A particle heat exchange device

Abstract

The invention discloses a particle heat exchange device, comprising a particle feeder, a heat exchange chamber, a heat transfer system, and a power cycle working fluid heat exchange pipe. The heat transfer system is arranged above the heat exchange chamber. The heat transfer system comprises a heat transfer working fluid header and a plurality of heat transfer buried pipes. One end of the heat transfer buried pipe is connected to the heat transfer working fluid header, and the other end is in contact with the particle accumulation layer. The heat transfer working fluid in the heat transfer buried pipe absorbs the heat of the high-temperature particles, evaporates to form heat transfer working fluid steam and is collected in the heat transfer working fluid header. The power cycle working fluid heat exchange pipe passes through the heat transfer working fluid header. The power cycle working fluid in the power cycle working fluid heat exchange pipe absorbs the heat of the heat transfer working fluid steam. The heat transfer working fluid steam condenses and flows back into the heat transfer buried pipe. The particle heat exchange device disclosed by the invention adopts the heat transfer principle of phase change of the heat transfer working fluid, indirectly transfers the heat of the high-temperature particles to the power cycle working fluid, avoids direct contact between the high-temperature and high-pressure heat exchange surface and the particles, effectively prevents the wear and cracking of the heat exchange surface, and improves the service life of the equipment.

Description

Technical Field

[0001] The invention belongs to the technical field of high-temperature particle heat exchange utilizing solar energy, and in particular relates to a particle heat exchange device. Background Art

[0002] Solar energy is a green, sustainable and clean energy, and thus may become an ideal main energy source in the future. At present, the medium used for solar heat absorption and storage is binary molten salt (60% NaNO3 + 40% KNO3), but its applicable temperature is limited to below 600℃, which seriously limits the improvement of solar photovoltaic efficiency. Therefore, finding a higher temperature heat absorption and storage medium has become the current key research direction.

[0003] Solid particle heat absorption and storage technology is a new type of solar energy heat absorption and storage technology. Due to the high heat absorption temperature of particles and low price, it is an ideal high-temperature heat absorption and heat storage medium. After absorbing heat, the high-temperature particles transfer heat to the power cycle working fluid through the heat exchanger. Due to the high temperature and high pressure characteristics of the power cycle working fluid of the power generation system, the heat exchanger is one of the main technical difficulties in the application of particle heat absorption and storage technology. At present, the main forms of heat exchangers at home and abroad are: plate and shell heat exchangers represented by Sandy Laboratory in the United States, shell and tube heat exchangers and fluidized bed heat exchangers. Shell and tube heat exchangers represented by Xi'an Jiaotong University, fluidized bed heat exchangers represented by Zhejiang University, etc. However, these particle heat exchangers use direct contact heat exchange, with a low total heat transfer coefficient, which increases the amount of high-temperature alloys and increases the equipment cost. At the same time, the wall thickness of the heat exchange surface of high temperature and high pressure is usually larger, and the wear of the particles on the heat exchange surface further increases the wall thickness requirements of the heat exchange surface, reduces the heat transfer coefficient, and increases the risk of heat exchange surface bursting.

[0004] Therefore, in order to solve the above problems, it is necessary to design and develop a new type of particle heat exchange equipment. Summary of the invention

[0005] The purpose of the present invention is to provide a particle heat exchange device with a high total heat transfer coefficient, which can realize efficient heat exchange between high-temperature solid particles and the power cycle working fluid of the power generation system, while effectively avoiding the wear of the particles on the high-temperature and high-pressure heat exchange surface.

