In recent years, the problem of air pollution has become more and more serious. In the autumn and winter seasons, the demand for air filtration products for commercial and civil use has increased sharply, and the frequency of replacement of industrial filters has also increased. Air pollution not only harms human health, but also restricts the development of enterprises. With the continuous development of technology, the equipment used in industrial production has become more and more advanced, and the production process has become more and more sophisticated. A small particle of dust may affect the product quality. Nowadays, air filters have become the mainstay of many companies. A must-have. With the increase of air pollution, commercial and civil air purifiers are used more and more widely. Among the many types of air filtration, one is the traditional filter type purification, and the other is the electrostatic type purification. They have their own strengths and continue to improve with the advancement of science and technology. The editor researched and sorted out the purification and filtration product brands in the industry, and analyzed and compared:

    Activated carbon filter (media type)

Advantages: Activated carbon is a porous carbonaceous material with highly developed pore structure. The porous structure of activated carbon provides it with a large amount of surface area and can fully contact with gas (impurities), thus giving activated carbon its unique adsorption performance. Make it very easy to achieve the purpose of collecting impurities.

Disadvantages: Ordinary activated carbon can not absorb all toxic gases, it has low efficiency, saturated absorption, easy to desorb and release harmful components again

    Chemical fiber, glass fiber filter media (media type)
Advantages: HEPA, which means high efficiency air filter in Chinese, is a filter that meets the HEPA standard. The effective rate for 0.3 micron particles is 99.99%. The characteristic of the HEPA net is that the air can pass, but the fine particles cannot pass. The HEPA filter is composed of a stack of sub-glass fiber membranes that are continuously folded back and forth, forming a wavy gasket to place and support the filter medium.
Disadvantages: The filter needs to be cleaned or updated regularly, and the later cost is higher.

Electrostatic filter (electrostatic type)
Advantages: The tungsten wire of the electrostatic precipitator continuously releases high-voltage static electricity, so that the dust and bacteria that come in with the air are positively charged, and then adsorbed by the negative electrode plate. It can filter dust and smoke smaller than cells. Comprehensively protect the respiratory system and greatly reduce the risk of cancer. It is easy to use. After one or two weeks of use, black dirty water can be washed out and secondary pollution can be reduced. There is no need to replace expensive consumables, and it can be electrostatically sterilized. The electrostatic tungsten wire releases high-voltage static electricity, which instantly kills bacteria and viruses, and is more effective in eliminating colds and preventing various infectious diseases.
Disadvantages: The quality of the brand varies from good to bad. If some manufacturers do not control ozone release well, it is easy to cause harm to the human body. An ozone separation screen is attached when you need to purchase. The trace ozone generated under the action of a high electric field is completely decomposed and filtered by the ozone removal filter. The brand of the filter will not produce ozone hazard ; in addition, the contrast media type filter is used up and replaced with a new one. , The electrode plate needs to be cleaned manually on a regular basis.

The following lists the economic comparison between the electrostatic filter and the bag-type F7 efficiency filter for reference:

Through the above analysis and introduction, do you have any understanding of the filtering principle of electrostatic filter and the comparison with media filter ? If you have any questions, you can contact our staff. Nanjing Yixiou is a well-known purification equipment manufacturer, with reliable product quality and perfect after-sales service. It has been praised by many companies for many years, and I believe it can meet your purification needs.

The filtration efficiency of an air filter is simply the ratio of the amount of dust captured to the original air dust content. The meaning of efficiency seems simple, but its value will be very different from the test method. When the dust concentration in the filtered gas is expressed by the weight concentration, the efficiency is the weight efficiency; when the count concentration is expressed, the efficiency is the efficiency efficiency; when other physical quantities are used as relative expressions, it is the colorimetric efficiency or Turbidity efficiency, etc.

Historically, one group engaged in HVAC and clean room purification, and another group engaged in car filters. Those engaged in dust collectors and those engaged in liquid filtration used their own methods and said their respective efficiencies. When air filter factories are mixed with the sale of automobile filters, or when dust collectors develop air filters, they will inevitably be confused by what they call filtration efficiency. In this chaotic situation, if you must know the specific efficiency value, please don’t forget to specify the specific test method and the method of calculating the efficiency. Below, please see my painstaking dry goods summary. I hope you can have a better understanding of filtration efficiency. Whether it is purchasing air filtration equipment, purification products, or choosing air purifiers in industrial clean rooms, you have your own opinions and choices. . Will not be fooled by Internet promotion and business advertisements following the trend.

