JP2010022785A - Deodorizing filter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve such a problem that a whole deodorizing filter has to be exchanged when through-holes are clogged by the adhesion of oil and dust, etc., to a gas inflow port using a honeycomb filter, etc., because of temporal change when the deodorizing filter of a self-regeneration type by a catalytic function is used, so as to remove an odor substance containing oil from a kitchen or a food-processing factory. <P>SOLUTION: The deodorizing filter with a honeycomb structure, which is obtained by adding an ultrafine nanoparticle shaped metallic catalyst with an oil dissolving function and a deodorizing function to an inorganic powder raw material composed of a high-specific surface area ceramic material, a pore former, an organic binder, moisture, and a lubricant, is made to be a pre-layer with the length of around 30 mm and to be arranged by adhesion on the front part of the deodorizing filter with the honeycomb structure. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a self-regenerating deodorizing filter that is effective for removing odorous substances containing oil from kitchens and food processing plants. In particular, the present invention can be used as a maintenance pre-layer by being combined with the front of the deodorizing filter. The present invention relates to a deodorizing filter.

  Conventionally, an adsorption deodorization method using an adsorption action to remove odorous substances containing oil from kitchens and food processing plants is known. And generally used adsorption deodorization method is activated carbon, but if it is used for a certain period of time, the effect after that will be remarkably reduced and it will become impossible to deodorize substantially, so there is a problem that activated carbon must be replaced every certain period. there were.

  In order to solve this problem, a binder and water are kneaded into a powder raw material made of ceramics and a catalyst having a deodorizing and decomposing function such as titanium oxide, manganese oxide, copper oxide, or silver compound, and an extruder. Known as a deodorizing filter by forming a honeycomb structure having a plurality of through-holes partitioned by porous partition walls, or by adding a binder and water to a powder material made of ceramics and kneading, extrusion molding A catalyst layer having an adsorption function composed of titanium oxide, manganese oxide, copper oxide, silver compound, and a binder component is adhered to a honeycomb structure having a plurality of through holes partitioned by porous partition walls by a machine. Deodorizing filters have been developed and recently used as self-regenerating deodorizing filters. It has come to so that.

  However, because these catalysts must use metal catalysts for manufacturing and performance, the conventional technology uses a large amount of large particles, which increases the price and performance. The reaction specific surface area was small and the contact with odor gas was weak, so the deodorizing effect was not sufficient.

  In addition, the decomposition of odor components and oil from kitchens and food processing plants is slow, resulting in failure to obtain the effects of oil decomposition and deodorization. In addition, if the pores of the honeycomb structure are blocked with oil, there has been a problem that the reaction between the odor gas and the catalyst becomes impossible.

Problems to be solved by the invention

  Therefore, the present invention solves these problems, and the first object of the present invention is to achieve high collection efficiency even for odorous gas containing oil components generated from kitchens and food processing plants, while pressure is high. An object of the present invention is to provide a deodorizing filter with a small loss and a long life.

  It is an object of the present invention to be used as a maintenance pre-layer that can easily exchange dust and oil components adhering to the inlet inflow portion.

  Next, the object of the present invention is to quickly decompose the odor components and oil adhering to the pores of the honeycomb structure with a metal catalyst so that contact with the odor gas and gas decomposition can be maintained with the surface of the pores always in a novel state. It is a thing.

  Also, since it has a self-regenerative function that decomposes the gas component containing oil with a metal catalyst, let's provide a semi-permanent use with an odor containing oil and an excellent deodorizing function. It is what.

  Furthermore, the object of the present invention is to enable the effective removal of malodor mixed with various odors.

Means for solving the problem

  The present invention is intended to solve the above-mentioned problems, and the first solution of the present invention is an inorganic powder raw material, a pore forming agent, and an organic binder made of ceramics having a high specific surface area with 1 to 100 pores. In addition, an ultra-fine nanoparticulate metal catalyst with oil decomposing and deodorizing functions is added to the water and lubricant, and the kneaded material is fired to form a honeycomb shape for the purpose of expanding the reaction area with the oil and gas. The deodorizing filter formed in the above is provided as a maintenance pre-layer and is combined with the outer dimension of a depth of 5 to 50 mm at the front part of the ceramic honeycomb deodorizing filter.

  The deodorizing filter is characterized in that the deodorizing filter is formed with outer dimensions of an airflow inlet portion of 50 to 300 mm, a depth of 30 to 500 mm, and a through hole of 2 to 10 mm.

  The inorganic powder raw material made of ceramics having a high specific surface area includes silicon oxide, calcium oxide, alumina, potassium oxide, boron carbide, titanium carbide, silicon nitride, boron nitride, kaolin, talc, silica, and quartz. The thing which uses at least 1 type chosen from these as a main raw material can be mentioned. Of these, silicon oxide, zeolite, or sepiolite is the main component from the viewpoint of thermal conductivity and heat resistance.

