CN115650605A - Double-chamber limekiln fire drawing hole structure and preparation method - Google Patents
Double-chamber limekiln fire drawing hole structure and preparation method Download PDFInfo
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- CN115650605A CN115650605A CN202211393958.2A CN202211393958A CN115650605A CN 115650605 A CN115650605 A CN 115650605A CN 202211393958 A CN202211393958 A CN 202211393958A CN 115650605 A CN115650605 A CN 115650605A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P40/40—Production or processing of lime, e.g. limestone regeneration of lime in pulp and sugar mills
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Abstract
The embodiment of the invention provides a double-hearth limekiln fire drawing hole structure and a preparation method thereof, relating to the field of fire drawing hole structures. This fire hole structure is pulled out to two thorax limekilns includes the seal receptacle, mullite pouring material inner tube, interior gland, the connecting pipe, support sealing member and ripple compensator, interior gland sets up in the top of mullite pouring material inner tube, interior gland is equipped with the cavity, the cavity is used for setting up the filler, the top of connecting pipe is connected with the bottom of interior gland, mullite pouring material inner tube is stretched into to the bottom of connecting pipe, support sealing member sets up in the bottom of connecting pipe, and the inner wall butt of the edge of support sealing member and mullite pouring material inner tube is in order to form sealedly, the outside of interior gland is located to ripple compensator cover, the top and the seal receptacle of ripple compensator are connected, the bottom and the mullite pouring material inner tube of ripple compensator are connected. The mullite castable inner barrel can bear high temperature, and the problem that the fire pulling holes are easy to deform after being baked at high temperature is solved.
Description
Technical Field
The invention relates to the field of fire drawing hole structures, in particular to a double-hearth limekiln fire drawing hole structure and a preparation method thereof.
Background
The double-chamber lime kiln is a mainstream lime kiln type which is widely applied in active lime production in the domestic metallurgy and chemical industry at present, and is based on the heat storage and parallel flow calcination process characteristics of the double-chamber lime kiln, annular channels are arranged below the calcination belts of the two chambers and are connected with the annular channels of the two chambers through direct-connection channels, and in the production process, flue gas in the lime kiln enters the annular channel of the other chamber from the annular channel of one chamber. The fire drawing holes are arranged above the annular channel of each kiln chamber, and the fire drawing holes are mainly used for checking and cleaning the channel.
Because the hole of drawing a fire sets up in kiln thorax annular passage top, draws a fire the hole and need bear high temperature, consequently draw a fire the hole and exist the steel inner tube and warp easily and lead to its peripheral refractory material fracture and then cause the peripheral blowby gas of hole of drawing a fire to form the problem of thermal runaway among the prior art.
Disclosure of Invention
The invention provides a double-hearth limekiln fire drawing hole structure and a preparation method thereof, which can relieve the problem that refractory materials at the periphery of a fire drawing hole crack because an inner steel cylinder is easy to deform, avoid the occurrence of gas channeling at the periphery of the fire drawing hole and thermal runaway, and reduce potential safety hazards.
Embodiments of the invention may be implemented as follows:
the embodiment of the invention provides a double-hearth limekiln fire pulling hole structure, which comprises:
a sealing seat;
an inner barrel of mullite castable;
the inner gland is arranged at the top of the mullite castable inner barrel and provided with a cavity, and the cavity is used for arranging a filling piece;
the top end of the connecting pipe is connected with the bottom of the inner gland, and the bottom end of the connecting pipe extends into the mullite castable inner cylinder;
the supporting sealing piece is arranged at the bottom end of the connecting pipe, and the edge of the supporting sealing piece is abutted with the inner wall of the mullite castable inner barrel to form a seal; and
the corrugated compensator is sleeved outside the inner gland, the top end of the corrugated compensator is connected with the sealing seat, the bottom end of the corrugated compensator is connected with the mullite castable inner barrel, and the corrugated compensator is used for forming a sealing structure between the sealing seat and the mullite castable inner barrel.
Optionally, the corrugated compensator comprises a corrugated sleeve and a reinforcing sleeve, the reinforcing sleeve is connected with the bottom of the corrugated sleeve, and the reinforcing sleeve is fixedly connected with the top of the mullite castable inner barrel.
