Abstract:
A process and an apparatus for converting solid organic materials into carbon or activated carbon. The processing of solid organic materials is oxygen-free and wholly under endothermic condition. The apparatus comprises a pressure vessel (1), thermal insulation with protective cladding for pressure vessel (2), a perforated or non-perforated rotary drum (3), a sealed dish end (4), a rotating shaft (5), a geared motor with belt or chain drive (6), a steam super heater (7) for generating superheated steam, at least one inlet valve (8) for regulating the super heated steam, at least one feed pipe (9), tilting or swivel support (10), at least one cylindrical roller (11), an open or close door end (12), a feeding or removal port (13), a connecting chute (14), at least one pressure safety valve (15), a gas exit pipe (16), at least one outlet valve (17), a gas treatment unit (18) for treating the generated reaction gases, at least one pressure gauge (19) and at least one temperature indicator (20). The pressure vessel is tilted along with its accessories supported on a tilting or swivel support and solid organic materials are feeded into the rotary drum and then realigned. Gas or steam is feeded inside the pressure vessel till the entire air inside the pressure vessel is purged out and thereafter superheated steam continuously feeded into the rotary drum. The rotary drum is constantly rotated by geared motor and generated reaction gases are evacuated from the pressure vessel to the gas treatment unit wherein the organic solid materials are converted into carbon or activated carbon.
Abstract:
A reactor for treating a material in a medium. It includes a body (2) in which is defined a reaction area (10) capable of containing a reaction medium, at least one inlet for introducing the reaction medium into the reaction area, one outlet for discharging effluents out of the reaction area. A protective casing (8) positioned inside the body (2) delimits the reaction area (10). It is spaced apart from the body in order to delimit a confinement area (12) isolating the reaction area of the body. The reaction area and the confinement area are sealably isolated from each other.
Abstract:
The present invention relates to a high-pressure fluidized bed reactor for preparing granular polycrystalline silicon, comprising (a) a reactor tube, (b) a reactor shell encompassing the reactor tube, (c) an inner zone formed within the reactor tube, where a silicon particle bed is formed and silicon deposition occurs, and an outer zone formed in between the reactor shell and the reactor tube, which is maintained under the inert gas atmosphere, and (d) a controlling means to keep the difference between pressures in the inner zone and the outer zone being maintained within the range of 0 to 1 bar, thereby enabling to maintain physical stability of the reactor tube and efficiently prepare granular polycrystalline silicon even at relatively high reaction pressure.
Abstract:
A process unit comprising: (a) a first microchannel module comprising: (i) a first unit operation including microchannels, in which at least a portion of a unit operation takes place, adapted to be in fluid communication with a first inlet stream and a first outlet stream, and (ii) a second unit operation including microchannels adapted to be in thermal communication with the first unit operation, the second unit operation adapted to be in fluid communication with a second inlet stream and a second outlet stream; and (b) a pressurized vessel at least partially containing the first microchannel module adapted to be concurrently occupied by a compressive medium in thermal communication with the first microchannel module.
Abstract:
The invention relates first of all to a method for manufacturing a pressure vessel of a pressurized-water reactor of a nuclear power station, which pressure vessel comprises a pressure resistant casing and which is being used filled with a medium in high pressure in order to utilize heat, being generated as a result of a nuclear reaction taking place in an internal space (13) of the pressure vessel, by means of a heat exchange arrangement or like, being in connection with the pressure vessel. A casing of a pressure vessel (1) of a pressurized water reactor, is being manufactured from two or more shell structures (5, 6) existing one within the other, whereby an essentially lower pressure than the pressure existing in an internal space (13) of the pressure vessel is being arranged in an intermediate space (12) between the shell structures. The invention relates also to a pressure vessel of a pressurized-water reactor of a nuclear power station and to use of a multiwalled pressure vessel for the above purpose.
Abstract:
A method of starting up and shutting down a microchannel process is provided. Included are the steps of providing a first multi-planar process unit, preferably adapted to process an endothermic reaction, a second multi-planar process unit, preferably adapted to process an exothermic reaction, providing a containment vessel, the containment vessel containing at least a portion of the first, and preferably the second, process unit. In startup, the microchannel process is first checked for pressure integrity by pressurizing and checking the important components of the process for leaks. Subsequently, the process units are heated by introducing a dilute low-thermal energy density material, preferably to the second process unit, followed by the introduction of a dilute high-thermal energy density material, and adjusting the proportion of high-thermal energy density material as required. In shutdown, a purge material from the containment vessel is introduced into the first, and preferably the second, process unit.
Abstract:
A method for producing a poly(vinyl chloride) comprises polymerizing vinyl chloride or a mixture of copolymerizable monomers containing vinyl chloride as the main component, in an aqueous medium, wherein the polymerization is carried out in a reaction vessel which is formed by arranging partition plates at certain intervals at right angles to the outer surface of an inner barrel and overlaying outer strips on and between the free ends of the partition plates to thereby form a flow passage unit having a flow passage for a heating medium defined by the partition plates, the inner barrel and the outer strips ("a temperature control element"); fixing the temperature control element in a vessel body so as to oppose the side of the outer strips with a gap to the inner surface of the vessel body, and sealing the upper and lower portions of the gap formed between the outer strip side of the temperature control element and the inner surface of the vessel body to form a gap chamber.
Abstract:
A safety apparatus has been found for controlling the release of flashing hydrogen fluoride in a hydrocarbon alkylation process. The safety apparatus comprises containment baffles enclosing major process vessels. The safety apparatus may be used in combination with a liquid onium polyhydrogen fluoride complex to substantially reduce the vapor cloud produced from a leaking process vessel.
Abstract:
Apparatus and methods are provided for converting methane in a feed stream to acetylene. A hydrocarbon stream is introduced into a supersonic reactor and pyrolyzed to convert at least a portion of the methane to acetylene. The reactor effluent stream may be treated to convert acetylene to another hydrocarbon process.