JP2008086994A - Wet exhaust gas treating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a low-cost wet exhaust gas treating device which neither provides a plurality of gas-liquid contact sections nor becomes large-sized as a whole, nor needs a broad installation area and which is capable of efficiently and effectively treating the exhaust gas. <P>SOLUTION: One laterally positioned partition plate 2 is disposed inside a cylindrical casing 1 to partition the casing into an upper casing 3 and a lower casing 4, and the lower casing is provided with a gas supply port 6 and the upper casing is provided with an exhaust gas port 7, respectively, a number of concentrical slits 8 that allow a gas introduced from the gas supply port to pass through the laterally positioned partition plate as inclined flow are provided, an upper casing wall is provided with the port 9 and a drain port 10, a closed hollow internal cylinder 11 that extends vertically is mounted inside the upper and lower casings at substantially the center of the laterally positioned partition plate, a vertically positioned damming-up plate 13 is provided between the outer peripheral surface of the internal cylinder and the internal peripheral surface of the upper casing, and a supply water port and the drain port are positioned on both sides of the damming-up plate and sandwiches it. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a wet exhaust gas treatment apparatus.

  As a typical example of this type of conventional wet exhaust gas treatment apparatus, the one shown in FIG. 14 is well known, and this will be described. It has a sideways filler portion 52 arranged inside the casing 51, and is divided into an upper casing 53 and a lower casing 54, an air supply port 56 is provided in the lower casing 54, and an exhaust port 57 is provided in the upper casing 53, respectively. Further, a water supply port 58 is provided in the upper casing wall, and a drain port 59 is provided in the lower casing 54, so that the gas introduced from the air supply port 56 and the cleaning water introduced from the water supply port 58 are passed through the filler 52. Through-holes are provided.

  In such a case, exhaust gas is supplied from the air supply port 56 of the lower casing 54 into the lower casing 54, rises through the through hole of the filler 52, and is exhausted from the exhaust port 57 of the upper casing 53. On the other hand, the cleaning water supplied from the water supply port 58 of the upper casing 53 spreads on the filler portion 52 and flows down through the through holes, and is discharged from the drain port 59 of the lower casing 54. In addition, the cleaning water comes into gas-liquid contact in the filler portion 52, and the exhaust gas is processed.

  The exhaust gas is treated by contacting the exhaust gas and the washing water when moving as described above. However, since both of them are in contact with each other as described above, a single unit is required for gas-liquid contact. In the case where only the filler portion is provided, the contact time is short, so that there is a problem that the treatment efficiency is low and it is difficult to effectively perform the exhaust gas treatment. Therefore, in order to solve such a problem, it is necessary to provide a plurality of filler parts as shown in the figure, so that the entire apparatus becomes large and expensive, and a wide installation place is required. There is a problem.

  Accordingly, the object of the present invention is to solve the problems of the conventional wet exhaust gas treatment apparatus as described above, provide a plurality of gas-liquid contact portions, and not to increase the size of the entire apparatus, and to provide at low cost. In addition to the above, it is an object of the present invention to provide a wet exhaust gas treatment device that does not require a wide installation place and that can perform exhaust gas treatment with high processing efficiency and effectively.

  In order to achieve the above object, the present invention provides a wet exhaust gas treatment apparatus in which a horizontal partition plate is disposed inside a cylindrical casing, and A number of concentric slits that divide the casing and the lower casing, have an air supply port in the lower casing, and an exhaust port in the upper casing, and allow the gas introduced from the air supply port to pass through the horizontal partition plate as an inclined flow The upper casing wall is provided with a water supply port and a drain port, and a closed hollow internal cylinder extending in the vertical direction in the upper and lower casings is attached to substantially the center of the horizontal partition plate. The outer peripheral surface of the inner cylinder and the upper casing A vertical weir plate is provided between the inner peripheral surface and the water supply port and the drain port are located on both sides of the stop plate.

  The inventions other than those described in claim 1 are modifications of these inventions, and details of the inventions described in all claims will be made clear in the following embodiments.

  Since the present invention is as described above, it is not necessary to provide a plurality of gas-liquid contact portions, the entire apparatus is not increased in size, and can be provided at a low cost. In addition, there is an effect that the treatment efficiency is high and the exhaust gas treatment can be performed effectively.

