JP6041105B2 - Thermal storage exhaust gas purification system - Google Patents

Description

  The present invention relates to a heat storage type exhaust gas purification device that purifies exhaust gas using a heat storage body.

  Volatile organic compounds (bonding industry (laminate packaging, adhesive tape, etc.) facilities, printing industry (gravure printing, offset printing) facilities, painting facilities, chemical factories, electronics / ceramics facilities, factory cleaning facilities, etc. Exhaust gas containing flammable harmful components such as VOC (Volatile Organic Compounds) is generated. In order to purify this exhaust gas, conventionally, for example, an exhaust gas purification device as described in Patent Document 1 has been used.

  A conventional exhaust gas purifying apparatus includes, for example, an air supply / exhaust port to which a pair of air supply / exhaust valves are attached, a plurality of heat storage chambers provided with heat storage bodies, and a combustion chamber communicating above the heat storage chambers. ing. In this exhaust gas purification device, exhaust gas purification processing is performed by switching the exhaust gas supply / exhaust valve to the operation by switching the supply / exhaust valve of the heat storage chamber.

  By the way, since the temperature of the gas which distribute | circulates the inside of an apparatus is high from the function and a use, there existed a request to suppress generation | occurrence | production of the malfunction by the heat | fever in each component which comprises an exhaust gas purification apparatus.

Japanese Patent Laid-Open No. 2004-77017

  An object of the present invention is to provide a regenerative exhaust gas purification device that can reduce the occurrence of problems due to the heat of gas flowing inside the device.

In order to achieve the above object, the present invention provides a heat storage type exhaust gas purification device that purifies exhaust gas using a heat storage body, and combusts the exhaust gas, and one end of each of the combustion chambers. A plurality of heat storage chambers that communicate with each other, a supply on / off valve that is provided at the other end of each of the plurality of heat storage chambers and supplies a gas to be treated to the heat storage chamber, and each other end of each of the plurality of heat storage chambers A discharge on / off valve for discharging the gas to be processed from the heat storage chamber, a heat storage body provided in each of the plurality of heat storage chambers, an exhaust duct connected to the discharge on / off valve, and the exhaust duct and combustion A bypass duct provided to communicate with the chamber, and the bypass duct is provided with a first flow rate adjusting valve for adjusting a flow rate of the exhaust gas flowing out from the combustion chamber to the exhaust duct. The first flow control valve is installed on the side The obtained region, mounted compact of heat insulating material, portions bypass duct of the exhaust duct are connected, the inner cylindrical member to divide the area of the exhaust duct inner region thereof and its outer area It is provided, and exhaust gas flows out from the bypass duct into a region inside the inner cylinder member of the exhaust duct .
In the regenerative exhaust gas purification apparatus of the present invention configured as described above, a bypass duct that communicates the exhaust duct and the combustion chamber is provided, and the exhaust duct is discharged from the combustion chamber by the first flow rate adjusting valve provided in the bypass duct. Since the flow rate of the exhaust gas flowing out to the exhaust gas is adjusted, when excess heat is generated in the combustion chamber, the high temperature exhaust gas can be discharged from the combustion chamber to the exhaust duct to protect the equipment. Further , in the present invention, since the molded body of the heat insulating material is attached to the region where the first flow rate adjustment valve is provided on the inner side surface of the bypass duct, there is a problem due to the heat of the exhaust gas flowing through the inside of the bypass duct. The occurrence of (thermal deformation, cracking, peeling of surface coating, corrosion of steel plate, etc.) can be reduced, and the service life of the bypass duct can be extended. Furthermore, in the present invention, an inner cylinder member that divides a region in the exhaust duct into an inner region and an outer region is provided at a portion to which the bypass duct of the exhaust duct is connected. Since the relatively low temperature exhaust gas passes through the outer area and the exhaust gas that flows out from the relatively high temperature bypass duct passes through the area inside the exhaust duct, the wall of the exhaust duct flows out from the bypass duct. There is no direct exposure to exhaust gas. As a result, according to the present invention, deformation of the exhaust duct and peeling of the surface coating can be prevented.

In the present invention, it is preferable that the molded body of the heat insulating material is a molded body of ceramic fiber formed in a cylindrical shape.
In the present invention configured as described above, since the molded body of the heat insulating material is a molded body of ceramic fiber formed in a cylindrical shape, the problem due to the heat of exhaust gas that circulates inside the bypass duct more effectively described above. The occurrence of (thermal deformation, cracking, peeling of surface coating, corrosion of steel plate, etc.) can be reduced, and the service life of the bypass duct can be extended.

In the present invention, it is preferable that the first flow rate adjusting valve has a rotating shaft fixed to the inner surface of the bypass duct so as to be rotatable, a valve body fixed to the rotating shaft, and a ceramic fiber on the inner surface of the bypass duct. And an abutting member that abuts against the valve body when the valve body is rotated and closed.
In the present invention configured as described above, the abutting member that abuts the valve body when the valve body is rotated and closed is protruded inward from the ceramic fiber molded body on the inner surface of the bypass duct. Since it is provided, the connecting portion between the abutting member and the inner surface of the bypass duct is kept warm by the ceramic fiber molded body and is not directly heated by the high-temperature exhaust gas.

In the present invention, preferably, the bypass duct is a curved path curved from the first flow control valve to the exhaust duct so that the time for exhaust gas to reach from the first flow control valve to the exhaust duct is a predetermined time. .
In the present invention configured as described above, by using a curved path curved from the first flow rate adjustment valve to the exhaust duct, the time for exhaust gas to reach the exhaust duct from the first flow rate adjustment valve becomes a predetermined time. Since it did in this way, also when processing gas with strong odors, such as ethyl acetate, it can guide to an exhaust duct in the state always always completely decomposed | disassembled (complete combustion) irrespective of the operating condition.

  In the present invention, preferably, the predetermined time is 0.1 second to 1.5 seconds.

Preferably, the present invention preferably further includes a heat recovery device provided outside the combustion chamber for recovering heat generated in the combustion chamber, and a heat recovery device provided so as to communicate the combustion chamber and the heat recovery device. The heat recovery bypass duct is provided with a second flow rate adjustment valve that adjusts the flow rate of the exhaust gas flowing out from the combustion chamber to the heat recovery device.
In the present invention configured as described above, since the heat recovery device for recovering the heat generated in the combustion chamber is provided, the flow rate is adjusted by the second flow rate adjusting valve, and the necessary amount of heat is discharged from the combustion chamber. Can be recovered and used for other purposes.

The present invention preferably further includes a third flow rate adjusting valve provided upstream of the connection position of the exhaust duct with the bypass duct, a pressure detector for detecting the pressure in the combustion chamber, and the pressure detector. And a control unit that controls the opening of the third flow rate control valve based on the detected pressure.
In the present invention configured as described above, the static pressure in the combustion chamber can be adjusted by controlling the opening of the third flow rate adjusting valve, thereby stabilizing excess heat with respect to the heat recovery device. Can be supplied automatically.

In the present invention, preferably, at least one of the supply on-off valve and the discharge on-off valve is a poppet on-off valve, and the poppet on-off valve has a first inclination with respect to the posture of the closed valve body. It is opened so that it gradually tilts in the direction, and when it moves further in the opening direction, it is gradually moved so as to be parallel to the posture of the closed valve body, and when it further moves in the opening direction, An opening operation is performed so as to gradually incline in a second inclination direction that is opposite to the first inclination direction.
According to the present invention configured as described above, at least one of the supply on-off valve and the discharge on-off valve is a poppet type on-off valve, and the poppet type on-off valve corresponds to the posture of the valve body in the closed state. When the valve is moved in the first tilting direction, the valve is gradually moved so as to be parallel to the posture of the closed valve body and further moved in the opening direction. When opening and closing, since it is configured to open so as to gradually incline in a second inclination direction that is opposite to the first inclination direction, it is possible to warm up the static pressure fluctuation during opening and closing. it can.

