JP2003294216A - Fluidized bed treatment facility, and fluidize bed heat- exchanger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat-exchanger capable of attaining quantitative and thermal control by relative compact constitution, in treatment of granular material requiring heat exchange. <P>SOLUTION: This facility is provided with an airflow blowing-out mechanism 21 in a lower zone of a heat-exchanger shell 20 to which a granular heat- exchange treating material is introduced, a heat transfer part 22 to an upper zone through which a heat-exchanging fluid flows, and a metering conveying mechanism 3 for metering-conveying the heat-exchange treating material. A heat-exchange treating material introducing position from the conveying mechanism 3 is located in an intermediate position between the air-flow blowing-out mechanism 21 and the heat-exchanging heat transfer part 22, and the heat- exchange treated material 7 is taken out in an upper side after heat-exchanging. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a fluidized bed treatment furnace for forming a fluidized bed of an object to be treated and a fluidized medium in the furnace and treating the object to be treated, and a fluidized bed treatment furnace taken out from the bottom of the fluidized bed. The present invention relates to a fluidized bed treatment facility including a heat exchanger for performing heat exchange treatment on the contents in the furnace to be heat-treated, and a circulation mechanism for returning the contents in the furnace, which have been subjected to heat exchange by the heat exchanger, to the inside of the furnace. The present invention relates to a fluidized bed heat exchanger that can be preferably used as the heat exchanger of

[0002]

2. Description of the Related Art As fluidized bed treatment equipment as described above,
For example, a device provided with a fluidized bed incinerator, a heat exchanger, and a circulation mechanism is known (JP-A-5-141637 and JP-A-7-190323). In this type of equipment, the treated material is treated in a fluidized bed incinerator, but the fluid medium (usually fluidized sand) and the incombustible material are mixed from the furnace bottom for the purpose of removing incombustible materials. A structure is adopted in which the contents in the furnace are taken out, the incombustibles are classified and removed, and then, for the purpose of recovering the heat of the fluidized medium, the fluidized medium is introduced into a heat exchanger for heat recovery. After completing these processes, the fluidized medium is returned to the fluidized bed via the circulation mechanism and is reused.

In this type of equipment, the contents in the furnace can be taken out from the bottom of the incinerator for the purpose of removing incombustibles, and the fluid medium after removing the incombustibles is cooled,
A stationary conveyer such as a case conveyer lifts the fluidized medium back into the fluidized bed incinerator.

[0004]

Sewage sludge is an example of an object to be treated in a fluidized bed treatment facility. Conventionally, this type of sewage sludge does not have self-combustibility due to the relationship between water content, retained calories, etc., and the heat exchanger may be small in size, and even if the heat recovery amount is managed relatively roughly, there is a problem. It never happened.

However, in recent years, sewage sludge has become self-sustaining due to factors such as advances in dehydration technology and an increase in calories contained in the sewage sludge itself. In such a situation, if the conventional fluidized bed treatment equipment is used, the temperature inside the furnace rises too much and there is a high possibility of damaging the furnace. Therefore, in order to properly control the temperature in the furnace, it is necessary to relatively strictly control the quantity of the material in the furnace taken out from the furnace, and also in the operation such as cooling the fluidized medium in the heat exchanger. Therefore, it becomes necessary to perform heat exchange with a relatively large amount of heat. That is, it becomes necessary to perform the quantitative control and the thermal control of the flowing fluid that is the target of heat exchange, far more strictly than in the conventional case.

Further, as the fluidized bed treatment equipment as described above, there are many existing equipments in operation,
If you try to upgrade such equipment to equipment that can treat sewage sludge nowadays, the basic layout of the current building will be
It is desirable to update without making significant changes.

An object of the present invention is to perform heat treatment on powdery or granular material, which can achieve quantitative control and thermal control with a relatively compact structure. And to obtain a fluidized bed treatment facility equipped with such a heat exchanger.