Optionally, the mullite castable inner cylinder comprises a cylinder body, an embedded steel plate and an embedded bolt, the embedded steel plate is arranged at the top of the cylinder body, the embedded steel plate is detachably connected with the cylinder body through the embedded bolt, and the embedded steel plate is welded with the reinforcing sleeve.
Optionally, the supporting and sealing element includes a heat insulation plate, a supporting sleeve and a ceramic fiber square braided rope, the supporting sleeve is connected with the bottom of the connecting pipe, the heat insulation plate is arranged at the bottom of the supporting sleeve and detachably connected with the supporting sleeve, a sealing groove is formed between the heat insulation plate and the supporting sleeve, the ceramic fiber square braided rope is arranged in the sealing groove, and the ceramic fiber square braided rope is abutted to the inner wall of the cylinder.
Optionally, the heat insulating plate is a ceramic plate.
Optionally, the sealing groove is annular.
Optionally, the seal receptacle includes an inner steel sleeve, a support plate and an upper pressure plate, the inner steel sleeve is sleeved outside the inner gland, the upper pressure plate is disposed at the top of the inner steel sleeve, the support plate is disposed inside the inner steel sleeve and connected to the bottom edge of the inner steel sleeve, and the support plate is used for supporting the inner gland.
Optionally, the seal receptacle further includes an outer steel sleeve and a cross rod, the outer steel sleeve is disposed outside the inner steel sleeve, and the cross rod is disposed at the top of the outer steel sleeve and connected therewith.
Optionally, the double-chamber limekiln fire pulling hole structure further comprises a protective cover, and the protective cover is sleeved outside the sealing seat.
The embodiment of the invention also provides a preparation method for preparing the double-hearth lime kiln fire hole structure, which comprises the following steps:
fixing the embedded steel plate on the top of the cylinder body through an embedded bolt;
after the inner barrel of the mullite castable is manufactured, the inner barrel is embedded into a refractory material to form a whole;
and welding the corrugated compensator at the bottom of the sealing seat, forming a whole with the sealing seat, inserting the whole into the upper kiln shell mounting hole for positioning, and welding the corrugated compensator and the mullite castable inner barrel.
The double-hearth limekiln fire hole structure and the preparation method have the beneficial effects that:
this two thorax limekiln hole structures of drawing a fire includes the seal receptacle, mullite castable inner tube, interior gland, the connecting pipe, supporting seal spare and ripple compensator, interior gland sets up in the top of mullite castable inner tube, interior gland is equipped with the cavity, the cavity is used for setting up the packing, the top of connecting pipe is connected with the bottom of interior gland, mullite castable inner tube is stretched into to the bottom of connecting pipe, supporting seal spare sets up in the bottom of connecting pipe, and the edge of supporting seal spare and the inner wall butt of mullite castable inner tube are in order to form sealedly, the outside of interior gland is located to ripple compensator cover, the top and the seal receptacle of ripple compensator are connected, the bottom and the mullite castable inner tube of ripple compensator are connected, the ripple compensator is used for forming seal structure between seal receptacle and mullite castable inner tube. This two thorax limekiln hole structure of drawing a fire is when using, and the service temperature of mullite pouring material is high, can use for a long time at 1350 ℃, and mullite pouring material inner tube can bear high temperature, alleviates the hole of drawing a fire because the easy deformation of steel inner tube leads to the problem of its peripheral refractory material fracture, supports sealing member and corrugated compensator simultaneously and carries out double seal to the hole of drawing a fire, avoids the peripheral gas channeling of taking place of hole of drawing a fire to form thermal runaway, reduces the potential safety hazard.
The preparation method comprises the steps of preparing the double-hearth limekiln fire hole structure, wherein the preparation method comprises the following steps: fixing the embedded steel plate on the top of the cylinder body through an embedded bolt; after the inner barrel of the mullite castable is manufactured, the inner barrel is embedded into a refractory material to form a whole; and welding the corrugated compensator at the bottom of the sealing seat, forming a whole with the sealing seat, inserting the whole into the upper kiln shell mounting hole for positioning, and welding the corrugated compensator and the mullite castable inner barrel. The preparation method is simple and convenient to operate.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of a dual-chamber limekiln fire hole structure provided in this embodiment;
fig. 2 is a schematic structural diagram of the ripple compensator provided in this embodiment.
