770 results about "Superheater" patented technology

A turbine engine for an aircraft including a combustor, a turbine, and a steam system. The combustor generates combustion gases. The turbine receives the combustion gases and is drivingly coupled to a shaft. The steam system includes a boiler, a superheater, and a steam turbine. The boiler receives water and is fluidly connected to the combustor to receive a first portion of the combustion gases from the combustor and to boil the water to generate steam. The superheater is located downstream of the combustor to receive a second portion of the combustion gases from the combustor and to heat the steam. The steam turbine is fluidly coupled to the superheater to receive the steam from the superheater and to rotate the steam turbine. The steam turbine is drivingly coupled to the shaft.

Disclosed in the present invention are a main steam temperature control method and system for an incineration boiler of a waste incineration power plant. The method comprises: forming a cascade PID control dual-loop on the basis of a primary desuperheater, a primary superheater, a main PID controller and an auxiliary PID controller, and tuning the cascade PID control dual-loop; obtaining the current main steam flow rate, the current main steam temperature and the current boiler hearth temperature, and the main steam temperature and the boiler hearth temperature after a set delay time; obtaining the current actual waste treatment amount and the density of waste entering the incineration boiler, and calculating a predicted value of the current waste incineration heat; calculating a temperature feedforward value of the main steam temperature; and superimposing the temperature feedforward value and a temperature adjustment value output by the auxiliary PID controller in the cascade PID control dual-loop, generating a control value on the basis of the superimposed value, and controlling the water spraying amount of the primary desuperheater on the basis of the control value. In the present invention, on the basis of conventional PID cascade dual-loop control, correction value feedforward compensation is added to the control loop, thereby effectively improving the stability of the main steam temperature in waste incineration power generation.

This invention discloses a supercritical carbon dioxide cycle generator set water spray desuperheating system, comprising a supercritical carbon dioxide cycle power generation system and a water spray desuperheating system; the supercritical carbon dioxide cycle power generation system includes a heater, a screen-type superheater, a final-stage superheater, and a turbine; the water spray desuperheating system includes a first desuperheating water injection point, a second desuperheating water injection point, and a liquid-water separation system; the heater outlet is sequentially connected to the turbine inlet via the first desuperheating water injection point, the screen-type superheater, the second desuperheating water injection point, and the final-stage superheater; the turbine outlet is connected to the inlet of the liquid-water separation system; the liquid outlet of the liquid-water separation system is connected to the first and second desuperheating water injection points; and the gas outlet of the liquid-water separation system is connected to the heater inlet. This system can solve various problems caused by carbon dioxide desuperheating.

The invention relates to a solid oxide electrolytic cell hydrogen production system and an operation method thereof. The solid oxide electrolytic cell hydrogen production system comprises an SOEC galvanic pile module, a fan, an air electric heater, a steam superheater, a deionized water pump, a first preheater, a second preheater, a steam generator, a condenser, a high-pressure hydrogen cylinder, a high-pressure protective gas cylinder, a compressed air cylinder, a first electromagnetic valve and a second electromagnetic valve. Wherein the air electric heater is sequentially connected with the water vapor superheater and the SOEC stack module and can be used for heating air and water vapor at an inlet of the SOEC stack module. According to the embodiment of the invention, heating of air and water vapor at the inlet of the SOEC galvanic pile module is met by adopting the air electric heater, so that waste heat of mixed gas at the outlet of the SOEC galvanic pile module is utilized in a gradient manner, the electrolytic hydrogen production efficiency is effectively improved, meanwhile, the power consumption is effectively reduced, and the system is simple in design structure, convenient to realize low-cost manufacturing and suitable for popularization and application. And the high-efficiency and energy-saving electrolytic hydrogen production requirement can be met.

The invention provides an energy gradient utilization steam Rankine cycle power generation system and method for nuclear fusion, and belongs to the field of nuclear fusion energy conversion and utilization. Different temperature heat of a cladding, a divertor and a vacuum chamber is guided into a high-temperature independent heat storage loop, a medium-temperature independent heat storage loop and a low-temperature independent heat storage loop respectively, an operation section stores heat, and a pause section releases heat; feed water is heated step by step through a multi-stage preheater, an evaporator and a superheater according to the sequence of low temperature, medium temperature and high temperature, and superheated steam of 550 DEG C is formed to continuously drive a turbine to generate power. Decoupling of intermittent output of the fusion reactor and continuous operation of the power generation system is achieved, steam extraction of a steam turbine is omitted, the structure is simplified, and the energy utilization rate and the circulation efficiency are improved.

