CN108517383A - Blast furnace dedusting collection device - Google Patents
Blast furnace dedusting collection device Download PDFInfo
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- CN108517383A CN108517383A CN201810605623.XA CN201810605623A CN108517383A CN 108517383 A CN108517383 A CN 108517383A CN 201810605623 A CN201810605623 A CN 201810605623A CN 108517383 A CN108517383 A CN 108517383A
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- dust hood
- absorbed
- blast furnace
- air channel
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/22—Dust arresters
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- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
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- Metallurgy (AREA)
- Organic Chemistry (AREA)
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Abstract
The present invention provides a kind of blast furnace dedusting collection devices, including：Dust hood is absorbed on top and dust hood is absorbed in two sides, it absorbs dust hood and is arranged vertically above the molten iron ditch outlet of blast furnace in top, and it pushes up absorption dust hood with the tuyere platform of blast furnace to connect, the both sides that dust hood is symmetricly set on trough in the horizontal direction are absorbed in two sides, and dust hood is absorbed close to molten iron ditch outlet in two sides；Dedusting fan absorbs dust hood with top and two sides is absorbed dust hood and are all connected with；Air curtain component, setting is absorbed on top on dust hood, air curtain component includes air channel and centrifugal blower, air channel disk is located at the periphery that dust hood is absorbed on top, bar draught is provided on the lower wall of air channel, centrifugal blower is connect with air channel, and centrifugal blower can be sprayed gas downwards by bar draught and form tubbiness air curtain, there is tubbiness air curtain sidewall opening, sidewall opening to be connected with molten iron ditch outlet.The beneficial effects of the invention are as follows the arresting efficiencies for improving flue dust at tapping hole.
Description
Technical field
The present invention relates to deduster fields, and in particular to a kind of blast furnace dedusting collection device.
Background technology
The flue dust distributed when blast furnace casting is one of steel plant's primary pollution source, in the overall process tapped a blast furnace, at tapping hole
Molten iron in generate a large amount of flue gas and entrainment of free shape dust, spray thick smoke under the influence of high pressure and temperature, herein
Flue dust be blast furnace discharge yard main dust production resource.The flue gas of tapping hole injection is high with temperature, jet power is strong, emitted dose is big,
The features such as flue dust particle size range is wide.Since the limitation of production technology, such as tapping outlet, stifled iron notch and the operating area of driving are more
The restrictive condition of aspect so that the flue dust for how effectively eliminating tapping hole becomes cast house good dedusting effect and bad key.
Under normal circumstances, smoke catching cover is mounted on the position of 2 meters of cast house platform or more, to the capture rate of flue dust with mounting height
Increase and reduces rapidly, when cast house has lateral wind or splash occurs in tapping hole, high pressure flue gas can go out smoke catching area,
Easily cause the generation of flue dust out-of-control phenomenon.
At present there are mainly three types of the domestic common smoke catching modes of operation large blast furnace tapping hole：It inhales on iron mouth top (side)
Formula, iron mouth closed chamber, iron mouth strong drawing formula.Iron mouth top (side) suction sets side-draught hood in the both sides Tie Kou, or on iron mouth
Side sets top draft hood as iron mouth smoke catching measure, and the positional distance iron mouth of dust hood is closer.Due to the exhausting of dust hood, going out
It being formd between iron mouth and dust hood one " negative pressuren zone ", the flue gas rate that tapping hole ejects decays rapidly in the area,
Air motion track changes under the action of negative pressure pipe network into dust excluding hood, is purified and is discharged by pipe network, from
And inhibit to emit outside tapping hole flue dust, reduce dust dust content in cast house.Simultaneously under the inducing action of air-flow, dust hood
Part dust and gas other than the domain of mouth region can also enter in cover and be purified.The design original intention of the smoke catching mode is considered iron
The flue gas that mouth generates traps nearby, avoids flue dust diffusion excessive.But it was verified that this mode is not to the trapping of iron mouth flue gas
Thoroughly, especially open, stifled iron notch when, flue gas trapping effect is poor.
