CN105444578B - A kind of heating means of chute - Google Patents
A kind of heating means of chute Download PDFInfo
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- CN105444578B CN105444578B CN201410409541.XA CN201410409541A CN105444578B CN 105444578 B CN105444578 B CN 105444578B CN 201410409541 A CN201410409541 A CN 201410409541A CN 105444578 B CN105444578 B CN 105444578B
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- chute
- fuel
- combustion
- heating means
- metal
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Abstract
The present invention relates to metallurgical industry field, discloses a kind of heating means of chute.In the present invention, using fuel and the gaseous mixture or oxygen-enriched air containing high-concentration oxygen as combustion adjuvant, part feeding chute is sprayed into by burning, mixed combustion is carried out, utilizes mixed combustion liberated heat to realize heating and insulation to chute.In the method, the burning penetrating part for fuel and combustion adjuvant being sent into chute includes one group of spaced the coaxial metal pipe-casing gun being arranged on chute cover plate and/or metal single tube spray gun.The chute heating means of the present invention can be greatly lowered fuel consumption, improve chute firing rate and heating uniformity, and combustion product gases amount and pollutant emission can be greatly reduced.
Description
Technical field
The invention belongs to metallurgical industry field, more particularly to a kind of heating means for the chute being applied in smelting procedure.
Background technology
Chute be it is a kind of transmit the conveying equipment of liquid using difference in height and liquid deadweight, profile is generally isosceles ladder
Shape, internal generally U-shaped (high-temperature fusant is lined with refractory material with chute), length are typically slipped from several meters to tens meters
Mobilizable chute cover plate is arranged at groove top, to reduce scattering and disappearing for heat.
Caused high-temperature fusant (including copper coloured glaze, blister copper, the anode furnace copper during copper pyrometallurgy and other metallurgical smeltings
Water or other high-temperature metal melts and slag), generally to be conveyed and mistake by chute in each smelting cell processes
Cross, and chute, when high-temperature fusant passes through chute, will necessarily cool and cool down all in environment temperature, easily solidification bonds
On chute, and then product quality and production efficiency are had influence on, so needing to heat chute and be incubated, to ensure high temperature
Melt pass through and produce be normally carried out.
The heating means of conventional chute are by installing air burner on chute cover plate, passing through combustion-supporting sky both at home and abroad at present
Gas and fuel combustion exothermic heat of reaction heat chute.Air burner generally has two ways to realize the mixed of fuel and combustion air
Combination burning：One kind is premixed, i.e., air and fuel (gaseous fuel) first pass through blender and realize mixing, then are sprayed into by burner
Chute, realize burning；A kind of is that combustion air and fuel enter burner by different pipelines, and mixing is realized spraying into chute
Fuel.Either any mixed combustion, because the combustion adjuvant of use is all normal temperature air, and contain about 21% oxygen in air
Gas and 79% nitrogen and inert gas, wherein really participate in combustion reaction is 21% oxygen, 79% nitrogen and inertia
Gas does not participate in combustion reaction, but its part as high-temperature flue gas, has but taken away substantial amounts of sensible heat, has caused the combustion heat
The reduction of efficiency and the increase of fuel consumption.In addition, this combustion system is slow to the rate of heat addition of chute, the heat time is long, shadow
Manufacturing schedule is rung；Chute uneven heating is even, and the portion temperature close to burner is high, and the portion temperature away from burner is low, holds very much
Bonding and residual of the melt in chute are easily caused, influences product quality (particularly casting quality), and the residue on chute
Next round production could be carried out after being also required to cleaning, labor strength is improved and reduces production efficiency.This burning side
Formula also produces substantial amounts of flue gas, and phenomenon of burning with anger of smoldering, worker's execute-in-place environmental degradation are seen everywhere on chute.How to reduce and slip
Groove heating cost, production efficiency is improved, product quality is improved, improves execute-in-place environment, whole Copper making industry faces
Technical barrier.
