The main points of ultraviolet ( UV ) technology to control water pollution

The molecular structure is destroyed by the energy of photons, so that harmful substances become harmless substances, while for living organisms - microorganisms, bacteria, viruses, their DNA is changed so that they cannot replicate (reproduce). differences from other methods.
(1) UV method has no secondary pollution and no residue
(2) Other methods, especially the chemical methods that are widely used at present, such as disinfection of water plants, currently mainly rely on chlorine gas, which is itself a poisonous gas, and many of its by-products are carcinogenic and teratogenic. Pesticides, food additives, etc. Many are harmful to people and have residues.

Principle statement

(1) The energy of a photon is inversely proportional to its wavelength and is given by            
E=ch/λ……
1
           
In the formula: Ephoton energy, unit:mj/mol
            
c
speed of light.
             
hplanck
constant.
             
λ—
wavelength of light.

From the above formula, the photon energy is inversely proportional to the wavelength, that is, the shorter the wavelength, the higher the energy.
Currently we use the following commonly used bands
UVC   band   λ=254nm    E254=472kj/mol VUV band   
λ=185nm
  E185=647kj/mol
  
λ=172nm    E
172=696kj/mol

The energy level required to break the oxygen O2 molecular chain is 493.6 kj/mol That is  
λ=185nm
wavelength can be achieved. Ozone is produced.

However, there is no light of this wavelength in the natural atmosphere and must be artificially generated, that is, the special ultraviolet light source of this project.

(2) There are three types of spectrum generation.
● Atomic Spectroscopy It is often produced by the variation of electron energy levels in atoms with multiple single lines ..
● Molecular Spectrum    Continuous Broad Spectrum
● Excimer spectroscopy     Narrow and broad spectral lines
(3) Using the wide spectral line in the time domain relative to the narrow spectral line in the frequency domain. Approximate monochromatic, such as broad spectral lines in the inverse frequency domain, corresponding to narrow spectral lines in the time domain. That is, a narrow pulse.
(4)The purpose of this project is to use the above basic principles to optimize the spectral line configuration, reasonably select the energy distribution, and at the same time reasonably select the raw materials and their processing technology on the hardware. And design special experimental production equipment according to process requirements.
The overall technical idea and innovation of the project
(1) Appropriate spectral lines of light
(2) Design, select, and design a suitable light source that can efficiently generate high-power light waves.
(3) According to different purposes and goals, the limited energy is "focused" on the target, starting from the following three-dimensional   
1) Focusing in space domain, such as laser.
  
2 ) In the time domain, the "primary focus" is like high-energy pulsed light, which concentrates the energy at one point in time.
            
3) The frequency domain (wavelength) "focusing" concentrates the energy on a narrow spectral line, such as bacteria and viruses are only sensitive to light waves with input = 265NM .
Water treatment belongs to the category of ultraviolet light waves in the technical field (mainly referring to UVC, UVD bands - namely short-wave ultraviolet and vacuum ultraviolet bands). The light in this band can be generated by the sun, but it only exists in the universe.
According to the light wave energy formula, the photon energy is inversely proportional to the wavelength. Because of its short wavelength, it has extremely high energy enough to kill existing viruses, germs, microorganisms, and can effectively degrade a considerable part of human beings, independently or in combination with other technologies. harmful materials. But unfortunately it also endangers human beings, making it impossible for them to survive. Fortunately, the earth's atmosphere, especially the ozone layer, has a strong absorption function for this light wave and intercepts it all in the outer space outside the earth. And only let those most of the light waves that are useful to human beings and all things on earth and depend on for survival enter the earth. Only then did the earth become a stellar existence with life.

Those bacteria and viruses that harm human beings are difficult to survive and reproduce in the sun. If the light waves with shorter wavelengths similar to the universe can be artificially generated, and a series of system applications can be developed with this key technology and product as the core. product. It can achieve the purpose of energy saving, high efficiency, high performance (sterilization, degrading harmful pollutants, etc.), and at the same time it is safe for human beings. This is the purpose of this project.

