CN110922071A - Brickwork for annular channel of double-chamber lime kiln and construction method - Google Patents
Brickwork for annular channel of double-chamber lime kiln and construction method Download PDFInfo
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- CN110922071A CN110922071A CN201911296356.3A CN201911296356A CN110922071A CN 110922071 A CN110922071 A CN 110922071A CN 201911296356 A CN201911296356 A CN 201911296356A CN 110922071 A CN110922071 A CN 110922071A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2/00—Lime, magnesia or dolomite
- C04B2/10—Preheating, burning calcining or cooling
- C04B2/12—Preheating, burning calcining or cooling in shaft or vertical furnaces
Abstract
The invention discloses a brick for a double-chamber lime kiln annular channel and a construction method thereof. The brick has the advantages of simplicity, practicality, strong self-locking capability, stress concentration prevention, masonry structure strength improvement and the like, and the construction method has the advantages of simple steps, convenience in construction and the like.
Description
Technical Field
The invention relates to the field of lime kiln masonry structures, in particular to brickwork for a double-chamber lime kiln annular channel and a construction method.
Background
The existing lime kiln which is commonly used is a double-chamber lime kiln, is used for calcining limestone at high temperature to generate industrial quick lime, and the industrial quick lime is used as an additive in the processes of sintering iron-making raw materials, iron-making reduction, pretreatment of molten iron and external refining, plays roles in adjusting the alkalinity of furnace charge, slagging, desulfurizing and the like, and plays an important role in smoothly carrying out the iron-making and steel-making processes.
The double-hearth lime kiln has the advantages of high heat efficiency, small pollution and the like, so the double-hearth lime kiln is widely applied. The kiln body generally comprises two vertical kiln chambers which are mirror images of each other, and the two kiln chambers are connected through an annular channel. In the production process, the temperature of the annular channel is up to 900 ℃, the pressure in the channel is up to 20kP, and the annular channel is one of the places on the lime kiln equipment where the working condition environment is the worst and the structural damage is most likely to occur. The masonry structure at the passage is easy to cause local damage under the high-temperature and high-pressure environment, and finally the damage of the whole kiln chamber structure is developed, so that the service life of the lime kiln is influenced. Therefore, the strength of the annular channel is improved, and the method has a positive effect on prolonging the service life of the lime kiln.
As shown in figure 1, the annular passage of the lime kiln consists of an outer wall tightly attached to a kiln shell and an inner wall arranged in a kiln chamber, wherein inner wall bricks are designed into a shape with a large head end and a small tail end as shown in figure 2, and the sides of a plurality of bricks with the same shape are aligned and laid into a ring. One side of interior wall brickwork is equipped with protruding stupefied, and the opposite side is equipped with the recess, and the top surface is equipped with the recess, and the bottom surface is equipped with protruding stupefied, realizes the auto-lock between the same layer brickwork through the mutual interlock of protruding stupefied and recess, improves the interior wall and resists the ability of side thrust. However, included angles between the side face and the end face of the convex edge and included angles between the side face of the convex edge and the side face of the inner wall brick are obtuse angles, the structure has good strength and integrity in a normal temperature environment, when the working temperature rises, the annular inner wall is heated to expand, due to the characteristic that the annular structure is heated to deform, the bricks move outwards along the radial direction, adjacent bricks are far away from each other, the stress direction of the adjacent bricks is shown in a figure 3, two bricks which are originally tightly meshed are separated at the occlusal surface, the self-locking force between the adjacent bricks is reduced, the integrity of the inner wall structure is reduced, the convex edge can directly slide out from the groove, the inner wall is locally damaged, the stress concentration phenomenon at the bottom of the convex edge is serious, and the bricks are easy to break from the bottom of the convex edge. Therefore, in the prior art, under the thermal condition, the steel pipe is easy to loosen and retreat, has poor self-locking effect and low structural strength, and needs to be improved urgently.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a brick for the annular channel of the double-chamber lime kiln, which is simple and practical, has strong self-locking capability, prevents stress concentration and can improve the strength of a masonry structure, and a construction method for masonry by using the brick, which has simple steps and convenient construction.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
the utility model provides a two thorax limekiln annular passage are with laying bricks, the laying bricks includes brick body and mounting, polylith the brick body side meets to build by laying bricks or stones for the annular passage interior wall, and the both sides of brick body all are equipped with the recess, and the recess butt joint of two adjacent brick bodies of layer is fixed passage, fixed passage's internal diameter cooperatees with the external diameter of mounting, and the mounting penetrates fixed passage and cooperates fixedly with it.
