CN104726685B - A kind of comburent air duct and the stainless steel cover type annealing furnace being provided with this comburent air duct - Google Patents
A kind of comburent air duct and the stainless steel cover type annealing furnace being provided with this comburent air duct Download PDFInfo
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- CN104726685B CN104726685B CN201510074937.8A CN201510074937A CN104726685B CN 104726685 B CN104726685 B CN 104726685B CN 201510074937 A CN201510074937 A CN 201510074937A CN 104726685 B CN104726685 B CN 104726685B
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- air duct
- comburent air
- sleeve pipe
- comburent
- heat exchanger
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
- C21D9/663—Bell-type furnaces
- C21D9/673—Details, accessories, or equipment peculiar to bell-type furnaces
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
- C21D9/663—Bell-type furnaces
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
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- Heat Treatment Of Articles (AREA)
Abstract
A kind of comburent air duct and the stainless steel cover type annealing furnace being provided with this comburent air duct.The invention discloses a kind of comburent air duct it is characterised in that：Including top comburent air duct, bottom comburent air duct, top comburent air duct sleeve pipe and bottom comburent air duct sleeve pipe, one end of this bottom comburent air duct sleeve pipe is tightly connected with bottom comburent air duct one end, the other end of this bottom comburent air duct sleeve pipe and the mutual fit in top comburent air duct one end, one end of this top comburent air duct sleeve pipe is tightly connected with top comburent air duct one end, the other end of this top comburent air duct sleeve pipe is tightly connected with the outer wall of bottom comburent air duct sleeve pipe, and the length setting of top comburent air duct sleeve pipe and bottom comburent air duct sleeve pipe does not affect freely extending of top comburent air duct one end of being led to by combustion air and bottom comburent air duct one end.
Description
Technical field
The present invention relates to a kind of Magnetic Activated equipment of water body.
Background technology
In cold-rolling stainless steel strip production process, it is stainless-steel roll that bell type annealing furnace is generally used for hot rolling 400, special
It is not the annealing of 430 steel grades, and protective atmosphere is done using 100% hydrogen.The equipment of separate unit bell type annealing furnace forms mainly to have and adds
Heat cover 1 ', inner cover 5 ', cooling dome, table, valve station and final cooling table etc..Wherein, in heating mantles 1 ', maximum operating temperature is 970
DEG C, inner cover 5 ' maximum operating temperature is 870 DEG C, strip steel 870 DEG C of maximum temperature of annealing.The heating normally gaseous fuel of medium, such as
LPG or natural gas or coke-stove gas etc..The blower fan that combustion air is carried by heating mantles 1 ' directly extracts from bell type annealing furnace workshop
And the high-temperature flue gas being produced with burning are carried out heat exchange 4 ' and enter burner afterwards.
Larger gas heating mantles 1 ' is typically disposed with two rows burner, is lower floor's burner 31 ' and upper strata burner respectively
32 ', often arranging has 6 burners, as shown in Figure 1.The high-temperature flue gas producing after burning are discharged above heating mantles 1 '.Adopt before discharge
Preheat cold conditions combustion air with heat exchanger 4 ' and reduce flue-gas temperature.Heat exchanger 4 ' and comburent air duct 2 ' have built-in knot
Structure and two kinds of arrangements of outlet structure.In built-in structure, heat exchanger 4 ' and comburent air duct 2 ' are arranged in and add
Heat cover 1 ' enclosure is simultaneously wrapped up with refractory material, and this refractory material is generally fibre module.
As shown in Fig. 2 comburent air duct 2 ' upper and lower end is welded with heat exchanger 4 ' and burner protective case 8 ' respectively.Heat
Exchanger 4 ' is made up of shell 42 ' and body 41 ', and shell 42 ' is arranged on heating mantles 1 ' inside, exchanger 4 ' body 41 ' top
It is connected with cold-air duct 6 '.High-temperature flue gas pass through between shell 41 ' and body 42 ', and cold air is then from heat exchanger 4 ' originally
Body 41 ' is internal to be passed through.After over-heat-exchanger 4 ', air is heated to 400 DEG C about, then is entered by comburent air duct 2 '
Burner is combustion-supporting.
It is mounted with an expansion joint 7 ' stretching for comburent air duct 2 ' on the outside cold-air duct 6 ' of heating mantles 1 '
Contracting change.As shown in Figure 2, heat exchanger 4 ' and comburent air duct 2 ' epimere are substantially free, can stretch upwards after being heated
Long.For certain type stainless-steel roll bell type annealing furnace, its comburent air duct 2 ' length, between 4000～4700mm, adopts
Heat resisting pipe manufactures.When heating mantles 1 ' internal temperature reaches maximum operating temperature, comburent air duct 2 ' elongation itself is permissible
Reach 50mm, and the length of this 50mm just compensated by expansion joint 7 '.
