A solid particle heat storage device integrating heat storage and exchange

Abstract

The present invention relates to the technical field of heat storage equipment, and specifically to a solid particle heat storage device integrating heat storage and exchange, comprising an insulating cylinder, a material holding cylinder, a solid heat exchange tube, a recovery tube and a separation device. The material holding cylinder is coaxial with the insulating cylinder and is located inside the insulating cylinder, and the material holding cylinder is filled with solid particles. The solid heat exchange tube is arranged in the material holding cylinder. A turbofan is arranged in the recovery tube, and a separation device is installed on the material holding cylinder. In the solid particle heat storage device integrating heat storage and exchange of the present invention, by arranging an insulating cylinder, a material holding cylinder, a solid heat exchange tube and a separation device, the solid particles continuously circulate during the process of heat storage or heat exchange, so that the solid particles can fully contact with the solid heat exchange tube, thereby improving the heat exchange efficiency between the solid particles and the solid heat exchange tube, and making the temperature of the solid particles more uniform.

Description

Technical Field

[0001] The present invention relates to the technical field of heat storage equipment, and in particular to a solid particle heat storage equipment integrating heat storage and exchange. Background Art

[0002] Heat storage equipment is a device that can store heat and release it when the user needs it. Traditional heat storage equipment mainly includes molten salt heat storage equipment, solid heat storage equipment and phase change heat storage equipment. However, they each have a series of problems.

[0003] In traditional molten salt heat storage equipment, since all places where molten salt flows need to be equipped with electric heating devices to ensure that the local temperature is not lower than the solidification point of the molten salt, the molten salt heat storage equipment itself consumes a lot of electricity. Moreover, molten salt equipment is also prone to solidification of molten salt, which leads to relatively high operation and maintenance costs. For solid refractory brick heat storage equipment, first of all, the thermal conductivity of refractory bricks is low. Even if a large number of dispersed electric heating rods are used to heat refractory bricks, the temperature distribution is still not uniform enough, and the refractory bricks will break after long-term use. In addition, the equipment uses air as the heat transfer medium, but the energy contained in air per unit volume is low, which makes the heat exchange ventilation system occupy a large area and consumes a lot of energy. In phase change heat storage and steam production equipment, the phase change material changes from liquid to solid during the heat release process. When the phase change material solidifies, the heat transfer performance of the system will deteriorate sharply. In order to obtain sufficient heat release power, either the heat exchange area must be increased or the thermal conductivity of the phase change material must be increased. However, after adding a formulation to improve thermal conductivity to the phase change material, there has always been a problem of increasing the precipitation of the thermally conductive component.

[0004] In order to solve the above problems, new heat storage equipment began to use solid granular heat storage materials. Solid particle heat storage is actually a sensible heat storage technology. The principle is the same as molten salt heat storage. It uses energy sources to heat low-temperature particles to increase the temperature and convert energy into high-temperature particle sensible heat storage. When energy needs to be released, the stored high-temperature particles are exchanged with the heat medium to release the stored energy. The heat exchange effect is good, and the heat exchange tubes are directly buried in the heat storage material. The structure is compact and occupies a small area. When the system releases heat, the heat exchange medium directly exchanges heat with the heat storage material.

[0005] However, compared with other fluid media, solid particles have poor heat transfer and fluidity, and are relatively difficult to transport. Therefore, a multi-stage fluidized bed particle heat exchanger is currently used. Multiple chambers are set in the heat exchanger, and heat exchange tubes are arranged in each chamber. The heat exchange tubes are filled with working fluids. When storing heat, they are heat source working fluids, and when releasing heat, they are heat using working fluids. The particles outside the tubes are fluidized under the action of fluidizing wind and exchange heat with the working fluid inside the tubes. However, during use, since the heat exchange tubes cannot fill all the space, and the contact area between the solid particles and the heat exchange tubes is small, the thermal conductivity is low, and there will be inconsistent temperatures in different areas. When the wind carries the solid particles, the solid particles will collide with the heat exchange tubes, causing the heat exchange tubes to wear and affect the service life of the heat exchange tubes. Summary of the invention

[0006] The present invention provides a solid particle heat storage device integrating heat storage and heat exchange, so as to solve the problem that the existing heat storage device has low heat conduction efficiency and when wind carries solid particles, the solid particles will collide with heat exchange tubes, thus affecting the service life of the heat exchange tubes.

