description
Technical Field
The invention relates to a submerged arc furnace for recycling smoke dust, in particular to a submerged arc furnace for realizing sealed recycling of smoke dust.
Background
When the submerged arc furnace is combusted, a large amount of flue gas can be generated, most of primary flue gas generated by smelting is discharged from a smoke exhaust device arranged on a furnace cover of the submerged arc furnace, is cooled by a water-cooling elbow, a water-cooling sliding sleeve, a combustion settling chamber and a water-cooling flue, is cooled to about 130 ℃ by an air cooler or a spray cooling tower, enters a dust remover for purification, and is exhausted to the atmosphere by a fan.
However, in practical use, the submerged arc furnace cannot achieve one hundred percent of sealing, a small part of flue gas still exists, the small part of flue gas flows out from the installation gap between the electrode and the furnace cover, or the furnace door is opened, or the small part of flue gas overflows from the feeding pipeline to the outside of the furnace body, the small part of flue gas drifts towards the furnace top after overflowing due to high temperature of the small part of flue gas, and is mixed with air around the furnace body in the drifting process to form flue gas with low concentration, if the low-concentration flue gas around the furnace body is not processed in time, the concentration of the flue gas gradually rises, the environment of an operation room is polluted, and the respiratory health of people working for a long time in the operation room cannot be effectively.
Disclosure of Invention
The invention provides a submerged arc furnace for realizing sealed recycling of smoke dust, aiming at solving the problems in the prior art.
This hot stove in ore deposit includes: set up at the hot stove bell of hexagonal ore deposit three non-adjacent edges, carry out the fume extractor that collects to the flue gas that produces when smelting the hot stove in ore deposit, carry out the cyclic utilization system of retrieving and recycling to a small amount of excessive flue gas, wherein, the cyclic utilization system includes: the smoke collection system is arranged on the middle platform, and the smoke utilization system is arranged in an operation room between the middle platform and the lower platform; the ring-type smoke collecting pipe of the smoke collecting system is arranged around the three-phase electrode, the ring-type smoke collecting pipe is communicated with the air inlet end of the centrifugal fan, air suction ports of a plurality of air suction branch pipes led out from the ring-type smoke collecting pipe downwards penetrate through the middle-layer platform, and the output end of the centrifugal fan also penetrates through the middle-layer platform and is communicated with a ring-type air supply pipe which is arranged above the lower-layer platform in a surrounding mode.
Furthermore, the branch pipes of the air suction extend out of the ring-type smoke collecting pipe in different lengths, the other ends of the branch pipes of the air suction extend out of the middle platform to the top of the operating room, and air mixed with a small amount of smoke at the top of the operating room is continuously sucked into the ring-type smoke collecting pipe through the centrifugal fan.
Further, the flue gas utilization system comprises: the lifting door smoke sealing device is arranged on the furnace door, the material channel smoke sealing device for preventing smoke from overflowing from the feeding channel, and the electrode smoke sealing device surrounding the three-phase electrode.
Furthermore, the smoke sealing device of the lifting door is characterized in that two lifting door air inlet pipes are used for introducing air in the annular air supply pipe to the built-in air path of the door frame, and then the air is blown out from a group of air wall exhaust holes below the door frame.
Furthermore, the flue gas sealing device is respectively communicated with the top of the vibrating feeder and the annular gas cooling bin at the lower part of the rotary distributor through a flue gas supply pipe.
Furthermore, an annular air outlet is arranged between the annular air cooling bin and the material channel at the center of the rotary distributing machine, so that the air entering the annular air cooling bin is continuously blown to the furnace body.
Furthermore, the three annular smoke sealing chambers arranged on the electrode smoke sealing device around the electrode introduce gas in the annular gas supply pipe through the electrode gas supply pipe, the gas is blown out from the annular gas outlet arranged on the inner side of the annular smoke sealing chambers, and the opening direction of the annular gas outlet is downward, so that the smoke is forced to be away from a gap between the electrode and the furnace cover.
Further, the range of the air volume provided by the centrifugal fan is 14000m3H to 22000m3/h。
Furthermore, each branch pipeline led out from the ring-type air supply pipe comprises a lifting door air inlet pipe, a material channel air supply pipe and an electrode air supply pipe, and is provided with an air inlet throttle valve for distributing the air quantity required by each smoke sealing device according to the requirement.
