Integrated chemical rotary kiln device

Abstract

The utility model relates to the technical field of chemical engineering, in particular to an integrated chemical rotary kiln device. The integrated chemical rotary kiln device comprises a chemical rotary kiln, an outer heating chamber and a heating assembly, the chemical rotary kiln comprises a fixed outer cylinder, a rotary inner cylinder, a spiral plate and a driving motor, the rotary inner cylinder is arranged on the fixed outer cylinder in a penetrating mode, and the spiral plate is installed on the outer wall of the rotary inner cylinder and located in the fixed outer cylinder; the driving motor is in driving connection with the rotary inner cylinder, the fixed outer cylinder is sleeved with the outer heating chamber, the input end and the output end of the outer heating chamber and the input end and the output end of the rotary inner cylinder both communicate with the heating assembly, and the heating assembly is used for outputting high-temperature flue gas to heat the outer heating chamber and the rotary inner cylinder and recycling the heated low-temperature flue gas. The integrated chemical rotary kiln device is simple in structure, the size of the chemical rotary kiln is reduced under the same thermal load, the internal and external indirect heating mode is adopted, and the heat transfer efficiency is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical industry, in particular to an integrated chemical rotary kiln device. Background Art

[0002] A chemical rotary kiln is a rotating cylinder device with an inclination. Solid materials are filled inside the cylinder and slowly move from high to low toward the outlet as the rotary kiln rotates. The main function of a chemical rotary kiln is to provide a uniform rotation speed for the solid materials, and at the same time, under internal or external heating conditions, the materials are evenly mixed and heated. According to the heating method, chemical rotary kilns are generally divided into direct internal heating type and indirect external heating type. Generally, direct internal heating rotary kilns mainly pass the high-temperature flue gas generated by the hot blast furnace into the kiln or use the high-temperature flue gas generated by the built-in burner to directly heat the solid materials, while indirect external heating rotary kilns mainly pass the high-temperature flue gas generated by the hot blast furnace to the outside of the cylinder wall or indirectly heat the solid materials in the rotary kiln through the cylinder wall through electric heating. In traditional chemical rotary kilns, solid materials are fed into the kiln through a high inlet. Within the kiln, they slowly move downward along the axis of the kiln as the kiln rotates, ultimately being discharged through a low-lying outlet. Therefore, a bucket elevator is required to lift the solid materials to a certain height before conveying them to the inlet via a belt conveyor. Furthermore, scrapers are required to remove accumulated solid particles from the kiln walls, and skimmers are also required to mix and enhance heat transfer. Because the kiln's drum is constantly rotating, complex support devices, as well as sealing devices at the kiln head and tail, are required.

[0003] Chinese utility model patent publication number CN220871415U discloses an indirectly heated rotary kiln device, which includes a combustion chamber, a rotary kiln provided on the inside of the combustion chamber, a support plate fixedly connected to the outside of the combustion chamber, a motor provided at the bottom of the support plate, a main wheel fixedly connected to the outside of the motor, a secondary wheel engaged with the outside of the main wheel, a screw fixedly connected to the outside of the secondary wheel, a slider threadedly connected to the outside of the screw, a bracket fixedly connected to the top of the slider, a heat insulation board fixedly connected to the top of the bracket, a plurality of burners provided on the top of the heat insulation board, an air delivery pipe and a gas delivery pipe respectively provided on the outside of the burners, an air fan provided on the outside of the air delivery pipe, a gas fan provided on the outside of the gas delivery pipe, and a support provided on the outside of the gas fan. The above-mentioned indirect heating rotary kiln device can achieve the effect of indirectly heating the rotary kiln and is also convenient for maintenance of the burner. The air conveying pipe, gas conveying pipe and several burners used therein have large heating losses. At the same time, the rotary kiln device does not have the ability to heat internally, and the heating effect is poor when the material accumulates on the inner wall of the rotary kiln device. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide an integrated chemical rotary kiln device, which has a simple structure, reduces the size of the chemical rotary kiln under the same heat load, adopts an internal and external indirect heating method, and has a higher heat transfer efficiency.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] An integrated chemical rotary kiln device includes a chemical rotary kiln, an external heating chamber and a heating assembly. The chemical rotary kiln includes a fixed outer cylinder, a rotating inner cylinder, a spiral plate and a drive motor. The rotating inner cylinder is inserted into the fixed outer cylinder, the spiral plate is installed on the outer wall of the rotating inner cylinder and is located inside the fixed outer cylinder, the drive motor is connected to the rotating inner cylinder for driving, the external heating chamber is sleeved on the fixed outer cylinder, the input and output ends of the external heating chamber and the rotating inner cylinder are both connected to the heating assembly, and the heating assembly is used to output high-temperature flue gas to heat the external heating chamber and the rotating inner cylinder, and recover the heated low-temperature flue gas.

