High-temperature solid particle waste heat recovery device
The device addresses inefficiencies in solid waste heat recovery by segregating particles by size for tailored heat exchange, enhancing efficiency and utilization.
Patent Information
- Application Number
- CN202323495571.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-21
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2033-12-21
AI Technical Summary
Existing solid waste heat recovery devices face inefficiencies due to varying particle sizes leading to inconsistent heat exchange efficiencies, resulting in waste of waste heat and reduced efficiency.
A high-temperature solid particle waste heat recovery device that segregates high-temperature particles by size into different heat exchange containers, utilizing homogenizing and non-homogenizing methods to ensure consistent heat exchange efficiency.
Enhances heat exchange efficiency by ensuring synchronized heat release across particles of varying sizes, improving overall heat recovery and utilization.
Smart Images
Figure CN222211366U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of waste heat recovery, in particular to a high-temperature solid particle waste heat recovery device. Background Art
[0002] The waste heat resources of high-energy-consuming industries are very abundant, including product waste heat, waste gas waste heat and solid waste heat. Product waste heat usually comes from the heat energy generated in the production process, and waste gas waste heat is the heat energy carried in the waste gas discharged during production. These two waste heat resources have been relatively effectively recovered and reused. However, in contrast, solid waste heat resources have always faced challenges, and mature and effective ways of utilization have not yet been found. Solid waste heat mainly refers to the thermal energy of solid waste or solid product particles generated in high-energy-consuming industries. This thermal energy usually exists in the form of sensible heat and has not yet been fully recovered and utilized. For solid product particles, for example, solid product particles are ferrite pellets, ceramic particles, steel slag, etc. At present, for the above-mentioned solid product particles, the main way to recover waste heat is medium heat exchange. This heat exchange method is designed to use equipment such as heat exchangers or heat pipes to transfer the heat in the solid product particles to other media (such as water or air). These media can be further used for heating or generating steam to supply industrial processes or generate electricity. Existing solid particle waste heat recovery devices such as Figure 1 As shown, high-temperature particles such as high-temperature pellets 1 are transported to the pellet heat exchange container 2, and cold air or air passes through the pellet heat exchange container 2 to perform a corresponding heat exchange process. The pellets in the pellet heat exchange container 2 enter the cooling pellet container 3 after heat exchange and wait to enter the subsequent process. In the above device, there are differences in the particle size of the pellets, which will lead to different heat exchange efficiencies between large and small particles of synchronous high temperature, and heat cannot be released synchronously during the heat exchange process, resulting in waste of waste heat or reduced efficiency. Utility Model Content
[0003] In order to solve the above technical problems, the utility model provides a high-temperature solid particle waste heat recovery device, a high-temperature screening device for receiving high-temperature particles, the high-temperature screening device is respectively connected to at least one large particle heat exchange container and at least one small particle heat exchange container; the large particle heat exchange container is a homogenization heat exchange container or a heat exchange container combining homogenization and non-homogenization, and the large particle heat exchange container is connected to the small particle heat exchange container. By setting the high-temperature screening device, high-temperature particles such as high-temperature balls are divided into at least 2 or more types with similar or consistent particle sizes, and then they are placed in different heat exchange containers respectively, and then the high-temperature balls with similar or consistent particle sizes are subjected to corresponding heat exchange through a heat exchange medium, so that balls with different particle sizes can obtain effective heat exchange, avoiding the phenomenon of inconsistent heat exchange efficiency caused by inconsistent sizes of high-temperature balls, and improving the heat exchange efficiency.
[0004] In one embodiment, the large particle heat exchange container is a homogenization heat exchange container for mixing cooled small particles with high-temperature large particles for heat exchange.
[0005] In one embodiment, a cooled small particle silo is provided between the large particle heat exchange container and the small particle heat exchange container. By providing the cooled small particle silo, temporary storage and turnover of the cooled small particle pellets can be achieved.
