×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Online analysis of hydrogen sulfide and ammonia - help

Online analysis of hydrogen sulfide and ammonia - help

Online analysis of hydrogen sulfide and ammonia - help

(OP)
Wet chemical scrubbers are used to treat foul air (primarily ammonia and hydrogen sulfide) emitted throughout a wastewater treatment plant. Currently utilise electrochemical sensors to provide continual online monitoring of ammonia and hydrogen sulfide.

The sensors are not used for control purposes. The sensor data is used for monitoring concentration trends and to provide alarms for the operators. The alarm set points are; High NH3 - 10ppm, High High NH3 - 15ppm, High H2S - 75 ppm, High High H2S - 100 ppm.

Having concerns with the long term reliability of the sensors. Two major concerns are build up of condensate and the interference of sulfide with the ammonia sensors.

Has anyone experienced similar concerns or suggest alternative methods for continual online analysis of ammonia and hydrogen sulfide.

Cheers

RE: Online analysis of hydrogen sulfide and ammonia - help

Test the sensors twice a year by using a handheld monitor. There are probably some at the plant for confined space entry. Also contact the manufacturer for ideas, and/or maintenance schedule. Check NIOSH for OSHA limits on exposure to make sure you are not out of compliance with OSHA.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources