heat exchange device

Abstract

To achieve compactification.SOLUTION: A heat exchange device 100 comprises: a dispersion plate 120 that divides the inside of a container 110 into a storage chamber AR for accommodating solid particles and a wind box chamber WR; a partition plate 130 that is separated from the top surface of the storage chamber and the dispersion plate and partitions the inside of the storage chamber into a first chamber FR and a second chamber SR; a first section plate 132 that is erected from the dispersion plate in the first chamber and has an upper end located above the lower end of the partition plate; a second section plate 134 that is erected from the dispersion plate in the second chamber and has an upper end located above the lower end of the partition plate; a first division plate 140 that is provided at a position corresponding to the first section plate in the wind box chamber and divides the inside of the wind box chamber; a second division plate 142 that is provided at a position corresponding to the second section plate in the wind box chamber and divides the inside of the wind box chamber; a fluidization gas supply device 150 that supplies fluidization gas into the wind box chamber; a first heat transfer pipe 170 facing the inside of the first chamber; and a second heat transfer tube 180 facing the inside of the second chamber.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to a heat exchanger.

Background Art

[0002] Conventionally, a circulating fluidized bed boiler including a fluidized bed furnace, a convective heat transfer section, an air preheater, and an external heat exchanger has been developed (for example, Patent Document 1). The fluidized bed furnace fluidizes the fluidized sand by air and burns fuel to heat the fluidized sand. The convective heat transfer section is a heat exchanger that exchanges heat between the combustion exhaust gas exhausted from the fluidized bed furnace and water. The air preheater is provided downstream of the convective heat transfer section and is a heat exchanger that exchanges heat between the combustion exhaust gas and the air supplied to the fluidized bed furnace. The external heat exchanger is a heat exchanger that exchanges heat between the fluidized sand heated in the fluidized bed furnace and water.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the technology of providing a plurality of heat exchangers separately as in Patent Document 1 above, each heat exchanger includes a first flow path through which the fluid to be heat-exchanged passes and a second flow path that is exposed in the first flow path and through which the fluid to be heat-exchanged passes. Therefore, there is a problem that the entire plurality of heat exchangers becomes large-sized and the cost required for heat exchange increases.

[0005] In view of such problems, an object of the present disclosure is to provide a heat exchanger that can be miniaturized.

Means for Solving the Problems

[0006] To solve the above problems, a heat exchange apparatus according to one aspect of the present disclosure comprises a container, a dispersion plate provided inside the container and extending horizontally, having a plurality of holes that divide the inside of the container into a containment chamber for containing solid particles and a wind chamber provided below the containment chamber, a partition plate that is separated from the upper surface of the containment chamber and the dispersion plate and extends vertically, dividing the inside of the containment chamber into a first chamber and a second chamber, a first compartment plate that is erected upward from a point on the dispersion plate located in the first chamber, with its upper end positioned above the lower end of the partition plate, a second compartment plate that is erected upward from a point on the dispersion plate located in the second chamber, with its upper end positioned above the lower end of the partition plate, a first dividing plate provided in the wind chamber at a position corresponding to the first compartment plate, extending vertically, and dividing the inside of the wind chamber, and the wind chamber The windbox comprises: a second dividing plate located at a position corresponding to the second partition plate within the windbox, extending vertically to divide the interior of the windbox; a first fluidizing gas supply unit that supplies fluidizing gas to a first space formed between the side surface of the container in the windbox and the first dividing plate; a second fluidizing gas supply unit that supplies fluidizing gas to a second space formed between the side surface of the container in the windbox and the second dividing plate; a third fluidizing gas supply unit that supplies fluidizing gas to a third space formed between the first and second dividing plates in the windbox; a first heat transfer tube having a first inlet and a first outlet, with at least a portion facing the first chamber, through which the first fluid passes; and a second heat transfer tube having a second inlet and a second outlet different from the first outlet, with at least a portion facing the second chamber, through which the second fluid passes.

[0007] Furthermore, the heat exchange apparatus includes a control unit that controls a first fluidizing gas supply unit, a second fluidizing gas supply unit, and a third fluidizing gas supply unit. The control unit may set the empty tower velocity of the fluidizing gas supplied by the first fluidizing gas supply unit to be greater than the minimum fluidizing speed, and set the empty tower velocity of the fluidizing gas supplied by the second and third fluidizing gas supply units to be the minimum fluidizing speed.

[0008] Furthermore, the heat exchange device includes a control unit that controls the first fluidizing gas supply unit, the second fluidizing gas supply unit, and the third fluidizing gas supply unit. The control unit may increase the empty velocity of the fluidizing gas supplied by the first fluidizing gas supply unit to a predetermined velocity greater than the minimum fluidizing velocity, thereby stopping the operation of the second fluidizing gas supply unit and the third fluidizing gas supply unit.

[0009] Furthermore, the heat exchange device may include a control unit that increases the empty velocity of the fluidizing gas supplied by the first fluidizing gas supply unit, the second fluidizing gas supply unit, and the third fluidizing gas supply unit to a level greater than the minimum fluidizing velocity.

[0010] Furthermore, the heat exchange device includes a third dividing plate provided between the first dividing plate and the second dividing plate in the wind chamber, extending vertically to divide the third space, and a fourth fluidizing gas supply unit that supplies fluidizing gas to the fourth space formed between the second dividing plate and the third dividing plate in the wind chamber, and the third fluidizing gas supply unit may supply fluidizing gas to the fifth space formed between the first dividing plate and the third dividing plate in the wind chamber.