[0007] A heat storage and exchange integrated solid particle heat storage device of the present invention adopts the following technical scheme: a heat storage and exchange integrated solid particle heat storage device, comprising an insulation cylinder, a material holding cylinder, a solid heat exchange tube, a recovery tube and a separation device; the insulation cylinder is arranged along a first direction, the first direction is a vertical direction, the material holding cylinder is arranged along the first direction, is coaxial with the insulation cylinder and is located in the insulation cylinder, the material holding cylinder is filled with solid particles, the solid heat exchange tube is arranged in the material holding cylinder and both ends thereof extend out of the insulation cylinder, and the solid heat exchange tube is wrapped by the solid particles; a mixing space is defined between the insulation cylinder and the material holding cylinder, the mixing space has a head end and a tail end, the head end is located below the tail end; the head end and the tail end of the mixing space are respectively connected to The upper and lower ends of the material barrel are connected, and solid particles can enter the head end of the mixing space from the material barrel; the recovery pipe is arranged along the first direction, is coaxial with the insulation barrel and is located in the material barrel, the head end and the tail end of the mixing space are respectively connected with the upper and lower ends of the recovery pipe, and a turbo fan is arranged in the recovery pipe, and the turbo fan is located at the head end of the mixing space, so that the solid particles and wind can be mixed at the head end of the mixing space and move in the mixing space; the separation device is installed on the material barrel and is located at the tail end of the mixing space, and the separation device can separate the solid particles and wind at the tail end of the mixing space, and make the solid particles fall into the material barrel from the upper end of the material barrel, and make the wind enter the recovery pipe from the upper end of the recovery pipe.

[0008] Furthermore, the separation device includes a separation cylinder, a central tube and a plurality of cyclone plates; the separation cylinder and the central tube are both arranged along a first direction and are coaxial with the insulation cylinder; the recovery tube, the central tube, the separation cylinder and the material holding cylinder are arranged in sequence along a second direction, and the central tube is located on the side of the separation cylinder close to the vertical central axis of the insulation cylinder in the second direction, and the second direction is the radial direction of the insulation cylinder; the separation cylinder is fixedly connected to the material holding cylinder and is located above the solid heat exchange tube; the central tube is fixedly connected to the insulation cylinder; the recovery tube extends into the central tube so that the wind can return from the central tube to the recovery tube; a plurality of cyclone plates are arranged at the upper end of the material holding cylinder and are all arc-shaped plates, and the upper end of the cyclone plate abuts against the inner top wall of the insulation cylinder; a plurality of cyclone plates are evenly distributed on the material holding cylinder around the first direction, and the cyclone plate has an inner end and an outer end, the inner end is located on the side of the outer end close to the vertical central axis of the insulation cylinder in the second direction, and the inner end of the cyclone plate is connected to the upper end of the separation cylinder.

[0009] Furthermore, the separation cylinder includes an upper cylinder and a lower cylinder, which are arranged in sequence along the first direction, and the upper cylinder is located at the upper end of the lower cylinder and fixedly connected to the lower cylinder. The upper cylinder is a cylindrical structure, and the lower cylinder is a conical structure with a larger upper end and a smaller lower end.

[0010] Furthermore, a feeding port is provided at the lower end of the material containing barrel, and the feeding port is communicated with the mixing space.

[0011] Furthermore, a material discharge plate is coaxially arranged at the lower end of the material containing barrel, and the material discharge plate includes a plurality of plate bodies, all of which are arc-shaped, and all of which have a first end and a second end, and the first end is located on a side of the second end close to the vertical center axis of the insulation barrel in the second direction; the second direction is the radial direction of the insulation barrel; the first ends of the plurality of plate bodies are evenly distributed and fixedly connected around the first direction, and the second ends of the plurality of plate bodies are evenly distributed and fixedly connected around the first direction; the material discharge port is defined by every two plate bodies adjacently arranged around the first direction, and there are multiple material discharge ports.

