Multi-Cyclone Dust Collectors

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					Multi-Cyclone Dust Collectors
                           CLArAge MuLti-CyCLone
                           MeCHAniCAL CoLLeCtorS
                           E    xperience makes the difference.        Practical uses for Clarage collectors
 Half a Century of              Clarage has been in business           range from helping a system meet its
                           since 1874, dedicated to the design         required air quality emission levels,
 Design and Experience
                           and fabrication of fans since 1912          to extending the life of the system
                           and mechanical multi-cyclone dust           ID Fan and connecting ductwork.
 Designed and Fabricated   collectors since 1940. When Clarage         Specific applications Clarage has
 to Meet Customer Needs    collectors were first introduced, it        supplied collectors for include:
                           was under the name of the Fly Ash               Oil
                           Arrestor Corporation. In the late
                           1960’s, the name changed to Zurn                Rockwool
                           Air Systems Division, and in 1997               Bagasse
                           our current name, Clarage was                   Lime dust
                           introduced. Although the name
                                                                           Glass beads
                           has changed, Clarage still
                           manufactures mechanical collector               Sludge
                           equipment that has established                  Coke calciner
                           one of the best known and widely                Sulfur dust
                           respected reputations in the world.
                                                                           Sinter dust
                           There are thousands of Clarage collec-          Feldspar
                           tors installed in the United States and
                                                                           Clinker cooler dust
                           around the world. Clarage's experi-
                           ence, capability, and extensive installa-       Iron ore pellets/dust
                           tion list has been built up over decades        Kalor dust
                           of dedication and resourcefulness.              Rice hulls
                                                                           Petroleum coke
                                                                           Wood waste/bark (various types)
                                                                           Coal (various types)
                                                                           Miscellaneous refuse
                                                                       Unmatched experience along with
                                                                       flexible engineering and the capabil-
                                                                       ity of altering conventional designs to
                                                                       meet specific customer needs, makes
                                                                       Clarage the best choice for mechanical
Clarage Collectors
the Multi-Cyclone                          the centrifugal force applied to the
Mechanical Collector                       dust particles increases as the tube
                                           diameter decreases. Three other
A collector consists of a housing
                                           major design factors also significantly
containing a quantity of collecting
                                           affect collection efficiency, namely
tube assemblies, each an individual
                                           proper gas distribution, draft loss, and
centrifugal dust collector. As illus-
                                           particle size/specific gravity. Clarage
trated, dust laden gas enters the top of
                                           engineering is available for assistance
the collecting tube through the inlet
                                           in determining tube size.
guide vanes. These vanes impart a
smooth, fast spiral to the gas, setting    Standard (StD) and
up a highly centrifugal action with a      totally Accessible
minimum of turbulence and erosion.         (tA) Mechanical
As the gas descends in a cyclonic pat-     Collectors
tern, the dust is forced by centrifugal    Clarage collectors are designed and
action against the wall of the collect-    fabricated to meet the customers
ing tube and gravitates to the bottom      needs. The two types available are
where it is discharged through the         Standard (STD) and Totally
dust discharge boot. A vortex forms at     Accessible (TA).
the bottom of the collecting tube and
                                           The collecting tube assemblies for
the cleaned gas makes an inner whirl
                                           both the STD and the TA collectors
up into the outlet tube. Optional outlet
                                           are identical. The differences between
recovery vanes help straighten the gas
                                           the STD and the TA collector are
flow to reduce draft loss.
                                           in the design of the housings and
Careful attention to housing design        outlet tubes.
details such as inlet and outlet pro-
portions, collecting tube spacing, and
dust discharge boot design assures
uniform gas distribution and proper
flow to each individual collecting tube
for maximum design efficiency.
tube Diameters and
Clarage collectors are available with
6", 9" and 11.5" diameter collection
tubes. Theoretically, high-collection
efficiencies are achieved with the
smaller 6" or 9" diameter tubes, since
                                                                                      Operation of collecting tube assembly.
                         StAnDArD DeSign CoLLeCtor

                                    T    he STD design collector is most commonly used
                                         in smaller industrial applications. The greatest
                                    advantage of the STD collector is its compact design that
                                    can easily accommodate space limitations. Additional
                                    advantages of the STD collector design can be realized
                                    through cost reduction in insulation and lagging area,
                                    as well as a smaller support structure.

