1319results about "Steam superheaters" patented technology

Disclosed is a process for the preparation of superheated of steam by transferring heat from at least a fraction of a high pressure steam to a lower pressure steam to produce a superheated, lower pressure steam. The high pressure steam can be generated by recovering heat from a heat producing chemical process such as, for example, the partial oxidation of carbonaceous materials. The lower pressure steam can be generated by reducing the pressure of a portion of the high pressure steam or by recovering heat from one or more chemical processes. The superheated, lower pressure steam may used to generate electricity in a steam turbine, operate a steam turbine drive, or as a heat source. Also disclosed is a process for driving a steam turbine using superheated steam produced by the process of the invention.

The invention relates to a method and a system for combining solar energy thermal power generation with biomass power generation. When the method is used for generating electricity in the daytime (a fine day), one path of heat transfer oil heated in a heat collection field passes through a heat exchanger to ensure that counter-flow water is heated up into superheated steam at the temperature of between 360 and 380 DEG C; and the other path of the heat transfer oil heated in the heat collection field passes through the heat exchanger to heat up a fused salt so as to perform energy storage. The water heated in a water cooled wall of a biomass boiler is changed into steam which enters a steam header and a steam-water separator, then is heated to the temperature of between 535 and 545 DDEG C after being sent into a super-heater of the boiler together with the steam at the temperature of between 360 and 380 DEG C, and then is supplied to a steam turbine to drive a generator to finish the power generation process. During receiving electric valley adjustment, the biomass boiler maintains the minimum stable combustion state. The self power generation of the method and the system can be used for supplying electricity to an electric heater in a fused salt heat storage system to heat the fused salt and perform secondary energy storage for a fused salt heat tank. During the night, or when a solar energy condition is not good, the heat energy stored in the fused salt is released by the heat exchanger to generate electricity.

PCT No. PCT/JP97/00573 Sec. 371 Date Jan. 12, 1998 Sec. 102(e) Date Jan. 12, 1998 PCT Filed Feb. 27, 1997 PCT Pub. No. WO97/32161 PCT Pub. Date Sep. 4, 1997According to the present invention, boiler water is pressurized so that its boiling point is set at approximately 200 DEG C. to 320 DEG C. The boiler water is heated in at least two stages. Thermal energy of gases containing chlorine compounds is used to heat the water to its boiling point. Thermal energy of gases which do not contain chlorine compounds is used to heat the water from its boiling point until superheated steam of a given temperature is generated. The heating which uses the thermal energy of gases containing chlorine compounds is accomplished using the thermal energy from the combustion of pyrolysis gases obtained from a pyrolysis means in which waste material is supplied into a chamber containing a fluidized bed medium which has been heated to at least 300 DEG C., and a pyrolytic reaction is induced. The heating which uses the thermal energy of gases which do not contain chlorine compounds is accomplished using the thermal energy obtained from a char combustion means to combust char in which a char mixture consisting of unpyrolyzed residue and fluidized bed medium removed from the pyrolysis means is fluidized by a stream of air, and the unpyrolyzed residue is combusted.

A power plant is provided and includes a gas turbine engine to generate power, a heat recovery steam generator (HRSG) to produce steam from high energy fluids produced from the generation of power in the gas turbine engine, a steam turbine engine to generate additional power from the steam produced in the HRSG and a thermal load reduction system to reduce thermal loading of components of the HRSG and/or the steam turbine engine during at least startup and/or part load operations, which includes an eductor by which a mixture of compressor discharge air and entrained ambient air is injectable into the HRSG and/or an attemperator to cool superheated steam to be transmitted to the steam turbine engine and a detector disposed within the HRSG to facilitate identification of hot spots therein.

The invention is a fluid bed gasification and combustion processing method for urban garbage. The hearth of a fluid bed garbage furnace (4) is composed of two parts of a low temperature gasification area and a high temperature combustion area, additives (f) such as limestone, kaolin, etc. are added to the garbage furnace (4); acid gases such as chlorine, sulfur, nitrogen, etc. are removed in the furnace; and the generation of dioxin is controlled in the furnace. A water cooling spiral slag cooler (5) and a vibration sieve (6) can be utilized to efficiently reduce heat loss of slag and recycle bed materials. The whole system requires no addition of auxiliary fuel, and has the characteristics of safe reliability, no odor emission, low investment and operating cost, less secondary pollutant discharge, high power generation efficiency, etc.

