Hanging type bracket-free stone accumulation prevention double-hearth kiln
By employing a suspended design and a highly efficient heat exchange system, the problems of complex support structures and easy collapse of corbels in traditional double-chamber kilns have been solved, achieving stable and efficient production, reducing costs, and improving lime quality and yield.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHENGZHOU HUISHI REFRACTORIES CO LTD
- Filing Date
- 2025-06-12
- Publication Date
- 2026-05-12
AI Technical Summary
Traditional double-chamber kilns have complex support structures, and the brackets are prone to damage, leading to the collapse of the inner cylinder, which affects the quality and output of lime production and results in high construction costs.
The design adopts a hanging type, using tubular hanging columns and ring hanging beams to suspend the cavity on the top of the cooling cavity. Combined with the ring-shaped circulation pipe and high-strength hollow tubular hanging columns, a high-efficiency heat exchange system is formed, and anti-stone accumulation partitions are set at the junction of the cooling cavity walls.
Simplify the support structure, reduce construction costs, prevent collapse, improve the quality and output of lime production, optimize airflow distribution, improve heat exchange efficiency, and reduce energy consumption.
Smart Images
Figure CN224226913U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of double-chamber kilns, specifically relating to a suspended double-chamber kiln without corbels to prevent stone accumulation. Background Technology
[0002] The double-chamber kiln, also known as a double-chamber parallel-flow regenerative lime kiln, feeds fuel from the top of the calcination zone, which flows parallel to the raw material. Since the fuel is injected from the top of the calcination zone, the raw material can absorb most of the heat released by the fuel at this point. Moreover, the average temperature of the calcination zone is 950℃. Another important feature of the double-chamber kiln is its heat storage function, which uses heat storage to preheat a portion of the combustion air. The thermal characteristics of parallel-flow calcination and counter-flow heat storage determine that the double-chamber kiln has a very high thermal efficiency, and its heat consumption is lower than that of all types of lime kilns, such as rotary kilns and sleeve kilns.
[0003] In existing technologies, traditional double-chamber kilns typically require complex support structures to maintain the stability and safety of each functional chamber, increasing construction costs. During use, the brackets supporting the inner cylinder are prone to damage, causing the inner cylinder to collapse. After the inner cylinder and brackets collapse, the calcination quality and yield of lime are affected. Therefore, overcoming the above-mentioned technical problems and defects has become a key issue that needs to be addressed. Utility Model Content
[0004] The purpose of this utility model is to overcome the defects described in the background art, thereby realizing a suspended double-chamber kiln without corbels to prevent stone accumulation, so as to solve the problems of high cost during construction of complex support structures, easy collapse of support corbels, and impact on lime production quality and output in the prior art.
[0005] To achieve the above-mentioned utility model objectives, the technical solution of this utility model is: a suspended double-chamber kiln without corbels to prevent stone accumulation, comprising a suspended chamber, a cooling chamber, a calcining chamber, and a preheating chamber. The suspended chamber, cooling chamber, calcining chamber, and preheating chamber are each provided in two sets and are symmetrically positioned. The suspended chamber is fixedly suspended at the top of the inner cavity of the cooling chamber, the calcining chamber is located at the top of the suspended chamber, and the preheating chamber is located at the top of the calcining chamber.
[0006] Specifically, the suspended cavity includes a cavity body, tubular hanging columns, and annular hanging beams. The tubular hanging columns are distributed inside the side wall of the cavity body, the annular hanging beams are located at the bottom of the suspended cavity, the top of the tubular hanging columns penetrates the top of the side wall of the cavity body, and the cavity body is anchored as a whole to the middle position of the top of the cooling cavity through the tubular hanging columns.
[0007] In the above-mentioned suspended double-chamber kiln without corbels and preventing stone accumulation, an annular circulation pipe is embedded inside the annular hanging beam, the bottom end of the tubular hanging column passes through and is fixedly connected to the annular circulation pipe, and the top end of the tubular hanging column passes through the side wall of the cavity and the top of the cooling cavity, and is fixed to the top of the cooling cavity by casting and / or welding.
