paraffin wax deposition and fouling

The calibrations o the tesperature controllers are given
The coriea temperature setting couid cc adjusted wz.ta zne
r. Denca::
acted as sensing devicos
sent.. rnerastcrs piacca an the tanks of the circulataon system
Thistors. They were ra&e in the electronic workshop of ;he depart—
The kW to erature controllers were ciescribud az cre:canl
care ‘,:as au:-an an r-an.. :orcocrcs to aana:..aze ane
rrcc.an. of ;anw. e::;ra war ro an.ave aewosats an anna..
-_;e c :cs_tacn sc.as a aratus was aesagaca wa:.
the still colder ‘an argace giving rise to further cepositica.
worse by the fact that the sdlltion would be irainea alcwhy cer
&ura: eratacn sac. ocsctre tac true ao:osit. wnas wownc ce
a film o± solution would adhere to tao wax doitod
was that. when the ckcosition duct :c. to be drainec after an
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:terience had shown that it might ‘cc dffffcult to obtain
_...z_.
rara an .cerosene cor detaa_s see Lppcnc.ix 1
wax was also used.. This was a 57/50°C meting point ‘ully redined
however, a saluticn containing a higher melting point paraffin
poznt Iuy re:anea para::an wax an ccrosene.
as in the fou±ing stuc.ies.. This was a solutaon 01 51/54°C seitang
:n the c.arosition work the same exterircental solution was used
53 Z: rimearn Soluticus
were kett at maxi:.;um..
The controllers had sensitivity dials which at all tir.es
reteatec. ursts, the duration o which could be adjusted
ana coarse chans.. The controllers turned the 1kw heater on in short
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