CN216514007U - Bottom furnace of dispersive and staggered circulation heating roller - Google Patents
Bottom furnace of dispersive and staggered circulation heating roller Download PDFInfo
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- CN216514007U CN216514007U CN202122950921.2U CN202122950921U CN216514007U CN 216514007 U CN216514007 U CN 216514007U CN 202122950921 U CN202122950921 U CN 202122950921U CN 216514007 U CN216514007 U CN 216514007U
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Abstract
The utility model relates to a distributed and staggered circular current heating roller hearth furnace, which comprises a furnace body and a furnace roller way, wherein a plurality of groups of first combustion smoke exhaust assemblies are arranged on a first side furnace wall, each group of first combustion smoke exhaust assemblies comprises a first split self-preheating burner unit, each first split self-preheating burner unit comprises a first burner and a first heat exchanger, the first burner is positioned below the furnace roller, and the first heat exchanger is positioned above the furnace roller. Be equipped with a plurality of second burning assemblies of discharging fume on second side brickwork, every group second burning assemblies of discharging fume includes second components of a whole that can function independently self-preheating burner unit, and every second components of a whole that can function independently self-preheating burner unit includes second nozzle and second heat exchanger, and the second nozzle is located the top of stove roller, and the second heat exchanger is located the below of stove roller, along the stove length direction multiunit first burning assemblies of discharging fume and multiunit second burning assemblies of discharging fume staggered arrangement. The utility model can make the furnace temperature more uniform, the heat exchange efficiency is high, the air preheating temperature is high, the energy consumption is low, and the investment is less.
Description
Technical Field
The utility model relates to the technical field of heat treatment equipment, in particular to a dispersed staggered circular-current heating roller hearth furnace.
Background
The steel industry is an energy-consuming large household in the industrial field, energy conservation and environmental protection are important factors for restricting the sustainable development of the steel industry in China, and the energy-saving and consumption-reducing energy-saving energy. The energy saving and consumption reduction of heating furnaces and heat treatment furnaces in the steel industry play a very important role in steel mills. Not only influences the quality of ecological environment, but also directly relates to the benefit and future development prospect of steel enterprises.
Traditional roller-hearth heat treatment furnace usually adopts self to preheat the nozzle unit as heat supply combustion apparatus, as shown in fig. 1, self preheats nozzle unit 01 and adopts nozzle and heat exchanger 011 (also can be called the pre-heater) integrated as an organic whole, combustion air and gas are at nozzle inner passage multi-stage mixing, realize abundant burning, form longer flame shape, the flue gas is discharged by nozzle outer loop passageway, be equipped with fin convection type air heat exchanger in the outer loop passageway of nozzle, carry out the heat exchange with the flue gas, retrieve the waste heat. Adopt the roller hearth heat treatment furnace of heat supply, integration nozzle of discharging fume, owing to receive the constrictive restriction in heat transfer space, heat exchange efficiency is not high, all is equipped with two rows of self and preheats the nozzle unit on the both sides stove wall of furnace body when arranging the nozzle, and one of them row is located stove roller top, and another row is located stove roller below, and each self on the both sides stove wall preheats the nozzle unit and arranges in the stove length direction in a staggered way, ensures that the steel sheet temperature is even. The traditional self-preheating burner has the advantages of compact structure and small occupied space of a single burner, but has the following defects:
(1) because the nozzle is integrated with the heat exchanger, the heat exchanger volume receives the restriction, and heat transfer area is limited, and air preheating temperature is not high, leads to heat exchange efficiency low, and exhaust gas temperature is higher, and energy-conserving effect is relatively poor. (2) Because the heat supply and the smoke discharge are at the same position, the flame is easy to be short-circuited, a small amount of unburnt components are directly discharged from the flue without entering the hearth, and the energy is wasted. (3) The upper and lower spaces of the hearth are required to be provided with burners, the number of the burners is large, connecting pipelines are complex, and the investment cost is high.