To provide a superheated steam treatment apparatus capable of efficiently treating an object by superheated steam containing a high concentration of hydroxyl radicals. The superheated steam treatment apparatus includes an induction heating unit 4 configured to generate superheated steam by induction heating saturated stream, a treatment chamber 5 configured to allow the superheated steam generated by the induction heating unit 4 to be introduced thereinto, and a discharge treatment unit 6 located in the treatment chamber 5 and configured to treat the introduced superheated steam by discharge. The discharge treatment unit 6 has a frame serving as a support for the discharge treatment unit, a discharge electrode located at an upper part of the frame, a mesh-like opposite electrode located below the discharge electrode, and a high-frequency power source configured to supply high-frequency, high-voltage power between the discharge electrode and the opposite electrode to cause the discharge, whereby an object immediately below the opposite electrode is allowed to be treated by the superheated steam having an increased hydroxyl radical concentration due to the discharge.

An oil shale rotary kiln dry distillation and circulating fluidized bed combustion process makes organic combination of a rotary kiln dry distillation with a circulating fluidized bed; oil shale particles are mixed with thermal-cycle ash from a circulating fluidized bed boiler and part of circulating fluidized bed boiler bottom ash, and then are sent into a rotary kiln for dry distillation to prepare shale oil and dry distillation coal gas; the dry distillation coal gas has a high calorific value; a part of the coal gas is used as recycle wind of a semicoke material recycle device, and enters the circulating fluidized bed boiler with oil shale semicoke particles for combustion, and the residual part is delivered into an internal combustion engine for combustion generation. The invention can increase shale oil and coal gas quality, reduce energy loss and environment pollution, and improve the comprehensive utilization degree.

A method and apparatus for providing steam for a test chamber is provided. The apparatus includes a heating element contained within a vessel which is fluid communication with an exterior reservoir wherein the heating element provides heat to generate steam from the water entering the vessel from the reservoir. The method for generating steam includes providing a chamber configured to contain a fluid insetting water into the chamber from a reservoir external from the chamber, controlling an amount of water inlet into the reservoir substantially equalizing the water level in the reservoir with the water level in the chamber. The method also includes heating the water in the chamber to turn at least some of the water into steam and venting at least some of the steam out of the chamber.

An evaporator including a lower drum, an upper drum, and at least one tube extending between the lower drum and the upper drum. The plurality of tubes have fluid passageways therein extending from the lower drum to the upper drum. A duct is provided having a heating gas passageway provided therein. The at least one tube extends through the heating gas passageway. The fluid passageways define an overall flow path from the lower drum to the upper drum extending in a direction substantially counter-current to an overall flow path defined by the heating gas passageway extending from a gas inlet of the heating gas passageway to a gas outlet thereof.

A process for producing dry alcohol includes at least one stage wherein a gaseous feedstock, which includes alcohol and water, is contacted with carbon monoxide in the presence of a water-gas shift catalyst, at a temperature sufficiently high so that carbon monoxide and water are consumed and carbon dioxide and hydrogen are produced, thereby removing a portion of the water. The process may include multiple stages; the dry alcohol produced contains 99.5 wt. % or greater of alcohol and 0.5 wt. % or less of water. A preferred alcohol is ethanol; dry ethanol can be combined with gasoline to afford a gasohol.

The water-gas shift reaction is exothermic. The heat generated may be used to increase the energy efficiency of the process. In one embodiment, the heat is used to generate high-pressure steam. The high-pressure steam may be used, for example, to convert feedstock to gaseous feedstock or in the operation of a production plant.

The invention relates to a method to recycle saturated steam from waste heat boiler in steel plant to generate. The method is characterized in that the invention comprises a converter, a converter heat recovery boiler, a steam filtering pressure stabilizer, a saturated steam heating furnace, a heating furnace burner, a low pressure turbine, a motor, a condenser, a condensate pump, a cooling tower, a circulating water pump, a deaerator, a water supply pump, a water supply distributor, a blower, an induced draft fan and a chimney. The invention has the advantages of making full use of the current waste heat boiler of the steel plant, adopting the steam filtering pressure stabilizer and the saturated steam heating furnace, improving efficiency by 140 percent compared with the traditional small-sized medium temperature and medium pressure unit and efficiency being 20 percent up higher than that of the most efficient gas turbine in the world.

