Composite ceramic packed bed heat storage tank
By using a composite ceramic packed bed structure and a spiral guide plate design, the problems of unstable thermal stratification and low heat exchange efficiency in traditional heat storage tanks are solved, achieving stable temperature stratification and efficient heat exchange, while improving mechanical strength and heat exchange time.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-24
- Publication Date
- 2026-04-14
AI Technical Summary
Traditional heat storage tanks suffer from unstable heat stratification, low heat exchange efficiency, complex structure, difficulty in achieving efficient heat transfer with a single filling layer, easy mixing of hot and cold fluids, unreasonable flow guiding structure design, inability to extend heat exchange time, and difficulty in balancing the thermal conductivity and mechanical strength of the filling material.
The composite ceramic packed bed structure includes an upper porous media filling layer, a porous partition, and a lower porous media filling layer. It uses blast furnace slag-graphite composite particles, combined with a spiral guide plate and flow guiding components, to form a particle size gradient and pore size gradual change design, which suppresses the mixing of hot and cold fluids, extends the heat exchange path, and enhances heat exchange efficiency.
Stable temperature stratification was achieved, heat exchange efficiency was improved, mixing of hot and cold fluids was reduced, mechanical strength was enhanced, heat exchange time was extended, and the overall performance of the heat storage tank was improved.
Smart Images
Figure CN224121786U_ABST
Abstract
Description
Technical fields:
[0001] This utility model relates to the field of heat storage tank technology, specifically to a composite ceramic packed bed heat storage tank. Background technology:
[0002] Currently, traditional thermal storage tanks generally suffer from problems such as unstable thermal stratification, low heat exchange efficiency, and complex structure. In existing technologies, a single-layer filling structure is difficult to achieve efficient heat transfer, and the mixing of hot and cold fluids can easily lead to the disruption of temperature gradients; some devices use flow guiding structures, but the path design is unreasonable and cannot sufficiently extend the heat exchange time; in addition, the filling materials are mostly of a single composition, making it difficult to balance thermal conductivity and mechanical strength. Utility Model Content:
[0003] Therefore, this utility model provides a composite ceramic packed bed heat storage tank to overcome the problems of the prior art.
[0004] This utility model is implemented by the following technical solution:
[0005] A composite ceramic packed bed thermal regenerator includes a tank body, with a high-temperature inlet and a low-temperature inlet and a low-temperature inlet and a high-temperature outlet at the top and bottom of the tank body, respectively. Inside the tank body, from top to bottom, are sequentially fixed an upper porous media filling layer, a porous baffle, and a lower porous media filling layer. Both the upper and lower porous media filling layers are composed of blast furnace slag-graphite composite particles. Flow guiding components are respectively installed between the high-temperature inlet and the upper porous media filling layer, and between the lower porous media filling layer and the low-temperature inlet and a low-temperature inlet and a high-temperature outlet, and these flow guiding components are fixed inside the tank body.
[0006] Preferably, the particle size of the filling particles in the upper porous medium filling layer is 1-2 mm, and the pore spacing is 0.4-0.6 mm; the particle size of the filling particles in the lower porous medium filling layer is 2-3 mm, and the pore spacing is 0.4-0.6 mm.
[0007] Preferably, the pore size of the porous partition is arranged in a gradient decreasing from top to bottom.
[0008] Preferably, the flow guiding assembly includes a spiral flow guiding plate, the flow guiding surface of the spiral flow guiding plate is inclined and the inclined direction is towards the central axis of the tank, and a plurality of flow guiding holes are evenly distributed on the spiral flow guiding plate.
[0009] Preferably, the high-temperature inlet and outlet and the low-temperature inlet and outlet are respectively composed of an input pipe and an output pipe, and both the input pipe and the output pipe are equipped with valves.
[0010] Preferably, the blast furnace slag-graphite composite particles are composed of the following raw materials by weight percentage: 70%–85% blast furnace slag, 10%–20% graphite, and 5% bentonite.
[0011] Preferably, the inclination angle of the spiral guide plate is 30°-60°.
[0012] Preferably, the inner wall of the tank is provided with a heat insulation layer, the thickness of which is 5-10mm.
[0013] The advantages of this utility model are: the tank body is equipped with upper and lower porous media filling layers and porous baffles. Through the particle size gradient distribution and the pore size gradual design of the porous baffles, the interlayer resistance difference is formed, which suppresses the mixing of hot and cold fluids and maintains a stable high temperature zone and low temperature zone. Furthermore, the flow guiding component and the multi-layer filling structure are integrated to maximize heat exchange in a limited space, while reducing fluid disturbance, reducing axial heat diffusion, and improving the overall performance of the heat storage tank. Attached image description:
[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0015] Figure 1 This is a schematic diagram of the structure described in this utility model;
[0016] Figure 2 This is a cross-sectional view of the structure described in this utility model.
[0017] In the diagram: 1. Tank body; 2. High temperature inlet / outlet; 3. Low temperature inlet / outlet; 4. Upper porous media filling layer; 5. Lower porous media filling layer; 6. Porous baffle; 7. Spiral guide plate. Detailed implementation method:
[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0019] like Figure 1 , Figure 2 As shown, a composite ceramic packed bed heat storage tank includes a tank body 1, with a high temperature inlet / outlet 2 and a low temperature inlet / outlet 3 at the top and bottom of the tank body 1, respectively. Inside the tank body 1, from top to bottom, there are an upper porous medium filling layer 4, a porous baffle 6 and a lower porous medium filling layer 5, which are fixedly arranged in sequence. The upper porous medium filling layer 4 and the lower porous medium filling layer 5 are made of blast furnace slag-graphite composite particles.
