29 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.

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 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 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.

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.

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.

This invention relates to the field of fault diagnosis technology for auxiliary equipment in steam turbine generators, specifically a method, system, equipment, and medium for diagnosing dynamic-static rubbing faults in steam-driven feedwater pump sets. The method includes: collecting real-time monitoring data during unit operation; preprocessing and extracting the variation law of shaft vibration with rotational speed, shaft vibration fluctuation pattern characteristics, bearing temperature change characteristics, and shaft vibration frequency component characteristics; determining whether there are precursors to dynamic-static rubbing faults; determining whether a dynamic-static rubbing fault has occurred; identifying the type of dynamic-static rubbing fault; and performing step-by-step root cause verification based on the type of dynamic-static rubbing fault to obtain the fault location. This invention enables early and rapid diagnosis of dynamic-static rubbing faults without disassembling the equipment, accurately distinguishes between single dynamic-static rubbing faults and compound faults involving combined dynamic-static rubbing and insufficient bearing stability, and achieves precise location of the fault root cause through step-by-step verification, reducing fault handling costs and equipment downtime, and improving on-site fault handling efficiency.

The present application relates to a kind of high-gas group accident control method after unit fast stabilization, when the unit high-gas group is decoupled, the operation state of the unit is adjusted by quickly reducing the water intake of boiler and reducing the real-time target load of unit, so that the load and main steam parameter of unit quickly reach stable state after high-gas group decoupling.In the present application, according to the unit high-gas decoupling unit condition, the feedwater flow is quickly reduced, and the main steam temperature can be controlled well in closed-loop mode while ensuring the working environment of desuperheating water, and a new balance can be quickly established to stabilize the unit operation;It greatly reduces the monitoring and operation workload of operating personnel, reduces the work misoperation, and ensures the safety of unit and power grid.

This disclosure provides a method for single-unit operation testing of air coolers in a high-temperature gas-cooled reactor generator. The method includes: filling both air coolers with cooling water, shutting down one air cooler while maintaining normal operation of the other air cooler to conduct a water-loaded test; and shutting down one air cooler and releasing the cooling water therein, while maintaining normal operation of the other air cooler to conduct a waterless test. During the water-loaded and waterless tests, the cooling effect of each air cooler on the generator is determined based on its operating status. The generator power is adjusted, and the above test steps are repeated to determine the cooling effect of each air cooler on generators at different power levels. This method can perform single-unit operation capability testing of air coolers. The test is reasonable and feasible, with good results, meeting the testing requirements of the commissioning phase before air cooler use. Furthermore, it can simulate operating conditions and is simple, efficient, highly applicable, and widely applicable.

The invention provides a fault shutdown control method for an air energy storage series compressor unit, and belongs to the technical field of air energy storage series compressor units, and the method comprises the steps: carrying out early warning shutdown protection before parameters meet alarm conditions but an interlocking fault is not reached, and taking the early warning shutdown protection as a third shutdown control logic except normal shutdown and interlocking shutdown; and a brand new control level is formed. When parameters are abnormal but do not reach a fault interlocking value enough to cause equipment damage, the compressor unit is actively intervened in advance, the compressor unit is controlled to execute safe unloading and lossless parking, and parking protection logic is added before fault interlocking of unit operation so as to control the unit to be safely parked in advance. Damage shutdown of the unit caused by interlocking shutdown is avoided from the source; due to the fact that safe unloading of the unit is completed in the early warning stage, the unit can be stopped in a lossless mode, impact damage to a compressor, a gear box and other key mechanical parts is eliminated, and heavy economic losses caused by equipment damage are directly avoided.

A modular device for a fixed arrangement and interconnection of individual separation units and / or first functional units for performing one or more unit operations in a biotechnological process. The modular device includes a plurality of distributor caps provided for attachment to the separation units and / or first functional units. The distributor caps each have: a fluid distribution mechanism having a working connection and at least two supply or discharge connections, wherein the fluid distribution mechanism can assume at least two defined switching positions; connection mechanisms for establishing a flow communication between a fluid inlet or outlet of the separation unit or the first functional unit and the working connection of the fluid distribution mechanism; coupling mechanisms for establishing a rigid mechanical coupling and a flow communication with an adjacent distributor cap; and an interface for changing the switching positions of the fluid distribution mechanism.

The present application relates to a water turbine unit equipment rotation method based on group representation theory and rotation voting algorithm, comprising: establishing a permutation group having an isomorphic relationship with the unit equipment rotation logic; constructing a linear space and a base vector corresponding to the permutation group; determining the state and level of the unit equipment; determining the conjugate class of the permutation group and the corresponding matrix group element; determining the trigger condition of the unit equipment rotation; and calculating the new order of the main and standby equipment in a descending order k-rotation manner. The equipment rotation voting algorithm of the present application realizes the scientific and reasonable rotation and standby of the water turbine unit equipment, and the number of equipment used for rotation is not limited, improving the reliability of the water turbine unit operation, and solving the problems of algorithm complexity, program logic redundancy, poor readability, and difficult to find and troubleshoot logical errors in the design of the equipment rotation logic algorithm relying on experience and enumeration method.

