CN100577823C - Heat treatment furnace with built-in euthermic gas generation device - Google Patents
Heat treatment furnace with built-in euthermic gas generation device Download PDFInfo
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- CN100577823C CN100577823C CN200810019851A CN200810019851A CN100577823C CN 100577823 C CN100577823 C CN 100577823C CN 200810019851 A CN200810019851 A CN 200810019851A CN 200810019851 A CN200810019851 A CN 200810019851A CN 100577823 C CN100577823 C CN 100577823C
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Abstract
The invention relates to a built-in heat-discharging type gas generation device heat treating furnace, which comprises devices such as a material feeding platform, a preheating chamber, a heating chamber, a cooling chamber and a material discharging platform. A mixing combustor of the heat-discharging type gas generation device is built in the preheating chamber (or heating up region) of the heat treating furnace, the heat-discharging gas generation device is used to prepare protective gas which is needed by the heat treating furnace in the heat treating process, the combustor of the heat-discharging gas generation device is directly arranged into the preheating chamber of the heat treating furnace, thus not only can directly prepare protective gas in furnace, but also can directly reclaim large amount of chemical reacting heat which is generated in the process of preparing protective gas, wherein the heat energy which is reclaimed can be used to heat up work-pieces in furnace, therefore the heat treating furnace can reasonably use energy, and has extremely considerable energy-saving effect.
Description
Technical field
The present invention relates to a kind of heat treatment furnace with built-in euthermic gas generation device, be mainly used in the protective atmosphere of material parts such as various steels, stainless steel, copper: thermal treatment such as normalizing, annealing, tempering, soldering, sintering, modified, carburizing.
Background technology
Heat release formula protection gas is that a kind of utilization " fuel+air " is directly burnt, restitutive protection's gas of producing of purified processing again.Can be applicable to various metal partss less, non-oxidation thermal treatment, have extremely wide application market.
Producing of tradition heat release formula protection gas is to produce by a special gas generating unit.The principle of work of this generating unit is as follows: at first utilize the metering tolerance to control a certain amount of fuel and air is sent in the mixing burner respectively; the high-temperature gas that chemical reaction generates takes place in the mixing burner burning in two kinds of materials; and then high-temperature gas drawn from mixing burner; use water quench; regulate dew point by refrigeration more at last; make the protection gas that meets the demands, be used for directly being delivered in the non-oxidation heat processing furnace with reductibility.
A large amount of chemical reaction heats that above-mentioned gas generating unit can produce when burning in producing process, this part heat are difficult to recycle.In addition, because therefore the high-temperature gas that generates also needs a large amount of water coolants to cool off when handling this high-temperature gas.This way energy wastage is very big, uneconomical.Though most raw material of traditional heat release formula protection gas is an air, cost is very low, because above-mentioned described to produce the process energy wastage huge, is difficult to promote.
Summary of the invention
The object of the present invention is to provide a kind of heat treatment furnace that can rationally utilize a large amount of heats that heat release formula gas generating unit produces in producing process.
In order to reach above purpose, the scheme that the present invention adopts is: a kind of heat treatment furnace with built-in euthermic gas generation device comprises loading bay, preheating chamber, heating chamber, cooling room, discharge pedestal; Be provided with the mixing burner of heat release formula gas generating unit in the preheating chamber of this heat treatment furnace, this gas generating unit is used for producing this heat treatment furnace at the required restitutive protection's gas of heat treatment process.
Owing to adopted above technical scheme; the present invention has obtained following advantage: the burner in the heat release formula gas generating unit is set directly at (or the section that heats up) in the preheating chamber of heat treatment furnace; so not only can in stove, directly produce required shielding gas; and a large amount of chemical reaction heats that produce in producing protection gas process also can be directly warmed-up indoor workpiece recovery; this part heat that reclaims can be used for heated parts; therefore heat treatment furnace of the present invention can reasonable energy utilization, has very considerable energy-saving effect.
Description of drawings
Accompanying drawing 1 is the layout drawing of continuity heat treatment furnace of the present invention;
Accompanying drawing 2 is the layout drawing of heat release formula gas generating unit of the present invention;
Wherein: 1, loading bay; 2, preheating chamber; 3, heat release formula gas generating unit; 31, inflammable gas admission passage; 32, air admission passage; 33, mixing burner; 34, flowrate control valve; 4, heating chamber; 5, cooling room; 51, insulated cabinet; 52, preceding water cooling chamber; 53, strong convection cold house; 54, water cooling chamber, back; 6, discharge pedestal; 7, postprocessing working procedures; 8, on-line monitoring instrument.
Embodiment
Referring to accompanying drawing 1, this figure is depicted as the orthographic plan example of the continuous roller bottom type annealing furnace in the heat treatment furnace with built-in euthermic gas generation device, form by following each several part: loading bay 1, preheating chamber 2, heating chamber 4, cooling room 5, discharge pedestal 6, heat release formula gas generating unit 3.
