523 results about "Steam temperature" patented technology

The invention relates to the technical field of electric power automation control, and discloses a coordinated control system for a generator set, which adopts an intelligent DCS integrated design architecture and performs real-time data interaction with a set decentralized control system through hard wiring or a communication protocol. According to the system, through deep fusion of a model prediction control algorithm and intelligent DCS integrated design, a boiler-steam turbine dynamic coordination model is constructed, and a control instruction is generated in real time in combination with a rolling optimization strategy. By means of the design, the main steam pressure deviation is controlled within + / -0.2 MPa, and the load response rate reaches 1.5% Pe / s and is improved by more than 40% compared with a traditional system. Particularly, under the working condition of deep peak regulation, by means of decoupling control over a fuel-air supply-water supply loop through a neural network algorithm, main steam temperature fluctuation (within + / -5 DEG C) and reheater spray desuperheating water quantity sudden change (the change rate is smaller than or equal to 10 t / min) are effectively restrained, the control quality of a unit under the conditions of variable loads and variable coal quality is remarkably improved, and the control efficiency of the unit is improved. And the high-standard requirement of the power grid on the AGC performance is met.

The invention relates to the technical field of control regulation, in particular to a supercritical unit variable load rate dynamic compensation control method, which comprises the following steps: acquiring unit operation data, performing credibility restoration, and outputting a credible parameter set; a time sequence mapping table is constructed based on the credible data, and boiler heat storage lag time, steam turbine control valve delay and a steam temperature interstage coupling coefficient are quantified; correcting the boiler water supply feedforward instruction by using the heat storage lag time to generate a compensated water supply instruction; according to the time sequence mapping table and the main steam pressure change rate, a multi-genetic algorithm is adopted to optimize a control valve constraint rule, and a dynamically constrained control valve action instruction is generated; an inter-stage coupling coefficient is called to generate a swing angle compensation amount, and water spraying temperature reduction disturbance is blocked; safety locking parameters are monitored to trigger buffering intervention in a grading mode, and compensation instructions are integrated to implement cooperative correction. The problem of out-of-step response of multiple execution units under the variable load working condition is solved, and the unit adjusting rate and the control stability are remarkably optimized.

The invention discloses a thermal power generating unit main reheating steam temperature wide-load self-adaptive adjusting method and system, relates to the technical field of electric power industry automation and control, and aims at solving the problems that an existing adjusting method is large in steam temperature fluctuation, high in thermal stress and poor in main reheating collaboration under the wide-load working condition. The method comprises the steps of calculating main steam phase saturation and mapping a target value; calculating the maximum change rate based on the thermal physical parameters of the material, and generating a reference track with the limited change rate; the steam phase saturation of the main steam is used as a phase reference, and the reheated steam is controlled to respond according to a preset phase difference; a combustion system, a flue gas temperature adjusting baffle and a temperature reducing water system are cooperatively controlled; the system comprises a vapor phase saturation processing module, a dynamic boundary generation module, a phase coordination control module, an execution mechanism coordination module, a steady state detection module and a mode switching module. Accurate steam temperature adjustment under the wide load is achieved, material thermal stress is reduced, unit operation safety and economical efficiency are improved, and the variable-load operation requirement of the unit is met.

The invention provides an intelligent temperature control method for a corrugating machine, and belongs to the technical field of corrugated paper products.The intelligent temperature control method comprises the steps that a steam temperature sensor set and a linear speed detection device are installed on a corrugating machine production line, and a speed-steam temperature dynamic compensation mathematical model based on nonlinear regression analysis is established; a feedforward control system architecture is constructed to realize real-time calculation and transmission of a steam temperature compensation value, a double-layer game optimization model is established to coordinate steam energy consumption minimization and composite quality optimization targets, and a self-adaptive adjustment algorithm is started according to composite strength and appearance quality feedback signals to dynamically adjust model parameters. Steam temperature coordination control is implemented to optimize temperature distribution, a steam temperature control effect evaluation system is established for real-time evaluation, and the technical problem that in the prior art, steam temperature dynamic compensation control cannot be achieved according to the speed change of a production line in the production process of the corrugating machine is solved.