The invention has the technical effects that: because the flue gas temperature that produces in the ore smelting furnace is higher, and density is less to the air of normal atmospheric temperature rather, and the flue gas that spills over in a small amount can drift to the eminence, consequently, sets up flue gas collection system at middle level platform, and the branch pipe of breathing in that each length differs on the flue gas collection system passes middle level platform, stretches out to the operation room top, ensures that the flue gas that drifts to the eminence is retrieved by flue gas collection system. The temperature is reduced after the recovered flue gas is mixed with the ambient air, and the flue gas sealing device has a good cooling effect on flowing equipment when used for sealing the flue gas.
The air quantity of the high-power centrifugal fan adopted by the invention is at least 14000m3More than h, the noise is larger during operation, so the fan is arranged on the middle platform, and the condition that the workers in the operation room are absent is ensuredThe system works in the environment with the influence of the wind turbine, and the hearing of workers is protected.
In the invention, positive pressure gas is introduced into the furnace body and the furnace door, the feeding channel, the rotary distributor and the electrode mounting hole which are communicated with the outside, and the positive pressure gas is introduced into the furnace body in the opposite direction of the overflow of the flue gas, so that the gas which possibly overflows is blown back into the furnace body and then is discharged from the smoke exhaust device. Meanwhile, the positive pressure gas with lower temperature ensures that the flue gas with high heat and high temperature is far away from the gas outlet, and keeps the temperature near the gas outlet lower, so that the equipment installed near the gas outlet can reliably run in a proper temperature range.
The main gas supply pipeline of the smoke utilization system adopts the ring-type gas supply pipe, so that gas required by each smoke sealing device can be led out of the ring-type gas supply pipe for supplying gas, the gas pressure in each gas distributing pipe is kept relatively balanced, each gas distributing pipe can be provided with the gas inlet throttle valve, the gas flow of the output pipeline is limited, and the accurate control is realized as required.
The smoke exhaust device is arranged on the periphery of the furnace cover, most of the smoke sealing devices are arranged on the top of the furnace cover, gas blown into the furnace body from the top of the furnace cover meets high-temperature smoke which upwards gushes out, two air flows form advection gas after interaction, and the advection gas flows to the edge of the furnace cover, so that the efficient collection of the smoke exhaust device on the smoke is facilitated.
Drawings
FIG. 1 is an isometric view of a submerged arc furnace flue gas recycling system of the present invention;
FIG. 2 is an isometric view of the flue gas collection system of the present invention;
FIG. 3 is an isometric view of the flue gas utilization system of the present invention;
FIG. 4 is a cross-sectional view of the smoke sealing device of the lift gate of the present invention;
FIG. 5 is a cross-sectional view of the flue sealing device of the present invention;
FIG. 6 is a top view of the flue gas utilization system of the present invention;
FIG. 7 is a cross-sectional view of an electrode smoke sealing apparatus of the present invention;
in the figure, 1, a middle platform, 2, a lower platform, 3, a recycling system, 4, a flue gas collecting system, 5, a flue gas utilizing system, 41, a flue gas purifying pipeline, 42, an annular smoke collecting device, 43, an annular smoke collecting pipe, 44, a centrifugal fan, 45, an air suction branch pipe, 51, an annular air supply pipe, 52, a flue air supply pipe, 53, an air wall exhaust hole, 54, a lifting door air inlet pipe, 55, an electrode air supply pipe, 56, an air inlet throttle valve, 60, a smoke exhaust device, 70, a lifting door smoke sealing device, 80, a flue smoke sealing device, 90, an electrode smoke sealing device, 521, a vibration blanking device, 522, a rotary distributing machine, 523, an annular air cooling bin, 551, an annular smoke sealing bin and 552, an annular exhaust port are arranged.
Detailed Description
The following describes a specific embodiment of the present invention with reference to fig. 1 to 7.
