59 results about "Unit operation" patented technology

A temperature control device includes a temperature detector, a difference operation unit, a controller, a saturation processing circuit unit, a rewritable storage unit, and a conversion unit. The difference operation unit operates a digital value corresponding to a difference value between a detected temperature value and a target temperature. The controller calculates a manipulated variable using the digital value operated by the difference operation unit. The saturation processing circuit unit includes a digital circuit to limit an output value of the controller to a pre-set upper limit value. The rewritable storage unit stores the upper limit value read from a storage area of the rewritable storage unit and input into the saturation processing circuit unit. The conversion unit converts the output value of the saturation processing circuit unit into an analog signal to output the converted value as a control command value to the heater.

The invention relates to the technical field of peak regulation of coal-fired power units, and discloses a self-adaptive regulation method and system for full-load peak regulation of a coal-fired power unit. The method comprises the steps of collecting unit operation parameters such as boiler temperature, turbine rotating speed and generator voltage, and power grid peak regulation instructions such as real-time load demand and predicted load fluctuation; analyzing a peak regulation state based on the collected data, and dividing the peak regulation state into three types of stable operation, transition regulation and limit peak regulation; then calculating an adjustment characteristic quantity according to the current state and the operation parameters, wherein the characteristic quantity reflects the matching relationship between the unit performance and the peak regulation requirement; generating a plurality of groups of adjustment schemes including combustion optimization, steam adjustment and power control based on the characteristic quantity and the peak regulation instruction; and selecting and executing an optimal scheme by evaluating indexes such as efficiency loss, stability influence and maintenance cost. The method can dynamically respond to the load change of the power grid, accurately adapt to the peak regulation requirement in the full load range, and enable the peak regulation of the unit to be more flexible and harmonious.

A computer implemented method for generating a problem specific representation of a process network to enable controlling or monitoring a process network with at least two interconnected chemical plants, the method comprising the steps of providing a first digital representation of the process network comprising a digital process representation of each plant, its connections to other plants and sensor elements placed in the process network, generating based on the first digital representation a graph structure including vertices representing unit operations, edges linking unit operations representing at least physico-chemical quantities, wherein the edges include edge meta data representing at least physico-chemical quantities, and a measurable tag, generating based on the graph structure a collapsed graph structure including, vertices representing virtual unit operations, edges linking virtual unit operations representing at least physico-chemical quantities, wherein the edges include edge meta data representing observable physico chemical quantities, and their relation to vertices, deriving a set of balance equations from the collapsed graph structure, providing the set of balance equations, and physico- chemical quantities for monitoring and / or controlling operation of a process network is proposed.

This invention relates to a system for detecting leakages in a fluid-bearing structure, the system comprising at least a local arrangement arranged at a fluid-bearing structure and comprising at least a valve for closing a fluid line of the fluid-bearing structure to create a hydrostatic subnetwork within the fluid-bearing structure, a pressure sensor (2) for measuring the fluid pressure in the hydrostatic subnetwork, a processing unit (3), an operating unit (10), whereby the processing unit (3) is adapted to direct the valve to close itself, to direct the pressure sensor (2) to measure the fluid pressure, to transmit a measured designated value to the operating unit (10), to direct the valve to open itself, whereby the operating unit (10) is adapted to receive a measured designated value from the processing unit (3), to command the processing unit (3) to direct, to determine a leakage likelihood and a measurement duration associated with the arranged fluid-bearing structure based on a calculated fluid pressure difference, to build a multi-dimensional latent space model based on multiple pressure differences between the measured fluid pressure and a predefined reference fluid pressure and based on the corresponding measurement duration of each pressure difference, to apply a clustering method to the built latent space in order to define at least two clusters, whereby the clusters represent different confidence levels regarding the detection of a leakage, to transform consecutive pressure measurements into a multi-dimensional data representation representing an individual fluid-bearing structure, to determine to which cluster the transformed multi-dimensional data representation belongs in order to yield the leakage confidence level of the corresponding fluid-bearing structure.

