High-temperature particle waste heat recovery system

Abstract

The utility model discloses a high-temperature particle waste heat recovery system which comprises a powder device and a high-temperature particle heat exchange container, and the powder device is connected with the high-temperature particle heat exchange container through a powder conveying pipeline. The powder device is a powder making device or a powder bin. The material balls in the powder device are added into the high-temperature particle heat exchange container, the corresponding heat exchange area is increased, the heat exchange efficiency of the particle material balls is improved, and the waste problem of waste heat or the efficiency problem caused by different heat exchange efficiencies due to different particles in different sizes in the prior art is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of waste heat recovery, in particular to a high-temperature particle waste heat recovery system. 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 power generation. Existing particle waste heat recovery systems such as Figure 1 As shown, the high-temperature pellets 1 are transported to the pellet heat exchange container 2, and the cold air or air passes through the pellet heat exchange container 2 to perform the corresponding heat exchange process. After the heat exchange, the pellets in the pellet heat exchange container 2 enter the cooling pellet container 3 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 at the same 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 particle waste heat recovery system, including a powder device and a high-temperature particle heat exchange container, wherein the powder device is connected to the high-temperature particle heat exchange container through a powder conveying pipeline; the powder device is a powder making device or a powder silo. By adding the pellet powder in the powder device to the high-temperature particle heat exchange container, the corresponding heat exchange area is increased, the heat exchange efficiency of the pellets is increased, and the waste of waste heat or efficiency problems caused by different heat exchange efficiencies due to different sizes of particles in the prior art are avoided.

[0004] In one embodiment, the high-temperature particle heat exchange container is provided with or connected to a non-homogeneous heat exchange structure, and the non-homogeneous heat exchange structure includes an inlet and an outlet for conveying a non-homogeneous heat exchange medium. By providing the non-homogeneous heat exchange structure, rapid heat exchange in the high-temperature particle heat exchange container is achieved.

[0005] In one embodiment, the outlet pipeline for conveying the non-homogeneous heat exchange medium is connected to a first dust removal device. The first dust removal device is provided to prevent powder from entering the next step, thereby reducing pollution or input of impurities.

[0006] In one embodiment, the powder material device is a powder making device, and the high-temperature particle heat exchange container is connected to the powder making device through a particle conveying pipeline. In this solution, the powder material device is a powder making device. At this time, the particles that have been cooled will enter the powder making device for corresponding powder making, and choose to enter the corresponding process, such as a part of them entering the high-temperature particle heat exchange container, and as for the others, they will be selected according to specific needs.

[0007] In one embodiment, a post-cooling pellet warehouse is provided between the high-temperature pellet heat exchange container and the powder making device. By providing the post-cooling pellet warehouse, the pellets after cooling can be temporarily stored so as to be circulated according to subsequent specific needs.

[0008] In one embodiment, it also includes a high-temperature screening device for screening high-temperature particles into at least two particle size grades; the high-temperature particle heat exchange container includes at least one large particle heat exchange container and at least one small particle heat exchange container connected to the high-temperature screening device; the powder device is connected to the large particle heat exchange container via the powder conveying pipeline, and the small particle heat exchange container is provided with an inlet and outlet for conveying a first non-homogeneous heat exchange medium. By providing the high-temperature screening device, the high-temperature balls are divided into at least two particle size grades, and then the high-temperature balls of one particle size grade are subjected to corresponding heat exchange through the heat exchange medium, so that the high-temperature balls of this particle size grade can obtain effective heat exchange, avoiding the occurrence of inconsistent heat exchange efficiency caused by inconsistent sizes of high-temperature balls, and improving the heat exchange efficiency. Specifically, small particle balls can be quickly heat exchanged, a portion of the balls, especially small particle balls, can be quickly cooled, and a portion of the balls can enter the subsequent process more quickly. The powder in the powder device is input into the large particle heat exchange container, and performs corresponding heat exchange with the large particle balls therein, and the heat exchange is homogeneous heat exchange, thereby ensuring the purity of the product.

[0009] In one embodiment, it also includes a powder heat exchange container and a medium-temperature screening device for screening materials in the large particle heat exchange container; the large particle heat exchange container has or is connected to the medium-temperature screening device, the medium-temperature screening device is connected to the powder heat exchange container, and the powder heat exchange container is also provided with a second inlet and outlet for conveying non-homogeneous heat exchange medium. By setting the powder heat exchange container and the medium-temperature screening device, the medium-temperature screening device screens the particles and powder in the large particle heat exchange container, and the screened powder enters the powder heat exchange container for heat exchange.

