CN113654350A - High-temperature pure hydrogen protective atmosphere boat pushing furnace equipment and process method thereof - Google Patents
High-temperature pure hydrogen protective atmosphere boat pushing furnace equipment and process method thereof Download PDFInfo
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- CN113654350A CN113654350A CN202110941629.6A CN202110941629A CN113654350A CN 113654350 A CN113654350 A CN 113654350A CN 202110941629 A CN202110941629 A CN 202110941629A CN 113654350 A CN113654350 A CN 113654350A
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
- F23G7/061—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating
- F23G7/063—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating electric heating
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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
- F27B9/06—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity heated without contact between combustion gases and charge; electrically heated
- F27B9/062—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity heated without contact between combustion gases and charge; electrically heated electrically heated
- F27B9/063—Resistor heating, e.g. with resistors also emitting IR rays
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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
- F27B9/12—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity with special arrangements for preheating or cooling the charge
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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
- 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
- F27B9/38—Arrangements of devices for charging
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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
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/18—Door frames; Doors, lids, removable covers
- F27D1/1858—Doors
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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
- F27D17/008—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases cleaning gases
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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
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/04—Ram or pusher apparatus
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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
- F27D5/00—Supports, screens, or the like for the charge within the 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
- F27B9/12—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity with special arrangements for preheating or cooling the charge
- F27B2009/124—Cooling
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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
- F27B9/38—Arrangements of devices for charging
- F27B2009/382—Charging
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27M—INDEXING SCHEME RELATING TO ASPECTS OF THE CHARGES OR FURNACES, KILNS, OVENS OR RETORTS
- F27M2003/00—Type of treatment of the charge
- F27M2003/04—Sintering
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Abstract
The invention discloses a high-temperature pure hydrogen protective atmosphere boat pushing furnace device and a process method thereof, which comprises a heating furnace communicated with pure hydrogen, wherein a furnace inlet box body is arranged at a furnace inlet port of the heating furnace, an inlet replacement chamber is arranged at an inlet of the furnace inlet box body, an inlet double gate is arranged between the inlet replacement chamber and the furnace inlet box body, an inlet single gate is arranged at an inlet of the inlet replacement chamber, a furnace outlet box body is arranged at a furnace outlet port of the heating furnace, an outlet replacement chamber is arranged at an outlet of the furnace outlet box body, an outlet double gate is arranged between the outlet replacement chamber and the furnace outlet box body, an outlet single gate is arranged at an outlet of the outlet replacement chamber, and through the replacement of gas in the inlet replacement chamber and the outlet replacement chamber, materials can be sintered in a hydrogen atmosphere, the isolation of the hydrogen in the heating furnace from outside air is ensured, and the explosion of the hydrogen leakage is prevented, the safety of the equipment is ensured.
Description
The technical field is as follows:
the invention relates to the technical field of boat pushing furnaces, in particular to high-temperature pure hydrogen protective atmosphere boat pushing furnace equipment and a process method thereof.
Background art:
in the nuclear industry field, in the process of sintering nuclear fuel, sintering is generally carried out at a temperature of over 1800 ℃ in a pure hydrogen environment, a traditional sintering furnace cannot bear a high temperature of over 1800 ℃, and meanwhile, inert gases such as nitrogen and the like are used as protective gases in the conventional sintering furnace, for example, a full-automatic nitrogen protection boat pushing furnace described in patent CN201410638849.1 comprises a pushing system, a feeding replacement chamber, a furnace body, a furnace tube, a cooling water tank, a discharging replacement chamber, a material boat and a control system; the furnace tube penetrates through the furnace body in the horizontal direction; the pushing system is arranged on the right side of the furnace body, a feeding replacement chamber is arranged between the pushing system and the furnace body, and the pushing system pushes the material boat into the furnace pipe through the feeding replacement chamber; the discharging replacement chamber is arranged at the left side of the furnace body, and a cooling water tank is arranged between the discharging replacement chamber and the furnace body; the push system is a hydraulic push system, and the push boat furnace only replaces nitrogen, cannot complete the replacement of pure hydrogen, and cannot be applied to the field of nuclear industry, so that high-temperature pure hydrogen protective atmosphere push boat furnace equipment which can resist high temperature and can replace hydrogen and air is required to be provided.
The invention content is as follows:
the invention aims to solve the existing problems and provides high-temperature pure hydrogen protective atmosphere boat pushing furnace equipment.