[0007] Furthermore, the heating assembly includes a hot blast furnace, a high-temperature flue gas pipe, a low-temperature flue gas pipe, an air preheater, a blower, an induced draft fan and a chimney. The output end of the hot blast furnace is connected to the input end of the high-temperature flue gas pipe, the output end of the high-temperature flue gas pipe is connected to the input end of the external heating chamber and the rotating inner drum, the output end of the external heating chamber and the rotating inner drum is connected to the input end of the low-temperature flue gas pipe, the output end of the low-temperature flue gas pipe is connected to the input end of the air preheater, the output end of the air preheater is connected to the input end of the induced draft fan, the output end of the induced draft fan is connected to the chimney, the output end of the blower is connected to the input end of the hot blast furnace, and the air preheater is used to exchange heat with the air blown out by the blower.

[0008] Furthermore, a twisted spiral sheet is installed on the inner wall of the rotating inner cylinder.

[0009] Furthermore, the spiral plate includes a first spiral plate and a second spiral plate, the pitch of the first spiral plate is greater than the pitch of the second spiral plate, the second spiral plate is located between the first spiral plates, and the second spiral plate is arranged corresponding to the external heating chamber.

[0010] Furthermore, a fixed support is installed at the bottom of the fixed outer cylinder.

[0011] Furthermore, the chemical rotary kiln further comprises a feed port, a discharge port and an exhaust port, and the feed port, the discharge port and the exhaust port are all arranged on the fixed outer cylinder.

[0012] Furthermore, the height of the discharge end of the chemical rotary kiln is higher than the height of the feed end.

[0013] Furthermore, an exhaust pipe is provided at the exhaust port.

[0014] Furthermore, a bag dust collector is connected to the end of the exhaust pipe.

[0015] Furthermore, the end of the bag filter is connected to a tail flow recovery device.

[0016] Beneficial effects of the present utility model: The present utility model discloses an integrated chemical rotary kiln device, comprising a chemical rotary kiln, an external heating chamber and a heating assembly, the chemical rotary kiln comprising a fixed outer cylinder, a rotating inner cylinder, a spiral plate and a driving motor, the rotating inner cylinder is penetrated by the fixed outer cylinder, the spiral plate is mounted on the outer wall of the rotating inner cylinder and is located inside the fixed outer cylinder, the driving motor is drivingly connected to the rotating inner cylinder, the external heating chamber is sleeved on the fixed outer cylinder, the input and output ends of the external heating chamber and the rotating inner cylinder are both connected to the heating assembly, the heating assembly is used to output high-temperature flue gas to heat the external heating chamber and the rotating inner cylinder, and to recover the heated low-temperature flue gas. The chemical rotary kiln is used to mix, heat and react materials. The external heating chamber and heating assembly are both used to provide heating support for the chemical rotary kiln. The fixed outer cylinder is stationary, which reduces the complex support devices, kiln head and kiln tail sealing devices, etc., and improves the stability and sealing of the equipment. The drive motor is used to drive the rotating inner cylinder and spiral plates to rotate. During the rotation process, the rotating inner cylinder and spiral plates complete the mixing, heating and reaction of the materials until the finished materials are discharged. The rotating inner cylinder is connected to the heating assembly and cooperates with the external heating chamber to realize internal and external indirect heating of the chemical rotary kiln, thereby improving the production capacity of the equipment. The integrated chemical rotary kiln device of the present application has a simple structure. Under the same heat load, the size of the chemical rotary kiln is reduced. The heat transfer efficiency is higher by adopting the internal and external indirect heating method. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of the utility model;

[0018] Figure 2 This is a schematic structural diagram of a chemical rotary kiln according to the present invention;

[0019] Figure 3 It is a structural schematic diagram of the twisted spiral piece of the utility model.

