How Hood Filters and UV Lamps Treat Kitchen Exhaust

Hood filters

Hood filters are often undervalued with respect to their importance in a successful kitchen exhaust treatment system. A well designed hood filter can significantly reduce the amount of grease that enters the duct. This significantly prolongs the service life of treatment systems downstream. Challenges of the hood filter are cost, ease of cleaning, fire regulations, static, noise and the effectiveness.

A traditional commonly used baffle filter will remove 30% of the grease and lower the load on the duct. However a more proactive solution is to use an improved hood filter in the form of a honeycomb, coil or multi-stage porous ceramic filter etc. The efficiency of hood filters scale up with cost and some claim to remove up to 98% of grease particles; however the basis of the efficiency figure must be investigated as outlined in section. Looking for Kitchen Chimney in Pune?

An efficient hood filter is the most underutilized tool in kitchen exhausts. The savings in maintenance costs is significant and the reduction in fire risk is worth the initial investment. If this stage is done properly all the downstream elements can work in their optimum range giving the most cost effective long term results. Types of Gas Hobs.

UV Lamps

Using UV lamps to break down organic and bio -organic material is a proven sterilization technology used in multiple industries including water treatment and hospitals. The correct application of UV lamps can also be very useful in reducing particle and odor concentration in kitchen exhaust if applied correctly.

There are three types of UV rays, UV -A, UV – B and UV -C. UV -C has the shortest wavelength (~185 nm) and is capable of simultaneously producing ozone whilst undergoing photolysis with the grease particles. The additional benefit of ozone production is why UVC is the preferred wave length of ultra -violet rays for kitchen exhaust treatment.

The photolysis reaction involves the energy from UV rays breaking down predominately grease particles and vapors which consist of long chains of carbon and hydrogen. These smaller chains can continue e to be broken down by photolysis or be oxidized by ozone present in the air to form H2O and CO2. Some white ash is also generated due to the formation calcium, potassium and sodium salts etc. Looking for Built In Oven in Pune?

A certain residence time is required to allow enough time for a sufficient amount of photolysis of the grease particles to occur. A velocity of 1m/s to 2m/s is generally used in industry for standard sized lamps. The variance in speed corresponds to the contaminant loading with a longer residence time required for highly contaminated air streams.

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