Therefore, the inventor provides a distributed staggered circulation heating roller hearth furnace by virtue of experience and practice of related industries for many years so as to overcome the defects in the prior art.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a dispersed staggered circular-flow heating roller hearth furnace, which can ensure that the furnace temperature is more uniform, is more favorable for ensuring the uniformity of the temperature of a steel plate, and has the advantages of high heat exchange efficiency, high air preheating temperature, low energy consumption and less investment.
The utility model aims to realize the scattered and staggered circular current heating roller hearth furnace, which comprises a furnace body and furnace roller ways positioned in the furnace body, wherein the furnace roller ways comprise a plurality of furnace rollers arranged at intervals along the furnace length direction; a plurality of groups of first combustion smoke exhaust assemblies are arranged on a first side furnace wall of the furnace body at intervals along the furnace length direction, each group of first combustion smoke exhaust assemblies comprises at least one first split type self-preheating burner unit, each first split type self-preheating burner unit comprises a first burner and a first heat exchanger which are installed in pairs, the first burner is positioned below the furnace roller, and the first heat exchanger is positioned above the furnace roller; a plurality of second combustion smoke exhaust assemblies are arranged on a second side furnace wall of the furnace body at intervals along the furnace length direction, each group of second combustion smoke exhaust assemblies comprises at least one second split self-preheating burner unit, each second split self-preheating burner unit comprises a second burner and a second heat exchanger which are installed in pairs, the second burner is positioned above the furnace roller, and the second heat exchanger is positioned below the furnace roller; the second side furnace wall is opposite to the first side furnace wall, and a plurality of groups of first combustion smoke exhaust assemblies and a plurality of groups of second combustion smoke exhaust assemblies are arranged in a staggered mode along the furnace length direction.
In a preferred embodiment of the present invention, the number of sets of first combustion exhaust assemblies is the same as the number of sets of second combustion exhaust assemblies.
In a preferred embodiment of the present invention, the number of the first split self-preheating burner units in each set of the first combustion exhaust assembly is the same as the number of the second split self-preheating burner units in each set of the second combustion exhaust assembly.
In a preferred embodiment of the present invention, each set of first combustion exhaust assemblies comprises a first split self-preheating burner unit, and each set of second combustion exhaust assemblies comprises a second split self-preheating burner unit.
In a preferred embodiment of the present invention, each set of first combustion exhaust assemblies comprises two first split self-preheating burner units, and each set of second combustion exhaust assemblies comprises two second split self-preheating burner units.
In a preferred embodiment of the utility model, a temperature measuring hole is arranged in the furnace top of the furnace body corresponding to each first split self-preheating burner unit and each second split self-preheating burner unit, and a thermocouple is arranged at each temperature measuring hole.
In a preferred embodiment of the present invention, a partition wall is further disposed in the furnace body, a wall surface of the partition wall is perpendicular to the furnace length direction, the partition wall includes an upper partition wall and a lower partition wall which are disposed opposite to each other in an up-down direction, and a predetermined gap is left between each of the upper partition wall and the lower partition wall and the furnace roller.
In a preferred embodiment of the present invention, the roller way in the furnace is used for conveying the steel plate, and the distance between the center of the first heat exchanger and the upper surface of the steel plate is 100 to 150 mm.
In a preferred embodiment of the utility model, the furnace body comprises a furnace lining refractory material layer and an outer steel structure which are sleeved inside and outside.
In a preferred embodiment of the present invention, the oven doors are disposed at both ends of the oven body, and the sealing curtains are disposed at the inner sides of the oven doors.
