CN112229207A - Novel atmosphere protection kiln - Google Patents
Novel atmosphere protection kiln Download PDFInfo
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- CN112229207A CN112229207A CN202011064722.5A CN202011064722A CN112229207A CN 112229207 A CN112229207 A CN 112229207A CN 202011064722 A CN202011064722 A CN 202011064722A CN 112229207 A CN112229207 A CN 112229207A
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- Prior art keywords
- flue
- furnace
- wall
- cavity
- heating rod
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/04—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity adapted for treating the charge in vacuum or special atmosphere
- F27B9/045—Furnaces with controlled atmosphere
- F27B9/047—Furnaces with controlled atmosphere the atmosphere consisting of protective gases
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
- F27B9/20—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace
- F27B9/24—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace being carried by a conveyor
- F27B9/2407—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace being carried by a conveyor the conveyor being constituted by rollers (roller hearth furnace)
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
- F27B9/32—Casings
- F27B9/34—Arrangements of linings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
- F27B9/36—Arrangements of heating devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/001—Extraction of waste gases, collection of fumes and hoods used therefor
- F27D17/002—Details of the installations, e.g. fume conduits or seals
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
- F27B9/36—Arrangements of heating devices
- F27B2009/3638—Heaters located above and under the track
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
A novel atmosphere protection kiln comprises a furnace shell; the furnace bottom liner is arranged at the bottom of the furnace shell cavity; a pair of furnace wall linings arranged along the length direction of the opposite side of the cavity wall of the furnace shell cavity; the furnace top is arranged in the furnace shell cavity; sagger conveying rollers which are distributed at intervals along the length direction of the hearth; the upper heating rod and the lower heating rod are positioned above and below the sagger conveying roller; the protective gas inlet pipe penetrates through the pair of furnace wall linings and then extends out of the furnace shell; the method is characterized in that: the flue comprises a flue gas up-leading section and a flue gas out-leading section, the flue gas up-leading section is composed of a longitudinal smoke exhaust cavity and a transverse transition smoke exhaust cavity, the flue gas out-leading section is composed of a flue gas longitudinal exhaust cavity and a smoke exhaust port, the lower end of the longitudinal smoke exhaust cavity is communicated with the upper portion of the hearth, the upper end of the longitudinal smoke exhaust cavity is connected with one end of the transverse transition smoke exhaust cavity, the other end of the transverse transition smoke exhaust cavity is connected with one side of the middle portion of the flue gas longitudinal exhaust cavity, the lower portion of the flue gas longitudinal exhaust cavity is a colloid storage cavity, and the smoke exhaust port. The cleanness of the hearth and the product quality are ensured; is convenient to clean.
Description
Technical Field
The invention belongs to the technical field of kiln facilities, and particularly relates to a novel atmosphere protection kiln.
Background
The atmosphere protection furnace is called as an atmosphere protection furnace, and a certain specific gas such as nitrogen, hydrogen, mixed gas of nitrogen and hydrogen, inert gas and even oxygen is introduced according to different product process requirements in the process of sintering products at high temperature.
Technical information on the aforementioned kilns, such as CN208059547U (lithium battery material sintering roller furnace), CN210802019U (kiln), CN111351347A (double-layer roller furnace), and CN209639527U (novel flat-top roller furnace lining structure and roller furnace), etc., is not known in published chinese patent documents.
As described in the industry, many materials react during the sintering process of the kiln and release various gases and volatiles containing adhesives, which are discharged through a smoke outlet formed at the top of a hearth, namely the top of a furnace body, which is conventionally called a chimney, and are discharged after being subjected to environmental protection treatment. However, in the actual process of firing products in the kiln, it is often difficult or even impossible to avoid the situation that the glue contained in the flue gas is condensed on the exhaust flue, i.e., on the inner wall of the chimney, and the condensed glue may drip on the products in the hearth to cause pollution. The foregoing causes the colloid to drip at the root: the structure form of the chimney is a straight-through type. The straight-through chimney obviously has the advantages of small flue resistance and contribution to discharging glue-containing flue gas in a hearth, but compared with the quality problem caused by the fact that glue-containing steam meets condensation and drops into an open sagger to pollute products, the straight-through chimney is obviously more important than the straight-through chimney. In addition, the straight-through chimney also often contains the heat and loses the disadvantage of energy-conservation greatly to dissipate. In order to solve the problems, the patent scheme of the 'flue device of the atmosphere protection furnace' recommended by the Chinese patent CN209416082U changes the flue from a straight-through type in the prior art to an L-shaped flue, which can play a role in relieving the glue drops from attacking products in a sagger to a certain extent, but the L-shaped flue structure can not eliminate the problem that the glue condensed when meeting cold drops drop from the flue, and the L-shaped flue structure does not have the function of storing the dropped glue drops, so the L-shaped flue has the defects of addressing symptoms and not addressing the root causes. In addition, after the glue-containing vapor flows into the hearth when meeting the condensation knot, the effective periodic cleaning of the glue-containing vapor is very troublesome.
In view of the prior art, the positive significance of exploring the structure of the chimney on the top of the hearth, which is used for intercepting the colloid condensed in the flue gas at a reasonable position of the flue on the premise of basically not influencing the normal flue gas discharge and is beneficial to conveniently cleaning the furnace during the periodic shutdown inspection and maintenance of the furnace, is achieved under the background that the technical scheme to be introduced below is generated.