In the present invention, preferably, the valve body of the poppet type opening / closing valve is provided with a weight so that the valve body is inclined in the first inclination direction, and the valve body is located at a position symmetrical to the position where the weight is provided. A restricting member is provided to prevent the abutting portion of the valve body from rising due to contact, and the valve body is operated to be parallel to the posture of the closed valve body by contacting the restricting member. The
In the present invention configured as described above, the valve body of the poppet type open / close valve is provided with a weight so that the valve body is inclined in the first inclination direction, and a position symmetrical to the position where the weight is provided. Since a restricting member is provided to prevent the abutting portion of the valve body from being raised due to contact with the valve body, the static pressure fluctuation at the time of opening and closing is reliably warmed by a relatively simple structure. Can be.

The present invention preferably further includes a first casing and a second casing that are connectable and separable, wherein the combustion chamber and the heat storage body are provided in the first casing, and the supply on-off valve and the discharge are provided. An on-off valve is provided in the second housing.
In the present invention configured as described above, the first housing and the second housing that can be coupled and separated are provided, the combustion chamber and the heat storage body are provided in the first housing, and the supply on-off valve And the discharge on-off valve is provided in the second casing, so that the first casing and the second casing can be separated into each other, and can be carried into the site. Assembly operation can be minimized. As a result, according to the present invention, it is possible to shorten the construction period at the site and also shorten the entire construction period.

  According to the regenerative exhaust gas purification apparatus of the present invention, it is possible to reduce the occurrence of problems due to the heat of gas flowing through the apparatus.

FIG. 1 is a view for explaining the inside of a regenerative exhaust gas purification apparatus according to an embodiment of the present invention. 1A is a cross-sectional view corresponding to the front view, and is a cross-sectional view taken along the line AA shown in FIG. FIG. 1B is a cross-sectional view taken along the line BB shown in FIG. FIG. 1C is a cross-sectional view taken along the line CC shown in FIG. FIG. 1D is a DD cross-sectional view shown in FIG. FIG. 2 is a view for explaining in detail the exhaust duct and the bypass duct in the heat storage type exhaust gas purifying apparatus according to the embodiment of the present invention. 2A is a cross-sectional view of the regenerative exhaust gas purification device, and FIG. 2B is a diagram showing an attached state of the inner cylinder member of the exhaust duct, and is taken along line X1-X1 in FIG. It is sectional drawing seen along. FIG. 3 is a view for explaining a molded body of a heat insulating material provided in the bypass duct in the regenerative exhaust gas purification apparatus according to the embodiment of the present invention. FIG. 3A is a cross-sectional view of a bypass duct provided with a first flow control valve. FIG. 3B is a cross-sectional plan view of the bypass duct in the region where the first flow control valve is provided. FIG. 3C is an enlarged cross-sectional view showing a portion X2 in FIG. FIG. 3D is an enlarged cross-sectional view illustrating a portion X3 in FIG. FIG. 4 is a view showing a bypass duct of a comparative example. FIG. 4A is a cross-sectional view of a bypass duct of a comparative example. FIG. 4B is an enlarged cross-sectional view showing a portion X4 in FIG. FIG. 4C is an enlarged cross-sectional view showing a portion X5 in FIG. FIG. 5 is a cross-sectional view showing a bypass duct according to a first modification that is connected from the side of the combustion chamber. FIG. 6 is a cross-sectional view showing a heat storage type exhaust gas purifying apparatus including a bypass duct according to a second modified example having a curved shape. FIG. 7 is a diagram for illustrating division positions of the regenerative exhaust gas purification apparatus according to the embodiment of the present invention. FIG. 7A is a front view. FIG. 7B is a left side view. FIG. 7C is a right side view. FIG. 8 is a diagram showing details of the division position of the regenerative exhaust gas purification apparatus according to the embodiment of the present invention. FIG. 8A is an enlarged view showing a PPA portion of FIG. FIG. 8B is an enlarged view showing the PPB portion of FIG. FIG. 8C is an enlarged view showing the PPC portion of FIG. FIG. 8D is an enlarged view showing the PPD portion of FIG. FIG. 8E is an enlarged view showing the PPE portion of FIG. FIG. 8F is an enlarged view showing the PPF portion of FIG. FIG. 9 is a front view of the regenerative exhaust gas purification apparatus divided at the dividing position shown in FIG. FIG. 10 is a left side view of the regenerative exhaust gas purification apparatus divided at the division position shown in FIG. FIG. 11 is a diagram for explaining the lower unit. FIG. 11A is a front view. FIG. 11B is a left side view. FIG. 11C is a right side view. FIG. 11D is a cross-sectional view taken along line EE illustrated in FIG. FIG. 12 is a diagram for explaining the upper unit. FIG. 12A is a front view. FIG. 12B is a cross-sectional view taken along line FF shown in FIG. FIG. 12C is a right side view. FIG. 12D is a plan view. FIG. 13 is a view for explaining opening / closing valves provided at the supply port and the discharge port of the regenerative exhaust gas purification apparatus according to the embodiment of the present invention. FIG. 13A is a sectional view showing an on-off valve having a conventional structure for comparison with the embodiment of the present invention. FIG. 13B is a cross-sectional view showing an on-off valve provided in the heat storage type exhaust gas purifying apparatus according to the embodiment of the present invention. FIG. 14 is a view showing a heat storage type exhaust gas purifying apparatus according to another embodiment of the present invention provided with a heat recovery bypass duct. FIG. 15 is a cross-sectional view showing an open / close valve that can moderate fluctuations in static pressure during opening and closing, which is a modification of the open / close valve that serves as an air supply / exhaust valve of the heat storage type exhaust gas purification device.

  Hereinafter, a heat storage type exhaust gas purifying apparatus according to an embodiment of the present invention will be described with reference to the drawings. First, a heat storage type exhaust gas purifying apparatus according to an embodiment of the present invention will be described with reference to FIG. Reference numeral 1 denotes a heat storage type exhaust gas purification device, and this heat storage type exhaust gas purification device 1 is suitable for processing components that can be burned and oxidized, such as organic volatile compounds.

  As shown in FIG. 1, a heat storage type exhaust gas purification apparatus 1 includes a combustion chamber 10 provided with a burner and a plurality of heat storage chambers 11, 12 that are connected to and communicated with one end (upper end) of the combustion chamber 10. And. Heat storage bodies 26 and 27 are provided between one end (upper end) and the other end (lower end) of each of the plurality of heat storage chambers 11 and 12.

  In FIG. 1, arrows indicate gas flows. In this example, exhaust gas (treated gas) is supplied to the heat storage chamber 12, and exhaust gas (treated gas) is discharged from the heat storage chamber 11. It has become. The supply of exhaust gas to the heat storage chambers 11 and 12 and the discharge of exhaust gas from the heat storage chambers 11 and 12 are switched. In FIG. 1, “IN” indicates supply of exhaust gas to the regenerative exhaust gas purification apparatus 1, and “OUT” indicates discharge of processed gas.

  The regenerative exhaust gas purification apparatus 1 is provided with supply on / off valves 14 and 15 at the other ends (lower ends) of the plurality of heat storage chambers 11 and 12, respectively. Supply ports 20 and 21 for supplying the gas to be processed are formed. Similarly, discharge open / close valves 16 and 17 are provided at the other ends (lower ends) of the plurality of heat storage chambers 11 and 12, respectively, and the processed gas is discharged to these discharge open / close valves 16 and 17. Discharge ports 22 and 23 are formed.