Iron mouth closed chamber is to be sealed processing to tuyere platform lower space, is designed to be conducive to flue gas trapping
Shape forms the exhausting fume trap cover similar to " closed chamber " as tapping hole smoke catching measure.Its main feature is that trapping on the spot
Flue dust, without the division of apparent first and second dedusting concept.Because having made encapsulation process, dirt source phase to tapping hole dirt source region
To concentrating, and the wild wind for covering interior trapping is smaller, therefore iron mouth exhaust air rate is smaller than the general sides Tie Kou (top) suction hood exhaust air rate.For into
One step reinforces smoke catching effect, usually also sets a side-draught hood in the side of iron mouth closed chamber.This kind of smoke catching mode
It is preferable through practice operation effect, but open, stifled iron notch when since closed chamber is too close away from iron mouth, flue gas that iron mouth ejects is difficult
To withdraw again, flue dust is caused to have out-of-control phenomenon.Although iron mouth closed chamber have the characteristics that it is prominent, because stokehold needs cloth
Iron-smelting process mechanical equipment is set, iron mouth closed chamber is often subject to the limitation of process conditions and cannot achieve.
With the accumulation of blast furnace construction experiences, a kind of new dust removal design theory is proposed in the industry --- iron mouth strong drawing
Mode, this mode are mainly characterized by：Using the tuyere platform of lengthening broadening, the exhausting mode strength that side is inhaled plus top is inhaled is taken
Smoke evacuation, while stokehold exhausting amount is increased, the flue gas that iron mouth generates is trapped on the spot in tuyere platform region to greatest extent, not separately
If final dusting measure.But the air quantity demand of this kind design is big, and noise pollution is serious.
Invention content
The present invention provides a kind of blast furnace dedusting collection devices, to achieve the purpose that high-effective dust-removing.
The technical solution adopted by the present invention to solve the technical problems is：A kind of blast furnace dedusting collection device, including：It inhales on top
Dust hood is absorbed in dust excluding hood and two sides, and top is absorbed dust hood and is arranged vertically above the molten iron ditch outlet of blast furnace, and
Top absorbs dust hood and connects with the tuyere platform of blast furnace, and two sides absorb dust hood and are symmetricly set on the two of trough in the horizontal direction
Side, and dust hood is absorbed close to molten iron ditch outlet in two sides；Dedusting fan absorbs dust hood with top and two sides is absorbed dust hood and connected
It connects；Air curtain component, setting are absorbed on top on dust hood, and air curtain component includes air channel and centrifugal blower, and air channel disk is located at
The periphery of dust hood is absorbed on top, and bar draught is provided on the lower wall of air channel, and centrifugal blower is connect with air channel, centrifuges wind
Function is sprayed downwards gas by bar draught and forms tubbiness air curtain, and tubbiness air curtain has sidewall opening, sidewall opening and iron
Water ditch outlet is connected.
Further, the periphery formation that air channel absorbs dust hood on top has cyclic structure jaggy, indentation, there and iron
The outlet port in ditch corresponds to, and centrifugal blower is fixed at top and absorbs on dust hood and be connected to air channel.
Further, the width of notch is more than or equal to the width between the cover mouth of two sides absorption dust hoods.
Further, the extending direction of bar draught and the axial direction of air channel are identical, the length of bar draught with
The length of air channel is identical.
Further, plane is parallel with tuyere platform where the lower end of top absorption dust hood connects.
Further, it is provided with flapper at the cover mouth of top absorption dust hood.
Further, it is both provided with flapper at the cover mouth of each side absorption dust hood.
Further, centrifugal blower is frequency conversion fan.
The invention has the advantages that the exit region flue dust of the trough of blast furnace is sealed in tubbiness air curtain, simultaneously
Top is absorbed dust hood and is worked at the same time with side absorption dust hood, increases the negative pressuren zone inhaled and catch flue dust, it is therefore prevented that the diffusion of flue dust blocks
Interference of the cast house crossflow to flue dust flow field, improves the arresting efficiency of flue dust at tapping hole.
Description of the drawings
The accompanying drawings which form a part of this application are used to provide further understanding of the present invention, and of the invention shows
Meaning property embodiment and its explanation are not constituted improper limitations of the present invention for explaining the present invention.In the accompanying drawings：
Fig. 1 is the main structure diagram of the embodiment of the present invention；
Fig. 2 is the overlooking structure diagram of the embodiment of the present invention.
Reference numeral in figure：11, dust hood is absorbed on top；12, dust hood is absorbed in side；21, air channel；22, centrifugal blower；30、
Blast furnace.