                         Standard Collector                         The mounting flange at the top of the
                         Features:                                  collecting tube is an integral part of
                                                                    the casting. Four studs provide secure,
                         Available in Three Tube Sizes
                                                                    gas-tight mounting.
                         Collecting tubes in 6", 9" and 11.5"
                         diameters available to meet individual     Replaceable Dust Discharge Boots
Standard Design          requirements.                              Sturdy cast iron boots are at the
                                                                    base of the collecting tubes where
Collector                Heavy-Duty Construction
                         All components are designed for rug-
                                                                    the greatest wear occurs. Each boot
                                                                    bolts in place for quick, economical
 …when space is a        ged service by an experienced collector
                                                                    replacement compared to more costly
 premium.                team totally familiar with collector
                                                                    tube designs which utilize an integral
                         operation. Each application is individ-
                                                                    tube bottom.
                         ually evaluated based on the severity of
                         service and previous field experience.     Access Doors
Totally Accessible       Completely Shop-Assembled
                                                                    This feature is constructed of heavy

Design Collector         All collectors are custom-fabricated
                         and completely assembled to the extent
                                                                    duty cast iron with quick open design,
                                                                    that requires no special tools to open.
 …when total access is                                              These doors can be located in any
                         practical for shipment. This results
 required.                                                          direction. Special configuration such
                         in minimum erection man-hours and
                                                                    as our “Double-Doors” can be incor-
                         handling at the installation site.
                                                                    porated at the customers request.
                         Cast Collecting Tubes
                                                                    Warning signs and safety chains
                         Special cast tubes give uniform wall
                                                                    are always standard components of
                         thickness and maximum Brinell
                                                                    Clarage Collector Access Doors.
                         hardness for prolonged service-life.
Clarage Collectors
totALLy ACCeSSibLe DeSign CoLLeCtor

T     he TA collector offers three basic differences to
      conventional standard collector designs. These
result in significant improvements in collector wear-
resistance and maintenance. These differences are:
  • Grouped collecting tubes with inlet access corridors
  • Separate outlet plenums for tube groupings
  • Equal length outlet tubes
The inlet access is such that every tube is within easy
reach and view. Normal design provides that no tube
is more than one tube away from the access corridor,
making it totally accessible.

totally Accessible                        narrow arrangements possible for
Collector Features:                       substantial duct savings. The unique
                                          TA design also allows flexibility in         oPtionAL StD AnD tA
Totally Accessible Collectors have                                                      DeSign FeAtureS
                                          inlet and outlet arrangements.
all of the features of the Standard
                                                                                         Hopper Evacuation Systems
Collector, and the following additional   Elimination of Hopper
features:                                 Recirculation
                                          The TA collector does not have dif-             Inlet/Outlet Arrangements
Totally Accessible
                                          ferential pressure in the hopper, there-
The accessibility is available through                                                        Damper Control for
                                          by eliminating the problem of hopper
access doors provided at both inlet
                                          recirculation.                                 Increased Collector Flexibility
and outlet locations for inspection,
cleaning and maintenance as required.     Balance Flow To All Tubes                          • Sectionalizing
                                          The plenum hooded design eliminates                • By-Pass
Lower Velocities
                                          obstruction in the gas stream as the gas           • Isolation
Lower velocities significantly reduce
                                          travels through the collector assembly.
the wear of the tube assembly compo-
                                          This non-obstructive feature allows
nents. Entering gases/particulate
                                          for no inlet static pressure differential,
utilize the access corridors, therefore
                                          and provides low-velocity/low-pressure
do not cause abrasion while passing
                                          drop gas flow to every tube.
through the array of gas outlet tubes,
which is common to conventional
Flexible Arrangement
TA collectors, with no inlet static
pressure differential, make long and
                                                                                  your SingLe SourCe For ALL
                                                                                  CoLLeCtor rePLACeMent PArtS
             Cut-away View of the
             Inlet Tube Assembly
                                                                                  C     larage’s expertise certainly does
                                                                                        not end with the design and
                                                                                  fabrication of our own collectors.
                                                                                                                             Cast inlet Collecting
                                                                                                                             tubes With integral
                                                                                                                             Mounting Flange
                                                                                  One Clarage's greatest strengths has
                                                                                                                             Clarage collecting tubes (1) are
                                                                                  been, and continues to be, the ability
                                                                                                                             constructed of cast iron with an alloy
                                                                                  to repair, modify, or replace other
                                                                                                                             additive to yield a higher Brinell
                                                                                  manufacturer’s collectors. Replacing
                               (10) TOP TUBE SHEET                                                                           hardness.
                               (Sloped in Standard Collectors)                    obsolete equipment produced by
                                                                                  companies like Western, Joy, UOP,          A mounting flange is cast at the top
                                                                                  etc. is routine and common practice        of the collecting tube, which holds the
(6) OUTLET TUBE                                                                   at Clarage. Engineering flexibility, in    entire assembly to the bottom tube
(Constant length for Totally
Accessible Collectors;                                           (2) BOTTOM       most cases, allows Clarage to match        sheet (2). A permanent airtight seal
variable length for                                                  TUBE SHEET
Standard Collectors)                                                              existing collector dimensions exactly.     (high temp. gasket) (3) is required to
                                                                                  This results in lower replacement          prevent gas from escaping around
                                                                                  costs, through fewer modifications to      the tube directly into the hopper.
                                                                                  the surrounding structures.                A 3/8-inch lip extends above the
                                                                                                                             integral flange to extend through the
                                                                                  Even when only replacement tubes
(3) SEAL                                                         (4) STUD                                                    tube sheet into the inlet. The flange
(Airtight)                                                                        are required, Clarage is the logical
                                                                                                                             is sealed to the tube sheet with four
                                                                                  choice. Most competitor tube assem-
                                                                                                                             studs (4) to retain the initial tight-seal
                                                                                  bly designs (obsolete and current),
(5) INLET                                                        (9) OPTIONAL                                                even under severe service.
                                                                                  can be easily substituted with one
                                                                     VANES        of Clarage’s available tube sizes.
                                                                                  Over the years, the 9" inlet tube has
                                                                                  become the most universally used
                                                                                  tube size for Mechanical Collectors.
                                                                                  Clarage offers this size, and is able to
                                                                 (1) CAST INLET
(8) BOOT                                                             COLLECTING   adapt it to any collector design which
    STRAP                                                            TUBE
                                                                                  uses the 9" tube. This ability, along
                                                                                  with an always adequately stocked
                                                                                  supply of collector parts, makes
                                                                                  Clarage the best choice.
                                                                                  Whether it’s a single part or the entire
                                                                                  unit, Clarage has your mechanical col-
(7) DUST
    DISCHARGE                                                                     lector replacement part needs covered.
Clarage Collectors
inlet guide vanes                               reversal of the gas at the tube bottom.

