Astringe detecting probe method used for large scale varying duty real time process flow simulate

The invention discloses a probe-converging method for large-scale variable condition real-time process simulation. The method uses the obtained solution from the initial condition simulation in the real-time process simulation as the initial value to perform the process simulation of objective condition; when a solver fails to obtain the solution directly, the method is able to adjust condition parameters, select a searching method, and find middle condition points with a certain sequence, and by using these middle condition points, after a series of simulation operations the solver can obtain a group of initial values, which can be convergent, to solve the process simulation of the objective condition. Compared with the traditional real-time process simulation method, the invention can enhance the ratio of successful convergence of work condition real-time simulation, and solve the problem of bad convergence in the prior large-scale complicated chemical process real-time simulation. The ...

Method for preventing and controlling nitrogen blockage of argon preparation system of space division device

The invention discloses a method for preventing and controlling the nitrogen blockage of an argon preparation system of a space division device, which comprises the following steps: selecting measurement values of all important indexes of the argon content of an argon fraction, the argon fraction temperature, the argon content of the top of a rough argon tower II and the oxygen purity of a product as controlled variables, wherein the argon content of the argon fraction and the argon fraction temperature are used as a first defensive line for monitoring nitrogen blockage, the argon content of the top of the rough argon tower II is used as a second defensive line, the two defensive lines are used for directly and accurately reflecting whether the argon preparation system generates the nitrogen blockage or not, and the oxygen purity of the product is used for reflecting whether the working condition of a main tower is stable or not; selecting the oxygen taking content, the pure liquid nitrogen ...

Multicore parallel solving method for computation of polymer molecular weight distribution

The invention discloses a multicore parallel solving method for the computation of polymer molecular weight distribution, comprising the following steps of: establishing a mechanism model of free radical polymerization dynamic simulation to solve the polymer molecular weight distribution by taking the free radical polymerization dynamic simulation as an object; dividing the mechanism model into asmall-scale free radical polymerization model and a large-scale free radical polymerization model through a decoupling method; solving the small-scale free radical polymerization model by utilizing avariable step-size and order backward difference method; and solving the large-scale free radical polymerization model to accelerate the solution of the computation of the polymer molecular weight distribution through a parallel sequential method by taking a multicore computer system as a computing platform. Compared with the traditional non-parallel solving method of the computation of the polymer molecular ...

Method for preparing taurine

The invention discloses a preparation method for taurine which comprises the following steps that: 1. ethylene thioglycol is oxidized by oxidizer in the solvent to prepare hydroxyethylsulfonate; 2. the hydroxyethylsulfonate is reacted with ammonia to prepare taurine. The preparation method for taurine of the invention has short process route and low cost. The first-step oxidation reaction has mild conditions, can be made at normal temperature and has low energy consumption. The total reaction process has no waste liquid and waste residue, and no escape of sulfur dioxide gas, so the production environment is good. Compared with the prior commonly used method, the preparation method is more clean, can reduce large power consumption and manpower consumption, and the reaction yield can be improved by 20 percent compared with the general process.

Method for preparing 4-hydroxy-4-methyl-2-pentanone

The invention provides a method for preparing 4-hydroxy-4-methyl-2-pentanone. The method is characterized by comprising the following steps of: adding acetone into a distillation still and carrying out steam heating to obtain acetone steam; cooling the acetone steam to 0-40 DEG C by low-temperature chilled water; adding the cooled acetone steam into a reactor containing a catalyst to react; after the temperature of the distillation still reaches 120 DEG C through continuous distillation reactions, stopping reacting; and filling reaction liquid into the distillation still and separating the reaction liquid to obtain high-purity 4-hydroxy-4-methyl-2-pentanone. The method for preparing the 4-hydroxy-4-methyl-2-pentanone uses the acetone as a raw material and treated ion exchange resin and magnesium hydroxide as a mixed catalyst. Through the continuous distillation reactions, the reaction time is shorter, and more energy can be saved; side reactions are fewer, and the product quality is better ...

Device for ejecting and absorbing ammonia

The invention provides a device for ejecting and absorbing ammonia. The device comprises a reactor (1); the lower part of the reactor (1) is provided with a material outlet (2) which is connected witha material pipe (3), and the material pipe (3) is connected with a material mixer (6) at the upper part of the reactor (1) after being connected with a material pump (4) and a heat exchanger (5); andthe material mixer (6) is provided with an epoxy inlet (7), the material mixer (6) is connected with an injector (8), and the injector (8) is arranged at the top part of the reactor (1). In the device for ejecting and absorbing the ammonia, the material pipe arranged outside the reactor is utilized to mix ammonia and epoxy in the material mixer firstly, and then the injector is used to inject themixed ammonia and epoxy into the reactor so that the even distribution of materials can be ensured, and the uniform generation of reaction is ensured.