[0020] Explanation of the reference numerals: external heating chamber 1, fixed outer cylinder 2, rotating inner cylinder 3, spiral plate 4, first spiral plate 41, second spiral plate 42, drive motor 5, hot air furnace 6, high-temperature flue gas pipe 7, low-temperature flue gas pipe 8, air preheater 9, blower 10, induced draft fan 11, chimney 12, twisted spiral plate 13, fixed support 14, feed port 15, discharge port 16, exhaust port 17, exhaust pipe 18, bag filter 19, tail flow recovery equipment 20. DETAILED DESCRIPTION

[0021] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0022] It should be understood that the terms used herein are for the purpose of describing specific example embodiments only and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "comprise", "include", "contain" and "have" are inclusive and therefore specify the presence of the stated features, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, steps, operations, elements, parts and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring them to be performed in the specific order described or illustrated, unless the order of execution is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0023] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates otherwise, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teachings of the example embodiments.

[0024] For ease of description, spatially relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figures, such as "inside", "outside", "inside", "outside", "below", "beneath", "above", "above", etc. Such spatially relative terms are meant to include different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is flipped, then an element described as "below other elements or features" or "below other elements or features" will then be oriented as "above other elements or features" or "above other elements or features". Thus, the example term "below..." can include both above and below orientations. The device can be oriented otherwise (rotated 90 degrees or in other orientations) and the spatially relative descriptors used herein are interpreted accordingly.

[0025] Example 1:

[0026] like Figure 1-Figure 3 As shown, the present embodiment provides an integrated chemical rotary kiln device, which includes a chemical rotary kiln, an external heating chamber 1 and a heating component. The chemical rotary kiln includes a fixed outer cylinder 2, a rotating inner cylinder 3, a spiral plate 4 and a drive motor 5. The rotating inner cylinder 3 is penetrated by the fixed outer cylinder 2, and the spiral plate 4 is installed on the outer wall of the rotating inner cylinder 3 and is located inside the fixed outer cylinder 2. The drive motor 5 is driven and connected to the rotating inner cylinder 3. The external heating chamber 1 is sleeved on the fixed outer cylinder 2. The input and output ends of the external heating chamber 1 and the rotating inner cylinder 3 are both connected to the heating component. The heating component is used to output high-temperature flue gas to heat the external heating chamber 1 and the rotating inner cylinder 3, and recover the heated low-temperature flue gas. In actual use, the chemical rotary kiln is used to mix, heat and react materials. The external heating chamber 1 and the heating assembly are both used to provide heating support for the chemical rotary kiln. The fixed outer cylinder 2 is stationary, which reduces the complex support devices, kiln head and kiln tail sealing devices, etc., and improves the stability and sealing of the equipment. By sleeved on the fixed outer cylinder 2, the external heating chamber 1 is easier to achieve sealing and reduce heat loss. The drive motor 5 is used to drive the rotating inner cylinder 3 and the spiral plate 4 to rotate. During the rotation process, the rotating inner cylinder 3 and the spiral plate 4 complete the mixing, heating and reaction of the materials until the finished materials are discharged. The rotating inner cylinder 3 is connected to the heating assembly and cooperates with the external heating chamber 1 to realize internal and external indirect heating of the chemical rotary kiln. By controlling the gap between the spiral plate 4 and the fixed outer cylinder 2, the spiral plate 4 can drive the material to move while also clearing the material accumulated on the inner wall of the fixed outer cylinder 2, ensuring the heat transfer efficiency between the external heating chamber 1 and the material. The rotating spiral plate 4 can also play the role of a traditional rotary kiln scraper, strengthening the heat exchange between the external heating chamber 1 and the material and improving the production capacity of the equipment.

