2170 results about "Molten salt" patented technology

The invention relates to a hot-rolled wire rod for a 2230 MPa grade stranded wire and a manufacturing method of the hot-rolled wire rod, after a Cr-Nb-Al high-carbon component design is rolled and spun into a wire rod, the wire rod is subjected to online molten salt isothermal toughening treatment, so that the wire rod is firstly subjected to front-section molten salt treatment and enters a sorbite phase region from an austenite state to form a structure taking a sorbite structure as a main structure; and then carrying out rear-section molten salt treatment, reducing the circulation volume of molten salt, promoting the unconverted retained austenite to be continuously converted into sorbite, carrying out isothermal tempering, promoting fusing of a part of sorbite lamellar layers, and finally carrying out slow cooling through a roller way, so as to prepare the hot-rolled wire rod of which the microscopic structure comprises a mixed structure consisting of tempered sorbite, ferrite and fused sorbite, the material cost can be controlled, the tensile strength is 1513-1563 MPa, the percentage reduction of area is 31%-36%, and the structure uniformity and the production efficiency are both considered, so that off-line heat treatment is avoided during stranded wire manufacturing, and the drawing pass and the cracking risk are reduced.

The invention relates to a hot-rolled wire rod for a 2260MPa-grade stranded wire and a manufacturing method of the hot-rolled wire rod, after the high-carbon component design of C-Si-Mn-Cr-Mo-Nb-Al is adopted for rolling and spinning to form the wire rod, online molten salt isothermal toughening treatment is carried out, so that the wire rod is firstly subjected to front-section molten salt treatment and is rapidly cooled, and enters a sorbite phase region from an austenite state to form a structure taking a sorbite structure as a main structure; and then carrying out rear-section molten salt treatment, reducing the circulation volume of molten salt, promoting the unconverted retained austenite to be continuously converted into sorbite, carrying out isothermal tempering, promoting fusing of a part of sorbite lamellar layers, and finally carrying out slow cooling through a roller way, so as to prepare the hot-rolled wire rod of which the microscopic structure comprises a mixed structure consisting of tempered sorbite, ferrite and fused sorbite, the tensile strength can reach 1534-1584 MPa, the percentage reduction of area can reach 33%-38%, and the alloy can be used in the application fields of manufacturing 2260 MPa grade stranded wires and the like without additional heat treatment procedures.

The invention relates to a high-strength complex-phase hot-rolled wire rod for a 2230 MPa grade stranded wire and a manufacturing method of the high-strength complex-phase hot-rolled wire rod. After a Nb-containing high-carbon component is used for rolling and spinning at a spinning temperature to form a wire rod, online molten salt mixing quenching isothermal treatment is carried out, so that the wire rod is firstly subjected to front-section molten salt treatment and is cooled at a cooling speed of more than or equal to 35 DEG C / s, and enters a bainite and pearlite mixed phase region from an austenite state; the method comprises the following steps: firstly, carrying out heat treatment on austenite to promote part of austenite to be converted into bainite and sorbite, then carrying out later-section molten salt treatment, increasing the molten salt temperature, promoting unconverted retained austenite to be decomposed and converted into sorbite, carrying out isothermal tempering, and finally, carrying out roller way slow cooling, so as to prepare the hot-rolled wire rod of which the microscopic structure comprises a complex-phase structure consisting of tempered bainite and tempered sorbite, the drawing and hardening capacity can be improved, the production efficiency is considered, the tensile strength is 1522-1572 MPa, and the percentage reduction of area is 29%-34%, so that off-line heat treatment is avoided, and the wire breaking risk and cost of stranded wire manufacturing are reduced.