The most commonly used method of expression is the counting efficiency expressed by the concentration of dust particles in the airflow at the inlet and outlet of the filter.

    1. Under the rated air volume, according to the national standard GB/T14295-93 “Air Filter” and GB13554-92 “High Efficiency Air Filter”, the efficiency ranges of different filters are as follows:

    Primary effect filter, for particles ≥5 microns, filtration efficiency 80＞E≥20, initial resistance ≤50Pa

    Medium-efficiency filter, for ≥1 micron particles, filtration efficiency 70＞E≥20, initial resistance ≤80Pa

    High and medium efficiency filter, for ≥1 micron particles, filtration efficiency 99＞E≥70, initial resistance ≤100Pa

    Sub-high efficiency filter, for ≥0.5 micron particles, filtration efficiency E≥95, initial resistance ≤120Pa

    High efficiency filter, for ≥0.5 micron particles, filtration efficiency E≥99.99, initial resistance ≤220Pa

    Ultra-high efficiency filter, for ≥0.1 micron particles, filtration efficiency E≥99.999, initial resistance ≤280Pa

    2. Since many companies now choose imported filters, and their methods of expressing efficiency are different from those in China, for ease of comparison, the conversion relationship between them is listed as follows:

    According to European standards, coarse-efficiency filters are divided into four levels (G1~~G4):

    G1 efficiency to particle size ≥5.0μm, filtration efficiency E≥20% (corresponding to American standard C1)

    G2 efficiency to particle size ≥5.0μm, filtration efficiency 50＞E≥20% (corresponding to American standards C2~C4)

    G3 efficiency to particle size ≥5.0μm, filtration efficiency 70＞E≥50% (corresponding to American standard L5)

    G4 efficiency to particle size ≥5.0μm, filtration efficiency 90＞E≥70% (corresponding to American standard L6)

    The medium-efficiency filter is divided into two levels (F5~~F6):

    F5 efficiency to particle size ≥1.0μm, filtration efficiency 50＞E≥30% (corresponding to American standards M9, M10)

    F6 efficiency to particle size ≥1.0μm, filtration efficiency 80＞E≥50% (corresponding to American standards M11, M12)

    High and medium efficiency filters are divided into three levels (F7~~F9):

    F7 efficiency to particle size ≥1.0μm, filtration efficiency 99＞E≥70% (corresponding to American standard H13)

    F8 efficiency to particle size ≥0.5μm, filtration efficiency 90＞E≥75% (corresponding to American standard H14)

    F9 efficiency to particle size ≥0.5μm, filtration efficiency 99＞E≥90% (corresponding to American standard H15)

    The sub-high efficiency filter is divided into two levels (H10, H11):

    H10 efficiency to particle size ≥0.5μm, filtration efficiency 99＞E≥95% (corresponding to American standard H15)

    H11 efficiency to particle size ≥0.5μm, SEO, filtration efficiency 99.9＞E≥99% (corresponding to American standard H16)

    The high efficiency filter is divided into two levels (H12, H13):

    H12 efficiency to particle size ≥0.5μm, filtration efficiency E≥99.9 % (corresponding to American standard H16)

    H13 efficiency to particle size ≥0.5μm, filtration efficiency E≥99.99% (corresponding to American standard H17)

The difference between horizontal and vertical automatic roller shutter filters

Everyone knows that regardless of whether we are using an automatic roller blind filter, it can be divided into horizontal and vertical. Here we briefly introduce the difference between some vertical and horizontal automatic winding filters .

1. The difference in the place of use.

Vertical type is the most common, often used in venues with no space restrictions, and the filter section is often an opening in the wall;

Horizontal type is often used in small or short spaces. When the space height is limited, we must strictly consider the effective filter area to meet the required air volume. The wide and long design of the horizontal automatic winding filter can be installed in a small space and can meet the air volume design requirements.

2. The difference in appearance.

The whole set of vertical equipment is upright and must be ascended when replacing the new filter material.

The horizontal type is standing on the side, and the replacement filter can be selected on the left or right side of the equipment.