The present application belongs to the technical field of fine chemical industry, and relates to a recycling method of accelerator M tar. In the waste M tar produced in M production, a catalyst is added, high-temperature decomposition is carried out under nitrogen protection, and recycled raw materials aniline, carbon disulfide and intermediate benzothiazole and the like are obtained, most of which are recycled. The present application adopts common equipment and unit operations, the catalyst can be reused, and the treatment of production waste is easy to realize industrial production.

The invention relates to the technical field of solid waste resourceful treatment and industrial automation control, and discloses a cracking production line intelligent control method and device.According to the cracking production line intelligent control method, a virtual accumulated energy index is calculated by collecting operation parameters of a feeding and discharging unit, and accordingly whether a conveying pipe section has a soft blockage trend or not is judged; after it is confirmed that the blocking trend exists, the material level of the colloidal particle buffering bin is detected to verify the material sealing safety; and when the safety condition is met, gas machine cooperative control is triggered, the feeding star-shaped discharger is driven to execute S-shaped pulse airlock action, and meanwhile, the raw material feeding auger is controlled to execute trapezoidal wave frequency sweeping conveying action until the virtual accumulated energy index is recovered. The blockage risk is pre-judged in advance through energy monitoring, efficient dredging is achieved through frequency conversion vibration and pulse control on the premise that reaction airtight safety is guaranteed, non-planned shutdown is effectively avoided, and the operation stability of a production line is improved.

The application discloses a kind of weak steady-state energy conservation's coal-fired boiler calorific value correction method and device, the method includes the following steps: extracting weak steady-state parameter main parameter from the real-time data of unit operation, each main parameter is filtered in time detection window and weak steady-state condition is judged, when all main parameters meet weak steady-state judgment condition during detection, the mean value of energy conservation parameter under the corresponding detection number is output;Using the mean value of energy conservation parameter carries out boiler heat balance calculation, obtains the actual fuel heat value corresponding to current unit load;Actual fuel heat value Q net.ar The ratio COR of the original design fuel heat value Q design Of unit is used as coal-fired boiler calorific value correction amount, and the fuel quantity of unit is adjusted by coal-fired boiler calorific value correction amount;The application has the advantages that: avoid system repeated oscillation, improve calorific value correction precision.

The present invention belongs to the technical field of power system operation control, and relates to a method for optimizing unit operation strategies under the coordination of an electric energy market and a capacity market, comprising: 1. constructing a decision optimization model for upper-level power generation enterprises to participate in an electric energy spot market and an electric capacity market, 2. constructing a lower-level electric energy spot market clearing model, 3. constructing a lower-level electric capacity market clearing model, 4. converting the lower-level market clearing problem into a KKT optimality condition, 5. linearizing the model, and 6. calling a Gurobi solver to solve the linearized mixed integer linear programming problem; the present invention fully considers the coordinated operation relationship between the electric energy spot market and the electric capacity market, realizes the short-term optimization of the electric energy market and the long-term planning of the electric capacity market complement each other, enhances the linkage between markets, further improves the overall market efficiency, and effectively guarantees the reliability margin of the system.

This invention proposes a method for recycling mining wastewater. This method extracts heavy metal ions and / or toxic metal ions from mining wastewater through a reaction process combined with specific unit operations, yielding a raw material solution containing the desired cations and acidity. By reacting this raw material solution with necessary components, a composite flocculant with synergistic effects combining organic and inorganic components is prepared. This method not only achieves the transformation of mining wastewater into a valuable resource but also results in virtually no waste residue discharge, with almost all waste liquid being recycled and reused, providing a new approach to the resource utilization of mining wastewater.

The application discloses a kind of MSR secondary reheat extraction flow optimization methods of nuclear power unit based on NSGA-II, by establishing nuclear power unit conventional island thermodynamic system model, with secondary reheat extraction flow as design variable, with secondary reheat steam end difference and electric power as optimization goal optimization, to give the secondary reheat extraction flow of electric power most close to rated electric power and secondary reheat steam end difference most close to design end difference.This application has the advantages that: with secondary reheat extraction flow as design variable optimization, compared with the existing research focuses on reheat steam pressure, temperature and other design parameters optimization, directly controllable, easy for unit operation personnel to adjust unit operating condition.

