644 results about "Steam drum" patented technology

The invention discloses a boiler state monitoring and predicting system based on artificial intelligence, and relates to the technical field of state monitoring. The system comprises a data acquisition part, a combustion stability analysis part, a hydrodynamic instability risk assessment part, a steam drum water level fluctuation prediction part and a fault probability and service life assessment part. The data acquisition part is used for acquiring boiler operation data and water circulation data; the combustion stability evaluation part is used for calculating a thermodynamic efficiency index; the combustion stability analysis part is used for calculating a combustion stability coefficient; the hydrodynamic instability risk assessment part is used for calculating a hydrodynamic instability risk index; the steam drum water level fluctuation prediction part is used for calculating and predicting steam drum water level fluctuation; and the fault probability and service life evaluation part is used for evaluating the fault probability and the residual service life of the boiler. According to the invention, the comprehensiveness, accuracy and predictability of boiler operation state monitoring are obviously improved.

The invention discloses a double-medium thermochemical energy storage system and method. The double-medium thermochemical energy storage system comprises a first regulating valve, a gas storage tank, a thermochemical reactor, a fan, a steam pocket, a water feeding pump and a circulating water pump, the first regulating valve is communicated with an inlet of the gas storage tank through the fan and the electric heater, an outlet of the gas storage tank is communicated with an inlet of a heat exchange tube in the thermochemical reactor, an outlet of the heat exchange tube in the thermochemical reactor is divided into two paths, one path is communicated with an inlet of the fan, and the other path is communicated with a shell side inlet of the steam pocket; a bottom outlet on the shell side of the steam drum is communicated with an inlet of the circulating water pump after being combined with an outlet of the water feeding pump through a pipeline, an outlet of the circulating water pump is communicated with an inlet of a heat exchange pipe in the thermal chemical reactor, a shell side outlet of the thermal chemical reactor is communicated with the pipe side of the steam drum, and a pipe side inlet of the thermal chemical reactor is communicated with a drainage pipe. According to the system and the method, the heat exchange efficiency of the thermochemical reactor can be improved.

The invention discloses a coal-fired unit main steam temperature control method based on feed water flow asynchronous regulation, which comprises the following steps of: firstly, calculating the variation of total heat carried by a boiler drum inlet working medium corresponding to unit feed water flow change, and further calculating the variation of saturated steam flow generated by a drum according to energy balance; therefore, the main steam temperature change value corresponding to the change of the unit feed water flow is obtained, then the feed-forward quantity of the main steam temperature deviation on the regulation of the feed water flow of the boiler system is obtained in combination with the real-time deviation of the main steam temperature, and asynchronous regulation of the feed water flow is realized. According to the method, the control effect of the main steam temperature can be greatly improved, and the method is of great significance to improvement of the rapid load changing capacity of the coal-fired unit.

The invention relates to the technical field of industrial waste heat recycling, in particular to an electric heating device and method for superheating saturated steam generated in the evaporative cooling process of a converter, an electric furnace and a steel rolling heating furnace in the iron and steel industry. Clean energy electricity serves as a heat source, saturated steam is heated into superheated steam through the steam superheater, the quality of the saturated steam can be effectively improved, damage of steam condensation water is prevented, and meanwhile steam conveying loss can be reduced; and compared with a traditional fuel gas type overheating device, other emissions are not added, and the problem of environmental pollution cannot be generated. The method is particularly suitable for the superheating process of high-temperature flue gas of a converter and an electric furnace in steel production and saturated steam generated by evaporative cooling steam drums such as a supporting beam in a heating furnace, the quality of (saturated) steam can be greatly improved by adopting the method, meanwhile, the harm caused by condensation of steam into water due to temperature reduction can be prevented, energy waste is effectively reduced, and the production cost is reduced. And the method has high economic benefits.

The invention relates to the technical field of power generation system transformation, in particular to an energy storage power generation system and method based on thermal power plant transformation. The Carnot battery unit comprises a liquid carbon dioxide storage tank, an electric heater, a compressor, a heat storage transducer heat flow channel and an expansion machine which are connected in sequence, and the liquid carbon dioxide storage tank adopts a boiler drum of a thermal power plant and stores liquid carbon dioxide liquefied by a water chilling unit of the thermal power plant; the heat storage circulating unit exchanges heat with a heat flow channel of the heat storage transducer to store heat; the steam power generation unit adopts a thermal power plant steam generator set and extracts heat stored by the heat storage circulation unit for steam power generation. The thermal power generating unit is transformed into the carbon dioxide Carnot battery energy storage system, the defect that a power grid is unstable in the process that a traditional thermal power plant is gradually converted into new energy is overcome, double stable output electric quantity is achieved, the system efficiency is improved, and meanwhile high economic benefits are achieved.

