Gas separation: apparatus – With means using liquid to clean separating apparatus – Movable separating media
Patent
1999-01-21
2000-12-19
Smith, Duane S.
Gas separation: apparatus
With means using liquid to clean separating apparatus
Movable separating media
95281, 96288, B01D 4604
Patent
active
061622869
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to an exhaust cleaning system using a filter for clarifying and discharging an exhaust air containing contaminants generated from a restaurant, a home kitchen, combustion facilities, crushing facilities, etc..
BACKGROUND ART
Conventionally, as exhaust cleaning systems using filters for clarifying and discharging exhaust air containing oily steam and dust generated from the kitchens used at food supply facilities of hotels, restaurants, Tempura restaurants and Yakitori restaurants and home ventilation fans, and exhaust air containing contaminants generated from incineration facilities at waste incineration plants, crushing facilities of quarries and clinker calcination facilities of cement plants, various compositions are known. With regard to exhaust cleaning systems provided at kitchens, for example, compositions shown in FIGS. 20 and 21 are known.
A kitchen systems shown in FIGS. 20 and 21 employs a composition that an exhaust cleaning system 205 having a filter 204, such as a grease filter or a grease separator, for separating and removing tarry matters containing oil/grease and dust from an exhaust air 203 is arranged in a bellmouth-shaped hood 202 expanding downward that is connected to an exhaust duct 201, which is connected to the outdoors and stores a fan, and is arranged in a ceiling.
The filter 204 is, as provided by the Fire Service Law and various technical standards, formed with a stainless steel sheet, or a noncombustible material having a heat resistance and a corrosion resistance equal to or higher than those of the stainless steel sheet. In addition, the filter 204 is, as shown in FIG. 22 through 25, formed as a louver structure which a rapid directional conversion and contraction in air flow that occur when the exhaust air 203 flows through. And by a rapid directional conversion and contraction in air flow an oil/grease content in the exhaust air 203 touches a wall surface and an oil content exceeding a prescribed quantity is removed. Further, the filter 204 is arranged with a formation facilitating mounting/dismounting so that a deposited oil/grease can easily be washed off by separation. Underneath the filter 204, a trough 207 for collecting an oil/grease that flows through along an inner wall surface provided around a bottom part of the hood 202, and a trough 208 for collecting a prescribed quantity or more of the separated oil/grease and removing the same outside the hood 202 are provided. Additionally, the exhaust cleaning system 205 is arranged in the hood 202 such that a plain of the filter 204 is approximately 45 degrees tilted in conjunction with a horizontal plain so as to surely collect an oil/grease without causing dropping to a combustion system 210 and a fire source 211 in a kitchen.
Meantime, in the case of the exhaust cleaning system 205 having the filter 204 with the louver structure as shown in FIG. 22 through 25, an oil/grease content in the exhaust air 203, when it exceeds the prescribed quantity, flows out and is collected by troughs 207 and 208 arranged at the lower part. However, in the case of the filter 204 with the louver structure, when the exhaust air 203 contains a tar matter containing dust, the oil/grease content becomes stagnant due to an increase in viscosity, causing a decrease in flowability of the exhaust air 203 and in separation/removal efficiency. Also, as a noise, such as an air sound, is generated, a cleaning operation of the filter 204 using an alkali detergent must be done frequently particularly in an environment containing a lot of oil/grease. Further, an oil/grease content that is not removed and flows through the filter 204 deposits to an inner wall surface of the exhaust duct 201, degrading its exhaustibility, and the oil/grease deposited to the inner wall surface of the exhaust duct 201 adheres in a tar form due to a deposit of dust. Moreover, since this tar formed oil/grease requires a troublesome removal operation and involves a danger of ignition when it is oxidized, a troublesome cleanin
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Hasama Emiko
Hasama Norito
Kabushiki Kaisha Toteku Japan
LaPointe Dennis G.
Smith Duane S.
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