Monitoring for VOCs in water reclaimed from a petrochemical plant - Case Study

APPLICATION

Monitoring of reclaimed water for VOC contamination

CUSTOMER

Petrochemical plant in Taiwan

PROBLEM

The   customer needed   an   on-line   method   to monitor  the  methylene  chloride  and  dichloro-methane concentration levels in reclaimed water after a gas reclamation tower

PRODUCT

MS1200 with 4-20mA output

WHY MULTISENSOR?

The customer wanted a wide spectrum analyser toensure compliance with the regulations.

INSTALLATION FACTS

The  sample  is  mainly  composed  of  Triethyla-mineand Dichloromethane together with 3 -8 % saline  in  reclaimed  water.  The  water  is  then used  in  a  chlor-alkali  industry  factory.      The  in-strument has to be able to continuously analyse high chloride samples.

The  gas  reclamation  tower  main  job  is  to  re-move the three above mentioned chemicals.

The  TVOC  level  should  not  exceed  100  ppb  and when this happens, the customer is notified and can adjust the process accordingly.

Also, higher TVOC levels can be used to identify problems such as gasket leakages and ruptured disks  and  acts  before  the  problems  becomes too  serious.  Some  graphs  with  explanations  are available in the following page.