174 results about "Regenerative system" patented technology

The invention provides a steam turbine, a regenerative system and a control method thereof, and the method comprises the steps: collecting data through a multi-mode sensor such as a steam pressure sensor, and constructing a digital twin model containing a thermodynamic equation and equipment aging parameters through the fusion of a space-time alignment algorithm; model deviation is predicted and dynamically calibrated by means of an LSTM network, a near-end strategy optimization algorithm is adopted to solve a Pareto optimal solution of heat recovery efficiency maximization and corrosion rate minimization in a digital twin environment, and a control instruction is generated. And when the corrosion prediction risk exceeds a threshold value, a control strategy is dynamically adjusted, and health-efficiency cooperative control is realized. Meanwhile, the invention further relates to a corresponding collaborative optimization device and corrosion monitoring equipment, and a multi-modal data fusion module is deployed at an edge computing node to realize efficient data processing and analysis. The thermodynamic cycle efficiency of the steam turbine regenerative system is effectively improved, the corrosion risk is reduced, the service life of equipment is prolonged, and remarkable economic and technical benefits are achieved.

The invention relates to the technical field of generator set mixed bed operation monitoring, and discloses a fine processing mixed bed failure situation situation sensing system and method, the sensing system comprises a sampling tube, a sampling electric valve, a sampling isolation valve, a cation resin column, a conductivity meter, a mixed bed failure monitoring device and a resin regeneration system; the sampling pipe extends into the central axis of the fine treatment mixed bed; a plurality of sampling pipes are arranged along the height direction of the fine treatment mixed bed, are sequentially connected with a sampling electric valve and a sampling isolation valve, and then are connected in series to one end of a cation resin column; the other end of the cation resin column is connected with the conductivity meter; the mixed bed failure monitoring device is electrically connected with the sampling electric valve, the sampling isolation valve and the conductivity meter; and the resin regeneration system is connected with a water inlet pipeline and a water outlet pipeline of the fine treatment mixed bed through a fine treatment mixed bed resin inlet valve and a fine treatment mixed bed resin outlet valve respectively. Situation awareness of mixed bed failure is achieved by establishing a layered monitoring system, and long-term stability of water quality of a water vapor system of a power plant is guaranteed.

The invention relates to the technical field of generator set mixed bed operation monitoring, and discloses an operation health degree monitoring method and system based on fine treatment mixed bed resin tracking, the monitoring system comprises a sampling tube, a sampling electric valve, a sampling isolation valve, a cation resin column, a conductivity meter, a mixed bed failure monitoring device and a resin regeneration system; the sampling pipe extends into the central axis of the fine treatment mixed bed; a plurality of sampling pipes are arranged along the height direction of the fine treatment mixed bed, are sequentially connected with a sampling electric valve and a sampling isolation valve, and then are connected in series to one end of a cation resin column; the other end of the cation resin column is connected with the conductivity meter; the mixed bed failure monitoring device is electrically connected with the sampling electric valve, the sampling isolation valve and the conductivity meter; and the resin regeneration system is connected with a water inlet pipeline and a water outlet pipeline of the fine treatment mixed bed through a fine treatment mixed bed resin inlet valve and a fine treatment mixed bed resin outlet valve respectively. Health degree monitoring is realized by establishing a layered monitoring system, and long-term stability of water quality of a power plant system is guaranteed.

The invention discloses a heat adsorption type drying machine with a three-tower structure and an adsorption regeneration technology of the heat adsorption type drying machine, and belongs to the technical field of adsorption type drying machines. The dryer comprises three adsorption towers, a regeneration system and a PLC control system, adsorbents are arranged in the adsorption towers, and the regeneration system comprises an electric heater and an air blower which are connected through a steel pipe. According to the dryer, the purpose of saving energy is achieved through the peak-valley-flat electricity price, the adsorption tower A, the adsorption tower B and the adsorption tower C conduct adsorption in the daytime, the regeneration and cold blowing process is conducted when the valley electricity price is utilized, and therefore the operation cost of the dryer is reduced; the adsorption regeneration process comprises two working modes: in the first working mode, adsorption is carried out for 12 hours in a tower A, adsorption is carried out for 12 hours in a tower B, and adsorption is carried out alternately in a tower C; and a second working mode: one tower performs adsorption work, one tower performs heating regeneration, and the other tower can perform cold blowing. The adsorption dryer with the three-tower structure can meet the requirement of a customer for reasonably selecting an off-peak electricity period for heating regeneration, so that the operation electric energy of equipment is greatly reduced.

