Hanging type bracket-free stone accumulation prevention double-hearth kiln and construction method thereof

Abstract

The invention relates to the field of double-chamber kilns, in particular to a hanging type bracket-free stone accumulation prevention double-chamber kiln which comprises two sets of hanging type cavities, two sets of cooling cavities, two sets of calcining cavities and two sets of preheating cavities, the hanging type cavities are fixedly arranged at the tops of inner cavities of the cooling cavities in a hanging mode, and the calcining cavities and the preheating cavities are symmetrical in position. The calcining cavity is arranged at the top of the hanging type cavity, the preheating cavity is arranged at the top of the calcining cavity, and the hanging type cavity comprises a cavity body, a tubular hanging column and an annular hanging beam; according to the hanging type bracket-free stone accumulation prevention double-hearth kiln, the cavity is hung at the top of the inner cavity of the cooling cavity by adopting the design of the hanging type cavity, so that the supporting structure is obviously simplified; the tubular hanging column and the annular hanging beam serve as key assemblies, strong hanging force and a supporting effect are provided, and the stability of the whole system is ensured. Not only is the construction cost reduced, but also the collapse problem caused by a complex supporting structure is effectively prevented, and the quality and yield of lime production are guaranteed.

Description

Technical Field

[0001] The invention belongs to the field of double-chamber kilns, and particularly relates to a hanging type double-chamber kiln without corbels and preventing stone accumulation and a construction method thereof. Background Art

[0002] The double-bore kiln is also called a double-bore parallel flow regenerative lime kiln. The fuel is fed from the upper end of the calcining zone and flows parallel to the raw materials. Since the fuel is sprayed from the upper part of the calcining zone, the raw materials can absorb most of the heat released by the fuel here. In addition, the temperature of the calcining zone is an average of 950°C. Another important feature of the double-bore kiln is heat storage, which uses heat storage to preheat a part of the combustion air. The thermal characteristics of parallel flow calcination and countercurrent heat storage determine that the double-bore kiln has high thermal efficiency. Its heat energy consumption is lower than all types of lime kilns such as rotary kilns and sleeve kilns.

[0003] In the existing technology, traditional double-chamber kilns usually require complex supporting structures to maintain the stability and safety of each functional chamber, which increases the construction cost. During use, the corbels used to support the inner cylinder are easily damaged, causing the inner cylinder to collapse easily. After the inner cylinder and the corbels collapse, the burning quality and output of lime are affected. Therefore, how to overcome the above-mentioned technical problems and defects has become a key issue that needs to be solved. Summary of the Invention

[0004] The purpose of the present invention is to overcome the defects described in the background technology, thereby realizing a suspended double-chamber kiln without corbels and preventing stone accumulation, so as to solve the problems in the prior art such as high cost of construction of complex supporting structures, easy collapse of supporting corbels, and influence on the quality and output of lime production.

[0005] To achieve the above-mentioned purpose of the invention, the technical solution of the present invention is: a hanging type double-chamber kiln with no corbels and anti-stone accumulation, comprising a hanging chamber, a cooling chamber, a calcining chamber and a preheating chamber, wherein the hanging chamber, the cooling chamber, the calcining chamber and the preheating chamber are each provided in two groups and are symmetrically positioned, the hanging chamber is fixedly suspended at the top of the inner cavity of the cooling chamber, the calcining chamber is provided at the top of the hanging chamber, and the preheating chamber is provided at the top of the calcining chamber.

[0006] Specifically, the hanging cavity includes a cavity, a tubular hanging column and an annular hanging beam. The tubular hanging columns are dispersed inside the side wall of the cavity, the annular hanging beam is located at the bottom of the hanging cavity, the top of the tubular hanging column passes through the top of the cavity side wall, and the cavity is anchored as a whole to the middle position of the top of the cooling cavity through the tubular hanging column.

[0007] In the above-mentioned hanging type double-chamber kiln without corbels and anti-stone accumulation, an annular circulation pipe is embedded in 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 specifications of the bottom of the cavity, and the annular hanging beam is fixedly arranged at the bottom of the cavity to support the cavity.

[0009] In the above-mentioned hanging type double-chamber kiln without corbels and preventing stone accumulation, the cavity is generally constructed by mortise and tenon I-shaped bricks, and gaps for installing tubular hanging columns are left at the corresponding positions of the tubular hanging columns on the cavity. The tubular hanging columns are connected to the cavity body by pouring anchors.

[0010] Furthermore, the cavity is fixedly suspended in the middle position of the top of the cooling cavity by cooperating with the annular hanging beam through a tubular hanging column.

[0011] In the above-mentioned hanging type double-chamber kiln without corbels and anti-stone accumulation, the cooling chamber includes a cooling main chamber and an annular channel. The annular channel is arranged at the top of the cooling main chamber, and the hanging chamber is sunken in the middle of the annular channel.

