947 results about "Steam pressure" patented technology

The invention relates to the technical field of steam turbine testing, in particular to a testing system for mismatch correction of a wide-load-interval thermal power generating unit speed regulation model, which comprises a thermodynamic system component, a speed regulation system device, a dynamic signal acquisition device and a control device, a dynamic signal processing module analyzes the relevance between main steam pressure sudden change and control valve opening oscillation in real time, a dynamic response database including a time sequence is constructed, and a control valve opening feed-forward compensation instruction and a combustor fuel distribution gradient adjustment signal are generated according to correction parameters. Power over-modulation wave crests caused by sudden load change are suppressed, and primary frequency modulation action delay is reduced; and the simulation verification module compares measured data with model output through an error feedback mechanism, dynamically adjusts high-pressure cylinder flow characteristic curve calibration parameters, optimizes a control strategy in combination with a network-related safety margin evaluation result, and realizes improvement of dynamic response precision in a full peak regulation interval and enhancement of power grid frequency stability.

The invention discloses a method for preventing main steam pressure fluctuation on the basis of controlling the coal combustion amount. The method comprises the following steps: acquiring running state data of the coal-fired boiler in real time; based on the operation state data and a preset boiler dynamic prediction model, predicting a steam pressure sequence of the boiler in a future preset time range, and judging whether to trigger a control action or not in combination with an event triggering strategy obtained by learning of a reinforcement learning agent; if it is judged that the control action is triggered, the reinforcement learning agent outputs an adjustment instruction of the total coal feeding amount according to the current operation state data; and controlling the total coal feeding amount of the boiler according to the adjusting instruction. According to the method, the timing and the force of control intervention can be intelligently determined according to the real-time state and future trend prediction of the boiler, and the accuracy and the foresight of main steam pressure control are improved.

The invention discloses a steam pipeline pressure control method, which comprises the following steps of: acquiring operation information of each key position of a pipe network in real time by constructing a data acquisition system and deploying an execution unit; a multivariable analysis method is utilized, topological structure characteristics of a steam pipeline are combined, a load change model of a steam consumption unit is constructed, the pressure change process caused by operation of different devices is recognized in advance, and a long-term pressure control strategy is made; meanwhile, an accumulative deviation curve is constructed based on a prediction and actual measurement residual evolution sequence, the potential fault risk of the system is identified in an auxiliary manner, and structured alarm output is formed, so that the safety guarantee capability of pipe network operation is enhanced. The steam pipeline pressure control method is suitable for the application scene that the overall steam use requirement is stable, but the local high-frequency disturbance behavior exists, the tiny pressure fluctuation trend can be accurately predicted under the high-disturbance working conditions such as frequent starting and stopping, and it is guaranteed that the steam pressure is stable.

The present invention relates to the technical field of water distillers, and disclosed are a thermocompression multi-effect water distiller system and a control method therefor. The thermocompression multi-effect water distiller system comprises a distillation unit and a control unit; the distillation unit comprises a multi-effect evaporator; the multi-effect evaporator is a horizontal tube falling film evaporator and has a side-by-side configuration, and the shell pass of a preceding effect evaporator is communicated with the tube pass of a following effect evaporator; the control unit controls the distillation unit during working, and the control unit is a feedforward-cascaded fuzzy PID model predictive control system and comprises an inner-loop control system and an outer-loop control system; the inner-loop control system uses fuzzy PID control, and the inner-loop control system is provided with a control system for fluctuations in industrial steam pressure Psteam; and the outer-loop control system uses model predictive control. In the present invention, by using the thermocompression multi-effect water distiller system and the control method therefor, the heat exchange efficiency is greatly improved; and a novel control system is provided, enabling normal operation within a range of 40-200% of a set operating condition.

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

The invention discloses a control method and system for outlet steam pressure of a steam jet type mixer, and relates to the technical field of steam jet type mixers.The control method comprises the following steps that real-time operation parameters and structure parameters of the steam jet type mixer are obtained; constructing an outlet pressure prediction model based on the historical operation data, and inputting the real-time operation parameters and the structure parameters into the prediction model to obtain an outlet pressure prediction value; the method is technically characterized by comprising the steps that an outlet pressure prediction model comprising a working condition feature recognition layer, a pressure change trend prediction layer and a pressure deviation early warning layer is constructed, and the model reduces prediction errors through iterative training by collecting full-cycle operation data of past three years; real-time operation parameters and structure parameters are input into the prediction model, so that an outlet pressure prediction value and a change trend graph can be obtained in advance; and on the basis, the control adjusting quantity is obtained by combining the outlet pressure deviation value and the development trend, so that the adjustment is more predictive.