[0008] Specifically, the top of the annular hanging beam is adapted to the bottom of the cavity, and the annular hanging beam is fixedly installed at the bottom of the cavity to support the cavity.
[0009] In the aforementioned suspended double-chamber kiln without corbels to prevent stone accumulation, the cavity is generally constructed using mortise and tenon joints with I-beam bricks. A gap is left on the cavity corresponding to the tubular hanging column for the installation of the tubular hanging column. The tubular hanging column is connected to the main body of the cavity by casting and anchoring.
[0010] Furthermore, the cavity is fixedly suspended at the top center of the cooling cavity via a tubular hanging column and an annular hanging beam.
[0011] In the above-mentioned suspended double-chamber kiln without corbels to prevent stone accumulation, the cooling chamber includes a main cooling chamber and an annular channel. The annular channel is located at the top of the main cooling chamber, and the suspended chamber is located in the middle of the annular channel.
[0012] Preferably, the annular channel has multiple cleaning holes, and the top of each cleaning hole is provided with a sealing cover.
[0013] In the above-mentioned suspended double-chamber kiln without corbels and preventing stone accumulation, the inner walls of the calcination chamber and the preheating chamber are both lined with refractory linings. The calcination chamber is fixedly mounted on the top of the suspended chamber, and the preheating chamber is fixedly mounted on the top of the calcination chamber. A furnace roof is provided on the top of the preheating chamber.
[0014] Preferably, the top of the junction between the wall of the symmetrically arranged cooling chamber and the wall of another cooling chamber is built with a stone-blocking partition wall, and a connecting channel is left above the stone-blocking partition wall.
[0015] Meanwhile, a cooling air duct is provided at the bottom of the main cooling chamber. After the cooling air duct is connected to the inside of the main cooling chamber, a double-layer air cap is provided at its end. The double-layer air cap is located at the middle position of the bottom of the main cooling chamber.
[0016] Furthermore, the tubular hanging column is a high-strength hollow tube, and there are twelve tubular hanging columns, of which six tubular hanging columns are air inlet pipes and six tubular hanging columns are air outlet pipes, with the air inlet pipes and air outlet pipes arranged alternately.
[0017] Specifically, the bottom of each tubular hanging column is connected to the annular circulation pipe via a tee joint.
[0018] Preferably, several anchors are distributed on the outside of the tubular column and on the annular circulation pipe.
[0019] Furthermore, the front ends of the anchors are distributed in a tree-branch pattern, and the anchors on the tubular column are arranged in an alternating manner along the vertical direction.
[0020] In the above-mentioned suspended double-chamber kiln without corbels to prevent stone accumulation, preferably, the main cooling chamber is constructed using wear-resistant high-quality refractory bricks; the refractory lining lining the inner wall of the calcination chamber is composite brown corundum refractory bricks; the refractory lining lining the inner wall of the preheating chamber is high-strength erosion-resistant refractory bricks; and the annular hanging beam is cast using high-strength erosion-resistant castable that does not require baking.
[0021] Compared with the prior art, the suspended double-chamber kiln without corbels and preventing stone accumulation of this utility model has at least the following beneficial effects:
[0022] 1. This utility model relates to a suspended, bracketless, anti-stone-accumulation double-chamber kiln. By employing a suspended cavity design, the cavity body is suspended from the top of the cooling chamber, significantly simplifying the support structure. The tubular hanging columns and ring-shaped hanging beams, as key components, provide strong suspension force and support, ensuring the stability of the entire system. This not only reduces construction costs but also effectively prevents collapse problems caused by complex support structures, guaranteeing the quality and output of lime production.
[0023] 2. This invention establishes a highly efficient heat exchange system by embedding a ring-shaped circulation pipe inside the suspended cavity and connecting it to twelve high-strength hollow tubular suspension columns (six for air inlet and six for air outlet). This staggered arrangement helps optimize airflow distribution and improves heat exchange efficiency. Furthermore, the design of the cooling ducts and double-layered air caps ensures that cool air is evenly distributed throughout the main cooling cavity, preventing localized overcooling or overheating. These optimization measures not only improve cooling efficiency but also reduce energy consumption and enhance the overall energy efficiency ratio.
