1955results about "Distillation regulation/control" patented technology

The invention discloses a dynamic intelligent control method and system for improving the efficiency of a rectifying tower, particularly relates to the technical field of chemical process control, and is used for solving the technical defect that an operation variable is mismatched with a physical state due to the fact that an existing distributed control system cannot recognize a hidden degradation state of equipment. The method comprises the following steps: acquiring temperature gradient distribution of each tower plate of a rectifying tower, thermal load of a reboiler and tower top condensation load parameters in real time, calculating a mass transfer efficiency offset by combining the temperature gradient distribution to generate a scaling trend index, and synchronously calculating a local entropy yield based on the thermal load and the condensation load to generate a thermodynamic irreversibility index. When the double indexes exceed a preset threshold value, it is judged that a recessive degradation state is entered, then a backflow ratio correction coefficient is reversely derived through a dynamic correlation model, and the correction coefficient is input into a distributed control system to dynamically adjust backflow ratio operation parameters; the product purity is maintained, the tower plate scaling process is obviously delayed, and long-term efficient operation of the rectifying tower is guaranteed.

A method for producing a tin compound represented by formula (A1) with a purity of 95 mol % or higher, involves a step of distilling the tin compound, in which the number of plates of the distillation is 10 or more, and the reflux ratio is 30 or less.RSnX3  (A1)In formula (A1), R is an organic group with 1 to 30 carbon atoms, and may be substituted with halogen, oxygen atoms, or nitrogen atoms. X is selected from OR′ and NR′2. R′ is an organic group with 1 to 10 carbon atoms, and part may be substituted with halogen, oxygen atoms, or nitrogen atoms. When there are multiple R′ groups in the molecule, they may have the same or different structures, and they may be bonded to each other to form a cyclic structure.

The invention discloses preparation equipment and a preparation process for preparing high-purity electronic-grade thionyl fluoride, and the preparation equipment comprises a mixer, the mixer is communicated with a first preheating device, the first preheating device is communicated with a first rectifying tower, the top of the rectifying tower is connected with a condenser, the condenser is communicated with a crude product tank, the crude product tank is communicated with a second preheating device, and the second preheating device is communicated with a second rectifying tower. The second preheating device is communicated with a second rectifying tower, the second rectifying tower is communicated with a third rectifying tower, the third rectifying tower is connected to a storage tank, the storage tank is connected with a vaporization device, the vaporization device is pressurized and then stored in a high-pressure buffer tank, the high-pressure buffer tank is connected with at least three adsorption towers, and the adsorption tower at the rearmost end is connected with a high-pressure product tank. According to the invention, the purity of the finished product is improved, and all raw material components are fully utilized.

The invention discloses an electronic-grade nitric acid preparation device and method capable of controlling the filtering speed based on temperature difference, and relates to the technical field of nitric acid preparation.The electronic-grade nitric acid preparation device comprises a first-stage rectifying tower and a second-stage rectifying tower, and a first-stage evaporator and a second-stage evaporator are arranged on the outer sides of the bottoms of the first-stage rectifying tower and the second-stage rectifying tower respectively; compared with an existing filtering part, the temperature control assembly is arranged, the temperature control assembly has double functions, on one hand, liquefied nitric acid entering the filter is preheated, and on the other hand, the filtering speed of the filtering assembly on nitric acid is changed according to needs; in addition, a filling disc is accurately rotated through a reversing motor, so that a target material storage cavity is isolated from the rectifying tower main body, and the risk of negative pressure damage or harmful gas leakage in the tower in the traditional dismounting process is avoided.

The invention relates to the technical field of chemical separation, in particular to a cyclohexanone rectification and purification method based on high-tower segmented packing, which comprises the following steps: step 1, filtering a cyclohexanone raw material containing impurities to remove solid particles, and dynamically adjusting the filtering precision according to the viscosity of the raw material; 2, arranging a bottom section, a middle section and a top section in the vertical high tower; the temperature gradient of each section is regulated and controlled through an independent temperature control unit, so that the temperature gradient of the middle section is matched with the relative volatility of the cyclohexanone-light component; 3, dynamically adjusting the reflux ratio based on the real-time detection result of the purity of the tower top distillate, and controlling an intermittent discharge valve according to the density change of the tower bottom heavy component enrichment liquid so as to continuously remove the heavy components; and 4, recycling the waste heat of the steam at the top of the tower for preheating the raw materials, and inhibiting the tower pressure fluctuation through a buffer tank. Through the innovative design of sectional packing of the high tower, the separation efficiency is improved, the energy consumption is reduced, and meanwhile, the equipment reliability is improved.

