JP5876274B2 - Deodorizing element cleaning device - Google Patents

Description

  The present invention relates to a deodorizing apparatus for exhaust gas discharged from a dryer or an incinerator for treating organic waste such as sludge, and particularly relates to a deodorizing element cleaning apparatus provided in the deodorizing apparatus. .

Exhaust gas generated during drying of organic waste such as sludge and incineration of waste is released to the atmosphere after removing harmful substances and odors such as volatile organic compounds (VOC) contained therein. Recently, the degree of demand has been further increased.
As a method for deodorizing the exhaust gas, a direct combustion method has been generally used. Such deodorization treatment of exhaust gas by direct combustion is relatively excellent in deodorization performance, but requires a lot of fuel for the deodorization treatment, and is the main purpose of fuel required for drying and incineration. In some cases, more fuel was required for the deodorization treatment.

Therefore, the present applicants have attempted to develop a deodorizing device including a deodorizing element to which cerium oxide (CeO ₂ ) is applied as a catalyst in order to remove harmful substances and odors contained in exhaust gas, and have already filed a patent application. (See Patent Documents 1 and 2).
In the present invention, a deodorizing element is configured by supporting a catalyst on a support base material, and a gas to be treated is supplied to a catalyst unit having the deodorizing element, the temperature of which is adjusted to the optimum operating temperature of the catalyst. That's it. According to this invention, it is possible to remarkably reduce the fuel consumption required for the deodorization treatment of the exhaust gas, and to effectively deodorize the exhaust gas having a high humidity and containing volatile organic substances. It has become.

However, when processing exhaust gas containing dust, it is inevitable that dust will adhere to the deodorizing element, and as the amount of dust attached increases, the pressure loss increases and the processing efficiency decreases. In addition, the power consumption of the blower mechanism increases.
Such pressure loss is small when the supporting base is made of a honeycomb block, but when soot deposition proceeds, the flow of exhaust gas that passes through the ventilation holes in the honeycomb block is hindered. As a result, the pressure loss becomes enormous. For example, in a system that uses a burner to heat the gas to be processed to the optimum operating temperature, the pressure in the system increases, causing burner combustion failure and making it difficult to continue operation. Alternatively, it is inevitable that the catalyst is covered with soot and the efficient contact between the catalyst and the odor component is hindered and the deodorizing function is lowered.
In order to eliminate the pressure loss and regenerate the catalytic function, a regeneration mechanism has been devised that removes the dust adhering to the deodorizing element with purge air.
However, when a device configuration that improves the deodorizing effect by arranging a plurality of deodorizing elements is adopted, the dust removed from the deodorizing elements by the purge air enters into the other deodorizing elements, and then again enters the deodorizing elements. It can occur that it adheres.

Therefore, the present applicant has attempted to develop a deodorizing apparatus equipped with a novel regeneration mechanism for deodorizing elements in order to solve such problems, and has already filed a patent application (see Patent Document 3).
The present invention comprises a nozzle unit that faces the surface of the deodorizing element and is configured to be able to supply purge air to the entire surface of the deodorizing element by being swept. The same number of deodorizing elements is provided, and each nozzle unit is configured to be able to perform a sweep operation individually.
According to the present invention, by sweeping the nozzle unit linearly, the purge air can be uniformly applied over the entire surface of the deodorizing element facing the nozzle unit, so that the dust adhering to the deodorizing element is uniformly effected. Further, the dust removed from the deodorizing element located on the upstream side can be prevented from reattaching to the deodorizing element located on the downstream side.
And after that, the present applicant has continued to develop the cleaning mechanism in the deodorizing apparatus as described above, and in the process, the vent hole is not formed in the surface of the deodorizing element facing the nozzle unit. At the site, it was confirmed that dust may not be sufficiently removed even though purge air is acting, so countermeasures were started.

JP 2011-092910 A JP 2011-147912 A Japanese Patent Application No. 2011-129043

  The present invention has been made from such a background, and in particular, the development of a novel deodorizing element cleaning device capable of effectively removing dust adhering to the surface of the deodorizing element facing the nozzle unit. This is a technical issue.

