Blast furnace temperature uniformity heat treatment equipment

Abstract

A heat treatment device for blast furnace temperature uniformity comprises a cuboid hearth, the top of the hearth comprises a hearth top plate, the bottom of the hearth comprises a hearth bottom plate, an outer flow baffle is formed on the side wall in the length direction, a plurality of sub-hearths are formed in the hearth in the length direction, and a side flow baffle is formed on the side wall in the width direction. Side flow baffles are arranged among the plurality of sub-hearths; the multiple groups of hot air circulating devices are arranged in the hearth and are arranged in the multiple sub-hearths in an array mode, each hot air circulating device comprises two hot air circulating assemblies, and the two hot air circulating assemblies are arranged in the width direction of the sub-hearths; each hot air circulation assembly comprises an internal low-resistance drainage structure, a top mixing flow equalizing structure, a side independent flow equalizing structure, an in-furnace supporting flow equalizing structure, a side radiating heating device and a circulation power providing device. According to the heat treatment equipment for the blast furnace temperature uniformity, the ultra-wide multi-zone hearth blast furnace temperature uniformity can be achieved based on local decoupling and overall coupling.

Description

Technical Field

[0001] This application relates to the field of heat treatment equipment, and particularly to a heat treatment equipment for improving the temperature uniformity of a blast furnace based on the principle of local decoupling and overall coupling, which can improve the temperature uniformity of an ultra-wide multi-zone furnace chamber. Background Art

[0002] With the development of core equipment in key fields such as clean energy and aerospace towards the direction of "large-scale, large-scale, and extreme", key components of core equipment, such as superconducting magnets for fusion reactors and rocket structure shell segments, are developing towards the direction of "large scale, complex structure, integral form, lightweight materials, and precise mass". More stringent requirements are put forward for the performance indicators of the above key components, such as conventional mechanical properties, superconducting properties, etc.

[0003] In order to enable key components to obtain the required performance, heat treatment is required. Heat treatment equipment is one of the core carriers for heat treatment of key components; an important indicator for measuring the performance of heat treatment equipment is the temperature uniformity of the furnace chamber (sub-furnace chamber). Therefore, a lot of work has been done in the field of heat treatment equipment to improve the temperature uniformity of the sub-furnace chamber. However, for heat treatment equipment with a large furnace chamber, it is more difficult to improve its temperature uniformity.

[0004] Effective heating area: In this application, the effective heating area refers to the area within the furnace chamber of the heat treatment heating equipment that meets the requirements of the heat treatment process and allows the workpiece to be processed. The effective heating area is also called the effective working area.

[0005] Furnace temperature uniformity: In this application, the furnace temperature uniformity refers to the maximum deviation of the temperatures at various points within the effective heating area.

[0006] Chinese Patent Application for Invention (Application No.: 202010287908.0) discloses a heat treatment temperature equalizing heat transfer device for a large D-shaped Nb3Sn superconducting coil. By setting a D-shaped cover plate, a D-shaped temperature equalizing radiation screen, and a D-shaped bottom plate structure, the heat transfer uniformity of the device is improved. Since a temperature equalizing heat transfer device with a profiling structure is adopted, its processing object is a component with a D-shaped shape; at the same time, because the device is provided with a radiation screen, the component is mainly heated by radiation during the heating process, which is not conducive to heat treatment with medium and low temperature heating mainly by convection heating.

[0007] The Chinese invention patent application (application number: 202210289040.7) discloses a temperature uniformity guiding and circulating device for a heat treatment equipment with a super-large furnace chamber and high temperature uniformity. By setting up multiple groups of guiding and circulating systems composed of an upper air guiding structure and a lower air guiding structure, and introducing a sweeping nozzle structure and a hinge type expansion mechanism, the problems of reduced furnace temperature uniformity caused by the increase of the furnace chamber and the biting failure of the expansion joints in the height direction of the equipment are solved. The device heats the components with the hot air ejected from the nozzles on the upper air guiding structure and the lower air guiding structure. Obviously, this kind of component is suitable for closed components (such as plates, shells, spherical components), but not suitable for hollow components (such as superconducting magnets of fusion reactors, shell segments of rocket structures). Because when processing hollow components, the hot air ejected from the nozzles on the upper and lower air guiding structures collides with each other, disturbing the internal flow field of the furnace chamber and reducing the furnace temperature uniformity of the heat treatment equipment.

