Multi-section heat preservation device of calcium aluminate calcining kiln
By laying insulation bricks and casings on the inner and outer walls of calcium aluminate calcining kilns, combining heat insulation and heat exchange pipes, the problem of heat radiation waste in the calcining kilns is solved, and heat insulation and reuse are achieved.
Patent Information
- Application Number
- CN202422361057.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-26
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-09-26
AI Technical Summary
During the calcification of calcium aluminate, the heat in the calcining kiln radiates to the outside, resulting in waste of heat.
Insulation bricks are laid on the inner and outer walls of the calcining kiln body, and a casing is set on the outer side. Support rods are set between the inner wall of the sleeve and the outer wall. A heat insulation layer and a heat exchange tube are set on the inner wall of the sleeve. Cold water absorbs radiant heat through the heat exchange tube, and an insulation layer is set on the outer side to reduce heat loss and achieve heat reuse.
It effectively reduces the heat loss of the calcining kiln, improves the insulation effect, and realizes the reuse of heat.
Smart Images
Figure CN223121938U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of calcium aluminate production equipment, and specifically relates to a multi-stage heat insulation device for a calcium aluminate calcination kiln. Background Art
[0002] Calcium aluminate is a series of inorganic compounds sintered from calcium oxide and alumina at high temperatures. Due to its high hardness and melting point, it is widely used in cement, fire extinguishing materials, and steelmaking desulfurizing agents. In recent years, the state has gradually tightened the exploitation of primary mineral resources such as bauxite. If the aluminum resources in aluminum ash can be fully utilized and calcium aluminate is prepared from aluminum ash and calcium carbonate, it can greatly reduce the exploitation of primary bauxite. On the other hand, it can reduce the emission of aluminum ash and convert it into products, which has good economic and environmental benefits. Currently, the preparation of calcium aluminate from aluminum ash has become a research hotspot.
[0003] Currently, when using a calcination kiln to calcine calcium aluminate, a large part of the heat in the calcination kiln will directly radiate outward to the outside of the calcination kiln, resulting in waste of heat. Summary of the Utility Model
[0004] In order to overcome the deficiencies of the prior art, this application provides a multi-stage heat insulation device for a calcium aluminate calcination kiln.
[0005] This application is implemented as follows: A multi-stage heat insulation device for a calcium aluminate calcination kiln includes a calcination kiln body. Heat insulation bricks are laid on both the inner wall and the outer wall of the calcination kiln body. A sleeve is provided outside the calcination kiln body. There is a distance between the inner wall of the sleeve and the heat insulation brick on the outer wall of the calcination kiln body. Several support rods are provided between the inner wall of the sleeve and the outer wall of the calcination kiln body, and the support rods are used to fix the sleeve.
[0006] Optionally, the length of the sleeve is not less than the length of the calcination kiln body. One end of the support rod passes through the heat insulation brick and is fixedly connected to the outer wall of the calcination kiln body, and the other end of the support rod is connected to the inner wall of the sleeve.
[0007] Optionally, a cavity is provided inside the support rod. The cavity is cylindrical, and a rolling ball is provided inside the cavity. The outer diameter of the rolling ball is smaller than the inner diameter of the cavity, and the rolling ball can roll back and forth along the length direction of the cavity.
[0008] Optionally, heat insulation pads are provided between the end face of one end of the support rod and the outer wall of the calcination kiln body and between the end face of the other end of the support rod and the inner wall of the sleeve.
[0009] Optionally, a heat insulation layer is provided on the inner wall of the casing. The thickness of the heat insulation layer is less than the distance between the inner wall of the casing and the heat insulation bricks on the outer wall of the calcination kiln body. A plurality of heat exchange tubes are fixed on the heat insulation layer. The plurality of heat exchange tubes are arranged at intervals. The heat exchange tubes extend along the length direction of the calcination kiln body. One end of the heat exchange tube is communicated with a cold water source, and the other end of the heat exchange tube is communicated with a water-using device. The cold water source is used to convey cold water into the heat exchange tube. The cold water circulates in the heat exchange tube and flows to the water-using device after absorbing heat.
[0010] Optionally, a heat preservation layer is provided on the outer wall of the casing, and the heat preservation layer wraps the casing.