Fig. 1 illustrates the overall structure of a submerged arc furnace flue gas recycling system, which comprises: set up at three non-adjacent edges of the hot stove bell of hexagonal ore deposit, the fume extractor 60 that produces when smelting the hot stove in ore deposit carries out the collection carries out recycle system 3 of retrieving recycle to a small amount of excessive flue gas, and wherein, recycle system 3 includes: the flue gas collection system 4 is arranged on the middle platform 1, the flue gas utilization system 5 is arranged in an operating room between the middle platform 1 and the lower platform 2, the annular smoke collection pipe 43 of the flue gas collection system 4 is arranged around the three-phase electrode, the annular smoke collection pipe 43 is communicated with the air inlet end of the centrifugal fan 44, the air suction ports of a plurality of air suction branch pipes 45 led out from the annular smoke collection pipe 43 downwards penetrate through the middle platform 1, and the output end of the centrifugal fan 44 also penetrates through the middle platform 1 and is communicated with the annular air supply pipe 51 surrounding the upper part of the lower platform 2.
Fig. 2 shows the components of the fume collecting system, and the air suction branch pipes 45 are extended from the ring-shaped fume collecting pipe 43 in different lengths, and the other end is extended downwards from various positions of the middle platform 1 to the top of the operating room, and the air mixed with a small amount of fume at the top of the operating room is continuously sucked into the ring-shaped fume collecting pipe 43 through the centrifugal fan 44.
Fig. 3 illustrates the components of the flue gas utilization system, said flue gas utilization system 5 comprising: a smoke sealing device 70 of a lifting door arranged at the furnace door, a material channel smoke sealing device 80 for preventing smoke from overflowing from a feeding channel, and an electrode smoke sealing device 90 surrounding the three-phase electrode; each branch pipeline led out from the ring-type air supply pipe 51 comprises a lifting door air inlet pipe 54, a material channel air supply pipe 52 and an electrode air supply pipe 55, and is provided with an air inlet throttle valve 56 for distributing the air volume required by each smoke sealing device according to requirements.
Fig. 4 and 5 illustrate the internal structures of the smoke sealing device of the lifting door and the smoke sealing device of the material channel, and the smoke utilization system 5 comprises: a smoke sealing device 70 of a lifting door arranged at the furnace door, a material channel smoke sealing device 80 for preventing smoke from overflowing from a feeding channel, and an electrode smoke sealing device 90 surrounding the three-phase electrode; the smoke sealing device 70 with the lifting door is characterized in that gas in the annular gas supply pipe 51 is introduced to a built-in gas path of the door frame through two lifting door gas inlet pipes 54 and then blown out from a group of air wall exhaust holes 53 below the door frame, and an annular gas outlet is arranged between the annular gas cooling bin 523 and a material channel at the center of the rotary material distributor 522, so that the gas entering the annular gas cooling bin 523 is continuously blown to a furnace body.
Fig. 6 and 7 show a specific structure of the electrode fume sealing device, three annular fume sealing chambers 551 arranged around the electrode on the electrode fume sealing device 90 are introduced with gas in the annular gas supply pipe 51 by the electrode gas supply pipe 55, the gas is blown out from annular gas outlets 552 arranged at the inner side of the annular fume sealing chambers 551, and the opening direction of the annular gas outlets 552 is downward, so that the fume is forced to be far away from a gap between the electrode and the furnace cover.
The working principle is as follows: most of the smoke generated during smelting of the submerged arc furnace is discharged from the smoke exhaust device, a small amount of smoke overflows from a certain gap or a place which needs to be communicated between a furnace body such as a material channel, a rotary material distributor, an electrode mounting hole and a lifting door and the outside, and drifts into an operating room between the middle-layer platform 1 and the lower-layer platform 2, the smoke overflows from the furnace body, the temperature of the smoke is high, the smoke drifts towards the top of the operating room, the top of the operating room is provided with a branch air suction pipe 45 extending from the upper part of the middle-layer platform 1, the other end of the branch air suction pipe 45 is communicated with a ring-shaped smoke collecting pipe 43, and the ring-shaped smoke collecting pipe 43 is communicated with the air exhaust end of a centrifugal fan 44, so that the smoke at the top accessory of the operating room is sucked into the ring-shaped smoke collecting pipe 43 under the action.
