JPH0235205B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a combustion device used to burn and detoxify gases containing flammable harmful gases such as exhaust from paint booths and deodorizing equipment. The present invention relates to a combustion apparatus provided with a heat exchange tank that alternately exchanges heat between a gas to be treated containing a substance and an exhaust gas from a combustion chamber.

In this type of combustion device, there is a means for rotating a heat exchange medium in a heat exchange tank to sequentially position the medium in a certain combustion gas flow path and an exhaust gas (from the combustion chamber) flow path, and Both methods are known, in which the exchange medium is fixed and the gas flow is switched to exchange heat.

However, in the former rotary type, the combustion chamber side of the heat exchange medium is always exposed to high temperatures of 700 to 800 degrees Celsius, so it is extremely difficult to seal the contact areas between each flow path and the medium, resulting in poor sealing performance. However, since rotating a large amount of media has the disadvantage of requiring too much driving power, it is useful for those with a small amount of air and heat, but cannot be used in the above-mentioned applications due to the above-mentioned disadvantages.

In addition, the latter type of flow path switching type is shown in Fig. 12A,
As shown in Figure 2, the heat exchange tank 07 is connected to the combustion chamber 01
A plurality of ducts 040 are arranged at the outer ends of the heat exchange tanks 07, and the upper and lower ends of the ducts 040 are connected to an annular double combustion gas supply duct 042 via a damper 041. A device having a configuration in which the exhaust gas outlet duct 043 is communicated with is known, but this structure inevitably has the following drawbacks.

Since the heat exchange tank 07 and the duct 041, through which gas flows horizontally, protrude outward from the circumferential direction of the combustion chamber 01, the area occupied by them has to be significantly larger than that of the combustion chamber. do not have.

Since the gas flow in the heat exchange tank 07 is oriented in the horizontal direction, when the apparent volume of the solid material for heat exchange stored in the exchange tank 07 is reduced, a space where no solid material exists is created in the upper part. However, there are disadvantages in that cold combustion gas without heat exchange is supplied to the combustion chamber, or hot exhaust gas is discharged to the outside world.

In addition, there is a drawback that management work is required to eliminate such drawbacks.

Since the damper 041 is heated and cooled by selectively contacting the combustion gas before heat exchange and the exhaust gas after heat exchange, repeated expansion and contraction during use may lead to malfunction of the rotating parts. This has the disadvantage that it is easy to cause an accident in which the unburned gas is released into the outside world.

Further, there is also the drawback that the sealing performance of the damper deteriorates due to repeated expansion and contraction, resulting in the dissipation of unburned gas.

Since two dampers are required for each of the multiple heat exchange tanks, the opening/closing control of the multiple dampers becomes complicated, which has the disadvantage of being prone to operational errors, and the above-mentioned accidents are even more likely to occur. There are drawbacks.

In view of these circumstances, the first invention provides the above-mentioned
The purpose is to eliminate the drawbacks of the flow path switching type and improve the practicality of the flow path switching type.

Further, the second invention aims to eliminate the above-described drawbacks by utilizing the structure of the first invention, and to improve not only the practicality but also the reliability of the flow path switching type.

First, in the combustion apparatus of the first aspect of the invention, in order to achieve the above object, the heat exchange tank includes:
A plurality of storage chambers are arranged in parallel in the horizontal direction, and each of the plurality of storage chambers is filled with a solid material for heat exchange in a ventilable manner, and one upper and lower end of the plurality of storage chambers is filled with the solid material for heat exchange. A combustion chamber is connected to the combustion chamber, and a valve chamber is connected to the other end thereof, and the valve chamber is provided with a gas supply port and an exhaust gas outlet, and the supply port for the storage chamber is provided with a gas supply port and an exhaust gas outlet. A configuration is adopted in which a valve is provided in the valve chamber for selectively switching the communication relationship between the valve and the outlet.

