Vertical radial flow regenerator

Abstract

The utility model discloses a vertical radial flow regenerator which comprises a vertically arranged shell, a concentric cylinder is arranged in the shell in a hanging mode, the concentric cylinder and the shell are concentrically arranged, and the concentric cylinder comprises two cylinders which are spaced by a certain distance. The concentric cylinder divides the inner space of the shell into a sub-runner, a filling layer and a collecting channel which are sequentially arranged from outside to inside along the radial direction of the shell, and a buffer cavity communicated with the sub-runner is formed between the bottom of the concentric cylinder and the bottom of the shell; the filling layer is respectively and radially communicated with the branch flow channel and the collecting flow channel; the filling layer is filled with an energy storage medium for forming a bed layer and is provided with a packing seal which is positioned at the top of the energy storage medium and is used for preventing airflow short circuit after the energy storage medium settles; and a flow guide cone of which the diameter is gradually reduced along the axial direction is arranged in the branch flow channel or the flow collecting channel. According to the utility model, the bed resistance is smaller, the airflow distribution is more uniform, the space effective utilization rate and the energy storage performance are improved, and the large-scale development of the regenerator is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage equipment, in particular to a vertical radial flow cold accumulator. Background Art

[0002] With the growth of the world's population and the acceleration of industrialization, energy demand continues to rise. Energy storage technology can improve the balance of energy supply and demand, reduce the gap between peak and valley energy consumption, and enhance the country's ability to resist energy crises. Among the many energy storage technologies, cold storage technology has the advantages of large scale, low cost, long life, and cross-season storage. It is gradually becoming a leader in future energy storage, and its core equipment is the cold storage device.

[0003] The use of solid-phase packed beds for cold storage has the advantages of not being restricted by the operating temperature zone, being safe, environmentally friendly, and having low costs. For large-scale energy storage systems, vertical axial flow cold storage devices will have problems such as large system resistance and uneven flow field distribution; horizontal axial flow cold storage devices will have problems such as uneven flow field distribution, large floor space, and difficulty in filling, all of which have an adverse effect on the energy storage system, thereby affecting the round-trip efficiency of the energy storage system. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a vertical radial flow cold storage device, which can solve the problems of uneven flow field distribution in the cold storage device, large bed resistance and low effective space utilization in the prior art, thereby improving the performance of the cold storage device and ensuring high-quality and efficient operation of medium and large cold storage devices.

[0005] In order to solve the above technical problems, the technical solutions adopted by the present utility model are as follows.

[0006] A vertical radial flow cold storage device comprises a vertical shell, wherein a concentric cylinder is suspended inside the shell, the concentric cylinder is arranged concentrically with the shell, and the concentric cylinder comprises two concentric cylinders that are spaced apart; the concentric cylinder divides the inner space of the shell into a flow divider, a filling layer and a flow collector arranged in sequence from the outside to the inside along the radial direction of the shell; the filling layer is filled with an energy storage medium for forming a bed layer, and a packing seal is arranged on the top of the energy storage medium for preventing short circuit of the airflow after the energy storage medium settles;

[0007] The upper part of the concentric cylinder is two non-porous annular steel rings whose tops are connected to the top of the shell and whose bottoms are flush, and the stuffing seal is arranged between the two non-porous annular steel rings; the middle and lower part of the concentric cylinder is an outer annular grid whose top is connected to the bottoms of the two non-porous annular steel rings one by one, and is used to connect the filling layer with the shunt channel and the collecting channel respectively, and an inner annular grid located inside the outer annular grid, and the energy storage medium is filled between the outer annular grid and the inner annular grid; the bottom of the concentric cylinder is a circular non-porous steel plate connected to the bottom of the outer annular grid and the inner annular grid and spaced from the bottom of the shell to form a buffer cavity connected to the shunt channel between the bottom of the shell;

[0008] The flow branch channel or the flow collecting channel is provided with a guide cone whose axial diameter gradually decreases so as to keep the flow velocity of the energy storage and release gas flow from the axial direction to the radial direction through the filling layer consistent.

