JPS5910255B2 - Plate heat exchange reactor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a plate thermal deformation reactor for catalytically reacting reaction gases, and its main purpose is to provide a compact and simple structure, and to cool the heat generated by the catalytic reaction. An object of the present invention is to provide a novel plate thermal deformation reaction device that efficiently absorbs heat from a working fluid.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a cross-sectional view of one embodiment of the present invention, and FIG. 52 is a right side view thereof. Inside the horticultural greenhouse 1. A heating device 2 that burns a solid fuel such as coke to obtain hot air is arranged near the door 3. The warm air obtained by the heating device 2 is
Air is blown into the greenhouse 1 from an air outlet pipe 4 provided along the side wall of the greenhouse 1 and provided with a plurality of blow holes (not shown), thereby warming the inside of the greenhouse 1. The exhaust gas after the coke combustion is discharged from the chimney 5 to the outside of the greenhouse 1 after carbon monoxide is oxidized by the action of a catalyst as described later. 15. FIG. 3 is a longitudinal cross-sectional view of the heating device 2, and FIG. 4 is a cross-sectional view taken along the section line ■-■ in FIG.

FIG. 5 is a cutaway perspective view showing the inside of the heating device 2. FIG. The casing 6 of the heating device 2 has a rectangular parallelepiped shape that is elongated in the lateral direction, and is installed on the ground 20 by legs Ta and Tb. Inside the casing 6, from one longitudinal end to the other end (from the left to the right in FIGS. 3 and 4), there are a heating chamber a heat exchange section 9 and an air guide chamber 10. is formed. The heat exchange section 9 has a plate thermal deformation reaction device 15 interposed between an upper gas chamber 12 defined by the side walls 11a, llb and the casing 256, and a lower gas chamber 14 defined by the side walls 13a, 13b and the casing 6. It consists of This plate thermal deformation reaction device 15 allows air to flow from the air guide chambers 10 to n to the heating chamber 8 as shown by solid line arrows, and in a direction perpendicular to the direction of air flow as shown by broken line arrows. As shown, gas is allowed to flow from the upper gas chamber 12 to the lower gas chamber 14 without mixing with each other. A plurality of, for example, five, upright combustion tubes 16 are arranged in the heating chamber 8.

These combustion tubes 16 & 9 may be arranged in a straight line as shown in the figure, or may be arranged in a staggered manner.

A lead-out pipe 17 is attached to the upper part of each combustion cylinder 16, and each lead-out pipe 17 is commonly connected to a collecting pipe 18. One end of the collecting pipe 18 is closed, and the other end is connected to the upper gas chamber 12. A blow-off pipe 4 communicating with the heating chamber 8 is connected to one end side wall 6c of the casing 6. 6th
FIG. 1 is a longitudinal sectional view of the combustion tube 16.

The combustion tube 16 has a cylindrical shape made of metal, and its upper end passes through the top plate 6a of the casing 6 in an airtight manner. Combustion tube 16
The lower end of the casing 6 is installed on the ground by passing through the bottom plate 6b of the casing 6 in an airtight manner. The combustion tube 1 is attached to the soil end of the combustion tube 16.
A throw tube 37 that protrudes concentrically into the throw tube 6 is fixed, and a lid 18 is removably fitted into the throw tube 37. A conical perforated plate 19 with a lower constriction is fixed to the inner wall of the combustion tube 16 near the bottom plate 6b of the casing 6. A support frame 20 is suspended from the lower surface of the perforated plate 19, and a grate 21 that closes the opening of the perforated plate 19 is supported by the support frame 20 so as to be movable in the horizontal direction. Below the grate 21, the combustion tube 16 is closed with a bottom plate 16b. FIG. At the lower part of the combustion tube 16, on the side perpendicular to the moving direction of the grate 21,
Openings 22 are formed for the intake of combustion air and for the discharge of incinerated ash. A cover 2 is provided to cover the opening 22, and the cover 23 is supported by upper and lower guide members 24a and 24b fixed to the sides of the combustion tube 16. Moreover, the cover 23 is guided by the guide members 24a and 24b and is movable along the outer peripheral surface of the combustion tube 16, so that the opening area of the opening 22 can be changed by moving the cover 23 as appropriate. , the amount of combustion air can be adjusted. In addition, at the upper end of the combustion tube 16,
A suction pipe 25 for suctioning secondary air into the combustion gas after coke combustion is connected. FIG. 9 is a perspective view showing the plate heat exchange type reaction device 15.

