JP2011099592A - Flow channel switch valve, and heat exchanger and gas treatment device using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a switch valve which can improve flexibility in increasing the size of a device and in which gas leakage hardly occurs, and to provide a heat exchanger and a gas treatment device using the same. <P>SOLUTION: This switch valve 1 for switching and connecting a first flow channel in which a first gas flows and a second flow channel in which a second gas flows, to common ports 2A of a plurality of common flow channels 2, has a housing having a first gas chamber 11 for connecting the first flow channel and the common ports, and a second gas chamber 12 for connecting the second flow channel and the common ports 2A inside of a cylindrical section 15, and further having a first connecting port 11A for connecting the first gas chamber 11 to the common ports 2A and a second connecting port 12A for connecting the second gas chamber 12 to the common port 2A, on a curved face 13 of the cylindrical section 15, a rotating means for rotating the housing on a center of the cylindrical section 15 as an axis, and a seal member 30 disposed at least at a common port 2A side, and slid on the curved face 13 of the cylindrical section 15 in rotating the housing to prevent the first gas and the second gas from mixed with each other. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a switching valve, a heat exchanger using the same, and a gas processing apparatus.

  Conventionally, exhaust gas containing volatile organic compounds (VOC) such as toluene, xylene, styrene, etc. generated in paint factories has a great impact on the environment and human body. Released into the atmosphere.

  The VOC-containing gas detoxification treatment method includes a direct combustion method in which the VOC-containing gas is treated by direct combustion, a catalyst combustion method in which combustion is performed at a low temperature using a catalyst, and heat generated during combustion is untreated exhaust gas. There are regenerative combustion systems that are reused for heating. Among these, the heat storage combustion method has attracted attention from the viewpoint of running cost and maintenance.

  In the heat storage combustion system, untreated exhaust gas is distributed to the heat storage body and preheated, then introduced into the furnace to make it harmless by combustion, and the treated high-temperature exhaust gas is passed again to the heat storage body to store the heat in the heat storage body. When the low-temperature untreated exhaust gas flows, the stored heat is released again to perform heat exchange.

  By the way, the gas passing through the heat accumulator is switched between untreated gas and treated gas by a rotary switching valve. In this switching valve, switching is performed on a plane perpendicular to the rotation axis of the rotating body (see, for example, Patent Document 1).

JP 2005-265321 A

  However, when the amount of gas to be processed increases, the area of the surface orthogonal to the axis of the rotating body increases, and there is a problem that the apparatus becomes large.

  Therefore, an object of the present invention is to provide a switching valve that increases the degree of freedom in increasing the size of the apparatus and is less likely to cause gas leakage, and a heat exchanger and gas processing apparatus using the switching valve.

The switching valve of the present invention is for switching and connecting a first flow path for flowing a first gas and a second flow path for flowing a second gas to a common port of a plurality of common flow paths. A first gas chamber for connecting the first flow channel and the common port, and a second gas chamber for connecting the second flow channel and the common port, inside the unit, A housing in which a first connection port for connecting a first gas chamber to the common port and a second connection port for connecting the second gas chamber to the common port are formed on a curved surface of the cylindrical portion; Rotating means for rotating the casing around the center of the cylindrical portion, and provided at least on the common port side, while sliding with the curved surface of the cylindrical portion when the casing rotates A sealing member for preventing the gas and the second gas from mixing with each other;
It is characterized by comprising.

In this case, a purge chamber formed by the seal member between the adjacent common ports, and a purge gas supply unit that supplies a purge gas to the purge chamber so as to have a positive pressure from the gas pressure of the common port are provided. Is preferred. In addition, it is preferable to provide an elastic body that urges an elastic force so that the seal member contacts the curved surface.
The heat exchanger of the present invention is for exchanging heat between the first flow path for flowing the first gas, the second flow path for flowing the second gas, and the first gas and the second gas. A plurality of heat exchange units, a plurality of common channels for connecting the first channel or the second channel to each of the heat exchange units, and a first channel and a second channel for the plurality of common channels. The above-described switching valve of the present invention that switches and connects two flow paths is provided.
Further, the gas processing device of the present invention includes a first flow path for flowing a first gas, a second flow path for flowing a second gas, a processing section for burning the first gas and exhausting it as the second gas, A plurality of common flows for connecting the first flow path or the second flow path to the processing section, the heat exchange section for exchanging heat between the first gas and the second gas; And a switching valve of the present invention that switches and connects the first channel and the second channel to the plurality of common channels.

