CN108913859A - The application of DX atmosphere heat treatment furnace and high temperature alloy steel, high-carbon steel heat treatment - Google Patents
The application of DX atmosphere heat treatment furnace and high temperature alloy steel, high-carbon steel heat treatment Download PDFInfo
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- CN108913859A CN108913859A CN201810716821.3A CN201810716821A CN108913859A CN 108913859 A CN108913859 A CN 108913859A CN 201810716821 A CN201810716821 A CN 201810716821A CN 108913859 A CN108913859 A CN 108913859A
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 48
- 229910000851 Alloy steel Inorganic materials 0.000 title claims abstract description 12
- 229910000677 High-carbon steel Inorganic materials 0.000 title abstract description 7
- 239000007789 gas Substances 0.000 claims abstract description 115
- 238000001816 cooling Methods 0.000 claims abstract description 71
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000000446 fuel Substances 0.000 claims abstract description 24
- 239000002737 fuel gas Substances 0.000 claims abstract description 18
- 239000003345 natural gas Substances 0.000 claims abstract description 17
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 16
- 230000006641 stabilisation Effects 0.000 claims abstract description 15
- 238000011105 stabilization Methods 0.000 claims abstract description 15
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 8
- 238000010926 purge Methods 0.000 claims abstract description 6
- 238000002156 mixing Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 12
- 238000000137 annealing Methods 0.000 claims description 11
- 230000008569 process Effects 0.000 claims description 11
- 230000008520 organization Effects 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 238000001953 recrystallisation Methods 0.000 claims description 5
- 229910000881 Cu alloy Inorganic materials 0.000 claims description 4
- 238000005245 sintering Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000000112 cooling gas Substances 0.000 claims description 3
- 230000005855 radiation Effects 0.000 claims description 3
- 238000005476 soldering Methods 0.000 claims description 3
- 239000006104 solid solution Substances 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims 1
- 238000002485 combustion reaction Methods 0.000 abstract description 16
- 238000006243 chemical reaction Methods 0.000 abstract description 6
- 230000002269 spontaneous effect Effects 0.000 abstract description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000004880 explosion Methods 0.000 description 3
- 238000003032 molecular docking Methods 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 229960004424 carbon dioxide Drugs 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- -1 and therefore Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 229910002090 carbon oxide Inorganic materials 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000012946 outsourcing Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/02—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working in inert or controlled atmosphere or vacuum
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/08—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of copper or alloys based thereon
-
- 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]
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Combustion Of Fluid Fuel (AREA)
Abstract
The present invention relates to DX atmosphere heat treatment furnace and high temperature alloy steel, the application of high-carbon steel heat treatment, the treatment furnace includes furnace body, DX atmosphere generator, the DX atmosphere generator includes fuel element, nitrogen purge unit, natural gas and air pre-mixing unit, and antibomb unit, fuel element includes radiant tube, igniter burner component, and the cooling device of heat exchange cooling is carried out to DX gas in radiant tube, igniter burner component includes burner, fuel gas pipeline, radiant tube be located at furnace body preheating zone or heating zone and along generate DX gas flow direction be divided into burning zone, rectification section, and current stabilization deferent segment, the internal diameter spontaneous combustion section of rectification section gradually becomes smaller to current stabilization deferent segment.The temperature that the present invention exports DX gas is relatively stable, while gas and reaction heat in furnace to heating after heat exchange, to realize that thermal energy recycles；So that the flow of DX gas output is relatively stable, while the generation of DX gas is highly-safe.
Description
Technical field
The invention belongs to Field of Heat-treatment, and in particular to a kind of DX atmosphere heat treatment furnace also relates to a kind of DX atmosphere
Application of the heat-treatment furnace in high temperature alloy steel, high-carbon steel heat treatment.
Background technique
DX gas is mixed at normal temperature with air, and carry out insufficient combustion using natural gases such as methane or propane as raw material
It burns, so that resolving into the mixed gas containing nitrogen, hydrogen, carbon monoxide and carbon dioxide.Therefore, which can use extensively
In relevant treatment process such as the anaerobic annealing of metal material, protection against oxidation.