This plate heat exchange reactor 15 includes an upper gas chamber 12.
and a reaction gas passage 26 that communicates with the lower gas chamber 14, and a passage 2 that communicates the air guide chamber 10 and the heating chamber 8.
7 are formed adjacently and alternately through plate-shaped heat transfer walls 28 . Therefore, in the reaction gas passage 26, the coke-burning gas flows from above to below as shown by the broken line arrow, and in the passageway 27, air flows laterally in the direction intersecting the combustion gas as shown by the solid line arrow. 5 passes through. The reaction gas passage 26 is provided with a catalyst body 2 while allowing combustion gas to flow therethrough.
9 is disguised.

The catalyst body 29 is formed by attaching a carrier such as alumina or titania to a corrugated metal mesh and impregnating the carrier with an active substance such as platinum or palladium. This catalyst body 29 is installed in the reaction gas passage 26 so that its cross section perpendicular to VC in the flow direction of combustion gas (the vertical direction in FIG. 9) is wave-shaped. Therefore, it is easy to insert and remove the catalyst body 29 into the reaction gas passage 26. In this way, the catalyst bodies 29 are uniformly arranged in the reaction gas passage 26. Therefore, the plate-shaped transmission Heat exchange is performed uniformly over the entire surface of the thermal wall 28. Therefore, the temperature of the catalyst body 29 can be made uniform, and there is no possibility that locally high temperature parts will occur. Therefore, deterioration of the catalyst body 29 due to high temperature can be prevented. A corrugated wire mesh 30 is installed in the passage 27 through which air flows, and gaps in the wire mesh 30 are filled with a filler such as Raschig 5 rings 31.

By filling the passage 27 with the filler in this manner, the flow of air flowing through the passage 27 is disturbed, and the heat transfer area is increased, thereby improving heat transfer efficiency. 9
One end of a discharge pipe 32 is connected to the lower gas chamber 14 .

The discharge pipe 32 extends upward in the air guide chamber 10 and passes through the top plate 6a of the casing 6, and the other end is connected to the casing 6.
It is connected to the suction port of an induced fan 33 installed at the top of the . The discharge port of the induced blower J33 is connected to the chimney 5VC. An air guide chamber 10 is provided on the other end side wall 6d of the casing 6.
One end of the introduction tube 34 is connected to the inlet tube 34 . conductor tube 3
The other end of 4 is a blower 35 installed on the ground inside the greenhouse 1.
connected to the outlet of the When heating the inside of the greenhouse 1, each combustion tube 16 is loaded with enough coke to be consumed within the heating time, and each opening 22 is filled with enough coke for the necessary combustion. Keep the opening wide enough to accommodate the amount of air.

Next, the lower part of the coke deposit layer 36 filled in each combustion tube 16 is ignited, and the blowers 33 and 35 are driven. As a result, combustion air is sucked through the opening 22 of the combustion tube 16 and combustion of coke is started. When the coke is burned, only the lower part of the deposited layer 36 is oxidized and burned, and the upper part is heated by the heat of combustion, creating a reducing atmosphere. Therefore, incomplete combustion gas containing carbon monoxide is generated from the deposited layer 36, and this incomplete combustion gas is guided to the upper gas chamber 12 via the outlet pipe 17 and the collecting pipe 18. In addition,
An amount of air necessary for the catalytic reaction in the plate heat exchanger type reaction device 15 is sucked from the suction pipe 25 at the upper part of the combustion tube 16 . The temperature of this incompletely combusted gas in the upper gas chamber 12 is, for example, about 200°C. On the other hand, air is introduced into the air guide chamber 10 from the blower 35 via the guide pipe 34 and flows through the passage 27 of the plate heat exchange reaction device 15. In the plate heat exchange reactor 15, the combustion gas flowing from the upper gas chamber 12 into the reaction gas passage 26 undergoes an oxidation reaction due to the catalytic action of the active material of the catalyst body 29.
Carbon monoxide is converted to carbon dioxide and generates heat, for example about 400-600°C.

