Introduce the development of air filters and their applications
1 Air Filter Development The prototype of the air filter is a respiratory protection device that people use to protect their breathing. According to records, in Rome in the first century, people used the mask made of coarse hemp to protect the mercury. Air filters have also made progress over the long term, but they are mainly used as respiratory protection tools in some hazardous industries, such as the production of hazardous chemicals. In 1827 Brown discovered the laws of movement of tiny particles, and people became more familiar with the mechanism of air filtration.
The rapid development of air filters is closely related to the development of the military industry and the electronics industry. During the World War II, as a result of the use of various chemical agents, asbestos fiber filter paper was used as a gas mask for the filter layer. Glass fiber filter media for air filtration was patented in the United States in October 1940. In the 1950s, the United States conducted in-depth research on the production process of glass fiber filter paper, which improved and developed the air filter. In the 1960s, HEPA filters were introduced. In the 1970s, HEPA filters using fine glass fiber filter paper as a filter medium had a filtration efficiency of 99.9998% for 013 micron particles. Since the 1980s, following the rise of new test methods, advances in the use of evaluations, and advances in filter requirements, HEPA filters have been found to have serious problems, resulting in higher ULPA filters. At present, countries are still working hard to study, and it is estimated that air filters will be raised in the near future.
Significant progress has also been made in the design of the filter itself, where zui is important for the removal of the separator, ie the development of a separatorless filter. The non-separator filter not only eliminates the risk of the partition plate damaging the filter media, but also effectively increases the filter area, improves filtration efficiency, and reduces airflow resistance, thereby reducing energy consumption. In addition, the air filter has made great progress in high temperature resistance, erosion resistance, waterproofing and antibacterial, and has met some special needs.
2 The application of air filters has become more and more serious with environmental pollution and people's environmental awareness. Air quality has become the focus of attention around the world. It is now familiar that air filtration systems not only protect mechanical equipment but also protect people. Therefore, the application range of air filtration is more and more extensive.
The air-filtered Zui application is a residential building, followed by trade and industrial buildings. In addition, filtration equipment is also commonly used in the following occasions: clean room; copying equipment; indoor air purifier; anesthetic gas filtration equipment; laser surgery applications; HVAC system (heating, ventilation and air conditioning systems); thermostatic chamber; computer printer; Air filtration system; air conditioners, etc.
2.1 Residential market Because people's requirements for the quality of life continue to improve, the original air filtration system of the house can no longer meet the needs of people, and the electrostatic filter with higher performance becomes the replacement of the original air filter. However, compared with the ordinary glass fiber filter, because the filter medium cost is high, the application of the electrostatic filter is also limited.
In China, most of the homes do not have air filtration systems, but the number of homes in China is huge and is increasing at a rate of millions of units per year. With the increasing indoor air quality and the increasing environmental awareness, air filtration systems are promising in residential applications, and there is a huge market for potential.
2.2 Office Building Applications The driving force for improving office air quality is to increase the widespread use of older office equipment. Computer terminals are a source of ozone and volatile organic compounds. Inkjet printers are a source of hydrocarbons and ozone. Dry photocopying machines produce hydrocarbons, respirable suspended particulates and ozone; fax machines produce ozone and volatile organic compounds; laser printers produce hydrocarbons, ozone and respirable particles; These products have severely polluted the indoor environment and caused certain harm to people and office equipment.
It is estimated that 30% of office buildings and public buildings in the United States have indoor air pollution problems, especially the challenges faced by public buildings such as airports and stations are far from office buildings. The airflow to the D'Hare Airport Hall in Chicago is about 51.66 million m3 per minute. To improve air quality, there are 1,100 pre-filters, 1100 final filters and 2,200 carbon filters (the carbon is 10-12 months). Need to be replaced once).
The demand for air filters in office, trade and public buildings is expected to reach $500 million worldwide in 2000.
