You may need
to download Acrobat Reader to view and print the document. Boiler Water- Problems & Solutions
A. Bhatia, B.E.
Course Outline
The quality of water required for safe and efficient operation of modern packaged boiler needs to be very high and a successful boiler operation requires a total system approach to:
It is purpose of
this 3- hour course to provide an overview on how water treatment & control
can keep up the boiler system efficiency and reliability.
This course
includes a multiple-choice quiz at the end, which is designed to enhance the
understanding of the course materials.
Learning Objective
At the conclusion of this course, the student will be aware of:
This course is aimed at students, professional engineers, energy & environment auditors, O & M personnel, and loss prevention engineers.
Course Introduction
In a boiler, energy
in the form of heat is transferred from a fuel source to the water across a
heat transfer surface. When subjected to temperature and pressure, the composition
of the boiler water undergoes radical changes; Solubility's are exceeded, the
effects of dissolved gases are magnified, and the efficiency of the heat-transfer
process is affected.
The heat transfer efficiency of steam generation depends on the degree of fouling
of the surfaces and wall. By keeping the surfaces clean both on the fire side
and water side, the heat transfer coefficient can be reasonably maintained.
Water treatment & conditioning alone becomes a very important aspect of
energy conservation program.
Many factors determine the type of boiler water treatment needed for any given
system. Various water treatment equipments based on ion-exchange or membrane
technology are available to improve the water quality. Besides wide range of
chemical formulations are available from water treatment companies to control
individual parameters such as alkalinity, conductivity, pH, dissolved gases
etc.
Course Content
The course content is in a PDF file Boiler Water- Problems & Solutions. You need to open or download this document to study this course.
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Course Summary
Scale, corrosion,
and pitting in boiler systems lead to efficiency losses. A well-balanced internal
and external boiler water treatment program addresses all of the potential problems
associated with boilers, including:
1) The control or removal of calcium and magnesium hardness through external
(mechanical) pretreatment or internal (chemical) treatment
2) The maintenance of proper levels of sludge conditioners to ensure that any
present or precipitated suspended solids remain fluid so they can be properly
blown down
3) The maintenance of appropriate levels of alkalinity to ensure that proper
chemical reactions are allowed to occur
4) The control of dissolved oxygen through external pretreatment or through
the use of a suitable oxygen scavenger
A chemical addition program in addition to the external water treatment is the
best way to insure, that deposit formation or corrosion does not become a problem.
The requirement of chemicals goes down substantially if proper water treatment
system exists.
Other than the routing water treatment program, condensate return must be maximized.
The condensate water has high level of purity and it recovery is critical to
the cost of water treatment.
It is very important that careful operation and maintenance practices along
with regular checks & testing procedures be incorporated as a part of the
treatment program. No treatment can be better than the way it is applied.
Quiz
Once you finish studying the above course content, you need to take a quiz to obtain the PDH credits.
