JP3378526B2 - Heat exchange equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchange device for recovering sensible heat of a high temperature gas into a low temperature gas by using a granular heat medium.

[0002]

2. Description of the Related Art An example of a heat exchange device for recovering sensible heat from a high temperature gas such as exhaust gas using a granular heat medium having a diameter of about 1 to 3 mm and heating a low temperature gas such as room temperature air with the recovered sensible heat. As such, there is one disclosed in JP-A-54-139160.

As shown in FIG. 5, this heat exchange device includes an upper heat exchange chamber 52 in which a high temperature gas 51 flows and a low temperature gas 5
The lower heat exchange chamber 54 through which 3 flows is disposed above and below, and these heat exchange chambers 52, 54 are communicated with each other by a communication section 55 having a small cross section. 57 are provided in a plurality of stages. Granular heat medium 5
9 is charged from a charging port 58 provided in the upper heat exchange chamber 52, and each tray 56 of the upper heat exchange chamber 52 and the communicating portion 5 are charged.
5. The sensible heat, which has been sequentially dropped to each tray 57 of the lower heat exchange chamber 54 and recovered from the high temperature gas 51 in the upper heat exchange chamber 52, is released to the low temperature gas 53 in the lower heat exchange chamber 54, and the low temperature gas 5
Heat 3. The heat medium 59 that has dropped to the bottom of the lower heat exchange chamber 54 is taken out from the discharge port 60, returned to the input port 58 of the upper heat exchange chamber 52 through the transport path 61, and is circulated.

In the heat exchange device of the above-mentioned type, the particulate heat medium is agglomerated or adhered to the tray due to adhesive substances such as tar and chloride contained in high temperature gas such as combustion exhaust gas used as a heat source. May block the holes of the tray and hinder the flow of heat exchanged gas. The refractory on the inner wall of the heat exchange chamber may be damaged and separated, and the separated pieces may block the holes of the tray. This clogging of the holes in the tray not only lowers the heat exchange efficiency but also increases the pressure loss in the heat exchange chamber, which increases the load on the blower that blows gas into the chamber. Need to be replaced or replaced.

For the above inspection and replacement, it is desirable to easily remove the tray.
In the heat exchange device described in No. 0390, as shown in FIG. 6, a window 63 is provided on the wall of the heat exchange chamber 62, and a tray 64 is inserted through this window 63 so that the heat exchange chamber 62 can be passed into the heat exchange chamber 62. I have to. A vibration device 65 is attached to the base end of the tray 64 to prevent the heat medium from adhering thereto.

[0006]

In the heat exchange device with a window described above, the tray can be easily removed, but the heat medium enters the mounting portion of the tray provided with the window and stays there. There is. High-temperature gas incinerates waste such as general waste and industrial waste in an incinerator, melts it in a melting furnace,
Or exhaust gas generated when decomposing in a pyrolysis furnace,
When these contain an adhering substance such as tar or chloride, the operation of the heat exchange device may be forced to be stopped in order to remove the heat medium accumulated in the tray mounting portion. Not only does this stagnant heat medium contribute to heat exchange, but when a vibrating device is attached to the tray, it enters a gap such as a gland packing that seals the gas in the heat exchange chamber, reducing the sealability, and There is a problem that damages the.

Therefore, an object of the present invention is to provide a heat exchanging device in which a heat medium does not stay in a tray mounting portion provided with a window for inserting a tray.

[0008]

In order to solve the above-mentioned problems, the present invention has an upper heat exchange chamber through which a high temperature gas flows and a lower heat exchange chamber through which a low temperature gas flows, which are provided above and below. The lower part of the heat exchange chamber and the upper part of the lower heat exchange chamber are communicated with each other by a communication section having a small cross section, and trays are provided in a plurality of stages in each heat exchange chamber. The heat medium to be charged is sequentially dropped onto each tray of the upper heat exchange chamber, the communicating portion, each tray of the lower heat exchange chamber, and the bottom of the lower heat exchange chamber, and a gas flowing through each of the heat exchange chambers. In the heat exchange device for heat exchange, the high-temperature gas is high-temperature exhaust gas generated when waste is treated, and a tray insertion window is provided on the wall of the tray attachment portion of the heat exchange chamber, and this window is provided. At the tray mounting part, descend toward the inside of the heat exchange chamber That the inclined passage portion is of employing the configuration provided.

That is, the tray mounting portion provided with the window is provided with the inclined passage portion which descends toward the inside of the heat exchange chamber, so that the heat medium entering the tray mounting portion is introduced into the heat exchange chamber from the inclined passage portion. I tried to put it back.

By connecting the vibrating means to the tray, it is possible to prevent the heat medium from adhering to the tray.