The content of the invention
, should it is an object of the invention in view of the above-mentioned problems existing in the prior art, propose a kind of heating means of chute
Method consumption capable of saving fuel, improve to the firing rate and heating uniformity of chute, substantially reduce exhaust gas volumn and pollutant is arranged
Put.
In order to solve the above technical problems, the heating means of chute provided by the present invention, pass through combustion by fuel and combustion adjuvant
Burn and spray into part feeding chute, carry out mixed combustion, chute is heated using mixed combustion liberated heat, it is described combustion-supporting
Agent is gaseous mixture or oxygen-enriched air containing high-concentration oxygen.
The heating means of the chute of the present invention, be using fuel and as mixed gas of the combustion adjuvant containing high-concentration oxygen or
Person's oxygen-enriched air, by burn spray into part be sent into chute, carry out mixed combustion, release heat so as to chute carry out heating and
Insulation.It is of the prior art due to being replaced in the method for the present invention using the mixed gas containing high-concentration oxygen or oxygen-enriched air
Air reduces the nitrogen amount of bringing into, the sensible heat that total exhaust gas volumn and corresponding flue gas are taken away will significantly subtract therewith as combustion adjuvant
Few, the thermal efficiency improves, so as to fundamentally save fuel.Also, due to being greatly reduced for exhaust gas volumn, cause high-temperature flue gas
Extended residence time in chute, it is meant that flue gas and chute have more heat-exchange times, and this also subtracts to a certain extent
Lack the thermal loss that flue gas is taken away, be advantageous to the saving of fuel.Further, since oxygen is (main as the combustion product of combustion adjuvant
To be CO2And H2O combustion product (predominantly N of the relatively air) as combustion adjuvant2、CO2And H2O) heat emissivity coefficient significantly carries
Height, cause heat transmission faster, thus improve chute firing rate.
Alternatively, in the heating means of chute provided by the present invention, fuel is gaseous fuel, liquid fuel or solid combustion
Material.Wherein, gaseous fuel can be：The field of metallurgy fuel of the gaseous states such as natural gas, coal gas, liquefied petroleum gas；Liquid
Fuel can be：The field of metallurgy fuel of the liquid conditions such as heavy oil, diesel oil, coal tar, water-coal-slurry；Solid fuel can be：
The field of metallurgy fuel of the solid states such as coal, petroleum coke.In addition, in the heating means of chute provided by the present invention, as
The gaseous mixture containing high-concentration oxygen of combustion adjuvant contains the oxygen that specific volume is higher than 90%, and surplus is nitrogen and inert gas；Make
Contain the oxygen that volumetric concentration is 21%~90% for the oxygen-enriched air of combustion adjuvant, surplus is nitrogen and inert gas.Using upper
Gaseous mixture containing high-concentration oxygen or oxygen-enriched air are stated as combustion adjuvant, combustion-supporting gas fuel, liquid fuel or solid fuel can
Ensure that the present invention can reach above-mentioned significantly save fuel consumption, improve chute firing rate and being heated evenly property of chute, significantly
Reduce exhaust gas volumn and the purpose of pollutant emission.
Further, the heating means of chute provided by the present invention, further relate to enter fuel and combustion adjuvant penetrating chute
The burning of row mixed combustion sprays into the structure of part, and the specifically burning sprays into part and slipped comprising one group of spaced is arranged at
Coaxial metal pipe-casing gun in tank cover plate；Or the burning sprays into part and includes one group and spaced is arranged on chute cover plate
Metal single tube spray gun；Or the burning sprays into part and includes one group of spaced coaxial metal set being arranged on chute cover plate
Lance tube and metal single tube spray gun.
Wherein, when burning, which sprays into part, includes coaxial metal pipe-casing gun, the coaxial metal pipe-casing gun includes coaxial
The metal inner pipe and metal outer pipe being nested with, fuel and combustion adjuvant can spray into chute by the metal inner pipe or metal outer pipe respectively.
