JP2024004152A - Heat exchange device - Google Patents

Abstract

PROBLEM TO BE SOLVED: 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

COPYRIGHT: (C)2024,JPO&INPIT

Description

The present disclosure relates to a heat exchange device.

Conventionally, a circulating fluidized bed boiler including a fluidized bed furnace, a convection heat transfer section, an air preheater, and an external heat exchanger has been developed (for example, Patent Document 1). A fluidized bed furnace fluidizes fluidized sand using air and heats the fluidized sand by burning fuel. The convection heat transfer section is a heat exchanger that exchanges heat between the flue gas exhausted from the fluidized bed furnace and water. The air preheater is a heat exchanger that is provided after the convection heat transfer section and 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 fluidized sand heated in a fluidized bed furnace and water.

Patent No. 6995603

In the technique of separately providing a plurality of heat exchangers as in Patent Document 1, each heat exchanger has a first flow path through which the fluid to be heat exchanged passes, and a first flow path within the first flow path. and a second flow path through which the fluid to be heat exchanged passes. For this reason, there is a problem in that the plurality of heat exchangers as a whole become larger and the cost required for heat exchange increases.

In view of such problems, the present disclosure aims to provide a heat exchange device that can be downsized.

In order to solve the above problems, a heat exchange device according to one aspect of the present disclosure includes a container, a storage chamber provided in the container and extending in the horizontal direction, and accommodating solid particles, and a lower part of the storage chamber. a dispersion plate with a plurality of holes formed therein, which divides the inside of the container into a wind box chamber provided in the first chamber; a partition plate that divides the distribution plate into a second chamber; a first partition plate that stands above the portion of the distribution plate located in the first chamber, and whose upper end is located above the lower end of the partition plate; A second partition board is installed upward from the part of the board located in the second chamber, and the upper end is located above the bottom end of the partition plate, and a second partition board is installed at a position corresponding to the first partition board in the wind box room. The first dividing plate extends vertically and divides the inside of the wind box, and the second partition plate inside the wind box is provided at a position corresponding to the first dividing plate that extends in the vertical direction and divides the inside of the wind box. A first fluidizing gas supply unit that supplies fluidizing gas to a first space formed between the side surface of the container in the wind box chamber 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 and the second dividing plate, and between the first dividing plate and the second dividing plate in the wind box chamber. a third fluidizing gas supply unit that supplies fluidizing gas to a third space formed in the third space; a first inlet; and a first outlet; a second heat exchanger tube having a second inlet and a second outlet different from the first outlet, at least a part of which faces into the second chamber, and through which the second fluid passes. .

Further, the heat exchange device includes a control unit that controls the first fluidization gas supply unit, the second fluidization gas supply unit, and the third fluidization gas supply unit, and the control unit includes the first fluidization gas supply unit, the second fluidization gas supply unit, and the third fluidization gas supply unit. The superficial velocity of the fluidizing gas supplied by the supply section is greater than the minimum fluidization velocity, and the superficial velocity of the fluidizing gas supplied by the second fluidizing gas supply section and the third fluidizing gas supply section may be taken as the minimum fluidization speed.

Further, the heat exchange device includes a control unit that controls the first fluidization gas supply unit, the second fluidization gas supply unit, and the third fluidization gas supply unit, and the control unit includes the first fluidization gas supply unit, the second fluidization gas supply unit, and the third fluidization gas supply unit. Even if the superficial velocity of the fluidizing gas supplied by the supply section is made higher than a predetermined velocity exceeding the minimum fluidization velocity, and the operation of the second fluidizing gas supply section and the third fluidizing gas supply section is stopped. good.

Further, the heat exchange device is configured such that the superficial velocity of the fluidizing gas supplied by the first fluidizing gas supply section, the second fluidizing gas supply section, and the third fluidizing gas supply section is lower than the minimum fluidization velocity. A control unit for increasing the size may be provided.

The heat exchange device also includes a third dividing plate that is provided between the first dividing plate and the second dividing plate in the wind box chamber, extends in the vertical direction and divides the third space, and a third dividing plate that divides the third space. a fourth fluidizing gas supply unit that supplies fluidizing gas to a fourth space formed between the second dividing plate and the third dividing plate in the chamber, and the third fluidizing gas supply unit The fluidizing gas may be supplied to a fifth space formed between the first dividing plate and the third dividing plate in the box chamber.

The heat exchange device also includes a control unit that controls the first fluidizing gas supply unit, the second fluidization gas supply unit, the third fluidization gas supply unit, and the fourth fluidization gas supply unit, and The section makes the superficial velocity of the fluidizing gas supplied by the first fluidizing gas supply section and the fourth fluidizing gas supply section larger than the minimum fluidization velocity, the second fluidizing gas supply section, and The superficial velocity of the fluidizing gas supplied by the third fluidizing gas supply section may be the minimum fluidizing velocity.