3. The difference of the filter media winding system.

Vertical type is the filter material from top to bottom, longitudinal;

The horizontal position is from left to right or the opposite direction, horizontal.

How long does it take to replace the filter material of Nanjing Yixi’s automatic winding filter?

  How long does it take to change the filter material of the automatic winding filter?

1. It varies from region to region. The pollution in the north is more serious than that in the south, because there is less vegetation in the north, and if the pollution is serious, the speed of filter replacement will be faster. For example, in winter in Shijiazhuang, the filter material will be wound once a week or so. The filter cotton with a height of 3 meters and a length of 15 meters needs to be replaced in more than a month; while in Guangzhou, it is only wound once a month. Can be used for more than half a year. differ greatly.

2. Varies due to different seasons. The pollution is more serious in winter than in summer. In summer, because of more precipitation and more water vapor content in the air than in winter, a large amount of dust is sent back to the ground, and the air quality is better. Moreover, the summer is not as cold and dry as the winter monsoon, and there is less dust. Therefore, the summer filter material can be used longer.

3. The environmental conditions in some areas will also be affected. If there are large-scale coal and metallurgical enterprises in the local area, or long-term civil construction projects, the PM2.5 value will be too large, and the main pollutant in the air-dust will increase. In this way, the time taken by the cotton filter will naturally differ between two neighboring places.

4. In addition, the time of filter replacement is also related to the value set by the differential pressure switch. The factory setting value of our company is 100~150Pa, and the time of 100Pa filter cotton is shorter than 150Pa. This should be adjusted according to the needs of the owner.

It is always mentioned that the question of how often the filter material of the roller shutter air filter is changed by the business personnel often varies from customer to customer, region to region, and use environment. It cannot be generalized. If you need to learn more about automatic roller shutter filtration For knowledge of filter media, please contact Nanjing Yixiou sales staff.

After nearly a decade of development, the clean room industry has evolved from the original old-brand foreign-funded enterprises AAF and Camfil to dominate the world. Today, domestic-funded purification equipment and air filter companies are blooming everywhere. Clean rooms and clean rooms cannot be said to be household names in the industry, but It’s not an exaggeration to say that everyone knows it. The price and delivery period of foreign-funded enterprises cannot be guaranteed. With the widespread use of clean room in bio-medicine, food and beverage, electronics, packaging, chemical industry, as a typical clean room equipment – air shower, has been perceived by the public. Nowadays, talking to relatives and friends about the clean room and air shower equipment, many people have seen it before and can even analyze the quality, and can tell the difference between the quality and price of various brands and manufacturers. The main purpose of the air shower room is to play the role of dust and buffer when the shower personnel enter. It is installed at the entrance of the dust-free workshop to block external dust pollution outside. The air shower room is the goalkeeper of the clean room, which directly affects the cleanliness of the clean room and the grade of use and management, and further affects the pass rate of the product.

     Due to the slowdown of domestic economic growth and the sluggish market economy, various purification equipment manufacturers have been in a state of vicious competition in order to take orders, and the air shower has shown a phenomenon of low prices and poor quality. So how should the user know the key factors of selection when choosing an air shower supplier. The following editor will select a few key points for you to analyze:

1,   The material of the air shower room: First of all, there are three mainstream materials of color steel plate, cold plate paint air shower room and stainless steel air shower room. Among them, the color steel plate is of poor quality and cannot be controlled and interlocked after a long period of time, and it is basically no longer in use at present. The steel plate air shower mainly depends on the thickness of the material and the surface treatment process. The cheap ones on the market use the material thickness of 0.8-1.0 , which is thin and easy to deform. After the frequency of use is high, the interlocking and door closers will easily fail to work. Generally, it is recommended to use steel plate material of 1.2mm or above. Another material is stainless steel, which is subdivided into multiple types. At present, the purification industry mainly uses 304 2B stainless steel. This stainless steel is made of stainless steel with more than 9 nickels, which is wear-resistant and corrosion-resistant. However, many manufacturers on the market will use 201 stainless steel. This price is very different from the price of 304 stainless steel. Many small manufacturers will also use 0.8-1.0 thickness. The same thickness and strength are not enough, and the surface is easy to deform. It is interlocked and the whole The control mechanism is out of function. Nanjing Yixiou Company generally uses stainless steel with a thickness of 1.2mm and guarantees that it is made of pure 304 stainless steel.