Icon: 10-a sealing seat; 11-inner steel jacket; 12-a support plate; 13-upper press plate; 14-outer steel jacket; 15-a cross bar; 16-wedge; 17-ear well plate; 18-a fixation sleeve; 20-mullite castable inner barrel; 21-a cylinder body; 22-pre-burying a steel plate; 23-embedding bolts; 30-inner gland; 31-a cavity; 40-connecting pipe; 50-a support seal; 51-a heat insulation plate; 52-support sleeve; 53-ceramic fiber square braided rope; 60-a ripple compensator; 61-a corrugated sleeve; 62-a reinforcing sleeve; 70-a protective cover; 100-double-chamber lime kiln fire drawing hole structure.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. 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.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that, if the terms "upper", "lower", "inner", "outer", etc. are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which the product of the present invention is used to usually place, it is only for convenience of description and simplification of the description, but it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.
The double-chamber lime kiln is a mainstream lime kiln type which is widely applied in active lime production in the domestic metallurgy and chemical industry at present, and is based on the heat storage and parallel flow calcination process characteristics of the double-chamber lime kiln, annular channels are arranged below the calcination belts of the two chambers and are connected with the annular channels of the two chambers through direct-connection channels, and in the production process, flue gas in the lime kiln enters the annular channel of the other chamber from the annular channel of one chamber. The fire drawing holes are arranged above the annular channel of each kiln chamber, and the fire drawing holes are mainly used for checking and cleaning the channel.
Because the hole of drawing a fire sets up in kiln thorax annular passage top, draws a fire the hole and need bear high temperature, consequently draw a fire the hole and exist the steel inner tube and warp easily and lead to its peripheral refractory material fracture and then cause the peripheral blowby gas of hole of drawing a fire to form the problem of thermal runaway among the prior art.
Referring to fig. 1-2, the present embodiment provides a dual-chamber lime kiln fire hole structure 100. This two thorax limekiln hole structure 100 of drawing a fire can effectively improve the above-mentioned technical problem, can alleviate the hole of drawing a fire because the steel inner tube warp easily leads to the problem of its peripheral refractory material fracture, avoids drawing the peripheral gas blowby of hole and takes place thermal runaway, reduces the potential safety hazard.
Referring to fig. 1 and 2, the dual-bore lime kiln fire hole structure 100 includes a seal holder 10, a mullite castable inner cylinder 20, an inner gland 30, a connecting pipe 40, a supporting sealing member 50, and a corrugated compensator 60, wherein the inner gland 30 is disposed at the top of the mullite castable inner cylinder 20, the inner gland 30 is provided with a cavity 31, the cavity 31 is used for disposing a filling member, the top end of the connecting pipe 40 is connected with the bottom of the inner gland 30, the bottom end of the connecting pipe 40 extends into the mullite castable inner cylinder 20, the supporting sealing member 50 is disposed at the bottom end of the connecting pipe 40, the edge of the supporting sealing member 50 is abutted against the inner wall of the mullite castable inner cylinder 20 to form a seal, the corrugated compensator 60 is sleeved outside the inner gland 30, the top end of the corrugated compensator 60 is connected with the seal holder 10, the bottom end of the corrugated compensator 60 is connected with the mullite castable inner cylinder 20, and the corrugated compensator 60 is used for forming a seal structure between the seal holder 10 and the mullite castable inner cylinder 20.