The invention relates to the technical field of distributed control, in particular to an automatic control system and process for a corrugated carton production process, and the system comprises a body paper state online monitoring module which is used for collecting body paper humidity, preheating temperature and paperboard tension values in real time at a preheater node, combining the values into a multi-dimensional input data stream, establishing an initial working condition state vector, and outputting the initial working condition state vector; and calculating a deviation value between each parameter in the initial working condition state vector and a standard set value, and generating an upstream disturbance feature set. According to the method, the predicted value is compared with the control threshold value, the adjustment amount of the steam pressure or the production line speed of a plurality of downstream hot plate areas can be calculated, a distributed and feed-forward compensation instruction is generated, and the closed loop from source disturbance monitoring to future state multi-dimensional prediction to downstream multi-point cooperative compensation is more accurate. The suppression of production disturbance is realized, the control precision and response speed of quality fluctuation are improved, and the rejection rate caused by quality problems is reduced.

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 utility model discloses a waste heat steam boiler based on integration of a sulfur combustion furnace and nitrogen heat extraction, and belongs to the technical field of salt chemical engineering and waste heat recovery. In order to solve the problem of waste of waste heat of high-temperature SO2 flue gas in the SO2 preparation process of the sulfur combustion furnace, a layer of enclosure shell is additionally arranged outside a heat-preservation-free shell of the sulfur combustion furnace, an annular area between the enclosure shell and the heat-preservation-free shell serves as a heat exchange area, nitrogen or air serves as a heat exchange medium, dividing wall type heat exchange is carried out through the shell of the combustion furnace, the temperature of the nitrogen is increased, and the heat exchange efficiency is improved. The flue gas in the furnace is discharged after the temperature is gradually reduced; after being heated, the nitrogen is fed into the miniature high-temperature waste heat hot water boiler and exchanges heat with high-temperature waste heat water through the heat exchanger, and the cooled nitrogen is returned and circularly exchanges heat. The heated high-temperature waste heat supplied water is sent to downstream heat consumers and is continuously and circularly heated; the pressure of the flash steam is 0.1-0.6 MPa, and the flash steam is supplied as process steam, so that the flue gas waste heat can be greatly recovered when the normal operation of sulfur combustion is maintained.

The invention provides a thermodynamic equilibrium simulation analysis method and system, and relates to the technical field of data processing, and the method comprises the steps: 1, building a steam thermodynamic equilibrium model based on the technological parameters of a thermodynamic network; 2, analyzing a thermal distribution state through a steam thermal equilibrium model, identifying an unbalance factor in a process chain, and establishing a four-vertex geometric topological relation among a heat exchanger inlet / outlet, a pressure reduction module and a drain valve process node according to the physical layout of a thermal network; and step 3, based on the dynamic proportion characteristic of the four-vertex geometric topological relation, calculating a thermal correction factor, and adjusting the heat transfer coefficient, the steam pressure and the condensate water temperature parameter of the steam thermal equilibrium model according to the thermal correction factor to obtain the corrected steam thermal equilibrium model parameter. According to the method, through dynamic correction of model parameters and simulation optimization, accurate identification and dynamic regulation and control of thermal unbalance are realized, a closed loop for optimized feedback is formed, and the operation efficiency and stability of a thermal system are improved.

The present application provides a dynamics analysis method for an ammonia combustion refrigeration system in large park cooling. The method comprises: on the basis of a geometric structure of an ammonia combustion chamber and a fuel supply amount, calculating the heat generated by ammonia combustion and analyzing the heat transfer mode between the combustion chamber and a desorption tower, the heat transfer mode comprising direct contact type heat transfer and partition type heat transfer, and simulating the heat transfer process to obtain and draw the heat flux distribution of the tower wall surface; on the basis of the flow state and a relationship curve between the pressure drop and the flow velocity, analyzing the desorption process of a refrigerant in a solution, and on the basis of the concentration of the solution, a boiling point of the refrigerant, and the vapor pressure, calculating local desorption rates at different positions in the desorption tower and the refrigerant vapor generation amount; and on the basis of the heat flux distribution, calculating the temperature distribution of the solution, and analyzing the heat transfer and mass transfer processes in the desorption tower to obtain a local heat transfer coefficient and the mass transfer efficiency distribution of the surface of a filler.

