A double chamber lime kiln with reinforced annular channel roof

Abstract

The utility model relates to kiln equipment technical field especially relates to a kind of double-chamber lime kiln with reinforced annular channel top, including lower kiln body, upper kiln body and plugging component, plugging component includes dense refractory castable, lightweight refractory castable and lightweight heat insulating material, two groups of lower kiln body are interconnected, the upper portion of lower kiln body is provided with upper kiln body, annular channel is arranged between upper kiln body outer wall and lower kiln body inside, the upper portion of annular channel is provided with dense refractory castable, the upper portion of dense refractory castable is provided with lightweight refractory castable, the upper portion of lightweight refractory castable is provided with lightweight heat insulating material, the part of lower kiln body and plugging component connection is annular channel outer wall, the part of upper kiln body and plugging component connection is annular channel inner wall;The utility model has reinforced annular channel, simultaneously uses the way of cast to build annular channel, prolongs the service life of lime kiln.

Description

Technical Field

[0001] This utility model relates to the field of kiln equipment technology, and in particular to a double-chamber lime kiln with a reinforced annular channel top. Background Technology

[0002] A double-chamber lime kiln consists of two adjacent kiln chambers, each with an annular passage for hot air circulation. The annular passage comprises three parts: an outer wall, an inner wall, and a roof. The outer and inner walls are constructed of refractory bricks, and the roof, also made of refractory material, seals the annular passage from the top.

[0003] The top of the annular channel is traditionally constructed with refractory bricks and filled with insulating material. Due to the complex structure of the annular channel top and the presence of fire extraction holes, the bricks used for construction are specially designed and manufactured special-shaped bricks, making construction very difficult. Furthermore, a large number of refractory bricks need to be cut, which is labor-intensive and time-consuming. In the operation of lime kilns, the annular channel top is subjected to high temperatures of approximately 1000°C, the blowing of high-pressure hot air, and the vibration of the kiln body caused by limestone feeding and the alternating ignition of the two kiln chambers. Often, within one year, damage such as loosening, cracking, peeling, and breaking of the refractory bricks in the annular channel top will occur, which in turn will burn out the fire extraction holes and the steel plate of the annular channel top.

[0004] Therefore, to address the above problems, a double-chamber lime kiln with a reinforced annular channel top was designed. The annular channel top was reinforced and constructed using a casting method, thus solving the problems of easy damage and short lifespan of the annular channel top. Utility Model Content

[0005] To overcome the challenges of traditionally using refractory bricks to construct the top of most annular channels, which are then filled with insulating material, the construction of these channels is difficult due to their complex structure, the presence of fire extraction holes, and the need for specially designed and manufactured bricks. This process is labor-intensive and time-consuming, requiring extensive cutting of the refractory bricks. Furthermore, in lime kilns, the annular channel top is subjected to high temperatures of approximately 1000℃, high-pressure hot air purging, and kiln vibrations caused by limestone feeding and alternating ignition of the two kiln chambers. Consequently, within a year, the refractory bricks on the annular channel top often experience loosening, cracking, peeling, and breakage, leading to damage to the fire extraction holes and the steel plate of the annular channel top.

[0006] The technical solution of this utility model is as follows: a double-chamber lime kiln with a reinforced annular channel top, comprising a lower kiln body, an upper kiln body, and a sealing assembly. The sealing assembly includes dense refractory castable, lightweight refractory castable, and lightweight heat insulation material. The lower kiln body is provided in two sets, which are interconnected. An upper kiln body is provided above the lower kiln body. An annular channel is provided between the outer wall of the upper kiln body and the interior of the lower kiln body. Dense refractory castable is provided above the annular channel. Lightweight refractory castable is provided above the dense refractory castable. Lightweight heat insulation material is provided above the lightweight refractory castable. The dense refractory castable and the lightweight refractory castable are formed by casting. The part where the lower kiln body connects to the sealing assembly is the outer wall of the annular channel, and the part where the upper kiln body connects to the sealing assembly is the inner wall of the annular channel. The inner wall and the outer wall of the annular channel are constructed of refractory bricks.