[0012] Preferably, a plurality of ash cleaning holes are provided on the annular channel, and a closing cover is provided on the top of the ash cleaning holes.

[0013] In the above-mentioned suspended double-chamber kiln without corbels and anti-stone accumulation, the inner walls of the calcining chamber and the preheating chamber are both paved with refractory linings, the calcining chamber is fixedly seated on the top of the suspended chamber, and the preheating chamber is fixedly seated on the top of the calcining chamber, and a furnace top is provided on the top of the preheating chamber.

[0014] Preferably, a stone-preventing partition wall is built on the top of the junction between the cavity wall of the symmetrically arranged cooling cavity and the cavity wall of another cooling cavity, and a connecting channel is left above the stone-preventing partition wall.

[0015] At the same time, a cooling air duct is provided at the bottom of the main cooling cavity. After the cooling air duct is connected to the inside of the main cooling cavity, a double-layer air hood is provided at its end. The double-layer air hood is provided in the middle position of the bottom of the main cooling cavity.

[0016] Furthermore, the tubular suspension columns are high-strength hollow tubes, and there are twelve tubular suspension columns, among which six tubular suspension columns are air inlet ducts and six tubular suspension columns are air outlet ducts, and the air inlet ducts and the air outlet ducts are staggered.

[0017] Specifically, the bottoms of the tubular suspension columns are connected to the annular circulation pipeline through three-way joints.

[0018] Preferably, a plurality of anchors are distributed on the outside of the tubular suspension column and the annular circulation pipe.

[0019] Furthermore, the front ends of the anchors are dispersedly arranged in a tree-branch shape, and the anchors on the tubular suspension column are arranged in staggered positions along the up and down directions.

[0020] In the above-mentioned hanging type double-chamber kiln without corbels and anti-stone accumulation, preferably, the cooling main chamber is constructed by stacking wear-resistant high-quality refractory bricks; the refractory lining laid on the inner wall of the calcining chamber is composite brown corundum refractory bricks, and the refractory lining laid on the inner wall of the preheating chamber is high-strength scour-resistant refractory bricks, and the annular hanging beam is cast by baking-free high-strength scour-resistant castable.

[0021] The present invention also discloses a construction method for a hanging type double-chamber kiln without a corbel and preventing stone accumulation, which is used to construct the above-mentioned hanging type double-chamber kiln without a corbel and preventing stone accumulation. The construction method comprises the following steps: Step 1: Foundation pouring: Use castables to pour the foundation platform, with a surface flatness error of ≤2mm / m, and pre-buried cooling duct interfaces.

[0022] Step 2: Construct the main cooling chamber. The inner wall is constructed with high-strength, erosion-resistant refractory bricks and filled with refractory slurry, with a masonry density of ≥98%. A double-layer hood is pre-installed at the bottom of the main cooling chamber. The double-layer hood is welded to the cooling air duct and then tested for air tightness. Step 3: Build the annular channel; build the annular channel on the top of the cooling main chamber, reserve a ash cleaning hole on the annular channel, and install a closing cover on the ash cleaning hole.

[0023] Step 4: Pre-embed and position the hanging columns: Twelve high-strength hollow tubular hanging columns are pre-embedded along the inner circumference of the annular channel at the top of the masonry cooling chamber, with a verticality error of ≤1°. Six of the 12 tubular hanging columns serve as air inlets and six as air outlets, arranged in a staggered pattern. Their tops are welded to the pre-embedded steel plates and reinforced with a secondary pour of high-temperature-resistant castable.

[0024] Step 5: Cast the looped circulation pipe and hanging beam. Connect the tubular hanger column to the looped circulation pipe via a tee joint. Weld the joint. Simultaneously, weld branch-shaped anchors to the surface of the looped circulation pipe. After full welding, test the tubular hanger column and the looped circulation pipe for airtightness. Set up formwork at the looped circulation pipe and cast the looped hanging beam using a bake-free, high-strength, erosion-resistant castable. After casting, allow natural curing. Weld branch-shaped anchors to the surface of the tubular hanger column to enhance its bond with the castable.

[0025] Step 6: Cavity masonry; use mortise and tenon I-shaped bricks for spiral masonry, with each layer staggered by 1 / 2 brick length, and 5mm expansion joints reserved between bricks; after each 1m height of masonry, inject high-temperature resistant castable into the gaps between the tubular hanging columns for curing, and the curing time is >24 hours.

[0026] Step 7: Calcination chamber and preheating chamber masonry; build the calcination chamber and preheating chamber, lay composite brown corundum bricks on the inner wall of the calcination chamber, and spray anti-oxidation coating; the preheating chamber adopts gradient masonry, and the furnace roof is built on the top of the preheating chamber.