The invention provides a deep intelligent coordination method for a thermal power generating unit, which comprises the following steps of: acquiring and preprocessing data, introducing a coefficient based on coal quality analysis and dynamically adjusting in a dry state coordination optimization stage, calculating and adjusting the coal feed quantity and the feed-forward quantity of the water feed quantity according to the conditions of the unit and a power grid by combining predictive control and an intelligent feed-forward technology, and improving the load adjusting capability. In the wet-dry and dry-wet conversion steps, the water level of a separator, steam and feed water flow are continuously monitored, conversion is triggered according to set conditions, equipment such as a feed pump is coordinated to act, and stable conversion is guaranteed. During wet state coordinated optimization, the water level of the separator and the feed water flow are stabilized by using a PID or intelligent algorithm, main steam pressure and load are adjusted by using model predictive control and the like, and meanwhile, a wet state characteristic and an equipment limitation constraint instruction are considered. According to the method, the intelligent coordination level of deep peak regulation of the thermal power generating unit is comprehensively improved, and the operation efficiency, stability and flexibility of the unit are enhanced.

The invention provides a waste steam source high-temperature steam heat pump testing system based on heat energy cyclic utilization, and belongs to the field of compression heat pumps. The invention aims to solve the problems of unstable heat supply in a high-temperature lift, low energy efficiency of an evaporation end, poor temperature control effect of a low-level heat source side and limited thermal control means of an experimental platform. The system comprises a condenser, an expansion valve, a liquid storage tank, an evaporator, a compressor, a water spraying cooling tank, a steam pressure reducing valve, a circulating pump and a regulating valve, or a water mixing cooling tank and a heat supply liquid storage tank are additionally arranged, so that the dynamic balance and control of the temperature of the hot end of the system are realized; or a steam pressure reducing valve is replaced by a steam-water heat exchanger, so that heat exchange is carried out on condensed steam and working medium water to realize mild cooling, and redundant energy consumption is avoided; or a bypass adjustable shunting loop is arranged, so that partial high-temperature backwater bypass mixing is realized, and the thermal matching property and the operation stability of the system are enhanced. According to the invention, the output temperature of over 100 DEG C is realized, and the universality and debugging flexibility of experimental system design are realized.

The invention relates to the technical field of expanded polystyrene production, and discloses an expanded polystyrene automatic molding control system and method.The system comprises a detection module, a data analysis module and a central control module, and the detection module collects mold temperature distribution, molded blank local density and steam pressure data in real time; the data analysis module calculates a temperature fluctuation index according to the temperature data, obtains a dynamic density compensation coefficient by means of a density model, and determines a forming quality deviation level; and the central control module adjusts the steam heating power according to the deviation level, determines and corrects the mold opening and closing rate in combination with the pressure and density change rate, and generates a motion trail control parameter. The method comprises the steps of data acquisition, calculation and analysis, parameter adjustment and instruction output. Through multi-parameter cooperative control, forming automation and precision are achieved, the quality stability and the production efficiency are improved, and the method is suitable for production of related products.

The invention discloses a frequency modulation control method and system for a thermal power generating unit, and relates to the technical field of frequency modulation control, and the method comprises the steps: collecting a frequency modulation instruction signal of a power grid, decomposing the frequency modulation instruction signal, and obtaining a plurality of intrinsic mode function components and residual components; performing spectral analysis on each intrinsic mode function component, marking the component of which the main frequency exceeds a high-frequency disturbance frequency threshold as a high-frequency disturbance component, and calculating a fluctuation amplitude and a change rate; a thermal system control instruction is generated through a PID control algorithm, the coal feeding amount and the main steam pressure are adjusted, and an auxiliary compensation control instruction is generated for the high-frequency disturbance component through a fuzzy control algorithm; a thermal system control instruction and an auxiliary compensation control instruction are converted into operation parameters of a thermal power generating unit control mechanism and issued for execution, when the control effect deviation continuously exceeds a deviation threshold value, an optimization process is triggered, and the frequency modulation stability and the equipment safety of a unit in the environment that new energy is accessed to a power grid in a high proportion are remarkably improved.