Disclosure of Invention
The invention aims to provide a novel atmosphere protection kiln which can effectively intercept and store colloid in smoke gas, which meets condensation and is formed in a reasonable position so as to clean a kiln body during routine regular shutdown, thereby avoiding dripping into the kiln or a sagger in a working state and polluting products.
The task of the invention is completed in such a way that a novel atmosphere protection kiln comprises a furnace shell; the furnace bottom lining is arranged at the bottom of a furnace shell cavity of the furnace shell along the length direction of the furnace shell; a pair of furnace wall linings respectively arranged along the length direction of the opposite side of the cavity wall of the furnace shell cavity and respectively supported at the edge part of the furnace bottom lining; a furnace top which is provided in the furnace shell cavity at a position corresponding to a space between upper portions of the pair of furnace wall linings in the longitudinal direction and which is fitted to the upper portions of the pair of furnace wall linings, wherein a space surrounded by the furnace top, the furnace bottom and the pair of furnace wall linings is formed as a furnace chamber which penetrates from one end to the other end, and a flue for discharging flue gas generated in the furnace chamber to the furnace chamber is formed at a position corresponding to each temperature zone in the longitudinal direction of the furnace chamber on the furnace top; sagger conveying rollers which are distributed at intervals along the length direction of the hearth, two ends of the sagger conveying rollers are rotatably supported on the furnace shell after respectively penetrating through the pair of furnace wall linings and the furnace shell, and the middle parts of the sagger conveying rollers are positioned in the hearth; the upper heating rod and the lower heating rod are distributed at intervals along the length direction of the hearth, the upper heating rod and the lower heating rod are respectively positioned above and below the sagger conveying roller, two ends of the upper heating rod and the lower heating rod respectively penetrate through the pair of furnace wall linings and then extend out of the furnace shell, and the middle part of the upper heating rod and the lower heating rod is positioned in the hearth; protective gas introducing pipes which are distributed at intervals along the length direction of the hearth and are used for introducing protective gas into the hearth, wherein both ends of each protective gas introducing pipe also extend out of the furnace shell after respectively penetrating through the pair of furnace wall linings, and the middle part of each protective gas introducing pipe is positioned in the hearth; is characterized in that the flue comprises a flue gas up-leading section and a flue gas leading-out section, the flue gas up-leading section consists of a longitudinal smoke exhaust cavity and a transverse transition smoke exhaust cavity, the flue gas leading-out section consists of a flue gas longitudinal exhaust cavity and a smoke exhaust port, the lower end of the longitudinal smoke exhaust cavity is communicated with the upper part of the hearth, the upper end of the longitudinal smoke exhaust cavity is connected and communicated with one end of the transverse transition smoke exhaust cavity, the other end of the transverse transition smoke exhaust cavity is connected and communicated with one side of the middle part of the height direction of the flue gas longitudinal exhaust cavity, the lower part of the flue gas longitudinal exhaust cavity is a colloid storage cavity, the smoke exhaust port is formed at the top of the flue gas longitudinal exhaust cavity and extends out of the top surface of the furnace shell, and colloid generated by the condensation of the flue gas from the smoke exhaust port drips into the.
In a specific embodiment of the present invention, a lower flue, an air groove and a plurality of sets of lower air inlet holes are arranged on the furnace bottom lining at intervals, the lower flue is communicated with the furnace chamber, the air groove is communicated with the furnace chamber through an air gap groove formed on the furnace bottom lining, the plurality of sets of lower air inlet holes respectively correspond to the air groove, the upper portion of the lower air inlet holes is communicated with the air groove, the lower portion of the lower air inlet holes is communicated with a lower air inlet space, the lower air inlet space is communicated with the outside, lower air exhaust mechanisms with the same number as the lower flue are arranged at the bottom of the furnace bottom lining and at the position corresponding to the lower flue, the furnace bottom lining is in a state of being emptied on a floor by the lower air exhaust mechanisms, and the space between each two adjacent lower air exhaust mechanisms is formed into the.
In another specific embodiment of the present invention, the lower exhaust mechanism includes a lower exhaust flue, a lower exhaust flue left thermal insulation board, a lower exhaust flue right thermal insulation board, a lower exhaust flue casing, a lower exhaust flue channel connection port, and a lower exhaust flue support base, the lower exhaust flue is located below the furnace bottom lining and corresponds to the lower flue, the lower exhaust flue is surrounded by lower exhaust flue bricks which are matched up and down and left and right and is communicated with the lower exhaust flue, the lower exhaust flue left thermal insulation board is arranged between the lower exhaust flue casing and the left side of the lower exhaust flue bricks, the lower exhaust flue right thermal insulation board is arranged between the lower exhaust flue casing and the right side of the lower exhaust flue bricks, the lower exhaust flue support base is located between the lower part of the lower exhaust flue bricks and the bottom of the lower exhaust flue casing, the lower exhaust flue channel connection port corresponding to the lower exhaust flue is fixed with the lower exhaust flue casing and extends out of the exhaust flue casing, in a use state, the lower-row flue channel connecting port is connected with the flue gas leading-out pipeline, the space between the lower-row flue protecting shells of the two adjacent lower exhaust mechanisms is formed into the lower air inlet space, and one end of the lower-row flue, which is far away from the lower-row flue channel connecting port, is sealed by the lower-row flue interface cover plate.
