A two-stage dense phase moving bed heat exchange device

Abstract

The present invention discloses a two-stage dense-phase moving bed heat exchanger, including a hot flue gas outlet disposed at the top of the moving bed heat exchanger. The interior of the moving bed heat exchanger is divided into an upper section and a lower section. The upper section is a dense-phase buried pipe layer, within which a vibrating buried pipe layer is disposed. The bottom of the lower section is provided with an air distribution device. The moving bed heat exchanger is provided with air cooling ports on both sides of the upper section. The bottom of the moving bed heat exchanger is a funnel-shaped structure, and a discharge device is provided at the outlet. The device of the present invention has a reasonable layout and uniform air distribution, which is conducive to slag discharge, loosening the material layer, and uniforming the material layer. It can be effectively used to recover the high-temperature sensible heat of semi-molten particles.

Description

Technical Field

[0001] The present invention belongs to the technical field of blast furnace slag waste heat recovery, and in particular relates to a two-stage dense phase zone moving bed heat exchange device. Background Art

[0002] Water quenching and dry treatment are currently the most common methods for treating blast furnace slag. The water quenching method involves directly mixing low-temperature cooling water with high-temperature liquid slag, causing the liquid slag temperature to drop rapidly and form vitreous slag particles. This achieves the purpose of cooling and granulation, and then the water and slag are separated. The water used to wash the slag is then filtered and recycled after sedimentation. However, the water quenching process wastes a large amount of water resources, produces harmful gases such as SO2 and H2S, and cannot effectively recover the high-quality waste heat resources contained in the high-temperature liquid slag. The dry treatment method involves dry treatment of the high-temperature liquid slag, including mechanical crushing, air quenching, and centrifugal granulation.

[0003] The mechanical crushing method produces large, unevenly distributed slag particles after cooling, which is very unfavorable for subsequent applications. Although the air quenching method consumes less energy than the mechanical crushing method, the equipment is complex and energy-intensive; in addition, the air quenching method requires high fluidity of the slag. Centrifugal granulation is a dry granulation process currently attracting much attention. Compared with mechanical crushing and air quenching, centrifugal granulation is characterized by low energy consumption and compact and simple equipment. At the same time, the quality and particle size of the slag particles can be well controlled by adjusting parameters such as the rotational speed, granulator size, and air flow rate, thus showing broad application prospects.

[0004] In summary, centrifugal granulation is currently the most promising method for recovering waste heat from high-temperature slag. During dry centrifugal granulation, the high-temperature, high-viscosity slag is flung off the surface of a high-speed rotating turntable, forming droplets in the air. These tiny droplets undergo intense direct heat exchange with the heat transfer medium in the air, lowering the droplet temperature and causing a phase change on the droplet surface, forming a solidified layer. However, the heat exchange of the droplets in the space around the turntable is limited, resulting in only a thin solidified layer on the droplet surface. The inner layer remains liquid, and the overall particle temperature can still reach 800-900°C. Most existing waste heat recovery devices are in the form of moving beds or fluidized beds for gas-solid heat exchange. The moving bed uses bottom air intake to perform gas-solid heat exchange on dense-phase slag particles, thereby cooling the slag particles to the required discharge temperature and discharging from the bottom of the moving bed. The heat-exchanged air then heats water and other working fluids in heat exchange devices such as waste heat boilers for energy conversion. The fluidized bed uses a large amount of cold air entering from the bottom to blow up the slag particles for gas-solid heat exchange. Similarly, the heat-exchanged air needs to undergo energy conversion again. Although gas-solid moving bed and fluidized bed waste heat recovery devices are widely used, the waste heat recovery energy conversion loss is large. The moving bed is prone to particle bridging and adhesion. The fluidized bed waste heat recovery device needs to be arranged separately from the granulation bin to prevent interference with the granulation process and increase equipment investment costs. Its wear and tear is also not negligible. Therefore, in order to further reduce the particle temperature, prevent the particles from thermally bonding and bridging, and reduce equipment investment costs and energy conversion losses, it is necessary to strengthen the heat exchange of the particles in the moving bed and improve the heat exchange method. At the same time, it is also necessary to prevent the uncooled and solidified slag particles from bonding with each other, which will affect the smooth discharge. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to address the deficiencies in the above-mentioned prior art and provide a two-stage dense phase moving bed heat exchange device to solve the technical problem of particle adhesion caused by excessively high temperature of semi-molten particles.