[0027] Step 8: Construction of anti-stone accumulation partition wall; build an inclined anti-stone accumulation partition wall at the junction of the cooling cavity, and reserve a connecting channel on the top.

[0028] Step 9: System debugging; connect the air inlet ducts in the 12 tubular suspension columns to the variable frequency blower; connect the air outlet ducts to the combustion-supporting system; control the system air pressure at 2-3kPa, and test the uniformity of air flow distribution.

[0029] Full load static load test; load ≥ 1.2 times the design value, lasting 2 hours, deformation ≤ 2mm / m.

[0030] Hot performance verification: gradually increase the temperature of the preheating chamber to 800°C at a rate of 200°C / h, then increase the temperature of the calcining chamber to 1200°C at a rate of 300°C / h, and maintain a constant temperature for 24 hours.

[0031] Compared with the prior art, the hanging type double-chamber kiln without corbels and preventing stone accumulation of the present invention has at least the following beneficial effects: 1. This invention's suspended, corbel-free, stone-accumulation-resistant double-chamber kiln utilizes a suspended chamber design, suspending the chamber from the top of the cooling chamber, significantly simplifying the support structure. Key components, tubular suspension columns and annular suspension beams, provide strong suspension and support, ensuring overall system stability. This not only reduces construction costs but also effectively prevents collapse associated with complex support structures, ensuring high-quality lime production and yield.

[0032] 2. This invention forms a highly efficient heat exchange system by embedding a circular circulation duct within the hanging cavity and connecting twelve high-strength hollow tubular hangers (six of which serve as air inlet ducts and six as air outlet ducts). This staggered arrangement helps optimize airflow distribution and improve heat exchange efficiency. Furthermore, the design of the cooling duct and double-layer hood ensures that cool air is evenly distributed throughout the main cooling cavity, avoiding localized overcooling or overheating. These optimization measures not only improve cooling efficiency but also reduce energy consumption, thereby enhancing the overall energy efficiency ratio.

[0033] 3. The present invention effectively avoids the occurrence of stone accumulation by building anti-stone accumulation partition walls on the top of the symmetrically arranged cooling chamber wall intersections and leaving connecting passages above them. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 2. It is a structural schematic diagram of a hanging type double-chamber kiln without corbels and preventing stone accumulation according to the present invention; Figure 2 This is a schematic diagram of the relative installation positions of the tubular hanging columns and the annular circulation pipeline of the hanging type corbel-free anti-stone accumulation double-chamber kiln of the present invention; Figure 3 yes Figure 1A magnified schematic diagram of the structure at point A.

[0035] In the picture: 1- Hanging cavity: 101- cavity; 102- tubular hanging column; 103- annular hanging beam, 131- annular circulation pipe; 104-anchor; 2-Cooling chamber: 201- cooling main chamber, 211- cooling air duct, 212- double-layer air hood; 202-annular channel, 221-ash cleaning hole, 222-closing cover; 3-Calcination chamber; 4-Preheating chamber; 5-Refractory lining; 6-Furnace top; 7-Anti-stone accumulation partition wall. DETAILED DESCRIPTION

[0036] The following describes the hanging type double-chamber kiln without corbels and preventing stone accumulation of the present invention in more detail with reference to the accompanying drawings and through specific embodiments.

[0037] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention. Example 1

[0038] This embodiment discloses a suspended, corbel-free, stone-accumulation-resistant double-chamber kiln. By providing a suspended chamber, this solves the existing problems of high construction costs associated with complex support structures, prone to collapse of supporting corbels, and the resulting impact on lime production quality and output. See below for details.

[0039] See also Figure 1 、 Figure 3 It mainly includes a hanging chamber 1, a cooling chamber 2, a calcining chamber 3 and a preheating chamber 4. The hanging chamber 1, the cooling chamber 2, the calcining chamber 3 and the preheating chamber 4 are each provided in two groups and are symmetrically positioned. The hanging chamber 1 is fixedly suspended at the top of the inner cavity of the cooling chamber 2, the calcining chamber 3 is provided at the top of the hanging chamber 1, and the preheating chamber 4 is provided at the top of the calcining chamber 3.

[0040] In this embodiment, the hanging chamber 1 is suspended and installed on the top of the inner cavity of the cooling chamber 2. This not only simplifies the support structure and reduces the construction cost, but also effectively prevents collapse, thereby avoiding affecting the quality and output of lime production.

[0041] Cooling chamber 2 is primarily used to rapidly cool the calcined material to stabilize product quality. Calcination chamber 3, located at the top of hanging chamber 1, is primarily used to calcine the preheated material at high temperature. Preheating chamber 4, located at the top of calcination chamber 3, is used to preheat incoming raw materials, raising their initial temperature upon entry.