In another specific embodiment of the invention, the furnace bottom lining is built by furnace bottom lining bricks, and the furnace bottom lining bricks and the lower-row flue bricks are alumina bubble bricks, high-alumina heat-insulating bricks, mullite heat-insulating bricks or light clay heat-insulating bricks.
In another specific embodiment of the present invention, the lower flue duct support foundation includes a lower flue duct support bottom brick and a waterproof plate, the lower flue duct support bottom brick is located below the waterproof plate and laid on the upward side of the bottom of the lower flue duct protective shell in a bricking manner, the waterproof plate is disposed on the upward side of the lower flue duct brick, and the lower flue duct, the lower flue duct left heat insulation plate and the lower flue duct right heat insulation plate are supported on the waterproof plate.
In another specific embodiment of the invention, the lower flue duct left heat insulation plate and the lower flue duct right heat insulation plate are aluminum silicate heat insulation plates.
In a more specific embodiment of the present invention, the pair of furnace wall linings each include an insulating stave wall and a brickwork wall, the insulating stave wall is formed by joining a plurality of furnace wall lining insulating plates to each other and is located between the brickwork wall and a longitudinal direction of a wall of a furnace chamber of the furnace shell, a bottom portion of the insulating stave wall is supported at an edge portion of the furnace bottom lining, the brickwork wall is formed by brickwork, a bottom portion of the brickwork wall is also supported at an edge portion of the furnace bottom lining, upper portions of the insulating stave wall and the brickwork wall extend upward, and both sides in the longitudinal direction of the furnace roof are simultaneously supported at upper portions of the insulating stave wall and the brickwork wall; the two ends of the upper heating rod, the lower heating rod and the protective gas inlet pipe are respectively supported on the heat preservation plate wall and the brickwork wall and extend out of one side of the furnace shell facing outwards; one end and the other end of the sagger conveying roller penetrate through the heat preservation plate wall and the bricklaying wall in a suspended state, extend out of the furnace shell and are rotatably supported on the outer wall of the furnace shell; the position of the protective gas inlet pipe in the hearth is positioned below the upper heating rod.
In a further specific embodiment of the present invention, the furnace wall lining insulation board is an aluminum silicate board; the brick walls are reserved with expansion joints at intervals in a longitudinal state, and high temperature resistant cotton is filled in the expansion joints and is rock wool, glass wool or aluminum silicate wool.
In yet another specific embodiment of the present invention, the upper heating rod is provided with an upper heating rod sheath tube, the lower heating rod is provided in a lower heating rod sheath tube, two ends of the upper heating rod sheath tube and the lower heating rod sheath tube sequentially penetrate through the brick wall and the insulation board wall, the middle part of the upper heating rod sheath tube and the lower heating rod sheath tube is located in the furnace chamber, two ends of the upper heating rod are respectively sleeved with an upper heating rod heat insulation sleeve, the upper heating rod heat insulation sleeve is matched with the tube cavity of the upper heating rod sheath tube, two ends of the lower heating rod are respectively sleeved with a lower heating rod heat insulation sleeve, and the lower heating rod heat insulation sleeve is matched with the tube cavity of the lower heating rod sheath tube.
In yet another specific embodiment of the present invention, gas injection holes of the introducing pipe for injecting the shielding gas into the furnace are opened at a spacing on a downward side of the middle of the shielding gas introducing pipe; the protective gas is nitrogen, hydrogen, nitrogen-hydrogen mixed gas or inert gas; the furnace shell is a carbon steel furnace shell; the flues are arranged on the furnace top and distributed at the positions corresponding to each temperature zone of the hearth at equal intervals from left to right, and temperature zone partition beams are respectively arranged in the furnace cavity and between each two adjacent temperature zones.
According to the technical scheme provided by the invention, the structure of the flue at the top of the furnace is designed to be composed of a flue gas up-leading section and a flue gas out-leading section, the flue gas out-leading section is composed of a flue gas longitudinal discharge cavity and a smoke exhaust port, and the lower part of the flue gas longitudinal discharge cavity is formed into a colloid storage cavity, so that colloid generated by condensation of flue gas at the smoke exhaust port can drip into the colloid storage cavity, and cannot drip into a furnace cavity or a saggar in a working state from the longitudinal smoke exhaust cavity to cause pollution to products; the cleaning of the hearth and the quality of products can be ensured; the colloid accumulated in the cavity storage cavity can be dug and cleaned conveniently when the furnace body is shut down regularly. In addition, because the waste flue gas of the heating section of the kiln is relatively more, a lower exhaust mechanism is creatively arranged at the bottom of the heating section of the kiln body, and the waste flue gas can be timely pumped away by connecting the lower exhaust mechanism to an exhaust chimney main pipeline of the kiln, so that the smoke exhaust effect of a hearth at the heating section is improved.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present invention.
Fig. 2 is a sectional view a-a of fig. 1.
Detailed Description
In order to clearly understand the technical spirit and the advantages of the present invention, the applicant below describes in detail by way of example, but the description of the example is not intended to limit the technical scope of the present invention, and any equivalent changes made according to the present inventive concept, which are merely in form and not in material, should be considered as the technical scope of the present invention.