[0027] In this embodiment, the heating component includes a hot blast furnace 6, a high-temperature flue gas pipe 7, a low-temperature flue gas pipe 8, an air preheater 9, a blower 10, an induced draft fan 11 and a chimney 12. The output end of the hot blast furnace 6 is connected to the input end of the high-temperature flue gas pipe 7, the output end of the high-temperature flue gas pipe 7 is connected to the input end of the external heating chamber 1 and the rotating inner cylinder 3, the output end of the external heating chamber 1 and the rotating inner cylinder 3 is connected to the input end of the low-temperature flue gas pipe 8, the output end of the low-temperature flue gas pipe 8 is connected to the input end of the air preheater 9, the output end of the air preheater 9 is connected to the input end of the induced draft fan 11, the output end of the induced draft fan 11 is connected to the chimney 12, the output end of the blower 10 is connected to the input end of the hot blast furnace 6, and the air preheater 9 is used to exchange heat with the air blown out by the blower 10. In actual use, the high-temperature flue gas required for heating materials in the chemical rotary kiln is generated by the hot blast furnace 6, and is passed into the rotating inner cylinder 3 and the external heating chamber 1 through the high-temperature flue gas pipe 7, thereby realizing indirect heating of the inside and outside of the chemical rotary kiln. The low-temperature flue gas produced after heat exchange is then passed into the air preheater 9 through the low-temperature flue gas pipe 8 to exchange heat with the air of the blower 10, thereby preheating the combustion air entering the hot blast furnace 6 and improving the thermal efficiency of the hot blast furnace 6. After the low-temperature flue gas after heat exchange in the air preheater 9 meets environmental protection requirements, it is sent into the chimney 12 by the induced draft fan 11 for discharge.

[0028] In this embodiment, twisted spiral blades 13 are installed on the inner wall of the rotating inner drum 3. In actual use, the twisted spiral blades 13 are inserted into the hollow portion of the rotating inner drum 3, and work together with the rotating inner drum 3 to provide indirect internal heating support for the chemical rotary kiln. When the high-temperature flue gas enters the rotating inner drum 3, it exchanges heat with the material, solving the problem of low heat load per unit volume in traditional indirect external heating rotary kilns. The twisted spiral blades 13 also enhance the heat transfer efficiency between the high-temperature flue gas, the rotating inner drum 3, and the material, thereby reducing the size of the chemical rotary kiln under the same heat load.

[0029] In this embodiment, the spiral plate 4 includes a first spiral plate 41 and a second spiral plate 42. The pitch of the first spiral plate 41 is greater than the pitch of the second spiral plate 42. The second spiral plate 42 is located between the first spiral plates 41. The second spiral plate 42 is arranged corresponding to the external heating chamber 1. In actual use, the chemical rotary kiln is divided into a low-temperature mixing zone, a high-temperature reaction zone, and a low-temperature cooling zone by the first spiral plate 41 and the second spiral plate 42. The low-temperature mixing zone is located near the inlet end of the chemical rotary kiln, the high-temperature reaction zone is located where the chemical rotary kiln is mounted on the external heating chamber 1, and the low-temperature cooling zone is located near the discharge end of the chemical rotary kiln. When the material enters the chemical rotary kiln, it is mixed in the low-temperature mixing zone and then reacts in the high-temperature reaction zone. The second spiral plate 42 increases the residence time of the material, increases the material temperature, provides the required energy for the material reaction, and ensures that the material can fully react for a sufficient time. The material then enters the low-temperature cooling zone for cooling and discharge.

[0030] Example 2:

[0031] like Figure 1 and Figure 2 As shown, based on the first embodiment, a fixing support 14 is installed at the bottom of the fixed outer cylinder 2. In actual use, the fixing support 14 facilitates the stable placement of the fixed outer cylinder 2.

[0032] In this embodiment, the chemical rotary kiln further includes a feed port 15, a discharge port 16, and an exhaust port 17, all of which are disposed on the fixed outer cylinder 2. In actual use, materials enter the chemical rotary kiln through the feed port 15 for heating, mixing, and reaction. The reacted materials are discharged through the discharge port 16, and gases generated during the material reaction are discharged through the exhaust port 17.

[0033] In this embodiment, the discharge end of the chemical rotary kiln is higher than the feed end. In actual use, the spiral plates 4 push material at the feed end of the chemical rotary kiln to the discharge end and discharge it. By leveraging the horizontal thrust and vertical lifting action of the spiral plates 4, the material is propelled in an upward horizontal direction, resolving the problem of conventional rotary kilns where material can only move horizontally or downwardly, and eliminating the need for bucket elevators.

[0034] In this embodiment, an exhaust pipe 18 is provided at the exhaust port 17. In actual use, the gas generated during the material reaction is discharged from the chemical rotary kiln through the exhaust pipe 18.