The utility model provides a peak-shaving steam supply system for deep waste heat utilization of a thermoelectric unit, which deeply recovers cold end waste heat and flue gas waste heat of a cogeneration unit, is coupled with a two-stage compression heat pump, extracts waste heat to heat demineralized water, and serves as a primary heat source for supplying industrial steam, so that the waste heat participates in external heat supply; the superheater utilizes the generating capacity of the unit to enable industrial steam to reach steam supply parameters, the waste heat of the unit and the generating capacity are combined for external steam supply, the circulating heat efficiency is improved, the steam supply capacity is improved, meanwhile, the on-grid electricity is reduced, thermoelectric decoupling is achieved, the unit adjusting operation interval is expanded, the operation cost and pollutant emission are reduced, and peak regulation or spot transaction earnings are improved. And a clean, low-carbon, flexible, efficient, economical and energy-saving combined heat and power generation system is constructed.

The invention discloses a small micro-superheated steam through-flow type gas condensation boiler, belongs to the technical field of boilers, and solves the problems that the current small gas boiler is developed towards the high-efficiency, low-emission and compact direction, and particularly pays attention to waste heat recovery and steam quality control. Comprising an annular water chamber allowing water to enter, a combustion chamber arranged above the annular water chamber and an ultra-low nitrogen surface fiber combustor located above the combustion chamber and communicated with the combustion chamber, and an annular steam chamber is arranged above the combustion chamber. The ultra-low nitrogen surface fiber burner works to burn gas and raise the temperature, and the composite fin straight water pipe converts water in the water pipe into wet steam through efficient heat exchange of the spiral fins and enters the annular steam chamber. External water is injected into the annular water chamber through the finned tube group of the flue gas condenser and the connecting tube, and then enters the steam chamber through the straight tube. Wet steam in the steam chamber enters the superheater through an inlet pipe to form micro superheated steam. Combustion smoke is condensed and discharged after being filtered by a filter screen and subjected to heat exchange, and dryness of the combustion chamber is guaranteed.

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 utility model discloses a phenol water recovery system of a two-section type gas producer. The phenol water recovery system comprises a gas producer, a phenol water superheater, a phenol water boiler and a gas cooler. According to the phenol water recovery system of the gas producer at the two ends, the phenol water in the gas can be recovered, the sensible heat of the gas at the lower section is used for heating the phenol water to form phenol water vapor, the phenol water vapor and a gasifying agent are heated together, and the phenol water vapor is introduced into the gas producer through the first gasifying agent inlet and the second gasifying agent inlet; the superheat degree of water vapor in the gasifying agent is high, so that phenol is prevented from being brought into ash slag through condensation of the water vapor, the ash slag is prevented from being changed into hazardous waste, the problem of wastewater treatment is thoroughly solved, sensible heat of lower-section coal gas is fully utilized, energy waste is avoided, and the heat efficiency is improved.

The invention belongs to the technical field of fused salt energy storage, and particularly relates to a thermal power generating unit deep peak shaving system and method of a fused salt heat storage coupling high-temperature heat pump. In the high-generation time period of renewable energy sources, the load of a thermal power generating unit needs to be reduced, at the moment, a boiler operates at the lowest stable combustion load, a fused salt heat storage system is added, all main steam is extracted to enter the heat storage system to heat fused salt, a high-pressure cylinder of a steam turbine is stopped, and an intermediate-pressure cylinder and a low-pressure cylinder of the steam turbine operate under the low-load working condition; the output load of the unit only meets the plant power, and the load is not output to the power grid; in the load rising time period, heat stored by the fused salt heat storage system is used for generating steam in the unit load rising stage to increase the unit steam turbine load rising rate and peak power generation; the problems of operation safety and low energy grade in the unit peak regulation process are solved. In the peak period of electricity utilization, heat stored in the fused salt heat storage system is released into the unit, and the output load of the unit is rapidly increased. An outlet of the deaerator serves as a water taking point, part of supplied water is extracted to pass through the preheater, the evaporator and the superheater to generate high-temperature and high-pressure steam, the high-temperature and high-pressure steam enters a high-pressure cylinder of the steam turbine to do work, and therefore the output load of the steam turbine is rapidly increased. The invention provides a thermal power generating unit deep peak regulation system and method of a fused salt heat storage coupling high-temperature heat pump, and aims to realize deep peak regulation of a unit and power generation by absorbing renewable energy sources such as wind and light.