In other words, the deodorizing element cleaning apparatus according to claim 1 is provided in a deodorizing apparatus that oxidizes and / or decomposes organic matter in exhaust gas containing soot and dust into deodorized exhaust gas by the deodorizing element carrying the catalyst component. A deodorizing element cleaning device, wherein the deodorizing device has the upstream of the exhaust gas flow as the front and the downstream as the rear, and the cleaning device faces the surface of the deodorizing element. a formed shall comprise a nozzle unit that is configured to be able to supply purge air to the entire surface of the deodorizing device by being swept, the nozzle unit includes a nozzle tube spout is formed, together leading to the rear side from the front side of the nozzle tube at the side surface view, venturi mechanism and is equipped et al to form a flow path cross-sectional area is narrowed by partially throttled Der those which is, purge air discharged from the ejection port of the nozzle pipe, by taking a gas deodorizing chamber from the front opening of the venturi mechanism is ejected from the rear opening in a state in which air flow is increased It is configured as described above .

  In addition to the above requirements, the deodorizing element cleaning device according to claim 2 is configured such that the venturi mechanism is formed between a pair of air guide plates positioned vertically opposite to the nozzle tube, and the air guide plates. It is characterized by comprising a side plate that closes both side openings.

  Furthermore, in addition to the above requirements, the deodorizing element cleaning device according to claim 3 is characterized in that the venturi mechanism includes a seal plate that contacts a surface of the deodorizing element facing the nozzle unit. Is.

Furthermore, in addition to the above requirement, the deodorizing element cleaning device according to claim 4 is provided with a plurality of deodorizing elements in series, and the nozzle unit has the same number as the number of deodorizing elements. It is provided, and is characterized in that a ventilation prevention plate is provided on the upstream side of the nozzle unit located on the downstream side .
The above-described problems can be solved by using the requirements described in the respective claims as means.

  First, according to the first aspect of the invention, the air volume of purge air can be increased by the venturi effect, and the cleaning performance of the nozzle unit can be enhanced.

  According to the second aspect of the present invention, the venturi mechanism can be easily installed by retrofitting an existing deodorizing apparatus provided with a nozzle tube. At that time, the air guide plate can be fixed at a predetermined interval by the side plate.

  Furthermore, according to the invention described in claim 3, the seal plate functions as a scraper, and it is possible to efficiently remove the dust adhering to the surface of the deodorizing element facing the nozzle unit. Further, since the purge air is prevented from leaking by the seal plate, the cleaning efficiency by the purge air can be increased.

  Furthermore, according to the invention described in claim 4, by causing the purge air containing the dust removed from the deodorizing element located on the upstream side to collide with the aeration preventing plate, the dust is regenerated on the deodorizing element located on the downstream side. It can prevent adhering. Further, the dust can be separated from the purge air, and dropped to the lower part of the casing to be deposited at that position.

It is a perspective view which shows a partial see-through | perspective deodorizing apparatus with which the cleaning apparatus of the deodorizing element of this invention was provided. It is a side view which shows a part of deodorizing device transparently. It is a perspective view which shows a deodorizing element. It is the front view which shows the nozzle device which varied the form of the spout, and the front view which shows the cleaning apparatus of a deodorizing element, and its peripheral member. It is the perspective view and cross-sectional view which show a nozzle unit. It is the side view which shows the mode of the cleaning by a nozzle unit, and the cross-sectional view which expands and shows the part. It is the side view which shows the mode of the cleaning by the nozzle unit provided with the ventilation | gas_flow prevention board, and the perspective view which expands and shows the part. It is a cross-sectional view which shows the nozzle unit which made the form of a venturi mechanism different.

  The best mode of the deodorizing element cleaning device of the present invention is as shown in the following examples, but it is possible to make appropriate modifications to the examples within the scope of the technical idea of the present invention. .

The “deodorizing element cleaning device” (hereinafter referred to as the cleaning device 5) of the present invention will be described below with reference to the basic configuration of the embodiment, and then the operation mode thereof. Next, the deodorizing apparatus D will be described.
As shown in FIGS. 1 and 2, the deodorizing apparatus D uses the exhaust gas G0 discharged from a dryer, an incinerator, or the like as a gas to be treated, and the organic matter contained in the exhaust gas G0 is obtained by the catalytic action of the deodorizing element 35. It is an apparatus that oxidizes and / or decomposes at a low temperature to produce deodorized exhaust gas G1.

The deodorizing device D is installed on the base B, and is formed so that the heating chamber 1, the air supply chamber 2, the deodorizing chamber 3 and the exhaust chamber 4 communicate with each other, and further deodorizing the deodorizing chamber 3. The element 35 is accommodated and the cleaning device 5 is provided.
In the present specification, the heating chamber 1 side is defined as the front or upstream, and the exhaust chamber 4 side is defined as the rear or downstream.