[0011] Compared with the prior art, in the present application, heat insulation bricks are provided on both the outer wall and the inner wall of the calcination kiln body, a heat preservation layer is provided on the outer wall of the casing, and a heat insulation layer is provided on the inner wall of the casing. In this way, the heat loss in the calcination kiln body can be effectively reduced. At the same time, heat exchange tubes are provided on the heat insulation pad, and the cold water in the heat exchange tubes can absorb part of the heat radiated from the calcination kiln, so as to provide hot water for the water-using device and realize the reuse of the lost heat. Description of the Drawings
[0012] Figure 1 is a schematic structural diagram of the present application;
[0013] Figure 2 is Figure 1 the enlarged structural diagram of part A in
[0014] In the figure: 1. Calcination kiln body; 2. Heat insulation brick; 3. Casing; 31. Heat insulation layer; 32. Heat exchange tube; 33. Heat preservation layer; 4. Support rod; 41. Cavity; 42. Rolling ball; 43. Heat insulation pad. Detailed Embodiments
[0015] Next, in combination with the drawings and specific embodiments, the present application will be further described. It should be noted that, on the premise of no conflict, the following described embodiments or technical features can be combined arbitrarily to form new embodiments.
[0016] Such as Figure 1-2As shown in the figure, the multi-stage heat preservation device of the calcium aluminate calcination kiln includes the calcination kiln body 1. Heat preservation bricks 2 are laid on both the inner wall and the outer wall of the calcination kiln body 1. A sleeve 3 is arranged outside the calcination kiln body 1. There is a distance between the inner wall of the sleeve 3 and the heat preservation brick 2 on the outer wall of the calcination kiln body 1. A number of support rods 4 are arranged between the inner wall of the sleeve 3 and the outer wall of the calcination kiln body 1, and the support rods 4 are used to fix the sleeve 3. Under the connection action of the support rods 4, the sleeve 3 can be reliably sleeved outside the calcination kiln body 1, and there is a distance between the inner wall of the sleeve 3 and the outer wall of the calcination kiln body 1. In this way, the space between the sleeve 3 and the calcination kiln will be filled with air, and the heat conduction effect of air is poor, which can effectively reduce the heat radiated outward by the calcination kiln body 1. Further, the setting of two layers of heat preservation bricks 2 can improve the heat preservation effect on the calcination kiln body 1, and thus reduce the heat loss.
[0017] The length of the sleeve 3 is not less than the length of the calcination kiln body 1. One end of the support rod 4 passes through the heat preservation brick 2 and is fixedly connected to the outer wall of the calcination kiln body 1, and the other end of the support rod 4 is connected to the inner wall of the sleeve 3. The length of the sleeve 3 can completely wrap the calcination kiln body 1, ensuring that the sleeve 3 can reliably reduce or block the radiation of the heat of the calcination kiln body 1.
[0018] A cavity 41 is arranged inside the support rod 4. The cavity 41 is cylindrical. A rolling ball 42 is arranged inside the cavity 41. The outer diameter of the rolling ball 42 is smaller than the inner diameter of the cavity 41, and the rolling ball 42 can roll back and forth along the length direction of the cavity 41. During the rotation of the calcination kiln body 1, the support rod 4 will also rotate. In this way, the rolling ball 42 will roll back and forth in the cavity 41, knock on both ends of the support rod 4 and generate vibration, which can play a vibration role on the heat preservation brick 2, prevent materials from adhering to the heat preservation brick 2 on the inner wall of the calcination kiln body 1, and improve the calcination effect on the materials.
[0019] Heat insulation pads 43 are arranged between the end face of one end of the support rod 4 and the outer wall of the calcination kiln body 1 and between the end face of the other end of the support rod 4 and the inner wall of the sleeve 3. Heat insulation pads 43 are arranged on both end faces of the support rod 4. While being able to realize the connection function between the sleeve 3 and the calcination kiln body 1, it can avoid heat conduction outward through the support rod 4 and reduce the heat loss to the greatest extent.
