Lightweight aggregate calcining device

Abstract

The utility model provides a lightweight aggregate calcining device. The lightweight aggregate calcining device comprises a segmented heating furnace body, a waste heat circulating module, a spiral conveyor and a cooling module, the segmented heating furnace body is divided into a preheating section, a main calcining section and a slow cooling section which are connected in sequence through a heat insulation assembly. The preheating section is provided with an electric heating part, the main calcining section is provided with a combustor, and the slow cooling section is provided with a cooling part. The upper portion of the kiln head is communicated with an outlet of the raw material pretreatment device, and a ventilation opening is formed in the lower portion of the kiln head. The kiln tail is connected with an inlet of the screw conveyor, and the screw conveyor is used for conveying the calcined lightweight aggregate to the cooling module for cooling and shaping. The waste heat circulation module comprises a first circulation pipeline arranged between the two heat insulation assemblies and a second circulation pipeline arranged between the slow cooling section and the ventilation opening. According to the utility model, multi-section gradient heating is adopted, so that local over-burning or under-burning is avoided. Heat insulation of all the sections is achieved, high-precision temperature control is achieved, and the stability of the partition temperature and the uniformity of gradient distribution are ensured.

Description

Technical Field

[0001] This utility model relates to the field of building material production equipment technology, and in particular to a lightweight aggregate calcination device. Background Technology

[0002] The production of lightweight aggregate is a meticulous and systematic process, the core of which lies in the strict control of every step from raw material selection to finished product output. First, high-quality raw materials such as gypsum and silicates need to be selected. Next, the raw materials are crushed and mixed to ensure thorough integration of the various materials, preparing them for subsequent heating and expansion. During the calcination heating stage, the raw materials expand at a high temperature of approximately 1000℃, forming lightweight aggregate with high strength. After cooling, the properties of the lightweight aggregate are further stabilized. Finally, it is screened to remove impurities and substandard products.

[0003] Firing is a crucial step in the manufacture of lightweight aggregates. During firing, factors such as temperature, time, and type of fuel significantly impact product quality. Excessively high initial firing temperatures can lead to surface dehydration and even explosions in the aggregates; conversely, excessively low temperatures during firing can result in the aggregates failing to reach a molten state, containing impurities such as iron oxide and quartz, thus affecting quality.

[0004] Traditional lightweight aggregate calcination equipment often employs single-temperature-range heating, resulting in high energy consumption and uneven product density and strength. Existing technologies include segmented temperature control, allowing for individual temperature adjustments at different calcination stages. However, these solutions lack consideration for multi-stage gradient heating tailored to the characteristics of lightweight aggregates. Furthermore, most calcination equipment utilizes continuous rotary kilns, leading to excessive heat loss and temperature variations between adjacent stages when multi-stage gradient heating is implemented, resulting in low thermal efficiency and unstable product performance. Utility Model Content

[0005] In view of this, the present invention aims to propose a lightweight aggregate calcination device that can set the target temperature of each stage according to the composition of the lightweight aggregate, and use multi-stage gradient heating to avoid local over-burning or under-burning, thereby realizing the automated production of lightweight aggregate calcination and ensuring stable product performance.

[0006] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0007] A lightweight aggregate calcination device includes a segmented heating furnace body, a waste heat circulation module, a screw conveyor, and a cooling module;

[0008] The segmented heating furnace body is divided into a preheating section, a main calcination section, and a slow cooling section connected in sequence by heat insulation components.

[0009] The preheating section is equipped with an electric heating element, the main calcination section is equipped with a burner, and the slow cooling section is equipped with a cooling element.

[0010] The segmented heating furnace body is provided with a kiln head and a kiln tail at both ends;

[0011] The upper part of the kiln head is connected to the outlet of the raw material pretreatment device, and the lower part of the kiln head is provided with a ventilation opening;

[0012] The kiln tail is connected to the inlet of the screw conveyor, which is used to transport the calcined lightweight aggregate to the cooling module for cooling and shaping.