The electric steam boiler system is characterized in that a water supplementing pipeline is connected with an electrode boiler through a fourth valve, the output of the electrode boiler is connected with a spherical tank through a pipeline and a first valve, and saturated steam directly discharged from the spherical tank is connected with a user side through a pipeline and a tenth valve; and the output of the spherical tank passes through the solid energy storage superheater before being connected with the user side through a pipeline and a third valve. The system is high in energy storage efficiency, long in service life and high in safety, the solid energy storage superheater directly heats saturated steam stored in the spherical tank, simultaneous charging and discharging can be achieved, the electric steam boiler system can rapidly adapt to changes of different heat using scenes and requirements, and the electric steam boiler system can produce both saturated steam and superheated steam.

The invention discloses a gas-liquid phase change compressed carbon dioxide energy storage system which comprises a gas storage unit, an energy storage unit, a liquid storage unit and an energy release unit which are sequentially connected in a closed loop mode, the energy release unit comprises a superheater, a high-pressure turbine, a reheater and a low-pressure turbine which are sequentially connected, and a second evaporator is arranged in an exhaust cylinder of the low-pressure turbine. The input end of the second evaporator is connected to the outlet end of the liquid storage unit, and the output end of the second evaporator is connected to the inlet end of the reheater. The second evaporator is configured to receive the liquid working medium from the liquid storage unit in the no-load starting stage of the energy release unit so that the liquid working medium can be evaporated and gasified, and therefore the exhaust temperature of the low-pressure turbine can be reduced, and the gaseous working medium formed through evaporation and gasification is input into the low-pressure turbine through the reheater to continue acting. Therefore, the risk of equipment damage caused by overhigh exhaust temperature during turbine operation is reduced, the exhaust heat of the turbine is recovered, the total air inflow of the turbine is reduced, and the overall efficiency of a system unit is improved.

The invention discloses a neutral organic chelating cleaning agent for a boiler, and belongs to the field of chemical cleaning of boiler superheaters of thermal power plants. The cleaning agent is prepared from the following components in percentage by weight: 0.5%-5% of ethylenediamine tetraacetic acid ammonium, 0.1%-4% of acetic acid or ammonium acetate, 0.1%-3% of glycollic acid ammonium or glycollic acid, 0.1%-5% of a pH regulator, 0.1%-1% of a cosolvent, 0.2%-0.8% of a corrosion inhibitor SH369, 0.1%-0.6% of a reducing agent, 0.0%-0.3% of a defoaming agent, 0.0%-0.2% of a surfactant and 84%-93% of water, wherein the pH value of the cleaning agent is 6-8; the cosolvent is tartaric acid and / or hydroxybutyl diacid, the surfactant is nonylphenol polyoxyethylene ether, and the reducing agent is hydrazine. The cleaning agent disclosed by the invention has good dissolving capacity on oxide skin, does not generate precipitates to cause pipe blockage, is a neutral solution, is very small in corrosivity, does not generate intergranular corrosion, is beneficial to protecting various pipes of superheaters and reheaters, and is a safe and efficient superheater cleaning agent.

The invention belongs to the technical field of alkane cracking processes, and provides an alkane raw material treatment device and method capable of efficiently recycling raw material cold energy, the alkane raw material treatment device comprises a gasification assembly, the gasification assembly comprises a throttle valve, the discharge end of the throttle valve is communicated with a cold end flow channel of a cold energy heat exchanger, and a hot end flow channel of the cold energy heat exchanger is circularly connected with a cold energy user; the gas-liquid separation assembly comprises a gas-liquid separation tank, a gas phase outlet of the gas-liquid separation tank is communicated with compression equipment, and a liquid phase outlet of the gas-liquid separation tank is communicated with a liquid alkane vaporizer; the raw material heating assembly comprises a raw material superheater, a feeding port of the raw material superheater is communicated with a discharging port of the compression equipment, and a discharging port of the raw material superheater is communicated with follow-up processing equipment. In the alkane gasification process, the alkane cooling capacity can be efficiently and stably recycled and utilized, and the purposes of reducing cost and improving efficiency can be achieved.