The application field of this project is environmental protection. Specifically, water pollution control. This is a multi-disciplinary and inter-professional system engineering. Ultraviolet technology is one of the means. In addition, there are other methods such as chemical methods. Chlorine gas and chlorine-based products widely used in the sterilization and disinfection fields of drinking water, reclaimed water, sewage, swimming pools, etc. are still the mainstream methods at home and abroad, especially in China. However, with the development of today's technology, its drawbacks have been gradually discovered. Many of its by-products are carcinogenic to humans and cause stagnation, which brings serious consequences to the ecosystem. Therefore, developed countries have gradually adopted UV technology in this field. Because of its high efficiency and no secondary pollution, it is growing rapidly. The arrival of the new drinking water standard in China after July 2012 will inevitably lead to a huge demand for UV technology.

Through innovations in the three fields of ultraviolet light source, light source power supply and water treatment system, ultraviolet technology has become the mainstream technology in the field of sterilization and disinfection; the composite technology system with ultraviolet technology as the core has successfully carried out the effective control of water pollution.
More than one billion people worldwide lack access to safe water due to water pollution and lack of safe water supplies . With the rapid development of China's industry in the past 30 years, the environment has paid a heavy price. Excessive consumption of water resources has made our country a water-poor country. At the same time, the discharge of pollution has seriously reduced the water quality and directly endangered the life and health of our people. Our government attaches great importance to this. In the 12th Five-Year Plan, all ministries and commissions have formulated a specific timetable to enter the mandatory implementation period of the new drinking water quality standard by July 2012 . Its new standard water quality indicators have increased from 35 to 106 and revised 8. At the same time, specific indicators are also given in the plan of the environmental protection department for sewage discharge; and supervision should be strengthened. In the 12th Five-Year Plan, "drinking clean water" has been mentioned as a strategic height related to people's livelihood and stability. The "standard" of water is imperative. Ultraviolet technology is unique and environmentally friendly in the field of sterilization and disinfection. Completing the "standard" of water has an irreplaceable competitive advantage.

Ultraviolet technology will become the mainstream technology in the field of sterilization and disinfection:
At present, water supply and drainage disinfection methods can be divided into two categories, namely chemical disinfection method and physical disinfection method. Chemical disinfection methods include chlorination and ozone disinfection; physical disinfection methods include ultraviolet disinfection. Chemical disinfection methods generally produce disinfection by-products. The residual chlorine in the chlorination disinfection process is toxic to organisms such as fish in the receiving water body, and it has been found and confirmed that chemical disinfection methods such as chlorine disinfection will produce chloroform (THMs). and other carcinogenic, distorting by-products; ultraviolet disinfection technology is a kind of physical disinfection method, with broad-spectrum sterilization ability, no secondary pollution, due to the requirements of environmental protection, it is expected that the qualified sewage treatment plants will use ultraviolet rays in the future. Disinfection has become the mainstream technology to replace traditional chemical disinfection methods, so there is a huge demand for UV technology in the field of water treatment.

To catch up with the world's advanced level, the substitution of imported
ultraviolet disinfection method was first used in the United States ( the US Environmental Protection Agency completed the first demonstration project of ultraviolet disinfection of sewage in 1970 ) , , and it is now widely used in the United States and Canada. After more than 30 years of development, UV technology has become a mature, reliable, efficient and environmentally friendly disinfection technology, and has been widely used in many fields abroad. Ultraviolet disinfection technology is the latest generation of disinfection technology that emerged in the late 1990s . It has a wide range of applications in the field of water treatment. It integrates optics, microbiology, electronics, fluid mechanics, and aerodynamics. It has the characteristics of high efficiency, broad spectrum, low cost, long life, large water volume and no secondary pollution. , is internationally recognized as the mainstream disinfection technology in the 21st century . Sterilization is the main function of UV technology in the field of water and wastewater. In many industries in my country, it is very necessary to apply UV technology to water treatment systems, such as food and beverage industry, pharmaceutical industry, cosmetics industry, health care products industry, high-end manufacturing, high-tech industries and so on. At present, there is a big gap between my country's application promotion and foreign countries. The core technology and core components of a few projects rely on imports. The scientific research results of independent intellectual property rights cannot develop rapidly due to the lack of sufficient R&D investment and policy support. , and also affects the transformation of existing results. Facing the huge demand brought by China's current environmental protection situation , foreign counterparts have a great tendency to seize the Chinese market. As a high-tech enterprise that is inspired to make contributions to ultraviolet technology, in order to replace imports as soon as possible, it is urgent to increase and accelerate the use of ultraviolet technology in water. R&D investment in pollution control. Facing the severe situation of water pollution in our country and the imminent implementation of the new water law, the establishment of this topic is just in line with the needs of the current situation .