[0013] The waste heat circulation module includes a first circulation pipe located between the two heat insulation components, and a second circulation pipe located between the slow cooling section and the vent.

[0014] Furthermore, the heat insulation assembly includes a first material guiding section, a temperature adjusting section, and a second material guiding section connected in sequence;

[0015] The first material guiding section has a first channel that communicates with the preheating section.

[0016] The second material guide section is provided with a second channel communicating with the slow cooling section;

[0017] The temperature adjustment unit is provided with a heat-conducting area connected to the waste heat circulation module, and a feeding area for the flow of the lightweight aggregate.

[0018] Furthermore, the first guide part and the second guide part are fastened together;

[0019] Both the first and second material guiding parts are formed with cavities, and the two cavities form a temperature adjustment space.

[0020] The temperature adjustment unit is located within the temperature adjustment space.

[0021] Furthermore, the temperature adjustment unit includes a partition plate arranged radially within the adjustment space and a partition plate arranged vertically.

[0022] The upper and lower ends of the partition plate abut against the first and second guide sections, respectively.

[0023] The partition plate divides the adjustment space into a temperature adjustment chamber and a material guiding chamber;

[0024] The temperature adjustment chamber is provided with a vent hole that is connected to the first circulation pipeline.

[0025] Furthermore, the first material guiding part includes a bottom plate and a first surrounding plate disposed on the outside of the bottom plate;

[0026] The first surrounding plate and the bottom plate together form the cavity;

[0027] The first channel includes a plurality of circular holes disposed on the base plate;

[0028] An annular plate is also provided between the partition plate and the bottom plate, and the annular plate covers the outside of the circular hole;

[0029] An annular material distribution area is formed between the annular plate and the partition plate; a material guiding channel is provided between the annular plate and the temperature adjustment chamber.

[0030] Furthermore, the material guiding channel is formed by having a through flow groove along the height direction of the annular plate;

[0031] A guide plate is connected to one side of the flow channel;

[0032] The guide plate extends radially from the annular plate to the partition plate, and there is a flow gap between the guide plate and the partition plate.

[0033] Furthermore, the second material guide includes a top plate and a second surrounding plate disposed on the outside of the top plate;

[0034] The second enclosure and the top plate together form the cavity;

[0035] The second channel includes at least one arc-shaped groove disposed on the top plate, the arc-shaped groove being in communication with the bulk material area.

[0036] Furthermore, the outer sides of the first enclosure and the second enclosure are provided with flanges, and the two flanges are connected in abutment.

[0037] The flange is provided with a mounting part, and the first material guide part and the second material guide part are fixed by the mounting part.

[0038] Furthermore, an annular sealing ring for sealing is provided between the two flanges.

[0039] Furthermore, the cooling module includes a rotating assembly connected to the outlet of the screw conveyor, and a screening box surrounding the rotating assembly;

[0040] The screening box has a cooling chamber inside, and a support plate is provided inside the cooling chamber. The rotating assembly includes two pivot rollers pivotally connected to the screening box, a drive unit for driving the pivot rollers to rotate, and a rotating frame sleeved on the outside of the pivot rollers.

[0041] The cooling chamber is located on the upper part of the support plate, and the material receiving chamber is located below the support plate; the material receiving chamber is connected to the material outlet; the upper part of the screening box is provided with a waste gas collection port.