Preferably, fuel sprays into chute by inner tube, and combustion adjuvant sprays into chute by outer tube.Metal list is included when above-mentioned burning sprays into part
During lance tube, fuel and combustion adjuvant can spray into chute by different metal single tube spray guns respectively.
Specifically, the fuel in method of the invention and combustion adjuvant both can be at regular intervals by one or more tool
Coaxial metal pipe-casing gun spray into chute carry out mixed combustion, can also by have it is at regular intervals individually Fuel lance and
Combustion adjuvant spray gun (Fuel lance and combustion adjuvant spray gun can be more) sprays into chute and carries out mixed combustion, or will coaxial gold
Belong to pipe-casing gun and metal single tube spray gun is used in combination.The characteristics of coaxial metal pipe-casing gun or advantage are：Can effectively it control
Flame profile and temperature simultaneously improve chute firing rate；The characteristics of metal single tube spray gun or advantage are：Flame can be realized more
Dissipate the uniformity burnt and promote heating.When burning, which sprays into part, includes coaxial metal pipe-casing gun, preferred fuel is by inner tube
Chute is sprayed into, combustion adjuvant sprays into chute by outer tube, can control flame profile and ensure the completely burned of fuel.
The quantity of spray gun depends on the length of heating chute.Experimental data proves, the quantity of spray gun, spray gun spacing, spray gun
Pipette tips size will influence burned flame shape, the uniformity of chute temperature and the discharge of nitrogen oxides.
Compared to air nozzle of the prior art, the structure that above-mentioned burning sprays into part is especially suitable in the present invention
Fuel and combustion adjuvant are sprayed into chute and carry out mixed combustion, due to being arranged using more spray guns of a determining deviation, so that burning
Reaction can be carried out in substep disperse in chute length, so as to control the uniformity of chute heating-up temperature.
Further, the front end of coaxial metal pipe-casing gun and the metal single tube spray gun is provided with the spray gun of threaded connection
Head, control spray speed and the direction of air-flow.Speed and the direction for spraying air-flow are controlled with lance head, the air-flow of ejection can be made to exist
Controllably volume suction combustion product is thoroughly mixed before burning, so as to reduce burned flame peak temperature, improves the uniformity of heating.
Further, burning sprays into part located at chute cover plate center, and is tilted with the length direction formation of chute
Angle.The selection at angle of inclination optimizes the size according to chute, the melt depth flowed through, and the height of chute cover plate
Regulation.Control angle of inclination can make combustion reaction have enough combustion spaces, and contribute to the completely burned and temperature of fuel
Uniformity.
In terms of existing technologies, its remarkable advantage is embodiment of the present invention, contains high-concentration oxygen due to using
Gaseous mixture or oxygen-enriched air instead of air as combustion adjuvant, reduce the thermal loss that nitrogen is taken away, improve thermal effect
Rate, significantly saves fuel consumption, and experiment proof can reduce fuel consumption 40~50%；Simultaneously because employ the burning of uniqueness
Spray into part design and to burning spray into part installation site and angle optimization, improve chute firing rate and by
Thermal uniformity, reduce the idle cost caused by cleaning melt bonding and residual, reduce labor strength, improve production
Quality and production efficiency；And due to exhaust gas volumn be greatly reduced and (60~70% can be reduced) and controllable NOx emission, greatly
Improve execute-in-place environment greatly.
Brief description of the drawings
The burning that Fig. 1 is the present invention sprays into the schematic diagram that part is installed on chute cover plate；
Fig. 2 is the schematic diagram of the method heating chute in first embodiment；
Fig. 3 is the schematic diagram of the method heating chute in second embodiment；
Fig. 4 is the schematic diagram of the method heating chute in the 3rd embodiment.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, each reality below in conjunction with accompanying drawing to the present invention
The mode of applying is explained in detail.However, it will be understood by those skilled in the art that in each embodiment of the present invention,
In order that reader more fully understands the application and proposes many ins and outs.But even if without these ins and outs and base
Many variations and modification in following embodiment, each claim of the application technical side claimed can also be realized
Case.