Although, internal heat exchanger and comburent air duct structure, make heating mantles 1 ' profile succinct, heating mantles 1 ' outer
Shape size is less and heat exchange efficiency is high, using extensive in current combustion type coil of strip bell type annealing furnace heating mantles.
But, because comburent air duct 2 ' is embedded in the insulation material of heating mantles 1 ', after comburent air duct 2 ' lost efficacy
It is difficult to find failpoint；Meanwhile, comburent air duct 2 ' or weld seam added it is necessary to enter when losing efficacy or deformation needs repairing
The internal fibre module removed around comburent air duct 2 ' and heat exchanger 4 ' of heat cover 1 ' could change comburent air duct 2 '
With heat exchanger 4 ', therefore maintenance engineering amount is big, engineering time length and working environment is poor, and maintenance cost is very high；However, being based on
Existing heat exchanger 4 ' and the mounting structure of comburent air duct 2 ', with run time persistently, heat exchanger 4 ' and being located at
The internal comburent air duct 2 ' of heating mantles 1 ' is very easy aging, and does not expand because comburent air duct 2 ' expands with heat and contract with cold
Section 7 ' compensation, and heat exchanger 4 ' is connected with cold-air duct 6 ', when the upper expansion joint 7 ' of heating mantles 1 ' cool exterior air pipeline 6 '
Elongation when not can overcome the disadvantages that comburent air duct 2 ' elongation, be easily caused comburent air duct 2 ' elongation be obstructed and bend or
Torsional deformation, leads to ultimate failure, in addition, heat exchanger 4 ' and comburent air duct 2 ' bending and distortion be also easily caused combustion-supporting
Air line 2 ' weld cracking lost efficacy, and after inefficacy, comburent air duct 2 ' leaks out and leads to burner ignition difficulties, ultimately results in heating
Time lengthening causes capacity loss, causes energy consumption per ton steel exceeded.
Content of the invention
The technical problem to be solved in the present invention is the present situation for prior art, and first technical problem of solution is to carry
Can freely extend at high temperature for one kind and lack without being acted on the deformation such as generation pipe bending, distortion by bending stress
Sunken comburent air duct.
Second technical problem that the present invention solves simultaneously is to provide a kind of rustless steel being provided with this comburent air duct
Bell type annealing furnace, this stainless steel cover type annealing furnace can solve the problem that the comburent air duct two ends that easily make that prior art exists are welded
The problem of seam cracking, extends the service life of comburent air duct and heat exchanger effectively meanwhile, significantly reduces and adds
Hot cover maintenance engineering amount and maintenance cost, improve the bell-type annealing efficiency of furnace, save the energy.
The present invention solves the technical scheme that adopted of above-mentioned first technical problem：A kind of comburent air duct, it is special
Levy and be：Including top comburent air duct, bottom comburent air duct, the combustion-supporting sky of top comburent air duct sleeve pipe and bottom
Feed channel sleeve pipe, one end of this bottom comburent air duct sleeve pipe is tightly connected with bottom comburent air duct one end, this bottom
The other end of comburent air duct sleeve pipe and the mutual fit in top comburent air duct one end, this top comburent air duct sleeve pipe
One end be tightly connected with top comburent air duct one end, the other end of this top comburent air duct sleeve pipe is combustion-supporting with bottom
The outer wall of air line sleeve pipe is tightly connected, and the length of top comburent air duct sleeve pipe and bottom comburent air duct sleeve pipe
Setting does not affect freely stretching of top comburent air duct one end of being led to by combustion air and bottom comburent air duct one end
Long.
As improvement, described be tightly connected for welding.
Improve again, the coincidence length between described top comburent air duct sleeve pipe and bottom comburent air duct sleeve pipe is
2～3 times of the elongation of top comburent air duct one end and bottom comburent air duct one end.
Improve again, the gap between described top comburent air duct sleeve pipe and bottom comburent air duct sleeve pipe is 1.5
～3.5mm.
Improve again, the gap between described top comburent air duct sleeve pipe and bottom comburent air duct sleeve pipe is 2mm.
The present invention solves the technical scheme that adopted of above-mentioned second technical problem：One kind is provided with above-mentioned combustion air
The stainless steel cover type annealing furnace of pipeline it is characterised in that：Also include heating mantles and heat exchanger, this heat exchanger and combustion air
Pipeline is placed in inside heating mantles, and the other end of bottom comburent air duct is welded with burner, and this heat exchanger includes being placed in heating
Shell within cover and the body being placed in this inside the shell, the other end of top comburent air duct is connected with heat exchanger, and heat is handed over
The top of parallel operation is connected with cold-air duct.
As improvement, described cold-air duct is provided with expansion joint.
Improve again, the length of described comburent air duct is in 4000～4700mm.