[0008]

To achieve this object, the fluidized bed treatment equipment according to the present invention has a characteristic construction as set forth in claim 1.
As described in (1), the heat exchanger has an air flow blowing mechanism in the lower area of the heat exchanger can body into which the taken-out furnace contents are introduced, and a heat exchange transfer in which the heat exchange fluid flows in the upper area. A fluidized bed heat exchanger provided with a heat section, wherein the fluidized bed heat exchanger comprises a fixed quantity transport mechanism for quantitatively taking out the contents in the furnace from the bottom of the fluidized bed, and carrying the heat exchanger inside the can, The introduction position from the constant quantity transport mechanism into the heat exchanger can body is set to an intermediate position between the airflow blowing mechanism and the heat exchange heat transfer section, and the heat exchange is performed on the inside of the furnace after the heat exchange. It is intended to adopt a configuration in which the furnace internals that have been led out from a position on the upper side of the heat transfer section are returned to the inside of the furnace via the circulation mechanism.

By adopting a fluidized bed type heat exchanger as the heat exchanger of the fluidized bed treatment equipment of the present application, it is possible to cope with a high heat exchange load and to appropriately perform temperature control. By providing a fixed amount supply mechanism in the introduction part, it is possible to surely and easily control quantitatively the contents in the furnace. Furthermore, by setting the introduction position of the fixed amount supply mechanism between the airflow blowing part and the heat exchange heat transfer part, it is possible to reliably put the contents in the furnace that are conveyed in a fixed amount into the fluidized bed, and to perform heat exchange. By adopting a structure in which the treated powder or granules are taken out from the upper part of the fluidized bed, it is possible to solve the problem that the in-furnace products which have not finished heat exchange bypass the fluidized bed and are sent to the lower side.

As the fluidized bed treatment equipment, it becomes possible to easily and strictly control the quantity and heat of the object to be treated in the fluidized bed heat exchanger.
Even when the self-burning sewage sludge is added, it is possible to prevent problems such as burnout of the furnace by appropriately managing the fluidized medium. Furthermore, the fluidized bed heat exchanger of the present application having a fixed quantity transport mechanism and a fluidized bed heat exchange integrally can be configured relatively compactly, and, for example,
Since it is possible to obtain a structure satisfying the transfer and heat exchange by just adjusting the length of the quantitative transfer mechanism in accordance with the distance between the bottom of the fluidized bed processing furnace and the inlet of the circulation mechanism,
As a result, adaptation to existing equipment is easy.

Further, in the above structure, as described in claim 2, it is preferable that a bottom portion of the fluidized bed heat exchanger is provided with an incombustible substance removing mechanism.

Since a fluidized bed is formed in the can of the fluidized bed heat exchanger, a relatively large incombustible material can be easily removed by the heat exchanger by providing an incombustible material treatment mechanism at the bottom thereof. As a result, in the circulation type fluidized bed processing equipment that performs heat exchange outside the fluidized bed furnace by performing non-combustible material treatment by the heat exchanger of the present application, the main functions required in the system outside the furnace are fluidized. This is very advantageous because it can be covered only by the layer heat exchanger.

Further, in the fluidized bed treatment facility described so far, as described in claim 3, it is preferable that the circulation mechanism is a stationary conveyor.

As described above, in the equipment of the present application, the operation of merely adjusting the length of the quantitative transfer mechanism in accordance with the distance between the bottom of the fluidized bed processing furnace and the inlet of the circulation mechanism. As a result, it is possible to obtain a structure that meets the requirements of transportation and heat exchange, and as a result, it is very easy to adapt to existing equipment, but at the same time, if the circulation mechanism is a stationary conveyor, the equipment cost is At the same time, it is cheaper and at the same time, proven equipment can be used as is.

Further, in the fluidized bed treatment equipment described so far, as described in claim 4, the exhausted fluid discharged from the fluidized bed heat exchanger after forming the fluidized bed is treated by the fluidized bed treatment furnace. It is preferable to provide an exhaust gas guide passage for supplying to the freeboard portion of

In this way, by using the air flow (for example, oxygen-containing gas such as air) used for forming the fluidized bed in the fluidized bed heat exchanger as the secondary air,
Incomplete combustion gas that may be generated in the fluidized bed treatment furnace can be completely treated.

Further, in the fluidized bed treatment equipment described so far, as described in claim 5, a part of the airflow from the blower for generating the airflow forming the fluidized bed in the fluidized bed treatment furnace. Is preferably supplied for forming the fluidized bed.

By sharing the blower in this way,
Formation of fluidized bed in fluidized bed treatment furnace with a single blower,
The use of forming a fluidized bed in a fluidized bed heat exchanger can be achieved at the same time. Here, it is preferable to provide a pressure adjusting mechanism as needed.

