Abstract:
A method for reducing an internal pressure of a vacuum chamber while preventing impurity contamination within the vacuum chamber as much as possible. The method includes: rough pumping reducing an internal pressure of a vacuum chamber (1) by using a roughing pump (2), the roughing pump (2) being a mechanical pump that is capable of reducing the internal pressure of the vacuum chamber (1) to be less than 15 Pa; main pumping reducing the internal pressure of the vacuum chamber (1) by using a main pump (3) after the rough pumping, the main pump (3) being a non-mechanical pump. Transition from the rough pumping to the main pumping is performed when the internal pressure of the vacuum chamber (1) is no less than 15 Pa.
Abstract:
Provided is a water treatment device with which organic substances contained in raw water to be treated are decomposed to thereby alleviate the load to be imposed on a downstream filter and with which it is possible to avoid corrosion of the piping or the like.The water treatment device 12 includes a large-bore channel 22, a small-bore channel 23, and a pressure pump 24 which pressurize raw water 15a to a given pressure, the raw water containing organic substances, and further includes a laser light source 25 and a condensing lens 26 which irradiates laser light 37 upon the pressurized raw water 15a to heat the raw water to a given temperature, wherein the laser light 27 emitted from the laser light source 25 is condensed by the condensing lens 26 on a region 29 that is located in the small-bore channel 23 through which the pressurized raw water 15a flows and that is separated from the wall of the channel, thereby heating the raw water 15a present in this region 29 and yielding supercritical water or subcritical water to decompose the organic substances contained in the raw water 15a.
Abstract:
There is provided a fabrication method for an AA stacked graphene-diamond hybrid material by converting, through a high temperature treatment on diamond, a diamond surface into graphene. According to the present invention, if various types of diamond are maintained at a certain temperature having a stable graphene phase (approximately greater than 1200° C.) in a hydrogen gas atmosphere, two diamond {111} lattice planes are converted into one graphene plate (2:1 conversion), whereby the diamond surface is converted into graphene in a certain thickness, thus to fabricate the AA stacked graphene-diamond hybrid material.
Abstract:
It is described a process for thermal hydrolysis and team explosion of biomass, said method comprising the steps of: (i) leading the biomass approximately continuous to a first preheating step and preheat the biomass, (ii) leading the preheated biomass into at least two reactors sequentially, (iii) heating and pressurising the reactor by addition of steam, (iv) keeping the re-actor(s) at a certain temperature and pressure for a certain time, (v) leading the heated and pressurised biomass from the reactor(s) to a first pressure relief tank without any substantial pressure reduction and quickly relief the pressure of the biomass by means of a nozzle, in order to disintegrate the biomass, (vi) leading the biomass from the first pressure relief tank to a second pressure relief tank having a lower pressure than the pressure of the first pressure relief tank, (vii) leading the so treated biomass to a downstream facility for subsequent treatment. The invention also comprises a device for thermal treatment of biomass.
Abstract:
A method for curing a resin includes the steps of placing the resin into a reaction vessel, drawing a vacuum in the reaction vessel, positioning the reaction vessel in a gaseous coupling fluid, and applying ultrasonic energy to the coupling fluid.
Abstract:
The present invention provides an improved automatic suction structure of a vacuum container. The structure includes a pumping unit, a power supply, a vacuum releaser and a vacuum detector. The structure allows for automatic air suction, automatic detection, safety power disconnection and continuous vacuuming as well as easy operation. The present invention guarantees improved quality and convenient operation.
Abstract:
The vessel of the invention includes a side wall and an end wall, and is characterized in that the end wall is a domed end wall, of thickness EI including an inner layer CI providing corrosion resistance and an outer layer CE of thickness EE at least equal to the thickness EI of the inner layer CI. The inner and outer layers are rigidly joined by a first assembly device. Inner layer CI is formed from a multilayer material including an internal layer CI for providing corrosion resistance and an external layer CIS, the internal CIC and the external CIS layers being rigidly joined by a second assembly device. The invention enables inexpensive manufacture of large vessels.
Abstract:
An exemplary apparatus facilitates the formation of carbon nanotubes with desired tip structures. The apparatus includes a reaction chamber including a gas outlet, and an evacuation device. The reaction chamber is configured for receiving a catalyst from which the carbon nanotubes grow and providing an environment for growing the carbon nanotubes. The evacuation device includes an intake connected with the gas outlet. The evacuation device is configured for reducing an inner pressure in the reaction chamber and inducing the formation of carbon nanotubes with desired tip structures. Methods for synthesizing carbon nanotubes with desired tip structures are also provided.
Abstract:
Disclosed is a reaction apparatus for organic and/or other substance(s) employing supercritical fluid(s) and/or subcritical fluid(s) permitting injection of organic substance(s) and/or other reactant substance(s) in homogeneous state(s) to reactor(s) without occurrence of clogging at location(s) of such injection, and also permitting actuation to occur in industrial fashion and at high energy efficiency. Reactor(s) (12) of this reaction apparatus comprise cylinder(s) (12a) and piston(s) (12b) provided at such cylinder(s) (12a). Actuation in periodic fashion is permitted by operating piston(s) (12b) to compress fluid vapor(s) and obtain supercritical fluid(s) and/or subcritical fluid(s); operating piston(s) (12b) in reverse direction(s) following conclusion of chemical reaction(s) of reactant substance(s), lowering temperature(s) and pressure(s) and stopping reaction(s); and removing, from cylinder(s) (12a), product(s) obtained while at the same time delivering new charge(s) of fluid vapor(s) to cylinder(s) (12a).
Abstract:
This invention relates to a vacuum processing apparatus having vacuum processing chambers the insides of which must be dry cleaned, and to a method of operating such an apparatus. When the vacuum processing chambers are dry-cleaned, dummy substrates are transferred into the vacuum processing chamber by substrates conveyor means from dummy substrate storage means which is disposed in the air atmosphere together with storage means for storing substrates to be processed, and the inside of the vacuum processing chamber is dry-cleaned by generating a plasma. The dummy substrate is returned to the dummy substrate storage means after dry cleaning is completed. Accordingly, any specific mechanism for only the cleaning purpose is not necessary and the construction of the apparatus can be made simple. Furthermore, the dummy substrates used for dry cleaning and the substrates to be processed do not coexist, contamination of the substrates to be processed due to dust and remaining gas can be prevented and the production yield can be high.