[0006] To solve the above problems, the technical solution of the present invention is:

[0007] A particle heat exchange device, comprising a particle feeder, a heat exchange chamber, a heat transfer system, a power cycle working medium heat exchange tube and a particle cold tank;

[0008] The particle feeder is used to provide high-temperature particles;

[0009] The heat exchange chamber comprises a feed end and a discharge end, and the feed end of the heat exchange chamber is located higher than the discharge end of the heat exchange chamber, the feed end of the heat exchange chamber is connected to the discharge end of the particle feeder, and the high-temperature particles form a particle accumulation layer on the bottom plate of the heat exchange chamber;

[0010] The heat transfer system is arranged above the heat exchange chamber, and comprises a heat transfer medium header and a plurality of heat transfer buried pipes, one end of the plurality of heat transfer buried pipes is connected to the heat transfer medium header, and the other end of the heat transfer buried pipes extends into the heat exchange chamber and contacts the particle accumulation layer, and the heat transfer buried pipes contain heat transfer medium, and the heat transfer medium absorbs the heat of the high-temperature particles, evaporates to form heat transfer medium vapor and is collected in the heat transfer medium header;

[0011] The power cycle working medium heat exchange tube passes through the heat transfer working medium header and can be in direct contact with the heat transfer working medium steam;

[0012] The first feed port of the particle cold tank is communicated with the discharge end of the heat exchange chamber and is used for collecting particles falling from the heat exchange chamber.

[0013] Preferably, it also includes a fluidizing air system to provide fluidizing air to the particle accumulation layer.

[0014] Preferably, the fluidizing air system comprises a fluidizing fan, a plurality of air chambers and air delivery ducts having the same number as the air chambers;

[0015] The fluidizing fan provides fluidizing air, and the plurality of air chambers are respectively connected to the fluidizing fan through the air delivery pipes;

[0016] A plurality of wind chambers are arranged on the bottom plate of the heat exchange chamber on a side opposite to the particle accumulation layer along the direction in which the high-temperature particles slide down, and the wind chambers convey fluidizing air to the particle accumulation layer to fluidize the high-temperature particles.

[0017] Preferably, a plurality of the air supply pipelines are provided with air chamber flow regulating valves.

[0018] Preferably, the heat exchange chamber is provided with an air outlet for discharging the fluidizing air.

[0019] Preferably, it also includes a particle replenishment system, which includes at least a cold particle storage tank and a particle regenerator. The discharge port of the cold particle storage tank is connected to the feed port of the particle regenerator. The particle regenerator is also provided with an air inlet, which is connected to the air inlet of the particle regenerator. The waste heat of the fluidizing air is used to heat the particles in the particle regenerator. The discharge port of the particle regenerator is connected to the second feed port of the particle cold tank.

[0020] Preferably, it also includes a blanking chamber, which is arranged between the heat exchange chamber and the particle cold tank, the feed port of the blanking chamber is connected with the discharge port of the heat exchange chamber, the discharge port of the blanking chamber is connected with the first feed port of the particle cold tank, and a first particle flow regulating valve is arranged between the discharge port of the blanking chamber and the first feed port of the particle cold tank, which is used to adjust the thickness of the particle accumulation layer on the bottom plate of the heat exchange chamber.

[0021] Preferably, the particle feeder adopts a piston feeding structure, and the particle feeder comprises a piston and a storage cylinder, and the piston pushes the high-temperature particles in the storage cylinder to slide from the discharge end into the heat exchange chamber.

[0022] Preferably, the storage cylinder is further provided with a storage cylinder feed port, the storage cylinder is arranged at an incline, and the position of the storage cylinder feed port is lower than the position of the discharge end of the storage cylinder.

[0023] Due to the adoption of the above technical solution, the present invention has the following advantages and positive effects compared with the prior art:

[0024] 1) The heat transfer principle of phase change of heat transfer medium is adopted to indirectly transfer the heat of high-temperature particles to the power cycle medium, avoiding direct contact between the high-temperature and high-pressure heat exchange surface and the particles, effectively preventing the wear and cracking of the heat exchange surface and improving the service life of the equipment.

[0025] 2) The heat absorption of phase change heat transfer is large, and the temperature is almost unchanged, and the heat transfer rate is fast. The heat transfer between the heat transfer medium steam and the power cycle medium is mainly based on convection heat transfer, and the heat transfer intensity is also higher than the heat transfer between the particles and the heat transfer surface. Therefore, the overall heat transfer coefficient of the heat exchange equipment is high.