A high-temperature pure hydrogen protective atmosphere push boat furnace comprises a heating furnace which is communicated with pure hydrogen, wherein a furnace inlet box body is arranged at a furnace inlet port of the heating furnace, an inlet replacement chamber is arranged at an inlet of the furnace inlet box body, an inlet double gate is arranged between the inlet replacement chamber and the furnace inlet box body, an inlet single gate is arranged at an inlet of the inlet replacement chamber, an inlet secondary plate loading mechanism which pushes materials to the furnace inlet box body is arranged in the inlet replacement chamber, a main pushing mechanism which pushes the materials into a furnace chamber is arranged in the furnace inlet box body, a furnace outlet box body is arranged at a furnace outlet port of the heating furnace, an outlet replacement chamber is arranged at an outlet of the furnace outlet box body, an outlet double gate is arranged between the outlet replacement chamber and the furnace outlet box body, an outlet single gate is arranged at an outlet of the outlet replacement chamber, and an outlet primary plate unloading mechanism which pushes the materials to the outlet replacement chamber is arranged in the furnace outlet box body, the outlet replacement chamber is provided with an outlet secondary plate-descending mechanism for pushing the material to the outlet.
Preferably, the inlet double gate is close to one side of the inlet replacement chamber and one side of the inlet double gate close to the furnace inlet box body is provided with a first sealing element capable of realizing the inlet double gate and the inlet replacement chamber, the inlet double gate is connected with the furnace inlet box body in a sealing manner, and the inlet single gate is connected with the feed inlet of the inlet replacement chamber through a second sealing element capable of realizing the inlet single gate and the inlet replacement chamber in a sealing manner.
Preferably, the main pushing mechanism comprises a driving assembly and a push rod, an outer sleeve is sleeved on the push rod, a sealing ring is arranged between the outer sleeve and the push rod, the outer ring of the sealing ring is fixedly connected with the inner ring of the outer sleeve, and the sealing ring is movably connected with the push rod.
Preferably, the inlet of the inlet replacement chamber is provided with an inlet buffer mechanism capable of placing materials, the inlet buffer mechanism is provided with an inlet primary plate loading mechanism capable of pushing the materials into the inlet replacement chamber, and the outlet of the outlet replacement chamber is provided with an outlet buffer mechanism.
Preferably, the heating furnace is divided into a preheating temperature zone, a high temperature zone, a slow cooling temperature zone and a water cooling temperature zone in the direction from the hearth inlet to the hearth outlet.
Preferably, the heating furnace comprises a furnace shell, a bottom brick, a wall brick and a top brick, wherein the bottom brick, the wall brick and the top brick are spliced together to form a hearth, the hearth is formed by splicing special high-temperature-resistant corundum bricks, a heating element is arranged in the hearth and is a molybdenum wire heating body, and the molybdenum wire heating body is hung on the side wall of the hearth in a hook manner.
Preferably, a material support frame is formed at the bottom of the hearth, the material support frame is made of high-temperature-resistant special corundum brick materials, a groove is formed in the material support frame, an accommodating space for conveniently hanging a molybdenum wire heating body is formed between the material support frame and the side wall of the hearth, and the upper surface of the material support frame is higher than the bottom end of the molybdenum wire heating body.
Preferably, a heat insulation material is arranged between the hearth and the furnace shell, and the heat insulation temperature of the heat insulation material decreases gradually from the position close to the hearth to the position far away from the hearth.