UV core technology innovation, development of national industries, and participation in international market competition.  

(1) The domestic UV water treatment industry is relatively backward. Most are in a state of simple integration. The final performance is restricted by the level of UV light source and power supply, and it is difficult to make breakthroughs in technology. Through the technological innovation of core technologies, especially core components, the successful development of new, high-efficiency, high-performance light sources and power sources suitable for professional water treatment will drive the rapid development of this field in China. Finally, it has become a breakthrough in solving water pollution control; therefore, the establishment of the project is also the need for technological development and the industry to move to the high end.
2)Introduce the modification process of new nanomaterials and new quartz materials (key materials of light sources). The service life of the existing light source can be greatly improved. Reduce operation and maintenance costs and facilitate the popularization of future industrial system products to form strategic emerging industries and the revitalization of national industries.

Main innovations :

1 At present, the domestic UV industry operates in isolation in a certain link of the industry chain, which limits the development of technology. Due to the wide range of majors and industries in this field, they do not know each other. It is difficult to develop a single technical field to form an application system with a certain level, and the research and development of key components, special ultraviolet light sources and power sources, is difficult to meet the requirements of the system. On the other hand, companies engaged in application systems do not understand the former technology, so it is difficult to put forward exact requirements and match them; and the light source power supply is another field that is different from the light source industry. The coordination of the three is more complicated. Moreover, the existing system of system companies is difficult to ensure that the achievements of light sources and power supplies are exclusively enjoyed by system companies, and intellectual property rights cannot be effectively protected. The core content of UV technology: light source, power supply, application system. It is not only three different industries, but also has a very close matching relationship between them. Only in the "three-in-one" (or N -in- one) system where one enterprise completes the entire industrial chain can it be possible to achieve the best performance in each key link in the industrial chain. The best match can overcome the outstanding contradictions in the coordination of each link, so that the innovation of UV technology can be developed rapidly. This has been proved by the successful experience of large enterprises in foreign counterparts. In order to catch up with and surpass the advanced level of China and the world as soon as possible, it is necessary to build an industrial chain and to innovate the system. Only institutional innovation; technological innovation has organizational guarantee. After nine years of system innovation practice, we realized that the "three-in-one" industrial chain scientific research system is the right move to support UV technology innovation.
2)Technological innovation
* Light source innovation: Research and develop new light sources ( pulse light sources, electrodeless light sources, high-power ultraviolet light sources and special light sources suitable for water treatment )
* Power innovation: Develop the matching light source power supply and achieve the best match with the light source and system.
3) System innovation:
1) In the system design, the three parts in the industry chain are optimally matched; and keep synchronization
2)In the system design, the pursuit of better sterilization and disinfection effect, adhere to the combination of ultraviolet core technology and other applicable technologies.
3)Use the existing research and development achievements (self-developed various sensors, special circuits, detection systems, etc.) to realize the intelligentization of the system.
1 High power low pressure mercury lamp
2 Promise light source
3 pulsed light source
5 High power low pressure mercury lamp power supply
6 Medium pressure mercury lamp power supply
7 Electrodeless light source power supply
8 Pulse light source power supply  
10 UV water treatment system  
Domestic Status and Trends Due to the needs of environmental protection,
UV technology will become the mainstream technology and development trend in the field of water pollution control, sterilization and disinfection.

