595 results about "Deaerator" patented technology

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

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

The invention belongs to the technical field of fused salt energy storage, and particularly relates to a thermal power generating unit deep peak shaving system and method of a fused salt heat storage coupling high-temperature heat pump. In the high-generation time period of renewable energy sources, the load of a thermal power generating unit needs to be reduced, at the moment, a boiler operates at the lowest stable combustion load, a fused salt heat storage system is added, all main steam is extracted to enter the heat storage system to heat fused salt, a high-pressure cylinder of a steam turbine is stopped, and an intermediate-pressure cylinder and a low-pressure cylinder of the steam turbine operate under the low-load working condition; the output load of the unit only meets the plant power, and the load is not output to the power grid; in the load rising time period, heat stored by the fused salt heat storage system is used for generating steam in the unit load rising stage to increase the unit steam turbine load rising rate and peak power generation; the problems of operation safety and low energy grade in the unit peak regulation process are solved. In the peak period of electricity utilization, heat stored in the fused salt heat storage system is released into the unit, and the output load of the unit is rapidly increased. An outlet of the deaerator serves as a water taking point, part of supplied water is extracted to pass through the preheater, the evaporator and the superheater to generate high-temperature and high-pressure steam, the high-temperature and high-pressure steam enters a high-pressure cylinder of the steam turbine to do work, and therefore the output load of the steam turbine is rapidly increased. The invention provides a thermal power generating unit deep peak regulation system and method of a fused salt heat storage coupling high-temperature heat pump, and aims to realize deep peak regulation of a unit and power generation by absorbing renewable energy sources such as wind and light.

The invention provides a steam turbine generator unit feed pump net positive suction head detection system and method, relates to the technical field of net positive suction detection, and solves the technical problem that net positive suction is difficult to recognize in advance in the prior art. The system specifically comprises a temperature acquisition module used for acquiring the temperature of the deaerator; the judgment and early warning module is used for receiving the flow change rate of the feed pump and triggering alarm when the flow change rate exceeds a flow threshold value; the effective net positive suction head calculation module is used for converting the inlet pressure of the water feeding pump into absolute pressure; temperature correction is conducted on the temperature of the deaerator to obtain the saturation temperature of an inlet of the water feeding pump, the saturation temperature is converted into saturated vapor pressure, and the effective net positive suction head is calculated based on the absolute pressure and the saturated vapor pressure; the necessary net positive suction head obtaining module is used for calling the necessary net positive suction head table and calculating and obtaining the necessary net positive suction head; and the net positive suction head calculation module is used for receiving the effective net positive suction head and the necessary net positive suction head and calculating the net positive suction head. The device is used for detecting the net positive suction head.

An oil supply system, has: an oil tank; a closed-loop oil circuit including a component, a pump having a pump inlet and a pump outlet, and a de-aerator; a make-up flow conduit connecting the oil tank to the closed-loop oil circuit; a make-up pump connected to the closed-loop oil circuit; a recirculation conduit in parallel to the make-up pump and bypassing the make-up pump; a fixed orifice fluidly connected to the make-up flow conduit upstream of the closed-loop oil circuit and downstream of the recirculation conduit, the fixed orifice having an area selected to increase a pressure at an outlet of the make-up pump above a pressure at the de-aerator inlet; and a metering orifice connected on the recirculation conduit and having a flow circulating area selected to reduce a flow rate inputted into the closed-loop oil circuit below a flow rate generated by the make-up pump.

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

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

The invention belongs to the technical field of thermal power generation, and particularly relates to a feed pump recirculation system for preventing cavitation of a minimum flow valve of a thermal power generating unit. The feed pump recirculation system comprises a condenser, a condensate pump, a low-pressure heat regenerator set, a deaerator, a feed pump and a high-pressure heat regenerator set which are sequentially connected, each stage of extraction steam of an external steam turbine is connected with steam inlets of the high-pressure heat regenerator set, the deaerator and the low-pressure heat regenerator set, and a condensate outlet of the high-pressure heat regenerator set is connected with a condensate inlet of the deaerator. A condensed water outlet of the low-pressure heat regenerator set is connected with a condensed water inlet of the condenser, the water feeding pump sequentially passes through the minimum flow valve, the heat exchanger and the first stop valve and is connected with the deaerator, and external cooling water enters the heat exchanger through the third stop valve for heat exchange and then is discharged. The return water temperature of the feed pump recirculation system is reduced through the heat exchanger, the saturated steam pressure corresponding to the return water is reduced, the cavitation risk of the minimum flow valve is reduced, and the service condition of the minimum flow valve can be obviously improved.