By connecting the vibrating means to the tray through a connecting member and internally cooling the connecting member,
By providing a gas seal member in the heat exchange chamber at the portion of the connecting member, deterioration of the seal member due to heat can be prevented.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to FIGS. In this heat exchange device, an upper heat exchange chamber 2 in which a high temperature gas 1 flows and a lower heat exchange chamber 4 in which a low temperature gas 3 flows are arranged above and below, and these heat exchange chambers 2 and 4 are communication pipes (communication section). ) 5, the trays 6 and 7 of perforated plates are attached to the heat exchange chambers 2 and 4 in a plurality of stages, respectively. The granular heat medium 8 is used in the upper heat exchange chamber 2
Is charged from a charging port 9 provided on the upper part of the upper heat exchange chamber 2, and is sequentially dropped to each tray 6 of the upper heat exchange chamber 2, the communication pipe 5, each tray 7 of the lower heat exchange chamber 4, and the bottom of the lower heat exchange chamber 4, The sensible heat is recovered by contacting the upper heat exchange chamber 2 with the high-temperature gas 1 flowing from the ventilation port 10 to the exhaust port 11, and the lower heat exchange chamber 4 is connected to the ventilation port 1
The sensible heat collected is discharged to the low temperature gas 3 flowing from 2 to the exhaust port 13 to heat the low temperature gas 3.

The heat medium 8 that has dropped to the bottom of the lower heat exchange chamber 4 is discharged to the ejector 15 from the discharge port 14 provided at the bottom, and is returned to the hopper 18 through the carrier pipe 17 by the air blown by the blower 16. Then, it is charged again into the upper heat exchange chamber 2 through the charging port 9.

As shown in FIGS. 2A and 2B, the tray 6 mounting portion of the upper heat exchange chamber 2 is provided with an exit window 19 having a horizontally long cross section into which the tray 6 is inserted.
A vibrating device 20 is installed outside the vibrating device, and the base end of the tray 6 is connected to the vibrating device 20 via a connecting member 21. The tray 6 is formed of a U-shaped thin steel plate so as to cover the circular cross section of the upper heat exchange chamber 2, and has a large number of through holes 2 on its plate surface.
Two are provided. Further, an inner wall 23 of the heat-resistant brick forming the upper heat exchange chamber 2 is provided with a concave stepped portion 24 which is continuous in the circumferential direction at the same height position as the exit window 19, and the stepped portion 24 is reinforced with a coarse lattice. The ring-shaped support member 25 is inserted and the tray 6 is placed on the support member 25.
Is placed. The tray 6 is made of thin steel plate.
This is because the mass of the vibrating device 20 is reduced to reduce the load on the vibrating device 20, and the supporting member 25 is for preventing the thin tray 6 having a low rigidity from bending.

The lower frame portion of the exit window 19 is provided with three inclined grooves (inclined passages) 26 that descend and incline toward the inside of the upper heat exchange chamber 2. According to the positions of these inclined grooves 26, A notch 27 is provided at the base end of the tray 6. The heat medium 8 that moves and enters the exit window 19 on the tray 6 drops from the notch 27 into the inclined groove 26 and is returned to the upper heat exchange chamber 2.

As shown in FIG. 3, a lid member 28 with a packing is attached to the exit window 19, and the lid member 28 is attached.
The vibration device 20 is attached to the. Vibration device 2
0 is attached to the lid member 28 via the seal cover 30 having the cylindrical portion 29, and the seal cover 3 is provided between the inner cylinder 31 and the outer cylinder 32 with the flange provided on the front side thereof.
The distal end of the cylindrical portion 29 of 0 is slidably fitted, and the flange of the outer cylinder 32 is pressed toward the rear surface side by the coil spring 34 attached to the bolt 33 that attaches the flange of the seal cover 30 to the lid member 28. . Therefore, the distance between the tip of the cylindrical portion 29 of the seal cover 30 and the bottom of the annular groove 35 between the inner cylinder 31 and the outer cylinder 32 is the vibration width δ of the vibration device 20.

The connecting member 21 is formed of a round bar made of heat-resistant stainless steel, and is a nut 36 screwed into a threaded portion provided on the base end side of the inner member 31 on the front side of the vibrating device 20. A base end portion of the tray 6 is welded to a tip end portion which is attached to the inside and is passed through the cylindrical portion 29 of the seal cover 30 and the hole 37 provided in the lid member 28. Between the outer peripheral surface of the connecting member 21 and the inner peripheral surface of the cylindrical portion 29 that slide with each other, a gland packing 38 is sealed so that the high temperature gas 1 in the upper heat exchange chamber 2 does not leak to the outside, and also slides with each other. An O-ring 39 seals between the outer peripheral surface of the moving cylindrical portion 29 and the inner peripheral surface of the outer cylinder 32. Further, a space 40 is provided inside the connecting member 21, and the connecting member 21 is internally cooled by the air supplied from the air pipe 41 that is passed from the base end of the connecting member 21 to heat the gland packing 38 and the O-ring 39. It is designed to prevent deterioration due to.