Specifically, the temperature of the kiln shell at the fire hole in the prior art is normally required to be below 120 ℃, but actually the temperature of the kiln shell reaches about 180 ℃ in the initial production period and about 240 ℃ in the later period, and the glowing temperature of the kiln shell causes the problems of severe working environment on site, steel structure potential safety hazards such as cracking of the kiln shell and the like, loss of heat energy and the like. The high temperature of the kiln shell is mainly caused by the following reasons: ramming material refractory materials are arranged around the inner steel cylinder with the fire holes, the inner steel cylinder with the fire holes is made of ZG40Cr20Ni20, the ramming material around the inner steel cylinder with the fire holes has different thermal deformation coefficients, the steel deformation is large, the refractory material deformation is small, and sudden temperature change can be generated when the kiln is stopped, blown down, re-blown and stopped by a cleaning channel in the actual production process. The refractory material can cause high temperature of the kiln shell after gaps or cracks appear, so that the kiln shell of a steel structure deforms and cracks, and potential safety hazards are brought. The top of the fire hole is a gland type sealing seat which is mainly used for preventing the air leakage from the inner cylinder of the fire hole due to high-pressure flue gas in the kiln shell during production. The fire pulling hole comprises an upper pressing plate, a sealing seat, a ceramic fiber square braided rope, a wedge, an inner pressing cover and the like, the ceramic fiber square braided rope is placed in a groove of the sealing seat, then a cross rod is placed in an ear hole plate of the sealing seat, the wedge is inserted into the lower part of the cross rod, and after the wedge is tightened, the upper pressing plate presses the ceramic fiber square braided rope for sealing. At present, the upper sealing seat only has one sealing, complete sealing cannot be guaranteed, an inner gland is a steel structural part, heat insulation measures are not provided, and the main reason for serious heat dissipation of the periphery of a fire pulling hole is solved. In order to solve the technical problems, when the double-hearth limekiln fire hole structure 100 provided by the embodiment is used, the use temperature of the mullite castable is high, the mullite castable can be used for a long time at 1350 ℃, can be directly contacted with flame to be used as a working lining, has light unit volume weight, low heat conductivity coefficient, good baking performance and short baking time, can shorten the baking time, has high structural strength of a manufactured piece of the mullite castable after baking, can bear high temperature, and relieves the problem that the fire hole is easy to crack after being baked at high temperature, and simultaneously supports the sealing piece 50 and the corrugated compensator 60 to perform double sealing on the fire hole, thereby avoiding the occurrence of blow-by at the periphery of the fire hole and forming thermal runaway, and reducing potential safety hazards.
In the present embodiment, the corrugated compensator 60 includes a corrugated sleeve 61 and a reinforcing sleeve 62, the reinforcing sleeve 62 is connected to the bottom of the corrugated sleeve 61, and the reinforcing sleeve 62 is fixedly connected to the top of the mullite castable inner tube 20.
Wherein, the number of the reinforcing sleeve 62 is two, and the two reinforcing sleeves 62 are respectively connected with two ends of the corrugated sleeve 61.
In the present embodiment, the thickness of the reinforcing sleeve 62 is 10mm. In other embodiments, the thickness of the reinforcing sleeve 62 can be adjusted according to actual use conditions, and is not limited in particular.
Specifically, the mullite castable inner cylinder 20 comprises a cylinder body 21, an embedded steel plate 22 and embedded bolts 23, wherein the embedded steel plate 22 is arranged at the top of the cylinder body 21, the embedded steel plate 22 is detachably connected with the cylinder body 21 through the embedded bolts 23, and the embedded steel plate 22 is welded with the reinforcing sleeve 62, so that welding airtightness is guaranteed.
It should be noted that the barrel 21 is a prefabricated structure, and the mullite castable inner barrel 20 is prefabricated before installation, because the mullite castable inner barrel 20 is manufactured offline, the baking technical requirements of the castable can be ensured, and the structural strength of the mullite castable inner barrel 20 is ensured.
The embedded bolts 23 of the embodiment are M16 bolts, the bolts 23 are embedded at the upper part of the mullite castable inner cylinder 20, and after the mullite castable inner cylinder 20 is baked and maintained to be qualified, the embedded steel plates 22 are fixed on the mullite castable inner cylinder 20 through the embedded bolts 23.
The connecting pipe 40 in this embodiment is a DN50 steel pipe.
In this embodiment, the supporting sealing member 50 includes a heat insulation plate 51, a supporting sleeve 52 and a ceramic fiber square braid 53, the supporting sleeve 52 is connected to the bottom of the connecting pipe 40, the heat insulation plate 51 is disposed at the bottom of the supporting sleeve 52 and detachably connected to the supporting sleeve 52, a sealing groove is formed between the heat insulation plate 51 and the supporting sleeve 52, the ceramic fiber square braid 53 is disposed in the sealing groove, and the ceramic fiber square braid 53 abuts against the inner wall of the barrel 21.