  The regenerative exhaust gas purification apparatus 1 includes an exhaust duct 83 connected to the discharge ports 22 and 23, and a bypass duct 31 that communicates the combustion chamber 10 and the exhaust duct 83. The exhaust duct 83 is a passage for discharging the treated gas from the regenerative exhaust gas purification apparatus 1 and leading it to a predetermined place. The bypass duct 31 is a bypass passage that communicates the combustion chamber 10 with the discharge sides of the discharge ports 23 and 24. The bypass duct 31 includes a first flow rate adjustment valve 34 that is provided in the upper portion of the combustion chamber 10 and adjusts the flow rate of exhaust gas flowing out from the combustion chamber 10 to the exhaust duct 83. The first flow rate adjusting valve 34 is a butterfly valve, and the flow rate of the fuel gas can be adjusted by the amount of rotation of the valve body 93.

  As shown in FIGS. 2 (A) and 3 (A), a molded body 91 of a heat insulating material is provided in the region where the first flow rate adjustment valve 34 is provided on the inner surface of the bypass duct 31. The heat insulating material molded body 91 is preferably a ceramic fiber molded body formed in a cylindrical shape.

  Here, the first flow rate adjusting valve 34 will be described with reference to FIG. The first flow rate adjusting valve 34 includes a rotary shaft 92 fixed to the inner surface of the bypass duct 31 so as to be rotatable, a valve body 93 fixed to the rotary shaft 92, a contact member 94, and an actuator 99. Have. The rotation shaft 92 is provided in a direction orthogonal to the longitudinal direction of the bypass duct 31. The abutting member 94 is provided on the inner side surface (an inner cylinder portion 95 described later) of the bypass duct 31 so as to protrude inward from the ceramic fiber molded body 91, and when the valve body 93 is rotated and closed. It comes into contact with the valve body 93.

  The first flow rate adjusting valve 34 rotates the valve body 93 by the rotating shaft 92 to adjust the flow rate of the exhaust gas flowing through the bypass duct 31 and causes the valve body 93 to contact the contact member 94 to bypass. The flow of the exhaust gas in the duct 31 is stopped.

  As shown in FIG. 3, the bypass duct 31 has an inner cylinder part 95 and an outer cylinder part 96, and a heat insulating material 97 such as rock wool is packed between them. The heat insulating material 97 is not limited to this, and may be a ceramic fiber board or the like.

  The ceramic fiber molded body 91 described above is provided inside the inner cylinder portion 95. Further, the contact member 94 is integrated inside the inner cylinder portion 95 by welding or the like. The contact member 94, the inner cylinder portion 95, the rotating shaft 92, and the valve element 93 are all members having a predetermined strength, and are made of stainless steel that is resistant to corrosion. The outer cylinder 96 is also a member having a predetermined strength, and is formed of SS400 (general structural rolled steel) or the like.

  As shown in FIG. 3C, in order for the contact member 94 to protrude inward from the inner surface of the ceramic fiber molded body 91, the ceramic fiber molded body 91 includes at least an upper portion 91a and a lower portion 91b. It has a divided structure consisting of two members.

  Here, as shown in FIG. 2, a heat insulating material 102 such as rock wool is provided on the inner surface of the outer wall 101 of the combustion chamber 10, and a ceramic fiber board 103 is provided on the inner side thereof. Further, a stud pin (not shown) is provided on the outer wall portion 101 toward the inside, and the heat insulating material 102 and the ceramic fiber board 103 are fixed by fixing a presser plate to the stud pin.

  As shown in FIG. 3C, the upper portion 91 a of the ceramic fiber molded body 91 described above is supported by a contact member 94. The lower portion 91 b is supported by a support member 104 that is screwed to the outer wall portion 101 of the combustion chamber 10.

  Next, the advantage by providing the molded object (ceramic fiber molded body 91) of a heat insulating material in the area | region in which the 1st flow regulating valve 34 of the inner cylinder part 95 of the bypass duct 31 was provided is demonstrated. FIG. 6 shows a bypass duct 331 of a comparative example for comparison with the bypass duct 31 (see FIG. 2) according to the present embodiment. An adjustment valve 334 is provided in the bypass duct 331 of the comparative example of FIG. The adjustment valve 334 includes a rotating shaft 392, a valve body 393, and a contact member 394.

  The bypass duct 331 of the comparative example has an inner cylinder part 395, an outer cylinder part 396, and a heat insulating material 397. The contact member 394 is welded to the inner cylinder portion 395. Although the inner cylinder part 395 shown in FIG. 4 is made of stainless steel or the like, the inner cylinder part 395 is in direct contact with high-temperature exhaust gas, so that thermal deformation may occur and cracks or the like may occur. Further, the deformation and cracking may cause problems such as peeling of the surface coating of the outer cylinder 396 and corrosion and breakage of the steel sheet, which may require replacement and repair.

  On the other hand, in the regenerative exhaust gas purification apparatus 1 according to the present embodiment, as described above, since the ceramic fiber molded body 91 is provided inside the inner cylinder portion 95, the gas flowing through the bypass duct 31 is used. It is possible to reduce the occurrence of defects due to the heat of. Thereby, the service life of the bypass duct 31 can be extended.

  Moreover, in the bypass duct 331 of the comparative example, the inner cylinder part 395 is attached to the attachment member 404 welded to the outer wall part 401 of the combustion chamber 310 by welding. When the inner cylinder part 395 is thermally expanded due to the passage of exhaust gas, the outer wall part 401 and the outer cylinder part 396 are not heated so much, and stress is repeatedly generated in the welded part and the like. Thereby, a crack etc. may generate | occur | produce in the inner cylinder part 395 or its attaching part.

  On the other hand, in the regenerative exhaust gas purification apparatus 1 according to the present embodiment, as described above, since the ceramic fiber molded body 91 is provided inside the inner cylinder portion 95, the gas flowing through the bypass duct 31 is used. It is possible to reduce the occurrence of defects due to the heat of. Thereby, the service life of the bypass duct 31 can be extended.

  Further, in the bypass duct 331 of the comparative example, the joint portion of the contact member 394 and the inner cylinder portion 395 is welded. This weld is directly heated to the hot gas. A force is applied to the inner cylindrical portion 395 side by the valve body 393 that closes in this state. Thereby, damage may occur in the welded portion.

  On the other hand, in the regenerative exhaust gas purification apparatus 1 according to the present embodiment, as described above, the ceramic fiber molded body 91 keeps the abutting member 94 and the welded portion of the inner cylinder portion 95 warm. Can be prevented.

  Next, a bypass duct 31 according to a first modification will be described with reference to FIG. In the regenerative exhaust gas purification apparatus 1 according to the present embodiment, the bypass duct 31 may be connected from the side surface of the combustion chamber 10. In the case of the first modification, the molded body 91 of the heat insulating material is fixed by the mounting member 110. Also in the bypass duct 31 according to the first modification, the heat insulating material molded body 91 has the same effect as described above.

  Next, referring to FIG. 2, the connection portion between the exhaust duct and the bypass duct will be described in detail. In the regenerative exhaust gas purification apparatus 1 according to the present embodiment, the inner cylinder member 120 is provided in a portion where the bypass duct 31 of the exhaust duct 83 is connected. The inner cylinder member 120 has a cylindrical shape with both ends open, and an opening is formed on the surface facing the bypass duct 31. The exhaust duct 83 is divided into an inner region 120a and an outer region 120b by the inner cylinder member 120 in the cross-sectional direction. The inner cylinder member 120 is attached to the exhaust duct 83 by fixing a mounting plate 121 provided on the inner surface of the exhaust duct 83 and a mounting plate 122 provided on the outer surface of the inner cylinder member 120 with bolts or the like. . In this way, the exhaust gas guided from the bypass duct 31 to the exhaust duct 83 is guided to the region 120 a inside the inner cylinder member 120. That is, the inner cylinder portion 95 of the bypass duct 31 and the inner cylinder member 120 are connected, and the exhaust gas that has passed through the inner cylinder portion 95 of the bypass duct 31 is guided into the inner cylinder member 120 of the exhaust duct 83. It is designed to be discharged downstream.