A process method of a high-temperature pure hydrogen protective atmosphere boat pushing furnace is characterized by comprising the following steps:
(a) gas replacement of the high-temperature resistant heating furnace is carried out, the heating furnace (1) is ensured to be in a sealed environment, air in the heating furnace (1) is completely replaced by inert gas, and then the inert gas is completely replaced by hydrogen;
(b) the material is conveyed to the inlet replacement chamber (2) through the inlet primary plate loading mechanism (22) by primary pushing, the inlet single gate (9) is opened, the inlet replacement chamber (2) is closed through the inlet single gate (9), and the inlet replacement chamber (2) is ensured to be in a sealed state;
(c) the inlet replacement chamber is subjected to primary gas replacement, inert gas is introduced, and air in the inlet replacement chamber (2) is replaced, so that only inert gas exists in the inlet replacement chamber (2);
(d) secondary pushing, namely opening the inlet double gates (8), pushing the materials into the furnace inlet box body (6) through the inlet secondary plate loading mechanism (31), and then closing the inlet double gates (8);
(e) performing secondary gas replacement in the inlet replacement chamber, introducing inert gas when the material in the step (d) is pushed to the furnace inlet box body (6) and closed and then the inlet double gate (8) is closed and is in a sealed state, replacing hydrogen in the inlet replacement chamber (2) to ensure that only inert gas exists in the inlet replacement chamber (2), and then circularly repeating the steps (b) to (e);
(f) atmosphere sintering, namely pushing the materials which are conveyed to the furnace inlet box body (6) in each secondary conveying step in the step (d) into a high-temperature resistant heating furnace (1) through a main pushing mechanism (32) for sintering;
(g) pushing for the third time, namely pushing the sintered material to a furnace outlet box body (7);
(h) the outlet replacement chamber is subjected to primary gas replacement, inert gas is introduced to replace air in the outlet replacement chamber (4), and only inert gas is contained in the outlet replacement chamber (4);
(i) four times of pushing, namely opening an outlet double gate (91), pushing the material in the furnace outlet box body (7) to an outlet replacement chamber (4) through an outlet primary plate-descending mechanism (51), and closing the outlet double gate (91);
(j) secondary gas replacement of the outlet replacement chamber ensures that the outlet replacement chamber (4) is in a sealed space, and inert gas is introduced to replace hydrogen in the outlet replacement chamber (4) and ensure that the outlet replacement chamber (4) does not contain hydrogen;
(k) five times of pushing, namely opening an outlet single gate (92) of the outlet replacement chamber (4), pushing the materials out through an outlet secondary plate-descending mechanism (52), completing the sintering process of the products, and then circularly repeating the steps (h) to (j);
the invention has the beneficial effects that:
1. the invention relates to high-temperature pure hydrogen protective atmosphere boat pushing furnace equipment which comprises a heating furnace communicated with pure hydrogen, wherein a furnace inlet box body is arranged at a furnace inlet port of the heating furnace, an inlet replacement chamber is arranged at an inlet of the furnace inlet box body, an inlet double gate is arranged between the inlet replacement chamber and the furnace inlet box body, an inlet single gate is arranged at an inlet of the inlet replacement chamber, an inlet secondary plate loading mechanism for pushing materials to the furnace inlet box body is arranged in the inlet replacement chamber, a main pushing mechanism for pushing the materials into a furnace chamber is arranged in the furnace inlet box body, a furnace outlet box body is arranged at a furnace outlet port of the heating furnace, an outlet replacement chamber is arranged at an outlet of the furnace outlet box body, an outlet double gate is arranged between the outlet replacement chamber and the furnace outlet box body, an outlet single gate is arranged at an outlet of the outlet replacement chamber, and an outlet primary plate loading mechanism for pushing the materials to the outlet replacement is arranged in the furnace outlet box body, the outlet replacement chamber is provided with an outlet secondary plate lowering mechanism for pushing the material to an outlet, when in use, the material is sent to the inlet replacement chamber, then the inlet replacement chamber is closed through an inlet single gate, inert gas is introduced into the inlet replacement chamber to replace the air in the inlet replacement chamber, after the air in the inlet replacement chamber is ensured to be absent, the inlet double gates are opened, the material is pushed into the heating furnace for atmosphere sintering, the sintered material is pushed to the furnace outlet box body, meanwhile, the inert gas is introduced into the outlet replacement chamber to replace the air in the outlet replacement chamber, so that only the inert gas is present in the outlet replacement chamber, then the outlet double gates are opened, the sintered material is sent to the outlet replacement chamber through the outlet primary plate lowering mechanism, then the outlet replacement chamber is sealed, hydrogen is replaced into the inert gas, and then the material is sent out, through the replacement of the gas in the inlet replacement chamber and the outlet replacement chamber, the material can be sintered in the hydrogen, the hydrogen in the heating furnace is isolated from the outside air, the hydrogen is prevented from leaking and exploding, and the safety of the equipment is ensured.
2. According to the invention, one side of the inlet double gate close to the inlet replacement chamber and one side of the inlet double gate close to the furnace inlet box body are respectively provided with a first sealing element capable of realizing the inlet double gate and the inlet replacement chamber, the inlet double gate is in sealing connection with the furnace inlet box body, one side of the inlet single gate connected with the feed inlet of the inlet replacement chamber is provided with a second sealing element capable of realizing the inlet single gate in sealing connection with the inlet replacement chamber, and the second sealing element arranged on the inlet single gate can ensure the sealing performance of the inlet and the outlet of the inlet replacement chamber through the first sealing element arranged on the inlet double gate, so that the problem of explosion caused by hydrogen leakage in the gas replacement process is prevented, and the safety performance of equipment is improved.