The invention provides a nickel-based protective coating as well as a preparation method and application thereof. The nickel-based protective coating comprises a Ni-Cr-Nb bonding layer and a Ni-Cr-Mo-W functional layer, the Ni-Cr-Nb bonding layer is prepared from, by mass, 58%-65% of Ni, 15%-22% of Cr, 2%-4% of Nb, 0.5%-1.5% of Ti and 0.05%-0.1% of rare earth elements. The Ni-Cr-Mo-W functional layer is prepared from, by mass, 52%-57% of Ni, 22%-25% of Cr, 4%-7% of Mo, 3%-5% of W, 0.8%-1.2% of B, 0.8%-1.3% of Si and 0.05%-0.12% of rare earth elements. The rare earth element comprises any one or a combination of at least two of Y, La, Ce or Gd. The nickel-based protective coating can be applied to a boiler superheater and a boiler reheater which serve under extreme working conditions such as high temperature of 600 DEG C or above, chlorine and sulfur synergistic corrosion and high-speed flue gas scouring for a long time, the service life of the boiler superheater and the boiler reheater is greatly prolonged, and the risk of unplanned shutdown is reduced.

The invention relates to a direct current furnace machine-furnace coordination system dynamic modeling method suitable for a wet condition. Based on the law of mass conservation and energy conservation, a lumped parameter method is adopted to construct a dynamic model comprising a coal pulverizing system, a coal economizer-water wall system, a water storage tank system, a superheater system and a steam turbine system; identifying parameters are optimized step by step by only utilizing unit variable load dynamic operation data and combining with the mechanism constraint that the heat absorption capacity of a working medium is monotonically increased along with the coal quantity as fired: static parameters are determined through dynamic data regression, nonlinear parameters are optimized based on a preset water-cooled wall outlet flow and dryness function structure, and the heat absorption capacity of the working medium is calculated. And finally, identifying dynamic parameters step by step by adopting an immune genetic algorithm. The dynamic characteristics and the physical consistency of the established model are verified through open-loop simulation, and the technical problems that dynamic description of the water level of the water storage tank is missing and the modeling precision is low under the wet working condition are solved.

The invention discloses a thermal power generating unit boiler wall temperature early warning method and device, and the method comprises the steps: determining a steady-state working condition according to boiler operation parameters; the boiler operation parameters comprise coal feeding quantity, water feeding quantity, primary air quantity and secondary air quantity; calculating the wall temperature change rate of each monitoring point in a preset time window; the time window is set according to a data smooth filtering requirement and an early warning response timeliness requirement, and the monitoring points comprise a superheater, a reheater and a water cooling wall; and if the wall temperature change rate of at least one monitoring point is greater than or equal to a preset early warning threshold value and the duration is greater than or equal to a corresponding time threshold value, executing a corresponding early warning strategy. Whether the boiler is in the steady-state operation state or not is recognized before early warning is triggered, so that wall temperature fluctuation interference in the normal dynamic process such as unit load adjustment and combustion working condition fine adjustment is eliminated, it is avoided that the normal working condition is misjudged to be abnormal, the early warning timeliness of the wall temperature of the boiler is improved, meanwhile, the misjudgment rate is reduced, and the early warning accuracy is improved.

The invention discloses a steam temperature control method for a tower type solar photo-thermal power station, which fuses the control of a hot molten salt delivery pump and the control of inlet hot molten salt regulating valves of a superheater and a reheater according to the control characteristics of a regulating loop so as to effectively relieve the influence of temperature lag. Compared with the prior art, the method provided by the invention is based on an independent and decoupled operation mode of a superheated steam and reheated steam temperature adjusting loop so as to efficiently respond to the requirement of power change of the steam turbine generator unit. Meanwhile, the operation state and the change trend of the superheated steam temperature adjusting loop and the reheated steam temperature adjusting loop can adjust the operation of the hot salt pump flow adjusting loop. In order to organically coordinate the mutual relation, a control method based on the valve position of a regulating valve and the deviation characteristic of a control loop is set, and the valve position relation characteristic of the regulating valve in the superheated steam and reheated steam temperature regulating loop and the deviation state and trend information of the regulating loop are introduced into a combined valve position integrator and a combined monitor; operation of the hot salt pump flow adjusting loop is adjusted in real time through monitoring and judgment of the two.

