504results about "Steam use" patented technology

The invention relates to the technical field of coalification black water treatment, and particularly discloses a coal gasification black water flash steam waste heat steam turbine gradient utilization system which comprises a black water flash steam turbine module and a steam exhaust condensation module. The black water flash steam turbine module comprises a high-pressure flash evaporator, a low-pressure flash evaporator, a vacuum flash evaporator, a supplementary condensing steam turbine, a generator and a settling tank, and a water outlet of the vacuum flash evaporator is connected with the settling tank; the steam exhaust condensation module comprises an evaporative condenser and a condensate pump. Through the design of the scale scraping and water uniformizing piece, part of cooling water falling around the heat exchange coil from top to bottom falls on the water uniformizing plate to drive the water uniformizing plate to rotate, when the water uniformizing plate rotates, water on the water uniformizing plate is thrown out under the action of centrifugal force, cooling water without heat exchange can be uniformized to other heat exchange pipes for heat exchange, and the heat exchange efficiency is improved. Therefore, the cooling water flows more uniformly among the heat exchange coils, the utilization rate of the cooling water is improved, and the heat exchange efficiency is improved.

The embodiment of the invention provides a thermal power plant waste heat gradient utilization management method and system, belongs to the field of energy and power engineering, and aims at solving the problems that in the prior art, waste heat gradient matching is unreasonable, the low-temperature waste heat recovery efficiency is low, and the system integration degree is insufficient. The method comprises the following steps: constructing a multi-physics field coupling digital twinborn model and performing real-time correction; establishing a dynamic matching matrix of the residual heat source and the heat consumption load based on balance analysis; solving a Pareto optimal operation scheme through a multi-objective optimization model; and generating and issuing a cooperative control instruction. The system comprises a panoramic data sensing module, a digital twin modeling module, a balance and optimization decision module and a cooperative control instruction generation module. Through global optimization and dynamic regulation and control, the waste heat utilization efficiency, the economical efficiency and the equipment reliability are remarkably improved.

The embodiment of the invention discloses a peak regulation method, device and equipment for a cogeneration unit and a storage medium, and relates to the technical field of electric power, and the method comprises the steps: determining the heat user demand heat of a preset region in a current unit time length based on the heat supply scene information of heat users in the preset region and a predicted outdoor temperature sequence of the preset region in the current unit time length, based on heat supply network heat supply steam information extracted from the combined heat and power generation unit by a heat supply network heat supply system in the preset area in the current unit time, heat source heat supply heat of the preset area in the current unit time is determined; the supply and demand deviation is determined according to the heat user demand heat and the heat source heat supply heat, and when the supply and demand deviation is larger than a set deviation threshold value, a heat storage adjusting valve is opened to start a heat storage mode of the heat supply network heat supply system, and when the heat user demand heat is larger than the heat source heat supply heat, heat stored by the heat supply network heat supply system in the heat storage mode is used for heat supply. And the peak regulation flexibility of the cogeneration unit is improved in a peak load shifting manner.

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 invention discloses a deep peak regulation and frequency modulation heat energy storage system and method coupled with a coal-fired unit, and belongs to the technical field of coal-fired unit flexible transformation and power grid regulation. Aiming at the problems that a single fused salt / solid heat storage occupies a large area, the initial investment is high, a steam generation system is complicated, and a conventional coal-fired unit is difficult to meet the requirements that the minimum power generation output of a new generation coal-electricity pilot demonstration unit is less than or equal to 20% Pe, and deep peak regulation is realized to give consideration to primary frequency modulation performance through self or auxiliary regulation as much as possible in the specification of power generation and transformation energy (2025) 363. The system comprises a heat energy storage unit and a coal-fired unit, the heat energy storage unit comprises a demineralized water supply water tank, an electrode steam boiler, a spherical tank and a heat storage type steam temperature increasing device, and the structure of spherical tank flash evaporation steam supply and heat storage temperature increasing sensible heat supplementing is adopted to be matched with steam supplementing of a steam turbine. The combined minimum power generation output of the two can be reduced to 10% Pe, the peak increase output is at least 5.6% Pe, primary frequency modulation is assisted by increasing and decreasing the power consumption of the electrode steam boiler, and new energy consumption is assisted.

