CN107447066A - Integral type pulverized coal injection in blast furnace preheater - Google Patents
Integral type pulverized coal injection in blast furnace preheater Download PDFInfo
- Publication number
- CN107447066A CN107447066A CN201710861098.3A CN201710861098A CN107447066A CN 107447066 A CN107447066 A CN 107447066A CN 201710861098 A CN201710861098 A CN 201710861098A CN 107447066 A CN107447066 A CN 107447066A
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- Prior art keywords
- preheater
- blast furnace
- transportation pipe
- preheater body
- power transportation
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Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/001—Injecting additional fuel or reducing agents
- C21B5/003—Injection of pulverulent coal
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Air Supply (AREA)
Abstract
The present invention discloses a kind of integral type pulverized coal injection in blast furnace preheater that coal dust can be heated to 300 DEG C of high temperature above, and heat exchange efficiency can increase substantially, and the effect of energy Conservation of Blast Furnace emission reduction is more obvious, and the investment of unit heat size further reduces；The technical scheme used for：The one end side of preheater body is provided with heating medium entrance, the other end side of preheater body is provided with Crude product input, an at least power transportation pipe extends transversely through the setting of preheater body both ends, matching is provided with thermal insulation layer in side wall in preheater body cavity body, multiple preheating units have been placed equidistant between thermal insulation layer and power transportation pipe successively, and adjacent preheating unit is alternately distributed up and down, so that heating medium advances along preheater chamber body waveform, the tip inside of preheater body is connected to by compensator with the preheating unit that preheater body end is connected；It the composite can be widely applied to pulverized coal injection in blast furnace conveying device field.
Description
Technical field
Integral type pulverized coal injection in blast furnace preheater of the present invention, belong to pulverized coal injection in blast furnace conveying device technical field.
Background technology
Blast furnace blowing technology is that levigate coal dust is injected directly into blast furnace, so that alternate resources are poor, expensive metallurgical coke
Charcoal, play exothermic mixture and reducing agent, be that the burnt volume increase of iron and steel enterprise's section and improvement are smelted so as to reduce coke ratio and pig iron cost
One of maximally effective measure of technique, the pig iron that there are about more than 90% are formed by the blast furnace process of injected fuel.
With the raising of injection amount, after coal ejection ratio increases to certain limit, the amplitude that coke ratio reduces can greatly reduce, mainly
Reason be spray into coal dust completely burned, the coal gas that unknown rational number can be raised can not take raceway zone out of before air port, into
It is attached on during slag band in slag, has once added the viscosity of first slagging, is deteriorated permeability of stock column, make smooth operation of furnace unfavorable, or even have portion
Carbon granule is divided to be carried over slatterning outside stove.Therefore, combustion rate of the coal dust before air port how is improved, turns into coal ejection ratio and further improves
Key.
The mode of movement of pulverized coal injection in blast furnace has two kinds, and one kind is to use the canned special-purpose vehicle of coal dust, and one kind is to use pipeline
Geldart-D particle, wherein, Geldart-D particle continuity is good, and ability is big and good leak tightness, is that the coal dust generally used in pulverized coal injection is defeated
The mode sent.All be at present that coal dust is injected directly into blast furnace by pipeline using pipeline airvey system, spray into the coal dust of blast furnace with
More than 1100 DEG C of hot blast meets, and a process for being heated to catching fire be present, coal dust temperature is more high more is advantageous to the complete of coal dust
Burning.
In March, 2008 Fang Sheng injection technologies Co., Ltd with the peace mining industry of Shanxi the Lushui River（Group）The reality of Co., Ltd's joint application
With type " multilevel segmented heating transportation pipe for blast furnace coal injection "（Patent No. ZL200820076481.4）Patent, the patent
Disclose a kind of multilevel segmented heating transportation pipe for blast furnace coal injection.The coal dust for solving cold conditions present in injection technology is straight
The problem of connecing injection and influenceing combustion rate.But due to being using long-range single-pipeline heating indirectly, coal dust can only be heated to 160
DEG C, then it is highly difficult up to heat coal dust, it is impossible to further increase coal dust temperature, improve coal utilization.