Further, in the fluidized-bed treatment facility described so far, as described in claim 6, the fixed amount conveying mechanism is a screw conveyor, and the conveying screw of the screw conveyor is the airflow blowing mechanism. It is preferably provided between the heat exchange heat transfer section and across the heat exchanger can body of the fluidized bed heat exchanger.

The feeding by the conveying screw can be surely carried out across the heat exchanger can body, and the conveying screw itself has a relatively complicated shape and is rotatably driven. It also exerts the stirring and mixing function of the fluidized bed from the air flow blowing mechanism to the part where the heat exchange heat transfer part is provided, and as a result,
The heat exchange capacity can be improved. The screw itself also exerts a cooling effect by the contact between the airflow and the sand.

Further, in order to achieve the above object, an air flow blowing mechanism is provided in the lower region of the heat exchanger can body into which the powdery or granular heat exchange treated product is introduced, and a heat exchange fluid is flown in the upper region. The characteristic configuration of a fluidized bed heat exchanger including a portion is as set forth in claim 7.
As described in the above, a fixed amount conveying mechanism for quantitatively conveying the powdery or granular heat exchange treated product and introducing it into the heat exchanger can body, and processing from the constant amount conveying mechanism into the heat exchanger can body. An object introduction position is set to an intermediate position between the airflow blowing mechanism and the heat exchange heat transfer section, and the heat exchange treated object after heat exchange can be led out from a position above the heat exchange heat transfer section. Being configured.

By adopting this structure, in claim 1,
The actions and effects described for the fluidized bed heat exchanger can be achieved.

In such a fluidized bed heat exchanger, as described in claim 8, the constant quantity conveying mechanism is a screw conveyor, and the conveying screw of the screw conveyor is heat exchange transfer with the air flow blowing mechanism. It is preferable that the heat exchanger is provided so as to traverse the inside of the heat exchanger can body.

By adopting this structure,
The actions and effects described for the fluidized bed heat exchanger can be achieved.

Further, in such a fluidized bed heat exchanger, as described in claim 9, the constant quantity transport mechanism is a U-shaped introduction pipe of the heat exchange treated product, and the introduction pipe is connected to the introduction pipe. It is also preferable to adopt a configuration in which the amount of gas supplied is adjusted to adjust the amount of transportation. With this structure, a powder transport state equivalent to that of the above-mentioned screw type can be realized, and the above-described actions and effects can be achieved. The transportation amount can be easily controlled by controlling the amount of gas to be supplied.

[0026]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing a schematic configuration of a fluidized bed treatment facility 1 of the present application, and FIG. 2 is a diagram showing a detailed configuration of a fluidized bed heat exchanger 2 unique to the present invention provided in the fluidized bed treatment facility 1. As shown in the figure, the fluidized bed heat exchanger 2 of the present application is characterized by the relationship between the introduction position of the powder or granular material that is the target of the heat exchange process and the derivation positional relationship of the powder or granular material that has undergone heat exchange. The exchanger 2 is integrally provided with a screw conveyor 3 at its powder and granular material introduction portion, and has an incombustible substance removing mechanism 4
Is also prepared.

First, based on FIG. 1, a fluidized bed treatment facility 1
Will be described. The fluidized bed treatment facility 1 is a facility for incinerating sewage sludge as described above (henceforth, referred to as fluidized bed incineration facility), and is obtained by improving the existing fluidized bed incineration facility. is there. Explaining the relationship with the existing equipment, the equipment building (not shown), the fluidized bed incinerator 6, and the case conveyor 8 for returning the fluidized sand 7 taken out from the fluidized bed incinerator 6 back into the furnace are shared. There is.

In the fluidized bed incinerator 1, the fluidized bed incinerator 6 (an example of a fluidized bed treatment furnace), the heat exchanger 2, the case conveyor 8, the upper and lower bunkers 9 and 10 and the fluidized sand 7 are disposed. It is provided along the circulation path A. Here, the case conveyor 8 and the upper bunker 9 together with the fluidized sand transfer path 11 constitute a circulation mechanism referred to in the present application.

