Bracket type double-chamber lime kiln with novel arch bridge

Abstract

The utility model relates to a corbel type double-chamber lime kiln with a novel arch bridge, which comprises a corbel, a double-layer horizontal arch bridge and an annular channel inner wall, the double-layer horizontal arch bridge is built on the upper side of the corbel, and the annular channel inner wall is built on the upper side of the double-layer horizontal arch bridge; the double-layer horizontal arch bridge comprises a horizontal arch bridge lower layer and a horizontal arch bridge upper layer, the horizontal arch bridge lower layer and the horizontal arch bridge upper layer are both built by refractory bricks, grooves are formed in the upper sides of the refractory bricks in the horizontal arch bridge lower layer and the horizontal arch bridge upper layer, protrusions are arranged on the inner wall of the annular channel and the bottom of the horizontal arch bridge upper layer, and the grooves are matched with the protrusions. The double-layer horizontal arch bridge replaces a traditional arch bridge structure, arch foot bricks, an arch bridge and a flat returning layer are not needed any more, the occlusion effect is achieved through the grooves and the protrusions, the stability of the arch bridge and the inner wall of the annular channel is improved, and the service life of the lime kiln is prolonged.

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 arch bridge. 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, calcination zone, preheating zone, and feeding zone. Among them, the bracket, arch bridge and arch foot, inner wall of the annular channel, and top of the annular channel are the refractory kiln chamber lining areas with the most complex structure and the most prone to damage in the bracket-type double-chamber lime kiln, while the arch bridge and arch foot are located on the upper part of the bracket, directly supporting the inner wall and top of the annular channel, and are the most core parts of the entire lime kiln refractory kiln chamber lining.

[0004] At present, arch bridges and arch feet are generally built with fired refractory bricks. The arch foot is located on the top of the corbel, and the arch bridge is located between two adjacent arch feet. After the arch bridge is built, it is an upward arch. Ramming material or castable material is used to level the top of the arch foot of the arch bridge, that is, a leveling layer is set on the top of the arch foot of the arch bridge, and then the inner wall of the annular channel is built upward from the leveling layer. This arched arch bridge structure has the following disadvantages:

[0005] There is no interlocking structure between the leveling layer and the arch foot of the arch bridge, and between the leveling layer and the inner wall bricks of the upper annular channel. The leveling layer and the inner wall of the annular channel are subjected to horizontal thrust from the limestone in the kiln. The leveling layer and the inner wall bricks of the annular channel gradually move into the annular channel. In severe cases, they fall into the annular channel, causing the collapse of the inner wall of the annular channel.

[0006] The arch foot, leveling layer, and inner wall of the annular passage built in the above manner, in many kiln chambers, the leveling layer was damaged, bricks fell off the inner wall of the annular passage after 6-12 months of use, and then the inner wall of the annular passage collapsed, necessitating the furnace to be shut down for maintenance. Utility Model Content

[0007] The utility model aims to provide a corbel type double-chamber lime kiln with a novel arch bridge, which can improve the stability of the arch bridge and the inner wall of the annular channel and thus increase the service life of the lime kiln.

[0008] To achieve the above-mentioned purpose, the technical solution of the utility model is as follows.

[0009] A corbel-type double-chamber lime kiln with a novel arch bridge comprises a corbel, a double-layer horizontal arch bridge and an inner wall of an annular channel, the upper side of the corbel is built with a double-layer horizontal arch bridge, and the upper side of the double-layer horizontal arch bridge is built with an inner wall of an annular channel. The double-layer horizontal arch bridge comprises a lower horizontal arch bridge layer and an upper horizontal arch bridge layer, both of which are built with refractory bricks, and grooves are provided on the upper sides of the refractory bricks in the lower horizontal arch bridge layer and the upper horizontal arch bridge layer, and protrusions are provided at the bottom of the inner wall of the annular channel and the upper horizontal arch bridge layer, and the grooves are matched with the protrusions.

[0010] It can be seen that the setting of the double-layer horizontal arch bridge replaces the traditional bow-shaped arch bridge structure, and the arch foot bricks, bow-shaped arch bridge, and return leveling layer are no longer needed. The setting of grooves and protrusions plays a bite effect, which solves the problem that the bite structure cannot be set between the return leveling layer and the arch foot of the arch bridge, and between the return leveling layer and the upper inner wall bricks of the annular channel, resulting in the return leveling layer and the inner wall of the annular channel being subjected to the horizontal lateral thrust from the limestone in the kiln, and the return leveling layer and the inner wall bricks of the annular channel gradually moving into the annular channel, and falling into the annular channel in severe cases, causing the inner wall of the annular channel to collapse. The stability of the arch bridge and the inner wall of the annular channel is improved, and the service life of the lime kiln is increased.

[0011] Furthermore, the double-layer horizontal arch bridges are arranged on the upper sides of two adjacent corbels, and the number of the double-layer horizontal arch bridges is consistent with the number of the corbels.