In the following description, all the concepts related to the directions or orientations of up, down, left, right, front and back are taken as examples of the position state of fig. 1, and thus, the present invention should not be construed as being particularly limited to the technical solutions provided by the present invention.
Referring to fig. 1 and 2, a furnace shell 1 is shown, that is, the furnace shell 1 is shown as a structural system of the furnace body, and the furnace body is divided into a preheating section, a temperature rising section, a constant temperature section, a temperature lowering section, a cooling section and the like in the length direction and from the process perspective according to the common general knowledge, so that although the temperature rising section is mainly shown in fig. 1 and 2, the understanding of the whole furnace by those skilled in the art is not confused; a furnace bottom lining 2 is shown, the furnace bottom lining 2 is arranged at the bottom of the furnace shell cavity of the furnace shell 1 along the length direction of the furnace shell 1; a pair of furnace linings 3, each of which is provided along the longitudinal direction of the opposite side of the wall of the furnace shell cavity and is supported by the edge portion of the furnace bottom lining 2; a ceiling 4 provided in the furnace chamber at a position corresponding to a space between upper portions of the pair of furnace wall linings 3 in the longitudinal direction and fitted to the upper portions of the pair of furnace wall linings 3, a space defined by the ceiling 4, the bottom lining 2, and the pair of furnace wall linings 3 together constituting a furnace 5a, the furnace 5a penetrating from one end to the other end, for example, from the left end to the right end (a position state shown in fig. 1), and a flue 41 for exhausting flue gas generated in the furnace 5a to the furnace 5a being formed in the ceiling 4 at a position corresponding to each temperature zone in the longitudinal direction of the furnace 5 a; sagger conveyor rolls 5b are shown, which are distributed at intervals along the length direction of the furnace 5a, and both ends of the sagger conveyor rolls 5b are rotatably supported on the furnace shell 1 after passing through the pair of furnace wall linings 3 and the furnace shell 1, respectively, and the middle of the sagger conveyor rolls 5b is positioned in the furnace 5 a; upper and lower heating rods 5c and 5d are shown spaced apart along the length of the furnace 5a, the upper and lower heating rods 5c and 5d being located above and below the sagger conveyor rolls 5b, respectively, and having both ends protruding out of the furnace shell 1 after passing through the pair of furnace wall linings 3, respectively, and a middle portion located within the furnace 5 a; there are shown protective gas introduction pipes 5e for introducing a protective gas into the furnace chamber 5a, which are spaced apart along the length of the furnace chamber 5a, and which protective gas introduction pipes 5e likewise have both ends protruding out of the furnace shell 1 after passing through the pair of furnace wall linings 3, respectively, and a middle portion located inside the furnace chamber 5 a.
As can be seen from the schematic illustration of fig. 2, the stove top 4 shown in the present embodiment is a circular arch top, but it is not intended to be limited to a circular arch top, and for example, a flat top may be used instead with reasonable measures, and the term flat top refers to: the ceiling 4 acts like the ceiling of a building with respect to the furnace chamber 5 a. The advantages of flat top can make the furnace design wider and help to improve productivity.
From the above description of the furnace chamber 5a penetrating from one end to the other end, it can be determined without any problem that the left end of the furnace casing 1 in the temperature rising section shown in fig. 1 can be flange-fitted and fitted with a preheating section (not shown) in a building block effect, the material inlet is located at the left end of the preheating section, the sagger 7 shown in fig. 2 is made to carry materials such as lithium battery materials into the temperature rising section shown in fig. 1 of the present invention after being preheated by the preheating section, and then successively goes to the right into the above mentioned constant temperature section, cooling section and cooling section, and the sagger 7 is made to go out from the material outlet at the right end of the cooling section after being cooled. Different temperature zones are also provided at each stage, and the sintering temperatures of the different temperature zones are different. The applicant is not repeated here as the foregoing is essentially of the common general knowledge.
The technical key points of the technical scheme provided by the invention are as follows: the flue 41 comprises a flue gas up-leading section 411 and a flue gas out-leading section 412, the flue gas up-leading section 411 comprises a longitudinal smoke exhaust cavity 4111 and a transverse transition smoke exhaust cavity 4112, the flue gas out-leading section 412 comprises a flue gas longitudinal exhaust cavity 4121 and a smoke exhaust port 4122, the lower end of the longitudinal smoke exhaust cavity 4111 is communicated with the upper part of the hearth 5a, the upper end of the longitudinal smoke exhaust cavity 4111 is connected and communicated with one end of the transverse transition smoke exhaust cavity 4112, the other end of the transverse transition smoke exhaust cavity 4112 is connected and communicated with the middle side of the height direction of the flue gas longitudinal exhaust cavity 4121, the lower part of the flue gas longitudinal exhaust cavity 4121 is formed into a colloid storage cavity 41211, the smoke exhaust port 4122 is formed at the top of the flue gas longitudinal exhaust cavity 4121 and extends out of the top surface of the furnace shell 1, and colloid generated by the condensation of the flue gas from the smoke exhaust port 4122 flows down into the colloid storage cavity 41211. In this way the flue structure faithfully fulfills the technical effects described by the applicant in the technical effects column above. Furthermore, it should be understood that: the furnace top 4 of the whole furnace in the region from the preheating section to the cooling section, namely from the feeding hole to the discharging hole is provided with a flue 41 with the structure.
