Bracket type double-chamber lime kiln with precast block arch bridge

Abstract

The utility model relates to a bracket type double-hearth lime kiln with a precast block arch bridge, which comprises a hearth and a refractory material lining, the refractory material lining comprises a furnace top part, a preheating zone upper part, a preheating zone lower part, a calcining zone straight section upper part, a calcining zone straight section lower part, an annular channel inner wall, an arch bridge precast block body, an annular channel top, an annular channel outer wall, a cooling zone upper part, a cooling zone lower part, a connecting channel top, a connecting channel side wall and a connecting channel bottom. According to the bracket type double-hearth lime kiln with the precast block arch bridge, the arch bridge precast block is produced in a refractory material factory and only needs to be hoisted on a construction site, so that the construction difficulty is greatly reduced, the arch bridge precast block is dried and thermally treated in the refractory material factory, enough strength is generated, and water is not brought into the kiln hearth; safety and energy conservation during kiln drying are facilitated, and it can be guaranteed that the core part of the refractory material kiln chamber lining of the bracket type double-chamber lime kiln can be stably used for more than three years.

Description

Technical Field

[0001] The utility model relates to the technical field of lime kilns, in particular to a corbel type double-chamber lime kiln with a prefabricated block arch bridge. Background Art

[0002] Double-chamber lime kilns are divided into two types according to the support method of the inner wall of the annular channel: corbel type and hanging cylinder type. The corbel type double-chamber lime kiln has a layer of refractory material built inside the kiln chamber as the kiln chamber lining that is in direct contact with limestone and flame. The refractory kiln chamber lining structure is divided into the following parts from bottom to top: cooling zone, corbel, arch bridge prefabricated block body, inner and outer walls of the annular channel, annular channel top, connecting channel side walls and top, calcining zone, preheating zone, feeding zone. Among them, the corbel, arch bridge prefabricated block body, inner wall of the annular channel, and annular channel top are the refractory kiln chamber lining areas with the most complex structure and the most prone to damage in the corbel type double-chamber lime kiln, while the arch bridge prefabricated block body is located on the upper part of the corbel, directly supporting the inner wall and the top of the annular channel, and is the most core part of the entire lime kiln refractory kiln chamber lining.

[0003] The corbel-type double-chamber lime kiln uses prefabricated arch blocks built with fired refractory bricks. In addition, refractory bricks and mud are used to build them one by one, which is prone to problems such as uneven brick joints, incomplete mud, unstable mud viscosity and fluidity. When the arch bridge is closed, bricks generally need to be cut to match the final vacancy. It is difficult to cut refractory bricks on site, the size is not accurate, dry cutting brings dust pollution, and wet cutting brings too much moisture into the kiln. Many kiln chambers have arch bridge damage after six to twelve months of use, and then the inner wall and top of the annular channel are damaged, and the furnace has to be stopped for maintenance. Utility Model Content

[0004] In view of the shortcomings of the prior art, the utility model provides a double-chambered lime kiln with a prefabricated block arch bridge, which has the advantages of replacing the brickwork of the arch foot with prefabricated refractory blocks, thereby solving the problem of easy deformation and brick falling of the arch foot of the brick-built arch bridge.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a double-chamber lime kiln with a prefabricated block arch bridge, comprising a furnace and a refractory lining, wherein the refractory lining comprises a furnace top, an upper preheating zone, a lower preheating zone, an upper straight section of a calcining zone, a lower straight section of a calcining zone, an inner wall of an annular channel, an arch bridge prefabricated block body, an annular channel top, an outer wall of an annular channel, an upper cooling zone, a lower cooling zone, a corbel, a connecting channel top, a connecting channel side wall and a connecting channel bottom, wherein the upper preheating zone is located at an outer surface of one end of the furnace top, the lower preheating zone is located at an outer surface of one end of the upper preheating zone, the upper straight section of the calcining zone is located at an outer surface of one end of the lower preheating zone, and the lower straight section of the calcining zone is located at the upper straight section of the calcining zone The outer surface of one end of the annular channel, the inner wall of the annular channel is located on the outer surface of one side of the lower part of the straight section of the calcining zone, the arch bridge prefabricated block body is located at the lower part of the inner wall of the annular channel, the top of the annular channel is located on the outer surface of one end of the lower part of the straight section of the calcining zone, the outer wall of the annular channel is located on the outer surface of one end of the top of the annular channel, the upper part of the cooling zone is located on the outer surface of one end of the outer wall of the annular channel, the lower part of the cooling zone is located on the outer surface of one end of the upper part of the cooling zone, the top of the connecting channel is located on one side of the top of the annular channel, the side wall of the connecting channel is located on the outer surface of one end of the top of the connecting channel, the bottom of the connecting channel is located on the outer surface of one end of the side wall of the connecting channel, the corbel is arranged at the bottom end of the bottom of the connecting channel, and at least two spray guns are arranged in the middle of the furnace.