Provided in the present invention are an adjustment system of a water supply thermal storage type thermoelectric generating set, and a design method and operation method therefor. The adjustment system comprises a high-pressure regenerative system, which is provided with a water supply outlet and a water drain outlet, wherein the water supply outlet is connected to a boiler by means of a water supply pipe; and a working medium heat storage system, which is connected to the water supply outlet or the water drain outlet by means of a water intake pipe, and is connected to the water supply pipe by means of a water output pipe. High-temperature supplied water or high-temperature drained water outputted from the high-pressure regenerative system is subjected to heat storage by means of the working medium heat storage system, and the working medium heat storage system can be decoupled or adjustably coupled between the high-pressure regenerative system and the boiler. When a load needs to be rapidly adjusted, the high-pressure regenerative system is decoupled from the boiler, the working medium heat storage system is used to supply water to the boiler so as to increase the feedwater flow and thermal load, and the feedwater flow of the working medium heat storage system is adjusted in combination with the maximum load lifting rate and the maximum load rate adjusting range of the thermoelectric generating set.

The invention relates to an efficient sludge treatment process, which mainly comprises a defibering and size mixing pretreatment device, a low-temperature damp and hot coalification system, a sewage pretreatment and detection feedback system, a wet oxidation system, a wet oxidation steam regeneration system, a wet oxidation pressure-stabilizing exhaust system, a sewage treatment system and a waste gas treatment system. All devices and systems of the process are coordinated for treatment, organic energy of the sludge and the organic wet garbage slurry is fully utilized and converted into heat to be used by the process, and a product is a coal compound, has a high heat value and is used as fuel. And the efficient treatment effects of reduction, harmlessness and recycling are achieved.

The invention discloses an acid regeneration system, a control method thereof and a medium. The acid regeneration system comprises a man-machine operation device, a controller and an acid regeneration unit, and the controller is used for receiving a control instruction sent by the man-machine operation device and sending an execution instruction to the acid regeneration unit according to the control instruction; the execution instruction comprises a steam condensate water amount execution instruction, and the steam condensate water conveying device is used for controlling the water amount of conveyed steam condensate water based on the steam condensate water amount execution instruction; the acid regeneration unit comprises a desilicication unit and a roasting unit; the desiliconization unit is used for desiliconizing the waste acid liquid to obtain purified iron liquid; the desiliconization unit comprises a purified iron liquid buffer tank for storing purified iron liquid and a steam condensate water conveying device for conveying steam condensate water to the purified iron liquid buffer tank, and the steam condensate water is used for diluting the purified iron liquid; and the roasting unit is used for roasting the diluted purified iron liquid to obtain iron oxide powder and regenerated acid. The iron oxide powder obtained by the system is good in quality.

Provided in the present invention are a primary frequency regulation dynamic simulation method and apparatus based on a thermal power condensate water throttling strategy, which are used for analyzing the dynamic characteristics of a unit when a power plant executes a primary frequency regulation instruction by means of a condensate water throttling strategy after a power disturbance occurs in a power grid. The dynamic characteristics mainly comprise the characteristics of a steam turbine speed governor system, the characteristics of a variable-frequency condensate pump system, the dynamic heat exchange characteristics of a low-pressure heater and extraction steam, the flow characteristics of an extraction steam pipeline, and the output characteristics of a steam turbine body. A moving boundary method is mainly applied to a heat exchange process between condensate water (a cold fluid) and shell-side extraction steam (a hot fluid) in a low-pressure heater. The heat exchange process between the cold and hot fluids can be divided into a superheated section, a phase change section and a subcooled section on the basis of the aggregation state of the extraction steam. When the moving boundary method is applied to a steam turbine regenerative system, the dynamic variation laws of extraction steam temperature and pressure can be more accurately obtained, and the extraction steam pressure on a low-pressure heater side is a key factor in determining the extraction steam flow rate on a low-pressure cylinder side, and is also critical in determining the instantaneous power increment of a steam turbine. Moving boundary method-based frequency regulation dynamic simulation for thermal power condensate water throttling takes into account relatively comprehensive actual process factors, and only one-dimensional modeling along an axial main flow direction is taken into account, thus combining the advantages of fast and accurate simulation. A fast and accurate simulation method is a prerequisite for implementing power grid frequency security analysis. By mastering the dynamic process of power plant load response from the moment a frequency deviation exceeds a dead band to the moment same returns to the dead band, a foundation can be provided for the primary frequency regulation control of power plants and the frequency security analysis of power grids.