  First, the heating chamber 1 is provided with a burner 11, which is a portion for burning fuel by the burner 11 and supplying high temperature outside air A to the adjacent supply chamber 2.

  Next, the air supply chamber 2 is formed by connecting a duct 22 to an air supply port 21 formed in the upper part of the housing as an example, and is supplied into the air supply chamber 2 by a fan 23 through the duct 22. The exhaust gas G0 is mixed with the high temperature outside air A so as to be heated.

Next, the deodorizing chamber 3 is configured such that an inlet / outlet 31 is opened on the side surface of the casing, and the deodorizing element 35 can be taken in and out therefrom.
Specifically, a carriage 34 provided with a cover plate 32 and a placement plate 33 is used, and in a state where three units are set in series on the placement plate 33 as an example of the deodorizing element 35, By moving the carriage 34 so that the mounting plate 33 and the deodorizing element 35 enter the deodorizing chamber 3, the entrance / exit 31 can be closed by the lid plate 32.
In addition, the cover plate 32 is appropriately provided with a packing and a lock mechanism so that the confidentiality of the deodorizing chamber 3 can be secured.
As for the arrangement of the deodorizing elements 35, a plurality of deodorizing elements 35 may be arranged in series as described above, or some or all of the deodorizing elements 35 may be arranged in parallel.

Here, the deodorizing element 35 will be described in detail. As shown in FIG. 3, the deodorizing element 35 carries cerium oxide powder (light yellow powder) as a catalyst 37 on the surface of the support substrate 36 and the inner surface of the vent hole 38. It is a thing.
As an example of the support substrate 36, as shown in FIG. 3A, honeycomb-like ceramics having a plurality of air holes 38 are formed in a cubic shape. Then, the support base material 36 is immersed in the slurry prepared by mixing the catalyst 37, water, and a binder, and then dried and fired, so that the surface of the support base material 36 and the inner surface of the air vent 38 are formed. A deodorizing element 35 carrying the catalyst 37 is formed.
The deodorizing element 35 may be configured as a single block piece, or may be configured by combining a plurality of small block pieces. In this embodiment, as an example, four deodorizing element pieces 35a are combined for deodorization. While constituting the member 35, the deodorizing element 35 was held by the frame 39.
Further, a deodorizing element piece 35b configured by dividing the deodorizing element piece 35a in the vertical direction with respect to the vent hole 38 and a deodorizing element piece 35c configured by dividing the deodorizing element piece 35a in the horizontal direction with respect to the vent hole 38 are combined. The deodorizing element 35 may be configured.
In this way, by configuring the deodorizing element 35 with a plurality of element pieces, for example, by exchanging the position of each element piece at regular time intervals, the element piece with a small amount of dust d attached is positioned on the upstream side. The 37 functions can be maintained over a long period of time.

  Further, as shown in FIG. 3B, the support base material 36 may be a small spherical one, and a deodorizing element 35 in which a catalyst 37 is supported on the surface of the support base material 36 may be employed. In this case, it is assumed that the plurality of deodorizing elements 35 are accommodated in a frame 39 on which a net 39a is stretched.

Next, the cleaning device 5 will be described. As an example, this device is provided with a cylinder 56 as a drive unit of a sweep mechanism for a machine frame F standing on the deodorizing chamber 3. The nozzle unit 50 is provided at the tip of the rod 56 a so as to be positioned in the deodorizing chamber 3.
As shown in FIG. 4, the nozzle unit 50 is formed in a rake shape as an example by connecting the center of gravity of a nozzle tube 54 in which a jet port 53 is formed to one end of a vent tube 52.
In this embodiment, as shown in FIG. 4A, a slit-like jet 53 having a width of 1 to 2 mm and a length equivalent to that of the catalyst element 35 is formed. As shown in FIG. 4, the short slit-like jet ports 53 may be arranged in a staggered pattern, or the small-diameter jet ports 53 may be formed densely as shown in FIG.
The tip of the rod 56a is connected to the free end of the vent pipe 52 with a tee 55 interposed between them, and a blower 58 is connected to the air supply port 55a of the tee 55 using a conduit 57. Is done. The conduit 57 is provided with a valve 57a.

