848 results about "Steam power" patented technology

The invention discloses a combined power circulating method capable of catching carbon dioxide (CO2) by using LNG (Liquefied Natural Gas) cold energy and a system thereof. The system comprises an air separation device, an oxygen-enriched-combustion gas turbine circulation device, a high-pressure steam power circulation device, a CO2 separation and liquefaction device and an LNG cold energy power circulation device, wherein the air separation device, the oxygen-enriched-combustion gas turbine circulation device, the high-pressure steam power circulation device, the CO2 separation and liquefaction device and the LNG cold energy power circulation device utilize the LNG cold energy. According to the method and the system, electricity and high-temperature fume which is rich in CO2 and water are generated from LNG through the oxygen-enriched-combustion gas turbine circulation device, and heat is recovered from the fume through the high-pressure steam power circulation device, so as to produce high-temperature and high-pressure steam with the pressure over 18MPa and increase the power generation efficiency of natural gas; moreover, the LNG cold energy is sequentially applied to the air separation device, the LNG cold energy power circulation device and the CO2 separation and liquefaction device, and the energy consumption for CO2 catching is lowered by making full use of the LNG cold energy, so that combined power cycle has relatively high power generation efficiency and relatively high CO2 catching rate, and the efficient utilization of the LNG cold energy is realized.

LNG cold is used in a plurality of cycles in a combined power plant to increase power output. Especially preferred plant configurations integrate a combined cycle power plant with a regasification operation in which in a first stage LNG cold provides cooling in an open or closed power cycle. Most preferably, a significant portion of the LNG is vaporized in the first stage. In a second stage LNG cold provides cooling for a heat transfer medium that is used to provide refrigeration for the cooling water to a steam power turbine and for an air intake chiller of a combustion turbine in the power plant.

The invention relates to a heat radiator with an air pump separate type thermosiphon for a machine room or machine cabinet, which belongs to the technical field of heat exchange of heat radiators. The heat radiator comprises an evaporator (1), a condenser (4), a liquid collecting pipe (6), a steam pipe (2), an air pump (3) and a liquid storage bend (5), wherein the condenser (4) is positioned on the upper part of the evaporator (1), the upper part of the evaporator (1) is communicated with the condenser (4) by the steam pipe (2) and the air pump (3), the bottom of the evaporator (1) is communicated with the bottom of the condenser through the liquid collecting pipe and a liquid storage bend, a seal space is formed in the hear radiator, and liquid working media are filled into the seal space. After the evaporator absorbs heat, the internal liquid working media in the seal space are gasified, steam is transmitted to the condenser by the air pump through the steam pipe, the liquid working media change into liquid after radiating heat to air around in the condenser and flow back to the evaporator through the liquid storage bend and the liquid collecting pipe, and thus, the heat radiator can radiate internal heat of a seal machine room to the atmosphere, increases the steam power of the working media and the utilization ratio of the condenser and has better heat radiating performance in a larger heat radiating range.

A high efficiency combined cycle internal combustion and steam engine includes a cylinder having a piston mounted for reciprocation therein with an internal combustion chamber outward of the piston, a fixed cylinder cap sealingly and slideably mounted within the piston and a steam expansion/recompression chamber inside the piston adjacent the cylinder cap. The cylinder cap can be unheated or heated externally to reduce condensation of steam entering the steam chamber from a steam generator fired by waste combustion heat. Steam remaining in the cylinder when a steam exhaust valve closes at the top center position is recompressed during an inward stroke of the piston up to admission pressure prior to admitting the next charge of steam. One valve or a pair of retractable steam inlet valves connected in series within the cylinder cap act in cooperation with steam recompression and clearance volume to achieve an effective zero steam chamber clearance and a gain in mean Rankine cycle temperature to maximize efficiency. The amount of steam admitted each outward stroke is continuously regulated, e.g. by shifting the phase of one steam admission valve of a pair to vary their overlap for determining the steam mass admitted during each cycle to reduce specific fuel consumption. Other valves balance steam displacement with the steam generator output to use steam more efficiently. Engine coolant can be evaporated in a combustion chamber cooling jacket to form steam which is then superheated in a combustion exhaust manifold.