(1)The domestic development status is far behind developed countries abroad, and there are few proprietary intellectual property rights. Basically in the agent, technical support and service status of large foreign companies. Even if they have their own products, they are mostly low-level integration. In particular, some high-performance core components - light source and power supply, mainly rely on imports . Although some large domestic companies also have similar products; but it is not its main product (mainly lighting source) ; its products and technology are still far away from foreign countries, and it is difficult to meet the needs of water pollution control.
(2)Foreign developed countries have been in the field of ultraviolet application for decades, and through continuous mergers and acquisitions, they have gradually formed multinational companies with upstream, mid-stream and downstream industrial chains, and monopolized most of the international market. It is now entering China to preempt the domestic high-end market.
(3)The international ultraviolet water treatment system has gradually entered into diversification (for different application objects), large-scale, specialization and automation. Its core components, the light source and power supply, are developing in the direction of high power, high efficiency and high performance.
(4)New light sources and power sources have entered the application of system products in developed countries such as Germany, the United Kingdom, and the United States. However, the newer core components of light source and power supply products are basically undertaken by small and medium-sized enterprises and colleges and universities. They are still in the development stage and are still far from industrialization.

Domestic existing technology base

(1)Most of the ultraviolet water treatment system technology is in the stage of imitation, digestion and absorption, but colleges and universities have developed in theory and have gradually formed a system. Environmental majors have been established in universities, but they are relatively weak in terms of ultraviolet technology. , the cooperation between production, academia and research is relatively weak in this field.
(2) Although the UV light source and power supply, especially the products dedicated to water treatment systems, have technical achievements, the application research results are very poor, so that the "transformation of achievements" is still in theory, and it is impossible to achieve the effect indicators in engineering practice and environmental protection. 'Standard'; it is imperative to strengthen 'applied research'.
3)Although some large listed companies also make light sources, their main business is still lighting sources, and the investment in research and development of ultraviolet light sources and new light sources for water treatment is insufficient. Mainly because the market has not formed. This is related to the inadequacy of national and environmental standards and enforcement. The introduction of the 12th Five-Year Plan will rapidly change this situation.
(4)For the development of water treatment systems and light sources. Due to the rapid development of the manufacturing industry in China, it has a good industrial foundation, relatively low costs, raw materials, production equipment and supporting advantages in foreign countries, which has a good foundation for the development of this industry.
(5) 该 Universities and scientific research units in this field have a certain foundation in basic research and development, and the corresponding surrounding fields are relatively complete and complete; but the research direction is not clear enough, the industrial chain, and the lack of integration between enterprises. In the future, it will be driven by the industrial chain. Take the road of combining production, learning and research. It is very beneficial to the technological development of our country in this technical field. Existing research and development experience Aerospace Hongda has been researching ultraviolet technology for 17 years since 2003. It started with the introduction of ultraviolet radiation light cleaning technology abroad at that time, and the experience started from system integration . It was found that the core components, special ultraviolet light sources and power sources could not be solved, and the domestic technical indicators reached If not, the import is "banned". The foreign blockade has forced us to encourage independent research and development, starting from the core component light source research and development and finally transferring to the process of system research and development.
(1) In 2003-04 , focus on breakthroughs in special ultraviolet light sources
(2) The light source power supply (development of electronic ballasts) that is synchronized with it
(3) Research and development of production test equipment.
(4) Research and development of light source detection equipment - vacuum ultraviolet spectrometer.
(5) Research and development of ultraviolet radiation light cleaning machine
(6) Research and development of optical plasma air purifier in 2005-07
(7) Research and development of UV oil fume purification system in 2008-09
(8) 10 years - start the research and development of water treatment and "ship ballast water system" to solve the problem of international biological invasion.
This includes:
   
a.Research and development of key parts of water treatment system, research and development of various measurement and control sensors, computer control unit
   
b.Cooperate with the research and development of ballast water high-power power supply.
    
c. Development of High Power Medium Pressure Mercury Lamp
    
d. Development of ballast water testing system.
(9) Research and development of non-standard equipment for special light source production experimental equipment according to different stages during the project.
Achieved scientific research results  

