975results about "Feed-water heaters" patented technology

The invention belongs to the technical field of power station boiler waste heat recycling energy-saving equipment and relates to a plate-and-shell type coal economizer. The plate-and-shell type coal economizer comprises a corrugated plate heat exchange core body (1), a heat exchanger shell (2), a first and a second water inlet / outlet water tank (3, 3') and a first and a second exhaust gas inlet / outlet pipeline (4, 4'), wherein the corrugated plate heat exchange core body (1) is mounted in the heat exchanger shell (2), the first and second water inlet / outlet water tanks (3, 3') are respectively arranged at the upper and lower ends of the front side of the corrugated plate heat exchange core body (1), and the first and second exhaust gas inlet / outlet pipelines (4, 4') are respectively arranged at the upper and lower sides of the corrugated plate heat exchange core body (1). The plate-and-shell type coal economizer solves the problem that the length of a water passage needs to be increased to solve the problem of unapparent water heating due to the great difference between an exhaust gas density and a water density, and meanwhile, a corrugated passage at the exhaust gas side enables the exhaust gas flow turbulivity to be increased and the heat transfer efficiency to be improved; the blockage due to ash accumulation happens rarely, even if the ash is accumulated, the cleaning is easy to finish.

The invention discloses a dynamic monitoring-based deaerator water supply control method and system for a nuclear power plant, and relates to the field of deaerator water supply control, and the method comprises the steps: firstly, through a hybrid online identification algorithm, analyzing a historical valve position instruction and a water supply flow sequence in real time, and dynamically estimating the local gain and hysteresis width of a valve under the current working condition; then, the parameters identified in real time are utilized to carry out prospective compensation on the expected flow variation calculated by the main controller. In other words, the instruction amplitude is adjusted according to the estimated local gain, and it is ensured that consistent flow response can be obtained under different loads; meanwhile, when the instruction is reverse, the compensation amount is actively applied according to the estimated hysteresis width so as to eliminate the adjustment dead zone and oscillation caused by hysteresis. In this way, the nonlinear object of the valve is equivalent to a linear link with consistent response, and the stability and accuracy of the deaerator water level control system in the full working condition range are remarkably improved.

The invention relates to the technical field of thermal engineering, and discloses a horizontal split type rotating film deaerator which comprises a first-stage deoxidizing part and a second-stage deoxidizing part on one side of the first-stage deoxidizing part, an annular air inlet part is installed on the side, close to the second-stage deoxidizing part, of the first-stage deoxidizing part, and an annular water inlet part is arranged on the side, away from the second-stage deoxidizing part, of the annular air inlet part. A packing layer is installed on the side, close to the first-stage deoxidizing piece, of the second-stage deoxidizing piece, a gas conveying piece is arranged on the side, perpendicular to the second-stage deoxidizing piece, of the packing layer, a first butt joint piece is fixedly connected to the side, away from the first-stage deoxidizing piece, of the second-stage deoxidizing piece, and a deoxidizing water tank is fixedly connected to the side, away from the second-stage deoxidizing piece, of a first mounting piece. According to the device, conveying pipes in four directions are arranged on the annular water inlet piece and the annular air inlet piece correspondingly, the flow dividing assembly is placed outside the first-stage deoxidizing piece, and damage caused by long-time internal water supply flushing and heating is reduced.

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 steam boiler with a steam waste heat recovery function, which comprises a steam boiler body, a combustion chamber, a box body, a combustor, a steam pipe, a smoke exhaust pipe, a drainage mechanism, a connecting pipe, a water inlet pipe and a heat exchanger, the combustion chamber is arranged in the steam boiler body, and the combustor is arranged on one side of the combustion chamber; and a steam pipe is arranged at the top of the steam boiler body. According to the steam boiler with the steam waste heat recovery function, in the aspect of waste heat recovery, the heat exchanger of a composite structure of the heat conduction pipe and the spiral pipe is adopted, sensible heat and latent heat of high-temperature smoke in the smoke exhaust pipe are efficiently captured, and heat is rapidly transferred to a water inlet system through low-boiling-point heat conduction liquid; the waste heat of the flue gas which is directly discharged originally is fully recycled, and the energy loss is greatly reduced.