[0012] Further, the blanking plate is rotatably arranged around a first direction.

[0013] Furthermore, a receiving plate is connected to the lower part of the unloading plate via a connecting rod, the connecting rod is arranged along a first direction, the turbofan includes a rotating shaft and turbine blades fixedly connected to the rotating shaft, the rotating shaft is arranged along the first direction and can rotate around its own axis; the rotating shaft passes through the receiving plate and the unloading plate in sequence along the first direction, and extends into the recovery pipe; a driving wheel is coaxially and fixedly connected to the rotating shaft, a driven wheel is rotatably arranged on the insulation cylinder, a gear ring is arranged on the receiving plate, and the driven wheel is meshed with the driving wheel and the gear ring at the same time.

[0014] Furthermore, a plurality of stoppers are arranged at the upper end of each plate body, and the plurality of stoppers are arranged in sequence on the plate body along the arc extension direction of the plate body.

[0015] Furthermore, the solid heat exchange tube includes a plurality of first tube bodies, which are arranged in sequence along a first direction in the material containing barrel, each first tube body is a vortex structure parallel to the first direction, and two first tube bodies adjacent to each other along the first direction are connected by a connecting tube; one end of the two first tube bodies at both ends in the first direction extends out of the insulation tube.

[0016] Furthermore, a gas heat exchange pipe is arranged in the recovery pipe, and both ends of the gas heat exchange pipe extend out of the heat insulation tube.

[0017] The beneficial effects of the present invention are as follows: a heat storage and heat exchange integrated solid particle heat storage device of the present invention is provided with an insulating cylinder, a material holding cylinder, a solid heat exchange tube and a separation device. In the process of heat storage or heat exchange, the solid particles are directly in contact with the solid heat exchange tube, and the solid particles are piled together in an aggregated state, which prolongs the contact time between the solid particles and the solid heat exchange tube, and realizes rapid heat conduction. The solid particles in the material holding cylinder will enter the head end of the mixing space, mix with the wind generated by the turbofan at the head end of the mixing space, and move in the mixing space under the promotion of the turbofan. In this process, the wind can fully mix the solid particles, improve the uniformity of the temperature of the solid particles, and by mixing the solid particles and the wind in the mixing space, the direct collision between the solid particles and the solid heat exchange tube is avoided, causing damage to the solid heat exchange tube. The mixed wind and solid particles will come to the tail end of the mixing space, and will be separated under the action of the separation device. The wind will enter the recovery pipe, and the solid particles will return to the material holding cylinder. During the entire mixing process, the solid particles continuously circulate in the material holding barrel and the mixing space, so that the solid particles can fully contact the solid heat exchange tubes, thereby improving the heat exchange efficiency between the solid particles and the solid heat exchange tubes and making the temperature of the solid particles more uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the overall structure of an embodiment of a solid particle heat storage device integrating heat storage and exchange according to the present invention;

[0020] Figure 2 A cross-sectional view of the overall structure of an embodiment of a solid particle heat storage device integrating heat storage and exchange according to the present invention;

[0021] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0022] Figure 4 for Figure 2 The enlarged view of point B in the middle;

[0023] Figure 5 A schematic diagram of the internal structure of an embodiment of a solid particle heat storage device integrating heat storage and exchange according to the present invention;

[0024] Figure 6 A cross-sectional view of a partial structure of an embodiment of a solid particle heat storage device integrating heat storage and exchange according to the present invention;

[0025] Figure 7 This is a schematic structural diagram of an embodiment of a solid particle heat storage device integrating heat storage and exchange according to the present invention, with the heat insulation cylinder removed.

[0026] In the figure: 100, insulation cylinder; 110, insulation layer; 200, material holding cylinder; 210, discharge plate; 220, discharge port; 230, receiving plate; 240, stopper; 300, solid heat exchange tube; 310, first tube body; 400, solid particles; 500, recovery tube; 510, turbofan; 511, rotating shaft; 512, turbine blades; 513, driving wheel; 514, driven wheel; 515, gear ring; 520, gas heat exchange tube; 600, separation cylinder; 700, center tube; 800, cyclone plate. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] An embodiment of a solid particle heat storage device integrating heat storage and exchange of the present invention is as follows: Figures 1 to 7 shown.

