CN107904346A - 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
- CN107904346A CN107904346A CN201711194146.4A CN201711194146A CN107904346A CN 107904346 A CN107904346 A CN 107904346A CN 201711194146 A CN201711194146 A CN 201711194146A CN 107904346 A CN107904346 A CN 107904346A
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- China
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- shaft furnace
- stock gas
- tapping equipment
- drainage hood
- equipment according
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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)
- Vertical, Hearth, Or Arc Furnaces (AREA)
Abstract
The invention discloses a kind of shaft furnace stock gas tapping equipment, comprising drainage hood, communicating pipe and air outlet pipe, wherein, drainage hood is shrouded in shaft furnace preheating section upper end, comprising the air collecting chamber for being arranged inside and the gas collection hole for being arranged at lower surface, the internal environment of gas collection hole connection air collecting chamber and shaft furnace；Communicating pipe connects air collecting chamber and air outlet pipe；Air outlet pipe connects communicating pipe and external environment condition.The device optimizes furnace reduction air flow method by adjusting stock gas discharge process, makes gas stream in the stove, Temperature Distribution relatively uniform, effectively improves shaft furnace production efficiency, improves direct reduced iron quality.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 become the smelting technique to receive much concern.Gas-based shaft kiln is as common 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, lower part set cooling and
Discharge system.One stock gas delivery pipe connected with external environment is usually set on 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 exhaust pipe on reduction section top.However, since all also Primordial Qi are by a furnace roof coal on reduction section top
Gas delivery pipe is discharged, and is easily influenced 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, stock gas dust content is more, and subsequently washing dedusting, cooling process pressure are big,
Water consumption is big.
Therefore, it is uniformly distributed how the also Primordial Qi in stove, reduces stock gas dust content 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, it is by adjusting furnace roof
Coal gas discharge process optimizes furnace reduction air flow method, makes gas stream in the stove, Temperature Distribution relatively uniform, effectively improves shaft furnace life
Efficiency is produced, improves direct reduced iron quality.
According to a kind of shaft furnace stock gas tapping equipment of the present invention, comprising drainage hood, communicating pipe and air outlet pipe, its
In, drainage hood is shrouded in shaft furnace preheating section upper end, includes the air collecting chamber for being arranged inside and the gas collection hole for being arranged at lower surface, collection
Stomata connects the internal environment of air collecting chamber and shaft furnace；Communicating pipe connects air collecting chamber and air outlet pipe；Air outlet pipe connect communicating pipe with it is outer
Portion's environment.
Further, drainage hood has inverted bowl structure.
Further, the structure centre of drainage hood is located on the central axes of shaft furnace.
Further, multiple gas collection holes are uniformly distributed in drainage hood lower surface.
Further, air outlet pipe is arranged at shaft furnace top center.
Further, shaft furnace stock gas tapping equipment includes cloth tube, cloth tube upper end and the stove at the top of shaft furnace
Material 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.
Further, cloth tube athwart drainage hood, is connected with drainage hood intersection area by welding manner.
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 solution, the present invention has the following advantages that compared with prior art：
(1) stock gas discharger of the invention is by setting drainage hood can be by stock gas near furnace wall into shaft furnace
The heart gathers, and reducing gas is improved along furnace wall uplink phenomenon, and shaft furnace center Gas Flow and temperature are improved, during reduction
Between shorten 16~26min, productivity improve 5~10% energy consumptions reduce by 3~7kgce/t.DRI, improve shaft furnace capacity usage ratio.
(2) set intensive gas collection hole to carry out rough dedusting to stock gas, reduce stock gas dustiness 25% or so, drop
Low follow-up dedusting pressure.
(3) set drainage hood lower end to be higher than the furnace charge outlet of cloth tube lower end, the High-temperature furnace top of a part of uplink can be made
Coal gas is introduced into cloth tube and the furnace charge of downlink carries out heat exchange, then discharges with furnace charge and collected by gas collection hole.
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, 2 gas collection holes, 3 air collecting chambers, 4 communicating pipes, 5 air outlet pipes, 6 cloth tubes, 7 shaft furnaces.
Embodiment
The embodiment of the present invention is 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 has the function of same or like element.Retouched below with reference to attached drawing
The embodiment stated is exemplary, and 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, communicating pipe 4 and air outlet pipe 5.Wherein, drain
It is in inverted bowl structure that cover 1 is overall, it is shrouded in the preheating section upper end of shaft furnace 7, which includes the collection for being arranged inside
Air cavity 3 and the multiple gas collection holes 2 for being uniformly distributed in lower surface, pass through scattered collection in order to the stock gas of diverse location in stove
Stomata 2 is pooled in air collecting chamber 3.Preferably, the structure centre of drainage hood 1 is located on the central axes of shaft furnace 7, so that the gas in stove
Stream is uniformly distributed.Communicating pipe 4 connects air collecting chamber 3 with air outlet pipe 5, and then is connected by air outlet pipe 5 with external environment condition.It is preferred that
Ground, air outlet pipe 5 can be arranged at the center at the top of shaft furnace 7, smoothly be discharged easy to the stock gas in air collecting chamber 3.
