A double cavity silo structure for calcium-based pellets

Abstract

The application provides a double-layer cavity storage structure for calcium-based particles, and belongs to the technical field of energy storage equipment, which comprises an outer shell and an inner shell, the inner shell is arranged in the inner cavity of the outer shell, the inner cavity of the inner shell is a high-temperature storage cavity, the space region between the inner shell and the outer shell is a medium-temperature storage heat preservation cavity, one end of the outer shell is provided with a first opening, the inner shell is provided with a second opening, the high-temperature storage cavity is connected with the outside through the second opening, and the medium-temperature storage heat preservation cavity is connected with the outside through the first opening. The storage structure completely solves the problems of mixed storage, working condition disorder and material cross interference of the existing calcium-based adsorbent storage particles, realizes the professional and partition storage of two kinds of core adsorbent particles, reduces the heat loss of the adsorbent storage stage from the source, significantly improves the heat energy utilization rate, and effectively reduces the operation energy consumption of the whole calcium cycle energy storage coupled carbon capture system.

Description

Technical Field

[0001] This invention relates to the field of energy storage equipment technology, and specifically to a double-layer cavity storage structure for calcium-based particles. Background Technology

[0002] Calcium cycle thermochemical energy storage coupled with carbon capture technology is one of the core technologies for large-scale and efficient energy storage and flue gas carbon emission reduction. It relies on the reversible cycle reaction of calcium oxide carbonation carbon capture and heat release, and calcium carbonate calcination decomposition carbon release and heat storage. It has significant advantages such as high energy storage density, low raw material cost, excellent cycle stability, and suitability for high-temperature industrial scenarios. It is a key development direction for new power energy storage and industrial low-carbon transformation.

[0003] In the intermittent operation of the entire system's energy storage / release-adsorption / desorption process, the high-temperature static storage of the calcium-based adsorbent is a crucial step in connecting the reactions and ensuring the system's efficient and continuous operation. The core reactions of the system have strict temperature thresholds: With smoke The carbonation trapping reaction requires a high-temperature environment above 500℃. and After the reaction, the product is generated The temperature is approximately 600℃. The decomposition and regeneration reaction requires a high temperature of 900℃, and the thermal decomposition... If the temperature of the particles reaches above 800℃, and the calcium-based particles after the reaction are not kept warm, the subsequent reaction efficiency, energy consumption cost and cycle performance will be affected if the adsorbent is cooled down and then heated again.

[0004] Currently, most existing calcium-based adsorbent storage silos in the industry adopt a single-cavity, homogeneous storage structure, which only has a simple particle storage function and has obvious technical defects. High temperature medium temperature The particles are stored uniformly in a single chamber. During static storage, heat is continuously dissipated to the outside through the chamber walls and the gaps between the particles, resulting in significant ineffective heat loss.

[0005] On the one hand, when the calcium oxide particles, after being cooled down, participate in the carbonation reaction again, a large amount of additional heat energy is required to reheat them to a reaction temperature above 500°C, which greatly increases the auxiliary heat energy consumption of the system and reduces the overall efficiency of the energy storage system. On the other hand, when the cooled calcium carbonate particles re-enter the calcination process, they need to be heated from a low temperature to a decomposition temperature of 900°C, which results in a large temperature difference and a significant increase in energy.

[0006] Therefore, we propose a double-layer cavity storage structure for calcium-based particles. Summary of the Invention

[0007] The purpose of this invention is to provide a double-layer cavity storage structure for calcium-based particles to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: This invention provides a double-layer cavity storage structure for calcium-based particles, comprising an outer shell and an inner shell. The inner shell is disposed within the cavity of the outer shell and serves as a high-temperature storage cavity. The space between the inner and outer shells serves as a medium-temperature storage and insulation cavity. One end of the outer shell has a first opening, and the inner shell has a second opening. The high-temperature storage cavity communicates with the outside through the second opening, and the medium-temperature storage and insulation cavity communicates with the outside through the first opening.

[0009] Furthermore, the high-temperature storage chamber stores... Particles.

[0010] Furthermore, the medium-temperature storage and insulation cavity stores... Particles.

[0011] Furthermore, the outer shell is cylindrical or prismatic in shape.

[0012] Furthermore, the inner shell is cylindrical or prismatic in shape.