[0026] 3) The heat transfer buried pipe contains heat transfer medium, the pressure is low, the pipe wall thickness is small, and the heat transfer coefficient is increased. The power circulation medium in the heat transfer medium header does not come into direct contact with the particles, and no wear allowance is required, so the wall thickness is small and the heat transfer coefficient is high.

[0027] 4) There is a certain height of liquid working medium at the bottom of the heat transfer medium header, and gaseous working medium in the middle and upper parts. For traditional independent heat pipes, the heat pipes on the high-temperature particle side may overheat, and the heat transfer medium header can prevent the single buried pipe from overheating.

[0028] 5) The fluidized air system adopts the fluidized bed heat exchange form. The fluidized air is controlled in sections, which can realize the section control of the fluidization state of the particle accumulation layer, adjust the heat exchange intensity of different sections, and ensure the temperature of the power cycle working medium.

[0029] 6) The waste heat of the fluidizing air is utilized through the feeding system to maximize energy utilization and ensure timely replenishment of particles in the storage and heat exchange system after loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A schematic structural diagram of a particle heat exchange device provided in an embodiment of the present invention;

[0031] Figure 2 for Figure 1 Enlarged view of the heat exchange chamber and heat transfer system.

[0032] Description of reference numerals:

[0033] 1: Particle feeder; 11: Piston; 12: Storage cylinder; 121: Storage cylinder feed port; 2: Heat exchange chamber; 21: Particle accumulation layer; 22: Air outlet; 3: Heat transfer system; 31: Heat transfer medium header; 32: Heat transfer buried pipe; 4: Power cycle medium heat exchange pipe; 41: Power cycle medium inlet; 42: Power cycle medium outlet; 5: Particle cold tank; 6: Fluidizing air system; 61: Fluidizing fan; 62: Wind chamber; 63: Air delivery pipeline; 64: Wind chamber flow regulating valve; 65: Fluidizing air volume regulating valve; 7: Particle replenishing system; 71: Cold particle storage tank; 72: Particle regenerator; 73: Second particle flow regulating valve; 74: Third particle flow regulating valve; 8: Dropping chamber; 81: First particle flow regulating valve; 9: Particle hot tank. DETAILED DESCRIPTION

[0034] The particle heat exchange device proposed by the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more apparent from the following description and claims.

[0035] See also Figure 1 , Figure 2 As shown, the present invention provides a particle heat exchange device, including a particle feeder 1, a heat exchange chamber 2, a heat transfer system 3, a power cycle working medium heat exchange pipe 4 and a particle cold tank 5;

[0036] The particle feeder 1 is used to provide high-temperature particles. In this embodiment, the particle feeder 1 adopts a piston feeding structure. Figure 1 As shown, the particle feeder 1 includes a piston 11 and a storage cylinder 12. One end of the storage cylinder 12 is open, and the opening is the discharge end of the storage cylinder 12. A storage cylinder feed port 121 is provided on the side wall of the storage cylinder 12. High-temperature particles enter the storage cylinder 12 from the storage cylinder feed port 121. The piston 11 pushes the high-temperature particles in the storage cylinder 12 to slide from the discharge end into the heat exchange chamber 2. The piston 11 can adjust the feeding amount of the particle feeder 1 according to the heat exchange demand.

