224 results about "Steam system" patented technology

The invention provides a PLC-based biomass gasification industrial steam full-automatic intelligent control system and method. The system comprises a data acquisition module, a modeling identification module, a multi-objective optimization module, a rolling prediction control module, a coordination execution module, a self-adaptive correction module and an abnormal fault tolerance and safety control module. The system collects operation data of a feeding system, a gasification furnace, a boiler, a steam-water system and an environmental protection system in real time through a PLC platform, a dynamic coupling model of a combustion side, a steam-water side and an environmental protection side is established, and a multi-target constraint optimization model with stable steam pressure, up-to-standard emission and minimum energy consumption as targets is constructed. According to the invention, unattended operation of the biomass gasification industrial steam system is realized, the system has the advantages of high control precision, low energy consumption, stable emission and strong fault-tolerant capability, and the intelligence and safety of the industrial steam system are obviously improved.

A gas turbine engine includes a fan, a combustor positioned in a core air flowpath that generates combustion gases, a steam system that extracts water from the combustion gases and generates steam, and a gearbox assembly. The steam system includes water storage devices that store the water therein. The water storage devices include a first state in which a level of the water increases or is maintained and a second state in which the level of the water decreases as the water flows through the water storage devices. The gearbox assembly includes a gearbox and a gutter for collecting a gearbox lubricant scavenge flow from the gearbox. The gutter is characterized by a lubricant extraction volume ratio between 0.01 and 0.3, inclusive of the endpoints. The lubricant extraction volume ratio defined by:VGVG⁢B·VGis a gutter volume of the gutter and VGB is a gearbox volume.

The utility model provides an intelligent automatic continuous steaming machine, which belongs to the technical field of food processing, and comprises a feeding module provided with a food material feeding end and an inlet end box body, a first gas collecting hood arranged on the inlet end box body, and a first heat exchanger arranged in the first gas collecting hood; the discharging module is provided with a food material discharging end and an outlet end box body, a second gas collecting hood is arranged on the outlet end box body, and a second heat exchanger is arranged in the second gas collecting hood; the steaming module comprises a steaming chamber, and a water supplementing system and a steam system are arranged in the steaming chamber; the conveying module comprises a conveying mesh belt used for bearing cooked food materials, the water outlet end of the water supplementing system is located above the conveying mesh belt, and the air outlet end of the steam system is located between the upper side and the lower side of the conveying mesh belt. Through the cooperation of the water supplementing system and the steam system, the taste of rice is improved.

The invention discloses a nuclear power plant steam generator secondary side state setting system and method. The system comprises an air compressor, a steam generator and a main steam system. The steam generator comprises a secondary side, a first hole site located in the lower portion of the secondary side, a second hole site located in the upper portion of the secondary side and a steam outlet located in the top of the secondary side. An inlet of the main steam system is connected with the steam outlet; the air compressor is connected with the first hole site; when the secondary side of the steam generator is dried, the air compressor is used for filling dry compressed gas through the first hole site, and the main steam system and the second hole site are used for exhausting. When the secondary side is dried, the boundary of the main steam system is contained in the drying pressure range, although the state setting of the main steam system is increased, the main steam system is located outside the steam generator, no irradiation dose exists, operation is convenient, and foreign matter cannot be introduced even if operation is not conducted in the steam generator. The main steam system and the second hole position exhaust jointly, so that the drying efficiency is greatly improved.

The invention discloses a pyrolysis gas-assisted thermochemical cycle hydrogen production test system and an operation method. The test system comprises a steam system, a gas path system, a reaction system and a separation detection system. The reaction system adopts a first reaction system and a second reaction system which are arranged in parallel and can alternately carry out reduction and oxidation reactions. And the gas path system can selectively introduce pyrolysis gas or nitrogen into the reaction system through valve switching. According to the operation method, by optimizing water vapor oxidation conditions, an air oxidation stage in a traditional process is omitted, and energy consumption is reduced; and nitrogen purging is adopted during switching of the reaction stages, so that the explosion risk is thoroughly eliminated, and the safety is guaranteed. According to the invention, continuous, efficient and safe circulating hydrogen production is realized, and a reliable scheme is provided for industrial application.