A steam single-screw compressor testing system is characterized in that the steam single-screw compressor testing system is composed of a steam pocket (5) and a liquid-gas separator (3), an electric heater (12) and an inverted-T-shaped steam distribution mixer (13) are installed in the steam pocket (5), and the steam pocket (5) is communicated with a steam single-screw compressor (1) through a steam return pipeline (6); the steam single-screw compressor (1) is communicated with a gas inlet of the liquid-gas separator (3) through a high-pressure steam outlet pipeline (2), high-pressure steam separated by the liquid-gas separator (3) is communicated with a gas inlet of the inverted-T-shaped steam distribution mixer (13) installed in the steam pocket through a low-pressure steam pipeline (4), and the bottom of the inverted-T-shaped steam distribution mixer (13) is located below the waterline of the steam pocket (5). And small holes are fully distributed, so that high-temperature steam and water in the steam pocket are uniformly mixed for heat transfer, and heat energy is recycled. The air conditioner is simple in structure, the compressor is started without electric heating, and energy and water resources are saved.

The invention discloses a fuzzy model predictive control method for a coal-fired boiler-steam turbine system, and mainly relates to the technical field of intelligent environmental protection. Comprising the following steps: S1, constructing a fuzzy prediction model by using Takagi-Sugeno fuzzy logic; s2, constructing a control efficiency evaluation index, and establishing a dual-channel event triggering mechanism; s3, constructing a model prediction controller, constructing an objective function based on the prediction model, and solving an optimal control signal at each sampling moment; s4, performing offline training on the fuzzy prediction model through actual data of the boiler-steam turbine system to obtain a prediction model for a control system; s5, on the basis of a dual-channel event triggering mechanism, updating the prediction model according to real-time data through an online updating strategy; according to the method, the steam drum pressure, the generated power and the steam drum water level can be efficiently and accurately controlled, the calculation overhead can be effectively reduced, and the real-time performance and the stability of a control system are improved.

The invention discloses a fan frequency control method and device, electronic equipment and a computer medium, and belongs to the technical field of automatic incineration. According to the specific scheme, the method comprises the steps of obtaining a parameter sequence value of a control parameter of the automatic combustion control system in a historical period, a current flow value of main steam flow, a flow set value of the main steam flow, a real-time value of steam pocket pressure, a hearth material layer pressure difference value and a control variable sequence value in the historical period; calculating a flow predicted value of the main steam flow; calculating flow deviation; calculating the frequency of an intermediate fan; the steam drum fan frequency is calculated; the flow fan frequency is obtained; calculating a primary frequency given value; and the primary frequency set value is dynamically corrected, and the target primary fan frequency of the primary fan is obtained and adopted to control the primary fan. The response speed of the automatic combustion control system can be effectively improved, so that the control of the frequency of the extension set can be closer to the actual production condition.

The invention discloses a fuming furnace waste heat boiler liquid level automatic control device, method and system and a medium, and the method comprises the steps that sensing data are obtained and preprocessed, and the sensing data at least comprise steam drum liquid level data, steam output flow data and boiler feed water flow data; performing three-impulse cascade PID control based on the sensing data to obtain a control instruction, wherein the control instruction comprises a theoretical water replenishing value, a valve opening instruction and a water pump frequency converter adjusting instruction; regulating valve control and constant pressure difference control are carried out based on the control instruction in combination with a preset interval; and performing synchronous control based on a preset safety interlocking protection mechanism, wherein the synchronous control comprises pump spare power automatic switching, regulating valve abnormity alarm, over-limit water level interlocking and man-machine interaction. Through innovative three-impulse cascade PI D, dynamic interval control and constant pressure difference optimization, the defects of a traditional method under the complex working condition of the fuming furnace are overcome, high-precision and high-stability liquid level control is achieved, and meanwhile equipment safety and economical efficiency are remarkably improved.