[0006] In one embodiment, the small particle heat exchange container is a non-homogeneous heat exchange container, which is used for non-homogeneous heat exchange of high-temperature small particles. At this time, heat exchange can be quickly carried out for small particle balls, so that a part of the balls, especially the small particle balls, can be quickly cooled down, and a part of the balls can enter the subsequent process more quickly; the large particle heat exchange container is used for homogenous heat exchange between the cooled small particles and the high-temperature large particles. The cooled small particle balls enter the large particle heat exchange container, so that the high-temperature large particles in the container meet the low-temperature small particle balls, and the two are quickly heat exchanged. At the same time, the two are of the same material, so homogenous heat exchange can be achieved to ensure the purity of the product.
[0007] In one embodiment, the small particle heat exchange container is provided with a first heat exchange medium inlet and a first heat exchange medium outlet.
[0008] In one embodiment, the large particle heat exchange container is provided with a second heat exchange medium inlet and a second heat exchange medium outlet.
[0009] In one embodiment, the large particle heat exchange container further has or is connected to a first screening device; the first screening device is connected to the small particle heat exchange container. After screening by the first screening device, the small particle pellets that have obtained heat enter the small particle heat exchange container for heat exchange. Preferably, the large particle heat exchange container has a first screening device, the first screening device is connected to the small particle heat exchange container, and the large particle heat exchange container, the first screening device, and the small particle heat exchange container form a circulating heat exchange unit. Alternatively, a circulating heat exchange unit is formed between the small particle heat exchange container, the cooled small particle silo, the large particle heat exchange container, and the first screening device, so that the cooled small particle pellets enter the large particle heat exchange container for continuous heat exchange. The high-temperature large particle pellets become medium-temperature large particles after losing part of their heat. At this time, the small particle pellets in the cooled small particle silo or after heat exchange in the small particle heat exchange container will input the small particle pellets into the large particle heat exchange container again, continue to perform corresponding homogeneous heat exchange, and further obtain and utilize the heat of the large particle pellets.
[0010] In one embodiment, a medium-temperature large particle heat exchange container is further included, the first screening device is connected to the medium-temperature large particle heat exchange container; and the small particle heat exchange container or the cooled small particle silo is connected to the medium-temperature large particle heat exchange container. After being screened by the first screening device, the high-temperature large particle balls enter the medium-temperature large particle heat exchange container after losing part of the heat. At this time, the small particle balls in the cooled small particle silo or after heat exchange in the small particle heat exchange container will be input into the medium-temperature large particle heat exchange container, and the corresponding homogeneous heat exchange will be continued to be performed, so as to further obtain and utilize the heat of the large particle balls.
[0011] In one embodiment, the medium-temperature large particle heat exchange container has or is connected to a second screening device.
[0012] In one embodiment, the second screening device is also connected to the small particle heat exchange container or the cooled small particle silo. By setting the second screening device, the screened small particle balls enter the small particle heat exchange container for heat exchange, or enter the cooled small particle silo for temporary storage or turnover, thereby increasing the utilization rate of the heat of the large particle balls.
[0013] In one embodiment, it also includes a powder making system, and the powder making system is connected to the cooled small particle silo and the second screening device. This means that the large particle balls that have passed through the second screening device and the small particle balls in the cooled small particle silo are subjected to powder making. Of course, it is not limited to the above two structures connecting the powder making system. One or more of the large particle heat exchange container, the small particle heat exchange container, the first screening device, and the medium temperature large particle heat exchange container can be connected to the powder making system, and the specific adjustment can be made according to the needs.
