JP2003259986A - Exhaust system of smokeless roaster - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem of short duration of life of activated carbon used for a deodorization box connected to a main duct of a smokeless roaster. <P>SOLUTION: Odor is absorbed in very pores on the surface of the deodorant M by filling up deodorant M which are formed from acid clay or activated clay with plaster and water mixed in so as to be hydrated and hardened and then molded into block-shape, in the deodorization box 14 of deodorization parts 5, 5a. Further, the absorbent moves in an internal consecutive air gap, and deodorizing effect can be obtained for a long time. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a smokeless roaster exhaust system for purifying grilled smoke generated by a plurality of smokeless roasters installed in a yakiniku restaurant and exhausting the smoke outdoors.

[0002]

2. Description of the Related Art Conventionally, as a smokeless roaster, an exhaust part of a roaster body is connected to a main duct for suction which is separately provided under the floor so that exhaust gas such as burning smoke is exhausted to the outside through the main duct. The concentrated duct type smokeless roaster was put into practical use, and the smoke eliminating section of the main duct was equipped with a suction fan, an electric dust collection unit, a ventilation filter, activated carbon, etc.

[0003]

The smoke eliminating section attached to the exhaust system of a smokeless roaster comprises an oil and fat adsorbing section for collecting particulate matter and a deodorizing section for collecting odors (ultrafine particles). Activated carbon was used as the. Since activated carbon has a large number of fine pores on the surface and has a large surface area, it has a high odor adsorption rate, but since the activated carbon is granular, the above-mentioned action occurs only on the surface portion. As a result, after efficient and relatively immediate adsorption on the surface, the adsorption capacity on the surface deteriorates, so it is easy to reach the saturated adsorption amount, or in terms of quantity and generally, the deodorizing ability is considered. Is small, has a short life, and activated carbon is not cheap.

[0004]

SUMMARY OF THE INVENTION In view of the problem that activated carbon has a short life, the present invention is based on the above-mentioned prior art, and a smoke eliminating section and a main fan are provided in a main duct that is assembled from a plurality of smokeless roasters and exhausted to the outside. The smoke removal section consists of an oil adsorption section and a deodorization section.The deodorization section uses a block deodorant with a core placed in the internal circulation space of the hollow cylindrical block body so that the internal circulation space faces the upstream and downstream directions. It consists of a plurality of deodorizing units, and the block body and core are made by adding gypsum and water to acid clay or activated clay to hydrate and harden it to form odors while adsorbing odors in the fine pores on the surface of the deodorant. , The adsorbed substance moves into the continuous voids inside and deodorizes for a long time.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. Fig. 1 shows a schematic plan view of an exhaust system, in which a plurality of smokeless roasters 1, 1a ... are installed in a yakiniku restaurant, a main duct 2 is arranged under the floor in the shop, and roaster ducts 2a of the smokeless roasters 1, 1a ... are installed. The tip of the main duct 2 which is connected to the main duct 2 and centrally sucks and exhausts the exhaust gas of the smokeless roasters 1, 1a, is projected to the outside, and the main fan 3 is attached to the main duct 2 which is projected to the outside.
(Central exhaust fan), oil and fat adsorbing part 4, and deodorizing parts 5 and 5a are connected to each other (the deodorizing parts 5 and 5a are connected to the main duct 2 in the outdoor part, but at any position of the main duct 2) good). Inside the deodorizing portions 5 and 5a, a deodorizing agent M (block deodorizing agent 6 and block deodorizing agent 6a) having a specific shape is installed.

