CN115650605B - Double-chamber lime kiln fire hole pulling structure and preparation method - Google Patents
Double-chamber lime kiln fire hole pulling structure and preparation method Download PDFInfo
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- CN115650605B CN115650605B CN202211393958.2A CN202211393958A CN115650605B CN 115650605 B CN115650605 B CN 115650605B CN 202211393958 A CN202211393958 A CN 202211393958A CN 115650605 B CN115650605 B CN 115650605B
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- 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-chamber lime kiln fire hole structure and a preparation method thereof, and relates to the field of fire hole structures. The double-chamber lime kiln fire hole structure comprises a sealing seat, a mullite castable inner cylinder, an inner gland, a connecting pipe, a supporting sealing piece and a ripple compensator, wherein the inner gland is arranged at the top of the mullite castable inner cylinder, the inner gland is provided with a cavity, the cavity is used for setting a filling piece, the top end of the connecting pipe is connected with the bottom of the inner gland, the bottom end of the connecting pipe stretches into the mullite castable inner cylinder, the supporting sealing piece is arranged at the bottom end of the connecting pipe, the edge of the supporting sealing piece is abutted to the inner wall of the mullite castable inner cylinder to form a seal, the ripple compensator is sleeved outside the inner gland, the top end of the ripple compensator is connected with the sealing seat, and the bottom end of the ripple compensator is connected with the mullite castable inner cylinder. The mullite castable inner cylinder can bear high temperature, and the problem that the fire pulling hole is easy to deform after being baked at high temperature is solved.
Description
Technical Field
The invention relates to the field of fire hole structures, in particular to a double-chamber lime kiln fire hole structure and a preparation method thereof.
Background
The double-chamber lime kiln is a mainstream lime kiln type with wider application in the production of active lime in the metallurgical and chemical industries in China at present, based on the heat accumulation and parallel-flow calcination process characteristics of the double-chamber lime kiln, an annular channel is arranged below a calcination zone of two kiln chambers, the annular channel is connected with the annular channels of the two kiln chambers through a direct communication channel, and in the production process, flue gas in the kiln enters the annular channel of one kiln chamber from the annular channel of the other kiln chamber. The fire pulling holes are arranged above the annular channels of each kiln chamber, and the fire pulling holes are mainly used for checking and cleaning the channels.
Because the fire pulling hole is arranged above the annular passage of the kiln chamber, the fire pulling hole needs to bear high temperature, and therefore, the fire pulling Kong Cunzai steel inner cylinder in the prior art is easy to deform, so that the peripheral refractory materials of the steel inner cylinder are cracked, and further, the problem of thermal runaway of the peripheral blowby gas of the fire pulling hole is caused.
Disclosure of Invention
The invention provides a double-chamber lime kiln fire hole structure and a preparation method thereof, which can relieve the problem that peripheral refractory materials of a fire hole crack due to easy deformation of a steel inner barrel, avoid gas channeling around the fire hole to form thermal runaway, and reduce potential safety hazards.
Embodiments of the invention may be implemented as follows:
the embodiment of the invention provides a double-chamber lime kiln fire hole pulling structure, which comprises the following components:
a sealing seat;
mullite castable inner cylinder;
the inner gland is arranged at the top of the mullite castable inner cylinder and is provided with a cavity for arranging a filling piece;
the top end of the connecting pipe is connected with the bottom of the inner pressure cover, and the bottom end of the connecting pipe stretches into the mullite castable inner cylinder;
the support sealing piece is arranged at the bottom end of the connecting pipe, and the edge of the support sealing piece is abutted with the inner wall of the mullite castable inner cylinder 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 cylinder, and the corrugated compensator is used for forming a sealing structure between the sealing seat and the mullite castable inner cylinder.
Optionally, the ripple compensator includes ripple sleeve and enhancement cover, the enhancement cover with the bottom of ripple sleeve is connected, the enhancement cover with the top fixed connection of mullite castable inner tube.