[0020] The upper porous media filling layer 4 is filled with particles with a particle size of 1-2 mm and a pore spacing of 0.4-0.6 mm. The lower porous media filling layer 5 is filled with particles with a particle size of 2-3 mm and a pore spacing of 0.4-0.6 mm. The pore size of the porous baffle 6 is progressively smaller from top to bottom. A flow guiding component is provided between the high temperature inlet / outlet 2 and the upper porous media filling layer 4, and between the lower porous media filling layer 5 and the low temperature inlet / outlet 3. The flow guiding component is fixed inside the tank body 1.
[0021] The flow guiding assembly includes a spiral guide plate 7. The flow guiding surface of the spiral guide plate 7 is inclined at an angle of 30°-60° and the inclined direction is towards the central axis of the tank 1, which can form a spiral flow guiding channel. Multiple flow guiding holes are fixed on the guide plate 7 in sequence.
[0022] The high-temperature inlet / outlet 2 and the low-temperature inlet / outlet 3 each include an input pipe and an output pipe, which are fixedly connected to the top and bottom of the tank body 1, respectively, and valves are fixedly installed on the input pipe and the output pipe.
[0023] Actual work process:
[0024] High-temperature fluid enters from the high-temperature inlet / outlet 2 at the top of tank 1, while low-temperature fluid flows out from the low-temperature inlet / outlet 3 at the bottom; stable temperature stratification is formed through the following mechanism:
[0025] The porous media filling layer accelerates heat transfer, and the spiral guide plate 7 guides the fluid to descend in a spiral, extending the heat exchange path.
[0026] Furthermore, the upper porous media filling layer 4 is filled with particles with a particle size of 1-2 mm and the lower porous media filling layer 5 is filled with particles with a particle size of 2-3 mm. In this way, the particle size gradient layer and the porous partition 6 inhibit the mixing of hot and cold fluids.
[0027] The guide holes of the high-temperature fluid spiral guide plate 7 are evenly distributed to form a spiral flow, increasing the contact area with the packing.
[0028] The upper porous medium filling layer 4, with its smaller particle size, provides a larger specific surface area, quickly absorbing heat from high-temperature fluids and forming a stable high-temperature zone;
[0029] The lower porous medium filling layer 5 has a larger particle size to reduce fluid disturbance, slow down the downward diffusion of heat, and maintain the low temperature zone;
[0030] The porous partition 6 features a gradually changing pore size design, creating a difference in interlayer resistance and preventing heat from the high-temperature zone from being directly conducted to the low-temperature zone.
[0031] The inclined angle of the spiral guide plate 7 causes the fluid to spiral down, forming a natural swirling flow, which enhances radial mixing and suppresses axial heat diffusion.
[0032] The porous media filling layer can use blast furnace slag (70%–85%) to provide a high-strength skeleton, graphite (10%–20%) to form a heat-conducting network, and bentonite (5%) to enhance particle adhesion.
[0033] The inner wall of tank 1 is provided with a heat insulation layer, the thickness of which is 5-10mm.
[0034] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A composite ceramic packed bed thermal regenerator, comprising a tank body (1), characterized in that: The tank (1) is provided with a high temperature inlet / outlet (2) and a low temperature inlet / outlet (3) at the top and bottom respectively; the tank (1) is provided with an upper porous medium filling layer (4), a porous partition (6) and a lower porous medium filling layer (5) in sequence from top to bottom; the upper porous medium filling layer (4) and the lower porous medium filling layer (5) are both made of blast furnace slag-graphite composite particles; flow guiding components are provided between the high temperature inlet / outlet (2) and the upper porous medium filling layer (4), and between the lower porous medium filling layer (5) and the low temperature inlet / outlet (3), and the flow guiding components are fixed inside the tank (1).
2. The composite ceramic packed bed thermal storage tank according to claim 1, characterized in that: The upper porous medium filling layer (4) has a particle size of 1-2 mm and a pore spacing of 0.4-0.6 mm; the lower porous medium filling layer (5) has a particle size of 2-3 mm and a pore spacing of 0.4-0.6 mm.
3. A composite ceramic packed bed thermal storage tank according to claim 2, characterized in that: The pore size of the porous partition (6) is set in a gradient decreasing from top to bottom.
4. A composite ceramic packed bed thermal storage tank according to claim 3, characterized in that: The flow guiding assembly includes a spiral flow guiding plate (7), the flow guiding surface of the spiral flow guiding plate (7) is inclined and the inclined direction is towards the central axis of the tank (1), and a plurality of flow guiding holes are evenly distributed on the spiral flow guiding plate (7).
5. A composite ceramic packed bed thermal storage tank according to claim 4, characterized in that: The high-temperature inlet / outlet (2) and the low-temperature inlet / outlet (3) are respectively composed of an input pipe and an output pipe, and valves are provided on both the input pipe and the output pipe.
6. A composite ceramic packed bed thermal storage tank according to claim 5, characterized in that: The inclination angle of the spiral guide plate (7) is 30°-60°.
7. A composite ceramic packed bed thermal regenerator according to any one of claims 1-6, characterized in that: The inner wall of the tank (1) is provided with a heat insulation layer, the thickness of which is 5-10mm.