The invention discloses a UHT sterilization system driven by a heat pump steam system and a sterilization method of the UHT sterilization system, and relates to the technical field of UHT sterilization systems. The UHT sterilization system overcomes the technical defect that the utilization rate of heat energy of an existing UHT sterilization system is low. The UHT sterilization system comprises a boiler heating subsystem and a heat pump heating subsystem. The heat pump heating subsystem comprises a second preheating heat exchanger and a heat pump unit; a first electric three-way valve is arranged on the material pipe between the material bin and the first preheating heat exchanger, a fourth electric three-way valve is arranged between the first preheating heat exchanger and the ultra-high-temperature sterilizer, and a medium-temperature outlet of the second preheating heat exchanger is connected with the ultra-high-temperature sterilizer through the fourth electric three-way valve; a backwater outlet of the ultrahigh-temperature sterilizer is connected with a backwater inlet of the heat pump unit through a sixth electric three-way valve; a steam outlet of the heat pump unit is connected with a steam inlet of the ultrahigh-temperature sterilizer; waste heat in the material sterilization and cooling process is recycled through the heat pump, the utilization rate of heat energy in the system is increased, and engineering investment is saved.

The application discloses an air conditioner refrigeration and heat supply system based on a siphon principle and a running method thereof. The system comprises a refrigerant water system, a refrigerant steam system and a liquid level adjusting device for adjusting a refrigeration temperature. The refrigerant water system comprises a high-position water tank, a siphon starting pump, an evaporation container, a low-position water tank and a heat absorbing device for providing heat required by refrigerant evaporation. The running method comprises three processes of refrigerant water siphon decompression, heat absorbing evaporation and steam compression discharge. The application completely gets rid of the bondage of traditional "four refrigeration components", provides a simpler and more feasible structure form, and can be used as a cold water unit, a water source or air source heat pump and a cold and heat combined supply unit. The application has the characteristics of simple structure, low construction cost and one machine with multiple uses. Since water is used as the refrigerant, the application has the advantages of environmental friendliness, energy saving and emission reduction. Compared with a traditional steam compression cycle refrigeration method, the application has a wider refrigeration temperature range, a higher heat supply grade and a larger theoretical refrigeration coefficient.

The invention provides a high-temperature steam system and method based on waste heat recovery and vinasse recycling, belongs to the technical field of steam systems, and can solve the problems that when an existing steam system is applied to the brewing industry, a large amount of primary energy needs to be consumed, and brewing by-products are not sufficiently utilized. According to the technical scheme, the waste heat recovery assembly comprises a heat exchanger, a high-temperature heat pump unit, a heat storage tank, a high-temperature steam heat pump unit and a condensate water tank; the vinasse recycling assembly comprises a biogas steam boiler, a double-membrane gas holder and an anaerobic bioreactor. According to the system, industrial by-products of a brewing factory can be comprehensively recycled, high-temperature steam required by a boiling process of the brewing factory is provided while secondary steam generated by a boiling pot, low-grade waste heat of the factory and brewing waste are recycled, and the energy utilization efficiency of the system is improved; a novel high-efficiency, low-carbon and energy-saving high-temperature steam system is provided for a brewing factory.

The utility model belongs to the technical field of steam ovens, and particularly relates to a self-cleaning oven which comprises an oven body, a steam system, a lighting system, a heating pipe system and a control system. The steam system comprises a boiler device which is installed on the rear side of the inner container and used for converting water into steam and providing the steam into the inner container to heat food; the boiler device comprises an air inlet pipe leading to the interior of the inner container, an air inlet pipe installation hole is formed in the inner container, the air inlet pipe is arranged in the air inlet pipe installation hole in a penetrating mode, a connecting piece is arranged at the end of the air inlet pipe, and an air inlet pipe sealing piece is arranged between the connecting piece and the side wall of the inner container and made of high-temperature-resistant materials. The connecting piece and the inner container are connected through the air inlet pipe fixing piece, so that the connecting piece enables the air inlet pipe sealing piece to abut against the inner container located on the edge of the air inlet pipe installation hole, the gap between the air inlet pipe and the inner container is sealed, air leakage of the inner container is avoided, the stability of the inner container during working is guaranteed, and normal operation of the steaming oven is guaranteed.