  In the invention according to any one of the first to tenth aspects, a plurality of concentric slits for allowing the gas introduced from the air supply port to pass as an inclined flow are provided in the horizontal partition plate that partitions the upper casing and the lower casing. Water supply is provided on both sides of a vertical weir plate provided between the outer peripheral surface of the inner cylinder and the inner peripheral surface of the upper casing, which is a closed hollow type extending in the vertical direction in the upper and lower casings in the approximate center of the partition plate. Since the outlet and the drainage port are provided, the exhaust gas becomes an inclined flow in the slit, while the washing water supplied from the water supply port into the upper casing is the weir established between the inner cylinder and the water supply port and the drainage port. Since the annular flow path is formed by the stop plate, without flowing the linear short distance between the water supply port and the drain port on the partition plate, it flows a long distance around the upper casing, Tilt like this The exhaust gas rises become the washing water flowing in the upper casing over long distances, contact vigorously and a large contact area in a fluidized state, stably with high efficiency there is an effect that exhaust gas treatment is performed.

  The invention according to claim 3 is provided with a plurality of vertical partition plates inside the upper casing, and the vertical partition plate has an upper end edge extending above the drainage port, and a lower end edge located higher than the horizontal partition plate. Since the vertical partition plate and the vertical partition plate whose upper edge is located below the drain outlet and whose lower edge is located on the horizontal partition plate, the washing water flows in the upper casing. At this time, since it becomes a turbulent state and receives a stirring action, the concentration of the cleaning water becomes uniform, and the exhaust gas is uniformly cleaned.

  In the invention according to claim 4, since the inner cylinder is formed of a transparent material and an ultraviolet lamp is provided in the inner cylinder, the exhaust gas is efficiently decomposed by a chemical reaction between the washing water and the ultraviolet rays. effective.

  According to the seventh and eighth aspects of the present invention, the upper part of the inner cylinder is located in the heat exchange chamber, the lower part is located in the lower casing, a heat pipe is installed inside the inner cylinder, and the upper part of the inner cylinder Radiating fins are projected on the outer periphery, and the photocatalytic substance film made of titanium oxide is provided on the upper and lower surfaces and slit surfaces of the horizontal partition plate, the inner peripheral surface of the upper and lower casings, and the outer peripheral surface of the inner cylinder. The exhaust gas treatment and the heat recovery of the exhaust gas are performed in parallel, and it is not necessary to configure each component member with a special heat resistant material, and it can be configured at low cost, and the recovered heat is used as another heat source. It can be used and has the effect of improving the energy saving effect.

  In each embodiment of the present invention shown in the drawings, common portions are denoted by the same reference numerals, description thereof is omitted, and different portions are mainly described.

  In the first embodiment shown in FIGS. 1 and 2, one horizontal partition plate 2 is disposed inside a cylindrical casing 1, divided into an upper casing 3 and a lower casing 4, and supplied to the lower casing 4. A vent 6 is provided with an exhaust port 7 in the upper casing 3, and concentric slits that are inclined toward a large number of outer peripheral surfaces that allow the gas introduced from the air supply port 6 to pass through the horizontal partition plate 2 as an inclined flow. 8, a water supply port 9 and a drain port 10 are provided in the upper and lower peripheral walls of the upper casing 3, and a closed hollow internal cylinder 11 extending in the vertical direction in the upper and lower casings 3 and 4 at the approximate center of the horizontal partition plate 2. A vertical weir plate 13 is provided between the outer peripheral surface of the inner cylinder 11 and the inner peripheral surface of the upper casing 3, and the water supply port 9 and the drain port 10 are disposed on both sides of the stop plate 13. positioned. The lower end of the weir plate 13 is in contact with the upper surface of the horizontal partition plate 2.

  An exhaust pipe 15 connected to the exhaust port 7 is provided with an eliminator 16 and an exhaust fan 17. The upper casing 3 and the eliminator 16 and the lower casing 4 are connected by condensate pipes 21 and 22. A first original water supply pipe 23 is connected to the lower casing 4, and the lower casing 4 and the drain outlet 9 are connected by a water supply pipe 24.

  When the exhaust gas treatment is performed by such a method, the cleaning water in the lower casing 4 is supplied from the water supply port 9 of the upper casing 3 through the water supply pipe 24, and a part is drained from the drain port 10 of the upper casing 3. Through the condensate pipe 21, the other part spreads on the horizontal partition plate 2, flows down in the slit 8, and returns to the lower casing 4. On the other hand, exhaust gas is supplied from the air supply port 6 of the lower casing 4 during this time, passes through the slit 8, is sucked by the exhaust fan 17, rises in the upper casing 3, and is exhausted from the exhaust port 7. In this way, when the exhaust gas rises from the air supply port 6 to the exhaust port 7, the exhaust gas is cleaned in gas and liquid contact with the cleaning water in the slit 8 and the upper casing 3.