  A relatively high temperature exhaust gas guided from the bypass duct 31 passes through the inner region 120a of the inner cylinder member 120, while the outer region 120b of the inner cylinder member 120 has an exhaust port below the heat storage chambers 11 and 12. The relatively low temperature exhaust gas led from 22 and 23 to the exhaust duct 83 passes. The comparatively high temperature exhaust gas guided to the inner region 120a of the inner cylinder member 120 is mixed and cooled with the relatively low temperature exhaust gas flowing into the inner region 120a, and further passed through the outer side of the inner cylinder member 120. Cooled by low temperature exhaust gas.

  The inner cylinder member 120 may be a member whose upstream end is closed and its downstream end is opened. In this case, the exhaust gas in the exhaust duct 83 passes through the region 120b outside the inner cylinder member 120. On the other hand, the exhaust gas that has passed through the inner cylinder portion 95 of the bypass duct 31 is discharged to the downstream side through the region 120 a inside the inner cylinder member 120.

  When the inner cylinder member 120 is not provided, the wall surface of the exhaust duct 83 is directly exposed to the high-temperature exhaust gas that has passed through the bypass duct 31, so that the wall surface is heated and deformation of the exhaust duct 83 or surface coating is performed. There was a risk of peeling. However, according to the regenerative exhaust gas purification apparatus according to the present embodiment, the inner cylinder member 120 can prevent high-temperature exhaust gas from directly flowing into the exhaust duct 83 and coming into contact with the exhaust duct 83.

  As described above, in the regenerative exhaust gas purification apparatus 1 according to the present embodiment, the inner cylinder member 120 is provided at the connection portion with the bypass duct 31 in the exhaust duct 83 to form a duplex structure. It is possible to prevent the hot exhaust gas from coming into direct contact with the exhaust duct 83, and further, the cooling effect can be exhibited by the relatively low temperature gas flowing outside the inner cylinder member 120. As a result, in the regenerative exhaust gas purification apparatus 1 according to the present embodiment, the exhaust duct 83 can be prevented from being deformed or cracked, and the surface coating can be peeled off.

  Next, a bypass duct 131 according to a second modification will be described with reference to FIG. In the regenerative exhaust gas purification apparatus 1 according to the present embodiment, a bypass duct 131 shown in FIG. 6 may be provided instead of the bypass duct 31 shown in FIG. Even when this bypass duct 131 is provided, the above-described inner cylinder member 120 may be provided in the exhaust duct 83.

  The bypass duct 131 is a curved path that is curved with respect to a straight path that connects the first flow rate adjusting valve 34 to the exhaust duct 83 at the shortest distance. Since the bypass duct 131 is a curved path, the passage time of the exhaust gas is longer than that of the straight path.

  Specifically, the bypass duct 131 is set to such a length that the time until the exhaust gas that has passed through the first flow rate adjustment valve 34 joins the exhaust duct 83 is 0.1 seconds to 1.5 seconds. ing. Here, this time is a value calculated from the average flow rate in the bypass duct 131 determined from the amount of surplus heat generated in the combustion chamber 10 and the average flow velocity determined by the duct diameter (cross-sectional area).

  The regenerative exhaust gas treatment apparatus 1 using the bypass duct 131 according to the second modification shown in FIG. 6 is effective when treating a gas having a strong odor. For example, when ethyl acetate is treated, acetic acid having a stronger odor may be generated as an intermediate when the residence time is insufficient.

  The bypass duct 131 has a refractory castable 131a on its inner surface, and exhaust gas can be retained in a high temperature state, so that a gas such as acetic acid having a stronger odor is always completely supplied regardless of operating conditions. It can be led to the exhaust duct 83 in a state of being decomposed (completely combusted).

  Next, an upper and lower divided structure of the heat storage type exhaust gas purification apparatus 1 will be described with reference to FIGS. The heat storage type exhaust gas purification device 1 adopts a vertically divided structure, so that the overall size of the device becomes compact, and additional components (a filter box 87, a control panel roof 86, a ladder 85, air for combustion are described later). With the pipe 89, the exhaust duct 83, and the bypass duct 31) removed, each of the upper and lower divided units can be mounted on, for example, a transport vehicle (width 3000 mm, height 3180 mm, length 5500 mm). This is advantageous. That is, the regenerative exhaust gas purification apparatus 1 can be carried into the site in a state where the upper unit and the lower unit are separated.

  By making the upper and lower split structure, assembly operation after on-site delivery can be minimized, that is, only for installation (fixation) of the lower unit, connection of the upper unit to this lower unit, and attachment of attached parts it can. Conventionally, the on-site assembly has been complicated, but by using this two-part structure, the assembly process can be completed only by attaching the upper and lower units and accessories. As a result, it is possible to shorten the construction period on site, and the entire construction period can be shortened. In addition, the above-mentioned size is an example in the case of considering a frequently used transport vehicle.

  More specifically, as shown in FIGS. 7 and 9, the regenerative exhaust gas purification apparatus 1 includes a first casing 41 and a second casing 42 that can be coupled and separated from each other. The combustion chamber 10 is provided in the first housing 41. The plurality of heat storage chambers 11, 12 are provided on the first housing 41 at one end (upper end) side and on the second housing 42 at the other end (lower end) side. That is, the upper part of the flow port forming member 24 (see FIG. 13) described later of the second housing 42 functions as the heat storage chambers 11 and 12. When the first casing 41 and the second casing 42 are coupled, the respective heat storage chambers 11 and 12 are formed. The heat storage bodies 26 and 27 are provided on the first housing 41 side of the heat storage chambers 11 and 12. The supply on / off valves 14 and 15 and the discharge on / off valves 16 and 17 are provided in the second casing 42.

  Next, the division positions of the upper and lower units and the division positions of the units and accessories will be described. In FIG. 7, PPA indicates a division position A, and details of the division position A are shown in FIG. The division position A is a position where the upper unit 70 and the lower unit 50 are divided vertically. The upper unit 70 and the lower unit 50 divided at the division position A are in a state as shown in FIG. In FIG. 7, PPB indicates a division position B, and details of the division position B are shown in FIG. 8B. The division position B is a position at which the lower unit 50 and the filter box 87 are divided. More specifically, the division position B is a position at which the nozzle portion 50a of the lower unit 50 and the air supply pipe 87a from the filter box 87 are divided. The filter box 87, which is an accessory part divided from the lower unit 50 at the division position B, is in a state as shown in FIG.

  In FIG. 7, PPC indicates a dividing position C, and details of the dividing position C are shown in FIG. The division position C is a position where the upper unit 70 and the bypass duct 31 are divided. More specifically, the division position C is a position where the nozzle portion 70a of the upper unit 70 and the on-off valve 34 provided in the bypass duct 31 are divided. . In FIG. 7, PPD indicates a division position D, and details of the division position D are shown in FIG. 8 (D). The division position D is a position where the lower unit 50 and the exhaust duct 83 are divided. More specifically, the division position D is a position where the nozzle portion 50b of the lower unit 50 and the joint portion 83a of the exhaust duct 83 are divided. The exhaust duct 83 (with the bypass duct 31) divided from the upper unit 70 and the lower unit 50 at the division positions C and D is in the state shown in FIG.