With this configuration, the gas flow in the heat exchange tank is in the vertical direction, so even if the apparent volume of the heat exchange solid material filled in the storage chamber decreases, the gas will reliably flow through this solid material. It has now become possible to ensure heat exchange through circulation. Therefore, there is no longer a risk that cold combustion gases will flow into the combustion chamber or that hot exhaust gases will be discharged to the outside world. Furthermore, by directing the gas flow in the vertical direction in this manner, the area occupied by the entire device can be made equal to, or not much different from, the combustion chamber, making installation easier.

Next, in the combustion device of the second aspect of the present invention, as the valve structure of the first aspect, a wall-shaped valve body is provided in the valve chamber so as to be rotatable about one axis, and the wall-shaped valve body allows the valve body to The chamber is divided into two, and the valve chamber communication ports of the plurality of storage chambers are arranged side by side in the rotational circumferential direction of the wall-like valve body, and the supply port is arranged on one side of the wall-like valve body. The above object has been achieved by adopting a configuration in which the exhaust gas outlet is opened to the other side of the wall-shaped valve body.

By adopting this configuration, not only can the operation and effect of the first invention be achieved, but also the configuration of the first invention allows the combustion gas and the heat to be exchanged at one end of the upper or lower end of the heat exchange tank. By making use of the fact that the exchanged exhaust gas can be brought close to the exhaust gas and easily circulated therein, it has been possible to overcome the above-mentioned drawbacks.

In other words, since the wall-shaped valve body is always in simultaneous contact with the combustion gas before heat exchange and the exhaust gas after heat exchange, the valve body is not subject to large changes in temperature during use. Therefore, malfunctions such as those described above due to thermal fluctuations are less likely to occur, and the rotation operation can be performed extremely smoothly.

In addition, since the communication relationship between the supply ports and the outlets for multiple storage chambers can be changed by rotating this valve body, there is no need for complicated operations such as switching multiple dampers, and there is no risk of operational errors. In addition, since the rotary structure is simple, failures are extremely rare.

Next, embodiments of the present invention will be described.

First Embodiment (See FIGS. 1 to 5) This embodiment is shown as an embodiment common to the first and second inventions.

Reference numeral 1 denotes a combustion chamber, which is constructed as follows.

The burner 2 is placed facing downward in the center of the cylindrical outer wall (top end closed) with the center line facing the vertical direction,
A porous cylinder 3 made of a refractory material is fitted concentrically on the outside of the burner 2. A red-hot wire gauze 4 is arranged on the outside of this cylinder 3, and in this way a combustion section A is constituted.

The space outside the wire mesh 4 is made into a cylindrical ventilation space 6.

The bottom wall 1a of the combustion chamber 1 is open at a portion corresponding to the bottom of the ventilation space 6.

7 is a heat exchange tank, which is constructed as follows.

The outer wall of the combustion chamber 1 and the upper end of the circular cylindrical outer wall are connected and fixed to the lower end of the combustion chamber 1 with bolts 7a.

Inside, an inner cylinder 8 having the same diameter as the combustion section A is arranged concentrically, and the space between the inner cylinder 8 and the outer wall is partitioned into 12 by a second partition wall 9 arranged radially. , 12 storage chambers 10 are provided.

The upper end of each storage chamber 10 communicates with the ventilation space 6.

Each storage chamber 10 has upper and lower heat-resistant perforated plates 11, 11' arranged in a shelf-like manner in the upper and lower intermediate parts thereof, and the inside thereof is filled with heat-resistant metal granules 12, which are an example of a fixing material for heat exchange. It is made to allow ventilation.

The bottom wall 7b of this tank 7 has a large number of small ventilation holes 13 penetrating through the bottom wall 7b at a portion corresponding to the lower end of each storage chamber 10, and a bearing 14 is provided in the center.

15 is a valve chamber, which is constructed as follows.