  During the exhaust gas treatment as described above, the exhaust gas becomes an inclined flow in the slit 8, while the cleaning water supplied from the water supply port 9 into the upper casing 3 is between the inner cylinder 11 and the water supply port 9 and the drain port 10. Since the annular flow path is formed by the established weir plate 13, the inside of the upper casing 3 does not flow on the horizontal partition plate 2 over a short linear distance between the water supply port 9 and the drain port 10. Will flow around a long distance. The exhaust gas that rises as an inclined flow in this manner and the cleaning water that flows in the upper casing 3 over a long distance come into contact with each other violently and in a large contact area in a flowing state, and a stable exhaust gas treatment with high efficiency is performed. Will be.

  In the second embodiment shown in FIG. 3, two horizontal partition plates 2-1 and 2-2 are arranged inside a cylindrical casing 1, and upper casings 3-1 and 3-2 and a lower casing are arranged. 4, an air supply port 6 is provided in the lower casing 4, an exhaust port 7 is provided in the upper casings 3-1 and 3-2, and a water supply port 9 is provided in the upper and lower peripheral walls of the upper casings 3-1 and 3-2. -1,9-2 and drain ports 10-1, 10-2 were provided and inclined toward a large number of centers through which the gas introduced from the lower part of the horizontal partition plates 2-1 and 2-2 passed as an inclined flow. A concentric slit 8 is provided, and an upper hollow casing 3-1, 3-2 and a closed hollow inner cylinder 11 extending in the vertical direction in the lower casing 4 are attached to substantially the center of the horizontal partition plates 2-1, 2-2. The outer peripheral surface of the inner cylinder 11 and the inner peripheral surface of the upper casings 3-1 and 3-2 The water supply ports 9-1, 9-2 and the drain ports 10-1, 10-2 are located on both sides of the dam plate 13, with the dam plate 13 being provided on the both sides. Is in contact with the upper surface of the horizontal partition plate 2.

  In the upper casings 3-1 and 3-2 of the second embodiment, the exhaust gas is processed in the same manner as the upper casing 3 in the first embodiment, but a process with a higher degree of cleaning is performed. Will be. In this embodiment, the upper casing is two upper casings 3-1 and 3-2, but a larger number may be used as necessary.

  In the third embodiment shown in FIGS. 4 and 5, radial vertical partition plates 25 are provided between the outer peripheral surface of the inner cylinder 11 and the inner peripheral surface of the upper casing 3 in the first embodiment shown in FIGS. The vertical partition plate 25 has an upper end extending to the upper side of the drain port 10, a lower end edge positioned higher than the horizontal partition plate, and an upper end edge below the drain port 10. The configuration is different from that of the first embodiment in that the vertical partition plates 25-2, whose lower end edges are positioned on the horizontal partition plate 2, are alternately arranged at a predetermined angle. is there.

  In such a case, when the washing water flows in the upper casing 3, it becomes a turbulent state and is subjected to a stirring action, so that the concentration of the washing water becomes uniform and the exhaust gas is uniformly washed. Will be done.

  The fourth embodiment shown in FIG. 6 is different from the second embodiment shown in FIG. 3 in that the upper casings 3-1 and 3-2 are both upper casings 3-1 and 3 of the third embodiment shown in FIGS. -2, a radial vertical partition plate 25 is provided between the outer peripheral surface of the inner cylinder 11 and the inner peripheral surface of the upper casings 3-1 and 3-2. A vertical partition plate 25-1 extending above the ports 10-1 and 10-2 and having a lower end edge positioned higher than the horizontal partition plates 2-1 and 2-2 and an upper end edge of both drain ports 10 -1 and 10-2 are located below the vertical partition plates 25-2 whose lower end edges are located on the horizontal partition plates 2-1 and 2-2, and are alternately arranged at a predetermined angle. It is. Such a thing has the same effect as the second and third embodiments.

  In the fifth embodiment shown in FIG. 7, the inner cylinder 11 is made of a transparent material and the ultraviolet lamp 26 is provided in the inner cylinder 11 in the first embodiment shown in FIGS. In such a case, the exhaust gas is efficiently decomposed by a chemical reaction between the washing water and the ultraviolet rays.