The invention relates to the technical field of hot-dip galvanized steel pipe surface treatment, and discloses a hot-dip galvanized steel pipe internal blowing steam electric heating control method and system. The method comprises the steps that the outer diameter, the wall thickness, the surface temperature and steel type information of a galvanized steel pipe are collected, a steam temperature demand value is calculated, the input number and the power duty ratio of sectional type electric heating pipes are dynamically adjusted according to the temperature rise demand, and the heating power is corrected in real time through a cascade closed-loop control system; and calculating the solidification speed of the zinc liquid according to the wall thickness, and processing the thin-walled pipe in a pulse injection mode. The technical problems that in the prior art, steam temperature control precision is insufficient, heating power distribution lacks dynamic adaptation, temperature closed-loop control response lags behind, and a zinc layer on the inner wall of the thin-walled pipe is uneven are solved.

The invention discloses a related quantitative analysis method and system based on steam turbine regulating valve opening disturbance, and belongs to the technical field of generator set optimization operation. Sequentially deducing to obtain a first differential equation and a second differential equation based on the steam temperature change when the steam turbine regulates the valve opening disturbance; the function relation between the enthalpy value of the once-through boiler outlet working medium and the temperature and the pressure is established, and a quantitative analysis equation of the steam turbine adjusting valve opening disturbance to the once-through boiler outlet steam temperature is deduced; based on the proportional relation between the first-stage front steam pressure of the steam turbine and the front steam pressure of the adjusting steam valve and the load constant condition of the once-through boiler, a quantitative analysis equation of the opening disturbance of the adjusting steam valve of the steam turbine to the first-stage front steam pressure of the steam turbine is deduced. Through a reasonable simplified formula, the quantitative influence result of the opening degree change of the steam turbine adjusting valve on the outlet steam temperature of the once-through boiler and the first-stage front steam pressure of the steam turbine can be rapidly and accurately obtained, operation personnel can be assisted in optimizing operation, and then safe and economical operation of a generator set is guaranteed.

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

The invention discloses an oil smoke purifier and an oil discharge control method and an oil discharge structure thereof, and the oil discharge control method comprises the following steps: obtaining real-time liquid level information, when the real-time liquid level information is greater than or equal to a preset working liquid level threshold value, controlling a steam switch valve to be opened at a preset initial opening degree, and setting the duration as a preset first working duration; acquiring the real-time temperature of the oil stain and the real-time temperature of the introduced steam; adjusting the actual working opening degree of a steam switch valve based on the real-time oil stain temperature and the real-time steam temperature; and when the real-time liquid level information is smaller than or equal to the preset low liquid level threshold value, the steam switch valve is controlled to be closed by delaying the preset second working duration. According to the method disclosed by the invention, the heating time and process are accurately controlled, so that the oil discharge channel is effectively prevented from being frozen and blocked by oil stains, and unnecessary energy consumption is reduced.

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 relates to the technical field of honey decrystallization, in particular to an energy-saving honey decrystallization device. According to the technical scheme, the energy-saving honey decrystallization device comprises a steam heating assembly, a steam circulating assembly and a steam input assembly, a steam circulating assembly is arranged at the rear end of the steam heating assembly; high-temperature steam led in from the outside is cooled once through the steam box, the situation that the quality of honey is affected due to the fact that the temperature of the steam is too high is avoided, then the steam enters the steam heating disc along with the feeding pump to be sprayed out upwards, and a honey pot placed above the steam heating disc is heated and dissolved; redundant steam enters the steam circulation bin and then is pumped into the steam circulation bin at the other end through the steam circulation pump, so that steam flow in the steam heating assembly forms stable heating flow, the steam heat utilization efficiency is improved, and energy consumption is reduced.