[0007] Preferably, a connecting channel is provided between the two sets of lower kiln bodies, and the connecting channel is connected and interconnected with the two sets of lower kiln bodies. A fire extraction hole is provided on one side of the upper kiln body and on the top of the annular channel. Stainless steel anchors are provided in the dense refractory castable and the lightweight refractory castable, and the spacing of the stainless steel anchors is between 150 and 250 mm.

[0008] Preferably, the thickness of dense refractory castable is between 300 and 850 mm, and the thickness of lightweight refractory castable is between 200 and 500 mm.

[0009] Preferably, an external expansion joint is provided between the dense refractory castable and the outer wall of the annular channel, and the external expansion joint is filled with lightweight thermal insulation material. An internal expansion joint is provided between the dense refractory castable and the inner wall of the annular channel, and the internal expansion joint is filled with lightweight thermal insulation material.

[0010] Preferably, the thickness of the horizontal portion of the external wall expansion joint and the internal wall expansion joint ranges from 10 to 50 millimeters, and the thickness of the vertical portion of the external wall expansion joint and the internal wall expansion joint ranges from 6 to 20 millimeters.

[0011] Preferably, the connection between the dense refractory castable and the outer wall of the annular channel is provided with an outer triangular reinforcement, and the connection between the dense refractory castable and the inner wall of the annular channel is provided with an inner triangular reinforcement.

[0012] Preferably, the length of the right-angled side of the outer triangular reinforcement and the inner triangular reinforcement is between 100 and 500 millimeters, and an expansion joint is left between the vertical side of the inner triangular reinforcement and the inner wall of the annular passage.

[0013] The beneficial effects of this utility model are:

[0014] This invention's reinforced annular channel top overcomes the problems of traditional brick-built annular channels, such as complex brick shapes, difficult construction, and susceptibility to loosening, peeling, and brick loss during use. The dense refractory castable is easy to construct, forming a complete annular channel top that is tightly connected to the outer and inner walls of the annular channel and the blast holes. It boasts high strength and can withstand the impact and friction of high-temperature, high-pressure hot air. The lightweight refractory castable and the lightweight insulation material on top block the upward conduction of high temperatures, protecting the steel plate of the annular channel top, reducing the frequency of annular channel maintenance during lime kiln shutdowns, and improving the overall operating efficiency of the lime kiln. Attached Figure Description

[0015] Figure 1 The diagram shown is a three-dimensional structural schematic of a double-chamber lime kiln with a reinforced annular channel top according to the present invention.

[0016] Figure 2 The diagram shows a three-dimensional structure of the lower kiln body of a double-chamber lime kiln with a reinforced annular channel top according to this utility model.

[0017] Figure 3 The diagram shown is a three-dimensional structural diagram of the annular channel of a double-chamber lime kiln with a reinforced annular channel top according to this utility model.

[0018] Figure 4 The diagram shown is a schematic plan view of the annular channel structure of a double-chamber lime kiln with a reinforced annular channel top according to this utility model.

[0019] Explanation of reference numerals in the attached drawings: 1. Lower kiln body; 2. Upper kiln body; 3. Connecting channel; 4. Annular channel; 5. Inner wall of the annular channel; 6. Outer wall of the annular channel; 7. Lightweight thermal insulation material; 8. Dense refractory castable; 9. Lightweight refractory castable; 101. Exhaust hole; 102. Stainless steel anchor; 103. Exterior wall expansion joint; 104. Inner wall expansion joint; 801. Outer triangular reinforcement; 802. Inner triangular reinforcement. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Please see Figures 1-4This utility model provides an embodiment: a double-chamber lime kiln with a reinforced annular channel top, comprising a lower kiln body 1, an upper kiln body 2, and a sealing assembly. The sealing assembly includes dense refractory castable 8, lightweight refractory castable 9, and lightweight insulating material 7. The lower kiln body 1 is provided in two sets, which are interconnected. The upper kiln body 2 is located above the lower kiln body 1. An annular channel 4 is provided between the outer wall of the upper kiln body 2 and the interior of the lower kiln body 1. Dense refractory castable 8 is located above the annular channel 4, and lightweight refractory castable 9 is located above the dense refractory castable 8. Lightweight insulating material 7 is installed above the kiln body. Dense refractory castable 8 and lightweight refractory castable 9 are formed by casting. The lower kiln body 1 connects to the sealing assembly as the outer wall 6 of the annular channel, while the upper kiln body 2 connects to the sealing assembly as the inner wall 5 of the annular channel. Both the inner and outer walls of the annular channel are constructed of refractory bricks. The dense refractory castable 8 and lightweight refractory castable 9 are easy to construct, directly forming a complete annular channel top and ensuring a tight connection between the annular channel top and the inner and outer walls. Furthermore, the dense refractory castable 8 has high strength, resisting the impact and friction of high-temperature, high-pressure hot air. The lightweight refractory castable 9 and the lightweight insulating material 7 above it block the upward conduction of high temperature, protecting the safety of the annular channel top steel plate.