3. The high-temperature-resistant heating furnace comprises a furnace shell, a furnace bottom brick, a furnace wall brick and a furnace top brick, wherein a space formed by jointly splicing the furnace bottom brick, the furnace wall brick and the furnace top brick is formed into a hearth, the hearth is formed by splicing high-temperature-resistant special corundum bricks, a heating element is arranged in the hearth and is a molybdenum wire heating body, the molybdenum wire heating body is hung on the side wall of the hearth in a hook manner, the temperature in the hearth can be ensured to be higher than 1800 ℃ through the molybdenum wire heating body, the hearth can bear the high temperature higher than 1800 ℃ through the high-temperature-resistant special corundum bricks, the product can be sintered in the environment of 1800 ℃, and the quality of the product is ensured.
4. The bottom of the hearth is formed with a material support frame, the material support frame is made of high-temperature-resistant special corundum brick materials, a groove is formed in the material support frame, a molybdenum wire heating body accommodating space convenient to hang is formed between the material support frame and the side wall of the hearth, the upper surface of the material support frame is higher than the bottom end of the molybdenum wire heating body, when the material support frame is used, a product is placed in the groove, the molybdenum wire heating body located in the accommodating space starts to be heated, and the material located in the groove in the upper surface of the material support frame can be uniformly heated due to the fact that the upper surface of the material support frame is higher than the bottom end of the molybdenum wire heating body and heat rises from bottom to top.
Description of the drawings:
FIG. 1 is an overall schematic view of the present invention;
FIG. 2 is a schematic cross-sectional view of a furnace according to the present invention;
FIG. 3 is a schematic view of a putter of the present invention;
FIG. 4 is a schematic representation of the process of the present invention;
in the drawings: 1. heating furnace; 31. a preheating temperature zone; 32. a high temperature zone; 33. a slow cooling area; 34. a water cooling temperature zone; 2. an inlet replacement chamber; 21. an entry caching mechanism; 22. an inlet primary plate feeding mechanism; 31. an inlet secondary plate feeding mechanism; 32. a main pushing mechanism; 4. an outlet replacement chamber; 41. an egress cache mechanism; 51. an outlet primary plate-descending mechanism; 52. an outlet secondary plate-lowering mechanism; 7. a furnace outlet box body; 6. a furnace inlet box body; 61. an exhaust gas combustion system; 8. an inlet double gate; 9. an inlet single gate; 91. an outlet double gate; 92. an outlet single gate; 11. a furnace shell; 111. a housing chassis; 12. a hearth brick; 13. furnace wall bricks; 14. a furnace roof brick; 15. a hearth; 151. a thermocouple; 16. high temperature resistant special-shaped special corundum bricks; 161. a thermal insulation material; 17. a molybdenum wire heating element; 18. placing a material rack; 181. a groove; 19. an accommodating space;
the specific implementation mode is as follows:
the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
In the present invention, unless otherwise expressly specified or limited, the terms "disposed," "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected or detachably connected; may be a mechanical connection; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
As shown in fig. 1-4, a high temperature pure hydrogen protective atmosphere pusher furnace apparatus comprises a heating furnace 1 through which pure hydrogen is introduced, a furnace inlet box 6 is arranged at a furnace inlet port of the heating furnace 1, an inlet replacement chamber 2 is arranged at an inlet of the furnace inlet box 6, an inlet double gate 8 is arranged between the inlet replacement chamber 2 and the furnace inlet box 6, an inlet single gate 9 is arranged at an inlet of the inlet replacement chamber 2, an inlet secondary plate loading mechanism 31 for pushing a material to the furnace inlet box is arranged at the inlet replacement chamber 2, a main pushing mechanism 32 for pushing the material to a furnace chamber is arranged at the furnace inlet box 6, a furnace outlet box 7 is arranged at a furnace outlet port of the heating furnace 1, an outlet replacement chamber 4 is arranged at an outlet of the furnace outlet box 7, an outlet double gate 91 is arranged between the outlet replacement chamber 4 and the furnace outlet box 7, an outlet single gate 92 is arranged at an outlet of the outlet replacement chamber 4, the furnace outlet box body 7 is provided with an outlet primary plate-descending mechanism 51 for pushing the material to the outlet replacement chamber 4, and the outlet replacement chamber 4 is provided with an outlet secondary plate-descending mechanism 52 for pushing the material to the outlet.
