JP3226025U - Exhaust gas reformer and flue gas treatment device including the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a novel flue gas reformer capable of efficiently treating flue gas containing a large amount of oil and greatly reducing the frequency of exhaust duct cleaning work and the like, and a flue gas treatment apparatus provided with the same. SOLUTION: A flue gas reformer 100 has a cylindrical casing 110 having a flue gas inlet 111 and a flue gas outlet 112 communicating with an exhaust duct, and a windmill-shaped rotation positioned so as to traverse the inside of the casing 110. And a member 120. As a result, the oil mist in the flue gas is finely decomposed and reformed into a gas state, so that oil does not adhere to the inner wall of the exhaust duct and the like, and the frequency of cleaning the exhaust duct can be greatly reduced. . [Selection diagram] Figure 1

Description

  The present invention relates to a flue gas reformer for efficiently treating flue gas containing a large amount of oil mist emitted from a restaurant kitchen, a yakiniku restaurant, a yakitori restaurant, and the like, and a flue gas treatment apparatus including the same. is there.

  In general, smoke generated in restaurant kitchens, grilled meat, and yakitori stores contains a large amount of oil (oil mist), so the exhaust duct through which this oil flows has a filter or oil separator to separate and remove the oil. Will be needed. Conventionally, as a filter for separating oil in flue gas, in addition to a metal filter using a metal mesh, for example, a filter using a nonwoven fabric as shown in Patent Document 1 below is often used.

  On the other hand, as the oil separator other than the filter, for example, a baffle system, an inversion baffle system as shown in Patent Document 2 below, or a device having a spiral passage constituted by spiral blades is used. Further, in the following Patent Documents 3 and 4, one or more windmill-shaped ones provided with a plurality of blades around a rotating shaft are arranged in an exhaust duct, and by rotating this, exhaust gas flowing through the exhaust duct is discharged. It has been proposed to capture oil mist in smoke and centrifuge it.

JP, 2000-24433, A JP-A-60-34713 JP, 2002-239323, A JP 2012-120947 A

  By the way, in the conventional filter method, if the oil separated by the filter accumulates, the filter will be clogged, and thus it is troublesome that it must be frequently cleaned or replaced. On the other hand, in an oil separator using a baffle plate or centrifugal separator, the oil separated from the smoke exhausts adheres to the baffle plate, the surface of the windmill, and the inside of the exhaust duct, so that the location is disassembled. There is an inconvenience that various cleaning work must be performed regularly.

  Therefore, the present invention was devised in order to solve these problems, and its main purpose is to efficiently treat smoke containing a large amount of oil and to reduce the frequency of exhaust duct cleaning work. It is an object of the present invention to provide a novel flue gas reformer that can be significantly reduced and a flue gas treatment apparatus including the same.

  In order to solve the above-mentioned problems, a first invention includes a tubular casing having a smoke exhaust inlet and a smoke exhaust outlet communicating with an exhaust duct, and a windmill-shaped rotating member positioned so as to cross the casing. The rotating member includes a motor, a hub provided on a rotation shaft of the motor, and a plurality of rods radially extending from the hub.

  According to such a configuration, when the smoke exhaust containing the oily mist (oil mist) generated in the store or in the kitchen is caused to flow from the exhaust duct into the casing, the rotating member in the casing is rotated at high speed. When the plurality of rods violently collide with the oil mist in the flue gas, the rods are further finely decomposed and the particle diameter thereof is reformed from mist to gas. As a result, the oil mist does not adhere to the inner wall of the casing or the surface of the rotating member, but flows directly to the downstream side together with the exhaust gas and is released into the atmosphere, so that it does not adhere to the inner wall of the exhaust duct. The frequency of such cleaning work can be greatly reduced.

  In a second aspect based on the first aspect, the rotating member has a first rod group located at an axial front end of the hub and a second rod group located at an axial rear end of the hub. It is a flue gas reformer characterized by. According to such a configuration, since more oil mist in the smoke exhaust collides with each rod, reforming from mist form to gaseous form is promoted.

  A third invention is an exhaust gas reformer characterized in that, in the first or second invention, a spiral groove is formed on the surface of each rod. According to such a configuration, since the unevenness is formed on the surface of the rod, the Karman vortex generated on the rear side in the rotation direction of the rod, that is, the air resistance is reduced and the rod rotates at a high speed even with a small driving force. As a result, the impact force and the contact area between the rod and the oil mist become large, so that the reforming into a gas state is promoted. Further, noise of the rotating member due to air resistance can be suppressed.

  According to a fourth invention, an exhaust duct is provided with the flue gas reformer according to any one of claims 1 to 3, an electric dust collector, a blower, and a deodorizer from the upstream side in the flue gas flow direction. A flue gas treatment device characterized by being provided in order. According to such a configuration, not only can the amount of oil adhering to the exhaust duct be significantly reduced even for smoke exhaust containing a large amount of oil mist emitted from a restaurant with a fryer, a yakiniku restaurant, a yakitori restaurant, etc. Since soot and odor components contained in the flue gas can also be removed, it can be effectively treated.

