CN103884175A - Anode steel jaw drying furnace - Google Patents
Anode steel jaw drying furnace Download PDFInfo
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- CN103884175A CN103884175A CN201410093260.8A CN201410093260A CN103884175A CN 103884175 A CN103884175 A CN 103884175A CN 201410093260 A CN201410093260 A CN 201410093260A CN 103884175 A CN103884175 A CN 103884175A
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- anode steel
- steel claw
- drying oven
- gas
- furnace
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- 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
- Y02P10/10—Reduction of greenhouse gas [GHG] emissions
- Y02P10/143—Reduction of greenhouse gas [GHG] emissions of methane [CH4]
Abstract
The invention discloses a special drying furnace which is used for drying an anode steel jaw in the electrolytic aluminum industry and composed of a furnace body manufactured through a furnace frame and refractory bricks. An anode steel jaw drying furnace comprises a channel-shaped furnace cavity provided with a top opening and arranged in the furnace body manufactured through the furnace frame and the refractory bricks. The two side walls of the furnace cavity are evenly provided with gas combustion burners, especially natural gas self-air-suction burners. The anode steel jaw drying furnace has the advantages of being simple and compact in structure, high in drying efficiency, low in operation cost and the like.
Description
Technical field
The present invention relates to a kind of special combustion furnace, is a kind of for drying anode steel claw that aluminum electrolysis industry uses exactly, includes the dedicated drying stove of the body of heater that grate and refractory brick makes.
Background technology
In aluminum smelting technology industry production, when the anode steel claw ferrophosphorus ring in prd-baked Al electrolysis anode assembling production process burns note, anode steel claw must dip in graphite operation before assembling with anode block, to improve the electric conductivity between steel pawl and carbon piece.Meanwhile, facilitate the pressure-off again of ferrophosphorus ring.Owing to containing water or kerosene in the pasty state graphite paint being moistened with on steel pawl head, the rapid burning expansion of meeting of being heated, can cause the problems such as iron liquid splashes, and flame is surging, and flue gas is dense, impact safety in production and contaminated environment.Therefore, in existing technique, need the steel pawl to being moistened with graphite to carry out heating, drying.Prior art adopts medium-frequency electrical heating mode to dry anode steel claw more.The ubiquitous problem of prior art is that electrothermal efficiency is low, and operating cost is high, and control system is loaded down with trivial details, easily break down, and the normal production of impact etc.The current domestic research that patented technology relates to above problem that there is no, but in other industry, there is the stoving process that adopts Hot-blast Heating mode to carry out, but due to the mode of hot-air seasoning, and the efficiency of this oven dry is extremely low, therefore the oven dry operation of complete inapplicable anode steel claw workpiece.
Summary of the invention
The invention provides a kind of anode steel claw drying oven that can effectively dry anode steel claw that overcomes prior art deficiency.
Anode steel claw drying oven of the present invention, comprising: in the body of heater that the body of heater that grate and refractory brick are made is made at refractory brick, be provided with top and be the furnace chamber of uncovered tunnel-shaped, be evenly provided with fuel gas buring burner at two sidewalls of furnace chamber.
In anode steel claw drying oven of the present invention, make the firebreak perpendicular with tunnel-shaped furnace chamber sidewall with refractory material respectively at the two ends of tunnel-shaped furnace chamber, between two firebreaks, leaving one can be for the pass of anode steel claw turnover.Adopt this technical scheme can promote the temperature in tunnel-shaped furnace chamber, reduce the consumption of fuel.
In anode steel claw drying oven of the present invention, the fuel burner nozzle arranging on two sidewalls of furnace chamber is staggered in arrangement at interval respectively.
The fuel gas buring burner of anode steel claw drying oven furnace chamber sidewall of the present invention setting is that natural gas self-suction air burning is chewed.
The combustion gas skirt that it is contraction section that the self-suction air burning of anode steel claw drying oven of the present invention is chewed by its downstream setting gradually on same axis, its upstream is that curved surface contraction section, middle reaches are the trunnion composition of straightway, contracted downstream section, be provided with combustion air entrance in combustion gas skirt periphery, the downstream end of combustion gas skirt is positioned at the porch of trunnion upstream, wherein skirt end contraction mouth area is 1:25 with trunnion upstream arrival end area ratio, to guarantee that combustion air has sufficient suction space; Trunnion middle reaches straightway area is 0.7 times of upstream arrival end area, and length of throat is 8~10 times of straightway diameter, to guarantee that combustion gas can fully mix with combustion air; Trunnion distal opening area is 0.7 times of straightway area, can make like this flame concentrate, and have certain rigidity.Each self-suction air of anode steel claw drying oven of the present invention burns to chew and is provided with flame detector, igniter and quick closing type security solenoid valve.
