CN106440874A - Coke drying system and drying method - Google Patents
Coke drying system and drying method Download PDFInfo
- Publication number
- CN106440874A CN106440874A CN201610929104.XA CN201610929104A CN106440874A CN 106440874 A CN106440874 A CN 106440874A CN 201610929104 A CN201610929104 A CN 201610929104A CN 106440874 A CN106440874 A CN 106440874A
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- China
- Prior art keywords
- coke
- inert gas
- hot
- gas
- heat
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/06—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits having a single U-bend
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B23/00—Heating arrangements
- F26B23/001—Heating arrangements using waste heat
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention provides a coke drying system. The coke drying system comprises a hot waste gas source, an outer inert gas source, a heat exchanger and a coke groove, the heat exchanger is arranged in a hot waste gas environment and communicates with the outer inert gas source and the coke groove through a gas supply pipeline and a gas inlet pipeline correspondingly, and inert gas is led into the heat exchanger. The inert gas is heated by hot waste gas flowing through the heat exchanger and formed into hot inert gas, and the hot inert gas enters the coke groove and dries coke. According to the coke drying system, the inert gas is used for absorbing waste gas residual heat, and the hot inert gas acting as a medium is used for heating and drying the coke in the inert atmosphere, so that the phenomenon that flammable impurities such as the coke, wood chips, paper and plastics are on fire and burn is avoided and system security is greatly improved; and the coke is heated and dried by the contact of the inert gas and the coke, so that secondary pollution of the coke caused by impurities such as dust, harmful sulfide and nitrogen oxide in waste gas is avoided and the purpose of drying coke in a clean way is achieved.
Description
Technical field
The invention belongs to technical field of blast furnace ironmaking is and in particular to one kind dries blast furnace use using exhaust gas of hot-blast stove heat
The drying system of coke and furnace drying method.
Background technology
Coke is requisite raw material in blast furnace iron-making process, and research shows, coke water content often increases by 1%, will increase
Increase oven coke consumption 1.1%～1.3%；When coke water content is more than 4%, then stove dust quantity substantially rises, and smooth operation of furnace is deteriorated.
Thus, dry coke, reduction smelter coke water content has significant economy, environmental protection and energy-saving benefit.At present, widely used heat
Wind furnace waste gas or sintering flue gas are as direct medium heating, drying coke.When incomplete combustion, exhaust gas of hot-blast stove and sintering cigarette
Inevitably contain carbon monoxide and oxygen in gas, and carry dust and harmful sulfide, N-oxide impurity etc., directly
When connecting into coke groove heating coke, easily cause in high temperature environments in char particle and coke own impurity for example bamboo and wood piece, paper,
The spontaneous combustion of plastics etc., causes security incident；Dust and objectionable impurities can partly be trapped in entrance blast furnace on coke, smelt iron to follow-up
Production has a negative impact.
Content of the invention
The deficiencies in the prior art in view of the above, it is an object of the invention to provide a kind of coke drying system, utilize
Heating, drying coke after waste heat in inert gas absorption exhaust gas of hot-blast stove, it is to avoid the spontaneous combustion security incident of coke and impurity.
For achieving the above object and other related purposes, technical scheme is as follows：
A kind of coke drying system, including hot waste gas source, external inert gas source, heat exchanger, coke groove, described heat exchanger
It is placed in hot waste gas environment, and connected with external inert gas source and coke groove with air inlet pipeline by supply air line respectively, institute
State and in heat exchanger, be connected with inert gas, hot waste gas flows through heat exchanger and inert gas is thermally formed hot inert gas, thermal inertia gas
Body is passed through in coke groove dries coke.
Setting heat exchanger, is absorbed waste gas residual heat using inert gas, is added under an inert atmosphere for medium with hot inert gas
Heat, dry coke, it is to avoid the ignition of the inflammable impurity such as coke and wood chip, paper, plastics, system safety is greatly improved
Property.Heating, drying coke contacted using inert gas with coke, it is to avoid dust and harmful sulfide, nitrogen oxides in waste gas
The STRENGTH ON COKE such as impurity produce secondary pollution, realize the clean purpose drying coke.
Further, described coke groove is provided with air inlet and exhaust passage, and described air inlet pipeline is provided with blower fan, thermal inertia
Gas is delivered to the air inlet of coke groove by blower fan, and described exhaust passage is connected with dehumidification deduster.
Further, the gas outlet of described dehumidification deduster connected with the supply air line of heat exchanger upstream by return line or
Directly connect with heat exchanger, so that the inert gas after dehumidification deduster dedusting is recycled.
Inert gas reenters heat exchange after purifying in heat absorption in heat exchanger, heat release in coke groove, dehumidification deduster
In device, recycle, decrease the consumption of inert gas, energy consumption is relatively low.
Further, described dehumidification deduster is padding dust catcher, and dehumidification deduster lower part outlet is connected with dust arrester.
Further, also include the waste stack/flue being connected with hot waste gas source, described heat exchanger be arranged on waste stack/
In flue.