[0022] Please see Figures 1-2 In this embodiment, a connecting channel 3 is provided between the two sets of lower kiln bodies 1. The connecting channel 3 is connected and interconnected with the two sets of lower kiln bodies 1. A fire-removing hole 101 is provided on one side of the upper kiln body 2 and on the top of the annular channel. The connecting channel 3 connects and interconnects the two sets of lower kiln bodies 1. The fire-removing hole 101 is used to check and clean the ash accumulation in the annular channel 4.

[0023] Please see Figures 3-4In this embodiment, stainless steel anchors 102 are provided in the dense refractory castable 8 and the lightweight refractory castable 9. The spacing of the stainless steel anchors 102 is between 150 and 250 mm. The thickness of the dense refractory castable 8 is between 300 and 850 mm, and the thickness of the lightweight refractory castable 9 is between 200 and 500 mm. An external expansion joint 103 is provided between the dense refractory castable 8 and the outer wall 6 of the annular channel. The external expansion joint 103 is filled with lightweight thermal insulation material 7. An internal expansion joint 104 is provided between the dense refractory castable 8 and the inner wall 5 of the annular channel. The internal expansion joint 104 is filled with lightweight thermal insulation material 7. The horizontal thickness of the external expansion joint 103 and the internal expansion joint 104 ranges from 10 to 50 mm, and the vertical thickness of the external expansion joint 103 and the internal expansion joint 104 ranges from 6 to 20 mm. Between the dense refractory castable 8 and the outer wall 6 of the annular channel, an outer triangular reinforcement 801 is provided at the connection point, and an inner triangular reinforcement 802 is provided at the connection point between the dense refractory castable 8 and the inner wall 5 of the annular channel. The length of the right-angled side of the outer triangular reinforcement 801 and the inner triangular reinforcement 802 is between 100 and 500 millimeters. An inner wall expansion joint 104 is left between the vertical side of the inner triangular reinforcement 802 and the inner wall 5 of the annular channel. The stainless steel anchor 102 can enhance the adhesion strength between the dense refractory castable 8 and the lightweight refractory castable 9. The outer wall expansion joint 103 provides space for thermal expansion between the outer wall 6 of the annular channel and the dense refractory castable 8, ensuring that the dense refractory castable 8 and the lightweight refractory castable 9 will not be damaged by the upward expansion of the outer wall 6 of the annular channel. The outer triangular reinforcement 801 and the inner triangular reinforcement 802 reinforce the annular channel 4.

[0024] During construction, the inner wall 5 and outer wall 6 of the annular passage are first constructed normally to the predetermined height of the top of the annular passage. Stainless steel anchors 102 extending downwards are welded to the steel plate at the top of the annular passage 4. The spacing of the stainless steel anchors 102 is between 150 and 250 mm. The stainless steel anchors 102 can partially extend into the outer triangle 801 and inner triangle 802. Then, a casting formwork for the dense refractory castable 8 is erected at the top of the inner wall 5 and outer wall 6 of the annular passage. The bottom surface of the formwork should be positioned to ensure a gap of 10 to 50 mm between the lower surface of the dense refractory castable 8 and the upper surface of the outer wall 6 and inner wall 5 of the annular passage. Simultaneously, six [unclear text - possibly a type of concrete structure] are left between the dense refractory castable 8 and the lightweight bricks outside the outer wall 6 of the annular passage. A gap of 20 mm is made, and lightweight heat insulation material 7 is filled into the two gaps mentioned above, including but not limited to aluminum silicate fiber cotton, blankets, felts, rock wool, etc. Then, a construction template of dense refractory castable 8, outer triangular reinforcement 801 and inner triangular reinforcement 802 is also erected directly above the annular channel 4. The two sets of templates are connected as one unit. Then, a layer of dense refractory castable 8 with a height of 300 to 850 mm is poured into the template. After the dense refractory castable 8 has solidified, a layer of lightweight refractory castable 9 with a height of 200 to 500 mm is poured on top of it. After the lightweight refractory castable 9 has solidified, lightweight heat insulation material 7 is filled into the gap between the lightweight refractory castable 9 and the topmost steel plate. Then, the annular channel 4 and the lime kiln are dried together as a whole and then put into use.

