A steam turbine plant partially utilizes a hydrocarbon fuel such as an LNG as a fuel to improve the efficiency of the plant. A steam turbine plant includes a boiler, a steam turbine, a feedwater system, and a superheating combustor. The boiler generates steam, and the steam turbine is driven by the steam generated in the boiler. The feedwater system recovers the steam exhausted from the steam turbine and supplies the steam to the boiler as a feedwater. The superheating combustor is provided between the boiler and the steam turbine, wherein fuel originated from hydrocarbon fuel and oxidizer are mixed with the steam generated in the boiler and combusted in the superheating combustor to increase the temperature of the steam.

Steam turbine plant

A farmland management system includes an information detection unit configured to acquire information relating to a crop being cultivated, a storage unit configured to store crop registration information for estimating a growth condition of the crop, a growth estimation unit configured to refer to the crop registration information and estimate the growth condition of the crop based on the information relating to the crop and the crop registration information, and a display unit configured to display the growth condition estimated by the growth estimation unit.

Farmland management system and farmland management method

An improved broadband omnidirectional antenna is distinguished by the following features: - the omnidirectional antenna is in the form of a dual-polarized antenna, - the dual-polarized antenna comprises a horizontally polarized radiating element (3) in addition to the vertically polarized radiating element (1; 1a, 1b) which is in the form of a monopole, - the horizontally polarized radiating element (3) comprises slots (43, 43') which are provided offset in the circumferential direction in the casing (11a) of the vertically polarized radiating element (1; 1a, 1b) which is in the form of a monopole, a feed device (111) for the horizontally polarized radiating element (3) being provided in the interior (11d) of the vertically polarized radiating element (1; 1a, 1b) which is in the form of a monopole, and - the feed device (111) comprises separate feed devices (111a) for a plurality of slots (43, 43'), the respectively associated slots (43, 43') being separately excited by means of said feed devices.

Broadband omnidirectional antenna

Provided is a drainage collection system capable of reducing the power for driving the water supply pump and of being operated at low cost. The system is provided with: a buffer tank (30) for holding drainage generated in load equipment (20); an assist tank (40) disposed lower than the buffer tank (30); a first drainage supply line (L2) connecting the load equipment (20) with the buffer tank (30); a second drainage supply line (L3) connecting the buffer tank (30) and the assist tank (40); a drainage supply valve (71) that opens and closes the second drainage supply line (L3); a communicating line (L6) for allowing the assist tank (40) to communicate with the buffer tank (30); a communicating valve (73) that opens and closes the communicating line (L6); a steam supply line (L4) that supplies steam from a boiler (10) to the assist tank (40); a steam supply valve (72) that opens and closes the steam supply line (L4); a water supply line (L7) that supplies drainage from the assist tank (40) to the boiler (10); and a water supply pump (60) disposed in the water supply line (L7).

Drain recovery system

The invention comprises a compressed air energy storing system for cold and heat power supply. The system comprises a compressor, an air storage tank, a turbine expander, a gas engine and a refrigerating machine. During low power consumption, surplus power drives the compressor to store the air into the air storage tank in a high pressure manner, and the intercooler of the compressor recovers the compression heat; during high power consumption, the high-pressure air of the air storage tank is preheated through a heat regenerator to enter the turbine expander so as to work and drive a generator to generate power, the exhaust gas of the outlet of the turbine expander enters the gas engine to mix with the natural gas and burn so as to drive the generator to generate power secondarily, the heat of the high-temperature flue gas exhausted by the gas engine is exchanged through the heat regenerator, and the flue gas enters the refrigerating machine with the engine cylinder sleeve circulating water and water heated by the intercooler so as to drive the refrigerating machine to supply heat or cold. According to the system, distribution type energy and intermittent type energy are combined, the renewable energy is utilized fully, the system waste heat is utilized effectively, and the system has the advantages of high energy converting efficiency and large energy storage capacity.

Compressed air energy storing system for cold and heat power supply

PROBLEM TO BE SOLVED: To provide a geothermal power generator utilizing solar heat capable of effectively utilizing ground heat and solar heat, and improving efficiency of generating electricity. SOLUTION: The generator 1 comprises a water vapor taking equipment 2 for taking water vapor out of the earth, a heat exchanger 4 for vaporizing a low boiling point medium having a lower boiling point than that of water to form steam by heat exchange with the water vapor taken out of the earth, a solar heat collector 5 for collecting solar heat, a solar heat receiver 6 for receiving the solar heat collected and heating the steam formed at the heat exchanger 4 to a temperature higher than a saturated steam temperature to form superheated steam by heat exchange with the solar heat received, a steam turbine 7 for generating electricity by the use of the formed superheated steam, and a dynamo 8. COPYRIGHT: (C)2011,JPO&INPIT