The output end of the centrifugal fan 44 passes through the middle platform 1 downwards and is communicated with the ring-type air supply pipe 51, the ring-type air supply pipe 51 is led out to be different in trend, and the material channel air supply pipe 52, the lifting door air supply pipe 54 and the electrode air supply pipe 55 which are different in length are communicated with areas where positive pressure gas is needed to seal smoke on the material channel smoke sealing device 80, the lifting door smoke sealing device 70 and the electrode smoke sealing device 90.
The material channel gas supply pipe 52 is divided into two paths, wherein one path blows out positive pressure gas from the top of the vibration feeder 521 to the falling direction of the material, so that the material channel can continuously belong to the positive pressure gas to the furnace body no matter whether the vibration feeder 521 works or not, and smoke is prevented from rising along the material channel; in addition, positive pressure gas is introduced into the annular air cooling bin 523 below the rotary material distributor 522 all the way, and the rotary material distributor 522 above the annular air cooling bin 523 needs to be rotated for material distribution, so a certain annular gap must be formed between the annular air cooling bin 523 and the rotary material distributor 522, the gap between the upper part of the annular air cooling bin 523 and the rotary material distributor 522 is smaller, the gap between the lower part of the annular air cooling bin 523 and the rotary material distributor 522 is larger, an annular gas blowing port is formed, and the positive pressure gas entering the annular air cooling bin 523 is blown to the inside of the furnace body from the annular gas blowing port to prevent the smoke from flowing out. The air inlet pipe 54 of the lifting door is communicated with the built-in air path of the door edge, and a group of air wall exhaust holes 53 arranged on the door edge enable air flow to be blown from top to bottom, so that an air wall is formed between the operation room and the interior of the furnace body, and the circulation of internal smoke and external air is blocked. The electrode air supply pipe 55 introduces positive pressure air into the annular smoke sealing chamber 551 of the electrode smoke sealing device 90, and the opening direction of the annular exhaust port 552 is downward, so that smoke is forced to be away from the gap between the electrode and the furnace cover.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. The utility model provides a realize hot stove in ore deposit that smoke and dust is sealed to be recycled which characterized in that, this hot stove in ore deposit includes: set up at three non-adjacent edges of the hot stove bell of hexagonal ore deposit, smoke exhaust apparatus (60) that the flue gas that produces when smelting the hot stove in ore deposit carries out the cyclic utilization system (3) of collecting, to a small amount of excessive flue gas and retrieve and recycle, wherein, cyclic utilization system (3) include: a flue gas collecting system (4) arranged on the middle platform (1), and a flue gas utilizing system (5) arranged in an operating room between the middle platform (1) and the lower platform (2);
the ring-type smoke collecting pipe (43) of the smoke collecting system (4) is arranged around the three-phase electrode, the ring-type smoke collecting pipe (43) is communicated with the air inlet end of the centrifugal fan (44), the air suction ports of a plurality of air suction branch pipes (45) led out of the ring-type smoke collecting pipe (43) downwards penetrate through the middle-layer platform (1), and the output end of the centrifugal fan (44) also penetrates through the middle-layer platform (1) and is communicated with a ring-type air supply pipe (51) surrounding the upper part of the lower-layer platform (2).
2. The submerged arc furnace for realizing sealed recycling of flue dust according to claim 1, characterized in that each of said branch air intakes (45) is extended from the ring-type smoke collecting pipe (43) in different lengths, and the other end is extended from each position of the intermediate platform (1) downward to the top of the operating room, and the air mixed with a small amount of flue gas at the top of the operating room is continuously sucked into the ring-type smoke collecting pipe (43) through the centrifugal fan (44).
3. The submerged arc furnace implementing sealed recycling of fumes according to claim 1, characterized in that the flue gas utilization system (5) comprises: a smoke sealing device (70) of the lifting door arranged at the furnace door, a material channel smoke sealing device (80) for preventing smoke from overflowing from the feeding channel, and an electrode smoke sealing device (90) surrounding the three-phase electrode.
4. The submerged arc furnace capable of realizing smoke sealing and recycling as claimed in claim 3, wherein the lifting door smoke sealing device (70) is formed by introducing gas in the annular gas supply pipe (51) to an internal gas path of the door frame through two lifting door gas inlet pipes (54) and blowing the gas out from a group of air wall exhaust holes (53) below the door frame.
