TWI565915B - Heat accumulation type exhaust gas purification apparatus - Google Patents

Description

Regenerative exhaust gas purification device

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

In the facility (coating, adhesive tape, etc.), the printing industry (gravure printing, lithography), the coating facility, the chemical factory, the electronics/ceramic industry facility, the factory cleaning facility, etc. Exhaust of flammable hazardous components such as volatile organic compounds (VOC). In order to purify the exhaust gas, for example, an exhaust gas purification device described in Patent Document 1 has been used.

A conventional exhaust gas purification device includes, for example, an air supply port/exhaust port to which a pair of air supply/exhaust valves are attached, a plurality of heat storage chambers provided with a heat storage body, and a combustion chamber that communicates with the upper side of the heat storage chambers. The exhaust gas purifying device is operated by switching the air supply/exhaust of the exhaust gas by the air supply/exhaust valve of the regenerator, thereby performing the exhaust gas purification process.

Further, in terms of its function and use, the exhaust gas purification device is expected to have a high temperature of the gas flowing inside the device, and therefore it is desirable to minimize the occurrence of defects due to heat in the components constituting the exhaust gas purification device. .

(previous technical literature)

(Patent Literature)

Patent Document 1: Japanese Laid-Open Patent Publication No. 2004-77017

An object of the present invention is to provide a regenerative exhaust gas purification apparatus capable of reducing occurrence of defects caused by heat of a gas flowing inside the apparatus.

In order to achieve the above object, a regenerative exhaust gas purification apparatus according to the present invention is characterized in that a regenerator is used to purify exhaust gas, and is characterized in that: a combustion chamber that combusts exhaust gas; and one end of each of them is connected to the combustion chamber. a regenerator; an opening and closing valve provided at each of the plurality of regenerators for supplying a supply of a treated gas to the regenerator; at the other end of each of the plurality of regenerators, and for a regenerative chamber discharges an opening/closing valve for discharging a process gas; a regenerator provided in each of the plurality of regenerators; an exhaust pipe connected to the discharge opening and closing valve; and a system for connecting the exhaust pipe to the combustion chamber a bypass pipe; the bypass pipe is provided with a first flow rate adjusting valve for adjusting a flow rate of exhaust gas flowing from the combustion chamber to the exhaust pipe, and a region where the first flow rate adjusting valve is provided on the inner side surface of the bypass pipe A molded body to which a heat insulating material is attached.

In the regenerative exhaust gas purification apparatus of the present invention configured in this manner, a bypass pipe for connecting the exhaust pipe and the combustion chamber is provided, and is adjusted by the first flow rate adjusting valve provided in the bypass pipe. Flowing out of the combustion chamber to the exhaust pipe The flow of exhaust gas, therefore, when excess heat is generated in the combustion chamber, high temperature exhaust gas from the combustion chamber can be discharged to the exhaust conduit to protect the equipment. Further, according to the present invention, since the molded body in which the heat insulating material is attached to the region where the first flow rate adjusting valve is provided on the inner side surface of the bypass pipe, the heat of the exhaust gas flowing through the inside of the bypass pipe can be reduced. The occurrence of bad conditions (thermal deformation, cracking, peeling of surface coating, corrosion of steel plates, etc.) to prolong the service life of the bypass pipe.

In the present invention, it is preferable that the molded body of the heat insulating material is a molded body of a ceramic fiber formed into 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 the ceramic fiber formed into a cylindrical shape, the heat of the exhaust gas flowing through the inside of the bypass pipe can be more effectively reduced. The occurrence of bad conditions (thermal deformation, cracking, peeling of surface coating, corrosion of steel plates, etc.) to prolong the service life of the bypass pipe.

In the invention, it is preferable that the first flow rate adjusting valve has a rotating shaft rotatably fixed to an inner side surface of the bypass pipe, a valve body fixed to the rotating shaft, and an inner side of the molded body of the ceramic fiber The protruding manner is provided on the inner side surface of the bypass pipe, and abuts against the abutting member of the valve body when the valve body is rotated and closed.

In the present invention, the abutting member that abuts against the valve body when the valve body is rotated and closed is provided on the inner side surface of the bypass pipe so as to protrude further inward than the molded body of the ceramic fiber. Therefore, the joint portion of the abutting member and the inner side surface of the bypass pipe can be insulated by the molded body of the ceramic fiber, and is not directly heated by the high-temperature exhaust gas.

In the present invention, it is preferable that a portion of the exhaust pipe to which the bypass pipe is connected is An inner tubular member that divides an area in the exhaust pipe into an inner region and an outer region thereof is provided, and exhaust gas flows out of the bypass pipe in an inner region of the inner tubular member of the exhaust pipe.

In the present invention configured in this manner, since the portion of the exhaust pipe to which the bypass pipe is connected is provided with the inner tubular member that divides the region inside the exhaust pipe into the inner region and the outer region thereof, the exhaust gas is exhausted. The outer region of the tube will have a lower temperature exhaust gas, and in the inner region of the exhaust pipe, there will be a higher temperature exhaust gas flowing out from the bypass pipe, so that the wall surface of the exhaust pipe is not directly exposed to the side. The higher temperature exhaust gas flowing out of the pipe. As a result, according to the present invention, deformation of the exhaust pipe or peeling of the surface coating can be prevented.

In the present invention, it is preferable that the bypass pipe is configured such that the time from when the exhaust gas reaches the exhaust pipe from the first flow rate adjustment valve is a predetermined time, and the first flow rate adjustment valve is bent to the curved path of the exhaust pipe.

In the present invention configured as described above, since the curved path from the first flow rate adjustment valve to the exhaust pipe is formed, the time from when the exhaust gas reaches the exhaust pipe from the first flow rate adjustment valve becomes a predetermined time, so even if it is processed When a gas having a strong odor such as vinyl acetate is not affected by the operating conditions, it can be constantly guided to the exhaust pipe in a state of complete decomposition (complete combustion).

In the present invention, it is preferred that the predetermined time is from 0.1 second to 1.5 seconds.

Preferably, the present invention further comprises: a heat recovery device disposed outside the combustion chamber for recovering heat generated in the combustion chamber; and a heat recovery side disposed in a manner of connecting the combustion chamber and the heat recovery device a bypass pipe for heat recovery is provided for adjusting the flow from the combustion chamber to the heat recovery device The second flow rate adjustment valve for the flow rate of the exhaust gas.

In the present invention configured as described above, since the heat recovery means for recovering the heat generated in the combustion chamber is provided, the flow rate can be adjusted by the second flow rate adjusting valve, and the required amount of heat can be recovered from the combustion chamber as Use of other purposes.

Preferably, the present invention further includes: a third flow rate adjusting valve provided on an upstream side of a connection position of the exhaust pipe and the bypass pipe; a pressure detector for detecting a pressure in the combustion chamber; and utilizing the pressure The control unit that controls the opening of the third flow rate adjusting valve by the pressure detected by the detector.

In the present invention configured as above, the static pressure in the combustion chamber can be adjusted by controlling the opening degree of the third flow rate adjusting valve, so that excess heat can be stably supplied to the heat recovery device.

In the present invention, at least one of the supply opening and closing valve and the discharge opening and closing valve is preferably a lift type on-off valve that is opened gradually toward the first oblique direction with respect to the posture of the valve body in the closed state. When it is operated in the opening direction, it gradually moves in parallel with the posture of the valve body in the closed state, and when it is moved in the opening direction, it is gradually opened in the second oblique direction opposite to the first oblique direction. action.

According to the present invention, at least one of the supply opening and closing valve and the discharge opening and closing valve is a lift type on-off valve that is gradually inclined toward the first oblique direction with respect to the posture of the valve body in the closed state. The opening action is performed, and when it is moved in the opening direction, it gradually moves into a parallel relationship with the posture of the valve body in the closed state, and when it is moved in the opening direction, it is Since the opening operation is gradually inclined in the second oblique direction opposite to the first oblique direction, the static pressure fluctuation at the time of opening and closing can be alleviated.