The utility model discloses a power distribution system for a double-machine regenerative backpressure air extraction type turbine equipped with a balanced generator, which comprises a double-machine regenerative system equipped with a balanced generator, a converter subsystem, a dry-type rectifier transformer, a damping cabinet and a plurality of medium-voltage switch cabinets which are electrically connected in sequence, the damping cabinet and the medium-voltage switch cabinet are electrically connected through a pouring bus. According to the utility model, an oil-immersed rectifier transformer is replaced by the high-efficiency and energy-saving rectifier dry-type transformer, and the dry-type transformer has no fire spreading danger even if a short-circuit fault occurs, so that after the dry-type rectifier transformer is adopted, the rectifier transformer can be arranged in a power distribution room which is in a main power house and is closer to a converter and auxiliary power equipment; not only can the arrangement outside the steam engine room be simplified, but also the construction cost and arrangement workload of connecting cables can be reduced; after the rectifier transformer is arranged in the main power house, one oil-immersed rectifier transformer is omitted for each machine outside the main power house, so that the arrangement outside the main power house can be simplified.

The utility model relates to an efficient asphalt mixture full-regeneration system which comprises a regeneration drying cylinder, the feeding end of the regeneration drying cylinder is communicated with an air inlet of a feeding box, the discharging end of the regeneration drying cylinder is connected with the feeding end of a discharging box, and the feeding end of the regeneration drying cylinder is further connected with the discharging end of a batching unit through a conveying unit; the discharging end of the discharging box is connected with the feeding end of the metering discharging unit, the discharging end of the metering discharging unit is connected with the feeding end of the stirring equipment, and the feeding end of the stirring equipment is further connected with the discharging end of the feeding unit; a first gas port is formed in the discharging box and is connected with the combustor through the combustion chamber; a second gas port is formed in the feeding box and connected with the tail gas treatment unit. Materials can be prevented from being in direct contact with flames in the drying process, so that asphalt aging is prevented; meanwhile, the heat exchange efficiency is high, the tail gas temperature is low, treatment is convenient, and production resources are saved.

The invention discloses a rapid peak and frequency regulation system and method for a coal-fired unit with a regenerative system coupled with high-temperature working medium for heat storage, and relates to the technical field of conventional heating power and electricity technologies and energy storage, and the rapid peak and frequency regulation system comprises a coal-fired unit thermodynamic cycle system and a high-temperature working medium heat storage system, the high-temperature working medium heat storage system is deeply coupled with a thermodynamic cycle heat regeneration system of the coal-fired unit, and rapid combined peak regulation and frequency modulation of the unit are achieved by reducing the steam extraction amount of each stage of a steam turbine and cooperating with energy supply of the high-temperature working medium heat storage system. Firstly, when the unit needs to rapidly increase the load, rapid increase of the power generation output of the unit is achieved by reducing the steam extraction amount of each stage of a steam turbine, and meanwhile, high-temperature and high-pressure saturated water stored in a high-temperature working medium heat storage tank generates a certain amount of saturated steam through pressure reduction to replace steam extraction of each stage of the steam turbine to heat boiler feed water in a regenerative system; therefore, the water supply temperature of the boiler is kept unchanged or increased, and the variable load response capability of the coal-fired unit is quickly improved.

The embodiment of the invention provides a carbon dioxide capturing and regenerating system which comprises a regenerating tower, a reboiler, a steam supply unit, a rich liquid supply unit and a waste heat utilization unit, a liquid inlet of the reboiler is communicated with a liquid outlet of the regenerating tower, and a liquid outlet of the reboiler is communicated with a first liquid inlet of the regenerating tower; a steam outlet of the steam supply unit is respectively communicated with a second liquid inlet of the regeneration tower, a high-temperature side inlet of the reboiler and a rich liquid reheater of the rich liquid supply unit; a gas inlet of the waste heat utilization unit is communicated with an exhaust port of the regeneration tower, a liquid inlet of the waste heat utilization unit is respectively communicated with a high-temperature side outlet of the reboiler and a high-temperature side outlet of the rich liquid reheater, and a steam outlet of the waste heat utilization unit is communicated with the steam supply unit. Heat of high-temperature carbon dioxide gas and water vapor discharged by the regeneration tower is used for vaporizing condensed water discharged by the reboiler and the rich liquid reheater into water vapor through the waste heat utilization unit, high-temperature water vapor is supplemented for the regeneration tower, external steam supply is reduced, and heat energy consumption is saved.