The invention relates to an operation control method and device for a lithium bromide refrigerating unit. The operation parameters of the unit are monitored in real time; wherein the operation parameters at least comprise flow and temperature of cold water, hot water and cooling water; based on the operation parameters, calculating at least one indirect characteristic quantity reflecting the overall thermodynamic state of the unit; according to the change mode of the indirect characteristic quantity, the current abnormal state of the unit is judged; analyzing a fault cause based on the abnormal state; and outputting a corresponding control maintenance strategy according to the fault inducement. According to the technical scheme provided by the invention, the dependence on the experience of maintenance personnel can be greatly reduced, the accuracy of abnormity judgment and the maintenance efficiency are improved, the problem can be quickly positioned, and effective measures can be taken, so that the stable operation of the unit is ensured, the shutdown loss is reduced, and the operation reliability and economy of the unit are improved.

The application provides a unit control method, device and equipment suitable for a third generation pressurized water reactor, and the method comprises the following steps: if it is detected that a single-column AHP system fails to be isolated, the feedwater temperature of a secondary loop feedwater system is monitored in real time; if the difference of the feedwater temperature in a preset unit time is greater than a preset feedwater deviation value, the real-time operation power of the unit is obtained; whether the real-time operation power meets a preset unit power adjustment condition is judged according to a preset operation control strategy; if yes, the operation power of the unit is adjusted according to the unit power adjustment value in the operation control strategy. The embodiment of the application can adjust the operation power of the unit according to the unit power adjustment value in the operation control strategy, effectively improves the availability of the unit operation after the single-column AHP system is isolated, and ensures the safety and reliability of the unit operation.

Electrochemically mediated sorbent-based carbon capture systems have recently gained attention as an alternative to traditional thermally based separations. Realizations of such systems typically require a choice between thermodynamically favorable but practically challenging two-stage systems, which combine activation with capture and deactivation with release, or pragmatic but less energy-efficient stepwise four-stage processes decoupling these steps. In this work, we present a thermodynamic assessment of novel multistage systems, which are shown to combine the practicality of sequential unit operations with the thermodynamic favorability of concerted operations. A generalized thermodynamic assessment shows these systems approach the thermodynamic minimum energy of separation in the limit of many stages for an arbitrary sorbent chemistry. Staged desorption is further shown to decrease dramatically the amount of gas in the cell during deactivation, potentially reducing bubble-driven inefficiencies.

The invention discloses a reactor core control method which comprises the following steps: during base load operation, inserting and / or lifting a T rod group for temperature regulation and compensation of reactor core reactivity change into and / or from a reactor core, and compensating reactor core temperature change caused by excess reactivity and burnup effect; the P rod group for regulating and controlling the power of the reactor core keeps still along with the power; and when the load tracking mode runs, the effect caused by power change is compensated by the P rod group, the coolant temperature change caused by xenon poison change effect is compensated by the T rod group, and the average temperature of the coolant is kept in the running interval. According to the reactor core control method, reactor core power and temperature control is achieved through the P rod set and the T rod set, meanwhile, reactor core hot spot factors are reduced, the operation allowance and the safety allowance of the reactor core are ensured, and then the unit operation economical efficiency is improved.

The present invention relates to the technical field of nuclear auxiliary systems, and discloses a method for restoring the boron-10 abundance of a reactor coolant system boric acid solution, comprising the following steps: judging whether the boric acid solution to be tested reaches a startup recovery condition; if so, obtaining a sample to be tested; analyzing the sample to be tested to obtain sample data; obtaining on-site collection data; calculating based on the sample data and the on-site collection data, obtaining an enriched boric acid mass to be added; making boron according to the enriched boric acid mass to be added, obtaining a boric acid solution to be added; analyzing the boric acid solution to be added, obtaining the boron concentration of the boric acid solution to be added; restoring the boric acid solution of a boric acid solution storage tank according to the boron concentration of the boric acid solution to be added. The present invention gradually increases the boron-10 abundance of the coolant system boric acid solution by re-making boron and adding lithium for water exchange or boronization and power reduction operation in the reactor coolant system during unit operation, reduces the critical boron concentration deviation, and avoids the problem of exceeding the limit value.