The following focuses on popularizing professional surface treatment technology. Many manufacturers spray themselves or go to small manufacturers to spray. One of the most important links is the need for pickling and phosphating. Many manufacturers or spray manufacturers to save costs There is no pickling and phosphating tank, and no pickling and phosphating. If this step is missing, the paint itself is difficult to adhere to the equipment, and over time, it is easy to corrode and remove the paint. Although the price of such a steel plate air shower room is cheap, in fact, the customer’s gain is not worth the loss. After a long time, the appearance and performance of the air shower room cannot play the expected role.

The air shower room, transfer window, and high-efficiency air outlet of Nanjing Yixiou purification equipment are all subjected to strict pickling, phosphating and degreasing treatment, and the pretreatment process before baking. The quality of the coating and the life of the workpiece have a huge Impact

1.      Degreasing: mainly mineral oil, grease, animal and vegetable oil, these attached grease will reduce the hardness and gloss of the coating

2.      Rust removal: Yellow rust can promote the spread of corrosives under the coating, making the coating lose its shielding and moisture impermeability, and cause early damage to the coating under the condition of high temperature and high humidity, loose yellow rust, poor adhesion, and The coating comes off together

3.      Phosphating: Phosphating is the most important part of pretreatment. Use acid (or alkali) solution to remove excess alkali (or acid) on the surface in the rust removal process, and adjust the pH to be as neutral as possible ( PH=7 ). Treat metal workpieces with orthophosphate solutions of phosphate manganese, zinc, and cadmium to form an insoluble protective film on the workpiece. The formed film has a structure with tiny holes, which increases the contact area of the coating and improves Improve the adhesion of the coating to the workpiece.

The above process is not strictly done for the air shower room of small manufacturers or cheap air shower room products. Therefore, after the above analysis, I hope that customers can carefully screen the materials and processes of the air shower room, and they can go to professional manufacturers to buy them. Reliable purification equipment products.

How to choose between a clean shed and a dust-free workshop?

Generally speaking, most customers will build a clean shed in a clean room, but some customers do not want to build a separate clean room. In the clean shed, air conditioning systems, air showers, transfer windows and other purification equipment are not considered. The cost of the clean shed is about 40% to 60% of the cost of the clean room , which depends on the customer’s choice of clean shed materials and the size of the clean shed. The larger the area that needs to be cleaned , the smaller the cost difference between the clean shed and the clean room.

  1. Clean shed
Clean shed, also known as dust-free clean shed / purification clean shed / 100-grade clean shed / thousand-grade clean shed / 10,000-grade clean shed, is enclosed in a turbulent dust-free workshop space with anti-static transparent plastic cloth. Small space, using independent HEPA or ULPA and air-conditioning blower unit to become a higher level of clean space, its level is 100~10000 , the height of the internal space is about 2.0 meters, the coverage area is less than 50m2 , four pillars can be installed activity wheels, for flexibility in the use, can be equipped with air shower use.

2. Clean shed materials:
There are generally three types of clean shed frames: stainless steel square pass, iron square pass, and aluminum profile.
There are generally three types of materials for the top of the clean shed: stainless steel plate, cold-rolled steel plate sprayed, anti-static grid curtain, ( anti-static ) acrylic plate. For clean air supply part, generally choose FFU laminar flow hood (FFU laminar air supply unit )

The enclosure materials for clean sheds generally include: anti-static curtains, ( anti-static ) acrylic panels.

3. Selection of purification level of clean shed:
More customers will choose a thousand-grade clean shed, or a ten thousand grade clean shed, and a small number of customers will choose a hundred or ten thousand grade clean shed. In short , the choice of the clean shed level depends on the customer’s need for cleanliness, but because the clean shed is relatively airtight, if the level of the clean shed is relatively low, it will often bring some side effects. The cooling capacity is insufficient, and the employees will feel in the clean shed. It’s sultry and hot, so you need to pay attention to this in the actual communication process with customers.

4. Cost comparison between clean shed and dust-free workshop:
Generally speaking, most customers will build a clean shed in a clean room, but some customers do not want to build a separate clean room. When the clean shed does not consider the air conditioning system, air shower room, transfer window and other purification equipment, The cost of the clean shed is about 40% to 60% of the cost of the clean room , which depends on the customer’s choice of clean shed materials and the size of the clean shed. The larger the area that needs to be cleaned , the smaller the cost difference between the clean shed and the clean room.