[0014] In the above technical solution, homogeneous heat exchange refers to the heat exchange process of the same material ball with the same form (for example, large and small particles) or different forms (for example, particles and powder), and non-homogeneous heat exchange refers to the heat exchange process between different materials (for example, particles and cold air). BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to more clearly illustrate the technical solutions in the specific implementation modes of the present invention, the following is a brief introduction to the drawings required for use in the specific implementation modes. Obviously, the drawings described below are some implementation modes of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0016] Figure 1 It is a structural schematic diagram of a high-temperature solid particle waste heat recovery device of the prior art;
[0017] Figure 2It is a structural schematic diagram of a high-temperature solid particle waste heat recovery device of the utility model;
[0018] Figure 3 It is a structural schematic diagram of a high-temperature solid particle waste heat recovery device of the utility model;
[0019] Figure 4 It is a structural schematic diagram of a high-temperature solid particle waste heat recovery device of the utility model;
[0020] Figure 5 It is a structural schematic diagram of a high-temperature solid particle waste heat recovery device of the utility model;
[0021] Figure 6 It is a structural schematic diagram of a high-temperature solid particle waste heat recovery device of the utility model;
[0022] The reference numerals in the figure are as follows: 1-high-temperature pellets; 2-pellet heat exchange container; 3-cooling pellet container; 4-high-temperature pellet silo; 5-high-temperature screening device; 6-large particle heat exchange container; 7-small particle heat exchange container; 8-first heat exchange medium inlet; 9-first heat exchange medium outlet; 10-pulverizing system; 11-cooled small particle silo; 13-second heat exchange medium inlet; 14-second heat exchange medium outlet; 15-first screening device; 16-medium-temperature large particle heat exchange container; 17-second screening device. DETAILED DESCRIPTION
[0023] The following is a clear and complete description of the contents of the utility model in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, but not all of the embodiments. The embodiments in the utility model and other embodiments obtained by ordinary technicians in this field without creative work are all within the scope of protection of the utility model.
[0024] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.
[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it 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 it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0026] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
[0027] Example 1
[0028] like Figure 2 As shown, this embodiment discloses a high-temperature solid particle waste heat recovery device, which includes a high-temperature screening device 5 for receiving high-temperature pellets, and the high-temperature screening device 5 is respectively connected to at least one large particle heat exchange container 6 and at least one small particle heat exchange container 7. Specifically, the high-temperature screening device 5 screens the high-temperature pellets into high-temperature pellets of at least 2 particle sizes. In this embodiment, the pellets are screened into 2 types, and the high-temperature pellets of the 2 particle sizes enter the large particle heat exchange container 6 and the small particle heat exchange container 7 respectively. Of course, there is no specific limitation on the number of large particle heat exchange containers 6 and small particle heat exchange containers 7. They can be divided according to the size of the screened particles or according to the specific capacity. In this embodiment, there are specifically 1 large particle heat exchange container 6 and 1 small particle heat exchange container 7. Whether it is the large particle heat exchange container 6 or the small particle heat exchange container 7, the specific shape is not specifically limited and can be determined according to the specific design or specific needs, such as a channel, a bin, a heat exchanger, etc.; the large particle heat exchange container 6 is a homogenizing heat exchange container or a heat exchange container combining homogenization and non-homogenization, which is used for homogenizing heat exchange or heat exchange in a combination of homogenizing and non-homogenizing ways. Preferably, the large particle heat exchange container 6 is used for homogenizing heat exchange between cooled small particles and high-temperature large particles; the small particle heat exchange container 7 is a non-homogenizing heat exchange container, which is used for non-homogenizing heat exchange. Preferably, the small particle heat exchange container 7 is used for non-homogenizing heat exchange between high-temperature small particles; the large particle heat exchange container 6 is connected to the small particle heat exchange container 7, that is, the small particle balls cooled by the small particle heat exchange container 7 enter the large particle heat exchange container 6 and perform homogenous heat exchange with the large particle balls. As for the source of the high-temperature pellets, it can be on the production line, such as a sintering kiln, a sintering furnace, a rotary kiln or a rotary kiln, or it can be in an intermediate temporary storage or transfer container, such as a high-temperature pellet bin 4.
[0029] Further, if Figure 3As shown, a cooled small particle silo 11 is provided between the large particle heat exchange container 6 and the small particle heat exchange container 7. In this embodiment, the cooled small particle silo 11 is provided on the particle conveying pipeline between the large particle heat exchange container 6 and the small particle heat exchange container 7, that is, the small particle pellets cooled by the small particle heat exchange container 7 are input into the cooled small particle silo 11. The cooled small particle pellets in the cooled small particle silo 11 enter the large particle heat exchange container 6 to perform homogeneous heat exchange with the large particle pellets.