The interior gland 30 of this embodiment is cast with ZG40Cr25N20Si2, and the filling member adopts the ramming mass, utilizes the ramming mass to insulate against heat, and the otic placode for the hook is welded on the 31 upper portion of cavity of interior gland 30, when the hole of drawing a fire need be opened to the clearance passageway, because interior gland 30 temperature is very high, hooks the otic placode for the hook with the hook, can avoid scalding interior gland 30 is carried out.
The connecting pipe 40 is welded to the bottom of the inner gland 30, the bottom end of the connecting pipe 40 is welded to the support sleeve 52, the support sleeve 52 is connected to the heat insulation plate 51 through bolts, and the heat insulation plate 51 is used for insulating heat radiation from the flue gas in the annular passage.
The size of the ceramic fiber square braided rope 53 in the embodiment is 24x24, the ceramic fiber square braided rope 53 can resist the high temperature of more than 1050 ℃, and the ceramic fiber square braided rope 53 is in extrusion contact with the inner wall of the mullite castable inner barrel 20, so that the airflow damping effect can be formed, the first barrier effect on the flue gas airflow is achieved, and the air tightness of the upper sealing seat 10 is improved.
In the present embodiment, the heat insulating plate 51 is a ceramic plate.
More, the seal groove is annular.
It should be further noted that the seal seat 10 includes an inner steel sleeve 11, a support plate 12 and an upper pressure plate 13, the inner steel sleeve 11 is sleeved outside the inner gland 30, the upper pressure plate 13 is disposed on the top of the inner steel sleeve 11, the support plate 12 is disposed inside the inner steel sleeve 11 and connected to the bottom edge of the inner steel sleeve 11, and the support plate 12 is used for supporting the inner gland 30.
More, the seal receptacle 10 further includes an outer steel sleeve 14 and a cross bar 15, the outer steel sleeve 14 is disposed outside the inner steel sleeve 11, and the cross bar 15 is disposed on the top of the outer steel sleeve 14 for connection.
Besides, the dual-chamber limekiln fire hole structure 100 further includes a protection cover 70, and the protection cover 70 is sleeved outside the sealing seat 10.
Specifically, a hood lifting lug is provided on the top of the protective hood 70.
The seal seat 10 in this embodiment further includes a wedge 16, an ear hole plate 17 and a fixing sleeve 18, the wedge 16 is disposed on the top of the upper pressure plate 13, a through hole is disposed at the bottom of the cross rod 15, the end of the cross rod 15 is inserted into the clamping hole of the ear hole plate 17, the top of the wedge 16 is disposed in the through hole of the cross rod 15 for assembly, and the fixing sleeve 18 is disposed on the top of the cross rod 15 for fixing.
The embodiment of the invention also provides a preparation method for preparing the double-hearth lime kiln fire hole structure 100, which comprises the following steps:
s1: fixing the embedded steel plate 22 on the top of the cylinder 21 through an embedded bolt 23;
specifically, after the central positioning size of the mullite castable inner cylinder 20 is determined according to a drawing, an embedded steel plate 22 on the prefabricated inner cylinder is fixed on the top of the cylinder body 21 through an embedded bolt 23;
s2: after the mullite castable inner barrel 20 is manufactured, the mullite castable inner barrel is embedded into a refractory material to form a whole;
specifically, after the top refractory of the annular channel is constructed, the mullite castable inner barrel 20 is embedded in the refractory to form a whole;
s3: welding the corrugated compensator 60 at the bottom of the sealing seat 10, forming a whole with the sealing seat 10, inserting the whole into a mounting hole of an upper kiln shell for positioning, and welding the corrugated compensator 60 and the mullite castable inner barrel 20;
specifically, a reinforcing sleeve 62 of a corrugated compensator 60 is welded to the bottom of an upper sealing seat 10, the corrugated compensator 60 and the upper sealing seat 10 form an integral component, then the integral component is inserted from an upper kiln shell mounting hole, the coaxiality deviation of the center of a mullite castable inner cylinder 20 and the combination of the corrugated compensator 60 and the upper sealing seat 10 is required to be within 5mm, after positioning is completed, a gap of about 1mm is formed between the reinforcing sleeve 62 at the lower end of the corrugated compensator 60 and a pre-embedded steel plate 22 on the mullite castable inner cylinder 20, the reinforcing sleeve 62 at the lower end of the corrugated compensator 60 and the pre-embedded steel plate 22 on the mullite castable inner cylinder 20 are continuously welded, the welding quality is required to be ensured, the air tightness of a welding position is ensured, and the upper sealing seat 10 and an upper kiln shell are continuously welded;
s4: the ceramic fiber square braided rope 53 is placed in the sealing groove, the cross rod 15 is placed in the square clamping hole of the sealing seat 10, the wedge 16 is inserted into the lower portion of the cross rod 15, then the wedge 16 is tightened, and the inner gland 30 compresses the ceramic fiber square braided rope 53 for sealing.