As a further improvement of the brickwork for the annular channel of the double-chamber lime kiln:
the length of mounting is not less than the twice of brick body thickness, and two adjacent brick bodies about the mounting through connection.
The brick body is provided with a through hole, and the inner diameter of the through hole is matched with the outer diameter of the fixing piece; and the fixing channel formed by butting two adjacent brick bodies on the same layer is aligned with the through hole on the upper layer brick body and/or the lower layer brick body, and the fixing piece penetrates through the through hole and the fixing channel of the upper and lower adjacent brick bodies and is matched and fixed with the through hole and the fixing channel.
In each layer of brick body, two adjacent fixing pieces are respectively connected between the brick bodies on different layers and the brick body on the layer.
The brick body is the axial symmetry shape, recess and through-hole all set up along symmetry axis symmetry.
The fixing channel and the through hole are both square cross-section holes, and the fixing piece is a bar brick with a square cross section.
The fixing channel and the through hole are both circular cross-section holes, and the fixing piece is a bar brick with a circular cross section.
A construction method for building the annular channel of the double-hearth lime kiln by brickwork comprises the following steps:
s1: laying and building a first layer of brick bodies on the bottom surface of the annular channel inner wall building structure;
s2: the next layer of brick body is constructed in a staggered joint mode, so that each through hole is aligned with each fixing channel of the previous layer of brick body;
s3: building a fixing piece in each group of aligned through holes and fixing channels;
s4: and repeating the steps S2-S3 until the masonry of the annular channel inner wall is completed.
As a further improvement of the construction method:
preparation work is required before laying and building a first layer of brick body, and the method comprises the following steps:
s11: checking the levelness and elevation of the bottom surface of the inner wall masonry structure by using a level gauge, and if the levelness and elevation of the bottom surface of the inner wall masonry structure do not meet the requirements, filling and leveling by using refractory mortar to obtain a horizontal plane A of the bottom surface of the inner wall masonry structure;
s12: searching a horizontal plane B higher than the top of the connecting channel in the kiln chamber by using a level gauge;
s13: welding N supports at equal intervals along the wall surface of the kiln shell on the horizontal plane B, wherein N is equal to the number of bricks in each layer;
s14: a laser emitter is hung on each bracket and naturally droops through gravity, so that the verticality of laser is ensured;
s15: placing a horizontal paperboard on a horizontal plane A, and measuring the distance S between the projection point of each laser on the horizontal paperboard and the central point of the kiln chamber;
s16: adjusting the hanging position of the laser emitter on the support until S is equal to the inner diameter of the annular inner wall, and fixing the mounting position of the laser emitter on the support;
s17: and building a brick body on the plane A, aligning two edges at the inner end of the brick body with two adjacent laser beams, and positioning and building the brick body.
Compared with the prior art, the invention has the advantages that:
the invention provides a brickwork for a double-chamber lime kiln annular channel, wherein grooves are arranged on two sides of a brick body, the grooves of the joint surfaces of two adjacent brick bodies on the same layer are butted to form a fixing channel, the inner diameter of the fixing channel is matched with the outer diameter of a fixing piece, and the fixing piece penetrates through the fixing channel and is matched and fixed with the fixing channel. The brick of laying bricks no longer sets up protruding stupefied on one's body, but bear thrust with groove structure, the recess is compared in protruding stupefied the inside of caving in the brick body, be difficult for receiving destruction, consequently when annular interior wall thermal expansion, the brick body of laying bricks can not appear destroying because of protruding stupefied fracture, the intensity of brick body is higher, structural integrity is more reasonable, the atress performance is stronger, and because the brick body is the structure that acts on and the volume is all great in laying bricks, the difficult destruction of brick body also is favorable to laying bricks and makes and save the material in the maintenance process. According to the invention, the original convex edge is stressed by the single fixing piece, so that the bent angle in the stressed part is less, the stressed defect area is small, the phenomena of stress concentration and the like are avoided to a great extent, the connection strength is higher, and the service life of the whole kiln is prolonged.