The invention discloses a cross-temperature-zone heat storage steam supply system and a working method thereof, and belongs to the technical field of heat storage and supply. According to the system, a first inlet of a hot water storage tank is connected with an outlet of a circulating deoxidizing hot water generating unit, and a first outlet of the hot water storage tank is connected with one end of a pressure reducing throttle valve; an inlet of the molten salt hot storage tank is connected with an outlet of the molten salt cold storage tank, and an outlet of the molten salt hot storage tank is connected with a second inlet of the molten salt heat exchanger; the solid heat storage unit is connected with the solid heat storage electric heater, and an outlet of the solid heat storage unit is connected with a second inlet of the secondary overheating heater; the other end of the pressure reducing throttle valve is connected with a first inlet of the molten salt heat exchanger or the primary superheater, a first outlet of the molten salt heat exchanger or the primary superheater is connected with a first inlet of the secondary superheater, and a first outlet of the secondary superheater is connected with a steam pipe network. Hot water heat storage and vaporization can be integrated, and efficient heat supply in different temperature zones can be achieved.

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 invention discloses a circulating fluidized bed boiler water supply optimization method and system, and belongs to the technical field of boiler energy conservation. The system mainly comprises a condensate water tank, a demineralized water tank, a slag cooler, a deoxygenization water tank, a condensate water pump, a demineralized water pump, a plate heat exchanger, a reverse osmosis membrane group, a demineralized water buffer tank and the like. The principle of'condensate water priority 'is adopted, the supply amount of condensate water is preferentially adjusted according to the liquid level of the deoxygenated water tank through the intelligent control unit, and the insufficient part is supplemented by demineralized water; the demineralized water subjected to heat exchange by the slag cooler is intelligently distributed to a demineralized water tank, a condensation water tank or a deoxygenization water tank according to the water outlet temperature; the plate heat exchanger can preheat reverse osmosis inlet water by adopting a desalting water mode or a steam mode; the demineralized water buffer tank effectively inhibits water impact. Dynamic balance and heat energy gradient utilization of steam condensate water and demineralized water are achieved, the problems of water tank overflow and energy waste are effectively solved, and the economical efficiency and stability of boiler operation are remarkably improved.

The embodiment of the invention provides a multi-steam-source cooperative frequency modulation combined heat and power generation system and a control method. The system comprises a boiler, a high-pressure cylinder, an intermediate-pressure cylinder, a low-pressure cylinder, a power generator, a multi-stage regenerative heater, a heating system and a heating steam supply pipeline. A main steam outlet of the boiler is connected to the high-pressure cylinder through a main steam pipeline, a steam exhaust port of the high-pressure cylinder is connected to the intermediate-pressure cylinder through a pipeline, a steam exhaust port of the intermediate-pressure cylinder is connected to the low-pressure cylinder through a pipeline, and a steam exhaust port of the low-pressure cylinder is connected to the generator through a pipeline. A condensate water outlet of the medium-pressure cylinder is communicated to a condensate water inlet of the boiler through a first condensate water pipeline; the heating system is communicated with a steam exhaust port of the medium-pressure cylinder through a heating steam supply pipeline; the multi-stage regenerative heater is arranged on the first condensate water pipeline and connected with the high-pressure cylinder and / or the intermediate-pressure cylinder through steam extraction pipelines, and steam extraction adjusting valves are correspondingly arranged on the steam extraction pipeline between the high-pressure cylinder and the multi-stage regenerative heater and / or the steam extraction pipeline between the intermediate-pressure cylinder and the multi-stage regenerative heater.