  In FIG. 7, PPE indicates a division position E, and details of the division position E are shown in FIG. The division position E is a position where the lower unit 50 and the mounting portion 86a of the control panel roof 86 are divided. The control panel roof 86, which is an accessory part divided from the lower unit 50 at the division position E, is in a state as shown in FIG. In FIG. 7, PPF indicates a division position F, and the division position F is shown in detail in FIG. The division position F is a position where the upper unit 70 and the attachment portion 85a of the ladder 85 are divided. The ladder 85, which is an accessory part divided from the upper unit 70 at the division position F, is in a state as shown in FIG.

  In FIG. 7, PPG indicates the division position G. The division position G is a position where the combustion blower 60 of the lower unit 50 and the air pipe 89 are divided. In FIG. 7, PPH indicates the division position H. The division position H is a position where the burner unit 76 of the upper unit 70 and the air pipe 89 are divided. The air piping 89 divided from the combustion blower 60 and the burner unit 76 at the division positions G and H is in a state as shown in FIG. The above-described division positions A to H are respectively coupling positions at the time of field installation. Further, fastening members such as bolts and nuts are used for fastening at each coupling position (divided position).

  Next, the lower unit 50 will be described with reference to FIG. The lower unit 50 includes a second casing 42 and a base member 51, and the second casing 42 that functions as a hopper portion of the two heat storage chambers 11 and 12 is attached to the base member 51. . The second casing 42 has a shape (the shape in the horizontal plane is substantially the same) as the first casing 41 that functions as the combustion chamber 10 and the heat storage chambers 11 and 12. The second casing 42 is integrally provided with a columnar member 42 a for mounting on the base member 51. A soundproof panel 53 and a door 68 constituting the side surface of the lower unit 50 are attached between the columnar members 42 a of the second housing 42. The inside of the lower unit 50 is accessible through the door 68.

  As shown in FIGS. 1 and 11D, the above-described on-off valves 14, 15, 16, and 17 functioning as switching dampers are provided inside the second housing 42. These on-off valves 14, 15, 16, and 17 are poppet type (also referred to as “poppet dampers”) in which the valve bodies 14 a, 15 a, 16 a, and 17 a move up and down.

  A thermocouple 66 that functions as an inlet thermometer and a thermocouple 67 that functions as an outlet thermometer are attached to each of an inlet portion and an outlet portion of the second casing 42 that functions as a hopper portion. A blower 56 is mounted on the base member 51 in the interior partitioned by the soundproof panel 53. As shown in FIG. 1, the blower 56 and the second casing 42 are communicated with each other through a duct 56a.

  An air tank 43 and a differential pressure transmitter 59 are attached to the lower part of the second casing 42 that functions as a hopper. The air tank 43 is also called a header pipe, and stores compressed air for driving the on-off valves 14, 15, 16 and 17, which are switching dampers, as described above. The air tank 43 is connected to an air cylinder that is a drive unit of the on-off valves 14, 15, 16, and 17 by an air tube (not shown).

  The differential pressure transmitter 59 is for measuring the main body differential pressure of the regenerative exhaust gas purification device 1. In the differential pressure transmitter 59, each of the inlet portion and the outlet portion of the hopper portion 52 is connected by a pipe. The combustion blower 60 is installed on the base member 51 inside the soundproof panel 53, and its discharge port is communicated with the upper unit 70 by an air pipe 89.

  An air supply panel 54 is attached to the side surface of the second housing 42. The air supply muffler 61 and the air supply fan 62 ventilate the interior by sending air into the space inside the soundproof panel 53. The ventilated air is exhausted by the exhaust muffler 63. An inspection port is provided on the side surface of the second housing 42, and an inspection port lid 69 is attached to the inspection port.

  The main control panel 64 is installed on the base member 51 and is connected to the equipment in the lower unit 50 by electrical wiring. The upper unit 70 is wired via a relay box 65.

  Next, the upper unit 70 will be described with reference to FIG. The upper unit 70 includes a first casing 41, and the combustion chamber 10 is formed in the first casing 41. A burner 75 and a burner unit 76 are attached to the combustion chamber 10. The fuel and combustion air are supplied to the burner 75 after being adjusted to an appropriate flow rate in the burner unit 76. A plurality of thermocouples 80 are attached to the upper portion of the combustion chamber 10 or the like. The thermocouple 80 is provided for measuring the temperature in the combustion chamber 10. The furnace temperature is controlled by the outputs of the thermocouple 80 and the burner 75.

  A burner control panel 77 for controlling the burner unit 76 is attached to the upper part of the burner unit 76. These are arranged in the burner shed 73. The first casing 41 is provided with a deck 74 for accessing the burner hut 73. The burner control panel 77 is connected to the relay box 65 of the lower unit 50 by electric wiring. A heat insulating material 78 is attached to the inside of the first casing 41 that functions as the combustion chamber 10 and the heat storage chambers 11 and 12 to form a heat insulating structure. Inside the cabinet 71, heat storage bodies 26 and 27 are provided.

  Next, a state in which the upper unit 70 and the lower unit 50 are coupled will be described with reference to FIG. An upper unit 70 is connected to the upper side of the lower unit 50. The exhaust duct 83 is connected to the lower unit 50 and extends upward and then is exhausted in the lateral direction by an elbow. The exhaust duct 83 and the upper unit 70 are connected by a hot bypass damper (bypass duct 31).

  The combustion blower 60 in the lower unit 50 and the burner unit 76 of the upper unit 70 are connected by a combustion air pipe 89. As a result, combustion air is supplied to the burner unit 76.

  The ladder 85 is connected to the upper unit 70 so that an operator can access the upper unit 70. The control panel roof 86 is fixed to the lower unit 50, and is for protecting the operator from rain when operating the main control panel 64 (see FIG. 6).

  A cold air intake damper 88 is attached to the upper portion of the filter box 87. This is for introducing outside air when the regenerative exhaust gas combustion apparatus 1 is started. The filter box 87 is for removing foreign substances and the like in the gas to be processed. The blower 56 in the lower unit 50 is connected.

  Next, as shown in FIG. 1, in the above-described heat storage type exhaust gas purification apparatus 1, a partition wall 13 is formed between the two heat storage chambers 11 and 12, and the heat storage bodies 26 and 27 are heated by the partition wall 13. Separated. Further, the burner 75 is provided on the side surface of the first housing 41 in order to suppress the dimension of the upper unit 70 in the height direction.

  The second housing 42 has the same dimensions in the horizontal plane as the first housing 41 and is formed in a rectangular parallelepiped shape whose height direction is reduced. A partition wall 18 is provided inside the second housing 42, and the partition wall 18 is divided into a space 18 a that functions as the supply ports 20 and 21 and a space 18 b that functions as the discharge ports 22 and 23. The partition wall 18 is formed in a direction substantially orthogonal to the partition wall 13 formed between the heat storage chambers 11 and 12.

  Next, the on-off valve will be described with reference to FIG. The supply on / off valves 14 and 15 and the discharge on / off valves 16 and 17 are so-called poppet dampers (poppet valves). Specifically, the on-off valves 14 to 17 have a circulation port forming member 24 provided with circulation ports 24 a, 24 b, 24 c, and 24 d, and in this exhaust gas purification apparatus 1, four circulation port forming members 24 are provided. It is formed as a common member common to the two on-off valves. Further, a member that forms a flow path when the gas flows into and out of the heat storage chambers 11 and 12 is also a common member (second housing 42). As a result, the structure becomes simple and compactness can be achieved.