The content of the invention
The invention overcomes the deficiencies of the prior art, and provides coal dust can be heated to 300 DEG C of high temperature above by one kind
Integral type pulverized coal injection in blast furnace preheater, heat exchange efficiency can increase substantially, and the effect of energy Conservation of Blast Furnace emission reduction is more obvious, single
Position heat size investment further reduces.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is：Integral type pulverized coal injection in blast furnace preheater,
Including preheater body and power transportation pipe, the preheater body is tubular structure closed at both ends, and the preheater
The one end side of body is provided with heating medium entrance, and the other end side of the preheater body is provided with heating medium and gone out
Mouthful, an at least power transportation pipe extends transversely through preheater body both ends and set, in the preheater body cavity body
Matching is provided with thermal insulation layer in side wall, and it is single to be placed equidistant multiple preheatings between the thermal insulation layer and power transportation pipe successively
Member, and the adjacent preheating unit is alternately distributed up and down so that heating medium advances along preheater chamber body waveform, with
The preheating unit of the preheater body end connection is connected to the tip inside of preheater body by compensator, for matching
The deformation of power transportation pipe；
The structure of the preheating unit is：Including deflector, supporting sleeve, flow distribution plate and supporting plate, the supporting plate be close to every
It is horizontally installed on the inside of thermosphere in preheater body, the supporting sleeve is sleeved on power transportation pipe, and the support set
The internal diameter of pipe is more than the external diameter of power transportation pipe, and the horizontal central plane side of the supporting sleeve is provided with deflector, described
The horizontal central plane opposite side of supporting sleeve is provided with flow distribution plate, and the deflector is vertically axially arranged with preheater body,
Heating medium is forced to change flow direction, the section of the flow distribution plate parabolically structure, by the heating medium in preheating unit
It is divided into two, it is ensured that heating dead angle is not present in the power transportation pipe in preheating unit, and the deflector and flow distribution plate are by adding
Strong plate is connected with power transportation pipe.
Temperature sensor is provided with the power transportation pipe.
Corresponding to the preheating unit expansion joint is provided with the middle part of preheater body.
The thermal insulation layer is fibre module.
The compensator is bellow expansion joint.
The present invention has an advantageous effect in that compared with prior art：High temperature hot-blast furnace flue gas warp after present invention heating
Thermal medium inlet entrance is crossed, the heat of flue gas is directly passed to coal dust by flue gas in preheating unit flow process by heat exchange
Coal dust in conveyance conduit, flue gas carry out drying coal dust after Crude product input discharge into coal pulverizer.The stream of high-temperature flue gas
Dynamic direction and coal dust conveying direction are on the contrary, this makes it possible to ensure that coal dust temperature raises step by step, and the coal dust conveying of the present invention
Device is to use multi-pipeline flow-disturbing heat-exchanger rig.Therefore the firing rate of coal dust can faster, and effect can be more preferable, can be further
Raising Combustion Efficiency of Coal Powder.The present invention is filled using integral type+water conservancy diversion+part flow arrangement heat exchange, inside holding, volume compared with prior art
Standby small by 30%, heating-up temperature can improve 50 ~ 80 DEG C, thermal efficiency increase by 27%.
Brief description of the drawings
The present invention is described further below in conjunction with the accompanying drawings.
Fig. 1 is the structural representation of the present invention.
Fig. 2 is the structural representation of preheating unit in the present invention.
Fig. 3 is the structural representation of compensator in the present invention.
In figure：1 it is preheater body, 2 be thermal medium inlet, 3 be Crude product input, 4 be power transportation pipe, 5 is
Thermal insulation layer, 6 be preheating unit, 61 be deflector, 62 be supporting sleeve, 63 be flow distribution plate, 64 be supporting plate, 65 be reinforcing plate, 7
It is temperature sensor for compensator, 8,9 is expansion joint.