[0035] In this embodiment, a bag dust collector 19 is connected to the end of the exhaust pipe 18. In actual use, the bag dust collector 19 removes mixed materials from the gas generated during the material reaction process.

[0036] In this embodiment, the end of the bag filter 19 is connected to a tail flow recovery device 20. In actual use, the tail flow recovery device 20 is used to recover the tail flow of the gas generated during the material reaction process to reduce its pollution to the air.

[0037] All technical features in this embodiment can be freely combined according to actual needs. The above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions of the present invention, and all of these should be included in the scope of the claims of the present invention. The technologies, shapes, and structural parts not described in detail in this utility model are all well-known technologies.

[0038] The above embodiments are preferred implementation schemes of the present invention. In addition, other implementation schemes are also included. Any obvious replacement without departing from the concept of the present technical solution is within the protection scope of the present invention.

Claims

1. An integrated chemical rotary kiln device, characterized by: The invention comprises a chemical rotary kiln, an external heating chamber (1) and a heating assembly. The chemical rotary kiln comprises a fixed outer cylinder (2), a rotating inner cylinder (3), a spiral plate (4) and a driving motor (5). The rotating inner cylinder (3) is inserted into the fixed outer cylinder (2). The spiral plate (4) is installed on the outer wall of the rotating inner cylinder (3) and is located inside the fixed outer cylinder (2). The driving motor (5) and the rotating inner cylinder (3) are connected in a driving manner. The external heating chamber (1) is sleeved on the fixed outer cylinder (2). The input and output ends of the external heating chamber (1) and the rotating inner cylinder (3) are both connected to the heating assembly. The heating assembly is used to output high-temperature flue gas to heat the external heating chamber (1) and the rotating inner cylinder (3), and to recover the heated low-temperature flue gas.

2. The integrated chemical rotary kiln device according to claim 1, characterized in that: The heating component comprises a hot blast furnace (6), a high-temperature flue gas pipe (7), a low-temperature flue gas pipe (8), an air preheater (9), a blower (10), an induced draft fan (11) and a chimney (12); the output end of the hot blast furnace (6) is connected to the input end of the high-temperature flue gas pipe (7); the output end of the high-temperature flue gas pipe (7) is connected to the input end of the external heating chamber (1) and the rotating inner cylinder (3); the output end of the external heating chamber (1) and the rotating inner cylinder (3) is connected to the input end of the low-temperature flue gas pipe (8); the output end of the low-temperature flue gas pipe (8) is connected to the input end of the air preheater (9); the output end of the air preheater (9) is connected to the input end of the induced draft fan (11); the output end of the induced draft fan (11) is connected to the chimney (12); the output end of the blower (10) is connected to the input end of the hot blast furnace (6); and the air preheater (9) is used to perform heat exchange on the air blown out by the blower (10).

3. The integrated chemical rotary kiln device according to claim 1, characterized in that: The inner wall of the rotating inner cylinder (3) is provided with a twisted spiral piece (13).

4. The integrated chemical rotary kiln device according to claim 1, characterized in that: The spiral plate (4) comprises a first spiral plate (41) and a second spiral plate (42), the pitch of the first spiral plate (41) being greater than the pitch of the second spiral plate (42), the second spiral plate (42) being located between the first spiral plates (41), and the second spiral plate (42) being arranged corresponding to the external heating chamber (1).

5. The integrated chemical rotary kiln device according to claim 1, characterized in that: A fixed support (14) is installed at the bottom of the fixed outer cylinder (2).

6. The integrated chemical rotary kiln device according to claim 1, characterized in that: The chemical rotary kiln further comprises a feed port (15), a discharge port (16) and an exhaust port (17), and the feed port (15), the discharge port (16) and the exhaust port (17) are all arranged on the fixed outer cylinder (2).

7. The integrated chemical rotary kiln device according to claim 6, characterized in that: The height of the discharge end of the chemical rotary kiln is higher than that of the feed end.

8. The integrated chemical rotary kiln device according to claim 6, characterized in that: An exhaust pipe (18) is provided at the exhaust port (17).

9. The integrated chemical rotary kiln device according to claim 8, characterized in that: The end of the exhaust pipe (18) is connected to a bag dust collector (19).

10. The integrated chemical rotary kiln device according to claim 9, characterized in that: The end of the bag filter (19) is connected to a tail flow recovery device (20).

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