The invention relates to a method for detecting microcracks on the inner wall of a wall enclosure superheater of a boiler. The method comprises the following steps: macroscopically identifying and preliminarily screening a high-risk area; creating an endoscope channel based on the primary suspicious area list and performing primary peeping on the inner wall; carrying out detection surface preparation and acoustic coupling optimization; data acquisition is carried out through accurate arrangement of the small-sound-velocity self-coupling phased array ultrasonic probe; extracting defect signal features and carrying out three-dimensional digital modeling; performing crack depth accurate quantization based on a time of flight diffraction mode; carrying out comprehensive data analysis and evaluating a security level; and integrating detection results, and generating a digital file based on the results. According to the invention, standardization of the detection process and systematization of data management can be realized, the detection efficiency and accuracy are greatly improved, a scientific basis is provided for equipment life prediction and maintenance decision, and the safe operation level of the boiler is effectively improved.

The invention belongs to the field of metal welding materials, and discloses a gradient cladding layer for a superheater / reheater tube and a preparation method and application of the gradient cladding layer. The gradient cladding layer is characterized in that a bottoming laser cladding layer is formed on a superheater / reheater tube, an electric arc surfacing cladding layer is formed on the bottoming laser cladding layer, and the electric arc surfacing cladding layer is in direct contact with a hearth atmosphere; the bottoming laser cladding layer comprises the following components in percentage by weight: 30-40% of Ni, 22-25% of Cr, 5-8% of Mo, 0.8-2% of Nb, 0.5-1% of Si, 0.5-1% of Mn and the balance of Fe; the arc surfacing cladding layer comprises the following components: 40-45% of Cr, 16-19% of Fe, 12-15% of Nb, 8-10% of Mo, 3-4% of Ti, 1.5-2.5% of Al and the balance of Ni, and the total percentage is 100%. The gradient cladding layer disclosed by the invention is excellent in corrosion resistance and low in stress, and meets the safe service of the superheater / reheater.

The utility model discloses a circulating fluidized bed boiler suitable for high-alkali and high-chlorine coal. The circulating fluidized bed boiler comprises a hearth, a cyclone separator, a steam cooling flue and a tail flue which are connected in sequence, a water cooling screen is arranged in the hearth; the lower end of the cyclone separator is connected with a material returning device, the material returning device is connected with the lower part of the hearth through a first-stage material returning pipe and connected with an external bed through a connecting pipe, a high-temperature superheater is arranged in the external bed, and the external bed is connected with the lower part of the hearth through a second-stage material returning pipe; the steam cooling flue is divided into a steam cooling down flue and a steam cooling up flue through a longitudinal partition wall connected with the top of the steam cooling flue, and a water cooling tube bundle is arranged in the steam cooling up flue; according to the utility model, contamination and corrosion of high-alkali and high-chlorine coal for combustion to a heating surface can be prevented, damage to equipment in the boiler is avoided, and long-period stable operation of the boiler is realized.

The invention discloses a multi-stage ammonia-doped combustion nitrogen and carbon reduction system for a coal-fired boiler. The system comprises an ammonia supply device and a boiler, the ammonia supply device is arranged on one outer side of the boiler; a pulverized coal burner, a pure ammonia burner, a first-stage ammonia gas multi-nozzle spray gun, a first-stage ammonia-hydrogen mixed gas multi-nozzle spray gun, a flue gas NOX concentration detector, a second-stage ammonia gas multi-nozzle spray gun, a second-stage ammonia-hydrogen mixed gas multi-nozzle spray gun and a platen superheater are arranged in the boiler; the ammonia supply device is respectively connected with the pure ammonia burner, the first-stage ammonia gas multi-nozzle spray gun, the first-stage ammonia-hydrogen mixed gas multi-nozzle spray gun, the second-stage ammonia gas multi-nozzle spray gun and the second-stage ammonia-hydrogen mixed gas multi-nozzle spray gun. According to the invention, the coal-fired unit is subjected to multi-stage blending combustion of ammonia gas and is provided with multi-stage SNCR denitration reaction zones, so that the replacement of zero-carbon fuel ammonia to coal is realized, the requirement on the concentration of nitrogen oxide in front of the inlet of the original SCR device of the unit is met, and a new way is provided for carbon emission reduction of a coal-fired boiler.

