Efficient filter
Efficient filter filter common sense
key word: filter, high-efficient filters and filter common sense
high-efficient filters filter common sense is introduced: efficient filter the application range of the main is electronic, semiconductor, precision machinery, pharmacy, hospitals, food and other industries to clean in demand higher medicine, civil or industrial clean place at the end of the filter.
because efficient filter general as the filter, so, at the end of the requirements of the high-efficient filter and the most strict, of course, is the need for additional & # 8221; Care & # 8221; .
first of all, we have to remind customers, to prolong the service life of the high-efficient filter, the most fundamental and most simple solution is to block in the dust filter out. That is, efficient filter access to the flow of air through the filter is, coarse efficiency filters, in effect after the air filter. At this moment, should reach 99. Air 95% of the dust particles smaller, pollution lower standard.
here need explanation is, change the filter down or stop other general need not normal work plan and arrangement. After installation debugging can assure air conditioning without fresh air to the normal operation of the equipment. So experienced customer Top products of the principles will focus on the filter. For grade 10000 and 100000 clean workshop or altitude, clean operating room area, the filter can choose F8 filter (colorimetric method 95%). So, at the end of the service life of the high-efficient filter can be up to five years. In the foreign project and to new projects. In domestic F8 filter is the most common uniform flow clean room of the filter. For chip factory level 100, 10 level or higher level of clean workshop, the filter efficiency level for common MPPS85 H10 (%), many new projects simply choose to 0. (HEPA filter efficiency of 37 m particles
V type, W type of air filters. Efficient big
environmental coalition environmental protection encyclopedia: what is the V type, W type air valve, big high-efficiency filter gate, globe, ball valve, is mainly refers to efficiently filter on modelling and ordinary filter, and different letter V hepa filter air volume air big
is bigger, basically have the following points.
an, V type, W type high-efficiency filter is great air-delivery capture 0.3 um particles of light, the application of electronic semiconductor, medicine, lens assembly, precision components, liquid crystal display
device, dust-free spray, high operating room of the purity of the occasion.
2, V type, W type big air volume efficiently filter main characteristic is big let dust capacity through the air with larger, can be used for some new air volume insufficient and needed to enter a large air but the field
.
three, big air volume with no clapboard high-efficiency filter design patterns, and a few every few surface (conventional four every eight noodles, five every ten surface and so on, the number of different sizes of the efficient filter price
case different) shape for the v-shape, usually someone called W type of air filters. Efficient big
four, efficient filter structure strong turbulence conditions, ensure good performance.
five, V type, W type big air volume efficient filter is a big load of high efficiency
Biological safety laboratory exhaust efficient filter leak detection method is discussed
biological safety laboratory exhaust efficient filter leak detection methods discussed
as biological technology research and the enlargement of the application of biological safety, by more and more high attention. Due to the operation of the biological technology processing object is microorganisms, such as living cells of the organisms, or is their recombinant, variants, in the experimental study of each link, both can cure diseases and improve the living environment and management of the positive role, there is also may cause infectious disease, harm operators
health and environmental effects of the negative. Especially in genetic engineering of experimental research, there are difficult to predict the potential danger. So, harm degree evaluation, the control scheme, design and preventive measures, management regulations for them is very important. The key of biological safety is both to control the operation of the potentially harmful object & # 8221; From inside to outside & # 8221; To the surrounding environment and to control the release, the outside environment of harmful factors & # 8221; By inside extroversion and # 8221; The operation of the invasion of the object to, therefore, biological safety protection system directly related to the surrounding ring
its for Poland and operator’s safety.
1 biological safety protective measures
1.1 control
barrier
in order to achieve the purpose of biological safety, except for the biological control and strictly operation technology, high attention to the safety education outside, more commonly used method is elaborate design protective equipment and experimental facilities, on biological hazards using closed equipment and facilities of the isolation of barriers to control, gives operators and the surrounding environment to be more perfect protection. In biological safety lab have a level 1 barrier and secondary barrier two passes (make sure the experiment of the safety of the persons, laboratory surrounding environment of safety and experimental object to the requirements of the environment), level 1 barrier (biological safety cabinet, with a cover of ultrasonic oscillator shell centrifuge, etc.) play an important role of the barrier, protect the operating personnel. Level 2 barrier (the whole laboratory wall, floor, ceiling and construction component and purification system facilities) is the periphery of the facilities, barrier level to level 1 barrier failure or its external occurrence accident, make other people around the laboratory and not exposed to the release of the experiment of material under protection [1].
