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[deltaChe]

Dear all Professinal engineers

I am sorry to bother you this trivial question. I tryied to establish procedures of purging and draining of batch reactor after last batch.

The procesure is following ( and drawing is atttached)

* The Reactor ready to purge( but I am not sure DO I HAVE TO ISOLATE THIS REACTOR CAUSE IT HAS MANY INLET VALVES)

* Open XV-01.

* Open HV-02 100% ( not sure why do I have to put this recirculation valve fully open)

* Close XV-10 and XV-11 (transfering line to the next vessel for treatment)

* Switch PIC-75 to automatic mode at 1.5 barg.

* Open XV-76 and XV-75 (nitrogen to Reactor)

* Wait PIC-75 reaches 1.5 barg, switch it to manual (close PV-75)

* treatment vessel is in vacuum: open XV-26 and XV-23 (vacuum to Vessel, I wonder if put this vessel in much higher vaccum, do we can get more stuff from reactor?)

* Wait until PIC-26 reaches 650 mbara and close XV-26 and XV-23

* Open XV-10 and XV-11

* Open XV-21(post-treatment inlet)

* Observe the increase in post-treatment vessel pressure (PIT-01) until it reaches 1.05 barg

* Open XV-26 and XV-27 (treatment Vessel vent to scrubber)

* Wait Reactor pressure PI-07. PV be less than 0.2 barg

Repeat the last 10 steps twice.

* Close XV-11 and XV-10

* Pressurize Reactor: Switch PIC-75 to automatic mode at 1.0 barg.

* treatment vessel in vacuum: open XV-26 and XV-23 (vacuum to Vessel)

* Wait until PIC-26 reaches 650 mbara and close XV-26 and XV-23

* Open XV-A (drain)

* Open XV-B (drain)

* Open XV-11 and XV-21

* Wait Reactor pressure PI-007. PV be less than 0.2 barg



Repeat two times

* Close XV-76 and XV-75 (nitrogen to Reactor) ( I wonder do I have to CLOSE ALL VALVE THAT OPEN BEFORE?)

* Panel operator shall open XV-C (ODR,organic drain) and request field operator to check Reactor drainage

* Panel operator shall open XV-E (EDR,effluent drain) and request field operator to check Reactor drainage

* Field operator shall confirm the Reactor is empty


I am sorry to put the flow diagram in this ms. painter (there is no MS. software installed in the PC I used)

Thank you very much for your kindly help and advice.

Attached Files

•  test.JPG   42.4KB   9 downloads

[deltaChe]

Please forgive me. I forgot to put "heat exchager" beside the graph of the discharge side of the pump.