The fluidized bed incinerator 6 is a fluidized bed 1 of the sewage sludge as a material to be treated and the fluidized sand 7 as a fluidized medium.
2 is formed in the furnace, and sewage sludge is dried and incinerated.
The fluidized bed incinerator 6 is provided with a charging port 13 for charging an object to be treated into the furnace, and an air flow blowing mechanism 14 for blowing a fluidized air for forming a fluidized bed in a dispersed state at a lower portion thereof. . The air flow blowing mechanism 14 includes a blower 15
The airflow a1 generated in 1 is sent. On the other hand, fluidized bed 1
The exhaust gas e1 after the formation of 2 is exhausted from the exhaust port 16 after completing a predetermined gas treatment. The exhaust gas e1 is used for preheating air. Freeboard part 1 of fluidized bed incinerator 6
Exhaust gas e2 from a fluidized bed heat exchanger 2 to be described later is supplied to 7 as secondary air, and is used for ensuring a complete combustion state in the freeboard portion 17. At the bottom of the fluidized bed incinerator 6, there is provided a take-out pipe 18 capable of taking out the contents inside the furnace, and the feeding of the conveyed matter of the screw conveyer 3 which is a quantitative conveying mechanism provided in the fluidized bed heat exchanger 2 of the present application. It is connected to the mouth 19. The take-out pipe 18 may be provided with a blocking mechanism such as a damper.

As the heat exchanger, a so-called fluidized bed heat exchanger 2 is provided, in which heat is supplied by an airflow blowing mechanism 21 in the lower region of the heat exchanger can body 20 and by heat exchange fluid f in the upper region. An exchange heat transfer section 22 (heat transfer tube group through which cooling water flows) is provided, and a fluidized bed 2 of the furnace contents is supplied in a fixed amount into the can body.
3 is formed to cause heat exchange mainly between the fluidized sand 7 and the heat exchange fluid f.

Air flow blowing mechanism 2 of this fluidized bed heat exchanger 2
1, a part a2 of the airflow generated by the blower 15 described above is guided, and the airflow blowing mechanism 21 disperses and supplies the airflow to the lower region in the heat exchanger can body 20. . The exhaust gas e2 after the fluidized bed is formed is supplied to the freeboard section 17 of the fluidized bed incinerator 6 via the exhaust gas guide path 24 as described above.

Next, the structure of charging the furnace contents into the heat exchanger can 20 will be described. A screw conveyer 3 as a fixed quantity conveying mechanism is provided at the introduction part of the fluidized bed heat exchanger. The transfer introduction position is an intermediate position between the airflow blowing mechanism 21 and the heat exchange heat transfer section 22 in the height direction of the heat exchanger. Further, as can be seen from FIG. 2, the conveying screw 25 of the screw conveyor 3
However, between the air flow blowing mechanism 21 and the heat exchange heat transfer section 22, the inside of the heat exchanger can body 20 of the fluidized bed heat exchanger is traversed (crossing both side walls of the heat exchanger can body). ) It is provided. Here, as the support structure of the transport screw 25,
It is preferable to employ a structure of supporting both ends, but a structure of supporting one end may be used.

Regarding the screw conveyor 3, the cooling water circulation passage 27 is provided on the outer peripheral portion of the conveyor outer cylinder 26, and the cooling water circulation passage 27 is also provided in the conveying screw 25 in the axial direction so that the screw conveyor 3 can be operated. A structure that works as a so-called water-cooled screw conveyor is adopted.

Therefore, in this fluidized bed heat exchanger 2, a predetermined cooling operation is possible by cooling on the conveyor side and heat exchange on the fluidized bed side. In the present application, by adjusting the length of the screw conveyor 3, the quantity control and the thermal control are favorably performed while maintaining the existing distance from the bottom of the fluidized bed incinerator 6 to the case conveyor 8. It is possible to obtain equipment that can be used.

Now, at the bottom of the fluidized bed heat exchanger 2,
The incombustibles removing mechanism 4 is constructed by including a rotary valve, a cut gate, and the like.

The product (mainly fluidized sand in this example) that has undergone heat exchange by the fluidized bed heat exchanger 2 is drawn out near the upper surface of the fluidized bed 23 formed in the heat exchanger can body 20. Then, a configuration is adopted in which the heat is transferred from the outlet 28 provided at a position above the uppermost portion of the heat exchange heat transfer section 22.

The temperature condition in the fluidized bed heat exchanger 2 will be described. 700 at the entrance to the screw conveyor 3.
A material having a temperature of about ° C can be cooled to about 200 ° C at the outlet 28.