[0013] Furthermore, the high-temperature storage chamber maintains a high-temperature operating condition, which is 800-950℃.

[0014] Furthermore, the medium-temperature storage and insulation cavity maintains a medium-temperature operating condition, which is 400-650℃.

[0015] Furthermore, the outer shell is made of thermal insulation material, and the inner shell is made of heat-permeable material.

[0016] Furthermore, temperature monitoring components are respectively provided on the outer shell and the inner shell, and a control system is installed on the outer wall of the outer shell. The temperature monitoring components are electrically connected to the control system.

[0017] Furthermore, the temperature monitoring component is a temperature sensor.

[0018] Compared with the prior art, the present invention has the following technical effects: 1. In this invention, the storage structure adopts a double-layer cavity separation design, through the partitioning design of a high-temperature storage cavity and a medium-temperature storage insulation cavity, to precisely match... , The different reaction temperature thresholds and operating conditions of the two types of particles, combined with independent material inlet and outlet channels, completely solve the problems of mixed storage of particles, disordered operating conditions, and cross-interference of materials in existing calcium-based adsorbent storage silos, and realize the professional and zoned storage of the two core adsorbent particles.

[0019] 2. In this invention, the storage structure constructs a gradient self-insulating temperature field. The outer shell is made of thermal insulation material, and the inner shell is made of heat-permeable material. The high-temperature storage chamber stores... Granules, stored in a medium-temperature insulated chamber The particles, relying on a layered layout of high internal temperature and medium external temperature, utilize the outer layer The particles and the outer shell made of thermal insulation material, to the inner layer The particles form an all-around thermal barrier. Inner layer The heat dissipation of the particles is absorbed by the outer layer. Particle buffer absorption significantly reduces radiation and convection heat loss during high-temperature static storage, eliminating the need for additional external insulation equipment. The minimalist structure enables self-insulation of the storage chamber, reducing heat loss during adsorbent storage from the source and significantly improving the system's thermal energy utilization rate.

[0020] 3. In this invention, the storage structure can accurately match the reaction temperature threshold, significantly reducing the system's auxiliary heating energy consumption. Targeting the core temperature requirements of 500℃ for the carbonation reaction and 900℃ for the calcination reaction, the partitioned temperature-controlled storage ensures that calcium oxide particles reach the reaction temperature upon discharge, while calcium carbonate particles retain a medium-temperature base. This significantly reduces the temperature difference when particles participate in the reaction again, avoiding the high consumption of a second significant temperature rise after the particles have completely cooled down in traditional storage. This effectively reduces the operating energy consumption of the entire calcium cycle energy storage coupled with carbon capture system, improving the overall efficiency of system energy storage and carbon capture.

[0021] 4. In this invention, the storage silo structure has a high degree of integration, is suitable for continuous and stable engineering operation, requires no complex auxiliary temperature control or insulation equipment, and features a simple structure, strong stability, and convenient maintenance. It is fully compatible with the reversible cycle operation logic of calcium circulation—"carbonization for carbon capture - calcination for carbon release and heat storage"—enabling continuous material input and output and uninterrupted storage and supply. This solves the technical shortcomings of traditional storage silos, such as large fluctuations in operating conditions and difficulty in adapting to large-scale continuous production, significantly improving the overall operational stability and engineering application value of the system. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the double-layer cavity storage structure according to an embodiment of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the double-layer cavity storage structure according to an embodiment of the present invention. Figure 2 ; Figure 3This is a schematic diagram of the double-layer cavity storage structure according to an embodiment of the present invention. Figure 3 .

[0023] In the diagram: 1. Outer shell, 2. Inner shell, 3. High-temperature storage chamber, 4. Medium-temperature storage and insulation chamber, 5. First opening, 6. Second opening. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present invention.

[0025] In this article, terms such as "left," "right," "up," "down," "front," and "back" are established based on the positional relationships shown in the attached drawings. Depending on the attached drawings, the corresponding positional relationships may also change. Therefore, they should not be interpreted as an absolute limitation on the scope of protection.

[0026] Please see Figures 1 to 3 This invention provides a double-layer cavity storage structure for calcium-based particles, comprising an outer shell 1 and an inner shell 2. The inner shell 2 is disposed within the cavity of the outer shell 1. The outer shell 1 is made of thermal insulation material, and the inner shell 2 is made of heat-permeable material. Preferably, the outer shell 1 can be cylindrical or prismatic in shape, and the inner shell 2 can be cylindrical or prismatic in shape, with the outer shell 1 and inner shell 2 fitting together.