The deodorant M is obtained by adding gypsum and a large amount of water to activated clay or the like, and preferably activated alumina having a high adsorbing power,
An activation accelerator such as calcium carbonate or magnesium oxide is added to the mixture, which is hydrated and hardened, and formed into a block shape, an agglomerate shape, or an agglomerate shape. The substance is a porous deodorant M of a specific material (material obtained by adding gypsum and water to acid clay or activated clay to hydrate and harden it), and has a block shape, a nodule shape, or a block shape as shown in FIGS. A large number of lump-shaped deodorants M are filled. One of the main components of the deodorizer M, montmorillonite, acidic clay (main component is montmorillonite), activated clay (white clay obtained by treating acid clay with mineral acid) or zeolite, which is an adsorbent, is inexpensive, but fine particles, Since it is a powder, the deodorant M used in the exhaust system of the smokeless roaster of the present invention is a predetermined shape (block, nodule, lump) obtained by adding gypsum and a large amount of water to activated clay etc. It is formed into a granular shape and is stored and filled in the deodorizing box 14 of the deodorizing portions 5 and 5a. As described above, gypsum and a large amount of water are added to the activated clay or the like, preferably, activated alumina having a high adsorptive power,
A porous deodorizer M, which is hydrated and hardened by adding an activation promoter such as calcium carbonate or magnesium oxide, is a large number of voids, continuous voids, air bubbles, irregular large and small spaces between activated clay particles. Communication space (hereinafter, referred to as continuous void) is formed.

The block deodorant 6 is, as shown in FIGS.
The unit structure is formed by a hollow cylindrical block main body 7 whose outer shape is a regular quadrangle, and a conical tip-shaped rear cylindrical core 8 arranged in the center of the block main body 7. The length L and the thickness H are formed to have the same size, and the block main body 7 and the core 8 are arranged with the same axis.
As shown in FIG. 4, the block main body 7 is formed into a hollow cylindrical shape by providing an internal distribution space 7a in the central portion of the block main body 7, and the inner wall surface 18 of the block main body 7 forming the internal distribution space 7a is
It is composed of a large number of circumferential surfaces 19, 19a with different radii, with the large radius circumferential surface 19 on the front end side 7b (inlet side) and the small radius circumferential surface 19z on the rear end side 7c (outlet side). ) And arranged in order of diameter difference. Therefore, the opening area of the inflow port A on the front end side 7b is large, the opening area of the outflow port B on the rear end side 7c is small, and the overall taper shape of the downstream diameter reduction is a continuous stepped shape. Circumferential surfaces 19, 19a ... Step surfaces 9, 9a ... Connecting them to each other become exhaust gas collision surfaces, and step surfaces 9, 9a ... on the front end side 7b are on the outside, and step surfaces 9z, 9y ... on the rear end side 7c are on the inside. They are arranged and differ in radial position.

The tip conical portion 8a of the core 8 is formed with stepped surfaces 10, 10a ... Which are gradually concentric with a small diameter toward the tip, and the intervals L2 between the stepped surfaces 10, 10a. At the same time, a hemispherical projection 11 is formed at the tip of the core 8. The tip conical portion 8a of the core 8 is attached to the tip side of the block body 7.
While protruding from 7b, the rear cylindrical portion 8b of the core 8 is arranged in the central portion inside the block body 7. On the other hand, the rear cylindrical portion 8b of the core 8 is provided with a constricted portion 8c and forms a raised end surface at the rear end. It should be noted that means for arranging the core 8 with the same axis in the block body 7 can be appropriately used. In the illustrated case, the central portions of the elastic metal rods 12 and 12a are bent in a V shape, and At the time of molding the core 8, the central portion is buried, both ends of the metal rods 12 and 12a are bent and elastically contacted with the inner wall surface 18 such as the circumferential surface 19a of the block body 7, The core 8 is held and arranged therein.

As shown in FIG. 2, the deodorizing unit 5 has a deodorizing unit 15 in a deodorizing box 14 having a diameter larger than that of the main duct 2.
The block deodorizing agent 6 of the deodorizing unit 15 is arranged inside the deodorizing box 14 so that the outer peripheral portions of the block main bodies 7 are in close contact with each other in a vertically and horizontally laminated manner, and as shown in FIG.
The square bar-shaped joint members 16, 16a ... Are interposed in the square-shaped gaps formed by the chamfered portions of each block body 7, and the triangular-column-shaped gap members 17 are provided in the gaps between the inner surface of the deodorization box 14 and each block body 7. , 17a ... are interposed. still,
The joint members 16, 16a ... And the chamfered portion of the block main body 7 are provided with engaging recesses and protrusions so as to engage with each other.
The total length of a is a little more than twice the length L, and as described later, a pair of front and rear block deodorants 6 facing each other with the retention space 21 in between are connected.