The invention relates to the technical field of rare earth metal electrolysis cathode protection coatings, in particular to a high-temperature-corrosion-resistant yttrium-stabilized zirconia gradient coating on the surface of a tungsten cathode. A metallurgically bonded strong bonding bottom layer is constructed on a tungsten substrate through surface pretreatment and reactive sintering, then an atmosphere plasma technology is adopted to spray a creep-resistant gradient layer with continuous components to buffer thermal stress, and finally a sol-gel technology is utilized to construct an extremely compact corrosion-resistant surface layer in a superposition mode. The high-temperature-corrosion-resistant yttrium-stabilized zirconia gradient coating is constructed through a multi-scale and multi-mechanism synergistic effect, the problems that a tungsten cathode coating is insufficient in binding force and poor in thermal shock resistance are fundamentally solved, molten salt permeation can be blocked, and the service life of a tungsten cathode in a severe environment is remarkably prolonged.

The invention relates to a high-strength complex-phase hot-rolled wire rod for a 2200MPa-grade stranded wire and a manufacturing method of the high-strength complex-phase hot-rolled wire rod, and the manufacturing method comprises the following steps: rolling and spinning to form a wire rod by adopting a high-hardenability component design, and then carrying out online molten salt mixed phase region quenching isothermal treatment, so that the wire rod is firstly subjected to front-section molten salt treatment and enters a bainite and pearlite phase region from an austenite state; the method comprises the following steps: carrying out high-temperature treatment on austenite to promote part of austenite to be converted into bainite and sorbite, carrying out later-section molten salt treatment, increasing the molten salt temperature, reducing the molten salt circulation amount, promoting unconverted retained austenite to be decomposed and converted into bainite and sorbite, carrying out isothermal tempering, and finally carrying out slow cooling through a roller way, the hot-rolled wire rod with a microscopic structure comprising a complex phase structure composed of tempered bainite and tempered sorbite is prepared, the material cost can be reduced, the complex phase structure and the structure toughness can be regulated and controlled on line, the tensile strength is 1505-1555 MPa, the percentage reduction of area is 32%-37%, efficiency and energy consumption are both considered, off-line heat treatment is avoided, and high-efficiency production of stranded wires is promoted.

The invention relates to a hot-rolled wire rod for a 2200MPa-grade stranded wire and a manufacturing method of the hot-rolled wire rod, after Nb-Al high-carbon component is rolled and spun into a wire rod, the wire rod is subjected to online molten salt strong isothermal treatment, so that the wire rod is firstly subjected to front-section molten salt treatment and enters a sorbite phase region from an austenite state to form a structure taking a sorbite structure as a main structure, and then is subjected to rear-section molten salt treatment to form the hot-rolled wire rod for the 2200MPa-grade stranded wire. The molten salt temperature is increased, the molten salt circulation amount is reduced, unconverted retained austenite is promoted to be continuously converted into sorbite, isothermal tempering is carried out, part of sorbite lamellas are promoted to be fused, and finally slow cooling is carried out through a roller way, so that the hot-rolled wire rod with the microscopic structure comprising a mixed structure composed of tempered sorbite, ferrite and fused sorbite is prepared. According to the method, abnormal structures can be inhibited, the strength of a hot-rolled wire rod can be improved, plasticity and production efficiency are both considered, the tensile strength is 1490-1540 MPa, the percentage reduction of area is 34%-39%, downstream users can avoid off-line heat treatment, and stable production of stranded wires is promoted.

The invention relates to a high-strength complex-phase hot-rolled wire rod for a 2360MPa-grade stranded wire and a manufacturing method of the high-strength complex-phase hot-rolled wire rod. After a Mo-V high-carbon component system is rolled and spun into a wire rod, the wire rod is subjected to on-line molten salt weak quenching toughening treatment, so that the wire rod is subjected to front-section molten salt treatment to be quickly cooled, enters a bainite and sorbite mixed phase region from an austenite state, and is subjected to high-temperature heat treatment to form a high-strength complex-phase hot-rolled wire rod; the method comprises the following steps: firstly, carrying out heat treatment on residual austenite to form a structure mainly comprising bainite and sorbite, then carrying out later-section molten salt treatment, increasing the temperature of molten salt, promoting decomposition and conversion of unconverted residual austenite into sorbite, carrying out isothermal tempering, and finally, carrying out roller way slow cooling to prepare a hot-rolled wire rod of which the microscopic structure comprises a complex-phase structure consisting of tempered bainite and tempered sorbite, the method has the advantages that the structure toughness can be regulated and controlled on line, the tensile strength is 1574-1627 MPa, the percentage reduction of area is 28-33%, the mechanical property fluctuation is reduced, the material cost and the production efficiency are both considered, the ultra-high-strength stranded wire can be produced without off-line heat treatment, and the wire breaking risk is reduced.