The roller-way transmission system comprises roller-way, roller, chain, drive system, frequency conversion speed-adjusting system.Each roller all links to each other with drive system through chain, and bearing is equipped with at the roller two ends, and is supported by main structure.These mechanisms form the automatic production line that connects the annealing furnace entire structure.
Loading bay 1 is generally by material platform skeleton, roller-way, roller-way transmission system, frequency conversion speed-adjusting system; Each roller all links to each other with drive system through chain, and workpiece is sent into vestibule.Bearing is equipped with at the roller two ends, and is supported by main structure.The material platform is divided into two sections and adopt frequency transformer to control automatically, and its drive system should keep synchronously with stove.
Preheating chamber 2 is between loading bay 1 and heating chamber 4, adopt shaped steel and steel plate seal welding structure, insulation construction, lagging material adopts light-weight insulating brick and alumina silica refractory usually, preheating chamber 2 is compact to design, and fire door and heat insulation door curtain are housed drop to the consumption of radiations heat energy and gas minimum.The open height of fire door that is used for charging is adjustable according to the feed height activity.Because the temperature in the preheating chamber 2 is higher, so the roller of She Zhiing and roller-way adopt heat-resisting rust steel to make within it.Sealing bearing is a high-temperature bearing.
Referring to accompanying drawing 2; heat release formula gas generating unit 3 is used to produce the heat release formula gas generating unit (shielding gas is used in heating chamber 2 and the cooling room 5) that uses as restitutive protection's gas in described non-oxidation thermal treatment unit (above-mentioned loading bay 1, preheating chamber 2, heating chamber 4, cooling room 5, discharge pedestal 6, roller-way transmission system, general designation non-oxidation thermal treatment unit).The fuel that this gas generating unit 3 adopts is Sweet natural gas, Sweet natural gas, and the volume ratio of Sweet natural gas and air is 18～9: 1.Both are as follows at the gas ingredients that mixing burner burning back produces:
In addition, control the Chemical Composition that unstripped gas takes place, thereby reach the protective atmosphere composition of required processing requirement by the ratio of control " natural gas-air ".
Enumerate a kind of concrete structure of heat release formula gas generating unit 3 below in conjunction with accompanying drawing 2: it comprises mixing burner 33, be used for the inflammable gas (present embodiment is a Sweet natural gas) of preset ratio is sent into inflammable gas admission passage 31 in the mixing burner 33, is used for the air (combustion-supporting gas) of preset ratio is sent into air admission passage 32 in the mixing burner 33, and inflammable gas admission passage 31, air admission passage 32 are respectively arranged with flowrate control valve 34 in passage separately.
Mixing burner 33 is arranged in the preheating chamber 2; produce a large amount of chemical reaction heats that produce in the protection gas process like this and can directly be reclaimed (this mixing burner 3 preheating chamber 2 in and workpiece generation heat exchange); this part heat that reclaims is used to the workpiece in the process furnace, has embodied this heat treatment furnace and has had very considerable energy-saving effect.
Inflammable gas and air are made primary protection gas after mixing burner 33 burnings, these primary protection aerial roots pass through different postprocessing working procedures 7 again according to needs, finish further processing and make the protection gas that meets subsequent request.Above-mentioned different postprocessing working procedures 7 comprises handles, adds enriching agent to first class purification processing, secondary purification; It is that water-cooled dewaters that first class purification is handled, and can directly be used as the few oxide treatment of black of brass work annealing thermal treatment, steel through the protection gas after this grade processing; Secondary purification is handled, and promptly lyophilization can be directly used in the protective atmosphere thermal treatments such as clean annealing, normalizing and fine weldering of steel and copper alloy successively through the protection gas after one-level, the processing of secondary operation; The carburizing that is mainly used in steel of the art breading of the interpolation enriching agent of last step, thermo-chemical treatment such as modified.Protection gas after what selects for use handle can specifically be selected according to the needs of different non-oxidation process.
Stove housing in the heating chamber 4 is welded with mild steel plate, guarantees resistance to air loss.There is the sealing cover sealing at heating unit, roller two ends, to guarantee maximum resistance to air loss.Heat insulation employing refractory brick of body of heater and aluminum silicate fiber.Furnace lining pure aluminium silicate module adopts special heat-resisting anchoring piece to be fixed on the body of heater, and thermal conduction is dropped to minimum.Furnace wall and furnace bottom adopt firebrick structure.Body of heater adds the thermal recovery radiator tube, is distributed in the furnace roof and the furnace bottom place of heating chamber 4 respectively.And these radiator tubes also will be designed to and can directly extract easy access out from the body of heater side.Heating chamber 4 is determined length and width according to the production capacity size usually, interior all heating units (being radiator tube) are divided into a plurality of independent control areas (this example is four independent control regions) along the furnace superintendent direction, each warm area is all independent by the PID temperature regulator, control automatically, possesses overtemperature safety control function, when temperature surpasses the safety value of setting, can cut off heating power supply automatically.The heating chamber furnace roof is made up of several dismountable plates, is convenient to the maintenance personnel and enters body of heater, and the furnace roof plate is provided with suspension ring, is convenient to sling.Roller in the heating chamber 4 adopts the high temperature steel casting.Transmission system comprises: step-down gear and frequency conversion speed-adjusting system, and transmission roller, transmission chain, sprocket wheel, stretcher and transmission malfunction detection system etc., sealing bearing adopts high-temperature bearing.