  Examples of the pore forming material include synthetic resins such as walnut powder, wheat flour, wood flour, cotton flour, polyethylene, or polypropylene. These pore-forming materials are combustible powders, and are substantially burned away in the firing process, so that macropores can be artificially formed in the honeycomb structure. As the particle size of the pore formation used, a final product having macropores of 1 to 500 μm is used. For example, a honeycomb structure having a macropore of 1 to 500 μm can be manufactured by using pore formation such as walnut powder having a particle size of 1 to 500 μm.

As the metal catalyst, zinc having an average particle diameter of 3 to 50 nm or titanium oxide having an average particle diameter of 0.05 to 100 μm is preferable, but in addition, aluminum, manganese, silver, magnesium, iron oxide, and the like in the form of ultrafine nanoparticles Can be mentioned.
The component ratio of the raw material is 1 to 30% in the case of zinc having an average particle diameter of 3 to 50 nm, or. 1-30% is preferable.

  The organic binder connects inorganic powder raw materials made of ceramics, and hydroxymethyl cellulose, methyl cellulose, hydroxyethyl cellulose, polyvinyl alcohol, or the like can be used. These organic binders can be used alone or in combination of two or more.

The amount of water to be added is usually about 20 to 50 parts by weight with respect to 100 parts by weight of the powder raw material described above, and the mixed raw material obtained after adding water is kneaded with a vacuum kneader or the like to make plastic.

  The molding method is preferably extrusion molding, and can be performed using, for example, a twin screw type continuous extrusion molding machine.

  Examples of the method for drying the honeycomb structure include an electric heater type dryer and a gas burner type dryer.

Next, the manufacturing method of a deodorizing filter is described.
First, an inorganic powder raw material made of ceramics, a pore forming agent, an organic binder, moisture, a lubricant, and an ultrafine nanoparticle zinc having an average particle diameter of 10 to 20 nm having an oil decomposition function and a deodorizing function were added. The material is kneaded with a kneader to obtain a plastic kneaded product.

  Next, the kneaded product is supplied to a hopper of a twin-screw continuous extrusion molding machine, and extruded from a molding die as a honeycomb structure having a rectangular cubic body appearance.

The honeycomb structure formed into a honeycomb shape is dried in an electric heater type drying furnace. At this time, since the honeycomb structure contains a large amount of moisture, if the honeycomb structure is directly put into a furnace having a firing temperature of 450 ° C. or higher, the honeycomb structure is cracked or deformed due to water expansion accompanying a rapid temperature rise. May occur. For this reason, it is desirable to perform drying to remove moisture relatively gently before firing.
Further, when the firing temperature of the honeycomb structure is set to 400 to 800 ° C., the pore forming agent is burned out, and thus pores having a size of 0.01 to 500 μm are formed in the entire partition walls of the honeycomb structure.

  And the honeycomb structure which formed the pore surface made of nanoparticulate zinc with an ultrafine average particle diameter of 10 to 20 mm having an oil decomposition function and a deodorizing function has an airflow inlet portion of 50 to 300 mm and a depth of 30 to 500 mm. A deodorizing filter was obtained by cutting into outer dimensions.

  In addition, the honeycomb structure is cut to a depth of 5 to 50 mm, and is combined with the front portion of the deodorizing filter of the present invention or the conventional ceramic honeycomb deodorizing filter so that dust and oil can be easily exchanged. It can be used as a maintenance pre-layer.

  Next, the operation of the above problem solving means is as follows. That is, the partition wall of the honeycomb structure constituting the deodorizing filter is formed with a pore surface containing nano-sized zinc having an ultrafine average particle diameter of 10 to 20 mm having an oil decomposition function and a deodorizing function. Odor gas containing oil generated from the kitchen inhaled in contact with the particulate zinc on the pore surface and becomes odorless or low odor component air and flows out of the deodorizing filter. On the other hand, the viscous oil component adheres to the pore surface, but the particulate zinc has a catalytic function, so it can be quickly decomposed and the surface of the pore can always be kept novel.

The invention's effect

As described above, the deodorizing filter of the present invention has the following effects.
(1) Since a honeycomb structure is obtained by kneading together an inorganic powder raw material made of ceramics with a metal catalyst having an oil decomposition function and a deodorizing function, that is, nanoparticulate zinc having an ultrafine average particle diameter of 10 to 20 nm. Good gas contact and reaction rate, and high efficiency gas removal and oil decomposition performance.
(2) Since the pore-forming material is kneaded together with an inorganic powder raw material made of, for example, 1 to 1000 porous ceramics to form a honeycomb structure, a large number of bubbles can be formed and a high specific surface area can be obtained. As a result, odorous gas or the like is adsorbed in the pores, reacted with the metal catalyst in the pores, converted into odorless components, and released as odorless air such as low hydrocarbon gas.
(3) The oil content in the gas adheres to the pores but is decomposed by the metal catalyst, so that the surface of the pores is always maintained in a novel adsorption function state.
(4) Since the honeycomb structure forms a continuous passage without obstructing the gas flow, the ventilation resistance is low, leading to an energy saving effect such as fan power.
(5) Since the honeycomb structure itself has many bubbles, the specific gravity is light and the handling is easy.
(6) The number of deodorizing filters may be selected according to the concentration of odorous gas generated from kitchen facilities and food processing plants, and deodorizing measures are simple.

