Bracket type double-chamber lime kiln with novel annular channel
By adding lateral support and enlarging the foundation, combined with the use of refractory castables and prefabricated blocks, the problem of instability of the inner wall structure of the ring-shaped passage of the bell leg double-bore lime kiln is solved, and the service life and construction efficiency of the kiln are improved.
Patent Information
- Application Number
- CN202420500876.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-15
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-03-15
AI Technical Summary
The inner wall structure of the ring-shaped passage of the traditional beef leg double-bore lime kiln is prone to displacement and collapse during its service period, resulting in the problem of having to stop the furnace for maintenance. It is mainly due to the insufficient lateral support structure that cannot effectively resist the lateral thrust of the limestone in the kiln.
Add lateral support for the annular passage and increase the foundation of the inner wall. By building vertical walls on the top of the ox leg and setting up transverse support beams between every two adjacent ox leg, combined with welding anchors or fire resistance with anchors Prefabricated blocks form a more stable structure and fill refractory castable between the support beam and the outer wall of the inner wall to enhance the support effect.
Effectively resist the lateral thrust in the kiln, avoid the movement and collapse of the wall bricks inside the annular passage, improve the service life and structural stability of the lime kiln, and reduce the construction difficulty and risk.
Smart Images
Figure CN222182128U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of lime kilns, in particular to a bull leg type double-chamber lime kiln with a novel annular channel. Background Art
[0002] The double-chamber lime kiln is increasingly being used to replace the original single-chamber lime kiln because it adopts advanced technologies such as parallel flow calcination, alternating ignition and calcination of the two kiln chambers, and multi-point fuel injection by a spray gun, which makes the lime calcined evenly, highly active, with high output and high heat utilization rate.
[0003] Double-chamber lime kilns are divided into two types according to the support method of the inner wall of the annular channel: the bracket type and the hanging cylinder type. The bracket type double-chamber lime kiln has a layer of refractory materials built inside the kiln chamber as the kiln chamber lining that is in direct contact with limestone and flames. The refractory kiln chamber lining structure is divided into the following parts from bottom to top: cooling zone, bracket, arch bridge and arch foot, inner and outer walls of the annular channel, top of the annular channel, connecting channel side walls and top, calcining zone, preheating zone, and feeding zone. Among them, the arch foot, inner wall of the annular channel, outer wall of the annular channel, and top of the annular channel together constitute the structure of the annular channel, which is the refractory kiln chamber lining area with the most complex structure and the most prone to damage in the bracket type double-chamber lime kiln.
[0004] In order to maintain the stability of the annular channel, lateral supports are generally built on the top of the corbels, between the arch feet and the outside of the lowest bricks of the inner wall of the annular channel, and between the outer walls of the annular channel to resist the horizontal lateral thrust from the limestone in the kiln.
[0005] The above-mentioned traditional lateral support structure has the following disadvantages. Since the traditional lateral support structure only exists on the top of the corbel, it is too low for the inner wall of the annular channel and cannot ensure the stability of the entire inner wall structure of the annular channel during the entire service life. The inner wall bricks of the annular channel often shift. In severe cases, bricks fall into the annular channel, causing the inner wall of the annular channel to collapse, and the furnace has to be stopped for maintenance. Utility Model Content
[0006] The purpose of the utility model is to provide a bull leg type double-chamber lime kiln with a novel annular channel, which effectively solves the problems raised in the above background technology.
[0007] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions.
[0008] A corbel-type double-chamber lime kiln with a novel annular channel comprises a corbel, an arch bridge and an arch foot, an inner wall of the annular channel, an outer wall of the annular channel and a top of the annular channel, wherein the arch bridge and the arch foot are located at the top of the corbel, the inner wall of the annular channel is arranged above the arch bridge and the arch foot, the outer wall of the annular channel is arranged at the periphery of the inner wall of the annular channel, the top of the annular channel is arranged above the area surrounded by the inner wall of the annular channel and the outer wall of the annular channel, a furnace is formed inside the inner wall of the annular channel, and an annular channel is formed between the outer wall of the inner wall of the annular channel, the inner wall of the outer wall of the annular channel, the arch bridge and the arch foot and the top of the annular channel, a vertical wall is synchronously built from the top of one of the corbels to the top of the annular channel in each furnace, the vertical wall is located in the annular channel, and is supported and connected to the inner wall of the annular channel and the outer wall of the annular channel respectively, a transverse support beam is provided at the middle position of the height of the annular channel and between every two adjacent corbels to increase the foundation of the inner wall of the annular channel.