The heating means of chute involved by the first embodiment of the present invention, using natural gas as fuel, with oxygenous
The oxygen mixture (surplus is nitrogen and inert gas) that volumetric concentration is 99.6% is used as combustion adjuvant, by above-mentioned fuel and combustion-supporting
Agent is sprayed into the feeding chute of part 6 by burning, and carries out mixed combustion, chute is added with heat caused by mixed combustion
Heat.In present embodiment, the concrete structure that burning sprays into part 6 is arranged to：It is central in the cover plate 4 for the chute 5 that length is 10 meters,
6 coaxial metal pipe-casing guns are mounted with 1.5 meters of spacing and with angle of the cover plate 4 along the length direction of chute 5 into 45 degree, should
Coaxial metal pipe-casing gun includes the metal outer pipe 1 being coaxially nested with and metal inner pipe 2, oxygen mixture are sprayed into by metal outer pipe 1
In chute, natural gas is sprayed into chute by metal inner pipe 2.Coaxial metal pipe-casing gun in present embodiment can conveniently dismounting and
Regulation spray gun stretches into the distance of chute.
Selection of the present embodiment to spray gun quantity, spray gun spacing and spray gun setting angle, depending on heating the length of chute
Degree, temperature homogeneity requirement and NOx emission requirement, and conventional air-natural gas combustion nozzle compare, and saving of fuel 40~
50%, firing rate improves 30~50%.
There are the pipette tips for determining jet-impingement speed and injection direction the spray gun front end of present embodiment, and pipette tips are connected using screw thread
Connect, the uniformity that the air velocity and direction that pipette tips spray heat influence chute, in present embodiment, coaxial metal spray gun rifle
The air velocity that head sprays is 20~250 meters per second, and emission direction sprays for direct current, the uniformity that chute heats is reached best
Effect.
In order to ensure the safety of mixed combustion, automatic ignition and flame detecting device, Suo Youjing are equipped with Fuel lance
Cross the fuel of spray gun and oxygen (oxygen-enriched air) be required for by flow control valve group and PLC automatic control system carry out flow,
The control of pressure, safety interlocking etc., subsequently into spray gun.
The heating means of chute involved by second embodiment of the present invention, using natural gas as fuel, with oxygenous
Above-mentioned fuel and combustion adjuvant are sent into chute by the oxygen that volumetric concentration is 99.6% as combustion adjuvant by the penetrating part 6 that burns
It is interior, mixed combustion is carried out, chute is heated with heat caused by mixed combustion.In present embodiment, burning sprays into part 6
Concrete structure be arranged to：In the center of cover plate 4 for the chute 5 that length is 10 meters, with 0.75 meter and with cover plate 4 along the length of chute 5
12 metal single tube spray guns 3 are installed in direction into 45 degree of angle, and combustion adjuvant oxygen and fuel natural gas are by different metal single tubes
Spray gun 3 is sprayed into chute.Metal single tube spray gun in present embodiment conveniently can dismantle and adjust the distance that spray gun stretches into chute.
Selection of the present embodiment to spray gun quantity, spray gun spacing and spray gun setting angle, depending on heating the length of chute
Degree, temperature homogeneity requirement and NOx emission requirement, and conventional air-natural gas combustion nozzle compare, and saving of fuel 40~
50%th, firing rate, which improves 30~50%, nitrogen oxides, reduces 70%.
There are the pipette tips for determining jet-impingement speed and injection direction the spray gun front end of present embodiment, and pipette tips are connected using screw thread
Connect, air velocity and direction that pipette tips spray will influence the uniformity of chute heating, and present embodiment is, the gas that pipette tips spray
Flow velocity degree is 20~250 meters per second, and emission direction sprays for direct current, the uniformity that chute heats is reached best effect.
