745 results about "Boiler (power generation)" patented technology

The invention discloses a microgrid running optimization system and method based on power and heat combined dispatching. Running restrains such as the output force characteristic, start, stop and climbing of a distributed type generator set and the charge and discharge characteristics of power and heat energy storage are comprehensively considered, a microgrid power and heat combined dispatching model containing a fan, a photovoltaic cell, a combined heat and power generation system, an electric boiler, a fuel cell and an energy storage (electrical energy storage and heat energy storage) is built, the 0-1 mixed integer nonlinear programming method is adopted for solving the optimal output force and total running cost of all units in the network, and power and heat dispatching contrastive analysis is carried out on the system and a traditional separated generation and combined generation optimization model. In addition, the influences of the heat and power reliability difference on the running are analyzed and discussed, and therefore the heat and power dispatching module is more reasonable, comprehensive and universal.

This invention provides means for producing power by using isothermal compressors and isothermal expanders. One embodiment has an isothermal compressor that compresses air (or other gas), passes the air through a counter-flow heat exchanger, which heats the air, uses the heated air to drive an isothermal expander for power generation, and transfers the expander exhaust back through the counter-flow heat exchanger to heat the input air to the expander. Another embodiment has a boiler that produces vapor that flows through a counter-flow heat exchanger to superheat the vapor. The vapor then flows through an isothermal expander for power generation. The exhaust from the isothermal expander flows back through the counter-flow heat exchanger to supply heat to the vapor coming from the boiler and then flows through another heat exchanger that preheats the feed liquid flowing to the boiler.

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.

The invention provides an optimization method of the operation of a power station boiler. The optimization method comprises the following steps: obtaining optimal operating condition data; obtaining current operating condition data of a thermal power generating unit; when safety index parameters, stability index parameters and environment-friendly index parameters all meet pre-set conditions, obtaining a power generation cost of a current operating condition; if finding an operating condition which is the same as the current operating condition from the optimal operating condition data, obtaining an optimal operating condition power generation cost of the current operating condition; if not finding, adding current operating condition parameters into historical operating condition data; if the power generation cost of the current operating condition is less than or equal to the optimal operating condition power generation cost, sending out a first alarming prompt; otherwise, obtaining an adjusting value and obtaining a cost loss; sending out a second alarming prompt and outputting the adjusting value; continuously adjusting an oxygen amount and an air feeding amount according to the adjusting value; and when meeting a pre-set condition, stopping adjusting. The invention further provides an optimization device of the operation of the power station boiler and the stability of optimizing the power station boiler is improved.

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 steelmaking residual heat step recycling method. The invention belongs to the technical field of steel industry iron-making residual heat and residual energy utilization. The method is adopted under a condition for further utilizing iron-making low-grade residual heat, and comprises step recycling and high-efficiency utilizations of blast furnace gas residual heat, dust removal air residual heat, water slag residual heat, hot air furnace low-temperature flue gas waste heat, and dust cover and slag ditch residual heat. According to the technical scheme, blast furnace gas residual heat and dust removal air residual heat obtained after furnace top residual pressure power generation are connected in parallel, and are supplied for domestic water, cooling, or heating. Recycled water slag residual heat and flue gas residual heat obtained after hot air furnace gas heat exchanger are connected in parallel, and are used for supplying a heat source for low-temperature seawater desalination. Recycled dust cover residual heat and slag ditch surface radiation heat are connected in parallel, and are supplied for blast furnace gas supplementary firing residual heat boiler power generation. After powder generation, high-temperature seawater desalination is realized by a steam method. Cooling water and domestic water are treated and are adopted as inlet water replenishment. Through step recycling and graded utilization of the low-grade residual heat and residual energy, steel system comprehensive energy consumption can be reduced to a maximal extent, and energy resource reasonable utilization and comprehensive optimized utilization can be realized.