Apparatus for processing a liquid comprising a target substance, preferably a biomolecule, is provided. The apparatus comprises at least a first and a second means for carrying out a unit operation, each means for carrying out a unit operation comprising a feed for a liquid in fluid connection with the inlet of a flow-controller comprising a variable flow inlet valve and an outlet, wherein at least one of the means for carrying out a unit operation comprises feeds for at least two liquids, the feeds being in fluid connection with the inlets of a multiple inlet flow-controller comprising two or more variable flow inlet valves for dosing the at least two liquids, the flow-controller also comprising an outlet; a feed for a liquid feedstock comprising the target substance in fluid connection with the outlet from the flow-controller thereby to enable combination of the feed for a liquid comprising the target substance with the mixed bioprocessing liquids to produce a device feed; a device for achieving a processing operation comprising a device inlet and a device outlet, the device inlet being in fluid connection with the device feed; and a means for imparting flow through the flow controller and from the feed for the liquid feedstock through the processing device via the device inlet; and wherein the feed for a liquid feedstock comprising the target substance for the second means for carrying out a unit operation comprises the outlet from the first means for carrying out a unit operation.

The application provides a method for checking rationality of power generation plan adjustment of a hydropower station, comprising the following steps: S1, determining a safe and stable operation area of a unit according to a gross water head at a temporary adjustment plan time of a power grid, and taking into account an influence of subsequent water head changes; S2, unit output distribution and stable operation checking; and S3, reservoir safe operation checking. The method can check whether the adjusted power generation plan meets the safe and stable operation of the unit and the reservoir according to the current gross water head by introducing a margin coefficient of the influence of water head changes on the unit output, take into account the influence of subsequent water head changes, avoid the unit operation in a vibration area, reasonably distribute the output, fully utilize the power generation efficiency of the unit, and reduce the start-stop times of the unit.

The present application relates to the technical field of water conservancy and hydropower engineering, and particularly relates to a control method for accelerating surge attenuation of a surge chamber of a pumped storage power station. Two units are first unloaded, and at a first opening time T1, one unit is opened from no-load opening to guide vane pause relative opening τ Z . Most of the surge chamber water level fluctuation is offset by opening a large opening degree for first-stage regulation, and the remaining water level fluctuation is reserved for subsequent guide vane action to offset; subsequently, the guide vane maintains a constant relative opening τ Z , and at a second opening time T2, the guide vane is opened from τ Z to full opening. The remaining surge chamber water level fluctuation is offset by opening a small opening degree for second-stage regulation, and through stepwise differential regulation, rapid attenuation of the water level fluctuation is achieved. A solution method for the first opening time T1 and the second opening time T2, and the guide vane pause relative opening τ Z is given. The present application accelerates the attenuation of the surge of the surge chamber, reduces the grid-connection waiting time after the unit is unloaded, improves the flexibility of the unit operation, and increases the power generation benefit of the hydropower station.

The application discloses a kind of unit no water flow detection method, device and unit.Therein, the method includes: after unit start-up operation, judge shell tube pressure P and shell tube evaporation temperature T 蒸 Whether to meet the first preset condition: P≤P1, or, T 蒸 ≤T1;If meet, determine the time interval t from unit start-up to meet the first preset condition, judge whether to meet: t≤t 设 ;If yes, then the opening of regulating valve is up, and further according to suction temperature T 吸 , shell tube's inlet and outlet water temperature, T 蒸 Identify no water flow fault and execute corresponding protection action;If no, then keep unit normal operation, and according to P and T 吸 Identify no water flow fault and execute corresponding protection action.The application can accurately early warning and protection to unit no water flow operation, avoid shell tube freeze crack by identifying no water flow operation through the operating parameter of unit respectively when unit start-up and during unit operation, and implementing corresponding processing measures.