As described above, a plurality of deodorizing units 15 in which the respective block main bodies 7 are laminated are installed as needed. The space between the deodorizing units 15 is the conical tip 8a of the core 8.
The deodorization unit is set to a length longer than the protruding length of 2
15 are installed in multiple stages.

As shown in FIG. 2, the deodorizing section 5a installed downstream of the deodorizing section 5 filled with the block deodorizing agent 6 is made of the same material as that of the block deodorizing agent 6, and is formed into a nodular or block-shaped mass. A large number of deodorizers 6a are filled and a filter having a high-performance adsorption function is provided. Further, as shown in FIG. 1, the oil and fat adsorbing section 4 installed on the upstream side of the main fan 3 is a ventilation filter or an electrostatic precipitator.
It can be appropriately selected together with 5a, and further, the deodorizing portions 5 and 5a may be separately installed on the upstream side of the main fan 3 to form the fat and oil adsorbing portion 4.

Next, the operation of the exhaust system for the smokeless roaster according to the present invention will be described. Smokeless roaster 1, 1a
Exhaust gas generated by ... is sucked into the roaster duct 2a by the suction action of the main fan 3, and each smokeless roaster 1, 1a
The exhaust gas sucked from ... is collectively sucked into the main duct 2, and is primarily purified by a prefilter or an electric dust collector in the oil and fat adsorbing section 4 of the smoke eliminating section attached to the outdoor main duct 2, and the primary purified gas is deodorized section. It is deodorized by the block deodorant 6 of 5 and is released to the atmosphere as purified gas.

The deodorizing action when the primary purified gas containing odorous components reaches the deodorizing section 5 will be described below. The primary purified gas that has flowed into the retention space (chamber) 20 in the front stage of the deodorization box 14 in the front deodorization unit 5 reaches the deodorization unit 15 of the first stage, first group, and the individual block deodorants 6 in the deodorization unit 15 Flow-in port A (corresponding to the area obtained by subtracting the cross-sectional area of the core 8 from the opening area of the block main body 7), and at that time, the flow is induced by the conical core 8 protruding forward from the block main body 7. It flows into the inlet A. Specifically, the exhaust gas in the central portion is curvedly flowed along the surface of the tip conical portion 8a of the core 8, and a part of the primary purified gas into the inflow port A is obliquely flowed in, so that the block main body 7 is totally integrated. It flows in so as to collide with the inner wall surface 18 (near the circumferential surfaces 19, 19a, 19b) on the front end side 7b of the internal circulation space 7a, and part of the odor adheres due to the synergistic effect with the step surfaces 9, 9a ... . The primary purified gas that has flowed in from the inflow port A has a rear cylindrical portion in the front portion of the internal circulation space 7a.
A turbulent flow is generated due to the presence of the core 8 in which the outer circumference of the body of 8b is partially restricted, and it adheres to the inner wall surface 18 and the surface of the core 8, and is a step surface that is gradually positioned on the center side when flowing into the rear side. .. 9m, 9n ... 9y, 9z, the odor particles adhere to the step surfaces 9, 9a ... 9y, 9z, and the flow path of the primary purified gas changes inward.

The secondary purified gas deodorized from the primary purified gas by the block deodorant 6 of the first stage and first group is the block deodorant 6
It flows into the next retention space 21 from the rear end, and then the 1st stage 2nd
The block deodorizing agent 6 of the deodorizing unit 15 of the group is reached. In the 1st stage 2nd group, it is deodorized by the same action as in the 1st stage 1st group, and this deodorizing action is repeated even in the 2nd stage and thereafter, and the purified gas whose odor is adhered and adsorbed to the block deodorant 6 is Purified gas passing through the intermediate retention space 21 and adhering to and adhering to the massive deodorant 6a is discharged to the atmosphere through a duct.