[0008] The Chinese invention patent application (application number: 202010052622.4) discloses a hot air circulation system and method for a low-temperature furnace. The hot air circulation system mainly consists of a centrifugal fan and a guiding device. By setting a top plate with a fan hole, a side plate with a first air guiding structure and a wind blocking device, and a bottom plate with a second air guiding structure, the air volume and air pressure entering the furnace chamber from the air outlet holes are made uniform, thus ensuring the furnace temperature uniformity. It can be seen that this invention patent application only realizes the diversion of hot air according to a predetermined structure by setting the air guiding structure, without fully dispersing and mixing the hot air. Therefore, this invention patent application does not clearly explain the furnace temperature uniformity that can be achieved by this structure. At the same time, applying this structure to the large-scale heat treatment equipment of the present invention is likely to cause hot air short circuit, reduce the furnace temperature uniformity, and even cause overburning of the components during heating.

[0009] The Chinese invention patent application (application number: 202310985594.5) discloses a furnace temperature uniformity control system and method for a train wheel heat treatment furnace. By setting a carrier frame located in a ring-shaped heating furnace and rotating with the furnace for heating, and a temperature measuring device with a control unit connected to an air valve and a gas valve to adjust the air-fuel ratio, the furnace temperature uniformity of the train wheel heat treatment furnace is improved. This is completely different from the idea of the present invention to improve the furnace temperature uniformity of the sub-furnace through an innovatively designed hot air circulation system.

[0010] Therefore, the sub-furnaces in the prior art cannot fully meet the actual needs of components such as superconducting magnets of fusion reactors and shell segments of rocket structures for sub-furnaces with a width of 8 to 12 meters and multiple zones in length. Summary of the Invention

[0011] In view of this, the present application provides a heat treatment device for high furnace temperature uniformity, which is an ultra-wide multi-zone heat treatment heating device mainly used for heat treating special materials or parts such as superconducting magnets of fusion reactors and rocket body structure shell segments. Its specific structure includes: a furnace chamber in the shape of a cuboid, the top of the furnace chamber includes a furnace chamber top plate, the bottom includes a furnace chamber bottom plate, the side walls in the length direction form outer baffle plates, and a plurality of sub-furnace chambers are formed in the furnace chamber in the length direction. The side walls in the width direction form side baffle plates, and side baffle plates are also provided between the plurality of sub-furnace chambers; a plurality of hot air circulation devices are arranged in the furnace chamber and are arranged in an array in the plurality of sub-furnace chambers. Each hot air circulation device includes two hot air circulation components, and the two hot air circulation components are arranged along the width direction of the sub-furnace chamber. Each hot air circulation component includes: an internal low-resistance diversion structure, including a diversion bottom plate in the shape of an arc, the diversion bottom plate is arranged above the side of the sub-furnace chamber, and a first-stage flow equalizing fin group is arranged on the diversion bottom plate; a top mixing and flow equalizing structure, including a circulating air top plate, the circulating air top plate is arranged above the sub-furnace chamber, and a second-stage flow equalizing fin group and a hot air baffle are fixedly arranged on the upper side of the circulating air top plate. A top hot air circulation channel is formed between the circulating air top plate and the furnace chamber top plate; a side independent flow equalizing structure, including an internal diversion plate, the internal diversion plate is attached to the outer side surface in the width direction of the sub-furnace chamber, and also includes a third-stage flow equalizing fin group, the third-stage flow equalizing fin group is arranged on the inner end surface of the outer baffle plate; an in-furnace support and flow equalizing structure is arranged in the furnace chamber and is located below the sub-furnace chamber. The in-furnace support and flow equalizing structure is a cuboid hollow frame, including an upper support plate and a lower support plate, and a plurality of intermediate columns are arranged between the upper support plate and the lower support plate. A fourth-stage flow equalizing fin group is arranged between the intermediate columns close to the internal diversion plate; a side distributed heating device is arranged between the internal diversion plate and the outer baffle plate; a circulating power supply device is arranged on the upper end surface of the furnace chamber top plate.