[0042] To achieve fixed hanging of the hanging cavity, see Figure 1 、 Figure 3 The hanging cavity 1 includes a cavity 101, a tubular hanging column 102 and an annular hanging beam 103. The tubular hanging column 102 is buried inside the side wall of the cavity 101, and the annular hanging beam 103 is located at the bottom of the hanging cavity 1. The top of the tubular hanging column 102 passes through 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 through the tubular hanging column 102.

[0043] In this embodiment, chamber 101 is used to hold and process materials. The tubular suspender 102 and the annular hanging beam 103 are key components for suspending chamber 101, providing strong support and anchoring. Located at the bottom of the suspended chamber 101, the annular hanging beam 103 is used to lift and support chamber 101, while also providing an additional suspension point to ensure the balance and stability of the entire structure.

[0044] In order to achieve the support of the cavity by the ring hanging beam and ensure the supporting performance, see Figure 1 、 Figure 3 The annular hanging beam 103 is embedded with an 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 specifications of the bottom of the cavity 101. The annular hanging beam 103 is fixedly installed at the bottom of the cavity 101 and supports the cavity 101.

[0045] Tubular suspension columns 102 extend from the sidewalls of chamber 101 to the top of cooling chamber 2 and are cast in place, ensuring that chamber 101 is securely suspended within cooling chamber 2. Ring-shaped hanging beams 103 are located at the bottom of chamber 101. With their tops adapted to the dimensions of the bottom of chamber 101, they provide a stable support platform, preventing displacement or deformation of chamber 101 during operation.

[0046] In this embodiment, the annular circulation pipe 131 is embedded in the annular suspension beam 103, and the bottom end of the tubular suspension column 102 passes through and is fixedly connected to the annular circulation pipe 131. This structure not only enhances the structural integrity, but also enables the annular suspension beam 103 to be tightly connected to the cavity 101 and the top of the cooling chamber 2 through the tubular suspension column 102, forming a stable suspension system.

[0047] The top of the tubular suspension 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 suspension beam 103, provides a strong suspension force for the cavity 101, ensuring the stability of the cavity 101 under high temperature and heavy load conditions.

[0048] See also Figure 1 The cooling chamber 2 includes a main cooling chamber 201 and an annular channel 202. The annular channel 202 is provided at the top of the main cooling chamber 201, and the hanging chamber 1 is sunken in the middle of the annular channel 202. The annular channel 202 is provided with a plurality of cleaning holes 221, and the tops of the cleaning holes 221 are provided with sealing covers 222.

[0049] In this embodiment, the main cooling chamber 201 is used to receive and rapidly cool the high-temperature material discharged from the calcining chamber 3. The provision of ash cleaning holes 221 allows operators to conveniently remove dust and other impurities from the annular channel, reducing maintenance costs and downtime. The provision of a sealing cover 222 ensures the system's airtightness and facilitates routine 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 ash 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 in long-term operation.

[0051] See also Figure 1 The inner walls of the calcining chamber 3 and the preheating chamber 4 are both paved with refractory linings 5. The calcining chamber 3 is fixedly seated on the top of the hanging chamber 1, and the preheating chamber 4 is fixedly seated on the top of the calcining chamber 3. A furnace top 6 is provided on the top of the preheating chamber 4.

[0052] In this embodiment, calcining chamber 3 is fixedly mounted on the top of the hanging chamber 1, directly receiving the preheated material from the preheating chamber 4 and calcining it at high temperature. The preheating chamber 4 is fixedly mounted on the top of calcining chamber 3 to facilitate preheating of the material. The furnace roof 6 provides sealing and insulation, while also facilitating easy inspection and maintenance.

[0053] In order to ensure the long-term stable operation of the suspended double-chamber kiln without brackets and anti-stone accumulation in high temperature and high wear environment, see Figure 1 The cooling main chamber 201 is built with wear-resistant high-quality refractory bricks; the refractory lining 5 laid on the inner wall of the calcining chamber 3 is a composite brown corundum refractory brick, and the refractory lining 5 laid on the inner wall of the preheating chamber 4 is a high-strength scour-resistant refractory brick. The annular hanging beam 103 is cast by baking-free high-strength scour-resistant castable.

[0054] In this embodiment, the wear-resistant high-quality refractory bricks have excellent wear resistance and thermal shock resistance, and can be used for a long time under high temperature conditions without being easily damaged. It not only protects the main structure of the cooling main chamber 201 from wear and erosion, but also improves the overall durability.

[0055] Composite brown corundum refractory bricks have extremely high refractory temperatures (usually exceeding 1700°C) and possess good thermal shock resistance and chemical stability. They can maintain structural integrity under extremely high temperatures, preventing material deformation or damage caused by high temperatures.