Optionally, the mullite castable inner cylinder comprises a cylinder body, an embedded steel plate and an embedded bolt, wherein 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 support sealing member includes heat insulating board, support cover and ceramic fiber square braiding rope, support the cover with the bottom of connecting pipe is connected, the heat insulating board set up in support the bottom of cover and with support cover detachably connects, just the heat insulating board with form the seal groove between the support cover, ceramic fiber square braiding rope set up in the seal groove, ceramic fiber square braiding rope with the inner wall butt of barrel.
Optionally, the heat insulation board is a ceramic board.
Optionally, the seal groove is annular.
Optionally, the seal seat includes interior steel bushing, backup pad and top board, interior steel bushing is located the outside of interior gland, the top board set up in the top of interior steel bushing, the backup pad set up in the inside of interior steel bushing, and with the bottom edge connection of interior steel bushing, the backup pad is used for supporting interior gland.
Optionally, the sealing seat further comprises an outer steel sleeve and a cross rod, the outer steel sleeve is arranged outside the inner steel sleeve, and the cross rod is arranged at the top of the outer steel sleeve and connected.
Optionally, the dual-chamber lime kiln fire 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-chamber lime kiln fire hole structure, which comprises the following steps:
fixing an embedded steel plate on the top of the cylinder body through an embedded bolt;
after the mullite castable inner cylinder is manufactured, embedding the mullite castable inner cylinder 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 cylinder.
The dual-chamber lime kiln fire hole pulling structure and the preparation method have the beneficial effects that:
the double-chamber lime kiln fire hole structure comprises a sealing seat, a mullite castable inner cylinder, an inner gland, a connecting pipe, a supporting sealing piece and a ripple compensator, wherein the inner gland is arranged at the top of the mullite castable inner cylinder, the inner gland is provided with a cavity, the cavity is used for setting a filling piece, the top end of the connecting pipe is connected with the bottom of the inner gland, the bottom end of the connecting pipe stretches into the mullite castable inner cylinder, the supporting sealing piece is arranged at the bottom end of the connecting pipe, the edge of the supporting sealing piece is abutted to the inner wall of the mullite castable inner cylinder to form a seal, the ripple compensator is sleeved outside the inner gland, the top end of the ripple compensator is connected with the sealing seat, the bottom end of the ripple compensator is connected with the mullite castable inner cylinder, and the ripple compensator is used for forming a sealing structure between the sealing seat and the mullite castable inner cylinder. When the dual-chamber lime kiln fire hole structure 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 inner cylinder can bear high temperature, the problem that the periphery refractory materials of the fire hole crack due to easy deformation of the steel inner cylinder is relieved, meanwhile, the support sealing piece and the corrugated compensator perform dual sealing on the fire hole, the occurrence of gas channeling around the fire hole is avoided, the thermal runaway is formed, and the potential safety hazard is reduced.
The preparation method comprises the steps of preparing a double-chamber lime kiln fire hole structure, wherein the preparation method comprises the following steps: fixing an embedded steel plate on the top of the cylinder body through an embedded bolt; after the mullite castable inner cylinder is manufactured, embedding the mullite castable inner cylinder 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 cylinder. The preparation method is convenient and simple to operate.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a fire hole structure of a dual-chamber lime kiln provided in this embodiment;
fig. 2 is a schematic structural diagram of a ripple compensator provided in this embodiment.