The embodiment of the application provides a heat pump system control method, a controller, a heat pump system and a storage medium, comprising: acquiring an actual condensing temperature of the heat pump system, a set required water temperature of a hydraulic module and an actual outlet water temperature; determining a target condensing temperature according to the set required water temperature, the actual outlet water temperature and a target correction value; and controlling the operating frequency of the compressor according to the actual condensing temperature and the target condensing temperature. Since the embodiment of the application can determine the target correction value according to the water temperature parameter of the hydraulic module and / or the continuous operating time of the compressor, and revise the target condensing temperature, the target condensing temperature can be automatically adjusted according to the change of the load demand on the basis of the target condensing temperature control method, so as to achieve the operation rule of low condensing temperature under low load demand and high condensing temperature under high load demand, and then the reliability of the unit operation can be ensured, the low energy consumption can be achieved, and the use demand of the user can be met at the same time.

The invention belongs to a unit operation control method, and provides a gas-steam combined cycle unit operation control method and a related device for solving the technical problem that a traditional automatic start-stop control system is difficult to meet the strict requirements of a novel electric power system for safe, stable and economical operation of a gas-steam combined cycle unit. Time sequence operation data in the production process of the gas-steam combined cycle unit are input into the abnormity early warning model, warning information is obtained, the abnormity early warning model carries out early warning on the performance and faults of the gas-steam combined cycle unit, and the abnormity early warning model is a model constructed based on a modeling method combining a mechanism and mathematical theory and carries out early warning on the performance and faults of the gas-steam combined cycle unit. And inputting the alarm information into the abnormity diagnosis model to obtain a diagnosis report. And analyzing the diagnosis report to obtain a control instruction for adjusting the operation of the gas-steam combined cycle unit. Therefore, closed-loop autonomous operation under the abnormal condition of the unit can be realized.

Systems and methods for synthesizing chemical products, including active pharmaceutical ingredients, are provided. Certain of the systems and methods described herein are capable of manufacturing multiple chemical products without the need to fluidically connect or disconnect unit operations when switching from one making chemical product to making another chemical product.

The application discloses a boiler combustion optimization method and system based on an AGC mode and an adjusting system, and relates to the field of combustion control of thermal power plants. According to multiple influence factors and AGC instructions issued by a power grid, the related parameters of the boiler are adjusted until the rated load of the boiler combustion is kept within a first preset range. The scheme comprehensively uses multiple influence factors of the stable combustion capability during deep peak regulation obtained according to the combustion degree of a furnace to control the furnace air leakage rate, improve the drying output of a pulverizing system, adjust the secondary air distribution, improve the plasma combustion support, optimize the operation mode of the pulverizing system and the like, so that the minimum technical output of the boiler is reduced to 15% of the design output, the deep peak regulation capability range of the unit is effectively expanded, and the stability, safety and economy of the unit operation are ensured.

The application discloses a kind of combined cycle unit cold end optimization methods considering unit operation state deviation, comprising the following steps: calculating the theoretical back pressure value and unit net power increase value under each cold end operating mode, and the system correction value obtained by calculating theoretical back pressure value;Based on system correction value, obtain the corrected theoretical back pressure value under each cold end operating mode, and then obtain the corrected theoretical optimal back pressure and corresponding optimal cold end operating mode and as initial optimization result;The rationality of initial optimization result is checked, and the final optimization result is determined based on the checking result.The application can obtain a higher accuracy calculation result by collecting system operating parameters to correct the system deviation caused by the change of unit operation state;And it also has good applicability to the operating conditions of extreme situations such as accident blowdown, condenser vacuum leakage, etc.

The invention discloses a method and system for checking a power generation plan of a power plant, and relates to the technical field of power management, and the method comprises the steps: collecting unit operation data, carrying out the preprocessing, and generating a role label set; according to the role label set, the monthly power generation plan task of the power plant is split into target spliced disks, and a mapping relation table is formed; in the unit operation process, performing matching assessment on the real-time operation trajectory of each unit according to the mapping relationship between the unit role and the target spliced disk to obtain an assessment state sequence of each unit; and performing unit-by-unit mapping on the assessment state sequence of each unit and the role tag of each unit, and generating a unit assessment result and a role improvement suggestion list. In the unit operation process, the real-time operation track and the target splicing disk are matched and assessed, the assessment state sequence is generated, the continuity and the real-time performance of assessment are ensured, and problems can be found and adjusted in time.