The invention provides a new method and a device for producing synthetic natural gas. The method comprises continuous process flows of producing methane-rich gas containing over 94 mole percent of methane by using a coal gasification product as a raw material. The method provided by the invention does not use an expensive circulation compressor, reduces the operation cost and reduces the materialrequirements of a reactor, a waste boiler and a steam over-heater. The method has low requirement for catalyst operating temperature; a catalyst bed layer is not easy to cause temperature runaway andcan inhibit carbon precipitation so as to remarkably reduce the energy consumption of a methanation process; and the method has the advantages of reasonable process flows, operability, energy conservation and the like.

A method for upgrading a boiler is provided. When operating at a first capacity, the boiler is used such that an open space is kept in radiation communication with a firebox. The open space is also kept as empty. A first set of water circulation tubes are connected to the boiler cylinder in connection with the ascending tubes. When the boiler is operated at a second capacity, which is higher than the first capacity, at least one additional part is arranged in the open space to expand the basic super heater arrangement. Additionally, or alternatively at the second capacity, a second set of water circulation tubes may be connected to the boiler cylinder in connection with the ascending tubes. The second set of water circulation tube has a capacity exceeding that of the first set of water circulation tubes.

The invention discloses a novel supercritical carbon dioxide coal-fired boiler. The novel supercritical carbon dioxide coal-fired boiler comprises a horizontally arranged hearth, a wall-attached radiation cooling heating surface system, a superheater and reheater system, smoke gas coolers and air preheaters, wherein the wall-attached radiation cooling heating surface system is arranged in the hearth in a graded and segmented mode, the superheater and reheater system is arranged in a horizontal flue in a graded mode, and the smoke gas coolers and the air preheaters are arranged in a tail flue in a graded and flow-dividing mode. The wall-attached radiation cooling heating surface system greatly reduces the length of a high-temperature working medium pipeline, and reduces the number of needed high-temperature convection heating surfaces and high-temperature alloy pipelines, thereby reducing fixed investment of equipment. The superheater and reheater system combines with turbines which are arranged in a multi-stage and multi-axis mode, so the air inlet temperature and the turbine efficiency of the turbine of each grade can be improved. The tail flue comprises an upper-grade smoke gas coal economizer and a lower-grade smoke gas coal economizer which are used for heating a new working medium to meet requirements of an inlet of a primary wall-attached radiation cooling heating surface of the boiler, and the upper-grade air preheater and the lower-grade air preheater are used for heating combustion air, so that the special requirements for hearth combustion and heat transfer of the supercritical working medium circulation are met.

The invention discloses a deep peak shaving system of a thermal power plant. The deep peak shaving system comprises a superheater, a reheater, a high-pressure cylinder, a reheating steam electric regulating valve, a main steam electric regulating valve, a medium-pressure cylinder, a low-pressure cylinder, a condenser, a condensation water pump, a low-pressure heating water feeding heat exchanger,a water feeding pump set, a deaerator, a high-pressure heating water feeding heat exchanger, a steam turbine low-pressure steam extraction system, four-stage extraction, a steam turbine high-pressuresteam extraction system, a high-temperature molten salt water feeding heat exchanger, a high-temperature molten salt pump, a high-temperature molten salt storage tank, a low-temperature molten salt storage tank, a low-temperature molten salt pump, a molten salt preheater, a steam condensation type heat exchanger, a steam non-condensation type heat exchanger, a steam pressure reduction device and the like. According to the system, the molten salt heat storage technology is utilized, redundant steam heat is stored during load reducing peak shaving of a unit, in the process of load increasing peak shaving of the unit, high-temperature molten salt is used for heating high-pressure fed water to reduce steam extraction of a steam turbine, the output of the steam turbine is increased, the heat efficiency of the unit is improved, and the flexible and deep peak shaving of the thermal power plant is realized.