5. The submerged arc furnace capable of realizing smoke sealing and recycling as claimed in claim 3, wherein the flue gas sealing device (80) is respectively communicated to the top of the vibrating feeder (521) and the annular gas cooling bin (523) at the lower part of the rotary distributor (522) through a flue gas supply pipe (52).
6. The submerged arc furnace for realizing the sealed recycling of the smoke dust according to the claim 5, characterized in that an annular air outlet is arranged between the annular air cooling bin (523) and the material channel at the center of the rotary distributor (522), so that the air entering the annular air cooling bin (523) is continuously blown to the furnace body.
7. The submerged arc furnace capable of realizing smoke sealing and recycling as claimed in claim 3, wherein three annular smoke sealing chambers (551) arranged around the electrode on the electrode smoke sealing device (90) are introduced from the electrode gas supply pipe (55) into the annular gas supply pipe (51), gas is blown out from an annular gas outlet (552) arranged inside the annular smoke sealing chambers (551), and the opening direction of the annular gas outlet (552) is downward, so that the smoke is forced to be far away from the gap between the electrode and the furnace cover.
8. The submerged arc furnace for realizing sealed recycling of flue dust according to any of claims 1 to 7, characterized in that the air volume supplied by the centrifugal fan (44) ranges from 14000m3H to 22000m3/h。
9. The submerged arc furnace capable of realizing smoke sealing and recycling as claimed in claim 8, wherein each branch pipeline led out from the ring-type gas supply pipe (51) comprises a lift gate gas inlet pipe (54), a feed channel gas supply pipe (52) and an electrode gas supply pipe (55), and each branch pipeline is provided with a gas inlet throttle valve (56) for distributing the air volume required by each smoke sealing device according to the requirement.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010798968.9A CN111981860B (en) | 2020-08-11 | 2020-08-11 | Submerged arc furnace capable of realizing smoke sealing and recycling |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010798968.9A CN111981860B (en) | 2020-08-11 | 2020-08-11 | Submerged arc furnace capable of realizing smoke sealing and recycling |
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| CN111981860A true CN111981860A (en) | 2020-11-24 |
| CN111981860B CN111981860B (en) | 2022-07-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113587658A (en) * | 2021-08-02 | 2021-11-02 | 江苏积力环保科技有限公司 | Submerged arc furnace |
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| CN101748233A (en) * | 2008-12-04 | 2010-06-23 | 贾会平 | Method and device for smelting iron in arc furnace |
| CN204942537U (en) * | 2015-09-22 | 2016-01-06 | 中钢集团吉林机电设备有限公司 | A kind of industrial silicon furnace air seal set |
| CN109099716A (en) * | 2018-09-03 | 2018-12-28 | 中国重型机械研究院股份公司 | A kind of Water-cooling furnace cover of ladle refining furnace and its application method |
| CN110806113A (en) * | 2019-11-25 | 2020-02-18 | 北京科技大学 | Method and device for reducing energy consumption by introducing gas into submerged arc furnace |
| CN111365997A (en) * | 2020-04-13 | 2020-07-03 | 岫岩满族自治县恒锐镁制品有限公司 | Furnace top sealing device for producing large-crystal fused magnesia ore heating furnace |
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2020
- 2020-08-11 CN CN202010798968.9A patent/CN111981860B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101748233A (en) * | 2008-12-04 | 2010-06-23 | 贾会平 | Method and device for smelting iron in arc furnace |
| CN204942537U (en) * | 2015-09-22 | 2016-01-06 | 中钢集团吉林机电设备有限公司 | A kind of industrial silicon furnace air seal set |
| CN109099716A (en) * | 2018-09-03 | 2018-12-28 | 中国重型机械研究院股份公司 | A kind of Water-cooling furnace cover of ladle refining furnace and its application method |
| CN110806113A (en) * | 2019-11-25 | 2020-02-18 | 北京科技大学 | Method and device for reducing energy consumption by introducing gas into submerged arc furnace |
| CN111365997A (en) * | 2020-04-13 | 2020-07-03 | 岫岩满族自治县恒锐镁制品有限公司 | Furnace top sealing device for producing large-crystal fused magnesia ore heating furnace |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113587658A (en) * | 2021-08-02 | 2021-11-02 | 江苏积力环保科技有限公司 | Submerged arc furnace |
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| CN111981860B (en) | 2022-07-01 |
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