Improve again, between the other end of the fire-retardant air line of described burner and bottom, be provided with burner protective case.
Compared with prior art, it is an advantage of the current invention that：The present invention, by traditional single comburent air duct, is designed to
Top comburent air duct and bottom comburent air duct structure, meanwhile, in the company of this upper and lower two-part comburent air duct
Connect place's setting top comburent air duct sleeve pipe and bottom comburent air duct sleeve pipe, when the combustion air of high temperature passes through combustion-supporting sky
Feed channel, meets top comburent air duct and bottom comburent air duct freely extending in junction, at high temperature
Under effect, comburent air duct will not be subject to bending stress effect to produce the deformation defects such as pipe bending, distortion, solves existing
The problem easily making comburent air duct two ends weld cracking that technology exists, meanwhile, extends comburent air duct effectively
With the service life of heat exchanger, significantly reduce heating mantles maintenance engineering amount and maintenance cost, improve bell type annealing furnace
Efficiency, saves the energy.
Brief description
Fig. 1 is heating mantles combustion system figure in prior art；
Fig. 2 is the mounting structure schematic diagram of heat exchanger and comburent air duct in prior art；
Fig. 3 is the structural representation of heat exchanger and comburent air duct in Fig. 2；
Fig. 4 is the top view of Fig. 3；
Fig. 5 is the mounting structure schematic diagram of heat exchanger and comburent air duct in the present invention；
Fig. 6 is the structural representation of heat exchanger and comburent air duct in Fig. 5；
Fig. 7 is Fig. 6 middle and upper part comburent air duct sleeve pipe and the structural representation of bottom comburent air duct sleeve pipe；
Fig. 8 is the top view of Fig. 6.
Specific embodiment
Below in conjunction with accompanying drawing embodiment, the present invention is described in further detail.
As shown in Fig. 1 is to 8, comburent air duct 2 in the embodiment of the present invention, including top comburent air duct 21, under
Portion's comburent air duct 22, top comburent air duct sleeve pipe 23 and bottom comburent air duct sleeve pipe 24, the combustion-supporting sky in this bottom
One end of feed channel sleeve pipe 24 is welded to connect with bottom comburent air duct 22 one end, this bottom comburent air duct sleeve pipe 24
The other end and the mutual fit in top comburent air duct 21 one end, in the present embodiment, one end of top comburent air duct 21
In the pipe of the other end of insertion bottom comburent air duct sleeve pipe 24, one end of this top comburent air duct sleeve pipe 23 and top
Comburent air duct 21 one end is welded to connect, the other end of this top comburent air duct sleeve pipe 23 and bottom comburent air duct
The outer wall of sleeve pipe 24 is welded to connect, and the length of top comburent air duct sleeve pipe 23 and bottom comburent air duct sleeve pipe 24 sets
Put top comburent air duct 21 one end not affecting to be led to by combustion air and the freedom of bottom comburent air duct 22 one end
Elongation.
Wherein, the coincidence length between top comburent air duct sleeve pipe 23 and bottom comburent air duct sleeve pipe 24 is upper
2～3 times of the elongation of portion's comburent air duct 21 one end and bottom comburent air duct 22 one end.
In addition, the gap between top comburent air duct sleeve pipe 23 and bottom comburent air duct sleeve pipe 24 is 2mm, make
Obtain and there is enough gaps it is ensured that top helps between sleeve pipe top comburent air duct sleeve pipe 23 and bottom comburent air duct 24
Combustion air line 21, bottom comburent air duct 22 can be freely-movable, it is to avoid generation additional friction force and bend, distort
Deformation.
Using above-mentioned comburent air duct structure so that bottom comburent air duct 22 be heated can be freely swollen upwards
Swollen, upper part comburent air duct 21 is heated and descends free wxpansion backward, changes the direction that comburent air duct 2 is subject to thermal stretching.
Certainly, top comburent air duct sleeve pipe 23 and bottom comburent air duct sleeve pipe 24 can not disturb within combustion-aid air pipe 2
Stream of hot air dynamic characteristic, should avoid hot-air to leak.Simultaneously, it is necessary to assure comburent air duct 2 all can not under cold-hot condition
There is air external leakage, air pressure check air circulation situation, nor the insulation material peace changing existing design can be adopted
Dress mode, installation convenient to carry out.
The stainless steel cover type annealing furnace being provided with above-mentioned comburent air duct 2 in the embodiment of the present invention, also includes heating
Cover 1 and heat exchanger 4, this heat exchanger 4 and comburent air duct 2 are placed in inside heating mantles 1, bottom comburent air duct 22
The other end is welded with burner, and this heat exchanger 4 includes being placed in the shell 42 within heating mantles 1 and the body being placed in this shell 42
41, the other end of top comburent air duct 21 is connected with heat exchanger 4, and the top of heat exchanger 4 is connected with cold-air duct
6, cold-air duct 6 is provided with expansion joint 7, specifically, the length of comburent air duct 2 is in 4000～4700mm.