In order to ensure the safety of mixed combustion, automatic ignition and flame detecting device, Suo Youjing are equipped with Fuel lance
Cross the fuel of spray gun and oxygen (oxygen-enriched air) be required for by flow control valve group and PLC automatic control system carry out flow,
The control of pressure, safety interlocking etc., subsequently into spray gun.
Third embodiment of the present invention is related to a kind of heating means of chute, using natural gas as fuel, with oxygenous
Fuel and combustion adjuvant are sent into chute, entered as combustion adjuvant by the oxygen that volumetric concentration is 99.6% by the penetrating part 6 that burns
Row mixed combustion, chute is heated with heat caused by mixed combustion.In present embodiment, burning sprays into the tool of part 6
Body structure setting is：In the center of cover plate 4 for the chute 5 that length is 10 meters, with 0.5 meter of spacing and with cover plate 4 along the length of chute 5
6 coaxial metal pipe-casing guns and 12 metal single tube spray guns 3 are installed in direction into 45 degree of angle, wherein, described coaxial gold
Category pipe-casing gun includes the metal outer pipe 1 being coaxially nested with and metal inner pipe 2, combustion adjuvant oxygen are sprayed into chute by metal outer pipe 1,
Fuel natural gas is sprayed into chute by metal inner pipe 2, in addition in each metal single tube spray gun 3, also there is the spray of combustion adjuvant oxygen respectively
Enter in chute.Coaxial metal pipe-casing gun and metal single tube spray gun in present embodiment can conveniently dismantle and regulation spray gun stretches into
Chute distance.
Selection of the present embodiment to spray gun quantity, spray gun spacing and spray gun setting angle, depending on heating the length of chute
Degree, temperature homogeneity requirement and NOx emission requirement, and conventional air-natural gas combustion nozzle compare, and saving of fuel 40~
50%th, firing rate, which improves 30~50%, nitrogen oxides, reduces 70%, and heating-up temperature is more uniform.
There are the pipette tips for determining jet-impingement speed and injection direction the spray gun front end of present embodiment, and pipette tips are connected using screw thread
Connect, air velocity and direction that pipette tips spray will influence the uniformity of chute heating, and present embodiment is, pipette tips air velocity
For 20~250 meters per second, emission direction sprays for direct current, the uniformity that chute heats is reached best effect.
In order to ensure the safety of mixed combustion, automatic ignition and flame detecting device, Suo Youjing are equipped with Fuel lance
Cross the fuel of spray gun and oxygen (oxygen-enriched air) be required for by flow control valve group and PLC automatic control system carry out flow,
The control of pressure, safety interlocking etc., subsequently into spray gun.
It will be understood by those skilled in the art that the respective embodiments described above are to realize the specific embodiment of the present invention,
And in actual applications, can to it, various changes can be made in the form and details, without departing from the spirit and scope of the present invention.
Claims (9)
1. a kind of heating means of chute, it is characterised in that fuel and combustion adjuvant are sprayed into part feeding chute by burning, entered
Row mixed combustion, chute is heated using mixed combustion liberated heat, the combustion adjuvant is mixed containing high-concentration oxygen
Close gas or oxygen-enriched air；
With 20~250 meters per second of speed, direct current is injected into the chute for the fuel and combustion adjuvant；
The burning sprays into part and includes one group of spaced coaxial metal pipe-casing gun being arranged on chute cover plate；Or institute
State burning penetrating part and include one group of spaced metal single tube spray gun being arranged on chute cover plate；Or the burning sprays into
Part includes one group of spaced the coaxial metal pipe-casing gun being arranged on chute cover plate and metal single tube spray gun；
The burning sprays into part located at chute cover plate center, and 45 degree of angle of inclination is formed with the length direction of chute.
2. the heating means of chute according to claim 1, it is characterised in that the fuel is gaseous fuel, liquid combustion
Material or solid fuel.
3. the heating means of chute according to claim 1, it is characterised in that in the gaseous mixture containing high-concentration oxygen
It is higher than 90% oxygen containing volumetric concentration, surplus is nitrogen and inert gas.