[0009] Preferably, wire mesh is wound inside the outer annular grille and the inner annular grille.

[0010] Preferably, the stuffing seal is filled with a stuffing medium made of the same material as the energy storage medium.

[0011] Preferably, a first heat exchange fluid inlet and outlet coaxially arranged with the shell and connected to the collecting channel is provided on the top of the shell; a second heat exchange fluid inlet and outlet coaxially arranged with the shell and connected to the buffer chamber is provided on the bottom of the shell.

[0012] Preferably, a metal compensator is provided on the inlet and outlet of the first heat exchange fluid for eliminating the temperature alternation stress generated during the energy storage and release cycle, and a flange is provided on the top of the metal compensator; the inlet and outlet of the second heat exchange fluid is connected to a heat exchange fluid pipeline, and an ash removal port is provided on the heat exchange fluid pipeline.

[0013] Preferably, the top of the shell is provided with a first packing port and a packing seal heat exchange fluid inlet and a second packing port and a packing seal heat exchange fluid outlet which are connected with the inside of the packing seal.

[0014] Preferably, the shell comprises a shell outer wall and a shell inner wall, and an insulation layer is arranged between the shell outer wall and the shell inner wall for preventing energy from being lost through the shell during the heat exchange process.

[0015] Preferably, the concentric cylinder is suspended in the inner wall of the shell by means of a load-bearing channel steel.

[0016] Due to the adoption of the above technical scheme, the technical progress achieved by the present invention is as follows.

[0017] The utility model can reduce bed resistance and improve effective space utilization by arranging concentric cylinders; the utility model can make the flow velocity of the energy storage and release airflow from axial to radial direction through the filling layer consistent by arranging the outer annular grid, the inner annular grid and the guide cone, and can effectively reduce the problem of uneven flow field distribution. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the utility model.

[0019] Wherein: 1. Shell, 101. Shell outer wall, 102. Shell inner wall, 2. Concentric cylinder, 201. Holeless annular steel ring, 202. Outer annular grille, 203. Inner annular grille, 3. Insulation layer, 4. Diverter, 5. Filling layer, 6. Collector, 7. Load-bearing channel steel, 8. Packing seal, 9. First packing port and packing seal heat exchange fluid inlet, 10. Metal compensator, 11. Flange, 12. First heat exchange fluid inlet and outlet, 13. Second packing port and packing seal heat exchange fluid outlet, 14. Guide cone, 15. Energy storage medium, 16. Second heat exchange fluid inlet and outlet, 17. Support foot. DETAILED DESCRIPTION

[0020] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0021] A vertical radial flow cold storage device, combined with Figure 1 As shown, it includes a vertical shell 1, and a concentric cylinder 2 which is concentrically arranged with the shell 1 is suspended inside the shell 1. The concentric cylinder 2 includes two concentric cylinders with a certain distance between them, and the concentric cylinder 2 divides the internal space of the shell 1 radially into a shunt channel 4, a filling layer 5 and a collecting channel 6 which are arranged in sequence from the outside to the inside of the shell 1, wherein the filling layer 5 is filled with an energy storage medium 15, and the energy storage medium 15 and the filling layer 5 form a bed layer, and at the same time, the filling layer 5 is radially ventilated through the concentric cylinder 2 and the shunt channel 4 and the collecting channel 6, respectively, and has the characteristics of a large windward surface, a small bed resistance, a bed space volume that accounts for more than 50% of the equipment volume, and a high effective space utilization rate, so it is advantageous to apply a vertical radial flow cold storage device to medium and large energy storage projects.