The invention discloses a porous medium combustor unit regeneration system and a regeneration method thereof, and relates to the technical field of combustors, the porous medium combustor unit regeneration system comprises a porous medium combustor unit and a premixed gas pipeline connected with the porous medium combustor unit, the burner further comprises a waste gas pipeline, a premixing pipeline stop valve, a matching buckle cover and a compressed air pipeline branch pipe, the waste gas pipeline communicates with the porous medium burner unit, the waste gas pipeline stop valve is arranged on the waste gas pipeline, the premixing pipeline stop valve is arranged on the premixing gas pipeline, and the matching buckle cover is arranged on the compressed air pipeline branch pipe. The matching buckle cover is detachably buckled on the porous medium burner unit to form a closed space, at least one compressed air connector is arranged on the matching buckle cover, and the compressed air pipeline branch pipe is communicated with the compressed air connector and provided with a branch pipe cut-off valve. The integral online regeneration of the porous medium combustion unit can be realized, the operation is simple, the risk of disassembly and damage is avoided, and the service life of the combustor is effectively prolonged.

The invention provides a multivariable fusion-based low-pressure cylinder admission flow online soft measurement method, belongs to the technical field of steam turbine operation control, and can at least partially solve the problems of insufficient measurement precision in a small flow area, poor stability under system disturbance and limited adaptability of a single model in the prior art. The method comprises the steps that the steam inlet pressure, temperature, steam exhaust pressure and blast temperature of a low-pressure cylinder and relevant parameters of a regenerative system are collected; respectively calculating a physical estimation amount, a calibration correction amount and a heat regeneration balance amount; the weight coefficient is adaptively set according to the operation working condition, the three types of information sources are fused, and the real-time measurement value of the steam inlet flow of the low-pressure cylinder is obtained.The method has the beneficial effects that the accuracy and stability of the measurement result can be kept under the multiple working conditions of large flow, small flow, system disturbance and the like, and good real-time performance and engineering adaptability are achieved. The method can be widely applied to scenes of steam turbine operation monitoring, performance analysis and protection strategy optimization.

The present invention is applicable to the technical field of glass sand transportation, and provides a transportation device and a transportation method for glass sand wet regeneration system treatment, including a receiving and reciprocating component and an anti-piling and separating component; the receiving and reciprocating component includes a reciprocating cylinder, a reciprocating bar, a reciprocating plate, a first fixing plate, a second fixing plate, and a collecting member; the anti-piling and separating component includes a slide rail, an electric slider, a fixing bar, a driving motor, a driving bar, a movable frame, a movable plate, and a separating member; the reciprocating cylinder pulls the reciprocating bar to first make an upward movement, so that the reciprocating plate drives the wet glass sand to make an upward movement; the telescopic end of the reciprocating cylinder continues to pull, so that the reciprocating bar gradually tilts from the vertical direction and rotates towards the horizontal direction, and will continue to move a certain distance in the horizontal direction; during this process, the reciprocating plate gradually pours the wet glass sand accumulated on the surface to the rear of the vibrating conveyor body that is being conveyed, thereby ensuring the particle size uniformity of the regenerated glass sand, and further improving the use effect of the regenerated glass sand.

The invention relates to the technical field of coal-fired units, and discloses an electrothermal coupling regenerative system for a thermal power unit. The first high-pressure heater and the second high-pressure heater are used for supplying water; the power supply is used for driving the electric heater to perform heating control on feed water in the first high-pressure heater and the second high-pressure heater; the steam electric shut-off valve is used for controlling opening and closing of the valve; the control device is electrically connected to the power source and the electric heater and used for managing and controlling the power source and the electric heater, new energy surplus electricity or off-peak electricity is used for heating feedwater of the heat regeneration system, the feedwater temperature is increased, the fire coal amount is reduced, the transformation investment and the safety risk are greatly reduced, and the energy consumption is reduced. The coupling with the coal power unit can reduce the minimum power generation load of the unit and improve the variable load rate.