[0006] Furthermore, the arch bridge prefabricated block body is located on the top of the corbel, and no less than two of the arch bridge prefabricated block bodies are combined into an arch bridge ring.

[0007] Furthermore, the upper surface of the arch bridge prefabricated block body is shaped like a boss, and the height of the boss is fifty millimeters to three hundred millimeters.

[0008] Furthermore, the shape of the lower end surface of the arch bridge prefabricated block body is an arch, and the height of the highest and lowest points of the arch is fifty to three hundred millimeters.

[0009] Furthermore, the minimum length of the straight sections on both sides of the length direction of the lower end surface of the arch bridge prefabricated block body is one hundred millimeters, and the maximum length of the straight sections on both sides of the length direction of the lower end surface of the arch bridge prefabricated block body is four hundred millimeters.

[0010] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0011] The bull leg type double-chamber lime kiln with prefabricated arch bridge has arch bridge prefabricated blocks produced in a refractory material factory, and only needs to be hoisted at the construction site, which greatly reduces the construction difficulty. At the same time, the production equipment and personnel are professional enough, so that the size of the arch bridge prefabricated blocks is accurate. The arch bridge prefabricated blocks are dried and heat treated in the refractory material factory to generate sufficient strength, and no moisture is introduced into the kiln chamber, which is beneficial to the safety and energy saving during kiln drying, and can ensure the most core part of the kiln chamber lining of the refractory material of the bull leg type double-chamber lime kiln, and can be used stably for more than three years. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the utility model;

[0013] Figure 2 This is a front view schematic diagram of the main body of the prefabricated arch bridge block of the utility model;

[0014] Figure 3 This is a top view of the prefabricated block body of the utility model arch bridge;

[0015] Figure 4 This is a schematic diagram of the front and side view of the prefabricated block of the arch bridge of the utility model;

[0016] Figure 5 It is a schematic diagram of the circular ring of the arch bridge of the utility model.

[0017] In the figure: 1 cooling zone lower part, 2 cooling zone upper part, 3 annular channel inner wall, 4 annular channel outer wall, 5 arch bridge prefabricated block body, 6 connecting channel bottom, 7 connecting channel side wall, 8 connecting channel top, 9 furnace, 10 refractory material lining, 11 spray gun, 12 furnace top, 13 preheating zone upper part, 14 preheating zone lower part, 15 calcining zone straight section upper part, 16 calcining zone straight section lower part, 17 annular channel top. DETAILED DESCRIPTION

[0018] 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.

[0019] See also Figure 1-5In this embodiment, a double-chamber lime kiln with a prefabricated block arch bridge includes a furnace 9 and a refractory lining 10. The refractory lining 10 includes a furnace top 12, a preheating zone upper part 13, a preheating zone lower part 14, a calcining zone straight section upper part 15, a calcining zone straight section lower part 16, an annular channel inner wall 3, an arch bridge prefabricated block body 5, an annular channel top 17, an annular channel outer wall 4, a cooling zone upper part 2, a cooling zone lower part 1, a corbel 18, a connecting channel top 8, a connecting channel side wall 7 and a connecting channel bottom 6. The preheating zone upper part 13 is located on the outer surface of one end of the furnace top 12, the preheating zone lower part 14 is located on the outer surface of one end of the preheating zone upper part 13, the calcining zone straight section upper part 15 is located on the outer surface of one end of the preheating zone lower part 14, and the calcining zone straight section lower part 16 is located on the outer surface of the calcining zone straight section The outer surface of one end of the upper part 15 of the segment, the inner wall 3 of the annular channel is located on the outer surface of one side of the lower part 16 of the straight section of the calcining zone, the arch bridge prefabricated block body 5 is located at the lower part of the inner wall 3 of the annular channel, the top 17 of the annular channel is located on the outer surface of one end of the lower part 16 of the straight section of the calcining zone, the outer wall 4 of the annular channel is located on the outer surface of one end of the top 17 of the annular channel, the upper part 2 of the cooling zone is located on the outer surface of one end of the outer wall 4 of the annular channel, the lower part 1 of the cooling zone is located on the outer surface of one end of the upper part 2 of the cooling zone, the top 8 of the connecting channel is located on one side of the top 17 of the annular channel, the side wall 7 of the connecting channel is located on the outer surface of one end of the top 8 of the connecting channel, the bottom 6 of the connecting channel is located on the outer surface of one end of the side wall 7 of the connecting channel, the corbel 18 is arranged at the bottom end of the bottom 6 of the connecting channel, and at least two spray guns 11 are arranged in the middle of the furnace 9.