[0011] Furthermore, the heat exchange apparatus includes a control unit that controls the first fluidizing gas supply unit, the second fluidizing gas supply unit, the third fluidizing gas supply unit, and the fourth fluidizing gas supply unit, and the control unit controls the first fluidizing gas supply unit and the 3 The empty velocity of the fluidizing gas supplied by the fluidizing gas supply unit is made greater than the minimum fluidizing velocity, and the second fluidizing gas supply unit and the 4 The empty tower velocity of the fluidizing gas supplied by the fluidizing gas supply unit may be used as the minimum fluidizing velocity.

[0012] Furthermore, the heat exchange device includes a control unit that controls the first fluidizing gas supply unit, the second fluidizing gas supply unit, the third fluidizing gas supply unit, and the fourth fluidizing gas supply unit. The control unit may increase the empty velocity of the fluidizing gas supplied by the first fluidizing gas supply unit to a predetermined velocity greater than the minimum fluidizing velocity, and stop the operation of the second fluidizing gas supply unit, the third fluidizing gas supply unit, and the fourth fluidizing gas supply unit.

[0013] Furthermore, the heat exchange device may include a control unit that increases the empty velocity of the fluidizing gas supplied by the first fluidizing gas supply unit, the second fluidizing gas supply unit, the third fluidizing gas supply unit, and the fourth fluidizing gas supply unit to a level greater than the minimum fluidizing velocity. [Effects of the Invention]

[0014] According to this disclosure, miniaturization becomes possible. [Brief explanation of the drawing]

[0015] [Figure 1] Figure 1 is a diagram illustrating the heat exchange apparatus according to this embodiment. [Figure 2] Figure 2 is a top view of the cross-section of line II-II in Figure 1. [Figure 3] Figure 3 is a horizontal cross-sectional view of the wind chamber. [Figure 4] Figure 4 illustrates the flow of solid particles in the fourth operational process. [Figure 5] Figure 5 illustrates the flow of solid particles in the fifth operational process. [Figure 6] Figure 6 is a diagram illustrating a modified heat exchange device. [Modes for carrying out the invention]

[0016] Embodiments of this disclosure will be described in detail below with reference to the attached drawings. The dimensions, materials, and other specific numerical values ​​shown in the embodiments are merely examples for the purpose of facilitating understanding and do not limit this disclosure unless otherwise specified. In this specification and in the drawings, elements having substantially the same function or configuration are denoted by the same reference numerals to avoid redundant explanations. Elements not directly related to this disclosure are omitted from the illustrations.

[0017] [Heat exchange device 100] FIG. 1 is a diagram for explaining a heat exchanger 100 according to the present embodiment. FIG. 2 is a view of the cross section taken along line II-II in FIG. 1 as seen from above. FIG. 3 is a horizontal cross-sectional view of the wind box chamber WR. In FIG. 2, for ease of understanding, the description of the first heat transfer tube 170, the second heat transfer tube 180, the cyclone 190, and the solid particles is omitted.

[0018] As shown in FIG. 1, the heat exchanger 100 includes a container 110, a dispersion plate 120, a partition plate 130, a first partition plate 132, a second partition plate 134, a first dividing plate 140, a second dividing plate 142, a third dividing plate 144, a fluidizing gas supply device 150, a first heat transfer tube 170, a second heat transfer tube 180, a cyclone 190, and a control unit 200. In FIG. 1, the solid arrows indicate the flow of the fluid.

[0019] The container 110 is, for example, in a rectangular tube shape. In the present embodiment, an exhaust port 112 is formed in the upper surface TS of the container 110.

[0020] The dispersion plate 120 is provided inside the container 110. The dispersion plate 120 extends in the horizontal direction and divides the inside of the container 110 into a storage chamber AR and a wind box chamber WR. A plurality of holes are formed in the dispersion plate 120. The size of the plurality of holes is such that the solid particles described later cannot pass through or it is difficult for them to pass through.

[0021] The storage chamber AR is formed in the upper part of the container 110. Solid particles are stored in the storage chamber AR. The dispersion plate 120 functions as the bottom surface of the storage chamber AR.

[0022] Examples of solid particles include silica, alumina, barite sand (barite, barium sulfate), partially calcined clay, glass spheres, and recovered petroleum catalysts. Preferably, the solid particles are silica and alumina, or both. When silica is used as the solid particle, the cost required for the solid particle can be reduced. Furthermore, by using desert sand or river sand as the solid particle (silica), it becomes possible to obtain it at low cost and easily. In addition, by using alumina, which has a relatively high melting point, the solid particle can be heated to a high temperature, making it possible to achieve a higher energy storage density.

[0023] Solid particles are particles with a diameter of 0.01 mm or more and 10 mm or less. There are no limitations on the shape of the solid particles; they may be spherical or not.

[0024] The wind chamber WR is formed below the containment chamber AR within the container 110.

[0025] The partition plate 130 is installed inside the containment chamber AR. The partition plate 130 is a plate that extends vertically. The upper end of the partition plate 130 is separated from the upper surface of the containment chamber AR (the upper surface TS of the container 110). The lower end of the partition plate 130 is separated from the distribution plate 120 (the bottom surface of the containment chamber AR).

[0026] As shown in Figure 2, both ends of the partition plate 130 in the horizontal direction (front-to-back direction, left-to-right direction) are connected to the side surface SS of the container 110. The partition plate 130 divides the storage chamber AR into a first chamber FR and a second chamber SR.

[0027] Returning to Figure 1, the first partition plate 132 is a plate erected above the bottom surface of the first chamber FR in the containment chamber AR (the portion of the distribution plate 120 located in the first chamber FR). The upper end (tip) of the first partition plate 132 is located above the lower end of the partition plate 130.