[0027] Specifically, the inner cavity of the inner shell 2 is a high-temperature storage chamber 3, and the space between the inner shell 2 and the outer shell 1 is a medium-temperature storage and insulation chamber 4. One end of the outer shell 1 has a first opening 5, and the inner shell 2 has a second opening 6. The high-temperature storage chamber 3 is connected to the outside through the second opening 6, and the medium-temperature storage and insulation chamber 4 is connected to the outside through the first opening 5. The high-temperature storage chamber 3 and the medium-temperature storage and insulation chamber 4 are independent of each other and each has its own independent inlet and outlet. The two material conveying systems are independent of each other and can respectively realize different temperatures and different reaction states. Particles and The independent and precise feeding, fixed material discharge, and static storage of the granules completely avoid the mixing of two types of granules and interference with the working conditions.

[0028] Specifically, the high-temperature storage chamber 3 stores... The core heat storage area, consisting of granules, maintains a high-temperature operating condition (800-950℃) for extended periods. It stores highly reactive calcium oxide granules (above 500℃) before the carbonation reaction is complete, providing a reserve of high-temperature materials for subsequent carbon capture and carbonation reactions. The medium-temperature storage insulated chamber 4 stores… Granules are stored in a medium-temperature insulated chamber 4, maintaining a medium-temperature operating condition of 400-650℃. This storage is for granules that have completed the carbonation reaction and are awaiting high-temperature calcination and decomposition. Granules, suitable for the pre-storage requirements of calcium carbonate subsequent calcination and regeneration at 900℃.

[0029] Specifically, temperature monitoring components are respectively installed on the outer shell 1 and the inner shell 2, and a control system is installed on the outer wall of the outer shell 1. The temperature monitoring components are electrically connected to the control system. Preferably, the temperature monitoring components are temperature sensors. The temperature sensors are used to collect the temperature inside the high-temperature storage chamber 3 and the medium-temperature storage insulation chamber 4 in real time, and then transmit the data to the control system in real time. The staff can monitor the temperature inside the two chambers in real time through the control system.

[0030] Specifically, the working method of this invention is as follows: the storage structure constructs a gradient temperature field with high internal temperature and medium external temperature, and the high-temperature storage cavity 3 contains... Particles lose heat outwards, which can be absorbed by the outer layer. The particulate layer effectively blocks and absorbs heat, and together with the outer shell 1 made of thermal insulation material, a self-insulating cavity system is formed, significantly reducing heat loss. The particles lose heat through radiation and convection to the external environment. Meanwhile, the outer layer... The particles themselves are stored at a medium temperature, and their heat loss is much lower than that of high-temperature particles, so there is no need for frequent reheating and insulation.

[0031] The high temperature required for the carbon capture process during system operation The granules are discharged independently from the high-temperature storage chamber 3, directly meeting the carbonation reaction temperature requirements above 500℃ without significant reheating; the calcination and regeneration process requires... The granules are discharged independently from the medium-temperature storage and insulation chamber 4. The energy consumption for heating the particles to 900℃ is significantly reduced, and the entire process achieves low loss, high precision, and partitioned storage of calcium-based particles, which is compatible with the continuous cycle operation logic of the calcium cycle energy storage coupled carbon capture system.

[0032] Specifically, in this invention, the storage structure adopts a double-cavity partition design, precisely matching the high-temperature storage cavity 3 and the medium-temperature storage insulation cavity 4 through a partition design. , The different reaction temperature thresholds and operating conditions of the two types of particles, combined with independent material inlet and outlet channels, completely solve the problems of mixed storage of particles, disordered operating conditions, and cross-interference of materials in existing calcium-based adsorbent storage silos, and realize the professional and zoned storage of the two core adsorbent particles.