A rotary switching valve 17 with an upper pivot shaft 16a pivoted on the bearing 14 is disposed in the center of a cylindrical outer wall having the same diameter as the outer wall of the heat exchange tank 7, and there is a gap between the outer circumferential locus of the switching valve 17 and the outer wall. 12 radially at the third partition wall 18...
It is divided into sections.

The compartments divided by the third partition walls 18 are provided below the storage chamber 10, respectively.

At the center of the bottom wall of the valve chamber 15, a large-diameter exhaust gas outlet 19 and a small-diameter combustion gas supply port 20 are arranged concentrically. The lower pivot shaft 16b of the switching valve 17 passes through the center of the supply port 20, passes through an elbow portion of a supply pipe 21 communicating with the supply port 20, and projects to the outside.

Reference numeral 22 denotes an exhaust gas conduit, which communicates with the exhaust gas outlet 19. The switching valve 17 is constructed as follows.

(See Figure 5) The upper and lower pivot shafts 16a and 16b are fixed to the center of both upper and lower edges of the wall-shaped valve body 23, and a ring 24 that fits over the combustion gas supply port 20 is fixed to the lower edge. There is. A first shutoff valve body 25 is provided on one side of the wall-shaped valve body 23 and extends radially outward from the ring 24. The outlet 19 is closed. Further, on the other side of the wall-shaped valve body 23, a second shut-off valve body 26 is provided to close the gap between the ring 24 and the wall-shaped valve body 23. The combustion gas supply port 20 is closed.

Closing plates 27 and 27' having substantially the same width as the inner end interval of the adjacent third partition walls 18 are integrally provided at both left and right ends of the wall-shaped valve body 23.
A disk-shaped guide plate 28 is fixed to the upper surface of the holder.

As described above, the switching valve 17 in the valve chamber 15
The communication relationship between the supply port 20 and the exhaust gas outlet 19 for each storage chamber 10 is sequentially switched by the rotation of .

Second embodiment (see Fig. 6) Valve chamber 15 and switching valve 17 in the first embodiment
The configuration is changed as follows, and the rest is the same as the first embodiment. The third partition wall 18 is not provided in the valve chamber 15, and the width of the wall-shaped valve body 23 is made the same as the inner diameter of the valve chamber 15.

A fan-shaped closing body 2 having the same shape and size as the cross-sectional shape of one storage chamber 10 is attached to the upper edge of this wall-shaped valve body 23.
9, 29' are fixed close to the lower surface of the storage chamber 10.

Third Embodiment (See FIG. 7) In the second embodiment, the switching valve 17 is constructed as follows, and the other structures are substantially the same as those of the second embodiment.

A wall-like valve body 23 is provided in a bottomed cylindrical body 30 that is housed in the valve chamber 15, and a wall-like valve body 23 is provided at the bottom of the cylinder 30 on one side of the wall-like valve body 23, facing the exhaust gas outlet 19. A first opening 31 is formed at the bottom of the cylindrical body 30 on the other side.
A second opening 32 facing 0 is formed.

29, 29' are sector-shaped closures.

Fourth embodiment (see FIG. 8) In the first embodiment, the valve chamber 15 and the switching valve 1
7 is constructed as follows, and the rest is the same as in the first embodiment.

Note that this example is an example of the first invention.

The inside of the valve chamber 15 is divided into twelve sections by a third partition wall 18, and an inner cylinder 33 is provided in which the inner end of the third partition wall 18 is integrated. A combustion gas supply port 20 and an exhaust gas outlet 19' are provided on the outer wall of each chamber partitioned in this way, and a slide valve body 34 is provided to selectively open and close both ports 19' and 20'. .

Fifth Embodiment (See FIG. 9) In the first to fourth embodiments, the combustion chamber 1 is constructed as follows. The rest is the same as in the previous embodiments.