Geothermal power generator utilizing solar heat

PROBLEM TO BE SOLVED: To prevent an abnormal combustion such as an explosion of an exhaust gas discharged from a preheating chamber, when melting a cold iron source with the use of a melting facility having the preheating chamber of a shaft type, and to prevent generation of harmful components such as dioxins in the exhaust gas, and generation of a white smoke or an offensive odor. SOLUTION: In the melting process with the use of an arc melting facility 1 which has a melting chamber 2 and the preheating chamber 3 of the shaft type directly connecting to the top thereof, and preheats the cold iron source 16 in the preheating chamber with an effluent gas generated in the melting chamber, this melting method is characterized by melting the cold iron source in the melting chamber by means of arc heating and supplying carbon materials and oxygen to the melting chamber, while supplying the cold iron source to the preheating chamber so as to keep the condition that the cold iron source exists in both the preheating chamber and the melting chamber; and by burning combustible components in the exhaust gas exhausted from the preheating chamber with an oxygen-containing gas or a burner 32, at the closest point to an outlet of the preheating chamber, to heat the exhaust gas to a predetermined temperature or higher, when a predetermined amount of the molten metal 17 is accumulated in the melting chamber, and the molten metal is tapped out, in the presence of the cold iron source in the melting chamber and the preheating chamber. COPYRIGHT: (C)2003,JPO

Method and facility for melting cold iron source

PROBLEM TO BE SOLVED: To provide a waste power generator utilizing solar heat which improves utilization efficiency of exhaust steam in a steam turbine generated from waste treatment furnace facility.SOLUTION: The waste power generator utilizing solar heat includes: a boiler 51 which recovers heat from exhaust gas of a waste treatment furnace 50 to generate steam; a steam turbine power generator 52 which generates electricity with the steam from the boiler 51; a steam utilizing heat exchanger 10 which utilizes part of the steam form the boiler; a low-boiling medium evaporator 20 which generates low-boiling medium steam by heat exchange using at least one of the exhaust steam from the steam turbine power generator 52, the exhaust steam from the steam utilizing heat exchanger 10 and a steam drain; a solar heat collector 30 which collects solar heat; a steam superheating device 40 with solar heat receiving, which receives the collected solar heat and heats the low-boiling medium steam from the low-boiling medium evaporator up to higher temperature than saturated steam temperature to generate low-boiling medium superheated steam; and a low-boiling medium steam turbine generator 56 which generates electricity with the low-boiling medium superheated steam.

Waste power generator utilizing solar heat

PROBLEM TO BE SOLVED: To provide a waste incinerator and a waste incineration method that can stably perform low air ratio combustion.SOLUTION: A waste incinerator includes: a combustion chamber 2 for burning waste on a grate 5; primary air blowing means for blowing combustion primary air from the lower side of the grate into the combustion chamber 2; and high temperature gas blowing means for blowing high temperature gas downwardly from a ceiling of the combustion chamber 2. The high temperature gas blowing means includes high temperature gas blowing-in ports 13, 15 at two stages comprising a front stage and a rear stage in the incinerator length direction that is the movement direction of the waste on the grate. The high temperature gas blowing means is disposed at a position where high temperature gas is blown from the high temperature gas blowing-in port at the front stage toward a region from a combustion start region A2 to a front part of a main combustion region A3 in the incinerator length direction and where high temperature gas from the high temperature gas blowing-in port at the rear stage is blown toward a region from a rear part of the main combustion region to a front part of a rear combustion region A4 in the incinerator length direction. A flue 12 for discharging gas within the combustion chamber 2 is installed in the middle of the high temperature gas blowing-in port 13 at the front stage and the high temperature gas blowing-in port 15 at the rear stage on the combustion chamber ceiling.

Waste incinerator and waste incineration method

PROBLEM TO BE SOLVED: To provide a melting method of cold iron source which can preheat the cold iron source in the following charge and attain such an extremely high efficiency as not be obtained in the conventional melting equipment without particularly needing a device for carrying and supplying the cold iron source into a melting chamber, and an melting equipment thereof. SOLUTION: The cold iron source is melted by using a melting furnace 1 and an arc-melting equipment having a preheating shaft 2 connected with the upper part of the melting furnace. In this case, the cold iron source 3 is melted with the arc 7 wile continuously or intermittently supplying the cold iron source 3 into the preheating shaft 2 so that the cold iron source 3 holds the state of continuously existing in the melting furnace 1 and the preheating shaft 2. At this time, oxygen-containing gas is supplied into the cold iron source charging position from gas introducing holes 16 formed in plural steps in the range from molten iron surface position in the chamber of the melting furnace 1 to the upper end position of the cold iron source at the upper part of the preheating shaft 2 to burn unburning gas produced from the melting furnace 1. At the point of time when the prescribed quantity of molten steel is stored in the melting furnace 1, the molten steel is tapped under existing condition of the cold iron source 3 in the melting furnace 1 and the preheating shaft 2.

Nakayama Takeshi

Papers

Geothermal power generator utilizing solar heat

Method and facility for melting cold iron source

Waste power generator utilizing solar heat

Waste incinerator and waste incineration method

Method for melting cold iron source and melting equipment thereof