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 the technical field of high-efficiency recovery of low-temperature exhaust gas, in particular to a high-temperature cooking waste heat recovery system for white spirit brewing. The white spirit brewing high-temperature cooking waste heat recovery system comprises a cooking barrel, a compressor, an embedded plate heat exchanger, a condensate water tank and a circulating pump, a liquid inlet of the cooking barrel is communicated with one end of a water supplementing pipe, an air inlet of the compressor is communicated with a waste gas outlet of the cooking barrel, and the compressor is used for compressing steam to obtain high-temperature and high-pressure steam. A steam inlet of the embedded plate heat exchanger is communicated with an air outlet of the compressor, and a steam outlet of the embedded plate heat exchanger is communicated with a steam inlet of the cooking barrel through a steam conveying pipe. By adopting the arrangement mode, waste heat steam is utilized twice to recover heat, high-efficiency energy utilization can be realized, energy consumption and carbon emission are reduced, and meanwhile, the cooking efficiency and the grain quality are improved.

The invention relates to a power station boiler self-adaptive load combined preheating recovery system which comprises a preheating system, a monitoring module and a regulation and control module, and the preheating system comprises a heat pipe heat exchanger set and a heat pump system; the heat pipe heat exchanger set is used for recycling high-grade flue gas waste heat in a combustion system in a power station boiler to preheat water in a water supply pipeline. The heat pump system is used for recycling low-grade flue gas waste heat of a second flue in the power station boiler to preheat ambient air at the inlet end of the air conveying fan; the monitoring module is used for collecting flue gas data of a first flue and a second flue in the power station boiler and a current load mode of the power station boiler; and the regulation and control module is used for dynamically regulating operation parameters of the heat pipe heat exchanger group and / or the heat pump system based on the flue gas data of the power station boiler and the current load mode, so that the regulated heat pipe heat exchanger group and the regulated heat pump system are used for recovering flue gas waste heat for preheating. Waste heat efficient recovery and stable operation of the boiler within the range from full load to deep adjustment load are achieved.

The invention discloses a thermal deoxygenization device, a steam generator and a heat pump unit. The thermal deoxygenization device comprises an upper cover plate and a lower cover plate, the middle baffle is located below the upper cover plate, and the middle baffle and the upper cover plate are connected in a sealed mode to form a water storage chamber; the bottom plate is provided with dripping holes and located below the middle baffle, a deoxidizing chamber is arranged between the middle baffle and the bottom plate, one end of the deoxidizing chamber is opened to serve as a steam inlet, and the other end of the deoxidizing chamber is opened to serve as a steam outlet; the baffle assembly is located in the deoxidizing chamber, the baffle assembly comprises a plurality of deflection baffles which are sequentially arranged at intervals from the steam inlet to the steam outlet, and a deflection flow channel is formed between every two adjacent deflection baffles; wherein the middle baffle is provided with a plurality of spray heads for spraying water in the water storage chamber to the deoxidizing chamber, and the spray heads are arranged along the baffling flow channel. High-temperature steam is used for heating water to achieve the deoxygenization effect, the installation space is saved, system heat is efficiently utilized, the influence of the environment on the system is reduced, and the maintenance cost is greatly reduced.

The invention relates to the technical field of gas-fired boilers, in particular to a distributed energy system based on a gas-fired boiler and an operation method. A three-layer convolutional neural network model is adopted by a load prediction module of the intelligent control platform, a cooling, heating and power load prediction value is output through convolutional layer feature extraction and a full connection layer, and an energy scheduling module is combined based on a model prediction control algorithm, and the lowest system operation cost is taken as a target. State variables such as steam pressure and the opening degree of a fuel regulating valve are optimized in a rolling mode, the load prediction accuracy and the multivariable collaborative optimization capacity are improved, and steam emptying is reduced. A steam exhaust port of a low-pressure steam turbine of a double-shaft back pressure type steam turbine set is divided into two paths which are connected with a steam-water heat exchanger and an absorption refrigerator respectively, steam exhaust flow distribution is adjusted through an electric adjusting valve, a water heat storage tank and a lithium battery energy storage system are combined, cooperative control is conducted through an energy management gateway, heat is stored and released during heat load fluctuation, and charging and discharging are conducted in the valley-peak section of a power grid. The heat-to-electricity ratio adjusting range is widened, and insufficient heat supply is reduced.