[0056] High-strength erosion-resistant refractory bricks have high mechanical strength and impact resistance, and can withstand frequent impact and wear of materials under high temperature conditions while maintaining good thermal insulation performance.

[0057] In addition, this embodiment also discloses a construction method for constructing the above-mentioned hanging type double-chamber kiln without corbels and anti-stone accumulation, and the detailed steps of the construction method are as follows: Step 1: Foundation pouring: Use steel fiber castable or high-strength wear-resistant castable to cast the foundation platform, with a surface flatness error of ≤2mm / m, pre-embed the cooling duct interface and hanging beam support anchor bolts, and a positioning accuracy of ≤2mm.

[0058] Step 2: Cooling main cavity masonry; the inner wall adopts high-strength erosion-resistant refractory bricks, among which Al2O3 ≥ 85%, compressive strength ≥ 80MPa, when the inner wall is masonry, the mortar joint thickness ≤ 3mm, and the mortar joint is filled with refractory mud, among which Al2O3 ≥ 80%; the masonry density ≥ 98%.

[0059] The double-layer hood is embedded in the bottom, and the air tightness test is performed after the hood and cooling air duct are welded; Step 3: Build the annular channel; build the annular channel on the top of the cooling main chamber, reserve the ash cleaning hole, and install the calcium silicate board sealing cover. The sealing board has a temperature resistance of ≥1600℃; Step 4: Pre-embed and position the suspension columns: Pre-embed 12 high-strength hollow tubular suspension columns in the center of the annular channel at the top of the cooling chamber, with a verticality error of ≤1°; Among them, 6 are air inlet pipes and 6 are air outlet pipes, which are arranged in a staggered manner. The top ends are welded and fixed to the embedded steel plates, and reinforced with high-temperature resistant castables for a second time. Step 5: Cast the annular circulation pipe and the hanging beam; connect the bottom end of the tubular hanging column to the annular circulation pipe through a tee joint, use argon arc welding to weld, and weld the tree-branch anchors on the surface of the annular circulation pipe. After full welding, perform an airtightness test on the tubular hanging column and the annular circulation pipe; after full welding, perform an airtightness test; Formwork is provided at the annular circulation pipeline, and an annular hanging beam is cast using a baking-free high-strength scour-resistant castable, wherein the high-strength scour-resistant castable has Al2O3 ≥ 80% and a flexural strength ≥ 15MPa, and is naturally cured for 72 hours after casting.

[0060] The surface of the tubular suspender is welded with branch-shaped anchors to enhance the bonding strength with the castable. The anchors are staggered up and down to enhance the bonding strength with the castable. Step six: Cavity masonry: Use mortise and tenon I-shaped bricks for spiral masonry. The mortise and tenon I-shaped bricks are made of composite brown corundum. When laying, each layer is staggered by 1 / 2 brick length, and 5mm expansion joints are reserved between bricks.

[0061] After every 1m of masonry, high temperature resistant castables are injected into the gaps between the tubular columns and cured for 24 hours. The heat resistance of the high temperature resistant castables must be ≥1600℃. Step seven: calcination chamber and preheating chamber masonry; build calcination chamber and preheating chamber, lay composite brown corundum bricks on the inner wall of calcination chamber, spray anti-oxidation coating; preheating chamber adopts gradient masonry, and build furnace roof on the top of preheating chamber.

[0062] Step 8: Construction of anti-stone accumulation partition wall; build inclined anti-stone accumulation partition wall at the junction of symmetrical cooling chambers, and reserve a connecting channel at the top.

[0063] Step 9: System debugging: The air inlet ducts in the 12 tubular suspenders are connected to the variable frequency blower, with an air volume of ≥5000m³ / h and a wind speed of 15m / s; the air outlet ducts are connected to the combustion-supporting system, with a wind speed of 12m / s; The system air pressure is controlled at 2-3kPa, and the air flow distribution uniformity is tested (deviation ≤ 10%).

[0064] Full load static load test; load ≥ 1.2 times the design value, lasting 2 hours, deformation ≤ 2mm / m; Hot performance verification: gradually increase the temperature of the preheating chamber to 800°C at a rate of 200°C / h, then increase the temperature of the calcining chamber to 1200°C at a rate of 300°C / h, and maintain a constant temperature for 24 hours. Example 2

[0065] The same points as the above embodiment are not repeated here, but the differences are as follows: To further improve the fixation of the tubular davit, see Figure 1 、 Figure 3The cavity 101 is constructed using mortise and tenon I-shaped bricks. A gap is left on the cavity 101 corresponding to the tubular suspension column 102 for installation. The tubular suspension column 102 is connected to the cavity 101 body through a cast anchor. The cavity 101 is fixedly suspended in the middle of the top of the cooling chamber 2 via the tubular suspension column 102 and the annular suspension beam 103.