The invention belongs to the technical field of comprehensive energy utilization, and relates to a multi-energy cogeneration carbon dioxide power cycle system and a method thereof. The multi-energy cogeneration carbon dioxide power cycle system comprises a gas storage bin, a first compressor, a first cooler, a liquid storage tank, a first turbine, a rear preheater, a hot water supply unit, a waste heat recovery unit and a cold energy recovery unit. The hot water supply unit supplies hot water to absorb heat generated by multi-stage compression of carbon dioxide to obtain steam, so that the steam is supplied to a user, and the waste heat recovery unit and the hot water supply unit are matched to absorb and store the waste heat of the system to heat the carbon dioxide after expansion acting. And then the cold energy recovery unit is used for recovering the cold energy in the carbon dioxide subjected to expansion acting so as to supply cold water to a user or make ice, so that the waste heat and the cold energy in the power circulation process can be recovered, steam and the cold energy including electric energy are output, the energy consumption of the system is reduced, and the energy utilization efficiency of the system is also improved.

The invention relates to a heat pump device that makes it possible to utilize waste heat from technical processes or from the environment to simultaneously generate useful steam (12) and useful heat. The heat pump device comprises a heat pump module (1), a low-pressure steam generator (2) for generating low-pressure steam (11), a steam jet compressor (3) for generating useful steam (12) from high-pressure steam (10) and the low-pressure steam (11), and a first heat exchanger (4) for providing the useful heat. The heat pump device is suitable for applications where there is a simultaneous demand for both steam and heat.

The invention provides a dynamic peak regulation method of a thermal power plant using high-temperature heat energy storage, and belongs to the technical field of dynamic peak regulation of thermal power plants. The current heat storage capacity and the residual heat storage capacity of a heat storage tank are calculated through an intelligent peak regulation decision maker, the optimal steam extraction proportion and the heat storage release strategy are determined based on a dynamic peak regulation game model, and intermediate-stage steam of a steam turbine is extracted to the heat storage tank for heat storage according to the optimal steam extraction proportion in the power grid load valley period. The heat storage tank heat release system is started in the peak load period of the power grid to increase the power generation power to achieve power compensation, the optimal steam extraction proportion is adjusted in real time through an intelligent peak regulation decision maker, and a heat storage efficiency monitoring system is established to monitor the operation state of the heat storage tank in real time and optimize operation parameters. The technical problem that the optimal steam extraction proportion cannot be determined in real time is solved.

The invention discloses a compressed carbon dioxide energy storage system based on phase change heat storage and regenerative coupling and a deep peak regulation method, relates to the technical field of energy storage, and constructs a three-stage cascade heating chain. The compressed carbon dioxide energy storage system comprises a compressor unit, a high-pressure tank, a low-pressure tank, a regeneration heater, a PCM packed bed and a turbine generator unit. An outlet of the low-pressure tank is connected with an inlet of a working medium channel in the regeneration heater through the compressor unit and the high-pressure tank, an outlet of the working medium channel in the regeneration heater is connected with an inlet of a working medium channel in the PCM packed bed, and an outlet of the working medium channel in the PCM packed bed is connected with an inlet of a heat source channel in the regeneration heater through the turbine generator set. An outlet of a heat source channel in the regeneration heater is connected with an inlet of the low-pressure tank through the first air cooler. According to the method, the output power, the energy storage density and the peak regulation response speed of the system are remarkably improved, and an efficient deep peak regulation solution is provided for renewable energy source grid connection.

Provided is a control method with which, in a plant combining a GTCC and a CO2 recovery device, it is possible to supply sufficient steam to the CO2 recovery device even during start-up of the GTCC. Specifically provided is a steam supply system for supplying steam generated in a heat recovery steam generator to a CO2 recovery device that recovers CO2 from exhaust gas discharged by a power generation plant, which includes a gas turbine, the heat recovery steam generator, and a steam turbine, wherein medium-pressure steam generated in the heat recovery steam generator is supplied to the CO2 recovery device during start-up of the power generation plant.