The utility model relates to a calcined coke waste heat utilization system, and belongs to the technical field of waste heat recovery. The device comprises a first-stage cooler, a second-stage cooler, a waste heat lifting device and a deaerator, and calcined coke is cooled and output sequentially through the first-stage cooler and the second-stage cooler; the first-stage cooling pipe is communicated with the heating medium pipe to form a circulating pipeline, and external softened water is communicated with a second deoxidizing inlet of the deaerator through a first refrigerant pipe; external softened water is connected with an inlet of the second-stage cooling pipe through a second refrigerant pipe, an outlet of the second-stage cooling pipe communicates with a first inlet of the deaerator, and an outlet of the deaerator conveys high-temperature water to the outside. The system is simple in structure, waste heat of calcined coke can be recycled more sufficiently, energy waste is avoided, steam can be heated by the recycled waste heat of the calcined coke, steam cost is reduced, energy is saved, the system is stable and reliable, calcined coke materials with the temperature below 100 DEG C can be output, and energy is saved. And the discharge temperature of the calcined coke is low, so that the requirement on the cooling temperature of the calcined coke material can be met.

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

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

The application discloses an absorbent tower external regeneration and oxygen removal method and system, and the method comprises the following steps: 1) the lean liquid from the bottom of the regeneration tower enters a negative pressure buffer tank, the top of the negative pressure buffer tank is connected with a steam compressor, the lean liquid extracted by the steam compressor enters a lean-liquid rich-liquid heat exchanger through a lean-liquid pump; 2) water vapor containing a small amount of CO2 enters the steam compressor, enters a regeneration oxygen remover after being adjusted by an adjusting valve I; 3) the rich liquid enters the top of the regeneration oxygen remover from top to bottom after being discharged from the lean-liquid rich-liquid heat exchanger, and steam enters the regeneration oxygen remover from bottom to top; 4) the rich liquid enters the regeneration tower from the top after being regenerated and stripped by heating; 5) the regeneration gas I after completing the heating regeneration and stripping of the rich liquid and the regeneration gas II discharged from the top of the regeneration tower enter a gas-liquid separator after passing through a gas cooler, the separated condensed water returns to the regeneration tower from the top, and the separated gas enters a membrane separation device after being compressed by a CO2 compressor. The method reduces the energy consumption of the system and realizes the cooperation of oxygen removal and energy saving.

An air source heat pump and steam boiler combined heat supply system comprises a water treatment system, an air source heat pump, a deaerator, a steam boiler and an induced draft fan, the water treatment system used for desalting and softening water is connected with the water inlet end of the air source heat pump, and the water outlet end of the air source heat pump is connected with the water inlet end of the steam boiler through the deaerator. The air outlet end of the steam boiler is connected with the air inlet end of the air source heat pump. The heat supply system is simple in structure, convenient to operate, flexible and practical, the air source heat pump is embedded in an existing mature steam boiler heat supply system, the waste heat of the smoke at the tail of the steam boiler is further recycled, the overall heat efficiency of the heat supply system is improved, and the heat supply cost is reduced.

