CN208121160U - Wide and Thick Slab lonneal roller bottom furnace system with flue gas strong convection circulator - Google Patents
Wide and Thick Slab lonneal roller bottom furnace system with flue gas strong convection circulator Download PDFInfo
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- CN208121160U CN208121160U CN201820567238.6U CN201820567238U CN208121160U CN 208121160 U CN208121160 U CN 208121160U CN 201820567238 U CN201820567238 U CN 201820567238U CN 208121160 U CN208121160 U CN 208121160U
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Abstract
The utility model provides a kind of Wide and Thick Slab lonneal roller bottom furnace system with flue gas strong convection circulator, the furnace roller top of the soaking zone of furnace at Wide and Thick Slab lonneal roller bottom, along the length direction of stove, it is provided with several flue gas strong convection circulator, adjacent flue gas strong convection circulator is end to end, flue gas strong convection circulator includes centrifugal blower, water conservancy diversion air-suction duct, water conservancy diversion wind pipe and upper burner, the flame ejiction opening of upper burner is connected with water conservancy diversion air-suction duct, the air inlet of centrifugal blower is connect with water conservancy diversion air-suction duct, the air outlet of centrifugal blower is connected with water conservancy diversion wind pipe.Flue gas strong convection circulator described in the utility model is far longer than mixing effect caused by agitation fan to the mixing of burner hearth flue gas, stirring, convection current and intensity of circulation, therefore under conditions of fire box temperature is very low, it is more able to achieve the uniformity of flue-gas temperature and the control precision of flue-gas temperature, to ensure that the temperature uniformity of Wide and Thick Slab.
Description
Technical field
The utility model belongs to Wide and Thick Slab lonneal technical field, has flue gas strong convection circulation more particularly, to one kind
The Wide and Thick Slab lonneal roller bottom furnace system of device.
Background technique
Usually thickness 4mm or more, the steel plate of width 2800mm or more is known as Wide and Heavy Plates, is commonly called as Wide and Thick Slab people.
Wide and Thick Slab is widely used, be mainly used for build large bridge, high-pressure boiler, pressure vessel, tank, armored vehicle,
Large-scale naval vessels, aircraft carrier etc..The Wide and Thick Slab of certain trades mark is in order to reach the mechanical property of requirement (for example, high-strength abrasion-proof steel
Plate), its heat treatment process generallys use quenching+lonneal.Tissue is based on martensite after the quenching of Wide and Thick Slab, volume
Percentage accounts for about 98% (residue about 2% is retained austenite) of total amount.Austenite structure differed with martensitic structure specific volume compared with
Greatly, quenching process austenite is changed into martensitic volume and expands, therefore quenched Wide and Thick Slab can have centainly interior and answer
Power.Low-temperature tempering heat treatment after steel plate quenching, generally at 150~300 DEG C, drawing process is only precipitated on a small quantity and horse tempering temperature
Family name's body parent phase keeps the ε-carbide of symbiosis and epibiosis, can effectively eliminate the internal stress of Wide and Thick Slab in this way, improves the mechanics of Wide and Thick Slab
Performance.For Wide and Thick Slab during low-temperature tempering heat treatment, its bulk temperature uniformity is better, then its whole mechanical property is got over
It is good.The heat treatment process of the lonneal of the Wide and Thick Slab of certain high quality usually requires that plate temperature uniformity≤± 5 DEG C.
The low-temperature tempering heat treatment technique of Wide and Thick Slab usually carries out on the furnace of roller bottom.This roller bottom furnace furnace roller top and
Lower part is typically designed with the burner of open firing, several are arranged for hot arc along furnace length direction, heats to Wide and Thick Slab.
The burner of this open firing, the temperature in burner flame region is up to 1000 DEG C or more, and lonneal requires furnace
Bore temperature is very low, generally at 150~300 DEG C.This results in the flue-gas temperature gradient in burner hearth bigger.This will lead to Wide and Thick Slab
Whole heating temperature it is uneven, to influence the mechanical property and quality of Wide and Thick Slab.
In order to improve the uniformity of chamber flue gas temperature, at the heat of plate temperature uniformity≤± 5 DEG C when reaching lonneal
The requirement of science and engineering skill, some enterprises are provided with the means such as the mixing of agitation fan reinforcing flue gas in the soaking zone of roller bottom furnace,
Certain effect is played, but effect is also less significant.