“Parametric Differential Moving Bed” named as PDMB, characterizes by obtaining target separation system's elution profile via optimized chromatography's separation parameters between selected solid sorbent and mobile phase; such generalized process employ an apparatus transforming such profile for mass production purpose, wherein disclosed apparatus bypassing imperfections observed in chromatography via new mass transfer equilibrium contact method, differential set-up between two phases, eliminating displacement zone via maintaining installed resin / adsorbent in semi-dry status thus enhancing maximum mass transfer efficiency. Through implementing aforesaid methods, disclosed apparatus further employs single stage recycle procedures to simulate moving beds operation in confined closed loop in differential protocols; which comprise multiple modules sequentially connected, yet each functions independently and simultaneously feeding feed solution, isolating at least one desired component, recycling mobile phase, concentrating multiple isolated components, regenerating adsorbent, washing and sanitizing; apparatus further integrate additional sequential unit operation installing other type solid phase material within.

The utility model belongs to the technical field of natural active substance separation devices, and particularly relates to a preparation device of high-purity quercetagetin. The preparation device of the high-purity quercetagetin comprises the crude extraction system, the solvent recovery system, the crude product separation system and the recrystallization separation system, the purpose of combining and optimizing unit operation can be achieved, key links for preparing the high-purity quercetagetin are completed in series connection, the one-time investment cost of equipment is low, and the equipment is suitable for large-scale production. And continuous operation can be realized, and the production efficiency can be improved.

The invention discloses an optimization method and device of a control system, electronic equipment and a storage medium, and relates to the technical field of power system control. And the coordination control strategy is dynamically adjusted based on the first operation parameter generated through optimization so as to deal with the energy matching unbalance problem of the steam turbine and the boiler, and meanwhile, the non-catalytic reduction system is controlled by combining the first operation parameter and the second operation parameter. The problems that in an existing thermal power generating unit control method, due to the fact that traditional control and a single feedback mechanism are adopted, machine-furnace coordination is poor, the ammonia spraying amount is not adjusted in time, and primary frequency modulation response is delayed can be solved, and the technical effects of improving unit operation stability, economical efficiency and environment-friendly standard reaching capacity are achieved.

The invention relates to the technical field of high-temperature gas cooled reactor unit operation monitoring, and discloses a high-temperature gas cooled reactor unit operation monitoring method and a high-temperature gas cooled reactor unit operation monitoring device, which realize quick response of risk monitoring and effectively adapt to dynamic working conditions of parameter fluctuation in a transition reactor core stage through real-time judgment of a superheat degree to generate a trigger condition. Temperature and humidity information is accurately collected based on triggering conditions, stress distribution is calculated in a linkage mode, water erosion influences are simulated, vibration results are analyzed, and the multi-dimensional parameter deviation risk can be pre-judged in time. The lowest safety parameter and the control decision are determined by combining various risk results, so that the potential safety hazards such as turbine blade water erosion, vibration increase and thermal stress overrun caused by overhigh humidity of the low-pressure part of the unit can be effectively avoided, and the operation safety and stability of the high-temperature gas cooled reactor unit are remarkably improved.

A method of monitoring at least one chemical plant (100) is provided. A chemical plant (100) includes a plurality of unit operations. A chemical plant (100) is mapped together with unit operations to a graph structure (110) having a plurality of vertices and a plurality of edges coupled to adjacent vertices. At least one model (200) is associated with at least one of the unit operations and an associated vertex. The model (200) requires at least one input. It is determined which data sources and / or parameters are available in the graph structure (110). It is determined which of the models (200) requires available data sources and / or parameters. Those models that the required inputs are available are automatically deployed.

The application discloses a multi-split refrigerating unit and a control method for uniform refrigerant distribution. The control method comprises the following steps: periodically detecting the temperature and pressure at the outlet of each evaporator; and controlling the flow direction of the adjusting pump between adjacent flow paths according to the range of the difference between the saturation temperatures corresponding to the outlet pressures of the adjacent evaporators, so as to automatically and uniformly distribute the refrigerant flow on the adjacent flow paths. According to the difference between the saturation temperatures corresponding to the outlet pressures of the adjacent flow paths and the range of the outlet superheat, the adjusting pump automatically and uniformly distributes the refrigerant flow of two pipes, so that the refrigerant is uniformly distributed under various working conditions, and the reliability of the unit operation is ensured.