The application discloses a power plant start-up stage feedwater heating energy-saving operation method, which is applied to a self-adaptive feedwater regenerative system in a thermal power plant; the self-adaptive feedwater regenerative system comprises a high-pressure heater group and a bypass steam supply branch; the bypass steam supply branch is respectively communicated with a condenser in the thermal power plant and a steam side of at least one high-pressure heater in the high-pressure heater group; during the start-up stage of the thermal power plant, the pressure value change of main steam is acquired and monitored in real time, so as to judge whether the pressure value is in a preset operation range; if yes, the bypass steam supply branch is opened, part of the main steam is introduced into the steam side of the at least one high-pressure heater in the high-pressure heater group, the feedwater flowing through the water side of the high-pressure heater is heated, and meanwhile, the remaining part of the main steam is introduced into the condenser; after the thermal power plant meets preset normal operation conditions, the bypass steam supply branch is closed, and a normal feedwater heating mode is switched synchronously.

The steam turbine intermediate exhaust industrial heat supply system comprises an intermediate-pressure cylinder, a low-pressure cylinder and a communicating pipe connecting a steam exhaust port of the intermediate-pressure cylinder and a steam inlet of the low-pressure cylinder, and a steam extraction port of the intermediate-pressure cylinder is connected with a deaerator and a low-pressure heat regeneration system in parallel through a steam extraction pipeline; a first butterfly valve and a second butterfly valve are respectively arranged on the communicating pipe close to the steam exhaust port of the medium-pressure cylinder and the steam inlet of the low-pressure cylinder; a small steam turbine steam inlet of a small steam turbine of the low-pressure regenerative system is connected with a first steam taking branch of a steam taking pipeline, and a steam inlet adjusting valve is arranged on the first steam taking branch. A steam exhaust port of the small steam turbine is connected with one end, close to a steam inlet of the low-pressure cylinder, of the communicating pipe and a low-pressure last-stage low-pressure heating extraction port of the low-pressure cylinder in parallel through a steam exhaust pipeline. The method has the advantage that it can be guaranteed that the external heat supply capacity or the deep adjustment amplitude of the unit is not reduced; meanwhile, the device has the advantages of reducing steam exciting force, reducing vibration of a communicating pipe, a low-pressure cooling bypass and a cylinder and guaranteeing safe operation of a unit.

To provide a zinc fuel which can be manufactured by regeneration of zinc oxide, is easy to handle and store, and is easy to secure contact with a current collector, and to provide its manufacturing method.SOLUTION: The zinc fuel 2 has a support 3 whose surface is formed by a current collector 5, and a negative electrode active material layer 4 covering the surface of the support 3. The negative electrode active material layer 4 is a generated zinc layer formed by dendritic crystals of zinc or a zinc alloy deposited on the surface of the support 3, in which some of the dendritic crystals are crushed and densified, and voids are provided between the crushed dendritic crystals. For example, a long sheet 6 is used as the support 3, and the sheet 6 is immersed in the zinc deposition bath 21 to deposit dendritic crystals on the surface by electrolysis of zinc oxide. The sheet 6 is drawn out from the zinc deposition tank 21, and after a negative electrode active material layer 4 is formed by densifying the generated zinc layer by a press mechanism 23, it is wound in a roll shape to manufacture the zinc fuel 2.SELECTED DRAWING: Figure 4

The invention discloses a coal-fired power plant quick response system and method based on thermochemical energy storage, which are applied to the field of power grid energy storage and comprise a coal-fired power generation unit, a carbon capture unit, an energy storage unit and a power generation unit. The coal-fired power generation unit comprises a boiler, a steam turbine, a power generator and a regenerative system; the carbon capture unit comprises an absorption tower, a separation tower and a reboiler; the energy storage unit comprises a dry air pump, an air heater and a thermochemical energy storage reactor. The medium-pressure cylinder is connected with the air heater through steam extraction, the low-pressure cylinder is connected with the inlet of the reactor through steam extraction, and steam at the outlet of the reactor is supplied to the reboiler and the organic Rankine cycle power generation unit. Waste heat of a cooler of the carbon capture unit is recycled and used for preheating organic working media, and energy gradient utilization and rapid peak regulation are achieved. According to the invention, an energy storage-energy release bidirectional operation mechanism is constructed through the thermochemical energy storage unit, the problems of output reduction and slow response during peak regulation of the carbon capture power plant are solved, more steam is used for power generation, the peak regulation range is widened, and the response rate is improved.