To make it possible to restrain a rise in the liquid level of liquefied gas accumulated in a lower part of a container when the liquefied gas is vaporized, and discharge the liquefied gas inside the container without using a pump even when the liquid level has risen.SOLUTION: A liquefied gas vaporizer unit comprises a vertical container 2a in which a horizontal cross section area of a heat exchange space K to which liquefied ammonia X is supplied is smaller than a vertical cross section area thereof, a liquefied ammonia supply part 3 for supplying the liquefied ammonia X to the heat exchange space K of the vertical container 2a, a heating fluid guide pipe 2d inserted into the heat exchange space K of the vertical container 2a, a seawater supply part 4 for supplying seawater Y to the heating fluid guide pipe 2d, a superheater 5b for superheating vaporized gas discharged from the vertical container 2a, and an accumulated liquefied ammonia discharge part 6 for discharging the liquefied ammonia X accumulated in the heat exchange space K of the vertical container 2a, from the vertical container 2a by using a differential pressure between the heat exchange space K of the vertical container 2a and a discharge destination.SELECTED DRAWING: Figure 1

The invention relates to the technical field of industrial heat pumps, in particular to a transcritical CO2 circulation system capable of achieving 120 DEG C high-temperature heat tracing in a petroleum process and a control method of the transcritical CO2 circulation system. The circulating system comprises a water pump, a gas cooler, an air source evaporation part, a waste heat superheater and a compressor. The gas cooler, the air source evaporation component, the waste heat superheater and the compressor are sequentially connected, and the water pump is connected with the gas cooler. The water pump is used for providing to-be-heated water for the gas cooler; the gas cooler is used for heat exchange between the supercritical carbon dioxide working medium and water to be heated; the air source evaporation part is used for heat exchange between the external environment and the carbon dioxide working medium output by the gas cooler; the waste heat superheater is used for heat exchange between the waste heat resource and the carbon dioxide working medium output by the air source evaporation component; the compressor is used for compressing the carbon dioxide working medium output by the waste heat superheater to obtain the supercritical carbon dioxide working medium. According to the embodiment of the invention, the heat supply temperature and stability can be improved.

The invention relates to the technical field of soot blowing devices, and discloses a boiler superheater soot blowing device which comprises a pipeline system provided with a main pipe and branch pipes, the main pipe is distributed along the X axis and arranged on one side of the bottom of an in-boiler superheater, and the branch pipes are distributed along the Y axis, welded to one side of the main pipe and communicated with the main pipe; the ends, away from the main pipe, of the branch pipes extend to the bottom of the boiler superheater, a plurality of air holes with upward openings are formed in the surfaces of the branch pipes in the Y-axis direction at equal intervals, every two adjacent air holes form a group, and the two air holes in each group incline relatively to form an included angle. When the smoke passes through the smoke channel, the smoke collides and diffuses at the vertex of the included angle to form an air bed, so that the passing smoke is always in a boiling state and cannot be deposited; through the unique air hole collision design and the knocking system, by means of a turbulence area formed by collision airflow and vibration sonic boom, smoke dust is effectively removed and prevented from being deposited, and the risk of dust deposition is reduced.