2.3 Indoor air purifiers are becoming more and more strict with the scale of buildings, and consumers are increasingly facing the indoor air quality. Especially people with allergies, asthma or respiratory diseases, due to air pollution affect their normal life. People spend 90% of their time indoors, and the indoor air pollution level may be 2-4 times that of outdoor. Almost all spaces in the room contain pollen, mold, spores, animal hair, smoke, bacteria, viruses and harmful fibers and dust including asbestos. Poor air quality makes asthma and allergies even more severe. It is an effective method to remove indoor air pollutants with an air purifier.
There are a variety of products in the portable indoor air purifier market. In the US air purifier market, it is increasing at a rate of more than 10% per year. Japan is the second largest market after the United States. In China, the demand for air purifiers is also increasing. With the deteriorating air quality and the rise of home office, air purifiers will have a huge potential market.
2.4 Production plants Different plants have different air quality requirements. Factories equipped with exhaust hoods and pollution control equipment need to add a large amount of air. If the ambient air in these areas is contaminated, it is necessary to improve the filtration of the predecessors before distributing the added air to the workplace. In the semiconductor production and pharmaceutical industries, the cleanliness of air is high. In a typical working environment, there are 500,000 particles per cubic foot of air, and the new requirement for semiconductor production is only 1 particle per cubic foot of air. Therefore, the workplace needs to be continuously recirculated with clean air filtered through a HEPA filter. In order to maintain the cleanliness and longevity of the HEPA filter, several less efficient prefilters are required in combination.
Industrial clean rooms require continuous and effective removal of particles having a smaller particle size. The HEPA filter was once a high efficiency filter, and now the ULPA filter is a high efficiency filter, and a new generation of higher efficiency filters will be developed. Microglass fiber filter media is the primary choice for filter media, but membranes and electrostatically enhanced media have penetrated into the field and are used in sector applications.
For the exhaust gas emitted by the factory, it is required that the zui is strictly toxic. Certain heavy metals such as mercury, arsenic, chromium, antimony, etc. are very toxic and their emission limits are very strict. In terms of air toxicity, the United States and Germany have adopted new and stricter legislation. After the implementation of the new legislation, the limit of air toxicity was reduced from the original 20mg/m3 (scale) to 010004mg/m3 (scale). To achieve this goal, the factory needs to increase the filters of its predecessors to remove submicron particles. Some German companies use a traditional folded microfiberglass HEPA filter for the filtration system to interact with the pulsed air cleaning mechanism and to make the corrugations of the filter media denser. A US company has taken another step forward by designing a tubular microfiber HEPA filter.
2.5 The hospital health industry is a very large and special industry, and it has high requirements for air cleanliness. Typically, the low requirement for hospital air is filtered using a 30% efficiency prefilter and a 90% efficiency final filter. HEPA filter filtration is generally not required, but HEPA filter filtration is required in special cases such as isolation chambers, specific test and care areas.
Many HVAC systems in hospitals use 100% outdoor air, which is a good strategy for preventing patients from cross-infecting with suspended microorganisms in HVAC systems. However, 100% use of outdoor air does not eliminate the growth of microorganisms in air filtration media and its adverse effects on the care environment. Therefore, many hospitals still need to improve their HVAC systems.
The clean room of the health system is used first in the operating room. At first it was only widely used in orthopedic surgery, and it is easy to cause infection due to the long time of orthopedic surgery. The ideal level of control is to use air cleanliness around the operating table to reach level 100. It is generally recommended to use a top HEPA filtration system that covers less than 3m by 3m to include the operating table and people.
Other areas in which cleanrooms are used include birthing rooms, nursery rooms, burn rooms, and heart disease care units. One of the new developments in zui is the application of a clean room for dental surgery, which reduces the risk of infection of medical staff during long-term surgery.
2.6 Food Processing The food industry is becoming an expanding market for air filtration equipment. In order to maintain the fresh taste of food, the method of disinfection to eliminate pollution has gradually disappeared. This makes it more important to eliminate product-related air pollution. National delineation, insurance awareness and public concern are prompting meat processors, dairy producers and other food producers to update their air filtration systems.