[0022] Specifically, the energy storage medium 15 is solid particles, such as rain flower stone, glass, basalt, concrete, granite, sodium chloride, dolomite, etc., or capsule particles encapsulated by phase change materials. In order to prevent the short circuit of the airflow after the energy storage medium 15 settles, a certain packing seal 8 is arranged on the upper part of the concentric cylinder 2, and the packing seal 8 is filled with a packing medium, and the packing medium and the energy storage medium 15 are made of the same material; the top of the shell 1 is provided with a first packing port and a packing seal heat exchange fluid inlet 9 and a second packing port and a packing seal heat exchange fluid outlet 13, and the first packing port and the packing seal heat exchange fluid inlet 9 and the second packing port and the packing seal heat exchange fluid outlet 13 are all connected to the inside of the packing seal 8. Since the setting of the packing seal 8 may form a local "dead cavity", the temperature of the "dead cavity" can be quickly adjusted to be consistent with the temperature of the energy storage medium 15 in the packing layer 5 through the first packing port and the packing seal heat exchange fluid inlet 9 and the second packing port and the packing seal heat exchange fluid outlet 13, thereby weakening the adverse effects of the heat exchange process and the dynamic characteristics of the energy storage and energy release interval on the temperature field inside the packing layer 5.

[0023] The upper part of the concentric cylinder 2 is two hole-free annular steel rings 201 , the tops of the two hole-free annular steel rings 201 are connected to the top of the shell 1 , and the bottoms of the two hole-free annular steel rings 201 are flush, and the stuffing seal 8 is arranged between the two hole-free annular steel rings 201 . The middle and lower parts of the concentric cylinder 2 are an outer annular grille 202 and an inner annular grille 203 located inside the outer annular grille 202. The tops of the outer annular grille 202 and the inner annular grille 203 are connected one-to-one with the bottoms of the two hole-free annular steel rings 201. The outer annular grille 202 and the inner annular grille 203 are used to connect the filling layer 5 with the branch channel 4 and the collecting channel 6 respectively, so as to realize radial ventilation of the filling layer 5 with the branch channel 4 and the collecting channel 6 respectively. At the same time, the grilles of the outer annular grille 202 and the inner annular grille 203 are both wrapped with wire mesh, and the wire mesh and the outer annular grille 202 and the inner annular grille 203 are all made of metal materials; the energy storage medium 15 is located at the lower part of the stuffing seal 8 and is filled between the outer annular grille 202 and the inner annular grille 203. The bottom of the concentric cylinder 2 is a circular non-porous steel plate, which can be convex or flat. The circular non-porous steel plate is connected to the bottom of the outer annular grille 202 and the inner annular grille 203. The circular non-porous steel plate is spaced apart from the bottom of the shell 1, thereby forming a buffer cavity between the bottom of the shell 1, and the buffer cavity is connected to the diversion channel 4.

[0024] The top of the shell 1 is provided with a first heat exchange fluid inlet and outlet 12, which is coaxially arranged with the shell 1. A metal compensator 10 is arranged on the first heat exchange fluid inlet and outlet 12, which is used to eliminate the temperature alternating stress generated during the energy storage and release cycle. A flange 11 is arranged on the top of the metal compensator 10 for maintenance. The bottom of the shell 1 is provided with a second heat exchange fluid inlet and outlet 16, which is coaxially arranged with the shell 1. The second heat exchange fluid inlet and outlet 16 is connected to a heat exchange fluid pipeline, and an ash removal port is arranged on the heat exchange fluid pipeline.

[0025] The collecting channel 6 is connected to the first heat exchange fluid inlet and outlet 12 at the top of the shell 1 as a channel for the heat exchange fluid; the branching channel 4 is connected to the second heat exchange fluid inlet and outlet 16 at the bottom of the shell 1 through the buffer chamber as a channel for the heat exchange fluid. A guide cone 14 is provided in the collecting channel 6 or the branching channel 4, and the diameter of the guide cone 14 gradually decreases along the axial direction, so that the flow velocity of the energy storage and release airflow from the axial direction to the radial direction through the filling layer 5 remains consistent, which can effectively reduce the problem of uneven flow field distribution.

[0026] The shell 1 includes a shell outer wall 101 and a shell inner wall 102, and the shell outer wall 101 and the shell inner wall 102 are made of metal materials with low thermal conductivity and high strength. An insulating layer 3 is arranged between the shell outer wall 101 and the shell inner wall 102, and the insulating layer 3 is one of polyurethane foam layer, glass fiber layer, foam glass layer, aerogel glass fiber felt layer, nitrile rubber and diene foam layer, aluminum foil glass fiber cloth layer, expanded perlite layer, vacuum layer or other insulating materials. The setting of the insulating layer 3 can effectively prevent energy loss through the shell 1 during the heat exchange process.