The invention discloses a GPC-PID cascade control method for a main steam temperature system of a coal-fired unit based on data driving, which is based on a data driving model and is combined with an implicit generalized predictive control algorithm fused with a stepped thought to realize better main steam temperature control. The method comprises two control processes, in the main control process, a compensation instruction of a main steam temperature set value is obtained by establishing a main steam temperature prediction model; secondly, calculating a desuperheater outlet temperature set value instruction increment according to the desuperheater outlet temperature set value at the previous moment, the main steam temperature and the compensated main steam temperature set value through an implicit generalized predictive control algorithm; in the auxiliary control process, a desuperheater control valve opening degree instruction is obtained through PID calculation according to the obtained desuperheater outlet temperature set value instruction and the desuperheater outlet temperature. According to the method, the main steam temperature control effect can be optimized for a main steam temperature control system with strong nonlinearity and uncertainty, and the method has important significance for improving the rapid load changing capacity of a coal-fired unit.

The invention provides a steam turbine quick starting system and method based on low-pressure rotor impulse rotation, belongs to the technical field of steam turbine operation control, and can at least partially solve the problem that the starting time of a steam turbine is long due to the fact that impulse rotation can only be achieved after sufficient cylinder warming during cold state starting in a starting mode adopted by an existing steam turbine set. The system comprises a steam turbine unit, a conveying pipeline assembly, a reheating temperature and pressure reduction system and a main steam temperature and pressure reduction system, and has the beneficial effects that the system adopts a low-pressure cylinder impulse rotation mode, a steam passage can be rapidly established through the reheating temperature and pressure reduction system and the main steam temperature and pressure reduction system at the initial stage of boiler ignition, and early impulse rotation is achieved; the cylinder warming waiting time is shortened, and the overall starting efficiency of the unit is improved.

The invention discloses a range-extended steam conveying system with a temperature and pressure increasing device and an installation method, and relates to the technical field of steam conveying, the range-extended steam conveying system with the temperature and pressure increasing device comprises a steam conveying pipeline and the temperature and pressure increasing device, and the temperature and pressure increasing device is used for increasing temperature and pressure of steam in the steam conveying pipeline. The steam conveying pipeline comprises an inner pipe, an inner heat preservation layer, a heat preservation interlayer, an outer heat preservation layer and a protection layer which are sequentially arranged from inside to outside, and the heat preservation interlayer is of an arc-shaped structure, located on the top of the inner heat preservation layer and used for supporting the outer heat preservation layer. When the pipe diameter of the steam conveying pipeline is selected, the diameter of the steam conveying pipeline can be reduced to the maximum extent, the investment of the steam conveying pipeline is reduced, and the pipe loss of the steam conveying pipeline under low load is reduced; the heat preservation interlayer of the arc structure is additionally arranged, heat dissipation loss of the upper portion of the steam conveying pipeline can be effectively reduced, meanwhile, the outer heat preservation layer is supported by the heat preservation interlayer, the heat preservation performance of the outer heat preservation layer can be improved, and the service life can be prolonged.

The invention discloses a boiler heating surface soot blowing optimization method based on safety and economy analysis, and belongs to the technical field of coal-fired power plant operation optimization. The method comprises the following steps: acquiring historical operation data from a DCS (Distributed Control System), pre-processing the data, establishing an initial data set, determining a real-time ash and dirt coefficient by judging the load stability of a unit and calculating ideal and actual heat exchange coefficients of a heating surface, identifying an ash and dirt growth prediction model and predicting an ash deposition trend. The optimal soot blowing frequency and duration are solved by taking soot blowing net income maximization as a target and combining engineering experience constraints, the critical soot pollution coefficient is calculated, and soot blowing operation is triggered when the actual soot pollution coefficient exceeds the critical value on the premise that safety parameters such as the main reheat steam temperature and the hearth outlet temperature meet the standard. By accurately predicting the soot deposition state and optimizing the soot blowing strategy, energy consumption is reduced while equipment safety is guaranteed, soot blowing medium waste is reduced, and the economical efficiency and safety of boiler unit operation can be remarkably improved.