[0025] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A double-chamber lime kiln with a reinforced annular channel roof, comprising a lower kiln body (1); characterized in that: It also includes an upper kiln body (2) and a sealing assembly. The sealing assembly includes dense refractory castable (8), lightweight refractory castable (9), and lightweight insulation material (7). The lower kiln body (1) is provided in two sets, and the two sets of lower kiln bodies (1) are interconnected. An upper kiln body (2) is provided above the lower kiln body (1). An annular channel (4) is provided between the outer wall of the upper kiln body (2) and the interior of the lower kiln body (1). Dense refractory castable (8) is provided above the annular channel (4). Lightweight refractory castable (9) is provided above the dense refractory castable (8). The structure is equipped with lightweight heat insulation material (7), dense refractory castable (8) and lightweight refractory castable (9) are formed by casting, the lower kiln body (1) is connected to the sealing component as the outer wall of the annular channel (6), the upper kiln body (2) is connected to the sealing component as the inner wall of the annular channel (5), the inner wall of the annular channel (5) and the outer wall of the annular channel (6) are made of refractory bricks, the connection between the dense refractory castable (8) and the outer wall of the annular channel (6) is provided with an outer triangular reinforcement (801), and the connection between the dense refractory castable (8) and the inner wall of the annular channel (5) is provided with an inner triangular reinforcement (802).

2. A double-chamber lime kiln with a reinforced annular channel top according to claim 1, characterized in that: A connecting channel (3) is provided between the two sets of lower kiln bodies (1). The connecting channel (3) is connected and communicates with the two sets of lower kiln bodies (1). Multiple fire-pulling holes (101) are provided on one side of the upper kiln body (2) and on the top of the annular channel. Stainless steel anchors (102) are provided in the dense refractory castable (8) and the lightweight refractory castable (9). The spacing of the stainless steel anchors (102) is between 150 and 250 mm.

3. A double-chamber lime kiln with a reinforced annular channel top according to claim 1, characterized in that: The thickness of the dense refractory castable (8) is between 300 and 850 mm, and the thickness of the lightweight refractory castable (9) is between 200 and 500 mm.

4. A double-chamber lime kiln with a reinforced annular channel top according to claim 1, characterized in that: An external expansion joint (103) is provided between the dense refractory castable (8) and the outer wall (6) of the annular channel, and the external expansion joint (103) is filled with lightweight thermal insulation material (7). An internal expansion joint (104) is provided between the dense refractory castable (8) and the inner wall (5) of the annular channel, and the internal expansion joint (104) is filled with lightweight thermal insulation material (7).

5. A double-chamber lime kiln with a reinforced annular channel top according to claim 4, characterized in that: The thickness of the horizontal portion of the external wall expansion joint (103) and the internal wall expansion joint (104) ranges from ten to fifty millimeters, and the thickness of the vertical portion of the external wall expansion joint (103) and the internal wall expansion joint (104) ranges from six to twenty millimeters.

6. A double-chamber lime kiln with a reinforced annular channel top according to claim 1, characterized in that: The length of the right-angled side of the outer triangular reinforcement (801) and the inner triangular reinforcement (802) is between 100 and 500 millimeters. An expansion joint (104) is left between the vertical side of the inner triangular reinforcement (802) and the inner wall (5) of the annular passage.

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