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.

Red river in clinker cooler

8,056 views

Published on

Published in: Technology, Business
  • Follow the link, new dating source: ♥♥♥ http://bit.ly/2F90ZZC ♥♥♥
       Reply 
    Are you sure you want to  Yes  No
    Your message goes here
  • Dating direct: ❤❤❤ http://bit.ly/2F90ZZC ❤❤❤
       Reply 
    Are you sure you want to  Yes  No
    Your message goes here
  • DOWNLOAD THIS BOOKS INTO AVAILABLE FORMAT (2019 Update) ......................................................................................................................... ......................................................................................................................... Download Full PDF EBOOK here { https://soo.gd/irt2 } ......................................................................................................................... Download Full EPUB Ebook here { https://soo.gd/irt2 } ......................................................................................................................... Download Full doc Ebook here { https://soo.gd/irt2 } ......................................................................................................................... Download PDF EBOOK here { https://soo.gd/irt2 } ......................................................................................................................... Download EPUB Ebook here { https://soo.gd/irt2 } ......................................................................................................................... Download doc Ebook here { https://soo.gd/irt2 } ......................................................................................................................... ......................................................................................................................... ................................................................................................................................... eBook is an electronic version of a traditional print book THIS can be read by using a personal computer or by using an eBook reader. (An eBook reader can be a software application for use on a computer such as Microsoft's free Reader application, or a book-sized computer THIS is used solely as a reading device such as Nuvomedia's Rocket eBook.) Users can purchase an eBook on diskette or CD, but the most popular method of getting an eBook is to purchase a downloadable file of the eBook (or other reading material) from a Web site (such as Barnes and Noble) to be read from the user's computer or reading device. Generally, an eBook can be downloaded in five minutes or less ......................................................................................................................... .............. Browse by Genre Available eBooks .............................................................................................................................. Art, Biography, Business, Chick Lit, Children's, Christian, Classics, Comics, Contemporary, Cookbooks, Manga, Memoir, Music, Mystery, Non Fiction, Paranormal, Philosophy, Poetry, Psychology, Religion, Romance, Science, Science Fiction, Self Help, Suspense, Spirituality, Sports, Thriller, Travel, Young Adult, Crime, Ebooks, Fantasy, Fiction, Graphic Novels, Historical Fiction, History, Horror, Humor And Comedy, ......................................................................................................................... ......................................................................................................................... .....BEST SELLER FOR EBOOK RECOMMEND............................................................. ......................................................................................................................... Blowout: Corrupted Democracy, Rogue State Russia, and the Richest, Most Destructive Industry on Earth,-- The Ride of a Lifetime: Lessons Learned from 15 Years as CEO of the Walt Disney Company,-- Call Sign Chaos: Learning to Lead,-- StrengthsFinder 2.0,-- Stillness Is the Key,-- She Said: Breaking the Sexual Harassment Story THIS Helped Ignite a Movement,-- Atomic Habits: An Easy & Proven Way to Build Good Habits & Break Bad Ones,-- Everything Is Figureoutable,-- What It Takes: Lessons in the Pursuit of Excellence,-- Rich Dad Poor Dad: What the Rich Teach Their Kids About Money THIS the Poor and Middle Class Do Not!,-- The Total Money Makeover: Classic Edition: A Proven Plan for Financial Fitness,-- Shut Up and Listen!: Hard Business Truths THIS Will Help You Succeed, ......................................................................................................................... .........................................................................................................................
       Reply 
    Are you sure you want to  Yes  No
    Your message goes here
  • DOWNLOAD FULL BOOKS, INTO AVAILABLE FORMAT ......................................................................................................................... ......................................................................................................................... 1.DOWNLOAD FULL. PDF EBOOK here { https://tinyurl.com/y6a5rkg5 } ......................................................................................................................... 1.DOWNLOAD FULL. EPUB Ebook here { https://tinyurl.com/y6a5rkg5 } ......................................................................................................................... 1.DOWNLOAD FULL. doc Ebook here { https://tinyurl.com/y6a5rkg5 } ......................................................................................................................... 1.DOWNLOAD FULL. PDF EBOOK here { https://tinyurl.com/y6a5rkg5 } ......................................................................................................................... 1.DOWNLOAD FULL. EPUB Ebook here { https://tinyurl.com/y6a5rkg5 } ......................................................................................................................... 1.DOWNLOAD FULL. doc Ebook here { https://tinyurl.com/y6a5rkg5 } ......................................................................................................................... ......................................................................................................................... ......................................................................................................................... .............. Browse by Genre Available eBooks ......................................................................................................................... Art, Biography, Business, Chick Lit, Children's, Christian, Classics, Comics, Contemporary, Cookbooks, Crime, Ebooks, Fantasy, Fiction, Graphic Novels, Historical Fiction, History, Horror, Humor And Comedy, Manga, Memoir, Music, Mystery, Non Fiction, Paranormal, Philosophy, Poetry, Psychology, Religion, Romance, Science, Science Fiction, Self Help, Suspense, Spirituality, Sports, Thriller, Travel, Young Adult,
       Reply 
    Are you sure you want to  Yes  No
    Your message goes here
  • Good
       Reply 
    Are you sure you want to  Yes  No
    Your message goes here