The invention relates to a boiler flue gas heat recovery system which comprises a heat supply device, the heat supply device comprises a boiler and a heat supply pipeline, the heat supply pipeline comprises a boiler water inlet pipe and a boiler water outlet pipe which communicate with the boiler, a flue is formed in a smoke exhaust device, and a first heat exchanger and a second heat exchanger are sequentially arranged in the flue in the flue gas flowing direction; the first waste heat recovery device comprises a first waste heat recovery flow path and a heat pump, the first waste heat recovery flow path is connected with the first heat exchanger and a boiler water inlet pipe, the heat pump is arranged on the first waste heat recovery flow path, the second waste heat recovery device comprises a second waste heat recovery flow path, and the second waste heat recovery flow path communicates with external air and a boiler. By arranging the heat pump, on one hand, the heat transfer temperature difference can be increased, smoke sensible heat and even part of latent heat can be efficiently recycled, on the other hand, the recycled heat can be flexibly adjusted according to changes of boiler loads, and therefore the system can adapt to changes of loads output by the system under different conditions.

A unit load increasing system based on a high-enthalpy-value steam source driving water feeding pump turbine comprises a boiler, a main turbine, the water feeding pump turbine, a steam condensing system, a reheating steam extraction system, a heat regeneration system and a water feeding pump turbine steam distribution system. The reheating steam extraction system comprises N sections of extraction steam, hot section reheating steam and cold section reheating steam, the i-th section of extraction steam is a working steam source for driving the water feed pump turbine, the cold section reheating steam is a high-pressure low-enthalpy-value steam source of the water feed pump turbine, the i-1-th section of extraction steam and the hot section reheating steam are high-enthalpy-value steam sources of the water feed pump turbine, i is larger than 3 and smaller than N, and N and i are integers; the steam distribution system of the feed pump turbine comprises a working steam distribution unit, a high-pressure low-enthalpy-value steam distribution unit, a high-enthalpy-value steam distribution unit and a main steam distribution unit. When the unit operates with increased load, the high enthalpy value steam source is gradually merged into the working steam source, and the steam inlet enthalpy value of the feed pump turbine is increased, so that the work output of the feed pump turbine is increased, and the electrical load of the unit meets the requirements of a power grid.

A method for heat integration between a chemical synthesis plant that runs an exothermic reaction and (ii) and a partner plant that generates a working fluid such as steam (e.g., runs a power cycle). The present disclosure describes both internal and external heat integration. Internal heat integration may provide heat from the exothermic reaction (e.g., from methanol synthesis) to a reboiler associated with a distillation column of the chemical synthesis plant. External heat integration may use heat from the exothermic reaction to preheat a condensed water stream (which stream is downstream from the turbine and condenser of the power cycle). Such reduces the need for bleed off the turbine to preheat condensed water as part of the power cycle. A bleed off the turbine provides heat to the reboiler associated with the distillation column of the chemical synthesis plant. Heat integration provides overall improved energy use within both plants.

