Rotary kiln cylinder heat dissipation recycling device
By designing the kiln cylinder and heat exchange circuit in the rotary kiln cylinder heat dissipation and recycling device of lithium mica clinker, efficient cooling and heat recovery of clinker are achieved, and energy waste and environmental pollution during the cooling process of lithium mica clinker is solved. The problem.
Patent Information
- Application Number
- CN202420153333.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-22
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2034-01-22
AI Technical Summary
A lot of energy waste and environmental pollution caused by lithium mica clinker during the transportation and cooling process.
Design a rotary kiln cylinder heat dissipation and recycling device, including a kiln cylinder and a heat exchange circuit, which absorbs heat and cools through the heat exchange contact between the inner cylinder and the outer cylinder and the water flow of the water replenishment branch to achieve efficient cooling of clinker, and Heat recovery is performed by evaporation to form steam.
It effectively reduces energy waste during the cooling process of lithium mica clinker, reduces environmental pollution, and improves the heat utilization rate of clinker.
Smart Images
Figure CN222438467U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of lithium mica processing, in particular to a rotary kiln cylinder heat dissipation recovery and utilization device. Background Art
[0002] Lepidolite, also known as "lepidolite", often contains rubidium, cesium, etc. It is a monoclinic crystal system and often appears as a fine flaky aggregate. It is lavender, sometimes yellow-green, and has a glassy luster. It is mainly found in pegmatite, but also in greisen and high-temperature hydrothermal veins. It is a mineral raw material for extracting lithium.
[0003] The process of extracting lithium from lepidolite usually requires calcination and carbonization to remove moisture from the lepidolite to form clinker. The clinker needs to be cooled before subsequent use. In this process, a large amount of heat is dissipated into the environment in the form of radiation heat dissipation, which not only causes a large amount of energy waste, but also causes environmental pollution. Utility Model Content
[0004] The main purpose of the present invention is to provide a rotary kiln cylinder heat dissipation recovery and utilization device, aiming to solve the problems of large amount of energy waste and environmental pollution caused by the process of conveying and cooling lepidolite clinker.
[0005] To achieve the above-mentioned purpose, the utility model proposes a rotary kiln cylinder heat dissipation recovery and utilization device, the rotary kiln cylinder heat dissipation recovery and utilization device comprises a kiln cylinder and a heat exchange circuit, the kiln cylinder comprises a support frame, an outer cylinder and an inner cylinder, the outer cylinder is arranged on the support frame, the inner cylinder is rotatably arranged in the outer cylinder, and the outer cylinder is in heat exchange contact with the inner cylinder, a heat exchange cavity is formed in the outer cylinder and an inlet and an outlet connected to the heat exchange cavity are opened; comprising a support frame, an outer cylinder and an inner cylinder, the outer cylinder is arranged on the support frame, the inner cylinder is rotatably arranged in the outer cylinder, and the outer cylinder is in heat exchange contact with the inner cylinder, a heat exchange cavity is formed in the outer cylinder and an inlet and an outlet connected to the heat exchange cavity are opened.
[0006] Optionally, a steam generator is provided on the evaporation branch, and the steam generator includes a gas-liquid separator and an evaporation chamber. The liquid outlet of the gas-liquid separator is connected to the evaporation chamber. The evaporation chamber is correspondingly provided with a heater. The heater heats the liquid water in the evaporation chamber to form steam. The gaseous outlet of the gas-liquid separator converges with the steam formed by evaporation in the evaporation chamber and is discharged.
[0007] Optionally, the heat exchange circuit further includes a water replenishment branch, which is communicated with the heat exchange chamber, and a water replenishment pump, a booster circulation pump and a one-way valve are serially arranged on the water replenishment branch.
[0008] Optionally, the water inlet and the water outlet of the heat exchange chamber are respectively arranged at two ends of the kiln shell.
[0009] Optionally, a heat-conducting medium is filled between the outer cylinder and the inner cylinder.
[0010] Optionally, the outer cylinder includes a first cylinder wall and a second cylinder wall, the heat exchange cavity is formed between the first cylinder wall and the second cylinder wall, and the first cylinder wall and the inner cylinder are filled with a heat exchange medium; the rotary kiln cylinder heat dissipation recovery device also includes a heat pipe, the hot end of the heat pipe extends into the heat exchange medium and fits with the first cylinder wall, and the cold end of the heat pipe extends into the heat exchange cavity.
[0011] Optionally, the heat exchange chamber jacket is provided with a heat insulation layer.
[0012] Optionally, the inner cylinder includes a fixed section and a rotating section, the top of the fixed section has a feed port for a feeding device to extend into; the fixed section is docked with the fixed section, and the inner wall of the rotating section is provided with a spiral stirring blade, and the stirring blade partially extends into the inner cavity of the fixed section to scrape the surface of the inner cavity of the fixed section.