Icon: 10-a sealing seat; 11-an inner steel sleeve; 12-supporting plates; 13-an upper press plate; 14-an outer steel sleeve; 15-a cross bar; 16-wedge; 17-earhole plate; 18-fixing the sleeve; 20-a mullite castable inner cylinder; 21-a cylinder; 22-embedding a steel plate; 23-embedding bolts; 30-an inner gland; 31-cavity; 40-connecting pipes; 50-supporting the seal; 51-heat insulation board; 52-supporting sleeve; 53-ceramic fiber square braided rope; 60-ripple compensator; 61-a corrugated sleeve; 62-reinforcing sleeve; 70-protecting cover; 100-double-chamber lime kiln fire hole structure.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the 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 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 made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present invention, it should be noted that, if the terms "upper", "lower", "inner", "outer", and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, or the azimuth or the positional relationship in which the inventive product is conventionally put in use, it is merely for convenience of describing the present invention and simplifying the description, and it is not indicated or implied that the apparatus or element referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus it should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, if any, are used merely for distinguishing between descriptions and not for indicating or implying a 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 with wider application in the production of active lime in the metallurgical and chemical industries in China at present, based on the heat accumulation and parallel-flow calcination process characteristics of the double-chamber lime kiln, an annular channel is arranged below a calcination zone of two kiln chambers, the annular channel is connected with the annular channels of the two kiln chambers through a direct communication channel, and in the production process, flue gas in the kiln enters the annular channel of one kiln chamber from the annular channel of the other kiln chamber. The fire pulling holes are arranged above the annular channels of each kiln chamber, and the fire pulling holes are mainly used for checking and cleaning the channels.
Because the fire pulling hole is arranged above the annular passage of the kiln chamber, the fire pulling hole needs to bear high temperature, and therefore, the fire pulling Kong Cunzai steel inner cylinder in the prior art is easy to deform, so that the peripheral refractory materials of the steel inner cylinder are cracked, and further, the problem of thermal runaway of the peripheral blowby gas of the fire pulling hole is caused.
Referring to fig. 1-2, the present embodiment provides a dual-chamber lime kiln fire hole structure 100. The dual-chamber lime kiln fire hole structure 100 can effectively solve the technical problems, can relieve the problem that the fire hole is cracked by the peripheral refractory materials due to easy deformation of the steel inner barrel, avoids the occurrence of gas channeling around the fire hole to form thermal runaway, and reduces potential safety hazards.
Referring to fig. 1 and 2, the dual-chamber lime kiln fire hole structure 100 comprises a sealing seat 10, a mullite castable inner cylinder 20, an inner pressure cover 30, a connecting pipe 40, a supporting sealing member 50 and a ripple compensator 60, wherein the inner pressure cover 30 is arranged at the top of the mullite castable inner cylinder 20, the inner pressure cover 30 is provided with a cavity 31, the cavity 31 is used for arranging a filling member, the top end of the connecting pipe 40 is connected with the bottom of the inner pressure cover 30, the bottom end of the connecting pipe 40 extends into the mullite castable inner cylinder 20, the supporting sealing member 50 is arranged 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 ripple compensator 60 is sleeved outside the inner pressure cover 30, the top end of the ripple compensator 60 is connected with the sealing seat 10, the bottom end of the ripple compensator 60 is connected with the mullite castable inner cylinder 20, and the ripple compensator 60 is used for forming a sealing structure between the sealing seat 10 and the mullite castable inner cylinder 20.
Specifically, the kiln shell temperature at the fire pulling hole in the prior art is normally required to be lower than 120 ℃, but in practice, the initial production stage reaches about 180 ℃, and the later production stage reaches about 240 ℃, so that the problems of severe working environment, potential safety hazards of steel structures such as kiln shell cracking, heat energy loss and the like in the field are caused by the glowing kiln shell temperature. The kiln shell high temperature is mainly caused by the following reasons: the inner cylinder of the fire hole steel is made of ZG40Cr20Ni20, the thermal deformation coefficient of the fire hole steel inner cylinder and the thermal deformation coefficient of the fire hole steel inner cylinder are different, the deformation of the fire hole steel inner cylinder is large due to the large deformation of steel, the deformation of the fire resistant material is small, when the kiln is in damping down