Summary of the invention
In view of this, the utility model is directed to a kind of Wide and Thick Slab lonneal with flue gas strong convection circulator
Roller bottom furnace system, to solve the above technical problems.
In order to achieve the above objectives, the technical solution of the utility model is realized in：
Wide and Thick Slab lonneal roller bottom furnace system with flue gas strong convection circulator, at Wide and Thick Slab lonneal roller bottom
The furnace roller top of the soaking zone of furnace is provided with several flue gas strong convection circulator along the length direction of stove, adjacent
Flue gas strong convection circulator is end to end, and flue gas strong convection circulator includes that centrifugal blower, water conservancy diversion air-suction duct, water conservancy diversion go out
The flame ejiction opening of air piping and upper burner, upper burner is connected with water conservancy diversion air-suction duct, the air inlet of centrifugal blower and water conservancy diversion
Air-suction duct connection, the air outlet of centrifugal blower are connected with water conservancy diversion wind pipe.
Further, water conservancy diversion air-suction duct is evenly distributed with several slits on the end face of Wide and Thick Slab, and slit is by water conservancy diversion
It is connected to inside air-suction duct with burner hearth inside.
Further, the air outlet of water conservancy diversion wind pipe is towards Wide and Thick Slab.
Further, the air outlet of water conservancy diversion wind pipe is tilted towards water conservancy diversion air-suction duct.
Further, the tilt angle of the air outlet of water conservancy diversion wind pipe is 45 degree.
Further, the thermoelectricity for real-time monitoring feedback flue-gas temperature is provided at the air outlet of water conservancy diversion wind pipe
It is even.
Further, centrifugal blower is mounted at the top of furnace body, and water conservancy diversion wind pipe passes through fixed at the top of suspender member and furnace body.
Further, water conservancy diversion air-suction duct is fixed on the lower section of water conservancy diversion wind pipe, while also being located under centrifugal blower
End.
Further, the width of the length covering Wide and Thick Slab of water conservancy diversion air-suction duct, the air outlet of water conservancy diversion wind pipe cover
The width of lid Wide and Thick Slab.
Further, upper burner is mounted on the furnace body side wall on furnace roller top.
Compared with the existing technology, the Wide and Thick Slab lonneal described in the utility model with flue gas strong convection circulator
Roller bottom furnace system has the advantage that：
(1) flue gas strong convection circulator described in the utility model is to the mixing of burner hearth flue gas, stirring, convection current and circulation
Under conditions of intensity is far longer than mixing effect caused by agitation fan, therefore fire box temperature is very low, the Novel flue gas is right by force
Stream circulator is more able to achieve the uniformity of flue-gas temperature and the control precision of flue-gas temperature, to ensure that the temperature of Wide and Thick Slab
Uniformity；
(2) flue gas described in the utility model is thoroughly mixed after samming from water conservancy diversion discharge pipe in strong convection circulator
The outlet in road quickly sprays, and the flue-gas temperature of high speed ejection is uniform, and the thermocouple real-time monitoring for being arranged in water conservancy diversion wind pipe is anti-
Flue-gas temperature is presented, Combustion System is carried out to burner by Combustion System program, to precisely realize temperature-controlled precision；
(3) the utility model from the flue gas of water conservancy diversion wind pipe high speed ejection in freeze profile at strong convection Perturbation, from
And ensure that the temperature uniformity of Wide and Thick Slab, and impact since flue gas produces strong convection current to steel plate, it substantially increases low
Warm flue gas reaches the time of surface temperature so as to shorten steel plate core temperature to the heat transfer rate of steel plate.
Detailed description of the invention
The attached drawing for constituting a part of the utility model is used to provide a further understanding of the present invention, this is practical new
The illustrative embodiments and their description of type are not constituteed improper limits to the present invention for explaining the utility model.?
In attached drawing：
Attached drawing 1 is the structural schematic diagram at the soaking zone of lonneal roller bottom furnace described in the utility model embodiment；
Attached drawing 2 is the diagrammatic cross-section in Fig. 1 at A-A；
Attached drawing 3 is the main view of flue gas strong convection circulator described in the utility model embodiment；
Attached drawing 4 is the right view of flue gas strong convection circulator described in the utility model embodiment；
Attached drawing 5 is the top view of flue gas strong convection circulator described in the utility model embodiment；
Attached drawing 6 is the general construction schematic diagram of the utility model embodiment.
