CN107805681A - A kind of shaft furnace stock gas tapping equipment and shaft furnace - Google Patents
A kind of shaft furnace stock gas tapping equipment and shaft furnace Download PDFInfo
- Publication number
- CN107805681A CN107805681A CN201711194093.6A CN201711194093A CN107805681A CN 107805681 A CN107805681 A CN 107805681A CN 201711194093 A CN201711194093 A CN 201711194093A CN 107805681 A CN107805681 A CN 107805681A
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- CN
- China
- Prior art keywords
- shaft furnace
- cloth tube
- furnace
- tapping equipment
- stock gas
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/02—Making spongy iron or liquid steel, by direct processes in shaft furnaces
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention discloses a kind of shaft furnace stock gas tapping equipment, comprising drainage hood, center cloth tube and escape pipe, wherein, drainage hood is shrouded in shaft furnace preheating section upper end, and is provided centrally with gas collection hole at the top of drainage hood；Center cloth tube upper end is connected with the furnace charge tripper at the top of shaft furnace, and lower end is deeply connected to the preheating section upper end of shaft furnace with the top of drainage hood, wherein, the furnace charge outlet of center cloth tube lower end overlaps with gas collection hole；Escape pipe is arranged in the side wall of center cloth tube, for connecting center cloth tube and external environment condition.The device is exchanged heat by strengthening stock gas with shaft furnace central area pelletizing, simultaneously the furnace charge by center cloth tube is defined to move filter bed purification furnace top coal gas, reach lifting shaft furnace central temperature, improve DRI quality and shaft furnace production efficiency, reduce the purpose of energy consumption.Present invention simultaneously discloses a kind of shaft furnace for including the shaft furnace stock gas tapping equipment.
Description
Technical field
The present invention relates to non-technical field of blast furnace process, more particularly to a kind of stove of non-blast furnace process gas-based reduction shaft furnace
Top coal gas tapping equipment and the shaft furnace for being configured with the device.
Background technology
Limited with the increasingly reduction and the increasingly raising of environmental consciousness, the development of blast furnace smelting technology of coking coal resource
System, non-blast furnace process turn into the smelting technique to receive much concern.Gas-based shaft kiln is as conventional non-blast furnace direct reduction equipment because of it
Pollutant discharge amount significantly reduces, water consumption is few, noise is small and has very strong competitiveness and development potentiality.
The agent structure of traditional gas-based shaft kiln generally include top loading system, middle part reduction section, bottom set cooling and
Discharge system.One stock gas delivery pipe connected with external environment is generally set in the side wall on the top of its reduction section, it is former
Gas is inputted by reduction shaft furnace section stock gas bustle pipe nozzle, and reduction reaction occurs with stove internal oxidition pelletizing in uphill process, is reached
Discharged by furnace roof coal device blast pipe on reduction section top.However, because all also Primordial Qi are by a furnace roof coal on reduction section top
Gas delivery pipe is discharged, and is easily influenceed the distribution situation of furnace reduction gas, is caused different zones temperature difference in stove larger, for example,
The stove inner rim reduction frequent temperature of flow of air is higher, and the center reduction slow temperature of flow of air is relatively low so that pelletizing degree of metalization produces
Raw fluctuation, bulk metal rate are relatively low.Secondly, shaft furnace heat loss is relatively large, wherein about 40% heat is by stock gas
Take away.
Therefore, it is uniformly distributed how the also Primordial Qi in stove, reduces stock gas powder heat loss as non-blast furnace process neck
Domain technical problem urgently to be resolved hurrily.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of shaft furnace stock gas tapping equipment, and it is by strengthening furnace roof
Coal gas is exchanged heat with shaft furnace central area pelletizing, while the furnace charge by center cloth tube is defined to move filter bed purification furnace top
Coal gas, reach lifting shaft furnace central temperature, improve DRI quality and shaft furnace production efficiency, reduce the purpose of energy consumption.