The inlet guide vanes (5) are separately        outlet recovery                            The unique design of the
cast and are held in place by support           vanes                                       discharge boot means
on the gas outlet tube (6). They fit            Recovery vanes (9) are used at the           low cost replacement
securely in place inside the collecting         lower end of the gas outlet tube in             with improved
tube keeping the outlet tube centered.          certain applications. These vanes are
Inlet guide vanes are designed to give                                                        operating efficiency.
                                                used to recover the rotational energy
the gas maximum centrifugal action              of the exiting gas, thereby increasing
on its spiraling path down the tube             the total capacity of each collecting
toward the dust discharge boot (7).             tube. Recovery vanes are not recom-
Inlet guide vanes are replaceable by            mended where the incoming gas has
splitting them in half. Each vane has           a characteristic, such as heavy oil
two notches for this purpose.                   or bark-fired combinations. Outlet
Dust Discharge boot                             recovery vanes have the efficiency
                                                benefits of permitting a smaller
The cast-iron dust discharge boot is            collector for a given gas flow.
retained at the lower end of the col-
lecting tube by two boot straps (8).            outlet tubes
The boot straps in turn are bolted in           Outlet tubes are held in place at the
place at the top of the collecting tube         lower end by the inlet guide vane
with two of the studs used to con-              and welded at the top to the top
nect the assembly to the bottom tube            tube sheet (10). Their purpose is to
sheets. Since the boot is subject to            deliver the cleaned gas from the col-
the greatest wear, it has been designed         lecting tubes to the outlet chamber.
for easy replacement. This design               The abrasive gases on the outside of
allows greater cost savings than                these tubes cause greater wear than
replacement of the entire collecting            from the inside. Both steel and high-
tube, as with competitive designs hav-          Brinell cast outlet tubes are available.
ing the boot and tube as an integral
assembly. The dust discharge boot has
three peripheral slots where collected
dust is discharged by inertial and
centrifugal force out of the tube,
immediately prior to the vortex

                    Example of “STD” Type collector modified to
                    incorporate “TA” Type structural supports, and
                    angle iron wear shields on the front row of
                    outlet tubes.
      ProDuCtS AnD ServiCeS

Standard                                Axial Fans                          Services
Centrifugal Fans                          Jet Fans                              Repair and Rebuild
     Backward Curved
                                          Tubeaxial                             Field Service
     Backward Inclined
                                          Vaneaxial                             Upgrade Engineering
     Pressure Blower                                                              • Performance
                                          Fixed Pitch
     Industrial Exhauster — Radial/                                               • Material Construction
     Paddle Wheel                         Adjustable Pitch — In Motion
                                                                                Quality Fabrication
     Cast Iron Exhauster                  Adjustable Pitch — At Rest
                                                                                Erection and Start-up
Custom                                  Multi-Cyclone                           Testing Services
Centrifugal Fans                        Dust Collectors
     Airfoil                              6", 9" and 11.5" Tube                 Turnkey Services
     Backward Curved
                                          Standard (STD) and Totally (TA)
     Backward Inclined
                                          Accessible Designs
     Radial Tip

     Straight Radial

     Forward Curved

     Hi-Boost — 2-Stage
     Pressure Blowers

     All Drive Arrangements

     SWSI and DWDI Selections

     Inlet Boxes

     Sleeve or Anti-friction Bearings

     Volume Control Dampers                                 5959 trenton Lane
                                                        Minneapolis, Mn 55442
     High Temperature Fans
                                         24-Hour emergency Service Hotline
     Special Materials                                       800-598-9234
                                                           Phone 763-551-7600
                                                             Fax 763-551-7601                   ISO 9001
5030 - June 2003                                  

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