Abstract: There is provided an optical signal processing device capable of RC in a complex space using optical intensity and phase information. An optical modulator controlled by an electric signal processing circuit modulates laser light, which is emitted from a laser light source, at a modulation period either or both of the intensity and phase values of the optical electric field. On the other hand, an input signal is also modulated by the optical modulator at a modulation period in the time domain so as to be an input signal. The converted input signal passes through an optical transmission path and enters an optical circulation circuit via an optical coupler. Part of the circulating light is branched into two by an optical coupler, and the branched light is converted into a complex intermediate signal at a coherent optical receiver. This complex intermediate signal demodulated at the coherent optical receiver is computed at an electric signal processing circuit, and thereby the operation as RC can be performed.

Abstract: There is provided an optical signal processing device capable of RC in a complex space using optical intensity and phase information. An optical modulator controlled by an electric signal processing circuit modulates laser light, which is emitted from a laser light source, at a modulation period either or both of the intensity and phase values of the optical electric field. On the other hand, an input signal is also modulated by the optical modulator at a modulation period in the time domain so as to be an input signal. The converted input signal passes through an optical transmission path and enters an optical circulation circuit via an optical coupler. Part of the circulating light is branched into two by an optical coupler, and the branched light is converted into a complex intermediate signal at a coherent optical receiver. This complex intermediate signal demodulated at the coherent optical receiver is computed at an electric signal processing circuit, and thereby the operation as RC can be performed.

Abstract: A chemical reaction furnace system having a reaction furnace, a reaction gas exhaust flowpath, and a gas scrubbing device in the exhaust flowpath and having a capability of controlling the furnace top pressure is characterized by the provision of a turbine in the exhaust flowpath downstream from the scrubbing device and being operable to recover energy in the reaction gas, a gas bypass flowpath branched from said exhaust flowpath at a point thereof between the scrubbing device and the turbine and bypassing the turbine, and a bypass valve installed in the bypass flowpath, the turbine inlet gas pressure being controlled by a turbine governor.

Abstract: A chemical reaction furnace system having a reaction furnace, a reaction gas exhaust flowpath, and a gas scrubbing device in the exhaust flowpath and having a capability of controlling the furnace top pressure is characterized by the provision of a turbine in the exhaust flowpath downstream from the scrubbing device and being operable to recover energy in the reaction gas, a gas bypass flowpath branched from the exhaust flowpath at a point thereof between the scrubbing device and the turbine and bypassing the turbine, turbine inlet pressure controlling means, and a septum bypass valve installed in the bypass flowpath and operating in response to control by the turbine inlet pressure controlling means to control the turbine inlet gas pressure.

Abstract: A control changeover system in a blast furnace system including a septum valve having a capability of controlling the furnace top pressure in the blast furnace system and a blast furnace gas energy recovery turbine also having a capability of controlling the top pressure by front pressure control is operated with a slight difference between preset values of the top pressure set by a top pressure setter respectively for control by the septum valve and control by the turbine, whereby the predominance in controlling the top pressure between the two control capabilities is automatically changed over from one capability to the other in accordance with an operation of varying the turbine load by means of a load setter provided for the turbine while the two control capabilities are maintained in operative state.