  Hereinafter, the deodorizing filter of the present invention will be described with reference to FIG.

In the figure, reference numeral 1 denotes a deodorizing filter, which is formed from a honeycomb structure 2 having a square shape of about 50 to 300 mm and a length of about 30 to 500 mm. Reference numeral 3 denotes a partition wall having a thickness of 1 mm or less, and a through hole 4 is formed by the partition wall 3. Further, the wall of the partition wall 3 is formed with 1 to 500 μm pores and 1 to 1000 micron pores. 5 is a pre-layer.

  100 parts by weight of sepiolite (ceramic powder raw material), 10 parts by weight of nanoparticulate zinc (metal catalyst) having an average particle diameter of 10 to 20 nm, 5 parts of polypropylene (pore forming agent), 8 parts by weight of hydroxymethylcellulose (organic binder) and polyvinyl alcohol 2 parts by weight of (organic binder), 4 parts by weight of surfactant (lubricant) and 80 parts by weight of water are kneaded with a kneader kneader.

  The raw material kneaded material is introduced into a hopper of an extrusion molding apparatus. The introduced raw material kneaded material is extruded downstream from the exit die by an extrusion screw. The extruded molded body is cut into external dimensions of 50 to 300 mm in the airflow by a cutting device and 30 to 500 mm in depth, conveyed by a conveyor, and sent to a receiving pallet. Thereafter, the molded body was dried in a drying chamber, and further fired in a firing furnace to obtain the deodorizing filter of the present invention.

  120 parts by weight of sepiolite (ceramic powder raw material), 20 parts by weight of titanium oxide (metal catalyst) having an average particle size of 0.05 to 100 μm, 12 parts of nanoparticulate zinc (metal catalyst) having an average particle size of 10 to 20 nm, and polyethylene (pores) 7 parts of a forming agent), 6 parts by weight of methylcellulose (organic binder), 3 parts by weight of polyvinyl alcohol (organic binder), 6 parts by weight of dextrin (lubricant) and 90 parts by weight of water are kneaded in a kneader kneader.

  The raw material kneaded material is introduced into a hopper of an extrusion molding apparatus. The introduced raw material kneaded material is extruded downstream from the exit die by an extrusion screw. The extruded body is made into a 50 to 300 mm airflow inlet portion and a depth of 5 to 50 mm by a cutting device, conveyed by a conveyor, and sent to a receiving pallet. Thereafter, the molded body was dried in a drying chamber, and further baked in a baking furnace to obtain the deodorizing filter of the present invention which can be used as a maintenance pre-layer for adhering dust and oil.

  In this embodiment, one embodiment of the present invention is described. The present invention is not limited to this embodiment, and the gist of the present invention is not changed at all by various changes.

The present invention has a high-performance odor removal with a deodorizing filter for odor gas containing oil generated from the kitchen, and has improved the deodorizing function that is reduced by the adhesion of oil conventionally, using a special metal catalyst as a raw material. By including and molding, the attached oil content is decomposed so that the deodorized surface can always be self-regenerated to a novel state, which is extremely large in practical use.

The perspective view of the deodorizing filter of the present invention is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Deodorizing filter 2 ... Honeycomb structure 3 ... Partition 4 ... Through-hole 5 ... Pre-layer

Claims (6)

  A deodorization filter comprising a ceramic honeycomb-shaped deodorization filter united in a front dimension of 5 to 50 mm in depth as a maintenance pre-layer for adhering dust and oil.   A ceramic kneaded product containing inorganic powder raw material, pore former, organic binder, moisture, lubricant, and ultra-fine nanoparticulate metal catalyst with oil decomposing function was fired and formed into a honeycomb shape. The deodorizing filter according to claim 1, wherein The deodorizing filter according to claim 2, wherein the inorganic powder material made of ceramic is a sepiolite powder material or zeolite having a surface area of 100 to 500 m ² / g.   The ultrafine average particle size nanoparticulate metal catalyst having an oil decomposition function and a deodorization function is zinc having an average particle size of 3 to 50 nm or titanium oxide having an average particle size of 0.05 to 100 μm. Item 3. The deodorizing filter according to Item 2.   3. Zinc having an average particle diameter of 3 to 50 nm is contained in a range of 1 to 30%, or titanium oxide having an average particle diameter of 0.05 to 100 μm is contained in an amount of 0.1 to 30%. Deodorizing filter as described.   The mixture of inorganic powder material made of ceramics, pore forming agent, organic binder, moisture, lubricant, and ultrafine nanoparticulate metal catalyst with oil decomposing function is baked, and the airflow inlet is 50 A deodorizing filter formed into a honeycomb shape with outer dimensions of ˜300 mm, a depth of 30 to 500 mm, and a through hole of 2 to 10 mm.

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