According to the scattered and staggered circulation heating roller bottom furnace, the burner and the heat exchanger are arranged in a split mode, and are respectively positioned on the two sides of the furnace roller, so that the heat exchange area is greatly increased, the heat exchange efficiency is high, the air preheating temperature is high, the number of the burners is greatly reduced, a pipeline system is simplified, and the better energy-saving and environment-friendly effects and the lower investment cost are achieved. Meanwhile, the multiple groups of first combustion smoke exhaust assemblies and the multiple groups of second combustion smoke exhaust assemblies are arranged in a staggered mode along the furnace length direction, and the burners in each group of first combustion smoke exhaust assemblies and the burners in the adjacent second combustion smoke exhaust assemblies form an oblique opposite side dispersing arrangement mode, so that the temperature difference formed by the temperature control sections along the discharging direction can be eliminated in the next temperature control section, the furnace gas temperature in the furnace body is ensured to be more uniform, and the uniformity of the temperature of the steel plate is ensured to be more favorable.
Drawings
The drawings are only for purposes of illustrating and explaining the present invention and are not to be construed as limiting the scope of the present invention. Wherein:
FIG. 1: is a structural diagram of a self-preheating burner unit in the prior art.
FIG. 2: the utility model provides a structural schematic diagram of a dispersed staggered circulation heating roller hearth furnace.
FIG. 3: the utility model provides a partial enlarged view of a dispersed staggered circular current heating roller hearth furnace.
FIG. 4: is a cross-sectional view taken along a-a in fig. 2.
FIG. 5: which is a cross-sectional view taken along the direction B-B in fig. 2.
FIG. 6: the temperature curve is measured by a furnace temperature tracker.
The reference numbers illustrate:
the prior art is as follows:
01. self-preheating burner units; 011. a heat exchanger.
The utility model comprises the following steps:
1. a furnace body; 11. a first side furnace wall; 12. a second side furnace wall; 13. a furnace lining refractory material layer; 14. an outer steel structure; 15. a charging furnace door; 16. a sealing curtain;
2. a furnace roller;
3. a first combustion smoke exhaust assembly; 31. a first split self-preheating burner unit; 311. a first burner; 312. a first heat exchanger;
4. a second combustion smoke exhaust assembly; 41. a second split type self-preheating burner unit; 411. a second burner; 412. a second heat exchanger;
5. a thermocouple;
6. a partition wall; 61. an upper partition wall; 62. a lower partition wall;
7. and (3) a steel plate.
Detailed Description
In order to more clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will now be described with reference to the accompanying drawings.
As shown in fig. 2 to fig. 6, the present embodiment provides a distributed staggered circulation heating roller hearth furnace, which includes a furnace body 1 and a furnace roller way located in the furnace body 1, wherein the furnace roller way includes a plurality of furnace rollers 2 arranged at intervals along the furnace length direction. Be equipped with the first burning of multiunit and discharge fume subassembly 3 along the stove length direction interval on the first side brickwork 11 of furnace body 1, the first burning of every group of subassembly 3 of discharging fume all includes at least one first split type self and preheats nozzle unit 31, and every first split type self preheats nozzle unit 31 and all includes first nozzle 311 and the first heat exchanger 312 of installation in pairs, and first nozzle 311 is located the below of stove roller 2, and first heat exchanger 312 is located the top of stove roller 2. A plurality of second combustion smoke exhaust components 4 are arranged on the second side furnace wall 12 of the furnace body 1 at intervals along the furnace length direction, each group of second combustion smoke exhaust components 4 comprises at least one second split self-preheating burner unit 41, each second split self-preheating burner unit 41 comprises a second burner 411 and a second heat exchanger 412 which are installed in pairs, the second burner 411 is located above the furnace roller 2, and the second heat exchanger 412 is located below the furnace roller 2. The second side furnace wall 12 is opposite to the first side furnace wall 11, and a plurality of groups of first combustion smoke exhaust assemblies 3 and a plurality of groups of second combustion smoke exhaust assemblies 4 are arranged in a staggered manner along the furnace length direction.