[0029] A solid particle heat storage device with integrated heat storage and exchange, comprising an insulation barrel 100, a material barrel 200, a solid heat exchange tube 300, a recovery tube 500 and a separation device. The insulation barrel 100 is arranged along a first direction, the first direction is a vertical direction, and the insulation barrel 100 is coated with an insulation layer 110. The material barrel 200 is arranged along the first direction, coaxial with the insulation barrel 100 and located inside the insulation barrel 100, the material barrel 200 is filled with solid particles 400, the solid heat exchange tube 300 is arranged in the material barrel 200 and both ends thereof extend out of the insulation barrel 100, and the solid particles 400 wrap the solid heat exchange tube 300.

[0030] A mixing space is defined between the insulating cylinder 100 and the material holding cylinder 200, and the mixing space has a head end and a tail end, and the head end is located below the tail end. The head end and the tail end of the mixing space are respectively connected to the upper and lower ends of the material holding cylinder 200, and the solid particles 400 can enter the head end of the mixing space from the material holding cylinder 200. The recovery pipe 500 is arranged along the first direction, coaxial with the insulating cylinder 100 and located in the material holding cylinder 200, and the head end and the tail end of the mixing space are respectively connected to the upper and lower ends of the recovery pipe 500. A turbo fan 510 is arranged in the recovery pipe 500, and the turbo fan 510 is located at the head end of the mixing space, so that the solid particles 400 and the wind can be mixed at the head end of the mixing space and move in the mixing space. The separation device is installed on the material barrel 200 and is located at the tail end of the mixing space. The separation device can separate the solid particles 400 and the wind at the tail end of the mixing space, and make the solid particles 400 fall into the material barrel 200 from the upper end of the material barrel 200, and make the wind enter the recovery pipe 500 from the upper end of the recovery pipe 500.

[0031] This embodiment is provided with an insulating cylinder 100, a material holding cylinder 200, a solid heat exchange tube 300 and a separation device. When in use, when heat needs to be stored in the solid particles 400, a heat source medium is provided from one end of the solid heat exchange tube 300 to the solid heat exchange tube 300 to heat the solid particles 400. When heat needs to be exchanged out of the solid particles 400, a heat source medium is provided from one end of the solid heat exchange tube 300 to the solid heat exchange tube 300 to cool the solid particles 400. In the process of heat storage or heat exchange, the solid particles 400 are directly in contact with the solid heat exchange tube 300, and the solid particles 400 are piled together in an aggregated state, which prolongs the contact time between the solid particles 400 and the solid heat exchange tube 300 and realizes rapid heat conduction.

[0032] The solid particles 400 in the material holding barrel 200 will enter the head end of the mixing space, mix with the wind generated by the turbofan 510 at the head end of the mixing space, and move in the mixing space under the stimulation of the turbofan 510. In this process, the wind can fully mix the solid particles 400, improve the uniformity of the temperature of the solid particles 400, and by mixing the solid particles 400 and the wind in the mixing space, direct collision between the solid particles 400 and the solid heat exchange tube 300 is avoided, which may cause damage to the solid heat exchange tube 300.

[0033] The mixed wind and solid particles 400 will come to the tail end of the mixing space, and will be separated under the action of the separation device, the wind will enter the recovery pipe 500, and the solid particles 400 will return to the material barrel 200. That is, the solid particles 400 can fall into the mixing space from the lower end of the material barrel 200, move from bottom to top in the mixing space, and return to the material barrel 200 from the upper end of the material barrel 200 after passing through the separation device. The wind can enter the mixing space from the lower end of the recovery pipe 500, move from bottom to top in the mixing space, and return to the recovery pipe 500 from the upper end of the recovery pipe 500 after passing through the separation device.