[0024] 3. This utility model effectively avoids the occurrence of stone accumulation by building an anti-stone accumulation partition wall at the top of the junction of the symmetrically arranged cooling chamber walls and leaving a connecting channel above it. Attached Figure Description
[0025] Figure 1 This is a schematic diagram of the structure of the suspended double-chamber kiln without corbels to prevent stone accumulation according to this utility model;
[0026] Figure 2 This is a three-dimensional structural diagram showing the relative installation positions of the tubular hanging column and the annular circulation pipe of the suspended double-chamber kiln without corbels to prevent stone accumulation, according to this utility model.
[0027] Figure 3 yes Figure 1 A magnified schematic diagram of the structure at point A in the middle.
[0028] In the picture:
[0029] 1-Suspended cavity:
[0030] 101-Cavity; 102-Tube-shaped hanging column; 103-Annular hanging beam; 131-Annular circulation pipe;
[0031] 104 - Anchors;
[0032] 2-Cooling chamber:
[0033] 201 - Cooling main chamber, 211 - Cooling air duct, 212 - Double-layer air cap;
[0034] 202-Annular channel, 221-Dust removal hole, 222-Sealing cover;
[0035] 3- Calcination chamber; 4- Preheating chamber; 5- Refractory lining; 6- Furnace top; 7- Anti-stone accumulation partition wall. Detailed Implementation
[0036] The suspended double-chamber kiln without corbels and preventing stone accumulation of this utility model will be described in more detail below with reference to the accompanying drawings and specific embodiments.
[0037] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Example 1
[0038] This embodiment discloses a suspended, bracketless, anti-stone-accumulation double-chamber kiln. By setting up a suspended chamber, it solves the problems of high construction cost, easy collapse of support brackets, and impact on lime production quality and output in the prior art. See below for details.
[0039] See Figure 1 , Figure 3 It mainly includes a suspended chamber 1, a cooling chamber 2, a calcining chamber 3, and a preheating chamber 4. The suspended chamber 1, cooling chamber 2, calcining chamber 3, and preheating chamber 4 are each provided in two sets and are symmetrically positioned. The suspended chamber 1 is fixedly suspended at the top of the inner cavity of the cooling chamber 2, the calcining chamber 3 is located at the top of the suspended chamber 1, and the preheating chamber 4 is located at the top of the calcining chamber 3.
[0040] In this embodiment, the suspended cavity 1 is installed at the top of the inner cavity of the cooling cavity 2 by suspension. This not only simplifies the support structure and reduces construction costs, but also effectively prevents collapse, thereby avoiding any impact on the quality and output of lime production.
[0041] Cooling chamber 2 is mainly used for rapid cooling of calcined materials to stabilize product quality. Calcination chamber 3, located at the top of suspended chamber 1, is mainly used for high-temperature calcination of preheated materials. Preheating chamber 4, located at the top of calcination chamber 3, is used to preheat the raw materials about to enter the calcination chamber, increasing the initial temperature of the materials upon entry.
[0042] To achieve fixed suspension of the suspended cavity, see [reference needed]. Figure 1 , Figure 3 The suspended cavity 1 includes a cavity 101, a tubular hanging column 102, and an annular hanging beam 103. The tubular hanging column 102 is embedded inside the side wall of the cavity 101, and the annular hanging beam 103 is located at the bottom of the suspended cavity 1. The top end of the tubular hanging column 102 penetrates the top of the side wall of the cavity 101, and the cavity 101 is anchored as a whole to the middle position of the top of the cooling cavity 2 by the tubular hanging column 102.
[0043] In this embodiment, the cavity 101 is used to contain and process materials. The tubular hanging column 102 and the annular hanging beam 103 are key components for suspending the cavity 101, providing strong support and fixation. The annular hanging beam 103 is located at the bottom of the suspended cavity 1, used to lift and support the cavity 101, while providing additional suspension points to ensure the balance and stability of the entire structure.
