Technologies

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Ebara Engineering Review No.209

Pyrolysis Gasification by an Internally Circulating Fluidized-bed Gasifier

by Yusuke TAMARI, Hiroshi HASHIMOTO, Kenichi SEMITANI, & Nobuhiko HAMANO I

Development is underway for pyrolysis gasification by an ICFG (Internally Circulating Fluidized-bed Gasifier). This next-generation technique has been tested, using a pilot plant at EBARAOs Sodegaura Plant, for more than 2000 hours since 2003. The following discusses basic concepts and results of gasification using wood-based biomass as feedstock. It had been confirmed that relatively high calorific product gas (mainly hydro-carbon) can be produced and that stable rated operation is possible by feeding this product gas to a gas engine or a micro gas turbine.

Keywords
Gasification, Fluidized-bed, Biomass, ICFG, Gas engine, Micro gas turbine, Power generation

A Siloxane Removal Process

by Satoshi YANO, Norio YAMADA, & Takayoshi ADACHI

A siloxane removal process which efficiently and continuously removes siloxanes by a small-scale adsorbent column has been developed. A performance test carried out continuously for over 3000 hours proved its effectiveness. By this process there is no need to exchange the adsorbent and the column is maintenance-free. The process features the TSA (Thermal Swing Adsorption) technique which enables considerable space-saving. Thus, unfavorable effects by siloxanes on generators using biogas at wastewater treatment plants can be prevented.

Keywords
Sewage treatment plant, Digester, Digester biogas, Siloxanes, Silicon oil, Silicon dioxide, Vapor pressure, Hydrocarbon, Resin adsorbent, Thermal swing adsorption

Fuel Cell Co-generation System

by Takashi KAWANISHI, & Noboru MAKITA

EBARA's 1 kW home-use fuel cell co-generation system, which uses polymer electrolyte fuel cells, has started being used by Tokyo Gas Co., Ltd. since February 2005. This system features energy-saving and minimized CO2 emission. Development is underway to enable widespread home-use of this system.

Keywords
Fuel cell, Co-generation system, Polymer electrolyte fuel cell, Global warming

Horizontal Multi-Stage Pump "Model EHM"

by Junya KAWABATA, & Yasutaka KONISHI

A horizontal multi-stage pump capable of handling relatively small amounts of water but with a high head, the Model EHM, has been developed to be used in combination with die temperature regulators, pure water production systems, and cleaning systems. The pump is lightweight, compact, and features low noise and high reliability. Either FC/SUS304 or SCS/SUS316 can be selected as the material for the wetted section of the pump, depending on the quality of the handled liquid. The following outlines this pump which is about to be released into the market and introduces its features.

Keywords
Horizontal multi-stage pump, Stainless sheet metal stamped, Stage casing, Impeller, Axial thrust, Spline shaft, Press fitting

Model Change of the Model F3100 Packaged Booster System

by Takahide KOMATSU, & Kazuhiro KANEDA

The Model F3100 Packaged Booster System has undergone a model change. In the modified system, the detection of water levels in the water reception tanks is facilitated and diagnosis of minor failure is enabled as well. As for water quality, the system satisfies regulations set by the Japanese waterworks law. The system is fully capable of providing safe potable water.

Keywords
Packaged booster system, Inverter, Estimated constant end pressure control, Operating history, High temperature specification, Detection of irregularity in pump starting frequency, Detection of irreguarity in pressure tank, Detection of irreguarity in flow switch, Detection of irreguarity in pressure sensor

Horizontal Axis Large-scale Wind Turbine System for Sakata Wind Power Station

by Kazuhiko SUGIYAMA, Kenji ICHIHARA, & Tsuyoshi TOMITA

In February 2003 a partnership contract was signed between Pfleiderer Wind Energy (a German manufacturer of wind turbines; currently Fuhrlaender Pfleiderer) and EBARA CORPORATION to launch off EBARA Pfleiderer Company Limited, a company involved in the manufacture, sales and after sale service of wind turbine power generation systems in Asia, including the sole rights in Japan for the same. The company started off commercial business in April the same year with a target of providing 700 MW of power in Japan and Asia in the next ten years. In November of 2004 the first wind turbine system (output power 1500 kW) was shipped to Sakata City, Yamagata Prefecture. The order had been placed by Cosmo Oil. The following outlines this power turbine system and introduces its superior features.

Keywords
Wind turbine, Generator, Double-fed induction generator, Pitch control system, Inverter, Speed control, Power control, Power facter control, Remote control, Sakata