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 relates to a method and device for evaluating the rapid load changing capacity of a coal-fired unit, and the method comprises the steps: firstly, building a coal-fired unit dynamic model which comprises a coal pulverizing system, a boiler and a steam turbine through historical operation data, and determining model parameters based on the operation characteristics of an actual unit; secondly, main steam pressure and power instructions of different load sections are set according to the sliding pressure curve, a variable load capacity test is carried out by adopting a method of increasing the load increasing rate, and meanwhile, the coal feeding amount, the boiler water feeding amount and the adjusting range and the changing rate of a main steam valve are restrained; finally, dynamic changes of key parameters such as main steam pressure and steam-water separator outlet temperature in the variable load process are analyzed, and the actual average load rising rate of the unit is evaluated. According to the invention, the variable load capability of the unit in different load intervals can be accurately evaluated. Therefore, the problems that in the prior art, the load changing capacity of a unit in different load intervals is difficult to accurately evaluate, and the stabilization of new energy power generation fluctuation and the stability of power grid frequency are greatly influenced are solved.

The utility model relates to the technical field of steam turbines, and discloses a thermodynamic system of a coupling back pressure turbine for wide-load peak regulation, which is provided with a boiler, a back pressure turbine, a high-pressure cylinder, an intermediate-pressure cylinder, a low-pressure cylinder, a generator and a recovery mechanism, the boiler is respectively connected with the back pressure machine, the high-pressure cylinder and the intermediate-pressure cylinder; the back pressure machine is connected with the high-pressure cylinder; the medium-pressure cylinder is connected with the low-pressure cylinder; the low-pressure cylinder is connected with the generator; the recycling mechanism is connected with the low-pressure cylinder and the boiler and used for condensing steam discharged by the low-pressure cylinder and recycling and conveying the steam to the boiler. In a high-load operation state, the thermodynamic system, the back pressure turbine and the high-pressure cylinder operate in parallel, and the boiler conveys steam to the back pressure turbine and the high-pressure cylinder. In the thermodynamic system in a low-load operation state, the back pressure machine and the high-pressure cylinder are connected in series for operation, the boiler conveys steam to the back pressure machine, and the back pressure machine conveys steam to the high-pressure cylinder. According to the utility model, the pressure of steam entering the steam turbine during low-load operation can be improved, and the feed water temperature and the operation economy can be improved.

According to the method and system for calculating the efficiency of the low-pressure cylinder of the steam turbine on line, under the reference working condition and multiple working conditions, parameters such as steam pressure, temperature and back pressure of an inlet and an outlet of a first stage, a second stage and a third stage of the low-pressure cylinder are collected, the efficiency of each stage and the efficiency of the low-pressure cylinder are calculated, dimensionless processing is carried out, and the efficiency of the low-pressure cylinder is calculated; and establishing a multiple regression model which takes the superheated steam stage efficiency as an independent variable and takes the low-pressure cylinder efficiency as a dependent variable. And considering the influence of the back pressure on the efficiency of the low-pressure cylinder, establishing a compensation model, and correcting the predicted efficiency of the low-pressure cylinder. In actual operation, the parameters are collected in real time, the efficiency of the current stage is calculated and substituted into the regression model and the compensation model, and the real-time efficiency of the low-pressure cylinder is obtained. According to the method, direct measurement of wet steam parameters is avoided by utilizing superheated steam stage data which are easy to obtain, real-time and accurate calculation of the efficiency of the low-pressure cylinder under different working conditions is realized, and the method can be widely applied to performance monitoring, operation optimization and fault diagnosis of a turboset.

The invention discloses a regulation and control method for coping with accidental overrun of outlet steam pressure of a circulating fluidized bed boiler, which realizes advanced coping with the overrun of the outlet steam pressure of the circulating fluidized bed boiler and greatly avoids the overrun phenomenon. 0.001 MPa per second is defined as an accidental overrun early warning value of the outlet steam pressure change rate of the circulating fluidized bed boiler; the change rate of the steam pressure at the outlet of the circulating fluidized bed boiler is collected in real time, if the change rate of the steam pressure at the outlet of the circulating fluidized bed boiler collected in real time is larger than 0.001 MPa / s, it is pre-judged that the steam pressure at the outlet of the circulating fluidized bed boiler is about to accidentally exceed the limit, and the coal feeding flow of the boiler is adjusted by changing feedforward of a PI adjusting system of the coal feeding flow of the boiler. The purpose of rapidly adjusting the coal feeding flow of the boiler is achieved, and therefore the situation that the outlet steam pressure is about to exceed the limit accidentally is avoided.