The invention discloses a low-load flue gas recirculation system for a circulating fluidized bed boiler. The low-load flue gas recirculation system comprises a hearth, and one end of a fifth pipeline is fixedly connected to the hearth; according to the invention, a part of flue gas is led out from the opening of the outlet flue of the induced draft fan and is introduced into the fourth pipeline, primary air heated by the first fan heater and the second fan heater is mixed, then pressurized by the first primary air fan and the second primary air fan and heated by the first preheater and the second preheater, and then enters a boiler air chamber; a dynamic parameter adjusting mechanism in the self-adaptive adjusting system adopts a feedforward-feedback composite control structure, the reheating steam temperature can be increased by about 2 DEG C every time the recirculation air volume is increased by 1%, the NOx concentration fluctuation is predicted in real time by applying an LSTM neural network, PID parameters are dynamically corrected through fuzzy reasoning, fuel characteristic changes are adapted, and the reheating steam temperature is increased by about 2 DEG C; and the amount of recycled flue gas is properly adjusted according to the load change to ensure that the unit is in the deep peak regulation load interval, and the unit operates to realize stable ultralow emission of NOx.

The utility model discloses a high-pressure steam extraction assembly and an ultra-supercritical adjustable steam extraction turbine, and relates to the technical field of turbines. The problems that heat is wasted and coal consumption is increased due to the fact that an existing ultrahigh-pressure heat supply steam extraction mode adopts a steam temperature and pressure reduction mode are solved. The steam supplementing device comprises a high-pressure cylinder, a steam supplementing pipeline and a three-way connector, the steam supplementing pipeline is arranged between the high-pressure cylinder and a steam supplementing valve, one end of the steam supplementing pipeline is communicated with the steam supplementing valve, and the other end of the steam supplementing pipeline is communicated with the high-pressure cylinder through the three-way connector. The three-way connector is arranged behind the high-pressure cylinder through flow of the fifth level, the pressure and temperature of steam after the high-pressure cylinder through flow of the fifth level are closest to the standard of an industrial park, and the three-way connector can mix high-temperature steam in the steam supplementing valve and steam after acting in the cylinder and extract the mixed steam, so that the temperature and pressure of the steam are adjusted; and moreover, temperature and pressure reduction is not needed, so that the waste of heat is avoided, and the coal consumption is further reduced.

The invention relates to the technical field of heat recovery of heat pumps, in particular to a heat pump-waste heat dual-recovery steam heating system based on screw compression. Comprising a base; the annular storage module is arranged on the base in a vertical state, and the annular storage module is provided with an outer storage unit and an inner storage unit which can be used for storing steam, and a leading-out pipe which can be used for leading out condensate water in the outer storage unit and the inner storage unit; the flow guide module is rotationally arranged at the bottom of the base, and the flow guide module is used for guiding out condensate water in the outer storage unit and the inner storage unit; the heat preservation module is vertically arranged on the base; according to the invention, steam can be comprehensively insulated and protected, and condensate water can be actively repelled.

The invention relates to the technical field of dead steam condensing equipment, and provides a direct air-cooling condenser and an air separation device. The direct air-cooling condenser comprises an air-cooling condenser body. The dead steam pipeline is used for conveying dead steam to the air-cooled condenser body; the spraying system is arranged in the dead steam pipeline and used for spraying atomized demineralized water into the dead steam pipeline; the steam distribution pipe is arranged on the air-cooling condenser body and communicates with the dead steam pipeline, and the steam distribution pipe is used for distributing dead steam; the cooling tube bundle is connected with the steam distribution tube and is used for condensing the dead steam distributed by the steam distribution tube; the air cooling axial flow fan is arranged on the air cooling condenser body and used for driving air to flow through the outer surface of the cooling tube bundle; the condensation water tank is connected with the bottom of the condensation tube bundle and used for collecting and storing condensate generated by condensation of the condensation tube bundle. The spraying system is arranged in the exhaust steam pipeline, so that the exhaust steam temperature can be reduced, and the heat exchange efficiency of the direct air-cooling condenser is improved.