[0012] As a possible implementation, the diversion bottom plate is spherical or ellipsoidal, the first-stage flow equalizing fin group includes a plurality of first-stage flow equalizing fins, and the plurality of first-stage flow equalizing fins are equidistantly arranged along the circumferential direction of the spherical or ellipsoidal diversion bottom plate; a first round hole is opened at the middle position of the diversion bottom plate, and the first round hole is aligned with the circulating power supply device.

[0013] As a possible implementation, air suction holes are opened on the circulating air top plate, and the air suction holes are matched with the first round holes; the hot air baffle includes a hot air long baffle and a hot air short baffle, and the relative installation angle between the hot air long baffle and the hot air short baffle is 30 to 45 degrees, and the installation spacing is 10 to 30 millimeters.

[0014] As a possible implementation, the secondary flow equalizing fin group is composed of five secondary flow equalizing fins. The perpendicular distance from one end of the five secondary flow equalizing fins to the tangent outside the air suction hole is 600 to 800 millimeters; the other end of the five secondary flow equalizing fins is fixedly connected to the outer edge of the air circulation top plate; the middle one of the five secondary flow equalizing fins coincides with the horizontal center line of the air suction hole, and the other four are all directed towards the air suction hole and are symmetrically arranged relative to the middle one. The five secondary flow equalizing fins divide the sub-furnaces in each area into six small partitions in the length direction, and the widths of the six small partitions in the length direction are 1 / 10, 1 / 5, 1 / 5, 1 / 5, 1 / 5, and 1 / 10 of the length of the corresponding partitions respectively.

[0015] As a possible implementation, the distance between the inner deflector and the outer baffle in the furnace width direction is 250 to 500 millimeters, and an air flow channel is formed; the tertiary flow equalizing fin group includes four equally spaced tertiary flow equalizing fins, and the distance between each tertiary flow equalizing fin is 1 / 5 of the length of the corresponding partition, and there is a gap between the end of the tertiary flow equalizing fin and the inner deflector; the upper end of the tertiary flow equalizing fin is more than 300 millimeters away from the lower end of the side distributed heating device.

[0016] As a possible implementation, the quaternary flow equalizing fin group includes a plurality of quaternary flow equalizing fins, and the distance between each quaternary flow equalizing fin is 150 to 300 millimeters; the in-furnace support flow equalizing structure maintains a distance of more than 200 millimeters from the inner deflector.

[0017] As a possible implementation, a plurality of the quaternary flow equalizing fins are arranged in a stepped manner along the air flow direction, and the length direction of the quaternary flow equalizing fins forms a deflection angle of 30 to 40 degrees with the center line in the furnace width direction.

[0018] As a possible implementation, the side distributed heating device is a plurality of cage heaters or resistance bands.

[0019] As a possible implementation, the circulating power providing device includes a centrifugal stirring fan.

[0020] As a possible implementation, the diameter of the first round hole is 100 to 200 millimeters larger than the diameter of the air suction hole; the diameter of the air suction hole is 60 to 80 millimeters larger than the diameter of the air suction port of the centrifugal stirring fan. Description of the Drawings

[0021] The following further describes each technical feature of the present application and the relationships between them with reference to the accompanying drawings. The drawings are exemplary, and some technical features are not shown in actual proportions. Also, in some drawings, technical features that are conventional in the technical field to which the present application belongs and are not essential for understanding and implementing the present application may be omitted, or technical features that are not essential for understanding and implementing the present application may be additionally shown. That is, the combination of the technical features shown in the drawings is not used to limit the present application. Additionally, throughout the present application, the content referred to by the same reference numerals is the same. The specific description of the drawings is as follows:

[0022] Figure 1 It is the front sectional view of the heat treatment equipment for high furnace temperature uniformity according to an embodiment of the present application;

[0023] Figure 2 It is the side sectional view of the heat treatment equipment for high furnace temperature uniformity according to an embodiment of the present application;

[0024] Figure 3 It is the top sectional view of the heat treatment equipment for high furnace temperature uniformity according to an embodiment of the present application;

[0025] Figure 4 It is the top view of the in-furnace support and flow equalizing structure in the heat treatment equipment for high furnace temperature uniformity according to an embodiment of the present application.

