DE19740053A1 - Reactor for removing unpleasant smells and germs from (in)organic gases - Google Patents

Abstract

A reactor removes the unpleasant smells and germs present in organic and/or inorganic gases. The gases are passed through tubes in which they are brought into contact with ozone generating or ozone-free ultra violet light (UV) lamps (172-280 nm) and a catalyst (preferably titanium dioxide, especially in anatase modification, or TiO2 with silica gel). The gas passes at a uniform rate past the UV-source. Incoming gas first passes through a filter removing solid particles to prevent particle deposit on the UV-lamp surface. Liquid drops and/or aerosol droplets are collected by a separator/demister at the inlet.

Description

Reactor for odor and germ reduction using UV catalyst technology is delivered to companies where pre-used, recyclable materials are delivered, temporarily stored or sorted as well as at production sites in which gases organic composition are used. Furthermore, the Reactor used in companies / food industry, the aseptic supply air as Need production air. At recycling companies or companies in which Odor substances of organic composition are emitted, the reactor for air and / or exhaust air purification of organic and inorganic Odorants as well as to kill viruses, fungi and microorganisms used.

In factory farming, the reactor can also be used for exhaust air purification and Combating the microorganisms occurring in animal husbandry become.

This means that the reactor for both the supply air treatment to aseptic as well as generating odorless air, as well as for exhaust air purification to gases organic and / or inorganic composition as well as microbially contaminated Treat exhaust air, can be used on an industrial scale.

The air to be cleaned is sucked in by a suction fan and the UV reactor supplied. There are UV radiation sources in the reactor special wavelength as well as a catalyst in the interior of the reactor is appropriate. The process of odor reduction depends on the Reactor size or residence time of the gas in the reactor, the number of UV radiation sources, the reaction surface to which the catalyst is attached and the organic composition of the odor-intensive, germ-laden gas.

To an intensive interaction between the odor components, the UV To achieve radiation and the catalyst (titanium dioxide, anatase modification), a reasonable dwell time is necessary, which is due to deflection and / or Perforated sheets is achieved.

The following basic reactions occur in the reaction space:  

Water (moist air) forms under the influence of UV in conjunction with Titanium dioxide hydroxyl radicals.

Hydroxyl radicals have a large oxidation potential and oxidize them most odorants.

Some C-H compounds form radicals under the action of UV, which in turn continue to react with the oxygen from the air and thus the smell component is destroyed.

The advantage is that the catalyst activated by the UV light (titanium dioxide TiO ₂ ) forms with the water from the air hydroxyl radicals, which have an oxidizing effect on the odor components (organic composition). This creates odorless components.

The microorganisms are killed under the action of UV light or deactivated. The radiation from the UV tubes lies in the wavelength range between 172-280 nm and corresponds to the absorption wavelength of the deoxyribo nucleic acid, the building block that the genetic information of the Microorganism cell contains. High energy through absorption In light, the DNA molecules are put into an excited state, whereby the absorbed energy is sufficient to damage the cell so much that it dies or is inactivated.

After the air has been led through the reactor, it is as far from Odor emitters and microorganisms exempted them without further Aftertreatment can be derived into the atmosphere.

In order to protect the reactor interior from dust particles and aerosols, is on Placed a particle or aerosol filter. Because dust deposits on reduce the power of the UV radiation sources or the catalytic converter.  

The advantage of this UV technology is the low pressure drop in the reactor, the catalyst supported oxidation of the odor components, the apparatus identically constructed and inexpensive reactor as well as in the low Energy consumption of the UV radiation sources used.

Furthermore, there are no residues to be disposed of.

Claims (5)

1. Reactor for odor and germ reduction of organic and inorganic gases, characterized in that the gas to be treated is brought into contact with ozone-generating and / or ozone-free UV tubes of the wavelength 172-280 nm and a catalyst in this reactor. 2. Reactor according to claim 1, characterized in that the treating gas evenly directed around the UV radiation sources and is brought into contact with the catalyst. 3. Reactor according to claim 2, characterized in that solid particles separated at the reactor inlet using a dust filter to protect the UV tubes from contamination. 4. Reactor according to one of claims 1 to 3, characterized in that that liquid droplets / aerosols at the reactor inlet by means of a Droplet separators / demisters are separated. 5. Reactor according to one or more claims 1 to 4, characterized ge indicates that for the rapid oxidation of the odor components a UV activated catalyst, preferably titanium dioxide (preferred wise anatase modification) and / or titanium dioxide and silica gel is used.