[0006] The present invention adopts the following technical solutions:

[0007] A two-stage dense phase zone moving bed heat exchange device includes a hot flue gas outlet, which is arranged at the top of the moving bed heat exchange device. The interior of the moving bed heat exchange device is divided into an upper section and a lower section. The upper section is a dense phase zone buried pipe layer, and a vibrating buried pipe layer is arranged in the dense phase zone buried pipe layer. An air distribution device is arranged at the bottom of the lower section. The moving bed heat exchange device is located on both sides of the upper section. The side walls are provided with air cooling ports. The bottom of the moving bed heat exchange device is a funnel-shaped structure, and a discharge device is provided at the outlet.

[0008] Specifically, buried pipes are arranged in the buried pipe layer in the dense phase zone, and multiple buried pipes form a group of buried pipe layers. Vibrating buried pipes are arranged between upper and lower adjacent buried pipe layers, and multiple vibrating buried pipes form a group of vibrating buried pipe layers.

[0009] Furthermore, the vibration buried pipe layer includes at least 3 layers.

[0010] Furthermore, the vibrating buried pipe layer includes, from top to bottom, a first vibrating buried pipe layer, a second vibrating buried pipe layer and a third vibrating buried pipe layer. The first vibrating buried pipe layer, the second vibrating buried pipe layer and the third vibrating buried pipe layer are respectively arranged with a first air cooling port, a second air cooling port and a third air cooling port on the side walls on both sides of the upper section of the moving bed heat exchanger corresponding to the first vibrating buried pipe layer, the second vibrating buried pipe layer and the third vibrating buried pipe layer. The height of the first air cooling port is higher than the height of the buried pipe layer above the first vibrating buried pipe layer. The second air cooling port is located between the first vibrating buried pipe layer and the second vibrating buried pipe layer. The third air cooling port is located between the second vibrating buried pipe layer and the third vibrating buried pipe layer.

[0011] Furthermore, the buried pipes are arranged in a staggered or sequential manner.

[0012] Furthermore, the buried tube is a fin tube or a nail head tube with an extended heating surface.

[0013] Furthermore, the vibrating buried pipe is connected to a vibrating device, a cooling medium is provided in the vibrating buried pipe, and the vibrating device is connected to the vibrating buried pipe via an elastic connecting piece.

[0014] Specifically, the air distribution device includes a plurality of air distribution pipes arranged at intervals. Wind caps are provided on the air distribution pipes, and the distance between two adjacent air distribution pipes is the distance of one air distribution pipe diameter.

[0015] Specifically, the air cooling ports include multiple ones, which are correspondingly arranged on the side walls on both sides of the upper section of the moving bed heat exchange device.

[0016] Furthermore, the blowing angle of the air cooling port is set obliquely downward, with an angle of 30° with the horizontal direction.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects:

[0018] The present invention provides a two-stage dense phase zone moving bed heat exchange device. By arranging an air cooling port in the upper buried pipe area, high-temperature semi-molten particles can undergo gas-solid and solid-solid dual cooling medium heat exchange in the upper section, thereby strengthening the heat exchange of the semi-molten particles in the dense phase area, improving the cooling rate of the particles, and accelerating the solidification of the high-temperature semi-molten particles; a vibrating buried pipe layer is arranged in the buried pipe layer in the dense phase area to loosen and uniform the material layer and prevent the high-temperature semi-molten particles from sticking and piling up; an air distribution device is arranged in the lower section to ensure the waste heat recovery effect and perform secondary air cooling on the high-temperature material layer in the upper buried pipe area; a discharge device is arranged at the bottom of the moving bed heat exchange device to ensure smooth discharge of slag particles.

[0019] Furthermore, multiple buried pipes form a group of buried pipe layers, and vibrating buried pipes are arranged between the upper and lower adjacent buried pipe layers. Multiple vibrating buried pipes form a group of vibrating buried pipe layers. When semi-molten particles enter, the solid-solid heat exchange between the buried pipes and the semi-molten slag particles and the gas-solid heat exchange between the cooling air and the semi-molten slag particles accelerate the cooling and solidification of the semi-molten slag particles. The vibrating buried pipe layer is used to level the material layer and improve the flow of semi-molten slag particles in the high-temperature zone.