[0012] A single double-layer horizontal arch bridge is located on two adjacent corbels, and several double-layer horizontal arch bridges are combined together to form a complete circle on the corbels, serving as the foundation of the inner wall of the annular channel thereon.

[0013] Furthermore, the refractory bricks on both sides of the horizontal arch bridge lower layer and the horizontal arch bridge upper layer are both trapezoidal structures with narrow upper part and wide lower part, and the refractory bricks in the middle of the horizontal arch bridge lower layer and the horizontal arch bridge upper layer are both trapezoidal structures with wide upper part and narrow lower part.

[0014] By arranging the refractory brick structure in the lower layer of the horizontal arch bridge and the upper layer of the horizontal arch bridge, a stable supporting structure can be formed, thereby improving the stability of the inner wall of the annular channel.

[0015] Furthermore, the refractory bricks are wedge-shaped, and adjacent refractory bricks are interlocked.

[0016] In the high temperature environment of the lime kiln, the increase in furnace temperature will cause the expansion of the refractory bricks, and the wedge-shaped structure can effectively absorb and disperse this expansion pressure, reducing the cracking and damage of the refractory bricks. In addition, the wedge-shaped structure can also provide a better joint surface between bricks, increase friction, and prevent relative sliding of refractory bricks.

[0017] Furthermore, the vertical joints between two adjacent refractory bricks in the lower layer of the horizontal arch bridge and the vertical joints between two adjacent refractory bricks in the upper layer of the horizontal arch bridge are arranged alternately.

[0018] By staggering the vertical joints, the supporting role of the double-layer horizontal arch bridges can be maximized, thereby increasing the stability and durability of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the cross section of the utility model;

[0020] Figure 2 It is a schematic diagram of the top-view cross-sectional structure of the upper layer of the horizontal arch bridge in the utility model.

[0021] In the figure: 1. Corbel; 2. Double-deck horizontal arch bridge; 21. Lower deck of horizontal arch bridge; 22. Upper deck of horizontal arch bridge; 3. Inner wall of circular passage. DETAILED DESCRIPTION

[0022] The utility model is described in detail below with reference to the accompanying drawings.

[0023] like Figure 1-2 As shown, a corbel-type double-chamber lime kiln with a novel arch bridge comprises a corbel 1, a double-layer horizontal arch bridge 2 and an inner wall 3 of an annular channel, the upper side of the corbel 1 is built with a double-layer horizontal arch bridge 2, and the upper side of the double-layer horizontal arch bridge 2 is built with an inner wall 3 of annular channel. The double-layer horizontal arch bridge 2 comprises a lower horizontal arch bridge layer 21 and an upper horizontal arch bridge layer 22, both of which are built with refractory bricks, and grooves are provided on the upper sides of the refractory bricks in the lower horizontal arch bridge layer 21 and the upper horizontal arch bridge layer 22, and protrusions are provided at the bottom of the inner wall 3 of the annular channel and the upper horizontal arch bridge layer 22, and the grooves are matched with the protrusions.

[0024] Refractory bricks are manufactured in refractory material factories. They can be fired refractory bricks or prefabricated refractory blocks. Refractory bricks are preassembled in refractory material factories to ensure that the size after assembly is accurate, the surface is flat, and the gap is no more than 3mm. They are then packaged and shipped to the lime kiln construction site. The refractory materials in the lime kiln chamber are built from bottom to top. After the cooling belt and corbel 1 are built, a template is first set up between the two adjacent corbels 1 on the top of the corbel 1. The lower layer 21 of the horizontal arch bridge is built on the template. The refractory bricks are smoothed with refractory mud. Then, the upper layer 22 of the horizontal arch bridge is built on the top of the lower layer 21 of the horizontal arch bridge. The refractory bricks are smoothed with refractory mud, and it is ensured that the grooves on the top of the refractory bricks in the lower layer 21 of the horizontal arch bridge and the protrusions on the bottom of the refractory bricks in the upper layer 22 of the horizontal arch bridge are engaged with each other. Then, the inner wall 3 of the annular channel is built on the top of the upper layer 22 of the horizontal arch bridge. , smooth the refractory bricks with refractory slurry, pay attention to the groove on the top of the refractory bricks in the upper layer 22 of the horizontal arch bridge and the protrusion at the bottom of the lowest layer of bricks on the inner wall 3 of the annular channel interlock with each other, then on the top of the corbel 1, the refractory bricks in the lower layer 21 of the horizontal arch bridge, the refractory bricks in the upper layer 22 of the horizontal arch bridge, behind the lowest layer of bricks on the inner wall 3 of the annular channel, until the outer wall of the annular channel, build horizontal supports, and continue to build the outer wall of the annular channel of the lime kiln, the top of the annular channel, the connecting channel, the calcining zone, the preheating zone, and the loading zone. After the refractory kiln chamber is completely built, bake the furnace according to the furnace baking system.

