Extract and cleaning of contaminated air in commercial kitchens : Ultraviolet technology
Alexandrova, Alevtina (2009)
Alexandrova, Alevtina
Mikkelin ammattikorkeakoulu
2009
All rights reserved
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:amk-201001181323
https://urn.fi/URN:NBN:fi:amk-201001181323
Tiivistelmä
The subject of the project was a research about cleaning of contaminated air in commercial kitchens. Kitchen hoods must be cleaned from heat, moisture, smoke, and vaporized grease all the time. Accumulations of grease on kitchen equipment can easily be the reason of fire.
The thesis presents literature review of various sources like books, reports, and Internet articles. Most of the articles and tests were maid by research institutes or big manufacture companies connected with ventilation equipment. Grease destroying ultraviolet technology is rather new for HVAC market. It is provided by some European companies like Halton or Purified Air. Materials from Halton company were used for my thesis work.
First step to avoid problems of commercial kitchens is use of powerful hoods in combination with various filters. Single stage filters are rather cheap, useful in work and cleaning and are able to prevent fire. Nevertheless they are not very effective in collecting of contaminants. Multi-stage filters are the next step of grease removal. Usually the aim of first filter is to collect large particles and next filters do more delicate work. There are several technologies used in multi-stage filters. My task was to explore information about Ultraviolet Treatment
UV oxidation process consists of two primary chemical reactions. The process when UV rays hit molecular chains and breaks them into smaller compounds is called Photolysis. Then grease and vapour are oxidized by ozone and hydroxyl radicals. This process of oxidation is called Ozonolysis. All parts of UV system should be covered or has special protective equipment to avoid of irradiation of people in the kitchen by ultraviolet light.
Use of ultraviolet light in exhaust air filtering is very efficient and convenient in many ways. It destroys grease in molecular level so systems don’t need to be cleaned a lot.
The thesis presents literature review of various sources like books, reports, and Internet articles. Most of the articles and tests were maid by research institutes or big manufacture companies connected with ventilation equipment. Grease destroying ultraviolet technology is rather new for HVAC market. It is provided by some European companies like Halton or Purified Air. Materials from Halton company were used for my thesis work.
First step to avoid problems of commercial kitchens is use of powerful hoods in combination with various filters. Single stage filters are rather cheap, useful in work and cleaning and are able to prevent fire. Nevertheless they are not very effective in collecting of contaminants. Multi-stage filters are the next step of grease removal. Usually the aim of first filter is to collect large particles and next filters do more delicate work. There are several technologies used in multi-stage filters. My task was to explore information about Ultraviolet Treatment
UV oxidation process consists of two primary chemical reactions. The process when UV rays hit molecular chains and breaks them into smaller compounds is called Photolysis. Then grease and vapour are oxidized by ozone and hydroxyl radicals. This process of oxidation is called Ozonolysis. All parts of UV system should be covered or has special protective equipment to avoid of irradiation of people in the kitchen by ultraviolet light.
Use of ultraviolet light in exhaust air filtering is very efficient and convenient in many ways. It destroys grease in molecular level so systems don’t need to be cleaned a lot.