[0030] The heat exchange method of the small particle heat exchange container 7 is not specifically limited. In one embodiment, the small particle heat exchange container 7 is provided with a first heat exchange medium inlet 8 and a first heat exchange medium outlet 9, and their positions are not specifically limited and can be determined according to specific equipment or design. In this embodiment, the first heat exchange medium is cold air, with the inlet at the bottom and the outlet at the top.
[0031] The large particle heat exchange container 6 can also perform heat exchange by a non-homogeneous heat exchange method, and the heat exchange method is not specifically limited. In one embodiment, the large particle heat exchange container 6 is provided with a second heat exchange medium inlet 13 and a second heat exchange medium outlet 14, and their positions are not specifically limited and can be determined according to specific equipment or design. In this embodiment, the first heat exchange medium is cold air, with the inlet at the bottom and the outlet at the top.
[0032] As for the final destination of the large particle balls and the small particle balls, it can be selected according to the specific balls. In this embodiment, the large particle heat exchange container 6, the small particle heat exchange container 7 and the cooled small particle silo 11 can be selectively connected to the powder making system 10 for powder making, so as to carry out the subsequent preparation unit. As for which structure or structures are connected to the powder making system 10, there is no specific limitation, and the connection can be selected according to actual conditions. In this embodiment, the large particle heat exchange container 6 and the cooled small particle silo 11 are connected to the powder making system 10 for powder making.
[0033] Example 2
[0034] The present embodiment discloses a high-temperature solid particle waste heat recovery device, which is a variation of the embodiment 1, the difference being that: in the present embodiment, the second heat exchange medium inlet 13 and the second heat exchange medium outlet 14 are not provided on the large particle heat exchange container 6; specifically, the large particle heat exchange container 6 is connected to a first screening device 15, the first screening device 15 is provided on the large particle heat exchange container 6 or exists independently, the first screening device 15 is connected to the small particle heat exchange container 7, that is, after the heat exchange of the large particle heat exchange container is completed, the particulate material therein is screened and separated by the first screening device 15, and a part of it (small particles) enters the small particle heat exchange container 7 to continue heat exchange.
[0035] In this embodiment, the large particle heat exchange container 6, the small particle heat exchange container 7, the cooled small particle silo 11, and the first screening device 15 can be operated cyclically to form a cyclic heat exchange unit, that is, Figure 4 Part A. Of course, in order to improve efficiency, a corresponding controller can be used for control.
[0036] Of course, if Figure 5 As shown, when the recovery device does not include the cooled small particle silo 11, the operation between the large particle heat exchange container 6, the small particle heat exchange container 7, and the first screening device 15 (which is a part of the large particle heat exchange container) can be cyclically performed to form a cyclic heat exchange unit. Of course, in order to improve efficiency, a corresponding controller can be used for control.
[0037] As for the final destination of the large particle balls and the small particle balls, it is specifically selected according to the actual situation. In this embodiment, the first screening device 15 and the cooled small particle silo 11 are connected to the powder making system 10 for powder making.
[0038] Example 3
[0039] This embodiment discloses a high-temperature solid particle waste heat recovery device, which is a variation of Embodiment 2, except that: the first screening device 15 is connected to the medium-temperature large particle heat exchange container 16, the cooled small particle silo 11 or the small particle heat exchange container 7 is connected to the medium-temperature large particle heat exchange container 16, preferably, as Figure 6 As shown, the cooled small particle silo 11 is connected to the medium-temperature large particle heat exchange container 16, that is, the large particle balls or materials screened by the first screening device 15 enter the medium-temperature large particle heat exchange container 16 and are mixed with the cooled small particle balls or materials entering the container for heat exchange; at the same time, the medium-temperature large particle heat exchange container 15 is also connected to the small particle heat exchange container 7 through the second screening device 17, that is, the large and small particle balls passing through the medium-temperature large particle heat exchange container 15 are screened by the second screening device 17 and divided into two parts, one part of which (small particle balls) enters the small particle heat exchange container 7 to continue heat exchange, so as to maximize the utilization of the waste heat of the large particles.