[0009] It can be seen that the utility model increases the lateral support of the annular channel and increases the foundation of the inner wall of the annular channel, so that the inner wall of the annular channel can better resist the horizontal lateral thrust from the limestone in the kiln, thereby avoiding the problem that the bricks of the inner wall of the annular channel gradually move outward and fall into the annular channel in serious cases, causing the collapse of the inner wall of the annular channel, thereby improving the stability of the inner wall of the annular channel and thereby increasing the service life of the lime kiln.
[0010] Furthermore, the transverse support beam can be constructed by first welding anchors and then setting up formwork for vibrating the pouring material, or by directly welding refractory prefabricated blocks with anchors to the kiln shell.
[0011] The method of welding anchors first and then supporting the formwork for vibrating the pouring material can flexibly design and adjust the shape and support structure of the formwork according to the specific situation. During construction, the shape and size of the pouring material can be effectively controlled through the support and anchoring of the formwork, and the construction quality can be improved. The welding of anchors can provide more solid support and enhance the stability and safety of the structure. The refractory prefabricated blocks with anchors are directly welded to the kiln shell. The refractory prefabricated blocks are made in the factory in advance, and only need to be welded directly to the shell on site, eliminating the formwork construction and the vibrating construction process of the pouring material, greatly improving the construction speed. Direct welding of refractory prefabricated blocks reduces manual operation and the process of building supporting formwork, reducing the difficulty and risk of construction. The welding of prefabricated blocks and shells forms an integrated structure with good stability and durability.
[0012] Furthermore, a filling gap is provided between the transverse support beam and the inner and outer walls of the annular channel, and the filling gap is filled with refractory castables.
[0013] Refractory castables have the characteristics of high temperature resistance, chemical corrosion resistance, thermal shock resistance, etc. Filling the filling gap between the transverse support beam and the inner wall of the annular channel with refractory castables further improves the protection effect of the inner wall of the annular channel.
[0014] Furthermore, a connecting channel is provided on the side of the inner wall of the annular channel, and the connecting channel is used to connect the furnace and the inner chamber of the furnace body on the other side.
[0015] The connecting channel allows the hot air flow from one kiln chamber to be transferred to another kiln chamber, thereby achieving the effect of heat transfer between the two lime kiln chambers and preheating the limestone.
[0016] Furthermore, a vertical wall is built on one side of the furnace facing the connecting passage.
[0017] By arranging the vertical wall on the side facing the connecting channel, the supporting part of the inner wall of the annular channel is symmetrical with the connecting channel, thereby improving the overall supporting effect of the inner wall of the annular channel without affecting the ventilation function of the annular channel.
[0018] Furthermore, an expansion gap is provided between the top of the vertical wall and the top of the annular channel.
[0019] Due to thermal expansion and contraction in the lime kiln under high temperature conditions, this will cause deformation and stress accumulation in the structure. Expansion joints can allow the vertical walls to expand and contract freely when the structure deforms due to thermal expansion, thereby reducing the stress associated with thermal expansion.
[0020] Compared with the prior art, the beneficial effects of the present invention are as follows.
[0021] The utility model increases the lateral support of the annular channel and enlarges the foundation of the inner wall of the annular channel, so that the inner wall of the annular channel can better resist the horizontal lateral thrust from the limestone in the kiln, avoids the problem that the bricks of the inner wall of the annular channel gradually move outward and fall into the annular channel in serious cases, causing the inner wall of the annular channel to collapse, improves the stability of the inner wall of the annular channel, and further increases the service life of the lime kiln. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 The overall plan view of the bull leg type double-chamber lime kiln with a novel annular channel provided by the utility model;
[0023] Figure 2 for Figure 1 Schematic diagram of the cross-section structure of the middle AA section.