For example, China Patent Publication No. is CN204097527U, it discloses a kind of DX gas generating unit, the device packets
It includes：Burner, cooling device, condensate filter, exhaust chimney and cooling driers, wherein burner includes combustion chamber, igniting
Mouthful and with the air inlet of combustion chamber and gas outlet, which connect by connecting pipe with cooling device, cools down and fill
Set and be connected to condensate filter, exhaust outlet is set on condensate filter, the exhaust outlet by valve be separately connected exhaust chimney with
Cooling driers.
When the DX gas generating unit works, the mixed gas of natural gas and air enters burner from air inlet
In combustion chamber, mixed gas is lighted by lighting-up tuyere, incomplete reaction occurs in the combustion chamber for natural gas and air, generates high temperature
DX gas；Then, the DX gas of high temperature is entered in cooling device by connecting pipe, DX gas of the cooling device to high temperature
Cool down；It is entered in condensate filter through overcooled DX gas, filters out the intracorporal moisture of DX gas and impurity；Then,
Clean DX gas enters cooling driers via the exhaust outlet on condensate filter, and exhaust gas is discharged by chimney；Cooling driers are into one
Step is dry to DX gas cooling, and then it is stand-by can be passed into use or storage in metal handling equipment for DX gas.
However above-mentioned DX gas generating unit has following technological deficiency：
1）, before igniting, oxygen is not purged to burner piping, be not only unable to ensure the safety fortune of the gas generating unit
Row, and will affect the incomplete reaction that natural gas and air occur in the combustion chamber, cause energy consumption larger；
2）, the gas generating unit do not include premixing cell for premixing natural gas and air proportion, and premix
Effect it is directly directly related with mixed gas burning, also affect subsequent high temperature DX gas generate；
3）, the device generate rear gas flow rate and gas temperature, very it is unstable, can not cause gas stablize feed
In heat-treatment furnace, therefore, the quality of heat treatment will affect to a certain extent.
Summary of the invention
The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide at a kind of improved DX atmosphere heat
Manage furnace.
Meanwhile the present invention also provides a kind of DX atmosphere heat treatment furnaces in high-alloy steel, high-carbon steel, bearing steel and copper alloy
Application in heat treatment process, wherein heat treatment process includes spheroidizing, recrystallization annealing, bright annealing, bright solid solution, pricker
Weldering and sintering.
In order to solve the above technical problems, the present invention adopts the following technical scheme that：
A kind of DX atmosphere heat treatment furnace comprising furnace body is located at the intracorporal DX atmosphere generator of furnace, the DX atmosphere generator
Including fuel element, condensing unit and cooling driers, wherein fuel element includes radiant tube, the point that radiant tube air inlet end is arranged in
Nozzle assembly is burnt, which includes the burner protruded into from radiant tube air inlet end, the fuel gas conduit being connected with burner
Road, radiant tube is located at preheating zone or the heating zone of furnace body, and is divided into burning zone, rectification along the flow direction for generating DX gas
Section and current stabilization deferent segment, wherein the internal diameter spontaneous combustion section of rectification section gradually becomes smaller to current stabilization deferent segment；Fuel element further includes
The cooling device that radiant tube outside or inside is used to carry out DX gas in radiant tube heat exchange cooling is set, wherein cooling device
Gas for heat exchange is arranged into furnace body；
DX atmosphere generator further include the nitrogen purge unit that is arranged on a road of fuel gas pipeline, with fuel gas pipeline into
Port docking natural gas and air pre-mixing unit and be connected to and is capable of with fuel gas pipeline the pipe air pressure quick pressure releasing prevent
Quick-fried unit.