A lower flue 21, an air groove 22 and a plurality of sets of lower air inlet holes 23 are provided on the bottom lining 2 at intervals in the longitudinal direction of the bottom lining 2, the lower flue 21 communicates with the furnace 5a, the air groove 22 communicates with the furnace 5a through an air gap groove 24 formed on the bottom lining 2, the plurality of sets of lower air inlet holes 23 correspond to the air groove 22 respectively, the upper portion communicates with the air groove 22, the lower portion communicates with a lower air inlet space 5f, the lower air inlet space 5f communicates with the outside, lower air exhausting mechanisms 6 equal in number to the lower flue 21 are provided at the bottom of the bottom lining 2 and at positions corresponding to the lower flue 21, the bottom lining 2 is in a state of being evacuated to the floor by the lower air exhausting mechanisms 6, and the space between each two adjacent lower air exhausting mechanisms 6 is constituted as the lower air inlet space 5 f. The lower exhaust mechanism 6 is only arranged at the temperature rising section of the kiln, because the smoke quantity of the temperature rising section is large.
With respect to the warming section shown in fig. 1, the present embodiment shows five lower exhaust mechanisms 6, five lower flues 21, five air grooves 22 and five groups of lower air intake holes 23, and the number of each group of lower air intake holes 23 is four, but obviously should not be limited by the number shown in the figure, because if the number of temperature zones of the warming section is increased (five in the present embodiment), the number of the aforementioned structures is also increased correspondingly, and vice versa.
The lower exhaust mechanism 6 includes a lower exhaust flue 61, a lower exhaust flue left heat insulating plate 62, a lower exhaust flue right heat insulating plate 63, a lower exhaust flue casing 64, a lower exhaust flue passage connecting port 65, and a lower exhaust flue supporting base 66, the lower exhaust flue 61 is located below the furnace bottom lining 2 and corresponds to the lower exhaust flue 21, the lower exhaust flue 61 is enclosed by lower exhaust flue bricks 611 fitted up and down and left and right and communicates with the lower exhaust flue 21, the lower exhaust flue left heat insulating plate 62 is provided between the lower exhaust flue casing 64 and the left side of the lower exhaust flue bricks 611, the lower exhaust flue right heat insulating plate 63 is provided between the lower exhaust flue casing 64 and the right side of the lower exhaust flue bricks 611, the lower exhaust flue supporting base 66 is located between the lower portion of the lower exhaust flue bricks 611 and the bottom of the lower exhaust flue casing 64, the lower exhaust flue passage connecting port 65 is fixed to the lower exhaust flue casing 64 at a position corresponding to the lower exhaust flue exhaust port of the lower exhaust flue 61 and extends out, in a use state, the lower flue duct channel connecting port 65 is connected to a flue gas leading-out pipeline, more specifically, to a kiln exhaust chimney main pipeline to facilitate timely extraction of waste flue gas, a space between the lower flue duct protective shells 64 of two adjacent lower exhaust mechanisms 6 is configured as the lower air intake space 5f, and one end of the lower flue duct 61, which is far away from the lower flue duct channel connecting port 65, is closed by a lower flue duct connecting cover plate 67. As can be seen from the above description, the lower exhaust mechanism 6 is only arranged in the temperature rising section of the kiln.
Continuing with fig. 1 and 2, the furnace bottom lining 2 is constructed by the furnace bottom lining bricks, in this embodiment, the furnace bottom lining bricks and the lower flue bricks 611 are alumina bubble bricks, but if high alumina insulating bricks, mullite insulating bricks or light clay insulating bricks are used, they should be regarded as a proper technical means and still fall within the technical scope of the present disclosure.
The lower flue support base 66 includes lower flue support bottom bricks 661 and waterproof plates 662, the lower flue support bottom bricks 661 are located below the waterproof plates 662 and laid in a bricklaying manner, i.e., laid on the upward side of the bottom of the lower flue casing 64, the waterproof plates 622 are disposed on the upward side of the lower flue bricks 611, and the lower flue 61, the lower flue left insulating plate 62 and the lower flue right insulating plate 63 are supported on the waterproof plates 662.
In the present embodiment, the lower flue left heat insulation plate 62 and the lower flue right heat insulation plate 63 are aluminum silicate heat insulation plates. The lower flue casing 64 is a carbon steel casing.
Continuing to refer to fig. 1 and 2, each of the pair of furnace wall linings 3 includes a heat-insulating stave 31 and a bricklayed wall 32, the heat-insulating stave 31 is formed by combining a plurality of furnace wall lining heat-insulating plates and is located between the bricklayed wall 32 and the longitudinal direction of the wall of the furnace chamber of the furnace shell 1, the bottom of the heat-insulating wall 31 is supported on the edge of the hearth lining 2, the brick-laid wall 32 is formed by laying refractory bricks, the bottom of the brick-laid wall is supported on the edge portion of the furnace bottom lining 2, the insulating panel wall 31 and the upper portion of the brick-laid wall 32 extend upward, both sides in the longitudinal direction of the furnace roof 4 are supported on the upper portions of the insulating panel wall 31 and the brick-laid wall 32, that is, the furnace roof 4 is integrated with a pair of furnace wall linings 3, in the present embodiment, the furnace ceiling 4 is a dome ceiling and is constructed by bricks, and the flue 41 is constructed on the furnace ceiling 4 in the process of constructing the furnace ceiling 4 by bricks. If a ceiling-effect open-hearth furnace roof is used, as already mentioned above, the material of the furnace roof 4 is preferably light and it is reasonable to add a framework material, preferably made of alumina ceramic tubes. The aforementioned combination of the lightweight material such as the aluminum silicate lightweight fiberboard and the aluminum silicate fiberboard, the latter being disposed on the upper portion of the former, and the alumina ceramic tube being disposed inside the aluminum silicate lightweight fiberboard. The aforementioned flue 41 is constructed in a rational manner on a lightweight material.