As shown in FIGS. 4 (a) and 4 (b), a tray 7 mounting portion of the lower heat exchange chamber 4 is provided with a horizontal cross-section window 42 into which the tray 7 is inserted, and the tray 7 is attached to the window 42. The tray 7 is attached to the lid member 43. The tray 7 is formed in a U shape so as to cover the circular cross section of the lower heat exchange chamber 4, and has a large number of through holes 44 on its plate surface.
Is provided. Further, the inner wall 45 of the lower heat exchange chamber 2 is provided with a concave stepped portion 46 which is continuous in the circumferential direction at the same height position as the exit window 42, as in the upper heat exchange chamber 2. Tray 7 made of medium-thickness steel plate and having rigidity
Are directly connected to the stepped portion 46 without a supporting member.

The lower frame portion of the exit window 42 is provided with two inclined holes (inclined passages) 47 which are inclined downward toward the inside of the lower heat exchange chamber 4, and the inclined holes 47 are arranged in accordance with the positions of these inclined holes 47. A notch 48 is provided at the base end of the tray 7. The heat medium 8 that moves and enters the exit window 42 on the tray 7 falls from the notch 48 into the inclined hole 47 and is returned to the lower heat exchange chamber 4.

[0020]

As described above, in the heat exchange device of the present invention, the inclined passage which descends toward the inside of the heat exchange chamber is provided in the tray mounting portion of the heat exchange chamber provided with the window for inserting the tray. Since the heat medium that enters the tray mounting portion is returned from the inclined passage to the heat exchange chamber so that the heat medium does not stay therein, the heat exchanging action of the heat medium can be effectively used, and the heat medium can be transferred to the tray mounting portion. It is possible to prevent the sealability from being deteriorated and the seal member from being damaged by preventing the seal member from entering the gap of the seal member.

[Brief description of drawings]

FIG. 1 is a schematic vertical sectional front view showing an embodiment of a heat exchange device.

2 is an enlarged vertical sectional view showing a main part of the upper heat exchange chamber in FIG. 1, and b is a sectional view taken along line II-II of a.

FIG. 3 is a vertical cross-sectional view showing the tray mounting portion of FIG. 2 in a further enlarged manner.

4 is an enlarged vertical sectional view showing an essential part of the lower heat exchange chamber in FIG. 1, and b is a sectional view taken along line IV-IV of a.

FIG. 5 is a schematic vertical sectional front view showing a conventional heat exchange device.

FIG. 6 is a vertical sectional view showing a tray mounting portion of a conventional heat exchange device.

[Explanation of symbols]

1 high temperature gas 2 heat exchange room 3 low temperature gas 4 heat exchange room 5 communication pipe 6, 7 trays 8 heat medium 9 slot 10 vents 11 exhaust port 12 vents 13 Exhaust port 14 outlet 15 ejectors 16 Blower 17 Conveyor tube 18 hoppers 19 bay window 20 Vibration device 21 Connection member 22 Through hole 23 Inner wall 24 stepped part 25 Support member 26 Inclined groove 27 Notch 28 Lid member 29 Cylindrical part 30 seal cover 31 inner cylinder 32 outer cylinder 33 volts 34 coil spring 35 annular groove 36 nuts 37 holes 38 Grand packing 39 O-ring 40 space 41 air tube 42 bay window 43 Lid member 44 through hole 45 Inner wall 46 Stepped part 47 inclined hole 48 Notch

Claims (3)

(57) [Claims] 1. An upper heat exchange chamber through which a high temperature gas flows and a lower heat exchange chamber through which a low temperature gas flows are provided above and below, and the lower part of the upper heat exchange chamber and the upper part of the lower heat exchange chamber communicate with each other with a small cross section. Part, the trays are attached to each heat exchange chamber in a plurality of stages, and the heat medium introduced from the heat medium inlet provided in the upper heat exchange chamber is supplied to each tray of the upper heat exchange chamber,
In the heat exchange device that sequentially drops the communication part, each tray of the lower heat exchange chamber, and the bottom of the lower heat exchange chamber to exchange heat with the gas flowing through each heat exchange chamber, the high-temperature gas processes waste. Is a high temperature exhaust gas generated when the heat exchange chamber is provided with a tray insertion window on the wall of the tray mounting portion, and the tray mounting portion provided with this window has an inclined passage descending toward the inside of the heat exchange chamber. A heat exchange device characterized by having a section. 2. The heat exchange device according to claim 1, wherein a vibration means is connected to the tray. 3. The heat exchange device according to claim 2, wherein the vibrating means is connected to the tray via a connecting member, and the connecting member is internally cooled.