Additionally, being provided with burner protective case 8 between the other end of the fire-retardant air line of burner and bottom 22.
The present invention, by traditional single comburent air duct, is designed to top comburent air duct 21 and bottom combustion air
Pipeline 22 structure, meanwhile, in the junction setting top comburent air duct sleeve pipe of this upper and lower two-part comburent air duct
23 and bottom comburent air duct sleeve pipe 24, when the combustion air of high temperature passes through comburent air duct 2, comburent air duct 2 exists
Can freely extend completely after being heated inside heating mantles 1, eliminate in addition to by cold-air duct 6 and heat exchanger 4 Gravitative Loads
Flecition power, protects weld seam, completely eliminates the not foot point of original technology.Thus improve heat exchanger 4 and combustion-supporting sky
In feed channel 2 life-span, meanwhile, the active force that burner protective case 8 bears substantially reduces and (is solely subjected to bottom comburent air duct 22 weight
Amount), reduce burner protective case 8 deformation risk, thus being effectively protected burner, at high temperature in the presence of, combustion air
Pipeline 2 will not be subject to bending stress effect to produce the deformation defects such as pipe bending, distortion, solves the easy of prior art presence
Make the problem of comburent air duct two ends weld cracking, meanwhile, effectively extend comburent air duct 2 and heat exchanger 4
Service life, significantly reduces heating mantles 1 maintenance engineering amount and maintenance cost, improves the bell-type annealing efficiency of furnace, save
The energy.
Claims (8)
1. a kind of comburent air duct it is characterised in that：Including top comburent air duct, bottom comburent air duct, top
Comburent air duct sleeve pipe and bottom comburent air duct sleeve pipe, one end of this bottom comburent air duct sleeve pipe is combustion-supporting with bottom
Air line one end is tightly connected, and the other end of this bottom comburent air duct sleeve pipe is mutual with top comburent air duct one end
Fit, one end of this top comburent air duct sleeve pipe is tightly connected with top comburent air duct one end, the combustion-supporting sky in this top
The other end of feed channel sleeve pipe is tightly connected with the outer wall of bottom comburent air duct sleeve pipe, and top comburent air duct sleeve pipe
With the setting of the length of bottom comburent air duct sleeve pipe do not affect top comburent air duct one end of being led to by combustion air and
Freely the extending of bottom comburent air duct one end.
2. comburent air duct according to claim 1 it is characterised in that：Described top comburent air duct sleeve pipe and under
Coincidence length between portion's comburent air duct sleeve pipe is top comburent air duct one end and bottom comburent air duct one end
2～3 times of elongation.
3. comburent air duct according to claim 2 it is characterised in that：Described top comburent air duct sleeve pipe and under
Gap between portion's comburent air duct sleeve pipe is 1.5～3.5mm.
4. comburent air duct according to claim 3 it is characterised in that：Described top comburent air duct sleeve pipe and under
Gap between portion's comburent air duct sleeve pipe is 2mm.
5. a kind of stainless steel cover type annealing furnace being provided with the comburent air duct described in any one of Claims 1-4, its feature
It is：Also include heating mantles and heat exchanger, this heat exchanger and comburent air duct are placed in inside heating mantles, the combustion-supporting sky in bottom
The other end of feed channel is welded with burner, and this heat exchanger includes the shell being placed within heating mantles and the basis being placed in this inside the shell
Body, the other end of top comburent air duct is connected with heat exchanger, and the top of heat exchanger is connected with cold-air duct.
6. stainless steel cover type annealing furnace according to claim 5 it is characterised in that：It is provided with swollen on described cold-air duct
Swollen section.
7. stainless steel cover type annealing furnace according to claim 6 it is characterised in that：The length of described comburent air duct exists
4000～4700mm.
8. stainless steel cover type annealing furnace according to claim 5 it is characterised in that：Described burner and the fire-retardant air hose in bottom
It is provided with burner protective case between the other end in road.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510074937.8A CN104726685B (en) | 2015-02-12 | 2015-02-12 | A kind of comburent air duct and the stainless steel cover type annealing furnace being provided with this comburent air duct |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510074937.8A CN104726685B (en) | 2015-02-12 | 2015-02-12 | A kind of comburent air duct and the stainless steel cover type annealing furnace being provided with this comburent air duct |
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|---|---|
| CN104726685A CN104726685A (en) | 2015-06-24 |
| CN104726685B true CN104726685B (en) | 2017-03-08 |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN104726685A (en) | 2015-06-24 |
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| C06 | Publication | ||
| PB01 | Publication | ||
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