[0042] Compared with the prior art, this utility model has the following advantages:

[0043] The lightweight aggregate calcination device described in this invention uses a rotary kiln configured as a segmented heating furnace, allowing the raw materials to undergo multi-stage gradient heating through a preheating section, a main calcination section, and a slow cooling section. This avoids localized over- or under-calcination, resulting in lightweight aggregates with the required density and compressive strength. Furthermore, the use of heat insulation components between each section prevents temperature interference at the junctions of adjacent sections, which is common in conventional production using a continuous furnace cavity. This enables high-precision temperature control, ensuring temperature stability and uniform gradient distribution. In addition, the use of a burner in the central main calcination section reduces heating costs while maintaining the desired heating temperature. Electric heating is used in the preheating and slow cooling sections, where temperature requirements are lower. The ratio of the two heating methods can be flexibly adjusted according to production needs. This hybrid heating method fully utilizes the precise control of electric heating and the cost advantages of burner heating, achieving efficient and energy-saving production goals.

[0044] In addition, this invention also includes a first circulation pipeline between the two heat insulation components to circulate the airflow temperature at both ends of the main calcination section, ensuring the combustion effect of the entire main calcination section. By setting a second circulation pipeline between the vent and the slow cooling section, the hot air passing through the main calcination section is transported to the vent, heating the raw materials during the feeding process, effectively reducing overall energy consumption. At the same time, the waste heat of the slow cooling section is used to generate steam, realizing the cascade utilization of energy. Attached Figure Description

[0045] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0046] Figure 1 This is a flowchart illustrating the layout of the lightweight aggregate calcination device according to an embodiment of the present invention.

[0047] Figure 2 This is a cross-sectional schematic diagram of the segmented heating furnace body described in an embodiment of the present utility model;

[0048] Figure 3 This is a first-view perspective perspective view of the heat insulation component described in an embodiment of the present utility model.

[0049] Figure 4 This is a second-view perspective perspective view of the heat insulation component described in an embodiment of the present utility model.

[0050] Figure 5 This is a top view schematic diagram of the heat insulation component described in an embodiment of the present utility model;

[0051] Figure 6 for Figure 5 Schematic diagram of the cross section at point AA;

[0052] Figure 7 This is a front view schematic diagram of the heat insulation component described in an embodiment of the present utility model;

[0053] Figure 8 for Figure 7 Schematic diagram of the cross section at point BB;

[0054] Figure 9 for Figure 7 Schematic diagram of the cross section at the CC point;

[0055] Figure 10 This is a top view of the cooling module described in an embodiment of the present invention.

[0056] Explanation of reference numerals in the attached figures:

[0057] 1. Segmented heating furnace body; 2. Waste heat circulation module; 3. Screw conveyor; 4. Cooling module; 5. Ventilation outlet; 6. Heat insulation components; 7. Pretreatment device;

[0058] 101. Preheating section; 102. Main calcination section; 103. Slow cooling section; 104. Electric heating section; 105. Burner; 106. Kiln head; 107. Kiln tail;

[0059] 201. First circulation pipeline; 202. Second circulation pipeline;

[0060] 401. Rotating assembly; 402. Screening box; 403. Cooling chamber; 404. Support plate; 405. Exhaust gas collection port;

[0061] 601. First material guiding section; 602. Second material guiding section; 603. First channel; 604. Second channel; 605. Guide plate; 606. Divider plate; 607. Partition plate; 608. Temperature adjustment chamber; 609. Material guiding chamber; 610. Annular plate; 611. Feeding area; 612. Bulk material area;

[0062] 4011, Pivoting roller; 4012, Drive unit; 4013, Rotating frame;

[0063] 6011, base plate; 6012, first enclosure plate; 6013, flow channel;

[0064] 6021. Top panel; 6022. Second enclosure panel; 6023. Flanged edge. Detailed Implementation

[0065] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0066] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," and "back," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used 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. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0067] Furthermore, in the description of this utility model, unless otherwise explicitly defined, the terms "installation," "connection," "joining," and "connector" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model in light of the specific circumstances.

