14 results about "Continuous stirred-tank reactor" patented technology

The invention provides an anti-interference control method for the concentration of a main reactant in a continuous stirring reaction kettle process, belongs to the technical field of chemical process control, and solves the problem that in the chemical process of producing cyclopentanol by catalyzing electrophilic water with cyclopentadienoic acid, the concentration of the main reactant is not influenced. The technical problem that the concentration of a main reactant is difficult to track a set value without steady-state errors under the conditions of fluctuation of feeding concentration, uncertainty and external disturbance of the continuous stirring reaction kettle is solved. According to the technical scheme, the method comprises the steps of constructing a model pre-estimation compensator and an anti-interference control structure, designing a four-dimensional decision model, carrying out parameter collaborative optimization by adopting a multi-target genetic optimization algorithm, and carrying out optimal solution selection based on a TOPSIS method. Under the condition of feed concentration fluctuation, the dynamic response speed and the anti-interference capability of the system can be remarkably improved, and faster adjustment time, smaller overshoot and stronger robustness can be realized in linear and nonlinear models.

The invention discloses a device and a method for strengthening the denitrification efficiency of Fammox based on an extracellular electron transfer regulation and control strategy. The device comprises a CSTR (continuous stirred tank reactor) main body, a water inlet and outlet system, a stirring and constant temperature device, an aeration and anaerobic maintenance device and an EET (ethylene terephthalate) enhanced feeding device, the temperature, the stirring speed and the inlet water iron ion concentration in the Fammox reactor are accurately regulated and controlled, and the L-cysteine and the corn straw biochar are added, so that the electron transfer efficiency and the iron matrix utilization rate in the reaction are effectively improved, and the nitrogen removal efficiency and the Fe (III) utilization and reduction rate are remarkably improved. The L-cysteine and the corn straw biochar adopted by the invention have relatively good economical efficiency and environmental protection property, the denitrification efficiency of Fammox can be remarkably improved, and the utilization and reduction capability of ferric iron (Fe (III)) is effectively enhanced.

A SCALABLE MICROWAVE-ASSISTED CONTINUOUS FLOW METHOD FOR SYNTHESIS OF PLATINUM ON CARBON CATALYST AND A SYSTEM THEREOF The present invention relates to a microwave-assisted continuous flow process for synthesis of platinum on carbon catalyst with shorter residence times and providing a high throughput. Further, the present invention relates to a microwave-assisted continuous flow system comprising two or more continuous stirred tank reactors (2 and 3) connected in series and placed in a microwave oven (6) for synthesizing platinum on carbon (Pt / C). Ref. Figure 1

The present application relates to an American Society of Mechanical Engineers (ASME) Bioprocessing Equipment (BPE) compliant continuous stirred tank reactor (CSTR) array designed for continuous chemical, pharmaceutical, and biotechnological applications. Each array features two to five CSTRs incorporating a comprehensive recirculation and output flow system with a positive displacement pump, a three-way recirculation diverter valve, and control valves for precise management of output and waste allowing handling of solutions, suspensions, and mixtures of fluids, solids, and gases. Additional features support easy maintenance and real-time process monitoring, enhancing operational flexibility and control. This CSTR system is tailored to meet stringent industry standards and improve process efficiency.

The application provides an intelligent constraint output feedback control method for a chemical continuous stirred tank reactor, and the method comprises the following steps: constructing a kinetic model for estimating the concentration and temperature inside the continuous stirred tank reactor (CSTR); constructing a state observer through a fuzzy logic system, estimating the unknown state inside the CSTR system by using the state observer, and feeding back the estimated value to the fuzzy logic system; designing a concentration virtual controller of the CSTR system, constructing an obstacle Lyapunov function, converting the concentration tracking problem into a constraint problem, realizing the coupling control link from the concentration to the temperature; based on the output of the concentration virtual controller, designing a controller to make the concentration reach the desired effect and control the temperature in the safe range, realizing the intelligent constraint output feedback control of the continuous stirred tank reactor; and the application realizes that the continuous stirred tank reactor (CSTR) can reach the desired operating state.

The invention discloses a continuous stirring reaction kettle operation state monitoring method based on time sequence data analysis, and relates to the technical field of process state monitoring, and the method comprises the following steps: collecting multi-source operation time sequence data comprising stirring motor driving signals, material components, temperature and pressure, and product quality; performing cross-domain correlation analysis on the driving signal and the material components, and identifying a coupling correlation mode; dynamic process segmentation is performed on the temperature and pressure data based on the mode, and feature fragments of all reaction stages are extracted; constructing a causal inference network model between the feature fragments and the product quality; reversely tracing key process intervals and features influencing quality through the model, and generating a process traceability report; and judging the comprehensive operation state of the reaction kettle. According to the method, the accuracy and interpretability of state monitoring are improved by revealing process internal association and realizing causal traceability.

A method for producing bis-2-hydroxyethyl terephthalate is disclosed. The method includes the steps of: (1) adding a waste polyester raw material into a co-extruder to obtain a co-extrudate; (2) adding the co-extrudate into a reactor with an agitation shaft and depolymerizing same to obtain a first reaction product; (3) adding the first reaction product into a first continuous stirred tank reactor and depolymerizing same to obtain a second reaction product; and (4) adding the second reaction product into a second continuous stirred tank reactor and depolymerizing same to obtain a third reaction product.