The invention has the advantages that:
1, the present invention is take natural gas as fuel, and the drying mode that relies on the flame forming after burning to toast oven dry to being moistened with the steel pawl of graphite replaces original drying mode with medium-frequency electrical heating.There is the outstanding advantages such as simple and compact equipment structure, drying efficiency is high, operating cost is low.
2, the present invention, owing to adopting air draught to burn the combustion system of chewing with self-suction air, does not need air blast thereby without power consumption, chews the design feature of self and open combustion space because burning simultaneously, makes combustion air abundance, sufficient combustion, thus save combustion gas.In addition, the combustion gas adopting in embodiments of the invention is natural gas, because the main combustion product of natural gas is water and carbon dioxide, does not therefore have the impact on environment, is suitable for applying.
3, the present invention can adopt the supply of material of electromechanical integration assembly type, compact conformation, and floor space is little, and be convenient to move, valve group part is directly contained on the support of body of heater below, and leaves Quick connector for combustion gas, after equipment is in place, access combustion gas and switch on power after can come into operation.
4, the present invention can arrange independent operation switch board, can realize the Automatic Control of combustion process and the manual adjustments pattern of Load Regulation.
5, in the present invention, security solenoid valve is only arranged in main supply air line, chews manual load adjusting valve is only set in the arm being connected with each burning.
6, in the present invention, Shao Zuiwei interval, both sides is staggered in arrangement, and only configures a burning torch, opens successively after each burning is chewed hand valve and ignites, and the burner that this interval is staggered in arrangement simultaneously can be avoided the mutual interference effect of relative burner in operation.
7, self-suction air of the present invention burns to chew and both can guarantee the fully mixed combustion of combustion gas and combustion air, can make flame concentrate simultaneously, makes flame have certain rigidity.
8, device of the present invention, changes to burn and chews, and can use other fuel gas, therefore goes for different combustion gas.
Accompanying drawing explanation
Accompanying drawing 1 is typical structure generalized section of the present invention.Wherein: 1 is furnace body support; 2 is the main air supply pipe of natural gas; 3 for being dispensed to the combustion gas arm that each burning is chewed; 4 is metal hose; 5 chew for self-suction air burns; 6 is body of heater backplate; 7 is heat-insulation layer; 8 is flame retardant coating; 9 for running on the steel pawl in burner hearth.
Accompanying drawing 2 is typical process principal diagram intention of the present invention.Wherein 10 is fuel gas ventilation valve; 11 is burning torch; 12 is lighting valve group; 13 is fuel gas shutoff and total load control valve group; 14 is steam supply valve group; 15 is Quick joint for gas combustion; 16 is burning control cabinet; 17 is flame detection tabs; 18 chew load adjusting valve for burning; 19 is instrument.
Accompanying drawing 3 burns the generalized section of chewing for self-suction air.Wherein 20 is natural gas injection pipe, and 21 is combustion air suction trunnion.
The specific embodiment
Below in conjunction with drawings and Examples, the present invention is explained orally in detail.
As seen from Figure 1, anode steel claw drying oven of the present invention its underpart is to form furnace body support 1 with shaped steel, the body of heater of making for refractory brick on furnace body support 1, the sidewall of the furnace body 8 that wherein refractory brick 7 is made is outside equipped with body of heater backplate 6, between two sidewall of the furnace body, form the furnace chamber that its top is open channels shape, the length of furnace chamber can be determined according to the quantity of the anode of drying.Between two firebreaks of firebreak that sidewall of the furnace body is made with refractory brick respectively and tunnel-shaped furnace chamber sidewall is perpendicular at furnace chamber two ends, forming one can be for the pass of anode steel claw turnover.On two sidewalls of furnace chamber, be evenly provided with respectively fuel gas buring burner 5, and the fuel burner nozzle arranging on two sidewalls is staggered in arrangement at interval respectively, for example on left furnace wall, burner arranges by 1,3,5 positions, and the burner on right furnace wall arranges by 2,4,6 positions.