The invention belongs to the technical field of flexibility improvement and transformation of coal-fired power generation, and discloses a multi-parameter optimization method for optimizing equivalent electricity-electricity efficiency of an electric heating fused salt heat storage pure condensing power generation system, which comprises the following steps of: firstly, determining a fused salt heat storage medium temperature interval, a steam generator heat transfer structure and key parameters of a power generation subsystem; the main steam pressure, the reheating steam extraction pressure and the like are used as optimization variables; secondly, on the basis of thermodynamic feasibility and equipment safety, setting boundary conditions such as main steam pressure grading limitation, a deaerator operation boundary, a fused salt thermal stability threshold value and a heat exchanger heat transfer economical efficiency constraint; then, the heat exchange power of a steam generator is calculated through the reference working condition, the cold and hot salt design temperature and the heat exchange area are determined by combining the fused salt heat exchange temperature difference, and the fused salt mass, the heat storage tank volume and the electric heater power are calculated according to heat absorption and release balance; and finally, iteratively optimizing the key parameters by adopting a multi-parameter optimization algorithm until the equivalent electricity-electricity efficiency is optimal. The problems that in a traditional method, parameter collaboration is poor, constraint conditions are ignored, and global optimization is insufficient are solved, the operation efficiency and economical efficiency of the electric heating fused salt heat storage pure condensing power generation system are remarkably improved, and green and sustainable development of energy is facilitated.

The present invention discloses an efficient thermal system based on a wide-range supercharging module and its operation method, comprising a boiler, high-, medium-, and low-pressure cylinders, and a generator; further comprising a wide-range supercharging module, wherein the supercharging cylinder of the wide-range supercharging module is coaxially arranged with the high-pressure cylinder; one end of the main steam pipeline main pipe of the main steam pipeline is connected to the boiler, and the other end thereof is connected in parallel to the first and second steam inlet branches; the first and second steam inlet branches are respectively provided with first and second steam inlet regulating valves; the supercharging cylinder is connected to the second steam inlet branch and the wide-range feedwater warmer via a first exhaust pipeline and a first extraction pipeline; the first exhaust pipeline and the first extraction pipeline are respectively provided with a first exhaust valve and a first extraction valve; one end of the first exhaust pipeline is connected to the exhaust port of the supercharging cylinder, and the other end thereof is connected to the second steam inlet branch; a third steam inlet regulating valve is provided on the second steam inlet branch between the first exhaust pipeline and the first steam inlet branch. The present invention can operate efficiently under high load, has low construction cost, and improves operational flexibility.

The invention relates to the technical field of waste heat recovery, in particular to a boiler flue gas waste heat utilization system which comprises a flue, an economizer, a heat transfer pipeline, a dust removal mechanism and a turbulent flow mechanism. The flue is connected with the economizer, the heat transfer pipelines are evenly arranged in an inner cavity of the economizer, the dust removal mechanism is arranged at the bottom of the inner cavity of the arc surface area of the flue, the turbulent flow mechanism is arranged on the outer side wall of the inner cavity of the arc surface area of the flue, and the turbulent flow mechanism can increase turbulent flow of flue gas when the flow speed of the flue gas is low and can capture particles in the flue gas. The dust removal mechanism is matched with the turbulent flow mechanism to isolate and remove particles and dust in the flue cambered surface area, the influence caused by the scaling phenomenon in the flue cambered surface area is reduced, meanwhile, the scaling phenomenon at the heat transfer pipeline is reduced, and the scaling is prevented from influencing the heat transfer efficiency; and meanwhile, the high-speed airflow and the low-speed airflow are dynamically adjusted respectively, so that the heat transfer efficiency is further improved.

A heat generating device includes: a sealed container; a tubular body provided in a hollow portion of the sealed container; a heat generating element provided on an outer surface of the tubular body and configured to generate heat by occluding and discharging hydrogen supplied to the hollow portion; and a flow path formed by an inner surface of the tubular body and through which configured to allow a fluid that exchanges heat with the heat generating element to flow. The heat generating element includes a base made of a hydrogen storage metal, and a multilayer film provided on the base. The multilayer film has a first layer made of a hydrogen storage metal and having a thickness of less than 1000 nm, and a second layer made of a hydrogen storage metal, which is different from that of the first layer, and having a thickness of less than 1000 nm.