A specific implementation according to the present invention and preferred aspect, cooling device are in external-cooling type, and including being set in radiation
Pipe periphery and the air inlet pipe and an air outlet pipe for being formed with the cooling tube of supplied gas circulation cavity, being connected with cavity, wherein from outside furnace
Gas into cavity exchanges heat with radiant tube, and arranges from escape pipe into furnace.
Preferably, air inlet pipe and an air outlet pipe is located at the both ends of cooling tube, and heat exchange air-flow stream within the cavity
To be located at radiant tube in gas flow it is consistent.
Preferably, it is additionally provided with the guiding subassembly convenient for recuperated gas flowing in the cavity, which includes that spiral twines
Be wound on radiant tube periphery and be located in the flow deflector of cooling inside pipe wall, wherein flow deflector and cooling inside pipe wall, radiation pipe outer wall it
Between formed spiral shape diversion cavity.
Alternatively, cooling device be in inner-cooled, and including be located at radiant tube inside cooling tube, for cooling tube to be located in
Locating piece inside radiant tube and the organization of supply to cooling tube infeed cooling gas.
Preferably, cooling tube includes the first tube body extended along radiant tube length direction；Part be built in the first tube body,
Remainder exposes the second tube body outside the first tube body, wherein the second tube body is connected from inner end with the first tube cavity, supplies
Answer mechanism include the air inlet pipe being connected with the second tube body exposed parts, the escape pipe being connected with the first tube body and with into
The gas supply assembly that tracheae is connected.
Specifically, the first tube body is arranged in parallel with the second tube body, and the second tube body is located at the middle part of the first tube body, while two
The centerline collineation of person's length direction.
Preferably, cooling tube is located in burning zone and the end of the second tube body leakage is arranged close to rectification section, and escape pipe
It is arranged positioned at the first tube body close to the end where air inlet pipe.
Further, it is equipped with diversion pipe far from the end where air inlet pipe in the first tube body, the diversion pipe spontaneous combustion section
Outlet end is to air inlet end in the gradually smaller frustum of outer diameter or cone.
Preferably, locating piece is the flow deflector for being spirally wound on first tube body periphery, and wherein flow deflector is in burning zone
Interior formation spiral shape water conservancy diversion cavity.
In addition, condensing unit includes tubular heat exchanger, the overflow tank that is connected with tubular heat exchanger, wherein arranging
Fuel element is connected by tubing heat exchanger with cooling driers, and in the gas access DX of tubing heat exchanger and fuel element
The convergence unit of DX gas is additionally provided between DX gas vent, which includes the height of inner space from one end to another
The gradually smaller convergence chamber of one end, the connector for being connected to the high one end in convergence chamber inner space go out DX with current stabilization deferent segment
Communicating pipe that gas end is connected, the bellows for connector to be connected with communicating pipe.
In this example, igniter burner has multiple, and therefore, the high one end in convergence chamber inner space is equipped with multiple corresponding connect
Head, then, the gas of each burner combustion discharge pass through bellows respectively and are connected with connector, and wherein bellows can be along certainly
The expansion of body length direction and gathering setting.
In addition, being communicated with the gas-guide tube imported DX gas inside heat-treatment furnace in the gas outlet of cooling driers.
Another technical solution of the invention is：Above-mentioned DX atmosphere heat treatment furnace high-alloy steel, high-carbon steel, bearing steel and
Application in the heat treatment process of copper alloy, wherein heat treatment process includes spheroidizing, recrystallization annealing, bright annealing, light
Bright solid solution, soldering and sintering.
Due to the implementation of above technical scheme, the present invention has the following advantages that compared with prior art：
The temperature that one aspect of the present invention exports DX gas is relatively stable, while gas and generation DX gas generation after heat exchange
A large amount of chemical reaction heats also can be heated and be heated up in furnace, to realize that thermal energy recycles；On the other hand make DX gas defeated
Flow out is relatively stable, while before ignition, it is ensured that no oxygen remains in combustion gas line, and in the pressure of antibomb unit
Under monitoring, the safety that DX gas generates is improved, in addition, being more advantageous under natural gas and air pre-mixing unit and generating DX gas
Body.