According to a kind of shaft furnace stock gas tapping equipment of the present invention, comprising drainage hood, center cloth tube and escape pipe,
Wherein, drainage hood is shrouded in shaft furnace preheating section upper end, and is provided centrally with gas collection hole at the top of drainage hood；On the cloth tube of center
Hold and be connected with the furnace charge tripper at the top of shaft furnace, lower end is deeply to the preheating section upper end of shaft furnace and the top phase of drainage hood
Even, wherein, the furnace charge outlet of center cloth tube lower end overlaps with gas collection hole；Escape pipe is arranged at the side wall of center cloth tube
On, for connecting center cloth tube and external environment condition.
Further, drainage hood has inverted bowl structure, and the structure centre of drainage hood is located at the axis of shaft furnace
On line.
Further, it is provided with filter below gas collection hole.
Further, filter includes the filter body with platform body structure and is installed on this side of filter
Cartridge filter on wall, the upper shed area of filter body are more than under shed area, and filter body and cartridge filter are common
Limit the filter cavity inside filter.
Further, cartridge filter has a loose structure, aperture 0.001-0.04mm, the density in hole for 1000-5000/
cm2。
Further, drainage hood lower end is higher than the under shed of filter body, and the area of under shed is more than gas collection
The area of mouth.
Further, shaft furnace stock gas tapping equipment includes side cloth tube, and cloth tube upper end is with being located at the top of shaft furnace
Furnace charge tripper is connected, and lower end is deeply to the preheating section upper end of shaft furnace.
Further, drainage hood lower end is higher than the furnace charge outlet of cloth tube lower end.
Further, the lower end layering of cloth tube is uniformly arranged in concentric ring-shaped.
According to a kind of shaft furnace of the present invention, it includes the shaft furnace stock gas tapping equipment of any of the above-described.
Due to being used in upper technical scheme, the present invention has the following advantages that compared with prior art：
(1) stock gas discharger of the invention is exchanged heat by strengthening stock gas with furnace charge, can improve shaft furnace center
20~40 DEG C of temperature, recovery time shorten 10~20min, and energy consumption reduces by 3~8kgce/t.DRI, and productivity ratio improves 5~10%,
Improve shaft furnace capacity usage ratio and production efficiency.
(2) set stock gas filter to carry out dust removal by filtration to stock gas, reduce stock gas dustiness 50%
Left and right, reduce follow-up dedusting pressure.
Brief description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become from the following description of the accompanying drawings of embodiments
Obviously and it is readily appreciated that, wherein：
Fig. 1 is the sectional view according to the shaft furnace stock gas tapping equipment of the present invention.
Fig. 2 is another sectional view according to the shaft furnace stock gas tapping equipment of the present invention.
Description of reference numerals：
1 drainage hood, 11 gas collection holes, 2 center cloth tubes, 21 furnace charge outlets, 3 escape pipes, 4 filter bodies, 5 filterings
Cylinder, 6 filter cavities, 7 side cloth tubes, 8 shaft furnaces.
Embodiment
Embodiments of the invention are described below in detail, the example of embodiment is shown in the drawings, wherein identical from beginning to end
Or similar label represents same or similar element or the element with same or like function.Retouched below with reference to accompanying drawing
The embodiment stated is exemplary, is only used for explaining the present invention, and is not considered as limiting the invention.