The embodiment of the invention provides a coupled double-tank active solar photo-thermal boiler complementary five-stage steam supply system. The coupled double-tank active solar photo-thermal boiler complementary five-stage steam supply system comprises a coal-fired power generation unit and a water supply regenerative system, wherein the coal-fired power generation unit comprises a boiler, a steam turbine high-pressure cylinder, a reheater, a steam turbine intermediate-pressure cylinder and a steam turbine low-pressure cylinder which are connected in sequence; the tower type solar photo-thermal system comprises a low-temperature molten salt tank, a solar heat collection tower and a high-temperature molten salt tank which are connected through a molten salt pump and a pipeline; an outlet of the high-temperature molten salt tank is sequentially connected with hot-side molten salt inlets of the main heat exchanger and the second-stage heat exchanger through a molten salt pump, and a cold-side molten salt outlet of the second-stage heat exchanger is connected to the low-temperature molten salt tank; a water supply inlet of the main heat exchanger is connected with a boiler water supply pipeline, and a steam outlet is connected to a boiler main steam system; a feed water inlet of the second-stage heat exchanger is connected with an outlet of a pressurizing water pump, an inlet of the pressurizing water pump is connected to a condensed water pipeline of an outlet of the deaerator, and a steam outlet of the second-stage heat exchanger is used for providing industrial steam supply of a first pressure grade.

The utility model discloses a kind of control systems of low-pressure steam recycling, it is related to low-pressure steam utilization technical field;Purpose is to utilize the surplus steam outside steel plant to carry out heat exchange to the condensate water in plant, and the following technical scheme is proposed: including low-pressure steam heat exchanger, the inlet end of low-pressure steam heat exchanger is connected with condensate water system in plant and low-pressure steam system outside plant respectively, and the outlet end of low-pressure steam heat exchanger is connected with deaerator and drain recovery system respectively;Low-pressure steam heat exchanger condensate water inlet end is equipped with inlet water side electric valve, low-pressure steam heat exchanger condensate water outlet end is equipped with outlet water side electric valve, and bypass electric valve, which is arranged in parallel with low-pressure steam heat exchanger, is also provided on condensate water pipeline;Control regulating valve and low-pressure steam inlet electric shut-off valve are arranged in series on steam pipeline outside plant.The utility model has the advantages of efficient heat exchange, heat recovery, steam quality optimization and utilization, water resource recycling, energy consumption reduction and the like.

The utility model provides a steam system of an autoclave, and belongs to the technical field of autoclaved aerated concrete manufacturing and heat energy recovery. The system comprises a frame erected on the ground of a finished product area, a boiler room, a waste heat recovery platform and a still kettle steam distribution platform are arranged on the frame, and the boiler room is connected with a still kettle through a steam supply pipeline of the still kettle steam distribution platform and used for supplying high-temperature steam to the still kettle; the waste heat recovery platform is connected with the still kettle through a recovery pipeline of the still kettle steam distribution platform and used for recovering steam and condensate water from the still kettle. According to the utility model, the occupied area of a factory area is reduced, and the overall energy utilization rate is greatly improved. Meanwhile, the still kettle steam distribution platform is arranged above the finished product area, so that the working environment of still kettle steam distribution personnel can be improved, and the safety risk is completely eradicated. In addition, the waste heat platform is arranged above the finished product area, waste steam and condensate waste heat of the still kettle can be recovered nearby, and the waste heat recovery efficiency is improved.

The application provides a method and system for predicting main steam parameters before steam warming of a combined cycle unit, the method comprising the following steps: obtaining historical operation data of a target power generating unit, the historical operation data comprising a plurality of observable input parameters and output parameters closely related to a main steam system; constructing an NARX neural network model, training the neural network model based on the historical operation data, and obtaining a trained main steam parameter prediction model; deploying the main steam parameter prediction model on a general computing device; obtaining initial state parameters under a current working condition before starting the power generating unit, and inputting the initial state parameters into the main steam parameter prediction model; and outputting a predicted trajectory of main steam key parameters before the high-pressure bypass system is put into operation from the main steam parameter prediction model.

The application relates to the technical field of energy consumption control, and discloses a circulating system energy consumption control method and system for a large laundry room and a storage medium. The method adopts an inverse Carnot cascade heat pump system to construct series-connected low-temperature and high-temperature circulating systems, the systems are connected through an intermediate heat storage water tank, and the tank supplies cold air for an air supply system, hot water for a hot water system and steam for a steam system. The water temperature of the heat storage water tank and the output temperature of the high-temperature system are acquired in real time, the temperature distance is calculated based on a temperature distance algorithm, and the cold quantity, the hot water quantity and the steam quantity are dynamically adjusted through a differential coefficient. The application realizes cascade energy circulation reuse of cold, hot water and steam, reduces low-grade waste heat emission and improves the comprehensive energy utilization efficiency.

