The UV LED curing machine is different from the traditional high pressure mercury lamp curing equipment. The UV light produced by the traditional curing machine looks bright and has high heat. In fact, its spectrum is very wide. The real part of the energy in an effective curing UV spectrum is only a part of its energy. A considerable part of the energy is generated in the visible (stray light) and heat, which causes serious and easy damage to the operator's eyes. The hot deformation of the workpiece is irradiated by the LED point light source, which emits high purity 365 nm monochrome ultraviolet light, which belongs to the cold light source; the workpiece temperature only rises about 3 degrees, the workpiece will not deform, and its energy is highly concentrated in a certain ultraviolet spectral band with effective curing effect. This is the UV-LED point light source, although only about 200 MW of ultraviolet light intensity, but its actual use effect and. The main reason why the curing effect of high pressure mercury lamp with light intensity of 1000-2000 MW is similar is that the curing time of UV LED curing machine is usually shortened to 0.5-5 seconds.

 

A: Fenton reagent will be very effective as an antimicrobial treatment wastewater. The antimicrobial effect may increase more from low pH (Fenton effect is best at about 3 pH). It is also an economic problem. Reducing pH to 3-4 is very expensive and increases the water level of dissolved solids. Ultraviolet disinfection of Fenton's treatment process will be a cheaper one.

 

 

 

Question 2: The specifications for UV dose rating are in microwatt seconds/cm2. For example, one such unit is evaluated at 16,000 microwatt seconds/cm2. How to convert this number to microwatt seconds/cm2?

 

Answer: Most scientists and engineers now use ultraviolet radiation doses of "mJ/cm2" (millijoule per square centimeter) or "J/m2" (joule per square meter) in the UV business unit (correctly speaking, "energy density"). Unit "J/m2" in most parts of the world, except North America, "mJ/cm2" (10 J/m2 of 1 mJ/cm2). The old term "mW-s/cm2" (milliwatt seconds per square centimeter) is equivalent to "mJ/cm2", because "in ws" is the same as "J" (joule). Please note that 1000 mW = 1 mW.

 

Please note that "dose" ("dose" is a word that is redundant "dose" and should be encouraged) (for example, when ultraviolet light in the sun is absorbed by the skin and causes the sun's radiation to be fully absorbed, it is generally applicable to tanning or sun burning). The term "dose" is inappropriate for this situation because ultraviolet light is incident on microorganisms that absorb less than 1%. That's why "energy density" (in the definition of UV "event" in a very small area, from all directions) is more appropriate.

 

Often confused units are "mW/cm2" (fluence rate or radiation) and "mJ/cm2" (fluence or UV dose). The exposure time of "integral flux rate" (or radiation) is obtained in seconds (mW/cm2) by means of "energy density" (UV dose).

 

 

 

Question 3: Can ultraviolet light be used to protect postal workers'mail from anthrax pollution?

 

A: Few people know about inactivated anthrax spores in ultraviolet light in the air. Sufficient arrangements will have to be made for such spores to receive sufficient ultraviolet radiation. If a person establishes such an arrangement, there must be safeguards to prevent workers'eyes from being exposed to ultraviolet rays and workers' skin exposed to latex gloves from blocking ultraviolet rays.

 

 

 

Question 4: Will water become radiation when treated with ultraviolet (UV) radiation?

 

Answer: This is typical of confusing the word "radiation". "Ultraviolet radiation" treatment of water, in other words, "UV light" treatment of water, which will not cause water radiation, can be used at ease. Ultraviolet light is invisible because our eyes are insensitive to ultraviolet light.

 

Because ultraviolet light is "light", it passes through air and water at the speed of light and disappears when the UV source of ultraviolet light is turned off. Whether there is "residual" or not, the water that has been exposed to ultraviolet rays is the same, because it was previously exposed, and it is certain that the water is "radioactive". It's like shining bright light into a glass of water. It's like when you turn off the lights, the water doesn't change.

 

The design of ultraviolet water disinfection device provides enough "UV dose" to render any pathogenic microorganism "ineffective" in water. What happens is that the DNA of microorganisms absorbed by ultraviolet radiation is destroyed so that microorganisms cannot reproduce. Cells that cannot be reproduced do not cause disease.

 

Futansi (Shanghai) Electronic Technology Co., Ltd. specializes in the production of UV LED point light source, UV LED line light source, UV LED surface light source, UV LED oven, UV LED curing machine.