As shown in FIG. 5B, the nozzle unit 50 includes a venturi mechanism 51 that forms a flow path from the front side of the nozzle tube 54 to the deodorizing element 35 side in a side view. The venturi mechanism 51 includes a pair of air guide plates 511 and 512 that are located opposite to each other in the vertical direction of the nozzle tube 54, and a side plate 513 that closes both side openings formed between the air guide plates 511 and 512. It is configured. A front opening 518 and a rear opening 519 are formed before and after the venturi mechanism 51.
The side surface shape formed by the air guide plates 511 and 512 is formed such that the cross-sectional area of the flow path is narrowed by being partially squeezed. By adopting such a configuration, as shown in an enlarged view in FIG. 6 (b), the purge air ejected from the ejection port 53 has an increased flow velocity at a portion where the cross-sectional area of the flow path becomes narrower, and the venturi. The gas in the deodorizing chamber 3 will be taken in from the front opening part 518 by an effect. As a result, purge air with an increased air volume is ejected from the rear opening 519, and the cleaning performance of the nozzle unit 50 by the purge air can be enhanced.

In this embodiment, the air guide plates 511 and 512 are assembled to the stud bolts 514 attached to the outer peripheral portion of the nozzle tube 54 using the nuts 515, and such a simple configuration is adopted. As a result, the venturi mechanism 51 can be easily installed by retrofitting the existing deodorizing apparatus D provided with the nozzle tube 54.
Further, according to the method of assembling the air guide plates 511 and 512 using the stud bolt 514 and the nut 515, the distance between the air guide plate 511 and the air guide plate 512 is set to a desired dimension. Therefore, the vertical dimension of the front opening 518 and the rear opening 519 can be adjusted. For this reason, the air volume and injection range of purge air can be changed according to the situation of the dust d adhering to the deodorizing element 35 and the like.
In this case, the side plate 513 is fixed to both ends of the nozzle tube 54 using stud bolts 514 (not shown) and nuts 515 (not shown) in the same manner as the air guide plates 511 and 512. By adopting, it is possible to avoid the side plate 513 from interfering with the adjustment of the distance between the air guide plate 511 and the air guide plate 512.

Further, as shown in FIG. 5, the venturi mechanism 51 is provided with a seal plate 516 in contact with the surface of the deodorizing element 35 facing the nozzle unit 50. Specifically, a seal plate 516 formed of a heat-resistant inorganic cloth having flexibility is sandwiched between the rear end portions of the air guide plates 511 and 512 and the fixing plate 517 as an example.
By adopting such a configuration, the seal plate 516 functions as a scraper, and it is possible to efficiently remove the dust d adhering to the surface of the deodorizing element 35 facing the nozzle unit 50.

  By adopting the above-described configuration, the nozzle unit 50 is swept in the vertical direction to allow purge air to act on the entire surface of the deodorizing element 35 and to be scraped by the seal plate 516.

  The nozzle unit 50 is provided with the same number as the number of the deodorizing elements 35. Hereinafter, when the nozzle units 50 are distinguished, the reference numerals are designated as 501, 502, 503. In this case, the reference numerals are 351, 352, 353,. Similarly, when distinguishing the cylinders 56, reference numerals 561, 562, 563,.

Next, the exhaust chamber 4 has an exhaust port 41 formed in the upper part of the housing as an example, and exhausts the deodorized exhaust gas G1 sent from the deodorization chamber 3 to the outside through the exhaust port 41. It is a part.
The deodorizing apparatus D of this invention is comprised as mentioned above as an example, and the operation | movement aspect is demonstrated below.

[Setting of deodorizing element]
First, the deodorizing element 35 is set inside the deodorizing chamber 3 through the inlet / outlet 31. With the deodorizing elements 351, 352, and 353 set on the mounting plate 33, the mounting plate 33 and the deodorizing element are set. The carriage 34 is moved so that 35 enters the deodorizing chamber 3, and the inlet / outlet 31 is closed by the cover plate 32, thereby ensuring the airtightness of the deodorizing chamber 3.
At this time, as shown in FIG. 6A, the nozzle units 501, 502, and 503 are positioned diagonally in front of the deodorizing elements 351, 352, and 353 (hereinafter, this position is referred to as a standby position). .

〔heating〕
Next, the outside air A heated by the burner 11 in the heating chamber 1 and the exhaust gas G0 as the gas to be processed are supplied into the air supply chamber 2. In this embodiment, as an example, the exhaust gas at 200 ° C. The gas G0 was heated to about 450 ° C.
The exhaust gas G0 is generated during drying of organic waste such as sludge or incineration of waste, and the content of soot and dust d is about 0.5 g / m ³ N by a cyclone dust collector or the like. It has been done.

