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

A method is provided, comprising: obtaining, for a chromatography machine including a first dispersed plug flow reactor (DPFR) and a continuous stirred tank reactor (CSTR) prior to a column, and a second DPFR after the column, geometric measurements associated with the second DPFR; generating, by a processor, transport model parameters for a transport model associated with the second DPFR based on the geometric measurements; feeding a tracer molecule into the chromatography machine; capturing one or more tracer molecule measurements based on the tracer molecule traveling through the chromatography machine; and estimating, by the processor, based on the transport model associated with the second DPFR and the one or more tracer molecule measurements based on the tracer molecule traveling through the chromatography machine, one or more transport model parameters for a transport model associated with the first DPFR and the CSTR.

The invention discloses a tracking control method and system for a cascade type continuous stirring reaction kettle time delay system under a state dependence constraint, and belongs to the technical field of automatic control. The method comprises the following steps: acquiring a nonlinear time-lag system model, constrained by state dependence, of a cascade type continuous stirred tank time-lag system based on a mechanism model of the cascade type continuous stirred tank time-lag system; obtaining a time-varying asymmetric Lyapunov function of the cascaded continuous stirred tank reactor based on the nonlinear time-delay system model; and based on the time-varying asymmetric Lyapunov function and the Lyapunov-Krasovski function, obtaining a controller of the continuous stirred tank reactor, and performing tracking control on the cascaded continuous stirred tank reactor through the controller. According to the method, a nonlinear time delay system model subjected to state dependence constraint is taken as a basis, and the influence of time-varying time delay and state dependence constraint on the system performance is eliminated by combining a time-varying asymmetric Lyapunov function and a Lyapunov-Crasovski function.

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 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 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 utility model discloses a novel continuous stirred tank reactor applied to biodiesel production, which comprises a bottom plate and relates to the technical field of biodiesel production. According to the novel continuous stirred tank reactor applied to biodiesel production, filter residues filtered by a filter screen frame are conveniently cleaned through a limiting rod and a spring telescopic rod, and during cleaning, a user pulls the limiting rod to push the filter screen frame on the lower side rightwards; at this time, a limiting rod enables an upper filter screen frame to be inserted into the reactor main body through a notch by virtue of a spring telescopic rod, so that subsequent filtration is facilitated, at the moment, a lower filter screen frame penetrates through the notch and enters a fixed box, and at the moment, filter residues filtered by the filter screen frames can be pressed to extrude out residual waste oil; and then waste oil flows into the reactor main body through the oil inlet, and then filter residues filtered by the filter screen frame below can be cleaned, so that the filter screen frame can be comprehensively cleaned, the situation that normal oil feeding of the waste oil is affected due to blockage of the filter plate is avoided, and the production efficiency is improved.

The present invention relates to a continuous process for preparing a homogeneous chemical formulation comprising at least water, an ionic surfactant and a co-surfactant. The method comprises the steps of: mixing at least one precursor of an ionic surfactant, a co-surfactant and a neutralizing agent by at least one mixing device selected from the group consisting of a continuous stirred tank reactor, a high shear mixer, a mixing pump, a static mixer and a mixing nozzle; and removing the obtained chemical formulation through an outlet. The method is suitable for blending surfactant formulations comprising neutralized components, and is particularly suitable for neutralized components that form gels with water in the absence of co-surfactants.

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 present invention relates to a method for manufacturing a positive electrode active material precursor having excellent sphericity, a uniform particle size distribution, and reduced particle agglomeration by carrying out a reaction for manufacturing a positive electrode active material precursor seed in a continuous stirred tank reactor (CSTR), and introducing the manufactured precursor seed into a batch reactor and growing same, wherein a positive electrode active material precursor particle seed introduced into the batch reactor is introduced in an appropriate amount.

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.