Further, the heat exchange device includes a control unit that controls a first fluidizing gas supply section, a second fluidization gas supply section, a third fluidization gas supply section, and a fourth fluidization gas supply section, and The section increases the superficial velocity of the fluidizing gas supplied by the first fluidizing gas supply section to be higher than a predetermined velocity exceeding the minimum fluidization speed, and the second fluidizing gas supply section, the third fluidizing gas supply section, Additionally, the operation of the fourth fluidizing gas supply section may be stopped.

The heat exchange device also includes a first fluidizing gas supply section, a second fluidizing gas supply section, a third fluidizing gas supply section, and a fourth fluidizing gas supply section. A controller may be provided to increase the column speed above the minimum fluidization speed.

According to the present disclosure, it is possible to downsize the device.

FIG. 1 is a diagram illustrating a heat exchange device according to this embodiment. FIG. 2 is a top view of a cross section taken along line II-II in FIG. FIG. 3 is a horizontal sectional view of the wind box chamber. FIG. 4 is a diagram illustrating the flow of solid particles in the fourth operational process. FIG. 5 is a diagram illustrating the flow of solid particles in the fifth operational process. FIG. 6 is a diagram illustrating a heat exchange device according to a modification.

Embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in the embodiments are merely examples for easy understanding, and do not limit the present disclosure unless otherwise specified. Note that, in this specification and the drawings, elements having substantially the same functions and configurations are designated by the same reference numerals and redundant explanation will be omitted. Further, illustrations of elements not directly related to the present disclosure are omitted.

[Heat exchange device 100]
FIG. 1 is a diagram illustrating a heat exchange device 100 according to this embodiment. FIG. 2 is a top view of a cross section taken along line II-II in FIG. FIG. 3 is a horizontal sectional view of the wind box chamber WR. In addition, in FIG. 2, the description of the first heat exchanger tube 170, the second heat exchanger tube 180, the cyclone 190, and the solid particles is omitted for easy understanding.

As shown in FIG. 1, the heat exchange device 100 includes a container 110, a distribution plate 120, a partition plate 130, a first partition plate 132, a second partition plate 134, a first partition plate 140, and a second partition plate 130. It includes a dividing plate 142, a third dividing plate 144, a fluidizing gas supply device 150, a first heat exchanger tube 170, a second heat exchanger tube 180, a cyclone 190, and a control section 200. Note that in FIG. 1, solid arrows indicate fluid flow.

The container 110 has, for example, a rectangular tube shape. In this embodiment, an exhaust port 112 is formed on the top surface TS of the container 110.

Dispersion plate 120 is provided within 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 distribution plate 120. The size of the plurality of pores is such that solid particles, which will be described later, cannot pass through or have difficulty passing through.

The storage chamber AR is formed in the upper part of the container 110. Solid particles are accommodated in the accommodation chamber AR. Dispersion plate 120 functions as a bottom surface of storage chamber AR.

Solid particles are, for example, silica, alumina, barite sand (barite, barium sulfate), partially calcined clay, glass spheres, recovered petroleum catalyst, etc. The solid particles are preferably silica and/or alumina. When the solid particles are made of silica, the cost required for the solid particles can be reduced. Further, by using desert sand or river sand as the solid particles (silica), it becomes possible to obtain it easily at low cost. Furthermore, by using alumina, which has a relatively high melting point, as the solid particles, the solid particles can be heated to a high temperature, and a higher energy storage density can be achieved.

The solid particles are particles with a particle size of 0.01 mm or more and 10 mm or less. The shape of the solid particles is not limited, and may be spherical or non-spherical.

The wind box chamber WR is formed below the storage chamber AR in the container 110.

The partition plate 130 is provided within the storage room AR. The partition plate 130 is a plate extending in the vertical direction. The upper end of the partition plate 130 is separated from the upper surface of the storage 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 accommodation chamber AR).

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

Returning to FIG. 1, the first partition plate 132 is a plate that stands upward from the bottom surface of the first chamber FR in the storage chamber AR (the part 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.

The second partition plate 134 is a plate that stands upward from the bottom surface of the second chamber SR in the storage room AR (the part 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.

As shown in FIG. 2, both ends of the first partition plate 132 in the horizontal direction are connected to the side surface SS of the container 110. Similarly, both ends of the second partition plate 134 in the horizontal direction are connected to the side surface SS of the container 110.

Returning to FIG. 1, the first dividing plate 140, the second dividing plate 142, and the third dividing plate 144 are provided in the wind box chamber WR. The space inside the wind box chamber WR is divided into four by the first dividing plate 140, the second dividing plate 142, and the third dividing plate 144.

The first dividing plate 140 is provided at a position corresponding to the first dividing plate 132 in the wind box chamber WR. The first dividing plate 140 is a plate extending in the vertical direction. The upper end of the first dividing plate 140 is connected to the upper surface (distribution plate 120) of the wind box chamber WR. The lower end of the first dividing plate 140 is connected to the bottom surface of the wind chamber WR (the bottom surface of the container 110).