Specific implementation mode
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
As depicted in figs. 1 and 2, an embodiment of the present invention provides a kind of blast furnace dedusting collection devices, including top to absorb dust hood
11, dust hood 12, dedusting fan and air curtain component are absorbed in two sides.Absorb the molten iron that dust hood 11 is arranged vertically at blast furnace in top
Above ditch outlet, and the side for pushing up absorption dust hood 11 connects with tuyere platform, and dust hoods 12 are absorbed in the horizontal direction in two sides
On be symmetricly set on trough both sides under blast furnace tuyere platform, and close to molten iron ditch outlet.Dedusting fan absorbs dirt with top
Cover 11 and two sides are absorbed dust hood 12 and are all connected with.The setting of air curtain component is absorbed on top on dust hood 11, and air curtain component includes air wind
Road 21 and centrifugal blower 22,21 disk of air channel are located at the periphery that dust hood 11 is absorbed on top, are provided on the lower wall of air channel 21
Bar draught, centrifugal blower 22 are connect by air hose with air channel 21, and centrifugal blower 22 can downwards be sprayed by bar draught
Gas (arrow direction is gas injection direction in Fig. 1) simultaneously forms tubbiness air curtain, and tubbiness air curtain has sidewall opening, sidewall opening
It is connected with blast-melted ditch outlet (tapping hole).
Above-mentioned centrifugal blower 22 is high-pressure frequency-conversion centrifugal blower, and mesohigh refers to 3KPa between 50KPa, using frequency conversion
Control, can be adjusted the flow and flow rate of high-speed flow according to site technique situation.
The exit region flue dust of the trough of blast furnace is sealed in tubbiness air curtain, while pushing up and absorbing dust hood 11 and side absorption
Dust hood 12 works at the same time, and increases the negative pressuren zone inhaled and catch flue dust, it is therefore prevented that the diffusion of flue dust has blocked cast house crossflow pair
The interference in flue dust flow field improves the arresting efficiency of flue dust at tapping hole.
It is excessive that the embodiment of the present invention can either solve the problems, such as that traditional flue dust caused by due to avoiding process facility is spread, again
It can solve the problems, such as that crossflow influences iron mouth region domain flow of flue gas track in cast house, can improve the flue dust of tapping hole
Capture rate.
Simultaneously under the premise of ensureing dust removing effects, the dedusting wind that dust hood 11 is absorbed on top and dust hood 12 is absorbed in side can be reduced
Amount reduces the energy consumption of dust pelletizing system operation, reduces Design of Dust-removing System and operation to reduce the scale of construction of dust pelletizing system
Cost.
Above-mentioned tubbiness air curtain lower end forms closed bottom end with ground or undertaking end face, and upper end is absorbed dust hood 11 with top and formed
Closed upper end, both sides absorb dust hood 12 with side and form closed side wall, i.e. flue dust can only enter simultaneously from sidewall opening (iron mouth opening)
It is trapped in the inner space of the tubbiness air curtain, absorbs dust hood 11 finally by top and side absorbs dust hood 12 and draws discharge.Wherein,
The confined space that above-mentioned air curtain is formed not is the confined space of traditional sense, is only because high-speed flow and forms gas wall and block
Flue dust overflows diffusion.
In embodiments of the present invention, air channel 21 absorbs the periphery formation tool cyclic annular knot jaggy of dust hood 11 on top
Structure, indentation, there is corresponding with blast-melted ditch outlet position, centrifugal blower 22 be fixed at top absorb dust hood 11 on and with sky
Gas air duct 21 is connected to.That is the both ends of above-mentioned air channel 21 are located at the both sides of the edge position of tapping hole, make air channel 21
The gap width size of formation is more than or equal to the width size between the cover mouth of both sides absorption dust hood 12.And air channel 21 exists
The outside of tapping hole forms the air curtain space for closing flue dust, and the shape in the air curtain space can be become according to different needs
It changes, such as round, quadrangle, polygon or irregular figure etc..
Above-mentioned air channel 21 can be integrated to be arranged absorbs the structure of dust hood 11 periphery on top, i.e. air channel 21 can be with
It is formed by the neighboring of top absorption dust hood 11 is rolled.
Preferably, the extending direction of bar draught is identical as the axial direction of air channel 21, the length of bar draught with
The length of air channel 21 is identical.Above-mentioned bar draught is the continuous mouth being opened on air channel 21, naturally it is also possible to be used
Multiple spaced discontinuous holes substitute, but the spacing distance between multiple spaced discontinuous hole should ensure that be formed
Air curtain there is no tomography or opening.
Top is absorbed dust hood 11 and is mounted on above tapping hole, since ground needs to install stokehold process facility near tapping hole
Standby, personnel activity is more, and top absorbs the mounting height of dust hood 11 and is not influence stokehold process equipment operation and blast-furnace man's work
Principle reduces mounting height as possible, i.e., it is as parallel and connected with the upper surface of tuyere platform as possible on one side to absorb dust hood 11 for top.