Further, described inert gas is nitrogen.
Further, the temperature of the described hot inert gas after heat exchange is 100 DEG C～300 DEG C.
Present invention simultaneously provides a kind of coke furnace drying method, using hot waste gas as thermal source, inert gas as directly with
The waste heat of hot waste gas is transferred to inert gas using heat-exchanger rig, is existed for medium with hot inert gas by the medium of coke contact
Heating, drying coke under inert atmosphere.
Further, contact the inert gas after heat release with coke after dehumidification dedusting, be again introduced into heat-exchanger rig and changed
Heat simultaneously heats coke, such iterative cycles.
Further, the hot inert gas temperature control after heat-exchanger rig heating is at 100 DEG C～300 DEG C.
As described above, the invention has the beneficial effects as follows：The present invention utilizes inert gas to absorb waste gas residual heat, with thermal inertia gas
Body heats under an inert atmosphere, dries coke for medium, it is to avoid the catching fire of the inflammable impurity such as coke and wood chip, paper, plastics
Burning, it is to avoid in waste gas, the STRENGTH ON COKE such as dust and harmful sulfide, N-oxide impurity produces secondary pollution, reaches cleaning
Dry the purpose of coke, security of system is greatly improved.
Brief description
Fig. 1 is the structural representation of the present invention.
Piece mark explanation：
1 hot waste gas source
2 waste stacks/flue
3 heat exchangers
4 blower fans
5 coke grooves
6 dehumidification dedusters
7 outside source nitrogens
8 dust arresters
9 supply air lines
10 air inlet pipelines
11 exhaust passages
12 return line
Specific embodiment
Hereinafter embodiments of the present invention are illustrated by particular specific embodiment, those skilled in the art can be by this explanation
Content disclosed by book understands other advantages and effect of the present invention easily.
Embodiment 1
As shown in figure 1, a kind of coke drying system, including hot waste gas source 1, waste stack/flue 2, heat exchanger 3, blower fan
4th, coke groove 5, dehumidification deduster 6, outside source nitrogen 7 and dust arrester 8.Wherein, hot waste gas source 1 is selected from hot-blast stove or sintering
Machine, waste stack/flue 2 is connected with hot waste gas source 1, and heat exchanger 3 is placed in waste stack/flue 2, and outside source nitrogen 7 passes through
Supply air line 9 is connected with heat exchanger 3, and coke groove 5 is provided with air inlet and exhaust passage 11, and heat exchanger 3 passes through air inlet pipeline 10
It is connected with the air inlet of coke groove 5, coke groove 5 connects described dehumidification deduster 6 through exhaust passage 11.
It is connected with nitrogen, the nitrogen using first is supplied by outside source nitrogen 7 in heat exchanger 3.Waste gas flows through will during heat exchanger 3
Nitrogen is thermally formed 100 DEG C～300 DEG C hot nitrogens, and hot nitrogen is delivered to coke groove 5 air inlet, is passed through in coke groove 5 by blower fan 4
Dry the moisture in coke, the nitrogen after heat release and coke groove 5 and the dust-laden air-water mixture of dust formation is vented through coke groove 5
Passage 11 is delivered in dehumidification deduster 6.Dehumidification deduster 6 is preferably padding dust catcher, and padding dust catcher intercepts mixing wastewater with air
Moisture in thing and the dust sticking on air water, moisture and dust drain into dust arrester 8 through dehumidification deduster 6 lower part outlet.De-
Enter in heat exchanger 3 after cleaning nitrogen cooled via return air pipeline 12 after moisture removal and dust and supply air line 9 and again absorb heat, form one
Individual in heat exchanger 3 absorb waste gas residual heat, in coke groove 5 heat release dry coke cyclic process.Can in other embodiment
Using gases such as such as helium, neon, argon, krypton, xenon, radons, react as long as meeting and not producing with the debris of coke or coke.
The present invention utilizes inert gas to absorb waste gas residual heat, is heated under an inert atmosphere for medium with hot inert gas, dries
Dry coke, it is to avoid the ignition of the inflammable impurity such as coke and wood chip, paper, plastics, it is to avoid dust and harmful in waste gas
Sulfide, the STRENGTH ON COKE such as N-oxide impurity produce secondary pollution, reach the clean purpose drying coke, be greatly improved and be
System security.
Inert gas reenters heat exchange after purifying in heat absorption in heat exchanger, heat release in coke groove, dehumidification deduster
In device, recycle, decrease the consumption of inert gas, energy consumption is relatively low.
Any person skilled in the art all can be carried out to above-described embodiment without prejudice under the spirit and the scope of the present invention
Modifications and changes.Therefore, such as those of ordinary skill in the art without departing from disclosed spirit with
All equivalent modifications being completed under technological thought or change, must be covered by the claim of the present invention.
