9 11 12 Refractory Problems

7/30/2019 9 11 12 Refractory Problems

1/9

1 / 9

Communication Form Site Management

(Compile date )2012/10/26 (Refrence No.): 330BCFSM024(PROJECT NAME) MADHUCON PHASE II(TYPE OF BOILER) 330B-MX1(UG-487/13.7-M)

PART NAME

(BRICKS LAYING DWG)

(DRAWING NO.) 330B-5

Problemdescribe

3#

Regarding to the problem of 3# castable on site construction,

introduction will be made step by step as the photo during

construction.

Soultion

. The serious waste of materialsduring site construction

1 pic11


2/9

2 / 9

During site construction, materials are wasted seriously,Pic. 1 was

taken during right separator import construction;

. Improper storage of the materials

2 pic2 3 pic3

23

Pic.2 and Pic.3 showed the storage situation of refractory brick and

insulating brick on site, all bricks on site were air storage, not

meet the castable storage requirements.

. Castable junction surface

4 pic4

4

Must ensure the smoothness of the position pic.4 showed after

construction every time.

here should be

smooth, or castable

will be leakiness

and easily dropped.

correctly

construction,

smoothness satisfied

the requirements


3/9

3 / 9

.Pouring on header

5 pic5

300mmWhen separator band header castable construction,300mm transition

region should be ensured.

. During construction of plastic material

6 pic6

7 pic7

300mm

There should be

no binding gap 300mm

above the header, castable

should be completion

entirely in this area.

Wrong

construction ,

water enters

Right

construction,color after

construction


4/9

4 / 9

6

7

Water entered part locaion of plastic material, lead to the

construction quality can not meet the requirements(as the comparison

in pic. 6), workers can use the agglutinant(pic.7) for washing hands

during site construction, no water for washing.

. Part of wall surface

8 pic8 9 pic9

898

Comparision between Pic.8&pic.9, part of wall surface is not smooth,

maybe theres no firmly hammer after construction.

. Asphalt brushed uneven

10 pic10 11 pic11

1011

Asphalt brushed uneven,as pic.10(upper part of furnace side

wall),pic.11(underpart of furnace)

. Reserved combination spaceof two different parts does not meet the requirements


5/9

5 / 9

12 pic12

The reserved space at center cylinder of seperator,castable here will

be easily dropped during boiler operating.

. Nail construction in water-cooled plenum

13 pic13

The

space here is

too narrow,

bigger space is

needed to

ensure the

strength.


6/9

6 / 9

14 pic14

15 pic15 16 pic16

131414

1516

Pic.13 and pic.14(in pic.14,nails blocked the air inlet of cowl),nailswelding does not in according with the drawing,site construction

should be as pic.15&16)

. Sealing should be donebefore the water-cooled plenum castable construction


7/9

7 / 9

17 pic17

18 pic18

19 pic19

Unfinished

sealing here.

Unfinished

sealing here,

coal will

easily

leaking.

Sealed

here.


8/9

8 / 9

17181918

In pic.17&18, different parts of water-cooled plenum had not

sealed yet; pic.19 showed the completed sealing style, the same part

as pic.18.

. Return device construction

20 pic20 21 pic21

2021330B-5

Pic.20&21 should open the venthole during

ovening according to 330B-5 technical requirements when welding the

nails.(venthole can be made by welding gun directly.

22 pic22

2#222#

3#4#

2# Boiler (pic.22), template and vibrator are unused during return


9/9

9 / 9

apparatus construction, result in large area castable damaged during

2# boiler operating. Second stage( 3# and 4# boiler) are required to

use template and vibrator, or re-construction should be apply.

.

23 pic23

23The reserved space

from furnace exit to expansion joint of separator (pic.23) is too

small.

4#Note: regarding to above problems, re-construction should be appliedif seriously affected the construction quality; if not seriously,should pay attention during construction of 4# boiler.

(CONSTRUCTION COMPANY)(REPRESENTITIVE):(SIGN DATE) Annex

the

space here is

too smallcan not meet

the

requirement

the

space here

can meet the

requirement

9 11 12 Refractory Problems

Documents

Transcript of 9 11 12 Refractory Problems