In the present invention, it is preferable that the valve body of the lift type on-off valve is provided with a hammer body that can tilt the valve body in the first oblique direction, and is provided with a valve body at a position symmetrical with the position at which the hammer body is provided. The restricting member that prevents the abutting portion of the valve body from rising is abutted, and the valve body abuts against the restricting member, thereby operating in parallel with the posture of the valve body in the closed state.

In the present invention, the valve body of the lift type on-off valve is provided with a hammer body that inclines the valve body in the first oblique direction, and is provided with a valve body at a position symmetrical with the position at which the hammer body is provided. Since the restriction member that prevents the abutting portion of the valve body from rising is abutted, the static pressure fluctuation at the time of opening and closing can be surely alleviated by a relatively simple structure.

In the present invention, it is preferable that the first housing and the second housing that can be coupled and separated are provided, and the combustion chamber and the heat storage body are provided in the first housing, and the supply opening and closing valve and the discharge opening and closing valve are provided in the second housing. Inside the frame.

In the present invention, the first casing and the second casing that can be coupled and separated are provided, and the combustion chamber and the heat storage body are provided in the first casing, and the supply opening and closing valve and the discharge opening and closing valve are provided. In the second casing, it is possible to carry it into the site in a state where it is separated into the first casing and the second casing, and it is also possible to reduce the assembly operation after the site loading to the minimum required. As a result, according to the present invention, the construction period at the site can be shortened, and the overall construction period can be shortened.

According to the regenerative exhaust gas purifying device of the present invention, the device can be reduced The occurrence of an inconvenience caused by the heat of the internal circulating gas.

1,141‧‧‧ Regenerative exhaust gas purification device

10,310‧‧‧ combustion chamber

11,12‧‧‧Reheating room

13,19‧‧‧ next door

14,15,16,17‧‧‧Open valve

14a to 17a, 93, 164a, 393‧‧ ‧ body

14b to 17b, 164b, 214b‧ ‧ cylinder

14c to 17c, 164c, 214c‧ ‧ pole

14d to 17d, 164d, 214d‧‧‧ sealing components

18a, 18b, 19a, 19b‧‧‧ space

20, 21‧‧ ‧ supply port

22,23‧‧‧Export

24,224‧‧‧Circulation forming members

24a to 24d‧‧‧ circulation

25‧‧‧Lubricant Supply Department

26,27‧‧‧Regenerator

31,131,331‧‧‧bypass

34‧‧‧1st flow adjustment valve

41‧‧‧1st frame

42‧‧‧2nd frame

50‧‧‧lower unit

50a, 50b‧‧‧Nozzle

51‧‧‧Base member

53‧‧‧Acoustic panels

56‧‧‧Air blower

60‧‧‧Combustion blower

61‧‧‧Oxygen silencer

62‧‧‧Air supply fan

64‧‧‧Main control panel

69‧‧‧Flap

70‧‧‧Upper unit

71‧‧‧Chassis

73‧‧‧Burner Cottage

75‧‧‧burner

76‧‧‧burning unit

77‧‧‧Combustion control panel

78‧‧‧Insulation

80‧‧‧ thermocouple

83‧‧‧Exhaust pipe

83a‧‧‧Interface

85‧‧‧Ladder

85a, 86a‧‧‧Installation Department

86‧‧‧Control panel shelter

87‧‧‧Filter box

87a‧‧‧Air supply piping

89‧‧‧Air piping

91‧‧‧Forms of ceramic fibers

91a‧‧‧ upper part

91b‧‧‧lower part

92,392‧‧‧Rotary axis

94,394‧‧‧Abutment members

95,395‧‧‧Inner tube

96,396‧‧‧Outer tube

97,102‧‧‧Insulation

99‧‧‧Actuator

101,401‧‧‧Outer wall

103‧‧‧Ceramic fiberboard

104‧‧‧Support components

110‧‧‧Installation components

120‧‧‧Inner tubular components

120a‧‧‧ inside area

120b‧‧‧Outer area

121‧‧‧Installation board

131a‧‧‧Fused cast refractory

140‧‧‧heat recovery unit

142‧‧‧Bypass for heat recovery

143‧‧‧2nd flow adjustment valve

145‧‧‧3rd flow adjustment valve

144‧‧‧ Pressure detector

146‧‧‧Control Department

164‧‧‧Open valve

168‧‧‧ Hammer

169‧‧‧Restricted components

225‧‧‧Intermediate bearing

225a‧‧‧Lubricant Supply Department

334‧‧‧Adjustment valve

Fig. 1 is an explanatory view of the inside of a regenerative exhaust gas purification apparatus according to an embodiment of the present invention. Fig. 1(A) is a cross-sectional view corresponding to the front view, and is a cross-sectional view taken along line A-A shown in Fig. 1(D). Fig. 1(B) is a cross-sectional view taken along line B-B of Fig. 1(A). Fig. 1(C) is a cross-sectional view taken along line C-C of Fig. 1(A). Fig. 1(D) is a cross-sectional view taken along line D-D shown in Fig. 1(A).

Fig. 2 is a detailed explanatory view of an exhaust pipe and a bypass pipe of the regenerative exhaust gas purification device according to the embodiment of the present invention. Fig. 2(A) is a cross-sectional view of the regenerative exhaust gas purification apparatus, and Fig. 2(B) is a view showing a state in which the inner tubular member of the exhaust pipe is mounted, and is X1- along the second figure (A). A cross-sectional view of the X1 line.

Fig. 3 is an explanatory view of a molded body of a heat insulating material provided in a bypass pipe of the regenerative exhaust gas purification device according to the embodiment of the present invention. Fig. 3(A) is a cross-sectional view of a bypass pipe provided with a first flow rate adjusting valve. Fig. 3(B) is a plan sectional view showing a bypass pipe in a region where the first flow rate adjusting valve is provided. Fig. 3(C) is an enlarged cross-sectional view showing a portion X2 of Fig. 3(A). Fig. 3(D) is an enlarged cross-sectional view showing a portion X3 of Fig. 3(A).

Fig. 4 is a schematic view of a bypass pipe of a comparative example. Fig. 4(A) is a cross-sectional view of the bypass pipe of the comparative example. Fig. 4(B) is an enlarged cross-sectional view showing a portion X4 of Fig. 4(A). Fig. 4(C) is an enlarged cross-sectional view showing a portion X5 of Fig. 4(A).

Fig. 5 is a cross-sectional view showing a bypass pipe according to a first modification connected from the side surface of the combustion chamber.

Fig. 6 is a bypass pipe having a second modification in which a curved shape is formed A cross-sectional view of a regenerative exhaust gas purification device.

Fig. 7 is a schematic view showing the division position of the regenerative exhaust gas purification apparatus according to the embodiment of the present invention. Figure 7 (A) is a front view. Fig. 7(B) is a left side view. Figure 7 (C) is a right side view.

Fig. 8 is a detailed schematic view showing a division position of the regenerative exhaust gas purification apparatus according to the embodiment of the present invention. Fig. 8(A) is an enlarged view of the PPA portion of Fig. 7. Fig. 8(B) is an enlarged view of the PPB portion of Fig. 7. Fig. 8(C) is an enlarged view of the PPC portion of Fig. 7. Fig. 8(D) is an enlarged view of the PPD portion of Fig. 7. Fig. 8(E) is an enlarged view of the PPE portion of Fig. 7. Fig. 8(F) is an enlarged view of the PPF portion of Fig. 7.

Fig. 9 is a front elevational view of the regenerative exhaust gas purification apparatus divided at the division position shown in Fig. 7.

Fig. 10 is a left side view of the regenerative exhaust gas purification apparatus divided at the division position shown in Fig. 7.