Fig. 1 and Fig. 2 shows a reality of the shaft furnace stock gas tapping equipment according to the present invention from different perspectives respectively
Apply example.In the present embodiment, shaft furnace stock gas tapping equipment includes drainage hood 1, center cloth tube 2 and escape pipe 3.Its
In, drainage hood 1 shrouds the furnace roof coal that will rise to preheating section using its inverted bowl structure in the preheating section upper end of shaft furnace 8
Gas is gathered in top, is collected by the gas collection hole 11 for being arranged at the top center of drainage hood 1.Preferably, the structure centre of drainage hood 1
On the axis of shaft furnace 8, so that the air-flow in stove is uniformly distributed.The upper end of center cloth tube 2 and the stove positioned at the top of shaft furnace 8
Material tripper is connected, and lower end is probeed into the preheating section upper end of shaft furnace 8 to be connected with the top of drainage hood 1, wherein, center cloth tube 2
The furnace charge outlet 21 of lower end should overlap with the gas collection hole at the top of drainage hood 1.Escape pipe 3 is arranged at the side wall of center cloth tube 2
On, for connecting center cloth tube 2 and external environment condition.Also Primordial Qi positioned at reduction section lower end by entering inside shaft furnace 8, from bottom to top
Reacted with furnace charge, form stock gas.Up stock gas gathered by gas skirt 1 after through gas collection hole 11 enter center cloth tube
2, heat convection is carried out with descending furnace charge in center cloth tube 2, while boiler falls the part dust carried in stock gas
Particle, discharged afterwards by escape pipe 3 outside shaft furnace 8.
Further, filter can also be set in the lower section of gas collection hole 11.In an embodiment of the present invention, filtering dress
Put comprising the filter body 4 with platform body structure and the cartridge filter 5 being installed in the side wall of filter body 4, and
Filter body 4 and cartridge filter 5 collectively define the filter cavity 6 inside filter.Compared to column structure, platform
Body structure includes the larger side wall of area, filter area is further increased, to improve the filter efficiency of stock gas.Filtering dress
The upper bottom surface and bottom surface for putting body 4 are arranged respectively to upper shed and under shed, wherein, the area of upper shed is more than under shed
Area, make angle α=30 °~60 ° of its side wall and horizontal direction, preferably 40 °~50 ° are beneficial to up furnace roof flue gas through filtering
Cylinder 5 enters in filter cavity 6；Under shed area is more than the area of furnace charge outlet 21, and the furnace charge for avoiding falling is to filter
Cause to damage.Cartridge filter 5 has loose structure, and its aperture is arranged to 0.001-0.04mm, and the density in hole is arranged to 1000-5000
Individual/cm2.Under shed through filter body 4 and the side wall of filter cylinder 5 enter filter cavity after stock gas is gathered by gas skirt 1
6, contacted with the cold stock in filter cavity 6 and center cloth tube 2 and filtered and exchanged heat, after by stock gas outlet 3 discharge
Outside shaft furnace body 8.Preferably, the lower end of drainage hood 1 is disposed above the under shed of filter body 4, so that filter cavity 6
High-temperature furnace top coal gas is contacted as soon as possible with the cold stock in center cloth tube 2.
In an embodiment of the present invention, shaft furnace stock gas tapping equipment can also include side cloth tube 7.The side cloth tube
7 upper end is connected with the furnace charge tripper positioned at the top of shaft furnace 8, and pellet is delivered in shaft furnace 8 from tripper；Its lower end is deep
Enter to the preheating section upper end of shaft furnace, the stock gas of a part of high temperature and enter side cloth from the discharging opening of the bottom of side cloth tube 7
Inside pipe 7, up stock gas is set to carry out heat convection with descending furnace charge in side cloth tube 7, appropriate reduce shortens stove
Expect preheating time.Preferably, multiple upper ends of side cloth tube 7 are connected with tripper, and lower end can be layered in circular uniform diligently
The number of plies of arranging N >=2, the number of every layer of cloth tube is n, the horizontal sextant angle β=360/n of sides adjacent cloth tube 7.Each side cloth tube
7 athwart drainage hood 1, its position intersected with drainage hood 1 can be connected by way of welding.It is further preferred that drainage hood 1
Lower end can be higher than the furnace charge outlet of the lower end of side cloth tube 7, so that part High-temperature furnace top coal gas is introduced into side cloth tube 7 with
Capable furnace charge carries out heat exchange, then discharges with furnace charge and collected by gas collection hole 2.
Using the shaft furnace and Classical Shaft Furnace for the shaft furnace stock gas tapping equipment for being configured with the present invention respectively to the ore deposit of equivalent
Stone is smelted, and the two smelting cycle, energy consumption level and productivity ratio are contrasted, as a result as shown in table 1：
Table 1
Wherein, when (1) recovery time refers to the reduction needed for the DRI (DRI) for obtaining same metal rate 90%
Between；
(2) productivity ratio refers to the productivity ratio of unit interval.