The invention relates to a high-strength complex-phase hot-rolled wire rod for a 2260MPa-grade stranded wire and a manufacturing method of the high-strength complex-phase hot-rolled wire rod, after the high-carbon component design of C-Si-Mn-Cr-V-Nb-V is rolled and spun into a wire rod, the wire rod is subjected to online molten salt mixed quenching isothermal treatment, so that the wire rod is subjected to front-section molten salt treatment to be quickly cooled, enters a bainite and pearlite mixed phase region from an austenite state, and is subjected to hot rolling and hot rolling to form the high-strength complex-phase hot-rolled wire rod. The method comprises the following steps: carrying out first-stage molten salt treatment on austenite to promote transformation of part of austenite to bainite and sorbite, then carrying out later-stage molten salt treatment to increase the molten salt temperature, promoting decomposition and transformation of untransformed retained austenite into sorbite, carrying out isothermal tempering, and finally carrying out slow cooling through a roller way, a hot-rolled wire rod with a microscopic structure comprising a complex-phase structure composed of tempered bainite, tempered sorbite and ferrite is manufactured, the tensile strength is 1547-1597 MPa, and the percentage reduction of area is 27%-32%, so that when a high-strength stranded wire is manufactured, off-line heat treatment is not needed, the drawing pass number is reduced, and the wire breaking risk is reduced.

A method for synergistically preparing lithium sulfide by vacuum molten salt based on hydrogen sulfide-lithium salt reaction belongs to the technical field of battery materials, and comprises the following steps: placing a lithium salt solid in a reactor, introducing a molten salt medium on the surface of the lithium salt or in a reaction system, introducing purified hydrogen sulfide gas under a vacuum auxiliary condition, controlling the reaction temperature to be 200-500 DEG C, and reacting for 1-2 hours; and adjusting the flow rate of hydrogen sulfide to be 50-1000mL / min and the retention time to be 5-180min, continuously exhausting gas to discharge water vapor in the reaction process, stopping introducing hydrogen sulfide gas after the reaction is finished, cooling the system to room temperature under the protection of inert gas, taking out the product, washing to remove residual fused salt, and carrying out vacuum drying to obtain the high-purity lithium sulfide. The prepared lithium sulfide has high purity (greater than or equal to 99.90%), low defect density and an excellent crystal structure, and can be widely applied to lithium-sulfur batteries, all-solid-state batteries and novel energy storage technologies, so that the energy density is improved, the cycle life is prolonged, and the energy consumption is reduced.

The invention relates to the technical field of rare earth metal hydrometallurgy, in particular to a rare earth molten salt electrolysis truss type multifunctional metal output system and a control method.The system comprises a main body supporting and moving frame, an integrated function execution module set, a bottom cleaning function module, an electrolytic bath station unit and an intelligent control system; wherein the integrated function execution module group, the bottom cleaning function module, the electrolytic tank station unit and the intelligent control system are respectively arranged in the main body support and motion frame, and the main body support and motion frame is arranged in a gantry truss structure; the four functions of pot lifting, casting, cooling and bottom cleaning in rare earth electrolysis are integrated on the integrated bearing platform of the same gantry truss type rack, and through multi-sensing information fusion and intelligent control, the system can automatically complete the whole process operation of crucible extraction, molten metal casting, cooling forming and electrolytic bath bottom cleaning; and the exposure of workers in high-temperature and high-risk environments is obviously reduced, and the production safety and efficiency are improved.