5. Advantages of clean shed:
A. Fast construction speed and easy installation
B. Low cost and easy maintenance
C. Easy to control, each FFU has its own fan

Many people don’t know what a wrap-around filter is? Why do we need to use a wound filter?

We often receive calls to inquire about the operation principle, use environment and installation method of the winding filter. So here we will give you a systematic introduction to some relevant knowledge and operating principles of automatic winding filters, hoping to provide some help to potential users who need Ecolead automatic winding air filters!  

The automatic winding filter/automatic roller shutter filter has a very wide range of applications. The customers sold by Ecolead are located in various industrial fields. They are roughly divided into two types of filtration. The first is fresh air filtration, which filters out large particles in the fresh air system. Substances, to protect the quality of downstream products or the environment, improve product quality, and improve work efficiency, such as fresh air filtration in electronic factories, pharmaceutical factories, blower rooms of sewage treatment plants, fresh air filtration in air conditioning units, inlet air filtration of gas turbines in power plants, and those that require primary filtration Tunnels, tunnels, civil air defense projects, underground parking lots, etc., the second type is return air or outlet air filtration. The degree of gas pollution in this type of environment is relatively high, and it needs to be filtered by winding filters, activated carbon filtration and other methods to effectively remove Large particles in the gas, toxic and harmful substances, meet the nationally licensed gas emission standards or enter the return air system. For example, air conditioning return air filtration in textile mills, sintering system purification in metallurgical industry, gas filtration in coating industry, exhaust gas emission filtration in chemical plants, etc.  

The current winding filter customers of Nanjing Yixiou Co., Ltd. bring together many fields such as air-conditioning manufacturers, electronics factories, pharmaceutical factories, water plants, chemical plants, automobile manufacturers and related construction units, engineering contractors, environmental protection engineering suppliers, etc. Various customers

What is a vertical automatic winding filter? Ecolead Nanjing Ecolead

1. The automatic winding roller shutter is actually a kind of primary filter . It realizes the automation of filter replacement through a complete set of control system, which greatly reduces the participation of personnel, saves labor costs, and is simple and convenient. save trouble.

Second, use: fresh air port, all within a large building can be mounted inlet of the present device. For example , the air inlets of air-conditioning systems in sewage treatment plants , medicine, food, and electronics factories can be used to filter dust and other impurities in the air; the air inlets of automobile, petrochemical, and plastic spraying workshops can filter dust and harmful particles.

3. Control principle : manual and automatic.

Manually press the button switch on the equipment (when multiple units are spliced) or the “ ENT ” key on the control panel of the electric control box, the motor will start immediately, and the bottom reel will scroll the filter material down, and it will stop when you press it again .

Automatically press the “SET ” button on the control panel on the electric control box , and the device enters the automatic mode. When the original filter cotton was getting dirty and its permeability was getting worse and worse, the air pressure difference between the air inlet and outlet of the filter cotton was getting bigger and bigger. When the set value was reached, the air switch acted, the PLC received the signal, and the motor started. It runs according to the set time (the time of each operation is different, getting shorter and shorter), and it stops as soon as the time is up. This is repeated. When the filter material is used up for the last time, the travel switch will act. After the PLC receives the signal, the buzzer will give an audible and visual alarm to remind the filter to be replaced.

In addition, passive dry contacts for motor failure and filter material alarm are reserved for remote connection monitoring.

4. Structure : frame, new filter box, stop bar, press bar, winding system, control system, filter material.

Features 1, particularly compact structure, the adhesive special filter surface processing, and more enhanced ventilation and dust removal performance good 2, back support mesh with special design, high filter strength, easily deformed stable, solid, firm can work very bad 3 environments, special high-performance filter breaking elastic fibrous structure, under the same wind speed lower resistance, dust holding capacity, a high collection efficiency, it will not fold together Winds Ambassador aluminum, impact dust the amount of 4, the automatic winding type air filter media by chemical synthetic material, the elements silicon, tasteless non-toxic, environmentally safe 5, high temperature performance, high temperature resistant up to 120 degrees 6, a universal filter Performance, can be matched with all other winding filter manufacturers’ products

Performance parameter