Appropriate Local Boiler Technology
we have reliable low calorific value domestic coal firing thermal
power plants, proven itself with long term in operation? Yes we have,
let's name them
# 5-6, Seyitömer # 4, Kangal #3, Afşin-B.
power plants have proved themselves in operation for last 20-30
years. All these plant are very reliable in domestic low quality coal
firing. They solved their problems of low calorific value domestic
coal burning. They may have some other shortcomings which should also
be solved in time.
may have difficulty in soot blowing, so you must add up more number
of soot blowers.
dust filters may not meet emission standards, so you should build
bigger dust filters.
there is no FGD (flue gas desulphurisation), so you must add a new
NOx emissions do not meet required national standards, so you add
Low-NOx burners, if still not enough, then you install SCR (
Selective Catalytic Reactor).
investors who invested on domestic coal firing thermal power plants,
do not disclose the results of their investments so far. There are no
success stories, no high efficiency, no high availability information
told. Leaked news are not so encouraging. One a big thermal power
plant project is completed, the project results are shared by
everyone. This is an acceptable public relations activity, an
acceptable advertising in the market. We read the reports, academic
papers, listen to conference presentations, we congratulate our peers
and share their experiences. Over the past 10-years, the new
investments are carried out mainly on CFB technology, but there is
nothing disclosed in those investments, nothing shared with public.
the other hand there are lots of presentations, commercial and
academic papers, articles, news reports everywhere all available for
is a deep silence on these on indigenous coal firing power plants
mostly with the new CFB technology to burn low calorific value local
Until now, nobody explained anything. Billions of US
$ were invested for those plants. Hence there is no technical
evaluation, no information, nothing. After evaluating this secret
situation, my humble comment is as follows,
is found so clear that our low calorific value local coal with 50-55%
moisture (water) is almost impossible to fire without pre-heating,
dehumidification, and could not be fired properly without installing
dewatering systems. Excessive amounts of supplementary fuel oil
firing is necessary to fire the coal if delivered to boiler
combustion chamber as-is.
companies offered their off-the-shelf CFB designs to our local
investors, as a panacea, backed by cheap prices and cheap financing
by Exim banks funds.
impressed our local investors with their ultra cheap prices. However
their CFB technology does not meet to fire our high moisture low
heating value local coal. So in the end, top management decision
makers of local investor companies are aware of the current
situation that they made the investment decision. Until their time
for retirement, they do not make any sound and stay silent.
writer believes that the appropriate technology to fire our domestic
coal is in Afşin-B plant 4x350MWE, which has "indirect
pre-heating pulverized coal firing" coal combustion technology.
The original designer German Company went bankruptcy due to various
financial reasons at their homeland. Company withdrew from the
market, and is not active anymore. But designers, engineers are still
working in the commercial environment.
subcontractor Turkish companies (let us name them Gama, Tekfen,
Tokar) upgraded themselves and became leader engineering companies
serving worldwide to build new thermal power plants. Enka, Prokon,
Efor companies have similar references.
experienced engineering contractor companies can recreate the
original proven designs very easily in time if opportunity is placed
to the private entrepreneurship. Those companies can also employ the
original designers in their local design offices as expatriate
consultants if they really need so. So you can ask our engineering
companies to quote for 150-350 MWe thermal power plants. I believe
that they have such capability to bring together such work in time.
local engineering companies have sufficient number of references,
ample work experience and competency. So we employ domestic
engineering, fabrication, construction, contracting, as well as
domestic labour. We all know that there are hundreds thousands of
engineers working in international contracting companies. We can
bring together the same number of local engineers. Foreign companies
employ people like us, there is no difference.
an overseas construction job is completed, the contractor fulfills
the contractual requirements, operate the plant in commissioning,
temporary acceptance period, get the completion and receives the
final acceptance, then leaves the plant. After that the operator is
all alone to run the plant with all problems appearing later in time.
the contractor is in the home country, then they are responsible to
operate the thermal power plant all life long maybe 20-30 years
operation. Contractor has to solve every problem, satisfy the client
at all times in case problems, accidents, troubles arise. If not,
then the client not only stops working with you, but tells all others
in the market their displeasure that you can not work any more.
work with your client keeps you alive, fit, and helps you to improve
your design and your technology, makes you competitive in the global
Direskeneli, is a graduate of METU Mechanical Engineering department
(1973). He worked in public, private enterprises, USA Turkish JV
companies (B&W, CSWI, AEP), in fabrication, basic and detail
design, marketing, sales and project management of thermal power
plants. He is currently working as freelance consultant/ energy
analyst with thermal power plants basic/ detail design software
expertise for private engineering companies, investors, universities
and research institutions. He is a member of ODTÜ Alumni and Chamber
of Turkish Mechanical Engineers Energy Working Group.
18 February 2016