1.2 row skin care products in wind system role
laboratory level 2 barrier is through the send, exhaust effective control, play its security role, the core of the security measures is through the exhaust keep negative pressure to ensure that the surrounding environment from stain. When indoor have pathogenic factors leak, exhaust efficient filter as a crucial role, if efficiently filter leak, pathogenic factors will escape with exhaust outdoor, outdoor environment of enormous pollution, result very serious [2].
2 exhaust efficient filter leak detection
2.1 leak test the feasibility of the method
in 2004/8/3 issued by the biological safety lab building specification “, GB50346-2004 (hereinafter referred to as the “standard”) requirements: & # 8221; 5.3.2 level 3 and 4 biological safety laboratory exhaust must go through efficient filter, after high efficiency filter efficiency emissions should be no less than the national standard “high efficiency air filter” in the GB13554 class B [2] & # 8220; . The “standard” provisions that & # 8221; 5.3.8 due to exhaust is the heart of the security measures, : if the exhaust filters have leakage, cannot the way off guard, not only exhaust was largely invisible, and more dangerous, so that the safety lab also was largely invisible. So, if can’t confirm exhaust filter not leak, the laboratory cannot enable [2].
Optimization design more efficient tubular air filter
BianYan many tube type high efficiency air filter is a type of new structure of high efficiency air filter [1], in addition to have good performance, low energy consumption, its structure outside the strengths of the brief, make easily, price low, so in the same technology function is of certain economy under the disadvantages. The optimal design of the air filter to enrich cast its technology and economic advantages have very careless righteousness. The optimal design of the filter as others important consideration in the security technology performance under the condition of least resistance to its for the purpose, so that the energy consumption and the low operating cost [2 ~ 3]. But many tube type high efficiency air filter is concerned, its structure, material properties of its size and resolution of bigger, so all maintenance cost increased to ignore the ephod. Therefore, the study of technology economy to filter the optimal design of the results of the influence of practical significance. In recent years, more and more engineering optimization design adopted the life cycle total cost index as the optimal design mathematical model of the objective function, for technical and economic analysis. This paper also adopted this method, in a lot of experimental research get the type of high efficiency air filter total resistance formula, and on the basis of the construction of the life cycle of the minimum total cost, the mathematical model, and the problems are solved, and, in doing so, as the air filter design roots, and get some practical conclusion.
1 based on the operations of the energy consumption and filter resistance spent
analysis
1.1 many tube type high efficiency air filter resistance
filters of the main resistance can be divided into two parts: the resistance of the filter material and the structure of the filter resistance. And the structure of the filter and including airflow resistance of mouth local resistance and balance inside and outside the filter tubes and air and filter shell frictional resistance, including two local air and filter shell frictional resistance is very small coke ignored. So, to the filter paper is concerned, its can express the resistance for [1] :
because air filter tubes in the airway, closed end are in flat look to is actually the filter tubes with the section of filter exit section is close to, and can be a mutation to the export section of the filter tubes, and to ignore the export of airway resistance. Filter export section flow velocity, so little export Happily loss weight tips local resistance DP32 can neglect [4]. Due to the existence of gas filter, air filter tube in the flow rate of the reduced gradually. According to the actual conditions, filters filter tubes airway section and filter out the pipe section near full, activity is symmetrical, velocity increase gradually, can assume list frictional resistance, that is equal to the DP21=DP22. In the filter tube filter speed is low, because in the airway flow belongs to the laminar flow, so its friction resistance can press type calculation:
filter total resistance and filter speed. Using formula (11) can be used to calculate according to the experimental data, how to deal with A coefficient of the boring problem. As an example, 1 lists one of the specifications of the table of the results. This in “1
KLC junior middle school efficient filter product introduction
KLC junior middle school efficient filter product explanation, purification equipment and air filters, clean the manufacture and installation of clean room design and building maintenance, construction of clean industry first at the same time through the ISO14001 and ISO9001 purification equipment and air filter specialized production factory enterprise, has the world first-class production lines and advanced testing equipment, is the world famous automatic air shower room, transfer window, head unit, high-efficient air fan filter mouth, KLC super clean bench, clean and efficient air filter, tent early KLC filter, the effect of the bag filter, air conditioning efficiency filter product professional design, production base of early effect. Air filter activated carbon filter air resistance early effect; Ventilation; Use big long life. To adapt to the limitations: $for the air conditioning system of the primary filtration.
first air air filter was applicable to effect the air conditioning system of the primary filtration, first used in filtering 5