[0028] The second partition plate 134 is a plate erected above the bottom surface of the second chamber SR in the containment chamber AR (the portion of the distribution plate 120 located in the second chamber SR). The upper end (tip) of the second partition plate 134 is located above the lower end of the partition plate 130.

[0029] As shown in Figure 2, both horizontal ends of the first compartment plate 132 are connected to the side SS of the container 110. Similarly, both horizontal ends of the second compartment plate 134 are connected to the side SS of the container 110.

[0030] Returning to Figure 1, the first dividing plate 140, the second dividing plate 142, and the third dividing plate 144 are installed inside the wind chamber WR. The first dividing plate 140, the second dividing plate 142, and the third dividing plate 144 divide the space inside the wind chamber WR into four sections.

[0031] The first dividing plate 140 is provided in a position corresponding to the first partition plate 132 within the wind chamber WR. The first dividing plate 140 is a plate that extends vertically. The upper end of the first dividing plate 140 is connected to the upper surface (dispersion plate 120) of the wind chamber WR. The lower end of the first dividing plate 140 is connected to the bottom surface (bottom surface of the container 110) of the wind chamber WR.

[0032] The second dividing plate 142 is provided in a position corresponding to the second partition plate 134 within the wind chamber WR. The second dividing plate 142 is a plate that extends vertically. The upper end of the second dividing plate 142 is connected to the upper surface of the wind chamber WR. The lower end of the second dividing plate 142 is connected to the bottom surface of the wind chamber WR.

[0033] The third dividing plate 144 is provided between the first dividing plate 140 and the second dividing plate 142 within the wind chamber WR. In this embodiment, the third dividing plate 144 is provided at a position corresponding to the partition plate 130 within the wind chamber WR. The third dividing plate 144 is a plate that extends in the vertical direction. The upper end of the third dividing plate 144 is connected to the upper surface of the wind chamber WR. The lower end of the third dividing plate 144 is connected to the bottom surface of the wind chamber WR.

[0034] As shown in Figure 3, both horizontal ends of the first dividing plate 140 are connected to the side SS of the container 110. Similarly, both horizontal ends of the second dividing plate 142 are connected to the side SS of the container 110. In addition, both horizontal ends of the third dividing plate 144 are connected to the side SS of the container 110.

[0035] Therefore, the first divided space P (first space) is formed by the dispersion plate 120, the side SS and bottom surface of the container 110, and the first divided plate 140. The second divided space S (second space) is formed by the dispersion plate 120, the side SS and bottom surface of the container 110, and the second divided plate 142. The third divided space Q (fifth space) is formed by the dispersion plate 120, the bottom surface of the container 110, the first divided plate 140, and the third divided plate 144. The fourth divided space R (fourth space) is formed by the dispersion plate 120, the bottom surface of the container 110, the second divided plate 142, and the third divided plate 144.

[0036] Returning to Figure 1, the fluidized gas supply device 150 supplies fluidized gas to the wind chamber WR. The fluidized gas is, for example, air, combustion exhaust gas, etc. The fluidized gas supply device 150 includes a fluidized gas discharge mechanism 152, a main pipe 154, a first branch pipe 160, a first flow control valve V1, a second branch pipe 162, a second flow control valve V2, a third branch pipe 164, a third flow control valve V3, a fourth branch pipe 166, and a fourth flow control valve V4.

[0037] The fluidizing gas discharge mechanism 152 is, for example, a pump, a blower, etc. The suction side of the fluidizing gas discharge mechanism 152 is connected to a supply source of high-temperature fluidizing gas. The discharge side of the fluidizing gas discharge mechanism 152 is connected to the main piping 154.

[0038] The first branch pipe 160 connects the main pipe 154 and the first divided space P. The first flow control valve V1 is installed in the first branch pipe 160. The first flow control valve V1 changes the flow path cross-sectional area formed in the first branch pipe 160. The fluidizing gas discharge mechanism 152, the main pipe 154, the first branch pipe 160, and the first flow control valve V1 function as the first fluidizing gas supply unit.

[0039] The second branch pipe 162 connects the main pipe 154 to the second divided space S. The second flow control valve V2 is installed in the second branch pipe 162. The second flow control valve V2 changes the flow path cross-sectional area formed in the second branch pipe 162. The fluidized gas discharge mechanism 152, the main pipe 154, the second branch pipe 162, and the second flow control valve V2 function as the second fluidized gas supply unit.

[0040] The third branch pipe 164 connects the main pipe 154 to the third divided space Q. The third flow control valve V3 is installed in the third branch pipe 164. The third flow control valve V3 changes the flow path cross-sectional area formed in the third branch pipe 164. The fluidizing gas discharge mechanism 152, the main pipe 154, the third branch pipe 164, and the third flow control valve V3 function as the third fluidizing gas supply unit.

[0041] The fourth branch pipe 166 connects the main pipe 154 to the fourth divided space R. The fourth flow control valve V4 is installed in the fourth branch pipe 166. The fourth flow control valve V4 changes the flow path cross-sectional area formed in the fourth branch pipe 166. The fluidizing gas discharge mechanism 152, the main pipe 154, the fourth branch pipe 166, and the fourth flow control valve V4 function as the fourth fluidizing gas supply unit.

[0042] The first heat transfer tube 170 has a portion facing into the first chamber FR. The first heat transfer tube 170 has a first inlet 172 and a first outlet 174. The first inlet 172 and the first outlet 174 are located outside the container 110. The first fluid is supplied to the first heat transfer tube 170 through the first inlet 172 and the first fluid is discharged from the first heat transfer tube 170 through the first outlet 174. As a result, the first fluid passes through the first heat transfer tube 170.