The invention provides a method for recovering Si, C and TiO2 based on chlorinated waste salt water quenching slag, which comprises the following steps: sequentially carrying out water quenching dissolution, precipitation separation and filter pressing dehydration treatment on chlorinated waste salt to obtain water quenching slag and supernate; adding a dilute acid solution into the water-quenched slag, dissolving, and adding a reducing agent for reaction to obtain slurry; carrying out solid-liquid separation on the slurry to obtain a solid material and filtrate; the filtrate is pumped into a boiling bed separator, the petroleum coke and TiO2 are intercepted by a medium material layer, clear liquid is discharged, then the medium material layer is subjected to backwashing regeneration, and the desorbed petroleum coke and TiO2 are subjected to graded enrichment by a hydrocyclone, so that petroleum coke slurry and TiO2 slurry are obtained. According to the method, TiO2, C and other resources in the water-quenched slag obtained after molten salt chlorination waste salt water quenching are recycled, and the technical problem that in the existing chlorination waste salt resourceful treatment process, Si, C, TiO2 and other resources in the water-quenched slag are wasted is solved.

The invention discloses a method for preparing an ultrahigh-temperature ceramic coating by an ultrahigh-temperature metal gas source based on a molten salt medium, which comprises the following steps of: mixing low-melting-point salt A, metal fluoride and metal M to obtain a mixture C, putting the mixture C into a first crucible, mixing low-melting-point salt B and metal M to obtain a mixture D, putting the mixture D into a second crucible, putting a carbon base material into a deposition furnace, and performing vacuum drying to obtain the ultrahigh-temperature ceramic coating. Heating the first crucible to melt the mixture C to obtain a melt E, and heating the second crucible to melt the mixture D to obtain a melt F; carrier gas is guided into the first crucible, the carrier gas flow passes through the melt E to form gas flow containing a metal gas source, the gas flow containing the metal gas source is guided into the second crucible, and the gas flow containing the metal gas source is filtered by the melt F in the second crucible to form a pure metal reaction gas source, and finally, a pure metal reaction gas source is introduced into the deposition furnace for deposition of the carbon base material, and the ultra-high-temperature ceramic coating is obtained. The method is easy to operate and low in cost.

The invention relates to the technical field of molten salt, in particular to nitro binary molten salt and a preparation method thereof. The preparation method comprises the following steps: mixing sodium carbonate and a potassium hydroxide solution, and then adding a starch-based grafted crystal inhibitor to inhibit crystallization; adding a nitric acid aqueous solution in two stages, and introducing eutectic seed crystals to guide nucleation at the end of the first stage; crystal distribution is optimized through falling film evaporation and concentration and setting of partial reflux; and after spraying granulation, carrying out short-time melting reforming and controlled cooling in an inert atmosphere. According to the method, the composition uniformity and the structural stability of the molten salt are remarkably improved, so that the product has a melting point close to a theoretical eutectic point, low supercooling degree, high melting latent heat and excellent thermal cycling stability and corrosion resistance, and is suitable for an industrial heat storage system running for a long time.

The invention discloses a method for preparing tantalum carbide powder by carburization based on a double-effect synergistic effect of molten salt activation and catalytic decomposition, which comprises the following steps: mixing molten salt powder A and tantalum powder to obtain mixed powder, heating the mixed powder to 600-1200 DEG C for activating treatment to obtain activated tantalum powder, separately placing molten salt powder B and the activated tantalum powder in a heating furnace, heating the heating furnace to 100-200 DEG C, heating the heating furnace to 100-200 DEG C, and heating the heating furnace to 100-200 DEG C to obtain the tantalum carbide powder. The heating furnace is heated to enable the molten salt powder B to be converted into molten salt, then carbon source gas firstly flows through the molten salt to form active gas, the active gas makes contact with the activated tantalum powder to react, and the tantalum carbide powder is obtained. On one hand, the tantalum powder is subjected to surface activation treatment through the molten salt, and the reaction activity of the tantalum powder is improved; the molten salt medium assists in organic gas decomposition, the thermal decomposition efficiency of the organic gas is improved, the production energy consumption is effectively reduced under the cooperation of the molten salt auxiliary gas decomposition and the molten salt activation tantalum powder process, and the product purity and uniformity are improved.