The structure 100 of the fire hole of the double-hearth lime kiln and the preparation method thereof provided by the embodiment at least have the following advantages:
the temperature of a kiln shell at a fire drawing hole in the prior art is normally required to be below 120 ℃, but actually the temperature reaches about 180 ℃ in the initial production period and about 240 ℃ in the later period, and the glowing temperature of the kiln shell causes the problems of severe working environment on site, steel structure potential safety hazards such as cracking of the kiln shell and the like, loss of heat energy and the like. The high temperature of the kiln shell is mainly caused by the following reasons: ramming material refractory materials are arranged around the inner steel cylinder with the fire holes, the inner steel cylinder with the fire holes is made of ZG40Cr20Ni20, the ramming material around the inner steel cylinder with the fire holes has different thermal deformation coefficients, the steel deformation is large, the refractory material deformation is small, and sudden temperature change can be generated when the kiln is stopped, blown down, re-blown and stopped by a cleaning channel in the actual production process. The refractory material can cause high temperature of the kiln shell after gaps or cracks appear, so that the kiln shell of a steel structure deforms and cracks, and potential safety hazards are brought. The top of the fire hole is a gland type sealing seat which is mainly used for preventing air leakage from the inner cylinder of the fire hole due to high-pressure flue gas in the kiln shell during production. The fire pulling hole comprises an upper pressing plate, a sealing seat, a ceramic fiber square braided rope, a wedge, an inner pressing cover and the like, the ceramic fiber square braided rope is placed in a groove of the sealing seat, then a cross rod is placed in an ear hole plate of the sealing seat, the wedge is inserted into the lower part of the cross rod, and after the wedge is tightened, the upper pressing plate presses the ceramic fiber square braided rope for sealing. At present, the upper sealing seat only has one sealing, complete sealing cannot be guaranteed, an inner gland is a steel structural part, heat insulation measures are not provided, and the main reason for serious heat dissipation of the periphery of a fire pulling hole is solved. In order to solve the technical problems, when the double-hearth limekiln fire hole structure 100 provided by the embodiment is used, the use temperature of the mullite castable is high, the mullite castable can be used for a long time at 1350 ℃, the mullite castable can be directly connected with flame to be used as a working lining, the unit volume weight is light, the heat conductivity coefficient is low, the baking performance is good, the baking time is short, the baking time can be shortened, the structural strength of a manufactured part of the mullite castable after baking is high, the mullite castable inner cylinder 20 can bear high temperature, the problem that the fire hole is easy to crack after being baked at high temperature is solved, meanwhile, the sealing element 50 and the corrugated compensator 60 are supported to perform double sealing on the fire hole, the phenomenon that air blowby around the fire hole is out and thermal runaway is caused is avoided, and the potential safety hazard is reduced.
The corrugated compensator 60 of the double-hearth lime kiln fire hole structure 100 mainly plays a role of flexible connection, so that the part where air leakage cannot occur between the upper sealing seat 10 and the mullite castable inner cylinder 20 is made of a steel structure, but the thermal deformation cannot form an extrusion damage effect on the mullite castable inner cylinder 20 due to the flexible compensation effect of the corrugated compensator 60.
