7/25/2019 Energy Engg (2)

1/23

Equipment for burning coal in lumpform

1) Fuel bed furnaces (or combustion)(coarse particle).

2) Pulverized coal furnaces (neparticles).3) !clone furnace (crus"ed particle).

#) Fluidized bed furnaces (crus"edsmall particle).

7/25/2019 Energy Engg (2)

2/23

1.Fuel bed furnaces (or

combustion)(coarse particle).$et"ods of fuel ring

%and ring$ec"anical (sto&er) ring

Principle of sto&er'verfeedingnderfeeding

7/25/2019 Energy Engg (2)

3/23

'verfeeding

7/25/2019 Energy Engg (2)

4/23

nderfeeding

7/25/2019 Energy Engg (2)

5/23

$ec"anical sto&erravelling grate"ain grate*preader+ibrating gratenderfeed

7/25/2019 Energy Engg (2)

6/23

ravelling grate

7/25/2019 Energy Engg (2)

7/23

"ain grate

7/25/2019 Energy Engg (2)

8/23

*preader

7/25/2019 Energy Engg (2)

9/23

nderfeed

7/25/2019 Energy Engg (2)

10/23

2. Pulverized coal furnaces (neparticles)

,dvantages and disadvantages of pulverizedfuel burners

,dvantages-

! brea&ing/ a given mass of coal into smaller pieces e0poses moresurface area for combustion"e s!stem is perfectl! free from clin&er and slagging troubles.ide variet! and lo grade coal can be burnt more easil!"is s!stem or&s ell in combination it" gas and oil, boiler can produce 2 tons of steam per "our from t"epulverized fuel red s!stemPracticall! no as" "andling problem occurs4ate of fuel feed can be regulated, boiler can be started from cold ver! rapidl! and e5cientl!

7/25/2019 Energy Engg (2)

11/23

6isadvantages-"ere ill be c"ance of e0plosion

*pecial equipment is required to start t"e s!stem"e furnace "as to be designed to "ig" temperature%ig" initial cost*eparate 7! as" removal equipment is required

Equipment for preparation of pulverizedcoal

all millall8race mill

oul mill

7/25/2019 Energy Engg (2)

12/23

all mill

7/25/2019 Energy Engg (2)

13/23

all8racemill

7/25/2019 Energy Engg (2)

14/23

oul mill

7/25/2019 Energy Engg (2)

15/23

Equipment for burning of pulverizedcoaloal urners

*tream lineurbulentangential!clone

*tream line

7/25/2019 Energy Engg (2)

16/23

urbulent

7/25/2019 Energy Engg (2)

17/23

angential

7/25/2019 Energy Engg (2)

18/23

!clone

7/25/2019 Energy Engg (2)

19/23

'il burners

,tomizationi) *team or air 9et:i) $ec"anical+apourising or Evaporating$i0ing of evaporated spra! it" air

ombustion of spra!

oal %andling *!stem or feedings!stem

nit or 6irect s!stemin or central or storage s!stem*emi direct ring s!stem

7/25/2019 Energy Engg (2)

20/23

,tomization

i) *team or air 9et:i) $ec"anical

7/25/2019 Energy Engg (2)

21/23

nit or 6irect s!stem

7/25/2019 Energy Engg (2)

22/23

in or central or storage s!stem

7/25/2019 Energy Engg (2)

23/23

*emi direct ring s!stem