[0068] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0069] This embodiment relates to a lightweight aggregate calcination device, which, as a whole, is as follows: Figure 1 As shown, the lightweight aggregate calcination device includes a segmented heating furnace body 1, a waste heat circulation module 2, a screw conveyor 3, and a cooling module 4. The segmented heating furnace body 1 is divided into a preheating section 101, a main calcination section 102, and a slow cooling section 103 connected in sequence by a heat insulation component 6. The preheating section 101 is equipped with an electric heating unit 104, the main calcination section 102 is equipped with a burner 105, and the slow cooling section 103 is equipped with a cooling unit.

[0070] The segmented heating furnace body 1 has a kiln head 106 and a kiln tail 107 at both ends. The upper part of the kiln head 106 is connected to the outlet of the raw material pretreatment device 7, and the lower part of the kiln head 106 is provided with a ventilation port 5. The kiln tail 107 is connected to the inlet of the screw conveyor 3, which is used to transport the calcined lightweight aggregate to the cooling module 4 for cooling and shaping. The waste heat circulation module 2 includes a first circulation pipe 201 located between two heat insulation components 6, and a second circulation pipe 202 located between the slow cooling section 103 and the ventilation port 5.

[0071] As described above, the lightweight aggregate calcination device in this embodiment uses a rotary kiln configured as a segmented heating furnace body 1. This allows the raw material to undergo multi-stage gradient heating through a preheating section 101, a main calcination section 102, and a slow cooling section 103, avoiding localized over- or under-calcination. The resulting lightweight aggregate exhibits the required density and compressive strength. Furthermore, the installation of heat insulation components 6 between each section prevents temperature interference at the junctions of adjacent sections, which is common in existing production processes using a continuous furnace cavity. This achieves high-precision temperature control, ensuring temperature stability and uniform gradient distribution across the sections.

[0072] Furthermore, by using a burner 105 in the main calcination section 102 in the middle, heating costs are reduced while ensuring heating temperature. Electric heating is set in the preheating section 101 and the slow cooling section 103, where the temperature requirements are lower. The ratio of the two heating methods can be flexibly adjusted according to production needs. This hybrid heating method can make full use of the precise control of electric heating and the cost advantages of burner 105 heating to achieve the goal of high efficiency and energy saving.

[0073] In addition, this invention also provides a first circulation pipe 201 between the two heat insulation components 6 to circulate the airflow temperature at both ends of the main calcination section 102, ensuring the combustion effect of the entire main calcination section 102. By providing a second circulation pipe 202 between the vent 5 and the slow cooling section 103, the hot air passing through the main calcination section 102 is transported to the vent 5, heating the raw materials during the feeding process, effectively reducing overall energy consumption. At the same time, the waste heat of the slow cooling section 103 is used to generate steam, realizing the cascade utilization of energy.

[0074] Based on the above overall description, an exemplary structure of the lightweight aggregate calcination device in this embodiment is as follows: Figures 1 to 2 As shown, pretreatment is required before calcination. The raw materials are a mixture of fly ash and sludge, which undergoes crushing, sorting and stacking, pre-wetting, and impurity removal to screen the raw materials for calcination, providing a stable and uniform raw material base for calcination. Figure 1 As shown, the drive and installation structure of the segmented heating furnace body 1 are the same as those in the prior art, and will not be described again here. In addition, the vent 5 in this embodiment can also be connected to an external fan to provide ventilation gas, and the furnace temperature can be controlled by adjusting the ventilation volume to provide oxygen to the burner.

[0075] As a preferred embodiment, such as Figures 3 to 6 As shown, the heat insulation component 6 includes a first material guiding section 601, a temperature adjustment section, and a second material guiding section 602 connected in sequence. The first material guiding section 601 has a first channel 603 that communicates with the preheating section 101. The second material guiding section 602 has a second channel 604 that communicates with the slow cooling section 103. The temperature adjustment section has a heat-conducting area that communicates with the waste heat circulation module 2, and a feeding area 611 for the flow of lightweight aggregates.