The second dividing plate 142 is provided at a position corresponding to the second dividing plate 134 in the wind box chamber WR. The second dividing plate 142 is a plate extending in the vertical direction. The upper end of the second dividing plate 142 is connected to the upper surface of the wind box chamber WR. The lower end of the second dividing plate 142 is connected to the bottom surface of the wind box chamber WR.

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

As shown in FIG. 3, both ends of the first dividing plate 140 in the horizontal direction are connected to the side surface SS of the container 110. Similarly, both ends of the second dividing plate 142 in the horizontal direction are connected to the side surface SS of the container 110. Further, both ends of the third dividing plate 144 in the horizontal direction are connected to the side surface SS of the container 110.

Therefore, the first divided space P (first space) is formed by the dispersion plate 120, the side surface SS and bottom surface of the container 110, and the first dividing plate 140. Further, a second divided space S (second space) is formed by the dispersion plate 120, the side surface SS and bottom surface of the container 110, and the second dividing plate 142. A third divided space Q (fifth space) is formed by the distribution plate 120, the bottom surface of the container 110, the first dividing plate 140, and the third dividing plate 144. Further, a fourth divided space R (fourth space) is formed by the dispersion plate 120, the bottom surface of the container 110, the second dividing plate 142, and the third dividing plate 144.

Returning to FIG. 1, the fluidizing gas supply device 150 supplies fluidizing gas to the wind box chamber WR. The fluidizing gas is, for example, air, combustion exhaust gas, or the like. The fluidizing gas supply device 150 includes a fluidizing gas discharge mechanism 152, a main pipe 154, a first branch pipe 160, a first flow rate adjustment valve V1, a second branch pipe 162, and a second flow rate adjustment valve V2. , a third branch pipe 164, a third flow rate adjustment valve V3, a fourth branch pipe 166, and a fourth flow rate adjustment valve V4.

The fluidizing gas discharge mechanism 152 is, for example, a pump, a blower, or the like. The suction side of the fluidizing gas discharge mechanism 152 is connected to a supply source of high temperature fluidizing gas. A main pipe 154 is connected to the discharge side of the fluidizing gas discharge mechanism 152 .

The first branch pipe 160 connects the main pipe 154 and the first divided space P. The first flow rate regulating valve V1 is provided in the first branch pipe 160. The first flow rate adjustment valve V1 changes the cross-sectional area of the flow path 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 rate adjustment valve V1 function as a first fluidizing gas supply section.

The second branch pipe 162 connects the main pipe 154 and the second divided space S. The second flow rate regulating valve V2 is provided in the second branch pipe 162. The second flow rate adjustment valve V2 changes the cross-sectional area of the flow path formed in the second branch pipe 162. The fluidizing gas discharge mechanism 152, the main pipe 154, the second branch pipe 162, and the second flow rate regulating valve V2 function as a second fluidizing gas supply section.

The third branch pipe 164 connects the main pipe 154 and the third divided space Q. The third flow rate regulating valve V3 is provided in the third branch pipe 164. The third flow rate adjustment valve V3 changes the cross-sectional area of the flow path 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 rate adjustment valve V3 function as a third fluidizing gas supply section.

The fourth branch pipe 166 connects the main pipe 154 and the fourth divided space R. The fourth flow rate regulating valve V4 is provided in the fourth branch pipe 166. The fourth flow rate adjustment valve V4 changes the cross-sectional area of the flow path 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 rate adjustment valve V4 function as a fourth fluidizing gas supply section.

A portion of the first heat exchanger tube 170 faces into the first chamber FR. The first heat transfer tube 170 has a first inlet 172 and a first outlet 174. A first inlet 172 and a first outlet 174 are provided outside the container 110. A first fluid is supplied to the first heat exchanger tube 170 through the first inlet 172 , and the first fluid is discharged from the first heat exchanger tube 170 through the first outlet 174 . As a result, the first fluid passes through the first heat exchanger tube 170.

A portion of the second heat exchanger tube 180 faces into the second chamber SR. The second heat transfer tube 180 is formed with a second inlet 182 and a second outlet 184 . A second inlet 182 and a second outlet 184 are provided outside the container 110. The second fluid is supplied to the second heat exchanger tube 180 through the second inlet 182 , and the second fluid is discharged from the second heat exchanger tube 180 through the second outlet 184 . As a result, the second fluid passes through the second heat exchanger tube 180.

Note that in this embodiment, the first inlet 172 and the second inlet 182 are different, and the first outlet 174 and the second outlet 184 are different. Furthermore, in this embodiment, the first fluid and the second fluid are different fluids. The first fluid is, for example, water (steam). The second fluid is, for example, air.

The cyclone 190 separates the solid-gas mixture exhausted from the exhaust port 112 of the container 110 into solid-gas mixture. The solid-gas mixture includes solid particles and a fluidizing gas. The fluidized gas separated by the cyclone 190 is exhausted to the outside. Further, the solid particles separated by the cyclone 190 are returned to the storage chamber AR.