and re-blowing in the actual production process and the cleaning channel is stopped, the temperature suddenly changes, the thermal deformation of the fire hole steel inner cylinder extrudes the fire resistant material, the outer wall of the fire hole and the adjacent fire resistant material are caused to generate gaps, and the fire resistant material generates cracks when serious, especially the later stage of the furnace age is more obvious. After gaps or cracks appear in the refractory material, the kiln shell can be at high temperature, so that the steel structure kiln shell is deformed and cracked, and potential safety hazards are brought. The top of the fire hole is provided with 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 smoke in the kiln shell during production. The fire hole is composed of an upper pressing plate, a sealing seat, a ceramic fiber square braiding rope, a wedge, an inner gland and the like, the ceramic fiber square braiding rope is placed in a sealing seat groove, then a cross rod is placed in an earhole plate of the sealing seat, the wedge is inserted into the lower portion of the cross rod, and then after the wedge is tightened, the upper pressing plate tightly presses the ceramic fiber square braiding rope to seal. At present, the upper sealing seat is only sealed, the complete sealing cannot be ensured, the inner pressure cover is a steel structural member, and no heat insulation measures are provided, so that the inner pressure cover is a main reason that the heat dissipation at the periphery of the fire pulling hole is serious. In order to solve the technical problems, when the dual-chamber lime kiln fire hole structure 100 provided by the embodiment is used, the use temperature of mullite castable is high, the dual-chamber lime kiln fire hole structure can be used for a long time at 1350 ℃, the dual-chamber lime kiln fire hole structure can be directly contacted with flame to serve as a working lining, the unit volume weight is light, the heat conductivity is low, the baking performance is good, the baking time is short, the baking time can be shortened, the structural strength of a manufactured piece of mullite castable is high, the inner barrel 20 of the mullite castable can bear high temperature, the problem that the fire hole is easy to crack after being baked at high temperature is solved, meanwhile, the supporting sealing piece 50 and the ripple compensator 60 are used for dual-sealing the fire hole, the occurrence of gas channeling around the fire hole is avoided, the thermal runaway is formed, and the potential safety hazard is reduced.
In this 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 cylinder 20.
Wherein, the number of the reinforcing sleeves 62 is two, and two reinforcing sleeves 62 are respectively connected with two ends of the corrugated sleeve 61.
In this embodiment, the thickness of the reinforcing sleeve 62 is 10mm. In other embodiments, the thickness of the reinforcing sleeve 62 may be adjusted according to the actual use situation, and is not particularly limited herein.
Specifically, the mullite castable inner cylinder 20 comprises a cylinder 21, an embedded steel plate 22 and an embedded bolt 23, wherein the embedded steel plate 22 is arranged at the top of the cylinder 21, the embedded steel plate 22 is detachably connected with the cylinder 21 through the embedded bolt 23, and the embedded steel plate 22 is welded with the reinforcing sleeve 62, so that the welding air tightness is ensured.
It should be noted that, the cylinder 21 is a prefabricated structure, and the mullite castable inner cylinder 20 is prefabricated before installation, because the mullite castable inner cylinder 20 is manufactured off-line, the baking technical requirements of the castable can be ensured, and the structural strength of the mullite castable inner cylinder 20 is ensured.
The embedded bolts 23 in 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 cured to be qualified, the embedded steel plates 22 are fixed on the mullite castable inner cylinder 20 through the embedded bolts 23.
The connecting tube 40 in this embodiment is a DN50 steel tube.
In this embodiment, the supporting seal member 50 includes a heat insulation plate 51, a supporting sleeve 52 and a ceramic fiber square knitting rope 53, the supporting sleeve 52 is connected with the bottom of the connecting tube 40, the heat insulation plate 51 is disposed at the bottom of the supporting sleeve 52 and detachably connected with the supporting sleeve 52, a sealing groove is formed between the heat insulation plate 51 and the supporting sleeve 52, the ceramic fiber square knitting rope 53 is disposed in the sealing groove, and the ceramic fiber square knitting rope 53 is abutted with the inner wall of the cylinder 21.
In this embodiment, the inner pressure cover 30 is cast by ZG40Cr25N20Si2, the filling member is made of ramming material, the ramming material is used to insulate heat, the hook lug is welded on the upper portion of the cavity 31 of the inner pressure cover 30, when the fire hole needs to be opened for cleaning the channel, the hook lug is hooked by the hook due to the high temperature of the inner pressure cover 30, and the inner pressure cover 30 is lifted out to avoid scalding.
