3
revised 03/15
SMoG-HoG
®
electronic air cleaner
support structure corners or the triangular insulators.
Inspect filters, noting the condition (contaminant build
up?, media separation?, bent frames?) should not
have contaminant build up restricting airflow, repair or
replace. Module drain sump should not have moderate
to extreme contaminant build up. Unicell module
support tracks should be free of contaminant build-up
for ground contact. Module and access doors gaskets
should be in-place and in good condition.
5.2 MANUAL CLEANING OF SMOG-HOG
COMPONENTS
There are a number of methods for manual cleaning,
certain key cleaning criteria contribute to the
effectiveness of every method. these include the type
of detergent, detergent strength, water temperature,
agitation/ impingement, duration, rinse procedure and
dry-out time.
TYPE OF DETERGENT
In general, the detergent used on most hydrocarbons
(e.g., oily residues) will be alkaline in nature. It is
extremely important that the detergent have a built-in
buffering agent to reduce aluminum deterioration.
DETERGENT STRENGTH
Detergent concentration in a mixture with water varies
with the application from 1:1 to 20:1 parts water to parts
detergent. For any contaminant condition, the best
course is to use a cleaning solution per the detergent
manufacturer’s directions. More or less detergent
may eventually be required for effective cleaning at
reasonable detergent cost. the recommended factory
detergent concentration is 5% (20:1).
WATER TEMPERATURE
Detergents can be up to twice as effective in hot water.
Hot water alone is very effective in softening built-up
residue. Water temperature should be 140°F to 170°F,
not to exceed 180°F.
AGITATION/IMPINGEMENT
These methods are virtually the same, with
impingement being the most extreme form of agitation.
any liquid movement over built-up residue will remove
a layer, allowing detergent to work on the next layer. A
reduction in cleaning time duration usually results.
CLEANING CYCLE DURATION
In most cleaning methods, adequate time should be
allowed for the detergent to remove the contaminant
thoroughly. reaction time will vary depending on
detergent strength, temperature and agitation.
Guidelines for mixing, heating and expected results are
included on specification sheets for most detergents.
!
C A U T I O N
Never mix caustic and alkaline detergents for
manual. Detergent mixing could cause rapid
heat release, gel formation or some other
undesirable condition.
time is necessary for effective cleaning. Soaking may
seem slower and less effective than high impingement
and/or hot water above 180°F for cleaning action, so
personnel should be forewarned about using excessive
pressure or temperature to shortcut the cleaning
process. High pressure or stream spray cleaning until
plate edges are shiny is not effective. not only will
penetration to the cell core not occur, but warping and
bending of the plates may result as well. Patience and
thoroughness of cleaning best preserve the integrity of
the components in the long term. Soaking and gentle
rinsing provides for best results.
RINSE PROCEDURE
cleaned components should be rinsed off quickly and
thoroughly to remove remaining contaminants. Some
detergent residue will remain if rinsing is not performed.
the residue may contribute to voltage bleed-down when
the unicell is placed in operation. Also, even though the
detergent is “buffered” prolonged contact could cause
minor corrosion. Hot water should be used for rinsing.
DRY-OUT TIME
unicells and filter media should be dry before the MSH
is placed into operation. Startup of a wet system will
cause dead short conditions to the ionizer and collector
cell circuits. Wet unicells and filter media should be
placed in a warm room for drying. techniques such as
hand wiping insulators and blow drying unicells and
filter media with compressed air will decrease drying
time.
5.3 MANUAL CLEANING METHODS
the manual cleaning method selected will depend
on the type of contaminant, rate of deposit, facility
limitations such as cleaning time windows (process
downtime) and available utilities. All cleaning methods
listed in this section are acceptable.
SOAK TANK
this method involves placing unicells and filter media
in an agitated solution of hot water and detergent and
is the most effective method. With proper detergent
selection, this procedure will quickly remove most
contaminants. unicells and filter media should not be
placed in highly concentrated detergent solutions or
allowed to soak for extended periods, (e.g., overnight),
especially at elevated temperatures. Extended soaking
(e.g., days) in solvent or detergent solution will
degrade components over time and should be avoided.
PORTABLE PRESSURE WASHER
a self-contained pressure washer with a spray wand
can be an effective cleaning method, providing it is
used with caution. Care should be taken not to expose
the unicells to close-up and prolonged blasts of high
pressure/temperature, causing cell plate deformity,
requiring a replacement set of unicells and filter media.
Summary of Contents for CLARCOR SMOG-HOG MSH Series
Page 1: ...Industrial Electrostatic Air Cleaner l SMOG HOG MSH Model OWNER S MANUAL ...
Page 14: ...10 Revised 03 15 SMOG HOG Electronic Air Cleaner Figure 1 Unit Components ...
Page 17: ...13 Revised 03 15 SMOG HOG Electronic Air Cleaner MSH 05 ...
Page 18: ...14 Revised 03 15 SMOG HOG Electronic Air Cleaner MSH 05 M ...
Page 19: ...15 Revised 03 15 SMOG HOG Electronic Air Cleaner MSH 11 ...
Page 20: ...16 Revised 03 15 SMOG HOG Electronic Air Cleaner MSH 11 M ...
Page 21: ...17 Revised 03 15 SMOG HOG Electronic Air Cleaner MSH 11 w Optional ON OFF Switch ...
