Xfrict UV
ECOV UV
1. What is UV
UV ray is an invisible light, locating at outer side of violet rays in the spectrogram. Therefore, it is called as ultraviolet light, with wave length between 100 nm and 400 nm. UV ray can be divided into A, B, C and vacuum ultra-violets as per the wave length. Ultraviolet C is shortened to UV-C with wave length between 200 nm and 280 nm. UV-C with wave length of 253.7 nm has the best sterilization effect, which is the origin of modern UV-C.
2. Application and Advantages of Ultraviolet
Advanced Oxidation process (AOP)
Under the irradiation of ultraviolet light, H2O2 catalytic effect, the formation of strong oxidizing substances (such as OH· free radicals) in the pollutants oxidation reaction can generate H2O、CO2 and inorganic salts, or make the large molecule difficult to degrade organic matter in the water oxidized into low toxic or non-toxic small molecule, or even directly degraded into and close to complete mineralization.
Benefits of UV System in AOP Process:
No other by-products or secondary products ;
The installation and operation steps are simple and safe;
More micropollutants can be treated per unit of power consumption compared with other treatment methods.
Application:Waste Water.
Water Disinfection
In the field of drinking water, ultraviolet disinfection has been widely recognized and applied all over the world.
UV-C has the best sterilization effect in the range of UV wave length. Through studies, UV ray mainly kills the microbes (pathogen such as germs, virus, fungus, etc.) by radiation damage and destruction of nucleic acid for the purpose of sterilization. UV rays can cause the breakage of nucleic acid's strand, inter-strand cross-linking and formation of photochemical products, etc. thus to change the biological activity of DNA and inhibit the reproduction of microbes. Therefore, this UV damage is also fatal.
Benefits of UV System in Water Disinfection:
Chemical free, environmentally friendly solution;
Effective against all known bacteria, moulds, spores & viruses including chlorine tolerant pathogens;
Does not introduce toxic substances or residues into the ingredient or manufacturing process;
Does not affect the chemical composition, taste, odour, texture or pH;
Fully automatic process and cannot be overdosed;
Compact installation footprint, easy to install and simple to operate;
Very low maintenance cost.
Application: Drinking and Waste Water, Food & Beverage, Pharmaceutical, Recreational Water, Hotel, etc.
TOC (Total Organic Carbon) Reduction
As the fabrication process rapidly developing in semiconductor industry, better ultrapure water (UPW) is required for product manufacturing. The concentration of TOC in ultrapure water will affect the yield of good product. Ultraviolet is the important device for TOC reduction in production process of ultrapure water.
The Decomposition process of TOC
Short wavelength ultraviolet (185nm) could interact with water molecules and dissolved oxygen to generate hydroxyl radicals, and also it could directly break the chemical bonds of small molecular organic compounds. Through the above two mechanisms, part of organic matter is decomposed into CO2 and H2O, and CO2 is removed by subsequent degassing membrane. The other part is removed after ionization by subsequent EDI and polishing mixed bed system.
Benefits of UV System in TOC Control:
Chemical free, environmentally friendly solution;
TOC can be controlled below 1 ppt level;
Small footprint and easy installation;
Lower cost of operation and maintenance.
Application: Semiconductor Industry, Power Plant, Chemical Industry, etc.
Photochemical Breakdown of Chloramine Compounds
The swimming pool water system needs to be disinfected by chlorination. Chlorine will combine with the organic matter in the pool water to form chloramine compounds. Chloramine has strong pungent smell and will cause health hazards to swimmers and venue staff. In addition, the corrosivity of chloramine will have a corrosive effect on venue facilities and steel structures.
Photochemical Breakdown of Chloramine Compounds with UV
Benefits of UV System in Breakdown of Chloramine:
Destruction of Chloramines;
Increased customer and employee comfort;
Reduced corrosion of steel structures;
Effective primary disinfections;
>99.9% kill of common pathogens;
Effective against Cryptosporidium and Giardia;
Oxidation of organic contaminants;
Clarification of pool water;
No THM increase or any other change.
Application: Swimming Pool, Spa, etc.
Dechlorination
In order to control microbial reproduction in the pretreatment of pharmaceutical purified water, chlorine was usually added to the water to protect the RO membrane system. The qualified residual chlorine concentration of the influent water is usually less than 0.1ppm or lower. Medium pressure ultraviolet can replace the traditional activated carbon process to remove residual chlorine.
The main forms of residual chlorine in water are HOCl and OCl-，These two chemicals could absorb ultraviolet rays in the wavelength range of 250 nm-330 nm and decompose into O2、HCl and Cl-.
The photochemical reaction as below:
2 HOCl +2 hv → O2 + 2 HCl
2 OCl- +2 hv → O2 + 2 Cl-
Benefits of UV System in Dechlorination
It could kill microorganisms while removing residual chlorine in raw water;
Effectively control the microbial problems in the distribution system and reduce the frequency of periodic disinfection in the system;
The cost of operation and maintenance is lower than that of activated carbon;
Small space occupation;
No chemicals need to be added to avoid scaling of RO system.
Application: Pharmaceutical, Drinking Water, Food & Beverage, etc.
Ozone Decomposition
Ozone has been widely used in water treatment industry as to its strong oxidation ability. Nevertheless, ozone needs to be removed before being transported to user points in some applications (such as purified water system in pharmaceutical industry). UV has been proved to be qualified to breakdown ozone.
The principle of ozone removal is to use ultraviolet energy to break the oxygen bond in ozone molecules.
Ozone absorbs ultraviolet rays in the wavelength range of 210nm-300nm, the photochemical reaction as below:
O3 + hv → O▪ + O2
O▪ + H2O + hv → 2▪OH → 2H2O2
An ozone molecule is converted into an oxygen radical and an oxygen molecule.
Benefits of UV System in Ozone Decomposition
Small footprint and easy installation;
Automatic running, accurate control of UV dose to breakdown ozone;
Lower cost of operation and maintenance.
Application: Pharmaceutical, etc
3. Key Features of Xfrict UV
High quality electronic ballast from Netherlands is adopted with long service life and low failure rate. The lamp power could be automatically adjusted by 30% - 100% according to the flowrate and water quality to achieve the preset dose requirements, At the same time, it can reduce the energy consumption of the system and prolong the lamp life.
The 7-inch color graphic touch screen is easy to operate and display. PLC control is adopted to comprehensively monitor the system function status of UV equipment. The real-time output of lamp power (kw), real-time output of UV intensity (mW/cm2), lamp working state, system running time and alarm records can be easily displayed by the screen. It can be connected with the customer's PLC system enabling the customer to remotely control and get information.
The lamp tube made in Germany has high photoelectric conversion efficiency, less lamp tubes, easy to maintain and reduced maintenance costs.
UV Chamber is designed based on CFD modeling and has advantages of compact structure, flexible installation and small space occupation. Its performance has passed the strict test. The chamber is made of 316L SS and standard working pressure up to 8 kg (option for upgrade).
UV intensity monitor from Germany complied with ONORM standard. It also has features as accurate UV dose monitoring and alarm output including high temperature alarm, low UV dose alarm and lamp failure alarm, etc.
Auto Wiper was equipped for each Xfrict UV system to make sleeve surface clean ensuring the ultraviolet pass through the sleeve efficiently.
4. Application
Food & Beverage
Pharmaceutical
Semiconductor Industry
Swimming Pool
Waste & Reused Water
Water Park
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