[0040] As for the final destination of the large particle balls and the small particle balls, it is specifically selected according to the actual situation. In this embodiment, the second screening device 17 and the cooled small particle silo 11 are connected to the powder making system 10 for powder making.
[0041] In Example 2 and Example 3, for large particle balls, homogeneous heat exchange is basically achieved, the introduction of foreign impurities is reduced, and the purity of the product is improved.
[0042] In the utility model, the above-mentioned various heat exchange containers may include a solid flow acceleration device, such as an agitator or a blower, etc., which is selected according to the heat exchange container.
[0043] In the present invention, the connection between the components and / or structures can be realized by corresponding conveying devices, such as belt conveyor, bucket elevator, pneumatic conveyor, scraper conveyor, and the specific selection can be made according to the actual situation. Of course, part of the conveying can also be carried out by pipeline, such as particle conveying pipeline, etc.
[0044] It should be noted that the high-temperature solid particles of the utility model are preferably ferrite balls, and of course, high-temperature balls or high-temperature particles that meet the requirements of the utility model can be used. As for the specific shape, there is no specific limitation, and it can be a regular shape or an irregular shape, specifically, regular or irregular shaped large and small particles, blocks or spheres, etc. At the same time, the screening device of the utility model can select equipment suitable for high-temperature screening according to actual conditions.
[0045] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.
Claims
1. A high-temperature solid particle waste heat recovery device, characterized in that: A high-temperature screening device for receiving high-temperature particles, wherein the high-temperature screening device is respectively connected to at least one large-particle heat exchange container and at least one small-particle heat exchange container; the large-particle heat exchange container is a homogenizing heat exchange container or a heat exchange container combining homogenization and non-homogenization, and the large-particle heat exchange container is connected to the small-particle heat exchange container.
2. The high-temperature solid particle waste heat recovery device according to claim 1 is characterized in that: The large particle heat exchange container is a homogenization heat exchange container for mixing cooled small particles with high-temperature large particles for heat exchange.
3. The high-temperature solid particle waste heat recovery device according to claim 1 is characterized in that: A cooled small particle silo is arranged between the large particle heat exchange container and the small particle heat exchange container.
4. The high-temperature solid particle waste heat recovery device according to claim 1, characterized in that: The small particle heat exchange container is a non-homogeneous heat exchange container.
5. The high-temperature solid particle waste heat recovery device according to claim 4 is characterized in that: The small particle heat exchange container is provided with a first heat exchange medium inlet and a first heat exchange medium outlet.
6. The high-temperature solid particle waste heat recovery device according to claim 1, 3, 4 or 5, characterized in that: The large particle heat exchange container is provided with a second heat exchange medium inlet and a second heat exchange medium outlet.
7. The high-temperature solid particle waste heat recovery device according to claim 3 is characterized in that: The large particle heat exchange container also has or is connected to a first screening device; the first screening device is connected to the small particle heat exchange container.
8. The high-temperature solid particle waste heat recovery device according to claim 7, characterized in that: The large particle heat exchange container also has a first screening device, which is connected to the small particle heat exchange container. The large particle heat exchange container, the first screening device and the small particle heat exchange container form a circulating heat exchange unit.
9. The high-temperature solid particle waste heat recovery device according to claim 7, characterized in that: It also includes a medium-temperature large particle heat exchange container, the first screening device is connected to the medium-temperature large particle heat exchange container; and the small particle heat exchange container or the cooled small particle silo is connected to the medium-temperature large particle heat exchange container; the medium-temperature large particle heat exchange container has or is connected to a second screening device.
10. The high-temperature solid particle waste heat recovery device according to claim 9, characterized in that: The second screening device is also connected to the small particle heat exchange container or the cooled small particle silo.