JP3382876B2 - 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. 4, 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
3 are arranged above and below the lower heat exchange chamber 54, and these heat exchange chambers 52, 54 are communicated with each other by a communication section 55 having a small cross section, and the trays 56, 5 are respectively connected to the heat exchange chambers 52, 54.
7 are provided in multiple stages. The granular heat medium 59 is introduced through the inlet 58 provided in the upper heat exchange chamber 52,
In the lower heat exchange chamber 54, the sensible heat recovered from the high temperature gas 51 in the upper heat exchange chamber 52 is sequentially dropped into the trays 56 of the upper heat exchange chamber 52, the communicating portion 55, and the trays 57 of the lower heat exchange chamber 54. The low temperature gas 53 is discharged to heat the low temperature gas 53. The heat medium 59 that has fallen to the bottom of the lower heat exchange chamber 54 is taken out to the outside from the discharge port 60 provided at the bottom, returned to the input port 58 of the upper heat exchange chamber 52 through the transport path 61, and is circulated. .

[0004]

In the heat exchange apparatus of the type described above, the high temperature gas causes waste such as general waste or industrial waste to be incinerated in an incinerator, melted in a melting furnace, or in a pyrolysis furnace. In the case of high-temperature exhaust gas containing adhesive substances such as tar and chloride, which are generated when decomposed, the heat medium may be aggregated by these adhesive substances. If the heat medium agglomerates, its fluidity deteriorates, and there is a risk that the communication part having a small cross section will be blocked.

Therefore, an object of the present invention is to provide a heat exchange device capable of reliably sending the heat medium to the tray of the lower heat exchange chamber even if the heat medium is agglomerated due to the adherent substances in the exhaust gas. Is.

[0006]

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, and the heat medium input port provided in the upper 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 a heat exchange device for heat exchange, the high-temperature gas is high-temperature exhaust gas generated when waste is treated, and a disk driven to rotate is arranged so as to face the lower end opening of the communication part, and drops onto the disk. The structure provided with a scraper that scrapes off the heat medium It was to use.

That is, the heat medium that enters the lower heat exchange chamber from the communicating portion is once dropped onto the rotating disc, and the heat medium that has fallen onto the rotating disc is forcibly scraped off by the scraper, and the heat medium is removed from the lower heat exchange chamber. I made sure to send it to the tray.

By providing a means for dropping the heat medium accumulated in the communication portion downward on the upper side of the disk, the communication portion is prevented from being blocked by the agglomerated heat medium, and the heat medium is more surely transferred to the lower heat exchange chamber. Can be sent to the tray. Since the communication part also has a role of material-sealing the upper and lower heat exchange chambers with a heat medium, it is necessary to store some heat medium in the communication part. However, the exhaust gas of the high-temperature gas contains adhesive substances such as tar and chloride, and these adhesive substances aggregate the heat medium or adhere to the inner surface of the communication part, which causes the heat medium to The above means is effective because it may not smoothly fall from the communicating portion.

As means for dropping the heat medium accumulated in the communicating portion downward, a method of extending the rotary shaft of the disk above the disk and attaching rotary blades to the extended rotary shaft can be adopted.

By providing a means for adjusting the distance between the lower end opening of the communicating portion and the upper surface of the disc, the amount of heat medium scraped off from the disc is adjusted, and an appropriate amount of heat medium is transferred to the lower heat exchange chamber. Can be sent to the tray.

As means for adjusting the distance between the lower end opening of the communicating portion and the upper surface of the disk, a guide tube connected to the communicating portion is provided on the lower end side of the communicating portion, and the guide tube is moved up and down to guide the guide tube. A method of adjusting the distance between the lower end and the upper surface of the disk can be adopted.

By forming the scraper so as to scrape off the heat medium on the disk in a predetermined direction, if the heat medium falling in the predetermined direction is passed through a crushing means or the like,
The heat medium that aggregates with the adhesive substance can be efficiently separated into a simple substance.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to FIGS. 1 and 2 show a first embodiment. In this heat exchange device, as shown in FIG. 1, 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 vertically, and these heat exchange chambers 2, 4 are connected by a communication pipe (communication part) 5, and trays 6 and 7 of perforated plates are provided in a plurality of stages in the heat exchange chambers 2 and 4, respectively. A motor 8 is provided below the communication pipe 5.
A disk 9 that is driven to rotate by is arranged. The granular heat medium 10 is provided at the upper opening of the upper heat exchange chamber 2 through the inlet 1
1, the tray 6 of the upper heat exchange chamber 2, the communication pipe 5, the disk 9, the trays 7 of the lower heat exchange chamber 4, and the bottom of the lower heat exchange chamber 4 are sequentially dropped, and the upper heat exchange chamber 2 The vent 1
Sensible heat is recovered by contact with the high temperature gas 1 flowing from 2 to the exhaust port 13, and the lower heat exchange chamber 4 is ventilated from the vent port 14 to the exhaust port 1.
Release the sensible heat collected in the low temperature gas 3 flowing to 5,
The low temperature gas 3 is heated.