The action of air being redirected (changed in the flow path) and attached at various places will be individually described below. The primary purified gas that has flowed into the deodorizing box 14 having a larger diameter and a larger cross-sectional area than the main duct 2 has a slower speed than the flow velocity in the main duct 2 in the retention space 20 in the preceding stage of the deodorizing box 14, and enters the deodorizing section 5. The contact time with the filled block deodorant 6 becomes longer,
It is easily adsorbed. Further, the layered block deodorant 6 in the deodorizing section 5 becomes large in size and has a large surface area, and the contact area between the particles of the primary purified gas and the block deodorant 6 is large.
Particles are easily adsorbed.

The primary purified gas in the retention space 20 first reaches the core 8, collides with the step surfaces 10, 10a provided on the core 8 and some particles adhere to the core 8, and the inflow gas at the core 8 is introduced. While being distributed, the flow is deflected along the surface of the core 8 to form an inclined flow, which merges with the primary purified gas flowing straight in front of the inlet A. Wall 18
An incline flow to the inflow. The inclined primary purified gas flowing in from the inflow port A collides with the inner wall surface 18 (mainly in the vicinity of the circumferential surfaces 19, 19a and 19b) of the tip side 7b of the block body 7,
.. are partly attached to the step surfaces 9, 9a ..., and the primary purified gas is turned inward and continues to flow. Turbulence is generated between the constricted portion 8c at the rear of the core 8 and the circumferential surfaces 19, 19a at the tip of the block body 7 and adheres to these places, and the rear end of the core 8 is steep. In this state, a low pressure region is generated, and a turbulent flow is generated also here, adhering to various places, or mixed and the distribution state of particles changes. At the rear of the middle of the internal flow space 7a of the block main body 7, the flow tends to be along the center direction of the internal flow space 7a, but the internal flow space 7a has a step at the inner peripheral position in a stepwise manner. The flow is diverted and the particles are stepped ... 9m,
The primary purified gas flows that have adhered to 9n ... 9y and 9z and have collided are diverted to an inward position and also generate turbulence to some extent.

The secondary purified gas that has flowed into the intermediate retention space 21 immediately before the first-stage second group again flows into the block deodorant 6 and repeats the same adhesion action, but the first-stage first-stage first group The central flow of the secondary purified gas (the portion having many remaining particles) flowing out of the block deodorant 6 collides with the core 8 of the second group in the subsequent stage, and the adhesion action is repeated.

Purified gas that has been deodorized by the deodorizing section 5 in the previous stage and has flowed into the deodorizing section 5a in the subsequent stage passes through the gaps between the large number of mass deodorizing agents 6a filled in the deodorizing section 5a and has a complicated and diverse flow. The particles are adsorbed by the lumped deodorant 6a by changing the path, colliding, and contacting.

The individual actions of the deodorizing action will be described below. First, as the adhesion action of the particles, the primary purified gas containing particles of the odorous component is added to each obstacle (the tip cone portion 8 of the core 8).
a, step surfaces 10, 10a ..., step surfaces 9, 9a of the block body 7
, Etc.), the particles of the odorous component contained in the primary purified gas have a larger mass than the air and have a larger inertial force than air, so the primary purified gas is diverted. However, in many cases, the particles proceed as they are due to inertial force and collide with an obstacle. Since the obstacle is formed of a specific material, the particles in the primary purified gas adhere to or are adsorbed on the wall surface, and the particles of the primary purified gas are removed by the block deodorant 6.

In the process of colliding with and in contact with a large number of block deodorants 6 filled in the deodorizing box 14 and passing between a large number of nodule-like or block-like deodorants 6a, the deodorant M
Is a fine pore similar to activated carbon that activated clay has, and a large surface area of activated clay and gypsum adsorbs odor (ultrafine particle component), and the adsorbed odor gradually moves to continuous voids inside, The adsorption action on the surface is retained.

The block deodorant 6 and the block deodorant 6a having a reduced deodorizing ability are taken out from the deodorizing unit 15 and sprayed with water to activate and regenerate the block deodorant 6 and the block deodorant 6a. It can be filled and reused.