The invention belongs to the technical field of intelligent early warning, and particularly relates to an intelligent early warning method for a DMF waste liquid purification and recovery control platform, and the method comprises the steps: carrying out the principal component analysis of long-period historical data, and constructing a principal component transformation matrix of a static reference model; for a moment to be diagnosed, calculating a reconstruction value by using the static reference model to obtain a residual vector, carrying out eigenvalue decomposition on a covariance matrix of a residual matrix of a sliding time window, calculating a drift coherence index according to the distribution of drift eigenvalues, modulating a drift principal component vector of the sliding time window by combining the residual vector, and carrying out diagnosis on the moment to be diagnosed; and obtaining a drift compensation vector, superposing the drift compensation vector with a reconstruction value of a real-time data vector at a to-be-diagnosed moment to obtain an adaptive reconstruction value at the to-be-diagnosed moment, calculating a reconstruction error, comparing the reconstruction error with a fault alarm threshold, judging whether a fault exists at the to-be-diagnosed moment, and performing early warning. According to the invention, the early warning accuracy and robustness are improved.

The invention relates to the technical field of chemical engineering, in particular to a simple and safe ammonia residual gas recovery system which comprises a liquid ammonia storage tank (1), an accident ammonia absorption tower (2), a circulating pump set, a gas phase pipeline and a liquid phase pipeline, the circulating pump set comprises a circulating water pump, a compression pump and a waste heat recovery pump, the waste heat recovery pump is connected with a steam valve, and the liquid ammonia storage tank (1) is connected with a gasifier (11). The vaporizer (11) is connected with the buffer tank (12), the buffer tank (12) and the accident ammonia absorption tower (2) circulate pure ammonia gas through a gas phase pipeline, the accident ammonia absorption tower (2) and the liquid ammonia storage tank (1) circulate pure liquid ammonia through a liquid phase pipeline, the absorption tank (21) adsorbs exhaust gas detected by the accident ammonia absorption tower (2), and recovered nitrogen is used for purging the liquid ammonia storage tank (1), so that escape-free environment-friendly treatment and recycling of ammonia are realized.

The invention relates to the field of carbon dioxide preparation, in particular to a backflow control method, device and equipment for carbon dioxide purification and a program product. The method comprises the following steps: determining components, inflow, working temperature and working air pressure of raw material gas in the carbon dioxide purification system, and determining constraint conditions of the purification rate after carbon dioxide purification; the working temperature, the working air pressure, the components, the inflow and the different backflow proportions are input into a backflow network model which is trained in advance, and purification rates and system energy consumption corresponding to the different backflow proportions are output through the backflow network model; according to the constraint condition of the purification rate, performing iterative optimization on the reflux proportion by taking the lowest system energy consumption as an optimization target, and determining the reflux proportion when the system energy consumption is the lowest under the condition that the constraint condition is met; carbon dioxide purification is carried out by controlling the opening degree of the backflow channel in the carbon dioxide purification system according to the backflow proportion, so that the system can meet the purification constraint, and the energy consumption of the system is effectively reduced.

The invention discloses a multi-stage distillation control method and system for fatty acid ester refining, and the method comprises the steps: collecting the temperature, pressure, component concentration and flow data of each tower of a multi-stage distillation system in real time, and obtaining a real-time operation state vector representing the overall operation situation of the current system; according to the real-time operation state vector, obtaining a global optimization instruction set containing optimal set temperature, set pressure, reflux ratio and inter-tower energy flow instructions of each tower; according to the inter-tower energy flow instruction, obtaining a real-time energy flow map for realizing cross-tower energy cascade matching; according to the global optimization instruction set and the real-time energy flow atlas, obtaining a stable rectification operation state matched with the optimization target and the energy flow atlas; and obtaining a system self-healing state for maintaining continuous and stable output of the high-purity fatty acid ester according to abnormal disturbance characteristics continuously monitored in a stable rectification operation state. By utilizing the embodiment of the invention, global cooperative control of multi-stage distillation can be realized, and the separation purity and the energy efficiency ratio are improved.