The invention provides a self-adaptive adjustment method and system for steam exhaust of a steam turbine, and belongs to the technical field of steam exhaust of steam turbines. The self-adaptive adjustment method comprises the following steps: acquiring multi-dimensional data based on a sensor deployed on a steam turbine, and preprocessing the multi-dimensional data to generate a preprocessed data packet; performing feature vector extraction and weighted fusion according to the preprocessed data packet, and determining an operation mode identifier of the steam exhaust system of the steam turbine in combination with a preset state evaluation rule base; generating a hierarchical cooperative control strategy based on the identified operation mode identifier and the weighted fusion feature vector, dynamically adjusting the priority and the activation state of the hierarchical cooperative control strategy, and generating a comprehensive control instruction packet; and executing the comprehensive control instruction packet by using a multi-stage actuator, and performing execution confirmation and feedback. The purposes that the waste heat recovery amount is increased, the system back pressure fluctuation is reduced, the service life of water treatment resin is prolonged, the manual intervention frequency is reduced, and the operation and maintenance efficiency is improved are achieved.

The invention relates to the technical field of heating, in particular to a heating system based on waste heat recovery of a generator set, which comprises a waste heat collection unit comprising a plate heat exchanger and a cooling tower which are connected in parallel on a condenser circulating pipeline of the generator set, and a switching valve group is arranged between the plate heat exchanger and the cooling tower; the underground energy storage unit comprises a first mining and recharging well and a second mining and recharging well which are connected with the plate heat exchanger through a heat exchange pipeline, and the bottoms of the first mining and recharging well and the second mining and recharging well are thermally coupled through a high-heat-conduction filling layer; the heat pump unit comprises a lithium bromide absorption heat pump, and a low-temperature heat source inlet of the lithium bromide absorption heat pump is connected with an outlet of the plate heat exchanger and a water pumping pipeline of the first mining and recharging well in parallel. Compared with the prior art, the system has the advantages that the underground energy storage unit and the switching valve group are arranged to operate cooperatively and work cooperatively, heat supply safety is guaranteed, meanwhile, overground and underground integrated waste heat regulation, storage, release and control are achieved, and the stability, the regulation capacity and the energy comprehensive utilization efficiency of the system are improved.

The invention relates to the technical field of ship ammonia fuel power systems, in particular to an ammonia fuel waste heat and Kalina cycle coupling utilization system which comprises an ammonia fuel supply system and a Kalina cycle system, the ammonia fuel supply system comprises a fuel tank and an engine, and low-temperature ammonia fuel in the fuel tank is conveyed to the engine through a supply pipe to do work; the Kalina circulating system comprises a separator, a steam turbine and a generator, ammonia gas in the ammonia fuel supply system is mixed with exhaust gas through an ammonia gas pipe to form an ammonia water solution, and the ammonia water solution sequentially flows through a second heat exchanger and a third heat exchanger through a pipeline and then enters the separator; ammonia steam is separated from the separator to drive the steam turbine to do work and generate electricity through the generator, and exhaust gas generated after the steam turbine does work is mixed with ammonia gas in the ammonia fuel supply system; high-temperature smoke generated after the engine does work is exhausted after heat exchange through the third heat exchanger through the smoke exhaust pipe, and surplus fuel after the engine does work is subjected to heat exchange through the second heat exchanger through the liquid return pipe and then flows back to the fuel tank.