The invention relates to the technical field of molten salt treatment, and discloses a molten salt recovery system based on a steel belt cooling granulator. The system comprises a molten salt physical property monitoring module, a viscosity modeling module, a cooling optimization module, a partition temperature control module, a phase change monitoring module, a dynamic adjustment module, a particle size analysis module, a quality grading module, a pneumatic conveying module and a waste heat recovery module. The progressive crystallization control of the molten salt particles is realized; a heat pipe type heat exchanger and an organic Rankine cycle system are integrated at the waste heat recovery end, so that comprehensive energy consumption is reduced; the environment regulation and control end monitors the workshop temperature and humidity in real time based on a dew point calculation model, and the long-term stability of hygroscopic fused salt particles is guaranteed. According to the method, four technical bottlenecks of out-of-control crystallization, energy waste, classification loss and environmental interference in fused salt recovery are overcome, and low-cost, high-purity and zero-waste fused salt resource recycling is realized.

According to the high-strength complex-phase hot-rolled wire rod for the 2300 MPa grade stranded wire and the manufacturing method of the high-strength complex-phase hot-rolled wire rod, after Mo-V high-carbon components are rolled and spun into the wire rod, online molten salt section quenching isothermal treatment is conducted, the wire rod is subjected to front-section molten salt treatment and cooled at the cooling speed larger than or equal to 39 DEG C / s, the wire rod enters a bainite phase region from an austenite state, and then the high-strength complex-phase hot-rolled wire rod is obtained; the method comprises the following steps: carrying out high-temperature treatment on austenite to promote part of austenite to be converted into bainite, then carrying out later-section molten salt treatment, increasing the molten salt temperature, promoting unconverted retained austenite to be decomposed and converted into sorbite, carrying out isothermal tempering, and finally carrying out roller way slow cooling to prepare the hot-rolled wire rod of which the microscopic structure comprises a complex-phase structure consisting of tempered bainite, tempered sorbite and ferrite, by means of the method, complex-phase structure regulation and control and online toughening can be achieved, the material cost and the production efficiency are both considered, the tensile strength is 1552-1602 MPa, the percentage reduction of area is 32%-38%, and therefore off-line heat treatment is avoided, and ultrahigh-strength stranded wires are efficiently produced.

The embodiment of the invention relates to the technical field of induction pumps, in particular to a high-temperature liquid metal electromagnetic pump which comprises a main body, an inductor, a temperature sensor and an excitation controller. The main body is hermetically connected with a conveying piece for conveying high-temperature liquid metal; the inductor is arranged to enable the high-temperature liquid metal in the main body to generate induction current and enable the high-temperature liquid metal to generate pressure difference at different positions of the main body, so that the high-temperature liquid metal can flow at different positions; the temperature sensor monitors the temperature in the main body; the excitation controller is set to be capable of adjusting the power supply voltage and frequency of the inductor; the main body is arranged to be capable of preventing heat transfer of the high-temperature liquid metal to the inductor. The electromagnetic pump can meet the sealing requirement of high-temperature liquid metal conveying; flow control is facilitated, and the requirement for controllable conveying of high-temperature liquid metal in the molten salt electrolysis dry-method technological process is met; the failure of the high-temperature liquid metal electromagnetic pump can be avoided, and the operation stability and reliability of the electromagnetic pump can be improved.

The invention relates to a layered oxide material with high cycle stability and a preparation method and application thereof, the chemical formula of the layered oxide material is LiaNabNixMn (1-x) O2, 0 lt; xlt; 0.90 < = a < = 1, 0 < = b < = 0.1; the preparation method comprises the following steps: preparing a layered oxide precursor NaNi < x > Mn < 1-x > O < 2 >; mixing the precursor with a first lithium source, and then carrying out lattice site Li < + > / Na < + > replacement by at least one of molten salt ion exchange, solid phase ion exchange and liquid phase ion exchange to obtain an intermediate; cleaning the intermediate, performing solid-liquid separation, and drying to obtain a layered oxide material with high cycle stability; the layered oxide material is prepared through lattice site selective Li < + > / Na < + > replacement reaction, so that the obtained material has excellent cycling stability and specific capacity, and the method is simple in process, low in cost and suitable for large-scale production.