Detailed description of the invention
With reference to the accompanying drawing and specific embodiment, the present invention will be further described in detail：
Fig. 1 is the schematic front view of heat-treatment furnace in embodiment 1；
Fig. 2 is the structural schematic diagram of DX atmosphere generator in Fig. 1（External-cooling type）；
Fig. 3 is the structure enlargement diagram of fuel element in Fig. 2；
Fig. 4 is the schematic front view of heat-treatment furnace in embodiment 2；
Fig. 5 is the structural schematic diagram of DX atmosphere generator in embodiment 2（Inner-cooled）；
Fig. 6 is the structure enlargement diagram of fuel element in Fig. 5；
Wherein：1, furnace body；2, DX atmosphere generator；20, fuel element；200, radiant tube；A, burning zone；B, rectification section；c,
Current stabilization deferent segment；201, igniter burner component；E, burner；F, fuel gas pipeline；G, combustion-supporting gas pipeline；G1, air pipe line；g3,
Gas pipeline；202, cooling tube；203, air inlet pipe；204, escape pipe；205, guiding subassembly；D, flow deflector；21, condensation is single
Member；210, tubular heat exchanger；211, overflow tank；22, cooling driers；24, nitrogen purge unit；240, gas pipeline；241,
Flow valve；25, premixing cell；250, premix chamber；251, natural gas line；26, unit is converged；260, chamber is converged；261, ripple
Pipe；262, connector；263, communicating pipe；27, antibomb unit；270, explosion stack；271, explosion-proof valve；28, gas-guide tube；202 ', cooling
Device；D ', cooling tube；D1, the first tube body；D2, the second tube body；D3, diversion pipe；E ', locating piece；F ', organization of supply；F1, into
Tracheae；F2, escape pipe.
Specific embodiment
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing with specific reality
Mode is applied to be described in detail the present invention.Many details are explained in the following description in order to fully understand this hair
It is bright.But the invention can be embodied in many other ways as described herein, those skilled in the art can be not
Similar improvement is done in the case where violating intension of the present invention, therefore the present invention is not limited by the specific embodiments disclosed below.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be orientation based on the figure or
Positional relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning must
There must be specific orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the present invention, the meaning of " plurality " is at least two, such as two, three
It is a etc., unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary
The interaction relationship of the connection in portion or two elements, unless otherwise restricted clearly.For those of ordinary skill in the art
For, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
In invention unless specifically defined or limited otherwise, fisrt feature can be in the second feature " on " or " down "
First and second features directly contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature is
Two features " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of the
One characteristic level height is higher than second feature.Fisrt feature can be first under the second feature " below ", " below " and " below "
Feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.
It should be noted that it can be directly another when element is referred to as " being fixed on " or " being set to " another element
On one element or there may also be elements placed in the middle.When an element is considered as " connection " another element, it can be with
It is directly to another element or may be simultaneously present centering elements.Term as used herein " vertically ", " level
", "upper", "lower", "left", "right" and similar statement for illustrative purposes only, be not offered as being uniquely to implement
Mode.
Embodiment 1
As shown in Figure 1 to Figure 3, DX atmosphere heat treatment furnace involved in the present embodiment is mainly used for high temperature alloy steel and height
Carbon steel heat treatment, such as bearing steel annealing, spheroidizing, recrystallization annealing handle in application.
Specifically, the DX atmosphere hair that heat-treatment furnace includes furnace body 1, is arranged in furnace body 1 and is capable of forming DX protective atmosphere
Generating apparatus 2, wherein DX atmosphere generator 2 includes fuel element 20, condensing unit 21, cooling driers 22.
In this example, fuel element 20 includes the radiant tube 200 being located in furnace body 1,200 air inlet end of radiant tube is arranged in
Igniter burner component 201 is arranged in outside radiant tube 200 for carrying out the cooling device of heat exchange cooling to DX gas in radiant tube
（Namely external-cooling type）, wherein cooling device is arranged for the gas of heat exchange into furnace body 1.
