CN108571885B - Tangential wind distribution device around sinter shaft furnace cooling - Google Patents
Tangential wind distribution device around sinter shaft furnace cooling Download PDFInfo
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- CN108571885B CN108571885B CN201810345441.3A CN201810345441A CN108571885B CN 108571885 B CN108571885 B CN 108571885B CN 201810345441 A CN201810345441 A CN 201810345441A CN 108571885 B CN108571885 B CN 108571885B
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- air supply
- sinter
- supply column
- distribution device
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- 238000001816 cooling Methods 0.000 title claims abstract description 65
- 238000000034 method Methods 0.000 claims description 22
- 230000008569 process Effects 0.000 claims description 22
- 238000005245 sintering Methods 0.000 claims description 22
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 239000002918 waste heat Substances 0.000 abstract description 11
- 238000011084 recovery Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 6
- 238000005265 energy consumption Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000004064 recycling Methods 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000005465 channeling Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B1/00—Shaft or like vertical or substantially vertical furnaces
- F27B1/10—Details, accessories, or equipment peculiar to furnaces of these types
- F27B1/24—Cooling arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B1/00—Shaft or like vertical or substantially vertical furnaces
- F27B1/10—Details, accessories, or equipment peculiar to furnaces of these types
- F27B1/16—Arrangements of tuyeres
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27M—INDEXING SCHEME RELATING TO ASPECTS OF THE CHARGES OR FURNACES, KILNS, OVENS OR RETORTS
- F27M2003/00—Type of treatment of the charge
- F27M2003/04—Sintering
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Furnace Details (AREA)
Abstract
The invention relates to a cooling air distribution device of a sinter shaft furnace, relates to the technical field of sinter cooling equipment, and in particular relates to a circumferential tangential air distribution device for cooling the sinter shaft furnace. The device comprises an air supply column, an air cap arranged above the air supply column, a first air supply group arranged below the air cap, and a second air supply group arranged below the first air supply group. The air supply group is formed by arranging a plurality of air guide pipes along the tangential direction of the air supply column, the air guide pipes are arranged on the circumference of the air supply column at a certain angle at equal intervals, so that the circumferential uniform air distribution is realized. The invention can obviously improve the cooling efficiency and the production capacity of the sinter shaft furnace cooling and furthest improve the utilization and recovery efficiency of the sinter waste heat.
Description
Technical Field
The invention relates to the field of sinter cooling and waste heat utilization, in particular to a tangential air distribution device around a sinter shaft furnace cooling.
Background
In the steel industry, the energy consumption of the sintering process accounts for 9-12% of the total energy consumption, and the energy saving of the sintering process occupies a very important position in the energy saving of steel enterprises. The energy in the sintering process is reasonably recycled, so that the energy meets the national call of energy conservation and emission reduction in recent years, the energy spreading waste is avoided, the enterprise cost is reduced, and the enterprise competitiveness is greatly improved.
At present, the sintering cooling and waste heat recycling in China mainly use ring cooling or belt cooling technology, so that the problems of low cooling efficiency, high operation energy consumption, high air leakage and the like exist, heat is changed into sensible heat of waste gas in the cooling process of the sintering ore, a large amount of heat is directly dissipated in the environment, the heat is seriously dissipated and cannot be utilized, the waste heat recycling of the sintering machine is greatly restricted, and a large amount of waste heat resources are lost.
Chinese patent application No. 201310128026.X discloses a sinter cooling furnace consisting of a pre-stored area, an annular air passage area, a chute area, a cooling area and an air chamber; the high-temperature sintered ore is continuously and uniformly distributed into a cooling furnace for cooling through a feeding hole on a pre-storing area by a distributing device, the high-temperature sintered ore and low-temperature air blown in from the bottom of the furnace are subjected to countercurrent heat exchange in the cooling area of the cooling furnace, the sintered ore is cooled to below 180 ℃, low-temperature cold ore is discharged by a discharging device, the low-temperature air is heated to about 600 ℃ by countercurrent heat exchange, and the low-temperature air enters a waste heat recycling system through an air outlet, so that the hot air and the hot sintered ore are effectively sealed in the cooling furnace in the whole process; on the premise of ensuring or improving the quality of the sinter and reducing the return rate, the recovery and utilization efficiency of the waste heat of the sinter is improved to the greatest extent.