The control unit 200 is composed of a semiconductor integrated circuit including a CPU (central processing unit). The control unit 200 reads programs, parameters, etc. for operating the CPU from the ROM. The control unit 200 manages and controls the entire heat exchange device 100 in cooperation with the RAM as a work area and other electronic circuits.

In this embodiment, the control unit 200 controls the fluidizing gas supply device 150. The control unit 200 switches the operation mode of the heat exchange device 100 to one of the first operation process, the second operation process, the third operation process, the fourth operation process, and the fifth operation process. Each driving process will be explained below.

[First operation process]
The first operation process is a process of exchanging heat between the first fluid passing through the first heat exchanger tube 170 and the solid particles, and stopping heat exchange between the second fluid passing through the second heat exchanger tube 180 and the solid particles. .

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 rate regulating valve V1. In the present embodiment, the control unit 200 controls the first divided space P and the superficial velocity Va of the fluidizing gas supplied into the first chamber FR through the distribution plate 120 to a predetermined value exceeding the minimum fluidization velocity Umf. The opening degree of the first flow rate regulating valve V1 is adjusted so that the velocity is greater than the velocity VA. The speed VA is expressed by the following formula (1).
VA = Umf×(Horizontal cross-sectional area of first divided space P + horizontal cross-sectional area of third divided space Q)/(horizontal cross-sectional area of first divided space P) Formula (1)

Further, in the first operation process, the control unit 200 closes the second flow rate adjustment valve V2, the third flow rate adjustment valve V3, and the fourth flow rate adjustment valve V4.

When the first operation process is executed, the solid particles in the first chamber FR are fluidized. Moreover, the solid particles in the first chamber FR are heated by the heat contained in the fluidizing gas. Thereby, heat exchange is performed between the fluidized solid particles and the first fluid passing through the first heat exchanger tube 170. Further, since the supply of fluidizing gas to the second chamber SR is stopped, the solid particles in the second chamber SR are not 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, heat exchange with the second fluid passing through the second heat exchanger tube 180 is not performed.

[Second operation process]
The second operation process is a process of exchanging heat between the second fluid passing through the second heat exchanger tube 180 and the solid particles, and stopping heat exchange between the first fluid passing through the first heat exchanger tube 170 and the solid particles. .

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 rate regulating valve V2. In the present embodiment, the control unit 200 controls the second divided space S and the superficial velocity Vb of the fluidizing gas supplied into the second chamber SR through the distribution plate 120 to a predetermined value exceeding the minimum fluidization velocity Umf. The opening degree of the second flow rate regulating valve V2 is adjusted so that the velocity is greater than the velocity VB. The speed VB is expressed by the following formula (2).
VB = Umf x (horizontal cross-sectional area of second divided space S + horizontal cross-sectional area of fourth divided space R) / (horizontal cross-sectional area of second divided space S) Formula (2)

Further, in the second operation process, the control unit 200 closes the first flow rate adjustment valve V1, the third flow rate adjustment valve V3, and the fourth flow rate adjustment valve V4.

When the second operation process is executed, the solid particles in the second chamber SR are fluidized. Moreover, the solid particles in the second chamber SR are heated by the heat contained in the fluidizing gas. Thereby, heat exchange is performed between the fluidized solid particles and the second fluid passing through the second heat exchanger tube 180. Further, since the supply of fluidizing gas to the first chamber FR is stopped, the solid particles in the first chamber FR are not 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, heat exchange with the first fluid passing through the first heat exchanger tube 170 is not performed.

[Third operation process]
The third operation process involves exchanging heat between the first fluid passing through the first heat exchanger tube 170 and the solid particles, exchanging heat between the second fluid passing through the second heat exchanger tube 180 and the solid particles, and exchanging heat between the first fluid and the solid particles passing through the second heat exchanger tube 180. This is a process of substantially equalizing the temperature of the second fluid.

In the third operation process, the control unit 200 operates the fluidizing gas discharge mechanism 152, and controls the first flow rate adjustment valve V1, the second flow rate adjustment valve V2, the third flow rate adjustment valve V3, and the fourth flow rate adjustment valve V4. Adjust the opening. In the present embodiment, the control unit 200 controls the superficial velocity of the fluidizing gas supplied into the first chamber FR through the first divided space P, the third divided space Q, and the distribution plate 120, and the second divided space Q. The first flow rate is adjusted such that the superficial velocity of the fluidizing gas supplied into the second chamber SR through the space S, the fourth divided space R, and the distribution plate 120 is a predetermined velocity greater than the minimum fluidization velocity Umf. The opening degrees of the regulating valve V1, the second flow regulating valve V2, the third flow regulating valve V3, and the fourth flow regulating valve V4 are adjusted.

When the third operation process is executed, the solid particles in the first chamber FR and the solid particles in the second chamber SR are fluidized. Moreover, the solid particles in the first chamber FR and the solid particles in the second chamber SR are heated by the heat possessed by the fluidizing gas. Thereby, in the first chamber FR, heat exchange is performed between the fluidized solid particles and the first fluid passing through the first heat transfer tube 170, and in the second chamber SR, the fluidized solid particles are exchanged with the first fluid passing through the first heat transfer tube 170. Heat exchange occurs between the solid particles and the second fluid passing through the second heat transfer tube 180.