The invention belongs to the technical field of thermal power generating unit steam supply, and particularly discloses a thermal power plant coupling steam ejector and multi-heat-source fused salt heat storage steam supply system which comprises a thermal power generating unit body, a fused salt heat storage system and a steam supply system. And main steam and flue gas are used as heat sources for combined heat storage, on one hand, the main steam after heat release is used for extracting steam to supply low-parameter industrial steam, on the other hand, fused salt is used for storing heat to generate steam to eject a steam turbine intermediate-pressure cylinder to exhaust steam, and therefore high-parameter industrial steam is supplied, and the energy consumption is reduced. And peak regulation and heat supply tasks of the thermal power plant are synchronously met. According to the system, the deep peak regulation and industrial steam supply capacity of the thermal power generating unit is greatly improved, different steam supply parameter requirements can be met by adjusting parameters of the fused salt heat storage system and the structure of the ejector, flexible regulation and control of industrial steam supply of the thermal power generating unit are achieved, and the problems of a thermal power plant in the aspects of heat storage, peak regulation and steam supply are solved.

The utility model relates to the technical field of waste heat utilization of centrifugal air compressors, in particular to a tar residue treatment system. The centrifugal air compressor is provided with N stages of compressors, N is larger than or equal to 2, and the N stages of compressors are connected with the N-1 efficient heat exchangers in series through pipelines. An outlet of the high-efficiency heat exchanger is connected with an inlet pipeline of the organic working medium-hot water heat exchanger, an outlet of the organic working medium-hot water heat exchanger is connected with an inlet pipeline of the high-efficiency heat exchanger to form a circulating water system, and the water replenishing pipeline is connected with the circulating water system; an outlet of the organic working medium-hot water heat exchanger is connected with an inlet pipeline of a working medium expansion machine, an outlet of the working medium expansion machine is connected with an inlet pipeline of a working medium condenser, and an outlet of the working medium condenser is connected with an inlet pipeline of the organic working medium-hot water heat exchanger to form an organic working medium circulating system; the working medium expander is connected with a generator pipeline. The waste heat of the centrifugal air compressor can be effectively utilized, and the current situation of insufficient power supply of a factory can be relieved.

The system comprises a power generation system and a heat supply system, the power generation system comprises a boiler, a carbon dioxide turbine, a heat regenerator, a precooler, a compressor and a motor generator, an outlet of the boiler is connected with an inlet of the turbine, an outlet of the turbine is connected with a hot side inlet of the heat regenerator, and an outlet of the compressor is connected with a hot side inlet of the precooler. An outlet of the precooler is connected with an inlet of the compressor, an outlet of the compressor is connected with a cold-side inlet of the heat regenerator, a cold-side outlet of the heat regenerator is connected with an inlet of the boiler, and the compressor and the turbine are respectively connected with the motor generator. The heat supply requirement can be met, complete thermoelectric decoupling is achieved, and the flexibility of the supercritical carbon dioxide cycle generator set is fully exerted while stable heat supply is achieved.

The invention belongs to the technical field of clean energy power generation and energy storage, and particularly relates to a multi-coupling liquid metal thermoelectric conversion system. The system comprises a liquid metal reactor module, a photo-thermal system module, a liquid metal energy storage module and an energy conversion module, the liquid metal reactor module is a core base load energy source of the system; the photo-thermal system module is used as peak regulation and supplementary energy; the liquid metal energy storage module serves as a shared energy storage unit of the nuclear energy and photo-thermal system. The problems that nuclear energy peak regulation flexibility is poor, photo-thermal power generation is intermittent, and a traditional molten salt system is limited in high-temperature performance and slow in response can be solved.

The utility model discloses a power plant waste heat comprehensive utilization system, and relates to the technical field of energy conservation and environmental protection. According to the technical key points, the system comprises a warm air blower connected with an indirect air cooling system, and the warm air blower is installed on the inlet side of a first induced draft fan; an air outlet of the first induced draft fan is connected with one end of the air side of the air preheater, and the other end of the air side of the air preheater is connected with the boiler; one end of the smoke side of the air preheater is connected with a flue at the tail of the boiler, and the other end of the smoke side of the air preheater is connected with an air inlet of the low-pressure economizer; a gas outlet of the low-pressure economizer is connected with the tail gas treatment module. According to the scheme, the exhaust steam waste heat of the steam turbine and the exhaust smoke waste heat of the boiler are comprehensively utilized at the same time, so that the two parts of waste heat are utilized to the greatest extent, the coal consumption of a power plant is reduced, and meanwhile, the heat pollution to the environment can be reduced.