[0020] An insulating layer 31 is provided on the inner wall of the sleeve 3. The thickness of the insulating layer 31 is less than the distance between the inner wall of the sleeve 3 and the heat-insulating bricks 2 on the outer wall of the calcination kiln body 1. A number of heat exchange tubes 32 are fixed on the insulating layer 31. The number of heat exchange tubes 32 is arranged at intervals. The heat exchange tubes 32 extend along the length direction of the calcination kiln body 1. One end of the heat exchange tube 32 is communicated with a cold water source, and the other end of the heat exchange tube 32 is communicated with a water-using device. The cold water source is used to convey cold water into the heat exchange tube 32. The cold water flows in the heat exchange tube 32 and flows to the water-using device after absorbing heat. A heat-insulating layer 33 is provided on the outer wall of the sleeve 3. The heat-insulating layer 33 wraps the sleeve 3, and a heat-insulating pad 43 is provided on the inner wall of the sleeve 3. Under the combined action of the heat-insulating layer 33 and the heat-insulating pad 43, the amount of heat radiated outward through the sleeve 3 can be effectively reduced. Further, since there is flowing cold water in the heat exchange tube 32, part of the heat radiated outward from the calcination kiln body 1 through the heat-insulating bricks 2 will be absorbed by the cold water, thereby causing the cold water to be heated into hot water, and the hot water can be conveyed to the water-using device for use, realizing the reuse of the radiated heat.
[0021] The above embodiments are only the preferred embodiments of the present application and cannot be used to limit the scope of protection of the present application. Any non-substantial changes and substitutions made by those skilled in the art on the basis of the present application belong to the scope of protection required by the present application.
Claims
1. Multi-stage heat preservation device for calcium aluminate calcination kiln, characterized in that, It includes a calcining kiln body (1). Heat insulation bricks (2) are laid on both the inner wall and the outer wall of the calcining kiln body (1). A sleeve (3) is provided outside the calcining kiln body (1). There is a distance between the inner wall of the sleeve (3) and the heat insulation brick (2) on the outer wall of the calcining kiln body (1). A number of support rods (4) are provided between the inner wall of the sleeve (3) and the outer wall of the calcining kiln body (1), and the support rods (4) are used to fix the sleeve (3).
2. The multi-stage heat preservation device for calcium aluminate calcination kiln according to claim 1, wherein, The length of the sleeve (3) is not less than the length of the calcining kiln body (1). One end of the support rod (4) passes through the heat insulation brick (2) and is fixedly connected to the outer wall of the calcining kiln body (1), and the other end of the support rod (4) is connected to the inner wall of the sleeve (3).
3. The multi-stage heat preservation device for the calcium aluminate calcination kiln according to claim 2, wherein, A cavity (41) is provided in the support rod (4). The cavity (41) is cylindrical. A rolling ball (42) is provided in the cavity (41). The outer diameter of the rolling ball (42) is smaller than the inner diameter of the cavity (41), and the rolling ball (42) can roll back and forth along the length direction of the cavity (41).
4. The multi-stage heat preservation device for the calcium aluminate calcination kiln according to claim 3, characterized in that, Heat insulation pads (43) are provided between the end face of one end of the support rod (4) and the outer wall of the calcining kiln body (1) and between the end face of the other end of the support rod (4) and the inner wall of the sleeve (3).
5. The multi-stage heat preservation device for the calcium aluminate calcination kiln according to claim 4, wherein, A heat insulation layer (31) is provided on the inner wall of the sleeve (3). The thickness of the heat insulation layer (31) is smaller than the distance between the inner wall of the sleeve (3) and the heat insulation brick (2) on the outer wall of the calcining kiln body (1). A number of heat exchange tubes (32) are fixed on the heat insulation layer (31). The heat exchange tubes (32) are arranged at intervals. The heat exchange tubes (32) extend along the length direction of the calcining kiln body (1). One end of the heat exchange tube (32) is communicated with a cold water source, and the other end of the heat exchange tube (32) is communicated with a water-using device. The cold water source is used to convey cold water into the heat exchange tube (32), and the cold water flows in the heat exchange tube (32) and flows to the water-using device after absorbing heat.
6. The multi-stage heat preservation device for a calcium aluminate calcination kiln according to any one of claims 1-5, characterized in that, A heat insulation layer (33) is provided on the outer wall of the sleeve (3), and the heat insulation layer (33) wraps the sleeve (3).