[0037] In this embodiment, the particle heat exchange device further includes a particle heat tank 9, which is a high-temperature storage tank. The particles are stored in the particle heat tank 9 after absorbing heat from the heat absorption system and heating up. Figure 1As shown, the pellet hot tank 9 is arranged directly above the pellet feeder 1, and the discharge port of the pellet hot tank 9 is connected to the feed port 121 of the storage cylinder, and the high-temperature pellets in the pellet hot tank 9 fall into the pellet feeder 1 by gravity;

[0038] In this embodiment, the storage cylinder 12 is arranged obliquely, and the position of the storage cylinder feed port 121 is lower than the position of the discharge end of the storage cylinder 12. After the high-temperature particles fall from the particle hot tank 9 into the storage cylinder 12 by gravity, the high-temperature particles first fill the storage cylinder 12 due to the angle of inclination. According to the heat exchange requirements, the piston 11 pushes an appropriate amount of high-temperature particles to slide from the discharge end into the heat exchange chamber 2 to achieve uniform feeding;

[0039] The heat exchange chamber 2 includes a feed end and a discharge end, and the feed end of the heat exchange chamber 2 is higher than the discharge end of the heat exchange chamber. The feed end of the heat exchange chamber 2 is connected to the discharge end of the storage cylinder 12. The high-temperature particles slide from the discharge end of the storage cylinder 12 onto the bottom plate of the heat exchange chamber 2 and form a particle accumulation layer 12 on the floor of the heat exchange chamber 2.

[0040] In the present embodiment, a blanking chamber 8 is further provided below the heat exchange chamber 2, the feed port of the blanking chamber 8 is communicated with the discharge end of the heat exchange chamber 2, the discharge port of the blanking chamber 8 is communicated with the first feed port of the particle cold tank 5, and a first particle flow regulating valve 81 is provided between the discharge port of the blanking chamber 8 and the first feed port of the particle cold tank 5. After the high-temperature particles enter the heat exchange chamber 2, they slide along the inclined bottom plate 2 to the blanking chamber 8. By controlling the first particle flow regulating valve 81 and cooperating with the feeding speed of the particle feeder 1, the thickness of the particle accumulation layer 21 on the bottom plate of the heat exchange chamber 2 is controlled, thereby adjusting the heat exchange amount of the heat exchange equipment; in the present embodiment, refer to Figure 1 As shown, the heat exchange chamber 2 and the blanking chamber 8 are designed as one body;

[0041] There are two ways to set the inclination angle of the bottom plate of the heat exchange chamber 2. The first way is that the inclination angle is greater than the natural accumulation angle of the particles, so that the upper particles of the particle accumulation layer 21 can slide down smoothly. The second way is that when a fluidizing air system is set below the inclined bottom plate 2, after providing fluidizing air to the particle accumulation layer 21, the inclination angle of the inclined bottom plate 2 can be less than the natural accumulation angle of the particles, and the particles can move downward at a uniform speed by relying on the fluidizing air. The fluidizing air can not only play a role in enhancing heat transfer, but also provide kinetic energy for the movement of particles.

[0042] In this embodiment, see Figure 2 As shown, the heat exchange chamber 2 is also provided with an air outlet 22, which is located above the feed end of the heat exchange chamber 2. The main purpose of the air outlet 22 is that when the heat exchange equipment adds a fluidizing air system to provide fluidizing air to the particle accumulation layer 21, the air outlet 22 can discharge the fluidizing air in the heat exchange chamber 2.

[0043] The heat transfer system 3 is arranged above the heat exchange chamber 2. The heat transfer system 3 includes a heat transfer medium header 31 and a plurality of heat transfer buried pipes 32. One end of the plurality of heat transfer buried pipes 32 is connected to the heat transfer medium header 31. The other end of the heat transfer buried pipes 32 extends into the heat exchange chamber 2 and directly contacts the particle accumulation layer 21. The heat transfer buried pipes 32 contain heat transfer medium. The heat transfer medium absorbs the heat of the high-temperature particles, evaporates to form heat transfer medium vapor, and is collected in the heat transfer medium header 31.

