Air Purification System Model HXK-618/13 for Air Separation Plant
Oxygen PLant Spare Parts
1. description
An air purifier or air cleaner is a device which removes contaminants from the air in a room. These devices are commonly marketed as
being beneficial to allergy sufferers and asthmatics, and at reducing or eliminating second-hand tobacco smoke. The commercially graded air purifiers are manufactured as either
small stand-alone units or larger units that can be affixed to an
air handler unit (AHU) or to an HVAC unit found in the medical, industrial, and commercial industries.
Air purifiers may also be used in industry to remove impurities
such as CO2 from air before processing. Pressure swing adsorbers or other adsorption techniques are typically used for this.
2. use and benefit of purifier
Dust, pollen, pet dander, mold spores, and dust mite feces can act as allergens, triggering allergies in sensitive people. Smoke particles and volatile organic compounds (VOCs) can pose a risk to health. Exposure to various components
such as VOCs increases the likelihood of experiencing symptoms of sick building syndrome
3. purifying techniques
There are two types of air purifying technologies, Active and
Passive. Active air purifier use ionisation for cleaning the air.
Passive air purification units on the other hand use air filters to
remove pollutants. They are more efficient since all dust and Particulate Matter is permanently removed from the air and collected in the filters.
Several different processes of varying effectiveness can be used to
purify air.
- Thermodynamic sterilization (TSS) - This technology uses heat
sterilization via a ceramic core with micro capillaries, which are
heated to 200 °C (392 °F). It is claimed that 99.9% of
microbiological particles - bacteria, viruses, dust mite allergens,
mold and fungus spores - are incinerated. The air passes through
the ceramic core by the natural process of air convection, and is then cooled using heat transfer plates and released.TSS is
not a filtering technology, as it does not trap or remove
particles.TSS is claimed not to emit harmful by-products (although
the byproducts of partial thermal decomposition are not addressed) and also reduces the concentration of ozone in
the atmosphere.
- Ultraviolet germicidal irradiation - UVGI can be used to sterilize air that passes UV lamps via forced
air. Air purification UVGI systems can be freestanding units with
shielded UV lamps that use a fan to force air past the UV light.
Other systems are installed in forced air systems so that the
circulation for the premises moves micro-organisms past the lamps.
Key to this form of sterilization is placement of the UV lamps and
a good filtration system to remove the dead micro-organisms. For
example, forced air systems by design impede line-of-sight, thus
creating areas of the environment that will be shaded from the UV
light. However, a UV lamp placed at the coils and drainpan of
cooling system will keep micro-organisms from forming in these
naturally damp places. The most effective method for treating the
air rather than the coils is in-line duct systems, these systems
are placed in the center of the duct and parallel to the air flow.
- Filter - based purification traps airborne particles by size exclusion.
Air is forced through a filter and particles are physically
captured by the filter.
High-efficiency particulate arrestance (HEPA) filters remove at least 99.97% of 0.3-micrometer particles and
are usually more effective at removing larger particles. HEPA
purifiers, which filter all the air going into a clean room, must be arranged so that no air bypasses the HEPA filter. In
dusty environments, a HEPA filter may follow an easily cleaned
conventional filter (prefilter) which removes coarser impurities so
that the HEPA filter needs cleaning or replacing less frequently.
HEPA filters do not generate ozone or harmful byproducts in course
of operation.
Filter HVAC at MERV 14 or above are rated to remove airborne particles of 0.3
micrometers or larger. A high efficiency MERV 14 filter has a
capture rate of at least 75% for particles between 0.3 to 1.0
micrometers. Although the capture rate of a MERV filter is lower
than that of a HEPA filter, a central air system can move
significantly more air in the same period of time. Using a
high-grade MERV filter can be more effective than using a
high-powered HEPA machine at a fraction of the initial capital
expenditure. Unfortunately, most furnace filters are slid in place
without an airtight seal, which allows air to pass around the filters. This problem is
worse for the higher-efficiency MERV filters because of the
increase in air resistance. Higher-efficiency MERV filters are usually denser and increase
air resistance in the central system, requiring a greater air pressure drop and consequently increasing energy costs.
- Activated carbon is a porous material that can adsorb volatile chemicals on a molecular basis, but does not remove larger
particles. The adsorption process when using activated carbon must
reach equilibrium thus it may be difficult to completely remove
contaminants.[12] Activated carbon is merely a process of changing contaminants from
a gaseous phase to a solid phase, when aggravated or disturbed
contaminants can be regenerated in indoor air sources.[13] Activated carbon can be used at room temperature and has a long
history of commercial use. It is normally used in conjunction with
other filter technology, especially with HEPA. Other materials can
also absorb chemicals, but at higher cost.