Specifically, cooling device includes the cooling tube for being set in 200 periphery of radiant tube and being formed with supplied gas circulation cavity
202, the air inlet pipe 203 and escape pipe 204 being connected with cavity, wherein radiant tube 200 is located in the preheating zone of furnace body 1, wherein
Gas from outside furnace into cavity exchanges heat with radiant tube 200, and from 204 row of escape pipe into furnace.
In order to realize the steady flow of DX gas after production, in this example, in radiant tube 200 along the flowing for generating DX gas
Direction is divided into burning zone a, rectification section b and current stabilization deferent segment c, and wherein the internal diameter spontaneous combustion section a of rectification section b is defeated to current stabilization
Section c gradually becomes smaller out.
Specifically, the internal diameter of burning zone a is between 1.5 ~ 2 times of current stabilization deferent segment c internal diameter.It is too large or too small all unfavorable
In the flowing of DX gas（In this example, the internal diameter of burning zone a is 1.77 times of current stabilization deferent segment c internal diameter）.
Air inlet pipe 203 and escape pipe 204 are located at the both ends of cooling tube 202, heat exchange air-flow stream within the cavity
To be located at radiant tube in gas flow it is opposite.It can be good at carrying out cooling control to the DX gas of burning production in this way, make
The temperature that it is exported is relatively stable, while gas also can be heated and be heated up in furnace after heat exchange, to realize that thermal energy recycles.
Meanwhile in order to improve heat exchange efficiency and effect, be additionally provided with the diversion group convenient for recuperated gas flowing in the cavity
Part 205.
The guiding subassembly 205 includes the flow deflector for being spirally wound on 200 periphery of radiant tube and being located in 202 inner wall of cooling tube
D wherein forms spiral shape diversion cavity between 202 inner wall of flow deflector d and cooling tube, 200 outer wall of radiant tube.Therefore, recuperated gas
Flowing it is more stable, and more effectively make the contact of air-flow with 200 periphery flow deflector d and radiant tube, improve heat exchange effect
Fruit.
Igniter burner component 201 includes the burner e and burn that spontaneous combustion section a is protruded into far from the end rectification section b in burning zone a
The fuel gas pipeline f and combustion-supporting gas pipeline g that mouth e is connected.
Combustion-supporting gas pipeline g includes the structure feature of air pipe line g1 and gas pipeline g3 and conventional ignition burner,
It is not described in detail herein.
In this example, DX atmosphere generator 2 further includes being connected to fuel gas pipeline f and capable of carrying out oxygen to fuel gas pipeline f
It the gas purge unit 24 of removing and is connected to and can be mixed with air by natural gas in proportion with air pipe f is burnt
Premixing cell 25.
Nitrogen purge unit 24 includes protruding into the gas pipeline 240 being connected in furnace body 1 with fuel gas pipeline f, being arranged in gas
Flow valve 241 and gas provisioning component on body pipeline 240, the gas that wherein gas provisioning component is supplied are nitrogen.
Premixing cell 25 is located at the outside of furnace body 1, and it is natural to be connected including premix chamber 250, respectively with premix chamber 250
Feed channel 251 and air pipeline, and the flow control valve being separately positioned on natural gas line 251 and air pipeline, wherein
Enter the ratio of natural gas and air in premix chamber 250 by flow control valve control, and forms mixed gas combustion in premix chamber 250
Material.Mixed gaseous fuel is oriented to igniter burner 201 by fuel gas pipeline f simultaneously.
The overflow tank 211 that condensing unit 21 includes tubular heat exchanger 210, is connected with tubular heat exchanger 210,
The air inlet of the tubular heat exchanger 210（DX gas）With the gas outlet of fuel element 20（DX gas）Docking, the shell and tube
The gas outlet of heat exchanger 210（DX gas）With the air inlet of cooling driers 22（DX gas）Docking.As for tubular heat exchanger
For direct outsourcing, belongs to this field conventional products, it is not described in detail herein.