  The on-off valves 14 to 17 have valve bodies 14a, 15a, 16a, and 17a and cylinders 14b, 15b, 16b, and 17b, respectively. The valve bodies 14a to 17a are movable in the direction of approaching and separating from the flow port forming member 24. That is, the valve bodies 14a to 17a are attached to the tips of the rods 14c, 15c, 16c, and 17c of the cylinders 14b to 17b, and are moved according to the expansion and contraction of the rods 14c to 17c. The valve bodies 14a to 17a are moved in the direction approaching the flow port forming member 24 and contacted to close the flow ports 24a to 24d. At the same time, the valve bodies 14a to 17a are separated from the flow port forming member 24 to open the flow ports 24a to 24d. The cylinders 14b to 17b drive the valve bodies 14a to 17a in the abutting and separating directions (vertical direction).

  Furthermore, the valve bodies 14a-17a are arrange | positioned with respect to the circulation port formation member 24 on the opposite side (lower side) with respect to the heat storage bodies 26 and 27, as shown in FIG.13 (B). When the valve bodies 14a to 17a are moved in the direction approaching the heat storage bodies 26 and 27 (upper side), the circulation ports 24a to 24d are closed. Further, the valve bodies 14a to 17a are moved in a direction (lower side) away from the heat storage bodies 26 and 27, whereby the circulation ports 24a to 24d are opened. With this feature, the height dimension of the exhaust gas combustion apparatus 1 can be reduced.

  In order to compare and explain this, a structure conventionally used is shown in FIG. Since this conventional valve body 214 is disposed on the upper side with respect to the flow port forming member 224, a space is required between the flow port forming member 224 and the heat storage body so that the valve body 214 can move. It becomes. The seal member 214d was provided on the flow port forming member 224 side. Further, the rod 214c of the cylinder 214b becomes longer and the intermediate bearing 225 is required. The intermediate bearing 225 is provided with a grease supply unit 225a. On the other hand, the on-off valves 14 to 17 shown in FIG. 8B can simplify the structure without the need for an intermediate bearing and can achieve downsizing. Further, the seal members can be easily replaced by providing the seal members 14d to 17d on the valve bodies 14a to 17a side.

  Further, as shown in FIG. 13B, seal members 14d to 17d are formed on the valve bodies 14a to 17a at portions (upper portions) that are in contact with the flow port forming member 24. The seal members 14d to 17d seal between the valve bodies 14a to 17a and the flow port forming member 24 when the valve bodies 14a to 17a close the flow ports 24a to 24d. A grease supply unit 25 is provided on the rods 14c to 17c.

  In the above-described supply on / off valves 14 and 15 and the discharge on / off valves 16 and 17, the respective flow port forming members 24 are common. For this reason, the second casing 42 includes the second casing 42. A partition wall 18 is provided that divides a portion below the flow port forming member 24 into two spaces 18a and 18b. In one space 18 a divided by the partition wall 18, a supply port 20 provided in one heat storage chamber 11 and a supply port 21 provided in the other heat storage chamber 12 are formed. In the other space 18b, a discharge port 22 provided in one heat storage chamber 11 and a discharge port 23 provided in the other heat storage chamber 12 are formed. The flow port forming member 24 is a common member, and the supply ports 20 and 21 and the discharge ports 22 and 23 are appropriately disposed in the two spaces 18a and 18b separated by the partition wall 18, thereby simplifying and reducing the size. In this state, the supply side and the exhaust side of the heat storage chambers 11 and 12 can be switched. In other words, the mechanism for switching the flow direction of the gas flowing through the combustion chamber 10 and the heat storage chambers 11 and 12 can be reduced in size, and the entire apparatus can be reduced in size.

  As shown in FIG. 1, the second casing 42 is provided with a partition wall 19 that divides a portion above the flow port forming member 24 into two spaces 19 a and 19 b. The partition wall 19 is provided so as to be substantially parallel to and substantially on the same plane as the partition wall 13 provided in the combustion chamber 10, and forms the heat storage chambers 11 and 12 together with the partition wall 13. One space 19 a divided by the partition wall 19 functions as a part of the heat storage chamber 11. The other space 19 b functions as a part of the heat storage chamber 12. In addition, the partition wall 19 provided on the upper side of the flow port forming member 24 and the partition wall 18 provided on the lower side are arranged so as to be substantially orthogonal to each other in order to exhibit their functions.

  By switching the above-described on-off valves 14 to 17 every elapse of a predetermined time, the supply side (side to which the gas to be processed is supplied) and the exhaust side (side from which the processed gas is discharged) of the heat storage chambers 11 and 12 The operation is performed by switching. Note that the switching timing of the on-off valve may be based on the inlet / outlet temperature (the temperature of the supplied and exhausted gas measured by a temperature sensor). The bypass duct 31 as a heat exhaust damper can exhaust exhaust gas for equipment protection when surplus heat is generated. Furthermore, the amount of heat load in the preheating process and heat recovery (heat storage) process of the heat storage body is reduced.

  Exhaust gas is supplied to each of the supply ports 20 and 21 via the space 18a inside the second casing 42 instead of a normal type exhaust gas supply pipe. A blower 56 is connected to the gas supply space 18a, and exhaust gas, which is a gas to be processed, discharged from various facilities through a filter box 87 is supplied. The filter box 87 functions to remove dust in the exhaust gas and also has a function of reducing pressure fluctuations. The processed gas is discharged to the discharge ports 22 and 23 through the space 18b in the second housing 42. An exhaust duct 83 is connected to the gas discharge space 18b, and the processed gas is discharged to the outside through the exhaust duct 83. A bypass duct 31 is connected in the middle of the exhaust duct 83.

  Further, in the heat storage type exhaust gas purification apparatus 1, the second casing 42 constitutes the lower unit 50 together with the base member 51 for fixing and mounting the second casing at the installation position. A blower 56 for guiding the gas to be processed to the supply ports 20 and 21 is attached, and a soundproof panel 53 is attached between the base member 51 and the second housing 42.

  Further, in the heat storage type exhaust gas purification apparatus 1, since the first casing 41 includes the upper unit 70 and the second casing 42 includes the lower unit 50, each of the upper and lower units 70 and 50, The width is 2500 to 3000 mm, the height is 2500 to 3180 mm, and the length is 4000 to 5500 mm. These width, height, and length dimensions take into account transport restrictions in Japan, but these dimensions may be changed in countries with different transport restrictions. In other words, the width, height, and length dimensions of the exhaust gas purification device 1 are dimensions in consideration of transportation restrictions. As described above, each component of the upper unit 70 and the lower unit 50 is reduced to the utmost limit and the size is reduced, so that the upper unit 70 and the lower unit 50 are suppressed to the above-described size range, thereby reducing the upper unit 70 and the lower unit 50. It is possible to realize on-site delivery with the unit 50 divided, greatly reduce on-site assembly and installation, reduce installation costs, and minimize the stop of the production line at the destination. realizable.

  Further, in the heat storage type exhaust gas purification apparatus 1, a main control panel 64 and a burner control panel 77 as shown in FIG. 11 are provided, and the main control panel 64 and the burner control panel 77 have a plurality of signals for connecting each other. Connection terminals 100a and 100b for connecting a communication cable 100 in which lines are combined are provided. Thereby, it can replace only with the local wiring operation | work to each apparatus by the side of the upper unit 70 conventionally required, and can only set installation of the communication cable 100 to the burner control panel 77. FIG. As a result, it is possible to greatly reduce the local wiring work.

  Next, the exhaust gas purification method by the regenerative combustion exhaust gas purification apparatus 1 according to this embodiment described above will be described. First, as shown in FIG. 1, it is assumed that the heat storage chamber 12 is on the supply side and the heat storage chamber 11 is on the discharge side. The exhaust gas to be processed passes through the space 18 a of the second housing 42, passes through the supply port 20, and reaches the heat storage chamber 11.