Embodiment
As shown in Figure 1, Figure 2 and Figure 3, integral type pulverized coal injection in blast furnace preheater of the present invention, including preheater body 1 and coal
Powder conveyance conduit 4, the preheater body 1 is tubular structure closed at both ends, and the one end side of the preheater body 1 is set
Heating medium entrance 2 is equipped with, the other end side of the preheater body 1 is provided with Crude product input 3, at least described in one
Power transportation pipe 4 extends transversely through the both ends of preheater body 1 and set, and matches and sets in the side wall in the cavity of preheater body 1
Thermal insulation layer 5 is equipped with, multiple preheating units 6 have been placed equidistant successively between the thermal insulation layer 5 and power transportation pipe 4, and it is adjacent
The preheating unit 6 be alternately distributed up and down so that heating medium advances along the inner chamber waveform of preheater body 1, and described pre-
The preheating unit 6 of the hot end of device body 1 connection is connected to the tip inside of preheater body 1 by compensator 7, for matching coal
The deformation of powder conveyance conduit 4；
The structure of the preheating unit 6 is：Including deflector 61, supporting sleeve 62, flow distribution plate 63 and supporting plate 64, the support
Plate 64 is close to the inner side of thermal insulation layer 5 and is horizontally installed in preheater body 1, and the supporting sleeve 62 is sleeved on power transportation pipe 4
On, and the internal diameter of the supporting sleeve 62 is more than the external diameter of power transportation pipe 4, the horizontal central plane one of the supporting sleeve 62
Side is provided with deflector 61, and the horizontal central plane opposite side of the supporting sleeve 62 is provided with flow distribution plate 63, the deflector 61
It is vertically axially arranged with preheater body 1, force heating medium to change flow direction, the section of the flow distribution plate 63 is in parabolic
Cable architecture, the heating medium in preheating unit 6 is divided into two, it is ensured that the power transportation pipe 4 in preheating unit 6, which is not present, to be added
Hot dead angle, the deflector 61 and flow distribution plate 63 are connected by reinforcing plate 65 and power transportation pipe 4.
Temperature sensor 8 is provided with the power transportation pipe 4.
The middle part of preheater body 1 is provided with expansion joint 9 corresponding to the preheating unit 6, for compensating the change after being heated
Shape amount.
The thermal insulation layer 5 is fibre module.
The compensator 7 is bellow expansion joint.
The course of work of the present invention：By the coal dust flow direction in the flow direction of high-temperature medium and power transportation pipe 4
On the contrary, allowing coal dust temperature to raise step by step, while the interleaved of preheating unit 6 is set, increase high-temperature medium is in preheater body 1
The interior holdup time, and set flow distribution plate 63 that short circuit occurs when preventing high-temperature medium deflecting.
Temperature sensor 8 is provided with the power transportation pipe 4, can be to the system temperature in power transportation pipe 4
Parameter is monitored in real time.
The present invention reduces the volume of preheater body 1, saves the energy.And deflector 61 is provided with preheating unit 6,
Gas is set to be more evenly distributed.
Thermal insulation layer 5 uses heat-insulated, insulation fibre module 19 in the present invention, lifts the thermal efficiency 27%, is compensated by expansion joint 9
Deflection after the heat of preheating unit 6.
The material of power transportation pipe 4 is Wear-resistant, high-temperature resistant alloy in the present invention so that power transportation pipe 4 uses the longevity
Order longer.
Specifically, the high temperature hot-blast furnace flue gas after present invention heating enters by thermal medium inlet 5, and flue gas is single in preheating
The coal dust being directly passed to by heat exchange the heat of flue gas in first 6 flow process in power transportation pipe 4, flue gas is from heating
After the discharge of media outlet 3 drying coal dust is carried out into coal pulverizer.Flow direction and the coal dust conveying direction of high-temperature flue gas on the contrary, this
Sample is to ensure that coal dust temperature raises step by step.
The pulverized coal conveying device of the present invention is to use multi-pipeline flow-disturbing heat-exchanger rig.Therefore the firing rate of coal dust can be more
It hurry up, effect can be more preferable, can further improve Combustion Efficiency of Coal Powder.
The present invention using integral type by the shunting of heat source side gas, water conservancy diversion, heat transfer, heat-insulated and heat absorbing end coal dust heat transfer,
Conveying flow is all integrated into a body, and volume is small by 30% compared with prior art equipment, and heating-up temperature can improve 50 ~ 80 DEG C, heat
Efficiency increase by 27%.
The present invention is explained in detail above in conjunction with embodiment, but the present invention is not limited to above-described embodiment, at this
In the those of ordinary skill's possessed knowledge of field, various changes can also be made on the premise of present inventive concept is not departed from
Change.