The invention relates to the technical field of energy conservation of industrial steam systems, in particular to an exhaust natural convection condensation system of an open type condensation water recovery device. Comprising an air-cooling heat exchanger, a water collecting tank and a condensate pump, the water collecting tank is provided with a saturated condensed water inlet pipeline and a condensed water outlet pipeline; an inlet of the air cooling heat exchanger is communicated with the steam space of the water collecting tank and is used for receiving and condensing flash steam from the water collecting tank; the air cooling heat exchanger is provided with an exhaust port used for exhausting uncondensed gas to the atmosphere. And the condensate pump is connected to a condensate outlet pipeline of the water collecting tank. The advantages of simple structure, low cost, safety and reliability of an open system can be reserved, visual and noise pollution can be effectively eliminated, and the heat energy recovery efficiency is improved.

The invention discloses a temperature determination method and device, an air conditioner and a vehicle, and belongs to the technical field of air conditioners. The method is applied to the double-steaming system. The double-steaming system comprises a main loop, a first branch and a second branch. The main loop comprises a compressor and a condenser connected with the compressor, an air suction port of the compressor is provided with a low-pressure sensor, and an exhaust port of the compressor is provided with a high-pressure sensor; the first branch comprises an air conditioning box and a first temperature sensor; the second branch includes a battery heat exchanger and a second temperature sensor. In the working process of the double-steaming system, the superheat degree value and the exhaust temperature value of the air suction port of the compressor can be determined according to the pressure values of the low-pressure sensor and the high-pressure sensor and the temperature values of the first temperature sensor and the second temperature sensor, that is, a refrigerant temperature sensor does not need to be additionally arranged in a conventional double-steaming system; therefore, the refrigerant state of the air suction port and the air exhaust port of the compressor can be obtained, and the system cost is greatly reduced.

The application discloses a sludge drying system and drying process based on high-temperature heat pump steam technology, which comprises a partition type sludge drying device, a low-temperature side heat exchange device, a heat pump steam generator, a heat pump compressor, a throttling device and a circulating pipeline; further comprising a pressurized circulating pump, a wastewater treatment module and a waste gas treatment module. The drying process adopts high-temperature heat pump technology to absorb heat from a waste gas heat source above 100 DEG C, then heats the condensed water at 100 DEG C to generate high-temperature steam above 150 DEG C, realizes closed circulation of the steam heat source for sludge high-temperature drying, and simultaneously carries out organic phase liquefaction separation on the waste gas generated in the sludge drying process, thereby reducing the difficulty of waste gas treatment. The overall energy consumption is reduced by more than 60% compared with a municipal steam system, the process can be distributedly arranged, resources are saved, and the emission of pollutants in the sludge drying process is reduced, so that the process has high economic value and environmental protection value.

The invention provides a ship heat supply system which comprises a main heat source unit, a water consumption unit and a control unit, the main heat source unit comprises a first electric heating part, and the first electric heating part is used for heating a heat source medium in the main heat source unit; the water consumption unit at least comprises a daily water consumption part and an air conditioner water consumption part; the control unit is in control connection with the heat supply water segregator, and the different branch outlets are controlled to be opened and closed according to different heat supply requirements so that the heat source medium can enter a preset pipeline of the water consumption unit. According to the system, electric heating and intelligent control are adopted for air conditioning, heating and living daily hot water of the ship, sufficient electric power on the ship is effectively used as a heat source, complex steam system pipelines brought by a steam heat source are reduced, and more available space is provided for living and working areas. The risk of steam leakage can be avoided, the load change can be quickly responded through the control unit, and the energy loss is reduced. Therefore, the system has the advantages of safety, economy, adaptability and energy efficiency, and is beneficial to popularization and application.

The utility model relates to the flexible operation reconstruction technical field of thermal power generating unit, disclose a kind of industrial steam extraction and hot air coupling thermodynamic system under the condition of depth peak shaving of unit, including boiler, airflow ejector and industrial user or heat user, the inside of the boiler is provided with superheated steam system, the inside right side of the boiler is provided with reheat steam system, the inside right side middle part of the boiler is provided with economizer, the left and right sides of the boiler are all communicated with combustion air box.The utility model in the present application, by extracting high-quality parameter steam as ejector steam under low load, extract lower quality parameter steam as the ejector steam, mixed into the mixed steam of required parameter after airflow ejector;Effectively solve the problem that industrial steam extraction parameter is lower than user requirement index or high energy consumption after satisfying industrial steam extraction parameter by using main steam desuperheating and pressure reducing, improve industrial steam extraction capacity, and economic effect is obvious.