  Next, the exhaust gas is heated by exchanging heat with the heat storage body 27 when passing through the heat storage body 27 on the heat storage chamber 12 side of the first housing 41. On the other hand, the heat storage body 27 is radiated and cooled. The exhaust gas heated by the heat accumulator 27 and reaching the combustion chamber 10 undergoes combustion decomposition of components contained in the combustion chamber 10.

  Next, the treated gas after combustion passes through the heat storage body 26 of the heat storage chamber 11. At this time, the treated gas is cooled by exchanging heat with the heat storage body 26. On the other hand, the heat storage body 26 is stored. The cooled treated gas passes through the discharge port 22, passes through the space 18 a of the second housing 42, and reaches the exhaust duct 83.

  If this operation is continued, the heat storage body 27 of one heat storage chamber 12 is radiated and cooled, and the heat storage body 26 of the other heat storage chamber 11 is stored and heated. For this reason, after a certain period of time, the on-off valve 15 of the supply port 21 of the heat storage chamber 12 is closed, and the on-off valve 17 of the discharge port 23 is opened. At the same time, the opening / closing valve 14 of the supply port 20 of the heat storage chamber 11 is opened, and the opening / closing valve 16 of the discharge port 22 is closed. By this operation, the gas flow direction is reversed, and the heat storage chamber 12 is switched to the discharge side and the heat storage chamber 11 is switched to the supply side.

  As a result, the exhaust gas to be processed next can be heated by heat exchange with the heat storage body 26 that has sufficiently stored heat. The heated exhaust gas is processed in the combustion chamber 10 and cooled and exhausted by heat exchange with the heat storage body 27. After a certain period of time, the opening / closing valve 15 of the supply port 21 of the heat storage chamber 12 is opened, and the opening / closing valve 17 of the discharge port 23 is closed. At the same time, the opening / closing valve 14 of the supply port 20 of the heat storage chamber 11 is closed, and the opening / closing valve 16 of the discharge port 22 is opened. This operation reverses the gas flow direction, switching the heat storage chamber 12 to the supply side and the heat storage chamber 11 to the discharge side.

  By repeating the above operation at regular intervals, the operation can be continued to perform an efficient combustion process using exhaust heat.

  As for the temperature in the combustion chamber 10, the output of the burner 75 is adjusted so that the value becomes a constant temperature while measuring the temperature of the thermocouple 80. When the processing component contained in the exhaust gas is large, the temperature in the combustion chamber 10 rises due to combustion of the component. Therefore, when the measured value of the thermocouple 80 reaches a certain temperature, the operation is performed while the output of the burner 75 is turned off. Furthermore, when the measured value of the thermocouple 80 reaches a certain temperature, the excess heat is discharged via the bypass duct 31 that functions as a hot bypass damper. This adjustment control is performed by adjusting the first flow rate adjustment valve 34 while measuring the temperature of the thermocouple 80 installed in the combustion chamber 10.

  As described above, the heat storage type exhaust gas purification apparatus 1 according to the present embodiment includes the combustion chamber 10, the pair of heat storage chambers 11 and 12, the supply ports 20 and 21, the discharge ports 22 and 23, and the heat storage bodies 26 and 27. The exhaust duct 83 and the bypass duct 31 are provided, and a molded body 91 of a heat insulating material is provided in a region where the first flow rate adjusting valve 34 is provided in the bypass duct 31. Thereby, generation | occurrence | production of the malfunction by the heat | fever of the waste gas which distribute | circulates the inside of the bypass duct 31 can be reduced.

  Further, the heat storage type exhaust gas purification apparatus 1 includes first and second casings 41 and 42 that can be combined and separated, the combustion chamber 10 is provided in the first casing 41, and the heat storage bodies 26 and 27 are provided. On / off valves 14 and 15 of the supply ports 20 and 21 and on-off valves 16 and 17 of the discharge ports 22 and 23 are provided on the second housing 42.

  As described above, the heat storage type exhaust gas purifying apparatus 1 can simplify installation and assembly on site and minimize the construction period by downsizing the apparatus and unitizing the apparatus. Moreover, it is possible to unitize the control panel according to the unitized part, thereby greatly reducing local wiring work.

  Here, the heat storage type exhaust gas purification device 1 of the upper and lower two division system has been described. However, the present invention is not limited to this, and for example, it is brought into the field in the state of various parts and assembled on site. A heat storage type exhaust gas purification device may be used.

  Next, a heat storage type exhaust gas purifying apparatus according to another embodiment of the present invention will be described with reference to FIG. In addition to the configuration of the heat storage type exhaust gas purification device 1 of FIG. 1 described above, the heat storage type exhaust gas purification device 141 according to this embodiment is further provided for recovering heat generated in the combustion chamber 10 provided outside the combustion chamber 10. The heat recovery device (heat recovery system) 140, the heat recovery bypass duct 142 provided so as to communicate the combustion chamber 10 and the heat recovery device 140, and the second heat recovery bypass duct 142 provided in the heat recovery bypass duct 142 are provided. A flow rate adjusting valve 143. The outlet side of the heat recovery device 140 is connected to the exhaust duct 83.

  The heat recovery bypass duct 142 is a duct for using the heat generated in the combustion chamber 10 in the heat recovery device 140 provided outside. Here, as in the case of the duct 31 around the first flow rate adjustment valve 34 described above, a molded body of heat insulating material is provided on the inner surface of the bypass duct 142 for heat recovery around the second flow rate adjustment valve 143. May be.

  The heat recovery system 140 has a heat exchanger or the like, and can recover the heat from the heat storage type exhaust gas purification device 141 and use it for other purposes. The heat recovery bypass duct 142 guides the exhaust gas after combustion in the combustion chamber 10 to the heat recovery device 140. In the regenerative exhaust gas purification apparatus 141 according to the present embodiment, the heat recovery bypass duct 142 is provided, and therefore the third flow rate adjustment valve 145 is provided upstream of the exhaust duct 83.

  The regenerative exhaust gas purification device 141 further controls a pressure detector 144 that detects the pressure in the combustion chamber 10 and a third flow rate adjustment valve 145 provided in the exhaust duct 83 based on the detection result of the pressure detector 144. And a control unit 146.

  What is necessary is just to control this 3rd flow regulating valve 145 so that the static pressure range in the combustion chamber 10 detected by the pressure detector 144 may be set to 30-250 mmAq, for example. Further, the opening degree of the third flow rate adjustment valve 145 is moderately 100% to 15%.

  The regenerative exhaust gas purification device 141 can adjust the static pressure in the combustion chamber 10 by controlling the third flow rate adjustment valve 145. Thereby, surplus heat can be stably supplied to the heat recovery apparatus 140. That is, the static pressure in the combustion chamber 10 may fluctuate depending on conditions such as the concentration of exhaust gas and the temperature at the time of inflow. The flow rate of the gas flowing into the heat recovery device 140 via the heat recovery bypass duct 142 is proportional to the static pressure difference between the combustion chamber 10 and the heat recovery device 140. From this, it is better that the static pressure in the combustion chamber 10 is stable. In the heat storage type exhaust gas purification device 141, the third flow rate adjusting valve 145, the pressure detector 144, and the control unit 146 can stably supply surplus heat and perform stable heat recovery.

  Here, in the heat storage type exhaust gas purifying apparatus 141 according to the present embodiment, both the bypass duct 31 and the heat recovery bypass duct 142 are provided as the surplus heat exhaust duct, but the present invention is not limited to this. That is, the heat recovery device 140 may be provided between the connection portions of the bypass duct 34 between the first flow rate adjustment valve 34 and the exhaust duct 83. Even in this case, the same effect as the effect of the above-described heat storage type exhaust gas purification device 141 can be obtained.