[0026] Description of reference numerals: 10 - hot air circulation device; 11 - hot air circulation component; 111 - internal low-resistance flow guiding structure; 1111 - flow guiding bottom plate; 1112 - first-stage flow equalizing fin group; 1113 - first round hole; 112 - top mixing and flow equalizing structure; 1121 - circulating air top plate; 1122 - air suction hole; 1123 - hot air baffle; 1124 - second-stage flow equalizing fin group; 1125 - short hot air baffle; 1126 - long hot air baffle; 113 - side independent flow equalizing structure; 1131 - inner flow guiding plate; 1132 - outer baffle plate; 1133 - side baffle plate; 1134 - third-stage flow equalizing fin group; 114 - in-furnace support and flow equalizing structure; 1141 - upper support plate; 1142 - lower support plate; 1143 - middle column; 1144 - fourth-stage flow equalizing fin group; 115 - side dispersed heating device; 116 - circulating power providing device; 20 - furnace chamber; 21 - furnace chamber top plate; 22 - furnace chamber bottom plate. Detailed implementation manners

[0027] The following details the specific implementation manners of the present application with reference to the accompanying drawings.

[0028] As Figure 1 、 2 shown, the present application provides a heat treatment equipment for high furnace temperature uniformity, which is an ultra-wide multi-zone heat treatment heating equipment, and specifically includes a furnace chamber 20. As Figure 3As shown in the figure, multiple sub-furnaces are formed along the length direction in the furnace 20, and multiple groups of hot air circulation devices 10 are arranged in an array around the multiple sub-furnaces. Each hot air circulation device 10 includes two hot air circulation components 11, and the two hot air circulation components 11 are arranged along the width direction of a sub-furnace. Each hot air circulation component 11 is composed of an internal low-resistance drainage structure 111, a top mixing and uniform flow structure 112, a side independent uniform flow structure 113, an in-furnace support uniform flow structure 114, a side dispersed heating device 115, and a circulation power supply device 116.

[0029] In the ultra-wide multi-zone heat treatment heating equipment, "ultra-wide" means that the width of the effective heating zone of the heat treatment heating equipment is 8 to 12 meters; "multi-zone" means that the heat treatment heating equipment is partitioned in the length direction according to the hot air circulation device 10 and the number of partitions is greater than 3, the length of each zone is 4 to 8 meters, and the total length in the length direction is 8 to 40 meters.

[0030] Among them, as Figure 2 shown, the furnace 20 is in a cuboid shape. The top of the furnace 20 includes a furnace top plate 21, and the bottom includes a furnace bottom plate 22. An outer baffle 1132 is formed on the side wall along the length direction. Multiple sub-furnaces are formed along the length direction in the furnace 20, and a side baffle 1133 is formed on the side wall in the width direction. Side baffles 1133 are also provided between the multiple sub-furnaces.

[0031] In this embodiment, the furnace 20 is 8000 mm wide and is divided into 8 sub-furnaces along the length direction, and each sub-furnace is 3000 mm long.