The connection pipe 40 is welded to the bottom of the inner pressure cover 30, the bottom end of the connection pipe 40 is welded to the support sleeve 52, the support sleeve 52 is connected to the heat insulation plate 51 by bolts, and the heat insulation plate 51 is used for isolating heat radiation from the smoke of the annular channel.
The size of the ceramic fiber square braided rope 53 in the embodiment is 24x24, the ceramic fiber square braided rope 53 can resist high temperature of over 1050 ℃, and as the ceramic fiber square braided rope 53 is in extrusion contact with the inner wall of the mullite castable inner cylinder 20, the damping effect of air flow can be formed, the first blocking effect is achieved on flue gas and air flow, and the air tightness of the upper sealing seat 10 is improved.
In this 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 pressure cover 30, the upper pressure plate 13 is disposed at 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 pressure cover 30.
Further, the seal holder 10 further includes an outer steel jacket 14 and a cross bar 15, the outer steel jacket 14 is disposed outside the inner steel jacket 11, and the cross bar 15 is disposed at the top of the outer steel jacket 14 and connected.
In addition, the dual-chamber lime kiln fire hole structure 100 further comprises a protective cover 70, and the protective cover 70 is sleeved outside the sealing seat 10.
Specifically, the top of the protective cover 70 is provided with a cover tab.
The sealing seat 10 in this embodiment further includes a wedge 16, an earhole plate 17 and a fixing sleeve 18, the wedge 16 is disposed at the top of the upper pressing 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 earhole 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 at 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 an embedded steel plate 22 on the top of the cylinder 21 through an embedded bolt 23;
specifically, after the center positioning size of the mullite castable inner cylinder 20 is determined according to a drawing, fixing an embedded steel plate 22 on the prefabricated inner cylinder on the top of the cylinder 21 through an embedded bolt 23;
s2: after the mullite castable inner cylinder 20 is manufactured, embedding the mullite castable inner cylinder into a refractory material to form a whole;
specifically, after the construction of the top refractory of the annular channel is completed, the mullite castable inner cylinder 20 is embedded in the refractory material to form a whole;
s3: welding the corrugated compensator 60 on the bottom of the sealing seat 10, forming a whole with the sealing seat 10, inserting the whole into the upper kiln shell mounting hole for positioning, and welding the corrugated compensator 60 and the mullite castable inner cylinder 20;
specifically, the reinforcing sleeve 62 of the corrugated compensator 60 is welded to the bottom of the upper sealing seat 10, the corrugated compensator 60 and the upper sealing seat 10 form an integral part, then the integral part is inserted from an upper kiln shell mounting hole, the coaxiality deviation between the center of the 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 the positioning is finished, a gap of about 1mm is formed between the lower reinforcing sleeve 62 of the corrugated compensator 60 and the embedded steel plate 22 on the mullite castable inner cylinder 20, the lower reinforcing sleeve 62 of the corrugated compensator 60 and the 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 the upper kiln shell are continuously welded;
s4: the ceramic fiber square braided rope 53 is placed in the sealing groove, then the cross rod 15 is placed in the square clamping hole of the sealing seat 10, the wedge 16 is inserted into the lower part of the cross rod 15, and after the wedge 16 is tightly pressed, the inner pressure cover 30 tightly presses the ceramic fiber square braided rope 53 to seal.