[0044] To achieve the lifting effect of the ring-shaped suspension beam on the cavity and ensure support performance, see [reference needed]. Figure 1 , Figure 3 The annular hanging beam 103 has an embedded annular circulation pipe 131. The bottom end of the tubular hanging column 102 passes through and is fixedly connected to the annular circulation pipe 131. The top end of the tubular hanging column 102 passes through the side wall of the cavity 101 and the top of the cooling cavity 2, and is fixed to the top of the cooling cavity 2 by casting and / or welding. The top of the annular hanging beam 103 is adapted to the bottom of the cavity 101, and the annular hanging beam 103 is fixedly set at the bottom of the cavity 101 to support the cavity 101.
[0045] The tubular suspension column 102 extends from the inside of the side wall of the cavity 101 to the top of the cooling cavity 2 and is fixed by casting, ensuring that the cavity 101 is firmly suspended in the cooling cavity 2. The annular suspension beam 103 is located at the bottom of the cavity 101, and by fitting its top to the bottom of the cavity 101, it provides a stable support platform to prevent the cavity 101 from shifting or deforming during operation.
[0046] In this embodiment, the annular circulation pipe 131 is embedded inside the annular hanging beam 103, and the bottom end of the tubular hanging column 102 is connected through and fixedly connected to the annular circulation pipe 131. This structure not only enhances the overall integrity of the structure but also allows the annular hanging beam 103 to be tightly connected to the top of the cavity 101 and the cooling cavity 2 via the tubular hanging column 102, forming a stable suspension system.
[0047] The top end of the tubular hanging column 102 penetrates the side wall of the cavity 101 and the top of the cooling cavity 2, and is then fixed to the top of the cooling cavity 2 by casting and / or welding. This structure, combined with the annular circulation pipe 131 and the annular hanging beam 103, provides strong suspension force for the cavity 101, ensuring the stability of the cavity 101 under high temperature and heavy load conditions.
[0048] See Figure 1 The cooling chamber 2 includes a main cooling chamber 201 and an annular channel 202. The annular channel 202 is located at the top of the main cooling chamber 201, and the suspended chamber 1 is recessed and located in the middle of the annular channel 202. The annular channel 202 has multiple cleaning holes 221, and the top of each cleaning hole 221 is provided with a sealing cover 222.
[0049] In this embodiment, the main cooling chamber 201 is used to contain the high-temperature material coming down from the calcination chamber 3 and to rapidly cool it. The cleaning hole 221 allows operators to easily clean dust and other impurities from the annular channel, reducing maintenance costs and downtime. The sealing cover 222 ensures the system's airtightness and facilitates daily inspection and maintenance.
[0050] Through the above structure, the cooling main chamber 201 and the annular channel 202 achieve rapid and efficient cooling of high-temperature materials. The cleaning holes 221 and the sealing cover 222 on the annular channel 202 not only improve the maintainability of the system, but also ensure high efficiency during long-term operation.
[0051] See Figure 1 The inner walls of the calcination chamber 3 and the preheating chamber 4 are both lined with refractory linings 5. The calcination chamber 3 is fixedly mounted on the top of the suspended chamber 1, and the preheating chamber 4 is fixedly mounted on the top of the calcination chamber 3. A furnace top 6 is provided on the top of the preheating chamber 4.
[0052] In this embodiment, the calcination chamber 3 is fixedly mounted on top of the suspended chamber 1, directly receiving the preheated material from the preheating chamber 4 and subjecting it to high-temperature calcination. The preheating chamber 4 is fixedly mounted on top of the calcination chamber 3 to facilitate the preheating of the material. The furnace top 6 serves to seal and insulate the furnace, while also facilitating inspection and maintenance.
[0053] To ensure the long-term stable operation of the suspended, bracketless, anti-stone-accumulation double-chamber kiln under high temperature and high wear conditions, see [reference needed]. Figure 1 The cooling main cavity 201 is constructed using wear-resistant high-quality refractory bricks; the refractory lining 5 lining the inner wall of the calcination cavity 3 is made of composite brown corundum refractory bricks; the refractory lining 5 lining the inner wall of the preheating cavity 4 is made of high-strength erosion-resistant refractory bricks; and the annular hanging beam 103 is cast using high-strength erosion-resistant castable without baking.
[0054] In this embodiment, the wear-resistant high-quality refractory brick possesses excellent wear resistance and thermal shock resistance, enabling it to be used for extended periods under high-temperature conditions without significant damage. It not only protects the main structure of the cooling chamber 201 from wear and erosion but also enhances overall durability.