[0013] In the technical solution of the utility model, the inner cylinder is docked with the external equipment to transport the clinker to the cylinder. During the rotation of the inner cylinder, the clinker inside is transported and turned over, so that the clinker is constantly in contact with different positions of the inner cylinder to achieve heat exchange. The water replenishment branch replenishes water into the heat exchange chamber. The water absorbs heat during the flow in the heat exchange chamber, cools and dissipates the heat of the inner cylinder, increases the temperature difference between the inner wall and the clinker, continuously cools the clinker, and improves the cooling effect. In addition, the water part after heat exchange will directly evaporate to form steam, and the steam is discharged through the evaporation mass and put into processing and use, so that the heat of the clinker can be recycled and utilized, reducing heat waste; because the water does not contact the clinker during the heat exchange process, it can reduce environmental pollution. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.
[0015] Figure 1 It is a structural schematic diagram of a heat dissipation recovery device for a rotary kiln cylinder in an embodiment of the utility model;
[0016] Figure 2 This is a detailed structural diagram of the kiln cylinder and the heat exchange circuit in the embodiment of the utility model;
[0017] Figure 3 It is a schematic diagram of the evaporation branch in the embodiment of the utility model.
[0018] Description of Figure Numbers:
[0019] Label name Label name 100 Rotary kiln cylinder heat dissipation recovery device 21 Water supply branch 10 Kiln shell 211 Make-up pump 11 Support frame 212 Booster circulation pump 12 outer cylinder 213 Check valve 121 First tube wall 22 Evaporation branch 122 Second tube wall 221 Gas-Liquid Separator 13 Inner tube 2211 Liquid outlet 131 Fixed segment 2212 Gas outlet 132 Rotation segment 222 Steam generator 133 Mixing blade 2221 Evaporation chamber 141 Heat exchange cavity 2222 Heater 142 Entrance 31 Heat pipe 143 exit 33 Insulation 16 Heat transfer medium 35 Feeding device 20 Heat exchange circuit
[0020] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0022] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
[0023] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0024] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0025] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.
[0026] The utility model provides a rotary kiln cylinder heat dissipation recovery and utilization device, which aims to solve the problems of large amount of energy waste and environmental pollution caused in the process of conveying and cooling lepidolite clinker.
[0027] like Figures 1 to 3 As shown, in one embodiment of the utility model, a rotary kiln cylinder heat dissipation recovery and utilization device 100 includes a kiln cylinder 10 and a heat exchange circuit 20, wherein the kiln cylinder 10 includes a support frame 11, an outer cylinder 12 and an inner cylinder 13, wherein the outer cylinder 12 is arranged on the support frame 11, and the inner cylinder 13 is rotatably arranged in the outer cylinder 12, and the outer cylinder 12 is in heat exchange contact with the inner cylinder 13, a heat exchange cavity 141 is formed in the outer cylinder 12, and an inlet 142 and an outlet communicating with the heat exchange cavity 141 are provided; the kiln cylinder 10 includes a support frame 11, an outer cylinder 12 and an inner cylinder 13, wherein the outer cylinder 12 is arranged on the support frame 11, and the inner cylinder 13 is rotatably arranged in the outer cylinder 12, and the outer cylinder 12 is in heat exchange contact with the inner cylinder 13, a heat exchange cavity 141 is formed in the outer cylinder 12, and an inlet 142 and an outlet communicating with the heat exchange cavity 141 are provided.
[0028] In the present application, the inner cylinder 13 is connected to the external equipment to transport the clinker to the inner cylinder 13. During the rotation of the inner cylinder 13, the clinker inside is transported and turned over, so that the clinker is constantly in contact with different positions of the inner cylinder 13 to achieve heat exchange. The water replenishment branch 21 replenishes water into the heat exchange chamber 141. The water absorbs heat during the flow of the heat exchange chamber 141, cools and dissipates the heat of the inner cylinder 13, increases the temperature difference between the inner cylinder 13 and the clinker, continuously cools the clinker, and improves the cooling effect. In addition, the water part after heat exchange will directly evaporate to form steam, which is discharged through the evaporation branch 22 and put into processing and use, so that the heat of the clinker is recycled and utilized, reducing heat waste; because the water does not contact the clinker during the heat exchange process, it can reduce environmental pollution.