Disclosure of Invention
The invention aims to provide a circumferential tangential air distribution device for cooling a sinter shaft furnace, which is compact in structure, and can be used for effectively solving the defects of the air distribution technology of the existing sinter cooling furnace and realizing uniform air distribution.
Through practice, the prior air distribution device is found that in the use process, the thickness of the sinter around the hearth is larger than the material layer thickness of the central area in the downward falling process of the shaft furnace, so that the material layer thickness in the furnace is uneven, meanwhile, the air distribution area is mainly concentrated in the middle position in the use process of the prior air distribution device, so that the air distribution is uneven, channeling and air distribution dead zones are easy to occur, insufficient cooling is caused in the falling process of the sinter, and the conditions of overhigh or overlow ore discharging temperature exist, thereby directly influencing the cooling efficiency of the sinter.
In order to solve the technical problems, the invention provides the circumferential tangential air distribution device for cooling the sinter shaft furnace, and the air distribution device supplies air to the hearth of the sinter cooling furnace, so that the defects of uneven air distribution and low cooling efficiency of the conventional air distribution device are effectively overcome, and the cooling efficiency is greatly improved.
According to one aspect of the present invention there is provided a uniform wind distribution device for sinter shaft furnace cooling, characterized by comprising:
the air supply column is arranged on the air supply column,
a hood arranged above the air supply column,
a first air supply group arranged below the hood,
a second air supply group arranged below the first air supply group, wherein,
the first air supply group comprises a plurality of first air guide pipes which are communicated with the air supply column and are used for tangentially distributing air,
the second air supply group comprises a plurality of second air guide pipes which are communicated with the air supply column and are used for tangentially distributing air,
a gap is arranged between the hood and the air supply column,
the upper surface of the blast cap is arranged in an inclined shape, so that the sintered ore can conveniently slide and disperse from the blast cap in the cooling furnace,
the plurality of first air guide pipes are arranged on the circumference of the air supply column along the tangential direction,
the plurality of second air guide pipes are arranged on the circumference of the air supply column along the tangential direction,
the first air guide pipes are arranged on the circumference of the air supply column at equal intervals at a certain angle,
the second air guide pipes are arranged on the circumference of the air supply column at equal intervals at a certain angle.
The wind distribution device comprises a wind supply column, a wind cap arranged above the wind supply column, a first wind supply group arranged below the wind cap, and a second wind supply group arranged below the first wind supply group, wherein the first wind supply group comprises a plurality of first wind guide pipes which are communicated with the wind supply column and are used for tangentially distributing wind, the second wind supply group comprises a plurality of second wind guide pipes which are communicated with the wind supply column and are used for tangentially distributing wind, gaps are reserved between the wind cap and the wind supply column, the upper surface of the wind cap is arranged in an inclined shape, so that sintered ore can conveniently slide and disperse from the wind cap in a cooling furnace, and the wind cap and the wind supply column are fixed by a steel frame to prevent the wind cap from being damaged when the sintered ore falls down downwards.
The invention can be further realized by the following technical measures:
according to the technical scheme, 360-degree tangential air distribution is realized, uniform air distribution is realized, no air distribution dead angle is generated in the using process, the fluidity of cooling air can be obviously increased, and through the arrangement, different levels of air quantity can be provided according to the thickness distribution of the whole material layer, so that the purposes of graded air distribution and uniform air distribution are achieved.
Preferably, the air distribution device comprises a vertical air supply column, the air supply column coincides with the central line of the hood, the lower end of the air supply column is used for air inlet, and the upper part of the air supply column is connected with the hood.
Preferably, the plurality of first air guide pipes of the air supply device with 360-degree tangential air distribution are arranged on the circumference of the air supply column along the tangential direction, the plurality of second air guide pipes are arranged on the circumference of the air supply column along the tangential direction, the first air guide pipes are arranged on the circumference of the air supply column at equal intervals at a certain angle, and the second air guide pipes are arranged on the circumference of the air supply column at equal intervals at a certain angle. The number of the air guide pipes and the size of the air outlets can be reasonably arranged according to actual needs.