[0033] Specifically, in this invention, the storage structure constructs a gradient self-insulating temperature field. The outer shell 1 is made of thermal insulation material, the inner shell 2 is made of heat-permeable material, and the high-temperature storage cavity 3 stores... Granules, stored in the medium-temperature insulated cavity 4 The particles, relying on a layered layout of high internal temperature and medium external temperature, utilize the outer layer The particles and the outer shell 1 made of thermal insulation material, for the inner layer The particles form an all-around thermal barrier. Inner layer The heat dissipation of the particles is absorbed by the outer layer. Particle buffer absorption significantly reduces radiation and convection heat loss during high-temperature static storage, eliminating the need for additional external insulation equipment. The minimalist structure enables self-insulation of the storage chamber, reducing heat loss during adsorbent storage from the source and significantly improving the system's thermal energy utilization rate.

[0034] Specifically, in this invention, the storage structure can accurately match the reaction temperature threshold, significantly reducing the system's auxiliary heating energy consumption. Targeting the core temperature requirements of 500℃ for the carbonation reaction and 900℃ for the calcination reaction, the partitioned temperature-controlled storage ensures that calcium oxide particles reach the reaction temperature upon discharge, while calcium carbonate particles retain a medium-temperature base. This significantly reduces the temperature difference when particles participate in the reaction again, avoiding the high consumption associated with a second significant temperature increase after the particles have completely cooled down in traditional storage systems. This effectively reduces the operating energy consumption of the entire calcium cycle energy storage coupled with carbon capture system, improving the overall efficiency of system energy storage and carbon capture.

[0035] Specifically, in this reaction, the storage silo structure is highly integrated, adaptable to continuous and stable engineering operation, and requires no complex auxiliary temperature control or insulation equipment. It features a simple structure, strong stability, and convenient maintenance. It is fully compatible with the reversible cycle operation logic of calcium circulation—"carbonization for carbon capture - calcination for carbon release and heat storage"—enabling continuous material input and output and uninterrupted storage and supply. This overcomes the technical shortcomings of traditional storage silos, such as large fluctuations in operating conditions and difficulty in adapting to large-scale continuous production, significantly improving the overall operational stability and engineering application value of the system.

[0036] The above embodiments merely illustrate the basic principles and characteristics of the present invention, but are not limited to the above implementation schemes. It should be understood that those skilled in the art can make various changes and modifications to the present invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A double-layer cavity storage structure for calcium-based particles, characterized in that, It includes an outer shell (1) and an inner shell (2). The inner shell (2) is disposed in the inner cavity of the outer shell (1). The inner cavity of the inner shell (2) is a high-temperature storage cavity (3). The space between the inner shell (2) and the outer shell (1) is a medium-temperature storage and insulation cavity (4). One end of the outer shell (1) is provided with a first opening (5). The inner shell (2) is provided with a second opening (6). The high-temperature storage cavity (3) is connected to the outside through the second opening (6). The medium-temperature storage and insulation cavity (4) is connected to the outside through the first opening (5).

2. The double-layer cavity storage structure for calcium-based particles according to claim 1, characterized in that, The high-temperature storage chamber (3) stores Particles.

3. The double-layer cavity storage structure for calcium-based particles according to claim 1, characterized in that, The medium-temperature storage insulation cavity (4) stores Particles.

4. The double-layer cavity storage structure for calcium-based particles according to claim 1, characterized in that, The outer shell (1) is cylindrical or prismatic in shape.

5. The double-layer cavity storage structure for calcium-based particles according to claim 1, characterized in that, The inner shell (2) is cylindrical or prismatic in shape.

6. The double-layer cavity storage structure for calcium-based particles according to claim 1, characterized in that, The high-temperature storage chamber (3) maintains a high-temperature operating condition, the temperature of which is 800-950℃.

7. The double-layer cavity storage structure for calcium-based particles according to claim 1, characterized in that, The medium-temperature storage and insulation cavity (4) maintains a medium-temperature operating condition, the temperature of which is 400-650℃.

8. The double-layer cavity storage structure for calcium-based particles according to claim 1, characterized in that, The outer shell (1) is made of thermal insulation material, and the inner shell (2) is made of heat-permeable material.

9. The double-layer cavity storage structure for calcium-based particles according to claim 1, characterized in that, Temperature monitoring components are respectively provided on the outer shell (1) and the inner shell (2). A control system is installed on the outer wall of the outer shell (1). The temperature monitoring components are electrically connected to the control system.

10. The double-layer cavity storage structure for calcium-based particles according to claim 9, characterized in that, The temperature monitoring component is a temperature sensor.

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