Specifically, entry double gate 8 is close to one side of entry replacement room 2 and entry double gate 8 is close to one side of stove entry box 6 all is equipped with and can realize entry double gate 8 and entry replacement room 2, entry double gate 8 with stove entry box 6 sealing connection's first sealing member, first sealing member can be the sealing washer, entry single gate 9 with one side that the feed inlet of entry replacement room 2 is connected is equipped with and can realize entry single gate 9 and entry replacement room 2 sealing connection's second sealing member, the second sealing member can be the sealing washer.
The outlet double gate 91 has the same structure as the inlet double gate 8, and the outlet single gate 92 has the same structure as the inlet double gate 8.
Specifically, the main pushing mechanism 32 includes a driving assembly and a push rod 321, the driving assembly may be a hydraulic cylinder, which is not described in detail in the present application, an outer sleeve 322 is sleeved on the push rod 321, a sealing ring 323 is disposed between the outer sleeve 322 and the push rod 321, an outer ring of the sealing ring 323 is fixedly connected to an inner ring of the outer sleeve 322, the sealing ring 323 is movably connected to the push rod 321, when the main pushing mechanism 32 is used, the outer sleeve 322 is fixedly connected to the right side of the furnace inlet box 6, the push rod 321 shuttles in the furnace inlet box 6, dynamic sealing is achieved through the sealing ring 323, hydrogen cannot leak in the pushing process of the push rod 321 of the main pushing mechanism 32, and safety performance of the device is improved.
The sealing structure of the inlet secondary plate loading mechanism 31, the outlet primary plate unloading mechanism 51 and the outlet secondary plate unloading mechanism 52 is the same as that of the main pushing mechanism 32.
Specifically, the inlet of the inlet replacement chamber 2 is provided with an inlet cache mechanism 21 capable of placing materials, the inlet cache mechanism 21 is provided with an inlet primary plate feeding mechanism 22 capable of pushing the materials into the inlet replacement chamber 2, the primary plate feeding mechanism 22 can be a push rod mechanism, and the prior art is not repeated in the present case, the outlet of the outlet replacement chamber 4 is provided with an outlet cache mechanism 41, the inlet cache mechanism 21 and the outlet cache mechanism 41 both comprise a transmission table, the materials are placed on the transmission table, the transmission table can be roller transmission, and through the inlet cache mechanism 21, the inlet primary plate feeding mechanism 22 can achieve automatic feeding, manual work is not needed, labor productivity is improved, and automatic discharging can be achieved through the outlet cache mechanism 41.
Specifically, the heating furnace 1 is divided into a preheating temperature zone 31, a high temperature zone 32, a slow cooling temperature zone 33 and a water cooling temperature zone 34 in the direction from the hearth inlet to the hearth outlet, the preheating temperature zone 31 and the high temperature zone 32 are heating processes, the slow cooling temperature zone 33 is a natural cooling process, and the water cooling temperature zone 34 is further cooled by water.
Specifically, the high temperature resistant heating furnace 1 comprises a furnace shell 11, a furnace bottom brick 12, a furnace wall brick 13 and a furnace top brick 14, wherein a space formed by splicing the furnace bottom brick 12, the furnace wall brick 13 and the furnace top brick 14 is a hearth 15, the hearth 15 is spliced by adopting a high temperature resistant special corundum brick 16, the high temperature resistant special corundum brick 16 is the prior art, in the patent with the patent application number of CN201911220736.9, the characteristics of the brick are disclosed, the high temperature resistant special corundum brick 16 can bear the high temperature of more than 1800 ℃, the high temperature resistant temperature of the hearth 15 reaches more than 1800 ℃, a heating element is arranged in the hearth 15, the temperature in the hearth can be added to more than 1800 ℃ through a molybdenum wire heating element, the hearth can bear the high temperature of more than 1800 ℃ through adopting the high temperature resistant special corundum brick, and the product can be sintered in the environment of more than 1800 ℃, the quality of the product is ensured.
Specifically, the heating element is a molybdenum wire heating element 17, the molybdenum wire heating element 17 is hung on the side wall of the hearth 15 in a hook type, and the molybdenum wire heating element 17 is easy to soften when being heated, so that the problem that the molybdenum wire heating element 17 becomes soft can be solved by adopting a hanging mode, and heating is prevented from being influenced by softening.
Specifically, a material supporting frame 18 is formed at the bottom of the hearth 15, the material supporting frame 18 is made of a high-temperature-resistant special corundum brick material, the temperature of over 1800 ℃ can be guaranteed, and a groove 181 is formed in the material supporting frame 18, so that materials can be placed conveniently.