The invention discloses a fused salt steam generation system and a control method thereof. A high-temperature molten salt tank, a salt feeding pump, a molten salt channel of a second-stage superheater, a molten salt channel of a first-stage superheater, a molten salt channel of an evaporator, a molten salt channel of a preheater and a low-temperature molten salt tank of the system are communicated in sequence; the water supply end, the water supply pump, a steam-water channel of the preheater, the steam pocket, the pressure regulating valve, a steam-water channel of the first-stage superheater, the water spraying and temperature reducing device, a steam-water channel of the second-stage superheater and the steam removal end are sequentially communicated, and a descending pipe and an ascending pipe of the steam pocket are communicated with a steam-water channel of the evaporator. The control method aims at the system. The method has the advantages that the steam pocket pressure is actively adjusted during load rising, the liquid working medium is flashed, a load instruction can be quickly responded, steam is stably generated according to the instruction and merged into the steam turbine, and the stability and safety of the steam turbine are improved; the steam pocket of the evaporation system is used as steam storage equipment, so that an independent steam storage pocket is prevented from being arranged in the evaporation system, the cost is reduced, and the control logic is simplified.

The invention relates to the technical field of drum water level prediction, and discloses a boiler drum water level prediction method based on a DBN model, which comprises two parts of pre-training and reverse fine tuning. In the pre-training process, an unsupervised greedy layer-by-layer method is utilized to initialize connection weights and offsets among layers of the network. And each layer of the RBM is trained from bottom to top. When each layer of the RBM is trained, learned model parameters serve as initial values of supervised learning, and priori knowledge of input data is provided. The DBN is a multi-hidden-layer deep learning model composed of a plurality of RBMs, the DBN is trained layer by layer through an RBM network to obtain better initial parameters, and then the parameters are finely adjusted on the original basis by using a BP algorithm to enable the loss of reconstruction output and original input to be minimum. Compared with the prior art, the method has the advantages that a large amount of operation data is fully utilized, the drum water level prediction model is established, the false water level is predicted in advance, and the adverse effect of the false water level on a control system is effectively prevented.

Provided in the present invention are a drum boiler model parameter determination method and apparatus for primary frequency regulation of a thermal power unit. The method comprises: acquiring structural parameters and thermal parameters of a drum boiler in a current operating state; on the basis of a pre-constructed drum boiler model, obtaining a drum boiler steady-state model; and on the basis of the structural parameters, the thermal parameters and the drum boiler steady-state model, determining model parameters of the drum boiler model, wherein the model parameters comprise operating-state-independent parameters and operating-state-dependent parameters, and the operating-state-dependent parameters comprise a heat transfer rate from flue gas to an evaporation zone, a heat transfer rate from flue gas to a metal pipe wall in a superheat zone heat exchange unit, a pipe resistance coefficient of a superheat zone heat exchanger, parameters of the superheat zone heat exchange unit, and a valve flow coefficient. The present invention can realize online calculation of drum boiler model parameters in different operating states, and can reflect changes in the model parameters along with the operating states of the unit, thereby improving the accuracy of an online monitoring result of the primary frequency regulation capability of the thermal power unit.

The utility model provides a kind of high-temperature solid material waste heat boiler, including fender, first heat exchange pipe, second heat exchange pipe and steam drum;The fender is enclosed into the cylinder structure for high-temperature solid material from top to bottom to flow, first heat exchange pipe is located in the upper section of cylinder structure inside, second heat exchange pipe is located in the lower section of cylinder structure inside, first heat exchange pipe and second heat exchange pipe are all by spiral coil pipe structure from top to bottom, independently the flow cross section of high-temperature solid material is divided into several areas, the water inlet and water outlet of first heat exchange pipe are connected with the steam drum outside cylinder structure respectively, and the water outlet of second heat exchange pipe is connected with the steam drum.The utility model waste heat boiler uses the mode that heat exchange pipe and high-temperature solid physical direct contact, can effectively recover high-temperature sensible heat, produce steam.Heat exchange pipe spiral arrangement, multiple area segmentation material flow cross section, expansion free, both energy saving, and can extend equipment service life.