[0020] The prefabricated block of the arch foot of the arch bridge adopts an integrated design, which is called the arch bridge prefabricated block body 5 and is assembled on the top of the corbel. The total height of the arch bridge prefabricated block body 5 is three hundred to one thousand millimeters. It adopts a vertical folding and sealing method to prevent the high-pressure wind in the kiln from communicating outward along the diameter direction of the kiln chamber. The shape of the upper surface of the arch bridge prefabricated block body 5 is a boss shape, and the height of the boss is fifty to three hundred millimeters. Along the diameter direction of the kiln chamber, the thickness is about thirty-three percent lower inside and about sixty-seven percent higher outside, thereby realizing bite-in with the bricks of the inner wall 3 of the annular channel on the top, preventing the bricks of the inner wall 3 of the annular channel from moving outward.

[0021] The arch bridge prefabricated block has high strength and good integrity. After being assembled in the kiln, under the action of the lateral support of the original arch foot, the structure is stable and not easy to deform, break or move downward, thus maintaining stable support for the upper annular channel inner wall 3 and the annular channel top 17.

[0022] The shape of the lower end surface of the arch bridge prefabricated block body 5 is an arch, and the two ends of the lower end surface of the prefabricated block in the length direction are flat. The height of the highest and lowest points of the arch is fifty to three hundred millimeters, and the arc direction of the arch is upward.

[0023] The minimum length of the straight sections on both sides of the length direction of the lower end surface of the arch bridge prefabricated block body 5 is one hundred millimeters, and the maximum length of the straight sections on both sides of the length direction of the lower end surface of the arch bridge prefabricated block body 5 is four hundred millimeters, which is used to place the arch bridge prefabricated block body 5 flat on the top of the corbel. The two side surfaces of the arch bridge prefabricated block along the circumferential direction of the kiln chamber are vertically folded and sealed to prevent the high-pressure air in the kiln from flowing outward along the diameter direction of the kiln chamber.

[0024] The arch bridge prefabricated block body 5 is located at the top of the corbel. No less than two arch bridge prefabricated block bodies 5 are combined into an arch bridge ring with a flat upper surface along the circumferential direction. No leveling layer material is needed to level the arch bridge prefabricated block body 5. The arch bridge ring is divided according to the number of corbels. The inner diameter of the arch bridge ring is equal to the inner diameter of the inner wall 3 of the annular channel, and the outer diameter of the arch bridge ring is equal to the outer diameter of the inner wall 3 of the annular channel.

[0025] The working principle of the above embodiment is:

[0026] The number of arch bridge prefabricated block bodies 5 is designed according to the number of corbels. The inner diameter of the complete ring formed by the arch bridge prefabricated block bodies 5 is equal to the inner diameter of the inner wall 3 of the annular channel, and the outer diameter of the ring is equal to the outer diameter of the inner wall 3 of the annular channel. The arch bridge prefabricated block bodies 5 are produced by refractory castables, and the material thereof can be commonly used refractory castable materials, such as clay, high alumina, mullite, corundum, etc. After the arch bridge prefabricated block bodies 5 are formed, cured, and demoulded, they are dried and heat-treated in a refractory material factory, and then pre-assembled to ensure that the assembled ring size is accurate, the surface is flat, and the gap is not greater than five millimeters. Then, the arch bridge prefabricated block bodies 5 with no pre-assembly problems are packaged and shipped to the lime kiln construction site, and the refractory materials of the lime kiln chamber are built from bottom to top. When the cooling zone and the corbel are built, the arch bridge prefabricated block body 5 is hoisted into the kiln chamber of the lime kiln piece by piece and placed on the top of the built corbel. The space between the prefabricated arch bridge block body 5 and the corbel is smoothed with refractory mud, and the space between two adjacent arch bridge prefabricated block bodies 5 is filled with refractory mud. After the arch bridge prefabricated block body 5 is assembled, the lateral support of the arch bridge prefabricated block body 5 is built on the top of the corbel. The height of the lateral support is the same as that of the arch bridge prefabricated block body 5. After the lateral support of the arch bridge prefabricated block body 5 is built, the inner wall 3 of the annular channel is built on the upper part of the arch bridge prefabricated block body 5, and then the annular channel outer wall 4 of the lime kiln, the annular channel top 17, the connecting channel, the calcining zone, the preheating zone, and the feeding zone are built in sequence. After the refractory kiln chamber is fully built, the furnace is baked according to the furnace baking system.

[0027] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A double-chambered lime kiln with a prefabricated block arch bridge, comprising a furnace (9) and a refractory lining (10), characterized in that: The refractory material lining (10) comprises a furnace top (12), an upper preheating zone (13), a lower preheating zone (14), an upper straight section of a calcining zone (15), a lower straight section of a calcining zone (16), an inner wall of an annular channel (3), an arch bridge prefabricated block body (5), an annular channel top (17), an outer wall of an annular channel (4), an upper cooling zone (2), a lower cooling zone (1), a bracket (18), a connecting channel top (8), a connecting channel side wall (7) and a connecting channel bottom (6), wherein the upper preheating zone (13) is located on an outer surface of one end of the furnace top (12), the lower preheating zone (14) is located on an outer surface of one end of the upper preheating zone (13), the upper straight section of the calcining zone (15) is located on an outer surface of one end of the lower preheating zone (14), the lower straight section of the calcining zone (16) is located on an outer surface of one end of the upper straight section of the calcining zone (15), and the inner wall of the annular channel (3) is located on an outer surface of one end of the upper preheating zone (15). The arch bridge prefabricated block body (5) is located at the lower part of the inner wall (3) of the annular channel, the annular channel top (17) is located at the outer surface of one end of the lower part (16) of the calcining zone straight section, the annular channel outer wall (4) is located at the outer surface of one end of the annular channel top (17), the cooling zone upper part (2) is located at the outer surface of one end of the annular channel outer wall (4), the cooling zone lower part (1) is located at the outer surface of one end of the cooling zone upper part (2), the connecting channel top (8) is located on one side of the annular channel top (17), the connecting channel side wall (7) is located at the outer surface of one end of the connecting channel top (8), the connecting channel bottom (6) is located at the outer surface of one end of the connecting channel side wall (7), the bracket (18) is arranged at the bottom end of the connecting channel bottom (6), and at least two spray guns (11) are arranged in the middle of the furnace (9).

2. A double-chambered corbel-type lime kiln with a prefabricated block arch bridge according to claim 1, characterized in that: The arch bridge prefabricated block body (5) is located on the top of the corbel (18), and no less than two of the arch bridge prefabricated block bodies (5) are combined into an arch bridge ring.

3. The double-chambered lime kiln with a prefabricated block arch bridge according to claim 1, characterized in that: The upper surface of the arch bridge prefabricated block body (5) is in the shape of a boss, and the height of the boss is fifty millimeters to three hundred millimeters.

4. The double-chambered lime kiln with a prefabricated block arch bridge according to claim 1, characterized in that: The lower end surface of the arch bridge prefabricated block body (5) is in the shape of an arch, and the heights of the highest and lowest points of the arch are fifty to three hundred millimeters.

5. The double-chambered lime kiln with a prefabricated block arch bridge according to claim 1, characterized in that: The minimum length of the straight sections on both sides of the length direction of the lower end surface of the arch bridge prefabricated block body (5) is one hundred millimeters, and the maximum length of the straight sections on both sides of the length direction of the lower end surface of the arch bridge prefabricated block body (5) is four hundred millimeters.

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