Fig. 11 is an explanatory view of the lower unit. Figure 11 (A) is a front view. Figure 11 (B) is a left side view. Figure 11 (C) is the right side view. Fig. 11(D) is a cross-sectional view taken along line E-E of Fig. 11(A).

Fig. 12 is an explanatory view of the upper unit. Figure 12 (A) is a front view. Fig. 12(B) is a cross-sectional view taken along line F-F of Fig. 12(A). Figure 12 (C) is a right side view. Fig. 12 (D) is a plan view.

Fig. 13 is an explanatory view showing an opening and closing valve of a supply port and a discharge port of the regenerative exhaust gas purification device according to the embodiment of the present invention. Fig. 13(A) is a cross-sectional view showing an opening and closing valve of a conventional structure for comparison with an embodiment of the present invention. Figure 13 (B) is a regenerative exhaust gas purification device provided in an embodiment of the present invention A cross-sectional view of the opening and closing valve.

Fig. 14 is a schematic view showing a regenerative exhaust gas purifying apparatus according to another embodiment of the present invention in which a bypass pipe for heat recovery is provided.

Fig. 15 is a cross-sectional view showing an opening and closing valve that can relax the static pressure fluctuation at the time of opening and closing in a modified example of the opening/closing valve of the air supply/exhaust valve of the regenerative exhaust gas purification device.

Hereinafter, a regenerative exhaust gas purification apparatus according to an embodiment of the present invention will be described with reference to the drawings. First, a regenerative exhaust gas purification apparatus according to an embodiment of the present invention will be described based on Fig. 1 . Reference numeral 1 denotes a regenerative exhaust gas purification device 1 which is suitable for processing components such as organic volatile compounds which are combustible and oxidizable.

As shown in Fig. 1, the regenerative exhaust gas purification apparatus 1 includes a combustion chamber 10 provided with a burner, and a plurality of regenerators 11 and 12 whose one end (upper end) is connected to the combustion chamber 10 and communicates with each other. 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 regenerators 11 and 12.

Further, the arrow symbol in Fig. 1 represents an air flow, and in this example, the regenerator 12 is supplied with exhaust gas (processed gas), and the exhaust gas is exhausted from the regenerator 11 (processed gas). The supply of the exhaust gas to the regenerators 11, 12 and the discharge of the exhaust gases from the regenerators 11, 12 are switchable. In addition, in the first figure, "IN" indicates supply of exhaust gas to the regenerative exhaust gas purification device 1, and "OUT" indicates discharge of the processed gas.

Further, the regenerative exhaust gas purification device 1 is in a plurality of regenerators 11 and 12 The other end (lower end) of each of them is provided with supply opening and closing valves 14, 15, and supply ports 20, 21 for supplying the gas to be processed are formed in these supply opening and closing valves 14, 15. Similarly, the discharge opening and closing valves 16 and 17 are provided at the other ends (lower ends) of the plurality of regenerators 11 and 12, and the discharge opening and closing valves 16 and 17 are formed with discharge ports 22 for discharging the processed gas. twenty three.

Further, the regenerative exhaust gas purification device 1 includes an exhaust pipe 83 connected to the discharge ports 22 and 23, and a bypass pipe 31 for connecting the combustion chamber 10 and the exhaust pipe 83. The exhaust pipe 83 is a passage that discharges the processed gas from the regenerative exhaust gas purification device 1 and then guides it to a predetermined place. The bypass pipe 31 is a bypass passage that communicates the combustion chamber 10 with the discharge sides of the discharge ports 22, 23. Further, the bypass pipe 31 is provided at an upper portion of the combustion chamber 10, and has a first flow rate adjusting valve 34 for adjusting the flow rate of the exhaust gas flowing out of the combustion chamber 10 to the exhaust pipe 83. The first flow rate adjustment valve 34 is a butterfly valve, and the flow rate of the fuel gas can be adjusted according to the amount of rotation of the valve body 93.

A region in which the first flow rate adjusting valve 34 is provided on the inner side surface of the bypass pipe 31 is a molded body 91 provided with a heat insulating material as shown in Figs. 2(A) and 3(A). The molded body 91 of the heat insulating material is preferably a molded body of a cylindrical ceramic fiber.

Here, the first flow rate adjustment valve 34 will be described based on Fig. 3 . The first flow rate adjusting valve 34 has a rotating shaft 92 rotatably fixed to the inner side surface of the bypass pipe 31, a valve body 93 fixed to the rotating shaft 92, an abutting member 94, and an actuator 99. The rotating shaft 92 is provided in a direction orthogonal to the longitudinal direction of the bypass pipe 31. The abutting member 94 is provided on the inner side surface (the inner cylindrical portion 95 to be described later) of the bypass pipe 31 so as to protrude further inward than the molded body 91 of the ceramic fiber. When the valve body 93 rotates and closes, it abuts against the valve body 93.

The first flow rate adjusting valve 34 can rotate the valve body 93 by the rotating shaft 92 to adjust the flow rate of the exhaust gas flowing through the bypass pipe 31, and abut the valve body 93 against the abutting member 94 to prevent the bypass. The flow of exhaust gas within the tube 31.

As shown in Fig. 3, the bypass pipe 31 has an inner tubular portion 95 and an outer tubular portion 96, and a heat insulating material 97 such as a rock wool is filled in between. The heat insulating material 97 is not limited thereto, and may be a ceramic fiber board or the like.

The ceramic fiber molded body 91 is provided inside the inner tubular portion 95. Further, the abutting member 94 is integrated inside the inner tubular portion 95 by welding or the like. The abutting member 94, the inner cylindrical portion 95, the rotating shaft 92, and the valve body 93 all have members of a predetermined strength, and are formed of corrosion-resistant stainless steel or the like. The outer tubular portion 96 is also a member having a predetermined strength and is formed of SS400 (rolled steel for general structure) or the like.

As shown in Fig. 3(C), since the abutting member 94 protrudes more inward than the inner surface of the ceramic fiber formed body 91, the ceramic fiber molded body 91 is formed by at least two of the upper side portion 91a and the lower side portion 91b. The split structure formed by the member.

Here, as shown in Fig. 2, a heat insulating material 102 such as stone wool is provided on the inner surface of the outer wall portion 101 of the combustion chamber 10, and a ceramic fiber board 103 is provided inside. Further, a double-headed plug (not shown) is provided on the outer wall portion 101 toward the inner side, and the heat insulating material 102 and the ceramic fiber board 103 can be fixed by fixing the pressure plate to the double-ended plug.

As shown in Fig. 3(C), the upper portion 91a of the ceramic fiber molded body 91 is supported by the abutting member 94. The lower side portion 91b is locked by The support member 104 of the outer wall portion 101 of the combustion chamber 10 is supported.

Next, the advantages of the molded body (ceramic fiber molded body 91) in which the heat insulating material is provided in the region where the first flow rate adjusting valve 34 is provided in the inner cylindrical portion 95 of the bypass pipe 31 will be described. Fig. 4 is a bypass pipe 331 showing a comparative example for comparison with the bypass pipe 31 (see Fig. 2) of the present embodiment. The bypass pipe 331 of the comparative example of Fig. 4 is provided with an adjustment valve 334. The adjustment valve 334 has a rotating shaft 392, a valve body 393, and an abutting member 394.

The bypass pipe 331 of the comparative example has an inner cylinder portion 395, an outer cylinder portion 396, and a heat insulating material 397. The abutment member 394 is welded to the inner tubular portion 395. The inner cylindrical portion 395 shown in Fig. 4 is stainless steel or the like. However, the inner cylindrical portion 395 is in direct contact with the high-temperature exhaust gas, and thus thermal deformation, cracking, or the like may occur. Further, due to the deformation and cracking, there is a possibility that peeling of the surface of the outer tubular portion 396 or corrosion or breakage of the steel sheet may occur, and there is a problem that replacement or repair is required.