  In the present invention, by switching between the first gas and the second gas on the curved surface of the cylindrical portion of the housing, the flow rate of the gas is not only the area of the surface orthogonal to the axis of the rotating body, but also the area of the curved surface of the rotating body. It becomes possible to design by. In other words, the design of the conventional gas processing apparatus can be changed only by the radius of the rotating body, but in the present invention, the design can be changed not only by the radius but also by the height of the rotating body. Therefore, the degree of freedom in device design can be increased and the device can be downsized.

  Further, a purge chamber formed by a seal member is provided between adjacent common ports, and the purge gas is supplied to the purge chamber so as to be more positive than the gas pressure of the common port 2A. The second gas can be reliably prevented from leaking.

It is a partial cross section perspective view which shows the housing | casing of this invention. It is principal part sectional drawing of the switching valve of this invention. It is a general | schematic expanded view which shows arrangement | positioning of the sealing member of this invention. It is a schematic block diagram which shows the gas processing apparatus of this invention.

<Switching valve>
The switching valve of the present invention will be described below with reference to FIGS.

  The switching valve 1 of the present invention is for switching and connecting a first flow path 3 for flowing a first gas and a second flow path 4 for flowing a second gas to a common port 2A of a plurality of common flow paths 2. The casing 10, the rotating means for rotating the casing 10 around the rotation shaft 21, and the seal member 30 for preventing the first gas and the second gas from mixing. Mainly composed.

The casing 10 has a cylindrical portion 15 formed in a cylindrical shape, and a first gas chamber 11 through which the first gas flows and a second gas chamber 12 through which the second gas flows are formed inside the cylindrical portion 15. ing. The curved surface 13 of the cylindrical portion 15 has a first connection port 11A for connecting the first gas chamber 11 to the common port 2A and a second connection port 12A for connecting the second gas chamber 12 to the common port 2A. And are formed. In this case, the positions of the first connection port 11A and the second connection port 12A are preferably formed at opposite positions on the same circumference.
The first gas chamber 11 and the second gas chamber 12 may be formed in any way. For example, as shown in FIGS. 1 and 2, a second cylinder 16 smaller than this cylinder is provided in the cylinder portion 15. What is necessary is just to form the communicating flow path which forms in a nested shape and connects a part of curved surface of the second cylinder 16 and the second connection port 12A. As a result, the first gas chamber 11 is formed as a C-shaped space formed between the cylindrical portion 15 and the second cylinder 16, and the second gas chamber 12 is formed by the communication path with the second cylinder 16. It is formed as a space with a cross-sectional keyhole shape.

  Further, the first gas chamber 11 and the first flow path 3, and the second gas chamber 12 and the second flow path 4 are connected at either one or both of the axial ends of the cylindrical portion 15. Any connection method may be used. For example, as shown in FIG. 1, a third cylinder 17 that is not rotated by a rotating means is provided below the cylindrical portion 15 described above. The third cylinder 17 is formed to be slidable while being sealed by the lower portion of the cylindrical portion 15 and a seal member. Then, a part of the curved surface of the third cylinder 17 is connected to the first flow path 3. Further, a fourth cylinder 18 that does not rotate due to the rotation of the cylindrical portion 15 is provided at the lower portion of the second cylinder 16. The fourth cylinder 18 is formed to be slidable while being sealed by a lower member of the second cylinder 16 and a seal member. Then, the second flow path 4 is connected to a part of the curved surface of the fourth cylinder 18.

