No registration or passwords; no pop-up ads -- just aloha, fun, & answers.
(as an eBay Partner & Amazon Affiliate earns from qualifying purchases).
Home /
T.O.C.
Fun
FAQs
Good
Books
Ref.
Libr.
Advertise
 
Help
Wanted
Current
Q&A's
Site 🔍
Search
pub  Where the
world gathers for metal finishing
Q&As since 1989



-----

Dissolved Oxygen+Residual Hydrazine




 

Dear Sir,

I am the chemical controller of a large Petrochemical company in India. I am facing a unique problem in Boiler water treatment. I seek your advice to troubleshoot.

We have 40 Ton/Hr steam system operating at 45 bar. We dose Hydrazine as the only oxygen scavenger to the water coming from deaerator , where dissolved oxygen is removed with steam. We dose morpholine also as a neutralizing amine along with hydrazine.

Recently, we have adopted to dose just the required hydrazine . We have reduced the quantity of hydrazine so that the residual hydrazine is barely 0.5 mg/lit.

The trouble is this water also shows the presence of Dissolved Oxygen to the extent of 0.4 mg/ lit.

1. Will you please brief me the rare (?) phenomenon of coexistence of Oxygen and residual Hydrazine?

2.Can I overlook the presence of Dissolved Oxygen since residual hydrazine is present ?

3. Should I increase the dosing quantity of hydrazine till dissolved oxygen is non-deductible ?

I will be happy to receive your expert reply at the earliest.

Regards,

V Nirmalgandhi
- Ranipet, Tamilnadu, India


I want to follow-up this question

Mario Trench
ABB Ltda - Sao Paulo, SP, Brazil
 



(No "dead threads" here! If this page isn't currently on the Hotline your Q, A, or Comment will restore it)

Q, A, or Comment on THIS thread -or- Start a NEW Thread

Disclaimer: It's not possible to fully diagnose a finishing problem or the hazards of an operation via these pages. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations might be harmful.

If you are seeking a product or service related to metal finishing, please check these Directories:

 
Jobshops
Capital
Equipment
Chemicals &
Consumables
Consult'g, Train'g
& Software


About/Contact  -  Privacy Policy  -  ©1995-2024 finishing.com, Pine Beach, New Jersey, USA  -  about "affil links"