In Europe, canned yoghurt is carried out under the premise of a clean room. As a result, the product can be retained for a longer period of time without the addition of expensive chemical preservatives.
Breweries have found that to protect their draft beer, it is necessary to control the air pollution in the environment near the filling plant. Filling in the clean room is a good choice for Zui. This type of plant requires a clean room of 100,000 class and can be filtered with a HEPA filter using a top air permeable system.
In Amiens, in northern France, Sulzer designed a clean room for his kitchen. Sulzer's kitchen cleanroom is class 100 and is equipped with the necessary heating and freezing measures. According to the US federal standard 209D, food should be packaged under the premise of 100 cleanliness and 12 °C room temperature. This ensures aseptic handling with the benefits of improved quality, increased nutrition, improved taste and extended shelf life.
3 Market Trends Looking into the future air filter market, we can find:
(1) In the current air filter market, filters using fine glass fibers as filter media still dominate, but film manufacturers are also developing in the field of air filtration, providing efficient membrane filters and improving membranes at low levels. The function of filtration under airflow resistance. They believe that membrane filters will soon replace micro glass fiber filters in high efficiency air filtration and dust collection applications.
(2) The development of high temperature resistant filters will accelerate. Metal fiber and ceramic fiber filters have found application. The glass fiber composite inorganic film can enhance the mechanical function of the fiber, giving the filter bag a strong high temperature resistance function, and it can be used at temperatures up to 480 °C. Thermoelectric engineering, coal gasification systems and waste incineration systems will provide a huge market for high temperature resistant filters.
(3) The trend in the development of the air filter market is globalization. The growth rate of purchases in developing countries will be faster than in developed countries. Factors that will stimulate the rapid development of the filter market in the next few years include: 1 the construction of a large number of new factories in developing countries; 2 the economic recovery of developed countries such as Europe and Japan; and 3 more stringent requirements for environmental protection worldwide. This combination of needs, prosperity and environmental awareness is bound to spur the rapid development of the filter market.
Shanghai Sujing Industrial Co., Ltd. If you have any needs, you can pass it with us at any time. Thank you very much for your support to Sujing and look forward to cooperating with you.
have a pleasant workday!
Thankyou&Bestregard!
SUJING—JINGHUA
The rapid development of air filters is closely related to the development of the military industry and the electronics industry. During the World War II, as a result of the use of various chemical agents, asbestos fiber filter paper was used as a gas mask for the filter layer. Glass fiber filter media for air filtration was patented in the United States in October 1940. In the 1950s, the United States conducted in-depth research on the production process of glass fiber filter paper, which improved and developed the air filter. In the 1960s, HEPA filters were introduced. In the 1970s, HEPA filters using fine glass fiber filter paper as a filter medium had a filtration efficiency of 99.9998% for 013 micron particles. Since the 1980s, following the rise of new test methods, advances in the use of evaluations, and advances in filter requirements, HEPA filters have been found to have serious problems, resulting in higher ULPA filters. At present, countries are still working hard to study, and it is estimated that air filters will be raised in the near future.
Significant progress has also been made in the design of the filter itself, where zui is important for the removal of the separator, ie the development of a separatorless filter. The non-separator filter not only eliminates the risk of the partition plate damaging the filter media, but also effectively increases the filter area, improves filtration efficiency, and reduces airflow resistance, thereby reducing energy consumption. In addition, the air filter has made great progress in high temperature resistance, erosion resistance, waterproofing and antibacterial, and has met some special needs.
2 The application of air filters has become more and more serious with environmental pollution and people's environmental awareness. Air quality has become the focus of attention around the world. It is now familiar that air filtration systems not only protect mechanical equipment but also protect people. Therefore, the application range of air filtration is more and more extensive.
The air-filtered Zui application is a residential building, followed by trade and industrial buildings. In addition, filtration equipment is also commonly used in the following occasions: clean room; copying equipment; indoor air purifier; anesthetic gas filtration equipment; laser surgery applications; HVAC system (heating, ventilation and air conditioning systems); thermostatic chamber; computer printer; Air filtration system; air conditioners, etc.