The present invention discloses a method and a device for recycling the waste heat in the discharged smoke of marsh gas power generation. According to the method of the invention, the discharged smoke after power generation of a marsh gas internal combustion engine (3) enters a waste heat boiler (4) for heat exchanging with the water, and the smoke after temperature reduction is discharged; the steam generated after heat absorption of the water enter a screw bolt expansion power machine (6) and a generator (7) for expanding, work applying and power generating, the discharged steam enters a condenser (8), and the condensed water enter the waste heat boiler (4) for recycling. Compared with the prior art, the invention uses the waste heat of the discharged smoke after marsh gas power generation for generating the steam. Then the steam enters a low-grade heat energy power machine-screw bolt expansion power machine for expanding, work applying and power generating. The low-grade heat is directly converted to the electric energy. The generated electric power can be combined with the electric power generated by the marsh gas internal combustion engine and sent to the electric network. The method and the device of the invention have the advantages of easy implement, strong operability and no effect by the position of the marsh gas power generating plant. The heat can be directly converted to the electric power and transmitted to the outside. The limitation of waste gas utilization mode of traditional smoke discharging is overcome.

The invention relates to the technical fields of the solar thermal power generation and energy, in particular to a solar energy and methanol fuel chemical-looping combustion power generation system and method used for controlling CO2 emission. The intermediate-low temperature solar thermochemical process and the chemical-looping combustion power cycle are coupled organically to form the system ofthe invention. The system comprises a solar heat collecting-reduction reactor, a solar heat collecting-decomposition reactor, an oxidation reactor, an afterburning combustion chamber, a gas turbine, a steam turbine, an exhaust-heat boiler, a heat exchanger and the like. By using the device of the invention, the graded use of energy resources with different qualities can be realized; the zero-energy separation of CO2 can be realized through simple condensation; the combustion method can reduce the fuel grade to FeO grade, thus reducing the fuel loss in the combustion process and increasing theefficiency of the system; the solar thermochemical reaction is adopted to improve the grade of intermediate-low temperature solar energy; and afterburning is adopted so as to solve the problem that the gas turbine inlet has low initial temperature caused by the limit of the cycle material in the chemical-looping combustion power system.

The invention relates to a molten steel slag dry processing and waste heat recovery and power generation method. According to the method, a cooling mode using a large amount of water in wet processingis completely abandoned, sealed equipment is used, air is used as a medium so as to perform dry processing on high-temperature steel slag, the steel slag is cut and granulated by an air knife in thesealed equipment, solid-gas waste heat exchange is completed at the same time, the steel slag is cooled, waste heat is carried by hot smoke after heat exchange so as to enter a waste heat boiler afterbeing dedusted, and then gas-liquid heat exchange is completed so as to obtain saturated steam which can be used for supplying heat, drying and generating power. By adopting the method, the problemsof waste of heat resources, high consumption of water resources and dust blowing in the wet processing can be solved, the method is suitable for reforming steel slag processing lines of existing coldabandon methods, hot splashing methods, water granulation methods, air granulation methods, hot stuffy methods and the like, short for a two-step air brittle method, and the method is a novel technique of completely utilizing three resources including steel slag, waste heat and tailings in a comprehensive utilization technique of smelting steel slag resources at present.

The invention provides a natural gas smoke waste heat complete heat recovery device, belongs to the technical field of energy, and particularly relates to a technology for completely recovering smokewaste heat emitted by fuel gas burning devices (boilers, direct-fired machines, gas engines, gas turbines and the like). Aiming at the status-quo that the heat energy utilization rate of a current natural gas boiler is low, a three-grade cooling two-grade heat exchanging technological process is adopted, cascaded cooling is conducted on smoke through a heat exchanger and a heat pump, particularlylatent heat for vaporization in the smoke is recovered and reused, the smoke emission temperature of a natural gas boiler is decreased to be the temperature the same as the natural gas entering the boiler, and complete utilization of the heat energy of the natural gas is truly achieved. In the processes of smoke cooling and heat energy recovering, a great deal of condensed water is recovered, partof sulfide and nitric oxide in the smoke is dissolved in the water, and thus emission of pollutants is reduced. When the natural gas smoke and waste heat complete heat recovery device is applied to combined heat and power generation power plants, less electric energy can be consumed in the heating period, the heating area can be increased by 30% or above, and the consumption amount of heating fuel gas can be reduced by 10-15%.