  Any rotating means may be used as long as the casing 10 is rotated around the center of the circle of the cylindrical portion 15 as an axis. For example, a rotation shaft 21 may be provided at the center of the circle of the cylindrical portion 15, and the rotation shaft 21 may be formed so as to be rotated by an electric motor. Further, the rotation speed may be set as appropriate according to the switching speed of the switching valve 1.

  The seal member 30 is for preventing the first gas and the second gas from mixing with each other while sliding with the curved surface 13 of the cylindrical portion 15 when the casing 10 rotates. The seal member 30 is preferably one having high slidability and wear resistance, and for example, a carbon seal material can be used.

  The seal member 30 may be arranged in any way as long as it can prevent the first gas and the second gas from mixing with each other. For example, FIG. 3 shows a schematic development view in which the common port side is developed in a planar shape. The seal member 30A seals the adjacent common ports 2A in the axial direction of the cylindrical portion 15, and the common port 2A is the axis of the cylindrical portion 15. Seal members 30B that seal in the circumferential direction at both ends in the direction can be arranged. Thereby, the space between the common port 2A and the cylindrical portion 15 can be surely sealed, not only preventing the first gas and the second gas from mixing with each other, but also the first gas from the switching valve to the outside, It is possible to prevent the second gas from leaking.

  As shown in FIGS. 2 and 3, the purge chamber 31 is formed by the seal member 30 between the adjacent common ports 2A, and the purge gas is supplied to the purge chamber 31 so that the positive pressure is higher than the gas pressure of the common port 2A. A purge gas supply means 32 may be provided. For example, two seal members 30A are arranged between adjacent common ports 2A, and a space (purge chamber 31) closed by the seal member 30A is formed. A nozzle (purge gas supply means 32) for supplying purge gas may be provided in the purge chamber 31, and this nozzle may be connected to a purge gas supply source (not shown), for example, a gas cylinder in which purge gas is stored. As a result, even if a slight gap is generated between the seal member 30 and the housing 10, the purge gas flows from the purge chamber 31 side to the common port 2A side, so that the first gas or the second gas flows to the purge chamber 31 side. The first gas and the second gas can be reliably prevented from leaking without flowing.

  The purge gas may be any gas as long as it does not cause a problem even if it is mixed with the first gas and the second gas. For example, air, nitrogen gas, argon gas, or the like can be used. When the gas pressure of the common port 2A is known in advance, the purge gas pressure may be set in advance so that the purge gas supply becomes a positive pressure rather than the gas pressure. Further, when it is difficult to predict the pressure at the common port 2A, pressure detection means (not shown) for measuring the gas pressure at the common port 2A and the gas pressure in the purge chamber 31 is provided, and information detected by the pressure detection means. Based on the above, the supply amount of the purge gas may be controlled by a control means (not shown) such as a computer.

  Further, the sealing member 30 may be provided with an elastic body 33 that urges an elastic force so that the sealing member 30 contacts the curved surface 13 of the cylindrical portion 15 of the housing 10. Thereby, it is possible to prevent a gap from being generated between the seal member 30 and the housing 10, and reliably prevent the first gas and the second gas from leaking. Any elastic body 33 may be used as long as it can urge the sealing member 30 to abut against the curved surface 13, and for example, a leaf spring can be used.

<Heat exchanger>
Next, the heat exchanger 100 of this invention is demonstrated based on FIG. Since the switching valve is the same as the switching valve 1 of the present invention described above, the same parts are denoted by the same reference numerals and description thereof is omitted.

  The heat exchanger 100 of the present invention includes a first flow path 3 for flowing a first gas, a second flow path 4 for flowing a second gas, and a plurality for exchanging heat between the first gas and the second gas. The heat storage type heat exchanging section 40, the plurality of common flow paths 2 for connecting the first flow path 3 or the second flow path 4 to each heat exchanging section 40, and the plurality of common flow paths 2, the first flow The switching valve 1 of the present invention described above, which connects the path 3 and the second flow path 4 by switching, is mainly configured.

