Why cannot use pneumatics machine eduction directly compress air?
1 why cannot use pneumatics machine eduction directly compress gas?
Air has condensability, classics air compressor is contractible to air itself bulk, the air after pressure increases makes compress air.
From pneumatics machine vent of direct eduction compress air, have the following characteristic:
Water is contained in ▊ air, include water mist vapor, condensate
In air, the air that contains certain amount vapor makes moist air, the air of not hydrous steam makes do air. The air all round us is moist air. Below certain height above sea level, composition of dry airy composition and scale are stabilized basically changeless, it is versed in to the heat of whole moist air function does not have special significance, although the vapor content in moist air is not big, but the change of content is simple to the content reason of moist air the impact is very big. Of vapor content more or less to decide airy is dry with damp degree.
After moist air is compressed, vapor density increases, temperature also rises. When compressing air to cool, relative humidity increases, continue to drop to be amounted to to relative humidity when temperature 100% when, have water from the separate out in compressing air, at this moment temperature compresses ” of dew point of airy “ pressure namely.
▲ some not well-known trademark, by rusty conduit
The oiliness in ▊ air, include smeary, oily steam
The oily portion oiling in air is lubricant compressor is in because of air in reducing a process, be contacted with oil and contain oil, although pass the depart of oily mist segregator to also won’t get rid of oil entirely, commonly used oily mist segregator can control the oil content in air between 3ppm-6ppm.
▲ some not well-known trademark, by the equipment of smeary attaint
All sorts of ▊ solid state material
The delicate last stage that if become rusty,bead of delicate last stage of powder of mud, metal, balata, tar reachs filter material, sealed material, in addition still material of a variety of harmful chemical peculiar smell wait.
▲ some not well-known trademark, damaged pneumatic equipment
The change that ▊ high temperature causes
Through compression air temperature, partial water and oily portion already became spirit can.
International standard is organized (ISO) what belong to machinery of compressor, pneumatic and tool committee (TC118) put forward 1986 about compressing air dry purifying device is mixed the international level that reduces air quality, compress ISO8573.1 of level of air quality grade to be the contaminant cent in compressing air among them solid impurity, water and oil 3 kinds (Chinese adopting equation ISO8573 namely national level GB/T13277 – 91 ” use commonly reduce air quality, chart is as follows.
ISO8573-1: 2010 in formulary compression air quality grade is as follows:
Grain of the solid in expressing 1—— to compress air purifies grade
Water purification order and degree always is contained in compressing air
In compressing air, total oil content purifies grade
2 why should undertake removing water to compressing air dry, purify filter processing?
■ 1, the quality that reduces airy character to affect a product directly, wait for an industry to medicine, food, accurate electron, spin especially.
■ 2, average machine and general pneumatic loop cross filter precision <40μm; Motor of logistic component, efflux component, gas filter precision <10μm; Bearing of food, medicine, electron, air filter precision <5μm. Compress air without what purify, use to equipment be being produced with the product is adverse.
■ 3, have very big effect to the electromagnetism a powerful person, air cylinder life that contains sealed component device) , the loss that causes from this often enrages a source to handle the cost of device and upkeep costs more than greatly.
■ 4, be like without processing jam valve, corrode pipeline thereby, cause the air leak of pneumatics machine, equipment of aircraft of pneumatics of if things go on like this can’ts bear heavy burden, can cause attaint to bring about manufacturing backwater, if come again right now,pneumatics machine meets maintenance to be caused accordingly safeguard cost to increase, serious meeting product discards as useless.
■ 5, fall in a variety of hidden trouble, the health that contacts personnel and safety also can be browbeaten accordingly, production and working environment suffer an effect.
Accordingly, do not suggest to use air compressor eduction directly compress air, must undertake removing water to compressing air dry, purify filter processing.
What does a 3 whole processing system that enrage a source have?
Mix by generation, processing store the system that reduces composition of airy equipment place calls gas source system. Typical gas source system divides composition by following ministry normally:
Air compressor, hind condenser, filter, gas tank, drier (refrigerant type or adsorptive type) , automatic catchment blowdown implement, a powerful person of conduit transporting gas, pipeline, appearance. Afore-mentioned equipment different need according to technological process, combination becomes whole gas source system.