On the other hand, in the regenerative exhaust gas purification device 1 of the present embodiment, as described above, the ceramic fiber molded body 91 is provided inside the inner cylindrical portion 95, so that the gas flowing through the inside of the bypass pipe 31 can be reduced. The occurrence of heat caused by heat. Thereby, the service life of the bypass pipe 31 can be extended.

Further, the bypass pipe 331 of the comparative example is a mounting member 404 welded to the outer wall portion 401 of the combustion chamber 310, and the inner cylindrical portion 395 is attached by welding. When the inner tubular portion 395 is thermally expanded by the passage of the exhaust gas, since the outer wall portion 401 and the outer tubular portion 396 are not heated to such an extent, stress is repeatedly generated in the welded portion or the like. Therefore, cracks or the like may occur in the inner cylindrical portion 395 and its mounting portion.

On the other hand, in the regenerative exhaust gas purification device 1 of the present embodiment, since the ceramic fiber molded body 91 is provided inside the inner cylindrical portion 95, the gas flowing through the inside of the bypass pipe 31 can be reduced. The bad situation caused by the heat occurred. Thereby, the service life of the bypass pipe 31 can be extended.

Moreover, the joint portion of the abutting member 394 and the inner tubular portion 395 is welded to the bypass pipe 331 of the comparative example. The welded portion is directly heated by the hot gas. The valve body 393 that performs the closing operation in this state exerts a force toward the inner tubular portion 395 side. Therefore, damage may occur in the welded part.

On the other hand, in the regenerative exhaust gas purification device 1 of the present embodiment, as described above, the ceramic fiber molded body 91 maintains the temperature of the welded portion of the contact member 94 and the inner cylindrical portion 95, so that it can be prevented from occurring in the welded portion. Bad situation.

Next, the bypass pipe 31 of the first modification will be described based on Fig. 5 . In the regenerative exhaust gas purification device 1 of the present embodiment, the bypass pipe 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 attachment member 110. The bypass pipe 31 of the first modification can also exhibit the same effects as those described above by the molded body 91 of the heat insulating material.

Next, the connection portion between the exhaust pipe and the bypass pipe will be described in detail based on Fig. 2 . In the regenerative exhaust gas purification apparatus 1 of the present embodiment, the inner cylinder member 120 is provided in a portion where the bypass pipe 31 is connected to the exhaust pipe 83. The inner tubular member 120 is a cylindrical body whose both ends are open, and an opening is formed on a surface facing the bypass pipe 31. The exhaust pipe 83 is divided into an inner region 120a and an outer region 120b by the inner tubular member 120 in the cross-sectional direction thereof. Inner cylinder member 120 The mounting plate 121 provided on the inner surface of the exhaust pipe 83 and the mounting plate 122 provided on the outer surface of the inner tubular member 120 are fixed to the exhaust pipe 83 by bolts or the like. As such, the exhaust gas that is guided from the bypass pipe 31 to the exhaust pipe 83 is guided to the inner region 120a of the inner cylinder member 120. That is, the inner cylinder portion 95 of the bypass pipe 31 is connected to the inner cylinder member 120, and the exhaust gas in the inner cylinder portion 95 passing through the bypass pipe 31 is guided into the inner cylinder member 120 of the exhaust pipe 83, and It is discharged to the downstream side.

In the inner region 120a of the inner cylinder member 120, there is a higher temperature exhaust gas guided from the bypass pipe 31, and on the other hand, the outer region 120b of the inner cylinder member 120 has a discharge port from the lower portion of the regenerators 11, 12. 22, 23 are guided to the lower temperature exhaust of the exhaust pipe 83. The higher temperature exhaust gas guided to the inner region 120a of the inner cylinder member 120 is mixed with the lower temperature exhaust gas flowing into the inner region 120a to be cooled, and then cooled by the lower temperature exhaust gas on the outer side of the inner cylinder member 120.

Further, the inner cylinder member 120 may be a member in which the upstream end is closed and the downstream end is open, in which case the exhaust of the exhaust pipe 83 may pass through the outer region 120b of the inner cylinder member 120, and on the other hand, from the bypass pipe 31. The exhaust gas flowing into the inner cylindrical portion 95 is discharged to the downstream side through the inner region 120a of the inner tubular member 120.

In the case where the inner cylinder member 120 is not provided, the wall surface of the exhaust pipe 83 is directly exposed to the high-temperature exhaust gas passing through the bypass pipe 31, the wall surface is thus heated, and deformation or surface coating of the exhaust pipe 83 may occur. Peel off. However, according to the regenerative exhaust gas purification apparatus of the present embodiment, the high-temperature exhaust gas can be prevented from directly flowing into the exhaust pipe 83 and the exhaust pipe 83 by the inner cylinder member 120. contact.

In the regenerative exhaust gas purification device 1 of the present embodiment, the inner cylinder member 120 is provided at the connection portion of the exhaust pipe 83 and the bypass pipe 31 to form a double structure, so that the high temperature discharge from the bypass pipe 31 can be prevented. The gas is in direct contact with the exhaust pipe 83. Further, since the lower temperature gas flows outside the inner cylinder member 120, the cooling effect can also be exhibited. As a result, the regenerative exhaust gas purification apparatus 1 of the present embodiment can prevent deformation or cracking of the exhaust pipe 83 and peeling of the surface coating.

Next, the bypass pipe 131 of the second modification will be described based on Fig. 6 . The regenerative exhaust gas purification device 1 of the present embodiment may be provided with the bypass pipe 131 shown in Fig. 6 instead of the bypass pipe 31 shown in Fig. 2 . In the case where the bypass pipe 131 is provided, the inner tubular member 120 may be provided in the exhaust pipe 83.

The bypass pipe 131 is a curved path that is curved with respect to a linear path that is connected by the shortest distance from the first flow rate adjusting valve 34 to the exhaust pipe 83. Since the bypass pipe 131 is a curved path, the passage time of the exhaust gas becomes longer than the straight path.

Specifically, the bypass pipe 131 is set such that the time during which the exhaust gas passing through the first flow rate adjusting valve 34 merges with the exhaust pipe 83 is 0.1 second to 1.5 seconds. Here, the time is a value calculated based on the average flow rate in the bypass pipe 131 determined by the excess heat generated in the combustion chamber 10 and the average flow velocity determined by the pipe diameter (sectional area).

The regenerative exhaust gas purification device 1 using the bypass pipe 131 of the second modification shown in Fig. 6 is effective in the case of treating a gas having a strong odor. For example, in the case of treating vinyl acetate, if the residence time is insufficient, an intermediate of acetic acid which is more odorous may be generated.

The bypass pipe 131 is constructed by casting the refractory material 131a on the inner surface thereof, and the exhaust gas can be retained in a high temperature state, so that it is not affected by the operating conditions, and the odor is often in a state of complete decomposition (complete combustion). A stronger gas such as acetic acid is guided to the exhaust pipe 83.

Next, a structure in which the regenerative exhaust gas purification device 1 is divided into two in the upper and lower directions will be described with reference to Figs. 7 to 12 . Since the regenerative exhaust gas purification device 1 is configured to be divided into two by the upper and lower sides, the size of the entire device is reduced, and the accessory components (the filter case 87, the control panel cover 86, and the ladder to be described later) are removed. In the state of the air pipe 89 for the combustion, the exhaust pipe 83, and the bypass pipe 31), the units that are divided into two are vertically formed, for example, to the extent that they can be stacked on the transport vehicle (width 3000 mm, height 3180 mm, The length is 5500mm), which is very advantageous. In other words, the regenerative exhaust gas purification device 1 can be carried into the site in a state where it is separated only into the upper unit and the lower unit.