[0076] Furthermore, such as Figure 6 As shown, the first material guiding section 601 and the second material guiding section 602 are fastened together. Both the first material guiding section 601 and the second material guiding section 602 have cavities formed on them, which together form a temperature adjustment space. The temperature adjustment part is located in the temperature adjustment space. When the raw material in the preheating section 101 is gradually transferred to the heat insulation component 6, the raw material enters the temperature adjustment space through the first channel 603, and then flows to the main calcining section 102 through the second channel 604. The arrangement of the first material guiding section 601 and the second material guiding section 602 avoids a large-area connection between the preheating section 101 and the main calcining section 102. The raw material can gradually heat up through the temperature adjustment space, reducing energy consumption.

[0077] Furthermore, such as Figures 6 to 9 As shown, the temperature adjustment unit includes a partition plate 606 radially disposed within the adjustment space and a partition plate 607 disposed vertically. The upper and lower ends of the partition plate 607 abut against the first material guide section 601 and the second material guide section 602, respectively, dividing the adjustment space into a temperature adjustment chamber 608 and a material guide chamber 609. The temperature adjustment chamber 608 is provided with a vent hole connected to the first circulation pipe 201.

[0078] By setting up a partition plate 607, the flow of materials is separated from the flow of gas, and the temperature adjustment chamber 608 is located outside the material guiding chamber 609. When the rotary kiln rotates, the material comes into contact with the partition plate 607 due to centrifugal force. At this time, it is convenient to adjust the temperature between the preheating section 101 and the main calcination section 102, as well as between the main calcination section 102 and the slow cooling section 103, thereby effectively ensuring that the temperature of the main calcination section 102 is not leaked out, and improving the product quality of the lightweight aggregate.

[0079] Preferably, such as Figures 3 to 6 As shown, the first material guiding section 601 includes a base plate 6011 and a first surrounding plate 6012 disposed outside the base plate 6011. The first surrounding plate 6012 and the base plate 6011 form a cavity. The first channel 603 includes a plurality of circular holes disposed on the base plate 6011. An annular plate 610 is also provided between the partition plate 606 and the base plate 6011, and the annular plate 610 covers the outside of the circular holes. An annular material distribution area 612 is formed between the annular plate 610 and the partition plate 607, and a material guiding channel is provided between the annular plate 610 and the temperature adjustment cavity 608.

[0080] Furthermore, such as Figures 7 to 8 As shown, the material guiding channel is provided with a through flow groove 6013 along the height direction of the annular plate 610. A guide plate 605 is connected to one side of the flow groove 6013. The guide plate 605 extends radially from the annular plate 610 to the partition plate 607, and there is a flow gap between the guide plate 605 and the partition plate 607.

[0081] In this embodiment, to ensure smooth material flow, such as Figures 1 to 2 As shown, the segmented heating furnace body 1 is set to an inclined mode, and the first channel 603 is set with four round holes. When the material is tilted downward and rotates with the furnace body, part of the material gradually enters the cavity of the first material guide section 601 through the round holes. Due to the centrifugal force, the material flows through the flow groove 6013 and the guide plate 605 set on the annular plate 610 to the partition plate 607, thereby realizing the function of adjusting the temperature while rotating.

[0082] As a preferred embodiment, such as Figures 6 to 9 As shown, the second material guiding section 602 includes a top plate 6021 and a second surrounding plate 6022 disposed outside the top plate 6021. The second surrounding plate 6022 and the top plate 6021 form a cavity. The second channel 604 includes at least one arc-shaped groove disposed on the top plate 6021, and the arc-shaped groove communicates with the material distribution area 612. In this embodiment, two opposing arc-shaped grooves are provided. The material gradually flows from the temperature adjustment chamber 608 into the cavity of the second material guiding section 602, and then flows to the lower section through the arc-shaped grooves.