The invention provides a method and a device for collecting the steam of flushing cinder and the afterheat of hot water in an iron-making blast furnace, which belong to the technical field of afterheat recovery. The method comprises the following steps of: delivering the filtered slag quenching water from a conventional blast furnace slag processing system to a circulating pre-heater to heat a working medium, allowing the slag quenching water at a lower temperature from circulating pre-heater to return to the blast furnace to flush slag; introducing the working medium heated by the pre-heater into a circulating evaporator in which the working medium absorbs the heat released in the condensation process of the flushing cinder steam and evaporates and allowing the vaporized steam to drive a steam turbine so as to drive a generator to generate power; and condensing the working medium departing from the steam turbine into liquid, returning the liquid to the circulating pre-heater and evaporator and recycling the liquid by repeated heating and vaporization. The device comprises a flushing cinder steam heat-exchange loop, a slag quenching water heat-exchange circulation loop and a working medium circulation loop. The method and the device have the advantages of maximizing the cyclic utilization of the flushing quenching heat and the water source, reducing the pollution of the flushing cinder steam to the environment and recycling the energy sources and the natural resources.

In one aspect, the invention provides a steam generation apparatus that is liquid fuel fired and addresses conversion of gaseous fuel SIB units to operate with liquid fuel. The invention also relates to a conversion unit for a steam injection boiler, a method for converting a steam injection boiler from gas firing to possible liquid fuel firing and a method for generating steam from a liquid fuel source. The invention employs a fired heater for heating the liquid fuel to a temperature suitable for firing and preheats the water to compensate for the shortfall in heat liberation when a gas boiler is converted to use liquid fuel. In another aspect of the invention, production of steam is achievable consistently by employing step-up heaters with a steam injection boiler. The heaters being connected in parallel to continue heating the water/steam to achieve a higher quality steam over that produced in the boiler while minimizing consideration as to the adverse effects of coil fouling in the boiler.

The invention discloses an integrated tower solar thermal power generation unit employing quicksand to store and transfer heat, and a tower solar thermal power generation unit built by 'quicksand' instead of conduction oil, fused salt or gas and the like to transfer and store heat. The device adopts fluid characteristics of the 'quicksand', and has the characteristics of thermostability, zero pressure, small thermal resistance and low cost of the 'quicksand'; and superheated steam is generated by sensibile heat and high-temperature air carried by the quicksand when flowing through a vapor generator to push a steam turbine generator to generate electricity, therefore, the construction cost of a tower solar thermal power generation unit is reduced by integral design, and a technological base is established for final implementation of parity power generation. The device belongs to the technical field of solar thermal electric power generation.

The invention relates to a circulating fluidized bed reactor designed to be fed with air and convertible to operate with an oxygen-rich mixture, comprising a reaction chamber (1) horizontally bounded by vertical walls, at least two centrifugal separators (2A, 2B) and a heat recovery element called a heat exchanger cage (3), a reactor also comprising means for introducing a fluidization gas into the reaction chamber using at least one wind box (4) placed under the reaction chamber, and for maintaining a circulating fluidized bed of particles in said chamber, means for transferring gas which must be dedusted from the chamber to the separators, means for discharging the particles separated from the separators and means for transferring the dust-free gases from the separators to the exchanger cage. According to the invention:

• • said reaction chamber comprises at least one partially internal vertical partition wall (10) forming two subchambers (1A, 1B) communicating together and each communicating with at least one separator,
  • said exchanger cage (3) comprises a partially internal vertical partition wall (30) forming two subcages (3A, 3B) communicating together and each communicating with at least one separator, these partition walls being arranged in order to create a passage for the flow of the flue gases into one of said subchambers and into one of said subcages corresponding to operation by oxygen feed in the reaction chamber.

The invention relates to an external and internal fire coal integrated combination circulation power generating system and process thereof, the power generating system comprises gasification sub-system, power circulation subsystem and carbon dioxide reclamation subsystem. The process according to the invention includes heating up in external-burning mode in the low-temperature stage of the endothermic process in thermodynamic cycle, obtaining the energy through portion coal gasification, and using internal-burning mode heating up in high temperature stage, obtaining the coal gas energy through portion coal gasification. The advantages of the invention are high heat efficiency, environmentally friendliness and good economy property.