Since the structure is divided into two upper and lower portions, the assembly operation after the site loading can be reduced to a minimum required, that is, only the lower unit can be mounted (fixed), the upper unit and the lower unit can be combined, and Installation of accessory parts. In the past, the assembly on site was very complicated. However, by forming the structure divided into two, the assembly process was completed by the assembly of the upper and lower bodies and the attachment of the accessories. In this way, the construction period at the site can be shortened, and the overall construction period can be shortened. Further, the above dimensions are an example in consideration of a frequently used transport vehicle.

Specifically, as shown in FIGS. 7 and 9 , the regenerative exhaust gas purification device 1 includes a first housing 41 and a second housing 42 that can be coupled and separated from each other. The combustion chamber 10 is provided in the first housing 41. The plurality of regenerators 11 and 12 have a portion on one end (upper end) side of the first housing 41 and a portion on the other end (lower end) side of the second housing 42. In other words, the upper portion of the flow port forming member 24 (see FIG. 13) which will be described later in the second frame body 42 functions as the heat storage chambers 11 and 12. Since the first frame 41 and the second frame 42 are joined, 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 opening and closing valves 14 and 15 and the discharge opening and closing valves 16 and 17 are provided in the second casing 42.

Next, the division position of the upper and lower units, and the division positions of the respective units and accessories will be described. The PPA in Fig. 7 indicates the division position A, and the details of the division position A are shown in Fig. 8(A). The division position A is a position at which the upper unit 70 and the lower unit 50 are vertically divided. The upper unit 70 and the lower unit 50, which are divided at the division position A, form a state as shown in Fig. 9. The PPB in Fig. 7 indicates the division position B, and the details of the division position B are shown in Fig. 8(B). The division position B is a position at which the lower unit 50 and the filter box 87 are divided, and more specifically, a position at which the nozzle unit 50a of the lower unit 50 and the air supply duct 87a from the filter box 87 are divided. The filter box 87 of the accessory component divided from the lower unit 50 at the division position B will be in the state shown in Fig. 10.

The PPC in Fig. 7 indicates the division position C, and the details of the division position C are shown in Fig. 8(C). The division position C is a position at which the upper unit 70 and the bypass pipe 31 are divided, and more specifically, the nozzle of the upper unit 70 The portion 70a and the opening/closing valve 34 provided in the bypass pipe 31 are divided. The PPD in Fig. 7 indicates the division position D, and the details of the division position D are shown in Fig. 8(D). The division position D is a position at which the lower unit 50 and the exhaust pipe 83 are divided, and more specifically, a position at which the nozzle portion 50b of the lower unit 50 and the joint portion 83a of the exhaust pipe 83 are divided. The exhaust pipe 83 (with the bypass pipe 31) divided from the upper unit 70 and the lower unit 50 at the divided positions C and D is in the state shown in Fig. 9.

The PPE in Fig. 7 indicates the division position E, and the details of the division position E are shown in Fig. 8(E). The division position E is a position at which the lower unit 50 and the attachment portion 86a of the control panel shelter 86 are divided. The control panel shelter 86 of the attached component that is divided from the lower unit 50 at the division position E will be in the state shown in Fig. 9. The PPF in Fig. 7 indicates the division position F, and the details of the division position F are shown in Fig. 8(F). The division position F is a position at which the upper unit 70 and the attachment portion 85a of the ladder 85 are divided. The ladder 85 of the accessory component divided from the upper unit 70 at the division position F is in the state shown in Fig. 9.

The PPG in Fig. 7 indicates the division position G. The division position G is a position at which the combustion blower 60 and the air pipe 89 of the lower unit 50 are divided. The PPH in Fig. 7 indicates the division position H. The division position H is a position at which the combustion unit 76 of the upper unit 70 and the air piping 89 are divided. The air piping 89 divided from the combustion blower 60 and the combustion unit 76 at the divided positions G and H is in the state shown in Fig. 10 . The above-described division position A to division position H respectively become a joint position at the time of field installation. Moreover, the fixing at each joint position (divided position) is using a bolt/nut or the like. Fixed component.

Next, the lower unit 50 will be described based on Fig. 11. The lower unit 50 has a second frame body 42 and a base member 51, and a second frame body 42 as a supply portion of the two regenerators 11 and 12 is attached to the base member 51. The second frame body 42 has a shape that is integrated with the combustion chamber 10 and the first frame body 41 that functions as the heat storage chambers 11 and 12 (the shape of the horizontal plane is substantially the same). Further, the second frame body 42 is integrally provided with a columnar member 42a for attachment to the base member 51. A sound insulating plate 53 and a door leaf 68 that constitute the side surface of the lower unit 50 are attached between the columnar members 42a of the second frame body 42. The interior of the lower unit 50 is for the door leaf 68 to pass through and out.

In the inside of the second housing 42, as shown in FIG. 1 and FIG. 11(D), the on-off valves 14, 15, 16, and 17 functioning as a switching damper are provided. These on-off valves 14, 15, 16, and 17 are lift type ("also referred to as lift dampers") in which the valve bodies 14a, 15a, 16a, and 17a move up and down.

A thermocouple 66 as an inlet thermometer and a thermocouple 67 functioning as an outlet thermometer are attached to the inlet portion and the outlet portion of the second housing 42 that functions as a supply unit. A blower 56 is attached to the base member 51 inside the partition partitioned by the baffle 53. The blower 56 and the second casing 42 communicate with each other via the duct 56a as shown in Fig. 1 .

An air tank 43 and a differential pressure transmitter 59 are attached to a lower portion of the second housing 42 that functions as a supply unit. The air tank 43 may also be referred to as a header, and stores compressed air for driving the above-described opening and closing valves 14, 15, 16, and 17 as air switching dampers by air. The air tank 43 is connected to an air cylinder which is a driving portion of the opening and closing valves 14, 15, 16, and 17 by an air tube (not shown).

The differential pressure transmitter 59 is a device for measuring the main differential pressure of the regenerative exhaust gas purification device 1. The differential pressure transmitter 59 connects the inlet portion and the outlet portion of the supply portion 52 to each other by a pipe. The combustion blower 60 is a base member 51 provided inside the baffle plate 53, and the discharge port is communicated with the upper unit 70 via an air pipe 89.

An air supply plate 54 is attached to the side surface of the second housing 42. The air supply muffler 61 and the air supply fan 62 feed air into the space inside the baffle plate 53 to perform internal ventilation. Further, the ventilated air is discharged by the exhaust muffler 63. Further, an inspection port is provided on the side surface of the second frame body 42, and an inspection port cover 69 is attached to the inspection port.

The main control board 64 is disposed on the base member 51, and the machine in the lower unit 50 is connected by wires. Further, the machine with respect to the upper unit 70 is wired via the relay box 65.

Next, the upper unit 70 will be described based on Fig. 12. The upper unit 70 includes a first housing 41, and the combustion chamber 10 is formed in the first housing 41. A burner 75 and a combustion unit 76 are mounted in the combustion chamber 10. The fuel and combustion air are supplied to the combustor 75 after being adjusted to an appropriate flow rate in the combustion unit 76. A plurality of thermocouples 80 are mounted on the upper portion of the combustion chamber 10 or the like. The thermocouple 80 is arranged to determine the temperature within the combustion chamber 10. The temperature inside the furnace is controlled by the output of the thermocouple 80 and the burner 75.

A burner control panel 77 for controlling the combustion unit 76 is mounted at an upper portion of the combustion unit 76. These are arranged in the burner cabin 73. Further, the first frame body 41 is provided with a cover plate 74 for accessing the burner dam 75. The burner control panel 77 is a relay box by wires and the lower unit 50 65 connections. The heat insulating material 78 is attached to the inside of the combustion chamber 10 and the first frame body 41 which functions as the heat storage chambers 11 and 12, and is made into a heat insulation structure. Heat storage bodies 26 and 27 are provided inside the casing 71.