Specifically, the dispersion cross circulation heating roller hearth furnace in the present embodiment belongs to a roller hearth type heat treatment furnace, and a roller table in the furnace is used for conveying the steel plate 7. Because the multiple sets of first combustion smoke exhaust components 3 and the multiple sets of second combustion smoke exhaust components 4 are arranged in a staggered manner along the furnace length direction, the vertical position relationship between the first burner 311 and the first heat exchanger 312 in each first split self-preheating burner unit 31 is just opposite to the vertical position relationship between the second burner 411 and the second heat exchanger 412 in the second split self-preheating burner unit 41, and the burners in each set of first combustion smoke exhaust components 3 and the burners in the adjacent second combustion smoke exhaust components 4 form a diagonally opposite side dispersed arrangement mode.
When the first combustion smoke exhaust component 3 works, high-speed smoke generated by combustion of each first combustion nozzle 311 is sprayed below the steel plate 7, and the smoke circularly flows into the upper part of the steel plate 7 from the other end of the steel plate 7 in the width direction and is sucked into the first heat exchanger 312 on the same side to perform air-smoke heat exchange; meanwhile, high-speed smoke generated by combustion is sprayed above the steel plate 7 by each second burner 411 in the second combustion smoke exhaust assembly 4, and the smoke circularly flows above the steel plate 7 from the other end of the steel plate 7 in the width direction and is sucked into the second heat exchanger 412 on the same side for air-smoke heat exchange; the air preheated by the flue gas enters the corresponding burner to participate in combustion, and the cooled flue gas is directly discharged into the corresponding smoke tube, so that the whole combustion and heat exchange cycle is realized. The area where each group of combustion smoke exhaust components is located forms a temperature control section, in each temperature control section, in the cross section along the length direction of the furnace body 1, the temperature difference of the diagonal line in the high-speed smoke circulation is the largest, and after the first burner 311 and the second burner 411 are arranged according to the temperature control section, the temperature difference formed in the previous temperature control section can be eliminated in the next temperature control section, so that the furnace temperature of each area along the furnace length direction is more uniform.
Therefore, the scattered and staggered circulation heating roller bottom furnace in the embodiment adopts the split arrangement of the burner and the heat exchanger, and the burner and the heat exchanger are respectively positioned at two sides of the furnace roller 2 (namely one is positioned above the furnace roller 2, and the other is positioned below the furnace roller 2), so that the heat exchange area is greatly increased, the heat exchange efficiency is high, the air preheating temperature is high, the number of the burners is greatly reduced, and a pipeline system is also simplified, thereby achieving better energy-saving and environment-friendly effects and lower investment cost. Meanwhile, the multiple groups of first combustion smoke exhaust components 3 and the multiple groups of second combustion smoke exhaust components 4 are arranged in a staggered mode along the furnace length direction, and the burners in each group of first combustion smoke exhaust components 3 and the burners in the adjacent second combustion smoke exhaust components 4 form an oblique opposite side dispersing arrangement mode, so that the temperature difference formed by each temperature control section along the discharging direction F (namely the advancing direction of the steel plate 7 in the furnace, wherein the direction is parallel to the furnace length direction) can be eliminated in the next temperature control section, the furnace gas temperature in the furnace body 1 is ensured to be more uniform, and the uniformity of the temperature of the steel plate 7 is ensured.
In a specific implementation manner, the number of the first combustion smoke exhaust assembly 3 is the same as that of the second combustion smoke exhaust assembly 4, so that the first combustion smoke exhaust assembly 3 and the second combustion smoke exhaust assembly 4 can be paired, and the temperature difference elimination effect is better. The number of the first split self-preheating burner units 31 in each group of the first combustion smoke exhaust assemblies 3 is the same as that of the second split self-preheating burner units 41 in each group of the second combustion smoke exhaust assemblies 4, so that the effect of eliminating the temperature difference is further ensured.