The construction method for building by adopting the brickwork also has the advantages of simple steps, convenient construction, easy operation of operators and the like. Furthermore, because the annular channel of the double-chamber lime kiln has very bad working conditions, the construction precision requirements such as verticality and roundness of the bricklaying structure are very high, the radius error of the kiln chamber is too large, the stress between the same-layer bricklaying is uneven, and the structural strength of the annular channel is seriously reduced. The construction method of the invention adopts naturally drooping laser as assistance, can accurately control the verticality of the bricklaying structure, and can effectively control the roundness by adopting a mode of laser and horizontal paperboard, thereby ensuring the structural strength of the annular channel and improving the stress uniformity of the masonry structure.
Drawings
FIG. 1 is a schematic structural diagram of the arrangement position of an annular channel in a double-hearth lime kiln;
FIG. 2 is a schematic structural diagram of bricklaying of a prior lime kiln;
FIG. 3 is a schematic diagram of the stress condition of the brick laying of the existing lime kiln;
FIG. 4 is a schematic structural diagram of brickwork for the annular passage of the double-hearth lime kiln of embodiment 1;
FIG. 5 is a schematic view showing the connection structure of brickwork for the annular passage of the double-hearth lime kiln of example 1;
FIG. 6 is a view from A-A in FIG. 5;
FIG. 7 is a schematic structural diagram of brickwork for the annular passage of the double-hearth lime kiln of embodiment 2.
Illustration of the drawings: 1. building bricks; 11. a brick body; 111. a groove; 112. a through hole; 12. and a fixing member.
Detailed Description
In order to facilitate an understanding of the invention, the invention will be described more fully and in detail below with reference to the accompanying drawings and preferred embodiments, but the scope of the invention is not limited to the specific embodiments below.
Example 1:
as shown in fig. 4 and 5, the brickwork for the annular channel of the double-chamber lime kiln of the embodiment comprises a brick body 11 and a fixing piece 12, wherein the side surfaces of a plurality of brick bodies 11 are connected and bricked to form an inner wall of the annular channel, both sides of the brick bodies 11 are provided with grooves 111, the grooves 111 of the connecting surfaces of two adjacent brick bodies 11 on the same layer are connected to form a fixing channel, the inner diameter of the fixing channel is matched with the outer diameter of the fixing piece 12, and the fixing piece 12 penetrates through the fixing channel and is matched and fixed with the fixing channel.
The brick of laying bricks 1 of this embodiment no longer sets up protruding stupefied on 11, but bear thrust with recess 111 structure, recess 111 is compared in protruding stupefied the inside of caving in brick body 11, be difficult for receiving destruction, consequently when annular interior wall thermal expansion, the brick body 11 of laying bricks 1 can not appear destroying because of protruding stupefied fracture, brick body 11's intensity is higher, structural integrity is more reasonable, the atress performance is stronger, when destruction appears in mounting 12, only change mounting 12 can, brick body 11 is the equal great structure of effect and volume in the brick of laying bricks 1, brick body 11 is indestructible also is favorable to the brick of laying bricks 1 to make and the material is saved with the maintenance in-process festival. The embodiment replaces the original convex edge stress with the independent fixing piece 12, so the broken angle existing in the stress part is less, the stress defect area is small, the phenomena of stress concentration and the like are avoided to a great extent, the connection strength is higher, and the service life of the whole kiln is prolonged.