[0027] A load-bearing channel steel 7 is provided between the shell 1 and the concentric cylinder 2, and the load-bearing channel steel 7 is used to suspend the concentric cylinder 2 in the shell inner wall 102. A support foot 17 is provided at the bottom of the shell 1, and the shell outer wall 101 and the shell inner wall 102 are supported by the support foot 17; or the shell inner wall 102 is cushioned on the shell outer wall 101, and the shell outer wall 101 is supported by the support foot 17.

[0028] When in use, the utility model can be used as a cold storage device or a heat storage device. Through the arrangement of the concentric cylinder 2, the outer annular grille 202, the inner annular grille 203 and the guide cone 14, the bed resistance can be reduced and the airflow distribution is more uniform, thereby improving the effective utilization rate of space and the energy storage characteristics, which is conducive to the large-scale development of heat and cold storage.

[0029] When used as a heat storage device, it can perform heat storage and heat release cycles; when used as a cold storage device, it can perform cold storage and cold release cycles. The following takes the cold storage and cold release process as an example for specific description.

[0030] During the cold storage process, the low-temperature heat exchange fluid enters the cold storage device through the second heat exchange fluid inlet and outlet 16, enters the flow divider 4 through the buffer chamber at the bottom of the shell 1, and directly contacts and exchanges heat with the energy storage medium 15 through the outer annular grid 202. The fluid after heat exchange flows into the collecting channel 6 from the inner annular grid 203, and after being pressure-equalized by the guide cone 14, it flows out of the shell 1 through the first heat exchange fluid inlet and outlet 12. When the outlet fluid temperature reaches the cut-off temperature, the low-temperature heat exchange fluid is switched to the next cold storage device, and at the same time, a low-temperature fluid is introduced into the first filling port and the filling seal heat exchange fluid inlet 9 to exchange heat with the filling medium in the filling seal 8 until the temperature of the fluid at the second filling port and the filling seal heat exchange fluid outlet 13 reaches the cold storage cut-off temperature, and then the regulating valves of the first heat exchange fluid inlet and outlet 12 and the second heat exchange fluid inlet and outlet 16 are closed, and the cold storage process of this cold storage device ends.

[0031] During the cold release process, the normal temperature heat exchange fluid enters the cold storage device through the first heat exchange fluid inlet and outlet 12, and after being pressure-equalized through the collector 6 and the guide cone 14, it flows into the filling layer 5 through the inner annular grid 203, and directly exchanges heat with the energy storage medium 15. The cooled heat exchange fluid passes through the outer annular grid 202, and successively passes through the branch channel 4 and the buffer cavity at the bottom of the shell 1, and flows out of the cold storage device through the second heat exchange fluid inlet and outlet 16. When the outlet fluid temperature reaches the cut-off temperature, the normal temperature heat exchange fluid is switched to the next cold storage device, and at the same time, a normal temperature fluid is introduced into the first filling port and the filling seal heat exchange fluid inlet 9, and heat is exchanged with the filling medium in the filling seal 8 until the temperature of the fluid at the second filling port and the filling seal heat exchange fluid outlet 13 reaches the cold release cut-off temperature, and then the regulating valves of the first heat exchange fluid inlet and outlet 12 and the second heat exchange fluid inlet and outlet 16 are closed, and the cold release process of this cold storage device ends.

[0032] The difference between the heat storage and heat release process and the cold storage and cold release process is that the heat exchange fluid flows in the opposite direction, that is, in the heat storage process, the high-temperature heat exchange fluid enters the heat accumulator from the first heat exchange fluid inlet and outlet 12 at the top, and flows out of the heat accumulator from the second heat exchange fluid inlet and outlet 16 at the bottom. In the heat release process, the normal-temperature heat exchange fluid flows into the heat accumulator from the second heat exchange fluid inlet and outlet 16 at the bottom, and flows out of the heat accumulator from the first heat exchange fluid inlet and outlet 12 at the top.