The invention belongs to the technical field of chemical looping gasification devices, and particularly relates to a chemical looping gasification device and a gasification reaction method. The device comprises a combustion furnace and a gasification reactor, a first fuel feeding device and an oxygen carrier feeding device are arranged on the combustion furnace, the bottom of the combustion furnace is connected with an air system through a pipeline, the top of the combustion furnace is connected with a first cyclone separator through a pipeline, and the top of the first cyclone separator is connected with a flue gas treatment device through a pipeline. An oxidation state oxygen carrier pipeline is connected between the bottom of the first cyclone separator and the gasification reactor; a second fuel feeding device is arranged on the gasification reactor, the bottom of the gasification reactor is connected with a steam system through a pipeline, the top of the gasification reactor is connected with a second cyclone separator through a pipeline, and the top of the second cyclone separator is connected with a gasification synthesis gas treatment device through a pipeline; a coke pipeline is connected between the bottom of the second cyclone separator and the gasification reactor; and a reduction state oxygen carrier pipeline is connected between the lower part of the gasification reactor and the combustion furnace. The invention provides a chemical chain gasification device and a gasification reaction method suitable for fuels such as biomass and lignite.

The utility model relates to a coal chemical industry gasified black water waste heat steam generating system which comprises a flash evaporation unit, a heat exchange unit, a heating medium water unit and a second-class absorption heat pump, the heat exchange unit is connected with the flash evaporation unit, the heating medium water unit is connected with the heat exchange unit, the second-class absorption heat pump is connected with the heating medium water unit, a water-water heat exchanger is arranged in the heat exchange unit, and the water-water heat exchanger is connected with the second-class absorption heat pump. High-temperature black water exchanges heat with low-temperature heat medium water in the water-water heat exchanger and then is cooled, the low-temperature heat medium water exchanges heat with the high-temperature black water in the water-water heat exchanger and is heated to become high-temperature heat medium water, and the high-temperature heat medium water is conveyed to the second-class absorption heat pump to be used for preparing high-grade steam. High-temperature heat medium water is returned to the water-water heat exchanger to be recycled after being subjected to heat absorption and cooling by the second-class absorption heat pump, black water waste heat is converted into high-grade steam required by production through the heat exchange unit, the heat medium water unit and the second-class absorption heat pump, waste of gasified black water waste heat is reduced, and the black water waste heat recovery efficiency and utilization quality are effectively improved. And the utilization efficiency of energy is integrally improved.

The calcium-based thermochemical heat storage system based on the modular fixed bed comprises a thermochemical energy storage device, a gas inlet is formed in one side of the thermochemical energy storage device, and a carrier gas outlet is formed in the other side of the thermochemical energy storage device; the water vapor system is connected with the air inlet; the first heat recovery system comprises a waste heat boiler, the carrier gas outlet is connected with the gas inlet end of the waste heat boiler through a pipeline, and the steam outlet end of the waste heat boiler is connected with the water steam system; the second heat recovery system comprises a steam-water heat exchanger and a circulating water pump; two ends of the steam-water heat exchanger and the user side form a circulating pipeline through the circulating water pump; the steam outlet end of the waste heat boiler is connected with the steam inlet end of the steam-water heat exchanger. Through cooperative configuration of the thermochemical energy storage device, the waste heat boiler and the steam-water heat exchanger, water vapor is stably conveyed to the thermochemical energy storage device to react with a calcium-based material by controlling a valve and flow, and released reaction heat is transmitted to a heat storage medium or a user side through the steam-water heat exchanger; the problem of heat release power attenuation of a traditional fixed bed reactor is solved.

The invention relates to the technical field of heat pump manufacturing, and provides a heat pump steam system operation method capable of reducing steam conveying loss, which comprises the following steps: constructing a concentric pipeline, and designing the size of an energy storage tank; the heat pump steam generation system is operated, a refrigerant circulates in a loop of the heat pump steam generation system, and meanwhile a condenser in the heat pump steam generation system prepares steam; a steam-liquid simultaneous transportation system is operated, and steam prepared by the condenser is conveyed to an energy storage tank with the designed size through an inner-layer pipeline of the constructed concentric pipeline and then conveyed to a user side; meanwhile, hot water is conveyed to the energy storage tank through a gap between the outer-layer pipeline and the inner-layer pipeline of the concentric pipeline, and continuous thermal compensation of steam in the inner-layer pipeline is achieved; a water supplementing system is operated, and water is supplemented to the condenser according to the liquid level in the condenser; wherein the outlet temperature when the steam is conveyed to the user side is controlled by adjusting the frequency of a variable frequency water pump in the steam-liquid simultaneous conveying system. The problems that an existing heat pump steam system is large in heat loss, and the steam quality is reduced are solved.