The invention relates to a high-pressure reheating gas-steam combined cycle power generation system and a power generation method. The system consists of a gas turbine subsystem and a steam turbine subsystem, wherein the gas turbine subsystem comprises a device used for two-stage air compression, twice combustion as well as high-pressure and medium-pressure twice turbine acting; after primary acting of high-temperature gas, the high-temperature gas enters a medium-pressure combustion chamber and is reheated for secondary acting, so that the average heat absorption temperature of the whole cycle is improved; and at least a one-stage intercooler is arranged between two-stage compressors, and heat flow of the intercooler is connected with the two-stage compressors. The steam turbine subsystem adopts a three-pressure reheating type boiler and a steam turbine, cooling water of the intercooler is connected with high-pressure water, and high-pressure, medium-pressure and low-pressure water as well as the cooling water of the intercooler absorb heat in a staged manner for multiple times, so that heat energy is efficiently utilized. When the high-pressure reheating gas-steam combined cycle power generation system provided by the invention operates with the best parameters, the combined cycle efficiency is increased by 3-5 percentage points compared with a combined cycle system which mainly adopts a gas turbine class F, and the single-machine output power is increased by more than 70%, and reaches 800MW class.

The invention discloses an optimal scheduling method considering wind power-heat storage unit-electric boiler combined operation. The method comprises the steps of 1, establishing a wind power unit model, a thermal power unit model, a combined heat and power generation unit model, a heat storage unit model and an electric boiler model; 2, taking minimum system comprehensive cost as a target, constructing a wind power-heat storage unit-electric boiler combined operation optimization model, and configuring capacities of the heat storage unit and an electric boiler; 3, considering system constraints, unit constraints, heat storage and electric boiler constraints, predicting error cost constraints and environmental penalty cost constraints, and carrying out output configuration of each deviceof the system by taking lowest total cost of system operation as the target; and 4, when wind curtailment exists, enhancing the output of the heat storage and the electric boiler; and during valley wind, reducing heat storage and the output of the electric boiler, and increasing a wind power consumption capacity. In the method, the environmental penalty cost is added into the model, and a description method of thermal power and thermoelectric unit operation cost is improved so that a scheduling model is closer to an actual situation.

The invention provides a waste heat recovery product well system for ISC and an operation method of the waste heat recovery product well system for the ISC. The waste heat recovery product well system for the ISC comprises a product pipe, a jacketed pipe, a water cooling pipe, a monitoring instrument system, a product well bushing, a high-temperature high-pressure wellhead device, a ground waste heat recovery device and the like. Each component in the product well system is easy to recycle and reutilize. Heat carried out by high-temperature high-pressure downhole steam can be used for the ground production technology, turbine power generation, boiler power generation, other ground public facilities or plant life purposes and the like. By the adoption of the waste heat recovery product well system for the ISC and the operation method of the waste heat recovery product well system for the ISC, effective monitoring, control and protection of a product well can be achieved, waste heat of high-temperature crude synthesis gas is reliably and effectively recycled and comprehensively utilized, the consumption of cooling water is significantly reduced, and the requirement for downstream waste water treatment is lowered, comprehensive and efficient utilization of coal is achieved, the energy consumption of the whole ISC is lowered, and the technical problems faced by the existing ISC are finally solved.