The present application relates to the technical field of energy utilization, and particularly to a combined heat and power generation system capable of efficiently and flexibly heating by means of dual-unit combined supply, comprising a high backpressure unit and a conventional unit, and further comprising a first-stage heating unit, a second-stage heating unit, a third-stage heating unit, and a fourth-stage heating unit. In the present application, four stages of different heating units are provided and are simultaneously communicated with a conventional backpressure unit and the high backpressure unit, and a low-pressure cylinder crossover pipe heating mode and a low-pressure cylinder zero-output heating mode are flexibly selected on the basis of the total steam consumption demand of the third-stage and fourth-stage heater in combination with the real-time electric load condition of the conventional backpressure unit, so that the heating load of the units can be adjusted more flexibly; and when an electric load is determined, the external heating loads of the conventional and high backpressure units can fluctuate between -50% and +50%, and a high thermal-electric decoupling capability is realized.

The application discloses an energy-saving system suitable for coupling LNG cold energy power generation and ORC power generation, and belongs to the fields of ship engineering and energy saving. The LNG cold energy power generation system comprises an LNG storage tank (1), an LNG pump (11), an LNG evaporator (10), an LNG turbine generator (9), an NG reheater (7), a gas supply buffer tank (12) and the like. The application utilizes both LNG cold energy power generation and flue gas waste heat organic Rankine cycle (ORC) power generation, and the two are combined with each other. The cold energy released by LNG gasification is used for organic medium condensation, and the heat of the ORC evaporator comes from flue gas waste heat or cylinder jacket water. After LNG power generation, the LNG is reheated to a proper temperature to supply gas to the main engine, and the cold energy in the reheating process is used for organic medium condensation. The organic medium condensation process is completed in two condensers. A gas-liquid separator is arranged between the two condensers to reduce two-phase flow in the system and inhibit the negative influence of the sloshing working condition on the system during ship sailing.

The invention discloses a steam utilization method and related equipment, and relates to the technical field of coking production, and the method comprises the following steps: carrying out sensible heat recovery on raw coke oven gas discharged by a coke oven riser in a target coking plant area to obtain a first steam source; steam extraction is conducted from a dry quenching power generation turbine in the target coking plant area, and a second steam source is obtained; acquiring steam demand parameters of a plurality of process units in the target coking plant; based on the steam demand parameters, the first steam source and the second steam source are distributed for use by the plurality of process units. According to the method, a high-pressure steam pressure reduction mode is replaced by raw gas sensible heat recovery steam and steam turbine medium-pressure extraction steam, flexible distribution is combined with process requirements, steam cascade efficient utilization and self-sufficient balance in a plant area are achieved, energy consumption and cost are reduced, stable production is guaranteed, and meanwhile energy-saving and environment-friendly benefits are achieved.

According to the energy utilization system based on steam gradient utilization and waste heat recovery, one part of steam generated by a steam generation device flows into a first user port, and the other part of the steam flows into a first ejector through a working fluid inlet of the first ejector; condensed water generated by the steam in the pipeline enters the flash evaporator; an outlet of the first user port is connected with a working fluid inlet of the first ejector, a flash gas outlet is connected with a driving fluid inlet of the first ejector, and an outlet of the first ejector is connected with the second user port; and the flash liquid outlet is connected with a driving fluid inlet of the first ejector, an outlet of the first ejector is connected with the hydraulic turbine, and an outlet of the hydraulic turbine is connected with the third user port. Therefore, different users can use the flash evaporation system through different ports according to requirements, step-by-step release and utilization of energy are achieved, in addition, the system can utilize waste heat of flash evaporation steam which is emptied originally, and the energy utilization rate of the system is improved.