The invention relates to the technical field of electric heater preheating, in particular to an electric heater preheating system and method. Wherein the electric heater comprises a shell, an electric heating tube and a junction box; the preheating device comprises a hot air module, a control module, a pressure sensor, a temperature and humidity sensor and a switch valve. The hot air module comprises a draught fan, a heating piece and a connecting air pipe, and the connecting air pipe is connected with the first pipe opening so that hot air generated by the hot air module can be input into the shell through the first pipe opening. The second pipe orifice is used for discharging air, the pressure sensor and the temperature and humidity sensor are arranged at the second pipe orifice to detect a pressure value, a temperature value and a humidity value, and the switch valve is arranged at the second pipe orifice to adjust the opening and closing and / or the opening degree of the second pipe orifice. When the electric heater is in a shutdown state, the external preheating device is connected with the electric heater to form a preheating system, energy of a molten salt system does not need to be depended on, non-internal circulation air is utilized, and preheating and moisture removal of the electric heater are achieved.

A gas and steam power generation afterburning type heat-electricity decoupling system and a working mechanism thereof, characterized in that the system comprises a gas turbine power generation system, a power transmission and transformation system, a molten salt heat storage system and a steam power generation system; the gas turbine power generation system is connected with the molten salt heat storage system through a flue gas pipeline; the molten salt heat storage system is connected with the power transmission and transformation system through a cable; the gas turbine power generation system is connected with the power transmission and transformation system through a cable; the molten salt heat storage system is connected with the steam power generation system through a main steam pipeline and a backwater pipeline; and the steam power generation system is connected with the power transmission and transformation system through a cable. The system can realize complete heat-electricity decoupling in a green energy storage system, realize the functions of self-supply of external power, storage of green electricity or heat supply, increase the accommodation capacity of a power grid to green electricity, and enhance the stability, flexibility and safety of a new power system.

The invention relates to a hot-rolled wire rod for a 2160MPa-grade stranded wire and a manufacturing method of the hot-rolled wire rod, after a high-carbon component system containing trace Nb is rolled and spun into a wire rod, the wire rod is subjected to online molten salt sorbite regulation and control treatment, so that the wire rod is firstly subjected to front-section molten salt treatment and quickly enters a sorbite phase region from an austenite state to form a structure taking a sorbite structure as a main structure; the method comprises the following steps: firstly, carrying out hot rolling on unconverted retained austenite, then carrying out rear-section molten salt treatment, increasing the molten salt temperature, reducing the molten salt circulation amount, promoting the unconverted retained austenite to be continuously converted into sorbite, carrying out isothermal tempering, and finally, carrying out roller way slow cooling to prepare a hot-rolled wire rod of which the microscopic structure comprises a mixed structure consisting of tempered sorbite, ferrite and fused sorbite, so that the deterioration of the structure can be inhibited, and the service life of the hot-rolled wire rod is prolonged. The tensile strength of the hot-rolled wire rod is 1461-1496 MPa, the percentage reduction of area is 33%-38%, the difference of the same circle of mechanical properties is smaller than or equal to 42 MPa, meanwhile, the production energy consumption is reduced, and efficient and stable production of the hot-rolled wire rod and the stranded wire is facilitated.