From accompanying drawing 2, in main air supply pipe, be provided with the snap joint being connected with source of the gas, the effect one of diffusion valve 10 is emptying air in the time accessing combustion gas first, the 2nd, and the natural gas accumulating in pipeline between emptying manual modulation valve 18 and gas cut off valve where necessary, to guarantee safety.By steam supply valve group 14 fuel gas shutoffs and total load control valve group 13, igniter 12, burning torch 11, flame detecting device 17 and instrument 19, form combustion control system with control cabinet 16, realizes the automatic safety control of steel pawl drying oven automatic ignition and combustion process.Its principle is that igniter 12 starts when pressing after button ignition switch in control cabinet 16, and burning torch 11 is worked, and opens to burn simultaneously and chews air intake valve 18, completes igniting.In the time that flame detecting device 17 detects flare up fire, feed back to gas cut off valve 13, and make it be held open state, complete ignition process, and open successively each burning and chew manual load adjusting valve, ignite mutually, make steel pawl drying oven enter duty.Otherwise in the time of loss of ignition or when flame detecting device 17 can't detect flare up fire, safety cut-off magnetic valve 13 will automatically cut out in 2 seconds, cut off natural gas supply, thereby guarantee security of system.While again igniting, repeat above program.
Because the concrete combustion gas using of the present embodiment is natural gas, therefore the concrete fuel burner nozzle 5 using is natural gas combustion nozzles, and is that a kind of self-suction air burning is chewed, and its structure is referring to Fig. 3.As seen from Figure 3, the combustion gas skirt 20 that it is contraction section that this self-suction air burning is chewed by its downstream setting gradually on same axis, its upstream is that curved surface contraction section, middle reaches are that the trunnion 21 of straightway, contracted downstream section forms, be provided with combustion air entrance in combustion gas skirt periphery, the downstream end of combustion gas skirt is positioned at the porch of trunnion upstream.Arbitrary anode steel claw drying oven according to claim 5, it is characterized in that self-suction air burns the combustion gas skirt that to chew by its downstream setting gradually on same axis be contraction section, its upstream is that curved surface contraction section, middle reaches are the trunnion composition of straightway, contracted downstream section, be provided with combustion air entrance in combustion gas skirt periphery, the downstream end of combustion gas skirt is positioned at the porch of trunnion upstream.Wherein skirt end contraction mouth area is 1:25 with trunnion upstream arrival end area ratio, to guarantee that combustion air has sufficient suction space; Trunnion middle reaches straightway area is 0.7 times of upstream arrival end area, and length of throat is 8~10 times of straightway diameter, to guarantee that combustion gas can fully mix with combustion air; Trunnion distal opening area is 0.7 times of straightway area, can make like this flame concentrate, and have certain rigidity.
The concrete applicable cases of embodiments of the invention is as follows:
Referring to accompanying drawing 1, natural gas is accessed by main air supply pipe 2 as fuel gas, be transported to each self-suction air burning through each dispensing branch 3 and chew 5, self-suction air burns chews 5 both sides that are arranged on the furnace wall 8 being made up of body of heater backplate 6, fire brick layer 7, after self-suction air burns and chews and light a fire successfully, opening successively all the other each burnings chews valve and mutually ignites, become flame at freeze profile, anode steel claw 9 hangs on the guide rail arranging separately above body of heater, it is positioned on the axis direction of burner hearth center, from A-P on schedule in 30 seconds by burner hearth and complete drying course.
From accompanying drawing 3, the self-suction air structure that the present embodiment is selected is that the importing of combustion air is because prevention of natural gas ejected pipe 20 is under the ejector action of trunnion 21 mouth of pipe places generation, automatically sucks combustion air, and completes combustion process, without process air blast.
Claims (7)
1. anode steel claw drying oven, comprising: the body of heater that furnace body support and refractory brick are made, it is characterized in that being provided with in body of heater that refractory brick makes top and be the furnace chamber of uncovered tunnel-shaped, and arrange and evenly have fuel gas buring burner at two sidewalls of furnace chamber.
2. anode steel claw drying oven according to claim 1, is characterized in that making the firebreak perpendicular with tunnel-shaped furnace chamber sidewall with refractory material respectively at the two ends of tunnel-shaped furnace chamber, and between two firebreaks, leaving one can be for the pass of anode steel claw turnover.
3. anode steel claw drying oven according to claim 2, is characterized in that the fuel burner nozzle arranging on two sidewalls of furnace chamber is staggered in arrangement at interval respectively.
4. anode steel claw drying oven according to claim 3, the controller for gas that it is characterized in that fuel burner nozzle by fuel gas ventilation valve, burning torch, lighting valve group, 13 is for fuel gas shutoff and total load control valve group, steam supply valve group, burning control cabinet, flame detection tabs and burning is chewed load adjusting valve, instrumentation forms, between gas header pipe and institute source of the gas, be connected with Quick joint for gas combustion.