The embodiment of the present disclosure provides a molten salt-based gas-steam combined heat storage system and a capacity calculation method. The system comprises a gas turbine, a boiler, a gas heat exchanger, a steam heat exchanger, a high-temperature molten salt storage tank and a low-temperature molten salt storage tank. The outlet of the gas turbine is connected with the inlet of the flue of the boiler. The gas heat exchanger is connected with the flue between the gas turbine and the high-temperature reheater and the high-pressure superheater in the boiler. The steam heat exchanger is connected with the steam-water pipeline between the high-pressure superheater and the high-pressure drum and the low-pressure drum in the boiler. The low-temperature molten salt storage tank is connected with the high-temperature molten salt storage tank through a molten salt conveying pipeline. The molten salt conveying pipeline is sequentially connected with the steam heat exchanger and the gas heat exchanger. The low-temperature molten salt is heated to high-temperature molten salt when passing through the steam heat exchanger and the gas heat exchanger along the molten salt conveying pipeline. The system realizes reasonable distribution of steam flow and gas flow, significantly improves the heat exchange efficiency of the heat storage heat exchanger, improves the energy storage density per unit mass of the molten salt heat storage system, and reduces the cost.

The invention relates to an electric heating fused salt heat storage-heat supply system for quickly absorbing wind and light output fluctuation. The electric heating fused salt heat storage-heat supply system comprises a low-temperature fused salt tank, a high-temperature fused salt tank, a multi-stage electric heater array, a fused salt pump, a regulating valve, a switch valve, a temperature measuring point, a preheater, an evaporator, a superheater, a water supply pump, a water supply unit and a matched pipeline. The system adopts hierarchical control: a first-stage electric heater array operates at a constant flow within a set time so as to respond to power fluctuation from a second stage to a minute stage; and the second-stage electric heater array is used for coping with minute-level to hour-level power fluctuation by adjusting the flow of the molten salt and stabilizing the temperature of a molten salt outlet. In the occasion where the temperature of the high-temperature molten salt needs to be strictly controlled, the system can guarantee the temperature quality of the high-temperature molten salt by additionally arranging a molten salt loop. The heat sink effect of the molten salt in the low-temperature molten salt tank can effectively buffer temperature sudden change and stabilize a flow field. Qualified high-temperature fused salt can be continuously output under high-fluctuation electric energy input, and steam is stably supplied.

The invention relates to the technical field of physical engines, in particular to a boiler heat transfer inertia determination and boiler heat transfer inertia regulation and control analysis method and device, and the method comprises the following steps: discretizing a superheater tube wall and a header into Lagrange material points carrying mass, temperature and stress information according to the geometric structure and material physical property parameters of a boiler; according to the method, by analyzing the geometric structure and the material physical property parameters of the boiler, a heated part is dispersed into material points carrying mass, temperature and stress information, and coupling treatment is achieved in a grid covering a fluid domain and a solid domain, so that the heat transfer process can be continuously tracked on the global scale, and the heat transfer efficiency is improved. And by executing mapping between material point information and grid nodes under variable working conditions, distribution changes of momentum and energy can be synchronously obtained, and change results are returned and updated to the material points in real time, so that dynamic interaction of the position, the temperature and the stress is realized, and time sequence evolution of heat transfer inertia is described with higher precision.

This invention discloses a system for improving the efficiency of power generation and coupling heat supply using a gas-fired superheater with multiple steam sources. It belongs to the field of waste heat power generation technology in steel enterprises. To utilize waste heat steam sources of different qualities in steel enterprises for power generation, the system includes an electric furnace waste heat system (1), a converter waste heat system (2), a sintering waste heat system (3), a rolling mill heating furnace waste heat system (4), a steam storage tank (5), a gas-fired steam superheater (6), a power generation system (7), and a hot water storage tank (8). This system not only integrates waste heat steam sources of various parameters and qualities within the steel plant for power generation, but also recovers heat from the circulating cooling water of the generator set and supplies hot water externally, further improving the waste heat utilization rate.

This invention discloses a novel, low-load, high-efficiency thermoelectric decoupling heating system. The system is characterized by replacing the high-pressure bypass section with an extraction section. This extraction section extracts steam from the middle of the superheater and uses this steam to heat the secondary air or drive the induced draft fan. Compared to existing technologies, this invention, after heating the secondary air or driving the induced draft fan, returns the steam to the cold section, thus overcoming the problem of limited extraction capacity in conventional systems. It also allows for changes in the coal-to-water ratio within the boiler under low load conditions, increasing the outlet steam temperature of the superheater and reheater under low load conditions, and avoiding the widespread problem of underheating of main steam and hot reheat steam under low load conditions.