[0066] In this embodiment, the cavity 101 is generally constructed by mortise and tenon I-shaped bricks. Through this structure, the mortise and tenon structure enhances the connection strength between bricks by interlocking with each other, improves the overall strength and stability of the structure, reduces the thermal bridge effect, and improves the thermal insulation performance.

[0067] Tubular suspenders 102 are connected to the main body of cavity 101 by cast anchoring. During the construction of cavity 101, gaps are left around tubular suspenders 102, and then cast and fixed with castable material, ensuring they form a single unit with cavity 101. Annular hanging beams 103, located at the bottom of cavity 101, are connected to tubular suspenders 102 via an internal annular circulation pipe 131, forming a complete suspension and support system that effectively enhances the system's balance and safety. Example 3

[0068] The similarities with the above embodiments and their combinations are not repeated here, and the differences are as follows: To further optimize the cooling effect and prevent the material from accumulating stones during the cooling process, see Figure 1 A stone-preventing partition wall 7 is built on the top of the junction where the cavity wall of the symmetrically arranged cooling cavity 2 and the cavity wall of another cooling cavity 2 meet, and a connecting channel is left above the stone-preventing partition wall 7.

[0069] A cooling air duct 211 is provided at the bottom of the main cooling cavity 201 . After the cooling air duct 211 is connected to the interior 201 of the main cooling cavity, a double-layered air hood 212 is provided at the end thereof. The double-layered air hood 212 is provided in the middle position of the bottom of the main cooling cavity 201 .

[0070] During the production and use of the anti-stone accumulation partition wall 7, stones are easily accumulated in the middle channel. The anti-stone accumulation partition wall can effectively prevent the accumulation of stones, thereby improving the stability and reliability of the system.

[0071] The cooling air duct 211 draws cold air into the main cooling chamber 201, rapidly cooling high-temperature materials and significantly improving cooling efficiency. The double-layered air hood 212 evenly distributes the cooling air within the main cooling chamber, preventing localized overcooling or overheating. This not only improves cooling efficiency but also reduces energy consumption, enhancing overall energy efficiency. Example 4

[0072] The similarities with the above embodiments and their combinations are not repeated here, and the differences are as follows: See also Figure 2 、 Figure 3 The tubular hangers 102 are high-strength hollow tubes. Twelve of them are provided, with six serving as air inlet ducts and six serving as air outlet ducts. The air inlet and outlet ducts are arranged alternately. The bottoms of the tubular hangers 102 are connected to the annular circulation duct 131 via tee joints.

[0073] In this embodiment, the tubular suspension column 102 is made of a high-strength hollow tube, which not only provides strong supporting force, but also allows gas to circulate inside it. By cooperating with the installed circulation pipe 131, efficient heat exchange is achieved while providing supporting force.

[0074] It should be noted that there are twelve tubular suspension columns 102, six of which serve as air inlet ducts and the other six as air outlet ducts, and the air inlet ducts and the air outlet ducts are arranged in a staggered manner. This staggered arrangement helps optimize air flow distribution and improve heat exchange efficiency.

[0075] In addition, in this embodiment, the outlet of the air outlet duct can be connected to the combustion-supporting air duct to support the combustion of the double boring furnace, which can not only ensure more complete combustion in the furnace, but also further improve the utilization efficiency of thermal energy and reduce energy consumption.

[0076] At the same time, in this embodiment, the 12 hanging columns formed by casting the tubular hanging columns 102 divide the entire cavity into twelve equal parts, and each part is built with seven mortise and tenon I-shaped bricks.

[0077] During the construction process of the present invention, the tubular hanging column is fixed to the annular channel of the cooling cavity, the bottom is connected to the annular circulation pipe, the annular hanging beam is cast at the annular circulation pipe, the cavity is built on the annular hanging beam through mortise and tenon I-shaped bricks, and then the baking-free high-strength and erosion-resistant castable is used for casting construction to form twelve cast tubular hanging columns; thus, a complete hanging cavity is formed. Example 5

[0078] The similarities with the above embodiments and their combinations are not repeated here, and the differences are as follows: In order to further enhance the structural stability and firmness of the tubular suspenders and the annular circulation pipes, see Figure 2 A plurality of anchors 104 are distributed on the outside of the tubular suspender 102 and the annular circulation pipe 131. The front ends of the anchors 104 are dispersed in a tree-like shape, and the anchors 104 on the tubular suspender 102 are arranged in staggered positions along the up and down directions.

[0079] In this embodiment, anchors 104 are provided on the outside of the tubular hanger 102 and the annular circulation pipe 131, which can effectively enhance the connection strength and firmness of the tubular hanger 102 and the annular circulation pipe 131 when casting the tubular hanger 102 and the annular hanging beam 103.