The invention discloses a device for synergistically degrading agriculture and forestry biomass by microorganisms for simulating a termite feeding behavior. The device comprises a pretreatment unit, a termite behavior simulation reaction cabin, a biological reaction system and a product separation and collection unit which are connected in sequence, the pretreatment unit comprises a crushing subunit and an ultrasonic humidifier; the termite behavior simulation reaction cabin comprises a mechanical bionic chewing unit for shearing and crushing agricultural and forestry biomass; the intelligent spraying system is used for spraying complex liquid containing a green surfactant; the microenvironment gradient regulation and control unit is used for simulating a termite intestinal tract gas environment; the time sequence fungicide adding device is used for adding fungi, bacteria and archaea in stages; the biological reaction system comprises a continuous stirred tank reactor; and the product separation and collection unit comprises a solid-liquid separation unit for separating solid residues and liquid products after biological reaction and a gas collection device for collecting and purifying biogas.

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 provides a method for preparing phosphatidylserine through continuous enzyme reaction, and belongs to the technical field of biochemical engineering. The method comprises the following steps: dissolving phosphatidylcholine in an organic phase to obtain a phosphatidylcholine solution, and dissolving L-serine in an aqueous solution to obtain an L-serine solution; the method comprises the following steps: mixing a phosphatidylcholine solution and an L-serine solution to obtain an emulsion, feeding the emulsion into a multi-stage continuous stirring tank reactor, and carrying out transesterification under the action of immobilized enzyme to obtain phosphatidylserine. According to the method for preparing phosphatidylserine through the continuous enzyme reaction, steric hindrance of enzyme and a substrate can be reduced, the catalytic efficiency is improved, and the dosage of the enzyme is greatly reduced; high-purity soybean phosphatidylcholine can be catalyzed, and the adverse effect of the high-purity soybean phosphatidylcholine on the reaction is avoided; according to the method, high-efficiency and high-purity continuous production of phosphatidylserine can be realized, the product does not need to be purified additionally, and the reaction time is shortened to be within 6 hours.

Processes for continuously producing a polymer polyol (“PMPO”). The process includes free-radically polymerizing an ethylenically unsaturated monomer composition in the presence of a base polyol, in which the polymerizing occurs in a continuous stirred tank reactor (“CSTR”) that has an external recirculation loop comprising a pump and a heat exchanger arranged in series with respect to each other. A stream of the reactor contents is (i) continuously removed from the reactor, (ii) then continuously flows through the pump and the heat exchanger, and (iv) then continuously returns to the CSTR. A ratio of reactor system residence time to recirculation loop residence time is 10 to 93.

The present invention provides a parameter identification method for a continuous stirred tank reactor based on the two-stage least squares method, belonging to the technical field of fine chemical process identification, and solves the technical problem of low parameter identification accuracy of the continuous stirred tank reactor. The technical solution is as follows: It includes the following steps: Step 1) Establish a fractional-order Wiener model of the continuous stirred tank reactor; Step 2) Construct an identification process of the two-stage weighted recursive least squares algorithm. The beneficial effect of the present invention is that the two-stage weighted recursive least squares algorithm proposed by the present invention has a fast convergence speed and a high convergence accuracy, and can be well applied to the parameter identification of the continuous stirred tank reactor.

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.

The invention discloses a multi-continuous stirred tank series reactor and a method for hydrodeoxygenation of biological aviation oil, and belongs to the technical field of biomass energy conversion and utilization. The reactor comprises a raw material mixing tank and a plurality of continuous stirring type high-pressure reaction kettles which are sequentially connected in series; the raw material mixing tank is connected with the first continuous stirring type high-pressure reaction kettle through a high-pressure metering pump, and a liquid regulating valve and a one-way valve are arranged between every two adjacent continuous stirring type high-pressure reaction kettles; feeding the suspension in the raw material mixing tank into continuous stirring type high-pressure reaction kettles, and carrying out hydrodeoxygenation reaction in each continuous stirring type high-pressure reaction kettle in sequence; heat transfer in a reaction system is enhanced through efficient stirring of the reaction kettle, so that a temperature field in the reaction kettle is uniform, interaction among a catalyst, an aviation fuel precursor and hydrogen is also enhanced, and the reaction efficiency is improved; by controlling the residence time of the raw materials in each reaction kettle, the problem of temperature runaway caused by reaction heat accumulation is solved, and thermally induced recoalescence coking of the catalyst is inhibited.