Further, the control unit 200 substantially equalizes the superficial velocity of the fluidizing gas supplied into the first chamber FR and the superficial velocity of the fluidizing gas supplied into the second chamber SR. Thereby, the solid particles in the first chamber FR and the solid particles in the second chamber SR can be heated substantially equally. Moreover, the solid particles in the first chamber FR and the solid particles in the second chamber SR can be fluidized substantially equally. Therefore, by executing the third operation process, the temperatures of the first fluid and the second fluid can be made substantially equal.

[Fourth operation process]
The fourth operation process involves exchanging heat between the first fluid passing through the first heat exchanger tube 170 and the solid particles, exchanging heat between the second fluid passing through the second heat exchanger tube 180 and the solid particles, and exchanging heat between the second fluid passing through the second heat exchanger tube 180 and the solid particles. This is a process in which the temperature is made higher than the temperature of the first fluid.

In the fourth operation process, the control unit 200 operates the fluidizing gas discharge mechanism 152, and controls the first flow rate adjustment valve V1, the second flow rate adjustment valve V2, the third flow rate adjustment valve V3, and the fourth flow rate adjustment valve V4. Adjust the opening. In the present embodiment, the control unit 200 determines that the superficial velocity of the fluidizing gas supplied into the first chamber FR through the first divided space P, the third divided space Q, and the distribution plate 120 is the minimum fluidization velocity Umf. The opening degrees of the first flow rate regulating valve V1 and the third flow rate regulating valve V3 are adjusted so that. Further, the control unit 200 controls the second divided space S, the fourth divided space R, and a predetermined superficial velocity of the fluidizing gas supplied into the second chamber SR through the distribution plate 120 to be higher than the minimum fluidizing velocity Umf. The opening degrees of the second flow rate adjustment valve V2 and the fourth flow rate adjustment valve V4 are adjusted so that the speed becomes .

FIG. 4 is a diagram illustrating the flow of solid particles in the fourth operational process. Note that in FIG. 4, the white arrows indicate the flow of the fluidizing gas. Moreover, in FIG. 4, black filled arrows indicate the flow of solid particles.

When the fourth operation process is executed, the solid particles in the first chamber FR and the solid particles in the second chamber SR are fluidized. Moreover, the solid particles in the first chamber FR and the solid particles in the second chamber SR are heated by the heat possessed by the fluidizing gas. Thereby, in the first chamber FR, heat exchange is performed between the fluidized solid particles and the first fluid passing through the first heat transfer tube 170, and in the second chamber SR, the fluidized solid particles are exchanged with the first fluid passing through the first heat transfer tube 170. Heat exchange occurs between the solid particles and the second fluid passing through the second heat transfer tube 180.

Furthermore, as described above, the superficial velocity of the fluidizing gas supplied into the second chamber SR is greater than the superficial velocity of the fluidizing gas supplied into the first chamber FR. Therefore, as shown in FIG. 4, the solid particles in the second chamber SR rise within the second chamber SR, cross the partition plate 130, and move to the first chamber FR. Furthermore, as described above, the superficial velocity of the fluidizing gas supplied into the first chamber FR is the minimum fluidizing velocity Umf. Therefore, solid particles move from the first chamber FR to the second chamber SR through the space between the partition plate 130 and the dispersion plate 120 by the amount of solid particles supplied from the second chamber SR to the first chamber FR. In this way, the solid particles circulate between the second chamber SR and the first chamber FR.

Further, as described above, the superficial velocity of the fluidizing gas supplied from the fourth divided space R into the second chamber SR is higher than the minimum fluidizing velocity Umf. Therefore, the movement of solid particles from the first chamber FR to the second chamber SR can be promoted.

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

Furthermore, as described above, the superficial velocity of the fluidizing gas supplied into the second chamber SR is greater than the superficial velocity of the fluidizing gas supplied into 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.

Therefore, by executing the fourth operation process, the temperature of the second fluid can be made higher than that of the first fluid.

[Fifth operation process]
The fifth operation process is to exchange heat between the first fluid passing through the first heat transfer tube 170 and the solid particles, to exchange heat between the second fluid passing through the second heat transfer tube 180 and the solid particles, and to exchange heat between the first fluid passing through the first heat transfer tube 170 and the solid particles. This is a process in which the temperature is made higher than the temperature of the second fluid.