The invention discloses a storage medium, and an optimization method, device and equipment for a multi-effect rectification process flow. The method comprises the following steps: constructing a mechanism model comprising each rectification tower in a multi-effect rectification system; respectively constructing a first correlation function and a second correlation function; generating a data set of a preset group number of process parameters; the data set serves as input, and the reboiler thermal load of the highest-pressure rectifying tower is obtained through mechanism model calculation and serves as theoretical output; taking the data set of the process parameters and theoretical output as modeling data, and generating a prediction model capable of predicting the thermal load of the reboiler of the highest-pressure rectifying tower according to the process parameters through deep learning; and obtaining predicted parameter values of the controllable process parameters when the maximum pressure rectifying tower reboiler has the minimum energy consumption through the prediction model. According to the method, the number of process parameters participating in calculation and the solving difficulty in subsequent optimization calculation can be greatly reduced, and the calculation efficiency of obtaining the optimal solution can be effectively improved.

The invention discloses a high-viscosity polymerization solution devolatilization system. The high-viscosity polymerization solution devolatilization system comprises a first-stage flash heater, a first-stage flash tank distributor, a first-stage flash tank, a second-stage flash heater, a second-stage flash tank distributor, a second-stage flash tank, a third-stage flash tank distributor and a third-stage flash tank. The invention also provides a high-viscosity polymerization solution devolatilization process which is operated in the system. According to the high-viscosity polymerization solution devolatilization system and process provided by the invention, through static flash devolatilization, dynamic flash does not need to be introduced, and the energy consumption is relatively low; in the high-viscosity polymerization solution devolatilization process provided by the invention, the glue solution content in the polymer solution at the liquid phase outlet of the first-stage flash tank is 50-75% wt, the glue solution content in the polymer solution at the liquid phase outlet of the second-stage flash tank is 85-93% wt, the glue solution content in the polymer solution at the liquid phase outlet of the third-stage flash tank can reach 99.9% wt or more, and the devolatilization efficiency is high.

The invention discloses gamma-butyrolactone single-tower rectification equipment and a treatment process thereof, and relates to the technical field of gamma-butyrolactone preparation.The gamma-butyrolactone single-tower rectification equipment comprises a feeding pump, a rectification tower, a first cooler, a second cooler, a hazardous waste storage tank, a finished product storage tank and a vacuum pump, the rectification tower comprises a tower shell, and tower plates are evenly arranged in the tower shell in the height direction; an overflow weir is arranged on one side of the tower plate, and a downflow plate is connected below the overflow weir; bubble cap assemblies are uniformly distributed above the tower plate, and each bubble cap assembly comprises a breather pipe, a rotary steam distribution component and a cyclone structure; the bottom end of the ventilation pipe is fixed at the top of the tower plate and forms a ventilation channel penetrating through the tower plate; the top end of the ventilation pipe is higher than the highest point of the overflow weir. Through structural innovation and process optimization, high purity of the product is guaranteed, energy consumption and material consumption are reduced, high efficiency, intelligence and environmental friendliness are achieved, and an advanced solution is provided for rectification production of gamma-butyrolactone.

The invention discloses methylamine rectification equipment, a separation and purification assembly and a purification process, and relates to the technical field of methylamine processing.The methylamine rectification equipment comprises a tower body, a skirt is arranged at the bottom of the tower body, a manhole is formed in the side face of the skirt, a drain pipe is arranged at the bottom of the tower body, a ventilation hole is formed in the side face of the skirt, and a steam ingress pipe is arranged at the bottom of the side face of the tower body; a liquid inlet pipe is arranged on the side face of the tower body, a backflow pipe and a tower body top hanging column are arranged on the two sides of the top of the side face of the tower body respectively, a steam guide-out pipe is arranged at the top end of the tower body, a gas-liquid separator is arranged on the top side of the interior of the tower body, and tower plate assemblies are vertically arranged in the tower body in a staggered mode. Moreover, when the tower plate leaks liquid, monitoring is carried out in time, process parameters are adjusted in time, in addition, the flow speed of liquid on the tower plate can be adjusted conveniently according to production requirements, and blockage clearing can be intervened in time conveniently when the tower plate is blocked.