In this embodiment, the length of the fixing member 12 is not less than twice the thickness of the brick body 11, and the fixing member 12 is connected to two adjacent brick bodies 11 up and down in a penetrating manner. This kind of setting up mode makes mounting 12 not only can play and replaces protruding stupefied bearing lateral thrust and lock the effect of laying bricks 1 on the same layer of adjacent, can also play the effect of the different layer of laying bricks 1 of locking connection, solitary mounting 12 just can play two-way locking effect promptly, has consequently simplified 1 structure of laying bricks, has removed the protruding stupefied process of processing 1 bottom of laying bricks and protruding stupefied of side from, has more reduced the required precision of the construction of laying bricks by laying bricks or stones, saves a large amount of manpower and materials.
In this embodiment, the brick body 11 is provided with a through hole 112, and the inner diameter of the through hole 112 is matched with the outer diameter of the fixing member 12; the brick body 11 of the brickwork 1 adopts a staggered joint arrangement structure during brickwork, namely, in two layers of brickwork 1 which are adjacent up and down, a fixing channel formed by butting the brick body 11 of one layer is aligned with a through hole 112 of the brick body 11 of the other layer, and then the fixing piece 12 penetrates through the through hole 112 and the fixing channel of the brick body 11 which is adjacent up and down and is matched and fixed with the fixing channel. Compare in every layer of brick body 11 all align to arrange, this kind of arrangement has broken the seam between the brick body 11 for the firm degree of annular interior wall that brick 1 built by laying bricks or stones obtained is higher, prolongs the holistic life of kiln. In other embodiments, the arrangement of each course of bricks 1 may also be adopted, that is, between the upper and lower courses of bricks 11, the through holes 112 are aligned with the through holes 112, and the fixing channels are aligned with the fixing channels, but the stability of the arrangement is lower than that of the embodiment, and details are not described herein.
In this embodiment, as shown in fig. 6, in each layer of brick body 11, two adjacent fixing pieces 12 are respectively connected between the brick body 11 of a different layer and the brick body 11 of the layer, that is, one of the two adjacent fixing pieces 12 connects the brick body 11 of the layer and the brick body 11 of the upper layer, and the other connects the brick body 11 of the layer and the brick body 11 of the lower layer. The setting mode utilizes the fixing piece 12 to break gaps among different layers of the brick bodies 11, so that the stability degree of the annular inner wall obtained by building the brick 1 is further higher, and the service life of the whole kiln is prolonged.
In this embodiment, the brick body 11 is axisymmetric, and the recess 111 and the through-hole 112 are all set up along symmetry axis symmetry to guarantee that the brick body 11 can be forced evenly, further improve the atress performance of brick body 11.
In this embodiment, the fixing channel and the through hole 112 are both square cross-section holes, and the fixing member 12 is a bar brick with a square cross section, which is beneficial to locking between the fixing channel and the through hole 112 and the fixing member 12, and prevents the annular inner wall from being heated to cause separation between the brickwork 1. In other embodiments, different cross-sectional shapes may be selected according to the use situation, or pouring and molding by pouring refractory castable, and the like are adopted, which is not described herein again.
