-- The Home Page of the Finishing Industry

on this site
current topics
Live! From beautiful Pine Beach New Jersey: Welcome to the world's most popular metal finishing website

topic 3270

Boilers chemical cleaning circulation with Nitrogen


Dear sir,

can you please explain how can we establish circulation in large natural circulation boilers during chemical cleaning without pumps and with Nitrogen pressure? and how the flow is effected?

Arumugam Ramalingam
construction company - Dammam, eastern, Saudi Arabia

October 29, 2008

it is a simple process to circulate stored solvent in the boiler without any pump by a process called auto circulation. The circulation is attempted by using nitrogen gas. The circulation will be in the reverse order in relation to regular steaming order.
Provide subs in all the down comers at 1/3rd distance from bottom. Make arrangements to feed nitrogen at regular intervals with vent open. pass nitrogen say for 5 mts and feed through next d\c. give interval for 30 mts. take sample for analysis. repeat till equalisation.
similarly circulate at various stages of operation like rinsing, citric rinse, neutralisation, passivation, etc.
any doubt address

thiruvenkatachari sampath
- chennai,tamilnadu, India

January 26, 2012

Some further questions:
How to inject nitrogen into downcomers?
Do you drill holes and weld connections?
How much nitrogen are you using for a boiler with, let us say, 100 m3 water volume? And at what pressure (reduced?)?

Thank You in advance

Anders Sundström
- Göteborg, Sweden

If you have a question in mind which seems off topic, please Search the Site

ADD a Q, A, or Comment on THIS topic START an UNRELATED topicView CURRENT HOT TOPICS

Disclaimer: It's not possible to 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 may be deliberately harmful.

  If you need a product/service, please check these Directories:

JobshopsCapital Equip. & Install'nChemicals & Consumables Consult'g, Train'g, SoftwareEnvironmental ComplianceTesting Svcs. & Devices

©1995-2019, Inc., Pine Beach, NJ   -   About   -  Privacy Policy
How Google uses data when you visit this site.