The dual-chamber lime kiln fire hole pulling structure 100 and the preparation method thereof have at least the following advantages:
in the prior art, the kiln shell temperature at a fire pulling hole is normally required to be lower than 120 ℃, but in practice, the initial production stage reaches about 180 ℃, and the later production stage reaches about 240 ℃, so that the problems of potential safety hazards of steel structures, heat energy loss and the like, such as severe working environment, kiln shell cracking and the like, are caused by the glowing kiln shell temperature. The kiln shell high temperature is mainly caused by the following reasons: the inner cylinder of the fire hole steel is made of ZG40Cr20Ni20, the thermal deformation coefficient of the fire hole steel inner cylinder and the thermal deformation coefficient of the fire hole steel inner cylinder are different, the deformation of the fire hole steel inner cylinder is large due to the large deformation of steel, the deformation of the fire resistant material is small, when the kiln is in damping down and re-blowing in the actual production process and the cleaning channel is stopped, the temperature suddenly changes, the thermal deformation of the fire hole steel inner cylinder extrudes the fire resistant material, the outer wall of the fire hole and the adjacent fire resistant material are caused to generate gaps, and the fire resistant material generates cracks when serious, especially the later stage of the furnace age is more obvious. After gaps or cracks appear in the refractory material, the kiln shell can be at high temperature, so that the steel structure kiln shell is deformed and cracked, and potential safety hazards are brought. The top of the fire hole is provided with 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 smoke in the kiln shell during production. The fire hole is composed of an upper pressing plate, a sealing seat, a ceramic fiber square braiding rope, a wedge, an inner gland and the like, the ceramic fiber square braiding rope is placed in a sealing seat groove, then a cross rod is placed in an earhole plate of the sealing seat, the wedge is inserted into the lower portion of the cross rod, and then after the wedge is tightened, the upper pressing plate tightly presses the ceramic fiber square braiding rope to seal. At present, the upper sealing seat is only sealed, the complete sealing cannot be ensured, the inner pressure cover is a steel structural member, and no heat insulation measures are provided, so that the inner pressure cover is a main reason that the heat dissipation at the periphery of the fire pulling hole is serious. In order to solve the technical problems, when the dual-chamber lime kiln fire hole structure 100 provided by the embodiment is used, the use temperature of mullite castable is high, the dual-chamber lime kiln fire hole structure can be used for a long time at 1350 ℃, the dual-chamber lime kiln fire hole structure can be directly connected with flame to serve as a working lining, the unit volume weight is light, the heat conductivity is low, the baking property is good, the baking time is short, the baking time can be shortened, the structural strength of a manufactured piece of the mullite castable is high, the inner barrel 20 of the mullite castable can bear high temperature, the problem that the fire hole is easy to crack after being baked at high temperature is solved, meanwhile, the supporting sealing piece 50 and the ripple compensator 60 are used for dual-sealing the fire hole, the occurrence of gas channeling around the fire hole is avoided, the thermal runaway is avoided, and the potential safety hazard is reduced.
The corrugated compensator 60 of the dual-chamber lime kiln fire hole structure 100 mainly plays a role in flexible connection, so that the upper sealing seat 10 and the mullite castable inner cylinder 20 cannot generate air leakage, and the corrugated compensator 60 has a steel structure, but the thermal deformation cannot form 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 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 comprises a sealing seat 10, a mullite castable inner cylinder 20, an inner pressure cover 30, a connecting pipe 40, a supporting sealing member 50 and a ripple compensator 60, wherein the inner pressure cover 30 is arranged at the top of the mullite castable inner cylinder 20, the inner pressure cover 30 is provided with a cavity 31, the cavity 31 is used for arranging a filling member, the top end of the connecting pipe 40 is connected with the bottom of the inner pressure cover 30, the bottom end of the connecting pipe 40 extends into the mullite castable inner cylinder 20, the supporting sealing member 50 is arranged 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 ripple compensator 60 is sleeved outside the inner gland 30, the top end of the ripple compensator 60 is connected with the sealing seat 10, the bottom end of the ripple compensator 60 is connected with the mullite castable inner cylinder 20, and the ripple compensator 60 is used for forming a sealing structure between the sealing seat 10 and the mullite castable inner cylinder 20. When the dual-chamber lime kiln fire hole structure 100 is used, the use temperature of mullite castable is high, the mullite castable can be used for a long time at 1350 ℃, the mullite castable inner cylinder 20 can bear high temperature, the problem that peripheral refractory materials of the fire hole crack due to easy deformation of a steel inner cylinder is relieved, meanwhile, the support sealing piece 50 and the corrugated compensator 60 perform dual sealing on the fire hole, the occurrence of gas channeling around the fire hole is avoided, the thermal runaway is avoided, and the potential safety hazard is reduced.