Method for preparing piperidine nitroxide radical polymerization inhibitor

The invention provides a method for preparing a piperidine nitroxide radical polymerization inhibitor, which has the following advantages: 1. reaction time is short, reaction condition is mild, and operation is simpler; 2. a used catalyst has lower price and low cost , is convenient for separation and can be reused; 3. yield is high; and 4. water is used as a solvent, and can be evaporated to dryness without generating any waste liquid or waste water or no pollution to the environment, thereby realizing real zero emission in industrial production. Therefore, the method is more convenient for industrialized production of piperidine nitroxide radical.

Horizontal type distilling still used for preparing diacetone

The invention provides a horizontal type distilling still used for preparing diacetone, which comprises a horizontally arranged still body (1) that is internally provided with parallel heating pipes (2), and steam inlets (3) and steam outlets (4) are arranged on the parallel heating pipes (2). According to the horizontal type distilling still used for preparing the diacetone, the horizontal type distilling still and the parallel heating pipes are adopted, thus the heat exchange area is increased, the energy exchange effect is provided, and the flooding is reduced, therefore, the tower effect is greatly provided. In addition, the distilling still is further enlarged possibly, thereby being capable of greatly improving the production efficiency.

Pipeline mixing device for producing aminohexylsulfonic acid

The invention provides a pipeline mixing device for producing aminohexylsulfonic acid, which is characterized by comprising a reaction pipe (1); the reaction pipe (1) is provided with a material inlet(2) and a material outlet (3); the reaction pipe (1) is placed in a heating cavity (4); and the heating cavity (4) is provided with a heating medium inlet (5) and a heating medium outlet (6). The pipeline mixing device for producing the aminohexylsulfonic acid uses the reaction pipe as a reaction container to reduce the wall thickness, is convenient for heating by using a heating medium, has goodheat transfer effect and high reaction safety, can input materials from the material inlet during material reaction, and can output the reacted materials from the material outlet, thereby realizing continuous production processes and improving the production efficiency.

Operating condition optimization method for molecular weight distribution of free radical polymer

The invention discloses an operating condition optimization method for molecular weight distribution of a free radical polymer. A given molecular weight distribution curve is used as a product index for a free radical polymerization model, and a reaction temperature condition and reaction time are solved for keeping the maximum conversion rate of a reactant on the premise of meeting the product index. The method comprises the following steps of: taking a specific point on a target molecular weight distribution curve; taking polymer concentration values corresponding to a top point and a pointwith concentration being half of that of the top point as constraints in an optimal problem; obtaining an optimizing result through a control variable discretization method; performing analog computation on the molecular weight distribution by taking the result as an initial value; comparing error with the given molecular weight distribution curve; and optimizing through a random initial value reassignment ...

Distilling tower for preparing diacetone

The invention provides a distilling tower for preparing diacetone, which comprises a tower body (1). The distilling tower for preparing diacetone is characterized in that a screen type filler (2) is arranged in the tower body (1), and a distributor (2) is also arranged in the tower body (1). Preferably, the distributor (1) is a groove disk type distributor, and the distributor (1) is a dog tooth type distributor. Additionally provided with the filler and the distributor, the distilling tower provided by the invention can effectively reduce entrainment clamping and improve the distilling effect and distilling efficiency. Additionally provided with the filler and the distributor, the distilling tower has greatly reduced height, and can improve the finished product yield and reduce the equipment cost and the preparation difficulty.

Nesting optimizing method for solving heat exchange network integration

The invention discloses a nested optimization method for solving heat exchanger network synthesis. The method decomposes the problem of heat exchanger network synthesis into two nested parts including network topology optimization and heat exchanging element parameter optimization. The taboo search method is used to implement the network topology combinatorial optimization on an outer layer, and on an inner layer, a corresponding model is automatically built for the heat exchanger network of the given topological structure and a sequential quadratic programming method is used to execute the parameter optimization. Compared with the traditional optimization method of the heat exchanger network synthesis, the method has a concise and clear principle, is easy to be implemented, and has overall optimality and fast convergence.