The utility model discloses an efficient waste gas treatment vertical tank device based on resin particles, which comprises a stainless steel vertical tank, an exhaust pipe is fixedly mounted at the top of the stainless steel vertical tank, a waste gas pipe is fixedly mounted on the left side of the stainless steel vertical tank, and three mounting rings are fixedly mounted in the stainless steel vertical tank. The three installation rings are located between an exhaust pipe and a waste gas pipe, annular flow guide grid plates are fixedly installed on the three installation rings through bolts, recovery hoppers are inserted into the two annular flow guide grid plates at the bottom in a penetrating mode, a condensation recovery pipe is fixedly installed at the bottom of the stainless steel vertical tank, and a high-temperature steam pipe is arranged on the right side of the stainless steel vertical tank. According to the utility model, harmful substances are adsorbed by the resin adsorption layer, and after multi-layer adsorption treatment, waste gas reaches the standard and is exhausted through the exhaust pipe, so that a resin adsorption filtration and regeneration system is formed, peculiar smell, harmful substances and organic matters in the waste gas can be efficiently adsorbed and removed, and the treatment effect of the waste gas is ensured.

This invention provides a catalyst regeneration energy recovery heat pump system, belonging to the field of heat pump technology. An external air channel connects to a coke-regeneration system via a heat source regenerator. The coke-regeneration system has a flue gas channel connecting to the outside via a high-temperature heat exchanger and a heat source regenerator. An external gas channel connects to a compressor, a high-temperature heat exchanger, a high-temperature expander, a high-temperature steam generator, and a low-temperature steam generator. A heater connects to the low-temperature steam generator via a booster pump. The heater connects to an evaporator via a throttling valve. The evaporator connects to the low-pressure port of an ejector. The low-temperature steam generator connects to the high-pressure port of an ejector. The ejector connects to the heater via a second compressor. An external liquid medium pipeline connects to the high-pressure port of a second ejector via a second booster pump and a high-temperature steam generator. An external heated medium channel connects to the low-pressure port of the second ejector via the heater. The second ejector connects to the outside. The evaporator also has a low-temperature heat medium channel connecting to the outside, forming a catalyst regeneration energy recovery heat pump system.

The invention provides a steam heat storage system of a coupling coal power unit and a capacity determination method, and belongs to the technical field of coupling heat storage systems of coal power units. The coal power unit in the steam heat storage system coupled with the coal power unit comprises a boiler and a steam turbine unit; the coal power unit further comprises a regenerative system. The inlet end of the regenerative system is connected with the outlet end of the turboset, and the outlet end of the regenerative system is connected with the inlet end of the boiler. A steam-water mixing heater, a low-temperature water storage tank and a high-temperature water storage tank are arranged in the steam heat storage system of the coupling coal power unit. A steam inlet of the steam-water mixing heater is connected with the turboset, a water inlet of the steam-water mixing heater is connected with an outlet of the low-temperature water storage tank, and a water outlet of the steam-water mixing heater is connected with an inlet of the high-temperature water storage tank. An inlet of the low-temperature water storage tank and an outlet of the high-temperature water storage tank are both connected with a condensed water outlet of the heat regeneration system. The problem that potential safety hazards exist due to the fact that the deep peak regulation capacity is insufficient in the prior art is solved.

The invention discloses a steam turbine low-pressure inner cylinder with a multi-stage steam extraction opening structure, and belongs to the technical field of thermal power steam turbines. According to the low-pressure inner cylinder, through the asymmetric combination design of a steam turbine side partition plate holding ring and a motor side partition plate holding ring, a first-stage partition plate holding ring is independently arranged on the steam turbine side, a second-stage partition plate holding ring and a third-stage partition plate holding ring are integrated, the first-stage partition plate holding ring and the second-stage partition plate holding ring are integrated on the motor side, the third-stage partition plate holding ring is independently arranged on the motor side, and a fourth-stage steam extraction opening is integrated on the single inner cylinder in cooperation with a fourth-stage partition plate holding ring which is symmetrically arranged; the steam extraction pipes adopt a mode of combining same-side concentration and diagonal distribution, so that the degree of asymmetry of steam extraction is reduced; the problems that a traditional low-pressure inner cylinder structure is not universal, cannot be matched with a low-pressure heater and is uneven in multi-cylinder steam extraction amount are solved, module generalization and compact arrangement of a steam extraction cavity are achieved, the low-pressure inner cylinder structure is suitable for double-cylinder and three-cylinder configuration units, the economical efficiency and reliability of a steam turbine regenerative system are remarkably improved, and the manufacturing and maintenance cost is reduced.