The utility model belongs to the technical field of dry quenching waste heat power generation, and particularly relates to a dry quenching waste heat power generation deoxygenization water supply system. Comprising EDI (electrodeionization) equipment, a steam extraction condensing steam turbine or a pure condensing steam turbine, a condenser, a condensate pump, a demineralized water tank of a dry quenching boiler water supply pump station, a deoxygenization water supply pump, a deoxygenization water supply regulating valve group, a three-way valve, a water-water heat exchanger, a water supply preheater and a thermal deaerator. The utility model has the beneficial effects that a desalting water tank and a secondary desalting water pump of a desalting water station are omitted; the fixed pressure difference of the regulating valve is used as main regulation, and the three-way valve is used as auxiliary regulation to ensure normal operation of sampling equipment; after deoxygenated water supply is heated by the water-water heat exchanger, one part of sewage is fed into the dry quenching body circulating water tank for normal production, and the other part of sewage is fed back to a sewage discharge well, so that the temperature of the sewage is reduced, heat and water resources are fully utilized, and meanwhile, the adverse effect of white smoke generated by sewage discharge on a drainage system and the environment is eliminated.

The utility model discloses a thermal deaerator which comprises a base, the top of the base is fixedly connected with a supporting block, the top of the supporting block is fixedly connected with a first tank body, the bottom of the first tank body is fixedly connected with a water outlet pipe, and the interior of the water outlet pipe is fixedly connected with a first filter screen. A second filter screen is fixedly connected to the interior of the water outlet pipe, a water passing plate is fixedly connected to the interior of the water outlet pipe, a rotating shaft is rotatably connected to the top of the water passing plate, and a plurality of blades are fixedly connected to the exterior of the rotating shaft. By means of the structure, impurities in water are smashed, then under driving of a second motor, a second driving rod is matched to drive a limiting round block in a fixing block to move from a groove in the fixing block, water is discharged, and therefore it is guaranteed that deoxygenated water can be smoothly conveyed to a follow-up system; normal operation of the thermal deaerator and the whole thermal system is maintained, and system faults and shutdown maintenance caused by pipeline blockage are avoided.

The digital intelligent zinc powder capturing system comprises an annealing furnace and a circulating pipeline, one end of the circulating pipeline is connected with the upper portion of the annealing furnace, the other end of the circulating pipeline is connected with the lower portion of the annealing furnace, and a furnace gas buffer tank, a circulating frequency conversion fan, a dryer, a deaerator and a heater are sequentially connected to the circulating pipeline in series. A temperature detection galvanic couple is arranged at the gas inlet end of the furnace gas buffer tank, a temperature detection galvanic couple is arranged between the zinc powder catcher and the zinc powder concentration checker B, and a temperature detection galvanic couple, a micro-aerobic analyzer and a dew point analyzer are sequentially arranged on the circulating pipeline at the outlet end of the heater. And the furnace gas is treated through the furnace gas buffer tank, the circulating frequency conversion fan, the zinc powder catcher, the zinc powder concentration detector A, the zinc powder concentration detector B, the dryer, the deaerator and the heater on the circulating pipeline, so that the zinc powder in the annealing furnace can be effectively eliminated, and the product yield can be effectively improved.

The utility model discloses a novel tower-free rotating film tubular deaerator which comprises a deoxidizing tank, supporting columns are symmetrically arranged at the bottom end of the deoxidizing tank, a fixing plate is arranged at the bottom ends of the supporting columns, a filter box communicated with the deoxidizing tank is arranged on one side of the top end of the deoxidizing tank, a filter assembly is arranged in the filter box, and a water outlet is formed in the other side of the deoxidizing tank. A water inlet pipe communicated with the filter box is arranged at the top end of the filter box, an exhaust port is formed in the side, away from the filter box, of the top end of the deoxidizing tank, a water outlet pipe is arranged at the bottom end of the deoxidizing tank and located between the two supporting columns, and a softened water inlet is formed in one side of the deoxidizing tank. The device has the beneficial effects that water entering the deoxidizing tank can be subjected to impurity filtering by arranging the filtering assembly, impurities are prevented from entering the deoxidizing tank to affect the deoxidizing efficiency of the deoxidizing tank, a limiting assembly in the filtering assembly can facilitate replacement and cleaning of a filter cylinder in a filtering box, and the device is more convenient to use.