  Here, the first gas and the second gas are two kinds of gases having different temperatures, and the heat exchanger 100 of the present invention is for exchanging heat from a high temperature gas to a low temperature gas. is there.

  The first flow path 3 and the second flow path 4 are designed so that the first gas and the second gas flow in the flow path by a fan or the like, respectively.

  The heat exchanging unit 40 is provided with a heat storage material that takes heat from the high-temperature gas and stores the heat, and radiates the heat to the low-temperature gas. Any heat storage material may be used. For example, a metal such as aluminum or ceramics may be formed in a honeycomb shape, and the first gas or the second gas may be formed so as to pass through the holes of the honeycomb.

  A plurality of heat exchange sections 40 are prepared and are independent of each other. And the 1st flow path 3 and the 2nd flow path 4 are gradually switched with respect to the common flow path 2 connected to this heat exchange part 40 using the switching valve 1 of this invention mentioned above. Thereby, the first gas flows through some of the plurality of heat exchange units 40, and the second gas flows through some of the remaining heat exchange units 40. It will be switched. Then, for example, when the second gas has a higher temperature than the first gas, when the second gas passes through the heat exchanging unit 40, the heat of the second gas is taken away by the heat storage material, and heat is stored in the heat storage material. Next, when the gas flow path connected to the common flow path 2 is switched from the second flow path 4 to the first flow path 3 by the switching valve 1, the first gas passes through the heat exchanging unit 40 and stores heat. The heat stored in the material is taken away and the first gas is heated.

  By configuring the heat exchanger 100 in this way, heat can be efficiently exchanged between the first gas and the second gas while reliably preventing the first gas and the second gas from mixing. it can.

<Gas treatment equipment>
Next, the gas processing apparatus 200 of this invention is demonstrated based on FIG. Since the switching valve is the same as the switching valve 1 of the present invention described above, the same parts are denoted by the same reference numerals and description thereof is omitted. Further, since the heat exchanging part is also the same as the heat exchanging part 40 of the heat exchanger 100 of the present invention described above, the same parts are denoted by the same reference numerals and description thereof is omitted.

  The gas processing apparatus 200 of the present invention includes a first flow path 3 for flowing a first gas, a second flow path 4 for flowing a second gas, a processing unit 50 for burning the first gas and exhausting it as the second gas, A plurality of common flow paths for connecting the first flow path 3 or the second flow path 4 to the processing section 50 having a heat exchange section 40 for exchanging heat between the first gas and the second gas 2 and the above-described switching valve 1 of the present invention that switches and connects the first flow path 3 and the second flow path 4 to the plurality of common flow paths 2.

  Here, the first gas means a combustible gas, for example, a volatile organic compound (VOC) such as methane, toluene, xylene, and styrene. The second gas means a gas generated by combustion in the processing unit 50.

  The processing unit 50 is for burning a first gas such as a volatile organic compound and exhausting it as a harmless or low-toxic second gas, a processing casing 51 for burning the first gas, Combustion means 52 disposed in the processing casing 51 for burning the first gas, a plurality of processing section connection ports provided in the processing casing 10 and connected to the plurality of common flow paths 2, respectively. It is mainly composed of.

  The processing casing 51 may be anything as long as it has strength and heat resistance capable of combusting the first gas, and is appropriately designed according to the processing amount of the first gas.

  The combustion means 52 only needs to have at least an ignition device and a fuel source that supplies an appropriate fuel to the ignition device, and can burn the first gas, and a burner or the like may be used.