Specifically, an accommodating space 19 for conveniently hanging a molybdenum wire heating body 17 is formed between the material support frame 18 and the side wall of the hearth 15, the upper surface of the material support frame 18 is higher than the bottom end of the molybdenum wire heating body 17, the molybdenum wire heating body 17 located in the accommodating space 19 starts to heat, and the material located in a groove on the upper surface of the material support frame 18 can be uniformly heated because the upper surface of the material support frame 18 is higher than the bottom end of the molybdenum wire heating body 17 and the heat rises from bottom to top.
Specifically, a heat insulation material 161 is arranged between the hearth 15 and the furnace shell 11, the heat insulation temperature of the heat insulation material 161 decreases gradually from the position close to the hearth 15 to the position far away from the hearth 15, and the heat insulation material is built by high, medium and low heat insulation bricks, so that the heat insulation effect is ensured, and the cost is reduced.
Specifically, the thermocouple 151 is installed on the side wall of the furnace chamber 15, and can detect the temperature in the heating furnace and control the temperature in the furnace, which is not described in detail in the present application.
In particular, the furnace shell 1 is supported in the use state on a furnace shell base frame 111.
Specifically, the furnace shell 11 is welded in a sealing manner, so that hydrogen leakage is prevented, and the use safety is ensured.
Specifically, the equipment is further provided with a waste gas combustion device 61, hydrogen and air in the furnace and the replacement chamber are replaced by inert gas through the waste gas combustion device 61, the hydrogen and the air are uniformly introduced into a waste gas combustion system for combustion, the waste gas combustion device 61 comprises a waste gas inlet, the waste gas inlet is connected with the replacement chamber and a gas outlet of the heating furnace, the waste gas inlet is connected with an electric heating element through a pipeline, and waste gas is combusted through temperature control heating.
Specifically, a hydrogen explosion venting device is arranged at the outlet box of the furnace body, so that the overall safety performance is improved.
Specifically, the heating furnace 1 is provided with an air inlet and an air outlet, when the heating furnace is used, inert gas is introduced into the furnace to displace air inside, and after the furnace is filled with the inert gas, reducing gas hydrogen is introduced into the furnace to displace the inert gas, so that the product can be sintered in a pure hydrogen environment.
Specifically, the control system is a control system provided with a PLC, so that the full-automatic control of the invention can be realized.
The working principle is as follows: when the molybdenum wire heating device is used, materials are pushed to the groove 181 in the hearth 15, inert gas is introduced to replace air in the hearth, reducing gas hydrogen is filled into the hearth after the hearth is filled with the inert gas, the inert gas is replaced, the molybdenum wire heating body is heated, and the product can be sintered in a pure hydrogen environment.
A process method of high-temperature pure hydrogen protective atmosphere boat pushing furnace equipment,
(a) gas replacement of the high-temperature-resistant heating furnace is carried out, the high-temperature-resistant heating furnace (1) is ensured to be in a sealed environment, air in the high-temperature-resistant heating furnace (1) is completely replaced by inert gas, and then the inert gas is completely replaced by hydrogen;
(b) the material is conveyed to the inlet replacement chamber (2) through the inlet primary plate loading mechanism (22) by primary pushing, the inlet single gate (9) is opened, the inlet replacement chamber (2) is closed through the inlet single gate (9), and the inlet replacement chamber (2) is ensured to be in a sealed state;
(c) the inlet replacement chamber is subjected to primary gas replacement, inert gas is introduced, and air in the inlet replacement chamber (2) is replaced, so that only inert gas exists in the inlet replacement chamber (2);
(d) secondary pushing, namely opening the inlet double gates (8), pushing the materials into the furnace inlet box body (6) through the inlet secondary plate loading mechanism (31), and then closing the inlet double gates (8);
(e) performing secondary gas replacement in the inlet replacement chamber, introducing inert gas when the material in the step (d) is pushed to the furnace inlet box body (6) and closed and then the inlet double gate (8) is closed and is in a sealed state, replacing hydrogen in the inlet replacement chamber (2) to ensure that only inert gas exists in the inlet replacement chamber (2), and then circularly repeating the steps (b) to (e);
(f) atmosphere sintering, namely pushing the materials which are conveyed to the furnace inlet box body (6) in each secondary conveying step in the step (d) into a high-temperature resistant heating furnace (1) through a main pushing mechanism (32) for sintering;
(g) pushing for the third time, namely pushing the sintered material to a furnace outlet box body (7);
(h) the outlet replacement chamber is subjected to primary gas replacement, inert gas is introduced to replace air in the outlet replacement chamber (4), and only inert gas is contained in the outlet replacement chamber (4);
(i) four times of pushing, namely opening an outlet double gate (91), pushing the material in the furnace outlet box body (7) to an outlet replacement chamber (4) through an outlet primary plate-descending mechanism (51), and closing the outlet double gate (91);
(j) secondary gas replacement of the outlet replacement chamber ensures that the outlet replacement chamber (4) is in a sealed space, and inert gas is introduced to replace hydrogen in the outlet replacement chamber (4) and ensure that the outlet replacement chamber (4) does not contain hydrogen;
(k) five times of pushing, namely opening an outlet single gate (92) of the outlet replacement chamber (4), pushing the materials out through an outlet secondary plate-descending mechanism (52), completing the sintering process of the products, and then circularly repeating the steps (h) to (j);
the above description is only a preferred embodiment of the present invention, and all other embodiments obtained by those skilled in the art without any inventive work shall fall within the scope of the present invention.