The invention relates to a high-strength complex-phase hot-rolled wire rod for a 2330MPa-grade stranded wire and a manufacturing method of the high-strength complex-phase hot-rolled wire rod. After a Mo-containing high-carbon component is rolled and spun into a wire rod, the wire rod is subjected to online fused salt mixed quenching toughening treatment, so that the wire rod is subjected to front-section fused salt treatment and is rapidly cooled, and enters a bainite and sorbite mixed phase region from an austenite state; the method comprises the following steps: firstly, carrying out heat treatment on residual austenite to form a structure mainly comprising bainite and sorbite, then carrying out later-section molten salt treatment, increasing the temperature of molten salt, promoting decomposition and conversion of unconverted residual austenite into sorbite, carrying out isothermal tempering, and finally, carrying out roller way slow cooling to prepare a hot-rolled wire rod of which the microscopic structure comprises a complex-phase structure consisting of tempered bainite and tempered sorbite, according to the hot-rolled steel wire rod, complex-phase structure regulation and control and online toughening can be achieved, the production efficiency is considered, the tensile strength of the hot-rolled steel wire rod can reach 1563-1613 MPa, the percentage reduction of area can reach 29%-34%, offline heat treatment is not needed when the ultrahigh-strength stranded wire is produced, and the wire breaking risk is reduced.

The invention belongs to the technical field of electric power peak regulation and energy distribution, and discloses a thermal power generation energy storage system based on heat storage and energy storage cooperation and an operation control method thereof. The thermal power generation energy storage system comprises a thermal generator set unit, a fused salt energy storage unit, a storage battery energy storage unit and a control unit, and the control unit is used for controlling the storage battery energy storage unit and the fused salt energy storage unit to store energy when a power grid is in a low ebb or new energy output is excessive; when the power grid is in a peak, the storage battery energy storage unit and the fused salt energy storage unit are controlled to release energy; when the storage battery energy storage unit and the fused salt energy storage unit are controlled to release energy, fused salt in the high-temperature tank is preferentially scheduled to generate steam through the second heat exchanger, and then the storage battery energy storage unit and the fused salt energy storage unit are scheduled to respond according to the fluctuation condition of the power grid. According to the invention, fused salt heat storage and battery energy storage are used for complementary peak regulation, and efficient, flexible, economical and safe peak regulation of the power system is realized.

The invention relates to a fused salt heat storage system based on heat energy grading matching. The system comprises a first-stage heat exchange unit, a second-stage heat exchange unit, a third-stage heat exchange unit and a mixing unit, and the first-stage heat exchange unit comprises a first-stage fused salt heat storage loop and a first-stage heat exchange adjusting valve and is used for absorbing and storing high-grade heat of exhaust gas of an exhaust pipeline of a boiler furnace; the second-stage heat exchange unit comprises a second-stage fused salt heat storage loop and a second-stage heat exchange regulating valve and is used for absorbing and storing high-grade heat of main steam extraction of a main steam extraction pipeline of a high-pressure cylinder of the steam turbine; the third-stage heat exchange unit comprises a third-stage fused salt heat storage loop and a third-stage heat exchange regulating valve and is used for absorbing and storing low-grade heat of air exhaust of an intermediate-pressure cylinder of an air exhaust pipeline of the intermediate-pressure cylinder of the steam turbine; the mixing unit mixes the three kinds of exhaust heat and outputs working medium fluid meeting the target temperature so as to adapt to different preset operation working conditions of the thermal power generating unit. Therefore, heat energy can be stored and released in a gradient mode through the system, wide-temperature-range efficient utilization is achieved, and the flexibility and energy efficiency of the thermal power generating unit are improved.

The invention discloses a process for separating and recycling scandium, manganese and iron in iron-manganese slag, and belongs to the technical field of metallurgical engineering and comprehensive utilization of secondary resources. The method comprises the following steps: crushing the iron and manganese slag, mixing the crushed iron and manganese slag with a chlorinating agent and a molten salt medium, and carrying out chlorination reaction at 600-850 DEG C, so that iron and manganese are converted into chlorides to volatilize, and scandium is enriched in the slag; the volatile gas is subjected to multi-stage gradient condensation, and manganese and iron concentrates are respectively recovered in different temperature intervals; and leaching-extracting the chlorination residues to obtain a scandium-rich substance. According to the method, source separation and collaborative recovery of iron, manganese and scandium are achieved through pyrogenic process chlorination-condensation, the problems that in a traditional wet process, metal interferes with one another, the process is long, and pollution is heavy are solved, and the method has the advantages of being short in process, small in pollution and high in recycling degree.