Meanwhile in the air inlet of tubing heat exchanger 210（DX gas）With the gas outlet of fuel element 20（DX gas）It
Between be additionally provided with the convergence unit 26 of DX gas.
Specifically, convergence unit 26 includes the height of inner space from one end to the gradually smaller convergence chamber in the other end
260, wherein convergence chamber 260 is connected by bellows 261 with fuel element 20 from the high one end in inner space, converge chamber
260 are connected from the other end with the air inlet of tubing heat exchanger.
In this example, the high one end in convergence 260 inner space of chamber is equipped with multiple corresponding connectors 262, then, each burning
The gas of mouth burning discharge corresponds to connector 262 with bellows 261 by communicating pipe 263 and is connected, and wherein bellows 261 can
It is unfolded and collapses setting along length direction.
Meanwhile antibomb unit 27 is additionally provided on fuel gas pipeline f, which includes being connected with fuel gas pipeline f
Explosion stack 270 and the explosion-proof valve 270 that is arranged on explosion stack 270, wherein by the intelligent control of explosion-proof valve 270, it is ensured that mixed
Close safety when gas fuel combustion.
Then, as shown in Figure 1, fuel element 20 has four groups, therefore, with there are four connectors 262, while 263 He of communicating pipe
The corresponding DX gas vent by every group of fuel element 20 of bellows 261 is connected with convergence unit 26, then, enters back into pipe
Formula heat exchanger 210 carries out condensation process.
In addition, being communicated with the gas-guide tube 28 imported DX gas inside furnace body 1 in the gas outlet of cooling driers 22.
Finally, carrying out in mixed process in the application in natural gas and air, the volume ratio of natural gas and air is 1：6
~8.
In conclusion the specific following advantage of the present embodiment：
1, temperature control is carried out to DX gas is generated by recuperated gas, so that the temperature of DX gas output is relatively stable, changed simultaneously
Gas also can be heated and be heated up in furnace after heat, to realize that thermal energy recycles；
2, by the design of radiant tube segmented, so that the flow of DX gas output is relatively stable, so that one in DX atmosphere
The distribution of carbonoxide is relatively uniform, it is ensured that heat treatment quality；
3, by the location layout of radiant tube, DX protective gas not only can be generated, but also a large amount of chemical reaction heats of generation can be used
In the heating of workpiece, the energy, energy saving are made full use of；
4, it is purged by nitrogen, remaining oxygen possible in fuel gas pipeline is thoroughly removed, the safety that DX gas generates is improved;
5, natural gas and volume of air ratio are 1：7 carry out being mixed to form gaseous fuel, and therefore, natural gas is incomplete in the combustion chamber
The effect of reaction is good, is more advantageous to and generates DX gas;
6, DX protective atmosphere can be widely applied in the heat treatment process of high-alloy steel, high-carbon steel, bearing steel and copper alloy, and
And energy conservation is up to 30% or more, involved in heat treatment process include spheroidizing, it is recrystallization annealing, bright annealing, bright solid
Molten, soldering and sintering etc..
Embodiment 2
As shown in Figures 4 to 6, the heat-treatment furnace of the present embodiment is substantially the same manner as Example 1, the difference is that cooling device
202′（Inner-cooled）.
In this example, cooling device 202 ' includes cooling tube d ' inside the radiant tube 200, is used for cooling tube d ' positioning
Locating piece e ' inside the radiant tube 200 and organization of supply f ' to cooling tube d ' infeed cooling gas.
Cooling tube d ' includes the first tube body d1 extended along 200 length direction of radiant tube；Part is built in the first tube body
D1, remainder expose the second tube body d2 outside the first tube body d1, wherein the second tube body d2 is from inner end and the first tube body d1
Chamber is connected, and organization of supply f includes the air inlet pipe f1 being connected with the second tube body d2 exposed parts, is connected with the first tube body d1
Escape pipe f2 and the gas supply assembly that is connected with air inlet pipe f1（It is not shown in figure）.