Description of symbols：
1, roller bottom furnace；2, flue gas strong convection circulator；201, water conservancy diversion air-suction duct；202, centrifugal blower；203, water conservancy diversion
Wind pipe；3, thermocouple；4, Wide and Thick Slab；5, upper burner；6, lower burner；7, furnace roller；8, furnace wall.
Specific embodiment
It should be noted that in the absence of conflict, the feature in the embodiments of the present invention and embodiment can
To be combined with each other.
In the description of the present invention, it should be understood that term " center ", " longitudinal direction ", " transverse direction ", "upper", "lower",
The orientation or positional relationship of the instructions such as "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is
It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of describing the present invention and simplifying the description, rather than indicate
Or imply that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore cannot understand
For limitations of the present invention.In addition, term " first ", " second " etc. are used for description purposes only, and should not be understood as indicating
Or it implies relative importance or implicitly indicates the quantity of indicated technical characteristic." first ", " second " etc. are defined as a result,
Feature can explicitly or implicitly include one or more of the features.It is in the description of the present invention, unless another
It is described, the meaning of " plurality " is two or more.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be mechanical connection, be also possible to be electrically connected；Can be directly connected, can also indirectly connected through an intermediary,
It can be the connection inside two elements.For the ordinary skill in the art, on being understood by concrete condition
State the concrete meaning of term in the present invention.
The utility model will be described in detail below with reference to the accompanying drawings and embodiments.
As shown in Figures 1 to 6, with the Wide and Thick Slab lonneal roller bottom furnace system of flue gas strong convection circulator, generous
It is right by force to be provided with several flue gases along the length direction of stove for 7 top of furnace roller of the soaking zone of 4 lonneal roller bottom furnace 1 of plate
Flow circulator 2.Adjacent flue gas strong convection circulator 2 is end to end.
As shown in Fig. 1 to 5, flue gas strong convection circulator 2 includes centrifugal blower 202, water conservancy diversion air-suction duct 201, water conservancy diversion
Wind pipe 203 and upper burner 5.Upper burner 5 is mounted on the furnace body side wall on 7 top of furnace roller, the flame ejiction opening of upper burner 5 with
Water conservancy diversion air-suction duct 201 is connected.Centrifugal blower 202 is mounted at the top of furnace body.The air inlet of centrifugal blower 202 and water conservancy diversion air draught
Pipeline 201 connects, and the air outlet of centrifugal blower 202 is connected with water conservancy diversion wind pipe 203, and water conservancy diversion wind pipe 203 passes through hanging
It is fixed at the top of part and furnace body.Towards water conservancy diversion air-suction duct 201 while the air outlet of water conservancy diversion wind pipe 203 is towards Wide and Thick Slab 4
Inclination, the tilt angle of the air outlet of water conservancy diversion wind pipe 203 are 45 degree.It is provided at the air outlet of water conservancy diversion wind pipe 203
Thermocouple 3 for real-time monitoring feedback flue-gas temperature.Water conservancy diversion air-suction duct 201 is fixed on the lower section of water conservancy diversion wind pipe 203,
It also is located at the lower end of centrifugal blower 202 simultaneously.
Preferably, the lower steel plate of water conservancy diversion air-suction duct 201 is evenly distributed with several slits, and slit is convenient for original in burner hearth
Flue gas be inhaled into the inside of water conservancy diversion air-suction duct 201 and the high-temperature flue gas generated with the burning of upper burner 5 is sufficiently mixed.Water conservancy diversion air draught
Pipeline 201 is the rectangular duct being made by steel plate, the width of the length covering Wide and Thick Slab 4 of water conservancy diversion air-suction duct 201.Water conservancy diversion
The width of wind pipe 203 also covers the width of Wide and Thick Slab 4, the width of the air outlet covering Wide and Thick Slab 4 of water conservancy diversion wind pipe 203
Degree.
It is provided with lower burner 6 on the furnace wall 8 of 7 lower section of furnace roller, is provided with several thermocouples 3 in the furnace of 7 lower section of furnace roller.
The working principle of the utility model.
