| Operational Report on the Numagami Resources Circulation Center, City of Shizuoka |
Naoki HIGUCHI* and Kiyonori WAKATSUKI*
(*Environmental Engineering Dept. Ⅱ) |
(Abstract)
The
Numagami Resources Circulation Center (hereafter, the center) is an intermediate
treatment facility that was constructed as recycling plaza designed to recycle
and reduce the volume of waste within a recycling-oriented society. The center
consists of an incombustible and oversized waste recycling plant, plastic bottle
recycling plant and slag recycling plant, and is capable of processing 160 tons
of waste every five hours. The incombustible and oversized waste recycling plant
is capable of processing 100 tons of waste every five hours and separates waste
into four different categories: combustible, incombustible, steel and aluminum.
CO concentration meters have been installed to detect fires as soon as possible
in an effort to prevent major fires from starting. The slag recycling plant has
been designed to sort the granularity of melted slag carried in from the
adjacent ash melting plant so that it can be used effectively as a form of
construction material (asphalt compound). |
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| Development of Dust Remover |
Jin AKIYAMA*
(*Mechanical Design and Engineering Dept.) |
(Abstract)
Waste
heat boilers such as waste incinerators, which recover thermal energy from
combustion gas that contains highly adhesive dust with a low melting point, can
suffer from a reduction in thermal efficiency due to dust adhering to the
surface of heating tubes. Dust removers are required in boilers to limit this
adhesion and to ensure more reliable operation. While there are many different
varieties of dust removers available, a design that can remove dust from
horizontal tubes without the use of steam or similar vapors by subjecting tubes
to shocks or vibrations, such as hammering devices used to remove dust from
suspended heating tubes, has been developed. Tests conducted with the new dust
remover installed within actual economizers revealed that thermal recovery
efficiency was improved, and that there was no impact on the durability of the
device or the heating tubes. |
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Test of Gasification and Methanol Synthesis from Wood
and RPF
－Test requested by the National Institute for Environmental Studies－ |
Kazuki HAYASHI*, Hiroki YAMASAKI* and Katsuya KAWAMOTO**
(*Energy & Environmental Development Dept., **Center for Material Cycles and
Waste Management Research, National Institute for Environmental Studies) |
(Abstract)
In 2010,
we received a request from the National Institute for Environmental Studies to
conduct the “Gasification, gas purification and liquid fuel synthesis test by
using waste wood and RPF (Refuse paper & Plastic Fuel) materials”.
This test was
conducted in the pilot scale gasification plant that employed fluidized bed
gasifier and methanol production equipment. The temperatures of gasification
were set to 750 and 810 ºC. The aims of this test were to evaluate gasification
characteristics and tar decomposition by specific catalyst and to clarify the
influence of gasification on methanol production result when using different
feed stocks described above.
The results of the test showed that the carbon
conversion efficiency from 91 to 99% and the cold gas efficiency from 59 to 66%
were achieved. The tar concentration significantly decreased under the condition
with the high gasification air ratio. No adverse effect on methanol production
was observed in all the experiments. |
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| Introduction of Analysis Technology used for
Environmental Analysis and Waste Analysis |
Naoya MIZUNO*, Shouhei FUJIMOTO* and Eiji KOYAMA*
(*K-soltech Co., Ltd.) |
(Abstract)
Issues
related to environmental pollution due to chemicals seemed to be on the verge of
being resolved in recent years following advancements in technology, however new
issues have started to surface, including global warming due to the release of
greenhouse gases, and the emission of radioactive substances, with no clear end
in sight for environmental pollution. With these issues ever-present,
environmental analysis is a vital technology for visualizing the state of
pollution. This report outlines developments in the environmental analysis field
with a key focus on various analysis technologies such as dioxins, air
pollution, offensive odors, water quality, waste, asbestos and radiation.
Considerations and the latest trends in analysis are also covered, including the
state of recycling tests, physical tests and microanalysis. |
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