The invention discloses a power generation system based on the coupling of renewable energy hydrogen production and biomass gasification and a working method. The power generation system comprises a renewable energy power generation device, a power distribution device, a water electrolysis hydrogen production device, a hydrogen storage tank, an oxygen storage tank, a biomass gasification device, ahydrogen and gas mixing device and a gas-fired boiler power generation device. The renewable energy power generation device, the power distribution device and the water electrolysis hydrogen production device are connected in sequence. The water electrolysis hydrogen production device is connected with the hydrogen storage tank and the oxygen storage tank. The oxygen storage tank is connected with the biomass gasification device. The hydrogen storage tank and the biomass gasification device are both connected with the hydrogen and gas mixing device. The hydrogen and gas mixing device is connected with the gas-fired boiler power generation device. The power distribution device and the gas-fired boiler power generation device are connected with a power grid. Through water electrolysis hydrogen production by means of electricity abandoning, large-scale storage and consumption of renewable energy sources can be achieved, the water electrolysis hydrogen production cost is reduced, generated hydrogen and biomass gasified fuel gas are mixed for power generation, and the biomass power generation industry layout is accelerated.

An integrated power generation system for reducing carbon dioxide emissions is provided. The integrated system comprises a gas turbine having an air inlet, a fuel inlet and an exhaust gas outlet; a steam-assisted gravity drainage (SAGD) boiler having an inlet connected to the exhaust gas outlet of the gas turbine, a fuel inlet, an optional air inlet, and a flue gas outlet; and a carbon dioxide capture system connected to the flue gas outlet of the SAGD boiler. A method for capturing the carbon dioxide exhausted from a gas turbine and a SAGD boiler is also provided.

The invention discloses a spiral vibrating bed waste heat recovery device in a melted blast furnace slag granulation process. The device consists of a spiral vibrating bed rapid cooling unit in a granulation stage and a waste heat recovery unit. The spiral structure of the spiral vibrating bed rapid cooling unit in the granulation stage can prolong landing distances of melted blast furnace slag particles after the melted blast furnace slag particles are subjected to dry-method granulation process, bottom circulating cooling air and the melted slag particles are subjected to heat exchange through pores on a screening bed surface in a countercurrent way, so that the cooling speed is improved, a target of quenching the blast furnace slag is realized, the bonding between the melted slag particles and between the slag particles and a vibrating bed surface is effectively prevented, and the blast furnace slag particles with glass structures are obtained as many as possible; and the waste heat recovery unit comprises a matched dedusting and air supply system, a secondary cooling device and a waste heat utilization device. High-temperature air recovered by the spiral vibrating bed rapid cooling unit in the granulation stage is provided for a hot air furnace through a dust remover and an air supply pipeline part, the rest of high-temperature air is fed into the secondary cooling device for continuous heat exchange and heating up, and the high-temperature air at a temperature of 700 DEG C enters a waste heat boiler for generating steam for power generation.

The invention discloses a data center multiple energy guarantee triple generation system and a control method thereof, and belongs to the field of energy optimization. The data center multiple energyguarantee triple generation system includes a gas turbine power generation system, a steam turbine power generation system and a city power grid which are connected to the data center through a secondAC bus; an electric vehicle battery changing station and the city grid are connected to a first AC bus; the first AC bus and the second AC bus are connected by a grid-connected switch; lithium bromide refrigerating machines and electric refrigerating machines produce cold energy; and a high-temperature flue gas splitter realizes the split control of flue gas. The data center multiple energy guarantee triple generation system supplements the waste heat boiler-steam turbine power generation system, splits the high-temperature flue gas produced by the gas turbine, and adjusts the ratio of the cold energy and electric power output by the triple generation system, so as to adapt to the demand ratio of cold energy and electric energy of the data center, and realize the cascade utilization of the energy at the same time. The invention considers that the data center is constructed relying on the electric vehicle battery changing station, and uses the power batteries of the battery changing station as a reliable energy storage device for the data machine room, which provides further guarantee for the stable power supply of the data center.