The utility model discloses an air-steam heater with a dead steam recovery device for a boiler, which comprises a heater cylinder, an air inlet and an air outlet are respectively arranged at two ends of the heater cylinder, and an input end of a heat exchange tube bundle in the heater cylinder is connected with a high-temperature and high-pressure steam input tube. A heat exchange discharge pipe at the output end of the heat exchange pipe bundle is connected with a dead steam conveying pipe and a condensate water conveying pipe, the dead steam conveying pipe is connected with a steam-water recovery device, and the steam-water recovery device comprises a condensation mechanism and a steam-water recovery device output pipe; the condensate water conveying pipe is connected to a condensate water recycling barrel, a recycling barrel condensate water output pipe is arranged on the condensate water recycling barrel, the recycling barrel condensate water output pipe is connected with a condensate water conveying pump, and the condensate water conveying pump is connected to a deaerator through a delivery pipe; an output pipe of the steam-water recycling device is connected to the condensate water recycling barrel. The waste steam and condensate water recycling device has the advantages that the waste steam and the condensate water are recycled, so that water resources can be greatly saved, and the operation cost of the boiler is effectively reduced.

The present application relates to a kind of thermal power generating unit control technical field, is a kind of thermal power generating unit condensate pump automatic control system energy-saving optimization method and device, the former includes determining by deaerator water regulating valve control condensate pump outlet header pressure, then judge deaerator water regulating valve whether full open;In response to no, reduce condensate pump outlet header pressure set value, until deaerator water regulating valve full open;In response to yes, judge current deaerator water regulating valve opening degree whether with condensate pump energy-saving operation match;In response to no, increase condensate pump outlet header pressure set value, until current deaerator water regulating valve opening degree with condensate pump energy-saving operation match.The present application is by lifting the opening degree of deaerator water regulating valve, reduce the throttling loss caused by deaerator water regulating valve opening degree low, simultaneously make the throttling loss of deaerator water regulating valve minimum and condensate pump outlet header pressure maximum, in reducing energy loss while guaranteeing the economy of condensate pump operation.

The present invention discloses a coke oven raw gas waste heat recovery and utilization device, comprising a raw gas system and a steam-water system. The raw gas system comprises coke oven raw gas, a riser heat exchanger and an ammonia water spraying device. The raw gas flows through the inner cylinder of the riser heat exchanger through heat exchange and then enters the top pipe. The top pipe is connected to the ammonia water spraying device. The high-temperature and high-pressure water in the riser heat exchanger enters the steam-water system through a pipe. The steam-water system comprises a steam drum, a desalted water tank, a deaerator, a deaerator feed water pump, a steam drum feed water pump and a forced circulation pump that are interconnected. The process flow of the present invention is simple and reasonable, with automatic control and high safety. The riser heat exchanger has a simple structure, solves the problem of "fear of coking and blocking the riser", and has the ability to prevent "fear of dry burning and repeated water on and off". The double steam drum technology avoids dry burning of the riser heat exchanger, extends the service life of the riser heat exchanger, and ensures that saturated steam will not be interrupted.

The invention relates to the technical field of gas-fired boiler steam drums, and discloses a gas-fired boiler low-pressure steam drum deaerator emptying control device which comprises two oxygen content monitoring devices, namely a first oxygen content monitoring device and a second oxygen content monitoring device, the first oxygen content monitoring device is installed at an outlet of a deaerator emptying pipeline, and the second oxygen content monitoring device is installed at an outlet of a deaerator emptying pipeline. The second oxygen content monitoring device is mounted at an inlet of an emptying pipeline of the deaerator; the control device further comprises a flow monitoring device installed in the emptying pipeline of the deaerator, an emptying door opening adjusting device installed on the emptying door and a controller. The controller receives numerical values measured by the first oxygen content monitoring device, the second oxygen content monitoring device and the flow monitoring device, calculates the numerical values and then controls the emptying door opening degree adjusting device to adjust the opening degree of the emptying door in real time; according to the method, the opening degree of the emptying door is adjusted in real time by combining actual parameter conditions in the emptying pipeline, and the method has the advantages that the emptying amount is set more accurately and reasonably, unnecessary emission is reduced, and resources are saved.

