DE19836519A1 - Reactor for the removal of odors using UV radiation together with catalysts - Google Patents

Abstract

Air is drawn in at the base of the reactor through a filter and then around low intensity UV sources (5). These sources are surrounded by mirrors (6) and separated by catalysts (4). The catalysts consist of titanium dioxide and produce hydroxyl radicals, with a high oxidation potential, under the action of the radiation. Further oxidation of the odiferous carbohydrate radicals and reduction of any ozone present takes place over high intensity UV sources (3) and catalyst (2). The source (3) has a wavelength of 172-380 nm and, together with the heat released by the oxidation, provides heat for catalyst (2). An additional heater could be integrated in the catalyst.

Description

Reactor for odor reduction and removal of pollutants from gases takes place Application in the chemical, pharmaceutical industry and in companies in which gases of organic composition are emitted. Another area of application are recycling companies and recycling plants as well as processing plants of biological resources, the odor-intensive, harmful emit polluted gases.

The reactor is used to purify the organic or inorganic waste air Odor and pollutants used.

The air to be cleaned is sucked in by a suction fan and the Reactor supplied.

In the gas cleaning device there is UV low pressure in the lower part of the reactor emitters of the wavelength of 180-280 nm and / or a UV-active catalyst used.

Some hydrocarbon compounds form through direct UV radiation Radicals that react with atmospheric oxygen and are therefore low in pollutants Components are oxidized. The UV light active catalyst, preferably Titanium dioxide, forms hydroxyl radicals. Have the resulting hydroxyl radicals high oxidation potential and oxidize most hydrocarbons, d. H. carbon dioxide and water are generated. Another oxidation of pollutants occurs through ozone, which is with the help of UV light and that in the gas Oxygen is formed.  

The partially or completely decomposed pollutants reach the top Reactor part to the UV medium pressure or UV high pressure lamp. These spotlights types emit UV light with a wavelength of 170-400 nm.

This high-energy UV light also destroys pollutants in which the Hydrocarbon compounds disintegrate with energy consumption and with the Oxygen or ozone react to carbon dioxide and water.

Oxidation catalysts, preferably iron oxide catalysts and / or mixed with a platinum-supported oxidation catalyst are in the end part of the reactor Residual destruction of ozone and the oxidation of some Hydrocarbon compounds arranged.

The advantage of the installed directly below the oxidation catalyst high-energy UV medium-pressure lamp, is the use of the released heat this spotlight. The heated catalyst gets its working temperature. The heat released during the oxidation causes the catalytic converter to return to its original state brought and maintained optimal working temperature.

In this last stage, the remaining pollutants become carbon dioxide and Water oxidizes, ozone is broken down into oxygen. Depending on the operating conditions, Composition and concentration of pollutants can in the oxidation a heating coil can also be arranged at the catalyst level for temperature control.

The advantage of the multi-stage UV catalyst technology lies in the compact, ready-to-connect reactor container construction, using the various types of oxidation of the hydrocarbons and the use of the heat input and generated by exothermic reactions. Furthermore, there is no residual product
This air cleaning system enables simple, economical cleaning of organically or inorganically polluted air.

Claims (10)

1. Reactor for odor reduction of organic and / or inorganic gases and degradation of organic components, characterized in that in the reactor ( 1 ) ozone-free and / or ozone-generating UV low-pressure lamps ( 5 ) and / or high-energy UV medium-pressure lamps ( 3 ) preferably with the Wavelength 172-380 nm, special mirrors ( 6 ) and / or UV-active catalysts ( 4 ) and contact and / or oxidation catalysts ( 2 ) are arranged. 2. Reactor according to claim 1, characterized in that in the Air purification system a fan is integrated. 3. Reactor according to claim 2, characterized in that at the entrance the air purification reactor a solid particle filter and / or Aerosol separator is arranged. 4. Reactor according to one of claims 1 to 3, characterized in that that the UV tubes, catalysts and mirrors to each other are arranged aerodynamically. 5. Reactor according to one or more of claims 1 to 4, characterized in that a UV-activated catalyst ( 4 ), preferably titanium dioxide (preferably anatase modification) and / or titanium dioxide and silica gel are used for the rapid oxidation of the odor components. 6. Reactor according to one or more claims 1 to 5, characterized in that the mirrors and / or reflectors ( 6 ) consist of metal and / or ceramic. 7. Reactor according to one or more of claims 1 to 6, characterized in that the UV medium-pressure lamps ( 3 ) of high energy output are arranged in the reactor ( 1 ). 8. Reactor according to one or more claims 1 to 7, characterized in that an oxidation catalyst ( 2 ) and / or contact catalyst is arranged at the end of the reactor ( 1 ). 9. Reactor according to one or more of claims 1 to 8, characterized in that the thermal energy generated by the medium-pressure lamps and / or high-pressure lamps ( 3 ) is used for heating the oxidation catalyst ( 2 ) and for increasing the reaction rate of the oxidation of hydrocarbons. 10. Reactor according to one or more claims 1 to 9, characterized characterized in that for the temperature control of the oxidation catalyst a special catalyst heater inside the catalyst layer can be integrated