Chemical Engineering September 2010 - 30

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first-principles mathematical model
that relates the moisture of product
exiting the dryer to the temperature
drop of hot air (after contact with the
product and the drying rate), the instrument
provides a 30% advantage
or more in reducing moisture variation
compared to conventional means
of moisture control.
The control system adjusts the
dryer to stay near a target moisture
content (as determined by laboratory
samples or process set points) in response
to changes in the feedrate or
moisture level of the feed. Since the
dual-temperature-sensor instrument
can survive the harsh environment of
the dryer, it can operate without the
time delays required of conventional
sensors that work outside the dryer.
It can be used on belt, flash, spray,
fluidized-bed and rotary dryers. The
system can reduce energy costs by 7
to 10% and can help avoid underdried
product material. - Oct. 20, 3:30 PM
A non-invasive density and
viscosity measurement device
A new non-invasive, percussion-based
device for measuring the density of
process liquids and loose solids is
mounted on the outside of tanks, storage
vessels and pipes.
The apparatus consists of a striker
and receiver module, which is mounted
on process equipment, and a data processing
unit. The striker/receiver generates
vibrations by making contact
with the exterior of the vessel and collects
vibration information on the interactions
between the vessel wall and
the content material. The data processor
applies mathematical algorithms
to the resulting vibration patterns and
calculates density and viscosity.
The software-driven technology allows
non-invasive and non-radiometric
measurements of density and viscosity
regardless of vessel geometry or
material, says Alexander Raykhman,
a co-inventor of the technology, which
is being commercialized by Ultimo
Measurement LLC (Providence, R.I.;
www.ultimompd.com). The instrument
is expected be available commercially
before the end of 2010. -
Oct. 20, 3:30 PM
A phosphogypsum-free
route to P2O5
A new process has been designed to
offer a more energy-efficient and environmentally
benign approach to
making phosphorous pentoxide (P2O5)
from phosporite (phosphate rock).
In a direct reaction between an
acid gas, such as SO3 and calcium
phosphate, P2O5 is liberated from the
phosphate rock and calcium sulfate is
formed. The calcium sulfate is further
heated to produce lime and sulfur oxides.
" P2O5
can be recovered as phosphoric
acid at desired concentrations
without having to go through the
phosphoric acid step, " says process
MONITOR VISCOSITY SIMPLY
SENSE MIXER MOTOR HORSEPOWER
WITH UNIVERSAL POWER CELL
EASY INSTALLATION
      
    
VERSATILE
      
   
        
     
SENSITIVE
     
  
CONVENIENT OUTPUTS
    
   
PROFILING A PROCESS
      
          
 
24
22
20
18
16
14
12
10
8
6
4
2
BATCH 1
BATCH 2
BATCH 3
POWER DECREASE
SHOWS BATCH
IS DONE
POWER
SENSOR
DRY MIX
HIGH SPEED
ADD LIQUID
LOW SPEED
MIXER
MOTOR
BEGIN HIGH
SPEED MIX
CALL NOW FOR YOUR FREE 30-DAY TRIAL 888-600-3247
WWW.LOADCONTROLS.COM
Circle 20 on p. 62 or go to adlinks.che.com/29254-20
24D-6 CHEMICAL ENGINEERING WWW.CHE.COM SEPTEMBER 2010
http://www.ultimompd.com http://WWW.LOADCONTROLS.COM http://adlinks.che.com/29254-20 http://WWW.CHE.COM
Chemical Engineering September 2010

Table of Contents for the Digital Edition of Chemical Engineering September 2010