[0034] During the entire mixing process, the solid particles 400 continuously circulate in the material holding barrel 200 and the mixing space, so that the solid particles 400 can fully contact the solid heat exchange tube 300, thereby improving the heat exchange efficiency between the solid particles 400 and the solid heat exchange tube 300 and making the temperature of the solid particles 400 more uniform.

[0035] In this embodiment, the separation device includes a separation cylinder 600, a central tube 700 and a plurality of cyclone plates 800. The separation cylinder 600 and the central tube 700 are both arranged along the first direction and are coaxial with the insulation cylinder 100. The recovery tube 500, the central tube 700, the separation cylinder 600 and the material holding cylinder 200 are arranged in sequence along the second direction, and the central tube 700 is located on the side of the separation cylinder 600 close to the vertical central axis of the insulation cylinder 100 in the second direction, and the second direction is the radial direction of the insulation cylinder 100. The separation cylinder 600 is fixedly connected to the material holding cylinder 200 and is located above the solid heat exchange tube 300. The central tube 700 is fixedly connected to the insulation cylinder 100. The lower end of the recovery tube 500 passes through the receiving plate 230 and the unloading plate 210 in sequence and is fixedly connected to the insulation cylinder 100. The lower end of the recovery tube 500 is provided with a plurality of through openings so that wind can enter the mixing space from the through openings. The upper end of the recovery pipe 500 extends into the central pipe 700, so that the wind can return from the central pipe 700 to the recovery pipe 500. Multiple cyclone plates 800 are arranged at the upper end of the material holding barrel 200 and are all arc-shaped plates. The upper end of the cyclone plate 800 abuts or is fixedly connected to the inner top wall of the insulation barrel 100, so that the cyclone plate 800 and the inner top wall of the insulation barrel 100 are relatively sealed. Multiple cyclone plates 800 are evenly distributed around the first direction on the material holding barrel 200. The cyclone plates 800 have an inner end and an outer end. The inner end is located on the side of the outer end close to the vertical center axis of the insulation barrel 100 in the second direction, and the inner end of the cyclone plate 800 is connected to the upper end of the separation barrel 600.

[0036] Specifically, the separation cylinder 600 includes an upper cylinder and a lower cylinder, which are arranged in sequence along the first direction, and the upper cylinder is located at the upper end of the lower cylinder and is fixedly connected to the lower cylinder. The upper cylinder and the lower cylinder are an integrally formed structure, the upper cylinder is a cylindrical structure, and the lower cylinder is a conical structure with a larger upper end and a smaller lower end.

[0037] In this embodiment, a cyclone separation system is formed by setting a separation barrel 600, a central tube 700 and a plurality of cyclone plates 800. When the solid particles 400 and wind arrive at the tail end of the mixing space, they will enter from between every two cyclone plates 800 adjacently arranged around the first direction and be in a rotating state, and then enter the separation barrel 600, and spirally rotate downward along the inner wall of the separation barrel 600. The solid particles 400 are thrown toward the inner wall of the separation barrel 600 under the action of centrifugal force, and return to the material holding barrel 200 under the action of gravity. The wind separated from the solid particles 400 will go upward from the central tube 700 and enter the recovery pipe 500, so as to separate the solid particles 400 and the wind, thereby realizing the circulation of the solid particles 400 and the wind.

[0038] In this embodiment, a discharge port 220 is provided at the lower end of the material holding barrel 200 . The discharge port 220 is communicated with the mixing space, so that the solid particles 400 can enter the mixing space through the discharge port 220 .

[0039] By opening the discharge port 220 , the solid particles 400 can enter the mixing space through the discharge port 220 , and are blown by the wind generated by the turbo fan 510 in the mixing space to move from bottom to top in the mixing space.

[0040] In this embodiment, a material discharge plate 210 is coaxially arranged at the lower end of the material holding barrel 200. The material discharge plate 210 includes a plurality of plate bodies, each of which is arc-shaped. Each of the plurality of plate bodies has a first end and a second end, and the first end is located on the side of the second end close to the vertical center axis of the heat insulation barrel 100 in the second direction. The first ends of the plurality of plate bodies are evenly distributed and fixedly connected around the first direction, and the second ends of the plurality of plate bodies are evenly distributed and fixedly connected around the first direction. The material discharge port 220 is defined by every two plate bodies adjacently arranged around the first direction, and there are a plurality of material discharge ports 220.