Next, a state in which the upper unit 70 and the lower unit 50 are coupled will be described based on Fig. 1 . An upper unit 70 is connected to the upper side of the lower unit 50. The exhaust pipe 83 is connected to the lower unit 50, and is extended toward the upper side and then exhausted toward the lateral direction by the elbow. Further, the exhaust pipe 83 and the upper unit 70 are coupled by a thermal bypass damper (bypass pipe 31).

The combustion blower 60 in the lower unit 50 and the combustion unit 76 of the upper unit 70 are connected by an air pipe 89 for combustion. Thereby, combustion air is supplied to the combustion unit 76.

The ladder 85 is connected to the upper unit 70 and is accessible to the operator and the upper unit 70. The control panel shelter 86 is fixed to the lower unit 50, and protects the worker from rain or the like when the main control panel 64 (see Fig. 6) is operated.

A cold air intake damper 88 is attached to the upper portion of the filter box 87. This is a device for introducing an external gas at the start of the regenerative exhaust gas purification device 1. Further, the filter box 87 is for removing foreign matter or the like in the gas to be treated, and is connected to the blower 56 in the lower unit 50.

Next, as shown in Fig. 1, a partition wall 13 is formed between the two regenerators 11 and 12 of the regenerative exhaust gas purification device 1, and the heat storage bodies 26 and 27 are thermally separated by the partition wall 13. Further, the burner 75 is provided on the side surface portion of the first casing 41 in order to suppress the size of the upper unit 70 in the height direction.

The second frame body 42 and the first frame body 41 have the same size in the horizontal plane, and are formed in a cubic shape in which the size in the height direction is reduced. The partition wall 18 is provided inside the second frame body 42, and the partition wall 18 can be divided into a space 18a that functions as the supply ports 20 and 21, and a space 18b 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 opening and closing valve will be described based on Fig. 13(B). The supply opening and closing valves 14 and 15 and the discharge opening and closing valves 16 and 17 are so-called lift dampers (lift valves). Specifically, the opening and closing valves 14 to 17 include a flow port forming member 24 in which the flow ports 24a, 24b, 24c, and 24d are provided. In the exhaust gas purifying device 1, the flow port forming member 24 is formed to be common to the four opening and closing valves. Common components. Further, a member that forms a flow path when the gas flows into/out of the regenerators 11 and 12 is also a common member (second casing 42). Thereby, the structure becomes simple, and thus miniaturization can be achieved.

Further, the opening and closing 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 a direction approaching and departing from the flow port forming member 24. That is, the valve bodies 14a to 17a are the front ends of the rods 14c, 15c, 16c, 17c attached to the cylinders 14b to 17b, and are movable in accordance with the expansion and contraction of the rods 14c to 17c. The valve bodies 14a to 17a are closed by the movement and abutment in a direction close to the flow port forming member 24, and the flow ports 24a to 24d are closed. At the same time, the valve bodies 14a to 17a are separated from the flow port forming member 24, and the flow ports 24a to 24d are opened. The cylinders 14b to 17b drive the valve bodies 14a to 17a in the aforementioned abutting and separating directions (vertical direction).

Further, as shown in FIG. 13(B), the valve bodies 14a to 17a are disposed on the opposite side (lower side) of the heat storage bodies 26 and 27 with respect to the flow port forming member 24. The valve bodies 14a to 17a are moved in the direction (upper side) close to the heat storage bodies 26, 27, and the flow ports 24a to 24d are closed. Further, the valve bodies 14a to 17a are moved in the direction (lower side) away from the heat storage bodies 26 and 27, and the flow ports 24a to 24d are opened. According to this feature, the size in the height direction of the regenerative exhaust gas purification device 1 can be reduced.

For comparison and explanation, the structure used in the past is shown in Fig. 13(A). Since the conventional valve body 214 is disposed on the upper side with respect to the flow port forming member 224, a space for the valve body 214 to move between the flow port forming member 224 and the heat storage body is required. The sealing member 214d is provided on the side of the flow port forming member 224. Further, the rod 214c of the cylinder 214b becomes long, and thus the intermediate bearing 225 is required. A lubricant supply portion 225a is provided in the intermediate bearing 225. On the other hand, the opening and closing valves 14 to 17 shown in Fig. 13(B) do not require an intermediate bearing, and the structure can be simplified and the size can be reduced. Further, by providing the sealing members 14d to 17d on the side of the valve bodies 14a to 17a, the replacement of the sealing member can be easily performed.

Further, as shown in Fig. 13(B), the valve bodies 14a to 17a can form the sealing members 14d to 17d at the portion (upper portion) where they abut against the flow port forming member 24. The sealing 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 lubricating oil supply portion 25 is provided at the rods 14c to 17c.

The supply opening and closing valves 14 and 15 and the discharge opening and closing valves 16 and 17 In the second frame body 42 , the second frame body 42 is provided with a partition wall in which the portion of the second frame body 42 that is lower than the flow port forming member 24 is divided into two spaces 18 a and 18 b. 18. A supply port 20 provided in one of the heat storage chambers 11 and a supply port 21 provided in the other heat storage chamber 12 are formed in one space 18a partitioned by the partition walls 18. In the other space 18b, a discharge port 22 provided in one of the heat storage chambers 11 and a discharge port 23 provided in the other heat storage chamber 12 are formed. Since the flow port forming member 24 is formed as 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 partitioned by the partition wall 18, it is simple and compact. The state of switching between the air supply side and the exhaust side of the regenerators 11 and 12 is performed. In other words, the mechanism for switching the flow direction of the gas flowing through the combustion chamber 10 and the regenerators 11 and 12 can be downsized, and the entire apparatus can be downsized.

Further, as shown in Fig. 1, the second frame body 42 is provided with a partition wall 19 that divides a portion above the flow port forming member 24 into two spaces 19a and 19b. The partition wall 19 is provided so as to be substantially parallel to the partition wall 13 provided in the combustion chamber 10 and positioned substantially in the same plane, and the heat storage chambers 11 and 12 are formed together with the partition wall 13. The one space 19a partitioned by the partition 19 functions as a part of the regenerator 11 . The other space 19b functions as a part of the regenerator 12 . Further, 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 in a substantially orthogonal state in order to exhibit the function.

By switching the above-described on-off valves 14 to 17 every time a predetermined time elapses, the supply side (the side supplying the processed gas) and the row of the regenerators 11 and 12 are switched. The gas side (discharged side of the treated gas) is operated. In addition, the timing of switching the on-off valve may also be performed according to the temperature of the inlet and outlet (the temperature of the supplied gas and the exhaust gas is measured by a temperature sensor). The bypass pipe 31 as a heat discharge damper is capable of exhausting the exhaust gas in order to protect the apparatus when excessive heat is generated. Further, the amount of heat load in the preliminary heating step and the heat recovery (heat storage) step of the heat storage body is lowered.

The supply ports 20 and 21 are exhaust gas supply pipes instead of the general type, and the exhaust gas is supplied through the space 18a inside the second frame 42. A blower 56 is connected to the gas supply space 18a, and exhaust gas of the gas to be processed discharged from various devices through the filter tank 87 can be supplied. The filter box 87 has a function of removing dust in the exhaust gas, and also has a function of relaxing the pressure fluctuation. The exhaust gas is discharged through the space 18b in the second housing 42 at each of the discharge ports 22 and 23. An exhaust pipe 83 is connected to the gas discharge space 18b, and the processed gas is discharged to the outside via the exhaust pipe 83. A bypass pipe 31 is connected to the middle of the exhaust pipe 83.

Further, in the regenerative exhaust gas purification device 1, the second housing 42 is configured as a lower unit 50 together with the base member 51 for fixing and attaching the second housing to the installation position, and is used for mounting the base member 51. The blower 56 is guided to the blower 56 of the supply ports 20 and 21, and the sound insulating plate 53 is attached between the base member 51 and the second frame 42.