In the fifth operation process, the control unit 200 operates the fluidizing gas discharge mechanism 152, and controls the first flow rate adjustment valve V1, the second flow rate adjustment valve V2, the third flow rate adjustment valve V3, and the fourth flow rate adjustment valve V4. Adjust the opening. In the present embodiment, the control unit 200 determines that the superficial velocity of the fluidizing gas supplied into the first chamber FR through the first divided space P, the third divided space Q, and the distribution plate 120 is the minimum fluidization velocity Umf. The opening degrees of the first flow rate regulating valve V1 and the third flow rate regulating valve V3 are adjusted so as to achieve a higher predetermined speed. The control unit 200 also controls the superficial velocity of the fluidizing gas supplied into the second chamber SR through the second divided space S, the fourth divided space R, and the distribution plate 120 to be the minimum fluidization velocity Umf. Then, the opening degrees of the second flow rate regulating valve V2 and the fourth flow rate regulating valve V4 are adjusted.

FIG. 5 is a diagram illustrating the flow of solid particles in the fifth operational process. Note that in FIG. 5, the white arrows indicate the flow of the fluidizing gas. Moreover, in FIG. 5, black filled arrows indicate the flow of solid particles.

When the fifth operation process is executed, the solid particles in the first chamber FR and the solid particles in the second chamber SR are fluidized. Moreover, the solid particles in the first chamber FR and the solid particles in the second chamber SR are heated by the heat possessed by the fluidizing gas. Thereby, in the first chamber FR, heat exchange is performed between the fluidized solid particles and the first fluid passing through the first heat transfer tube 170, and in the second chamber SR, the fluidized solid particles are exchanged with the first fluid passing through the first heat transfer tube 170. Heat exchange occurs between the solid particles and the second fluid passing through the second heat transfer tube 180.

Furthermore, as described above, the superficial velocity of the fluidizing gas supplied into the first chamber FR is greater than the superficial velocity of the fluidizing gas supplied into the second chamber SR. Therefore, as shown in FIG. 5, the solid particles in the first chamber FR rise within the first chamber FR, cross the partition plate 130, and move to the second chamber SR. Furthermore, as described above, the superficial velocity of the fluidizing gas supplied into the second chamber SR is the minimum fluidizing velocity Umf. Therefore, the solid particles that are supplied from the first chamber FR to the second chamber SR move from the second chamber SR to the first chamber FR through 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.

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

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

Furthermore, as described above, the superficial velocity of the fluidizing gas supplied into the first chamber FR is greater than the superficial velocity of the fluidizing gas supplied into 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.

Therefore, by executing the fifth operation process, the temperature of the first fluid can be made higher than that of the second fluid.

As explained above, the heat exchange device 100 according to the present embodiment includes the first heat exchanger tube 170 and the second heat exchanger tube 180 in one storage chamber AR, and the first heat exchanger tube 170 is provided with the first heat exchanger tube 170. The flow state of the solid particles can be made different between the chamber FR and the second chamber SR in which the second heat transfer tube 180 is provided. Thereby, the heat exchange device 100 can be downsized while exchanging heat between a plurality of fluids at different temperatures.

[Modified example]
In the embodiment described above, the case where the heat exchange device 100 includes the third dividing plate 144 was exemplified. However, the heat exchange device 100 may not include the third dividing plate 144.

FIG. 6 is a diagram illustrating a heat exchange device 300 according to a modification. As shown in FIG. 6, the heat exchange device 300 includes a container 110, a distribution plate 120, a partition plate 130, a first partition plate 132, a second partition plate 134, a first partition plate 140, and a second partition plate 130. It includes a dividing plate 142 , a fluidizing gas supply device 350 , a first heat exchanger tube 170 , a second heat exchanger tube 180 , a cyclone 190 , and a control section 370 . Note that in FIG. 6, solid arrows indicate fluid flow. Furthermore, components that are substantially the same as those of the heat exchanger 100 are given the same reference numerals and description thereof will be omitted.

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

The fluidizing gas supply device 350 includes a fluidizing gas discharge mechanism 152, a main pipe 154, a first branch pipe 160, a first flow rate adjustment valve V1, a second branch pipe 162, and a second flow rate adjustment valve V2. , a third branch pipe 164, and a third flow rate regulating valve V3.

The third branch pipe 164 connects the main pipe 154 and the divided space T. The third flow rate regulating valve V3 is provided in the third branch pipe 164. The third flow rate adjustment valve V3 changes the cross-sectional area of the flow path 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 rate adjustment valve V3 function as a third fluidizing gas supply section.

The control unit 370 is composed of a semiconductor integrated circuit including a CPU (central processing unit). The control unit 370 reads programs, parameters, etc. for operating the CPU from the ROM. The control unit 370 manages and controls the entire heat exchange device 300 in cooperation with the RAM as a work area and other electronic circuits.

In the modification, the control unit 370 operates the fluidizing gas discharge mechanism 152, adjusts the opening degree of the first flow rate regulating valve V1, and executes the first operation process. In the first operation process, the control unit 370 controls the superficial velocity Va of the fluidizing gas supplied into the first chamber FR through the first divided space P and the distribution plate 120 to be larger than the velocity VA. , adjusts the opening degree of the first flow rate regulating valve V1. Further, in the first operation process, the control unit 370 closes the second flow rate adjustment valve V2 and the third flow rate adjustment valve V3.