The invention provides an electronic-grade hydrofluoric acid rectification heat exchange device, and relates to the field of heat exchange devices.The electronic-grade hydrofluoric acid rectification heat exchange device comprises a cold recovery box, the surface of the cold recovery box is provided with a hot backflow pipe and a hot circulation box, a plurality of mass transfer boxes are arranged above the cold recovery box, a plurality of mass transfer bottles are fixedly connected to the interiors of the mass transfer boxes, and the tops of the mass transfer boxes are fixedly connected with a top plate; a plurality of adjusting holes are uniformly formed in the surface of the top plate, adjusting boxes are arranged in the mass transfer boxes, high-corrosion-resistance air bags are symmetrically arranged on the surfaces of the adjusting boxes, adjusting blocks are arranged in the adjusting boxes, rotating pipes are arranged in the mass transfer bottles, and stirring paddles are arranged on the surfaces of the rotating pipes. The efficiency and the stability of the hydrofluoric acid rectification heat exchange device are improved, the adaptability of the device to the production scale and different raw materials is improved, and the energy consumption is reduced.

The invention relates to the field of distillation equipment, in particular to a novel distillation tower. The technical problems that in a traditional device, contact between a catalyst and a raw material is not sufficient, the catalytic effect is poor, the distillation efficiency is low, it is inconvenient for workers to intermittently add the raw material into a distillation cylinder, and continuous work is not convenient are solved. A novel distillation tower comprises a supporting frame, a distillation cylinder is fixedly connected to the supporting frame, the distillation cylinder is hollow, a liquid outlet valve is fixedly connected to the bottom of the distillation cylinder, and a heating frame is rotatably connected to the lower portion of the inner wall of the distillation cylinder. The contact frame is driven by the motor to rotate, the contact frame extrudes the limiting plate upwards, the through hole in the limiting plate moves upwards to enter the discharging pipe, raw materials can enter the distillation cylinder, the contact frame continues to rotate to be separated from the limiting plate, the limiting plate limits the raw materials again, intermittent discharging into the distillation cylinder can be facilitated, and continuous work is facilitated.

The invention provides a real-time optimization method for energy consumption in a chemical production process, which comprises the following steps: acquiring real-time purity data of a tower top product, comparing the real-time purity data with a target purity range, judging whether deviation occurs, if deviation occurs, acquiring a heating steam rate, a reflux amount, a feed preheating temperature and a tower plate blockage parameter, and evaluating an operation state; if blockage is detected and the gas-liquid contact efficiency is reduced, it is judged that the separation effect is reduced due to blockage, the blockage position and degree are obtained in real time, and the reflux liquid quantity parameter and the tower top condensation rate are dynamically adjusted to balance the tower top product purity and steam consumption; the efficiency difference between the gas-liquid contact efficiency and the target range is monitored in real time, the matching relation between the tower top product purity and the overall energy consumption is evaluated according to the process parameters and the equipment state, and the operation parameters and the load distribution are adjusted in real time to optimize the energy consumption distribution.

The invention discloses a gas-liquid turbulent mass transfer device and method for low-temperature gas stripping purification of thermosensitive materials, the device comprises a tower body, the top of the tower body is provided with a liquid feed port and a gas discharge port, and the bottom of the tower body is provided with a liquid discharge port and a gas feed port; a turbulent element is arranged in the tower body and comprises a partition plate coaxially arranged in the gravity direction, a small rotational flow cavity, a large rotational flow cavity, a downcomer, a liquid seal circular groove and a plurality of connecting rib plates for fixing the liquid seal circular groove on the downcomer, and the small rotational flow cavity, the large rotational flow cavity and the downcomer are communicated in sequence; and a tangential gas inlet is formed in the side wall of the large rotational flow cavity. According to the invention, gas-liquid turbulent enhanced mass transfer is realized through the turbulent element, volatile components in the thermosensitive material are removed at low consumption on the premise of avoiding deterioration of the thermosensitive material, and meanwhile, the liquid seal circular groove is arranged to realize liquid seal at a lower liquid amount, so that the retention time of the thermosensitive material is shortened, and the energy consumption and the purification and separation cost are greatly reduced.

