STBP Detail (Vessel CIP)

The smaller BLUE diagram illustrates all Rinse to Drain steps.  The larger ORANGE diagram illustrates the recirculation steps (by-passing the Water Tank) for chemical addition, heating, and alkaline or acid washes.  See scroll box below for additional information.

ClronBSlide12STBP_1

Normal (or Suggested) Sequence of Operation

  1. Control system confirmation of all interlocks and enabled conditions related to the selected circuit, including CIPS/R valves, vessel valves, etc.
  2. Water Tank Fill – The AWFI valve will be energized open and the level sensor will monitor tank level.  The tank will be filled to the high level and the valve will  close, allowing step advance.
  3. First Pre-Rinse – The TOV will open, admitting water to the CIPS pump.  Following a brief delay for water to fill the pump casing, the pump will start and as water passes the FE (Flow Element), (a) the flow control loop will adjust the pump speed to deliver the desired Gpm/Lpm and (b) a flow totalizing register will accumulate pulses representing the rinse volume  When the stored rinse volume setpoint is reached, the pump will stop.  When the LS senses a slightly lower level, the AWFI valve will open to keep the tank full, under LS control.  The water will move through the distribution piping to the sprays in the target vessel
  4. First Pre-Rinse Drain –  The rinse will be removed from the target vessel by the applicable motive force (gravity, Return Pump, Eductor vacuum, or combination of several) and return it to the CIP Skid via the distribution piping.  The water and product soil will be passed through the Drain Valve to the facility waste system.  The RET (Return Probe) will sense return flow and confirm the integrity of the CIP/R path, allowing step advance.  A suggested drain period is 1.5 times the delivery period.
  5. Second Pre-Rinse – This will be the same as the First Pre-Rinse except the setpoint volume will be smaller as the CIPS distribution piping is already full.
  6. Second Pre-Rinse Drain – This will be the same as the First Pre-Rinse Drain.
  7. Third Pre-Rinse – This will be the same as the First Pre-Rinse except the setpoint volume will be smaller as the CIPS distribution piping is already full.
  8. Third Pre-Rinse Drain – This will be the same as the First Pre-Rinse Drain.
  9. High Fill-Water TankCheck Level before initiating System Fill.
  10. System Fill – The DRAIN valve will close. The TOV will open, admitting water to the CIPS pump.  Following a brief delay for water to fill the pump casing, the pump will start and as water passes the FE (Flow Element), (a) the flow control loop will adjust the pump speed to deliver the desired Gpm/Lpm and (b) a flow totalizing register will accumulate pulses representing the System Fill volume  When the stored System Fill volume setpoint is reached, the TOV will close and the RETURN valve will open, allowing CIPR flow to continue to the CIPS pump and thence to the target vessel.
  11. Establish RecirculationA WAIT will occur for confirmation of Supply Pressure by the PS and Supply Flow by the FE.
  12. Heat and Alkali FeedSteam will be admitted to the HXR and the required amount of alkali will be introduced to the chemical feed slip stream by weight, volume or time.
  13. Delay to Return Temperature A Wait for the recirculating solution to reach setpoint temperature, monitored by the CIPS RTD.
  14. Alkali Conductivity TestThe COND sensor will be enabled to confirm addition of the required amount of alkali.
  15. Alkaline WashWhen temperature and conductivity are satisfied a flow totalizing register will accumulate pulses representing the Alkaline Wash volume  When the stored Alkaline Wash volume is reached, (a) the pump will stop, (b) the Drain Valve will open and (c) the Return valve will close. The CIPR motive means will discharge the wash solution to waste.

(to be continued DAS 2/18/2013)