In the modified example, the control unit 370 operates the fluidizing gas discharge mechanism 152, adjusts the opening degree of the second flow rate regulating valve V2, and executes the second operation process. In the second operation process, the control unit 370 controls the superficial velocity Vb of the fluidizing gas supplied into the second chamber SR through the second divided space S and the distribution plate 120 to be larger than the velocity VB. , adjusts the opening degree of the second flow rate regulating valve V2. Further, in the second operation process, the control unit 370 closes the first flow rate adjustment valve V1 and the third flow rate adjustment valve V3.

In the modified example, the control unit 370 operates the fluidizing gas discharge mechanism 152, adjusts the opening degrees of the first flow rate adjustment valve V1, the second flow rate adjustment valve V2, and the third flow rate adjustment valve V3, and 3 Execute the driving process. In the third operation process, the control unit 370 controls the superficial velocity of the fluidizing gas supplied into the first chamber FR through the first divided space P, the divided space T, and the distribution plate 120, and the second divided space. S, the divided space T, and the first flow rate regulating valve V1 so that the superficial velocity of the fluidizing gas supplied into the second chamber SR through the distribution plate 120 becomes a predetermined velocity higher than the minimum fluidizing velocity Umf. , the opening degrees of the second flow rate regulating valve V2, and the third flow rate regulating valve V3 are adjusted.

In the modified example, the control unit 370 operates the fluidizing gas discharge mechanism 152, adjusts the opening degrees of the first flow rate adjustment valve V1, the second flow rate adjustment valve V2, and the third flow rate adjustment valve V3, and 4 Execute the driving process. In the fourth operation process, the control unit 370 determines that the superficial velocity of the fluidizing gas supplied into the first chamber FR through the first divided space P, the divided space T, and the distribution plate 120 is the minimum fluidizing velocity Umf. The opening degrees of the first flow rate regulating valve V1 and the third flow rate regulating valve V3 are adjusted so that Further, the control unit 370 controls the superficial velocity of the fluidizing gas supplied into the second chamber SR through the second divided space S and the distribution plate 120 to a predetermined velocity higher than the minimum fluidization velocity Umf. , adjusts the opening degree of the second flow rate regulating valve V2.

In the modified example, the control unit 370 operates the fluidizing gas discharge mechanism 152, adjusts the opening degrees of the first flow rate adjustment valve V1, the second flow rate adjustment valve V2, and the third flow rate adjustment valve V3, and 5 Execute the driving process. In the fifth operation process, the control unit 370 determines that the superficial velocity of the fluidizing gas supplied into the second chamber SR through the second divided space S, the divided space T, and the distribution plate 120 is the minimum fluidized velocity Umf. The opening degrees of the second flow rate regulating valve V2 and the third flow rate regulating valve V3 are adjusted so that Further, the control unit 370 controls the superficial velocity of the fluidizing gas supplied into the first chamber FR through the first divided space P and the distribution plate 120 to a predetermined velocity higher than the minimum fluidization velocity Umf. , adjusts the opening degree of the first flow rate regulating valve V1.

The heat exchange device 300 according to the modified example also includes the first heat exchanger tube 170 and the second heat exchanger tube 180 in one accommodation chamber AR, and the first chamber FR in which the first heat exchanger tube 170 is provided and the second heat exchanger tube 180 are provided. The flow state of the solid particles can be made different in the second chamber SR in which the heat exchanger tube 180 is provided. Thereby, the heat exchange device 300 can be downsized while exchanging heat between a plurality of fluids at different temperatures.

Although the embodiments have been described above with reference to the accompanying drawings, it goes without saying that the present disclosure is not limited to the above embodiments. It is clear that those skilled in the art can come up with various changes and modifications within the scope of the claims, and it is understood that these naturally fall within the technical scope of the present disclosure. be done.

For example, in the above embodiments and modifications, the case where the control units 200 and 370 execute the first operation process, the second operation process, the third operation process, the fourth operation process, and the fifth operation process is taken as an example. I mentioned it. However, the control units 200 and 370 may execute at least the fourth operation process or the fifth operation process.

In the embodiments and modifications described above, the heat exchange apparatuses 100 and 300 are each provided with the control units 200 and 370, as an example. However, the control units 200 and 370 are not essential components.

Furthermore, in the above embodiments, the case where the first fluid and the second fluid are different has been exemplified. However, the first fluid and the second fluid may be the same fluid. When the first fluid and the second fluid are the same fluid, the first inlet 172 of the first heat exchanger tube 170 and the second inlet 182 of the second heat exchanger tube 180 may be the same. Note that even in this case, the first outlet 174 of the first heat exchanger tube 170 and the second outlet 184 of the second heat exchanger tube 180 are different.

The present disclosure can, for example, contribute to Goal 7 of the Sustainable Development Goals (SDGs) "Ensure access to affordable, reliable, sustainable and modern energy".