It is both provided with flapper at the cover mouth of each side absorption dust hood 12.Movable baffle is installed, ensures cover mouth plane
Interior draft is uniform, reduces wild wind and is pumped into, and also reduces influence of the side suction to air curtain.Preferably, top is absorbed at the cover mouth of dust hood 11
Flapper can also be provided with.
As depicted in figs. 1 and 2, when blast furnace 30 taps a blast furnace, dust hood 11 is absorbed on top and two sides are absorbed dust hood 12 and worked at the same time.
High-speed flow is pressed into hollow air channel 21 by centrifugal blower 22, and downward air curtain, tapping hole are formed by bar draught
The flue dust of ejection is stopped after encountering air curtain by air curtain, flue dust is blocked in one " closed area ", while increasing suction and catching cigarette
The negative pressuren zone of dirt, it is therefore prevented that the diffusion of flue dust has blocked cast house crossflow to improve tapping hole to the interference in flue dust flow field
Locate the arresting efficiency of flue dust.
It can be seen from the above description that the above embodiments of the present invention realize following technique effect：By blast furnace
The exit region flue dust of trough is sealed in tubbiness air curtain, while being pushed up absorption dust hood 11 and being worked at the same time with side absorption dust hood 12,
Increasing the negative pressuren zone inhaled and catch flue dust, it is therefore prevented that the diffusion of flue dust has blocked interference of the cast house crossflow to flue dust flow field,
Improve the arresting efficiency of flue dust at tapping hole.
The embodiment of the present invention can either solve the cover mouth flue dust that dust hood is absorbed on tradition top caused by due to avoiding process facility
Excessive problem is spread, and can solve the problems, such as that crossflow influences iron mouth region domain flow of flue gas track in cast house, energy
Enough improve the dust arrestment rate of tapping hole.
Simultaneously under the premise of ensureing dust removing effects, the dedusting air quantity that dust hood 12 is absorbed in side can be reduced, to reduce
The scale of construction of dust pelletizing system reduces the energy consumption of dust pelletizing system operation, reduces the cost of Design of Dust-removing System and operation.
The above, only specific embodiments of the present invention, the range that cannot be implemented with its restriction invention, so it is equivalent
The displacement of component, or according to equivalent variations made by scope of patent protection of the present invention and modification, should all still fall within what this patent was covered
Scope.In addition, between technical characteristic and technical characteristic in the present invention, between technical characteristic and technical solution, technical solution with
Use can be freely combined between technical solution.
Claims (8)
1. a kind of blast furnace dedusting collection device, which is characterized in that including：
Dust hood (11) is absorbed on top and dust hood (12) is absorbed in two sides, and the iron that dust hood (11) is arranged vertically at blast furnace is absorbed on top
Above water ditch outlet, and the side for pushing up absorption dust hood (11) connects with the tuyere platform of the blast furnace, and dirt are absorbed in two sides
Cover (12) is symmetricly set on the both sides of the trough in the horizontal direction, and dust hood (12) is absorbed close to the molten iron in two sides
Ditch outlet；
Dedusting fan absorbs dust hood (11) with top and two sides is absorbed dust hood (12) and are all connected with；
Air curtain component, setting are absorbed on top on dust hood (11), and the air curtain component includes air channel (21) and centrifugal blower
(22), air channel (21) disk is located at the periphery that dust hood (11) is absorbed on top, and bar shaped wind is provided on the lower wall of air channel (21)
Mouthful, centrifugal blower (22) is connect with air channel (21), and centrifugal blower (22) can spray gas downwards by the bar draught
And tubbiness air curtain is formed, there is the tubbiness air curtain sidewall opening, the sidewall opening to be connected with the molten iron ditch outlet.
2. blast furnace dedusting collection device according to claim 1, which is characterized in that air channel (21) absorbs dust hood on top
(11) periphery, which is formed, has cyclic structure jaggy, and the notch is corresponding with the outlet port of the trough, centrifugal blower
(22) top is fixed to absorb on dust hood (11) and be connected to air channel (21).
3. blast furnace dedusting collection device according to claim 2, which is characterized in that the width of the notch is more than or waits
Width between the cover mouth that dust hood (12) is absorbed in two sides.
4. blast furnace dedusting collection device according to claim 1, which is characterized in that the extending direction of the bar draught with
The axial direction of air channel (21) is identical, and the length of the bar draught is identical as the length of air channel (21).
5. blast furnace dedusting collection device according to claim 1, which is characterized in that absorb the lower end of dust hood (11) in the top
Place plane is parallel with the tuyere platform to connect.