[0029] In one embodiment, a steam generator 222 is provided on the evaporation branch 22. The steam generator 222 includes a gas-liquid separator 221 and an evaporation chamber 2221. The liquid outlet 2211 of the gas-liquid separator 221 is connected to the evaporation chamber 2221. The evaporation chamber 2221 is correspondingly provided with a heater 2222. The heater 2222 heats the liquid water in the evaporation chamber 2221 to form steam. The gas outlet 2212 of the gas-liquid separator 221 and the steam formed by evaporation in the evaporation chamber 2221 are discharged by converging. It can be understood that the water flowing in the heat exchange chamber 141 cannot usually be completely evaporated. In the present application, a gas-liquid separator 221 is provided at the outlet end of the heat exchange chamber 141 to separate steam and hot water. The hot water can be directly used as domestic water or industrial water, or it can flow to the evaporation chamber 2221, and after being heated and evaporated by the heater 2222, it is discharged by converging with the steam of the gas outlet 2212 of the gas-liquid separator 221. Since the water has been heat exchanged once in the heat exchange chamber 141 before entering the evaporation chamber 2221, the temperature can usually reach above 80°C, which can save a lot of energy compared to heating room temperature water to generate steam.
[0030] Based on the above embodiment, the heat exchange circuit 20 further includes a water replenishment branch 21, which is connected to the heat exchange chamber 141. A water replenishment pump 211, a booster circulation pump 212 and a one-way valve 213 are arranged in series on the water replenishment branch 21. The water replenishment pump 211 provides pressure to extract an external water source, the booster circulation pump 212 supplements the leakage pressure to keep the circuit pressure constant, and the one-way valve 213 allows the extracted water to flow only into the heat exchange chamber 141 to prevent hot water from flowing back.
[0031] Furthermore, the water inlet and outlet of the heat exchange chamber 141 are respectively arranged at the two ends of the kiln shell 10. The water outlet of the heat exchange chamber 141 is arranged on the same side as the inlet of the kiln shell, that is, the water flow direction in the heat exchange chamber 141 is opposite to the conveying direction of the lepidolite clinker. The clinker dissipates heat during the conveying process, that is, the temperature at the inlet 142 end is high and the temperature at the outlet end is low. The water in the heat exchange chamber 141 increases in temperature as it flows, and always maintains a sufficient temperature difference between the water in the heat exchange chamber 141 and the lepidolite clinker (internal air).
[0032] In other embodiments, the water inlet and the water outlet of the heat exchange chamber 141 may also be arranged at the same end of the kiln shell 11, and the embodiments of this specification do not limit this.
[0033] In one embodiment, a heat-conducting medium 16 is filled between the outer cylinder 12 and the inner cylinder 13. The inner cylinder 13 is a rotating structure, and the outer cylinder 12 is a fixed structure. By filling the heat-conducting medium 16 between the inner and outer cylinders 12, the friction between the inner and outer cylinders 12 is reduced. At the same time, the heat-conducting medium 16 fills the gap between the outer cylinder 12 and the inner cylinder 13, increasing the theoretical contact area between the heat source (inner cylinder 13) and the outer cylinder 12. The heat-conducting medium 16 is generally silicone oil.
[0034] In one embodiment, the outer cylinder 12 includes a first cylinder wall 121 and a second cylinder wall 122, a heat exchange cavity 141 is formed between the first cylinder wall 121 and the second cylinder wall 122, and a heat exchange medium is filled between the first cylinder wall 121 and the inner cylinder 13; the rotary kiln cylinder heat dissipation recovery and utilization device 100 also includes a heat pipe 31, the hot end of the heat pipe 31 extends into the heat exchange medium and fits with the first cylinder wall 121, and the cold end of the heat pipe 31 extends into the heat exchange cavity 141. In the present application, the hot end of the heat pipe 31 is attached to the first cylinder wall 121 and is in the heat exchange medium, that is, the hot end of the heat pipe 31 is in a state of being wrapped by the heat source, and the working medium at the hot end of the heat pipe 31 evaporates rapidly and absorbs a large amount of heat, thereby converting the liquid state into a gaseous state. By using evaporation to cool down, the heat of the inner cylinder 13 can be quickly exported to the heat exchange cavity 141 where the cold end of the heat pipe 31 is located. At the same time, the water flowing in the heat exchange cavity 141 can quickly cool down the cold end of the heat pipe 31, so that the working medium in the heat pipe 31 condenses and releases the previously absorbed heat, thereby improving the heat conduction efficiency. Due to the existence of the heat pipe 31, the temperature of the cold end of the heat pipe 31 can theoretically reach a temperature lower than the temperature before the water enters the heat exchange cavity 141. The temperature of the hot end of the heat pipe 31 must be greater than the temperature of the inner cylinder 13, thereby increasing the heat exchange temperature and improving the heat exchange efficiency.
[0035] It can be understood that the extension direction of the hot end of the heat pipe 31 is the same as the axial direction of the inner tube 13, that is, one heat pipe 31 can achieve the cooling of a section of the structure on the inner tube 13, reduce the use of heat pipes 31, and reduce costs. There are multiple heat pipes 31, and multiple heat pipes 31 are arranged in groups. Multiple groups of heat pipes 31 are arranged at intervals along the outer periphery of the inner tube 13, and each group of heat pipes 31 is staggered along the axial direction of the inner tube 13, thereby ensuring the heat exchange effect at each location, and the clinker is continuously cooled during the transportation to the outlet, that is, the transportation and cooling of the clinker are achieved simultaneously, and it can be directly connected with the subsequent process equipment.