The invention belongs to the technical field of chemical engineering, and particularly relates to a catalyst and process applied to continuous production of benzaldehyde, and the process comprises the following steps: S1, raw material preparation and preheating feeding, S2, gradient temperature control hydrolysis reaction, S3, two-phase separation and water phase circulation, and S4, product refining and tail gas treatment. A three-stage series continuous stirred tank reactor is adopted, a gradient heating strategy is implemented along the material flow direction, and the setting of the reaction temperature and the stirring intensity of each stage accurately adapts to the dynamic characteristics of each stage of the hydrolysis reaction; the problem of unstable product quality caused by temperature fluctuation and batch difference in an intermittent kettle process is avoided, and process upgrading from intermittent operation to continuous stable production is realized; the catalyst comprises imidazolium ionic liquid and quaternary ammonium salt, and meanwhile, organic carboxylic acid alkali metal salt is compounded, so that the activity of a catalyst system is kept in multiple times of cyclic application.

The invention relates to a system and method for removing hydrogen cyanide in blast furnace gas, and belongs to the technical field of ferrous metallurgy waste gas purification. The system comprises a spray washing unit and a wastewater treatment unit, and the spray washing unit is provided with a multi-stage spray washing tower and is used for absorbing hydrogen cyanide in blast furnace gas through alkali liquor countercurrent washing. The wastewater treatment unit is provided with continuous stirred tank reactors connected in series, an inlet of the continuous stirred tank reactors is connected with a water outlet of the multi-stage spray washing tower, and the continuous stirred tank reactors are used for performing catalytic oxidation treatment on generated cyanide-containing wastewater. By integrating gas-phase washing and liquid-phase deep oxidation, hydrogen cyanide is efficiently removed from the source, secondary pollution is thoroughly eliminated, the system has the capacity of adapting to load fluctuation, and a complete technical scheme is provided for solving the problem of treatment of hydrogen cyanide in blast furnace gas.

This invention discloses an adaptive closed-loop control method and system for a continuous stirred tank reactor, relating to the field of continuous stirred tank reactor control technology. The method acquires a preset homogeneous evolution model; performs multi-rate sampling through target nodes to obtain monitoring feature data; uses an attack assessment model to identify random spoofing attack characteristics of the communication channel and performs cleaning and noise reduction to obtain a measured data stream; calculates the data deviation, and when it exceeds a preset evolution threshold, uses the measured data stream as trigger data; inputs the trigger data into a preset distributed filter, solves the local filter gain to generate local state estimates, and weights and fuses these estimates to obtain global state estimates; finally, it compares the estimated state with a preset target state value to generate a state deviation signal, corrects the local filter gain, and generates an execution compensation control command. This invention effectively overcomes interference from multi-rate sampling, network attacks, and bandwidth limitations, achieving high-precision and robust adaptive closed-loop control of the reactor.

The application discloses a continuous synthesis method of 2-chloro-4-amino-5-methylpyridine, which is prepared from 2-chloro-5-methylpyridine as a starting material, and the continuous synthesis of 2-chloro-5-methylpyridine N-oxide is first carried out in a fixed bed reactor by using titanium silicalite catalyst, then the continuous nitration synthesis of 2-chloro-4-nitro-5-methylpyridine N-oxide is carried out in a microreactor by using SO3 / concentrated nitric acid, and the continuous hydrogenation synthesis of 2-chloro-4-amino-5-methylpyridine is carried out in a continuous stirred tank reactor by using Raney nickel catalyst. Through the above three-step continuous reaction, the total yield of 2-chloro-4-amino-5-methylpyridine can reach more than 80%, and the synthesis method is simple, three-waste is less, and has good economic effect and environmental effect.

The application discloses a method for preparing hexabenzyl hexaazaisowurtzitane (HBIW) by using a continuous stirred tank reactor (CSTR), which can improve the yield of HBIW and significantly shorten the reaction time. First, a mixed solution of acetonitrile and water, benzylamine and glyoxal are simultaneously sent into CSTR-1 by injection pumps for mixing reaction, after 40 minutes of reaction, the post-reaction solution is sent into CSTR-2 by a peristaltic pump, and formic acid is sent into CSTR-2 by an injection pump, and then mixed reaction is carried out for 40 minutes, so that the product HBIW is obtained, and the yield of HBIW is increased to 87.56%. The CSTR has the basic characteristics of high mass transfer and high heat transfer, high specific surface area and higher safety, the material is highly mixed in the reaction process, and the method is more efficient and environmental protection. Meanwhile, the method has the advantages of simple reaction process, easy large-scale continuous production and high yield.

Heavy vacuum gas oil is converted into lighter products using a continuous stirred tank reactor. The invention relates to a continuous stirred tank reactor that enables the conversion of heavy vacuum gas oil (HVGO), obtained from the vacuum distillation unit in petroleum refineries, into lighter products suitable for use as fuel through catalytic cracking under inert conditions.

The invention discloses a distributed safety estimation method for a tank reactor system based on a rolling time domain, and belongs to the technical field of information physical system safety, and the method comprises the steps: building a discretization linear state space model of a continuous stirred tank reactor through building a multi-sensor network topology; two associated Bernoulli variables are introduced to describe a hybrid attack model in which denial of service attack and false data injection attack coexist, and zero-order retention compensation is adopted when DoS occurs; designing a distributed rolling time domain estimator for each node, and locally optimizing target function fusion measurement fitting degree, prior deviation and neighbor consistency; solving to output the current state estimation under the condition of meeting the dynamic constraint of the system; and a linear matrix inequality proves that the estimation error is consistent and finally bounded under the mean square meaning. According to the method, Gaussian noise hypothesis is not needed, bounded non-Gaussian disturbance is effectively dealt with, online, real-time and high-robustness state estimation is achieved, and safe operation of the reactor in an information physical environment is guaranteed.