[0022]

In summary, the present invention has the smoke eliminating section and the main fan 3 attached to the main duct 2 which collects a plurality of smokeless roasters 1, 1a ... And exhausts them to the outside. Therefore, the smokeless roasters 1, 1a. The exhaust gas can be exhausted outdoors, and since the smoke eliminating section is composed of the oil and fat adsorbing section 4 and the deodorizing section 5, the oil and fat content and odor can be removed from the sucked exhaust gas. Since the deodorizing unit 5 is a deodorizing unit 15 in which a plurality of block deodorizing agents 6 having cores 8 are arranged in the internal flow space 7a of the hollow cylindrical block body 7, the core 8 is used to generate the primary purified gas flow. Dirty odor particles are diverted into the inner surface of the inner space 7a
The particles can be efficiently adhered by colliding with 19, 19a, ... And the odor of the primary purified gas can be removed. Further, the block body 7 and the core 8 are formed by adding gypsum and water to montmorillonite, acid clay, activated clay or zeolite, followed by hydration hardening to form odors by the fine pores on the surface of the block deodorant 6. At the same time, the adsorption function of the surface is maintained by the internal migration function of the continuous voids inside the block deodorant 6.
The block deodorant 6 can be used for a long period of time. Further, the main component of the block deodorant 6 (deodorant M) can be reduced in cost by using inexpensive activated clay, and the block deodorant 6 can be activated, regenerated, refilled and reused. By adopting the deodorizing parts 5 and 5a in the oil and fat adsorbing part 4, it is possible to eliminate the need for an expensive electrostatic precipitator and reduce the cost.

Since at least one of activated alumina, calcium carbonate and magnesium oxide is added and mixed as an additive and the mixture is hydrated and hardened and molded, the activity of the deodorant M (block deodorant 6, block deodorant 6a), etc. The action can be enhanced and the adsorption action can be improved.

Since the main duct 2 is provided with a deodorizing box 14 having a diameter larger than that of the main duct 2, and the block deodorizing agent 6 is disposed in the deodorizing box 14, the flow speed becomes slow,
The block deodorant 6 can efficiently remove particles contained in the exhaust gas.

Since the tip conical portion 8a of the core 8 is projected from the tip side 7b of the block body 7, the primary purified gas induced by the tip conical portion 8a collides with the tip side 7b of the block body 7. As a result, the tip side 7b can be effectively functioned, so that the entire length of the internal circulation space 7a can be effectively used and the block deodorant 6 can be made compact.

The block body 7 forming the internal distribution space 7a
The inner wall surface 18 of the is a large number of circumferential surfaces 19 with different radii,
19a, and a large radius circumferential surface 19, 19a ... is provided on the tip side 7b of the block body 7, and a small radius circumferential surface 19,
Since 19a ... Is formed on the rear end side 7c of the block body 7, the step surfaces 9, 9a ... 9 are formed at the same position on the inner wall surface 18 of the internal circulation space 7a.
Since there is no y or 9z, the primary purified gas can collide not only with the outer portion of the internal circulation space 7a but also the primary purified gas on the central portion side with the step surfaces 9, 9a ... The entire inner wall surface 18 of the block body 7 can be effectively operated. Further, since the inner wall surface 18 has a flat circumferential surface, the work of removing the particles adhering to the circumferential surfaces 19, 19a ... Can be performed quickly and easily.

Since the tip conical portion 8a of the core 8 is provided with the step surfaces 10, 10a ... Having a small diameter toward the tip side, the particles contained in the primary purified gas which are deflected by the step surfaces 10, 10a. While colliding with the step surfaces 10, 10a by force, the step surfaces 10, 10a ...
Can be attached to various places.

Since the rear cylindrical portion 8b of the core 8 is arranged in the block main body 7 and the constricted portion 8c is provided in the rear cylindrical portion 8b, the constricted portion 8c and the inner wall surface 18 at the tip of the block main body 7 are provided. A turbulent flow can be generated so that particles can be efficiently adhered even on the rear end side 7c, and the rear end surface of the rear cylindrical portion 8b rises to form a low pressure region, and the flow of the primary purified gas is totally Turbulent,
The adhesion efficiency can be improved.