Various structures of the combustion part 1A of the combustion chamber 1 are housed in the upper part of the inner cylinder 8 of the heat exchange tank 7, and a large number of ventilation holes 35 are formed in the upper part of the inner cylinder 8 in which the combustion part A is housed. Further, the heat exchange tank 7 is hermetically sealed with a closing lid 36 to which the burner 2 is fixed in the center.

Sixth Embodiment (See FIG. 10) The valve chamber 15 of the first embodiment is constructed as follows. The rest is the same as the first embodiment.

A partition 37 having a bearing 14 at the center is fixed to the lower middle part of the inner cylinder 8 of the heat exchange tank 7, and the switching of the first embodiment is carried out in the inner space of the inner cylinder 8 below the partition 37. A switching valve 17 having the same structure as the valve 17 is housed with the upper shaft 16a supported by the bearing 14.
Then, the bottom of the heat exchange tank 7 is connected to the supply port 20 and the outlet 1 in the same way as the bottom wall of the valve chamber 15 in the first embodiment.
It is closed with a bottom wall 38 having 9 etc. arranged thereon.

Further, a large number of ventilation holes 39 are formed in the lower part of the inner cylinder 8, and the lower part of the inner cylinder 8 is used as a valve chamber.

Note that this embodiment may also be implemented in combination with the fifth embodiment.

In the above embodiments, the configuration may be changed by one or more of the following combinations.

As the heat exchange solid material 12 filled in the storage chamber 10, any one or a combination of the following materials may be used.

Heat-resistant agglomerates such as magnetic materials, Raschig rings, and alumina agglomerates, molded bodies such as grids, nets, and rods made of heat-resistant materials, and heat-resistant fibrous bodies such as glass wool, steel wool, and asbestos.

The storage chamber 10 does not necessarily need to be divided into multiple stages using perforated plates 11, 11', etc., but if it is divided, it is not limited to three stages, but may be divided into two, four, or more stages.

Heat exchange tank 7 between the valve chamber 15 and the combustion chamber 1
Reverse the vertical arrangement of the above.

Among the various embodiments of the switching valve 17, the wall-shaped valve body 2
3, the number of storage chambers 10 communicating with the combustion gas supply port 20 and the number of storage chambers 10 communicating with the exhaust gas outlet 19 should be different from each other.

As a specific means, the closing plates 27, 2
7' or the fan-shaped closing bodies 29, 29' are both provided close to one side of the wall-shaped valve body 23, or the wall-shaped valve body 23 is formed into a dogleg shape or an arc shape in plan view. .

Note that the storage chamber 1 that communicates with the exhaust gas outlet 19
0 in the storage chamber 1 communicating with the supply port 20.
It is preferable to make the number larger than 0. The ratio may be determined depending on the performance and heat exchange efficiency of the burner 10.

The number of storage chambers 10 is not necessarily limited to 12, but may be an appropriate number of 2 or more.

The combustion chamber 1, heat exchange tank 7, cylinder 8, valve chamber 1
The cross-sectional shape of item 5 is not limited to a circle, but should be polygonal.

Note that the valve chamber 15 in the second and third embodiments
The inner cylinder 8 in the sixth embodiment needs to be circular.

Since the temperature of the portion of the storage chamber 10 on the valve chamber 7 side is low, it is not necessary for the solid material 12 to have heat resistance in this portion, so a material molded of synthetic resin or the like is used. Also good.

Note that when synthetic resin is used in this way, if abnormal combustion unexpectedly occurs in the combustion chamber 1 and high-temperature gas is discharged, the solid material 12 of the synthetic resin will melt and the storage chamber 10 will melt. By closing the valve chamber 7 or providing a large flow resistance, it is possible to automatically suppress abnormal combustion and prevent high-temperature exhaust gas from being discharged.

As shown in FIGS. 11A and 11B, the burner 2 is installed on the side of the cylindrical combustion chamber 1 so as to eject high-temperature combustion gas substantially along the tangential direction of the cylindrical combustion chamber 1. In this case, the number of burners 2 is not limited to one, but two or more burners may be provided.
Alternatively, the inner cylinder 8 or a similar inner cylinder may be located at the center of the combustion chamber 1 to form the combustion chamber 1 into a donut shape.