[0043] The second heat transfer tube 180 has a portion facing into the second chamber SR. The second heat transfer tube 180 has a second inlet 182 and a second outlet 184. The second inlet 182 and the second outlet 184 are located outside the container 110. The second fluid is supplied to the second heat transfer tube 180 through the second inlet 182 and discharged from the second heat transfer tube 180 through the second outlet 184. As a result, the second fluid passes through the second heat transfer tube 180.

[0044] In this embodiment, the first inlet 172 is different from the second inlet 182, and the first outlet 174 is different from the second outlet 184. Also, in this embodiment, the first fluid and the second fluid are different fluids. The first fluid is, for example, water (water vapor). The second fluid is, for example, air.

[0045] Cyclone 190 separates the solid-gas mixture exhausted from the exhaust port 112 of container 110. The solid-gas mixture contains solid particles and fluidizing gas. The fluidizing gas separated by cyclone 190 is exhausted to the outside. The solid particles separated by cyclone 190 are returned to the containment chamber AR.

[0046] The control unit 200 is composed of a semiconductor integrated circuit including a CPU (Central Processing Unit). The control unit 200 reads programs and parameters for operating the CPU from ROM. The control unit 200 works in cooperation with RAM, which serves as a work area, and other electronic circuits to manage and control the entire heat exchanger 100.

[0047] In this embodiment, the control unit 200 controls the fluidizing gas supply device 150. The control unit 200 switches the operating mode of the heat exchanger 100 to one of the first, second, third, fourth, and fifth operating processes. Each operating process will be described below.

[0048] [First operational process] The first operating process involves exchanging heat between the first fluid passing through the first heat transfer tube 170 and the solid particles, and stopping the heat exchange between the second fluid passing through the second heat transfer tube 180 and the solid particles.

[0049] In the first operation process, the control unit 200 operates the fluidizing gas discharge mechanism 152 and adjusts the opening degree of the first flow control valve V1. In this embodiment, the control unit 200 adjusts the opening degree of the first flow control valve V1 so that the empty column velocity Va of the fluidizing gas supplied into the first chamber FR through the first divided space P and the dispersion plate 120 is greater than a predetermined velocity VA that is greater than the minimum fluidization velocity Umf. The velocity VA is expressed by the following formula (1). VA = Umf × (Horizontal cross-sectional area of ​​the first divided space P + Horizontal cross-sectional area of ​​the third divided space Q) / (Horizontal cross-sectional area of ​​the first divided space P) Equation (1)

[0050] Furthermore, during the first operation process, the control unit 200 closes the second flow control valve V2, the third flow control valve V3, and the fourth flow control valve V4.

[0051] When the first operating process is executed, the solid particles in the first chamber FR become fluid. The solid particles in the first chamber FR are also heated by the heat contained in the fluidizing gas. As a result, heat exchange occurs between the fluidized solid particles and the first fluid passing through the first heat transfer tube 170. Furthermore, since the supply of fluidizing gas to the second chamber SR is stopped, the solid particles in the second chamber SR do not become fluidized. In other words, the solid particles in the second chamber SR hardly move. Also, the solid particles in the second chamber SR are not heated by the fluidizing gas. Therefore, no heat exchange occurs with the second fluid passing through the second heat transfer tube 180.

[0052] [Second operational process] The second operation process involves exchanging heat between the second fluid passing through the second heat transfer tube 180 and the solid particles, and stopping the heat exchange between the first fluid passing through the first heat transfer tube 170 and the solid particles.

[0053] In the second operation process, the control unit 200 operates the fluidizing gas discharge mechanism 152 and adjusts the opening degree of the second flow control valve V2. In this embodiment, the control unit 200 adjusts the opening degree of the second flow control valve V2 so that the empty column velocity Vb of the fluidizing gas supplied into the second chamber SR through the second divided space S and the dispersion plate 120 is greater than a predetermined velocity VB that is greater than the minimum fluidizing velocity Umf. The velocity VB is expressed by the following equation (2). VB = Umf × (Horizontal cross-sectional area of ​​the second divided space S + Horizontal cross-sectional area of ​​the fourth divided space R) / (Horizontal cross-sectional area of ​​the second divided space S) Equation (2)

[0054] Furthermore, during the second operation process, the control unit 200 closes the first flow control valve V1, the third flow control valve V3, and the fourth flow control valve V4.

[0055] When the second operating process is executed, the solid particles in the second chamber SR become fluid. Furthermore, the heat from the fluidizing gas heats the solid particles in the second chamber SR. This results in heat exchange between the fluidized solid particles and the second fluid passing through the second heat transfer tube 180. Additionally, since the supply of fluidizing gas to the first chamber FR is stopped, the solid particles in the first chamber FR do not become fluidized. In other words, the solid particles in the first chamber FR hardly move. Furthermore, the solid particles in the first chamber FR are not heated by the fluidizing gas. Therefore, no heat exchange occurs with the first fluid passing through the first heat transfer tube 170.

[0056] [Third operational process] The third operating process involves exchanging heat between the first fluid passing through the first heat transfer tube 170 and the solid particles, and exchanging heat between the second fluid passing through the second heat transfer tube 180 and the solid particles, thereby making the temperatures of the first and second fluids substantially equal.

