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Thursday, 6 February 2014

COMMISSIONING BOILER ALKALI BOIL OUT ,ACID CLEANING PART -I I-ABC OF THERMAL POWER PLANT.

I discussed about neutralising pit and basic of ABO and AC cleaning in PART -I . I discussed

about neutralising pit because it remains unnoticed at site and only required during commissioning

time. If this is not made properly then land pollution will happen which may draw the attention of

statutory authorities and villagers surrounded the plant area. Instances are available that the project

work remain shutdown for indefinite period for this reason.

The next major requirement is pumping station and its accessories. One may require 03 to

05 numbers of pumps depends upon their requirement and conditions of the pump. It is

expected that pump will get damaged during acid operation with HCL . If other method

( EDTA) is adopted then chance of damage is minimum. Therefore one has to design a

temporary foundation and location for carrying out the same . If there is two unit then

location will be between the two units depending upon plant lay out. Finished Level of

temporary foundation should be 100 mm below the Finished level of that area. One ABO and AC

cleaning is over then the temporary foundation will be buried in the ground.

We have seen 200T/hr flow and 200MWC pressure pump is sufficient for this purpose. However

valves, pipelines , flanges etc are needed. For electrical a local station can be made near the

station with DOL starter. I have seen motor capacity is approximately 90 KW. Two Tanks

can be fabricated at site with the help excess CW pipe lines . Out of two bigger one ( mixing

 tank will be near the pump and other one will be on the boiler floor ( any floor above 8 M).

Few photographs are attached herewith for explanation.






continued to part -iii for process description.

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