Multicore parallel solving method for computation of polymer molecular weight distribution

The invention discloses a multicore parallel solving method for the computation of polymer molecular weight distribution, comprising the following steps of: establishing a mechanism model of free radical polymerization dynamic simulation to solve the polymer molecular weight distribution by taking the free radical polymerization dynamic simulation as an object; dividing the mechanism model into a small-scale free radical polymerization model and a large-scale free radical polymerization model through a decoupling method; solving the small-scale free radical polymerization model by utilizing a variable step-size and order backward difference method; and solving the large-scale free radical polymerization model to accelerate the solution of the computation of the polymer molecular weight distribution through a parallel sequential method by taking a multicore computer system as a computing platform. Compared with the traditional non-parallel solving method of the computation of the polymer ...

High-pressure reaction tower

The invention provides a high-pressure reaction tower, which comprises a reaction tower (1), a material feeding pipe (2) and a material discharging pipe (3). The high-pressure reaction tower is characterized in that a heating cavity (4) is formed outside the material feeding pipe (2), an inlet (5) and an outlet (6) are formed on the heating cavity (4), and the inlet (5) is connected with the material discharging pipe (3). The high-pressure reaction tower provided by the invention adopts the structure that the material discharging pipe is connected with the heating cavity, the material feedingpipe is placed in the heating cavity, and the energy of flashed mixture gas can be utilized to heat a reaction solution during the former procedures, so both the energy of the mixture and the energy required by heating an aminolysis solution are reduced. Therefore, the requirement for the equipment during the subsequent procedures is lowered, and the use amount of cold energy is greatly reduced during ...

Method for setting thermodynamic parameters for multi-stage separation process of high-purity system

The invention relates to a method for setting thermodynamic parameters for a multi-stage separation process of a high-purity system. The method comprises the following steps: 1) establishing a calculation model in a chemical process: establishing a basic equation describing a thermodynamic method and the chemical process according to a chemical device; 2) carrying out sensitivity analysis for allthermodynamic parameters and procedure parameters in the calculation model so as to determine a parameter to be set; and 3) selecting a key measuring location number therein for parameter setting according to the characteristic of an object process system, acquiring a plurality of groups of measuring data for a plurality of measurement variables on each operating point and obtaining the setting results of the thermodynamic parameters via optimization calculation. The invention provides a method convenient for measuring and suitable for setting the thermodynamic parameters in the multi-stage separation ...

Automatic discharging device

The invention provides an automatic discharging device, which comprises a centrifugal machine (1). The centrifugal machine (1) comprises an inner drum (2) and a shell (3). The automatic discharging device is characterized in that: the inside of the shell (3) is provided with a scraper (7), one end of the centrifugal machine (1) is provided with a discharge hole (4), the underside of the dischargehole (4) is provided with a guide rail (5), and a skip (6) is arranged on the guide rail (5). In the automatic discharging device provided by the invention, because the inside of the shell of the centrifugal machine is provided with the scraper, when the centrifugal machine rotates, the scraper automatically scrapes a material, then the scraped material automatically falls into the skip through the discharge hole, and the skip arranged on the guide rail can carry the material conveniently so as to finish automatic discharging with high automation degree and high work efficiency.

Astringe detecting probe method used for large scale varying duty real time process flow simulation

Data correction method used for varying data of chemical engineering flow system

The invention discloses a data correction method under the condition of variable load of a chemical flow system. The method comprises the following steps: firstly, acquiring measuring data of a measuring instrument within a period of time, and applying steady state detection technology for steady state determination according to key measuring bits among the measuring data; secondly, taking mean values of the measuring data in various steady states, performing steady state operating condition interval division on the mean values of the steady state data according to the load, and dividing the mean values into a plurality of different steady state operating condition intervals; and thirdly, performing data correction and remarkable error detection on multi-variable multi-group measuring data in each steady state operating condition interval, and obtaining remarkable error detection results and data correction results of various steady state operating condition intervals. The method has more ...

Method for expanding compatibility of Aspen Plus to non-linear programming solver based on CAPE-OPEN

The invention discloses a method for expanding the compatibility of Aspen Plus for a nonlinear programming solver based on CAPE-OPEN. The method ensures that the compatibility o f Aspen Plus on the aspect of optimizing the solver is expanded, so that the Aspen Plus supports the optimization solver based on open computer aided process engineering. Aspen Plus interacts with the external nonlinear programming solver through the interface set of an open solver. In order to standardize the interaction between the Aspen Plus and the external solver, and well realize the integration and interoperability among software, a layer of middleware based on OI is realized between AOS and the external solver by adopting the technology of component object model and utilizing standard optimizing interface set issued by CAPE-OPEN laboratory network organization aiming at a mixed integer nonlinear programming. The invention ensures that the Aspen Plus can obtain and use an optimization algorithm with a better ...