[0083] In this embodiment, by setting the heat insulation component 6 as described above, the heat of different sections can be prevented from affecting each other. Specifically, the preheating section 101 is heated by resistance wire at a temperature of 200-400°C. By setting the second circulation pipe, the temperature of the slow cooling section 103 is transferred to the vent 5 in the form of steam to form hot air, which acts on the raw material that has just entered the preheating section 101. This can effectively remove free water and bound water from the raw material and reduce the energy consumption of the subsequent high-temperature section.

[0084] In the main calcination section 102, a gas burner 105 is used at a temperature of 800-1200℃ to complete the crystal structure reorganization and porosification of the lightweight aggregate, thereby improving the material's strength and high-temperature resistance. Above 1200℃: the formation of the liquid phase promotes sintering and densification, the porosity of the lightweight aggregate stabilizes at 30%-40%, and the compressive strength is ≥8MPa.

[0085] In the slow cooling section 103, the cooling part is a sleeve covering the outside of the furnace body. Water cooling is introduced into the sleeve to control the cooling rate. When the temperature drops to 600℃, recrystallization is completed and the material volume shrinkage rate is ≤5%.

[0086] In addition, such as Figures 3 to 5 As shown, the outer sides of the first enclosure 6012 and the second enclosure 6022 are provided with flanges 6023, and the two flanges 6023 are connected by abutting each other. A mounting portion is provided on the flange 6023, and the first guide portion 601 and the second guide portion 602 are fixed through the mounting portion. In this embodiment, the mounting portion consists of several through holes evenly distributed around the circumference, and the first guide portion 601 and the second guide portion 602 are fixed by bolts.

[0087] Preferably, an annular sealing ring is provided between the two flanges 6023 for sealing, thereby increasing the sealing effect.

[0088] In addition, such as Figure 1 and Figure 10 As shown, the cooling module 4 includes a rotating assembly 401 connected to the outlet of the screw conveyor 3, and a screening box 402 surrounding the rotating assembly 401. A cooling chamber 403 is formed inside the screening box 402, and a support plate 404 is provided inside the cooling chamber 403. The rotating assembly 401 includes two pivot rollers 4011 pivotally connected to the screening box 402, a drive unit 4012 for driving the pivot rollers 4011 to rotate, and a rotating frame 4013 sleeved on the outside of the pivot rollers 4011. The cooling chamber 403 is located on the upper part of the support plate 404, and a receiving chamber is located below the support plate 404; the receiving chamber communicates with the discharge port; and a waste gas collection port 405 is located on the upper part of the screening box 402.

[0089] In this embodiment, the support plate 404 is a screen. By rotating the rotating component 401, the raw material flowing into the pivot roller 4011 is turned over again, screening out oversized or undersized particles, and retaining particles within the specified size range to ensure stability in subsequent applications.

[0090] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A lightweight aggregate calcination apparatus, characterized in that: It includes a segmented heating furnace body (1), a waste heat circulation module (2), a screw conveyor (3), and a cooling module (4); The segmented heating furnace body (1) is divided into a preheating section (101), a main calcination section (102), and a slow cooling section (103) connected in sequence by a heat insulation component (6). The preheating section (101) is equipped with an electric heating unit, the main calcination section (102) is equipped with a burner (105), and the slow cooling section (103) is equipped with a cooling unit; The segmented heating furnace body (1) is provided with a kiln head (106) and a kiln tail (107) at both ends. The upper part of the kiln head (106) is connected to the outlet of the raw material pretreatment device (7), and the lower part of the kiln head (106) is provided with a ventilation opening (5). The kiln tail (107) is connected to the inlet of the screw conveyor (3), which is used to transport the calcined light aggregate to the cooling module (4) for cooling and shaping. The waste heat circulation module (2) includes a first circulation pipe (201) located between the two heat insulation components (6) and a second circulation pipe (202) located between the slow cooling section (103) and the vent (5).

