(Abstract)
Due to the global shift to greenhouse gas reduction, the reduced use of fossil fuels and the promotion of renewable energy are being accelerated. It is also driving changes in the industrial structure and corresponding shifts in policies around the world, through changes in energy, fuels, industrial raw materials, and industrial processes. The business fields of our company have been greatly affected by this trend and the importance of carbon recycling technology is increasing. Carbon recycling technology is generally referred to as CCUS, which combines carbon capture, utilization, and storage. For CCUS, and also for the shift to CO2 -free raw materials and fuels such as hydrogen, it will be important to strengthen our cooperation with outside parties to promote research and development. This paper outlines the research and development currently being conducted at our company, such as methods for carbon dioxide capture, technology for the agricultural use of CO2, and technology for the solid carbonization of CO2.
(Abstract)
The greenhouse gases emitted from the business activities of the Bureau of Sewerage
Tokyo Metropolitan Government account for 35% of the total emissions from the administrative
business activities of the Tokyo Metropolitan Government (as of FY 2020). The Bureau of
Sewerage Tokyo Metropolitan Government formulated its Earth Plan in 2004, 2010, and 2017 to
show its efforts to systematically promote measures for the prevention of global warming. Based
on this Plan, the Bureau has been promoting thorough energy saving and the expansion of the
use of renewable energy. It has also made a great effort to tackle global warming through the
development of new incineration technologies and by taking the lead in the introduction of the
latest technologies.
This paper introduces these efforts and explains the joint research on energy saving/
energy creation technologies in which our company participated.
(Abstract)
The purpose of our Solution Lab base for remote monitoring and operation support is to
monitor the operational status and working situation of plants in a 24-hour system, to carry out
various operation and management support, and to provide various solutions for the realization
of safe and secure facility operation. The Solution Lab has the same plant monitoring functions as
the central control room of a waste incineration plant, making it possible to monitor the various
operation data and images of the combustion in an incinerator in real time. In addition, partial
revisions of the law on April 1, 2021 have made it possible to conduct the remote monitoring and
operation of waste incineration plants that have a steam turbine. On consideration of this
situation, our company is working on the realization of remote monitoring and operation from
the Solution Lab as one of the solutions for higher quality service provision in facility management for waste incineration plants.
This paper outlines the revisions of the law and reports on our confirmation that stable
operation using remote monitoring and operation is possible through the operation of an actual
facility simulating two operators.
(Abstract)
In the treatment of exhaust gas, there is a long history of proven results for dry type exhaust gas treatment technology, in which acid gas (HCl, SOx) is removed by blowing alkali chemicals such as lime in the upstream of a filtration type dust collector. On the other hand, recent waste incineration facilities have been required to satisfy more severe exhaust gas regulation values as the momentum of environmental load reduction has increased. This paper reports the operation results at the “Machida City Bio-Energy Center” that confirmed the operation with dry type exhaust gas treatment could lower the chimney outlet acid gas concentration to 10 ppm or less.
(Abstract)
Our company has delivered energy saving and energy creation type sewage sludge
incinerating power generation systems to the Tamagawa Joryu Water Reclamation Center of
the Bureau of Sewerage Tokyo Metropolitan Government and the Seibu Sludge Center of
Sapporo City. These systems combine a step grate stoker furnace and steam power generating
equipment that uses the waste heat from the incineration.
In these systems, the installation of a combination of elements such as a sludge dryer, a step
grate stoker furnace, a waste heat boiler, and a steam power generator can realize a drastic
reduction of the power used through low power consumption and steam power generation,
without the use of auxiliary fuel. In addition, high temperature incineration at over 900℃ is
possible and the emission of the greenhouse gas dinitrogen oxide (N2O) can be greatly reduced,
so the systems are effective for energy saving・energy creation, running cost reduction, and
greenhouse gas reduction. As a result of trial calculations, it was shown that a drastic
greenhouse gas reduction of over 95% was possible compared with the conventional incineration
system of a bubble-type fluidized furnace (without power generation).
(Abstract)
The combustion gas purification system (t-CarVe®) that purifies combustion gases exhausted by a biomass power plant and supplies carbon dioxide to horticultural facilities for crop growth has been delivered together with the biomass power plant to F Bit Communications Corp. by our company. We have realized biomass tri-generation system composed of the biomass power plant supplying electricity and heat, and the combustion gas purification system supplying carbon dioxide. The combustion gas purification system in this project has been operated stably. This system is technology which contributes to the solution of the problems of carbon dioxide emission reduction and effective utilization because of using carbon dioxide derived from carbon neutral biomass horticultural facilities.
(Abstract)
Our group started the operation of the Machida City Bio-Energy Center in January, 2022. This facility consists of a heat recovery facility, an incombustible / bulky waste treatment facility, and a biogasification facility. In the heat recovery facility, steam turbine power generation is performed using the waste heat from the incineration of waste. In the biogasification facility, biogas power generation is performed using the biogas generated from the fermentation of waste. This paper reports the features of the heat recovery facility and the biogasification facility and the situation of their operation.
(Abstract)
The “Ariake Sunflower Center” waste treatment facility that the Ariake Living Environment Facilities Association ordered us was completed in February, 2022. The scale of the incineration at this facility is only small, at 92 t/day, but the thermal energy from the incineration of waste is recovered for power generation by a steam turbine generator, and that generation covers the power consumption of the site and produces a surplus for electricity sales. This paper reports the features and operation situation of this facility.