The invention relates to an intelligent combustion monitoring and rapid intervention control method and system for deep peak regulation of a coal-fired boiler. The method comprises the following steps: reconstructing a two-dimensional temperature field of a hearth through regularization optimization modeling by utilizing hearth infrared measuring point data; constructing a coal quality dynamic identification model to realize dynamic monitoring and trend prediction of coal quality fluctuation; a combustion state nonlinear probability fusion model is constructed, on the basis of a probability graph model, information such as flame detection signals, hearth negative pressure, flame images, oxygen amount, steam drum water level, coke falling and coal interruption is fused, joint probability distribution is constructed, time sequence incremental learning is conducted in combination with an XGBoost model, and dynamic recognition and early warning of the combustion state are achieved. Key parameters such as a flame image, temperature field distribution and negative pressure fluctuation are collected in real time by means of a hearth multi-dimensional combustion state recognition model, a decision module is triggered when a combustion state score reaches an early warning threshold value, a quick oil gun is triggered to be put into use, and early warning in advance is changed into quick intervention.

The invention discloses a remote operation and maintenance control method for a waste heat power generation variable working condition mode, and the method is based on a flue gas and air system, a flue gas and air turbine coordination model and a turbine system, and the flue gas and air turbine coordination model converts steam parameters outputted by the flue gas and air system into steam parameters inputted by the turbine system; the flue gas system comprises a first evaporation model, a second evaporation model and a steam pocket unit; the method comprises the steps of collecting historical data of a waste heat power station and constructing a flue gas and air system according to the following formula; the flue gas and wind turbine coordination model converts steam parameters output by a flue gas and wind system according to the following formula to obtain turbine steam parameters; constructing a steam turbine system according to the steam turbine steam parameters; extracting flue gas and air system data through a convolutional neural network to construct a flue gas change feature vector and a steam-water change feature vector; establishing a flue gas and wind turbine coordination prediction model according to the flue gas and wind change feature vector and the steam and water change feature vector; performing optimization training on the flue gas turbine coordination prediction model through a long short-term memory neural network; stable power generation of the waste heat furnace is guaranteed.

The utility model relates to a blow-off flash steam recovery system for a heat recovery coke oven waste heat boiler, which is characterized in that heat recovery boilers are provided with heat recovery boiler drums, the bottoms of the heat recovery boilers are provided with heat recovery boiler blow-off pipes, and sewage outlets of the heat recovery boiler drums are connected with sewage inlets II of corresponding blow-off flash tanks through pipelines II; a blow-off pipe of the heat recovery boiler is connected with a first sewage inlet of the corresponding blow-off flash tank through a first pipeline, the top end of each blow-off flash tank is connected with an inlet of the steam compressor unit through a third pipeline, and an outlet of the steam compressor unit is connected with the low-pressure steam pipe network through a fourth pipeline. The heat recovery system has the advantages that pollution discharge flash steam of all the heat recovery boilers is recovered through the header pipe, the number of devices is reduced, and investment optimization and operation maintenance of the devices are facilitated; the steam compressor unit sucks flash steam, the flash steam is compressed and boosted to low-pressure steam, the low-pressure steam is connected to a low-pressure steam pipe network through an outlet pipeline of the steam compressor, and white steam caused by blow-off steam diffusion is avoided.

The invention provides an FCB bypass control method for a 9HA gas turbine. The FCB bypass control method comprises the following steps that S1, an analog quantity switching function block is adopted to memorize the gas turbine load Pg at the FCB triggering moment; s2, converting a gas turbine load Pg into a steam turbine load Pt according to F1 (x), and dividing the steam turbine load Pt by a gain K to form a percentage in a per unit range of 0-100%; s3, according to a valve flow opening degree curve provided by a bypass pressure reducing valve manufacturer, obtaining an initial preset bypass opening degree through F1 (x) by using the per-unit main steam flow; s4, acquiring a bypass opening curve according to 50% and 100% load steam turbine sliding stop and gas turbine load shedding tests, and correcting the initial preset bypass opening curve; by means of the method, accurate bypass control under different load FCB working conditions can be achieved, meanwhile, rapid pressure relief of a bypass system is met, it is guaranteed that main steam pressure is transited stably, the boiler is kept not overpressure, and it is guaranteed that the waste heat boiler drum water level change does not exceed a protection constant value to trigger MFT.