  According to the present invention, the oil mist in the flue gas containing mist-like oil (oil mist) is finely decomposed and reformed into a gas state, so that the oil mist is formed on the inner wall of the casing and the surface of the rotating member. Without adhering, it is flowed to the downstream side together with the exhaust gas and is released into the atmosphere. This prevents oil from adhering to the inner wall of the exhaust duct, etc., so that the frequency of cleaning the exhaust duct can be greatly reduced.

1 is a perspective view showing an embodiment of a flue gas reformer 100 according to the present invention. 1 is a front view showing an embodiment of a flue gas reformer 100 according to the present invention. It is the sectional view on the AA line in FIG. FIG. 4 is a partially enlarged view showing an S part in FIG. 3. It is an exploded view of the S section in FIG. It is a conceptual diagram which shows the reforming condition of oil mist. It is explanatory drawing which shows one Embodiment of the smoke emission processing apparatus 200 which concerns on this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. 1 to 6 show an embodiment of a flue gas reformer 100 according to the present invention, and FIG. 7 shows an embodiment of a flue gas treatment device 200 incorporating the flue gas reformer 100. It shows the morphology. First, as shown in FIG. 7, the flue gas reformer 100 constitutes a part of a flue gas treatment device 200 provided in an exhaust duct D extending from the inside of a store or a kitchen.

  That is, the flue gas treatment device 200 includes the flue gas reformer 100, the electric dust collector 300, the blower 400, and the deodorizer 500 according to the present invention in order from the upstream side in the flow direction of the flue gas (indoor smoke). It is a connected structure. Although the structure and operation of the flue gas reformer 100 will be described in detail later, the flue gas reformer 100 mainly reforms oil mist contained in flue gas and sends it to the electrostatic precipitator 300. The electrostatic precipitator 300 applies electric charges to the fine particles of various dusts such as soot dust contained in the flue gas and draws them to the dust collecting electrode to collect them.

  The blower 400 sucks the smoke generated in the store or the kitchen together with the indoor air into the exhaust duct D and discharges it to the outside, and is composed of, for example, a sirocco fan driven by a motor. The deodorizer 500 adsorbs or decomposes odorous components in flue gas to deodorize, and is composed of, for example, a multi-layered deodorizing filter in which activated carbon or air catalyst is carried on a porous plate. There is.

  Therefore, according to the smoke treatment apparatus 200, as shown in FIG. 7, indoor smoke generated in a store, a kitchen, or the like is first sucked into the exhaust duct D by the suction force of the blower 400 together with the indoor air, and then first. By passing through the flue gas reformer 100, the contained oil mist is reformed, and after passing through the electrostatic precipitator 300, fine particles of various dusts such as soot dust are removed to produce colorless and transparent exhaust gas. Be cleaned. Then, the exhaust gas from the electrostatic precipitator 300 passes through the chamber 410 and the blower 400 in this order and is sent to the deodorizer 500, where odorous components are removed or decomposed, and then become colorless / odorless gas. It will be released into the atmosphere.

  As shown in FIGS. 1 to 3, the flue gas reformer 100 includes a cylindrical casing 110 and a windmill-shaped rotating member 120 positioned so as to cross the inside of the casing 110. The casing 110 is open at both ends, one of which serves as a smoke exhaust inlet 111 communicating with the exhaust duct D, and the other of which serves as a smoke exhaust outlet 112 communicating with the electrostatic precipitator 300. An annular flange 113 is provided around the smoke exhaust inlet 111, and the exhaust duct D is connected to the inlet of the electrostatic precipitator 300 so as to sandwich the flange 113 as shown in FIG. It is provided so as to traverse the inside of the duct D.

  The rotating member 120 includes a motor 121, a hub 123 provided on a rotating shaft 122 of the motor 121, and a plurality of rods R extending radially from the hub 123. Further, as shown in FIG. 4, the rotating member 120 includes a first rod group R1 provided at the axial front end of the hub 123 (on the side of the smoke exhaust port 112) and the axial rear end of the hub 123 (flue gas exhaust). It has a second rod group R2 provided on the inlet 111 side).

  Each rod R constituting the rod groups R1 and R2 is composed of a metal rod (round bar) having high strength and high corrosion resistance such as stainless steel, and its size is, for example, 1 to 1.5 mm in diameter and long. It is about 100 to 200 mm. Then, about 100 rods for each rod group R1 are attached to the hub 123 in a radial manner, about 200 rods at a substantially same angle in total. Further, as shown in the drawing, spiral grooves g are formed on the surface of each of the rods R.