The processed product derived from the outlet 28 is
It is sent to the case conveyor 8 as a stationary conveyor provided in the equipment building 5, and is sent to the upper bunker 9 and the lower bunker 10. The upper bunker 9 can be returned to the fluidized bed incinerator 6, and the lower bunker 10 can be returned to the inlet of the case conveyor 8. The distribution to the upper bunker 9 and the lower bunker 10 is controlled corresponding to the transport amount of the screw conveyor 3 so that the operating conditions of the fluidized bed incinerator 6 and the fluidized bed heat exchanger 2 are appropriate.

[Another Embodiment] Another embodiment of the present application will be described below. (A) In the above-mentioned embodiment, the example of the treatment target of the fluidized bed incinerator is sewage sludge, but other organic sludge and
General waste such as paper waste and kitchen waste, industrial waste such as waste plastic, waste tires, etc. can also be targeted. (B) In the above embodiment, an example of obtaining the fluidized bed treatment equipment of the present application by installing the fluidized bed heat exchanger of the present application to the existing equipment has been shown. You may build all the facilities. (C) In the above embodiment, an example in which a screw conveyor is used as the fixed quantity transport mechanism has been shown, but a pusher or the like can be adopted as such a mechanism. (D) In the above embodiment, the contents inside the furnace are taken out from the bottom of the fluidized bed incinerator, introduced into the fluidized bed heat exchanger of the present application, and returned to the inside of the furnace after treatment. Although the configuration has been described, the fluidized bed heat exchanger of the present application may be provided in a circulating fluidized system treatment facility including a cyclone in a fluidized bed incinerator. An example of such a circulating fluidized boiler system is shown in FIG. In the equipment shown in the same figure, a sedimentary layer 31 of fluidized sand is formed below the cyclone 30, and a fixed amount of fluidized sand is cut out and supplied from this layer 31 by a screw conveyor, and heat exchange is performed. (E) In the above embodiment, an example in which the treatment in the facility is incineration treatment is shown. However, in the case where a fluidized bed reactor is provided instead of the fluidized bed incinerator in the embodiment, a predetermined treatment is required. The target is the reaction processing of substances. Therefore, in the present application, such incineration treatment and reaction treatment are simply referred to as treatment, and a furnace for performing such treatment is referred to as a treatment furnace. (F) In the above-described embodiment, an example in which the constant-quantity transport mechanism is a screw conveyor is shown, but as shown in FIG. By adjusting the blowing amount of the gas supplied to a predetermined location, the amount of the powder transported through the valve may be controlled. As shown in the figure, the pneumatic valve is provided with a U-shaped tube, and the powder introduced from one of the tube ends is sent out from the other tube end. The powder can be satisfactorily carried by blowing a carrying gas such as air from a blowing part provided at the bottom part.

[Brief description of drawings]

FIG. 1 is a diagram showing a schematic configuration of a fluidized bed treatment facility of the present application.

FIG. 2 is a diagram showing a configuration of a fluidized bed heat exchanger of the present application.

FIG. 3 is a configuration diagram of an example in which a fluidized bed heat exchanger of the present application is adopted in a circulating fluidized boiler system.

FIG. 4 is a diagram showing an example of equipment equipped with a pneumatic valve.

[Explanation of symbols]

1 Fluidized bed processing equipment 2 Fluidized bed heat exchanger 3 screw conveyor 6 fluidized bed incinerator 7 fluidized sand 8 case conveyor 12 fluidized bed 17 Free board section 23 Fluidized bed 24 Exhaust taxiway 25 Conveyor screw 40 pneumatic valve