Claims

1. A vertical radial flow cold storage device, comprising a vertical housing (1), characterized in that: A concentric cylinder (2) is suspended inside the shell (1), the concentric cylinder (2) is arranged concentrically with the shell (1), and the concentric cylinder (2) comprises two concentric cylinders that are spaced apart from each other; the concentric cylinder (2) divides the internal space of the shell (1) into a flow branch channel (4), a filling layer (5) and a flow collecting channel (6) arranged in sequence from the outside to the inside along the radial direction of the shell (1); the filling layer (5) is filled with an energy storage medium (15) for forming a bed layer, and a packing seal (8) is provided at the top of the energy storage medium (15) for preventing short circuit of the airflow after the energy storage medium (15) settles; The upper part of the concentric cylinder (2) is composed of two non-porous annular steel rings (201) whose tops are connected to the top of the shell (1) and whose bottoms are flush, and the stuffing seal (8) is arranged between the two non-porous annular steel rings (201); the middle and lower part of the concentric cylinder (2) is composed of an outer annular grille (202) whose top is connected to the bottoms of the two non-porous annular steel rings (201) in a one-to-one correspondence and is used to connect the filling layer (5) with the branch channel (4) and the collecting channel (6) respectively, and an inner annular grille (203) located inside the outer annular grille (202), and the energy storage medium (15) is filled between the outer annular grille (202) and the inner annular grille (203); the bottom of the concentric cylinder (2) is a circular non-porous steel plate connected to the bottoms of the outer annular grille (202) and the inner annular grille (203) and spaced from the bottom of the shell (1) to form a buffer cavity connected to the branch channel (4) between the bottom of the shell (1); The flow branching channel (4) or the flow collecting channel (6) is provided with a flow guide cone (14) whose diameter gradually decreases in the axial direction so as to keep the flow velocity of the energy storage and release gas flow from the axial direction to the radial direction through the filling layer (5) consistent.

2. A vertical radial flow regenerator according to claim 1, characterized in that: The outer annular grille (202) and the inner annular grille (203) are both wound with wire mesh inside the grilles.

3. A vertical radial flow regenerator according to claim 1, characterized in that: The stuffing seal (8) is filled with a stuffing medium made of the same material as the energy storage medium (15).

4. A vertical radial flow regenerator according to claim 1, characterized in that: The top of the shell (1) is provided with a first heat exchange fluid inlet and outlet (12) which is coaxially arranged with the shell (1) and communicated with the collecting channel (6); the bottom of the shell (1) is provided with a second heat exchange fluid inlet and outlet (16) which is coaxially arranged with the shell (1) and communicated with the buffer chamber.

5. A vertical radial flow regenerator according to claim 4, characterized in that: The first heat exchange fluid inlet and outlet (12) is provided with a metal compensator (10) for eliminating the temperature alternating stress generated during the energy storage and release cycle, and a flange (11) is provided on the top of the metal compensator (10); the second heat exchange fluid inlet and outlet (16) is connected to a heat exchange fluid pipeline, and an ash removal port is provided on the heat exchange fluid pipeline.

6. A vertical radial flow regenerator according to claim 1, characterized in that: The top of the shell (1) is provided with a first packing port and a packing seal heat exchange fluid inlet (9) and a second packing port and a packing seal heat exchange fluid outlet (13) which are connected to the inside of the packing seal (8).

7. A vertical radial flow regenerator according to claim 1, characterized in that: The shell (1) comprises a shell outer wall (101) and a shell inner wall (102), and a heat insulating layer (3) is provided between the shell outer wall (101) and the shell inner wall (102) for preventing energy from being lost through the shell (1) during a heat exchange process.

8. A vertical radial flow regenerator according to claim 7, characterized in that: The concentric cylinder (2) is suspended in the inner wall (102) of the shell body through the load-bearing channel steel (7).

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