Here, since air flows through the passage 27 adjacent to the reaction gas passage 26 via the plate-shaped heat transfer wall 28,
The amount of heat in the reactant gas passage 26 is imparted to the air via the plate-shaped heat transfer wall 28, heating the air. Moreover, since the reaction gas passage 26 and the passage 27 intersect, the passage 2
The temperature distribution of the air at 7 becomes almost uniform. aisle 27
The gas discharged into the lower gas chamber 14 after heat exchange with the air flowing through the greenhouse 1 is induced by an induced blower 33 through a discharge pipe 32, and is discharged from the chimney 5 to the outside of the greenhouse 1.

The gas discharged from the chimney 5 contains almost no toxic carbon monoxide since the gas has been subjected to the catalytic reaction by the catalyst body 29. On the other hand, the air heated in the plate heat exchanger reactor 15 reaches the heating chamber 8 from the passage 27, where it comes into contact with the outer wall of the combustion tube 16 in which coke is being burned, and is further heated. Air is blown into the greenhouse 1 from the blow-off hole of the blow-off pipe 4, thereby warming the inside of the greenhouse 1.
Here, the volume of each combustion tube 16 is made large, and an amount of coke corresponding to the time for heating the inside of the greenhouse 1 is charged into each combustion tube 16 when the heating device 2 is started.

In this case, incomplete combustion of coke occurs in each combustion tube 16, but the generated carbon monoxide undergoes a catalytic reaction in the plate heat exchanger type reaction device 15 and is oxidized. Therefore, in the heating device 2 as a whole, the coke is always completely combusted, and the trouble of repeatedly supplying a small amount of coke to achieve complete combustion within the combustion tube 16 can be saved. In addition, in the plate heat exchange type reaction device 15, the reaction gas passage 26
If the widths Dl and d2 (see FIG. 9) of the passages 27 are made smaller, heat exchange can be performed more efficiently, and deterioration of the active material of the catalyst body 29 due to high temperatures can be prevented.

In addition, since the catalyst body 29 is formed into a corrugated shape, it can be easily inserted into and removed from the reaction gas passage 26 when replacing the active substance due to deterioration. The present invention can be implemented not only in connection with a heating device such as in the above-described embodiments, but also widely as a reaction device for catalytically reacting a reaction gas.

As described above, according to the present invention, the reaction gas passages and the cooling fluid passages are alternately arranged adjacent to each other through the plate-shaped heat transfer walls, and the reaction gas passages are provided with a contact that causes a reaction in contact with the reaction gas. Since the medium is loaded, the reaction gas undergoes a contact reaction in the reaction gas passage and generates heat, thereby increasing the temperature of the reaction gas. Therefore, more heat can be given to the cooling fluid than when no catalyst is used, and thermal efficiency can be improved. Therefore, when the reaction gas contains carbon monoxide, for example, carbon monoxide j changes to carbon dioxide, and there is no fear that harmful carbon monoxide will be released into the atmosphere. Further, in the present invention, plate-type heat exchange is performed, so that the catalyst can be uniformly disposed within the reaction gas passage. Therefore, the temperature of the catalyst body can be made uniform, and the occurrence of locally high temperature areas is prevented. Therefore, deterioration of the catalyst body due to high temperatures can be prevented.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of one embodiment of the present invention, and FIG.
3 is a longitudinal sectional view of the heating device 2, FIG. 4 is a sectional view taken from the section line ■-■ in FIG. 3, and FIG. 5 shows the inside of the heating device 2. A cutaway perspective view, FIG. 6 is a vertical sectional view of the combustion tube 16, FIG. 7 is a sectional view taken from the section line ■-■ in FIG. 6, and FIG. 8 is a section taken along the section line 9 is a perspective view showing the reaction device 15. FIG. 15... Plate heat exchanger reactor, 26...
... Reaction gas passage, 27... Passage, 28...
...Plate-shaped heat transfer wall.

Claims (1)

[Scope of Claims] 1. Reaction gas passages through which a reaction gas flows and circuits through which a cooling fluid flows are alternately arranged adjacent to each other with a plate-shaped heat transfer wall interposed therebetween, and each reaction gas passage has a circuit in which a reaction gas is in contact with the reaction gas. A plate thermal deformation reaction device characterized in that catalyst bodies for carrying out an exothermic reaction are uniformly charged and arranged. 2. The plate thermal deformation reaction device according to claim 1, wherein the reaction gas contains carbon monoxide, and the catalyst body oxidizes carbon monoxide to carbon dioxide.