Continuing to refer to fig. 1 and 2, the two ends of the upper heating rod 5c, the lower heating rod 5d and the shielding gas introducing pipe 5e are supported on the insulating board wall 31 and the brickwork wall 32 and extend out of the outward side of the furnace shell 1; one end and the other end of the sagger conveyor roller 5b penetrate through the insulation board wall 31 and the brick wall 32 in a suspended state, extend out of the furnace shell 1 and are rotatably supported on the outer wall of the furnace shell 1; the position of the shielding gas introducing pipe 5e in the furnace 5a is located below the upper heating rod 5 c.
In this embodiment, the furnace wall lining insulation board is an aluminum silicate board; an expansion joint 321 is reserved on the brickwork wall 32 at a longitudinal interval, and high temperature resistant cotton is filled in the expansion joint 321, and in this embodiment, the high temperature resistant cotton is rock wool, but glass wool or aluminum silicate wool may also be used.
The upper heating rod 5c is provided with an upper heating rod protecting pipe 5g, the lower heating rod 5d is provided in a lower heating rod protecting pipe 5h, two ends of the upper heating rod protecting pipe 5g and the lower heating rod protecting pipe 5h respectively penetrate through the brick wall 32 and the insulation board wall 31 in sequence, the middle part of the upper heating rod protecting pipe and the lower heating rod protecting pipe is positioned in the hearth 5a, two ends of the upper heating rod 5c are respectively sleeved with an upper heating rod heat insulating sleeve 5i, the upper heating rod heat insulating sleeves 5i are matched with the pipe cavity of the upper heating rod protecting pipe 5g, two ends of the lower heating rod 5d are respectively sleeved with a lower heating rod heat insulating sleeve 5j, and the lower heating rod heat insulating sleeves 5j are matched with the pipe cavity of the lower heating rod protecting pipe 5 h.
Preferably, heating rod supporting firebricks 5m each having a sheath tube abdicating hole are provided in the brick walls 32 at positions corresponding to both ends of the upper heating rod sheath tube 5g and the lower heating rod sheath tube 5h, and both ends of the upper heating rod sheath tube 5g and the lower heating rod sheath tube 5h are inserted through the holes in the heating rod supporting firebricks 5 m. Thermocouples 8 for detecting the temperature of the corresponding temperature zone in the furnace 5a are provided on the wall lining 3 on one side of the pair of wall linings 3 and at positions corresponding to the respective temperature zones.
As shown in fig. 2, an introducing pipe gas injection hole 5k for injecting the shielding gas into the furnace 5a is provided at a lower side of the middle portion of the shielding gas introducing pipe 5e at an interval; in this embodiment, since the sintered product is an aluminum nitride device or powder, the protective gas is nitrogen or a mixture of nitrogen and hydrogen, and according to the common general knowledge, hydrogen and an inert gas such as argon can be used according to different products and different process requirements. Even oxygen can be used as a reaction gas rather than a protective gas, for example, a positive electrode material of a sintered lithium battery, and oxygen can be used as a reaction gas to promote chemical reaction during sintering; conventional electronic powder and electronic devices generally use nitrogen as a protective gas, and the protective gas is hydrogen (reduction), and is generally used for metallization sintering of products, aluminum oxide, and sintering of electronic components. The furnace shell 1 is a carbon steel furnace shell.
Preferably, the aforementioned flues 41 are distributed on the aforementioned furnace roof 4 at equal intervals of left, middle and right at positions corresponding to the respective temperature zones of the furnace 5a, that is, with respect to one temperature zone (fig. 1 shows five temperature zones of the temperature raising zone), three flues may be provided at the top of the furnace roof 4 of each temperature zone in a distributed state of left, middle and right, where the left, middle and right are exemplified by the position state shown in fig. 2, and if the position state of fig. 1 is taken, it is referred to as front, middle and rear.
As shown in fig. 1, temperature zone partition beams 5L are respectively disposed in the furnace chamber 5a and between each two adjacent temperature zones.
Since the whole kiln, namely the whole working process or working principle of the novel atmosphere protection kiln belongs to the known technology, the applicant does not explain the whole kiln.
In conclusion, the technical scheme provided by the invention overcomes the defects in the prior art, successfully completes the invention task and truly realizes the technical effects of the applicant in the technical effect column.
