sequencing, chemical strength, and thermal
performance. The multiuse CIP system
may contain tanks for chemical and water
recovery, with an associated single pump,
re-circulating pipe work, and heat exchanger.
The plate heat exchanger heats the incoming
water and cleaning liquid to the required tem-
perature. Flexibility of temperature control,
optimal utilization of tank capacity, and flex-
ibility in heating of water or cleaning solu-
tions can be realized through the use of a heat
exchanger.
An automatic multiuse CIP system follows
the following operation sequence:
1.Prerinse. This step occurs from water
recovery or the water supply provided
at the desired temperature. The solu-
tion from this operation can be directed
to the drain or diverted by a recircula-
tory loop for a timed period, then
transferred to the drain.
2.Cleaning solution recirculation. The re-
circulation step occurs by the cleaning
compound vessel or the bypass loop.
A desired combination of cleaning
chemicals can be used for variable recir-
culation times, and the chemical injec-
tion can boost the strength or use of the
solution. The plate heat exchanger or
its bypass loop can contribute to the
cleaning solution recirculation. With a
bypass loop, variable-temperature pro-
gramming permits total detergent tank
heating. Cleaning solutions can be
recovered or drained.
3.Intermediate rinse. This operation is
similar to the prerinse, except that it
is important to remove residual clean-
ing chemicals from the previous opera-
tion.
4.Acid recirculation. This optional opera-
tion, which is similar to the cleaning
recirculation operation, may occur with
or without an acid tank. With an acidtank, the recirculatory loop is estab-
lished on water, either through the plate
heat exchanger or via the plate heat
exchanger bypass loop. The acid is
injected to a preset strength based on
timing for a specific circuit volume.
5.Sanitizer recirculation. This operation,
designed to reduce microbial contami-
nation, is similar to the acid injection
operation except that heating is not
normally required.
6.Hot water sterilization. Variable times
and temperatures are available for this
operation, which involves use of a re-
circulation loop on fresh water via the
plate heat exchanger. The spent water
can be either returned to water recovery
or drained.
7.Final water rinse. Water is pumped via
the CIP route and sent to water recov-
ery. Water rinse times and temperatures
are variable.
The desirable features of CIP equipment
are:
●Reduced labor. Manual cleaning is
reduced because the CIP system auto-
matically cleans equipment and storage
utensils. This feature becomes increas-
ingly important as wages increase and it
becomes more difficult to locate depend-
able workers.
●Improved sanitation. Automated opera-
tion cleans and sanitizes more effectively
and consistently. Through timed or
computer-controlled equipment, clean-
ing and sanitizing operations are more
precisely controlled.
●Conservation of cleaning solution. Opti-
mal use of water, cleaning compounds,
and sanitizers is possible through auto-
matic metering and reuse.
●Improved equipment and storage utiliza-
tion. With automated cleaning, equip-
ment, tanks, and pipelines, can beSanitation Equipment 207