[0080] By staggering the anchors 104 in the vertical direction, stress can be effectively dispersed to prevent structural failure caused by local stress concentration. By arranging the anchors 104 in the above structure, the pull-out resistance and overall stability are improved.

[0081] The working principle of the suspended double-chamber kiln with no corbels and anti-stone accumulation of the present invention is as follows: the material is first preheated in the preheating chamber 4 to increase its initial temperature, and then enters the calcining chamber 3 for high-temperature calcination treatment; the high-temperature material after calcination falls into the cooling main chamber 201 of the cooling chamber 2, and is rapidly cooled by the cooling air duct 211 and the double-layer air hood 212 arranged at the bottom; during the whole process, the suspended chamber 1 is firmly suspended on the top of the cooling chamber 2 by the tubular suspension column 102 and the annular suspension beam 103, and forms an efficient heat exchange system with the tubular suspension 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 stoning during the cooling process, an anti-stone accumulation partition wall 7 is set at the intersection of the cavity wall of the cooling chamber 2, and a connecting channel is left above it to maintain necessary circulation.

[0082] It should be noted that the structures depicted in the drawings herein are not fixed, unchangeable implementations of the present invention in practice. The components of the embodiments of the present invention generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations. Furthermore, the drawings in this specification and the abstract are schematic only and do not represent the specific structure or actual quantities of the components in practice.

[0083] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by persons of ordinary skill in the field to which the invention belongs. The use of "one" or "an" and other similar words in the specification and claims of this application does not necessarily indicate a quantitative limitation. "Include" or "comprising" and other similar words mean that the elements or parts preceding the word include the elements or parts listed after the word and their equivalents, without excluding other elements or parts. "Connect" or "connected" and other similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0084] The exemplary embodiments of the present invention are described in detail above with reference to preferred embodiments. However, it will be understood by those skilled in the art that, without departing from the concept of the present invention, various variations and modifications may be made to the above-mentioned specific embodiments, and various combinations of the various technical features and structures proposed in the present invention may be made without exceeding the scope of protection of the present invention.

Claims

1. A hanging type double-chamber kiln without brackets and preventing stone accumulation, characterized by: It includes a hanging chamber, a cooling chamber, a calcining chamber and a preheating chamber. The hanging chamber, cooling chamber, calcining chamber and preheating chamber are each provided in two groups and are symmetrically positioned. The hanging chamber is fixedly suspended on the top of the cooling chamber, the calcining chamber is provided on the top of the hanging chamber, and the preheating chamber is provided on the top of the calcining chamber. The hanging cavity includes a cavity, a tubular hanging column and an annular hanging beam. The tubular hanging columns are dispersed inside the side wall of the cavity, the annular hanging beam is located at the bottom of the hanging cavity, the top of the tubular hanging column passes through the top of the cavity side wall, and the cavity is anchored as a whole to the middle position of the top of the cooling cavity through the tubular hanging column.

2. The hanging type double-chamber kiln without corbels and preventing stone accumulation according to claim 1 is characterized in that: An annular circulation pipe is embedded in 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; The top of the annular hanging beam is adapted to the specifications of the bottom of the cavity, and the annular hanging beam is fixedly arranged at the bottom of the cavity to lift the cavity.

3. The hanging type double-chamber kiln without corbels and preventing stone accumulation according to claim 2 is characterized in that: The cavity is generally constructed by mortise and tenon I-shaped bricks, and gaps for installing tubular suspenders are left at locations corresponding to the tubular suspenders on the cavity. The tubular suspenders are connected to the cavity body by pouring and anchoring. The cavity is matched with the annular hanging beam through a tubular hanging column and is fixedly hung at the middle position of the top of the cooling cavity.

4. The hanging type double-chamber kiln without corbels and preventing stone accumulation according to claim 3 is characterized in that: The cooling cavity includes a cooling main cavity and an annular channel, wherein the annular channel is arranged at the top of the cooling main cavity, and the hanging cavity is sunken in the middle of the annular channel; A plurality of ash cleaning holes are provided on the annular channel, and a closing cover is provided on the top of the ash cleaning holes.

5. The hanging type double-chamber kiln without corbels and preventing stone accumulation according to claim 4 is characterized in that: The inner walls of the calcining chamber and the preheating chamber are both paved with refractory linings. The calcining chamber is fixedly seated on the top of the hanging chamber. The preheating chamber is fixedly seated on the top of the calcining chamber. The top of the preheating chamber is provided with a furnace top.