[0057] In the third operation process, the control unit 200 operates the fluidizing gas discharge mechanism 152 and adjusts the opening degrees of the first flow control valve V1, the second flow control valve V2, the third flow control valve V3, and the fourth flow control valve V4. In this embodiment, the control unit 200 adjusts the opening degrees of the first flow control valve V1, the second flow control valve V2, the third flow control valve V3, and the fourth flow control valve V4 so that the empty column velocity of the fluidizing gas supplied to the first chamber FR through the first divided space P, the third divided space Q, and the dispersion plate 120, and the empty column velocity of the fluidizing gas supplied to the second chamber SR through the second divided space S, the fourth divided space R, and the dispersion plate 120 are at predetermined velocities greater than the minimum fluidization velocity Umf.

[0058] When the third operating process is executed, the solid particles in the first chamber FR and the solid particles in the second chamber SR become fluid. In addition, the solid particles in the first chamber FR and the solid particles in the second chamber SR are heated by the heat contained in the fluidizing gas. As a result, heat exchange occurs in the first chamber FR between the fluidized solid particles and the first fluid passing through the first heat transfer tube 170, and heat exchange occurs in the second chamber SR between the fluidized solid particles and the second fluid passing through the second heat transfer tube 180.

[0059] Furthermore, the control unit 200 makes the empty velocity of the fluidizing gas supplied to the first chamber FR substantially equal to the empty velocity of the fluidizing gas supplied to the second chamber SR. This allows the solid particles in the first chamber FR and the solid particles in the second chamber SR to be heated substantially equally. It also allows the solid particles in the first chamber FR and the solid particles in the second chamber SR to be fluidized substantially equally. Therefore, by performing the third operation process, the temperatures of the first fluid and the second fluid can be made substantially equal.

[0060] [Fourth operational process] The fourth operating process involves exchanging heat between the first fluid passing through the first heat transfer tube 170 and the solid particles, and exchanging heat between the second fluid passing through the second heat transfer tube 180 and the solid particles, thereby raising the temperature of the second fluid to a higher temperature than the temperature of the first fluid.

[0061] In the fourth operation process, the control unit 200 operates the fluidizing gas discharge mechanism 152 and adjusts the opening degrees of the first flow control valve V1, the second flow control valve V2, the third flow control valve V3, and the fourth flow control valve V4. In this embodiment, the control unit 200 adjusts the opening degrees of the first flow control valve V1 and the third flow control valve V3 so that the empty column velocity of the fluidizing gas supplied into the first chamber FR through the first divided space P, the third divided space Q, and the dispersion plate 120 becomes the minimum fluidization velocity Umf. The control unit 200 also adjusts the opening degrees of the second flow control valve V2 and the fourth flow control valve V4 so that the empty column velocity of the fluidizing gas supplied into the second chamber SR through the second divided space S, the fourth divided space R, and the dispersion plate 120 becomes a predetermined velocity greater than the minimum fluidization velocity Umf.

[0062] Figure 4 illustrates the flow of solid particles in the fourth operating process. In Figure 4, the white arrows indicate the flow of the fluidizing gas, and the black filled arrows indicate the flow of solid particles.

[0063] When the fourth operating process is executed, the solid particles in the first chamber FR and the solid particles in the second chamber SR become fluid. In addition, the solid particles in the first chamber FR and the solid particles in the second chamber SR are heated by the heat contained in the fluidizing gas. As a result, heat exchange occurs in the first chamber FR between the fluidized solid particles and the first fluid passing through the first heat transfer tube 170, and heat exchange occurs in the second chamber SR between the fluidized solid particles and the second fluid passing through the second heat transfer tube 180.

[0064] Furthermore, as described above, the empty velocity of the fluidizing gas supplied to the second chamber SR is greater than the empty velocity of the fluidizing gas supplied to the first chamber FR. Therefore, as shown in Figure 4, the solid particles in the second chamber SR rise within the second chamber SR, pass over the partition plate 130, and move to the first chamber FR. Also, as described above, the empty velocity of the fluidizing gas supplied to the first chamber FR is the minimum fluidization velocity Umf. Consequently, the amount of solid particles supplied from the second chamber SR to the first chamber FR is equal to the amount of solid particles that move from the first chamber FR to the second chamber SR through the space between the partition plate 130 and the dispersion plate 120. In this way, the solid particles circulate between the second chamber SR and the first chamber FR.

[0065] Furthermore, as described above, the empty velocity of the fluidizing gas supplied from the fourth divided space R into the second chamber SR is greater than the minimum fluidization velocity Umf. Therefore, the movement of solid particles from the first chamber FR to the second chamber SR can be promoted.

[0066] Furthermore, as described above, the empty velocity of the fluidizing gas supplied from the third divided space Q into the first chamber FR is smaller than the empty velocity of the fluidizing gas supplied from the fourth divided space R into the second chamber SR. Therefore, backflow of solid particles from the second chamber SR to the first chamber FR can be prevented.

[0067] Furthermore, as mentioned above, the empty velocity of the fluidizing gas supplied to the second chamber SR is greater than the empty velocity of the fluidizing gas supplied to the first chamber FR. Therefore, the solid particles in the second chamber SR are heated by the fluidizing gas more than the solid particles in the first chamber FR.

[0068] Therefore, by performing the fourth operation process, the temperature of the second fluid can be made higher than that of the first fluid.

[0069] [Fifth Operation Process] The fifth operating process involves exchanging heat between the first fluid passing through the first heat transfer tube 170 and the solid particles, and exchanging heat between the second fluid passing through the second heat transfer tube 180 and the solid particles, thereby raising the temperature of the first fluid to a higher level than the temperature of the second fluid.