The invention provides a thermodynamic cycle system applied to a steam turbine. The thermodynamic cycle system comprises a boiler, the steam turbine and a vortex tube. The boiler generates steam with first temperature; the steam turbine discharges a first path of steam with second temperature to the vortex tube, a second path of steam with second temperature is discharged to the liquid inlet of the boiler, the vortex tube separates the first path of steam into hot steam with third temperature and cold steam with fourth temperature, and the hot steam with third temperature is recycled to the steam turbine; the steam turbine drives mechanical equipment through hot steam with the third temperature, cold steam with the fourth temperature is discharged to the liquid inlet of the boiler, the third temperature is higher than the second temperature, and the fourth temperature is lower than the second temperature; wherein the cold steam with the fourth temperature cools the second path of steam to generate cooling liquid, the cooling liquid enters the boiler from a liquid inlet of the boiler, the steam with the first temperature is generated after heating, a vacuum water ring pump and a condenser are omitted, and energy is saved.

The present application relates to a kind of flexible energy supply system of steam turbine based on cascade utilization and its operating method, wherein the system includes air-cooled atmospheric condenser, high back pressure condenser, primary peak heater, secondary peak heater, cascade utilization back pressure machine, molten salt heat storage system, steam compressor, steam turbine and drainage system;The air-cooled atmospheric condenser, high back pressure condenser, primary peak heater, secondary peak heater are sequentially connected to constitute four-stage heating energy supply system;The inlet of the air-cooled atmospheric condenser is connected with heating return water pipeline, and the outlet of the secondary peak heater is connected with heating steam supply pipeline.The present application clearly divides heating steam turbine unit into four cascade utilization energy supply systems, can dynamically adjust cascade heating mode according to the demand of heat user and the demand of unit deep peak regulation, relieve the problem of energy crisis caused by deep peak regulation, and improve the ability of unit livelihood heating and industrial steam supply guarantee.

The invention discloses an alcohol amine method purified natural gas coupling differential pressure power generation cold energy utilization system which comprises an amine liquid natural gas heat exchanger, an acid gas natural gas heat exchanger and a natural gas expansion machine. An amine liquid heating medium channel of the amine liquid natural gas heat exchanger is connected into a lean amine liquid pipeline of an alcohol amine method natural gas purification system, and an amine liquid heating medium channel inlet is connected with a high-pressure natural gas pipeline; an acid gas heating medium channel of the acid gas and natural gas heat exchanger is connected into an acid gas pipeline of the alcohol amine method natural gas purification system, and an acid gas cooling medium channel inlet of the acid gas and natural gas heat exchanger is connected with an amine liquid cooling medium channel outlet of the amine liquid and natural gas heat exchanger. A gas inlet of the natural gas expansion machine is connected with an acid gas refrigerant channel outlet of the acid gas natural gas heat exchanger, and a gas outlet of the natural gas expansion machine is connected with a follow-up process system pipeline. Existing resources can be fully utilized, extra investment is remarkably reduced, parameters of the expanded natural gas are accurately controlled, it is ensured that the expanded natural gas meets the follow-up process requirements, the system energy efficiency is overall improved, and the operation cost is reduced.

The embodiment of the invention provides a system, method and device for improving heat supply energy of a steam turbine, and the system comprises a heat supply steam extraction pipeline with the inlet end connected to a medium-low pressure communicating pipe and the outlet end connected to an external heat supply network; the hydraulic control butterfly valve is arranged on the medium-low pressure communicating pipe, is positioned at the downstream of the inlet of the heat supply steam extraction pipeline, and is used for cutting off or conducting steam flowing to the low-pressure cylinder; the inlet end of the cooling steam bypass is connected to the medium-low pressure communicating pipe and located on the upstream of the hydraulic control butterfly valve, and the outlet end of the cooling steam bypass is connected to a steam inlet of the low-pressure cylinder and used for introducing cooling steam into the low-pressure cylinder when the hydraulic control butterfly valve is cut off; the Roots-water ring vacuum pump set is connected to a steam exhaust port of the low-pressure cylinder and used for establishing and maintaining a high-vacuum environment of the low-pressure cylinder; and the drainage unit is connected to the low point of the heat supply and steam extraction pipeline and used for discharging condensed water in the heat supply and steam extraction pipeline. The heat supply and steam extraction capacity of the unit is remarkably improved, and meanwhile safe cooling of the low-pressure cylinder and reliable operation of the system are guaranteed.