Claims (10)
1. a kind of coke drying system it is characterised in that：Including hot waste gas source, external inert gas source, heat exchanger, coke groove,
Described heat exchanger is placed in hot waste gas environment, and passes through supply air line and air inlet pipeline and external inert gas source and coke respectively
Groove connects, and is connected with inert gas, hot waste gas flows through heat exchanger and inert gas is thermally formed hot inert gas in described heat exchanger,
Hot inert gas are passed through in coke groove dries coke.
2. a kind of coke drying system according to claim 1 it is characterised in that：Described coke groove is provided with air inlet and row
Gas passage, described air inlet pipeline is provided with blower fan, and hot inert gas are delivered to the air inlet of coke groove, described exhaust by blower fan
Passage is connected with dehumidification deduster.
3. a kind of coke drying system according to claim 2 it is characterised in that：The gas outlet of described dehumidification deduster leads to
Cross return line to connect with heat exchanger or supply air line, so that the inert gas after dehumidification deduster dedusting is recycled.
4. a kind of coke drying system according to Claims 2 or 3 it is characterised in that：Described dehumidification deduster is filler
Deduster, dehumidification deduster lower part outlet is connected with dust arrester.
5. a kind of coke drying system according to claim 1 or 2 or 3 it is characterised in that：Also include with hot waste gas source even
Waste stack/the flue connecing, described heat exchanger is arranged in waste stack/flue.
6. a kind of coke drying system according to claim 1 it is characterised in that：Described inert gas is nitrogen.
7. a kind of coke drying system according to claim 1 it is characterised in that：Described hot inert gas after heat exchange
Temperature is 100 DEG C～300 DEG C.
8. a kind of coke furnace drying method it is characterised in that：Using hot waste gas as thermal source, inert gas is as directly connecing with coke
The waste heat of hot waste gas is transferred to inert gas using heat-exchanger rig by tactile medium, with hot inert gas for medium in indifferent gas
Heating, drying coke under atmosphere.
9. a kind of coke furnace drying method according to claim 8 it is characterised in that：Contact the indifferent gas after heat release with coke
Body, after dehumidification dedusting, is again introduced into heat-exchanger rig and carries out heat exchange and heat coke, iterative cycles.
10. a kind of coke furnace drying method according to claim 8 or claim 9 it is characterised in that：Through the heat after heat-exchanger rig heating
Inert gas temperature controls at 100 DEG C～300 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610929104.XA CN106440874A (en) | 2016-10-31 | 2016-10-31 | Coke drying system and drying method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610929104.XA CN106440874A (en) | 2016-10-31 | 2016-10-31 | Coke drying system and drying method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106440874A true CN106440874A (en) | 2017-02-22 |
Family
ID=58177236
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610929104.XA Pending CN106440874A (en) | 2016-10-31 | 2016-10-31 | Coke drying system and drying method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106440874A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108531722A (en) * | 2018-05-25 | 2018-09-14 | 盐城市联鑫钢铁有限公司 | A kind of process and equipment that prevent lateritic nickel ore from gluing storehouse and batch mixing unevenness |
| CN111457674A (en) * | 2020-05-19 | 2020-07-28 | 中冶赛迪工程技术股份有限公司 | Coke drying process and drying device |
| CN111575439A (en) * | 2020-05-28 | 2020-08-25 | 中冶赛迪技术研究中心有限公司 | Emission reduction method and system for treating waste pollutants by electric arc furnace |
| CN111952291A (en) * | 2020-08-07 | 2020-11-17 | 重庆同纳科技发展有限责任公司 | High-power LED module |
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| JP2006241536A (en) * | 2005-03-04 | 2006-09-14 | Jfe Steel Kk | Dust collection method for blast furnace ore tank |
| CN101988804A (en) * | 2010-12-09 | 2011-03-23 | 宁波钢铁有限公司 | Device and method for drying blast furnace ores and coke groove by recycling residual heat of circular cooler |
| CN101995168A (en) * | 2010-11-10 | 2011-03-30 | 甘肃众维卓越节能科技有限公司 | Method for recycling flue gas waste heat of calcium carbide furnace |
| CN203833881U (en) * | 2014-04-30 | 2014-09-17 | 肖自江 | External heating vertical type descending low-temperature pyrolysis furnace for powdered coal or oil shale powder |
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2016
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| CN101988804A (en) * | 2010-12-09 | 2011-03-23 | 宁波钢铁有限公司 | Device and method for drying blast furnace ores and coke groove by recycling residual heat of circular cooler |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108531722A (en) * | 2018-05-25 | 2018-09-14 | 盐城市联鑫钢铁有限公司 | A kind of process and equipment that prevent lateritic nickel ore from gluing storehouse and batch mixing unevenness |
| CN111457674A (en) * | 2020-05-19 | 2020-07-28 | 中冶赛迪工程技术股份有限公司 | Coke drying process and drying device |
| CN111575439A (en) * | 2020-05-28 | 2020-08-25 | 中冶赛迪技术研究中心有限公司 | Emission reduction method and system for treating waste pollutants by electric arc furnace |
| CN111952291A (en) * | 2020-08-07 | 2020-11-17 | 重庆同纳科技发展有限责任公司 | High-power LED module |
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| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20170222 |