[0070] In the fifth operation process, the control unit 200 operates the fluidizing gas discharge mechanism 152 and adjusts the opening degrees of the first flow control valve V1, the second flow control valve V2, the third flow control valve V3, and the fourth flow control valve V4. In this embodiment, the control unit 200 adjusts the opening degrees of the first flow control valve V1 and the third flow control valve V3 so that the empty column velocity of the fluidizing gas supplied into the first chamber FR through the first divided space P, the third divided space Q, and the dispersion plate 120 becomes a predetermined velocity greater than the minimum fluidization velocity Umf. The control unit 200 also adjusts the opening degrees of the second flow control valve V2 and the fourth flow control valve V4 so that the empty column velocity of the fluidizing gas supplied into the second chamber SR through the second divided space S, the fourth divided space R, and the dispersion plate 120 becomes the minimum fluidization velocity Umf.

[0071] Figure 5 illustrates the flow of solid particles in the fifth operating process. In Figure 5, the white arrows indicate the flow of the fluidizing gas, and the black filled arrows indicate the flow of solid particles.

[0072] When the fifth operating process is executed, the solid particles in the first chamber FR and the solid particles in the second chamber SR become fluid. In addition, the solid particles in the first chamber FR and the solid particles in the second chamber SR are heated by the heat contained in the fluidizing gas. As a result, heat exchange occurs in the first chamber FR between the fluidized solid particles and the first fluid passing through the first heat transfer tube 170, and heat exchange occurs in the second chamber SR between the fluidized solid particles and the second fluid passing through the second heat transfer tube 180.

[0073] Furthermore, as described above, the empty velocity of the fluidizing gas supplied to the first chamber FR is greater than the empty velocity of the fluidizing gas supplied to the second chamber SR. Therefore, as shown in Figure 5, the solid particles in the first chamber FR rise within the first chamber FR, pass over the partition plate 130, and move to the second chamber SR. Also, as described above, the empty velocity of the fluidizing gas supplied to the second chamber SR is the minimum fluidization velocity Umf. Consequently, the amount of solid particles supplied from the first chamber FR to the second chamber SR is equal to the amount of solid particles that move from the second chamber SR to the first chamber FR through the space between the partition plate 130 and the dispersion plate 120. In this way, the solid particles circulate between the first chamber FR and the second chamber SR.

[0074] Furthermore, as described above, the empty velocity of the fluidizing gas supplied from the third divided space Q into the first chamber FR is greater than the minimum fluidization velocity Umf. Therefore, the movement of solid particles from the second chamber SR to the first chamber FR can be promoted.

[0075] Furthermore, as described above, the empty velocity of the fluidizing gas supplied from the fourth divided space R into the second chamber SR is smaller than the empty velocity of the fluidizing gas supplied from the third divided space Q into the first chamber FR. Therefore, backflow of solid particles from the first chamber FR to the second chamber SR can be prevented.

[0076] Furthermore, as described above, the empty velocity of the fluidizing gas supplied to the first chamber FR is greater than the empty velocity of the fluidizing gas supplied to the second chamber SR. Therefore, the solid particles in the first chamber FR are heated by the fluidizing gas more than the solid particles in the second chamber SR.

[0077] Therefore, by performing the fifth operating process, the temperature of the first fluid can be made higher than that of the second fluid.

[0078] As described above, the heat exchanger 100 according to this embodiment is equipped with a first heat transfer tube 170 and a second heat transfer tube 180 in a single containment chamber AR, and the flow state of solid particles can be made different in the first chamber FR where the first heat transfer tube 170 is provided and the second chamber SR where the second heat transfer tube 180 is provided. As a result, the heat exchanger 100 can be miniaturized while exchanging heat between multiple fluids at different temperatures.

[0079] [Differentiation] In the above embodiment, an example was given in which the heat exchanger 100 is equipped with a third dividing plate 144. However, the heat exchanger 100 may be equipped without a third dividing plate 144.

[0080] Figure 6 illustrates a modified heat exchange device 300. As shown in Figure 6, the heat exchange device 300 includes a container 110, a dispersion plate 120, a partition plate 130, a first compartment plate 132, a second compartment plate 134, a first dividing plate 140, a second dividing plate 142, a fluidizing gas supply device 350, a first heat transfer tube 170, a second heat transfer tube 180, a cyclone 190, and a control unit 370. In Figure 6, solid arrows indicate fluid flow. Components that are substantially the same as those in the heat exchange device 100 are given the same reference numerals and their descriptions are omitted.

[0081] Unlike the heat exchanger 100, the heat exchanger 300 does not have a third dividing plate 144. Therefore, in the heat exchanger 300, a first divided space P (first space) is formed by the dispersion plate 120, the side SS and bottom surface of the container 110, and the first dividing plate 140. A second divided space S (second space) is formed by the dispersion plate 120, the side SS and bottom surface of the container 110, and the second dividing plate 142. A divided space T (third space) is formed by the dispersion plate 120, the bottom surface of the container 110, the first dividing plate 140, and the second dividing plate 142.

[0082] The fluidized gas supply device 350 includes a fluidized gas discharge mechanism 152, a main pipe 154, a first branch pipe 160, a first flow control valve V1, a second branch pipe 162, a second flow control valve V2, a third branch pipe 164, and a third flow control valve V3.

[0083] The third branch pipe 164 connects the main pipe 154 to the divided space T. The third flow control valve V3 is installed in the third branch pipe 164. The third flow control valve V3 changes the flow path cross-sectional area formed in the third branch pipe 164. The fluidizing gas discharge mechanism 152, the main pipe 154, the third branch pipe 164, and the third flow control valve V3 function as the third fluidizing gas supply unit.

[0084] The control unit 370 is composed of a semiconductor integrated circuit including a CPU (Central Processing Unit). The control unit 370 reads programs and parameters for operating the CPU from ROM. The control unit 370 works in cooperation with RAM, which serves as a work area, and other electronic circuits to manage and control the entire heat exchanger 300.