In practical application, the burners are dispersedly staggered, 1-multiple burners can be dispersedly staggered according to the permission of the mounting distance of the burners, and the number of split self-preheating burner units contained in each group of combustion smoke exhaust assemblies can be 1-multiple, so that the flexibility of practical engineering application is met. In order to effectively guarantee that the furnace temperature is more even in furnace body 1, more be favorable to the temperature of steel sheet 7 even, it is crisscross that preferred 1 ~ 2 nozzles dispersion of adoption are crisscross, can be so that the difference in temperature eliminates better, specifically corresponds following two kinds of modes:
the first method comprises the following steps: each group of first combustion smoke exhaust components 3 comprises a first split type self-preheating burner unit 31, and each group of second combustion smoke exhaust components 4 comprises a second split type self-preheating burner unit 41.
And the second method comprises the following steps: as shown in fig. 2 and 3, each group of first combustion smoke exhaust assemblies 3 includes two first split self-preheating burner units 31, and each group of second combustion smoke exhaust assemblies 4 includes two second split self-preheating burner units 41.
In this way, the burners are staggered in pairs, that is, every two burners are staggered in a dispersed manner, each group of combustion smoke exhaust assembly comprises two split self-preheating burner units, two first burners 311 in the first combustion smoke exhaust assembly 3 are arranged in parallel at intervals, two second burners 411 in the second combustion smoke exhaust assembly 4 are arranged in parallel at intervals, and the two first burners 311 in the first combustion smoke exhaust assembly 3 and the two second burners 411 in the second combustion smoke exhaust assembly 4 form oblique and diagonal dispersed staggered arrangement. A pair of first nozzles 311 (namely two first nozzles 311) are used for burning below the hearth, and flue gas circularly enters the upper part of the hearth from the lower part of the hearth and then enters the first heat exchanger 312 above the hearth for discharging; and a pair of adjacent second burners 411 (namely two second burners 411) is installed from the upper oblique opposite side of the hearth, and the flue gas circularly enters the lower part of the hearth from the upper part of the hearth and then enters a second heat exchanger 412 at the lower part to be discharged. The burners are arranged in a pairwise dispersing and oblique and diagonal staggered manner, combustion flue gas flows around the surface of the steel plate 7 at a high speed in an annular manner, gas flowing in a hearth and oblique and diagonal dispersing and staggered arrangement are good, and the furnace temperature and the steel plate 7 are heated more uniformly.
Further, a temperature measuring hole is arranged in the furnace top of the furnace body 1 corresponding to each first split self-preheating burner unit 31 and each second split self-preheating burner unit 41, and a thermocouple 5 is arranged at each temperature measuring hole. Each burner corresponds to a thermocouple 5, the combustion state of the burner can be grasped and adjusted through the temperature feedback of the thermocouple 5, and the complete combustion of a combustion medium is ensured. When the furnace temperature control device is used, a corresponding digital pulse control system is adopted to combine with feedback of the thermocouple 5, digital zoning is achieved in control, different distribution of heat supply of the governed area is controlled, the thermocouple 5 and the burner are optimally combined, and more accurate furnace temperature control is achieved.
As shown in fig. 2, a partition wall 6 is generally provided in the furnace body 1, the wall surface of the partition wall 6 is perpendicular to the furnace length direction, the partition wall 6 includes an upper partition wall 61 and a lower partition wall 62 which are arranged in an up-down opposite manner, and a predetermined gap is left between each of the upper partition wall 61 and the lower partition wall 62 and the furnace rolls 2 so as to ensure that the partition wall 6 does not interfere with the operation of the steel plates 7 and the furnace rolls 2. The number and the setting position of the specific partition walls 6 are determined according to the temperature control requirement, and different heating sections are divided by the partition walls 6, so that the temperature control precision of each section can be ensured.
Because the steel plate 7 is heated by adopting the high-speed flue gas circulation, the diagonal temperature difference of the steel plate is the largest on the cross section along the furnace length direction, the temperature difference can be reduced continuously by reducing the height of the hearth, and the distance between each heat exchanger and the surface of the plate blank is reduced simultaneously, the distance between the center of the first heat exchanger 312 and the upper surface of the steel plate 7 is preferably 100-150 mm in the embodiment, so that the surface flow rate of the plate blank is enhanced, the flue gas flow line is closer to the surface of the steel blank for circular heating, and the actual heat treatment requirement of the engineering can be met.