The invention discloses a method and a device for determining start and stop of a coal pulverizing system based on a planned load curve, relates to the technical field of electric power, and mainly aims to improve the operation safety of a unit. According to the main technical scheme, the method comprises the steps that the starting time of a newly-added coal pulverizing system is determined according to a total coal quantity change curve, the overall maximum bearing grinding coal quantity and the longest starting time in all the coal pulverizing systems; and / or according to the total coal quantity change curve, the overall minimum bearing grinding coal quantity and the longest stop time, the stop time of the to-be-stopped coal pulverizing system is determined; determining a to-be-started newly-added coal pulverizing system by utilizing a preset optimization algorithm according to the total coal quantity change curve, the maximum bearing grinding coal quantity of the to-be-started coal pulverizing system which is not operated in each coal pulverizing system, the equipment state information and the historical operation data; and / or determining the coal pulverizing system to be stopped according to the total coal quantity change curve, the maximum bearing grinding coal quantity of each coal pulverizing system in current operation, the equipment state information and the historical operation data by utilizing a preset optimization algorithm.

Systems and methods for flexibly converting crude oil to chemicals and fuels. The systems include unit operations configured to provide flexibility between operating in two different modes for two periods of time. A method includes separating a crude oil, distillate hydrotreating a medium oil fraction resulting from the separation, and operating in a max chemicals mode of operation for a first period of time and in a chemicals plus fuels mode for a second period of time. The method may further include conditioning and hydroprocessing, collectively separating, recovering an unconverted oil fraction, and feeding a light oil fraction, first hydrocarbon fraction, and a diesel fuel fraction or jet fuel fraction to a steam cracker. The system includes a separation unit, a low pressure distillate hydrotreating unit, a separation unit, a steam cracker unit, a separation system, a flow system, and a control system.

Systems and methods for flexibly converting crude oil to chemicals and fuels. The systems include unit operations configured to provide flexibility between operating in two different modes for two periods of time. A method includes separating a crude oil, distillate hydrotreating a medium oil fraction resulting from the separation, and operating in a max chemicals mode of operation for a first period of time and in a chemicals plus fuels mode for a second period of time. The method may further include conditioning and hydroprocessing, collectively separating, recovering an unconverted oil fraction, and feeding a light oil fraction, first hydrocarbon fraction, and a diesel fuel fraction or jet fuel fraction to a steam cracker. The system includes a separation unit, a low pressure distillate hydrotreating unit, a separation unit, a steam cracker unit, a separation system, a flow system, and a control system.

The invention relates to a process strengthening method and system based on ultrasonic cavitation targeted enrichment and pressure relief blasting atomization. The method comprises the following steps: A, a pressurized synergistic cavitation and targeted enrichment step; b, millisecond-level pressure release energy control blasting and atomization; and C, interface instantaneous mass transfer and reaction. According to the process strengthening method, the speed control step of the process is revolutionarily converted into interface behavior control from bulk phase diffusion control, and the order of magnitude of efficiency is improved. The system for implementing the method has the characteristics of high integration, energy coupling, channelization and modularization, various traditional unit operations are replaced by strategic storage and controllable release of energy, energy consumption is greatly reduced, and equipment miniaturization is realized.

The invention discloses a pitch-considered blade sorting method and system based on MATLAB, and the method comprises the following steps: determining the number of blades: determining the number of large-pitch blades, small-pitch blades and special blades participating in sorting according to the actual conditions of product design and assembly; parameters are marked, wherein the pitches, the weights and the weight moments of the large-pitch blades and the small-pitch blades participating in sorting are determined, and the parameters and blade serial numbers are marked; meanwhile, the weight of the special piece is determined; angle conversion: converting the blade pitch into a corresponding angle according to the mounting pitch circle; fixing the position of the special sheet: fixing the position of the special sheet at 0 degree; preliminarily arranging the scheme; and carrying out MATLAB (matrix laboratory) calculation. According to the method, the efficient matrix calculation capability of MATLAB is utilized, the arrangement number and positions of the large and small pitch blades are rapidly and accurately calculated, the balance precision of the assembled wheel disc is improved, a balance foundation is laid for a follow-up overall rotor dynamic balance experiment, and the safety and stability of unit operation are improved.