[0044] In this embodiment, see Figure 1 As shown, a plurality of buried heat transfer pipes 32 are suspended parallel to the bottom of the heat transfer medium header 31 along the inclined direction of the bottom plate of the heat exchange chamber 2. The upper ends of the buried heat transfer pipes 32 are connected to the heat transfer medium header 31, and the lower ends of the buried heat transfer pipes 32 are buried in the particle accumulation layer 21 and directly contact with the high-temperature particles. The buried heat transfer pipes 32 contain heat transfer medium, which flows in the buried heat transfer pipes 32, absorbs the heat of the high-temperature particles, evaporates to form heat transfer medium steam and rises into the heat transfer medium header 31. The particle heat exchange equipment provided by the present invention adopts the phase change heat transfer principle of the heat transfer medium, indirectly transfers the heat of the high-temperature particles to the power cycle medium, avoids the direct contact between the high-temperature and high-pressure heat exchange surface and the high-temperature particles, effectively prevents the wear and rupture of the heat exchange surface, and improves the service life of the equipment. The phase change heat transfer absorbs a large amount of heat and the temperature is almost unchanged, so the heat transfer rate is fast. In addition, the heat transfer medium in the buried heat transfer pipes 32 has a low pressure and a small pipe wall thickness, which increases the heat transfer coefficient. The power circulation medium in the heat transfer medium header does not come into direct contact with the particles, and no wear allowance is required, so the wall thickness is small and the heat transfer coefficient is high. There is a certain height of liquid medium at the bottom of the heat transfer medium header 21, and gaseous medium in the middle and upper parts. For traditional independent heat pipes, the heat pipe on the high-temperature particle side may overheat, and the heat transfer medium header can prevent the single buried pipe from overheating.

[0045] The power cycle working medium heat exchange tube 4 passes through the heat transfer working medium header 31 and can be in direct contact with the heat transfer working medium steam. In this embodiment, the power cycle working medium heat exchange tube 4 is located in the heat transfer working medium header 31. The two ends of the power cycle working medium heat exchange tube 4 are respectively provided with a power cycle working medium inlet 41 and a power cycle working medium outlet 42. The power cycle working medium heat exchange tube 4 flows with the power cycle working medium. Figure 1 As shown by the arrow in , the power cycle working fluid flows in from the power cycle working fluid inlet 41, the power cycle working fluid absorbs the heat of the heat transfer working fluid steam and heats up, the heated power cycle working fluid flows out from the power cycle working fluid outlet 42, the heat transfer working fluid steam condenses and flows back into the heat transfer buried pipe 32, the heat exchange between the heat transfer working fluid steam and the power cycle working fluid is mainly convective heat transfer, the heat exchange intensity is higher than the heat conduction heat transfer between the particles and the heat exchange surface, and the overall heat transfer coefficient of the heat exchange equipment is high.

[0046] The feed port of the particle cold tank 5 is connected to the discharge end of the heat exchange chamber 2, and is used to collect particles sliding down from the heat exchange chamber 2 to achieve particle recycling and reuse. In this embodiment, the particle cold tank 5 is arranged below the drop chamber 8, and the particles in the heat exchange chamber 2 slide into the particle cold tank 5 through the drop chamber 8.

[0047] In this embodiment, the particle heat exchange device further includes a fluidizing air system 6, which provides fluidizing air to the particle accumulation layer 21 to enhance the heat transfer of the particles;

[0048] Preferably, the fluidizing air system 6 includes a fluidizing fan 61, a plurality of air chambers 62, and air delivery pipes 63 with the same number as the air chambers 62. The fluidizing fan 61 provides fluidizing air. In this embodiment, the fluidizing fan 61 generates high-pressure air. A fluidizing air volume regulating valve 65 is provided at the air inlet of the fluidizing fan 61 for regulating the air volume of the fluidizing fan 61. The plurality of air chambers 62 are respectively connected to the fluidizing fan 61 through the air delivery pipes 63. The plurality of air chambers 62 are provided on the bottom plate of the heat exchange chamber 2 and are connected to the particle accumulation layer 2 along the direction in which the high-temperature particles slide down. On the side opposite to the upper surface of the granule stacking layer 21, the plenum 62 delivers high-pressure fluidizing air to the granule stacking layer 21 to fluidize the high-temperature granules and enhance the granule heat transfer. A plurality of plenum flow regulating valves 64 are provided on the plenum flow pipes 63 to adjust the air volume entering the plenum 62. The fluidizing air system 6 adopted in this embodiment adopts a fluidized bed heat exchange form. By adjusting the plenum flow regulating valves 64 on the plenum flow pipes 63 respectively, segmented control can be achieved to adjust the air volume in different sections, thereby controlling the heat exchange intensity in different sections and the falling speed of the granules on the inclined bottom plate 2.