The invention relates to a low-temperature steam generation system capable of intelligently regulating and controlling the gas production rate and a regulating and controlling method, and aims to solve the technical problem that the steam production rate is unstable when a coal-fired power plant fluctuates. The intelligent control system inputs parameters related to boiler combustion, an intelligent neural network prediction model is obtained through analysis and training, the output unit outputs the group number of heat exchanger modules according to boiler loads and liquid level values of a first liquid level meter and a second liquid level meter, and the group number of the input heat exchanger modules, the liquid level of a steam drum or the liquid level of a heat exchanger are regulated and controlled. According to the method, the boiler load can be matched with the group number of the heat exchanger modules put into operation, and the problem of steam parameter lag caused by boiler load change of a traditional system is effectively solved, so that stable and reliable operation of the multi-effect evaporation system is realized, and collaborative coupling of desulfurization wastewater low-energy-consumption treatment and unit load is realized.

A solid electric thermal storage superheated steam output system is provided. Through a high-temperature air duct, a superheated steam heat exchanger, a saturated steam heat exchanger and a water preheating heat exchanger, heat exchange is performed under the drive of a variable-frequency fan to finally generate superheated steam for use of a heat consumer. The water preheating heat exchanger is connected to a preheating steam tank, heat generated after the superheated steam heat exchanger and the saturated steam heat exchanger exchange heat is used to generate low-temperature steam for thermal deoxygenation of a deaerator, while water flows into a deaerator water tank through an overflow pipe. A superheated steam unit is a structural combination including a steam drum as a core, sets of superheated steam heat exchangers, saturated steam heat exchangers, water preheating heat exchangers and corresponding accessories. An overall combined superheated steam system includes multiple superheated steam units.

The invention discloses a large-temperature-difference high-temperature fused salt and water heat exchange steam production system and a control method. The system comprises a fused salt storage tank, a high-pressure hot water storage tank, a fused salt-water / steam heat exchanger and a steam pocket, the fused salt-water / steam heat exchanger is of a multi-shell-pass spiral coil pipe type heat exchanger structure. A plurality of limiting inner barrels are arranged in a shell barrel to form annular cavities of different levels, a plurality of heat transfer pipes are connected in parallel and wound around a central pipe or the wall of an upper-level fiber inner barrel to form spiral coil pipes, and a plurality of sets of spiral coil pipes are arranged in the annular cavities respectively. A shell side fused salt liquid inlet, a shell side fused salt liquid outlet, a pipe side water inlet and a pipe side steam outlet are formed in the shell cylinder body; the fused salt-water / steam heat exchanger is connected with an outlet and an inlet of the fused salt storage tank and further connected with a water outlet and an inlet of the high-pressure hot water storage tank. High-temperature thermal shock damage of the heat exchanger and pipeline blockage caused by fused salt solidification can be effectively eliminated, membrane boiling of water is inhibited, the heat transfer efficiency is high, and system operation is safe and reliable.

The invention relates to the technical field of petrochemical cracking furnaces, in particular to a cracking method of an electrified cracking furnace and an electrified cracking device. The raw material flow is heated and then mixed with the diluted steam flow, the mixture is fed into a convection section of a cracking furnace to be overheated and then fed into a radiation section of the cracking furnace to be subjected to a cracking reaction to obtain cracked gas, the cracked gas is cooled by a quench cooler to obtain a product, and a rotating unit in the cracking method is driven by a motor; the steam pocket generates medium-pressure steam flow, and the medium-pressure steam flow is fed into the quench cooler to be subjected to heat exchange with cracking gas and then is fed into a medium-pressure steam pipe network. According to the technical scheme, a rotating unit of the cracking furnace is changed to be driven by the motor to rotate, so that the control is simpler. And the energy utilization efficiency is improved by changing the technological process and the connection mode of the cracking furnace.

The invention belongs to the technical field of waste heat recovery, and relates to a smelting flue gas waste heat power generation system based on modular heat storage and a control method thereof.The system comprises a smelting kiln and a flue gas system thereof, and the smelting kiln and the flue gas system comprise the smelting kiln, a cooling flue, a flue, a high-temperature dust remover, a high-temperature induced draft fan, a chimney, a quench cooler and a waste heat boiler; the modular heat storage system comprises modular heat storage units, and each modular heat storage unit comprises a first-stage modular heat storage unit group and a second-stage modular heat storage unit group which are connected in series; the steam power generation system comprises a steam-water pipeline, a steam pocket, a steam heat accumulator, a steam turbine, a condenser, a deaerator and a circulating pump. The modular heat storage unit is used for recycling and storing part of flue gas waste heat in a stepped mode, most of the remaining flue gas still enters a conventional waste heat boiler to release heat, smoothness of steam generation fluctuation of the steam heat accumulator and overheating of all saturated steam are achieved, and the technical bottleneck of stable overheating steam power generation of smelting flue gas waste heat is broken through.