4. the heating means of chute according to claim 1, it is characterised in that contain volumetric concentration in the oxygen-enriched air
For 21%~90% oxygen, surplus is nitrogen and inert gas.
5. the heating means of chute according to claim 1, it is characterised in that the burning sprays into part and includes coaxial gold
When belonging to pipe-casing gun, described coaxial metal pipe-casing gun includes the metal inner pipe being coaxially nested with and metal outer pipe, the fuel
Chute is sprayed into by the metal inner pipe or metal outer pipe respectively with combustion adjuvant.
6. the heating means of chute according to claim 5, it is characterised in that the fuel is sprayed into by metal inner pipe and slipped
Groove, the combustion adjuvant spray into chute by metal outer pipe.
7. the heating means of chute according to claim 1, it is characterised in that the burning sprays into part and includes metal list
During lance tube, the fuel and combustion adjuvant spray into chute by different metal single tube spray guns respectively.
8. the heating means of chute according to claim 1, it is characterised in that the coaxial metal pipe-casing gun and described
The front end of metal single tube spray gun is provided with the lance head of threaded connection, and control sprays speed and the direction of air-flow.
9. the heating means of the chute according to any one of claim 1-8, it is characterised in that the burning sprays into part
Angle of inclination is formed located at chute cover plate center, and with the length direction of chute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410409541.XA CN105444578B (en) | 2014-08-19 | 2014-08-19 | A kind of heating means of chute |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410409541.XA CN105444578B (en) | 2014-08-19 | 2014-08-19 | A kind of heating means of chute |
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| Publication Number | Publication Date |
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| CN105444578A CN105444578A (en) | 2016-03-30 |
| CN105444578B true CN105444578B (en) | 2018-01-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410409541.XA Active CN105444578B (en) | 2014-08-19 | 2014-08-19 | A kind of heating means of chute |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107152872A (en) * | 2017-07-03 | 2017-09-12 | 大冶有色金属有限责任公司 | A kind of mixing chute for Ausmelt furnace crest of weir |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87201809U (en) * | 1987-02-09 | 1988-01-13 | 北京钢铁学院 | Finecoal-oxygen combustion spray gun |
| CN2047667U (en) * | 1989-05-27 | 1989-11-15 | 冶金工业部钢铁研究总院 | Oxygen lance for fuel |
| CN101476045A (en) * | 2009-01-14 | 2009-07-08 | 宁波金田铜业(集团)股份有限公司 | Method for smelting copper |
| NZ610985A (en) * | 2010-11-30 | 2014-09-26 | Midrex Technologies Inc | Electric furnace for producing molten metal having material recycling capability |
| CN202660558U (en) * | 2012-04-09 | 2013-01-09 | 空气化工产品有限公司 | Burner, burner component and combustion system for non-ferrous metal reverberatory furnace |
| CN202639313U (en) * | 2012-06-28 | 2013-01-02 | 昆明理工大学 | Self-heating heat-insulating chute |
| CN103639376A (en) * | 2013-12-24 | 2014-03-19 | 金隆铜业有限公司 | Copper smelting insulation chute device |
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Effective date of registration: 20160406 Address after: 200042 room C4, building 1, No. 30 North Jiangsu Road, Shanghai, Changning District, China Applicant after: CANHUA (SHANGHAI) ENERGY TECHNOLOGY CO.,LTD. Address before: Hongkong Chinese des Voeux Road No. 173 South Building Room 1708C1 Applicant before: BUFFLO TECHNOLOGY LTD. |
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Effective date of registration: 20220831 Address after: Room 8002, building C, No. 555, Dongchuan Road, Minhang District, Shanghai 201100 Patentee after: Juxiang (Shanghai) Energy Technology Co.,Ltd. Address before: Room C4, 4th Floor, Building 1, No. 30, Jiangsu North Road, Changning District, Shanghai, 200042 Patentee before: CANHUA (SHANGHAI) ENERGY TECHNOLOGY CO.,LTD. |