The invention discloses a coal-fired unit power generation system with peak shaving capacity and a peak shaving method, and belongs to the technical field of thermal power generation. The system comprises a coal-fired power generation subsystem, a fused salt heat storage subsystem and a primary air heating subsystem; the coal-fired power generation subsystem comprises a boiler and a steam turbine generator set; the fused salt heat storage subsystem comprises a fused salt steam heat exchanger, a high-temperature fused salt tank, a low-temperature fused salt tank and a fused salt water supply heat exchanger; the primary air heating subsystem comprises a steam air heat exchanger. The peak shaving method comprises the steps that when the coal-fired unit power generation system operates at a low load or reduces the load, main steam exchanges heat with low-temperature fused salt, and part of heat is stored; steam at an outlet of the fused salt steam heat exchanger exchanges heat through the steam-air heat exchanger to reheat primary hot air of the boiler; when the load of the coal-fired unit power generation system rises, heat is released, and feed water is heated through the fused salt feed water heat exchanger. The peak regulation depth of the unit is greatly increased by extracting steam and storing heat and increasing the primary air temperature, and the output and combustion state of the low-load coal mill is improved.

A heat utilization system includes: a heat recovery device configured to generate first steam and second steam with a lower pressure than the first steam from water by heat exchange between a heating fluid and the water; a discharge source which discharges the heating fluid; a first steam turbine driven by the first steam; a pressure reduction part configured to reduce pressure of exhaust steam which is steam that has driven the first steam turbine; a heat demand facility which utilizes heat of at least one of at least part of the exhaust steam or the second steam; an exhaust steam line connecting the first steam turbine and the heat demand facility; and a second steam line through which the second steam flows out of the heat recovery device. The second steam line is connected to the exhaust steam line at a position downstream of the pressure reduction part.

The invention relates to the technical field of turbine low-pressure cylinder equipment, in particular to a turbine low-pressure cylinder micro-output heat supply system which comprises a cylinder body, the inner wall of the cylinder body is rotationally connected with a rotor, the bottom of the cylinder body is fixedly connected with an air inlet pipe connected with a steam generator, and the top of the cylinder body is fixedly connected with an air outlet pipe. After entering the condensation bin, steam collides with the filter cartridge, penetrates through the filter cartridge to be in contact with the condensation pipe, is condensed into water drops on the outer wall of the condensation pipe and falls into the condensation bin under the action of gravity, condensate water is gathered into the water storage bin under the action of gravity, and due to the fact that the high-temperature steam continuously flows into the condensation bin to heat the condensate water, the condensate water can be condensed into the water storage bin. Condensate water is stirred by the rotating stirring plate in the water storage bin, water liquid entering the water storage bin through the connecting pipe is fully mixed with the condensate water, the condensate water is prevented from being heated and evaporated again, meanwhile, the filter cartridge can prevent steam from directly impacting the condensation pipe, and therefore the service life of the condensation pipe is prolonged.

The invention relates to the technical field of intelligent management of power generation enterprises, in particular to an on-line cooperative heat supply control system and method of a cooperative network system.The cooperative network system is composed of a plurality of heat supply units and comprises a collecting part, a data processing part and a data processing part, heat supply data and environment temperature change data of each unit and power grid load change data of the collaborative network system are collected; and the control part is used for identifying the actual state of each unit based on the heat supply data, the environment temperature change data and the power grid load change data, forming an optimal combination scheme under various heat supply modes and peak regulation modes, generating an online cooperative heat supply control instruction and controlling each unit to work. Therefore, the problems that in the related technology, a peak regulation means only focuses on deep peak regulation, the unit tip peak capacity is weakened, an online cooperation scheme is lacked after multi-mode transformation, then the deep peak regulation and the high rated load output capacity need to be considered in flexible transformation of the heat supply unit, and it is difficult for a power generation enterprise to achieve economic benefit maximization through cooperation are solved.