Claims (10)
1. A novel atmosphere protection kiln comprises a furnace shell (1); the furnace bottom lining (2), the furnace bottom lining (2) is arranged at the bottom of a furnace shell cavity of the furnace shell (1) along the length direction of the furnace shell (1); a pair of furnace linings (3), wherein the pair of furnace linings (3) are respectively arranged along the length direction of one opposite side of the cavity wall of the furnace shell cavity and are respectively supported at the edge part of the furnace bottom lining (2); a ceiling (4) which is provided in the furnace shell cavity at a position corresponding to a position between upper portions of the pair of furnace wall linings (3) in the longitudinal direction and which is fitted to the upper portions of the pair of furnace wall linings (3), wherein a space which is defined by the ceiling (4), the hearth lining (2), and the pair of furnace wall linings (3) together is configured as a furnace chamber (5a), the furnace chamber (5a) penetrates from one end to the other end, and a flue (41) for discharging flue gas generated in the furnace chamber (5a) out of the furnace chamber (5a) is formed in the ceiling (4) at a position corresponding to each temperature zone in the longitudinal direction of the furnace chamber (5 a); sagger conveyor rollers (5b), the sagger conveyor rollers (5b) are distributed at intervals along the length direction of the hearth (5a), two ends of the sagger conveyor rollers (5b) respectively penetrate through the pair of furnace wall linings (3) and the furnace shell (1) and then are rotatably supported on the furnace shell (1), and the middle parts of the sagger conveyor rollers (5b) are positioned in the hearth (5 a); upper heating rods (5c) and lower heating rods (5d) are distributed at intervals along the length direction of the hearth (5a), the upper heating rods (5c) and the lower heating rods (5d) are respectively positioned above and below the sagger conveying rollers (5b), two ends of each heating rod protrude out of the furnace shell (1) after each heating rod penetrates through the pair of furnace wall linings (3), and the middle part of each heating rod is positioned in the hearth (5 a); protective gas introducing pipes (5e) which are distributed at intervals along the length direction of the hearth (5a) and are used for introducing protective gas into the hearth (5a), wherein two ends of each protective gas introducing pipe (5e) also extend out of the furnace shell (1) after respectively penetrating through the pair of furnace wall linings (3), and the middle part of each protective gas introducing pipe is positioned in the hearth (5 a); the furnace is characterized in that the flue (41) comprises a flue gas up-leading section (411) and a flue gas out-leading section (412), the flue gas up-leading section (411) consists of a longitudinal smoke exhaust cavity (4111) and a transverse transition smoke exhaust cavity (4112), the flue gas out-leading section (412) consists of a flue gas longitudinal exhaust cavity (4121) and a smoke exhaust port (4122), the lower end of the longitudinal smoke exhaust cavity (4111) is communicated with the upper part of the furnace chamber (5a), the upper end of the longitudinal smoke exhaust cavity (4111) is connected and communicated with one end of the transverse transition smoke exhaust cavity (4112), the other end of the transverse transition smoke exhaust cavity (4112) is connected and communicated with one side of the middle part of the height direction of the flue gas longitudinal exhaust cavity (4121), the lower part of the flue gas longitudinal exhaust cavity (4121) is a colloid storage cavity (41211), and the smoke exhaust port (4122) is formed at the top of the flue gas longitudinal exhaust cavity (4121) and extends out of the furnace shell top surface of the furnace shell (, the glue produced by the condensation of the fumes coming from the fume outlet (4122) drips into the glue storage chamber (41211).
2. The novel atmosphere protection kiln as claimed in claim 1, characterized in that a lower flue (21), an air groove (22) and a plurality of sets of lower air inlet holes (23) are arranged on the bottom lining (2) at intervals, the lower flue (21) is communicated with the hearth (5a), the air groove (22) is communicated with the hearth (5a) through an air vent groove (24) formed on the bottom lining (2), the plurality of sets of lower air inlet holes (23) are respectively corresponding to the air groove (22), the upper part is communicated with the air groove (22), the lower part is communicated with a lower air inlet space (5f), the lower air inlet space (5f) is communicated with the outside, lower air exhaust mechanisms (6) with the same number as the lower flue (21) are arranged at the bottom of the bottom lining (2) and at the position corresponding to the lower flue (21), the bottom lining (2) is in a state of being evacuated to the floor by the lower air exhaust mechanisms (6), and the space between every two adjacent lower exhaust mechanisms (6) is formed into the lower air inlet space (5 f).
3. The novel atmosphere protection kiln as claimed in claim 2, characterized in that the lower exhaust mechanism (6) comprises a lower exhaust flue (61), a lower exhaust flue left heat insulation board (62), a lower exhaust flue right heat insulation board (63), a lower exhaust flue protective shell (64), a lower exhaust flue channel connection port (65) and a lower exhaust flue support foundation (66), the lower exhaust flue (61) is located below the furnace bottom lining (2) and corresponds to the lower exhaust flue (21), the lower exhaust flue (61) is formed by enclosing lower exhaust flue bricks (611) which are matched up and down, left and right and is communicated with the lower exhaust flue (21), the lower exhaust flue left heat insulation board (62) is arranged between the lower exhaust flue protective shell (64) and the left side of the lower exhaust flue bricks (611), the lower exhaust flue right heat insulation board (63) is arranged between the lower exhaust flue protective shell (64) and the right side of the lower exhaust flue bricks (611), the lower-row flue supporting foundation (66) is positioned between the lower part of the lower-row flue brick (611) and the bottom of the lower-row flue protective shell (64), a lower-row flue channel connecting port (65) is fixed with the lower-row flue protective shell (64) at a position corresponding to a lower-row flue exhaust outlet of the lower-row flue (61) and extends out of the lower-row flue protective shell (64), the lower-row flue channel connecting port (65) is connected with a flue gas leading-out pipeline in a use state, the space between the lower-row flue protective shells (64) of every two adjacent lower exhaust mechanisms (6) is formed into a lower air inlet space (5f), and one end, far away from the lower-row flue channel connecting port (65), of the lower-row flue (61) is sealed by a lower-row flue interface cover plate (.