Preparation method of amino-substituted hydrocarbyl sulfonic acid

The invention provides a preparation method of amino-substituted hydrocarbyl sulfonic acid, which is characterized by comprising the following steps of: carrying out substitution reaction by taking esters of amino-substituted hydrocarbyl alcohol as raw materials and sulphite as a nucleophilic substitution reagent at high temperature and high pressure, concentrating and separating for desalination after reaction so that a coarse product of the amino-substituted hydrocarbyl sulfonic acid is obtained, and then purifying and crystallizing the coarse product so that the finished product of the amino-substituted hydrocarbyl sulfonic acid is obtained. The preparation method of the amino-substituted hydrocarbyl sulfonic acid is used for carrying out the substitution reaction at high temperature and high pressure by using the esters of the amino-substituted hydrocarbyl alcohol as raw materials and the sulphite as the nucleophilic substitution reagent so as to have the advantages of short reaction ...

Model expansion method used for correcting model defect in Aspen Plus

The invention discloses a model extension method which can modify the defects of modes in Aspen Plus. The method aims at the defects of the models and comprises: a user inputs the models which need to be supplemented through a text file; a model resolver is utilized to process to analyze for the models; then extension models and original models are syncretized. An optimization algorithm obtains information of the complete model via an interface defined by the invention and processes solving, wherein first derivative information of the extension models is obtained via numerical difference or automatic differentiation technology. The model extension method of the invention makes up for the defects of Aspen Plus in the modeling process so that the optimal solution obtained via the optimization algorithm is more accurate and reliable, is very simple, and has easy operation and convenient maintenance.

Parameter estimation method for multi-condition and large-scale chemical process model

The invention discloses a parameter estimation method for a multi-condition and large-scale chemical process model. The parameter estimation method aims at the problem of parameter estimation of the multi-condition and large-scale chemical process model, and in the method, multi-condition field measurement information is utilized, a simultaneous parameter estimation proposition is constructed, targets are adjusted in batch according to specific rules when direct solution is difficult for successful convergence, constraints are gradually added, a sequential parameter estimation optimization proposition is constructed, a solver is enabled to gradually solve successfully, at last the simultaneous parameter estimation proposition is solved on basis of a new initial value to ensure successful convergence of the solving. Compared with a traditional parameter estimation method, the method has higher convergence reliability, simple and clear principle, easy implementation and good portability.

Preparation of piperidine nitroxyl radical anti-polymerization inhibitor

The invention provides a method for preparing a piperidine nitrogen oxygen-derived free radical polymerization inhibitor, which has the advantages that: firstly, the reaction time is short, the reaction condition is mild, and the operation is simpler; secondly, a catalyst has cheaper price and low cost, is convenient to separate, and can be reused; thirdly, the yield is higher; and fourthly, water is taken as a solvent, and the method for direct drying by distillation cannot generate waste solution and wastewater, does not pollute the environment, and realizes zero release in industrial production in a real sense. Therefore, the method is a method for preparing piperidine nitrogen oxygen-derived free radicals, and provides convenience for industrial production.

Distillation column for preparing diacetone

The present invention provides a distillation column for preparing diacetone. The distillation column comprises a column body (1), and is characterized in that a condenser (2) is connected to the top of the column body (1); the condenser (2) is connected with an evaporation pipe (3); and the evaporation pipe (3) is connected with a collector (4) and the column body (1). According to the distillation column for preparing diacetone of the present invention, the internal reflux structure is changed into an external reflux structure; the condenser is disposed outside the column body; and liquid substances outputted from the evaporation pipe enter into the collector or the column body controllably, so the controllability of the balance in the column body is achieved and the separation effect is improved greatly.

Model expansion method used for correcting model defect in Aspen Plus

The invention discloses a model extension method which can modify the defects of modes in Aspen Plus. The method aims at the defects of the models and comprises: a user inputs the models which need to be supplemented through a text file; a model resolver is utilized to process to analyze for the models; then extension models and original models are syncretized. An optimization algorithm obtains information of the complete model via an interface defined by the invention and processes solving, wherein first derivative information of the extension models is obtained via numerical difference or automatic differentiation technology. The model extension method of the invention makes up for the defects of Aspen Plus in the modeling process so that the optimal solution obtained via the optimization algorithm is more accurate and reliable, is very simple, and has easy operation and convenient maintenance.