The application belongs to the technical field of disc-shaped nozzles, and particularly relates to a two-phase nozzle device for a lance-type deaerator. The existing multi-layer disc-shaped nozzle jetting port seriously affects the heat exchange effect of liquid droplets and water vapor, and affects the deaeration effect of the entire headless deaerator. The application provides a two-phase nozzle device for a lance-type deaerator, which comprises a nozzle main body connected with an annular disc assembly. The nozzle main body comprises a liquid cavity and a breather pipe body connected with each other from inside to outside. A gas cavity is arranged in the breather pipe body. An air inlet pipe is arranged on the breather pipe body. The annular disc assembly comprises a plurality of annular discs. A disc cavity is arranged in each annular disc. A plurality of air holes are arranged on the breather pipe body and correspond to the annular disc assembly. A plurality of liquid holes are arranged on the liquid cavity and are in communication with the disc cavities. The preliminary deaeration efficiency of the headless deaerator is effectively improved.

The application discloses a kind of gasification deaerator venting steam recovery device, it is related to the field of deaerator, including tank body, the tank body is provided with a plurality of partition, the tank body is sealed and is provided with water injection chamber, and steam chamber is located in the bottom of water injection chamber, the tank body is provided with permeation cylinder, a plurality of through holes are inclined and arranged on the permeation cylinder, the top of the permeation cylinder is rotatably installed with impeller, and the bottom end of impeller is connected with water disc, the tank body is installed with packing layer.The application is injected into steam chamber under the action of first steam port, so that cooling water is mixed with steam and heated, and the water source flowing out of the permeation cylinder is evenly dispersed on the top of the packing layer by the water disc, and the non-condensable gas after being deoxidized by steam and the packing layer flows into the sealing cylinder under the action of exhaust fan blades, which can prevent the non-condensable gas from contacting the cooling water to be deoxidized again during the process, effectively improving the overall deoxidizing effect.

The invention provides a thermal deoxidization performance experiment system suitable for a negative pressure environment, which belongs to the technical field of thermal waterpower and comprises a condensate tank, a deaerator, a cooling heat exchanger, a cooling water tank, a vacuum tank, a flow measurement system, a pressure measurement system and a temperature measurement system. The condensate tank is connected with the deoxidizing loop, the cooling water tank is connected with the cooling loop, the deaerator is connected with the sampling pipeline, the cooling water tank is connected with the water replenishing pipeline, and the condensate tank is connected with the water draining pipeline; the deoxidizing loop is used for heating and deoxidizing the condensate water in the deoxidizing water tank; the cooling loop cools the heated water to prevent the condensate pump from cavitation; the sampling loop is used for sampling the liquid before and after oxygen removal and measuring the oxygen content of the liquid; the water replenishing loop is used for filling the deoxidizing loop with water before an experiment is carried out; and the drainage loop is used for draining water in the deoxidizing loop after the experiment is finished. The experimental system provided by the invention realizes the functions of negative pressure oxygen removal environment, oxygen content on-line measurement and continuous operation of the system.

The utility model discloses a waste incineration plant low-pressure heater heat exchange system which comprises a steam turbine, a low-pressure heater and a condenser, the steam turbine is connected with a steam inlet chamber of the condenser through a steam exhaust pipeline, the steam turbine is connected with a steam side inlet of the low-pressure heater through a steam extraction pipeline, and a steam side outlet of the low-pressure heater is connected with the condenser through a drainage pipeline. The condenser is connected with a water side inlet of the low-pressure heater through a first condensation water pipeline, and a condensation water pump is arranged on the first condensation water pipeline. A water side outlet of the low-pressure heater is connected with the deaerator through a second condensation water pipeline, a steam side outlet of the low-pressure heater is connected with the second condensation water pipeline through a drainage recovery pipeline, and a low-pressure heater drainage pump is arranged on the drainage recovery pipeline. The drain water can be prevented from being recycled to the condenser repeatedly, the temperature of the drain water is prevented from being reduced, the working pressure of the condenser is prevented from being influenced, and heat economy is effectively improved.