2. The lightweight aggregate calcination apparatus according to claim 1, characterized in that: The heat insulation component (6) includes a first material guide (601), a temperature adjustment section, and a second material guide (602) connected in sequence. The first material guide section (601) has a first channel (603) that communicates with the preheating section (101). The second material guide section (602) is provided with a second channel (604) that communicates with the slow cooling section (103). The temperature adjustment unit is provided with a heat-conducting area connected to the waste heat circulation module (2) and a feeding area (611) for the flow of the lightweight aggregate.

3. The lightweight aggregate calcination apparatus according to claim 2, characterized in that: The first guide part (601) and the second guide part (602) are fastened together; Both the first material guide section (601) and the second material guide section (602) are formed with cavities, and the two cavities form a temperature adjustment space; The temperature adjustment unit is located within the temperature adjustment space.

4. The lightweight aggregate calcination apparatus according to claim 3, characterized in that: The temperature adjustment unit includes a partition plate (606) arranged radially within the adjustment space, and a partition plate (607) arranged vertically. The upper and lower ends of the partition plate (607) respectively abut against the first guide section (601) and the second guide section (602); The partition plate (607) divides the adjustment space into a temperature adjustment chamber (608) and a material guiding chamber (609). The temperature adjustment chamber (608) is provided with a vent hole connected to the first circulation pipeline (201).

5. The lightweight aggregate calcination apparatus according to claim 4, characterized in that: The first material guide (601) includes a base plate (6011) and a first surrounding plate (6012) disposed on the outside of the base plate (6011). The first surrounding plate (6012) and the bottom plate (6011) form the cavity; The first channel (603) includes a plurality of circular holes disposed on the base plate (6011); An annular plate (610) is also provided between the partition plate (606) and the bottom plate (6011), and the annular plate (610) covers the outside of the circular hole; An annular material distribution area (612) is formed between the annular plate (610) and the partition plate (607). There is a material guiding channel between the annular plate (610) and the temperature adjustment cavity (608).

6. The lightweight aggregate calcination apparatus according to claim 5, characterized in that: The material guiding channel is formed by having a through flow groove (6013) along the height direction of the annular plate (610). A guide plate (605) is connected to one side of the flow channel (6013); The guide plate (605) extends radially from the annular plate (610) to the partition plate (607), and there is a flow gap between the guide plate (605) and the partition plate (607).

7. The lightweight aggregate calcination apparatus according to claim 6, characterized in that: The second material guide (602) includes a top plate (6021) and a second surrounding plate (6022) disposed on the outside of the top plate (6021). The second enclosure plate (6022) and the top plate (6021) together form the cavity; The second channel (604) includes at least one arcuate groove disposed on the top plate (6021), the arcuate groove being in communication with the bulk material area (612).

8. The lightweight aggregate calcination apparatus according to claim 7, characterized in that: The first enclosure (6012) and the second enclosure (6022) are provided with flanges (6023) on their outer sides, and the two flanges (6023) are connected to each other. The flange (6023) is provided with an installation part, and the first guide part (601) and the second guide part (602) are fixed by the installation part.

9. The lightweight aggregate calcination apparatus according to claim 8, characterized in that: An annular sealing ring for sealing is provided between the two flanges (6023).

10. The lightweight aggregate calcination apparatus according to claim 1, characterized in that: The cooling module (4) includes a rotating assembly (401) connected to the outlet of the screw conveyor (3) and a screening box (402) surrounding the rotating assembly (401). The screening box (402) has a cooling cavity (403) inside, and a support plate (404) is provided inside the cooling cavity (403). The rotating assembly (401) includes two pivot rollers (4011) pivotally connected to the screening box (402), a drive unit (4012) for driving the pivot rollers (4011) to rotate, and a rotating frame (4013) sleeved on the outside of the pivot rollers (4011). The cooling chamber (403) is located on the upper part of the support plate (404), and a receiving chamber is provided below the support plate (404); the receiving chamber is connected to the discharge port; and a waste gas collection port (405) is provided on the upper part of the screening box (402).

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