Data correction method used for varying data of chemical engineering flow system

The invention discloses a data correction method under the condition of variable load of a chemical flow system. The method comprises the following steps: firstly, acquiring measuring data of a measuring instrument within a period of time, and applying steady state detection technology for steady state determination according to key measuring bits among the measuring data; secondly, taking mean values of the measuring data in various steady states, performing steady state operating condition interval division on the mean values of the steady state data according to the load, and dividing the mean values into a plurality of different steady state operating condition intervals; and thirdly, performing data correction and remarkable error detection on multi-variable multi-group measuring data in each steady state operating condition interval, and obtaining remarkable error detection results and data correction results of various steady state operating condition intervals. The method has more ...

Hydroxyhexyl sodium sulfonate synthesizing device

The invention provides a hydroxyhexyl sodium sulfonate synthesizing device, which comprises a reactor (1) and is characterized in that a stirrer (2) is arranged in the reactor (1), the lower part of the reactor (1) is provided with a material outlet (6) which is connected with a material pipe (3), and the material pipe (3) is connected with a material pump (4) and a heat exchanger (5) and then isconnected with a material inlet (7) arranged at the upper part of the reactor (1). In the hydroxyhexyl sodium sulfonate synthesizing device provided by the invention, the material pipe is arranged outside the reactor and is connected with the heat exchanger so as to play a good effect on heat exchange and ensure the normal operation of reaction.

Graphic processor parallel solving method for polymer molecular weight distribution solving

The invention discloses a graphic processor parallel solving method for polymer molecular weight distribution solving. The method comprises the following steps of: establishing a dynamic analog mechanism model of free radical polymerization reaction to solve polymer molecular weight distribution; decomposing the mechanism model into a small-scale free radical polymerization reaction model and a large-scale free radical polymerization reaction model by a decoupling method; solving the small-scale free radical polymerization reaction model by utilizing a step and order changing backward difference method; and solving the large-scale free radical polymerization reaction model by a parallel sequential method to accelerate the solution of molecular weight distribution calculation by using a graphic processor of the NVIDIA corporation as a calculation platform. Compared with the traditional nonparallel polymer molecular weight distribution solving method, the invention can fully utilize thecharacteristic ...

Network system for monitoring fakery commodity

An antiforge monitor network system for commodities is composed of such subsystems as communication network, central database, factory input, distribution company check, market check, consumer check and government monitor. The marker information on commodity is read out by readers, then input to microcomputers and finally transmitted to central batabase over communication network, where it is checked with the correspondent information stored in the database in order to discriminate if it is true or false. Said government monitor subsystem can be used to nomalize the market rule.

Method for expanding compatibility of Aspen Plus to non-linear programming solver based on CAPE-OPEN

The invention discloses a method for expanding the compatibility of Aspen Plus for a nonlinear programming solver based on CAPE-OPEN. The method ensures that the compatibility o f Aspen Plus on the aspect of optimizing the solver is expanded, so that the Aspen Plus supports the optimization solver based on open computer aided process engineering. Aspen Plus interacts with the external nonlinear programming solver through the interface set of an open solver. In order to standardize the interaction between the Aspen Plus and the external solver, and well realize the integration and interoperability among software, a layer of middleware based on OI is realized between AOS and the external solver by adopting the technology of component object model and utilizing standard optimizing interface set issued by CAPE-OPEN laboratory network organization aiming at a mixed integer nonlinear programming. The invention ensures that the Aspen Plus can obtain and use an optimization algorithm with a better ...

Aminohexylsulfonic acid aminolysis device

The invention provides an aminohexylsulfonic acid aminolysis device, which comprises a reaction pot (1) and a material feeding pipe (2), and is characterized in that a temperature measuring device (3)is arranged in the reaction pot (1), the temperature measuring device (3) is connected with a computer (4), an electromagnetic valve (5) is arranged on the material feeding pipe (2), and the computer(4) is connected with the electromagnetic valve (5). In the aminohexylsulfonic acid aminolysis device provided by the invention, the temperature measuring device is arranged in the reaction pot, themeasured temperature information is processed by the computer, and the computer controls the electromagnetic valve according to the temperature condition so as to control the speed of material delivery, accurately control the material delivery amount without manual supervision and ensure the normal operation of aminolysis reaction.