[0032] Among them, as Figure 2 shown, the internal low-resistance drainage structure 111 includes a drainage bottom plate 1111 in an arc shape. Further, the drainage bottom plate 1111 is spherical or ellipsoidal. The drainage bottom plate 1111 is arranged above the side of the sub-furnace. A first-stage uniform flow fin group 1112 is arranged on the drainage bottom plate 1111. The first-stage uniform flow fin group 1112 includes multiple first-stage uniform flow fins, and the multiple first-stage uniform flow fins are arranged equidistantly along the circumferential direction of the spherical or ellipsoidal drainage bottom plate 1111. A first round hole 1113 is opened at the middle position of the drainage bottom plate 1111, and the first round hole 1113 is aligned with the circulation power supply device 116. Using a spherical or ellipsoidal drainage bottom plate 1111 can effectively reduce the hot air resistance. By arranging the first-stage uniform flow fins, the hot air inside the furnace 20 can be dispersed and the hot air collision can be reduced, avoiding the occurrence of hot air vortices leading to thermal short circuits.

[0033] In this embodiment, the diameter of the first round hole 1113 is 1800 mm.

[0034] In this embodiment, there are 8 first-stage uniform flow fins, and the height of each is 120 mm. Additionally, in other embodiments, the number of first-stage uniform flow fins can be 4 to 12.

[0035] Among them, as Figure 2 shown, the top mixing and uniform flow structure 112 includes a wind-circulating top plate 1121, and the wind-circulating top plate 1121 is arranged above the sub-furnace. On the upper side of the wind-circulating top plate 1121, a secondary uniform flow fin group 1124 and a hot air baffle 1123 are fixedly arranged. A top hot air circulation channel is formed between the wind-circulating top plate 1121 and the furnace top plate 21. Suction holes 1122 are formed in the wind-circulating top plate 1121, and the suction holes 1122 cooperate with the first round holes 1113. The diameter of the first round holes 1113 is 100 to 200 millimeters larger than the diameter of the suction holes 1122. The hot air baffle 1123 includes a hot air long baffle 1126 and a hot air short baffle 1125, and the two are arranged in a staggered layout at 40°, perpendicular to the wind-circulating top plate 1121, and the distance between two adjacent ones is 20 millimeters.

[0036] In this embodiment, the diameter of the suction holes 1122 is 1400 millimeters, and they are concentric circles with the first round holes 1113. The two form a cooperative air flow channel.

[0037] In this embodiment, the secondary uniform flow fin group 1124 is composed of 5 secondary uniform flow fins. The vertical distance from one end of the 5 secondary uniform flow fins to the tangent line outside the suction holes 1122 is 600 to 800 millimeters. The other end of the 5 secondary uniform flow fins is fixedly connected to the outer edge of the wind-circulating top plate 1121. The middle one of the 5 secondary uniform flow fins coincides with the horizontal center line of the suction holes 1122, and the other 4 fins all point to the suction holes 1122 and are symmetrically arranged relative to the middle one. The 5 secondary uniform flow fins divide the sub-furnaces in each area into 6 small partitions in the length direction, and the widths of the 6 small partitions in the length direction are 1 / 10, 1 / 5, 1 / 5, 1 / 5, 1 / 5, 1 / 10 of the length of the corresponding partitions respectively.

[0038] It should be noted that by setting the hot air baffle 1123, the hot air in the left and right arranged hot air circulation components 11 in the heat treatment equipment for high furnace temperature uniformity involved in this application embodiment can be prevented from influencing each other. By reasonably arranging the angles of the hot air long baffle 1126 and the hot air short baffle 1125, the impact force between the hot air provided by the circulation power supply device 116 and the hot air long baffle 1126 and the hot air short baffle 1125 can be reduced, thereby reducing the hot air loss. By setting 5 secondary uniform flow fins, the hot air can be dissipated, and the generation of hot air eddy currents can be avoided. At the same time, in the heat treatment equipment for high furnace temperature uniformity involved in this application embodiment, partition plates are not arranged between the sub-furnaces in the length direction, and the hot air in the last small partition of each area converges with the hot air in the first small partition of the adjacent next area, avoiding the influence of insufficient hot air pressure in the part far from the circulation power supply device 116 on the temperature uniformity. In addition, by setting the top mixing and uniform flow structure 112, the hot air in the top areas is coupled and influenced by each other. At the same time, by setting the hot air baffle 1123, the left and right arranged hot air circulation components 11 in each sub-furnace are decoupled from each other and do not affect each other.