The invention discloses a waste oil distillation regeneration system and method based on internal heating and internal circulation, and belongs to the technical field of waste oil regeneration treatment. The system comprises a distiller, a vacuum system, a condensation collection system, an electromagnetic heating device and a double stirring device. The electromagnetic heating device directly heats the distiller tank body through induction heating, and the heat efficiency reaches 90%-98%; the double-stirring device is composed of an outer-layer low-speed stirrer and an inner-layer high-speed stirrer, a forced internal circulation flow field is formed, heat transfer is enhanced, coking is prevented, it is ensured that the temperature of raw oil is uniform, and the overall temperature gradient is controlled within + / -0.5 DEG C. According to the method, through cooperative operation of vacuum pressure reduction, electromagnetic heating and internal circulation, efficient distillation is achieved, the yield of the base oil is remarkably increased, and energy consumption and operation cost are reduced. The system structure is simplified, traditional boilers and external pipelines are omitted, the stability and safety are greatly improved, the occupied area of equipment is small, the maintenance cost is low, and both environmental protection and economic benefits are achieved.

The present invention discloses an energy-saving system for a thermal power plant, a method for deep utilization of waste heat thereof, and an operation method. The system includes: a boiler that provides thermal energy for the thermal power plant; a high-temperature steam discharge pipe and a flue gas discharge pipe are provided on the boiler, and a steam turbine generator set is connected to the high-temperature steam discharge pipe; a steam outlet end of the steam turbine generator set is connected to the boiler through a circulation loop; a flue gas waste heat deep recovery and energy storage system that is used to receive part of the flue gas discharged from the boiler, recover the heat of the flue gas, and store it; a regenerative system that uses the heat stored in the flue gas waste heat deep recovery and energy storage system to heat the medium in the circulation loop; a photovoltaic heat pump condensate waste heat recovery system that recovers the waste heat in the circulation loop and stores the recovered heat in the flue gas waste heat deep recovery and energy storage system. Starting from the perspective of deep utilization of waste heat, the present invention combines energy storage technology, renewable energy technology, and heat pump technology, greatly improving the waste heat utilization level of the thermal power plant.

The utility model discloses a coal-fired unit rapid and flexible peak and frequency regulation system based on high-temperature working medium energy storage / supply, which relates to the field of conventional power generation technology and energy storage technology and comprises a coal-fired unit thermodynamic cycle system and a high-temperature furnace water energy storage / supply system, the high-temperature furnace water storage and supply / energy system is deeply coupled with the coal-fired unit thermodynamic cycle system, and the power capability and the power generation load of the coal-fired unit are quickly improved by reducing the steam extraction amount of each stage of a steam turbine in the coal-fired unit thermodynamic cycle system, so that the climbing rate of the coal-fired unit is improved; and meanwhile, through direct cooperative energy supply of the high-temperature boiler water storage / energy supply system, the high-enthalpy-value working medium stored by the high-temperature boiler water storage / energy supply system heats boiler feed water in the regenerative system, the temperature of the boiler feed water is increased, then the boiler steam yield is increased, and the rapid variable load response capacity of the coal-fired unit is improved.

The application provides a flexible regenerative system and method for improving the variable load rate of a coal-fired power generating unit, and belongs to the field of heat storage peak regulation. The system comprises a steam turbine, a generator, a condenser, a steam extraction pipeline, an exhaust steam pipeline, a first regenerative unit, a heat storage tank, a sprayer, a spray water pipeline and a boiler. The generator is connected to the steam turbine, the inlet of the steam turbine is connected to the outlet of the boiler, the first outlet of the steam turbine is connected to the first inlet of the first regenerative unit through the steam extraction pipeline, the condenser is arranged between the second outlet of the steam turbine and the second inlet of the first regenerative unit, and the outlet of the first regenerative unit is connected to the inlet of the boiler. The sprayer is arranged in the heat storage tank, the spray water pipeline is connected to the sprayer, the inlet of the heat storage tank is connected to the first outlet of the steam turbine, and the first outlet of the heat storage tank is connected to the first inlet of the first regenerative unit. Through the system provided by the application, the deep peak regulation capacity and the rapid variable load capacity of the steam turbine generator unit can be further improved.