Cooling tube d ' is located in burning zone a and the end of the second tube body d2 leakage is arranged close to rectification section, and escape pipe f2
It is arranged positioned at the first tube body d1 close to the end where air inlet pipe f1.The air-flow entered outside furnace in this way is along the second tube length side
To from inner end enter the second tube body, further along the second tube body flow back and arrange from escape pipe into furnace, and then can in furnace into
Row heating and heating, to realize the recycling of thermal energy.
Specifically, the first tube body d1 is arranged in parallel with the second tube body d2, and the second tube body d2 is located in the first tube body d1
Portion, while the centerline collineation of the two length direction.
Meanwhile diversion pipe d3, diversion pipe d3 spontaneous combustion are equipped with far from the end where air inlet pipe f1 in the first tube body d1
The outlet end of section a is to air inlet end in the gradually smaller cone of outer diameter.The DX gas that burning is generated is uniform
It disperses around, and then is convenient for thermal energy exchange.
Locating piece e ' is the flow deflector for being spirally wound on the first periphery tube body d1, and wherein flow deflector is formed in burning zone a
Spiral shape water conservancy diversion cavity.The water conservancy diversion cavity makes the flowing of DX gas more stable.
Meanwhile in this example, the internal diameter of burning zone a is between 2 ~ 4 times of current stabilization deferent segment c internal diameter.It is too large or too small all
It is unfavorable for the flowing of DX gas, specifically, the internal diameter of burning zone a is 2.8 times of current stabilization deferent segment c internal diameter.
The present invention is described in detail above, its object is to allow the personage for being familiar with this field technology that can understand this
The content of invention is simultaneously implemented, and it is not intended to limit the scope of the present invention, all Spirit Essence institutes according to the present invention
The equivalent change or modification of work, should be covered by the scope of protection of the present invention.
Claims (10)
1. a kind of DX atmosphere heat treatment furnace comprising furnace body is located at the intracorporal DX atmosphere generator of furnace, the DX atmosphere hair
Generating apparatus includes fuel element, condensing unit and cooling driers, wherein the fuel element includes radiant tube, the spoke is arranged in
The igniter burner component of pipe air inlet end is penetrated, the igniter burner component includes the burning protruded into from radiant tube air inlet end
Mouth, the fuel gas pipeline being connected with the burner, it is characterised in that：
The radiant tube is located at preheating zone or the heating zone of the furnace body, and is divided into along the flow direction for generating DX gas
Burning zone, rectification section and current stabilization deferent segment, wherein the interior burning zone described without leave of the rectification section is exported to the current stabilization
Section gradually becomes smaller；The fuel element further includes that setting is used in the radiant tube outside or inside to DX in the radiant tube
Gas carries out the cooling device of heat exchange cooling, wherein gas of the cooling device for heat exchange is arranged into the furnace body；
The DX atmosphere generator further include the nitrogen purge unit being arranged on a road of the fuel gas pipeline, with it is described
The natural gas and air pre-mixing unit and be connected to the fuel gas pipeline and be capable of the pipe that the air inlet of fuel gas pipeline docks
The antibomb unit of air pressure quick pressure releasing.
2. DX atmosphere heat treatment furnace according to claim 1, it is characterised in that：The cooling device is in external-cooling type, and
Including the air inlet for being set in the radiant tube periphery and being formed with the cooling tube of supplied gas circulation cavity, being connected with the cavity
Pipe and escape pipe, wherein air inlet pipe be located at furnace outside, wherein from outside furnace into the cavity gas and the radiant tube carry out
Heat exchange, and arrange from the escape pipe into furnace.
3. DX atmosphere heat treatment furnace according to claim 2, it is characterised in that：The air inlet pipe and the escape pipe point
Not Wei Yu the cooling tube both ends, and be located at the intracorporal heat exchange air flow direction of the chamber and the gas in the radiant tube
Flow direction is opposite.