The invention relates to the technical field of waste heat recovery, and particularly discloses a waste heat recovery device of a steam boiler, the waste heat recovery device comprises a boiler body, the top of the boiler body is provided with a flue pipe, a fixed pipe, a heat recovery assembly and a discharge pipe, and the flue pipe is fixedly communicated with the top of the boiler body; flue gas enters the chimney through the flue pipe and the fixed pipe and then exchanges heat with the multiple sets of heat conducting plates, and heat is transmitted to runners of the chimney and the movable cylinder and runners of the movable cylinder and the fixed cylinder through the heat conducting plates to heat combustion air introduced into the runners of the fixed cylinder and the movable cylinder through the air inlet pipe. The boiler feed water is introduced into a movable barrel and a smoke barrel flow channel through a water inlet pipe, contact between smoke and the plate face can be enhanced through rotation of a heat conduction plate, the heat transfer area is increased, the waste heat recovery efficiency is improved, and heat loss is reduced; meanwhile, the air flow channel is arranged on the outer side of the water flow channel, heat dissipated in the water flow heating process can be reutilized, and the waste heat utilization efficiency and the recovery effect are further improved.

The utility model relates to the technical field of boilers, in particular to a low-nitrogen gas steam boiler which comprises a boiler body, two groups of water pipes are arranged in the boiler body and include an ascending pipe and a descending pipe, the descending pipe is located on the periphery of the ascending pipe, a gas distributor is arranged on one side of the ascending pipe, and a burner is installed on the side, facing the ascending pipe, of the gas distributor. A preheater is arranged on the outer side of the furnace body, one side of the furnace body is connected with a flue, a smoke pipe is vertically installed in the middle of the interior of the preheater, the top end of the smoke pipe is connected with the flue, and the bottom end of the smoke pipe is connected with a chimney. According to the low-nitrogen gas-steam boiler, the boiler body and the combustor are integrally designed, so that complicated structures such as a return smoke tube and a reversal chamber in a traditional boiler are omitted, the overall size of the boiler is greatly reduced, the weight is reduced accordingly, and the boiler is convenient to install and transport.

This invention discloses a boiler load adaptive regulation system based on solid thermal storage, relating to the field of power plant boiler combustion technology. The invention includes a boiler with an economizer arranged in its tail flue, and a flue gas extraction pipe connecting the boiler and the economizer. The end of the flue gas extraction pipe is connected to an ash separation component, the outlet of which is connected to the flue gas inlet of a solid thermal storage component, and the flue gas outlet of the solid thermal storage component is connected to the air preheater inlet. This invention extracts high- and medium-temperature flue gas from different locations in the boiler during rapid load reduction, stores the heat from the high-temperature flue gas using solid thermal storage technology, and releases the heat from the solid thermal storage component when rapid load increase is needed. This heat is then used to increase the primary air temperature and pulverized coal temperature through a heat exchanger, enhancing the combustion intensity of pulverized coal in the furnace. By reducing the amount of high-temperature flue gas in the boiler, the load change rate of the unit is effectively improved.

The application discloses a generator set shared peak regulation system and a working method thereof. The system comprises a steam generator, a steam power generation device, a heat recovery device, a generator, an energy storage switch, a water taking shutoff valve, a backwater regulating valve, a molten salt cold tank, a cold molten salt pump, a molten salt electric heater, a hot molten salt tank, a hot molten salt pump, a feedwater heater inlet shutoff valve, a feedwater heater, a feedwater heater outlet shutoff valve, a heat network water heater inlet shutoff valve, a heat network water heater, a heat network water heater outlet regulating valve and a heat network water taking shutoff valve. The application realizes the peak regulation of two or more generators by one peak regulation system, is a shared energy storage system, uses a heat storage medium such as molten salt to realize large-capacity, long-time and high-quality energy storage, realizes the deep peak regulation of the unit, and the heat energy has diversified uses. The application can realize the flexible transformation of the whole plant through single investment, and has high equipment utilization.