Further, the structure of furnace body 1 itself is current structure, and furnace body 1 is roughly the cuboid structure that has furnace, and furnace body 1 divide into furnace roof, furnace wall and the stove bottom that connects gradually according to from the top down order, has all seted up a plurality of burner ports and exhaust port on the furnace wall of both sides, and the burner port is used for installing the nozzle that corresponds, and the exhaust port is used for installing corresponding heat exchanger. The furnace body 1 is divided into a furnace lining refractory material layer 13 and an outer side steel structure 14 from inside to outside, a combustion port and a smoke exhaust port can penetrate through the furnace lining refractory material layer 13 and the outer side steel structure 14, the furnace lining refractory material mainly plays a role in protection and heat insulation, the outer side steel structure 14 is formed by welding steel, the outer side steel structure 14 mainly plays a role in supporting the furnace lining refractory material, various furnace equipment (a furnace door, a combustor and the like) and operation walking platforms, pipelines and the like outside the furnace, and is a framework of the whole roller hearth furnace. Two ends of the furnace body 1 are respectively provided with a furnace door (a charging furnace door 15 and a discharging furnace door), and the inner side of the furnace door is provided with a sealing curtain 16, and the sealing curtain 16 plays a role in sealing furnace gas when the furnace door is opened and reducing heat loss.
When the device is used, the steel plate 7 is centered and positioned outside the furnace, the steel plate is conveyed into the furnace by each furnace roller 2, the charging furnace door 15 is closed, a combustion medium in each burner is combusted, and the generated flue gas flows through the upper surface or the lower surface of the steel plate 7, enters the corresponding flue and is discharged out of a plant by a smoke exhaust fan. The heat of the flue gas can preheat combustion air, and the preheated air is conveyed to the burner through the corresponding pipeline to participate in combustion, so that energy is saved and consumption is reduced.
In addition, also be prior art to the structure of the nozzle of installing in pairs and heat exchanger itself and realize corresponding pipeline and the principle of burning, preheated air and discharging fume, this embodiment mainly adopts split type setting with nozzle and heat exchanger, realizes the purpose of increase heat transfer area. The structure of the burner and the heat exchanger and the process of realizing combustion, preheating air and exhausting smoke can be described by referring to the structure among the burner, the heat exchanger and the main supply and exhaust pipe mentioned in the patent with the right publication number of CN211471484U and the patent name of a roller-hearth heat treatment furnace and the patent with the publication date of 2020, 9, 11.
In conclusion, the roller hearth furnace with the scattered and staggered circulation heating function has the following advantages:
(1) the self-preheating burner unit with the independent heat exchanger is adopted to carry out high-speed flue gas circulation heating on a heat-treated plate blank, the self-preheating burner unit with the independent heat exchanger is arranged above (or below) the steel plate 7, the burner is arranged below (or above) the steel plate 7, the burner and the axis of the heat exchanger are located in the same vertical plane, air entering the burner for combustion firstly enters the heat exchanger through a corresponding pipeline system and then enters the burner after being preheated, the preheating temperature of the air is at least increased by 200 ℃, so that the heat efficiency of the burner is improved, high-speed airflow surrounds the steel plate 7 for heating, the heat exchange area is larger, the arrangement number of the burners is reduced, the space design is optimized, and the effects of high efficiency, energy conservation and environmental protection are achieved.
(2) The nozzles are arranged diagonally and diagonally, so that the temperature of the billet is more uniform, namely the temperature difference formed by the previous temperature control section is eliminated by high-speed circulation of flue gas in the next temperature control section.