Further, in the regenerative exhaust gas purification device 1, the first housing 41 includes the upper unit 70, and the second housing 42 includes the lower unit 50. Therefore, the width of each of the upper and lower units 70 and 50 is 2500 to 3000 mm. The height is 2500 to 3180mm and the length is 4000 to 5500mm. These widths, The height and length dimensions take into account the handling restrictions in Japan, but in countries with different handling restrictions, it is only necessary to change the size. In other words, the size of the width, height, and length of the exhaust gas purification device 1 is a size in consideration of the conveyance limit. As described above, by reducing the components of the upper unit 70 and the lower unit 50 to the limit and miniaturizing, the upper unit 70 and the lower unit 50 are suppressed in the above-described size range, and the upper unit 70 and the lower unit can be divided. The on-site loading of the unit 50 can greatly reduce the assembly and installation on site, which not only reduces the installation cost, but also minimizes the stoppage of the production line at the destination.

Further, in the regenerative exhaust gas purification device 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 are provided to connect the windings to each other. The connection terminals 100a and 100b to which the communication cable 100 of the plurality of signal lines is connected are connected. Thereby, the communication cable 100 can be provided only on the burner control panel 77 instead of the wiring operation of the respective machines on the upper unit 70 side required in the field. As a result, it will achieve a significant reduction in wiring work on site.

Next, an exhaust gas purification method using the regenerative exhaust gas purification device 1 of the above-described embodiment will be described. First, as shown in Fig. 1, the regenerator 12 is the supply side, and the regenerator 11 is the discharge side. The gas to be treated passes through the space 18a of the second frame 42 and passes through the supply port 20 to reach the regenerator chamber 11.

When the exhaust gas passes through the heat storage body 27 on the heat storage chamber 12 side of the first casing 41, the exhaust gas is heated by heat exchange with the heat storage body 27. On the other hand, the heat storage body 27 dissipates heat/cools. Heated by the heat accumulator 27 and The exhaust gas reaching the combustion chamber 10 undergoes combustion decomposition of the contained components in the combustion chamber 10.

Next, the burned processed gas passes through the heat storage body 26 of the regenerator 11 . At this time, the treated gas can be cooled by heat exchange with the heat storage body 26. On the other hand, the heat storage body 26 stores heat. The cooled treated gas passes through the discharge port 22 and passes through the space 18a of the second frame 42 to reach the exhaust pipe 83.

When this operation is continued, the heat storage body 27 of one of the regenerators 12 is cooled/cooled, and the heat storage body 26 of the other regenerator 11 stores heat/heat. Therefore, after a certain period of time elapses, the opening and closing valve 15 of the supply port 21 of the regenerator 12 is closed, and the opening and closing valve 17 of the discharge port 23 is opened. At the same time, the opening and closing valve 14 of the supply port 20 of the regenerator 11 is opened, and the opening and closing valve 16 of the discharge port 22 is closed. By this operation, the flow direction of the gas is reversed, the regenerator 12 is switched to the discharge side, and the regenerator 11 is switched to the supply side.

Therefore, the exhaust gas to be treated next can be heated by heat exchange with the heat storage body 26 which is sufficiently heat-storing. The heated exhaust gas is treated in the combustion chamber 10 and cooled and exhausted by heat exchange with the heat storage body 27. After a certain period of time elapses, the opening and closing valve 15 of the supply port 21 of the regenerator 12 is opened, and the opening and closing valve 17 of the discharge port 23 is closed. At the same time, the opening and closing valve 14 of the supply port 20 of the regenerator 11 is closed, and the opening and closing valve 16 of the discharge port 22 is opened. By this action, the flow direction of the gas is reversed, the regenerator 12 is switched to the supply side, and the regenerator 11 is switched to the discharge side.

The above actions are repeated every certain period of time, and the operation is continued, whereby efficient combustion treatment using exhaust heat can be performed.

The temperature in the combustion chamber 10 is such that the temperature of the thermocouple 80 is measured, and the output of the burner 75 is adjusted so that the value becomes a constant temperature. When the amount of processing components contained in the exhaust gas is large, the temperature in the combustion chamber 10 rises due to the combustion of the component. Therefore, when the measured value of the thermocouple 80 reaches a certain temperature, the output of the burner 75 is turned OFF and the operation is performed. Further, when the measured value of the thermocouple 80 reaches a certain temperature, excess heat is released through the bypass pipe 31 which functions as a heat bypass damper. This adjustment control is performed by adjusting the temperature of the thermocouple 80 provided in the combustion chamber 10 while adjusting the first flow rate adjustment valve 34.

As described above, the regenerative exhaust gas purification apparatus 1 of the present embodiment includes the combustion chamber 10, the pair of regenerators 11 and 12, the supply ports 20 and 21, the discharge ports 22 and 23, the heat storage bodies 26 and 27, and the exhaust gas. The tube 83 and the bypass pipe 31 are provided with a molded body 91 of a heat insulating material in a region where the first flow rate adjusting valve 34 is provided in the bypass pipe 31. Thereby, it is possible to reduce the occurrence of defects due to the heat of the exhaust gas flowing inside the bypass pipe 31.

Further, the regenerative exhaust gas purification device 1 includes first and second housings 41 and 42 that can be coupled and separated, and the combustion chamber 10 is provided in the first housing 41, and the thermal storage bodies 26 and 27 are provided in the first housing. 41. The opening and closing valves 14 and 15 of the supply ports 20 and 21 and the opening and closing valves 16 and 17 of the discharge ports 22 and 23 are provided in the second casing 42.

As described above, the regenerative exhaust gas purification device 1 can simplify the installation and assembly in the field by miniaturizing and unitizing the device, and minimizes the work period. Further, the control panel can be unitized in accordance with the unitized portion, whereby the wiring work on the site can be greatly reduced.

Here is a regenerative exhaust gas purification device that is divided into two ways. Although the invention is not limited thereto, for example, the regenerative exhaust gas purification device may be configured to be carried in the field and assembled on site.

Next, a regenerative exhaust gas purification apparatus according to another embodiment of the present invention will be described based on Fig. 14 . The regenerative exhaust gas purification device 141 of this embodiment is provided in addition to the structure of the regenerative exhaust gas purification device 1 of the first embodiment, and is provided outside the combustion chamber 10 for recovery in the combustion chamber 10. a hot heat recovery device (heat recovery system) 140; a heat recovery bypass pipe 142 provided to connect the combustion chamber 10 and the heat recovery device 140; and a second flow rate provided in the heat recovery bypass pipe 142 The valve 143 is adjusted. Further, the outlet side of the heat recovery device 140 is connected to the exhaust pipe 83.

The heat recovery bypass pipe 142 is a pipe that utilizes heat generated in the combustion chamber 10 by the heat recovery device 140 provided outside. In the vicinity of the second flow rate adjustment valve 143 on the inner side surface of the heat recovery bypass pipe 142, a molded body of a heat insulating material may be provided in the same manner as the pipe 31 around the first flow rate adjustment valve 34.

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

The regenerative exhaust gas purification device 141 further includes: a pressure detector 144 that detects the pressure in the combustion chamber 10; and a detection based on the pressure detector 144 As a result, the control unit 146 of the third flow rate adjustment valve 145 provided in the exhaust pipe 83 is controlled.

The static pressure range of the combustion chamber 10 detected by the pressure detector 144, for example, by the third flow rate adjusting valve 145 may be controlled to 30 to 250 mmAq. Further, the opening degree of the third flow rate adjusting valve 145 is preferably 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. Therefore, excess heat can be stably supplied to the heat recovery device 140. That is, the static pressure in the combustion chamber 10 may vary depending on conditions such as the concentration of the exhaust gas or the temperature at the time of inflow. The flow rate of the gas flowing into the heat recovery device 140 through the heat recovery bypass pipe 142 is proportional to the static pressure difference between the combustion chamber 10 and the heat recovery device 140. Therefore, the static pressure of the combustion chamber 10 is preferably stable. In the regenerative exhaust gas purification device 141, the third flow rate adjustment valve 145, the pressure detector 144, and the control unit 146 can stably supply excess heat for stable heat recovery.