[0024] In the figure: 01, furnace; 02, annular channel; 03, expansion gap; 04, filling gap; 1, corbel; 2, arch bridge and arch foot; 3, inner wall of annular channel; 4, outer wall of annular channel; 5, top of annular channel; 6, vertical wall; 7, horizontal support beam; 8, connecting channel; 9, refractory castable. DETAILED DESCRIPTION
[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0026] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms, "connection" and "installation" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. In addition, "connection" can be a direct connection or an indirect connection through an intermediate medium. Among them, "fixed" means that they are connected to each other and the relative position relationship after connection remains unchanged. The directional terms mentioned in the embodiments of the present utility model, such as "inside", "outside", "top", "bottom", etc., are only reference to the directions of the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present utility model, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present utility model.
[0027] In the embodiments of the present invention, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.
[0028] See also Figure 1-Figure 2The utility model provides a corbel-type double-chamber lime kiln with a novel annular channel, comprising a corbel 1, an arch bridge and an arch foot 2, an annular channel inner wall 3, an annular channel outer wall 4 and an annular channel top 5, the arch bridge and the arch foot 2 are located on the top of the corbel 1, the annular channel inner wall 3 is arranged above the arch bridge and the arch foot 2, the annular channel outer wall 4 is arranged on the periphery of the annular channel inner wall 3, the annular channel top 5 is arranged above the area surrounded by the annular channel inner wall 3 and the annular channel outer wall 4, the annular channel inner wall 3 forms a furnace 01, the outer wall of the annular channel inner wall 3, the inner wall of the annular channel outer wall 4, the arch bridge and An annular channel 02 is formed between the arch foot 2 and the top 5 of the annular channel. In each furnace 01, a vertical wall 6 is synchronously built on the top of one of the corbels 1 until the top 5 of the annular channel. The vertical wall 6 is located in the annular channel 02 and is supported and connected to the inner wall 3 and the outer wall 4 of the annular channel respectively. A transverse support beam 7 is provided at the middle position of the height of the annular channel 02 and between every two adjacent corbels 1. The thickness of the arch bridge and the arch foot 2 along the diameter direction of the furnace 01 is 50-300mm greater than the thickness of the inner wall 3 of the annular channel, and the foundation of the inner wall 3 of the annular channel is increased.
[0029] The utility model improves the supporting effect of the inner wall 3 of the annular channel by simultaneously building a vertical wall 6 on top of one of the corbels 1 in each furnace until the top 5 of the annular channel. By providing a transverse support beam 7 at the middle position of the height of the annular channel 02 and between every two adjacent corbels 1, it can further provide support for the inner wall 3 of the annular channel. At the same time, the supporting part below the inner wall 3 of the annular channel is widened to reduce the pressure of the inner wall 3 of the annular channel on the lower foundation, thereby improving the stability of the inner wall 3 of the annular channel and its lower foundation. The utility model increases the transverse support of the annular channel 02 and increases the foundation of the inner wall 3 of the annular channel, so that the inner wall 3 of the annular channel can better resist the horizontal lateral thrust from the limestone in the kiln, avoids the problem that the bricks of the inner wall of the annular channel 02 gradually move outward, which may cause the bricks to fall into the annular channel 02 and cause the inner wall 3 of the annular channel to collapse in severe cases, thereby improving the stability of the inner wall 3 of the annular channel and thereby improving the service life of the lime kiln.
[0030] Specifically, the transverse support beam 7 can be constructed by first welding anchors and then supporting the template for vibrating the castable material, or by directly welding the refractory prefabricated blocks with anchors on the kiln shell. By first welding anchors and then supporting the template for vibrating the castable material, the shape and supporting structure of the template can be flexibly designed and adjusted according to the specific situation. During construction, the shape and size of the castable can be effectively controlled by supporting and anchoring the template, and the construction quality can be improved. The welding of anchors can provide a more solid support and enhance the stability and safety of the structure. By directly welding the refractory prefabricated blocks with anchors on the kiln shell, the refractory prefabricated blocks are made in advance in the factory, and only need to be directly welded to the shell on site, which saves the template construction and the vibrating construction process of the castable material, greatly improving the construction speed. Directly welding the refractory prefabricated blocks reduces the manual operation and the process of building the supporting template, reducing the construction difficulty and risk. The welding of the prefabricated blocks and the shell forms an integrated structure with good stability and durability.