Comparing result shows：With the shaft furnace of prior art, the shaft furnace stock gas tapping equipment for being configured with the present invention is used
Shaft kiln directly reduced iron make, stock gas dustiness reduce by 40~52%, shaft furnace central area charge-temperature rise 20~35
DEG C, shaft furnace energy consumption is reduced, while alleviate follow-up cooling dust-removing process pressure.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that：Not
In the case of departing from the principle and objective of the present invention a variety of change, modification, replacement and modification can be carried out to these embodiments, this
The scope of invention is limited by claim and its equivalent.
Claims (10)
- A kind of 1. shaft furnace stock gas tapping equipment, it is characterised in that comprising drainage hood, center cloth tube and escape pipe, its In,The drainage hood is shrouded in shaft furnace preheating section upper end, and is provided centrally with gas collection hole at the top of the drainage hood；The center cloth tube upper end is connected with the furnace charge tripper at the top of the shaft furnace, and lower end is deeply to the shaft furnace Preheating section upper end is connected with the top of the drainage hood, wherein, furnace charge outlet and the collection of the center cloth tube lower end Stomata overlaps；The escape pipe is arranged in the side wall of the center cloth tube, for connecting the center cloth tube and external environment condition.
- 2. shaft furnace stock gas tapping equipment according to claim 1, it is characterised in that the drainage hood has inverted Bowl structure, and the structure centre of the drainage hood is located on the axis of the shaft furnace.
- 3. shaft furnace stock gas tapping equipment according to claim 1, it is characterised in that be provided with below the gas collection hole Filter.
- 4. shaft furnace stock gas tapping equipment according to claim 3, it is characterised in that the filter, which includes, to be had The filter body of platform body structure and the cartridge filter being installed on described this body sidewall of filter, the filter body Upper shed area be more than under shed area, the filter body and the cartridge filter are limited and filled positioned at the filtering jointly Put the filter cavity of inside.
- 5. shaft furnace stock gas tapping equipment according to claim 4, it is characterised in that the cartridge filter has porous knot Structure, aperture 0.001-0.04mm, the density in hole is 1000-5000/cm2。
- 6. shaft furnace stock gas tapping equipment according to claim 4, it is characterised in that the drainage hood lower end is higher than institute The under shed of filter body is stated, and the area of the under shed is more than the area of the collection gas port.
- 7. shaft furnace stock gas tapping equipment according to claim 1, it is characterised in that the shaft furnace stock gas discharge Device includes side cloth tube, and the cloth tube upper end is connected with the furnace charge tripper at the top of the shaft furnace, and lower end is deeply extremely The preheating section upper end of the shaft furnace.
- 8. shaft furnace stock gas tapping equipment according to claim 7, it is characterised in that the drainage hood lower end is higher than institute State the furnace charge outlet of cloth tube lower end.
- 9. shaft furnace stock gas tapping equipment according to claim 8, it is characterised in that the lower end layering of the cloth tube Uniformly arranged in concentric ring-shaped.
- 10. a kind of shaft furnace, it is characterised in that include the shaft furnace stock gas tapping equipment described in claim any one of 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711194093.6A CN107805681A (en) | 2017-11-24 | 2017-11-24 | A kind of shaft furnace stock gas tapping equipment and shaft furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711194093.6A CN107805681A (en) | 2017-11-24 | 2017-11-24 | A kind of shaft furnace stock gas tapping equipment and shaft furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107805681A true CN107805681A (en) | 2018-03-16 |
Family
ID=61581766
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711194093.6A Pending CN107805681A (en) | 2017-11-24 | 2017-11-24 | A kind of shaft furnace stock gas tapping equipment and shaft furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107805681A (en) |
-
2017
- 2017-11-24 CN CN201711194093.6A patent/CN107805681A/en active Pending
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