(1) Developed the key equipment for special light source detection - vacuum ultraviolet spectrometer. Can measure 50-300nm light wave. Make it the key testing equipment for special UV light sources. Domestic counterparts do not have (there are only a few imported equipment in China, most of which are used in aerospace and nuclear industries).
(2) Special experimental production equipment for special ultraviolet light sources (not available in the market) has been developed.
(3) Developed a high-power 300W UV light source for the field of photochemistry . It has been used in large-scale ship equipment, military ultraviolet communication, and new organic thin-film photovoltaic materials (used by many universities, Chinese Academy of Sciences and other R&D institutions) and other fields. Solve the surface treatment problems of modern materials. In addition, it is also used in the new process of epitaxial inspection wafer modification treatment in the semiconductor industry. Replacing the original chemical method greatly improves the economic benefits of users. This technology is authorized by the invention patent, and it is foundational to transplant this technology into water treatment applications. (The core technologies have their own commonalities, but the application objects are different.)
4)The special series of special ultraviolet light sources developed by the company have been successfully used in the field of air treatment. Finland 's B iozone pure brand air purifier company gave up the original foreign supplier and chose our core components for more than 10 years. The core components used in air purifiers have entered the international advanced ranks.
5)The ultraviolet technology has been applied to air pollution control and some indicators such as the sterilization and disinfection effect of various products have surpassed domestic counterparts. The disinfection effect of this product has passed the sterilization and disinfection effect tests of a number of national-level testing units (China Center for Disease Control and Prevention, Academy of Military Medical Sciences, National Environmental Protection Product Testing Institute), etc.
6)Many varieties of its core components - light source and power source have passed European certification.
7) The company's system products and core components have obtained ten authorized patents and authorized intellectual property rights.
8)The company's UV system products and key components have won a number of national awards
9) The two products have the Beijing independent innovation product certificate and are listed in the government procurement catalog.
10In 2007 , the 'Ultraviolet Technology Research Institute' was established (registered with industry and commerce and recognized as a "Beijing Scientific Research Institution" by the Beijing Municipal Science and Technology Commission)
11 In 2011 , signed an industry-university-research agreement with a domestic electric light source college and became their practice base, selected outstanding graduates to join the enterprise, and hired electric light source professional and technical backbones who have worked in foreign companies (foreign famous brand enterprises) for many years as their positions The person in charge of the experimental base is ready to catch up with the world's advanced level.
12) A group of inter-professional, multi-disciplinary, and old-aged, middle-aged and youthful backbone teams have been trained in the ultraviolet industry chain. Especially the R&D personnel in the three parts of the industry chain and the technician team with certain experience and hands-on ability.
13)Established close cooperative relations with universities, scientific research institutions and well-known experts and scholars in the industry. In order to support the school's basic research, it has provided light source test samples for many years for free; it has established a good relationship with relevant professional scientific research institutions and has certain resources. like: Professor of Tsinghua University School of Environment, Water Treatment Expert Director of International Ultraviolet Association - Liu Wenjun Professor and Doctoral Supervisor of School of Environment, Tsinghua University - Zhang Pengyi Fudan University Electric Light Source Expert (Originator), Vice President of Fudan University, Director of the Electric Light Source Research Institute - Professor Cai Zuquan, Fudan University Electric Light Source Expert - Professor Zhu Shaolong Professor Zhang Zhonglian and Dr. Tang Yi from Beijing Institute of Technology. Dr. Yuan Guimei from China University of Petroleum, etc.

Research Conditions and Current Situation of Research and Development Teams

Research conditions
1) From the organizational structure, a small batch production system for R&D and testing with UV technology as the core has been established, which has promoted R&D teams in multi-professional fields. Including the design team of UV application system, the professional R&D team of special light source, the professional R&D team of light source power supply and the technician team with rich practical experience.

1)After years of accumulation and investment, a modern pilot-scale light source and power supply production test base of 1,200 square meters has been established.

2)An experimental production line with small batch production capacity has been successfully developed independently.
3)The key instrument for the detection and development of light source and light source material - vacuum ultraviolet spectrometer has been successfully developed independently; this item fills the gap in the domestic industry. Created conditions for the establishment of the State Key Laboratory.
4) The research and development laboratory of light source power supply and application system has been established; dozens of instruments and equipments suitable for the project have been provided, and good research and development conditions have been obtained.
5)After many years, it has established a joint system with various professional colleges, scientific research units and suppliers of opto-mechanical and other majors to realize the mutual benefit of human processing and experimental conditions, especially the extensive cooperation between all research institutes of aerospace systems.