[0039] Among them, as Figure 1 shown, the side independent flow equalizing structure 113 includes an inner deflector 1131 and a three-stage flow equalizing fin group 1134. The inner deflector 1131 is attached to the outer side surface in the width direction of the sub-furnace. The three-stage flow equalizing fin group 1134 is arranged on the inner end surface of the outer baffle 1132. The distance between the inner deflector 1131 and the outer baffle 1132 in the furnace width direction is 250 to 500 mm, and an air flow channel is formed.

[0040] In this embodiment, the three-stage flow equalizing fin group 1134 includes 4 equally spaced three-stage flow equalizing fins. The distance between each three-stage flow equalizing fin is 1 / 5 of the length of each corresponding partition, and there is a 40-mm gap between the end of the three-stage flow equalizing fin and the inner deflector 1131.

[0041] In this embodiment, the distance between the inner deflector 1131 and the furnace bottom plate 22 is 300 mm.

[0042] In this embodiment, the distance between the inner deflector 1131 and the outer baffle 1132 in the furnace width direction is 400 mm.

[0043] It should be noted that by arranging the inner deflector 1131, the outer baffle 1132 and the side baffles 1133 on both sides, a side independent flow equalizing structure 113 is formed in each sub-furnace. To prevent the hot air evenly dispersed by the side independent flow equalizing structure 113 from coupling and affecting each other, the three-stage flow equalizing fin group 1134 is arranged to further disperse the hot air in each area, improving the furnace temperature uniformity of the heat treatment heating equipment. In addition, by arranging the side independent flow equalizing structure 113, the hot air in each side area is decoupled from each other and does not affect each other.

[0044] Among them, as Figure 4 shown, the in-furnace support flow equalizing structure 114 is arranged in the furnace 20 and is located below the sub-furnace. The in-furnace support flow equalizing structure 114 is a cuboid hollow frame, including an upper support plate 1141 and a lower support plate 1142. A plurality of intermediate columns 1143 are arranged between the upper support plate 1141 and the lower support plate 1142. A four-stage flow equalizing fin group 1144 is arranged between the intermediate columns 1143 close to the inner deflector 1131.

[0045] In this embodiment, the four-stage flow equalizing fin group 1144 includes a plurality of four-stage flow equalizing fins. The distance between each four-stage flow equalizing fin is 200 mm. The multiple four-stage flow equalizing fins are arranged in a stepped manner along the air flow direction, and the length direction of the four-stage flow equalizing fins forms a 35-degree deflection angle with the center line in the width direction of the furnace 20.

[0046] In this embodiment, the distance between the in-furnace support flow equalizing structure 114 and the inner deflector 1131 is kept more than 200 mm.

[0047] Among them, the side partial heating device 115 is arranged between the inner diversion plate 1131 and the outer baffle 1132.

[0048] In this embodiment, the side partial heating device 115 is a plurality of squirrel-cage heaters or resistance bands.

[0049] In this embodiment, the upper end of the three-stage uniform flow fins is 400 millimeters away from the lower end of the side partial heating device 115.

[0050] It should be noted that the in-furnace support uniform flow structure 114 can support the heated component. The four-stage uniform flow fin group 1144 arranged in the in-furnace support uniform flow structure 114 can further disperse the hot air and improve the temperature uniformity of the heat treatment heating equipment in the furnace. In addition, by arranging the in-furnace support uniform flow structure 114, the hot air is decoupled from each other in the effective heating area and does not affect each other.

[0051] Among them, the circulation power providing device 116 is arranged on the upper end surface of the furnace roof 21.

[0052] In this embodiment, the circulation power providing device 116 is a centrifugal stirring fan. The diameter of the air suction hole 1122 is 60 to 80 millimeters larger than the diameter of the air suction port of the centrifugal stirring fan.

[0053] It should be noted that the operating temperature range of the heat treatment equipment with high furnace temperature uniformity involved in the embodiments of the present application is 150 to 650 degrees Celsius.

[0054] It needs to be further explained that:

[0055] 1. By arranging the internal low-resistance diversion structure 111, the hot air is decoupled from each other in the effective heating area and does not affect each other.