The invention discloses a phosphorus trifluoride production device and method, and belongs to the technical field of phosphorus trifluoride production, the device comprises a reaction part, a pretreatment part and a post-treatment part, the reaction part comprises a first raw material tank, a second raw material tank, a reaction kettle and a collection cold trap, the pretreatment part comprises a primary separation tower and an absorption tower, and the post-treatment part comprises a secondary separation tower and an absorption tower. The post-treatment part comprises an adsorption tower, a light component removal tower and a heavy component removal tower; the production method comprises the following steps: adding raw materials of phosphorus trichloride and hydrogen fluoride into a reaction kettle to generate phosphorus trifluoride and hydrogen chloride, collecting the phosphorus trifluoride and hydrogen chloride in a collecting cold trap, heating the collecting cold trap to vaporize the phosphorus trifluoride and hydrogen chloride, and sequentially entering a primary separation tower, a light component removal tower and a heavy component removal tower for a series of treatment, and finally, high-purity phosphorus trifluoride gas is extracted from the heavy component removal tower to a filling system. According to the method, high-purity phosphorus trifluoride with the purity larger than or equal to 99.999% can be finally produced, and the problem that in the prior art, the purity of phosphorus trifluoride is not enough is solved.

The utility model discloses an electronic-grade hydrofluoric acid production system, industrial hydrofluoric acid is input into the system to obtain high-purity electronic-grade hydrofluoric acid, and the system comprises a graphite evaporator, a rectifying tower and a condenser, the graphite evaporator is provided with a feeding pipeline and a condensed water outlet, and the feeding pipeline is used for inputting industrial hydrofluoric acid into the graphite evaporator; a steam pipeline is further arranged on the graphite evaporator, the other end of the steam pipeline is connected with the rectifying tower, the steam pipeline is used for conveying gas heated by the graphite evaporator into the rectifying tower, and the rectifying tower is used for rectifying and separating hydrofluoric acid gas produced by the graphite evaporator; industrial hydrofluoric acid is added into the graphite evaporator to be heated to obtain hydrofluoric acid, then the hydrofluoric acid is fed into the rectifying tower with a certain height to be distilled, backflow is conducted in proportion, the product quality meets the requirement, and continuous production can be achieved through combination of the graphite evaporator and the rectifying tower; liquid hydrofluoric acid is used as a raw material, high risk of anhydrous hydrogen fluoride gas is avoided, and safety of the system is improved.

The invention discloses electronic grade ammonia water purification rectification equipment and a rectification method, and relates to the technical field of rectification towers, the electronic grade ammonia water purification rectification equipment comprises an upper main tower, a lower main tower, a plurality of sealing assemblies, a top tower cylinder, a bottom tower cylinder, a wastewater pipe, a steam pipe and an output pipe, the bottom tower cylinder, the lower main tower, the upper main tower and the top tower cylinder are sequentially arranged from bottom to top; the bottom tower drum, the lower main tower, the upper main tower and the top tower drum are connected through sealing assemblies, an upper sealing plate is installed at the top of the top tower drum, a lower sealing plate is installed at the bottom of the bottom tower drum, the waste water pipe is connected to the lower portion of the lower sealing plate, the steam pipe is connected to the bottom tower drum, and the output pipe is connected to the upper portion of the upper sealing plate. A return pipe is communicated between the output pipe and the top tower drum, a plurality of support frames are arranged in the upper main tower and the lower main tower, a filler plate is arranged in each support frame, and the ammonia water is purified step by step and the doped solution is separated step by step by utilizing the characteristics that the boiling point of the ammonia water is low and the boiling point of the doped solution is high.