[0041] By providing the unloading plate 210 , when in use, the solid particles 400 can fall from between every two plates disposed adjacent to each other around the first direction, that is, fall from between the multiple unloading ports 220 .

[0042] In this embodiment, the blanking plate 210 is rotatably disposed about a first direction.

[0043] Specifically, the lower part of the unloading plate 210 is connected to the receiving plate 230 through a connecting rod, and the connecting rod is arranged along the first direction. The turbofan 510 includes a rotating shaft 511 and a turbine blade 512 fixed to the rotating shaft 511. The rotating shaft 511 is arranged along the first direction and can rotate around its own axis. The rotating shaft 511 passes through the receiving plate 230 and the unloading plate 210 in sequence along the first direction and extends into the recovery pipe 500. A driving wheel 513 is coaxially and fixedly connected to the rotating shaft 511, and a driven wheel 514 is rotatably arranged on the heat insulation cylinder 100. A gear ring 515 is arranged on the unloading plate 230, and the driven wheel 514 is meshed with the driving wheel 513 and the gear ring 515 at the same time, so that when the driving wheel 513 rotates, the gear ring 515 can be driven to rotate through the driven wheel 514, so that the unloading plate 230 can rotate and drive the unloading plate 210 to rotate.

[0044] More specifically, the rotating shaft 511 is driven by a motor so that the rotating shaft 511 can rotate around its own axis.

[0045] Furthermore, a plurality of stoppers 240 are disposed at the upper end of each plate body, and the plurality of stoppers 240 are sequentially disposed on the plate body along the arc extension direction of the plate body.

[0046] By setting the receiving plate 230 and cooperating it with the driving wheel 513, the driven wheel 514 and the gear ring 515 to form a planetary gear mechanism, when in use, the motor drives the unloading plate 210 to rotate through the rotating shaft 511, which can reduce the rotation speed of the unloading plate 210, and the solid particles 400 falling from the unloading port 220 on the receiving plate 230 will fall in the mixing space at intervals and move in the radial direction under the action of wind, so as to avoid the solid particles 400 falling too fast and accumulating on the receiving plate 230, thereby improving the uniformity of the falling of the solid particles 400. By setting the stopper 240, the solid particles 400 are scraped off in a rotary manner to avoid the solid particles 400 being stuck at the unloading port 220.

[0047] In this embodiment, the solid heat exchange tube 300 includes a plurality of first tube bodies 310, which are sequentially arranged along the first direction in the material holding barrel 200, each of which is a vortex structure parallel to the first direction, and two first tube bodies 310 adjacently arranged along the first direction are connected via a connecting pipe. One end of the two first tube bodies 310 at both ends in the first direction extends out of the heat insulation barrel 100.

[0048] Specifically, the first tube body 310 has an inner tube end and an outer tube end, the inner tube end spirally extends outward around the axis of the first direction to the outer tube end, and the inner tube end is located on the side of the outer tube end close to the spiral center of the first tube body 310. The inner tube ends of two first tube bodies 310 adjacently arranged along the first direction are connected through a connecting pipe. The outer tube ends of the two first tube bodies 310 at both ends in the first direction extend out of the insulation tube 100.

[0049] By providing a plurality of first tube bodies 310 of a spiral structure, the contact surface between the solid particles 400 and the solid heat exchange tube 300 can be further increased.

[0050] In the embodiment, a gas heat exchange pipe 520 is disposed in the recovery pipe 500 , and both ends of the gas heat exchange pipe 520 extend out of the insulation tube 100 .

[0051] By providing the gas heat exchange pipe 520 , after the wind returns to the recovery pipe 500 , the gas heat exchange pipe 520 can take away the heat in the wind, thereby improving the temperature uniformity of the solid particles 400 and further improving the heat storage or heat exchange efficiency of the solid particles 400 .