The trays 6 in the upper heat exchange chamber 2 are mounted so as to be inclined, and the heat medium 10 is gradually flowed to the lower tray 6 through the ends and holes of the tray 6 while being flown by the high temperature gas 1. Then, it enters into the communication pipe 5 from the bottom of the cone-shaped upper heat exchange chamber 2, and drops onto the disk 9 arranged above the lower heat exchange chamber 4.

As shown in FIG. 2A, the disk 9 is
Bevel gear 17 attached to the tip of the rotary shaft 16
Then, the rotational torque is transmitted from the drive shaft 18 of the motor 8,
Rotate at low speed. The rotary shaft 16 and the drive shaft 18 have a protective tube 19
Protected by. An air pipe 20 is passed through the center of the rotary shaft 16 so that air is jetted from the upper surface of the disk 9 toward the lower end opening of the communication pipe 5. This air injection is for enhancing the fluidity of the aggregated heat medium 10 so that the heat medium 10 can be smoothly dropped from above the disk 9.

A guide pipe 21 is arranged above the disk 9 to cover the periphery of the lower end opening of the communication pipe 5. The flange 22 of the guide tube 21 is supported by a cam 24 attached to the rotary shaft of a servomotor 23 to move up and down, and a gap 25 between the lower end of the guide tube 21 and the upper surface of the disk 9 is adjusted. This guide pipe 21 can hold a fixed amount of the heat medium 10 in the communication pipe 5 by lowering it to a position where it is substantially in contact with the disk 9 at the end of the operation of the heat exchange device, and when the operation is restarted. The heat medium 10 can be smoothly circulated.

As shown in FIG. 2B, three scrapers 26 are radially arranged on the upper surface side of the disk 9. The heat medium 10 falling from the communication pipe 5 and protruding from the gap 25 is scraped off from the disk 9 by these scrapers 26.

The heat medium 10 scraped off by the scraper 26 is evenly dispersed on the tray 7 of the horizontally mounted lower heat exchange chamber 4 as shown in FIG. , Moves to the lower side through the holes of each tray 7, and falls to the bottom of the lower heat exchange chamber 4. Each tray 7
A vibrating device 27 is attached to the tray to prevent the heat medium 10 from adhering to the tray 7.

The heat medium 10 that has dropped to the bottom of the lower heat exchange chamber 4 is sent from the outlet 28 to the ejector 29, and the air blown by the blower 30 is passed through the carrier pipe 31 and the hopper 32.
And is reintroduced into the upper heat exchange chamber 2 through the inlet 11.

FIGS. 3A and 3B show the second embodiment. This heat exchange device has the same basic configuration as that of the first embodiment, and is different only in the peripheral portion of the communication pipe 5 shown in FIGS. 2 (a) and 2 (b). In this embodiment, the upper wall of the lower heat exchange chamber 4 projects inward from one direction to form the neck portion 33 in the lower heat exchange chamber 4. The neck portion 33 has a rotary blade 3 which is rotated at a high speed by a motor 34.
5 is provided, and a motor 37 for rotating and driving a disk 36 arranged below the communication pipe 5 is installed outside the projecting portion.

The disk 36 is rotated at a low speed by transmitting the rotating torque of the motor 37 by a bevel gear 39 attached to the tip of the rotating shaft 38, and the rotating shaft 38 is rotated by the disk 36.
Is extended above and inserted into the communication pipe 5, and the rotary blade 40 is attached to this extended portion. The rotary blades 40 are for stirring and dropping the heat medium 10 that is aggregated and clogged in the communication tube 5 or attached to the inner surface of the communication tube 5. The rotary shaft 38 is a hollow shaft, and is provided with a plurality of through holes 41 for ejecting air. By ejecting the air supplied from the air pipe 49 from the through holes 41, the fluidity of the condensed heat medium 10 is improved. And the rotation shaft 38 is cooled.

Similar to the first embodiment, a guide tube 42 is arranged above the disk 36, and is guided by a screw 44 which is screwed into a flange 43 of the guide tube 42 and attached to the outer surface of the communicating tube 5. The pipe 42 is moved up and down, and its lower end and the disk 3
The gap with the upper surface of 6 is adjusted.