[0049] Preferably, a particle heat exchange device provided in this embodiment also includes a particle replenishment system 7, and the particle replenishment system 7 includes at least a cold particle storage tank 71 and a particle regenerator 72. The cold particle storage tank 71 stores room temperature particles, and the discharge port of the cold particle storage tank 71 is connected to the feed port of the particle regenerator 72. In this embodiment, a second particle flow regulating valve 73 is provided between the discharge port of the cold particle storage tank 71 and the feed port of the particle regenerator 72, which is used to adjust the flow rate of cold particles entering the particle regenerator 72, and the outlet air Port 22 is connected to the particle reheater 72, and the waste heat of the fluidizing air is used to heat the particles in the particle reheater 72 to reduce the heat loss of the fluidizing air. The discharge port of the particle reheater 72 is connected to the second feed port of the particle cooling tank 5, and the particles heated by the waste heat of the fluidizing air are collected in the particle cooling tank 5. In this embodiment, a third particle flow regulating valve 74 is arranged between the discharge port of the particle reheater 72 and the feed port of the particle cooling tank 5 to regulate the flow of particles entering the particle cooling tank 5 and replenish lost and damaged particles.

[0050] The working process of the particle heat exchange device provided in this embodiment is that after the particles absorb heat and heat up from the heat absorption system, they are stored in the particle heat tank 9 and fall into the storage cylinder 12 by gravity. According to the heat exchange demand, the piston 11 pushes an appropriate amount of high-temperature particles from the discharge end of the storage cylinder 12 to slide into the heat exchange chamber 2. After the particles enter the heat exchange chamber 2 in the heat exchange area, they slide along the bottom plate of the heat exchange chamber 2 to the blanking chamber 8. By controlling the first particle flow regulating valve 81 in the blanking chamber 8 and adjusting the feeding amount of the particle feeder 1, the thickness of the particle accumulation layer 21 is controlled, thereby adjusting the heat exchange amount of the heat exchange equipment. The particle accumulation layer 21 is the heat exchange area between the high-temperature particles and the heat transfer medium. The heat transfer buried pipe 32 is in direct contact with the high-temperature particles for heat exchange. The fluidized bed heat exchange form is adopted, and the heat is introduced from the bottom. The incoming fluidizing air enhances the heat exchange capacity, and the fluidizing air is controlled by regional regulation to realize the control of the heat exchange amount in different areas. The heat transfer medium absorbs the heat of the particles and evaporates, and the steam is collected in the heat transfer medium header 31. The power cycle working fluid in the power cycle working fluid heat exchange tube 4 absorbs the latent heat of the heat transfer working fluid steam and heats up. The heat transfer working fluid steam condenses and flows back to the heat transfer buried pipe 32. The particles will continue to be lost and worn during the heat storage and heat exchange cycle, so the particles must be replenished. The room temperature particles are stored in the cold particle storage tank 71, and enter the particle regenerator 72 after passing through the second particle flow regulating valve 73. The high-temperature fluidizing air is discharged through the air outlet 22 and connected to the particle regenerator 72 to recycle the waste heat of the fluidizing air. The heated particles are used as supplementary particles for the particle circulation system.

[0051] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, if these changes fall within the scope of the claims of the present invention and their equivalents, they still fall within the protection scope of the present invention.