[0055] Composite brown fused alumina refractory bricks possess extremely high refractoriness (typically exceeding 1700°C) and exhibit excellent thermal shock resistance and chemical stability. They maintain structural integrity under extreme high temperatures, preventing material deformation or damage caused by heat.
[0056] High-strength erosion-resistant refractory bricks have high mechanical strength and impact resistance, and can withstand frequent impacts and abrasions from materials under high-temperature conditions while maintaining good thermal insulation performance. Example 2
[0057] The similarities to the above embodiments will not be repeated, the differences are as follows:
[0058] To further improve the stability of the tubular suspension column, see [link / reference]. Figure 1 , Figure 3 The cavity 101 is generally constructed using mortise and tenon joints. A gap is provided on the cavity 101 corresponding to the tubular hanging column 102 for installation of the tubular hanging column 102. The tubular hanging column 102 is anchored to the main body of the cavity 101 by casting. The cavity 101 is fixedly suspended at the top center of the cooling chamber 2 via the tubular hanging column 102 and the annular hanging beam 103.
[0059] In this embodiment, the cavity 101 is generally constructed using mortise and tenon joints. Through this structure, the mortise and tenon joints enhance the connection strength between the bricks by interlocking with each other, thereby improving the overall strength and stability of the structure, reducing the thermal bridge effect, and improving the thermal insulation performance.
[0060] The tubular suspension column 102 is connected to the main body of the cavity 101 by casting and anchoring. During the construction of the cavity 101, a gap is left at the tubular suspension column 102, and then it is fixed by casting mortar to ensure that it forms an integral whole with the cavity 101. The annular suspension beam 103 is located at the bottom of the cavity 101 and is connected to the tubular suspension column 102 through the annular circulation pipe 131 inside it, forming a complete suspension and support system, which can effectively enhance the system's balance and safety. Example 3
[0061] The similarities with the above embodiments and their combinations will not be repeated, the differences being:
[0062] To further optimize the cooling effect and prevent the formation of aggregates during the cooling process, see [link to relevant documentation]. Figure 1 The top of the junction between the wall of the symmetrically arranged cooling chamber 2 and the wall of another cooling chamber 2 is built with a stone-blocking partition wall 7, and a connecting channel is left above the stone-blocking partition wall 7.
[0063] A cooling duct 211 is provided at the bottom of the main cooling chamber 201. After the cooling duct 211 is connected to the interior of the main cooling chamber 201, a double-layer air cap 212 is provided at its end. The double-layer air cap 212 is located at the middle position of the bottom of the main cooling chamber 201.
[0064] During production and use, stones can easily accumulate in the middle passage. By using the anti-stone accumulation partition wall, the accumulation of stones can be effectively prevented, thus improving the stability and reliability of the system.
[0065] Cooling duct 211 introduces cold air into the main cooling chamber 201 for rapid cooling of high-temperature materials, significantly improving cooling efficiency. Double-layered air caps 212 ensure even distribution of cooling air within the main cooling chamber, preventing localized overcooling or overheating. This not only improves cooling efficiency but also reduces energy consumption, enhancing the overall energy efficiency ratio. Example 4
[0066] The similarities with the above embodiments and their combinations will not be repeated, the differences being:
[0067] See Figure 2 , Figure 3 The tubular hanging column 102 is a high-strength hollow tube, and there are twelve tubular hanging columns 102, of which six are air inlet ducts and six are air outlet ducts, with the air inlet and outlet ducts arranged alternately. The bottom of each tubular hanging column 102 is connected to the annular circulation duct 131 through a tee joint.
[0068] In this embodiment, the tubular hanging column 102 is made of high-strength hollow tube, which not only provides strong support but also allows gas to flow inside. In conjunction with the installation circulation pipe 131, it provides support while achieving efficient heat exchange.
[0069] It should be noted that there are twelve tubular hanging columns 102 in total, six of which serve as air inlet ducts and the other six as air outlet ducts, with the air inlet and outlet ducts arranged alternately. This alternate arrangement helps to optimize airflow distribution and improve heat exchange efficiency.