[Brief explanation of drawings]

The drawings illustrate embodiments of the combustion apparatus according to the present invention, and FIG. 1 is a longitudinal sectional side view showing the first embodiment, FIG. 2 is a sectional view taken along the line taken from FIG. 1, and FIG. 3 is taken from FIG. Line sectional view, Figure 4 is a line sectional view taken from Figure 1,
FIG. 5 is a perspective view showing the switching valve of the first embodiment;
The figure is a partially cutaway perspective view showing the valve chamber of the second embodiment.
FIG. 7 is a partially cutaway perspective view showing the valve chamber of the third embodiment, FIG. 8 is a longitudinal side view showing the valve chamber of the fourth embodiment, and FIG. 9 is a combustion chamber of the fifth embodiment. 10 is a vertical side view showing the valve chamber of the sixth embodiment, and FIG. 11 shows another embodiment of the combustion chamber, in which A is a longitudinal side view and B is a low-low line of A. FIG. 12A is a longitudinal sectional side view showing a conventional example, and FIG. 12B is a plan view showing the conventional example. DESCRIPTION OF SYMBOLS 1... Combustion chamber, 7... Heat exchange tank, 10... Storage chamber, 12... Solid material, 15... Valve chamber, 19... Exhaust gas outlet, 20... Burned gas supply port, 17...
...Switching valve, 23...wall-shaped valve body.

Claims (1)

[Scope of Claims] 1. In a combustion apparatus provided with a heat exchange tank for mutually exchanging heat between the gas to be treated containing combustion substances in the combustion chamber and the exhaust gas from the combustion chamber, the heat exchange tank includes: , a plurality of storage chambers are arranged in parallel in the horizontal direction, and each of the plurality of storage chambers is filled with a solid material for heat exchange in a ventilable manner, and one upper and lower end of the plurality of storage chambers is filled with a solid material for heat exchange. The combustion chamber is connected to the combustion chamber, and the other end thereof is connected to the valve chamber, and the valve chamber is provided with a gas supply port and an exhaust gas outlet, and the supply gas to the storage chamber is connected to the combustion chamber. A combustion device in which a valve is provided in the valve chamber for selectively switching the communication relationship between the port and the outlet. 2. According to claim 1, the heat exchange tank has a cylindrical shape with a center line directed in the vertical direction, and the inside is radially divided by partition walls to form a plurality of storage chambers. Combustion device as described. 3. The combustion device according to claim 1 or 2, wherein the storage chamber is vertically divided into multiple stages by a perforated plate. 4. In a combustion apparatus that is provided with a heat exchange tank that mutually exchanges heat between the gas to be treated containing combustion substances in the combustion chamber and the exhaust gas from the combustion chamber, the heat exchange tank includes a plurality of Storage chambers are arranged in parallel, and each of the storage chambers is filled with a solid material for heat exchange in a ventilated state, and the combustion chamber is connected to one upper and lower end of the plurality of storage chambers. A valve chamber is connected to the other end, and the valve chamber is provided with a combustion gas supply port and an exhaust gas outlet. A valve body is provided, and the valve chamber is divided into two by the wall-like valve body, and the valve chamber communication ports of the plurality of storage chambers are arranged in parallel in the rotational circumferential direction of the wall-like valve body. The combustion device also has the supply port opened on one side of the wall-shaped valve body, and the exhaust gas outlet opened on the other side of the wall-shaped valve body. 5. According to claim 4, the heat exchange tank has a cylindrical shape with a center line directed in the vertical direction, and the inside is radially divided by partition walls to form a plurality of storage chambers. Combustion device as described. 6. The combustion device according to claim 4 or 5, wherein the storage chamber is vertically divided into multiple stages by a perforated plate.