The integration of plasma processes with combined cycle power plant, simple cycle power plant, and steam reforming processes. A method of producing purified hydrogen gas and fuel is described including compressing a feed stream of hydrogen, adding tail gas from a plasma process to the feed stream, passing the tail gas modified feed stream into a pressure swing adsorption system generating a purified hydrogen product and a pressure swing adsorption tail gas, separating and compressing the purified hydrogen product, and separating and compressing the pressure swing adsorption tail gas for use as fuel. A method of generating and recapturing electricity from a single or combined cycle power plant is also described including flowing natural gas into a plasma process and hydrogen generating plant, flowing the hydrogen produced into the power plant, flowing natural gas into the power plant, resulting in the production of electricity. The electricity is flowed back into the plasma process plant, and in the case of the combined cycle power plant the electricity is partially flowed into a power grid as well. A method of generating and recapturing electricity from a steam power plant is also described, including inputting electricity and natural gas into a plasma process air and hydrogen generating plant, flowing the air and hydrogen produced into a steam generating boiler, flowing the steam generated into a steam power plant, resulting in the production of electricity which is flowed back into the plasma process plant.

A solar hybrid combined cycle gas-steam power plant and method including a solar unit, a gas turbine unit and a steam turbine unit. The solar unit includes a receiver. The gas turbine unit includes a gas turbine with a waste heat boiler arranged downstream, and a steam turbine with a feed water heater. The power plant includes a heat transfer medium cycle for transferring solar heat. The heat transfer medium cycle is coupled to the gas turbine unit through a gas turbine heat exchanger and to the steam turbine unit through a solar boiler. Alternatively to the gas turbine unit and the steam turbine unit, the solar hybrid combined cycle power plant includes an integrated gas-steam turbine having a waste heat boiler arranged downstream, wherein the heat transfer medium cycle is coupled to the integrated gas-steam turbine through the gas turbine heat exchanger and through the solar boiler.

The invention discloses a multi-system joint optimization dispatching method and device. The method comprises the steps of obtaining related data of a gas-steam-power system of an iron and steel enterprise; determining performance models of various energy conversion devices in the gas-steam-power system; determining a sub-medium energy pipe network model; setting the number of time frames included in the whole optimization dispatching cycle to obtain input data; building a joint optimization dispatching model of the gas-steam-power system; solving the joint optimization dispatching model by adopting a chaos particle swarm algorithm to obtain optimization schemes of gas distribution, steam and power production and purchased power transmission of the whole gas-steam-power system; and generating final optimization schemes of gas distribution of various energy conversion devices, steam and power load distribution, energy distribution of various production users and purchased power transmission and an optimal comprehensive target function index. According to the multi-system joint optimization dispatching method and device, joint optimization of a multi-energy medium is achieved.

A hybrid power generation system using a supercritical CO₂ cycle includes a steam power generation unit including a plurality of turbines driven with steam heated using heat generated by a boiler to produce electric power, and a supercritical CO₂ power generation unit including an S—CO₂ heater for heating a supercritical CO₂ fluid, a turbine driven by the supercritical CO₂ fluid, a precooler for lowering a temperature of the supercritical CO₂ fluid passing through the turbine, and a main compressor for pressurizing the supercritical CO₂ fluid, so as to produce electric power. The steam power generation unit and the supercritical CO₂ power generation unit share the boiler. The hybrid power generation system may improve both the power generation efficiencies of the steam cycle and the supercritical CO₂ cycle by interconnecting the steam cycle and the supercritical CO₂ cycle.

The present invention discloses a series-connected sludge anhydration system by utilizing waste heat of steam-power plant smoke. Said series-connected sludge anhydration system includes heat supply system, sludge pretreatment system, feeding system, sludge anhydration and granulation system and dust-removing and gas-removing system.

The invention discloses an integrated method and device for sludge drying incineration and power generation. The device of the invention comprises a screw rotary type sludge drier; dried sludge enters a fluidized bed boiler to be performed with incineration; steam generated by incineration is used for carrying out power generation; exhaust steam from a small steam turbine is adopted to dry the sludge, thereby realizing cascade utilization of steam heat energy; the electric energy generated by a small generator set can sufficiently meet power utilization in the operation of equipment, thus reducing the operating cost and fully saving energy; and sludge drying incineration and power generation are integrated into a whole. In the invention, the screw rotary type sludge drier is used for feeding the fluidized bed incineration boiler, the steam generated by incineration is used for carrying out power generation, and the low-grade exhaust steam from the steam turbine is adopted as the heat source of the drier, thereby greatly improving the heat efficiency of a steam power device; meantime, the electric energy generated by the small generator set can sufficiently meet power utilization in the operation of the equipment, thus reducing the operating cost; and with the integration design, the system has reasonable and compact connection of the integrated device, mature equipment structure and better economical efficiency.

A run-up method for a solar steam power plant is proposed. In the run-up method an auxiliary steam is used to generate seal steam for a steam-turbine of the power plant. The auxiliary steam is produced by a heat-exchanger-system that is to provide, during a subsequent power-mode, overheated steam for driving the steam-turbine.

