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Hitz Dehydration System (HDS®) by Zeolite Membrane Element
HDS is a dehydration system which utilizes Hitachi Zosen's new zeolite dehydration membrane element.
The system is capable of efficiently dehydrating and refining various organic solvents including bio-ethanol. The Hitz zeolite membrane element features outstanding durability resulting from its seal-less integrated structure, while the optimized membrane microstructure exercises superior dehydration capabilities over conventional dehydration membranes. In addition, the membrane assembly or module employs a highly reliable and easy-to-maintain modular structure.
As a result, HDS® is a compact and energy-efficient system which consumes by 20-30% less power than a adsorption dehydration which is generally called as Molecular Sieve system. Global demand for bio-ethanol, particularly from the United States and Brazil, is set to rise amidst efforts for reducing CO2 emissions and for the search for alternative energies to replace fossil fuels.
Hitachi Zosen has been engaged for developing and construction for the HDSR for use in the biomass ethanol production process as well as diversifying our membrane product lineup and developing new applications including highly-efficient chemical production systems.
The system is capable of efficiently dehydrating and refining various organic solvents including bio-ethanol. The Hitz zeolite membrane element features outstanding durability resulting from its seal-less integrated structure, while the optimized membrane microstructure exercises superior dehydration capabilities over conventional dehydration membranes. In addition, the membrane assembly or module employs a highly reliable and easy-to-maintain modular structure.
As a result, HDS® is a compact and energy-efficient system which consumes by 20-30% less power than a adsorption dehydration which is generally called as Molecular Sieve system. Global demand for bio-ethanol, particularly from the United States and Brazil, is set to rise amidst efforts for reducing CO2 emissions and for the search for alternative energies to replace fossil fuels.
Hitachi Zosen has been engaged for developing and construction for the HDSR for use in the biomass ethanol production process as well as diversifying our membrane product lineup and developing new applications including highly-efficient chemical production systems.
< Membrane Project, Development Project Department >
OLED Manufacturing Equipment
Organic layer deposition equipment for G3 (600x700mm) substrates
Hitachi Zosen Corporation has participated in the New Energy and Industrial Technology Development Organization (NEDO)’s "Development of Fundamental Technologies for Next-generation Large-screen OLED Displays” project (a “Green-IT Project”) since July 2008, and is aiming to develop OLED film deposition equipment capable of being adapted to substrate sizes of G6 (1500x1850mm) and above.
Organic light emitting diodes (OLEDs) are composed of multiple organic layers several tens of nanometers thick interposed between an anode and a cathode. These organic layers emit light when a direct current is applied between the anode and cathode. Our OLED manufacturing equipment utilizes a proprietary ‘planar evaporation source’ in the organic layer deposition process to deliver a number of features such as:
- (1)the ability to change the vapor deposition orientation to face up, down or sideways;
- (2)the ability to achieve high material utilization of 20% or more on a G2 substrate and 30% or more on a G3 substrate;
- (3)the ability to facilitate the supply of organic materials by providing a material heating component outside of the vacuum chamber;
- (4)the ability to maintain a stable vapor deposition rate during film deposition by providing a valve control mechanism;
- (5)minimal particle (waste) emission accompanying substrate or evaporation source movement through the use of a static film deposition method.
< OLED Project, Development Project Department >
Welding residual stress simulation technology
The local application of heat in welding leads to the generation of residual stress, which in turn causes cold cracking, brittle fractures, fatigue fractures and stress corrosion cracking. In order to reduce this residual stress, we adopt measures such as post-weld heat treatment (PWHT).
We have succeeded in simulating residual stress and the stress-reducing effects of PWHT through the combination of thermo-elastic plastic analysis and thermo-elastic plastic creep analysis using the fine element method (FEM).
We have applied this technology to large steel structures manufactured by our company such as pressure vessels, boilers, steel manufacturing gears and bridges to improve product reliability and reduce manufacturing costs. Knowing in advance the position at which residual stress increases allows us to adopt suitable countermeasures, while understanding the residual stress-reducing effects of PWHT allows us to perform suitable heat treatment and therefore reduce greenhouse gases.
Fig.1 shows an analysis of butt welding on a 98mm thick plate, and Fig.2 is a comparison of the residual stress distribution near the weld with and without PWHT. The figure shows that PWHT significantly reduces residual stress.
We have succeeded in simulating residual stress and the stress-reducing effects of PWHT through the combination of thermo-elastic plastic analysis and thermo-elastic plastic creep analysis using the fine element method (FEM).
We have applied this technology to large steel structures manufactured by our company such as pressure vessels, boilers, steel manufacturing gears and bridges to improve product reliability and reduce manufacturing costs. Knowing in advance the position at which residual stress increases allows us to adopt suitable countermeasures, while understanding the residual stress-reducing effects of PWHT allows us to perform suitable heat treatment and therefore reduce greenhouse gases.
Fig.1 shows an analysis of butt welding on a 98mm thick plate, and Fig.2 is a comparison of the residual stress distribution near the weld with and without PWHT. The figure shows that PWHT significantly reduces residual stress.
< Machinery & Infrastructure Technology Group, Technical Research Institute >