[0056] 2. By arranging the top mixing uniform flow structure 112, the hot air is coupled and affects each other in the top areas. At the same time, by arranging the hot air baffle 1123 in the top mixing uniform flow structure 112, the hot air circulation components 11 arranged left and right in each area are decoupled from each other and do not affect each other.

[0057] 3. By arranging the side independent uniform flow structure 113, the hot air is decoupled from each other in the side areas and does not affect each other.

[0058] 4. By arranging the in-furnace support uniform flow structure 114, the hot air is decoupled from each other in the effective heating area and does not affect each other.

[0059] In summary, the heat treatment equipment for high furnace temperature uniformity involved in the embodiments of the present application has no eddy current and thermal short circuit in an ultra-wide multi-zone furnace chamber with a width of 8 to 12 meters and the number of effective heating zones greater than 3 zones, and can achieve the temperature uniformity of the heat treatment equipment for an ultra-wide multi-zone furnace chamber with high furnace temperature uniformity, so that the furnace temperature uniformity of the heat treatment equipment for high furnace temperature uniformity involved in the embodiments of the present application is controlled within plus or minus 5 degrees Celsius. At the same time, the heat treatment equipment for high furnace temperature uniformity involved in the embodiments of the present application adopts an array and symmetric structure, can be continuously extended in the length direction, and can meet the heat treatment requirements of components with a width of 8 to 12 m and a longer length (8 to 40 m). Moreover, the heat treatment equipment for high furnace temperature uniformity involved in the embodiments of the present application adopts an array and symmetric layout, and has the advantages of simple manufacturing and convenient installation. The heat treatment equipment for high furnace temperature uniformity involved in the embodiments of the present application is particularly suitable for the heat treatment processing of special materials or parts such as superconducting magnets for fusion reactors and rocket body structure shell segments, and solves the problem of controlling the temperature uniformity of a wide furnace chamber through the coordinated control of local decoupling and overall coupling.

[0060] The term "comprising" used throughout this application should not be construed as limited to the content listed thereafter; it does not exclude other structural elements or steps.

[0061] It can be understood that those skilled in the art can combine the features mentioned in one or more of the embodiments mentioned throughout this application with the features in other embodiments in any appropriate manner to implement this application.

[0062] Note that the above is only the preferred embodiment of the present application and the technical principles applied. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and various obvious changes, re-adjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present application. Therefore, although the present application has been described in more detail through the above embodiments, the present application is not limited to the above embodiments. Without departing from the technical concept of the present application, more other equivalent embodiments can be included, all of which fall within the protection scope of the present application.

Claims

1. A heat treatment equipment with high furnace temperature uniformity, characterized in that: include: A rectangular furnace, wherein the furnace top includes a furnace top plate, the bottom includes a furnace bottom plate, the side walls along the length direction form an outer baffle plate, a plurality of sub-furnaces are formed in the furnace along the length direction, the side walls along the width direction form side baffle plates, and side baffle plates are arranged between the plurality of sub-furnaces; A plurality of hot air circulation devices are provided in the furnace and arranged in array in a plurality of sub-furnaces, each of the hot air circulation devices comprises two hot air circulation components, the two hot air circulation components are arranged along the width direction of the sub-furnace, and each of the hot air circulation components comprises: The internal low-resistance drainage structure includes an arc-shaped drainage bottom plate, which is arranged on the upper side of the sub-furnace and has a first-level flow fin group. The top mixing and equalizing flow structure comprises an air circulation top plate, which is arranged above the sub-furnace, and a secondary equalizing fin group and a hot air baffle are fixedly arranged on the upper side of the air circulation top plate, and a top hot air circulation channel is formed between the air circulation top plate and the furnace top plate. The side independent flow balancing structure includes an inner flow guide plate, which is arranged on the outer side surface of the sub-furnace width direction, and a three-stage flow balancing fin group, which is arranged on the inner end surface of the outer flow baffle plate. The furnace supporting flow balancing structure is arranged in the furnace and below the sub-furnace. The furnace supporting flow balancing structure is a rectangular hollow frame, including an upper support plate and a lower support plate. A plurality of middle columns are arranged between the upper support plate and the lower support plate. A four-stage flow balancing fin group is arranged between the middle columns close to the inner guide plate. The side diffuser heating device is arranged between the inner guide plate and the outer baffle plate, The circulating power providing device is arranged on the upper surface of the furnace top plate.