[0010] In one embodiment, the powder heat exchange container is also connected to the large particle heat exchange container. After the temperature is reduced, at least part of the powder enters the large particle heat exchange container for heat exchange.

[0011] In one embodiment, the powder material device is a powder making device, and the medium-temperature screening device is also connected to the powder making device for conveying large particles to the powder making device.

[0012] In one embodiment, a dust removal device is connected to the outlet pipeline for transporting the second non-homogeneous heat exchange medium.

[0013] In one embodiment, the powder material device is a powder making device, and a small particle material ball bin after cooling is further arranged between the small particle heat exchange container and the powder making device. By setting the small particle material ball bin after cooling, temporary storage of the small particles after cooling can be achieved.

[0014] In one embodiment, it also includes a medium-temperature large particle heat exchange container, which is respectively connected to the medium-temperature screening device and the powder device, the medium-temperature screening device is used to input a portion of the high-temperature large particles (i.e., medium-temperature large particles) that have been cooled down into the medium-temperature particle heat exchange container, and the powder device is used to input powder into the medium-temperature large particle heat exchange container, in which the powder and the medium-temperature large particles are mixed to achieve heat exchange, and the heat exchange is homogeneous heat exchange, thereby ensuring the purity of the product; the medium-temperature large particle heat exchange container has or is connected to a first screening device, and the first screening device is connected to the powder heat exchange container, and the powder obtained after screening by the first screening device enters the powder heat exchange container for heat exchange.

[0015] In one embodiment, the powder material device is a powder making device, and the first screening device is connected to the powder making device. After screening by the first screening device, the large particle balls obtained enter the powder making device for powder making.

[0016] In one embodiment, the powder screening container is also connected to a finished product manufacturing system or a powder material silo. The powder material after heat exchange can be selected for finished product manufacturing or storage processing.

[0017] 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

[0018] 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.

[0019] Figure 1 It is a structural schematic diagram of a high-temperature particle waste heat recovery system of the prior art;

[0020] Figure 2 It is a structural schematic diagram of a high-temperature particle waste heat recovery system of the utility model;

[0021] Figure 3 It is a structural schematic diagram of a high-temperature particle waste heat recovery system of the utility model;

[0022] Figure 4 It is a structural schematic diagram of a high-temperature particle waste heat recovery system of the utility model;

[0023] 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 bin; 5-high-temperature screening device; 6-large particle heat exchange container; 7-small particle heat exchange container; 8-pulverizing device; 9-medium-temperature screening device; 10-powder heat exchange container; 11-second dust removal device; 12-cooled small particle pellet bin; 13-finished product manufacturing system; 14-medium-temperature large particle heat exchange container; 15-first screening device; 16-high-temperature particle heat exchange container; 17-cooled pellet bin; 18-first dust removal device; 19-first heat exchange medium inlet; 20-first heat exchange medium outlet; 21-second heat exchange medium inlet; 22-second heat exchange medium outlet; 23-heat exchange medium inlet; 24-heat exchange medium outlet. DETAILED DESCRIPTION

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] Example 1

[0029] like Figure 2 As shown, the present embodiment discloses a high-temperature particle waste heat recovery system, including a powder device and a high-temperature particle heat exchange container 16, wherein the powder device is connected to the high-temperature particle heat exchange container 16 through a powder conveying pipeline, and the specific shape and structure of the high-temperature particle heat exchange container 16 are not specifically limited, and can be determined according to a specific design or specific needs, such as a channel, a bin, a heat exchanger, etc. The high-temperature particle heat exchange container 16 is provided with or connected with a non-homogeneous heat exchange structure, and the non-homogeneous heat exchange structure is not specifically limited. In the present embodiment, the non-homogeneous heat exchange structure includes an inlet and an outlet for conveying a non-homogeneous heat exchange medium. Specifically, the high-temperature particle heat exchange container 16 is provided with a heat exchange medium inlet 23 and a heat exchange medium outlet 24, and the positions thereof are not specifically limited and can be determined according to specific equipment or design. In the present embodiment, the heat exchange medium is cold air, with the inlet at the bottom and the outlet at the top; further, the outlet pipeline for conveying the non-homogeneous heat exchange medium is connected to a first dust removal device 18, and specifically, the first dust removal device 18 is connected to the pipeline after the heat exchange medium outlet 4. The powder device is a powder making device 8 or a powder silo. As for the powder silo, it is marked in the figure. As for the position of its connection, there is no specific limitation. It can exist alone and can be located behind a certain structure or device, such as the powder making device 8. When in use, it can be specifically connected as needed.