The present application relates to a kind of superfine industrial gypsum filler zero carbon flash production system, including steam system, crushing system, collection system;The steam system includes electric steam boiler, water softener, grinding system includes crushing chamber, Laval nozzle, grading device, auxiliary heater, collection system includes cyclone dust collector, bag dust collector, induced draft fan.The present application has the characteristics of high production efficiency, less site use, low production cost.

The utility model discloses a heating and steam generating system coupled with waste heat resources of a data center, and belongs to the technical field of waste heat recovery of the data center. According to the utility model, the waste heat of the data center is collected through the waste heat recovery unit, and the heat of the waste heat is transferred to the lithium bromide heating unit through the low-temperature lithium bromide heat exchange device, so that the energy consumption of direct heating is reduced. Through the design of the multiple stages of heat exchange units, step-by-step utilization of heat is achieved, and the utilization efficiency of energy is improved. Different grades of steam are respectively stored through the high-temperature steam storage tank, the medium-low temperature steam storage tank and the hot water storage device, so that graded utilization of energy is realized; the lithium bromide heating unit provides heat energy for the multi-stage heat exchange unit, the lithium bromide heating unit utilizes waste heat, and the heat supply cost of the system is reduced. The technical problem that waste heat resources of the data center cannot be efficiently utilized in the prior art is solved.

The utility model discloses a multi-heat-source composite low-carbon steam system, which belongs to the technical field of heat supply, and comprises a line focusing heat collection device and a steam output device, and the steam output device is connected with the line focusing heat collection device. A high-temperature heat source device and a low-temperature heat source device are further included; the low-temperature heat source device is connected with the line focusing heat collecting device and the high-temperature heat source device through a thermal deaerator in the steam output device, and the high-temperature heat source device is connected with the steam output device. According to the technical scheme, three clean energy sources including solar energy, off-peak electricity and air energy are fully utilized to produce industrial steam, multi-heat-source composite energy gradient utilization is achieved, multiple clean energy-saving technologies are used in a coupling mode, and the system operation cost can be effectively reduced. According to the multi-energy complementary steam energy-saving system, clean energy replacement of industrial heat is achieved, and the production and operation cost of enterprises is greatly reduced.

This invention provides an energy-saving industrial steam circulation system, comprising a boiler assembly, a vortex tube assembly, a load unit, a deaerator, and a back pressure regulating valve. Low-pressure steam generated by the boiler assembly is fed into the vortex tube assembly via a low-pressure main pipe, where it is separated into superheated steam at a cold end (0.12 MPa), superheated steam at a hot end (0.4 MPa), and high-temperature condensate at a drain end (0.12 MPa). The cold end steam serves as the heat source for the deaerator, the hot end steam supplies the load unit, and the drain end condensate is fed into the deaerator for makeup water via the back pressure regulating valve. After deaeration, the feedwater returns to the boiler, forming a closed-loop circulation. This invention achieves energy cascade utilization through the vortex tube, recovering energy wasted in traditional pressure reduction and high-quality water resources, improving steam quality and system stability, significantly reducing energy consumption, water consumption, and operating costs, and is suitable for the construction and renovation of industrial steam systems.

The invention discloses an intelligent management and control method and system for a steelmaking steam system, and the method comprises the steps: collecting the multi-source data of the steelmaking steam system through a data collection layer, and enabling the multi-source data to comprise pipe network pressure data, steam flow data, converter production plan data, RH furnace production plan data and heat accumulator pressure data; a multi-element intelligent model is constructed on an intelligent analysis layer, according to the multi-source data, the steam production, consumption and storage trend in a future preset time period is predicted through the multi-element intelligent model, and a PLC control strategy is generated in combination with a preset pipe network pressure safety boundary; and dynamic closed-loop control is carried out on a heat accumulator valve in an application control layer according to a PLC control strategy, so that the pressure fluctuation of the heat accumulator is within a target range. In this way, the steam utilization efficiency can be improved in an assisted mode, production stability is guaranteed, and energy cost is reduced.