A curved scraper 45 is arranged on the upper surface side of the disk 36, and the tip of the scraper 45 is arranged so as to face the direction of rotation of the disk 36 indicated by the arrow in FIG. 3B. The rotational position is adjusted by a lever 47 attached to the rotary shaft 46. Communication pipe 5 to disk 3
The heat medium 10 that drops onto 6 is scraped off by the scraper 45 toward the neck portion 33 side where the rotating blades 35 are provided. In addition, the roof surface 48 of the projecting portion is provided with an inclination so that the heat medium 10 falling on the roof surface 48 is rolled down to the neck portion 33 side. The heat medium 10 that has passed through the neck portion 33 is evenly dispersed on the tray 7 of the lower heat exchange chamber 4 while flowing with the low temperature gas 3 as in the first embodiment.

In each of the above-mentioned embodiments, the guide tube which can be moved up and down is arranged at the lower end of the communication tube, and the gap between the lower end opening of the communication section and the upper surface of the rotating disk is adjusted. Then, a method of adjusting the above gap can also be adopted.

[0025]

As described above, in the heat exchange device of the present invention, the heat medium that enters the lower heat exchange chamber from the communicating portion is once dropped onto the rotating disk, and the heat medium that has dropped onto the rotating disk is scratched by the scraper. Since the heat medium is dropped, the heat medium can be reliably sent to the tray in the lower heat exchange chamber.

Further, a means for dropping the heat medium accumulated in the communicating portion downward is provided on the upper side of the rotating disc, and the heat medium is dropped on the rotating disc, thereby preventing the communicating portion from being blocked by the condensed heat medium. It is possible to open the lower end of the communication part,
By providing a means for adjusting the distance from the upper surface of the rotating disk, it is possible to adjust the amount of the heat medium scraped off from the rotating disk and disperse an appropriate amount of the heat medium on the tray.

Further, the scraper is formed so as to scrape off the heat medium on the rotating disk in a predetermined direction, so that the heat medium falling in the predetermined direction is passed through the crushing means or the like to remove the adhesive substance. The aggregating heat medium can be efficiently separated into simple substances.

[Brief description of drawings]

FIG. 1 is a schematic vertical sectional front view showing a heat exchange device according to a first embodiment.

2 is an enlarged vertical sectional view showing an essential part of the heat exchange device of FIG. 1, and b is a sectional view taken along line IIb-IIb of a.

FIG. 3A is a vertical cross-sectional view showing enlarged main parts of the heat exchange device of the second embodiment, and b is a cross-sectional view taken along line IIIb-IIIb of a.

FIG. 4 is a schematic vertical sectional front view showing 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 motor 9 disks 10 heat medium 11 slot 12 vents 13 Exhaust port 14 vents 15 exhaust port 16 rotation axes 17 Bevel Gear 18 drive shaft 19 Protection tube 20 air tubes 21 Guide tube 22 Flange 23 Servo motor 24 cams 25 gap 26 scrapers 27 Vibration device 28 outlet 29 ejector 30 blowers 31 carrier pipe 32 hoppers 33 Neck 34 motor 35 rotating blades 36 discs 37 motor 38 rotation axis 39 Bevel Gear 40 rotating blades 41 through hole 42 Guide tube 43 flange 44 screws 45 scraper 46 rotation axis 47 lever 48 roof 49 Air piping

Claims (6)

(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. And a plurality of trays are provided in each heat exchange chamber, and the heat medium introduced from the heat medium inlet provided in the upper heat exchange chamber is communicated with each tray in the upper heat exchange chamber. Part, each tray of the lower heat exchange chamber, and the heat exchange device that sequentially drops the heat to the bottom of the lower heat exchange chamber to exchange heat with the gas flowing through each heat exchange chamber, and the high-temperature gas processed waste. Heat exchange, which is high-temperature exhaust gas generated at times, is arranged so as to face the lower end opening of the communicating portion, and a rotationally driven disc is disposed, and a scraper for scraping off the heat medium falling on the disc is provided. apparatus. 2. The heat exchange device according to claim 1, wherein a means for dropping the heat medium accumulated in the communication portion downward is provided on the upper side of the disk. 3. The means for dropping the heat medium accumulated in the communicating portion downward extends the rotary shaft of the disk above the disk, and attaches rotary vanes to the extended rotary shaft. The heat exchange device according to. 4. A means for adjusting a gap between a lower end opening of the communicating portion and an upper surface of the disk is provided.
The heat exchange device according to any one of 1. 5. A means for adjusting a distance between a lower end opening of the communication part and an upper surface of the disk is provided with a guide pipe connected to the communication part on the lower end side of the communication part, and the guide pipe is moved up and down to guide the guide pipe. The heat exchange device according to claim 4, which is for adjusting a distance between a lower end of the disk and an upper surface of the disk. 6. The heat exchange device according to claim 1, wherein the scraper is formed so as to scrape off the heat medium on the disk in a predetermined direction.