(3) The nozzle is arranged in the roll table clearance of roller-hearth heat treatment furnace (nozzle and stove roller 2 arrange along ejection of compact direction F in turn promptly), and every nozzle is disposed in pairs with corresponding heat exchanger homonymy about the furnace wall, furnace below or top are arranged respectively in to whole stove nozzle dispersion is crisscross to combine pulse combustion control, effectual tissue flame has guaranteed along the ascending temperature homogeneity of stove width, more helps 7 temperatures of steel sheet more even, guarantees that the ejection of compact reaches the temperature homogeneity requirement. The burner adopts a high-speed nozzle, because the jet speed is extremely high, a part of burner gas is introduced into the outlet of the burner to dilute the flame temperature, the emission of nitrogen oxides is reduced, except that the temperature of a core combustion area is higher, the temperatures of the burner gas above and below the hearth of other areas are basically consistent, and the temperature uniformity is good.
(4) The distance between the central line of the burner and the surface of the steel plate 7 is smaller, the distance between the central line of the heat exchanger and the surface of the steel plate 7 is smaller, the flue gas flow line is closer to the surface of the steel plate 7 for cyclic heating, the temperature difference of the section of the plate blank is favorably reduced, the flue gas can be ensured to be in a high-speed circulation state on the surface of the steel plate 7, the height of the hearth is lower than that of an upper hearth of a traditional roller hearth furnace, and the investment is less. The promotion of nozzle burning flue gas blowout rate also is favorable to the promotion of slab heating rate, can shorten 7 heating times of steel sheet, reduces nitrogen oxide emission concentration simultaneously. Under the condition of the same furnace length, the heat preservation time of the steel plate 7 can be prolonged, and the temperature uniformity of the steel plate 7 is facilitated. The uniformity of the tapping temperature of the test steel plate 7 is within + -4.5 ℃, as shown in FIG. 6. The average energy consumption of the heat treatment is reduced by 20 percent. The application of the dispersive staggered high-speed flue gas circulation heating technology in the roller-hearth heat treatment furnace in the embodiment realizes the expected targets of low investment, high output, energy conservation and consumption reduction, and the production indexes such as productivity, same-plate temperature difference and the like exceed the expected indexes, thereby obtaining better effect. The size of the heat exchanger in the flue can be adjusted according to the requirement of preheating temperature, so that the temperature of the preheated air is higher and reaches more than 500 ℃, and the heat efficiency of the furnace is high.
(5) The whole scattered and staggered circulation heating roller bottom furnace is heated in a scattered and staggered circulation mode, namely, high-speed flue gas flow generated by a burner is scattered and staggered and circulated around a heated plate blank, so that the effect of quickly and uniformly heating is realized. The temperature of the heat treatment furnace of the roller hearth furnace can be accurately controlled by dispersing and staggering and adopting the corresponding thermocouple 5 for each burner, and the temperature uniformity is kept good. Is particularly suitable for the heat treatment requirement of medium plates, and has the advantage that the traditional roller hearth heat treatment furnace can not be replaced. In a word, the unique combustion and smoke exhaust system and the furnace shape structure with good furnace gas circulation are combined with the pulse digital combustion control technology, so that the steel plate 7 can be heated in the roller hearth type heat treatment furnace at uniform temperature, the corresponding heat treatment requirements are met, the furnace temperature is uniform, the air preheating temperature is high, the energy consumption is low, and the investment is low. The defects of poor energy-saving effect, high manufacturing cost, high pollutant emission and the like of the traditional roller hearth furnace are overcome.
The above are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention. Any equivalent changes and modifications that can be made by one skilled in the art without departing from the spirit and principles of the utility model should fall within the protection scope of the utility model.