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.

A process of forming a titania-silica glass body, the process including exposing a titania-doped silica soot body to a constant steam pressure step during which the partial steam pressure is at a first partial pressure of steam P1 that is from about 0 Torr to about 760 Torr and exposing the soot body to a ramp-up steam pressure step during which the partial steam pressure increases from the first partial pressure of steam P1 to a second partial pressure of steam P2, the second partial pressure of steam P2 being from about 50 Torr to about 760 Torr. The second partial pressure of steam P2 being greater than the first partial pressure of steam P1. The process further including heating the soot body during the constant steam pressure step and during the ramp-up steam pressure step and increasing the temperature during at least one of the constant steam pressure step and the ramp-up steam pressure step.

The invention discloses a method and a device for determining an instruction of a coal feeder in a coal-fired unit, relates to the technical field of electric power, and mainly aims to provide a method for determining the instruction of the coal feeder under the condition of distinguishing dry and wet state conversion so as to improve the operation safety of the unit. According to the main technical scheme, the method comprises the steps of determining a load instruction change condition according to a current load instruction and a historical load instruction; determining the change of the main steam pressure set value according to the current main steam pressure set value and the historical main steam pressure set value; determining a target state conversion coal quantity control curve according to the actual load sequence of the unit and a hysteresis function control method when judging that the unit is in dry and wet state conversion according to the actual load sequence of the unit; determining a basic coal supply amount according to the target transition coal amount control curve and the current load instruction; and generating a coal feeder instruction by combining the basic coal feeding amount, the change condition of the main steam pressure set value, the change condition of the load instruction, the current actual main steam pressure, the current main steam pressure set value and the current total fuel amount.

The invention provides a thermal power generating unit steam turbine frequency modulation model self-correction self-optimization-approaching method, which comprises the steps of constructing a data set, inputting the data set into a PyCT-PsLSTM prediction network model, outputting main steam pressure, valve opening and unit load and actual measurement value calculation errors, and if the errors exceed a threshold value, performing early warning and starting PID parameter optimization correction; screening non-tampered current power PID parameters from the data set, inputting the non-tampered current power PID parameters into the GPR model to obtain a predicted mean value, a standard deviation and a confidence interval, judging tampering if the parameters exceed the interval, calculating an uncertainty coefficient based on the mean value and the standard deviation, performing global search by using a particle swarm algorithm if the coefficient is greater than a threshold value, and performing local optimization if the coefficient is less than or equal to the threshold value; and obtaining an optimal solution, updating the data set, finely adjusting tampering parameters, comparing an actual value with GPR output, and judging to release or keep early warning. According to the method, the PID controller parameters and the confidence interval thereof are compared and predicted, early warning ending or warning keeping is judged, and the key parameter time sequence characteristic modeling capability is improved.

The invention discloses a thermal power generating unit coordination control data and mechanism hybrid modeling method and device, computer equipment and a computer readable storage medium, and relates to the technical field of thermal energy engineering and power system modeling and control. Establishing a high-precision dynamic mechanism model of the working medium flow and heat transfer process of the boiler-steam turbine system; then, constructing an error correction model fusing the long-short-term memory network, the convolutional neural network and residual connection; and finally, fusing the mechanism model and the error correction model through parallel computing to form a dynamic hybrid model with physical interpretability and high precision. Through the hybrid modeling strategy, the prediction accuracy of key parameters such as the main steam pressure, the separator outlet steam enthalpy value and the unit load in the wide load range, especially under the dry-state operation working condition is remarkably improved, and a reliable model basis is provided for designing an advanced unit coordination control system.

The invention discloses a self-driven boosting steam heat supply system and an on-demand optimization matching method, and belongs to the technical field of industrial steam centralized heat supply and energy conservation. Comprising a steam heat source, a steam turbine, a steam compressor, user areas with different pressure requirements, an electric pressure reducing valve, an electric adjusting valve and a data acquisition control center. The system utilizes a steam turbine and a steam compressor to convert surplus energy of steam in front of a low-pressure user area into power for increasing steam pressure of a high-pressure user area, and gradient utilization of steam energy is achieved. According to the on-demand optimization matching method, user partitions are divided by analyzing user demands, a pipe network model is established by adopting pipe network mechanism modeling or data modeling, an intelligent adjustment algorithm is constructed, and a closed loop is regulated and controlled by means of a data acquisition control center. The problems that a traditional steam heat supply system wastes energy and cannot accurately match user requirements are effectively solved, heat source supply parameters and system energy consumption can be reduced, the energy utilization efficiency is improved, and good economic benefits and social benefits are generated.