The invention relates to a process for producing combustible gas from sludge. The invention belongs to the field of harmless resource utilization of sludge. Combustible gas is produced from sludge with a water content of 70%-80% and a large amount of harmful bacteria and heavy metals. The specific process is: add a moisture regulator and a fluffing agent to the dewatered sludge discharged from a sewage treatment plant and mix evenly to adjust the moisture content. To 40%-70%, aerobic fermentation is carried out under the conditions of regular overturning and forced ventilation. Kill harmful bacteria through fermentation, remove foul smell and reduce the moisture content to 20%-40%, after air-drying or directly briquetting to make fuel blocks, stack them into strips and store them for further air-drying. Put the air-dried fuel block into the gasification furnace, and carry out high-temperature or medium-temperature pyrolysis and gasification under the condition of restricted ventilation to generate mixed combustible gas for use in boilers and power generation, and its ash is used as building materials.

The invention relates to a once-through boiler, steam turbine and power grid coordinated control method for primary frequency modulation analysis. The invention aims to solve a problem that characteristics of the boiler are not considered in the prior art so that great resistance is brought to participation of a high-capacity high-parameter thermal power generation unit in primary frequency modulation and safe and stable running of an electric power system is not facilitated. The method comprises the steps of firstly, performing once-through boiler energy state analysis so as to determine the once-through boiler energy state; secondly, performing power grid energy state analysis so as to determine the power grid energy state; and thirdly, determining a grid source energy coordinated control strategy according to the once-through boiler energy state determined in the step one and the power grid energy state determined in the step two. The once-through boiler, steam turbine and power grid coordinated control method enables the thermal power generation unit to not only sufficiently participate in frequency modulation, but also be operate safely and efficiently under the premise of meeting a requirement of safe running of a power grid. The once-through boiler, steam turbine and power grid coordinated control method is applied to the field of primary frequency modulation analysis.

The invention discloses a biomass gasification-circulating fluidized bed boiler combined power generation system and a working method thereof, belonging to a biomass efficient utilization and power generation technique. At present, the biomass direct combustion power generation technique has the problems of high cost and small scale; the biomass blend combustion technique has the problems of low blend combustion ratio, technical difficulties and high cost; and the gasification power generation technique has the problems of higher technical requirements for power generating equipment (gas turbines, internal combustion engines and the like), low energy utilization efficiency and higher cost. In order to solve the technical problems above, the coproduction of the biomass gasification technique and the circulating fluidized bed boiler power generation technique is utilized to avoid the biomass direct combustion power generation and blend combustion; a thermal circulation loop is arranged between a biomass gasification system and a fluidized bed boiler power generation system to perform high-temperature combustible gas waste heat recovery; and an air preheating system is arranged at the waste heat recovery low-temperature section of the biomass gasification system, thereby enhancing the charged medium temperature of a gasification furnace, and increasing the energy utilization efficiency of the system. The biomass gasification-circulating fluidized bed boiler combined power generation system provides a convenient, low-cost, safe and efficient way for development and utilization of biomass resources.

The invention relates to a power generation device, in particular to a power generation device through low temperature exhaust heat, and provides the power generation device through low temperature exhaust heat which is high in power generation efficiency, low in power generation cost and small in power generation limitation. The power generation device through low temperature exhaust heat comprises a bottom plate, a mounting rack, a water pool, a water inlet pipe, a one-way valve I, a cylinder body, a piston, a moving rod, a spring I, a pressing plate, a bearing seat I, a rotating shaft I, a cam, a bevel gear I, a bearing seat II, a bracket, a rotating shaft II, a bevel gear II, a fan I, a fixing plate, a heating furnace I, an air inlet pipe, a boiler I, a heating furnace II, a boiler II, a pressure relief pipe, a check block, a one-way valve III, an air nozzle I, a water outlet pipe, a one-way valve IV, an air outlet pipe II, a one-way valve V, an air nozzle II, a condensing tank, a fan II, a generating unit and a water outlet. According to the power generation device, the effects that the power generation efficiency is high, the power generation cost is low and the power generation limitation is small are achieved.