- Polarized-media electronic air cleaners use active electronically
enhanced media to combine elements of both electronic air cleaners
and passive mechanical filters. Most polarized-media electronic air
cleaners use safe 24-volt DC voltage to establish the polarizing
electric field. Airborne particles become ionized, or charged, as
they pass through the electric field and adhere to a disposable
fiber media pad. Ultra-fine particles (UFPs) that are not collected
on their initial pass through the media pad are polarized and
agglomerate to other particles, odor and VOC molecules and are
collected on subsequent passes. The efficiency of polarized-media
electronic air cleaners increases as they load, providing
high-efficiency filtration, with air resistance typically equal to
or less than passive filters. Polarized-media technology is
non-ionizing, which means no ozone is produced.
- Photocatalytic oxidation (PCO) is an emerging technology in the
HVAC industry.In addition to the prospect of Indoor Air Quality
(IAQ) benefits, it has the added potential for limiting the
introduction of unconditioned air to the building space, thereby
presenting an opportunity to achieve energy savings over previous
prescriptive designs. As of May 2009 there was no more disputable
concern raised by the Lawrence Berkeley National Laboratory data
that PCO may significantly increase the amount of formaldehyde in
real indoor environments.As with other advanced technologies, sound
engineering principles and practices should be employed by the HVAC
designer to ensure proper application of the technology. Photocatalytic oxidation systems are able to completely oxidize and degrade
organic contaminants. For example, Volatile Organic Compounds found
low concentrations within a few hundred ppmv or less are the most
likely to be completely oxidized.(PCO) uses short-wave ultraviolet light (UVC), commonly used for sterilization, to energize the catalyst (usually titanium dioxide (TiO2)) and
oxidize bacteria and viruses.PCO in-duct units can be mounted to an existing forced-air HVAC system. PCO is not a filtering technology, as it does not trap or
remove particles. It is sometimes coupled with other filtering
technologies for air purification. UV sterilization bulbs must be
replaced about once a year; manufacturers may require periodic
replacement as a condition of warranty. Photocatalytic Oxidation systems often have high commercial
costs.
A related technology relevant to air purification is
photoelectrochemical oxidation (PECO) Photoelectrochemical oxidation. While technically a type of PCO, PECO involves electrochemical
interactions among the catalyst material and reactive species
(e.g., through emplacement of cathodic materials) to improve
quantum efficiency; in this way, it is possible to use lower energy
UVA radiation as the light source and yet achieve improved
effectiveness.
- Ionizer purifiers use charged electrical surfaces or needles to generate electrically
charged air or gas ions. These ions attach to airborne particles which are then electrostatically attracted to a charged collector plate. This mechanism produces
trace amounts of ozone and other oxidants as by-products.[6] Most ionizers produce less than 0.05 ppm of ozone, an industrial safety standard. There are two major
subdivisions: the fanless ionizer and fan-based ionizer. Fanless
ionizers are noiseless and use little power, but are less efficient
at air purification. Fan-based ionizers clean and distribute air
much faster. Permanently mounted home and industrial ionizer
purifiers are called electrostatic precipitators.
- Immobilized cell technology removes microfine particulate matter from the air by attracting
charged particulates to a bio-reactive mass, or bioreactor, which
enzymatically renders them inert.
- Ozone generators are designed to produce ozone, and are sometimes sold as whole
house air cleaners. Unlike ionizers, ozone generators are intended
to produce significant amounts of ozone, a strong oxidant gas which can oxidize many other chemicals. The only safe use of
ozone generators is in unoccupied rooms, utilising "shock
treatment" commercial ozone generators that produce over 3000 mg of
ozone per hour. Restoration contractors use these types of ozone
generators to remove smoke odors after fire damage, musty smells
after flooding, mold (including toxic molds), and the stench caused by decaying flesh which cannot be removed
by bleach or anything else except for ozone. However, it is not
healthy to breathe ozone gas, and one should use extreme caution
when buying a room air purifier that also produces ozone.
- Titanium dioxide (TiO2) technology - nanoparticles of TiO2, together with calcium carbonate to neutralize any acidic gasses that may be adsorbed, is mixed into slightly porous paint. Photocatalysis initiates the decomposition of airborne contaminants at the
surface.
model | HXK-618/13 |
manufacturer | Tailian |
power | 0-15kw |
flow rate | 618m3/h |
working pressure | 1.3mpa |
absorption time | 8 h |
suction tempt. | 12℃ |