The invention provides a leaf moistening and feeding control method and system, electronic equipment and a computer medium. The method comprises the following steps: collecting real-time data; based on the real-time data, a water adding amount reference value of the current time point is obtained; environment parameters of the current time point are obtained, the water adding amount reference value of the current time point is corrected, and a first corrected water adding amount reference value of the current time point is obtained; according to the first corrected water adding amount reference value, water is added at a leaf moistening and feeding inlet; an outlet moisture value corresponding to the first corrected water adding amount reference value is collected, and an error is formed; the first corrected water adding amount reference value, the error and the error change rate are input into a fuzzy PID controller, and the fuzzy PID controller outputs a second corrected water adding amount reference value; and at least one of the steam pressure, the water spraying amount, the air amount and the temperature is adjusted based on the second corrected water adding amount reference value. The water adding precision of the charging machine is improved.

The invention discloses a primary frequency modulation cooperative control system for a thermal power generating unit, and the system comprises a high-frequency data collection module which synchronously collects the frequency of a power grid, the valve position of a steam turbine and the main steam pressure through an FPGA chip, calculates the frequency change gradient, and activates a rapid frequency modulation mode when the frequency change gradient exceeds a preset range or not; the multi-modal compensation decision module is used for calling a multi-modal dynamic compensation model to predict a power gap in a future time period and distributing a compensation amount; the safety constraint execution module is used for monitoring the main steam pressure deviation and triggering the reinforcement learning agent to update the parameter library when the main steam pressure deviation exceeds the preset load change rate; and the parameter optimization module is used for carrying out reinforcement learning dynamic adjustment on state space and action space parameters, and integrating security constraint indexes in a reward function. Through collaborative design of multi-mode dynamic compensation, intelligent parameter optimization and security constraint protection, the problems of response delay, parameter mismatch and security risk of a traditional frequency modulation technology are solved, and the method has remarkable technical innovation and engineering application value.

The invention discloses a large steam turbine valve leakproofness test method, and relates to steam turbine valve leakproofness tests. In order to solve the technical problem that in the prior art, a steam turbine valve leakproofness test method capable of reducing the starting time of a unit, saving the starting cost and improving the safety of the unit in the starting stage is urgently needed, the technical scheme provided by the invention is as follows: a large steam turbine valve leakproofness test method is provided. Comprising the steps that boiler steam pressure of a turbine corresponding to a target valve is adjusted to a preset interval; detecting the rotating speed of the steam turbine unit in the state that all the main valves are opened and the speed regulating valve is closed; when the rotating speed is smaller than a preset threshold value, a main throttle valve leakproofness test is conducted; the main valve leakproofness test specifically comprises the following steps: opening a speed regulation valve at a preset constant speed, gradually increasing to a full-open position, judging the current rotating speed of the steam turbine unit, and outputting a leakproofness qualified result if the current rotating speed is smaller than a preset threshold value. The device is suitable for the leakproofness test of the large steam turbine valve.

The invention discloses forming equipment for producing a vinyl toy, belongs to the technical field of vinyl forming, and aims to solve the problems that the thickness of a formed vinyl product is not uniform due to the fact that the rotating speed of a motor is unstable, and flaws occur to the formed vinyl product due to the fact that the temperature is suddenly reduced during cooling. A driving assembly is fixedly arranged on the outer wall of the rear side of the vinyl furnace, a rotating assembly is rotatably arranged on the side wall of a vinyl furnace cavity in a penetrating mode, a connecting assembly is further fixedly arranged on the outer wall of the rear side of the vinyl furnace, a pre-cooling assembly is slidably arranged on the containing frame, a support is placed on the pre-cooling assembly, and a plurality of forming assemblies are arranged on the support. According to the heat dissipation device, steam pressure can be immediately utilized to automatically drive the connecting assembly and the rotating assembly to operate, and the uniform heat dissipation efficiency can be further improved under the condition that it is guaranteed that the temperature is not suddenly lowered.