  Next, a modified example of the on-off valve serving as the air supply / exhaust valve of the heat storage type exhaust gas purifying apparatus will be described with reference to FIG. In the heat storage type exhaust gas purification apparatus 1, 141 described above, the on / off valves serving as the air supply / exhaust valves provided in the heat storage chambers 11 and 12 are provided with the on / off valves 14 to 17 described with reference to FIG. Can be achieved.

  However, in the regenerative exhaust gas purification apparatus 1, 141 according to the present embodiment, the on-off valve 164 shown in FIG. 15 may be used. The on-off valve 164 is a poppet on-off valve as shown in FIG.

  The on-off valve 164 includes a valve body 164a, a cylinder 164b, a rod 164c, and a seal member 164d. The on-off valve 164 is opened to gradually incline in the first inclination direction S1 with respect to the posture of the valve body 164a in the closed state. At the same time, when further operating in the opening direction, the operation is gradually performed in parallel with the original posture (the posture of the valve body 164a in the closed state). Further, when operating in the opening direction, the opening operation is performed so as to gradually incline in the second inclination direction S2 opposite to the first inclination direction S1.

  The first tilt direction S1 and the second tilt direction S2 are axisymmetric with respect to the center of the rod 164c in the same plane including the rod 164c. The valve body 164a is connected to the rod 164c through a joint 164f. The joint 164f enables the valve body 164a to be tilted in one direction and in opposite directions (first and second tilt directions S1 and S2) in the same plane.

  The valve body 164 is provided with a weight 168 on the upper surface of the valve body 164a on the outer peripheral side so that the valve body 164a is inclined in the first inclination direction S1. On the upper surface of the valve body 164a, there is provided a regulating member 169 that prevents the abutting portion 164e of the valve body 164a from rising by contacting the valve body 164a at a position symmetrical to the position where the weight 168 is provided. . The weight 168 is about 5 to 50 kg, for example. The inclination range of the valve body 164 controlled by the restriction member 169 is about 0 to 60 degrees with respect to the horizontal direction (the posture of the valve body 164a in the closed state).

  By abutting against the regulating member 169, the valve body 164a is operated to be parallel to the original posture and is opened to gradually incline in the second inclination direction S2. Here, the on-off valve 165 has basically the same structure as the on-off valve 164. However, since the position of the weight 168 and the position of the regulating member 169 are different, the on-off valve 165 has an inclination of the valve body 165a. The direction (first and second inclination directions) is opposite to the directions S1 and S2 of the on-off valve 164. One of the on-off valves 164 and 165 is for air supply, and the other is for exhaust.

  When these on-off valves 164 and 165 are used, there is an advantage that the static pressure fluctuation at the time of opening and closing can be moderated.

DESCRIPTION OF SYMBOLS 1,141 Thermal storage type exhaust gas purification apparatus 10 Combustion chamber 11,12 Thermal storage chamber 14,15,16,17 On-off valve 20,21 Supply port 22,23 Exhaust port 26,27 Thermal storage body 31,131 Bypass duct 34 First flow rate adjustment Valve 41 First housing 42 Second housing 50 Lower unit 70 Upper unit 83 Exhaust duct 91 Ceramic fiber molded body 92 Rotating shaft 93 Valve body 94 Abutting member 95 Inner cylinder part 96 Outer cylinder part 97 Heat insulating material 99 Actuator 104 Support member 120 Inner cylinder member 140 Heat recovery device 142 Heat recovery bypass duct 143 Second flow rate adjustment valve 145 Third flow rate adjustment valve 144 Pressure detector 146 Control unit 164 Open / close valve

Claims (10)

A heat storage type exhaust gas purification device that purifies exhaust gas using a heat storage body,
A combustion chamber for burning exhaust gas;
A plurality of heat storage chambers each having one end communicating with the combustion chamber;
A supply on / off valve for supplying a gas to be treated to the heat storage chamber provided at the other end of each of the plurality of heat storage chambers;
A discharge on-off valve provided at the other end of each of the plurality of heat storage chambers for discharging the gas to be treated from the heat storage chamber;
A heat storage body provided in each of the plurality of heat storage chambers;
An exhaust duct connected to the discharge on-off valve;
A bypass duct provided to communicate the exhaust duct and the combustion chamber;
The bypass duct is provided with a first flow rate adjusting valve for adjusting a flow rate of exhaust gas flowing out from the combustion chamber to the exhaust duct,
In the region where the first flow rate adjustment valve is provided on the inner surface of the bypass duct, a molded body of heat insulating material is attached ,
The portion of the exhaust duct to which the bypass duct is connected is provided with an inner cylinder member that divides a region in the exhaust duct into an inner region and an outer region. The regenerative exhaust gas purification apparatus is characterized in that the exhaust gas flows out from the bypass duct into the area of the heat storage.   The regenerative exhaust gas purification device according to claim 1, wherein the molded body of the heat insulating material is a molded body of a ceramic fiber formed in a cylindrical shape.   The first flow rate adjusting valve includes a rotation shaft fixed to the inner surface of the bypass duct so as to be rotatable, a valve body fixed to the rotation shaft, and a molded body of the ceramic fiber on the inner surface of the bypass duct. The regenerative exhaust gas purification apparatus according to claim 2, further comprising: a contact member provided so as to protrude further inwardly and contacting the valve body when the valve body is rotated and closed. The bypass duct is a curved path that is curved from the first flow control valve to the exhaust duct so that a time for exhaust gas to reach the exhaust duct from the first flow control valve is a predetermined time. 1 regenerative exhaust gas purifying apparatus according. The regenerative exhaust gas purification apparatus according to claim 4 , wherein the predetermined time is a time of 0.1 seconds to 1.5 seconds. Furthermore, a heat recovery device provided outside the combustion chamber for recovering heat generated in the combustion chamber;
A heat recovery bypass duct provided so as to communicate the combustion chamber and the heat recovery device;
The regenerative exhaust gas purification apparatus according to claim 5, wherein the heat recovery bypass duct is provided with a second flow rate adjusting valve for adjusting a flow rate of exhaust gas flowing out from the combustion chamber to the heat recovery device. A third flow rate adjusting valve provided upstream of the connection position of the exhaust duct with the bypass duct;
A pressure detector for detecting the pressure in the combustion chamber;
The regenerative exhaust gas purification apparatus according to claim 6 , further comprising: a control unit that controls an opening degree of the third flow rate control valve based on a pressure detected by the pressure detector. At least one of the supply on-off valve and the discharge on-off valve is a poppet on-off valve, and the poppet on-off valve gradually inclines in the first inclination direction with respect to the posture of the closed valve body. When the valve is further opened and moved further in the opening direction, it is gradually moved so as to be parallel to the posture of the valve body in the closed state. The regenerative exhaust gas purification device according to claim 7 , wherein the regenerative exhaust gas purification device is configured to be opened so as to gradually incline in a second inclination direction that is opposite to the first direction. A weight is provided on the valve body of the poppet type opening and closing valve, so that the valve body is inclined in the first inclination direction,
A regulating member is provided for preventing the abutting portion of the valve body from rising by abutting the valve body at a position symmetrical to the position where the weight is provided,
The regenerative exhaust gas purification apparatus according to claim 8 , wherein the valve body is operated so as to be parallel to the posture of the valve body in a closed state by contacting the regulating member. And a first housing and a second housing that are connectable and separable,
The combustion chamber and the heat storage body is provided in the first housing, wherein one of supplying on-off valve and the exhaust on-off valve is the second claim casing is provided in the body 1 to 9 1 The heat storage type exhaust gas purifying apparatus according to item.

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