摘要:
The control system for a plant comprises a rectifier connected to a network. The rectifier has a unit for acquiring precise time, a unit for sampling the state quantity on the precise time to convert the state quantity into digital data and a unit for adding the precise time at each sampling timing to the digital data to transmit the digital data each having the precise time to the network. A breaker is connected to the network. The breaker has a unit for receiving, through the network, a control command thereto and a unit for transmitting an operating state thereof to the network. A control apparatus is connected to the network. The control apparatus has a unit for performing an operation process on the digital data transmitted through the communication network and the operating state of the breaker transmitted therethrough and a unit for transmitting the control command through the communication network to the breaker in response to a result of the control operation process of the performing unit.
摘要:
An accident point locating system locates an accident point on a power transmission line. A digital protective control system has a plurality of digital protective controllers that receive state data representing a state of an electric power system and convert the same into corresponding digital state data. An absolute time acquiring means acquires an absolute time when the state data is sampled. A state data processing decides whether any malfunction occurred in the power transmission system on the basis of the digital state and executes a protective operation when it is decided that an accident occurred in the power transmission system. A recording device adds an absolute sampling time to the digital state data and records the digital state data with the absolute time. A digital data sending device provides the digital state data with the absolute time on a communication network. A display operating system connected to the communication network executes displaying operations to monitor the operation and condition of the digital protective controllers. The display operating system has a distance calculating device for calculating a distance between a control station and an accident point by using the plurality of digital state data with the absolute time received from the digital protective controllers and a display for displaying the output of the distance calculating device.
摘要:
A polymerization process, comprises a polymerization vessel, a reflux condenser installed outside the polymerization vessel and a pipe connected between the reflux condenser and a wall of the polymerization vessel with an end thereof opening into a gaseous phase region inside the polymerization vessel, for returning the liquid condensate to the polymerization vessel, wherein said end projects from an inner surface of the wall of the polymerization vessel into the gaseous phase region. In polymerizing a monomer having an ethylenically unsaturated double bond using the polymerization apparatus, the quantity of heat removed by the reflux condenser is increased stepwise or continuously with progress of the polymerization, such that not less than 20% of the total reaction heat generated during the whole course of the polymerization is removed by the reflux condenser. With 100 or more repeated polymerization runs, polymer scale deposition inside the vessel is minimal even below the pipe end.
摘要:
The unreacted gaseous vinyl chloride monomer still remaining in a polymerization reactor from which the polymerizate has been removed can be discharged by blowing steam into the reactor from its top so that the gaseous monomer is pushed downward and moved out from the bottom of the reactor, followed by a conventional treatment for condensation. This method of discharge serves to put the reactor open to the ambient atmosphere without the emission of the unreacted monomer and, as such, solve the problems of the workers' health and environmental pollution.
摘要:
Organohalosilanes are prepared by reacting an organic halide with metallic silicon particles in the presence of a metallic copper catalyst which is a metallic copper powder in flake form having a bulk specific gravity of 1-3 g/cm3 and a mean particle size of 10 &mgr;m to 1 mm as measured by laser diffraction particle size distribution analysis.
摘要翻译:有机卤代硅烷通过在金属铜催化剂的存在下使有机卤化物与金属硅颗粒反应来制备,金属铜催化剂是片状比重为1-3g / cm 3,平均粒径为10〜 通过激光衍射粒度分布分析测量为1mm。
摘要:
A polymerization apparatus, comprises a polymerization vessel, a reflux condenser installed outside the polymerization vessel and a pipe connected between the reflux condenser and a wall of the polymerization vessel with an end thereof opening into a gaseous phase region inside the polymerization vessel, for returning the liquid condensate to the polymerization vessel, wherein said end projects from an inner surface of the wall of the polymerization vessel into the gaseous phase region. In polymerizing a monomer having an ethylenically unsaturated double bond using the polymerization apparatus, the quantity of heat removed by the reflux condenser is increased stepwise or continuously with progress of the polymerization, such that not less than 20% of the total reaction heat generated during the whole course of the polymerization is removed by the reflux condenser. With 100 or more repeated polymerization runs, polymer scale deposition inside the vessel is minimal even below the pipe end.
摘要:
A polymerization method used, particularly, in suspension polymerization of vinyl chloride, comprising a polymerization vessel (1) having a substantially cylindrical inner space, said inner space of said polymerization vessel being provided with a plurality of baffles (5) comprising vertically extending pipes, and a vertically continuously extending coil (6), and a refrigerant being passed through said baffles and said coil. High-cooling performance can be obtained, a high-speed reaction in a large-sized polymerization vessel becomes possible, and a stable polymerization reaction can be carried out. A high-quality and uniform polymer that has few fish eyes and has a high bulk specific gravity can be obtained.
摘要:
A Power system protection and control system has protection and control terminals that perform protection and control of a power system by operation of a plurality of CBs in response to state variables input from power system; and a power system monitoring and control host mutually connected in a fashion to permit data exchange through a transmission system (communication network) with protection and control terminals and that performs monitoring and control of power system in accordance with data transmitted from protection and control terminals. Protection and control terminals each has a correlation circuit that performs correlation of an operated CB and the cause of its operation, using information sent from protective relay circuit, CB control circuit, re-closure circuit and CB state receiving circuit when at least one of a plurality of CBs is operated, and a correlation result transmission circuit that transmits the result obtained by the correlation processing of this correlation circuit to power system monitoring and control host through transmission system. The power system monitoring and control host includes a correlation result transmission unit that receives and displays the correlation result transmitted through transmission system from correlation result transmission circuit, associated message file storage unit and CB operation display unit.
摘要:
In the synthesis of organohalosilanes by the direct process of reacting an organic halogen with metallic silicon powder, a metallic copper catalyst in the form of a thermally active metallic copper powder having large strain energy is used.
摘要:
A diorganodichlorosilane is prepared by subjecting organochlorosilanes to disproportionation reaction in the co-presence of a SiH group-containing compound and in the presence of a primary catalyst of AlCl3 or AlBr3 and a co-catalyst of Mg, Al, Ca, Ti, Fe, Ni, Cu, Zn or Sn or a compound thereof. The invention enables disproportionation reaction of organochlorosilanes under atmospheric pressure and at a low temperature at which no substantial sublimation of AlCl3 or the like occurs, thus allowing the reaction equipment to be simple and improving the safety of reaction.