The invention discloses a garbage disposal waste heat power generation system with an internal steam pipe, which comprises a garbage gasifier and a turbine steam power generation device. The turbine steam power generation device comprises a steam generator, a steam discharge pipe, a steam drum, a steam turbine and a power generator, wherein the steam drum, the steam turbine and the power generator are sequentially connected, and the steam generator is arranged in the garbage gasifier and is of a cylindrical cage type structure comprising an upper annular pipe, a plurality of straight pipes and a lower annular pipe. As the steam generator is arranged in the garbage gasifier to realize primary heat exchange and a heat exchanger is additionally arranged in a flue gas channel to realize secondary utilization, heat generated in garbage disposal is used to the maximum extent, the technique with low heat utilization rate of a waste heat boiler for traditional garbage disposal steam power generation in the past is thoroughly changed, and garbage disposal heat recovery is maximized. Owing to a four-step hydraulic pusher, garbage is increasingly looser in the process of entering the garbage gasifier, and is not blocked.

The invention discloses a regenerative cycle and low-temperature multi-effect distillation seawater desalinization thermodynamic cycling device, which is formed by coupling a chemical regenerative cycle and a low-temperature multi-effect distillation seawater desalinization system, wherein the flue gas waste heat of the chemical regenerative cycle is used for producing steam power to drive the low-temperature multi-effect distillation seawater desalinization system; fresh water produced by the low-temperature multi-effect distillation seawater desalinization system is supplied to satisfy the needs of reaction in the chemical regenerative cycle; the advantages of the chemical regenerative cycle and the low-temperature multi-effect distillation seawater desalinization system are complemented; and the system realizes integrated optimization. In the process of recycling the flue gas waste heat, a regenerator, a reformer and a waste heat boiler are arranged according to temperature corresponding and energy cascade-utilization principles, and as reforming temperatures of different fuels such as natural gas and methanol, a system structure is required to be correspondingly regulated to realize optimal heat exchange matching. Compared with a separate production system with the same output, the system can improve the efficiency by 5 to 9 percent and save 11 to 19 percent of fossil fuels. Therefore, the device has high economy and vast engineering application prospect.

The invention discloses a method and device for operation optimization of a steam power system. The method includes the steps that performance characteristic parameters and technological parameters of various devices of the steam power system are determined; a nonlinear mathematical model of the steam power system is established according to the energy conservation equation, the mass conservation equation and the performance characteristic parameters and technological parameters of the devices; solution simulation is carried out on the nonlinear mathematical model to obtain a simulation calculation result; the value ranges of optimization variables in the nonlinear mathematical model and the optimized objective function of the nonlinear mathematical model are set; the simulation calculation result serves as an initial feasible solution of the nonlinear mathematical model, optimized solution is conducted on the nonlinear mathematical model through a mixed optimization method of a sequential quadratic programming method and a sequential linear programming method within the value ranges of the optimization variables to obtain an optimized solution result; whether the optimized solution result enables the optimized objective function to be minimum within the value ranges of the optimization variables or not is judged, and if the optimized solution result enables the optimized objective function to be minimum within the value ranges of the optimization variables, the optimized solution result is used as an operating parameter of a steam power model.

In a system for effecting pressure control in a thermal power plant operated at low load connected fluidly in series, a relief conduit is disclosed herein. The relief conduit selectively transfers steam from a cold reheat conduit to the second extraction conduit. The plant further includes a boiler, a high-pressure turbine, an intermediate pressure turbine, a low pressure turbine, a main steam conduit for feeding steam from the boiler to an inlet of the high pressure turbine, a cold reheat conduit for feeding steam from an outlet of the high-pressure turbine through a reheat flow path in the boiler, and a first and second high pressure heaters. A first extraction conduit connects the cold reheat conduit to a first high pressure heater to transfer heat, and a second extraction conduit connects the intermediate pressure turbine to the second high pressure heater, to transfer heat.