  The sixth embodiment shown in FIG. 8 is the same as the fifth embodiment shown in FIG. 7 except that the upper and lower casings 3 and 4 are made of a transparent material, and the upper and lower surfaces of the horizontal partition plate 2 and the inner peripheral surfaces of the upper and lower casings 3 and 4. In addition, a photocatalyst film 27 made of titanium oxide is provided on the outer peripheral surface of the inner cylinder 11.

  The seventh embodiment shown in FIG. 9 is the same as the sixth embodiment shown in FIG. 8 except that an ultraviolet lamp 26 is provided outside the upper and lower casings 3 and 4 and exhibits the same function as the sixth embodiment. To do.

  The eighth embodiment shown in FIG. 10 has upper and lower casings 3 and 4 as upper casings 3-1 and 3-2 in the seventh embodiment shown in FIG. The lower casing 4 is provided with an air supply port 6, the upper casings 3-1 and 3-2 are provided with exhaust ports 7, and the upper and lower peripheral walls of the upper casings 3-1 and 3-2 are respectively supplied with water supply ports 9-1 and 9-2. In addition, the drain ports 10-1 and 10-2 are provided, and the others are the same as in the seventh embodiment.

  In the sixth, seventh, and eighth embodiments as described above, the photocatalytic substance film 27 allows the separation, decomposition, sterilization, deodorization, and the like of harmful chemical substances in the exhaust gas, fungi, bacteria, viruses, dust, and the like. Further, the clogging of the slits 8 due to these processes and the adhesion of dirt to the surface of each part are prevented.

  The ninth embodiment shown in FIG. 11 is the same as the first embodiment shown in FIGS. 1 and 2, in which a heat exchange chamber 28 is provided in the upper part of the upper casing 3, and the upper part of the inner cylinder 11 is located in the heat exchange chamber 28. The lower part is located inside the lower casing 4, a heat pipe 29 is installed inside the inner cylinder 11, and heat radiating fins 31 project from the upper outer periphery of the inner cylinder 11.

  The tenth embodiment shown in FIG. 12 is similar to the sixth embodiment shown in FIG. 8 in the ninth embodiment shown in FIG. A photocatalytic material film 27 made of titanium oxide is provided on the peripheral surface and the outer peripheral surface of the inner cylinder 11.

  In the ninth and tenth embodiments as described above, the treatment of the exhaust gas with the washing water and the heat recovery of the exhaust gas are performed in parallel, and each constituent member including the casing is made of a special heat resistant material. Therefore, it is possible to configure the apparatus at low cost, and the recovered heat can be used as another heat source, so that an energy saving effect can be obtained.

  The eleventh embodiment shown in FIG. 13 is similar to the first embodiment shown in FIGS. 1 and 2 in that an air supply pipe 36 connected to the air supply port 6 and an exhaust pipe 15 connected to the exhaust port 7 are an annular trachea. Connected with 38. In this embodiment, the primary-treated exhaust gas discharged to the exhaust pipe 15 is recirculated to the air supply port 6 to increase the processing efficiency. Reference numeral 39 denotes an electromagnetically operated on / off valve provided in the second source air supply pipe 36, the exhaust pipe 15 and the recirculation pipe 38. The exhaust gas is circulated by the control of the on / off valve 39.

FIG. 3 is a partially cut longitudinal front view taken along line 1-1 of FIG. 2 of the first embodiment of the present invention. It is the cut longitudinal view which cut | disconnected the same with the line 2-2 and was seen to the arrow direction. It is a vertical front view of the principal part of the second embodiment. It is a vertical front view of the principal part of the same third embodiment. It is the cut longitudinal view which cut | disconnected the same with the line 5-5 and looked at the arrow direction. It is a vertical front view of the principal part of the 4th Embodiment. It is a longitudinal cross-sectional view of the principal part of the fifth embodiment. It is a vertical front view of the principal part of the 6th embodiment. It is a vertical front view of the principal part of the 7th embodiment. It is a vertical front view of the principal part of the 8th embodiment. It is a vertical front view of the principal part of the 9th embodiment. It is a longitudinal front view of the principal part of the 10th embodiment. FIG. 14 is a longitudinal sectional view of a main part of the eleventh embodiment. It is a longitudinal front view of a conventional wet exhaust gas treatment apparatus of the same type as the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Casing 2 Horizontal partition plate 3 Upper casing 4 Lower casing 6 Air supply port 7 Exhaust port 8 Slit 9 Water supply port
10 Drain port 11 Internal cylinder
13 Dam plate 15 Exhaust pipe
16 Eliminator 17 Exhaust fan
21 Condensate pipe 22 Condensate pipe
23 First water supply pipe 24 Water supply pipe
25 Vertical divider 26 UV light
27 Photocatalytic material coating 28 Heat exchange chamber
29 Heat pipe 31 Radiation fin
36 Supply pipe 38 Ring trachea
39 On-off valve