Here, in the regenerative exhaust gas purification device 141 of the present embodiment, the duct for excess heat discharge is provided with both the bypass pipe 31 and the heat recovery bypass pipe 142, but the invention is not limited thereto. In other words, a heat recovery device 140 may be provided between the first flow rate adjusting valve 34 of the bypass pipe 34 and the connection portion of the exhaust pipe 83. Even in this case, the same effects as those exhibited by the above-described regenerative exhaust gas purification device 141 can be obtained.

Next, a modification of the opening and closing valve of the air supply/exhaust valve as the regenerative exhaust gas purification device will be described based on Fig. 15 . In the above-described regenerative exhaust gas purification apparatuses 1 and 141, the on-off valves 14 to 17 which are provided as the air supply/exhaust valves in the regenerators 11 and 12 are provided with the on-off valves 14 to 17 described in Fig. 13(B). Miniaturization and the like can be achieved.

However, in the regenerative exhaust gas purification apparatuses 1 and 141 of the present embodiment, the on-off valve 164 shown in Fig. 15 can be used. The opening and closing valve 164 is a lift type on-off valve as shown in Fig. 15.

The opening and closing valve 164 has a valve body 164a, a cylinder 164b, a rod 164c, and a sealing member 164d. The opening and closing valve 164 is in a posture with respect to the valve body 164a in the closed state, and is gradually opened in the first oblique direction S1. At the same time, when it is operated in the opening direction, it gradually moves 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 gradually performed obliquely toward the second oblique direction S2 opposite to the first oblique direction S1.

The first oblique direction S1 and the second oblique direction S2 are line symmetrical with respect to the center of the rod 164c in the same plane including the rod 164c. The valve body 164a is coupled to the rod 164c via a joint 164f. The joint 164f can incline the valve body 164a in one direction and the opposite direction (the first and second oblique directions S1, S2) in the same plane.

In the opening and closing valve 164, a hammer body 168 is provided on the upper surface of the valve body 164a and on the outer peripheral side so that the valve body 164a is inclined in the first oblique direction S1. On the upper surface of the valve body 164a, a restricting member 169 that prevents the abutting portion 164e of the valve body 164a from rising is provided by abutting against the valve body 164a at a position symmetrical with the position at which the hammer body 168 is provided. The hammer body 168 is, for example, about 5 to 50 kg. By the restricting member 169, the tilt range of the controlled opening and closing valve 164 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 operates in parallel with the original posture, and gradually opens in the second oblique direction S2. Here, the opening and closing valve 165 has substantially the same structure as the opening and closing valve 164. However, since the position of the weight 168 and the position of the regulating member 169 are different, the tilting direction of the valve body 165a in the opening and closing valve 165 (first and The second oblique direction) is opposite to the directions S1 and S2 of the opening and closing valve 164. One of the opening and closing valves 164 and 165 is for air supply, and the other is for exhaust.

When the 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 alleviated.

1‧‧‧ Regenerative exhaust gas purification device

10‧‧‧ combustion chamber

11,12‧‧‧Reheating room

13‧‧‧ next door

14,15,16,17‧‧‧Open valve

31‧‧‧ Bypass

34‧‧‧1st flow adjustment valve

56‧‧‧Air blower

83‧‧‧Exhaust pipe

91‧‧‧Forms of ceramic fibers

95‧‧‧Inner tube

96‧‧‧Outer tube

97‧‧‧Insulation

101‧‧‧Outer wall

102‧‧‧Insulation

103‧‧‧Ceramic fiberboard

120‧‧‧Inner tubular components

Claims (10)

A regenerative exhaust gas purification device that uses a regenerator to purify exhaust gas, and includes: a combustion chamber that combusts exhaust gas; and a plurality of regenerators that are connected to the combustion chamber at one end thereof; The other end of each of the regenerators, and an on/off valve for supplying a supply of a process gas to the regenerator; and the other end of each of the plurality of regenerators for discharging a process gas from the regenerator a discharge opening/closing valve; a heat storage body provided in each of the plurality of heat storage chambers; an exhaust pipe connected to the discharge opening and closing valve; and a bypass pipe provided to communicate the exhaust pipe and the combustion chamber a first flow rate adjusting valve for adjusting a flow rate of exhaust gas flowing from the combustion chamber to the exhaust pipe; and the first flow rate adjusting valve provided on an inner side surface of the bypass pipe a molded body in which a heat insulating material is attached to a region; and an inner tubular member that divides a region in the exhaust pipe into an inner region and an outer region thereof in a portion of the exhaust pipe to which the bypass pipe is connected In the inner region of the inner tubular member of the exhaust pipe, there is a higher temperature exhaust gas flowing from the bypass pipe and flows out to the downstream side thereof, and the outer region of the inner tubular member is not inside the exhaust pipe. The higher temperature exhaust gas after passing through the aforementioned bypass pipe is guided, but the lower temperature exhaust gas flows in from the upstream of the exhaust pipe and goes down there The side of the swim out. The regenerative exhaust gas purification device according to the first aspect of the invention, wherein the molding system of the heat insulating material is formed into a tubular ceramic fiber molded body. The regenerative exhaust gas purification device according to claim 2, wherein the first flow rate adjustment valve includes a rotation shaft rotatably fixed to an inner side surface of the bypass pipe, and a valve fixed to the rotation shaft And a side surface of the bypass pipe that protrudes inwardly from the molded body of the ceramic fiber, and abuts against the contact member of the valve body when the valve body is rotated and closed. The regenerative exhaust gas purification device according to the first aspect of the invention, wherein the bypass pipe has a time when the exhaust gas reaches the exhaust pipe from the first flow rate adjustment valve for a predetermined period of time. 1 The flow regulating valve is bent to the curved path of the aforementioned exhaust pipe. The regenerative exhaust gas purification device according to claim 4, wherein the predetermined time is 0.1 second to 1.5 seconds. The regenerative exhaust gas purification device according to claim 5, further comprising: a heat recovery device disposed outside the combustion chamber and recovering heat generated in the combustion chamber; and communicating the foregoing combustion a heat recovery bypass pipe provided in a chamber and the heat recovery device, wherein the heat recovery bypass pipe is provided with a second flow rate adjustment for adjusting a flow rate of exhaust gas flowing from the combustion chamber to the heat recovery device Whole valve. The regenerative exhaust gas purification device according to claim 6, further comprising: a third flow rate adjusting valve provided on an upstream side of a position of the exhaust pipe connected to the bypass pipe; and detecting the combustion a pressure detector of the pressure in the chamber; and a control unit that controls the opening degree of the third flow rate adjusting valve by the pressure detected by the pressure detector. The regenerative exhaust gas purification device according to claim 7, wherein at least one of the supply opening and closing valve and the discharge opening and closing valve is a lift type open/close valve, and the lift type open/close valve is closed with respect to a closed state. The posture of the valve body is gradually tilted toward the first tilting direction, and gradually moves to be parallel to the posture of the valve body in the closed state when operating in the opening direction, and is oriented toward the first one when operating in the opening direction. The second oblique direction in which the oblique direction is the opposite direction is gradually inclined to perform the opening operation. The regenerative exhaust gas purification device according to claim 8, wherein the valve body of the lift type on-off valve is provided with a hammer body that inclines the valve body in the first oblique direction, and a position symmetrical position of the hammer body is provided with a restriction member that abuts against the valve body to prevent the abutting portion of the valve body from rising, and the valve system abuts against the restriction member, thereby closing and closing The state of the valve body moves in a parallel manner. The regenerative exhaust gas purification device according to any one of claims 1 to 9, further comprising: a first frame body and a second frame body that can be coupled and separated, wherein the combustion chamber and the heat storage system are provided In the first casing, the supply opening and closing valve and the discharge opening and closing valve are provided in the second casing.