00:00:02.110 let's first look at this animation of a 00:00:05.26000:00:05.270 triple effect evaporator we have steam 00:00:08.74000:00:08.750 coming in and entering the first effect 00:00:11.74000:00:11.750 and the condensate leaves at the bottom 00:00:14.79900:00:14.809 of the heating section the raw juice is 00:00:18.81000:00:18.820 entering from the bottom and it rises in 00:00:22.90000:00:22.910 those tubes as it heats to the top where 00:00:27.13000:00:27.140 some of the liquid turns into vapor and 00:00:30.49000:00:30.500 the other concentrated liquid then moves 00:00:33.96900:00:33.979 down the vapors leave the first effect 00:00:38.25900:00:38.269 and rather than discharging them into 00:00:40.66000:00:40.670 the atmosphere those vapors then enter 00:00:44.41000:00:44.420 the second effect as the heating medium 00:00:48.00900:00:48.019 note that the heating medium in the 00:00:50.70900:00:50.719 first effect was steam and now for the 00:00:53.88900:00:53.899 second effect the heating medium is the 00:00:56.19900:00:56.209 vapor that is coming from the first 00:00:59.85900:00:59.869 effect those vapors will then condense 00:01:02.97900:01:02.989 in the heating section and they will 00:01:05.92000:01:05.930 leave as condensate now the concentrated 00:01:09.16000:01:09.170 stream from the first effect is then fed 00:01:13.24000:01:13.250 into the second effect at the bottom of 00:01:15.67000:01:15.680 the heating section and it rises through 00:01:20.05000:01:20.060 the heating section to the top again 00:01:23.17000:01:23.180 more vapors will come out of the liquid 00:01:26.89000:01:26.900 stream and those vapors from the second 00:01:31.57000:01:31.580 effect are then passed into the third 00:01:34.63000:01:34.640 effect as the heating medium where they 00:01:38.68000:01:38.690 will discharge their heat and the 00:01:41.80000:01:41.810 condensate will leave at the bottom of 00:01:44.32000:01:44.330 the heating section the concentrated 00:01:47.67000:01:47.680 liquid from the second effect is then 00:01:51.58000:01:51.590 fed into the third effect at the bottom 00:01:56.05000:01:56.060 of the heating section and again more 00:01:58.93000:01:58.940 vapors will come out at the top which 00:02:02.41000:02:02.420 are then discharged into the atmosphere 00:02:04.36000:02:04.370 and the concentrated product stream 00:02:08.21900:02:08.229 leaves on the right-hand side from the 00:02:12.48900:02:12.499 third effect so in a triple of 00:02:15.50000:02:15.510 evaporator steam comes in and enters 00:02:19.69900:02:19.709 only the first effect and then for the 00:02:22.78900:02:22.799 second and third effect heating is done 00:02:26.18000:02:26.190 by the vapors that are being discharged 00:02:30.94900:02:30.959 from the previous effects of course the 00:02:35.30000:02:35.310 vacuum inside these chambers will be 00:02:40.22000:02:40.230 maintained at appropriate levels so that 00:02:44.15000:02:44.160 the liquid streams in those effects can 00:02:48.40000:02:48.410 appropriately boil and discharge vapors 00:02:52.40000:02:52.410 so note that the boiling temperature in 00:02:57.58900:02:57.599 each of these effects is different and 00:03:00.77000:03:00.780 that boiling temperature is maintained 00:03:05.11900:03:05.129 by using different levels of vacuum in 00:03:09.25000:03:09.260 each of these effects
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