In summary, the embodiment of the present invention provides a dual-chamber lime kiln fire hole structure 100 and a preparation method thereof, the dual-chamber lime kiln fire hole structure 100 includes a seal seat 10, a mullite castable inner cylinder 20, an inner gland 30, a connecting pipe 40, a supporting sealing element 50, and a corrugated compensator 60, the inner gland 30 is disposed at the top of the mullite castable inner cylinder 20, the inner gland 30 is provided with a cavity 31, the cavity 31 is used for disposing a filling element, the top end of the connecting pipe 40 is connected with the bottom of the inner gland 30, the bottom end of the connecting pipe 40 extends into the mullite castable inner cylinder 20, the supporting sealing element 50 is disposed at the bottom end of the connecting pipe 40, the edge of the supporting sealing element 50 is abutted against the inner wall of the mullite castable inner cylinder 20 to form a seal, the corrugated compensator 60 is sleeved outside the inner gland 30, the top end of the corrugated compensator 60 is connected with the seal seat 10, the bottom end of the corrugated compensator 60 is connected with the mullite castable inner cylinder 20, and the corrugated compensator 60 is used for forming a seal structure between the seal seat 10 and the mullite castable inner cylinder 20. This two thorax limekiln fire hole structure 100 is when using, and the service temperature of mullite pouring material is high, can use for a long time at 1350 ℃, and mullite pouring material inner tube 20 can bear high temperature, alleviates the fire hole because the easy deformation of steel inner tube leads to the problem of its peripheral refractory material fracture, supports sealing member 50 and corrugated compensator 60 simultaneously and carries out double seal to the fire hole, avoids taking place to scurry gas and forms thermal runaway, reduces the potential safety hazard around the fire hole.
The preparation method comprises the steps of preparing the double-hearth limekiln fire hole structure 100, and comprises the following steps: fixing the embedded steel plate on the top of the cylinder 21 through embedded bolts 23; after the mullite castable inner barrel 20 is manufactured, the mullite castable inner barrel is embedded into a refractory material to form a whole; the corrugated compensator 60 is welded at the bottom of the sealing seat 10 and is integrated with the sealing seat 10, then the whole is inserted and positioned from the mounting hole of the upper kiln shell, and the corrugated compensator 60 and the mullite castable inner barrel 20 are welded. The preparation method is simple and convenient to operate.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. The utility model provides a fire hole structure is pulled out to two thorax limekilns which characterized in that includes:
a seal seat (10);
an inner mullite castable cylinder (20);
the inner gland (30), the inner gland (30) is arranged at the top of the mullite castable inner cylinder (20), the inner gland (30) is provided with a cavity (31), and the cavity (31) is used for arranging a filling piece;
the top end of the connecting pipe (40) is connected with the bottom of the inner gland (30), and the bottom end of the connecting pipe (40) extends into the mullite castable inner cylinder (20);
a supporting sealing element (50), wherein the supporting sealing element (50) is arranged at the bottom end of the connecting pipe (40), and the edge of the supporting sealing element (50) is abutted with the inner wall of the mullite castable inner tube (20) to form a seal; and
the corrugated compensator (60) is sleeved outside the inner gland (30), the top end of the corrugated compensator (60) is connected with the sealing seat (10), the bottom end of the corrugated compensator (60) is connected with the mullite castable inner tube (20), and the corrugated compensator (60) is used for forming a sealing structure between the sealing seat (10) and the mullite castable inner tube (20).
2. The dual-bore lime kiln fire hole structure of claim 1, wherein the corrugated compensator (60) comprises a corrugated sleeve (61) and a reinforcing sleeve (62), the reinforcing sleeve (62) is connected with the bottom of the corrugated sleeve (61), and the reinforcing sleeve (62) is fixedly connected with the top of the mullite castable inner tube (20).
3. The dual-chamber lime kiln fire hole structure of claim 2, wherein the mullite castable inner cylinder (20) comprises a cylinder body (21), an embedded steel plate (22) and embedded bolts (23), the embedded steel plate (22) is arranged at the top of the cylinder body (21), the embedded steel plate (22) is detachably connected with the cylinder body (21) through the embedded bolts (23), and the embedded steel plate (22) is welded with the reinforcing sleeve (62).