[0085] In the modified configuration, the control unit 370 operates the fluidizing gas discharge mechanism 152 and adjusts the opening of the first flow control valve V1 to perform the first operation process. In the first operation process, the control unit 370 adjusts the opening of the first flow control valve V1 so that the empty velocity Va of the fluidizing gas supplied into the first chamber FR through the first divided space P and the dispersion plate 120 is greater than the velocity VA. In addition, in the first operation process, the control unit 370 closes the second flow control valve V2 and the third flow control valve V3.

[0086] In the modified configuration, the control unit 370 operates the fluidizing gas discharge mechanism 152 and adjusts the opening of the second flow control valve V2 to perform the second operation process. In the second operation process, the control unit 370 adjusts the opening of the second flow control valve V2 so that the empty column velocity Vb of the fluidizing gas supplied into the second chamber SR through the second divided space S and the dispersion plate 120 is greater than the velocity VB. In addition, in the second operation process, the control unit 370 closes the first flow control valve V1 and the third flow control valve V3.

[0087] In the modified example, the control unit 370 operates the fluidizing gas discharge mechanism 152 and adjusts the openings of the first flow control valve V1, the second flow control valve V2, and the third flow control valve V3 to perform the third operation process. In the third operation process, the control unit 370 adjusts the openings of the first flow control valve V1, the second flow control valve V2, and the third flow control valve V3 so that the empty velocity of the fluidizing gas supplied into the first chamber FR through the first divided space P, the divided space T, and the dispersion plate 120, and the empty velocity of the fluidizing gas supplied into the second chamber SR through the second divided space S, the divided space T, and the dispersion plate 120, are at predetermined velocities greater than the minimum fluidization velocity Umf.

[0088] In the modified example, the control unit 370 operates the fluidizing gas discharge mechanism 152 and adjusts the openings of the first flow control valve V1, the second flow control valve V2, and the third flow control valve V3 to perform the fourth operation process. In the fourth operation process, the control unit 370 adjusts the openings of the first flow control valve V1 and the third flow control valve V3 so that the empty column velocity of the fluidizing gas supplied into the first chamber FR through the first divided space P, the divided space T, and the dispersion plate 120 becomes the minimum fluidization velocity Umf. The control unit 370 also adjusts the opening of the second flow control valve V2 so that the empty column velocity of the fluidizing gas supplied into the second chamber SR through the second divided space S and the dispersion plate 120 becomes a predetermined velocity greater than the minimum fluidization velocity Umf.

[0089] In the modified example, the control unit 370 operates the fluidizing gas discharge mechanism 152 and adjusts the openings of the first flow control valve V1, the second flow control valve V2, and the third flow control valve V3 to perform the fifth operation process. In the fifth operation process, the control unit 370 adjusts the openings of the second flow control valve V2 and the third flow control valve V3 so that the empty column velocity of the fluidizing gas supplied into the second chamber SR through the second divided space S, the divided space T, and the dispersion plate 120 becomes the minimum fluidization velocity Umf. The control unit 370 also adjusts the opening of the first flow control valve V1 so that the empty column velocity of the fluidizing gas supplied into the first chamber FR through the first divided space P and the dispersion plate 120 becomes a predetermined velocity greater than the minimum fluidization velocity Umf.

[0090] In the modified heat exchanger 300, a first heat transfer tube 170 and a second heat transfer tube 180 are provided in one containment chamber AR, and the flow state of solid particles can be made different in the first chamber FR where the first heat transfer tube 170 is provided and the second chamber SR where the second heat transfer tube 180 is provided. As a result, the heat exchanger 300 can be miniaturized while exchanging heat between multiple fluids at different temperatures.

[0091] While embodiments have been described above with reference to the attached drawings, it goes without saying that this disclosure is not limited to the embodiments described above. It will be obvious to those skilled in the art that various modifications or alterations can be conceived within the scope of the claims, and these will naturally also fall within the technical scope of this disclosure.

[0092] For example, in the above embodiment and modified examples, the control units 200 and 370 are given as cases in which they execute the first operation process, the second operation process, the third operation process, the fourth operation process, and the fifth operation process. However, the control units 200 and 370 only need to execute at least the fourth operation process or the fifth operation process.

[0093] In the above embodiments and modifications, the heat exchangers 100 and 300 are given as an example in which they include control units 200 and 370. However, the control units 200 and 370 are not essential components.

[0094] Furthermore, in the above embodiment, an example was given where the first fluid and the second fluid are different. However, the first fluid and the second fluid may be the same fluid. If the first fluid and the second fluid are the same fluid, the first inlet 172 of the first heat transfer tube 170 and the second inlet 182 of the second heat transfer tube 180 may be the same. Even in this case, however, the first outlet 174 of the first heat transfer tube 170 and the second outlet 184 of the second heat transfer tube 180 are different.

