| Operation Report of Waste Treatment Plant in Gaoan
Tun, Beijing |
Isao MAEDA*
(*Environmental Engineering Dept. Ⅱ) |
(Abstract)
In Chine, where environmental regulations are becoming stricter, and demand for the
reduction of global-warming gas emission is growing, there is a trend to adopt
waste incineration facilities that convert wastes to energy and conserve
environment. Waste incineration plants are being built in several major
population centers in China, including Beijing, its capital.
The plant that we have built in Beijing consists of two incineration
furnaces, each with the combustion capacity of 800 ton／day. This is the largest
ever built by Takuma. For its exhaust-gas treatment, we have chosen the flash
dry absorber, forgoing the traditional dry, slaked-lime injection + bag filter
system. The plant was completed and the test run was performed without major
incident, and it was formally delivered to the customer in July of this year.
This article reports on the outline of the plant, and its operation. |
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Operation Report of High Density Chlorine-based
Infectious Waste Treatment Plant
－Handling and Treatment of Block-fed Infectious Waste－ |
Hiroaki HYUGA*
(*Energy Engineering Dept.Ⅱ) |
(Abstract)
The plant described in this article was permitted in December 2007 as a waste
treatment facility primarily to handle medical waste among the industrial waste
stream. It was completed and delivered in February 2009 to the customer, Kobe
Kankyo Create Co., Ltd.
This plant mainly burns medical wastes that include high-density
chlorine-based waste, along with various other industrial wastes. It has a
kiln-and-stoker type furnace, and is characterized by its treatment of chlorine,
and the feeding system of the infectious waste. This article reports on the
results of its operation. |
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| Atomizing and Combustion of Kerosene using
Ultrasonic Wave |
Satoshi YOSHIMOTO*
(*Energy & Environmental Development Dept.) |
(Abstract)
One of the areas utilizing powerful ultrasonic wave is the technology of
liquid atomization that uses submerged ultrasonic oscillator of MHz class.
When a submerged ultrasonic oscillator radiates ultrasonic waves into a
two-layered liquid of kerosene on top and water below, atomization volume
increased fifty percent over the kerosene-only operation. It is assumed that
this increase has been accomplished by the lens effect of upheaval at the
boundary area of the two liquids that focuses the ultrasound wave, raising the
sound pressure inside the kerosene layer. We have also conducted a combustion
test, supplying ultrasound-atomized kerosene to an LPG pilot burner flame, and
obtained a stable temperature elevation curve. |
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Operation of Demonstration Plant of Alkaline
Pretreatment Hydrogen-methane Fermentation of
Shochu Distillation Lees (3rd Report) |
Takashi KAWANO*
(*Energy and Environment Development Dept.) |
(Abstract)
We have been developing an alkaline-hydrogen-methane fermentation system
for shochu distillation lees that will convert the energy contained in shochu
lees into biogas, trying to establish its optimum operating condition. A plant
was completed in 2005, and long-term stable operations have been conducted using
lees of potato shochu and barley shochu. The energy recovery ratios, the
percentages of recovered energy against the sum of energy contained in the
shochu lees and the electric power consumption within the system, have been
70.6% with the barley shochu and 63.4% for potato one, both exceeding the
original target of 60%. By converting recovered energy into thermal energy by
means of the boiler, we managed to reduce the amount of fossil fuels
consumption, while lowering the carbon dioxide emission by 62kg per 1m3
of potato shochu lees, and by 98kg per 1m3 of barley shochu lees. This has cut the
total CO2 emission by approximately 950ton／year. In addition, we
haven proven the effectiveness of this system as the operation cost of this
plant is lower than the current disposal cost of lees. |
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The First Public-financed Consolidated Waste
Treatment Facility as a PFI Project
－Operations Report of Iwate Clean Center #2－ |
Kohei KAWAMURA*, Tatsushi KAWAMOTO* and Gentarou
IMAI**
(*Energy Engineering Dept.Ⅱ, **Mechanical Design & Engineering Dept.) |
(Abstract)
Iwate Clean Center #2, operated by Iwate-Kenpoku Clean Co., Ltd., is a
consolidated waste treatment facility consisting of an incineration plant
(80ton／day) and a melting plant (13ton／day), built by public financing as a PFI
(BOO system) project, a first in Iwate Prefecture. The facility was intended to
treat, continuously and properly for 20 years, industrial wastes generated in
the prefecture as well as those illegally dumped near the prefectural border.
Test operation began in December of 2008 proving stable performance. Its
title transfer was completed by March 31, and the commercial operation began on
April 1 of this year.
This article reports on the outline of this plant and the result of its
test operation. |
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