The preparation method comprises the steps of preparing a double-chamber lime kiln fire hole structure 100, wherein the preparation method comprises the following steps: fixing an embedded steel plate on the top of the cylinder 21 through an embedded bolt 23; after the mullite castable inner cylinder 20 is manufactured, embedding the mullite castable inner cylinder into a refractory material to form a whole; the corrugated compensator 60 is welded to the bottom of the sealing seat 10 and is integrated with the sealing seat 10, and then the integrated body is inserted and positioned from the upper kiln shell mounting hole, and the corrugated compensator 60 and the mullite castable inner cylinder 20 are welded. The preparation method is convenient and simple to operate.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present invention should be included in the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. A dual chamber lime kiln fire hole structure comprising:
a seal seat (10);
the mullite castable inner cylinder (20), the mullite castable inner cylinder (20) comprises a cylinder body (21), an embedded steel plate (22) and an embedded bolt (23), the embedded steel plate (22) is arranged at the top of the cylinder body (21), and the embedded steel plate (22) is detachably connected with the cylinder body (21) through the embedded bolt (23);
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 pressure cover (30), and the bottom end of the connecting pipe (40) stretches into the mullite castable inner cylinder (20);
the support sealing piece (50), the support sealing piece (50) set up in the bottom of connecting pipe (40), just the edge of support sealing piece (50) with the inner wall butt of mullite castable inner tube (20) is in order to form the seal, support sealing piece (50) include heat insulating board (51), support cover (52) and ceramic fiber square braid (53), support cover (52) with the bottom of connecting pipe (40) is connected, heat insulating board (51) set up in the bottom of support cover (52) and with support cover (52) detachably connects, just heat insulating board (51) with form the seal groove between support cover (52), ceramic fiber square braid (53) set up in the seal groove, ceramic fiber square braid (53) with the inner wall butt of barrel (21); and
the corrugated compensator (60) is sleeved outside the inner pressure cover (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 cylinder (20), and the corrugated compensator (60) is used for forming a sealing structure between the sealing seat (10) and the mullite castable inner cylinder (20); 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), the reinforcing sleeve (62) is fixedly connected with the top of the mullite castable inner cylinder (20), and the embedded steel plate (22) and the reinforcing sleeve (62) are welded.
2. The dual-chamber lime kiln fire hole structure according to claim 1, characterized in that the heat insulating plate (51) is a ceramic plate.
3. The dual bore lime kiln fire hole structure of claim 1, wherein the seal groove is annular.
4. The dual-chamber lime kiln fire hole structure according to claim 1, wherein the sealing seat (10) comprises an inner steel sleeve (11), a supporting plate (12) and an upper pressing plate (13), the inner steel sleeve (11) is sleeved outside the inner pressure cover (30), the upper pressing plate (13) is arranged at the top of the inner steel sleeve (11), the supporting plate (12) is arranged inside the inner steel sleeve (11) and is connected with the bottom edge of the inner steel sleeve (11), and the supporting plate (12) is used for supporting the inner pressure cover (30).
5. The dual-hearth lime kiln fire hole structure according to claim 4, wherein the sealing seat (10) further comprises an outer steel sleeve (14) and a cross rod (15), the outer steel sleeve (14) is arranged outside the inner steel sleeve (11), and the cross rod (15) is arranged at the top of the outer steel sleeve (14) and connected.
6. The dual-chamber lime kiln fire hole structure according to claim 4, wherein the dual-chamber lime kiln fire hole structure (100) further comprises a protective cover (70), and the protective cover (70) is sleeved outside the sealing seat (10).
7. A method for preparing a dual-chamber lime kiln fire hole structure (100) according to any one of claims 1-6, the method comprising:
the embedded steel plate (22) is fixed at the top of the cylinder (21) through an embedded bolt (23);
after the mullite castable inner cylinder (20) is manufactured, embedding the mullite castable inner cylinder 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 cylinder (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 true 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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| CN115650605A (en) | 2023-01-31 |
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