[0025] Specifically, the double-layer horizontal arch bridge 2 is arranged on the upper side of two adjacent corbels 1, and the number of the double-layer horizontal arch bridges 2 is consistent with the number of the corbels 1. The number of the double-layer horizontal arch bridges 2 is calculated according to the number of the corbels 1, and a suitable number of refractory bricks is specified according to the number of the double-layer horizontal arch bridges 2. When laying masonry, a template is first set up between the tops of two adjacent corbels 1, and the lower layer 21 of the horizontal arch bridge is laid on the template, and the lower layers 21 of each horizontal arch bridge are laid synchronously to ensure that the formed circular structure is uniform and stable. After the lower layer 21 of the horizontal arch bridge is laid, the upper layer 22 of the horizontal arch bridge is laid thereon, and the upper layers 22 of each horizontal arch bridge are laid synchronously, and then the template can be removed.

[0026] Specifically, the refractory bricks on both sides of the horizontal arch bridge lower layer 21 and the horizontal arch bridge upper layer 22 are both trapezoidal structures with narrow upper parts and wide lower parts, and the refractory bricks in the middle of the horizontal arch bridge lower layer 21 and the horizontal arch bridge upper layer 22 are both trapezoidal structures with wide upper parts and narrow lower parts. By setting the refractory brick structures in the horizontal arch bridge lower layer 21 and the horizontal arch bridge upper layer 22, a stable supporting structure can be formed, thereby improving the stability of the inner wall 3 of the annular channel.

[0027] Specifically, the refractory bricks have a wedge-shaped structure, and adjacent refractory bricks interlock with each other. In the high temperature environment of the lime kiln, the increase in temperature in the furnace will cause the refractory bricks to expand, and the wedge-shaped structure can effectively absorb and disperse this expansion pressure, reducing the cracking and damage of the refractory bricks. In addition, the wedge-shaped structure can also provide a better joint surface between bricks, increase friction, and prevent relative sliding of the refractory bricks.

[0028] Specifically, the vertical joints between two adjacent refractory bricks in the lower layer 21 of the horizontal arch bridge and the vertical joints between two adjacent refractory bricks in the upper layer 22 of the horizontal arch bridge are staggered. By staggering the vertical joints, the supporting role of the double-layer horizontal arch bridge 2 can be maximized to increase the stability and durability of the structure.

[0029] The above is a detailed description of the utility model in combination with specific embodiments, and it cannot be determined that the specific implementation methods of the present invention are limited to these descriptions. For ordinary technicians in the technical field to which the utility model belongs, making several equivalent substitutions or obvious modifications without departing from the concept of the present invention, and having the same performance or use, should be regarded as belonging to the patent protection scope of the utility model determined by the submitted claims.

Claims

1. A double-chambered lime kiln with a new type of arch bridge, comprising a corbel (1), a double-layer horizontal arch bridge (2) and an inner wall of a ring channel (3), characterized in that: A double-layer horizontal arch bridge (2) is built on the upper side of the corbel (1), and an inner wall (3) of a circular channel is built on the upper side of the double-layer horizontal arch bridge (2); The double-layer horizontal arch bridge (2) comprises a horizontal arch bridge lower layer (21) and a horizontal arch bridge upper layer (22), the horizontal arch bridge lower layer (21) and the horizontal arch bridge upper layer (22) are both built with refractory bricks, the upper sides of the refractory bricks in the horizontal arch bridge lower layer (21) and the horizontal arch bridge upper layer (22) are both provided with grooves, the inner wall (3) of the annular channel and the bottom of the horizontal arch bridge upper layer (22) are both provided with protrusions, and the grooves are adapted to the protrusions.

2. A double-chambered lime kiln with a new type of arch bridge according to claim 1, characterized in that: The double-layer horizontal arch bridge (2) is arranged on the upper side of two adjacent corbels (1), and the number of the double-layer horizontal arch bridge (2) is consistent with the number of the corbels (1).

3. A double-chambered lime kiln with a new type of arch bridge according to claim 2, characterized in that: The refractory bricks located on both sides of the horizontal arch bridge lower layer (21) and the horizontal arch bridge upper layer (22) are both trapezoidal structures with narrow upper parts and wide lower parts, and the refractory bricks located in the middle of the horizontal arch bridge lower layer (21) and the horizontal arch bridge upper layer (22) are both trapezoidal structures with wide upper parts and narrow lower parts.

4. The double-chambered lime kiln with a new type of arch bridge according to claim 3 is characterized in that: The refractory bricks are wedge-shaped, and adjacent refractory bricks are interlocked with each other.

5. The double-chambered lime kiln with a new type of arch bridge according to claim 4, characterized in that: The vertical joints between two adjacent refractory bricks in the lower layer (21) of the horizontal arch bridge and the vertical joints between two adjacent refractory bricks in the upper layer (22) of the horizontal arch bridge are arranged alternately.

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