[0030] In one embodiment, the powder device is a powder making device 8, and the high-temperature particle heat exchange container 16 is connected to the powder making device 8 through a particle conveying pipeline, which means that at least part of the powder made by the powder making device 8 is returned to the high-temperature particle heat exchange container 16 for corresponding heat exchange.

[0031] In one embodiment, a post-cooling pellet bin 17 is provided between the high-temperature pellet heat exchange container 16 and the powder making device 8 .

[0032] As for the connection of the powder making device 8 or the device behind the powder silo, there is no specific limitation. Preferably, the powder making device 8 is connected to the finished product manufacturing system 13; of course, the powder making device can also be connected to the powder silo, and the powder silo is further connected to the finished product manufacturing system 13; of course, other connection methods can also be set according to actual needs.

[0033] As for where the high-temperature pellets in the high-temperature particle heat exchange container 16 come from, there is no specific restriction. It can be from a production line, such as a sintering kiln, sintering furnace, rotary kiln or rotary kiln, or it can be in an intermediate temporary storage or transfer container, such as a high-temperature pellet bin 4.

[0034] Example 2

[0035] like Figure 3 As shown, the present embodiment provides a high-temperature particle waste heat recovery system, which includes a high-temperature screening device 5 for screening high-temperature particles into at least two particle size grades, and at least one large particle heat exchange container 6 and at least one small particle heat exchange container 7 connected to the high-temperature screening device 5, and a powder device; the powder device is a powder making device 8 or a powder silo, and the powder device is connected to the large particle heat exchange container 6 via the powder conveying pipeline, and the small particle heat exchange container 7 is provided with an inlet and an outlet for conveying a first non-homogeneous heat exchange medium, and the inlet and outlet of the first non-homogeneous heat exchange medium are not specifically limited. In the present embodiment, the small particle heat exchange container 7 is provided with a first heat exchange medium inlet 19 and a first heat exchange medium outlet 20, and the positions of the two are not specifically limited and can be determined according to the specific equipment or design. In the present embodiment, the first heat exchange medium is cold air, and the inlet is at the bottom and the outlet is at the top.

[0036] In one embodiment, the invention further comprises a powder heat exchange container 10 and a medium-temperature screening device 9 for screening the material in the large particle heat exchange container 6. As for the medium-temperature screening device 9, it can be integrated with the large particle heat exchange container 6, or it can be connected to the conveying pipeline or conveying path behind the large particle heat exchange container 6. The medium-temperature screening device 9 is connected to the powder heat exchange container 10. After screening by the medium-temperature screening device 9, the powder enters the powder heat exchange container 10 for heat exchange. The powder heat exchange container 10 The inlet and outlet of the second non-homogeneous heat exchange medium are arranged on the top. Specifically, the powder heat exchange container 10 is provided with a second heat exchange medium inlet 21 and a heat exchange medium outlet 22, and the positions thereof are not specifically limited and can be determined according to the specific equipment or design. In the present embodiment, the heat exchange medium is cold air, the inlet is at the bottom, and the outlet is at the top. Furthermore, the outlet pipeline of the second non-homogeneous heat exchange medium is connected with a second dust removal device 11. Specifically, the second dust removal device 11 is arranged on the pipeline behind the heat exchange medium outlet 22.

[0037] In one embodiment, the powder heat exchange container 10 is connected to the large particle heat exchange container 6, that is, at least a portion of the powder after heat exchange and cooling enters the large particle heat exchange container for heat exchange.

[0038] In one embodiment, the powder device is a powder making device 8, and the medium-temperature screening device 9 is connected to the powder making device 8, that is, after screening by the medium-temperature screening device 9, the screened large particles enter the powder making device 8 for powder making.

[0039] In one embodiment, the powder material device is a powder making device 8 , and a cooled small particle material ball bin 12 is further provided between the small particle heat exchange container 7 and the powder making device 8 .

[0040] Preferably, the operation between the large particle heat exchange container 6, the medium temperature screening device 9 and the powder heat exchange container 10 can be cyclically performed, that is, Figure 3 In order to improve the efficiency, the corresponding controller can be used to control the A part.