The invention discloses a carbon capture system and method for recycling reaction heat of an absorption tower to assist regeneration, the system comprises a carbon capture power plant and a heat pump system, and the heat pump system is integrated with the carbon capture power plant. The system comprises a power plant and a carbon capture unit, wherein the carbon capture unit comprises an absorption tower and a desorption tower connected with the absorption tower; the heat pump system is used for recovering reaction heat of the absorption tower and providing medium-high temperature steam for the desorption tower, and additionally needed steam is extracted from a steam turbine of a power plant. The heat pump system and the carbon dioxide capture power plant are integrated, low-grade reaction heat in an absorption tower is effectively recovered, the temperature of medium-high-temperature steam needed by a reboiler of a desorption tower is increased, dependence on steam extraction of a steam turbine of the power plant is remarkably reduced, and therefore the energy consumption and the operation cost of the system are reduced.

The invention provides a precise temperature reduction control device and method, and the device comprises a steam inlet module which is used for introducing high-temperature and high-pressure steam, and carrying out the pressure reduction of the steam; the mixing module is used for mixing the steam subjected to pressure reduction and atomized water and scattering fog drops to obtain steam subjected to temperature reduction; the control module is used for collecting the real-time steam temperature and pressure of the steam inlet module and the temperature before atomized water injection in real time, obtaining the enthalpy value of current superheated steam, the enthalpy value of target saturated steam and the enthalpy value before atomized water injection through table look-up by combining the real-time steam temperature and pressure of the steam inlet module and the temperature before atomized water injection, and calculating the target water injection amount. A corresponding water spraying amount control instruction is generated; the atomized water supply module is used for spraying atomized water to the mixing module based on the water spraying amount control instruction; and the steam outlet module is used for outputting the steam after temperature reduction. The steam and atomized water can be fully mixed, the water spraying amount is accurately controlled, and the dryness of the steam after temperature reduction is guaranteed.

This invention discloses a novel, low-load, high-efficiency thermoelectric decoupling heating system. The system is characterized by replacing the high-pressure bypass section with an extraction section. This extraction section extracts steam from the middle of the superheater and uses this steam to heat the secondary air or drive the induced draft fan. Compared to existing technologies, this invention, after heating the secondary air or driving the induced draft fan, returns the steam to the cold section, thus overcoming the problem of limited extraction capacity in conventional systems. It also allows for changes in the coal-to-water ratio within the boiler under low load conditions, increasing the outlet steam temperature of the superheater and reheater under low load conditions, and avoiding the widespread problem of underheating of main steam and hot reheat steam under low load conditions.

The invention discloses a veterinary drug production steam monitoring system and method, and relates to the technical field of veterinary drug production steam monitoring, and the method comprises the steps: collecting an original data set containing real-time steam pressure, saturated steam temperature and steam dryness instantaneous values through a plurality of sensing nodes disposed in a steam pipe network; inputting the pressure and temperature data into a steam state calculation model, and generating a steam specific enthalpy value, an entropy value and a superheat degree value of each pipe section of the pipe network; starting a periodic dryness compensation process according to the comparison of the dryness instantaneous value and historical data, and generating a dryness adjustment instruction sequence based on the current working condition; and constructing a steam energy distribution diagram by using the obtained thermodynamic state parameters, performing dynamic optimization by combining a dryness adjustment instruction sequence, and finally generating steam supply strategies for different production links. According to the method, global reconstruction of the thermodynamic state of the pipe network and prospective dynamic regulation and control of the steam dryness are achieved, and the accuracy and stability of steam energy utilization in the veterinary drug production process are improved.