2. The heat treatment equipment for improving furnace temperature uniformity according to claim 1, characterized in that: The drainage bottom plate is spherical or ellipsoidal, and the primary flow balancing fin group includes a plurality of primary flow balancing fins, and the plurality of primary flow balancing fins are arranged equidistantly along the circumferential direction of the spherical or ellipsoidal drainage bottom plate; A first circular hole is opened in the middle of the drainage bottom plate, and the first circular hole is aligned with the circulation power providing device.

3. The heat treatment equipment for improving furnace temperature uniformity according to claim 1, characterized in that: The air circulation top plate is provided with an air suction hole, and the air suction hole matches the first circular hole; The hot air baffle comprises a long hot air baffle and a short hot air baffle. The installation relative angle of the long hot air baffle and the short hot air baffle is 30 to 45 degrees, and the installation spacing is 10 to 30 mm.

4. The heat treatment equipment for improving furnace temperature uniformity according to claim 1, characterized in that: The secondary flow balancing fin group is composed of five secondary flow balancing fins, and the vertical distance between one end of the five secondary flow balancing fins and the outer tangent of the air suction hole is 600 to 800 mm; The other ends of the five secondary flow-distributing fins are fixedly connected to the outer edge of the wind-circulating top plate; The middle one of the five secondary flow equalizing fins coincides with the transverse center line of the suction hole, and the other four fins all point to the suction hole and are symmetrically arranged with respect to the middle one. The five secondary flow equalizing fins divide the sub-furnace of each zone into six small partitions in the length direction, and the widths of the six small partitions in the length direction are 1 / 10, 1 / 5, 1 / 5, 1 / 5, 1 / 10 of the corresponding partition lengths respectively.

5. The heat treatment equipment for improving furnace temperature uniformity according to claim 1, characterized in that: The inner guide plate and the outer baffle plate are spaced 250 to 500 mm in the width direction of the furnace, and form an airflow channel; The three-stage flow balancing fin group includes four three-stage flow balancing fins that are equally spaced, the spacing between each of the three-stage flow balancing fins is 1 / 5 of the length of each corresponding partition, and there is a gap between the end of the three-stage flow balancing fin and the inner guide plate; The upper end of the three-stage flow balancing fin is greater than 300 mm away from the lower end of the side dispersion heating device.

6. The heat treatment equipment for improving furnace temperature uniformity according to claim 1, characterized in that: The four-stage flow balancing fin group includes a plurality of four-stage flow balancing fins, and the spacing between each of the four-stage flow balancing fins is 150 to 300 mm; The furnace supporting flow equalizing structure and the inner guide plate are spaced at a distance of more than 200 mm.

7. The heat treatment equipment for improving the temperature uniformity of a high furnace according to claim 6, characterized in that: The plurality of four-stage flow balancing fins are arranged in a stepped manner along the airflow direction, and a deflection angle of 30 to 40 degrees is formed between the length direction of the four-stage flow balancing fins and the center line of the furnace width direction.

8. The heat treatment equipment for improving furnace temperature uniformity according to claim 1, characterized in that: The side dispersed heating device is a plurality of squirrel cage heaters or resistance belts.

9. The heat treatment equipment for improving furnace temperature uniformity according to claim 1, characterized in that: The circulating power providing device comprises a centrifugal stirring fan.

10. The heat treatment equipment for improving furnace temperature uniformity according to claim 9, characterized in that: The diameter of the first circular hole is 100 to 200 mm larger than the diameter of the air suction hole; The diameter of the air suction hole is 60 to 80 mm larger than the diameter of the air suction port of the centrifugal stirring fan.

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