[0052] In combination with the above embodiments, the specific working process is as follows:

[0053] When in use, when heat needs to be stored in the solid particles 400, a heat source medium is provided from one end of the solid heat exchange tube 300 into the solid heat exchange tube 300 to heat the solid particles 400. When heat needs to be exchanged out of the solid particles 400, a heat source medium is provided from one end of the solid heat exchange tube 300 into the solid heat exchange tube 300 to cool the solid particles 400.

[0054] During heat exchange or heat storage, the motor is started to drive the turbofan 510 and the receiving plate 230 to rotate. The solid particles 400 will fall in the mixing space at intervals and move in the radial direction under the action of the wind, preventing the solid particles 400 from falling too quickly and accumulating on the receiving plate 230, thereby improving the uniformity of the falling of the solid particles 400.

[0055] After falling from the discharge port 220, the solid particles 400 in the material holding barrel 200 will enter the head end of the mixing space, be mixed with the wind generated by the turbofan 510 at the head end of the mixing space, and move in the mixing space under the stimulation of the turbofan 510. In this process, the wind can fully mix the solid particles 400, improve the uniformity of the temperature of the solid particles 400, and by mixing the solid particles 400 and the wind in the mixing space, direct collision between the solid particles 400 and the solid heat exchange tube 300 is avoided, which may cause damage to the solid heat exchange tube 300.

[0056] Then the wind will carry the solid particles 400 and move from bottom to top in the mixing space. During this process, the solid particles 400 do not conduct heat. When the solid particles 400 and the wind arrive at the tail end of the mixing space, they will enter from between every two cyclone plates 800 adjacently arranged around the first direction and be in a rotating state, and then enter the separation barrel 600, and spirally rotate downward along the inner wall of the separation barrel 600 in the separation barrel 600. The solid particles 400 are thrown toward the inner wall of the separation barrel 600 under the action of centrifugal force, and return to the material barrel 200 under the action of gravity. The wind separated from the solid particles 400 will go upward from the central tube 700 and enter the recovery tube 500, separating the solid particles 400 from the wind, and the solid particles 400 fall into the material barrel 200 from the upper end of the material barrel 200, so that the wind enters the recovery tube 500 from the upper end of the recovery tube 500, and circulates in this way.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A solid particle heat storage device integrating heat storage and heat exchange, characterized in that: The invention comprises an insulation cylinder, a material holding cylinder, a solid heat exchange tube, a recovery tube and a separation device; the insulation cylinder is arranged along a first direction, the first direction is a vertical direction, the material holding cylinder is arranged along the first direction, is coaxial with the insulation cylinder and is located in the insulation cylinder, the material holding cylinder is filled with solid particles, the solid heat exchange tube is arranged in the material holding cylinder and both ends thereof extend out of the insulation cylinder, and the solid particles wrap the solid heat exchange tube; a mixing space is defined between the insulation cylinder and the material holding cylinder, the mixing space has a head end and a tail end, the head end is located below the tail end; the head end and the tail end of the mixing space are respectively connected to the upper and lower ends of the material holding cylinder, and the solid particles can enter the material holding cylinder from the material holding cylinder into the head end of the mixing space; the recovery pipe is arranged along the first direction, is coaxial with the insulation barrel and is located in the material holding barrel, the head end and the tail end of the mixing space are respectively connected with the upper and lower ends of the recovery pipe, a turbo fan is arranged in the recovery pipe, and the turbo fan is located at the head end of the mixing space, so that the solid particles and wind can be mixed at the head end of the mixing space and move in the mixing space; the separation device is installed on the material holding barrel and is located at the tail end of the mixing space, the separation device can separate the solid particles and wind at the tail end of the mixing space, and make the solid particles fall into the material holding barrel from the upper end of the material holding barrel, and make the wind enter the recovery pipe from the upper end of the recovery pipe.