[0036] In one embodiment, the heat exchange chamber 141 is covered with a heat insulation layer 33. The heat radiation and heat recovery device 100 of the entire rotary kiln cylinder is reduced to improve the heat utilization rate of the lepidolite clinker.
[0037] The inner cylinder 13 is in a relatively closed state for the convenience of feeding. The inner cylinder 13 includes a fixed section 131 and a rotating section 132. The top of the fixed section 131 has a feeding port for the feeding device 35 to extend into; the fixed section 131 is docked with the rotating section 132, and the inner wall of the rotating section 132 is provided with a spiral stirring blade 133, and the stirring blade 133 partially extends into the inner cavity of the fixed section 131 to scrape the surface of the inner cavity of the fixed section. The feeding port of the feeding device 35 can be tilted toward the rotating section 132. Due to the inertia of the clinker during the transportation process, most of the clinker will fall into the rotating section 132. The stirring blade 133 rotates with the rotating section 132 of the inner cylinder 13 to achieve the cutting, crushing and transportation of the clinker. The left end of the stirring blade 133 extends into the fixed section 131, and the clinker leaking into the fixed section 131 can be transported into the rotating section 132 to avoid the accumulation of clinker in the fixed section 131.
[0038] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.
Claims
1. A rotary kiln cylinder heat dissipation recovery device for recovering waste heat from lepidolite clinker, characterized in that: The rotary kiln cylinder heat dissipation recovery and utilization device comprises: A kiln cylinder, the kiln cylinder comprising a support frame, an outer cylinder and an inner cylinder, the outer cylinder being arranged on the support frame, the inner cylinder being rotatably arranged in the outer cylinder, and the outer cylinder being in heat exchange contact with the inner cylinder, a heat exchange cavity being formed in the outer cylinder and being provided with an inlet and an outlet communicating with the heat exchange cavity; The heat exchange circuit comprises a water replenishment branch and an evaporation branch, wherein the water replenishment branch is connected to the inlet to supply water to the heat exchange chamber; and the evaporation branch is connected to the outlet to discharge air formed by heat exchange evaporation.
2. The rotary kiln shell heat dissipation recovery and utilization device according to claim 1, characterized in that: The evaporation branch is provided with a steam generator, which includes a gas-liquid separator and an evaporation chamber. The liquid outlet of the gas-liquid separator is connected to the evaporation chamber. The evaporation chamber is correspondingly provided with a heater. The heater heats the liquid water in the evaporation chamber to form steam. The gas outlet of the gas-liquid separator merges with the steam formed by evaporation in the evaporation chamber and is discharged.
3. The rotary kiln shell heat dissipation recovery and utilization device according to claim 1, characterized in that: The heat exchange circuit also includes a water replenishment branch, which is communicated with the heat exchange chamber. A water replenishment pump, a booster circulation pump and a one-way valve are arranged in series on the water replenishment branch.
4. The rotary kiln shell heat dissipation recovery and utilization device according to claim 1, characterized in that: The water inlet and the water outlet of the heat exchange chamber are respectively arranged at two ends of the kiln shell.
5. The rotary kiln shell heat dissipation recovery and utilization device according to claim 1, characterized in that: A heat-conducting medium is filled between the outer cylinder and the inner cylinder.
6. The rotary kiln shell heat dissipation recovery and utilization device according to claim 5, characterized in that: The outer cylinder comprises a first cylinder wall and a second cylinder wall, the heat exchange cavity is formed between the first cylinder wall and the second cylinder wall, and a heat exchange medium is filled between the first cylinder wall and the inner cylinder; The rotary kiln cylinder heat dissipation recovery device also includes a heat pipe, the hot end of the heat pipe extends into the heat exchange medium and fits with the first cylinder wall, and the cold end of the heat pipe extends into the heat exchange cavity.
7. The rotary kiln shell heat dissipation recovery and utilization device according to any one of claims 1 to 6, characterized in that: The heat exchange cavity jacket is provided with a heat insulation layer.
8. The rotary kiln shell heat dissipation recovery and utilization device according to any one of claims 1 to 6, characterized in that: The inner cylinder includes a fixed section and a rotating section, the top of the fixed section is provided with a feed port for a feeding device to extend into; the fixed section is docked with the fixed section, the inner wall of the rotating section is provided with a spiral stirring blade, and the stirring blade partially extends into the inner cavity of the fixed section to scrape the surface of the inner cavity of the fixed section.