The embodiment also provides a construction method for building the annular channel of the double-hearth lime kiln by using brickwork, which also has the advantages, and in addition, the construction method also has the advantages of simple steps, convenient construction, easy operation of operators and the like, and the steps comprise:
s1: laying a first layer of brick body 11 on the bottom surface of the annular channel inner wall masonry structure;
because the annular channel of two thorax limekilns department operating mode is very abominable, to here the construction precision requirements such as the straightness that hangs down and the circularity of brickwork 1 structure very high, the kiln thorax radius error is too big, can lead to between the layer brickwork 1 atress inhomogeneous, seriously reduces annular channel structural strength. Therefore, before laying, the following preparation should be made:
s11: checking the levelness and elevation of the bottom surface of the inner wall masonry structure by using a level gauge, and if the levelness and elevation of the bottom surface of the inner wall masonry structure do not meet the requirements, filling and leveling by using refractory mortar to obtain a horizontal plane A of the bottom surface of the inner wall masonry structure;
s12: searching a horizontal plane B higher than the top of the connecting channel in the kiln chamber by using a level gauge;
s13: welding N supports at equal intervals along the wall surface of the kiln shell on the horizontal plane B, wherein N is equal to the number of 1 brickwork in each layer;
s14: a laser emitter is hung on each bracket and naturally droops through gravity, so that the verticality of laser is ensured;
s15: placing a horizontal paperboard on a horizontal plane A, and measuring the distance S between the projection point of each laser on the horizontal paperboard and the central point of the kiln chamber;
s16: adjusting the hanging position of the laser emitter on the support until S is equal to the inner diameter of the annular inner wall, and fixing the mounting position of the laser emitter on the support;
s17: building a brick body 11 on the plane A, aligning two edges at the inner end of the brick body 11 with two adjacent laser beams, and building after positioning the brick body 11;
above-mentioned preparation work has adopted the flagging laser of nature as supplementary to pinpoint the position of laying bricks 1, can the straightness that hangs down of 1 structure of accurate control laying bricks, the mode that adopts laser to add horizontal cardboard can effective control true circularity, thereby has guaranteed annular passage's structural strength, has improved the atress homogeneity of 1 structure of laying bricks.
S2: building the next layer of brick body 11 in a staggered joint manner, and aligning each through hole 112 with each fixing channel of the previous layer of brick body 11; for example, when a second layer of brick body 11 is built, the second layer of brick body 11 rotates for a certain angle relative to the first layer of brick body 11, so that the side edge of the second layer of brick body 11 is overlapped with the central line of the first layer of brick body 11, the central line of the tail end of the second layer of brick body 11 is aligned with the laser beam, and the brick body 11 is built after being positioned;
s3: laying the fastener 12 in each set of aligned through holes 112 and fastening channels;
s4: and repeating the steps S2-S3 until the masonry of the annular channel inner wall is completed.
Example 2:
this embodiment is substantially the same as embodiment 1, except that in this embodiment, as shown in fig. 7, the fixing passage and the through hole 112 are both circular cross-section holes, and the fixing member 12 is a bar having a circular cross-section. The round section is adopted to replace the square section, so that the stress concentration at the edges of the cavities and the fixing pieces 12 can be effectively improved, and the structural strength of the bricklaying 1 is further improved.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-described embodiments. It should be apparent to those skilled in the art that modifications and variations can be made without departing from the technical spirit of the present invention.
Claims (9)
1. The utility model provides a two thorax limekiln ring channel are with brickwork which characterized in that: brickwork (1) includes brick body (11) and mounting (12), polylith brick body (11) side meets to build by laying bricks or stones for the annular channel interior wall, and the both sides of brick body (11) all are equipped with recess (111), and recess (111) butt joint of two adjacent brick bodies (11) looks interfaces on the same floor is fixed passage, fixed passage's internal diameter cooperatees with the external diameter of mounting (12), and mounting (12) penetrate fixed passage and cooperate fixedly with it.
2. The brickwork for the annular channel of the double-chamber lime kiln according to claim 1, characterized in that: the length of the fixing piece (12) is not less than twice of the thickness of the brick body (11), and the fixing piece (12) is connected with the two brick bodies (11) which are adjacent up and down in a penetrating mode.
3. The brickwork for the annular channel of the double-chamber lime kiln as claimed in claim 2, wherein: a through hole (112) is formed in the brick body (11), and the inner diameter of the through hole (112) is matched with the outer diameter of the fixing piece (12); the fixing channel formed by butting two adjacent brick bodies (11) on the same layer is aligned with the through hole (112) on the upper layer brick body (11) and/or the lower layer brick body (11), and the fixing piece (12) penetrates through the through hole (112) of the upper and lower adjacent brick bodies (11) and is matched and fixed with the fixing channel.