Claims (10)
1. A bottom furnace of a dispersed and staggered circulation heating roller comprises a furnace body and a furnace roller way positioned in the furnace body, wherein the furnace roller way comprises a plurality of furnace rollers arranged at intervals along the furnace length direction; it is characterized in that the preparation method is characterized in that,
a plurality of groups of first combustion smoke exhaust assemblies are arranged on a first side furnace wall of the furnace body at intervals along the furnace length direction, each group of first combustion smoke exhaust assemblies comprises at least one first split type self-preheating burner unit, each first split type self-preheating burner unit comprises a first burner and a first heat exchanger which are installed in pairs, the first burner is positioned below the furnace roller, and the first heat exchanger is positioned above the furnace roller;
a plurality of second combustion smoke exhaust components are arranged on a second side furnace wall of the furnace body at intervals along the furnace length direction, each group of second combustion smoke exhaust components comprises at least one second split self-preheating burner unit, each second split self-preheating burner unit comprises a second burner and a second heat exchanger which are installed in pairs, the second burner is positioned above the furnace roller, and the second heat exchanger is positioned below the furnace roller; the second side furnace wall is opposite to the first side furnace wall, and a plurality of groups of the first combustion smoke exhaust assemblies and a plurality of groups of the second combustion smoke exhaust assemblies are arranged in a staggered mode along the furnace length direction.
2. The dispersed staggered circulating current heated roller hearth furnace of claim 1,
the number of groups of the first combustion smoke exhaust assemblies is the same as the number of groups of the second combustion smoke exhaust assemblies.
3. The dispersed staggered circulating current heated roller hearth furnace of claim 1,
the number of the first split type self-preheating burner units in each group of the first combustion smoke exhaust assemblies is the same as that of the second split type self-preheating burner units in each group of the second combustion smoke exhaust assemblies.
4. The dispersed staggered circulating current heated roller hearth furnace of claim 1,
each group of the first combustion smoke exhaust assembly comprises one first split type self-preheating burner unit, and each group of the second combustion smoke exhaust assembly comprises one second split type self-preheating burner unit.
5. The dispersed staggered circulating current heated roller hearth furnace of claim 1,
each group of the first combustion smoke exhaust assembly comprises two first split self-preheating burner units, and each group of the second combustion smoke exhaust assembly comprises two second split self-preheating burner units.
6. The dispersed staggered circulating current heated roller hearth furnace of claim 1,
and temperature measuring holes are formed in the furnace top of the furnace body corresponding to the positions of each first split type self-preheating burner unit and each second split type self-preheating burner unit, and a thermocouple is arranged at each temperature measuring hole.
7. The dispersed staggered circulating current heated roller hearth furnace of claim 1,
still be equipped with the partition wall in the furnace body, the wall perpendicular to of partition wall the furnace length direction, the partition wall is including being about just last partition wall and the lower partition wall of setting up, go up the partition wall with down the partition wall all with leave the clearance of predetermineeing between the stove roller.
8. The dispersed staggered circulating current heated roller hearth furnace of claim 1,
the roller way in the furnace is used for conveying steel plates, and the distance between the center of the first heat exchanger and the upper surface of the steel plate is 100-150 mm.
9. The dispersed staggered circulating current heated roller hearth furnace of claim 1,
the furnace body is including being furnace lining refractory material layer and the outside steel construction that the endotheca was established.
10. The dispersed staggered circulating current heated roller hearth furnace of claim 1,
furnace doors are arranged at two ends of the furnace body, and sealing curtains are arranged on the inner sides of the furnace doors.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115323158A (en) * | 2022-08-23 | 2022-11-11 | 北京首钢股份有限公司 | Method for improving productivity of heating furnace of hot continuous rolling production line |
| CN116121521A (en) * | 2022-11-14 | 2023-05-16 | 河北太行钢铁集团有限公司 | Heating furnace device and heating system thereof |
| CN116121521B (en) * | 2022-11-14 | 2024-05-14 | 河北太行钢铁集团有限公司 | Heating furnace device and heating system thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115323158A (en) * | 2022-08-23 | 2022-11-11 | 北京首钢股份有限公司 | Method for improving productivity of heating furnace of hot continuous rolling production line |
| CN116121521A (en) * | 2022-11-14 | 2023-05-16 | 河北太行钢铁集团有限公司 | Heating furnace device and heating system thereof |
| CN116121521B (en) * | 2022-11-14 | 2024-05-14 | 河北太行钢铁集团有限公司 | Heating furnace device and heating system thereof |
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