[0020] Furthermore, the vibrating buried pipes are arranged in three layers. The upper layer of vibrating buried pipes prevents the semi-molten slag particles from being reversely bonded due to long-term accumulation, and plays the role of leveling the material layer for the falling particles; the middle layer of vibrating buried pipes prevents the slag particles from bridging and clogging, and the bottom layer of vibrating buried pipes facilitates the smooth discharge of the slag particles.

[0021] Furthermore, the first vibrating buried pipe layer and the second vibrating buried pipe layer are arranged in the high-temperature zone of the buried pipe to strengthen the disturbance of the flow of semi-molten slag particles in the high-temperature zone. Cooperating with the cooling air and the buried pipe heat exchange, it can prevent the high-temperature semi-molten slag particles from returning to heat or sticking due to the long accumulation time, play the role of loosening the material layer and leveling the material layer, and improve the flow of semi-molten slag particles in the high-temperature zone. The third vibrating buried pipe layer in the low-temperature zone of the upper buried pipe loosens the solidified high-temperature slag particles and makes the material layer uniform to prevent the slag particles from being blocked and flowing poorly, so that the particles fall evenly to the lower section of the moving bed heat exchange device. The first air-cooling port layer and the second air-cooling port layer are arranged on the second vibrating buried pipe layer, and the cooling air is concentrated in the high-temperature zone of the buried pipe to avoid the problem of particle adhesion caused by the return of heat of the semi-molten slag particles in the high-temperature zone of the buried pipe.

[0022] Furthermore, the buried pipes are arranged in a staggered pattern to enhance the heat transfer of the particle flow, and the buried pipes are arranged in a straight pattern to facilitate the discharge of the particles.

[0023] Furthermore, the buried pipe may be in the form of an extended heating surface, which can enhance the composite heat exchange between the particles and the buried pipe and improve the heat exchange efficiency.

[0024] Furthermore, the vibrating buried pipe and the vibrating motor are connected by a high-temperature resistant elastic connector to achieve the buried pipe vibration effect. The vibrating buried pipe used in the present invention is a vibrating buried pipe with a cooling medium. The cooling medium can not only protect the vibrating buried pipe from high-temperature damage, but also enhance the heat exchange of high-temperature slag particles and enhance the waste heat recovery effect.

[0025] Furthermore, an air distribution duct is provided at the lower section of the moving bed, and air is supplied through the air distribution duct to perform gas-solid heat exchange on the particles, which cooperates with the buried pipe heat exchange to improve the heat exchange efficiency.

[0026] Furthermore, a cold air port is provided on the side wall of the upper section of the moving bed to prevent the semi-molten high-temperature slag particles near the side wall from thermally bonding, thereby increasing the cooling rate of the slag particles and improving the quality of the slag particles.

[0027] Furthermore, the blowing angle of the side wall air outlet is tilted downward by 30 degrees, which can prevent slag particles from entering the cold air outlet and blocking the air duct.

[0028] In summary, the device of the present invention has a reasonable layout and uniform air distribution, which is conducive to slag discharge, loose material layer and uniform material layer, and can be effectively used to recover high-temperature sensible heat of semi-molten particles.

[0029] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 Schematic diagram of the internal layout of the device of the present invention;

[0031] Figure 2 Schematic diagram of the interior and exterior wall layout of the device of the present invention;

[0032] Figure 3 Schematic diagram of buried pipes of the present invention, wherein (a) is an H-shaped finned tube buried pipe, and (b) is a nail head tube buried pipe.

[0033] Among them: 1. Air cooling port; 2. Vibrating buried pipe; 3. Air distribution device; 4. Vibrating motor; 5. Buried pipe; 6. Discharge device; 7. Smoke outlet; 201. First vibrating buried pipe layer; 202. Second vibrating buried pipe layer; 203. Third vibrating buried pipe layer; 101. First air cooling port; 102. Second air cooling port; 103. Third air cooling port. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0035] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "one side", "one end", "one side" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0036] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0037] It will be understood that when used in this specification and the appended claims, the terms “comprises” and “comprising” indicate the presence of described features, integers, steps, operations, elements and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof.