Further, the positions of the outlets of the first air guide pipe and the second air guide pipe are overlapped with the edge positions of the hood so as to prevent the air outlet from being blocked in the process of falling of the sinter.
Furthermore, the first air guide pipes and the second air guide pipes are arranged in a staggered mode to form mutually supplementing, so that air distribution dead angles are prevented.
The invention has the following beneficial effects:
compared with the traditional arrangement mode, the conical arrangement mode can remarkably reduce accumulation at the wind distribution device in the sinter falling process, remarkably reduce the return mineral quantity and improve the quality of finished products.
The invention can realize circumferential tangential air distribution and uniform air distribution, can obviously increase the cooling range of cooling air and sinter in the cooling process of the sintering furnace, ensures that the sinter cooling process is more uniform, and has better cooling effect than the traditional air distribution device.
Because the position and the size of the air outlet of the circumferential tangential air distribution device can be calculated and adjusted according to actual design, even dispersion and rising of air flow can be realized at a lower air flow speed, so that the energy consumption is greatly reduced, meanwhile, the surface damage to the device in the sintering ore landing engineering is small, the device is not easy to be blocked, the material layers are stacked, and the working efficiency of the sintering furnace can be greatly improved.
The air distribution device disclosed by the invention is uniform in air distribution, so that the sintering ore can be cooled more quickly in the sintering furnace, the contact time of the sintering ore and cooling air is increased, the heat of the high-temperature sintering ore is taken away as much as possible, the waste heat can be recycled to the greatest extent, the maximization of the waste heat utilization is achieved, the higher energy-saving effect is achieved, and the safe and economic operation of a unit can be realized.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate the invention and together with the description serve to explain, without limitation, the invention.
FIG. 1 is a schematic view of a uniform air distribution device for sinter shaft furnace cooling, according to one embodiment of the invention.
Fig. 2 is a cross-sectional view taken along line A-A in fig. 1.
Fig. 3 is a sectional view taken along line B-B in fig. 1.
Fig. 4 is a schematic view showing the upward arrangement of the circumferential tangential air outlets according to the present invention.
Fig. 5 is a schematic view showing the downward arrangement of the circumferential tangential air outlets according to the present invention.
Detailed Description
The following describes specific embodiments of the present invention in detail with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the invention, are not intended to limit the invention.
Example 1
As shown in fig. 1, the circumferential tangential wind distribution device for cooling a sinter shaft furnace according to one embodiment of the invention is a circumferential tangential wind distribution device for cooling a sinter shaft furnace, and supplies wind to a hearth of the sinter cooling furnace through the wind distribution device, the wind distribution device comprises a wind supply column 30, a wind cap 1 arranged above the wind supply column 30, a first wind supply group 20 arranged below the wind cap 1, and a second wind supply group 21 arranged below the first wind supply group 20, wherein the first wind supply group 20 comprises a plurality of first wind guide pipes 201 which are communicated with the wind supply column 30 and tangentially distribute wind, the second wind supply group 21 comprises a plurality of second wind guide pipes 202 which are communicated with the wind supply column 30, and gaps are arranged between the wind cap 1 and the wind supply column 30, the upper surface of the wind cap 1 is arranged in an inclined shape, so that the sinter slides off the wind cap 1 and disperses in the cooling furnace, and the plurality of first wind guide pipes 201 are staggered with the plurality of second wind guide pipes 202. The air supply column 30 coincides with the central line of the hood 1, and an air inlet 31 is arranged at the lower end of the air supply column 30. The positions of the outlets of the first air guide pipe 201 and the second air guide pipe 202 are coincident with the edge position of the hood 1 so as to prevent the outlets from being blocked in the process of falling of the sinter. The hood 1 and the air supply column 30 are fixed by a steel frame 4, so that the hood is prevented from being damaged when the sinter falls down.