Claims

1. A particle heat exchange device, characterized in that: It comprises a particle feeder (1), a heat exchange chamber (2), a heat transfer system (3), a power cycle working medium heat exchange pipe (4) and a particle cooling tank (5); The particle feeder (1) is used to provide high-temperature particles; The heat exchange chamber (2) comprises a feed end and a discharge end, and the feed end of the heat exchange chamber (2) is located higher than the discharge end of the heat exchange chamber (2), the feed end of the heat exchange chamber (2) is connected to the discharge end of the particle feeder (1), and the high-temperature particles form a particle accumulation layer (21) on the bottom plate of the heat exchange chamber (2); The heat transfer system (3) is arranged above the heat exchange chamber (2), and comprises a heat transfer medium header (31) and a plurality of heat transfer buried pipes (32). One end of the plurality of heat transfer buried pipes (32) is connected to the heat transfer medium header (31), and the other end of the heat transfer buried pipes (32) extends into the heat exchange chamber (2) to contact the particle accumulation layer (21). The heat transfer buried pipes (32) contain heat transfer medium, and the heat transfer medium absorbs heat from the high-temperature particles, evaporates to form heat transfer medium vapor, and is collected in the heat transfer medium header (31); The power cycle working medium heat exchange tube (4) passes through the heat transfer working medium header (31) and is in direct contact with the heat transfer working medium steam; The first feed port of the particle cold tank (5) is connected to the discharge end of the heat exchange chamber (2) and is used to collect particles that slide down from the heat exchange chamber (2); The particle heat exchange device further comprises a fluidizing air system (6) for providing fluidizing air to the particle accumulation layer (21); The fluidizing air system (6) comprises a fluidizing fan (61), a plurality of wind chambers (62), and air delivery pipes (63) whose number matches the number of the wind chambers (62); The fluidizing fan (61) provides fluidizing air, and the plurality of air chambers (62) are respectively connected to the fluidizing fan (61) through the air delivery pipes (63); A plurality of wind chambers (62) are arranged on a side of the bottom plate of the heat exchange chamber (2) opposite to the particle accumulation layer (21) along the direction in which the high-temperature particles slide down, and the wind chambers (62) convey fluidizing air to the particle accumulation layer (21) to fluidize the high-temperature particles; The heat exchange chamber (2) is provided with an air outlet (22) for discharging fluidizing air; The particle heat exchange device further comprises a particle replenishment system (7), the particle replenishment system (7) comprising at least a cold particle storage tank (71) and a particle regenerator (72), the discharge port of the cold particle storage tank (71) being in communication with the feed port of the particle regenerator (72), the particle regenerator (72) being further provided with an air inlet, the air outlet being in communication with the air inlet of the particle regenerator (72), the particles in the particle regenerator (72) being heated by utilizing the waste heat of the fluidizing air, the discharge port of the particle regenerator (72) being in communication with the second feed port of the particle cold tank (5); The particle heat exchange device further comprises a material drop chamber (8), the material drop chamber (8) being arranged between the heat exchange chamber (2) and the particle cold tank (5), the material feed port of the material drop chamber (8) being connected to the material discharge port of the heat exchange chamber (2), the material discharge port of the material drop chamber (8) being connected to the first material drop port of the particle cold tank (5), and a first particle flow regulating valve (81) being arranged between the material discharge port of the material drop chamber (8) and the first material feed port of the particle cold tank (5) for regulating the thickness of the particle accumulation layer (21) on the bottom plate of the heat exchange chamber (2).

2. The particle heat exchange device according to claim 1, characterized in that: A plurality of the air delivery pipelines (63) are each provided with an air chamber flow regulating valve (64).

3. The particle heat exchange device according to claim 1, characterized in that: The particle feeder (1) adopts a piston feeding structure. The particle feeder (1) comprises a piston (11) and a storage cylinder (12). The piston (11) pushes the high-temperature particles in the storage cylinder (12) to slide from the discharge end into the heat exchange chamber (2).

4. The particle heat exchange device according to claim 3, characterized in that: The material storage cylinder (12) is also provided with a material storage cylinder feed port (121). The material storage cylinder (12) is arranged tilted, and the position of the material storage cylinder feed port (121) is lower than the position of the discharge end of the material storage cylinder (12).

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