[0038] It should also be understood that the terms used in the present specification are only for the purpose of describing particular embodiments and are not intended to limit the present invention. As used in the present specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms unless the context clearly indicates otherwise.

[0039] It should be further understood that the term "and / or" used in the present description and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0040] The accompanying drawings illustrate various schematic diagrams of structures according to embodiments disclosed herein. These figures are not drawn to scale; for clarity, some details are exaggerated and some details may be omitted. The shapes of the various regions and layers shown in the figures, as well as their relative sizes and positional relationships, are merely exemplary and may deviate in practice due to manufacturing tolerances or technical limitations. Those skilled in the art may design regions / layers with different shapes, sizes, and relative positions as needed.

[0041] See also Figure 1 The present invention provides a two-stage dense phase zone moving bed heat exchange device, including an air cooling port 1, a vibrating buried pipe 2, an air distribution device 3, a vibrating motor 4, a buried pipe 5, a discharge device 6, and a flue gas outlet 7; a hot flue gas outlet 7 is arranged on the top of the moving bed heat exchange device, and an upper section and a lower section are arranged inside, the upper section is a dense phase zone buried pipe layer, and a discharge device 6 is arranged at the bottom.

[0042] The air cooling port 1 is symmetrically arranged on the side walls on both sides of the upper section of the moving bed. A number of buried pipes 5 are arranged in a staggered row in the upper section. Vibrating buried pipes 2 are arranged between the buried pipes 5 at intervals above and below. The vibrating buried pipes 2 are driven by a vibration device; the air distribution device 3 is arranged in the lower section of the moving bed, and no buried pipes 5 are set inside the lower section.

[0043] The buried pipes 5 have the same diameter and length. Several buried pipes 5 are arranged in a staggered pattern in the upper section of the moving bed heat exchanger. The arrangement of the buried pipes includes but is not limited to staggered pattern, sequential pattern and other arrangements.

[0044] See also Figure 3 The buried tube is in the form of a finned tube or a nail head tube with an extended heating surface. The buried tube form includes but is not limited to a bare tube without an extended heating surface and a buried tube form with other extended heating surfaces. The cooling medium in the buried tube includes but is not limited to water, air, thermal oil and other cooling media.

[0045] The vibration device includes but is not limited to the use of a vibration motor 4, an electromagnetic vibrator, a vibration hammer and other vibration devices

[0046] Multiple vibrating buried pipes 2 form a group of vibrating buried pipe layers, which are arranged in three layers in the middle of the buried pipes 5, including a first vibrating buried pipe layer 201, a second vibrating buried pipe layer 202 and a third vibrating buried pipe layer 203. The distance between the first vibrating buried pipe layer 201 and the second vibrating buried pipe layer 202 is smaller than the distance between the second vibrating buried pipe layer 202 and the third vibrating buried pipe layer 203.

[0047] The diameter and length of the vibration buried pipes 2 in each vibration buried pipe layer are consistent, and the cooling medium of the vibration buried pipes 2 includes but is not limited to water, air, thermal oil and other cooling media.

[0048] The first air cooling port 101, the second air cooling port 102 and the third air cooling port 103 are respectively arranged on the side walls on both sides of the upper section corresponding to the first vibration buried pipe layer 201, the second vibration buried pipe layer 202 and the third vibration buried pipe layer 203. The height of the first air cooling port 101 is higher than the height of the first layer of buried pipes 5, the position height of the second air cooling port 102 is between the heights of the first vibration buried pipe layer 201 and the second vibration buried pipe layer 202, and the position height of the third air cooling port 103 is between the heights of the second vibration buried pipe layer 202 and the third vibration buried pipe layer 203.

[0049] The slag particles move from top to bottom in the moving bed heat exchange device, and the temperature on the upper side of the buried pipe area is higher than the temperature on the lower side of the buried pipe area. The first air cooling port layer 101 and the second air cooling port layer 102 are set above the second vibrating buried pipe layer 202, and the cooling air is concentrated in the high-temperature area of ​​the buried pipe, which can avoid the problem of particle adhesion caused by the heat return of semi-molten slag particles in the high-temperature area of ​​the buried pipe.