[Deodorization treatment]
Next, the exhaust gas G0 is sent to the deodorizing chamber 3, and comes into contact with the deodorizing element 35. When the odorous component (volatile organic substance or the like) comes into contact with the catalytic component (cerium oxide), it is oxidized by its catalytic action. , CO ₂ , H ₂ O, etc., and the deodorized exhaust gas G1 is obtained by removing the odor component to a predetermined value or less (for example, the odor index 30 or less). In this embodiment, as shown in FIG. 6A, since the three deodorizing elements 35 are arranged in series, the exhaust gas G0 that has passed through the vent hole 38 in the deodorizing element 351 is subsequently deodorized. In the process of passing through the vent hole 38 and further passing through the vent hole 38 of the deodorizing element 353, the odor component is gradually removed. At this time, the dust d contained in the exhaust gas G0 adheres to the surface of the deodorizing element 35 and the inner surface of the vent hole 38.
Next, the deodorized exhaust gas G1 reaches the inside of the exhaust chamber 4 and is exhausted to the outside.
The cerium oxide (CeO ₂ ) has a deodorizing action effectively at 300 ° C. or higher. For this reason, the temperature of the exhaust gas G0 is heated to 300 ° C. or higher in the air supply chamber 2 and then the deodorizing element 35 is heated. By contacting, the oxidation reaction is promoted.

[Regeneration treatment of deodorizing element]
The deodorizing element 35 is regenerated before the deodorizing element 35 adheres to the dust d and the deodorizing ability of the catalyst 37 is significantly reduced or the pressure loss is excessive. Will be described.
The timing of the regeneration process may be performed at regular intervals by a timer or the like. For example, the pressure loss generated in the deodorizing element 35 is measured by measuring the static pressure difference between the deodorizing chamber 3 upstream and downstream of the deodorizing element 35. The reproduction process may be performed when the value exceeds a certain value.
First, in a state where the regeneration process is not performed, the nozzle units 501, 502, and 503 are positioned at the standby position as shown in FIG.
By extending the rods 56a in the cylinders 561, 562, and 563 at the same speed, the nozzle units 501, 502, and 503 are simultaneously lowered, and the outside air A is sucked and compressed by the blower 58, and the purge air is about 3 to 6 kPaG. Supply at a pressure of.

Thereafter, the nozzle units 501, 502, and 503 face the surface of the deodorizing elements 351, 352, and 353 as shown in FIG. 6B, and are attached to the surface of the deodorizing element 35 by the seal plate 516 by being swept. The dust d is scraped off and purge air is supplied to the entire surface of the deodorizing elements 351, 352, and 353 at a flow rate of about 70 to 100 m / s. The purge air travels in the air hole 38 and blows off the dust d adhering to the inner surface of the air hole 38. This eliminates the pressure loss that has occurred in the deodorizing element 35, as well as the catalyst 37 and the exhaust gas G0. The deodorizing elements 351, 352, and 353 are regenerated. At this time, since the seal plate 516 prevents the purge air from leaking between the air guide plates 511 and 512 and the deodorizing element 35, the cleaning efficiency by the purge air can be increased.
The dust d accumulated in the lower part of the deodorizing chamber 3 is scraped out from an inspection window (not shown) provided in the lower part of the cover plate 32, or a screw conveyor provided in advance at a position where the dust d is accumulated. It is assumed that the paper is automatically discharged by the transport means.
Further, a part of the dust d removed from the deodorizing element 353 may be discharged to the outside through the exhaust chamber 4 and thus is collected by a filter or the like provided at an appropriate location.
The purge air may be heated by a heater or the like and jetted from the nozzle unit 50 to the deodorizing element 35 as hot air.