The invention relates to methods and apparatus for the recovery of valuable materials from the recycling of photovoltaic panels. Particularly, the method comprises leaching photovoltaic cell particles with a leachant in a continuous stirred tank reactor.

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.

In at least one embodiment, a process to produce a poly alpha-olefin (PAO) includes introducing a first alpha-olefin to a first catalyst system comprising activator and a metallocene compound into a continuous stirred tank reactor or a continuous tubular reactor under first reactor conditions to form a first reactor effluent. The first alpha-olefin is introduced to the reactor at a flow rate of about 100 g / hr or more. The first reactor effluent includes at least 60 wt % of PAO dimer and 40 wt % or less of higher oligomers, where the higher oligomers are oligomers that have a degree of polymerization of 3 or more. The process includes introducing the first reactor effluent and a second alpha-olefin to a second catalyst composition including an acid catalyst in a second reactor to form a second reactor effluent comprising PAO trimer.

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 invention provides an intelligent constraint output feedback control method for a chemical continuous stirred tank reactor (CSTR). The method comprises the following steps: constructing a kinetic model for estimating the concentration and temperature in the CSTR; constructing a state observer through the fuzzy logic system, estimating an unknown state in the CSTR system by using the state observer, and feeding back an estimated value to the fuzzy logic system; a concentration virtual controller of the CSTR system is designed, a barrier Lyapunov function is constructed, a concentration tracking problem is converted into a constraint problem, and a coupling control link from concentration to temperature is realized; based on the output of a concentration virtual controller, a controller is designed to enable the concentration to achieve an expected effect and control the temperature within a safe range, so that intelligent constraint output feedback control of the continuous stirring reaction kettle is realized; according to the invention, the continuous stirred tank reactor CSTR can reach an expected operation state.

The invention belongs to the technical field of computer-aided chemical reactor optimization design and chemical process safety, and discloses an intrinsic safety design method of a continuous stirred tank reactor based on process safety time. As the yield maximization of a target product is one of the most important properties in the reactor optimization design field, the yield maximization is regarded as a target function in a subsequent NLP model. In order to balance conflicts among a plurality of targets, an epsilon-constraint algorithm is adopted. In the optimization design method of the continuous stirred tank reactor based on the process safety time, the design range of the continuous stirred tank reactor which is safer essentially is expanded from a new angle of process safety time constraint so as to deal with the thermal runaway risk caused by accidental faults. The method established by the invention is used for designing the chemical continuous stirred tank reactor, abnormal production cases and dangerous states of potential accidents can be identified and analyzed, and the essential safer design range of the continuous stirred tank reactor is expanded.

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 hidden semi-Markov state estimation method for a continuous stirred tank reactor (CSTR) system, relates to the technical field of industrial process control and state estimation, and aims to solve the problems of low state estimation precision, high communication resource consumption and poor adaptability of modeling and actual reaction characteristics in multi-mode operation of a CSTR. Based on a CSTR core kinetic equation, a state estimation framework fusing a hidden semi-Markov process is constructed, a self-adaptive event triggering mechanism is designed, a data transmission threshold value is dynamically adjusted to reduce communication traffic, a robust estimator is constructed in combination with performance constraints, and accurate estimation of reactant concentration and temperature is achieved. According to the method, the limitation of traditional Markov modeling is broken through, estimation errors are reduced in a multi-mode switching scene, communication traffic is reduced, and the method is suitable for real-time monitoring and optimal control of the CSTR system in chemical production.

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.