The application provides a coupling system and a control method for improving the variable load rate of a secondary reheat unit integrated with a medium-temperature energy storage, wherein the medium-temperature energy storage system is connected with the high-pressure cylinder outlet through a high-pressure cylinder outlet steam extraction valve during the energy storage process, is connected with the deaerator outlet through a pressure relief valve, is connected with the feed water pump outlet through a deaerator outlet regulating valve during the energy release process, and is connected with the boiler feed water inlet through a pipeline, so as to form a secondary reheat unit integrated with the medium-temperature energy storage; and a load splitting method is provided, which splits the whole unit load instruction into a medium-temperature energy storage system load instruction and a secondary reheat unit boiler coordination system load instruction, and the medium-temperature energy storage system load instruction is realized through high-pressure cylinder exhaust valve opening degree control and deaerator outlet regulating valve opening degree control in the load decreasing and increasing processes; through the coupling system and the load splitting method, the time-space transfer of the unit energy in the variable load process is realized, the variable load rate of the secondary reheat unit is improved, and the flexibility of the unit is enhanced.

The invention belongs to the field of energy conservation and consumption reduction of a gas boiler heat supply gas turbine power plant. The current gas-fired boiler adopts thermal deoxidization to control water supply and oxygen dissolution, water is supplied to a deaerator from an outlet of a secondary energy saver, the smoke exhaust temperature is about 60 DEG C, and waste heat is not fully utilized. Therefore, a novel pipeline system is constructed, a traditional heat exchange process is subverted, and exhaust smoke waste heat is utilized to the maximum extent through multiple heat exchange. The system comprises two sets of schemes adaptive to different operation states, and the schemes can be flexibly switched. When the gas-fired boiler runs, water supplied from an outlet of the secondary energy saver is led to the double-tube heat exchanger of the pressure regulating station, and returns to the primary energy saver after heat exchange to replace a water bath furnace to heat natural gas, so that the heating effect is guaranteed, gas is saved, and the water temperature of an inlet of the primary energy saver is reduced. When the gas turbine runs, one path of feed water is led to the double-tube heat exchanger from the low-pressure feed water secondary heater, and the feed water returns to the condenser after heat exchange, so that the gas consumption of the water bath furnace in low-temperature climate is saved, and more smoke exhaust waste heat is utilized in other climate. The two modes both can reduce the exhaust gas temperature, and are efficient in utilization, energy-saving, emission-reducing, green and environment-friendly.

This invention provides a boiler system that can effectively utilize the heat contained in ammonia decomposition gas. Furthermore, it provides a boiler system that can maintain the temperature of the ammonia decomposition gas at the boiler inlet within a predetermined temperature range. [Solution] The boiler system comprises an ammonia decomposition device that decomposes ammonia to produce ammonia decomposition gas containing hydrogen and nitrogen, a boiler that burns the ammonia decomposition gas as fuel, an ammonia decomposition gas supply line that supplies the ammonia decomposition gas from the ammonia decomposition device to the boiler, a feedwater line that supplies feedwater to the boiler, and a heat exchanger that heats the feedwater by exchanging heat between the ammonia decomposition gas and the feedwater.

The invention discloses a coal-fired unit deep peak shaving system coupled with electric heating high-temperature phase change heat storage, and relates to the technical field of power generation. The matching capacity of the heat storage system and the full-working-condition operation parameters of the high-parameter coal-fired unit can be effectively enhanced, so that the deep peak regulation capacity and the variable load rate of the coal-fired unit are improved, meanwhile, the energy density, the electricity-heat conversion efficiency and the economic benefits of the heat storage device are improved, and the unit can be prevented from running in an over-low load mode so as to improve the efficiency and prolong the service life. The coal-fired unit deep peak shaving system comprises a coal-fired unit and a high-temperature phase change heat storage system. According to the invention, the peak regulation flexibility of the coal-fired unit is improved, the energy density, the electricity-heat conversion efficiency and the economic recovery period of the heat storage device are also improved, and the over-low load operation of the unit can be prevented so as to improve the efficiency and the service life.