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

The invention relates to a molten salt tank and discloses a high-low position integrated molten salt tank which comprises a vertical molten salt storage tank and a low molten salt storage tank which are connected into a whole, the low molten salt storage tank is located on one side of the bottom of the vertical molten salt storage tank, and a molten salt inlet and a breathing opening are formed in the top of the vertical molten salt storage tank; a short shaft pump is mounted at the top of the low-position fused salt storage tank, and an outlet of the short shaft pump is connected with a fused salt conveying pipeline; and a communicating pipe is arranged between the top of the vertical molten salt storage tank and the top of the low-position molten salt storage tank. According to the molten salt tank, the short-shaft pump is used, the vibration problem caused by a long-shaft pump can be avoided, meanwhile, the lowest liquid level of molten salt can be lowered, the dead zone of the molten salt is reduced, the consumption of the molten salt is reduced, and the cost is saved; the molten salt is driven by gravity to flow, the complex and potential unreliable siphoning effect is replaced, system operation does not depend on precise control and external force any more, safety and reliability are achieved, and the situations that flow adjustment is difficult and siphoning fails due to the fact that a siphon pipeline changes along with the liquid level in a tank are avoided.

The invention provides a combined heat and power system and a control method thereof, and relates to the technical field of combined heat and power. The system comprises a fuel gas heat and power cogeneration subsystem, a heat supply subsystem and a fused salt heat storage subsystem, the fuel gas heat and power cogeneration subsystem is used for fuel gas power supply, the fused salt heat storage subsystem can convert solar energy and / or flue gas generated by power supply into heat energy of high-temperature fused salt to be stored, and the heat supply subsystem conducts primary heating on heat supply return water through geothermal energy; and flue gas and / or high-temperature fused salt generated by power supply are / is used for conducting secondary heating on heat supply return water. Geothermal energy, solar energy and fused salt heat storage are coupled, and renewable energy sources are fully utilized for heat and power cogeneration, so that the power supply requirement and the heat supply requirement of a user are met. In the ground source heat pump unit, primary heating is conducted through geothermal energy, heat supply return water is heated into warm water, then the warm water is secondarily heated into hot water through smoke in the gas heat and power cogeneration system, the compression ratio of a compressor in a ground source heat pump can be reduced, and power consumption of the compressor is reduced.

The application discloses a supplemental combustion type flue gas molten salt heat exchanger and a working mechanism thereof, characterized in that: a supplemental combustion device is added in the upstream of a flue gas molten salt heat exchanger, the supplemental combustion device is connected with the flue gas molten salt heat exchanger through a flue, and a supplemental combustion type flue gas molten salt heat exchange integrated device is formed; the device comprises a supplemental combustion device or a supplemental combustion device, and a first-stage flue gas molten salt heat exchange component. The application can realize the functions of more uniform and efficient supplemental combustion heat transfer in the flue gas, realize a safer ignition mode of the supplemental combustion gas or the mixed body of the atomized supplemental combustion gas and liquid (or gas powder) outside the flue, realize the function of more convenient monitoring of the supplemental combustion, realize the complete decoupling of heat and electricity in the combustion engine power generation heat supply energy storage system, and realize the functions of self-supply of external power, heat storage or heat supply of the system.

The invention relates to a molten salt groove type heat collecting device, an operation method of the molten salt groove type heat collecting device and a molten salt groove type photo-thermal power station, and belongs to the field of molten salt groove type photo-thermal power stations. The heat collection mechanism comprises a plurality of heat collectors which are connected in series through pipelines to form a heat collector group, and the two ends of the heat collector group are communicated to the molten salt tank; the heat collector set is arranged in a U shape, a pipeline at the bottom of the U shape is a middle jumper pipe, and the middle jumper pipe is located at the highest position. And a gas outlet of the gas heating mechanism is communicated with the middle jumper pipe. The two ends of the U-shaped heat collector set are communicated with the fused salt tank, the highest position of the heat collector set is communicated with the gas heating mechanism, heating and salt injection can be conveniently conducted on the heat collectors, the automation degree is high, and convenience and rapidness are achieved.