[0050] The first vibrating buried pipe layer 201 and the second vibrating buried pipe layer 202 are arranged in the high-temperature zone of the buried pipe to strengthen the disturbance of the flow of the semi-molten slag particles in the high-temperature zone. Cooperating with the cooling air and the buried pipe heat exchange, it can prevent the high-temperature semi-molten slag particles from returning to heat or sticking due to the long accumulation time, and play the role of loosening the material layer and leveling the material layer, thereby improving the flow of the semi-molten slag particles in the high-temperature zone.

[0051] The third vibrating buried pipe layer 203 loosens the solidified high-temperature slag particles, makes the material layer uniform, and prevents the slag particles from being blocked and flowing poorly, so that the particles fall evenly to the lower section of the moving bed heat exchange device.

[0052] Among them, the blowing angles of the first air cooling port 101, the second air cooling port 102 and the third air cooling port 103 are set obliquely downward, with an angle of 30° to the horizontal direction. The distance between the first air cooling port 101 and the second air cooling port 102 is greater than the distance between the second air cooling port 102 and the third air cooling port 103. The cold air port is arranged obliquely downward at 30°, which can not only prevent slag particles from entering the cold air port and blocking the air outlet, but also supply air to the center of the material layer as much as possible, and cooperate with the bottom air supply to enhance the heat exchange effect of the internal slag particles.

[0053] See also Figure 2 The vibrating buried pipe 2 is a vibrating buried pipe with a cooling medium, and the vibrating buried pipe is connected to the vibrating motor 4 through a high-temperature resistant elastic connecting piece.

[0054] A flexible kit is provided at the connection between the vibrating buried pipe 2 and the front and rear walls of the moving bed heat exchange device.

[0055] In the present invention, an air distribution device 3 is provided at the lower section of the moving bed heat exchange device. When the slag particles fall, the cooling airflow performs countercurrent heat exchange with the particles, cooling the slag particles to a suitable discharge temperature.

[0056] The distance between the two air distribution pipes of the air distribution device 3 is the diameter of one air distribution pipe, and a wind cap is provided on the air distribution pipe.

[0057] The air distribution device 3 may be in the form of a hood-type air distribution plate, a dense-hole air distribution plate, or other forms of air distribution devices. The cooling medium blown out by the air distribution device 3 may be in the form of air, nitrogen, or other gases that can be used for cooling.

[0058] In the present invention, a flue gas outlet 7 is provided at the top of the moving bed heat exchange device, and the cooling airflow from the air cooling port of the upper buried pipe area merges with the cooling airflow from the bottom air distribution device and is discharged into the waste heat boiler through the flue gas outlet.

[0059] The flue gas outlet 7 is used to recover waste heat from the hot flue gas, and the flue gas outlet positions include but are not limited to the middle and other positions.

[0060] The discharge area at the bottom of the moving bed heat exchanger is a funnel-shaped structure, and a discharge device 6 is arranged at the slag discharge outlet. The discharge device 6 includes but is not limited to a spiral discharger, a vibrating discharger and other forms of discharge devices, which can prevent slag particles from blocking the discharge outlet and ensure stable discharge of slag particles.

[0061] When the semi-molten slag particles enter the upper section, the solid-solid heat exchange between the buried pipe 5 and the semi-molten slag particles and the gas-solid heat exchange between the cooling air and the semi-molten slag particles accelerate the cooling and solidification of the semi-molten slag particles.

[0062] The working principle of the two-stage dense phase moving bed heat exchange device of the present invention is as follows:

[0063] When the semi-molten high-temperature slag particles fall, the vibration of the vibrating buried pipe will level the falling material layer, destroy the bonded slag particles, prevent bridging, and facilitate discharge; the material layer is driven downward by gravity, and simultaneously undergoes composite heat exchange with the buried pipe and air in the upper high-temperature area, thereby improving heat exchange efficiency; as the particles move downward, the material layer temperature decreases, and in the lower area, air is supplied by the air distribution device for gas-solid heat exchange, and the temperature is reduced to the discharge temperature, and then discharged through the discharge device. The hot air after heat exchange is discharged through the outlet at the top for thermal energy utilization, and the heat exchange medium in the buried pipe can also be used for thermal energy utilization.

