Ebara Engineering Review

Stand Face to Face with Black Box(Japanese language only)

Replace 09 Units of Pump for the Cau Do Water Plant with High Efficiency Water Pumps
(The JCM Model Project in Da Nang)

This paper introduces the pumps, facilities and projects we delivered for the Da Nang Water Supply Joint Stock Company (DAWACO) in Vietnam, which were completed in 2017. This project is based on the Joint Crediting Mechanism (JCM) promoted by the government of Japan.

Ebara Vietnam Pump Company Limited

The Vietnam Factory has a site area of 28 680 m2 and produces large scale pump products as its main products. The products of this factory are being introduced not only to Southeast Asia but also to many places across the world.

Introduction of Condition Monitoring System “EBARA Maintenance Cloud”

In recent years, a movement has emerged to work on preventive maintenance by visualizing and monitoring using IoT sensors in equipment maintenance. At present, however, this technology is not widely used in the market. We believe that the reason is that expensive commercially available sensors and condition monitoring systems and the specialized knowledge required for their introduction has hindered their introduction into the market.

Development of Feeding Control System
Utilizing Image Processing for Fluidized-bed Incinerator

We have developed image processing technology to control the amount of waste fed to a fluidized-bed incinerator. The information obtained from image processing of the waste fed into the incinerator is used to control the amount of waste fed into the system and thus improves the combustion stability of the incinerator. We have installed this technology in a fluidized-bed incineration plant and operated for one year. As a result, we confirmed that the CO concentration was reduced. This technology is expected to improve combustion stability of new projects and existing facilities.

Numerical Study of Criteria Proposed by Ohashi and Akimoto
Second Report: CFD of Cavitation Surge Considering the Pressure Wave Propagation within the Piping Systems

CFD analysis was performed on the cavitation surge generated in the contraction channel. The case where pressure waves propagate through the pipeline upstream and downstream of the contraction was compared with those when incompressible assumption was applied. It was found that fluctuations in flow rate and static pressure occurred only downstream of the contraction. In such cases, outlet boundary conditions that can take into account downstream fluid fluctuations are needed.

Development of High-temperature Erosion-corrosion Resistant Thermal Spray Alloy for Biomass Fuel
Report No.1: Alloy Development through Laboratory Testing

The self-fusing alloy spraying, which is performed as a countermeasure to the thinning of the in-bed tube of the fluidized bed boiler , requires periodic maintenance due to erosion-corrosion caused by the synergistic effects of corrosion caused by fuel-derived chlorine and erosion caused by the continuous impingement of the flowing medium. In order to reduce maintenance costs, we have developed a self-fusing alloy with excellent erosion-corrosion resistance. We have developed a small fluidized bed test apparatus that can simulate actual equipment, investigated the effects of constituent elements of SFNi4, a conventional material, developed an improved alloy, and proposed a erosion-corrosion mechanism.

Highlights on Ebara Products in 2021(Japanese language only)