5. according to the arbitrary anode steel claw drying oven described in claim 1 to 4, it is characterized in that at the fuel gas buring burner of furnace chamber sidewall setting being that self-suction air burning is chewed.
6. arbitrary anode steel claw drying oven according to claim 5, it is characterized in that self-suction air burns the combustion gas skirt that to chew by its downstream setting gradually on same axis be contraction section, its upstream is curved surface contraction section, middle reaches are straightway, the trunnion composition of contracted downstream section, be provided with combustion air entrance in combustion gas skirt periphery, the downstream end of combustion gas skirt is positioned at the porch of trunnion upstream, wherein skirt end contraction mouth area is 1:25 with trunnion upstream arrival end area ratio, trunnion middle reaches straightway area is 0.7 times of upstream arrival end area, length of throat is 8~10 times of straightway diameter, trunnion distal opening area is 0.7 times of straightway area.
7. arbitrary anode steel claw drying oven according to claim 6, the each self-suction air of its feature burns to chew and is provided with flame detector, igniter and quick closing type security solenoid valve.
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CN201410093260.8A CN103884175A (en) | 2014-03-14 | 2014-03-14 | Anode steel jaw drying furnace |
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CN201410093260.8A CN103884175A (en) | 2014-03-14 | 2014-03-14 | Anode steel jaw drying furnace |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105387695A (en) * | 2015-12-07 | 2016-03-09 | 中冶南方(武汉)威仕工业炉有限公司 | Dryer for transfer grab bucket |
Citations (8)
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US5182869A (en) * | 1990-10-24 | 1993-02-02 | Westfalia Becorit Industrietechnik Gmbh | Apparatus for cooling spent anodes of electrolytic melting baths |
RU2229663C1 (en) * | 2003-06-26 | 2004-05-27 | Общество с ограниченной ответственностью "Инженерно-технологический центр" | Method for drying briquetted materials |
CN2653407Y (en) * | 2003-10-16 | 2004-11-03 | 韦力 | Electric induction heating drier |
CN201047697Y (en) * | 2007-06-05 | 2008-04-16 | 沈阳铝镁设计研究院 | Steel claw drying device |
CN101799208A (en) * | 2009-12-04 | 2010-08-11 | 攀枝花市农林科学研究院 | Carbon-hydrogen organic substance fuel baking device |
CN202849564U (en) * | 2012-09-21 | 2013-04-03 | 林州市林丰铝电有限责任公司 | Anode steel claw for aluminum electrolysis |
CN203163478U (en) * | 2013-01-23 | 2013-08-28 | 张志法 | Novel energy-saving kiln |
CN203798192U (en) * | 2014-03-14 | 2014-08-27 | 兰州泰得燃烧设备工程有限公司 | Drying furnace for anode steel claws |
-
2014
- 2014-03-14 CN CN201410093260.8A patent/CN103884175A/en active Pending
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5182869A (en) * | 1990-10-24 | 1993-02-02 | Westfalia Becorit Industrietechnik Gmbh | Apparatus for cooling spent anodes of electrolytic melting baths |
RU2229663C1 (en) * | 2003-06-26 | 2004-05-27 | Общество с ограниченной ответственностью "Инженерно-технологический центр" | Method for drying briquetted materials |
CN2653407Y (en) * | 2003-10-16 | 2004-11-03 | 韦力 | Electric induction heating drier |
CN201047697Y (en) * | 2007-06-05 | 2008-04-16 | 沈阳铝镁设计研究院 | Steel claw drying device |
CN101799208A (en) * | 2009-12-04 | 2010-08-11 | 攀枝花市农林科学研究院 | Carbon-hydrogen organic substance fuel baking device |
CN202849564U (en) * | 2012-09-21 | 2013-04-03 | 林州市林丰铝电有限责任公司 | Anode steel claw for aluminum electrolysis |
CN203163478U (en) * | 2013-01-23 | 2013-08-28 | 张志法 | Novel energy-saving kiln |
CN203798192U (en) * | 2014-03-14 | 2014-08-27 | 兰州泰得燃烧设备工程有限公司 | Drying furnace for anode steel claws |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105387695A (en) * | 2015-12-07 | 2016-03-09 | 中冶南方(武汉)威仕工业炉有限公司 | Dryer for transfer grab bucket |
CN105387695B (en) * | 2015-12-07 | 2018-01-23 | 中冶南方(武汉)威仕工业炉有限公司 | One kind transfer grab bucket baker |
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Application publication date: 20140625 |