Also Primordial Qi is reacted with furnace charge by entering positioned at reduction section lower end inside shaft furnace 7, is formed stock gas from bottom to top.
Stock gas reaches preheating section top and enters stock gas air collecting chamber 3 by stock gas gas collection hole 2, through stock gas communicating pipe 4,
Stock gas outlet 5 discharges shaft furnace.During stock gas discharge shaft furnace 7, drainage hood 1 is to stock gas and reducing gas
Gather effect to center with certain, make the furnace top coal quantity of discharge in each position unit interval in stove basically identical, reduction
Coal gas is improved along furnace wall uplink phenomenon, and shaft furnace center Gas Flow and temperature are improved, the temperature point of shaft furnace cross section
Cloth is more uniform, accelerates direct-reduction speed, improves shaft furnace DRI pelletizings product quality and productivity.
Further, gas collection hole 2 of the dense distribution in 1 lower surface of drainage hood has the effect of gas collection and coarse filtration concurrently at the same time,
Rough dedusting can be carried out to stock gas, reduce stock gas dustiness, to obtain cleaner stock gas, mitigated follow-up
Wash the workload of dust-removing process.
In an embodiment of the present invention, shaft furnace stock gas tapping equipment can also include cloth tube 6.The cloth tube 6
Upper end is connected with the furnace charge tripper positioned at the top of shaft furnace 7, and pellet is delivered in shaft furnace 7 from tripper；Its lower end is goed deep into
To the preheating section upper end of shaft furnace, the discharge port of stock gas from 6 bottom of cloth tube of a part of high temperature is entered in cloth tube 6
Portion, makes the stock gas of uplink carry out heat convection with the furnace charge of downlink in cloth tube 6, when charge preheating is shortened in appropriate reduction
Between.Preferably, multiple 6 upper ends of cloth tube are connected with tripper, lower end can be layered in circular uniformly arrangement number of plies N diligently >=
2, the number of every layer of cloth tube is n, 6 horizontal sextant angle α=360/n of adjacent cloth pipe.Each cloth tube 6 athwart drainage hood 1,
Its position intersected with drainage hood 1 can be connected by welding.It is further preferred that 1 lower end of drainage hood can be higher than cloth
The furnace charge outlet of 6 lower end of expects pipe, so that part High-temperature furnace top coal gas is introduced into cloth tube 6 and the furnace charge of downlink carries out hot friendship
Change, then discharge 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 are contrasted, and the results are shown in Table 1：
Table 1
Wherein, when (1) recovery time refers to the reduction needed for the DRI (direct reduced iron) for obtaining same metal rate 90%
Between；
(2) productivity refers to the productivity of unit interval.
Comparing result shows：With the shaft furnace of the prior art, the shaft furnace stock gas tapping equipment for being configured with the present invention is used
Shaft kiln directly reduced iron smelting cycle shorten 16-20min, energy consumption reduce by 3~7kgce/t.DRI, discharge stock gas dust
Content reduces 24%-27%, improves shaft furnace capacity usage ratio, realizes efficient low-consume production.
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 of the present invention and objective 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, communicating pipe and air outlet pipe, wherein,The drainage hood is shrouded in shaft furnace preheating section upper end, includes the air collecting chamber for being arranged inside and the gas collection for being arranged at lower surface Hole, the gas collection hole connect the internal environment of the air collecting chamber and the shaft furnace；The communicating pipe connects the air collecting chamber and the air outlet pipe；The air outlet pipe connects the communicating pipe 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.
- 3. shaft furnace stock gas tapping equipment according to claim 1 or 2, it is characterised in that the structure of the drainage hood Center is located on the central axes of the shaft furnace.
- 4. shaft furnace stock gas tapping equipment according to claim 1, it is characterised in that multiple gas collection holes uniformly divide It is distributed in the drainage hood lower surface.
- 5. shaft furnace stock gas tapping equipment according to claim 1, it is characterised in that the air outlet pipe is arranged at described At shaft furnace top center.
- 6. shaft furnace stock gas tapping equipment according to claim 1, it is characterised in that the shaft furnace stock gas discharge Device includes 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 to institute State the preheating section upper end of shaft furnace.
- 7. shaft furnace stock gas tapping equipment according to claim 6, it is characterised in that the drainage hood lower end is higher than institute State the furnace charge outlet of cloth tube lower end.
- 8. shaft furnace stock gas tapping equipment according to claim 6, it is characterised in that the lower end layering of the cloth tube Uniformly arrange in concentric ring-shaped.
- 9. shaft furnace stock gas tapping equipment according to claim 6, it is characterised in that the cloth tube is athwart described Drainage hood, is connected with the drainage hood intersection area by welding manner.
- 10. a kind of shaft furnace, it is characterised in that include claim 1-9 any one of them shaft furnace stock gas tapping equipments.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711194146.4A CN107904346A (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 |
|---|---|---|---|
| CN201711194146.4A CN107904346A (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 |
|---|---|
| CN107904346A true CN107904346A (en) | 2018-04-13 |
Family
ID=61848292
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711194146.4A Pending CN107904346A (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) | CN107904346A (en) |
-
2017
- 2017-11-24 CN CN201711194146.4A patent/CN107904346A/en active Pending
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