Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.
Upcoming SlideShare
Feedwater heaters in thermal power plants
Next
Download to read offline and view in fullscreen.

Share

Feedwater heater control: Level

Download to read offline

Feedwater Heater Control: Bring Your Efficiency to a New Level -- Kevin Hambrice, Global Factory Sales and Marketing Manager-Level, K-TEK, A Member of the ABB Group

Related Books

Free with a 30 day trial from Scribd

See all

Related Audiobooks

Free with a 30 day trial from Scribd

See all

Feedwater heater control: Level

  1. 1. WMP-113-1 Feedwater heater control: Bring your efficiency to a new LEVEL ABB Automation & Power World: April 18-21, 2011 © ABB Inc. May 31, 2011 | Slide
  2. 2. WMP-113-1 Feedwater heater control: Bring your efficiency to a new LEVEL <ul><li>Speaker name: Kevin Hambrice </li></ul><ul><li>Speaker title: Global Factory Sales & Marketing Manger - LEVEL </li></ul><ul><li>Company name: K-TEK, A Member of the ABB Group </li></ul><ul><li>Location: Prairieville, LA </li></ul>© ABB Inc. May 31, 2011 | Slide
  3. 3. © ABB Inc. May 31, 2011 | Slide Feedwater Heater Control Why is feedwater heater level control important? <ul><li>Heaters preheat feedwater before boilers converted it to steam </li></ul><ul><li>“ Preheating” reduces energy to flash the water into steam </li></ul><ul><li>Liquid level of condensate is formed as steam condenses </li></ul><ul><li>Level is controlled to create a seal and prevent steam blow-through </li></ul><ul><li>Accurate and repeatable level measurement keep boiler fuel consumption down </li></ul>
  4. 4. Feedwater Heater Control What are you controlling and why? © ABB Inc. May 31, 2011 | Slide Injected steam condenses and acts as a seal to prevent blow-through of steam in the heater Maximum thermal transfer between steam & feedwater takes place when largest tube area exposed to steam Small increase in condensate level (2-in to 4-in) over minimum greatly reduces the heat rate efficiency)
  5. 5. Feedwater Heater Control Traditional Devices Used for Feedwater Level Measurement <ul><li>Mechanical displacement type level systems with pneumatic controllers have been used </li></ul><ul><li>Two major issues </li></ul><ul><ul><li>Mechanical nature requires high maintenance due to seal and bearing failures and air supply issues </li></ul></ul><ul><ul><li>Varying liquid density of water and steam creates significant measurement errors in displacer. </li></ul></ul>© ABB Inc. May 31, 2011 | Slide Sight Glass Displacer Differential Pressure Conductivity Probes
  6. 6. Feedwater Heater Control Best Practice Feedwater Level Control <ul><li>Magnetic level gauges and magnetostrictive level transmitter used to improve control </li></ul><ul><li>Performance and reliability control condensate level at 2” to 3” above the drain </li></ul><ul><li>More tube area is exposed to heat and additional feedwater with the same energy input </li></ul><ul><li>Increases heater throughput and efficiency </li></ul><ul><li>Accuracy (±1”) of the system prevent steam blow-through </li></ul>© ABB Inc. May 31, 2011 | Slide Certified to ANSI/ASME B31.1 360º Magnetic Ring 75 Grams Buoyancy
  7. 7. Feedwater Heater Control Precision Measurement for Changing Process Conditions <ul><li>Thermocouple can be installed to compensate for density changes of the condensate </li></ul><ul><li>Small small change float buoyancy affects accuracy </li></ul><ul><li>Simples correction in DCS, allows lower condensate levels in the heater </li></ul><ul><li>Improves efficiency even more </li></ul>© ABB Inc. May 31, 2011 | Slide
  8. 8. Feedwater Heater Control Proven Success <ul><li>“ We saw a return on investment and efficiency gain within 6 months” </li></ul><ul><li>“ I’ve been pleased with the significant maintenance savings with the elimination of sight glass repairs.” </li></ul><ul><li>“ We were looking for a reliable solution that would be accurate and repeatable – we got this with the MLT technology.” </li></ul>© ABB Inc. May 31, 2011 | Slide
  9. 9. Improving Power Plant Efficiency ABB – Your partner for Measurement Solutions <ul><li>World class instrumentation solutions built on over 100 years of experience </li></ul><ul><li>Built upon the leading names and brands in the automation world: </li></ul><ul><li>Unrivalled in its scope and applications expertise </li></ul><ul><li>Solutions certified to international standards </li></ul><ul><li>Worldwide network of sales offices and manufacturing plants </li></ul>
  10. 10. © ABB Group May 31, 2011 | Slide
  • alifanwar

    Apr. 11, 2019
  • ReymundIlagan

    Apr. 17, 2018
  • manishsahu49

    Jun. 24, 2017
  • neorit1000

    Apr. 16, 2016
  • sambairaja

    Jul. 23, 2015
  • FiantiDarmawan

    Jan. 2, 2014

Feedwater Heater Control: Bring Your Efficiency to a New Level -- Kevin Hambrice, Global Factory Sales and Marketing Manager-Level, K-TEK, A Member of the ABB Group

Views

Total views

4,402

On Slideshare

0

From embeds

0

Number of embeds

22

Actions

Downloads

155

Shares

0

Comments

0

Likes

6

×