[0031] Specifically, there is a filling gap 04 between the transverse support beam 7 and the outer wall of the inner wall 3 of the annular channel, and the filling gap 04 is filled with a refractory castable 9. The refractory castable 9 is usually made of special refractory material particles and powders, adhesives and additives mixed in a certain formula ratio, and has the characteristics of high temperature resistance, chemical corrosion resistance, thermal shock resistance, etc. The filling gap 04 between the transverse support beam 7 and the inner wall 3 of the annular channel is filled with the refractory castable 9, which further improves the protection effect of the inner wall 3 of the annular channel.
[0032] Specifically, a connecting channel 8 is provided on the side of the inner wall 3 of the annular channel, and the connecting channel 8 is used to connect the furnace 01 with the inner furnace of the other side. The hot air flow from combustion can be transferred from one kiln chamber to another kiln chamber through the connecting channel 8, so as to achieve the effect of heat transfer between the two lime kiln chambers and preheating the limestone.
[0033] Specifically, in the furnace 01, the vertical wall 6 is built on the side of the furnace 01 facing the connecting channel 8. By arranging the vertical wall 6 on the side facing the connecting channel 8, the supporting part of the inner wall 3 of the annular channel is symmetrically distributed with the connecting channel 8, thereby improving the overall supporting effect of the inner wall 3 of the annular channel.
[0034] Specifically, there is an expansion gap 03 between the top of the vertical wall 6 and the top of the annular channel 5. Due to thermal expansion and contraction in the lime kiln under high temperature conditions, this will cause deformation and stress accumulation of the structure. The expansion gap 03 can allow the vertical wall 6 to expand and contract freely when the structure is deformed due to thermal expansion, thereby reducing the stress related to thermal expansion.
[0035] Embodiment 1
[0036] This embodiment provides a masonry process for a lime kiln, as follows:
[0037] The refractory material of the lime kiln chamber is laid from bottom to top. When the corbel 1 is laid, the arch bridge and the arch foot 2 are laid on the top of the corbel 1, so that the width of the arch bridge and the arch foot 2 is 100mm larger than the width of the inner wall 3 of the upper annular channel;
[0038] When the inner wall 3 of the annular channel is being built, a vertical wall 6 is simultaneously built in the middle position opposite to the connecting channel 8, between the inner wall 3 of the annular channel and the outer wall 4 of the annular channel, and on top of the arch bridge and the arch foot 2 until below the top 5 of the annular channel;
[0039] When the outer wall 4 of the annular channel is built, a transverse support beam 7 is arranged at the middle position of the height of the annular channel 02, the middle position between every two adjacent corbels 1, and between the inner wall 3 of the annular channel and the outer wall 4 of the annular channel. When the transverse support beam 7 is built, an anchor is first welded on the outer wall of the kiln chamber, and then a template is set up, and a casting material is used for vibration construction. After the casting material solidifies, the template is removed, and the filling gap 04 between the transverse support beam 7 and the inner wall 3 of the annular channel is filled with a refractory casting material 9;
[0040] Continue to build the outer wall 4 of the annular channel of the lime kiln, the top 5 of the annular channel, the connecting channel 8, the calcining zone, the preheating zone and the feeding zone;
[0041] After the refractory kiln chamber is completely built, the furnace can be baked according to the furnace baking system.