Claims (10)
1. The utility model provides a high temperature pure hydrogen protective atmosphere pushes away boat stove equipment which characterized in that: comprises a heating furnace (1) communicated with pure hydrogen, wherein a furnace inlet box body (6) is arranged at a furnace inlet port of the heating furnace (1), an inlet replacement chamber (2) is arranged at an inlet of the furnace inlet box body (6), an inlet double gate (8) is arranged between the inlet replacement chamber (2) and the furnace inlet box body (6), an inlet single gate (9) is arranged at an inlet of the inlet replacement chamber (2), the inlet replacement chamber (2) is provided with an inlet secondary plate feeding mechanism (31) for pushing materials to the furnace inlet box body, the furnace inlet box body (6) is provided with a main pushing mechanism (32) for pushing the materials to a furnace chamber, a furnace outlet box body (7) is arranged at a furnace outlet port of the heating furnace (1), an outlet replacement chamber (4) is arranged at an outlet of the furnace outlet box body (7), and an outlet double gate (91) is arranged between the outlet replacement chamber (4) and the furnace outlet box body (7), an outlet single gate (92) is arranged at an outlet of the outlet replacement chamber (4), an outlet primary plate-descending mechanism (51) for pushing the material to the outlet replacement chamber (4) is arranged on the furnace outlet box body (7), and an outlet secondary plate-descending mechanism (52) for pushing the material to the outlet is arranged on the outlet replacement chamber (4).
2. The high-temperature pure hydrogen protective atmosphere pusher furnace equipment according to claim 1, characterized in that: entry double gate (8) are close to one side of entry replacement room (2) and entry double gate (8) are close to one side of stove entry box (6) all is equipped with and can realizes entry double gate (8) and entry replacement room (2), entry double gate (8) with stove entry box (6) sealing connection's first sealing member, entry single gate (9) with one side that the feed inlet of entry replacement room (2) is connected is equipped with and can realizes entry single gate (9) and entry replacement room (2) sealing connection's second sealing member.
3. The high-temperature pure hydrogen protective atmosphere pusher furnace equipment according to claim 1, characterized in that: main push mechanism (32) including drive assembly and push rod (321), the cover is equipped with overcoat (322) on push rod (321), overcoat (322) with be equipped with between push rod (321) sealing washer (323), the outer lane of sealing washer (323) with the inner circle fixed connection of overcoat (322), sealing washer (323) with push rod (321) swing joint.
4. The high-temperature pure hydrogen protective atmosphere pusher furnace according to claim 1, characterized in that: the import of entry replacement room (2) is equipped with entry buffer memory mechanism (21) that can place the material, entry buffer memory mechanism (21) are equipped with and once go up board mechanism (22) with the entry that material propelling movement to entry replacement room (2) is interior, the export of export replacement room (4) is equipped with export buffer memory mechanism (41).
5. The high-temperature pure hydrogen protective atmosphere pusher furnace equipment according to claim 1, characterized in that: the heating furnace (1) is divided into a preheating temperature zone (31), a high-temperature zone (32), a slow cooling temperature zone (33) and a water cooling temperature zone (34) in the direction from the hearth inlet to the hearth outlet.
