Sour Water Stripper H₂S Control — Triazine Scavenger
When a sour water stripper (SWS) leaves residual hydrogen sulfide in overhead vapour, off-gas or stripped water — during upsets, load swings or capacity limits — a triazine H₂S scavenger polishes it out, cutting odour, corrosion and downstream specification problems.
Quick answer: triazine polishes residual H₂S around the SWS (overhead/off-gas, stripped-water, upset streams). It scavenges H₂S only — the stripper still handles ammonia. For hot continuous service, MMA Triazine 40% resists solids; MEA Triazine 78% gives cost-effective bulk polishing.
Where Triazine Helps Around the SWS
- Stripper overhead vapour and off-gas polishing
- Stripped-water residual H₂S before reuse or disposal
- Process condensate and intermittent sour streams
- Turnaround / upset-driven temporary H₂S mitigation
Keys to Clean Operation
- Dose to measured H₂S load — avoid over-treatment.
- Select a soluble-by-product grade for hot streams.
- Provide mixing and contact time at the injection point.
- Monitor spent scavenger and residual amine to prevent fouling.
Frequently Asked Questions
What is a sour water stripper and why does residual H2S remain?
A sour water stripper (SWS) uses steam to strip H2S and ammonia from refinery/process sour water. Upsets, load swings or capacity limits can leave residual H2S in stripped water, overhead vapour or off-gas, causing odour, corrosion and downstream spec problems. A triazine scavenger polishes that residual H2S.
Where is triazine used around a sour water stripper?
Common points are the stripper overhead/off-gas, stripped-water polishing before reuse or disposal, and process condensate or intermittent sour streams during turnarounds and upsets. It is a chemical polish/backup rather than a replacement for the stripper itself.
Can triazine handle the elevated temperatures of SWS service?
Yes, with grade selection. Hot, continuous streams favour a grade whose reaction by-products stay soluble to avoid solids and scaling — often MMA triazine 40% — while MEA triazine 78% suits cost-effective bulk polishing where temperature and by-product solubility allow.
Does triazine remove ammonia too?
No. Triazine is an H2S scavenger; it neutralises hydrogen sulfide, not ammonia. The sour water stripper remains responsible for ammonia removal — triazine polishes residual H2S the stripper leaves behind.
How do I avoid solids when treating SWS streams?
Dose to the measured H2S load to limit wasted chemical and residual amine, pick a more soluble grade for hot streams, and ensure adequate mixing/contact time. The main way to avoid solids is to monitor spent scavenger, reaction by-products and ongoing H₂S exposure, and to manage or replace the scavenger in good time — before it becomes over-spent and by-products drop out and foul lines.
Do you supply triazine for refinery sour water applications?
Yes. Vasudev Chemo Pharma manufactures MEA Triazine 78% and MMA Triazine 40% and exports globally with batch COA and application guidance for sour water stripper polishing and refinery sour water H2S control.
Polishing residual H₂S around your SWS?
Vasudev Chemo Pharma supplies MEA Triazine 78% and MMA Triazine 40% with application and dosing guidance, batch COA, and global export from Gujarat, India.