Boiler-water treatment chemistry for thermal IPPs
Programme outline, dosing range, feed points, target parameters, and lead times for the AAS boiler-water treatment into the power plants segment in Pakistan. Sole Pakistan agent for Shaanxi Ande Technology (China) and Innovative Water Technology (Pakistan). Karachi office, same-business-day technical response.
Same-day Karachi visit · CoA per drum · Engineering autopsy on request
AAS supplies legacy hydrazine and modern carbohydrazide / DEHA scavengers — the call is the customer's OEM specification and EHS posture, not a one-size programme.
Dosing programme outline
Programme outline below is the AAS default for power plants applications. Final dose is set against the customer's source-water analysis, equipment metallurgy, and operating cycles. Every drum ships with a Certificate of Analysis; SDS is shipped pre-shipment for HSE-document review.
- Oxygen scavenger
- Carbohydrazide / DEHA, dosed pre-economiser
- Target dissolved O₂
- < 7 ppb at economiser inlet
- Neutralising amine
- Cyclohexylamine + morpholine blend
- Target condensate pH
- 8.8–9.3 (carbon steel) or 9.2–9.6 (mixed metallurgy)
- Internal-treatment programme
- Co-ordinated phosphate / polymer for drum boilers
- Target boiler-water Na/PO₄
- Per ASME / EPRI guidelines for the operating pressure
- Blowdown set against TDS limit
- Per IBR class / OEM specification
- Compatibility
- All major drum-boiler / HRSG OEMs
- Lead time
- Ex-Karachi stock on scavenger and amine
Why IPP boilers fail on the wrong scavenger / amine pair
Modern HRSG and utility-boiler chemistry is set by the OEM (Mitsubishi, Siemens, GE, BHEL) against the operating pressure of the boiler. A 1,200 psig drum requires a different oxygen-scavenger and internal-treatment discipline than a 600 psig auxiliary boiler. Two failure modes show up in Pakistani IPP practice: hydrazine carried over into condensate (ammonia formation, copper-alloy attack), and under-dosed amine in long condensate networks (carbonic-acid pitting at distant returns). AAS sizes scavenger and amine programs against the boiler OEM specification and the customer's condensate-network geometry.
Read deeper into the programme.
Request a technical proposal for boiler-water treatment.
Send the unit you're trying to protect (site, loop or train, symptom or KPI, volume, deadline) plus a source-water analysis if you have one. Same-business-day Karachi reply with a programme outline, dose range, and the relevant CoAs / SDS attached.
Karachi office · Sole Pakistan agent · Shaanxi Ande & Innovative Water