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| Quenchers, Saturators
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| Characteristic
Features |
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- self-aspirating
- suitable for
temperatures of up to 1200° C (special designs for higher temperatures
available)
- co-current flow
operation
- permit large flow rate
variations
- no pressure
drop
- resistant to clogging
and incrustations
- can be integrated with
piping
- compact
dimensions
- cost-efficient
- version without
internal components available
- can be combined with
an absorber
- permit high
particulate loadings
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| Range of
Application |
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- direct contact gas
cooling
- saturation,
pre-saturation
- combination of
cooling, absorption, and dust abatement
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| Monitoring Techniques
Triggering the Emergency Cooling |
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For material
(corrosion) and cost-related reasons, usually quenchers are not entirely made
of temperature-resistant metal materials. Material options are mostly
restricted to Hastelloy types or expensive exotic types, such as
Tantal.
Quenching systems consisting e.
g. of FRP or rubber-lined steel may be threatened if the supplied liquid
quantity is too low (blockage, pump defect) or too high (worn-out or torn-off
nozzles), causing an unacceptable temperature rise and, thus, damaging the
quencher. For this reason, the quenching system needs to be monitored. The
following options exist and are employed as applicable for specific
applications:
- controlling all
nozzles individually with a flow control instrument (FZA +/-)
- controlling the
partial flow required for cooling (FIZA +/-)
- controlling total
volume flow (FIZA +/-)
- controlling the
current consumption of the pump motor (EIZA +/-)
- controlling gas
temperature (TIZA +/-)
Critical cases require
a combination of several control options. Along with your quenching system, VUM
provides individual advice and the optimal monitoring system. There is also a
monitoring system available to insure the emergency water supply. The picture
shows a quencher collecting emissions from a process off-gas incinerator. Apart
from the control of the entire volume flow, the operation of the relevant
process nozzles is insured through individual controls detecting quantity
deficits. This system represents an optimal concept for medium-sized designs
(see picture). |
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