Industrial Wet Particulate Scrubbers

Babcock & Wilcox Power Genera- lution control products, replace- PGG’s environmental equipment
tion Group, Inc. (B&W PGG) is the ment parts, and upgrade systems product portfolio are wet particu-
original equipment manufacturer formerly offered by Western Pre- late scrubbers for a wide variety of
and supplier of standard air pol- cipitation (WP). Included in B&W industrial applications.

Scrubber Model Features Benefits Applications

Type D Turbulaire® Turbulent sump design Eliminates solid buildup Asphalt dryers
with higher slurry Bagasse boilers
concentrations Dissolving tanks
Hog fuel boilers
Vertical flow design Minimizes floor space
Petroleum coke coolers
Low energy input Reduces operating Pulverized coal boilers
horsepower Rock dryers
Sugar dryers
Adjustable peripheral Can accommodate Urea prill towers
nozzle changes in process
conditions

Type V Turbulaire® Flooded venturi section High collection efficiency Asphalt dryers
of submicron particles Dissolving tanks
Oil refineries
No spray nozzles Higher concentrations of Petroleum coke coolers
recirculating slurries

Completely wetted cone Eliminates wet-dry inter-

face and dust buildup

Adjustable throat venturi Can accommodate

changes in process
conditions
Flooded elbow Eliminates abrasion
problems

Type JM Microdyne Compact design Saves valuable space Coal dusts

Food processing
Low liquid-to-gas ratios Less process equipment
Tunnel and mine
required
ventilation
All parts are readily Easy maintenance
accessible
Type D Turbulaire ® energy inputs (scrubber pressure venturi scrubbers begin to take
scrubber drops less than 14 in. of water). full effect. Our Type D units often
Type D Turbulaire® scrubbers are These energy requirements are be- match the performance of venturi
used where dust particle sizing low the range in which the collect- scrubbers while saving 20 to 50
and process conditions require low ing mechanisms of conventional percent in operating horsepower.

The Type D model has a vertical

Type D Turbulaire ® scrubber flow design which requires minimal
floor space. The cylindrical configu-
ration improves rigidity with light
gauge unitized construction.

How it works
A patented peripheral gas nozzle
combines a low energy venturi
effect with collection by impinge-
ment on the liquid bath. This com-
bination provides optimum energy
utilization at low pressure drop.
See Figure 1.

To accommodate changes in pro-

cess conditions or more stringent
emission regulations, the unit is
designed to allow for variations
in pressure drop by means of a
simple internal adjustment of the
peripheral gas nozzle.

Slurries are kept in suspension in

the sump by the action of the gases
being scrubbed. Mist elimination is
accomplished with the centrifugal
action of a set of swirl vanes. Once
separated from the gas stream, the
droplets are returned by gravity
into the sump.

Water needs are kept to a minimum

by recirculating the heavily concen-
trated (up to 5% solids by weight)
slurries. The top gas outlet con-
figuration makes stack connection
simple; the flanged slurry drain can
Slurry Recycle Equipment be connected to settling tanks or
(typically by others)
piped for disposal with ease.
Equipment Specifications Available options:
Cylindrical, high efficiency, inertial-orifice type Support assembly The Type D Turbulaire scrubber
scrubber with radial inlet. Gas passes through a Discharge valve; cast iron or is simple and rugged, with no
peripheral nozzle and is jetted at high velocity into rubber lined
a static liquid bath, the level of which is main- Automatic water supply control moving parts and excellent non-
tained slightly below the bottom of the gas nozzle Manometer and fittings plugging characteristics. It can
by an adjustable weir. The weir box is equipped Pump and motor be constructed from a variety of
with a gas-lock release mechanism. After leaving Fan and motor
the liquid bath, the gas passes through a centrifu- corrosion-resistant metals as well
gal type spray eliminator and exits the scrubber as lightweight, low cost fiberglass
through the top vertical discharge. Figure 1 reinforced polyester (FRP).
Type V Turbulaire ® How it works ties in the area shear the liquid into
venturi scrubber Inlet gases are directed to the a fine, dense, turbulent mist. The
Type V Turbulaire® scrubbers are flooded venturi section through mist entraps the dust particles by
used in applications with sub- a dry inlet thimble, while liquid inertial impaction. The gas-mist
micron dust particles or when is introduced through a specially stream is then introduced into the
extremely high collection efficien- designed distribution shelf. In this separator chamber where the dust
cies are required. The vertical configuration, there is no wet-dry laden droplets are removed from
gas inlet design allows for water interface to cause dust build-up. The the gas stream and drained into
distribution without the use of inlet thimble directs the gases into the sump. Clean gases exit through
spray nozzles. Up to 10% solids the fully wetted throat area and the the outlet to the stack or fan.
concentration, by weight, can be liquid is distributed into a protec-
suspended in the recirculating tive layer which eliminates thermal The scrubbing liquid is recirculat-
slurry without pluggage or abra- shock and minimizes the abrasive ed in a typical bypass flow system
sion problems. In turn, heavier re- action of the dust. See Figure 2. where a small slip stream is drawn
circulating slurries mean reduced off to a settling tank, vacuum filter,
slip streams for disposal – and less As the liquid descends by gravity or other processor before disposal.
slurry to be processed. into the throat, the high gas veloci-

Type V Turbulaire® scrubber

Equipment Specifications
High energy type venturi scrubber;
liquid distribution without the use of
spray nozzles. Inlet thimble design
eliminates a wet-dry interface.
Throat is completely wetted and
adjustable, exhausting to a flooded
elbow to deter abrasion. Separator
has a 45 degree sloping conical
bottom with anti-swirl baffles, while
the discharge cone has a 30 degree
angle from vertical.

Available options:
Support assembly
Pump and motor
Fan and motor
Manometer and fittings
Slurry Recycle Equipment
(typically by others)
Figure 2
Microdyne scrubber can weigh more than 50,000 lb. A cles enter the mixer under suction
The compact Microdyne scrubber Microdyne scrubber of the same from the booster fan. Water sprays
can be part of the duct or ventila- rating weighs less than 3,000 lb. cover the impingement element
tion system, saving valuable space. through which the dust-laden air
Water rates seldom exceed 2 gal- must pass. As the air passes, the
lons per 1,000 cubic feet of gas dust particles are forced into the
Pressure drop through the scrub-
handled. If corrosion is a problem, water. See Figure 3.
ber is moderate, so power require-
ments for the optional booster fans Type 304 or 316 stainless steel or
are low. When necessary, an axial other metal alloys can be used. The eliminator imparts a strong
flow fan can be supplied to over- helical motion dynamically sepa-
come the pressure loss through the All parts are readily accessible for rating the entrained droplets from
scrubber, or a centrifugal fan can ease of maintenance. Efficiency the air stream, bringing them to
be supplied to power the entire on dust particles 5 microns and the surface of louvers, each of
system. Use of an in-line fan will larger is greater than 99%. Models which is a separate airtight elimi-
allow the dust collection system are available from 2,500 to 48,000 nation chamber.
to conform to the general shape of CFM.
the duct system. The slurry of dust and water drains
How it works from the louvers into a sump
The compactness of the Micro- beneath the dust collector and out
The Microdyne scrubber has three
dyne scrubber is unmatched. For to the sewer or slurry handling
main components: a mixer, an
example, a conventional 40,000 system.
eliminator, and an optional booster
cubic feet per minute scrubber fan. Air and entrained dust parti-

Microdyne scrubber

Equipment Specifications Available options:

Cylindrical, horizontally oriented, wet venturi screen- Fan
type scrubber. Gas is cleaned as it passes through Motor
a high efficiency wet venturi screen, then through Transition water interlock controls
Manometer and fittings
stationary turning vanes which impart a strong
centrifugal/helical motion to the gas. The swirling gas
deposits its moisture in the louvered eliminator before
exiting horizontally.
Figure 3
Scrubber application list by industry

B&W PGG’s industrial scrubbers are reducing air emissions in a variety of industries.

Asphalt Mining
Coal Non-ferrous metals
Combustion processes Non-metallic minerals
Fertilizers Organic chemicals
Inorganic chemicals Petrochemicals
Iron and steel Pulp and paper

A history of pollution
control solutions
B&W PGG provides a complete
line of environmental equipment,
upgrades, services and replace-
ment parts. In addition, we are the
original equipment manufacturer
of replacement parts, upgrade
systems and standard air pollution
control products formerly offered
by Western Precipitation and Joy
Environmental. For more informa-
tion on B&W PGG’s wet particulate
scrubbers for industrial applica-
tions, or any of our environmental
equipment, call 1-800-BABCOCK
(222-2625).
 www.babcock.com

Babcock & Wilcox Power Generation Group, Inc. Babcock & Wilcox Power Generation Group, Inc. is a subsidiary of
20 S. Van Buren Avenue The Babcock & Wilcox Company (B&W). Established in 1867, B&W is
Barberton, Ohio 44203 USA a world leader in providing steam generating and emissions control
Phone: 330.753.4511 equipment, nuclear operations and components, and defense program
Fax: 330.860.1886 management services.

The information contained herein is provided for general information For more information, or a complete listing of our sales and service
purposes only and is not intended nor to be construed as a warranty, an
offer, or any representation of contractual or other legal responsibility.
offices, call 1-800-BABCOCK (222-2625), send an e-mail to
info@babcock.com, or access our Web site at www.babcock.com.
Turbulaire is a trademark of Babcock & Wilcox Power Generation Group,
Inc.

© 2008 Babcock & Wilcox Power Generation Group, Inc.

All rights reserved.

PS-420 500DC8J