The present invention provides a molten salt steam generator and an extended molten salt steam generator that transfer heat through heat pipes. The molten salt steam generator has a simple and compact structure, with uniform internal molten salt flow rate and molten salt temperature distribution, high overall heat transfer efficiency, easy to process and manufacture, and the molten salt is not easily frozen and blocked. In particular, it can adapt to heat exchange between two media with a large temperature difference, namely high-temperature molten salt and normal-temperature water, greatly reducing the operation energy consumption of the system itself and improving the overall economy of the system. Further, a molten salt steam generator with a larger tonnage can be extended from multiple molten salt steam generator monomers, sharing a steam drum and enabling standardized production of each steam generator monomer. The steam tonnage can be easily expanded. During steam use, the steam output can be flexibly adjusted by adjusting the number of molten salt steam generator bodies participating in the work, achieving dynamic balance of the steam output.

A reactive system for the synthesis of methanol from a make-up gas comprising hydrogen and carbon dioxide, comprising a catalytic converter and a steam system, wherein the converter includes at least one internal heat exchanger connected to the steam system and arranged to produce steam with heat of the methanol synthesis reaction, wherein the steam system includes a steam drum separated from the converter, the steam drum being connected to said heat exchanger via a feed line to feed water to the heat exchanger and a steam line to collect steam formed in the heat exchanger, wherein the steam system includes an electrical heater mounted internally in the steam drum and arranged to heat the feed water sent to the converter.

The invention discloses a boiler drum with a preheating device, and relates to the technical field of boiler equipment.The boiler drum mainly comprises an air supply device body, an air supply pipe, an incinerator, an air outlet pipe and the like, a main air supply pipe is arranged at the bottom of the air supply pipe, an air supply side pipe is arranged at the tail end of the right side of the air supply pipe, and the right side of the main air supply pipe is connected with a connecting pipe and a mixing pipe; by means of a multi-channel air supply structure, the fuel combustion efficiency is improved, fuel combustion is more sufficient, a smoke inlet pipe, a heat conduction pipe, a smoke removal box and the like are arranged above an air outlet pipe, heat conduction fins are arranged on the outer side of the heat conduction pipe, and inner fins are arranged in the heat conduction pipe. And the fuel conveying branch pipe and the connecting pipe can be independently detached and overhauled, equipment maintenance is facilitated, the use process is clear, and high practicability and innovativeness are achieved.

The utility model discloses a high-temperature heat storage peak regulation operation system for low-heating-value gas power generation, and belongs to the technical field of power plant equipment. The high-temperature heat storage peak regulation operation system for low-heating-value gas power generation comprises a heating furnace heat storage unit which comprises a fused salt heating furnace and a low-temperature storage tank, the fused salt heating furnace is used for heating low-temperature fused salt in the fused salt heating furnace through heat generated after low-heating-value gas is burnt, and the low-temperature storage tank is used for storing the low-temperature fused salt; the high-temperature evaporation unit comprises a high-temperature storage tank, an evaporator and a steam pocket, and the high-temperature storage tank is used for storing high-temperature fused salt; the working medium inlet end of the evaporator communicates with the high-temperature storage tank, the working medium outlet end of the evaporator communicates with the low-temperature storage tank, the fused salt heating furnace is connected with the low-temperature storage tank, and the steam pocket is used for generating high-temperature saturated steam. The high-temperature heat storage peak regulation operation system for low-heating-value gas power generation can adjust the power generation power of a power plant and improve the stability of a power grid load, and is a load side energy storage operation mode for constructing a novel energy system in China.