The working process is as follows: the cooling air enters the air distribution device through the air inlet 31 at the lower end of the air supply column 30, and is blown out through the outlets of a plurality of first air guide pipes 201 which are communicated with the air supply column 30 and are used for tangentially distributing air and a plurality of second air guide pipes 202 which are communicated with the air supply column 30 and are used for tangentially distributing air under the action of the air distribution device, so that annular air flow is formed, the uniformity of air distribution is ensured, and the rest of cooling air is blown out through the gap between the hood 1 and the air supply column 30, so that the sinter is cooled, and the heat in the high-temperature sinter is taken away.
According to the technical scheme, 360-degree tangential air distribution is realized, uniform air distribution is realized, air distribution dead angles are not generated in the using process, and the fluidity of cooling air can be obviously increased. By utilizing the technical scheme of the invention, the air quantity of different levels can be provided according to the thickness distribution of the whole material layer, so that the aim of grading air distribution and uniform air distribution is fulfilled.
Preferably, the circumferential tangential air distribution device for cooling the sinter shaft furnace according to one embodiment of the invention comprises a vertical air supply column 30, wherein the air supply column 30 coincides with the central line of the blast cap 1, the lower end of the air supply column 30 is used for air inlet, and the upper part of the air supply column is connected with the blast cap 1. The cooling air is blown out from the air inlets 31 at the lower end of the air distribution device through the air distribution device from the peripheral air outlets and gaps between the hood 1 and the air supply column 30, so that the annular air flow is formed, the air flow speed can be effectively increased, the contact area between the annular air flow and the sintering ore is increased, and the uniformity of air distribution is improved.
As shown in fig. 1, the air supply device for 360-degree tangential air distribution according to one embodiment of the present invention includes an air supply column 30 and air guide pipes 201, wherein the air guide pipes 201 are tangentially arranged around the air supply column 30 and are arranged on the air supply column 30 at a certain angle and substantially equidistant in the horizontal 360-degree direction; in one embodiment of the present invention, six air guide pipes 201 form a circumferential air supply group around the air supply column 30 at 60 degrees, and the number and positions of the circumferential air supply groups can be increased or decreased according to the needs. The number of the air guide pipes 201 in each annular air supply group and the size of the air outlets can be increased or decreased according to actual needs, so that the uniformity of air distribution is improved.
Further, in a preferred embodiment according to the present invention, the air guide pipe 201 is at an angle to the air supply column 30, and the outlet position of the air guide pipe 201 coincides with the edge position of the hood 1, so as to prevent the air outlet from being blocked during the falling process of the sinter.
In a further embodiment according to the invention, the first layer of air outlet pipes and the second layer of air outlet pipes are arranged in a staggered way to form mutually complemented air distribution dead angles.
Example 2
Referring to fig. 4, in the tangential air distribution device around a sinter shaft furnace cooling according to the embodiment of the invention, air outlets of air guide pipes in an air supply group are arranged upward, and other connection relationships are the same as in example 1.
Example 3
Referring to fig. 5, in the tangential air distribution device around a sinter shaft furnace cooling according to the embodiment of the invention, air outlets of air guide pipes in an air supply group are arranged downward, and other connection relationships are the same as in example 1.
The invention has the following beneficial effects:
compared with the traditional arrangement mode, the conical arrangement mode of the hood 1 can remarkably reduce accumulation at the wind distribution device in the sinter falling process, remarkably reduce the return mineral quantity and improve the quality of finished products.
The invention can realize circumferential tangential air distribution and uniform air distribution, can obviously increase the cooling range of cooling air and sinter in the cooling process of the sintering furnace, ensures that the sinter cooling process is more uniform, and has better cooling effect than the traditional air distribution device.
Because the position and the size of the air outlet of the circumferential tangential air distribution device are adjustable, the uniform dispersion and the rising of the air flow can be realized at a lower air flow speed, so that the energy consumption is greatly reduced, meanwhile, the surface damage to the device in the sintering ore landing engineering is small, the device is not easy to be blocked, the material layers are stacked, and the working efficiency of the sintering furnace can be greatly improved.