The utility model relates to the technical field of still kettles, in particular to a still kettle. Comprising a kettle body and a kettle cover, the kettle cover is mounted at one end, close to the feeding hole, of the kettle body; a mounting frame is fixedly mounted at the upper end of the kettle body; the kettle cover is rotationally connected with the mounting frame through a rotating rod; through the arrangement of the push plate and the vortex tube, the push plate can push steam entering the mounting shell to flow into the vortex tube, so that the steam flowing into the vortex tube is compressed to release heat, after the steam in the vortex tube releases heat, the air channel is controlled to be opened, so that cooled gas in the vortex tube is conveyed into the kettle body, and the operation is repeated, so that the steam in the vortex tube is cooled. Therefore, the temperature of the steam in the kettle body is reduced while the stability of the air pressure in the kettle body is ensured, and the damage to equipment caused by too fast change of the air pressure is avoided; and the reduction of the steam temperature in the kettle body can be accelerated, so that the cooling period is shortened, and the maintenance production efficiency of the calcium silicate board is improved.

The invention relates to a refrigerating system and method for recovering coking high-temperature condensed water waste heat coupling steam temperature adjustment. The refrigerating system comprises a crude benzene distillation unit, an ammonium sulfate unit, an ammonia distillation unit, a three-section type gas primary cooler, a condensed water heat exchanger, a steam heat exchanger, a waste heat water type refrigerating machine and a condensed water recovery water tank. The problem that a refrigerating station needs to be provided with a waste heat water type refrigerating machine and a steam type refrigerating unit due to the fact that waste heat of waste heat water of the primary cooler is insufficient can be solved while waste heat of high-temperature condensed water of a coking plant is recycled, the temperature of the waste heat water is increased through the steam heat exchanger, and then the heat exchange efficiency of the refrigerating machine is improved; the total investment is reduced, and the operation cost is saved.

The utility model discloses a novel sinter mixture bunker steam preheating device, which belongs to the technical field of sinter mixture bunker steam preheating, and comprises a boiler steam distribution drum, a heat preservation pipe is arranged at the top of the boiler steam distribution drum, an efficient steam-water separator is arranged at one end of the heat preservation pipe, a control valve is arranged in the efficient steam-water separator, and the control valve is connected with the steam distribution drum. A support frame is arranged at the bottom end of the efficient steam-water separator; according to the utility model, the thermal insulation pipe is arranged, the thermal insulation cotton and the thermal insulation pipe are used for protection through the design, so that the temperature loss of steam in the steam pipe is avoided, and then the heated sintering mixture ore tank is arranged on one side closer to the ignition furnace, so that the mixture can immediately enter the ignition furnace for ignition after being heated, and the heat loss in the conveying process is reduced; the air permeability of a material layer is improved, the thickness of a sintered material layer is increased, and the yield and quality of sintered ore are greatly improved.

The application relates to the technical field of air conditioners, and discloses a control method for a variable displacement compressor air conditioner, wherein an exhaust port of a variable displacement compressor is connected to a variable displacement chamber of the variable displacement compressor through an exhaust pipeline, and an electric heating device is arranged on the exhaust pipeline; the control method comprises the following steps: in the case that the variable displacement compressor air conditioner executes a heating mode, obtaining an exhaust temperature of the variable displacement compressor, an exhaust pressure and a saturated steam temperature corresponding to the exhaust pressure; and in the case that the difference between the exhaust temperature and the saturated steam temperature is less than a first temperature, controlling the electric heating device to start. The method can avoid liquid accumulation in the variable displacement chamber and eliminate noise caused by liquid accumulation. The application further discloses a control device for the variable displacement compressor air conditioner, a variable displacement compressor air conditioner and a storage medium.