  In the gas processing apparatus 200 configured as described above, the first gas flows into the processing casing 51 of the processing unit 50 from the common flow path 2 communicating with the first flow path 3. The first gas that has flowed in is combusted by the combustion means 52 and converted into a second gas. Next, the second gas flows into the common flow path 2 communicating with the second flow path 4. Although the second gas has a high temperature due to combustion, the heat is taken away by the heat storage material of the heat exchange unit 40 in the common flow path 2 and the temperature is lowered. Thereafter, the exhaust gas is exhausted through the switching valve 1 and the second flow path 4. Here, the switching valve 1 gradually switches between the first flow path 3 and the second flow path 4 communicating with the common flow path 2 as the casing 10 rotates. Then, the first gas flows into the common flow path 2 where the second gas has been flowing up to the previous time. The first gas absorbs heat stored in the heat storage material of the heat exchanging unit 40 and the temperature rises. In this way, by recovering heat from the second gas after combustion and using it for heating the first gas, the fuel required by the combustion means 52 can be saved. When the energy of the first gas is large, not only fuel is unnecessary, but also excess heat energy can be used. Further, by applying the switching valve 1 of the present invention to the gas processing apparatus 200, the apparatus does not increase in size even when the gas processing amount increases, and the first gas and the second gas leak. It can be surely prevented.

  If a common channel purge means for purging the gas in the common channel when switching between the first gas and the second gas flowing in the common channel is provided, the first gas and the second gas are further mixed. This is preferable in that it can be surely prevented. For example, as shown in FIG. 2, a recess 35 for flowing purge gas is provided on the curved surface 13 of the cylindrical portion 15 on the rear side in the rotation direction of the first connection port 11A, and the purge gas is supplied to the recess 35. The nozzle is connected to a purge gas supply source (not shown), for example, a gas cylinder in which purge gas is stored. Thus, the common flow path after the first gas flows is purged by the common flow path purge means before being connected to the second connection port 12A. Therefore, when the second gas is supplied, The gas is exhausted. It is also possible to use the second gas instead of the purge gas.

1 switching valve 2 common flow path 2A common port 3 first flow path 4 second flow path
10 housing
11 First gas chamber
11A First connection port
12 Second gas chamber
12A Second connection port
13 Curved surface
15 Cylindrical part
30 Seal material
40 Heat exchanger
50 processor
51 Processing enclosure
52 Combustion means
100 heat exchanger
200 Gas processing equipment

Claims (5)

A switching valve for switching and connecting the first flow path for flowing the first gas and the second flow path for flowing the second gas to the common port of the plurality of common flow paths,
In the inside of the cylindrical portion, having a first gas chamber for connecting the first flow path and the common port, and a second gas chamber for connecting the second flow path and the common port, A housing in which a first connection port for connecting the first gas chamber to the common port and a second connection port for connecting the second gas chamber to the common port are formed on the curved surface of the cylindrical portion. When,
Rotating means for rotating the casing around the center of the cylindrical portion;
A seal member that is provided at least on the common port side and prevents the first gas and the second gas from mixing with each other while sliding with the curved surface of the cylindrical portion when the housing rotates;
A switching valve characterized by comprising: A purge chamber formed by the seal member between the adjacent common ports;
2. The switching valve according to claim 1, further comprising purge gas supply means for supplying a purge gas to the purge chamber so that the pressure is higher than the gas pressure of the common port.   The switching valve according to claim 1, further comprising an elastic body that urges an elastic force so that the seal member contacts the curved surface. A first flow path for flowing a first gas;
A second flow path for flowing a second gas;
A plurality of heat exchange parts for exchanging heat between the first gas and the second gas;
A plurality of common flow paths for connecting the first flow path or the second flow path to each of the heat exchange units;
The switching valve according to any one of claims 1 to 3, wherein the first flow path and the second flow path are switched and connected to the plurality of common flow paths.
The heat exchanger characterized by comprising. A first flow path for flowing a first gas;
A second flow path for flowing a second gas;
A processing section for burning the first gas and exhausting the first gas as the second gas;
A plurality of common flows for connecting the first flow path or the second flow path to the processing section, the heat exchange section for exchanging heat between the first gas and the second gas; Road,
The switching valve according to any one of claims 1 to 3, wherein the first flow path and the second flow path are switched and connected to the plurality of common flow paths.
A gas treatment apparatus comprising:

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