[0070] In addition, in this embodiment, the outlet of the air duct can be connected to a combustion air duct to assist combustion in the double boring furnace. This not only ensures more complete combustion in the furnace, but also further improves the efficiency of heat energy utilization and reduces energy consumption.
[0071] Meanwhile, in this embodiment, the entire cavity is divided into twelve equal parts by casting 12 tubular hanging columns 102, and each part is constructed by seven mortise and tenon I-beam bricks.
[0072] In the construction process of this utility model, the tubular hanging columns are fixed at the annular channel of the cooling cavity, and the bottom is connected to the annular circulation pipe. An annular hanging beam is poured at the annular circulation pipe, and the cavity is built on the annular hanging beam by means of mortise and tenon I-beam bricks. Then, high-strength erosion-resistant castable without baking is used for pouring construction to form twelve cast tubular hanging columns; thus forming a complete hanging cavity. Example 5
[0073] The similarities with the above embodiments and their combinations will not be repeated, the differences being:
[0074] To further enhance the structural stability and robustness of tubular suspension columns and annular circulation pipes, see [link to relevant documentation]. Figure 2 Several anchors 104 are distributed on the outside of the tubular column 102 and on the annular circulation pipe 131. The front ends of the anchors 104 are distributed in a tree-branch shape, and the anchors 104 on the tubular column 102 are arranged in an alternating position along the vertical direction.
[0075] In this embodiment, anchors 104 are provided on the outside of the tubular column 102 and on the annular circulation pipe 131, which can effectively enhance the connection strength and firmness of the tubular column 102 and the annular circulation pipe 131 when the tubular column 102 is poured and the annular hanging beam 103 is poured.
[0076] By arranging the anchors 104 in an alternating manner along the vertical direction, stress can be effectively dispersed, preventing structural failure caused by local stress concentration. The arrangement of the anchors 104 in the above-mentioned structure improves the pull-out resistance and overall stability.
[0077] The working principle of this utility model of a suspended double-chamber kiln without corbels and preventing stone accumulation is as follows: The material is first preheated in the preheating chamber 4 to increase its initial temperature, and then enters the calcination chamber 3 for high-temperature calcination. The high-temperature material after calcination falls into the main cooling chamber 201 of the cooling chamber 2, and is rapidly cooled by the cooling air duct 211 and double-layer air cap 212 set at the bottom. Throughout the process, the suspended chamber 1 is stably suspended from the top of the cooling chamber 2 by the tubular hanging column 102 and the annular hanging beam 103, and forms a high-efficiency heat exchange system with the tubular hanging column 102 through the internal annular circulation pipe 131, ensuring the stability and efficiency of the system. In addition, in order to prevent the material from accumulating stones during the cooling process, an anti-stone accumulation partition wall 7 is set at the junction of the cooling chamber 2 walls, and a connecting channel is left above it to maintain necessary circulation.
[0078] It should be noted that, in actual implementation, the structure depicted in the accompanying drawings is not a fixed or unchanging embodiment. The components of the embodiments of this invention described and shown in these drawings can typically be arranged and designed in various different configurations. Furthermore, the accompanying drawings and abstract drawings are merely illustrative and do not represent the specific structure or actual quantity in a concrete implementation.
[0079] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains. The use of terms such as "a" or "an" in this specification and claims does not necessarily indicate a limitation on quantity. Terms such as "comprising" or "including" mean that the element or component preceding the word encompasses the element or component listed following the word and its equivalents, without excluding other elements or components. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.
[0080] The exemplary embodiments of the present invention have been described in detail above with reference to preferred embodiments. However, those skilled in the art will understand that various modifications and alterations can be made to the above specific embodiments without departing from the concept of the present invention, and various combinations can be made to the various technical features and structures proposed by the present invention without exceeding the protection scope of the present invention.