4. The novel atmosphere protection kiln as claimed in claim 3, characterized in that the bottom lining (2) is built by bottom lining bricks, and the bottom lining bricks and the lower flue bricks (611) are alumina bubble bricks, high alumina heat insulation bricks, mullite heat insulation bricks or light clay heat insulation bricks.
5. The novel atmosphere protection kiln according to claim 3, characterized in that the lower flue duct support foundation (66) comprises lower flue duct support bottom bricks (661) and waterproof boards (662), the lower flue duct support bottom bricks (661) are located below the waterproof boards (662) and laid in a bricklayed manner on the upward side of the bottom of the lower flue duct casing (64), the waterproof boards (622) are arranged on the upward side of the lower flue duct bricks (611), and the lower flue duct (61), the lower flue duct left heat insulation board (62) and the lower flue duct right heat insulation board (63) are supported on the waterproof boards (662).
6. A new type of atmosphere protection kiln as in claim 3 or 5, characterized by the fact that the lower flue duct left insulation board (62) and the lower flue duct right insulation board (63) are aluminum silicate insulation boards.
7. The novel atmosphere protection kiln according to claim 1, wherein the pair of furnace wall linings (3) each comprise an insulating stave wall (31) and a brickwork wall (32), the insulating stave wall (31) is formed by combining a plurality of furnace wall lining insulating plates with each other and is located between the brickwork wall (32) and a longitudinal direction of a wall of the furnace shell cavity of the furnace shell (1), a bottom portion of the insulating stave wall (31) is supported at an edge portion of the furnace bottom lining (2), the brickwork wall (32) is formed by brickwork, a bottom portion of the brickwork wall (32) is also supported at an edge portion of the furnace bottom lining (2), upper portions of the insulating stave wall (31) and the brickwork wall (32) extend upward, and both sides of the furnace top (4) in the longitudinal direction are simultaneously supported at upper portions of the insulating stave wall (31) and the brickwork wall (32); the two ends of the upper heating rod (5c), the lower heating rod (5d) and the protective gas inlet pipe (5e) are respectively supported on the heat preservation plate wall (31) and the bricklayed wall (32) and extend out of one side of the furnace shell (1) facing outwards; one end and the other end of the sagger conveying roller (5b) penetrate through the heat insulation plate wall (31) and the brick wall (32) in a suspended state, extend out of the furnace shell (1) and are rotatably supported on the outer wall of the furnace shell (1); the position of the protective gas introducing pipe (5e) in the hearth (5a) is located below the upper heating rod (5 c).
8. The novel atmosphere protection kiln as claimed in claim 7, wherein the wall lining insulation board is an aluminum silicate board; expansion joints (321) are reserved on the brick walls (32) at intervals in a longitudinal state, and high-temperature-resistant cotton is filled and embedded in the expansion joints (321) and is rock wool, glass wool or aluminum silicate wool.
9. A new type of atmosphere protection kiln as in claim 7, characterized in that the upper heating rod (5c) is arranged in an upper heating rod jacket tube (5g), the lower heating rod (5d) is arranged in a lower heating rod protecting pipe (5h), two ends of the upper heating rod protecting pipe (5g) and the lower heating rod protecting pipe (5h) respectively penetrate through the brickwork wall (32) and the insulation board wall (31) in sequence, the middle part of the upper heating rod protecting pipe and the lower heating rod protecting pipe are positioned in the hearth (5a), an upper heating rod heat insulation sleeve (5i) is respectively sleeved at the two ends of the upper heating rod (5c), the upper heating rod heat insulation sleeve (5i) is matched with the pipe cavity of the upper heating rod protective sleeve (5g), a lower heating rod heat insulation sleeve (5j) is respectively sleeved at the two ends of the lower heating rod (5d), the lower heating rod heat insulation sleeve (5j) is matched with the tube cavity of the lower heating rod protective sleeve (5 h).
10. The novel atmosphere protection kiln according to claim 1, characterized in that an introducing pipe gas orifice (5k) for spraying the shielding gas into the hearth (5a) is provided at a spacing state at one side of the shielding gas introducing pipe (5e) facing downward at the middle.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011064722.5A CN112229207A (en) | 2020-09-30 | 2020-09-30 | Novel atmosphere protection kiln |
| PCT/CN2020/134796 WO2022068053A1 (en) | 2020-09-30 | 2020-12-09 | New atmosphere protection kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011064722.5A CN112229207A (en) | 2020-09-30 | 2020-09-30 | Novel atmosphere protection kiln |
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| CN112229207A true CN112229207A (en) | 2021-01-15 |
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| CN202011064722.5A Pending CN112229207A (en) | 2020-09-30 | 2020-09-30 | Novel atmosphere protection kiln |
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| WO (1) | WO2022068053A1 (en) |
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| CN117683992A (en) * | 2024-02-01 | 2024-03-12 | 哈尔滨铭阳炉业有限公司 | Super-huge trolley type silicon carbide rod high-temperature heat treatment furnace adopting four-side heating |
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