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| Number | Title | Issue Date |
| 7120218 | Method for calibrating steam generator water level measurement A method is provided for determining and controlling feed water level in a steam generator of a nuclear power plant, whereby the water level sensor is calibrated in terms of the pressure drop across structural components in the feed water path. The water level diffe... | 10/10/2006 |
| 6886502 | Method for controlling steam generators A method of controlling the feedwater flow to the secondary side of a steam generator in a pressurized water nuclear reactor monitors various process variables such as the feedwater and the steam flows and pressures around the secondary side of the steam generator a... | 05/03/2005 |
| 6604491 | Boiler apparatus Disclosed is a boiler apparatus useful for the heating of living and working spaces. The disclosed boiler apparatus incorporates a burner element and controller element that cooperate to provide a modulated firing rate. The modulated firing rate serves to... | 08/12/2003 |
| 6311647 | Method and device for controlling the temperature at the outlet of a steam superheater After the economizer, an injection water pipe branches off the connecting pipe between economizer and evaporator in order to control the steam temperature. The injection water pipe is provided with a control device for controlling the injection water flow... | 11/06/2001 |
| 6173681 | Liquid feed pre-heater The present invention is drawn to a device for heating liquid feed for veal calves, although this device may have wider application. The present invention is a pre-heater system used to raise the temperature of liquid feed that is being pumped from cold s... | 01/16/2001 |
| 6095098 | Computer controlled injection device for generating steam A steam generation device comprising two cylinders, an inner and an outer cylinder, the inner cylinder forming a combustion chamber into which streams of air, water and fuel are released under computer control. Water is introduced under pressure into the ... | 08/01/2000 |
| 5850809 | Steam-raising system A steam-raising system comprising a boiler. The boiler has (a) a passageway for water and/or steam, (b) an inlet to the passageway through which water is introduced continuously for given periods when the boiler is in use, (c) a heater to heat the passage... | 12/22/1998 |
| 5559293 | Steam generation system mass and feedwater control system In a steam generator or boiler of the type having a pressure vessel having a zone in which heated water and steam can be separated, an outlet for the flow of pressurized steam and an outlet for the flow of liquid, a riser section in which fluid passes for... | 09/24/1996 |
| 5406915 | Steam generation system mass and feedwater control system In a steam generator or boiler of the type having a pressure vessel having a zone in which heated water and steam can be separated, an outlet for the flow of pressurized steam and an outlet for the flow of liquid, a riser section in which fluid passes for... | 04/18/1995 |
| 5398644 | Temperature measurement at evaporator outlet A method and a device for temperature measurement of the fluid at the outlet from an evaporator in a boiler of benson type, wherein the evaporator includes one or more inlet headers which are supplied with water passed on to evaporator tubes which communi... | 03/21/1995 |
| 5392739 | Steam-raising system A steam-raising system comprising a boiler, a pump connected by a flow passageway to the boiler to pump water thereto, and flow-control means connected to the flow passageway between the pump and the boiler to control the flow of water from the pump to th... | 02/28/1995 |
| 5249551 | Steam generation system mass and feedwater control system In a steam generator or boiler of the type having a pressure vessel having a zone in which heated water and steam can be separated, an outlet for the flow of pressurized steam and an outlet for the flow of liquid, a riser section in which fluid passes for... | 10/05/1993 |
| 5209188 | Fluid bed combustion reheat steam temperature control A reheat steam temperature control system that utilizes the separate components of a reheater and a reheat heat exchanger to generate hot reheat steam. The reheater uses the fluidized bed as its source of heat while the reheat heat exchanger uses main ste... | 05/11/1993 |
| 5103859 | Float chamber A valve for use in the float chamber of a boiling water unit. The valve consists of a body of circular horizontal cross section having a vertical outer wall. The inner portion of the valve body includes a central circular cut-out seat portion to accommoda... | 04/14/1992 |
| 4953508 | Boiler for steam flatirons, incorporating an improved replenishment manifold The boiler includes a tight receptacle having a replenishment manifold which opens into the receptacle at an intermediate level thereof so as to define a first replenishment level. The boiler also includes a normally closed valve controllable to open for ... | 09/04/1990 |