AR Accommodation room FR 1st room SR 2nd room SS Side P 1st divided space (1st space)
Q Third 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 rate adjustment valve (first fluidizing gas supply section)
V2 Second flow rate adjustment valve (second fluidizing gas supply section)
V3 Third flow rate adjustment valve (third fluidizing gas supply section)
V4 4th flow rate adjustment valve (4th fluidizing gas supply section)
WR Wind box chamber 100 Heat exchange device 110 Container 120 Dispersion plate 130 Partition plate 132 First division plate 134 Second division plate 140 First division plate 142 Second division plate 144 Third division plate 152 Fluidization gas discharge mechanism (first fluidizing gas supply section, second fluidizing gas supply section, third fluidizing gas supply section, fourth fluidizing gas supply section)
154 Main piping (first fluidizing gas supply section, second fluidizing gas supply section, third fluidizing gas supply section, fourth fluidizing gas supply section)
160 First branch pipe (first fluidizing gas supply section)
162 Second branch pipe (second fluidizing gas supply section)
164 Third branch pipe (third fluidizing gas supply section)
166 Fourth branch pipe (fourth fluidizing gas supply section)
170 First heat exchanger tube 172 First inlet 174 First outlet 180 Second heat exchanger tube 182 Second inlet 184 Second outlet 200 Control section 300 Heat exchange device 370 Control section

Claims (8)

a container and
A plurality of holes are formed in the container, extending in the horizontal direction and dividing the inside of the container into a storage chamber for accommodating solid particles and a wind box chamber provided below the storage chamber. a dispersion plate,
a partition plate that is spaced apart from the upper surface of the storage chamber and the distribution plate, extends in the vertical direction, and partitions the storage chamber into a first chamber and a second chamber;
a first partition plate that stands upright above a portion of the distribution plate located in the first chamber, and whose upper end is located above the lower end of the partition plate;
a second partition plate that stands upright above a portion of the distribution plate located in the second chamber, and whose upper end is located above the lower end of the partition plate;
a first dividing plate provided in a position corresponding to the first dividing plate in the wind box chamber, extending in the vertical direction and dividing the inside of the wind box chamber;
a second dividing plate provided in a position corresponding to the second partition plate in the wind box chamber, extending in the vertical direction and dividing the inside of the wind box chamber;
a first fluidizing gas supply unit that supplies fluidizing gas to a first space formed between a side surface of the container and the first dividing plate in the wind box chamber;
a second fluidizing gas supply unit that supplies the fluidizing gas to a second space formed between the side surface of the container and the second dividing plate in the wind box chamber;
a third fluidizing gas supply unit that supplies the fluidizing gas to a third space formed between the first dividing plate and the second dividing plate in the wind box chamber;
a first heat transfer tube having a first inlet and a first outlet, at least a portion of which faces into the first chamber, and through which a first fluid passes;
a second heat transfer tube having a second inlet and a second outlet different from the first outlet, at least a portion of which faces into the second chamber, and through which a second fluid passes;
A heat exchange device comprising: comprising 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 includes:
making the superficial velocity of the fluidizing gas supplied by the first fluidizing gas supply section greater than a minimum fluidizing velocity;
The heat exchange device according to claim 1, wherein the superficial velocity of the fluidizing gas supplied by the second fluidizing gas supply section and the third fluidizing gas supply section is a minimum fluidization velocity. comprising 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 includes:
making the superficial velocity of the fluidizing gas supplied by the first fluidizing gas supply section greater than a predetermined velocity exceeding a minimum fluidizing velocity;
The heat exchange device according to claim 1, wherein operations of the second fluidizing gas supply section and the third fluidizing gas supply section are stopped. A control unit that makes the superficial 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 larger than a minimum fluidization velocity. The heat exchange device according to claim 1, comprising: a third dividing plate provided between the first dividing plate and the second dividing plate in the wind box chamber, extending in the vertical direction and dividing the third space;
a fourth fluidizing gas supply unit that supplies the fluidizing gas to a fourth space formed between the second dividing plate and the third dividing plate in the wind box chamber;
Equipped with
The third fluidizing gas supply section includes:
The heat exchange device 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 box chamber. comprising 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 includes:
The superficial velocity of the fluidizing gas supplied by the first fluidizing gas supply section and the fourth fluidizing gas supply section is made larger than a minimum fluidization velocity,
The heat exchange device according to claim 5, wherein the superficial velocity of the fluidizing gas supplied by the second fluidizing gas supply section and the third fluidizing gas supply section is a minimum fluidization velocity. comprising 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 includes:
making the superficial velocity of the fluidizing gas supplied by the first fluidizing gas supply section greater than a predetermined velocity exceeding a minimum fluidizing velocity;
The heat exchange device according to claim 5, wherein operations of the second fluidizing gas supply section, the third fluidizing gas supply section, and the fourth fluidization gas supply section are stopped. minimizing the superficial velocity of the fluidizing gas supplied by the first fluidizing gas supply section, the second fluidizing gas supply section, the third fluidizing gas supply section, and the fourth fluidizing gas supply section; 6. The heat exchange device according to claim 5, further comprising a control section that increases the fluidization speed.

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