  FIG. 5 is an enlarged cross-sectional view in which the hub 123 is disassembled. The hub 123 is composed of a disk-shaped hub body 12a to which the rotary shaft 122 of the motor 121 is connected, and a pair of fixing plates 12b and 12b attached to both surfaces of the hub body 12a by bolts B, respectively. By fitting the base portions of the rods R into a plurality of mounting grooves 12c formed along both side edges of the hub body 12a and then attaching the respective fixing plates 12b and 12b, the rods R are centered on the hub body 12a. It can be attached and fixed radially. The root portion of the rod R is bent into an L shape, and by inserting the tip into the hole of the mounting groove 12c so as to be inserted, each rod R has a hub body even if pulling force or centrifugal force is applied. It does not fall out of 12a.

  In the flue gas reformer 100 of the present invention having such a structure, as shown in FIG. 5, indoor smoke containing mist-like oil (oil mist) generated in the store or in the kitchen is exhausted from the exhaust duct D into the casing 110. At the time of flowing, the rotating member 120 in the casing 110 is rotated at a high speed by the motor 121 to exert its function. That is, when the rotating member 120 is rotated at a high speed, the plurality of rods R violently collide with the oil mist in the flue gas, and as shown in FIG. 6, this is further finely decomposed and its particle diameter changes from mist to gas. Is reformed into a shape.

  The particle size of the oil mist generated in the store or in the kitchen varies depending on the generation source, etc., but in general, the particle size is about 0.1 to 10 μm. Among them, it is known that particularly those having a large particle diameter of 4 μm or more are easily affected by inertial force and gravity, so that they are separated from the flow of exhaust gas and collide with and adhere to the inner wall of the exhaust duct. This phenomenon is utilized in the conventional oil separator using the baffle system and the reverse baffle system.

  In view of such a phenomenon, the flue gas reformer 100 of the present invention rotates a windmill-shaped rotating member 120 having a large number of rods R at high speed during flue gas containing oil mist as shown in FIG. The particle size of oil mist is finely decomposed to 0.1 μm or less. As a result, the mist-like oil component having a large particle size is reduced to a gaseous state and easily flows along the flow of the exhaust gas, so that the amount of oil adhering to the inner wall of the exhaust duct D is significantly reduced. You can Then, the gaseous oil component flowing to the downstream side of the flue gas reformer 100 is discharged to the atmosphere together with the exhaust gas without being attached to the electrostatic precipitator 300, the blower 400, the deodorizer 500, etc. as it is.

  As a result, the amount of oil adhering to the exhaust duct D is significantly reduced, so that the frequency of such cleaning work can be significantly reduced. The windmill-shaped rotating member 120 and the like are not particularly limited and may vary depending on the amount of oil mist generated, but as a result of a large number of demonstration experiments, in the case of smoke generated at a yakiniku restaurant or a yakitori restaurant Obtained good modification results in the range of about 1000 to 2000 rpm.

  Further, since the spiral groove g is formed on the surface of each rod R, unevenness is formed over the entire surface of the rod R. As a result, the air resistance is reduced by a special air flow generated on the rear side in the rotation (movement) direction of the rod R, that is, the Karman vortex is generated, so that the rod R rotates at high speed even with a small driving force. This increases the collision force and the contact area between the rod R and the oil mist, so that the oil mist is more finely crushed and the reforming into the gas state is promoted. Further, noise (wind noise) of the rotating member 120 can be suppressed by reducing the air resistance.

  In the present embodiment, the first rod group R1 and the second rod group R2 are provided at the front and rear ends in the axial direction of the hub 123 of the rotating member, respectively, and the oil mist is provided in multiple stages over the front and rear two times in the gas flow direction. Although it is crushed, if the number of rods is further increased and the oil mist is crushed three times or more, a more remarkable reforming effect can be obtained. Further, each rod R of the first rod group R1 and the second rod group R2 can be reformed more efficiently by offsetting each rod R in the flow direction of the exhaust gas.

100 ... Smoke exhaust reformer 110 ... Casing 111 ... Smoke exhaust inlet 112 ... Smoke exhaust outlet 120 ... Rotating member 123 ... Hub 12a ... Hub body 12b ... Fixing plate 12c ... Mounting groove 200 ... Smoke exhaust treatment device 300 ... Electrostatic precipitator 400 ... Blower 500 ... Deodorizer D ... Exhaust duct R ... Rod R1 ... First rod group R2 ... Second rod group g ... Groove

Claims (4)

A tubular casing having a smoke exhaust inlet and a smoke exhaust outlet communicating with the exhaust duct, and a windmill-shaped rotating member positioned so as to traverse the inside of the casing,
The flue gas reformer characterized in that the rotating member comprises a motor, a hub provided on a rotating shaft of the motor, and a plurality of rods extending radially from the hub. The flue gas reformer according to claim 1,
The flue gas reformer, wherein the rotating member has a first rod group located at a front end in the axial direction of the hub and a second rod group located at a rear end in the axial direction of the hub. The flue gas reformer according to claim 1 or 2,
A flue gas reformer characterized in that a spiral groove is formed on the surface of each rod.   The exhaust duct is provided with the flue gas reformer according to any one of claims 1 to 3, an electric dust collector, a blower, and a deodorizer in order from the upstream side in the flue gas flow direction. Smoke control device.

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