The application discloses a steam temperature control method and device, a storage medium and an electronic device, relates to the technical field of control, and the method comprises the following steps: acquiring the current steam flow of a boiler, the current swing angle of a burner and the current flue gas temperature of a superheater inlet in a steam temperature control system of a thermal power plant; acquiring a superheater inlet and outlet enthalpy increase model; calculating the current steam flow, the current swing angle and the current flue gas temperature according to the superheater inlet and outlet enthalpy increase model to obtain the first inlet and outlet enthalpy increase of the superheater; calculating according to the first inlet and outlet enthalpy increase to obtain a target temperature value of the superheater inlet, and controlling the steam temperature of the superheater inlet according to the target temperature value. Through the application, the problem that the steam temperature is adjusted by a PID controller in the related art, resulting in relatively low accuracy of steam temperature control, is solved.

The application discloses a power station boiler combustion parameter self-optimization method based on an extreme random tree modeling, which comprises the following steps: S1, system software and hardware arrangement and communication environment building and function debugging; S2, test data exception elimination, and selection of test boiler modeling parameter related data; S3, establishment of five prediction models based on an extreme random tree model, including NOx emission, CO emission, flue gas temperature, reheat steam temperature and oxygen content deviation; S4, introduction of furnace temperature data to improve the prediction effect of the five prediction models; S5, measurement of the accuracy of the five prediction models, and quantification of the training and test effect; S6, dynamic control optimization based on the boiler combustion characteristic model. The index prediction method based on the extreme random tree is used to construct the prediction models of five indexes, including NOx concentration, CO concentration, air preheater outlet flue gas temperature, reheat steam temperature and oxygen content deviation on the left and right sides of the economizer outlet, and the furnace temperature is introduced to further improve the prediction accuracy of the models.

The invention relates to a method for optimizing and adjusting deep combustion of a tangential boiler of a coal-fired power plant, which comprises the following steps of: arranging pulverized coal burners at four corners of the lower part in a hearth of the tangential boiler or on a boiler wall, and arranging SOFA air nozzles at four corners of the hearth or on the boiler wall above the pulverized coal burners; sOFA air nozzles at four corners of a hearth or on a furnace wall are divided into two groups, the vertical swing angle of one group of SOFA air nozzles is inclined upwards, the vertical swing angle of the other group of SOFA air nozzles is inclined downwards, and a coal-fired power plant tangential boiler stable load deep combustion optimization and adjustment test is combined, so that the problems of residual smoke rotation at a stable load hearth outlet of the boiler and low smoke emission are effectively solved. The problems that the flue gas temperature deviation of a hearth outlet is large, the reheating steam temperature deviation is large, the low-load reheating steam temperature is low, the desuperheating water amount of a high-load reheater is large, the nitric oxide deviation of a denitration inlet is large, and the steam temperature or the wall temperature is overhigh are caused are solved, and meanwhile the low-nitrogen emission requirement is met.

The utility model relates to a waste heat recovery device technical field and disclose a kind of steam condensate tank steam waste heat recovery device, including installation bottom plate, waste heat recovery component, waste heat recovery component includes condensing box, condensing box is fixedly connected on the upper surface of installation bottom plate, the inside intermediate position of condensing box is fixedly connected with baffle, the rear surface of baffle is fixedly connected with multiple curved cooling pipes, the front end of multiple curved cooling pipes is all penetrated out the front surface of baffle, the end of multiple curved cooling pipes away from baffle is all penetrated out the upper surface of condensing box, by the two-stage heat exchange of condenser and separator, gradually steam temperature is reduced from high temperature to about 75°C, improve waste heat recovery efficiency;Meanwhile, after the removal oxygen and incondensable gas, condensate is recycled for boiler house feed water, reduce water resource waste, realize the effective recovery and recycling of steam waste heat, and further improve the practicality and economy of steam condensate tank steam waste heat recovery device.