Insulated cabinet 51 is positioned at the exit of heating chamber, and the purpose that this insulated cabinet 51 is set mainly is to reach minimum for the temperature that makes the heating chamber back zone is subjected to the influence of cooling room 5, and this cell structure compactness is equipped with heat-resisting insulating curtain usually, effectively prevents the thermal radiation loss of heating chamber.Roller in it adopts the high temperature steel casting.
Preceding water-cooled cup 52 is positioned in the middle of insulated cabinet 51 and the strong convection cold house 53, is airtight double-deck water-cooling structure, and 53 the handicapping gas curtains in strong convection cold house; Preceding water cooling chamber adopts the water jacket cooling, and the material temperature is in the condition of high temperature, and heat exchange is abundant, and room pressure is stable, and the choke curtain can effectively reduce the interference of heating chamber and strong convection cooling room.Roller adopts the high temperature steel casting in it.Sealing bearing adopts high-temperature bearing.
Strong convection cold house 53 is the strong convection circulating cooling system through particular design and processing.Low-temperature protection gas after heat exchange by equally distributed high efficiency nozzle, forms almost 100% high speed convection at workpiece surface, reaches the ideal cooling performance, can make goods finish cooling at short notice, reaches the purpose of bright heat treatment.Roller adopts the stainless steel tube manufacturing.Sealing bearing adopts high-temperature bearing
Back water cooling chamber 54 is the double-layer seal water-cooling structure, and discharge port is established movable choke curtain.This section adopts mild steel plate to make, and favorably situated stiffening web is to obtain rigidity preferably.Roller adopts the seamless tube manufacturing, and sealing bearing adopts high-temperature bearing.
Discharge pedestal 6 is at the discharge end of whole stove, and the design of this material platform is identical with the loading bay of front end 1.The traversing drawing mechanism of automatic lifting is equipped with and.
In addition, at the collecting hood that the outlet and the ingress of whole stove are equipped with gas, be used for collecting in the discharging stove and discharge gas, extraction hood links to each other with furnace binding, by pipeline extraction hood is guided to emission-control equipment and handles the back discharging.
The protection gas that the protection gas of stove adopts said apparatus to produce.Total supply air line on the whole stove should be equipped with the control corresponding valve, guarantees that air feed is stable, unimpeded, the safety of gas circuit.
The water coolant of discharging from cooling room adopts the open fire discharging, and whether operator can estimate water coolant at any time normal, avoids accidents caused.
Be the energy-saving effect that example explanation is utilized heat treatment furnace of the present invention with stove at the bottom of the roller with 15T/h normalizing throughput below, specifically see the following form:
Claims (2)
1, a kind of heat treatment furnace with built-in euthermic gas generation device comprises loading bay, preheating chamber, heating chamber, cooling room, discharge pedestal; It is characterized in that: be provided with the mixing burner of heat release formula gas generating unit in the preheating chamber of this heat treatment furnace, this gas generating unit is used for producing this heat treatment furnace at the required restitutive protection's gas of heat treatment process; Described gas generating unit comprises also and is used for the inflammable gas of preset ratio is sent into inflammable gas admission passage in the mixing burner, is used for the air of preset ratio is sent into air admission passage in the mixing burner that described inflammable gas admission passage and air admission passage are respectively arranged with flowrate control valve in passage separately.
2, heat treatment furnace with built-in euthermic gas generation device according to claim 1 is characterized in that: the inflammable gas that this gas generating unit adopts is a Sweet natural gas; The volume ratio of described Sweet natural gas and air is 18～9: 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810019851A CN100577823C (en) | 2008-03-19 | 2008-03-19 | Heat treatment furnace with built-in euthermic gas generation device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200810019851A CN100577823C (en) | 2008-03-19 | 2008-03-19 | Heat treatment furnace with built-in euthermic gas generation device |
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| Publication Number | Publication Date |
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| CN101250614A CN101250614A (en) | 2008-08-27 |
| CN100577823C true CN100577823C (en) | 2010-01-06 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101571355B (en) * | 2009-06-01 | 2011-01-05 | 苏州中门子科技有限公司 | Strong loop quick cooling chamber |
| CN101892366B (en) * | 2010-07-22 | 2011-11-09 | 南京钢铁股份有限公司 | Low oxygen content and low nitrogen consumption control system and method for radiant tube-heated non-oxidation roller hearth furnace |
| CN102051468B (en) * | 2010-12-07 | 2012-12-26 | 苏州中门子科技有限公司 | Reducing atmosphere heat treatment furnace |
| CN105567933A (en) * | 2015-12-16 | 2016-05-11 | 宁波高新区世代能源科技有限公司 | Efficient energy-saving and environment-friendly stainless steel heat treating machine |
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