The application discloses a layered collaborative control method for auxiliary deaerator pressure stabilization of a molten salt steam generator, builds an auxiliary optimization control layer on the original coordination control system of the unit, and forms a layered collaborative architecture of "MPC optimization decision-CCS execution tracking". The upper layer calculates and rolls over the optimal set values of the molten salt steam pressure, the deaerator pressure and the feedwater temperature in real time based on model predictive control (MPC); the lower layer realizes fast and stable tracking of the set values through three control loops of cascade-ratio control, three-impulse collaborative control and PID control embedded in CCS, and is seamlessly coordinated with the original feedwater and combustion control logic of the unit. The application effectively solves the problems of multivariable strong coupling, large response inertia and strong mode switching impact of the coal-molten salt coupling system in deep load regulation, significantly improves the load response speed, operation safety and low-load economy of the unit, and enhances the accommodation capacity of the power system to new energy.

The present application relates to a kind of nuclear power plant DCS control system, including signal acquisition unit and main control room operating platform, main control room operating platform includes the control rod control system interface operating module of intermediate variable display in control rod control system;Feedwater deaerator system interface operating module for the intermediate variable display of feedwater deaerator system;Main feedwater system interface operating module for the intermediate variable display of main feedwater system;Turbine bypass discharge system interface operating module for the intermediate variable display of turbine bypass discharge system;Output link's reactor core margin calculation system operating interface link module;Chemical volume control system interface operating module for the intermediate variable display of chemical volume control system;Boron and water supply system interface operating module for the intermediate variable display of boron and water supply system.The present application can assist operator to make judgment and intervention in advance to system state by increasing intermediate variable display;More intuitively master system state, reduce human error.

The utility model belongs to the field of chemical engineering, and particularly relates to a water inlet system of a deaerator. The water inlet system of the deaerator comprises a flash tank used for carrying out flash evaporation on first fluid to obtain second fluid, and the first fluid is high-pressure condensate, medium-pressure condensate or a mixture of the high-pressure condensate and the medium-pressure condensate; the condensate refining system is used for purifying third fluid to obtain fourth fluid, and the third fluid is low-pressure condensate, compressor turbine condensate or a mixture of the low-pressure condensate and the compressor turbine condensate; the heat exchanger is used for conducting heat exchange on the second fluid and the fourth fluid, and the second fluid and the fourth fluid are converted into fifth fluid and sixth fluid correspondingly; the liquid level adjusting valve is used for reducing the pressure of the fifth fluid to obtain seventh fluid; and the deaerator is used for deoxidizing the seventh fluid and the sixth fluid. According to the water inlet system of the deaerator, the heat exchanger is additionally arranged in front of the liquid level adjusting valve, on the premise that no extra energy is consumed, saturated high-pressure and medium-pressure condensate is converted into over-condensate, and meanwhile low-pressure condensate after heat exchange and condensation of a turbine of the compressor are still in an over-cooling state. According to the utility model, the vaporization rate of fluid throttled by the liquid level regulating valve is greatly reduced, and the problems of thinning, even perforation and failure caused by two-phase flow erosion of the water inlet pipeline of the deaerator are relieved.

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.

According to the condensed water heating device, the heat pump is arranged to utilize heat in circulating cooling water after heat exchange with steam in the condenser, low-grade heat in the circulating cooling water is converted into high-grade heat, and the generated high-grade heat and condensed water output by the condenser are subjected to heat exchange in the heat exchanger; the condensed water is preheated and then input into a deaerator to be deoxygenated, and then the deoxygenated and heated condensed water is heated to the preset temperature through a heater and then introduced into a boiler to be recycled. According to the device, through the arrangement of the heat pump, heat in circulating cooling water is recycled to be used for heating steam condensation water, and the defects that in a traditional condensation water system, due to the fact that the supercooling degree of the condensation water is too large, boiler fuel consumption is too high, and the oxygen content in the condensation water is too high, and a pipeline is prone to being corroded are overcome. In addition, heat in circulating water can be utilized by arranging the heat pump, and the advantage of saving energy is achieved.