Wide and Thick Slab 4 continuously moves forward on the furnace roller 7 in roller bottom furnace 1 along conveying direction.What Wide and Thick Slab 4 travelled forward
Meanwhile it being disposed in upper burner 5 and lower burner 6 on 1 furnace wall 8 of roller bottom furnace and burning generated flue gas.
For in the low-temperature tempering heat treatment technique of Wide and Thick Slab 4, Wide and Thick Slab 4 needs to be heated approximately to 150 in roller bottom furnace 1
Some temperature between~300 DEG C, therefore also require the flue-gas temperature of burner hearth very low, generally also at 150~300 DEG C or so, base
This is heated to warm temperature close to Wide and Thick Slab 4.Wide and Thick Slab 4 be heated to technique requirement temperature after, in roller bottom furnace 1 after
Continuous maintain completes the technique of soaking and heat preservation requirement inside and outside steel plate under technological temperature.
The overall mechanical properties undulating value after tempering heat treatment in order to guarantee certain Wide and Thick Slabs 4 is smaller, certain high quality
The heat treatment process of lonneal of Wide and Thick Slab 4 usually require that plate temperature uniformity≤± 5 DEG C.Therefore it must assure that roller bottom furnace 1
The chamber flue gas temperature of soaking zone is uniform, and the control precision of chamber flue gas temperature is high.Therefore have in the soaking zone design of roller bottom furnace 1
Several flue gas strong convection circulator 2 then meet such requirement.
The high-temperature flue gas that the burning of upper burner 5 being mounted on furnace wall 8 generates is low with the burner hearth of inspiration water conservancy diversion air-suction duct 201
Water conservancy diversion wind pipe 203 is blown to by centrifugal blower 202 after warm flue gas mixing, the mixed uniform flue gas of temperature passes through
The guidance of water conservancy diversion wind pipe 203, is blown in burner hearth again.The flue gas of burner hearth and the flue gas in original burner hearth are blown into one
Step mixing forms strong convection heat transfer to Wide and Thick Slab 4.In the exit of water conservancy diversion wind pipe 203, design has temperature-control heat couple 3, leads to
The temperature signal for crossing the thermocouple 3 feedback, by the PID sequential operation of computer, to control the burning of upper burner 5.Due to leading
The flue gas temperature difference very little at the gas outlet of air piping 203 is flowed out, very uniformly, therefore temperature measured by thermocouple 3 at this
The flue-gas temperature at the gas outlet of entire water conservancy diversion wind pipe 203 is just represented completely.To precisely realize the temperature control essence of flue gas
Degree.From the flue gas of 203 high speed ejection of water conservancy diversion wind pipe in freeze profile at strong convection Perturbation, to ensure that Wide and Thick Slab 4
Temperature uniformity.Under the conditions of 4 low temperature of Wide and Thick Slab (150~300 DEG C) tempering heat treatment process, the temperature uniformity of flue gas can
To reach≤± 2.5 DEG C, the temperature-controlled precision of flue gas can achieve≤± 1 DEG C, and the whole temperature uniformity of Wide and Thick Slab 4 can achieve
≤ ± 3.5 DEG C, and impacted since flue gas forms strong convection current to Wide and Thick Slab 4, low-temperature flue gas is substantially increased to steel plate
Heat transfer rate reaches the time of surface temperature so as to shorten 4 core temperature of Wide and Thick Slab.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model
Protection scope within.
Claims (10)
1. the Wide and Thick Slab lonneal roller bottom furnace system with flue gas strong convection circulator, it is characterised in that：It is low in Wide and Thick Slab
Furnace roller (7) top of the soaking zone of temperature tempering roller bottom furnace is provided with several flue gas strong convections and follows along the length direction of stove
Loop device (2), adjacent flue gas strong convection circulator (2) is end to end, and flue gas strong convection circulator (2) includes centrifugation wind
Machine (202), water conservancy diversion air-suction duct (201), water conservancy diversion wind pipe (203) and upper burner (5), the flame ejiction opening of upper burner (5)
It is connected with water conservancy diversion air-suction duct (201), the air inlet of centrifugal blower (202) is connect with water conservancy diversion air-suction duct (201), is centrifuged wind
The air outlet of machine (202) is connected with water conservancy diversion wind pipe (203).