6. The high-temperature pure hydrogen protective atmosphere pusher furnace equipment according to claim 1, characterized in that: the heating furnace (1) comprises a furnace shell (11), furnace bottom bricks (12), furnace wall bricks (13) and furnace top bricks (14), wherein the furnace bottom bricks (12), the space formed by splicing the furnace wall bricks (13) and the furnace top bricks (14) together form a hearth (15), the hearth (15) is formed by splicing special high-temperature-resistant corundum bricks (16), heating elements are arranged in the hearth (15), the heating elements are molybdenum wire heating bodies (17), and the molybdenum wire heating bodies (17) are hung on the side wall of the hearth (15) through a hook type.
7. The high-temperature pure hydrogen protective atmosphere pusher furnace equipment according to claim 6, wherein: the bottom of the hearth (15) is formed with a material support frame (18), the material support frame (18) is made of high-temperature-resistant special corundum brick materials, a groove (181) is formed in the material support frame (18), an accommodating space (19) convenient for hanging a molybdenum wire heating body (17) is formed between the material support frame (18) and the side wall of the hearth (15), and the upper surface of the material support frame (18) is higher than the bottom end of the molybdenum wire heating body (17).
8. The high-temperature pure hydrogen protective atmosphere pusher furnace equipment according to claim 6, wherein: and a heat insulation material (161) is arranged between the hearth (15) and the furnace shell (11), and the heat insulation temperature of the heat insulation material (161) is gradually decreased from the position close to the hearth (15) to the position far away from the hearth (15).
9. The high-temperature pure hydrogen protective atmosphere pusher furnace equipment according to claim 1, characterized in that: still be provided with exhaust gas combustion device (61), exhaust gas combustion device (61) is including the waste gas air inlet, the waste gas air inlet with replace the room, the gas outlet of heating furnace is connected, the waste gas air inlet has electric heating element through the pipe connection.
10. A process method of high-temperature pure hydrogen protective atmosphere boat pushing furnace equipment is characterized by comprising the following steps:
(a) replacing gas in the heating furnace, ensuring that the high-temperature resistant heating furnace (1) is in a sealed environment, completely replacing air in the high-temperature resistant heating furnace (1) with inert gas, and then completely replacing the inert gas with hydrogen;
(b) the material is conveyed to the inlet replacement chamber (2) through the inlet primary plate loading mechanism (22) by primary pushing, the inlet single gate (9) is opened, the inlet replacement chamber (2) is closed through the inlet single gate (9), and the inlet replacement chamber (2) is ensured to be in a sealed state;
(c) the inlet replacement chamber is subjected to primary gas replacement, inert gas is introduced, and air in the inlet replacement chamber (2) is replaced, so that only inert gas exists in the inlet replacement chamber (2);
(d) secondary pushing, namely opening the inlet double gates (8), pushing the materials into the furnace inlet box body (6) through the inlet secondary plate loading mechanism (31), and then closing the inlet double gates (8);
(e) performing secondary gas replacement in the inlet replacement chamber, introducing inert gas when the material in the step (d) is pushed to the furnace inlet box body (6) and closed and then the inlet double gate (8) is closed and is in a sealed state, replacing hydrogen in the inlet replacement chamber (2) to ensure that only inert gas exists in the inlet replacement chamber (2), and then circularly repeating the steps (b) to (e);
(f) atmosphere sintering, namely pushing the materials which are conveyed to the furnace inlet box body (6) in each secondary conveying step in the step (d) into a high-temperature resistant heating furnace (1) through a main pushing mechanism (32) for sintering;
(g) pushing for the third time, namely pushing the sintered material to a furnace outlet box body (7);
(h) the outlet replacement chamber is subjected to primary gas replacement, inert gas is introduced to replace air in the outlet replacement chamber (4), and only inert gas is contained in the outlet replacement chamber (4);
(i) four times of pushing, namely opening an outlet double gate (91), pushing the material in the furnace outlet box body (7) to an outlet replacement chamber (4) through an outlet primary plate-descending mechanism (51), and closing the outlet double gate (91);
(j) secondary gas replacement is carried out in the outlet replacement chamber, the outlet replacement chamber (4) is ensured to be in a sealed space, the inert gas is introduced to replace the hydrogen in the outlet replacement chamber (4), and the outlet replacement chamber (4) is ensured to be free of hydrogen;
(k) and (5) five times of pushing, namely opening an outlet single gate (92) of the outlet replacement chamber (4), pushing the material out through an outlet secondary plate-descending mechanism (52), completing the sintering process of the product, and then circularly repeating the steps (h) to (j).
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| CN115265180A (en) * | 2022-08-02 | 2022-11-01 | 浙江科奥陶业有限公司 | High-temperature pure hydrogen protective atmosphere boat pushing furnace equipment |
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