4. DX atmosphere heat treatment furnace according to claim 2 or 3, it is characterised in that：It is additionally provided with and is convenient in the cavity
The guiding subassembly of recuperated gas flowing, the guiding subassembly include being spirally wound on the radiant tube periphery and being located in described
The flow deflector of cooling inside pipe wall, wherein forming spiral between the flow deflector and the cooling inside pipe wall, the radiation pipe outer wall
Shape diversion cavity.
5. DX atmosphere heat treatment furnace according to claim 1, it is characterised in that：The cooling device is in inner-cooled, and is wrapped
Include the cooling tube being located inside the radiant tube, for the cooling tube is located in locating piece inside the radiant tube,
And the organization of supply of cooling gas is fed to the cooling tube.
6. DX atmosphere heat treatment furnace according to claim 5, it is characterised in that：The cooling tube includes along the spoke
Penetrate the first tube body of length of tube direction extension；Part is built in first tube body, remainder exposes outside first tube body
The second tube body, wherein second tube body is connected from inner end with first tube cavity, the organization of supply packet
Include the air inlet pipe being connected with the second tube body exposed parts, the escape pipe being connected with first tube body and with into
The gas supply assembly that tracheae is connected.
7. DX atmosphere heat treatment furnace according to claim 6, it is characterised in that：The cooling tube is located at the burning zone
The end of the interior and described second tube body leakage is arranged close to the rectification section, and the escape pipe is located at first tube body and leans on
End setting where the nearly air inlet pipe.
8. DX atmosphere heat treatment furnace according to claim 6 or 7, it is characterised in that：In first tube body far from institute
End where stating air inlet pipe is equipped with diversion pipe, and the diversion pipe is from the outlet end of the burning zone to air inlet end in outer
The gradually smaller frustum of diameter or cone；The locating piece is the flow deflector for being spirally wound on first tube body periphery,
Described in flow deflector spiral shape water conservancy diversion cavity is formed in the burning zone.
9. DX atmosphere heat treatment furnace according to claim 1, it is characterised in that：The condensing unit includes shell and tube heat
Exchanger, the overflow tank being connected with the tubular heat exchanger, wherein the tubular heat exchanger is single by the burning
It is first to be connected with the cooling driers, and the DX gas in the gas access DX of the tubing heat exchanger and the fuel element
It is additionally provided with the convergence unit of DX gas between outlet, the convergence unit includes the height of inner space from one end to another
The gradually smaller convergence chamber in end, the connector for being connected to the high one end in the convergence chamber inner space are exported with the current stabilization
Section goes out communicating pipe, the bellows for the connector to be connected with the communicating pipe that DX gas end is connected.
10. a kind of DX atmosphere heat treatment furnace as described in any one of claims 1 to 9 claim is in high-alloy steel, high-carbon
Application in the heat treatment process of steel, bearing steel and copper alloy, wherein heat treatment process include spheroidizing, recrystallization annealing,
Bright annealing, bright solid solution, soldering and sintering.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810716821.3A CN108913859B (en) | 2018-07-03 | 2018-07-03 | DX atmosphere heat treatment furnace and application of high isothermal alloy steel and high carbon steel heat treatment |
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|---|---|---|---|
| CN201810716821.3A CN108913859B (en) | 2018-07-03 | 2018-07-03 | DX atmosphere heat treatment furnace and application of high isothermal alloy steel and high carbon steel heat treatment |
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| CN109819538A (en) * | 2019-01-14 | 2019-05-28 | 范宜然 | Heating radiation cooling device |
| CN113088662A (en) * | 2021-04-30 | 2021-07-09 | 江西红睿马钢管股份有限公司 | DX gas carbon potential control method in bearing steel pipe anaerobic spheroidizing annealing process |
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| Publication number | Publication date |
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| CN108913859B (en) | 2023-11-28 |
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