2. The solid particle heat storage device with integrated heat storage and exchange according to claim 1, characterized in that: The separation device includes a separation cylinder, a central tube and a plurality of cyclone plates; the separation cylinder and the central tube are both arranged along a first direction and are coaxial with the insulation cylinder; the recovery tube, the central tube, the separation cylinder and the material holding cylinder are arranged in sequence along a second direction, and the central tube is located on the side of the separation cylinder close to the vertical central axis of the insulation cylinder in the second direction, and the second direction is the radial direction of the insulation cylinder; the separation cylinder is fixedly connected to the material holding cylinder and is located above the solid heat exchange tube; the central tube is fixedly connected to the insulation cylinder; the recovery tube extends into the central tube so that the wind can return from the central tube to the recovery tube; a plurality of cyclone plates are arranged at the upper end of the material holding cylinder and are all arc-shaped plates, and the upper end of the cyclone plate abuts against the inner top wall of the insulation cylinder; a plurality of cyclone plates are evenly distributed on the material holding cylinder around the first direction, and the cyclone plate has an inner end and an outer end, the inner end is located on the side of the outer end close to the vertical central axis of the insulation cylinder in the second direction, and the inner end of the cyclone plate is connected to the upper end of the separation cylinder.

3. The solid particle heat storage device integrating heat storage and exchange according to claim 2, characterized in that: The separation cylinder includes an upper cylinder and a lower cylinder, which are arranged in sequence along the first direction, and the upper cylinder is located at the upper end of the lower cylinder and fixedly connected to the lower cylinder. The upper cylinder is a cylindrical structure, and the lower cylinder is a conical structure with a larger upper end and a smaller lower end.

4. The solid particle heat storage device integrating heat storage and exchange according to claim 1, characterized in that: A feeding port is arranged at the lower end of the material containing barrel, and the feeding port is communicated with the mixing space.

5. The solid particle heat storage device with integrated heat storage and exchange according to claim 4, characterized in that: A material discharge plate is coaxially arranged at the lower end of the material containing barrel, and the material discharge plate includes multiple plate bodies, all of which are arc-shaped, and all of which have a first end and a second end, and the first end is located on the side of the second end close to the vertical center axis of the insulation barrel in the second direction; the second direction is the radial direction of the insulation barrel; the first ends of the multiple plate bodies are evenly distributed and fixedly connected around the first direction, and the second ends of the multiple plate bodies are evenly distributed and fixedly connected around the first direction; the material discharge port is defined by every two plate bodies adjacently arranged around the first direction, and there are multiple material discharge ports.

6. The solid particle heat storage device integrating heat storage and exchange according to claim 5, characterized in that: The blanking plate is arranged to be rotatable about a first direction.

7. The solid particle heat storage device integrating heat storage and exchange according to claim 6, characterized in that: A receiving plate is connected to the lower part of the unloading plate through a connecting rod, and the connecting rod is arranged along a first direction. The turbofan includes a rotating shaft and turbine blades fixedly connected to the rotating shaft. The rotating shaft is arranged along the first direction and can rotate around its own axis; the rotating shaft passes through the receiving plate and the unloading plate in sequence along the first direction, and extends into the recovery pipe; a driving wheel is coaxially and fixedly connected to the rotating shaft, a driven wheel is rotatably arranged on the insulation cylinder, and a gear ring is arranged on the receiving plate, and the driven wheel is meshed with the driving wheel and the gear ring at the same time.

8. The solid particle heat storage device integrating heat storage and exchange according to claim 5, characterized in that: A plurality of stoppers are arranged at the upper end of each plate body, and the plurality of stoppers are arranged in sequence on the plate body along the arc extension direction of the plate body.

9. The solid particle heat storage device integrating heat storage and exchange according to claim 1, characterized in that: The solid heat exchange tube includes a plurality of first tube bodies, which are arranged in sequence along a first direction in a material containing tube, each first tube body is a vortex structure parallel to the first direction, and two first tube bodies adjacent to each other along the first direction are connected by a connecting tube; one end of the two first tube bodies at both ends in the first direction extends out of the insulation tube.

10. The solid particle heat storage device integrating heat storage and exchange according to claim 1, characterized in that: A gas heat exchange pipe is arranged in the recovery pipe, and both ends of the gas heat exchange pipe extend out of the heat insulation tube.

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