6. The hanging type double-chamber kiln without corbels and preventing stone accumulation according to claim 4 is characterized in that: A stone-preventing partition wall is built on the top of the junction between the cavity wall of the symmetrically arranged cooling cavity and the cavity wall of another cooling cavity, and a connecting channel is left above the stone-preventing partition wall; A cooling air duct is provided at the bottom of the main cooling cavity. After the cooling air duct is connected to the inside of the main cooling cavity, a double-layer air hood is provided at the end thereof. The double-layer air hood is provided in the middle position of the bottom of the main cooling cavity.

7. The hanging type double-chamber kiln without corbels and preventing stone accumulation according to claim 2, characterized in that: The tubular suspension columns are high-strength hollow tubes. Twelve tubular suspension columns are provided, of which six are air inlet ducts and six are air outlet ducts. The air inlet ducts and the air outlet ducts are arranged alternately. The bottoms of the tubular suspension columns are connected to the annular circulation pipeline through three-way joints.

8. The hanging type double-chamber kiln without corbels and preventing stone accumulation according to claim 7, characterized in that: A plurality of anchoring pieces are distributed on the outside of the tubular suspender and the annular circulation pipe; The front ends of the anchoring pieces are dispersedly arranged in a tree-branch shape, and the anchoring pieces on the tubular suspension column are arranged in staggered positions along the up and down directions.

9. The hanging type double-chamber kiln without corbels and preventing stone accumulation according to claim 5, characterized in that: The main cooling chamber is built with wear-resistant high-quality refractory bricks; the refractory lining on the inner wall of the calcining chamber is composite brown corundum refractory bricks, and the refractory lining on the inner wall of the preheating chamber is high-strength scour-resistant refractory bricks. The annular hanging beam is cast by baking-free high-strength scour-resistant castable.

10. A construction method for a hanging type double-chamber kiln without corbels and anti-stone accumulation, comprising the hanging type double-chamber kiln without corbels and anti-stone accumulation according to any one of claims 1 to 9, characterized in that: The construction method steps include: Step 1: Foundation pouring: Use castables to pour the foundation platform, with a surface flatness error of ≤2mm / m, and pre-buried cooling duct interfaces; Step 2: Cooling main cavity masonry; the inner wall is built with high-strength erosion-resistant refractory bricks, filled with refractory mortar, and the masonry density is ≥98%; A double-layer hood is preset at the bottom, and the double-layer hood and the cooling air duct are welded and then tested for air tightness; Step three: Build an annular channel; build an annular channel on the top of the cooling main chamber, reserve a ash cleaning hole on the annular channel, and install a closed cover at the ash cleaning hole; Step 4: Pre-embed and position the hanging columns; pre-embed 12 high-strength hollow tubular hanging columns along the inner circumference of the annular channel at the top of the cooling chamber, with a verticality error of ≤1°; Among the 12 tubular hanging columns, 6 are air inlet pipes and 6 are air outlet pipes, which are arranged in a staggered manner. The top ends are welded and fixed to the embedded steel plates, and reinforced with high-temperature resistant castables for a second time. Step 5: Cast the loop circulation pipe and the hanging beam; connect the bottom end of the tubular hanging column to the loop circulation pipe through a tee joint, weld the joint, and weld the tree-branch anchor on the surface of the loop circulation pipe. After full welding, perform an airtightness test on the tubular hanging column and the loop circulation pipe; Formwork is provided at the annular circulation pipeline, and the annular hanging beam is cast using high-strength, erosion-resistant castables that do not require baking. After casting, natural curing is carried out. The surface of the tubular suspender is welded with branch-shaped anchors to enhance the bonding strength with the castable; Step 6: Cavity masonry: Use mortise and tenon I-shaped bricks for spiral masonry, stagger each layer by 1 / 2 brick length, and leave 5mm expansion joints between bricks; After every 1m of masonry, high temperature resistant castables are injected into the gaps between the tubular columns for curing, with the curing time being >24 hours; Step seven: calcining chamber and preheating chamber masonry; build calcining chamber and preheating chamber, lay composite brown corundum bricks on the inner wall of calcining chamber, spray anti-oxidation coating; preheating chamber adopts gradient masonry, and build furnace roof on the top of preheating chamber; Step 8: Construction of anti-rock partition wall: Build an inclined anti-rock partition wall at the junction of the cooling cavity, and reserve a connecting channel at the top; Step 9: System debugging: Connect the air inlet ducts in the 12 tubular suspenders to the variable frequency blower; and connect the air outlet ducts to the combustion-supporting system; The system air pressure is controlled at 2-3kPa to test the uniformity of air flow distribution; Full load static load test; load ≥ 1.2 times the design value, lasting 2 hours, deformation ≤ 2mm / m; Hot performance verification: gradually increase the temperature of the preheating chamber to 800°C at a rate of 200°C / h, then increase the temperature of the calcining chamber to 1200°C at a rate of 300°C / h, and maintain a constant temperature for 24 hours.

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