Rau Titanium Tube Bundle rhaub hauv 15% Aluminium Sulfate (Alum) Kev daws ntawm 70 degree, Dab tsi yog qhov tseem ceeb ntawm Aluminium Hydroxide Scale Thickness uas ua rau 50% txo cov cua sov ua haujlwm?

Scale ntawm aluminium hydroxide (Al (OH) 3) yog precipitated rau rhuab titanium nto nyob rau hauv 15% txhuas sulphate (alum) ntawm 70 degree. Cov nplai muaj cov thermal conductivity tsawg (0.2-0.4W / mK vs 21.9W / mK rau titanium). Ib qho tseem ceeb scale thickness ntawm 0.5 hli ua rau 50% txo nyob rau hauv tshav kub hloov efficiency, yuav tsum tau 2 × nce nyob rau hauv lub sij hawm cua sov los yog lub hwj chim noj.

Quantitative Txo cov cua sov hloov nrog Scale Thickness

Qib 2 Ti, 15% Al2 (SO4) 3, 70℃Kub flux 20 W / cm2:

Scale Thickness (mm) Ntxiv Thermal Resistance (m2.K/W) Thaum tshav kub kub hloov Reduction (%) Hwj chim nce
0.

Lub sij hawm (teev) Scale Thickness (mm) Thaum tshav kub kub hloov Reduction (%) 100 0.05-0.10 5-15% 500 0.15-0.30 20-45% 1,000 0.25-0.50 35-65% 2,000 0.40-0.80 50-80%
Scale Management Guide

Scale Thickness (mm) Kev txo qis hauv kev hloov pauv cua sovSugested Action zaus ntawm kev ntxuav<0.1 <15%Annual 0.1-0.2 15-30% NoneMonitor Quarterly 0.2-0.5 30-60%Clean Now Monthly >0.5 >60% Tseem Ceeb Ntxuav Tam Sim No Txhua Lub Limtiam Kev Pom Zoo Engineering

Clean heater for aluminium sulphate service when scale thickness is 0.3 mm to avoid >50% tshav kub kis tau tus mob. Al(OH)₃ Scale Dissolve hauv 5% hydrochloric acid ntawm 50ºC rau 30 feeb. Tus engineer ntsuas lub thickness ntawm lub teev kom lub tshav kub hloov mus tau zoo.