| 4938173 | Fluid system A fluid system for example for steam raising comprising a flow control device (20), means (28) to supply a head of fluid to the flow control device (20), and at least one fluid using means such as a flash boiler (12-14), the flow control device (20) compr... | 07/03/1990 |
| 4878457 | Zero flash closed condensate boiler feedwater system A heat exchange system for steam returning from industrial processors to a pressurized receiver for return to a boiler with recovery of the thermal energy in the spent steam wherein the flow of water from a flash condenser connected to processor traps is ... | 11/07/1989 |
| 4823767 | Apparatus for steaming food The steamer comprises a first heating chamber (5) intended to generate wet steam from supplied water, and a second heating chamber (6) arranged between the first heating chamber (5) and the cooking chamber (2) and used for heating the wet steam coming fro... | 04/25/1989 |
| 4802446 | Safety device for subcritical pressure steam boilers A safety device for subcritical natural and forced circulation boilers wherein the differential between downcomer fluid temperature and drum saturation temperature is measured and the trend of the differential is determined by computer means on a continuo... | 02/07/1989 |
| 4635589 | Model steam generator having an improved feedwater system A model steam generator including an improved feedwater system for monitoring the conditions of the heat exchange tubes within a nuclear steam generator is disclosed herein. The feedwater system generally comprises a first conduit fluidly connected betwee... | 01/13/1987 |
| 4582025 | Liquid level detector A liquid level detector for low pressure boilers. A boiler tank, from which apor, such as steam, normally exits via a main vent, is provided with a vertical side tube connected to the tank at the desired low liquid level. When the liquid level falls to the... | 04/15/1986 |
| 4552099 | Anticipatory boiler feedpump suction head controller system Boiler feedpump net positive suction head (NPSH) control is performed in a heat recovery steam generator including a deaerator inserted between steam turbine condensate and steam boiler. To this effect apparatus is provided responsive to temperature at th... | 11/12/1985 |
| 4541365 | Method and apparatus for supplying feedwater to a forced flow boiler An apparatus and method of supplying feedwater to a forced flow boiler or the like as described. A positive displacement pump having a plurality of discrete pumping elements is arranged to pump feedwater from an inlet to the boiler. The pump includes bypa... | 09/17/1985 |
| 4526136 | Control system for fluid heated steam generator A control system for controlling the location of the nucleate-boiling region in a fluid heated steam generator comprises means for measuring the temperature gradient (change in temperature per unit length) of the heating fluid along the steam generator; m... | 07/02/1985 |
| 4520762 | Forced through-flow steam generator An economizer is connected to the highest point of the evaporator by an evaporation pipe provided with a valve, in order to operate a forced flow-through steam generator at low costs. During re-filling of the economizer with a small quantity of feed water... | 06/04/1985 |
| 4497283 | Boiler control The control of the actual liquid level in a boiler is accomplished by using the flow rate of the fuel to the combustion system associated with the boiler to generate a signal which is utilized to bias a control signal generated in response to steam flow r... | 02/05/1985 |
| 4457266 | Boiler control The control of the actual liquid level in a boiler is accomplished by using the actual enthalpy of the fluid in the boiler to generate a signal which is utilized to bias the output from a conventional level controller in such a manner that swell and shrin... | 07/03/1984 |
| 4421158 | Coolant recirculation system for dry cleaning plants A coolant recirculating system permits water from a municipal source to be circulated continuously in a dry cleaning plant in order to perform necessary cooling and condensing operations. The water is permitted to be dumped from the closed system only upo... | 12/20/1983 |
| 4407353 | Waste heat recovery device for preventing corrosion by sulfur oxides In a boiler or an industrial furnace, a temperature detecting sensor is mounted at the heat absorbing side of a heat pipe of a waste heat recovery device which is disposed in part of the path of exhaust gas. With an output signal of the temperature detect... | 10/04/1983 |
| 4403575 | Device for preventing flashing to steam in an economizer of a flow through steam generator Device for preventing flashing to steam in an economizer of a flow-through steam generator wherein the economizer has heating surfaces disposed downstream of an evaporator and superheater surfaces in direction of a flue-gas path, including at least one pa... | 09/13/1983 |
| 4320663 | Control system and method for controlling a solar energy plant A solar energy plant comprises a solar energy boiler having pre-heating, evaporation, and superheating stages, and a control system for maintaining constant the temperature and the volume of the superheated steam at the boiler outlet upon variations in th... | 03/23/1982 |