2.1 Residential market Because people's requirements for the quality of life continue to improve, the original air filtration system of the house can no longer meet the needs of people, and the electrostatic filter with higher performance becomes the replacement of the original air filter. However, compared with the ordinary glass fiber filter, because the filter medium cost is high, the application of the electrostatic filter is also limited.
In China, most of the homes do not have air filtration systems, but the number of homes in China is huge and is increasing at a rate of millions of units per year. With the increasing indoor air quality and the increasing environmental awareness, air filtration systems are promising in residential applications, and there is a huge market for potential.
2.2 Office Building Applications The driving force for improving office air quality is to increase the widespread use of older office equipment. Computer terminals are a source of ozone and volatile organic compounds. Inkjet printers are a source of hydrocarbons and ozone. Dry photocopying machines produce hydrocarbons, respirable suspended particulates and ozone; fax machines produce ozone and volatile organic compounds; laser printers produce hydrocarbons, ozone and respirable particles; These products have severely polluted the indoor environment and caused certain harm to people and office equipment.
It is estimated that 30% of office buildings and public buildings in the United States have indoor air pollution problems, especially the challenges faced by public buildings such as airports and stations are far from office buildings. The airflow to the D'Hare Airport Hall in Chicago is about 51.66 million m3 per minute. To improve air quality, there are 1,100 pre-filters, 1100 final filters and 2,200 carbon filters (the carbon is 10-12 months). Need to be replaced once).
The demand for air filters in office, trade and public buildings is expected to reach $500 million worldwide in 2000.
2.3 Indoor air purifiers are becoming more and more strict with the scale of buildings, and consumers are increasingly facing the indoor air quality. Especially people with allergies, asthma or respiratory diseases, due to air pollution affect their normal life. People spend 90% of their time indoors, and the indoor air pollution level may be 2-4 times that of outdoor. Almost all spaces in the room contain pollen, mold, spores, animal hair, smoke, bacteria, viruses and harmful fibers and dust including asbestos. Poor air quality makes asthma and allergies even more severe. It is an effective method to remove indoor air pollutants with an air purifier.
There are a variety of products in the portable indoor air purifier market. In the US air purifier market, it is increasing at a rate of more than 10% per year. Japan is the second largest market after the United States. In China, the demand for air purifiers is also increasing. With the deteriorating air quality and the rise of home office, air purifiers will have a huge potential market.
2.4 Production plants Different plants have different air quality requirements. Factories equipped with exhaust hoods and pollution control equipment need to add a large amount of air. If the ambient air in these areas is contaminated, it is necessary to improve the filtration of the predecessors before distributing the added air to the workplace. In the semiconductor production and pharmaceutical industries, the cleanliness of air is high. In a typical working environment, there are 500,000 particles per cubic foot of air, and the new requirement for semiconductor production is only 1 particle per cubic foot of air. Therefore, the workplace needs to be continuously recirculated with clean air filtered through a HEPA filter. In order to maintain the cleanliness and longevity of the HEPA filter, several less efficient prefilters are required in combination.
Industrial clean rooms require continuous and effective removal of particles having a smaller particle size. The HEPA filter was once a high efficiency filter, and now the ULPA filter is a high efficiency filter, and a new generation of higher efficiency filters will be developed. Microglass fiber filter media is the primary choice for filter media, but membranes and electrostatically enhanced media have penetrated into the field and are used in sector applications.
For the exhaust gas emitted by the factory, it is required that the zui is strictly toxic. Certain heavy metals such as mercury, arsenic, chromium, antimony, etc. are very toxic and their emission limits are very strict. In terms of air toxicity, the United States and Germany have adopted new and stricter legislation. After the implementation of the new legislation, the limit of air toxicity was reduced from the original 20mg/m3 (scale) to 010004mg/m3 (scale). To achieve this goal, the factory needs to increase the filters of its predecessors to remove submicron particles. Some German companies use a traditional folded microfiberglass HEPA filter for the filtration system to interact with the pulsed air cleaning mechanism and to make the corrugations of the filter media denser. A US company has taken another step forward by designing a tubular microfiber HEPA filter.