Claims
1. A suspended, bracketless, anti-stone-accumulation double-chamber kiln, characterized in that: It includes a suspended chamber, a cooling chamber, a calcining chamber, and a preheating chamber. Each of the suspended chamber, cooling chamber, calcining chamber, and preheating chamber is provided in two sets and is symmetrically positioned. The suspended chamber is fixedly suspended at the top of the inner cavity of the cooling chamber, the calcining chamber is located at the top of the suspended chamber, and the preheating chamber is located at the top of the calcining chamber. The suspended cavity includes a cavity body, tubular hanging columns, and annular hanging beams. The tubular hanging columns are distributed inside the side wall of the cavity body, the annular hanging beams are located at the bottom of the suspended cavity, the top of the tubular hanging columns penetrates the top of the side wall of the cavity body, and the cavity body is anchored as a whole to the middle position of the top of the cooling cavity through the tubular hanging columns.
2. The suspended, bracketless, anti-stone-accumulation double-chamber kiln according to claim 1, characterized in that: The annular hanging beam is embedded with an annular circulation pipe. The bottom end of the tubular hanging column passes through and is fixedly connected to the annular circulation pipe. The top end of the tubular hanging column passes through the side wall of the cavity and the top of the cooling cavity, and is fixed to the top of the cooling cavity by casting and / or welding. The top of the annular hanging beam is adapted to the bottom of the cavity, and the annular hanging beam is fixedly installed at the bottom of the cavity to support the cavity.
3. The suspended, bracketless, anti-stone-accumulation double-chamber kiln according to claim 2, characterized in that: The cavity is constructed using mortise and tenon joints with I-beam bricks. A gap is left on the cavity corresponding to the tubular hanging column for the installation of the tubular hanging column. The tubular hanging column is connected to the main body of the cavity by casting and anchoring. The cavity is fixedly suspended at the top center of the cooling cavity via a tubular hanging column and an annular hanging beam.
4. The suspended, bracketless, anti-stone-accumulation double-chamber kiln according to claim 3, characterized in that: The cooling chamber includes a main cooling chamber and an annular channel. The annular channel is located at the top of the main cooling chamber, and the suspended chamber is located in the middle of the annular channel. The annular channel has multiple cleaning holes, and each cleaning hole is covered with a sealing cap.
5. The suspended, bracketless, anti-stone-accumulation double-chamber kiln according to claim 4, characterized in that: The inner walls of both the calcination chamber and the preheating chamber are lined with refractory linings. The calcination chamber is fixedly mounted on the top of the suspended chamber, and the preheating chamber is fixedly mounted on the top of the calcination chamber. A furnace roof is provided on the top of the preheating chamber.
6. The suspended, bracketless, anti-stone-accumulation double-chamber kiln according to claim 4, characterized in that: The top of the junction between the wall of the symmetrically arranged cooling chamber and the wall of another cooling chamber is built with a stone-blocking partition wall, and a connecting channel is left above the stone-blocking partition wall. A cooling duct is provided at the bottom of the main cooling chamber. After the cooling duct is connected to the interior of the main cooling chamber, a double-layered air cap is provided at its end. The double-layered air cap is located at the middle position of the bottom of the main cooling chamber.
7. The suspended, bracketless, anti-stone-accumulation double-chamber kiln according to claim 2, characterized in that: The tubular hanging column is a high-strength hollow tube. There are twelve tubular hanging columns, of which six are air inlet pipes and six are air outlet pipes. The air inlet pipes and air outlet pipes are arranged alternately. The bottom of each tubular hanging column is connected to the annular circulation pipe via a tee joint.
8. The suspended, bracketless, anti-stone-accumulation double-chamber kiln according to claim 7, characterized in that: Several anchors are distributed on the outside of the tubular hanging column and on the annular circulation pipe.
9. The suspended, bracketless, anti-stone-accumulation double-chamber kiln according to claim 8, characterized in that: The anchors are arranged in a tree-branch-like pattern at their front ends, and the anchors on the tubular column are arranged in an alternating manner along the vertical direction.
10. The suspended, bracketless, anti-stone-accumulation double-chamber kiln according to claim 5, characterized in that: The cooling main cavity is constructed using wear-resistant high-quality refractory bricks; the refractory lining of the inner wall of the calcination cavity is composite brown corundum refractory bricks; the refractory lining of the inner wall of the preheating cavity is high-strength erosion-resistant refractory bricks; and the annular hanging beam is cast using high-strength erosion-resistant castable that does not require baking.