Since the deodorizing parts 5 and 5a are composed of two stages, and in addition to the block deodorizing agent 6 described above, a large number of block deodorizing agents 6a formed in the same material in the form of agglomerates or granules are filled. Most of the particles contained in the purified gas can be removed, and a small amount of residual particles can be reliably removed with the massive deodorant 6a on the downstream side and released into the atmosphere as purified gas, which is a great practical effect. .

[Brief description of drawings]

FIG. 1 is a schematic plan view of an exhaust system for a smokeless roaster according to the present invention.

FIG. 2 is a partially omitted perspective view of a deodorizing box.

FIG. 3 is a perspective view of a first-stage deodorizing unit.

FIG. 4 is a sectional view of the block deodorant taken along the line AA.

FIG. 5 is a front view of a block deodorant.

FIG. 6 (a) is a side view of the bulk deodorant, and FIG.
FIG. 3 is a perspective view of a block deodorant.

[Explanation of symbols]

1, 1a ... Smokeless roaster 2 main duct 3 main fans 4 Fat adsorption part 5, 5a Deodorizing part 6 block deodorant 6a Bulk deodorant 7 block body 7a Internal distribution space 7b Tip side 7c rear end side 8 core 8a Tip cone 8b Rear cylindrical part 8c constriction section 9, 9a ... Step surface … 9m, 9n… Step surface … 9y, 9z stepped surface 10, 10a… Step surface 14 deodorization box 15 Deodorizing unit 18 inner wall 19, 19a… Circumferential surface M deodorant

Front page continuation (51) Int.Cl. ⁷ Identification code FI theme code (reference) F24C 15/20 F term (reference) 4B040 AC02 AE13 NA06 NA13 NA16 NA20 4D002 AB02 AC10 BA04 CA07 DA05 DA06 DA11 DA16 DA45 DA47 EA01 EA02 4G066 AA16D AA17C AA17D AA20D AA47C AA61B AA63B AA64B BA01 BA09 CA02 DA02 FA03 FA25

Claims (8)

[Claims] 1. A smoke eliminating part and a main fan are attached to a main duct which collects a plurality of smokeless roasters and exhausts to the outdoors. The smoke eliminating part comprises an oil and fat adsorbing part and a deodorizing part, and the deodorizing part has a hollow cylindrical shape. It is a deodorizing unit with a plurality of block deodorants with cores arranged in the internal circulation space of the block body, and the block body and core are montmorillonite,
An exhaust system for a smokeless roaster, characterized by being formed by adding gypsum and water to acid clay, activated clay or zeolite to effect hydration hardening. 2. The exhaust system for a smokeless roaster according to claim 1, wherein one or more kinds of activated alumina, calcium carbonate and magnesium oxide are added and mixed as an additive, and the mixture is molded by hydration hardening. 3. The smokeless roaster exhaust system according to claim 1, wherein the main duct is provided with a deodorizing box having a diameter larger than that of the main duct, and the block deodorizing agent is arranged in the deodorizing box. 4. The tip conical portion of the core is made to project from the tip side of the block body.
Exhaust system for smokeless roaster as described. 5. The inner wall surface of the block main body forming the internal flow space is composed of a large number of circumferential surfaces having different radii. The circumferential surface having a large radius is provided on the tip side of the block body, and the radius is small. The exhaust system for a smokeless roaster according to claim 1, 2, 3, or 4, wherein the circumferential surface of the block body is provided on the rear end side of the block body. 6. A stepped surface having a small diameter toward the tip side is provided at the tip conical portion of the core.
Or, the exhaust system of the smokeless roaster described in 5. 7. The smokeless roaster according to claim 1, wherein the rear cylindrical portion of the core is arranged in the block main body, and the rear cylindrical portion is provided with a constricted portion. Exhaust system. 8. The deodorizing section comprises two stages.
An exhaust system for a smokeless roaster, characterized in that, in addition to the block deodorant described in 2, 3, 4, 5, 6 or 7, a large number of block deodorants formed in the same material as a nodule or a granule are filled.