4. The double-hearth lime kiln fire hole structure according to claim 3, wherein the support sealing member (50) comprises a heat insulating plate (51), a support sleeve (52) and a ceramic fiber square braid (53), the support sleeve (52) is connected with the bottom of the connecting pipe (40), the heat insulating plate (51) is disposed at the bottom of the support sleeve (52) and detachably connected with the support sleeve (52), a sealing groove is formed between the heat insulating plate (51) and the support sleeve (52), the ceramic fiber square braid (53) is disposed in the sealing groove, and the ceramic fiber square braid (53) is abutted against the inner wall of the cylinder (21).
5. The double-hearth limekiln fire hole structure of claim 4, wherein the heat insulation plate (51) is a ceramic plate.
6. The dual-bore limekiln fire hole structure of claim 4, wherein the sealing groove is ring-shaped.
7. The dual-bore limekiln fire hole structure of claim 1, wherein the sealing seat (10) comprises an inner steel sleeve (11), a support plate (12) and an upper pressure plate (13), the inner steel sleeve (11) is sleeved outside the inner gland (30), the upper pressure plate (13) is arranged on the top of the inner steel sleeve (11), the support plate (12) is arranged inside the inner steel sleeve (11) and connected with the bottom edge of the inner steel sleeve (11), and the support plate (12) is used for supporting the inner gland (30).
8. The dual-bore limekiln fire hole structure of claim 7, wherein the sealing seat (10) further comprises an outer steel sleeve (14) and a cross bar (15), the outer steel sleeve (14) is arranged outside the inner steel sleeve (11), and the cross bar (15) is arranged on the top of the outer steel sleeve (14) for connection.
9. The dual-bore lime kiln fire hole structure of claim 7, wherein the dual-bore lime kiln fire hole structure (100) further comprises a protective cover (70), and the protective cover (70) is sleeved outside the sealing seat (10).
10. A method for preparing a dual-bore lime kiln fire hole structure, for preparing the dual-bore lime kiln fire hole structure (100) of any one of claims 1-9, the method comprising:
fixing the embedded steel plate (22) on the top of the cylinder body (21) through an embedded bolt (23);
after the mullite castable inner barrel (20) is manufactured, the mullite castable inner barrel is embedded into a refractory material to form a whole;
and welding the corrugated compensator (60) at the bottom of the sealing seat (10) and forming a whole with the sealing seat (10), then inserting the whole into the upper kiln shell mounting hole for positioning, and welding the corrugated compensator (60) and the mullite castable inner barrel (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211393958.2A CN115650605B (en) | 2022-11-08 | 2022-11-08 | Double-chamber lime kiln fire hole pulling structure and preparation method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211393958.2A CN115650605B (en) | 2022-11-08 | 2022-11-08 | Double-chamber lime kiln fire hole pulling structure and preparation method |
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| CN115650605B CN115650605B (en) | 2023-10-20 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208635552U (en) * | 2018-06-28 | 2019-03-22 | 广东科达洁能股份有限公司 | A kind of tunnel oven is folded to burn device |
| CN112066372A (en) * | 2020-09-08 | 2020-12-11 | 广东韶钢松山股份有限公司 | Spray gun and double-chamber kiln |
| CN216242254U (en) * | 2021-11-29 | 2022-04-08 | 河北携海工程技术有限公司 | Fire hole sealing device |
-
2022
- 2022-11-08 CN CN202211393958.2A patent/CN115650605B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208635552U (en) * | 2018-06-28 | 2019-03-22 | 广东科达洁能股份有限公司 | A kind of tunnel oven is folded to burn device |
| CN112066372A (en) * | 2020-09-08 | 2020-12-11 | 广东韶钢松山股份有限公司 | Spray gun and double-chamber kiln |
| CN216242254U (en) * | 2021-11-29 | 2022-04-08 | 河北携海工程技术有限公司 | Fire hole sealing device |
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| CN115650605B (en) | 2023-10-20 |
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