Red river in clinker cooler

  1. 1. RED RIVER IN CLINKER COOLER
  2. 2. 1. Fine dusty clinker 2.Segregtion in kiln due to wide range in particle size. Material characteristics , and rotation of kiln 3. Cooler design, air flow distribution Non-uniform clinker bed 4.Operation and maintenance of cooler
  3. 3. Hot fine dust , wide granulometry in size and the consequent segregation are the key reasons for the red river formation in cooler When the cooling air tries to penetrate the closely packed fine clinker dust layer the air gets heated and expands manifold in volume , fluidizes dust and it stars flowing like water much faster than the grate speed and stops when it becomes black with bubbles. The shear stress exerted by the air results in kinetic energy of the mass, like thixotrpic in non newtonian fluids. Higher the shear force ( here air flow velocity ) higher the fluidity over a period of time. Finer and hotter the dust the more it shoots like flooded wild river. Some designers tried to put some dam ring in conventional grate coolers or flow arrestors on its way to reduce its velocity but it did not help as it jumps over the hurdles. This hot clinker dust erode and burn the plates . These are the reasons that make the cooler designers to invent new generation coolers .The stationary inclined grates with control flow aeration and controlled flow air regulators reduced red river problems considerably .In some new generation also coolers the problems still exists. Reason for red river
  4. 4. 1.Dusty clinker and improvements To day it is common problem that clinker is dusty. In 1 mm sieve, if pass- through is 15-20 % it is a normal clinker. In classic wet process the clinker nodules are very good like pebbles. In this dry process with precalciner and higher production ,the fines generation is on the higher Side. Volatiles like sulfur ,alkalies and alternate fuels further aggravate this . Forced kilns and reduced conditions are also key reasons for dusty Clinker. Ring formation in the outlet or in the burning zone deteriorates nodulisation and force the kiln to operate on higher rpm which shifts clnker discharge away from center of the cooler • The nodulisation can be improved by modifying Alumina and silica ratio, to great extent. Optimise the liquid with right viscosity yield good nodules • Grinding the raw meal finer helps too especially when quartz and calcite are present . • Good homogenised raw meal having standard deviation in CaO <0.2 and SiO2 < 0.02 will reduce dust fraction in clinker. • Addition of mineralisers like MgO , if limit allows, improve the nodularity. • Intense convergent flame without impinging the charge also helps to reduce the fines in the clinker. • Higher rpm aids good nodulisation but not more than requirement and with 11-12% filling. There are many more reasons for poor nodulisation.
  5. 5. In 1 mm sieve if the pass through is around 15 % is Normally considered to be good clinker.
  6. 6. Q Q1> Q2 <Q3 More escape Of cooling air Less recuperation good nodules Best recuperation Less passage Of air, only fluidisation occurs Bad recuperation 0.2* D This segregated fine Dust causes red river Least Resistance To air flow More resistance To air flow
  7. 7. 100 75 50 25 20 15 10 5 2 1 0.1 0.5 0 mm Un cooled area(lumps and big balls) Reddsh core When broken Best recuperation area Red river area Cooling efficiency curve
  8. 8. Segregation inside the kiln at the discharge end The hotter fine dust, it gets lifted farther up inside the kiln and good nodules cascade farther down which results in segregation. If the kiln has shark teeth at the kiln tip it becomes worse which results in more intense red river or even snowman formation. Higher rpm also aids segregation .Higher secondary air velocity causes circulation of fine dust between cooler and kiln which makes dust more sticky. Secondary and Tertiary air take off velocity in the hood is to be less than 5 m/s.The fine dust falls on towards the rotation side of the kiln. Though theCooler center point is offset by 0.2 D of kiln , expecting center of clinker Discharge and center of cooler falls on the same line but it never happens .Technology has not been fully developed to have uniform clinker distribution on cooler grate But the cooling air distribution has been achieved by mechanical air flow Controllers which regulates air flow depending upon the resistance created by Clinker bed and its packing density. Latest generation coolers like SF cooler, IKN pendulum , Eta cooler and pyro floor are already in use. This helps in reducing the red river problem or at least reduction In cooler grate Plate damage considerably.
  9. 9. bad distributionbetter distributionBest distribution worst distribution Required rpm High rpm Very high rpmHigher rpm Normal segregation High segregation Higher segregation Very high segregation Influence of Kiln rpm on particle segregation and distribution of clinker bed in cooler
  10. 10. New generation cooler
  11. 11. Mechanical flow regulators in the new generation coolers optimise the cooler Air flow avoiding starvation or excess flow. This can be rearranged in either case altering the orifice size. Mechanical air flow regulators
  12. 12. Automatic air flow regulator installed underneath the grates
  13. 13. Solution The ultimate solution is to produce good nodules. Coolers are designed for good Nodules and 25 mm is the reference .Modify the chemistry with good homogenisation to get good uniform nodules . Good convergent flame in center of the kiln , without impinging on charge reduces dust fraction .Oxidised conditons in burning zone will have control over volatiles Which improves nodulisation. Distribution of coolng air helps to reduce the red river . Combination of stationary Inclined KIDs and controlled air flow regulators in the rest of the grate reduce the Redriver. Narrow down the stationary KIDS with thicker clinker bed , atleast 600-700mm thick bed helps further.
  14. 14. Thank you for your kind attention - K.P.PRADEEP KUMAR

×