4. The brickwork for the annular channel of the double-hearth lime kiln according to claim 2 or 3, characterized in that: in each layer of brick body (11), two adjacent fixing pieces (12) are respectively connected between the brick bodies (11) in different layers and the brick body (11) in the layer.
5. The brickwork for the annular channel of the double-chamber lime kiln according to claim 3, characterized in that: the brick body (11) is in an axisymmetric shape, and the groove (111) and the through hole (112) are symmetrically arranged along the symmetry axis.
6. The brickwork for the annular channel of the double-chamber lime kiln according to claim 3, characterized in that: the fixing channel and the through hole (112) are both square cross-section holes, and the fixing piece (12) is a bar brick with a square cross section.
7. The brickwork for the annular channel of the double-chamber lime kiln according to claim 3, characterized in that: the fixing channel and the through hole (112) are both holes with circular cross sections, and the fixing piece (12) is a bar brick with a circular cross section.
8. A construction method for bricking the annular passage of the double-hearth lime kiln according to any one of claims 3 to 7, comprising the steps of:
s1: laying and building a first layer of brick bodies (11) on the bottom surface of the masonry structure of the inner wall of the annular channel;
s2: the next layer of brick body (11) is constructed in a staggered joint mode, so that each through hole (112) is aligned with each fixing channel of the previous layer of brick body (11);
s3: laying the fasteners (12) in each set of aligned through holes (112) and fastener channels;
s4: and repeating the steps S2-S3 until the masonry of the annular channel inner wall is completed.
9. The construction method according to claim 8, wherein: preparation work is required before laying and building a first layer of brick body (11), and the method comprises the following steps:
s11: checking the levelness and elevation of the bottom surface of the inner wall masonry structure by using a level gauge, and if the levelness and elevation of the bottom surface of the inner wall masonry structure do not meet the requirements, filling and leveling by using refractory mortar to obtain a horizontal plane A of the bottom surface of the inner wall masonry structure;
s12: searching a horizontal plane B higher than the top of the connecting channel in the kiln chamber by using a level gauge;
s13: on the horizontal plane B, N supports are welded at equal intervals along the wall surface of the kiln shell, wherein N is equal to the number of each layer of bricks (1);
s14: a laser emitter is hung on each bracket and naturally droops through gravity, so that the verticality of laser is ensured;
s15: placing a horizontal paperboard on a horizontal plane A, and measuring the distance S between the projection point of each laser on the horizontal paperboard and the central point of the kiln chamber;
s16: adjusting the hanging position of the laser emitter on the support until S is equal to the inner diameter of the annular inner wall, and fixing the mounting position of the laser emitter on the support;
s17: and (3) building a brick body (11) on the plane A, aligning two edges at the inner end of the brick body (11) with two adjacent laser beams, and positioning and building the brick body.
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| CN112033162A (en) * | 2020-09-14 | 2020-12-04 | 北京嘉永会通能源科技有限公司 | Masonry structure for industrial furnace channel |
| CN114353506A (en) * | 2022-01-27 | 2022-04-15 | 中冶长天国际工程有限责任公司 | Annular channel structure for double-chamber lime kiln |
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| CN114538800A (en) * | 2022-02-28 | 2022-05-27 | 中冶长天国际工程有限责任公司 | Annular channel structure for double-chamber lime kiln and building method thereof |
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| CN114368921A (en) * | 2022-01-27 | 2022-04-19 | 中冶长天国际工程有限责任公司 | Annular channel structure for double-chamber lime kiln and double-chamber lime kiln |
| CN114353506B (en) * | 2022-01-27 | 2023-06-23 | 中冶长天国际工程有限责任公司 | Annular channel structure for double-chamber lime kiln |
| CN114538800A (en) * | 2022-02-28 | 2022-05-27 | 中冶长天国际工程有限责任公司 | Annular channel structure for double-chamber lime kiln and building method thereof |
| CN114538800B (en) * | 2022-02-28 | 2022-10-18 | 中冶长天国际工程有限责任公司 | Annular channel structure for double-chamber lime kiln and building method thereof |
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