The air distribution device disclosed by the invention is uniform in air distribution, so that the sintering ore can be cooled more quickly in the sintering furnace, the contact time of the sintering ore and cooling air is increased, the heat of the high-temperature sintering ore is taken away as much as possible, the waste heat can be recycled to the greatest extent, the maximization of the waste heat utilization is achieved, the higher energy-saving effect is achieved, and the safe and economic operation of a unit can be realized.
Claims (7)
1. A tangential air distribution device for cooling periphery of a sinter shaft furnace, which is characterized by comprising:
an air supply column (30),
a hood (1) arranged above the air supply column (30),
a first air supply group (20) arranged below the hood (1),
a second air supply group (21) arranged below the first air supply group (20), wherein,
the first air supply group (20) comprises a plurality of first air guide pipes (201) which are communicated with the air supply column (30) and used for tangentially distributing air,
the second air supply group (21) comprises a plurality of second air guide pipes (202) which are communicated with the air supply column (30) and used for tangentially distributing air,
a gap is arranged between the hood (1) and the air supply column (30),
the upper surface of the blast cap (1) is arranged in an inclined shape, so that the sintering ore can conveniently slide and disperse from the blast cap (1) in the cooling furnace,
a plurality of first air guide pipes (201) are arranged on the circumference of the air supply column (30) along the tangential direction,
a plurality of second air guide pipes (202) are arranged on the circumference of the air supply column (30) along the tangential direction,
the first air guide pipes (201) are arranged on the circumference of the air supply column (30) at equal intervals at a certain angle,
the second air guide pipes (202) are arranged on the circumference of the air supply column (30) at equal intervals at a certain angle.
2. The sinter shaft furnace cooling circumferential tangential air distribution device according to claim 1, wherein:
the first air guide pipes (201) and the second air guide pipes (202) are arranged in a staggered mode.
3. The sinter shaft furnace cooling circumferential tangential air distribution device according to claim 1, wherein:
the air supply column (30) coincides with the central line of the hood (1), and an air inlet (31) is arranged at the lower end of the air supply column (30).
4. A sinter shaft furnace cooling circumferential tangential air distribution device as claimed in claim 3, wherein:
the positions of the outlets of the first air guide pipe (201) and the second air guide pipe (202) are overlapped with the edge position of the hood (1) so as to prevent the outlets from being blocked in the process of falling of the sinter.
5. The sinter shaft furnace cooling circumferential tangential air distribution device according to claim 1, wherein:
the blast cap (1) and the air supply column (30) are fixed by a steel frame (4) to prevent the blast cap from being damaged when the sinter falls down.
6. The sinter shaft furnace cooling circumferential tangential air distribution device according to claim 1, wherein:
the air outlet of the first air guide pipe and/or the air outlet of the second air guide pipe are/is upwards arranged.
7. The sinter shaft furnace cooling circumferential tangential air distribution device according to claim 1, wherein:
the air outlet of the first air guide pipe and/or the air outlet of the second air guide pipe are/is arranged downwards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810345441.3A CN108571885B (en) | 2018-04-17 | 2018-04-17 | Tangential wind distribution device around sinter shaft furnace cooling |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810345441.3A CN108571885B (en) | 2018-04-17 | 2018-04-17 | Tangential wind distribution device around sinter shaft furnace cooling |
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| CN108571885A CN108571885A (en) | 2018-09-25 |
| CN108571885B true CN108571885B (en) | 2023-12-15 |
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| CN110173992B (en) * | 2019-06-06 | 2020-09-25 | 韩国(株)Sti | Electric kiln |
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2018
- 2018-04-17 CN CN201810345441.3A patent/CN108571885B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2008232519A (en) * | 2007-03-20 | 2008-10-02 | Mitsubishi-Hitachi Metals Machinery Inc | Sintered ore cooling device |
| CN102345981A (en) * | 2010-08-03 | 2012-02-08 | 刘柏谦 | Sintering ore cooling device and waste heat recovery system thereof |
| JP2012088023A (en) * | 2010-10-22 | 2012-05-10 | Nippon Steel Corp | Sintered ore cooling apparatus |
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| CN108571885A (en) | 2018-09-25 |
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