Claims (5)
1. integral type pulverized coal injection in blast furnace preheater, it is characterised in that including preheater body（1）And power transportation pipe（4）,
The preheater body（1）For tubular structure closed at both ends, and the preheater body（1）One end side be provided with heating
Medium entrance（2）, the preheater body（1）Other end side be provided with Crude product input（3）, an at least coal
Powder conveyance conduit（4）Extend transversely through preheater body（1）Both ends are set, the preheater body（1）Side wall in cavity
With being provided with thermal insulation layer（5）, the thermal insulation layer（5）And power transportation pipe（4）Between to be placed equidistant multiple preheatings successively single
Member（6）, and the adjacent preheating unit（6）Alternately it is distributed up and down so that heat medium along preheater body（1）Inner chamber wave
Shape is advanced, with the preheater body（1）The preheating unit of end connection（6）Pass through compensator（7）It is connected to preheater body
（1）Tip inside, for matching power transportation pipe（4）Deformation；
The preheating unit（6）Structure be：Including deflector（61）, supporting sleeve（62）, flow distribution plate（63）And supporting plate
（64）, the supporting plate（64）It is close to thermal insulation layer（5）Inner side is horizontally installed on preheater body（1）It is interior, the supporting sleeve
（62）It is sleeved on power transportation pipe（4）On, and the supporting sleeve（62）Internal diameter be more than power transportation pipe（4）It is outer
Footpath, the supporting sleeve（62）Horizontal central plane side be provided with deflector（61）, the supporting sleeve（62）Level in
Heart face opposite side is provided with flow distribution plate（63）, the deflector（61）Vertically with preheater body（1）It is axially arranged, force plus
Thermal medium changes flow direction, the flow distribution plate（63）Section parabolically structure, by preheating unit（6）Interior heating medium
It is divided into two, it is ensured that preheating unit（6）Interior power transportation pipe（4）In the absence of heating dead angle, the deflector（61）With point
Flowing plate（63）Pass through reinforcing plate（65）With power transportation pipe（4）It is connected.
2. integral type pulverized coal injection in blast furnace preheater according to claim 1, it is characterised in that the power transportation pipe
（4）Inside it is provided with temperature sensor（8）.
3. integral type pulverized coal injection in blast furnace preheater according to claim 1, it is characterised in that the preheating unit（6）
Corresponding preheater body（1）Middle part be provided with expansion joint（9）.
4. integral type pulverized coal injection in blast furnace preheater according to claim 1, it is characterised in that the thermal insulation layer（5）For
Fibre module.
5. integral type pulverized coal injection in blast furnace preheater according to claim 1, it is characterised in that the compensator（7）For
Bellow expansion joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710861098.3A CN107447066B (en) | 2017-09-21 | 2017-09-21 | Integrated blast furnace pulverized coal injection preheater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710861098.3A CN107447066B (en) | 2017-09-21 | 2017-09-21 | Integrated blast furnace pulverized coal injection preheater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107447066A true CN107447066A (en) | 2017-12-08 |
| CN107447066B CN107447066B (en) | 2022-08-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710861098.3A Active CN107447066B (en) | 2017-09-21 | 2017-09-21 | Integrated blast furnace pulverized coal injection preheater |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112762742A (en) * | 2021-02-01 | 2021-05-07 | 河北三石节能环保科技有限公司 | Integral heater of blast furnace coal powder |
| CN112813211A (en) * | 2021-03-04 | 2021-05-18 | 长治市方圣喷吹技术有限公司 | High-efficient buggy preheating device |
| CN115948626A (en) * | 2023-03-13 | 2023-04-11 | 河北三石节能环保科技有限公司 | Blast furnace coal injection thermal compensation device |
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| US20130233525A1 (en) * | 2012-03-12 | 2013-09-12 | Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | Multi-flow passage device |
| CN203904371U (en) * | 2014-05-13 | 2014-10-29 | 长治市方圣喷吹技术有限公司 | Novel multi-level sectional type preheater for blast furnace jetted pulverized coal |
| CN207276638U (en) * | 2017-09-21 | 2018-04-27 | 长治市方圣喷吹技术有限公司 | A kind of integral type pulverized coal injection in blast furnace preheater |
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2017
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| EP1950272A1 (en) * | 2007-01-27 | 2008-07-30 | Robert Bosch GmbH | Method and device for thermal conversion of pellets or wood chippings |
| CN101250601A (en) * | 2008-03-07 | 2008-08-27 | 山西潞安矿业(集团)有限责任公司 | Pre-heating technique of blast furnace before blowing coal powder |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112762742A (en) * | 2021-02-01 | 2021-05-07 | 河北三石节能环保科技有限公司 | Integral heater of blast furnace coal powder |
| CN112813211A (en) * | 2021-03-04 | 2021-05-18 | 长治市方圣喷吹技术有限公司 | High-efficient buggy preheating device |
| CN115948626A (en) * | 2023-03-13 | 2023-04-11 | 河北三石节能环保科技有限公司 | Blast furnace coal injection thermal compensation device |
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| CN107447066B (en) | 2022-08-16 |
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