[0042] Embodiment 2
[0043] This embodiment provides another masonry process of a lime kiln, as follows:
[0044] The refractory material of the lime kiln chamber is laid from bottom to top. When the corbel 1 is laid, the arch bridge and the arch foot 2 are laid on the top of the corbel 1, so that the width of the arch bridge and the arch foot 2 is 150mm larger than the width of the inner wall 3 of the upper annular channel;
[0045] When the inner wall 3 of the annular channel is being built, a vertical wall 6 is simultaneously built in the middle position opposite to the connecting channel 8, between the inner wall 3 of the annular channel and the outer wall 4 of the annular channel, and on top of the arch bridge and the arch foot 2 until below the top 5 of the annular channel;
[0046] When the outer wall 4 of the annular channel is built, a transverse support beam 7 is arranged at the middle position of the height of the annular channel 02, the middle position between every two adjacent corbels 1, and between the inner wall 3 of the annular channel and the outer wall 4 of the annular channel. The transverse support beam 7 adopts a refractory prefabricated block with anchors. This prefabricated block is produced in advance in a refractory material factory, and after being transported to the construction site, it is directly welded to the kiln shell from the exposed anchors. The filling gap 04 between the transverse support beam 7 and the inner wall 3 of the annular channel is filled with refractory castable 9;
[0047] Continue to build the outer wall 4 of the annular channel of the lime kiln, the top 5 of the annular channel, the connecting channel 8, the calcining zone, the preheating zone and the feeding zone;
[0048] After the refractory kiln chamber is completely built, the furnace can be baked according to the furnace baking system.
[0049] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.
Claims
1. A bull leg type double-chamber lime kiln with a new type of annular channel, characterized in that: The invention comprises a corbel (1), an arch bridge and an arch foot (2), an inner wall of an annular channel (3), an outer wall of an annular channel (4) and an annular channel top (5), wherein the arch bridge and the arch foot (2) are located at the top of the corbel (1), the inner wall of the annular channel (3) is arranged above the arch bridge and the arch foot (2), the outer wall of the annular channel (4) is arranged at the periphery of the inner wall of the annular channel (3), and the top of the annular channel (5) is arranged above the area enclosed by the inner wall of the annular channel (3) and the outer wall of the annular channel (4); A furnace (01) is formed inside the inner wall (3) of the annular channel, and an annular channel (02) is formed between the outer wall of the inner wall (3) of the annular channel, the inner wall of the outer wall (4) of the annular channel, the arch bridge and the arch foot (2) above, and the top (5) of the annular channel; A vertical wall (6) is synchronously built on top of one of the corbels (1) in each furnace (01) until the top (5) of the annular channel, wherein the vertical wall (6) is located in the annular channel (02) and is respectively supported and connected to the inner wall (3) of the annular channel and the outer wall (4) of the annular channel; A transverse support beam (7) is provided at a middle position of the height of the annular channel (02) and between every two adjacent corbels (1); The thickness of the arch bridge and the arch foot (2) along the diameter direction of the furnace (01) is 50-300 mm greater than the thickness of the inner wall (3) of the annular channel, and the foundation of the inner wall (3) of the annular channel is increased.
2. A bull leg type double-chamber lime kiln with a novel annular channel according to claim 1, characterized in that: The transverse support beam (7) can be constructed by first welding anchors and then setting up a formwork for vibrating the pouring material, or by directly welding a refractory prefabricated block with anchors to the kiln shell.
3. A bull leg type double-chamber lime kiln with a novel annular channel according to claim 1, characterized in that: A filling gap (04) is provided between the transverse support beam (7) and the outer wall of the inner wall (3) of the annular channel, and the filling gap (04) is filled with refractory castable (9).
4. A bull leg type double-chamber lime kiln with a novel annular channel according to claim 1, characterized in that: A connecting channel (8) is provided on the side of the inner wall (3) of the annular channel, and the connecting channel (8) is used to connect the furnace (01) with the inner chamber of the furnace body on the other side.
5. A bull leg type double-chamber lime kiln with a novel annular channel according to claim 4, characterized in that: The vertical wall (6) is built on one side of the furnace (01) facing the connecting passage (8).
6. A bull leg type double-chamber lime kiln with a novel annular channel according to claim 1, characterized in that: An expansion gap (03) is provided between the top of the vertical wall (6) and the top of the annular channel (5).