2. the Wide and Thick Slab lonneal roller bottom furnace system according to claim 1 with flue gas strong convection circulator,
It is characterized in that：Water conservancy diversion air-suction duct (201) is evenly distributed with several slits on the end face of Wide and Thick Slab (4), and slit is by water conservancy diversion
Air-suction duct (201) is internal to be connected to burner hearth inside.
3. the Wide and Thick Slab lonneal roller bottom furnace system according to claim 1 with flue gas strong convection circulator,
It is characterized in that：The air outlet of water conservancy diversion wind pipe (203) is towards Wide and Thick Slab (4).
4. the Wide and Thick Slab lonneal roller bottom furnace system according to claim 3 with flue gas strong convection circulator,
It is characterized in that：The air outlet of water conservancy diversion wind pipe (203) is tilted towards water conservancy diversion air-suction duct (201).
5. the Wide and Thick Slab lonneal roller bottom furnace system according to claim 4 with flue gas strong convection circulator,
It is characterized in that：The tilt angle of the air outlet of water conservancy diversion wind pipe (203) is 45 degree.
6. the Wide and Thick Slab lonneal roller bottom according to any one of claims 1 to 5 with flue gas strong convection circulator
Furnace system, it is characterised in that：It is provided at the air outlet of water conservancy diversion wind pipe (203) for real-time monitoring feedback flue-gas temperature
Thermocouple (3).
7. the Wide and Thick Slab lonneal roller bottom according to any one of claims 1 to 5 with flue gas strong convection circulator
Furnace system, it is characterised in that：Centrifugal blower (202) is mounted at the top of furnace body, and water conservancy diversion wind pipe (203) passes through suspender member and furnace
It is fixed at the top of body.
8. the Wide and Thick Slab lonneal roller bottom according to any one of claims 1 to 5 with flue gas strong convection circulator
Furnace system, it is characterised in that：Water conservancy diversion air-suction duct (201) is fixed on the lower section of water conservancy diversion wind pipe (203), at the same also be located at from
The lower end of heart blower (202).
9. the Wide and Thick Slab lonneal roller bottom according to any one of claims 1 to 5 with flue gas strong convection circulator
Furnace system, it is characterised in that：The width of length covering Wide and Thick Slab (4) of water conservancy diversion air-suction duct (201), water conservancy diversion wind pipe
(203) width of air outlet covering Wide and Thick Slab (4).
10. the Wide and Thick Slab lonneal roller bottom furnace system according to claim 1 with flue gas strong convection circulator,
It is characterized in that：Upper burner (5) is mounted on the furnace body side wall on furnace roller (7) top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820567238.6U CN208121160U (en) | 2018-04-20 | 2018-04-20 | Wide and Thick Slab lonneal roller bottom furnace system with flue gas strong convection circulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820567238.6U CN208121160U (en) | 2018-04-20 | 2018-04-20 | Wide and Thick Slab lonneal roller bottom furnace system with flue gas strong convection circulator |
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| Publication Number | Publication Date |
|---|---|
| CN208121160U true CN208121160U (en) | 2018-11-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820567238.6U Active CN208121160U (en) | 2018-04-20 | 2018-04-20 | Wide and Thick Slab lonneal roller bottom furnace system with flue gas strong convection circulator |
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| Country | Link |
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| CN (1) | CN208121160U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108546815A (en) * | 2018-04-20 | 2018-09-18 | 特诺恩技术（天津）有限公司 | Wide and Thick Slab roller bottom furnace system with strong convection circulator |
| CN109929970A (en) * | 2019-04-28 | 2019-06-25 | 东北大学 | Low-temp temper furnace and low temperature control method in a kind of smoke gas circulating type steel plate |
-
2018
- 2018-04-20 CN CN201820567238.6U patent/CN208121160U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108546815A (en) * | 2018-04-20 | 2018-09-18 | 特诺恩技术（天津）有限公司 | Wide and Thick Slab roller bottom furnace system with strong convection circulator |
| CN109929970A (en) * | 2019-04-28 | 2019-06-25 | 东北大学 | Low-temp temper furnace and low temperature control method in a kind of smoke gas circulating type steel plate |
| CN109929970B (en) * | 2019-04-28 | 2023-09-22 | 东北大学 | Flue gas circulating type steel plate medium-low temperature tempering furnace and low temperature control method |
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