   ─────────────────────────────────────────────────── ─── Continued front page    (71) Applicant 000006208             Mitsubishi Heavy Industries, Ltd             2-16-5 Konan, Minato-ku, Tokyo (71) Applicant 000001052             Kubota Corporation             2-47 Shikitsuhigashi, Naniwa-ku, Osaka-shi, Osaka (72) Inventor Hiroshi Mizushima             2-8-1, Nishi-Shinjuku, Shinjuku-ku, Tokyo Tokyo             Tokyo Metropolitan Sewer Bureau (72) Inventor Toshiya Shimada             2-8-1, Nishi-Shinjuku, Shinjuku-ku, Tokyo Tokyo             Tokyo Metropolitan Sewer Bureau (72) Inventor Toshikazu Koike             2-8-1, Nishi-Shinjuku, Shinjuku-ku, Tokyo Tokyo             Tokyo Metropolitan Sewer Bureau (72) Inventor Jun Mori             4-20-3 Ebisu, Shibuya-ku, Tokyo Ebi             Kotobuki Garden Place Tower 25th floor Japanese insulator             Inside Tokyo Headquarters (72) Inventor Masaru Kawashima             3 1-3 Nihombashi Muromachi, Chuo-ku, Tokyo             Kubota Tokyo Head Office (72) Inventor Tomoyuki Nojima             3 1-3 Nihombashi Muromachi, Chuo-ku, Tokyo             Kubota Tokyo Head Office (72) Inventor, Katsura Kokita             3 1-3 Nihombashi Muromachi, Chuo-ku, Tokyo             Kubota Tokyo Head Office (72) Inventor Koji Sakata             2-1-6 Nishijima, Nishiyodogawa-ku, Osaka City, Osaka Prefecture             Kubota Shin-Yodogawa Environmental Plant Center             Within F term (reference) 3K064 AA10 AB03 AD08 BA07 BA09                       BA15 BA19 BB05

Claims (9)

[Claims] 1. A fluidized bed processing furnace for forming a fluidized bed of an object to be processed and a fluid medium in the furnace to process the object to be processed,
A fluidized bed treatment facility including a heat exchanger that heat-exchanges the in-furnace products taken out from the bottom of the fluidized bed, and a circulation mechanism that returns the in-furnace products that have undergone heat exchange in the heat exchanger into the furnace. Wherein the heat exchanger comprises an airflow blowing mechanism in the lower region of the heat exchanger can body into which the taken-out furnace contents are introduced, and a heat exchange heat transfer part in which the heat exchange fluid flows in the upper region. The fluidized bed heat exchanger is a fluidized bed heat exchanger, wherein the fluidized bed heat exchanger includes a fixed quantity transfer mechanism for quantitatively taking out the in-furnace material from the bottom of the fluidized bed and transferring it to the heat exchanger can body. From the heat exchanger can be set to an intermediate position between the airflow blowing mechanism and the heat exchange heat transfer part, and the heat exchange heat transfer part With a configuration in which it is derived from a position on the upper side, Fluidized bed processing equipment back into the furnace through a. 2. The fluidized bed treatment facility according to claim 1, wherein an incombustibles removing mechanism is provided at the bottom of the fluidized bed heat exchanger. 3. The fluidized bed treatment facility according to claim 1, wherein the circulation mechanism is a stationary conveyor. 4. The exhaust gas guide path for supplying exhaust gas discharged from the fluidized bed heat exchanger after the fluidized bed is formed to a freeboard section of the fluidized bed treatment furnace. Fluidized bed processing equipment. 5. The fluidized bed processing furnace according to claim 1, wherein a part of an air stream from a blower that generates an air stream forming a fluidized bed is supplied for forming the fluidized bed. Fluidized bed processing equipment. 6. The constant quantity conveying mechanism is a screw conveyor, and the conveying screw of the screw conveyor is
The fluidized bed treatment according to any one of claims 1 to 5, which is provided between the airflow blowing mechanism and the heat exchange heat transfer section so as to cross the heat exchanger can body of the fluidized bed heat exchanger. Facility. 7. A fluidized bed heat exchange device comprising an air flow blowing mechanism in a lower region of a heat exchanger can body into which a powdery or granular heat exchange treated product is introduced and a heat exchange heat transfer part in which an heat exchange fluid flows in an upper region. And a fixed quantity transport mechanism for quantitatively transporting the powdery or granular heat exchange treated product and introducing it into the heat exchanger can body, and introducing the treated product from the constant quantity transport mechanism into the heat exchanger can body. A position is set to an intermediate position between the airflow blowing mechanism and the heat exchange heat transfer section, and the heat exchange treated product after heat exchange is
A fluidized bed heat exchanger configured so that it can be led out from a position above the heat exchange heat transfer section. 8. The constant quantity conveying mechanism is a screw conveyor, and the conveying screw of the screw conveyor is
The fluidized bed heat exchanger according to claim 7, which is provided across the inside of the heat exchanger can body between the airflow blowing mechanism and the heat exchange heat transfer section. 9. The transporting amount according to claim 7, wherein the fixed amount transporting mechanism is a U-shaped introduction pipe for the heat exchange treatment product, and the amount of the transporting gas supplied to the introduction pipe is adjusted. Fluidized bed heat exchanger.