[0095] This disclosure can contribute, for example, to Sustainable Development Goal (SDG) 7, "Ensure access to affordable, reliable, sustainable and modern energy." [Explanation of Symbols]

[0096] AR containment chamber FR Room 1 SR Room 2 SS side P 1st divided space (1st space) Q 3rd divided space (3rd space, 5th space) R 4th divided space (3rd space, 4th space) S Second divided space (second space) T divided space (third space) V1 First flow control valve (first fluidized gas supply unit) V2 Second flow control valve (second fluidized gas supply section) V3 Third flow control valve (third fluidized gas supply section) V4 Fourth flow control valve (fourth fluidized gas supply section) WR Wind Box Room 100 Heat exchange equipment 110 Container 120 Dispersion plate 130 partition plates 132 First section board 134 Second Section Board 140 1st division plate 142 Second division plate 144 Third division plate 152 Fluidized Gas Discharge Mechanism (First Fluidized Gas Supply Unit, Second Fluidized Gas Supply Unit, Third Fluidized Gas Supply Unit, Fourth Fluidized Gas Supply Unit) 154 Main piping (First fluidized gas supply section, Second fluidized gas supply section, Third fluidized gas supply section, Fourth fluidized gas supply section) 160 First branch pipe (first fluidized gas supply section) 162 Second branch pipe (Second fluidized gas supply section) 164 Third branch pipe (Third fluidized gas supply section) 166. Fourth branch pipe (Fourth fluidized gas supply section) 170 No. 1 heat transfer tube 172 Entrance 1 174 Exit 1 180 No. 2 heat transfer tube 182 Entrance 2 184 2nd exit 200 Control Unit 300 Heat exchange equipment 370 Control Unit

Claims

1. Container and A dispersion plate having multiple holes is provided within the container, extending horizontally and dividing the inside of the container into a containment chamber for containing solid particles and a wind chamber provided below the containment chamber, A partition plate that is separated from the upper surface of the containment chamber and the distribution plate, extends vertically, and divides the containment chamber into a first chamber and a second chamber, A first partition plate is erected above the portion of the distribution plate located in the first chamber, and its upper end is located above the lower end of the partition plate. A second partition plate is erected above the portion of the distribution plate located in the second chamber, with its upper end positioned above the lower end of the partition plate, A first dividing plate is provided in the wind box chamber at a position corresponding to the first partition plate, extending vertically and dividing the wind box chamber, A second dividing plate is provided in the wind box chamber at a position corresponding to the second partition plate, extending vertically and dividing the wind box chamber, A first fluidizing gas supply unit supplies fluidizing gas to a first space formed between the side surface of the container and the first dividing plate in the wind chamber, A second fluidizing gas supply unit supplies the fluidizing gas to a second space formed between the side surface of the container and the second dividing plate in the wind chamber, A third fluidizing gas supply unit supplies the fluidizing gas to a third space formed between the first dividing plate and the second dividing plate in the wind chamber, A first heat transfer tube having a first inlet and a first outlet, with at least a portion facing the first chamber, through which a first fluid passes; A second heat transfer tube has a second inlet and a second outlet different from the first outlet, at least a portion of which faces the second chamber, and through which the second fluid passes; A heat exchanger equipped with the following features.

2. The system comprises a control unit that controls the first fluidizing gas supply unit, the second fluidizing gas supply unit, and the third fluidizing gas supply unit. The control unit, The empty velocity of the fluidizing gas supplied by the first fluidizing gas supply unit is made greater than the minimum fluidizing velocity. The heat exchange apparatus according to claim 1, wherein the empty velocity of the fluidizing gas supplied by the second fluidizing gas supply unit and the third fluidizing gas supply unit is set as the minimum fluidizing velocity.

3. The system comprises a control unit that controls the first fluidizing gas supply unit, the second fluidizing gas supply unit, and the third fluidizing gas supply unit. The control unit, The empty velocity of the fluidizing gas supplied by the first fluidizing gas supply unit is made greater than a predetermined velocity that exceeds the minimum fluidizing velocity. The heat exchange apparatus according to claim 1, wherein the operation of the second fluidizing gas supply unit and the third fluidizing gas supply unit is stopped.

4. The heat exchange apparatus according to claim 1, further comprising a control unit that increases the empty tower velocity of the fluidizing gas supplied by the first fluidizing gas supply unit, the second fluidizing gas supply unit, and the third fluidizing gas supply unit to a minimum fluidizing velocity.

5. A third dividing plate is provided between the first dividing plate and the second dividing plate within the wind box chamber, extending vertically and dividing the third space, A fourth fluidizing gas supply unit supplies the fluidizing gas to the fourth space formed between the second dividing plate and the third dividing plate in the wind chamber, Equipped with, The third fluidized gas supply unit is, The heat exchange apparatus according to claim 1, wherein the fluidizing gas is supplied to a fifth space formed between the first dividing plate and the third dividing plate in the wind chamber.

6. The system comprises a control unit that controls the first fluidizing gas supply unit, the second fluidizing gas supply unit, the third fluidizing gas supply unit, and the fourth fluidizing gas supply unit. The control unit, The empty velocity of the fluidizing gas supplied by the first fluidizing gas supply unit and the third fluidizing gas supply unit is made greater than the minimum fluidizing velocity. The heat exchange apparatus according to claim 5, wherein the empty velocity of the fluidizing gas supplied by the second fluidizing gas supply unit and the fourth fluidizing gas supply unit is set as the minimum fluidizing velocity.

7. The system comprises a control unit that controls the first fluidizing gas supply unit, the second fluidizing gas supply unit, the third fluidizing gas supply unit, and the fourth fluidizing gas supply unit. The control unit, The empty velocity of the fluidizing gas supplied by the first fluidizing gas supply unit is made greater than a predetermined velocity that exceeds the minimum fluidizing velocity. The heat exchange apparatus according to claim 5, wherein the operation of the second fluidizing gas supply unit, the third fluidizing gas supply unit, and the fourth fluidizing gas supply unit is stopped.

8. The heat exchange apparatus according to claim 5, further comprising a control unit that increases the empty tower velocity of the fluidizing gas supplied by the first fluidizing gas supply unit, the second fluidizing gas supply unit, the third fluidizing gas supply unit, and the fourth fluidizing gas supply unit to a minimum fluidizing velocity.

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