[0064] In summary, the present invention provides a two-stage dense phase zone moving bed heat exchange device, and the moving bed heat transfer device is arranged in two sections. The upper section is arranged with buried pipes and vibrating buried pipes. The buried pipes perform solid-solid heat exchange with high-temperature semi-molten particles, and the vibrating buried pipes intermittently vibrate to separate the bonded slag particles, loosen the material layer, and level the material layer; the first air cooling port, the second air cooling port and the third air cooling port are correspondingly arranged on both sides of the upper section, and the particles falling into the upper section are subjected to gas-solid heat exchange, and the solid-solid heat exchange of the buried pipes is coupled to accelerate the cooling and solidification of the semi-molten slag particles, thereby improving the waste heat recovery efficiency; the air distribution device arranged in the lower section is used to improve the waste heat recovery effect, and the buried pipe area is subjected to secondary air cooling; the discharge device arranged at the bottom can avoid discharge blockage and ensure smooth discharge.

[0065] The above content is only for explaining the technical idea of ​​the present invention and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the present invention shall fall within the protection scope of the claims of the present invention.

Claims

1. A two-stage dense phase moving bed heat exchange device, characterized in that: The invention comprises a hot flue gas outlet (7), the hot flue gas outlet (7) is arranged at the top of the moving bed heat exchange device, the interior of the moving bed heat exchange device is divided into an upper section and a lower section, the upper section is a dense phase buried pipe layer, a vibration buried pipe layer is arranged in the dense phase buried pipe layer, an air distribution device (3) is arranged at the bottom of the lower section, the moving bed heat exchange device is located at both side walls of the upper section and is provided with air cooling ports (1), the bottom of the moving bed heat exchange device is a funnel-shaped structure, a discharge device (6) is arranged at the outlet, a buried pipe (5) is arranged in the dense phase buried pipe layer, a plurality of buried pipes (5) form a group of buried pipe layers, a vibration buried pipe (2) is arranged between the upper and lower adjacent buried pipe layers, a plurality of vibration buried pipes (2) form a group of vibration buried pipe layers, the vibration buried pipe layer comprises at least 3 layers, and the vibration buried pipe layer comprises, from top to bottom, a first vibration buried pipe layer (201), a second vibration buried pipe layer (202) and The third vibration buried pipe layer (203) is provided. The side walls on both sides of the upper section of the moving bed heat exchange device are respectively provided with a first air cooling port (101), a second air cooling port (102) and a third air cooling port (103) corresponding to the first vibration buried pipe layer (201), the second vibration buried pipe layer (202) and the third vibration buried pipe layer (203). The height of the first air cooling port (101) is higher than the height of the buried pipe layer above the first vibration buried pipe layer (201). The second air cooling port (102) is located between the first vibration buried pipe layer (201) and the second vibration buried pipe layer (202). The third air cooling port (103) is located between the second vibration buried pipe layer (202) and the third vibration buried pipe layer (203). The vibration buried pipe (2) is connected to a vibration device. A cooling medium is provided in the vibration buried pipe (2). The vibration device is connected to the vibration buried pipe (2) through an elastic connector.

2. The two-stage dense phase moving bed heat exchange device according to claim 1, characterized in that: The buried pipes (5) are arranged in a staggered or sequential arrangement.

3. The two-stage dense phase moving bed heat exchange device according to claim 1, characterized in that: The buried tube (5) is a finned tube or a nail head tube with an extended heating surface.

4. The two-stage dense phase moving bed heat exchange device according to claim 1, characterized in that: The air distribution device (3) comprises a plurality of air distribution pipes arranged at intervals, each of which is provided with a wind cap, and the distance between two adjacent air distribution pipes is the diameter of one air distribution pipe.

5. The two-stage dense phase moving bed heat exchange device according to claim 1, characterized in that: The air cooling ports (1) include a plurality of air cooling ports, which are correspondingly arranged on the side walls on both sides of the upper section of the moving bed heat exchange device.

6. The two-stage dense phase moving bed heat exchange device according to claim 5, characterized in that: The blowing angle of the air cooling port (1) is set obliquely downward, with an angle of 30° with the horizontal direction.

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