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1 DATE APPROVED '
REQUEST AND ; AUTHQKlTY:#OR ^<YSS"1'
EXPENDITURES/RETIREMENTS.'^:^
1 Expense
9/U/81 ------
DIVISION OR COMPANY
Organic Chemical Divisions
ToCATION ! i" 1 ' " r"
J.O. CONTROL-POINT
Chicago P lant
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Clean out number two boilcgj
OSSCSIPTION
ESTIMATED PROJECT COST DISMANTLEMENT EXPENSE: TRANSFER e q u ip me n t
GROSS AMOUNT FOR AFPROVAL
l e s s t r a n s f e r e q u ip me n t
LESS SALVAGE OR TRADE-IN ALLOW
NET CASH REQUIRED <6or-3027)
RETIREMENT DATA
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DISMANTLEMENT____________
LESS SALVAGE,
SALES j NET ijiflNGS BEFORE TAXES
lVi|,|.j. NET'.:'||i|liER TAXES
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SJbN TOTAL INVEST.)
cfipYRS,
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TOTAL- CHARGE RESERVE
DESCRIPTION AND REASONS REQUIRE!
................... ................... .......
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DATE
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JOB ORDER NO*
OG-5514
AMOUNT
CUM. AUTHORIZATION
Funds of --------------------------------------------------------------------------------------------'-----------------------------------------$4000 are requested to clean out the Chicago Plant's number two boiler of scale.
CltiANAMiD
OC-5514 9/14/81 Page 2 of 5
DESCRIPTION AND REASONS REQUIRED
Proposed Work and Cost
Funds of
$4000
are requested to clean- out the Chicago Plant's number two boiler
of scale.
Present Situation
The Chicago Plant has two 150 H.P. high pressure steam boilers. Only one boiler is operated at a time, depending on the plants' process and heating requirements. The plant operates three shifts per day, seven days a week.
When the number two boiler was opened up for cleaning and the annual inspection by both the city of Chicago and insurance company, it was found that the water side of the boiler had a 1/8" thick scale deposit on it. Manual clean-out cannot remove this scale. If the boiler is to pass inspection this scale must be removed.
Inspection by the insurance company at the beginning of this year indicated a scale build up. It was decided to modify the chemical treatment to the boiler, but it is evident from the build-up of scale that this is not doing the job.
Justification
Scale deposit on the heating surfaces of the boiler act as insulator, retarding the flow of heat to the water, and causing the metal to become overheated, thus weakening it. Additional fuel must be used to overcome this insulating effect of scale,, as much as 20% when the scale coating reaches 1/8 inch thick; the thickness of the scale on the number two boiler.
CYWI 24-0006058
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OC-5514 9/14/81 Page 3 of 5
CYWI 24-0006059
OC-5514 9/14/81 Page 4 of 5
Details of Proposal The number two boiler will be chemically cleaned by a specialist under the supervision of Herman Bogot & Company and .plant personnel. The chemicals which contain inhibitors to reduce any attacks upon the boiler metal will be brought in by a tank truck and circulated by a pump on the truck through the boilers' wet side. The solution will be analyzed during the operation to check the cleaning process and keep the chemical .in contact with the boiler for the minimum length of time. The used chemical will be taken by the cleaner to an approved reclaimation plant. The boiler will be filled with a neutralizing solution and flushed with water. It will require one day, about 14 hours, to chemically clean the boiler. The preparing and closing up the boiler will be done while Bogat is here for regular weekly servicing.
Production Factors This proposal will not alter product quality or production rates.
Contingent Future Commitments Number 1 boiler will be opened after number 2 is put back in service. It is unknown at this time if any cleaning will be required. A job order has been written for the installation of an automatic chemical feed system to treat the boiler water.
Alternatives Considered Mechanical cleaning has been tried, but with very limited results. Due to the construction of the boiler, it is impossible to reach the majority of the scaled surfaces. If left untreated, additional fuel required, as well as heat damage to the metal of the boiler. Replace all tubes. Rejected as too costly and unnecessary.
CYWI 24-0006060
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CO-5514____ _ 9/14/81 Page 5 of 5
Risks The operating risk involved is a possible leaking of a boiler tube seam or pipe. Herman Bogot & Company will be present to correct if this occurs.
Concise Summary Chemical clean the boiler to increase efficiency and prevent damage.
CYWI 24-0006061