[Other Examples]
The deodorizing apparatus D of the present invention is configured as described above as an example, but can take the following forms within the scope of the technical idea of the present invention.
Specifically, as shown in FIG. 7, a configuration is provided in which an airflow preventing plate 59 whose upper part is bent forward or entirely inclined is provided on the upstream side of the nozzle units 502 and 503. Can do.
In the most upstream nozzle unit 501, no other nozzle unit 50 exists on the upstream side thereof, and therefore it is not necessary to provide the ventilation prevention plate 59.
When such a configuration is adopted, the rods 56a in the cylinders 561 and 562 are extended at the same speed, and when purge air is supplied from the blower 58, the air is blown out from the nozzle unit 501 and the vent hole 38 in the deodorizing element 351. The purge air that has passed through is blocked in the path by the ventilation prevention plate 59 provided in the nozzle unit 502 on the downstream side. For this reason, the purge air is dispersed in the deodorizing chamber 3, and at the same time, the dust d is separated from the purge air, falls and accumulates in the lower portion of the deodorizing chamber 3.
In this way, the ventilating plate 59 prevents the purge air that has regenerated the upstream deodorizing element 35 from reaching the downstream deodorizing element 35, so that the dust d contained in the purge air is downstream. A situation in which the deodorizing element 35 is reattached can be avoided.
Incidentally, in the enlarged view of FIG. 7, the side plate 513 is not drawn so that the form of the ventilation prevention plate 59 can be easily understood, but the side plate 513 is provided as shown in FIGS. .

  Further, the venturi mechanism 51 formed in the nozzle unit 50 is not limited as long as a part of the flow path from the front side of the nozzle tube 54 to the deodorizing element 35 side is restricted in a side view, as shown in FIG. In addition, a part of the flow path from the front to the rear is partially narrowed down so that the cross-sectional area of the flow path is once narrowed and then widened again, and the end thereof is used as the rear opening 519. To get. By adopting such a configuration, for example, the shape of the rear opening 519 can be made to correspond to the shape and arrangement of the vent holes 38 in the deodorizing element 35, and the purge air can be made to act more effectively. is there.

D Deodorizing device 1 Heating chamber 11 Burner 2 Air supply chamber 21 Air supply port 22 Duct 23 Fan 3 Deodorizing chamber 31 Entrance / exit 32 Cover plate 33 Mounting plate 34 Carriage 35 Deodorizing element 351 Deodorizing element 352 Deodorizing element 353 Deodorizing element 35a Deodorizing element Piece 35b Deodorizing element piece 35c Deodorizing element piece 36 Support base material 37 Catalyst 38 Ventilation hole 39 Frame body 39a Net body 4 Exhaust chamber 41 Exhaust port 5 (of deodorizing element) cleaning device 50 Nozzle unit 501 Nozzle unit 502 Nozzle unit 503 Nozzle Unit 51 Venturi mechanism 511 Air guide plate 512 Air guide plate 513 Side plate 514 Stud bolt 515 Nut 516 Seal plate 517 Fixing plate 518 Front opening 519 Rear opening 52 Vent pipe 53 Outlet 54 Nozzle pipe 55 Tee 55a Air inlet 56 Cylinder 561 Siri Da 562 Cylinder 563 Cylinder 56a rod 57 conduit 57a valve 58 blower 59 draft protection plate A outside air B base d dust F machine frame G0 exhaust gas G1 deodorizing exhaust

Claims (4)

A deodorizing element cleaning device provided in a deodorizing device that deoxidizes and / or decomposes organic matter in exhaust gas containing soot by a deodorizing element carrying a catalyst component to produce deodorized exhaust gas,
The deodorizing device is configured such that the upstream of the flow of exhaust gas is the front, while the downstream is the rear.
Together with said cleaning device facing surface of the deodorizing device is formed shall comprise a nozzle unit that is configured to be able to supply purge air to the entire surface of the deodorizing device by being swept,
The nozzle unit includes a nozzle tube in which a jet port is formed ,
Together leading to the rear side from the front side of the nozzle tube at the side surface view state, and are those which are equipped and a venturi mechanism for forming a flow path cross-sectional area is narrowed by partially throttled,
The purge air discharged from the nozzle tube outlet is configured to be ejected from the rear opening with the air volume increased by taking in the gas in the deodorizing chamber from the front opening of the venturi mechanism. A deodorizing element cleaning device characterized by the above.
The venturi mechanism is configured to include a pair of wind guide plates positioned opposite to each other on the top and bottom of the nozzle tube and side plates that close both side openings formed between the wind guide plates. The deodorizing element cleaning apparatus according to claim 1, wherein the deodorizing element is cleaned.
The deodorizing element cleaning device according to claim 1 or 2, wherein the venturi mechanism includes a sealing plate in contact with a surface of the deodorizing element facing the nozzle unit.
The deodorizing element comprises a plurality of groups in series,
The nozzle unit is provided with the same number of deodorizing elements,
4. The deodorizing element cleaning device according to claim 1, wherein a ventilation prevention plate is provided on the upstream side of the nozzle unit located on the downstream side .

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