Claims (10)

  One horizontal partition plate is arranged inside the cylindrical casing, and is divided into an upper casing and a lower casing, an air supply port is provided in the lower casing, and an exhaust port is provided in the upper casing. A large number of concentric slits that allow the gas introduced from the air supply port to pass as an inclined flow are provided, a water supply port and a water discharge port are provided in the upper casing wall, and the inside of the upper and lower casings is vertically arranged in the approximate center of the horizontal partition plate. A closed hollow internal cylinder extending in the direction is mounted, and a vertical weir plate is provided between the outer peripheral surface of the inner cylinder and the inner peripheral surface of the upper casing. The water supply port and the drain port sandwich the stop plate. A wet exhaust gas treatment apparatus, characterized in that it is located on both sides.   A plurality of horizontal horizontal partition plates are arranged inside a cylindrical casing, and divided into a plurality of upper casings and a single lower casing, an air supply port is provided in the lower casing, and an exhaust port is provided in the uppermost casing. A water supply port and a drain port are provided on the peripheral walls of both upper casings, and concentric slits that are inclined toward a large number of outer peripheral surfaces that allow gas introduced from the lower portion to pass through as an inclined flow are provided in each horizontal partition plate. A closed hollow inner cylinder that extends vertically in the upper and lower casings is installed at the approximate center of the partition plate, and a vertical dam is provided between the outer peripheral surface of the inner cylinder and the inner peripheral surface of the upper casing. A wet exhaust gas treatment apparatus characterized in that a plate is provided, and both the water supply port and both the water discharge ports are located on both sides of the weir plate.   The wet exhaust gas treatment apparatus according to claim 1 or 2, wherein a radial vertical partition plate is provided between the outer peripheral surface of the inner cylinder and the inner peripheral surface of the upper casing, and the upper end edge of the vertical partition plate has a drain outlet. A vertical partition plate that extends to the top and whose lower end edge is positioned above the horizontal partition plate, and a vertical partition plate whose upper end edge is positioned below the drain outlet and whose lower end edge is positioned above the horizontal partition plate Are arranged alternately at a predetermined angle.   The wet exhaust gas treatment apparatus according to any one of claims 1 to 3, wherein the inner cylinder is formed of a transparent material, and an ultraviolet lamp is provided in the inner cylinder.   5. The wet exhaust gas treatment apparatus according to claim 4, wherein the upper and lower casings are made of a transparent material, and the upper and lower surfaces and slit surfaces of the horizontal partition plate, the inner peripheral surface of the upper and lower casings, and the outer peripheral surface of the inner cylinder are made of titanium oxide. A wet exhaust gas treatment apparatus characterized by comprising a photocatalytic substance film.   6. The wet exhaust gas treatment apparatus according to claim 5, wherein an ultraviolet lamp is provided outside the upper and lower casings.   The wet exhaust gas treatment apparatus according to any one of claims 1 to 3, wherein a heat exchange chamber is provided in an upper part of the upper casing, an upper part of the inner cylinder is located in the heat exchange room, and a lower part is located in the lower casing. A wet exhaust gas treatment apparatus, characterized in that a heat pipe is installed inside the inner cylinder, and heat radiating fins protrude from the outer periphery of the upper part of the inner cylinder.   8. The wet exhaust gas treatment apparatus according to claim 7, wherein a photocatalytic material film made of titanium oxide is provided on the upper and lower surfaces of the horizontal partition plate, the inner peripheral surface of the upper and lower casings, and the outer peripheral surface of the inner cylinder. Exhaust gas treatment equipment.   The wet exhaust gas treatment apparatus according to claim 7 or 8, wherein an air supply pipe connected to the air supply port and an exhaust pipe connected to the exhaust port are connected by an annular air pipe. Processing equipment.   The wet exhaust gas treatment apparatus according to claim 9, wherein an eliminator and an exhaust fan are provided in the exhaust pipe.

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