The utility model discloses equipment for improving supercritical CO2 extraction efficiency of plant solid powder, which comprises a raw material screw conveyor, a vertical extraction kettle, an annular supercritical CO2 annular steam pocket and a raffinate screw conveyor, wherein the volume of the vertical extraction kettle can reach hundred cubic meters, and the withstanding pressure of the vertical extraction kettle is 20-45MPa. A material turning system capable of lifting materials upwards from the bottom is arranged in the extraction kettle, a supercritical CO2 annular steam pocket which is in a sleeved state relative to the extraction kettle is located on the lower side of the extraction kettle, and a plurality of supercritical CO2 steam inlet pipes which are communicated with the supercritical CO2 annular steam pocket and the extraction kettle extend into pipeline parts of an inner cavity of the extraction kettle to be opened downwards. The supercritical CO2 fluid entering the inner cavity of the extraction kettle downwards impacts the bottom of the inner cavity of the extraction kettle and then reversely flows upwards. The extraction kettle disclosed by the utility model is large in volume and can be elastically adjusted, the extraction efficiency is improved by 30%, the operation time is saved by about 1 / 4-1 / 3, and the production automation can be realized.

The invention discloses a thermal power plant boiler fly ash fluidized bed heat storage and release system and a heat storage and release method, and relates to the technical field of electric heat storage. The system comprises a heating fluidized bed, a fly ash heat storage tank and a fluidization heat release tank, the bottom and the top of the fly ash heat storage tank are connected with the bottoms and the tops of the heating fluidized bed and the fluidization heat release tank through hot air circulating pipes respectively, and circulating fans are arranged on the hot air circulating pipes; fluidized bed partition plates are arranged in the heating fluidized bed, the fly ash heat storage tank and the fluidization heat release tank; a water-cooled wall tube is arranged in the fluidization heat release tank, the lower end of the water-cooled wall tube is connected with a water supply and steam pocket downcomer, and the upper end of the water-cooled wall tube is connected with a steam pocket. The coal ash of the thermal power plant is directly used as a heat storage medium to construct a closed-loop heat storage and release process, the coal ash disposal problem is solved, the material cost of the system is reduced, meanwhile, the peak regulation requirement of the power grid is met, resource utilization of the coal ash of the thermal power plant is achieved, the material cost of the heat storage system is reduced, and an efficient heat storage solution is provided for peak regulation of the power grid.

The invention discloses a large-flow low-temperature medium real-time vaporization system which is characterized in that 373-500K low-temperature water vapor is generated through three-component combustion of hydrocarbon fuel, air / oxygen and water, and hundred kilograms of high-pressure liquid nitrogen or liquid oxygen is vaporized into normal-temperature gas in real time through a dividing wall type heat exchange tube. The device is composed of a low-total-temperature fuel gas generator, a shell and a steam pocket, a first snakelike flow channel and a second snakelike flow channel are arranged in the shell, and a heat exchange structure is arranged between the first snakelike flow channel and the second snakelike flow channel; the first high-temperature medium inlet is communicated with the first end of the first snakelike flow channel, and the first normal-temperature medium outlet is communicated with the second end of the first snakelike flow channel; the second low-temperature medium inlet is communicated with the first end of the second snakelike flow channel, and the second normal-temperature medium outlet is communicated with the second end of the second snakelike flow channel. The device is applied to the field of low-temperature medium vaporization, liquid storage and gas supply of large-flow high-pressure low-temperature media can be achieved, and the safety and reliability of system operation are both considered.

A liquid blast furnace slag granulation and waste heat recovery system and method, which comprises a cyclone heat exchange device, a granulation device, a waste heat recovery device and a steam power generation device. Compressed air and water are mixed in the granulation device injector cavity to form a high-speed jet, which shears the molten blast furnace slag from the flow guide cover, and the molten slag is broken and solidified into solid particles; the granulated blast furnace slag enters the cyclone heat exchanger with high-temperature air and water vapor to achieve rapid separation, the deoxygenated water is transported into the spiral pipe bundle and exchanges heat with the high-temperature gas outside the pipe to obtain saturated or superheated steam, which is transported to the second heat exchanger of the waste heat recovery device; the high-temperature slag separated from the gas enters the first heat exchanger of the waste heat recovery device, and the cooling water flowing therein rapidly absorbs the heat of the high-temperature slag to change into water vapor; the saturated or superheated water vapor generated by the steam drum, the first and second heat exchangers of the cyclone heat exchange device enters the steam turbine to drive the power generation device, and finally the thermal energy is converted into electric energy which is supplied to users through the power transmission and distribution device.