[0041] As for the connection of the device behind the powder making device 8 or the powder material bin, there is no specific limitation. Preferably, the powder making device 8 is connected to the finished product manufacturing system 13; of course, the powder making device can also be connected to the powder material bin, and the powder material bin is further connected to the finished product manufacturing system 13; the powder heat exchange container 10 is also connected to the finished product manufacturing system 13 or the powder material bin, for manufacturing or storing part of the powder material into finished products. Of course, other connection methods can also be set according to actual needs.

[0042] As for where the high-temperature balls in the high-temperature screening device 5 come from, there is no specific restriction. It can be from a 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 ball bin 4.

[0043] Example 3

[0044] like Figure 4 As shown, this embodiment provides a high-temperature particle waste heat recovery system, which is a further variation of Example 2, specifically as follows: it also includes a medium-temperature large particle heat exchange container 14, which is respectively connected to the medium-temperature screening device 9 and the powder device, the medium-temperature screening device 9 is used to input a portion of the high-temperature large particles (i.e., medium-temperature large particles) that have been cooled into the medium-temperature particle heat exchange container 14, and the powder device is used to input powder into the medium-temperature large particle heat exchange container 14, in which the powder and the medium-temperature large particles are mixed to achieve heat exchange; the medium-temperature large particle heat exchange container 14 has or is provided with a first screening device 15 or the medium-temperature large particle heat exchange container 14 is connected to the first screening device 15, preferably, as Figure 4 As shown, the medium-temperature large particle heat exchange container 14 is connected to the first screening device 15, and the first screening device 15 is connected to the powder heat exchange container 10. After screening by the first screening device 15, the obtained powder enters the powder heat exchange container 10 for heat exchange.

[0045] In one embodiment, the powder device is a powder making device 8, and the first screening device 15 is connected to the powder making device 8, that is, after screening by the first screening device 15, large particles enter the powder making device 8 for powder making. Of course, the large particles after screening can also enter other devices or other processes for other operations.

[0046] In one embodiment, the powder screening container 21 is also connected to a finished product manufacturing system 13 or a powder silo.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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 particle waste heat recovery system, characterized in that: It includes a powder device and a high-temperature particle heat exchange container, wherein the powder device is connected to the high-temperature particle heat exchange container through a powder conveying pipeline; the powder device is a powder making device or a powder silo; The high-temperature particle heat exchange container is provided with or connected to a non-homogeneous heat exchange structure, and the non-homogeneous heat exchange structure includes an inlet and an outlet for conveying a non-homogeneous heat exchange medium.

2. The high-temperature particle waste heat recovery system according to claim 1 is characterized in that: The outlet pipeline for conveying the non-homogeneous heat exchange medium is connected to a first dust removal device.

3. The high-temperature particle waste heat recovery system according to claim 1 or 2, characterized in that: The powder material device is a powder making device, and the high-temperature particle heat exchange container is connected to the powder making device through a particle conveying pipeline.

4. The high-temperature particle waste heat recovery system according to claim 1, characterized in that: It also includes a high-temperature screening device for screening high-temperature particles into at least two particle size grades; the high-temperature particle heat exchange container includes at least one large particle heat exchange container and at least one small particle heat exchange container connected to the high-temperature screening device; the powder device is connected to the large particle heat exchange container via the powder conveying pipeline, and the small particle heat exchange container is provided with an inlet and an outlet for conveying a first non-homogeneous heat exchange medium.

5. The high-temperature particle waste heat recovery system according to claim 4 is characterized in that: It also includes a powder heat exchange container and a medium-temperature screening device for screening materials in the large-particle heat exchange container. The large-particle heat exchange container has or is connected to the medium-temperature screening device. The medium-temperature screening device is connected to the powder heat exchange container. The powder heat exchange container is also provided with a second inlet and outlet for conveying non-homogeneous heat exchange media.

6. The high-temperature particle waste heat recovery system according to claim 5, characterized in that: The powder heat exchange container is also connected to the large particle heat exchange container.

7. The high-temperature particle waste heat recovery system according to claim 5 or 6, characterized in that: The powder material device is a powder making device, and the medium-temperature screening device is also connected to the powder making device for conveying large particles to the powder making device.

8. The high-temperature particle waste heat recovery system according to claim 5 or 6, characterized in that: The second outlet pipeline for conveying the non-homogeneous heat exchange medium is connected with a second dust removal device.

9. The high-temperature particle waste heat recovery system according to claim 5 or 6, characterized in that: It also includes a medium-temperature large particle heat exchange container, which is respectively connected to the medium-temperature screening device and the powder device. The medium-temperature large particle heat exchange container has or is connected to a first screening device, and the first screening device is connected to the powder heat exchange container.

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