The invention discloses a power generation technique based on pyrolyzation and gasification of household refuse and incineration of fuel gas. The power generation technique comprises the steps that the household refuse is sorted, pulverized and dried; then pyrolyzation and gasification are conducted on the household refuse, so that combustible gas is generated; the combustible gas is incinerated; steam is prepared from hot air obtained through incineration through heat exchange; and the steam is introduced into a steam power generator for power generation. According to the power generation technique based on pyrolyzation and gasification of the household refuse and incineration of the fuel gas, the heat energy conversion rate of pyrolyzation and gasification is higher, the power generation efficiency is greatly improved, and the cost caused by procedure increment can be counteracted by the increased economic benefits; the refuse is subjected to pyrolyzation and gasification under an oxygen-free or oxygen-deficient condition firstly after being dried instead of being directly incinerated, and thus the amount of generated dioxin is greatly reduced; the dioxin can be evenly decomposed by conducting heat-storage incineration of the generated combustible gas through secondary gas at the temperature over 850 DEG C. Tail gas is used for dying the refuse, and smoke emission hardly exists under the adsorption action of the pulverized refuse.

The present invention is characterized by that a pipeline heat-efficiency on-line analysis and monitoring system is designed for steam power plant. Said system is mainly formed from data acquisition system, data base server, model operation server, and input/output equipment, and the steam power plant pipeline heat-efficiency counterbalance heat-efficiency calculation formula can e used in said system, so that its pipeline heat-efficiency and thermal less distribution can be calculated, and its analytical report or characteristic curve can be displayed on the information screen and customer's machine. Said system can implement on-line mointoring of working state of main pipeline system of steam power plant.

The invention discloses a diagrammatized steam power system analysis and optimization method and device. The method includes the following steps that process parameters of a first steam power system are collected under different working conditions; a first nonlinear mathematical model is established according to equipment composition and the process parameters of the first steam power system; simulation solution is conducted on the first nonlinear mathematical model, so that first simulation results of all devices and streams in the first steam power system are obtained; according to the first simulation results, steam generation and use data of all grades of steam boilers, steam turbines, turbines and temperature and pressure reducers in the first steam power system are obtained in a statistic mode, a load allocation diagram of the first steam power system is generated, and the load allocation diagram takes temperature as vertical coordinates and takes flow as horizontal coordinates; according to the load allocation diagram and the first simulation results, the running state and structural reasonability of the first steam power system are analyzed, composition of the first steam power system is improved according to the analysis result, and a second steam power system is obtained.

The present invention discloses a sludge anhydration system by utilizing waste heat of steam power plant smoke. Said sludge anhydration system includes heat supply system, sludge pretreatment system, feeding system, sludge, anhydration and granulation system and dust-removing and gas-removing system.

An exhaust steam pipeline for steam power plants includes a main steam line and at least two branch lines which are fluidly connected to respective condenser elements of the steam power plant and branch off from the main steam line at connection zones in spaced-apart relationship. The main steam line has a cross section, which decreases following each of the connection zones, and is constructed to ascend at an angle to a horizontal in flow direction of the exhaust steam.

A steam-water separator for the steam generator in nuclear power plant and the boiler in steam power plant is composed of a separating cylinder with central column and dual oblique blades installed to said central column, a sleeve barrel outside the separating cylinder with a hydrophibic flow limiting ring at its bottom end, a steam outlet barrel above said separating cylinder, and a diverter cover above said steam outlet barrel and with radiating blades. Its advantage is high critical flow seed of steam and separating efficiency.

The invention relates to a solar steam power device. The solar steam power device mainly consists of a solar heat collector, an electric heating apparatus, a heat storage tank and a steam generator, wherein solar heat collecting plates, or U-shaped metal heat collecting tubes serially connected inside a solar vacuum tube, form the solar heat collector, the solar heat collector is internally provided with a heat conducting liquid, the heat conducting liquid outlet of the solar heat collector is connected with the inlet of the heat storage tank, the outlet of the heat storage tank is connected with the solar steam generator, the heat conducting liquid outlet of the solar steam generator is connected with the inlet of the solar heat collector to form a loop, and the electric heating apparatus and a high-temperature circulating pump are connected between the heat storage tank and the solar heat collector. The invention provides brand-new high-efficiency and low-cost solar technical equipment for energy saving and emission reduction as well as clean energy application in China.

The invention relates to a steam power plant which consists essentially of a steam generator (1), a turbo group comprising a condensing steam turbine (2) and generator (3), a water-cooled condenser (4) and a bled-steam-heated preheating system. In said steam power plant all components, including the fuel storage area (6), are situated at ground level and in the open air. The turbo group (2, 3) and the condenser (4), the preheating system with associated pumps and the transformers (7) are arranged such that a gantry crane is able to pass over them. The steam generator (1), flue gas cleaning system (16) and the chimney (17) are positioned in a row along a common flue gas axis (18) and the turbo group (2, 3) arranged in the immediate vicinity and parallel thereto. As seen from the main wind direction (9), the coal storage area (6) is positioned downwind from the turbo group (2, 3) and the steam generator (1).