2.5 The hospital health industry is a very large and special industry, and it has high requirements for air cleanliness. Typically, the low requirement for hospital air is filtered using a 30% efficiency prefilter and a 90% efficiency final filter. HEPA filter filtration is generally not required, but HEPA filter filtration is required in special cases such as isolation chambers, specific test and care areas.
Many HVAC systems in hospitals use 100% outdoor air, which is a good strategy for preventing patients from cross-infecting with suspended microorganisms in HVAC systems. However, 100% use of outdoor air does not eliminate the growth of microorganisms in air filtration media and its adverse effects on the care environment. Therefore, many hospitals still need to improve their HVAC systems.
The clean room of the health system is used first in the operating room. At first it was only widely used in orthopedic surgery, and it is easy to cause infection due to the long time of orthopedic surgery. The ideal level of control is to use air cleanliness around the operating table to reach level 100. It is generally recommended to use a top HEPA filtration system that covers less than 3m by 3m to include the operating table and people.
Other areas in which cleanrooms are used include birthing rooms, nursery rooms, burn rooms, and heart disease care units. One of the new developments in zui is the application of a clean room for dental surgery, which reduces the risk of infection of medical staff during long-term surgery.
2.6 Food Processing The food industry is becoming an expanding market for air filtration equipment. In order to maintain the fresh taste of food, the method of disinfection to eliminate pollution has gradually disappeared. This makes it more important to eliminate product-related air pollution. National delineation, insurance awareness and public concern are prompting meat processors, dairy producers and other food producers to update their air filtration systems.
In Europe, canned yoghurt is carried out under the premise of a clean room. As a result, the product can be retained for a longer period of time without the addition of expensive chemical preservatives.
Breweries have found that to protect their draft beer, it is necessary to control the air pollution in the environment near the filling plant. Filling in the clean room is a good choice for Zui. This type of plant requires a clean room of 100,000 class and can be filtered with a HEPA filter using a top air permeable system.
In Amiens, in northern France, Sulzer designed a clean room for his kitchen. Sulzer's kitchen cleanroom is class 100 and is equipped with the necessary heating and freezing measures. According to the US federal standard 209D, food should be packaged under the premise of 100 cleanliness and 12 °C room temperature. This ensures aseptic handling with the benefits of improved quality, increased nutrition, improved taste and extended shelf life.
3 Market Trends Looking into the future air filter market, we can find:
(1) In the current air filter market, filters using fine glass fibers as filter media still dominate, but film manufacturers are also developing in the field of air filtration, providing efficient membrane filters and improving membranes at low levels. The function of filtration under airflow resistance. They believe that membrane filters will soon replace micro glass fiber filters in high efficiency air filtration and dust collection applications.
(2) The development of high temperature resistant filters will accelerate. Metal fiber and ceramic fiber filters have found application. The glass fiber composite inorganic film can enhance the mechanical function of the fiber, giving the filter bag a strong high temperature resistance function, and it can be used at temperatures up to 480 °C. Thermoelectric engineering, coal gasification systems and waste incineration systems will provide a huge market for high temperature resistant filters.
(3) The trend in the development of the air filter market is globalization. The growth rate of purchases in developing countries will be faster than in developed countries. Factors that will stimulate the rapid development of the filter market in the next few years include: 1 the construction of a large number of new factories in developing countries; 2 the economic recovery of developed countries such as Europe and Japan; and 3 more stringent requirements for environmental protection worldwide. This combination of needs, prosperity and environmental awareness is bound to spur the rapid development of the filter market.
Shanghai Sujing Industrial Co., Ltd. If you have any needs, you can pass it with us at any time. Thank you very much for your support to Sujing and look forward to cooperating with you.
have a pleasant workday!
Thankyou&Bestregard!
SUJING—JINGHUA
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