6. blast furnace dedusting collection device according to claim 1, which is characterized in that set at the cover mouth of top absorption dust hood (11)
It is equipped with flapper.
7. blast furnace dedusting collection device according to claim 1, which is characterized in that absorb the cover mouth of dust hood (12) in each side
Place is both provided with flapper.
8. blast furnace dedusting collection device according to claim 1, which is characterized in that centrifugal blower (22) is frequency conversion fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810605623.XA CN108517383A (en) | 2018-06-13 | 2018-06-13 | Blast furnace dedusting collection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810605623.XA CN108517383A (en) | 2018-06-13 | 2018-06-13 | Blast furnace dedusting collection device |
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| Publication Number | Publication Date |
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| CN108517383A true CN108517383A (en) | 2018-09-11 |
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ID=63427479
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810605623.XA Pending CN108517383A (en) | 2018-06-13 | 2018-06-13 | Blast furnace dedusting collection device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110819758A (en) * | 2019-11-12 | 2020-02-21 | 中冶京诚工程技术有限公司 | Combined converter tertiary dust collecting device and converter steelmaking system |
| CN110923384A (en) * | 2019-11-30 | 2020-03-27 | 邯郸钢铁集团有限责任公司 | Plugging device for preventing dust overflow of blast furnace taphole |
| CN111172339A (en) * | 2019-12-19 | 2020-05-19 | 中冶赛迪工程技术股份有限公司 | Detachable residual iron runner dust excluding hood |
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| JPH06336603A (en) * | 1993-05-27 | 1994-12-06 | Kawasaki Steel Corp | Dust collecting device around tapping hole of blast furnace |
| CN200992557Y (en) * | 2007-01-05 | 2007-12-19 | 王京福 | Iron-smelting blast furnace iron runout place dust absorbing cover with air curtain |
| CN201495239U (en) * | 2009-08-26 | 2010-06-02 | 中冶赛迪工程技术股份有限公司 | Dust cover on blast furnace taphole. |
| CN202030780U (en) * | 2011-04-12 | 2011-11-09 | 新兴铸管股份有限公司 | Blast furnace tap-hole dust collecting housing with gas curtain device |
| CN102586522A (en) * | 2012-02-29 | 2012-07-18 | 中冶南方工程技术有限公司 | Dust hood for blast furnace tap hole |
| CN202337793U (en) * | 2011-11-28 | 2012-07-18 | 中冶东方工程技术有限公司 | Smoke guiding and dust removing device for iron notch of blast furnace |
| CN208328057U (en) * | 2018-06-13 | 2019-01-04 | 中冶京诚工程技术有限公司 | Blast furnace dedusting collection device |
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2018
- 2018-06-13 CN CN201810605623.XA patent/CN108517383A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06336603A (en) * | 1993-05-27 | 1994-12-06 | Kawasaki Steel Corp | Dust collecting device around tapping hole of blast furnace |
| CN200992557Y (en) * | 2007-01-05 | 2007-12-19 | 王京福 | Iron-smelting blast furnace iron runout place dust absorbing cover with air curtain |
| CN201495239U (en) * | 2009-08-26 | 2010-06-02 | 中冶赛迪工程技术股份有限公司 | Dust cover on blast furnace taphole. |
| CN202030780U (en) * | 2011-04-12 | 2011-11-09 | 新兴铸管股份有限公司 | Blast furnace tap-hole dust collecting housing with gas curtain device |
| CN202337793U (en) * | 2011-11-28 | 2012-07-18 | 中冶东方工程技术有限公司 | Smoke guiding and dust removing device for iron notch of blast furnace |
| CN102586522A (en) * | 2012-02-29 | 2012-07-18 | 中冶南方工程技术有限公司 | Dust hood for blast furnace tap hole |
| CN208328057U (en) * | 2018-06-13 | 2019-01-04 | 中冶京诚工程技术有限公司 | Blast furnace dedusting collection device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110819758A (en) * | 2019-11-12 | 2020-02-21 | 中冶京诚工程技术有限公司 | Combined converter tertiary dust collecting device and converter steelmaking system |
| CN110923384A (en) * | 2019-11-30 | 2020-03-27 | 邯郸钢铁集团有限责任公司 | Plugging device for preventing dust overflow of blast furnace taphole |
| CN111172339A (en) * | 2019-12-19 | 2020-05-19 | 中冶赛迪工程技术股份有限公司 | Detachable residual iron runner dust excluding hood |
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