The utility model provides a rectifying tower with an adjustable feeding position. Relates to the field of rectification equipment, and aims to solve the problem of low test efficiency caused by inconvenience in adjustment during test of a feed port of a rectification tower at present. Two sections of elastic hoses are arranged in an adjusting pipe, and a sliding plate and a screen plate are mounted on the elastic hoses, so that a rectification inlet of the adjusting pipe is formed between the two sections of elastic hoses; and the position and the distance of the rectification inlet can be adjusted, so that the requirement of conveniently adjusting the material feeding position when the parameters of the rectification device are optimized is met, and the testing efficiency is improved.

Embodiments presented provide for a multirotational counter rotating reactor. The reactor is configured to accept a fluid stream and separate the fluid stream into high quality liquid and gaseous phases through spinning of the sets of discs as well as through performing a heat transfer to the fluid stream.

The invention discloses a vacuum distillation furnace filtering system which comprises a bottom plate, a central controller installed on the bottom plate, a vacuum equipment module installed on a supporting table, a vacuum distillation furnace fixedly connected to a supporting reinforcing frame, a vacuum gauge installed in the vacuum distillation furnace and a first temperature sensor installed in the vacuum distillation furnace. A pressure sensor is installed in the vacuum distillation furnace, a multi-layer filtering module is installed between the bottom plate and the discharging pipe, and a waste heat recovery module is installed between the bottom plate and the vacuum distillation furnace. Particles are dynamically separated through the multiple layers of filtering modules by means of centrifugal force, the blocking problem of traditional static filtering is avoided, meanwhile, the two filtering modules are divided through the discharging pipe to operate separately, filter element replacement without shutdown is achieved, and the shutdown maintenance time is shortened.

The utility model relates to a reaction device for synthesizing C8-13 alcohol benzene polyacid ester by a continuous method in the field of chemical equipment. A tower body of the reaction device consists of a catalytic reaction section, a rectification dealcoholization section and a reflux section from bottom to top, a feed port and a discharge port are formed in the side wall of the catalytic reaction section, a weight removal port is formed in the bottom of the catalytic reaction section, a gas guide rising pipe is arranged in the catalytic reaction section, a gas inlet is formed below the gas guide rising pipe, and a catalyst loading tank is reserved between the side wall of the catalytic reaction section and the guide rising pipe; a plurality of tower plates are arranged in the rectification dealcoholization section; the tower plates obliquely extend inwards and downwards from the side wall of the rectification dealcoholization section; upper and lower adjacent layers of tower plates are arranged in a staggered manner; a light component removal opening is formed in the side surface of the rectification and dealcoholization section; a liquid distributor is arranged at the top in the reflux section, and a gas phase outlet is formed in the side surface of the upper part of the reflux section and is connected to the liquid distributor through a condensation reflux device and a reflux control valve. The device can be used for continuously synthesizing C8-13 alcohol benzene polyacid ester, and is short in process flow and good in product quality.

The invention relates to the technical field of gas separation, in particular to an amine recovery monitoring method and system for polyurethane synthesis tail gas. The method comprises the following steps: preliminarily separating to obtain a triethylamine solution; collecting parameter values of different parameters for distillation of the triethylamine solution; acquiring a parameter sequence in a preset time period; decomposing the parameter sequence to obtain a periodic sequence and a trend sequence; obtaining periodic saliency values of different parameters based on the periodic sequence, and obtaining a fluctuation consistency coefficient based on the trend sequence; a distillation interference coefficient is obtained after weighting; pure triethylamine is obtained based on the distillation interference coefficient control system; collecting attribute values of different attributes, constructing a change characteristic value sequence through differences between data values and predicted values of the attributes in the sliding window, and obtaining a dehydration steady-state index based on sequence similarity and vapor pressure differences; and recycling and monitoring of triethylamine are realized based on the dehydration steady-state index. According to the method, the dehydration efficiency of the triethylamine is improved, and the purity of the recovered triethylamine is further improved.

The invention discloses an intelligent automatic control rotary evaporator, and belongs to the technical field of chemical instruments. An intelligent automatic control rotary evaporator comprises a bottom box and a heating pot, a rotary machine head is installed on the bottom box, a condenser and an evaporation bottle are installed on the rotary machine head, and the lower end of the condenser is connected with a collection bottle; precise adjustment of the height and the inclination angle of the evaporation bottle is achieved through the electric telescopic rod and the rotating shaft, and the assembly and disassembly process of components is simplified through the bottle retreating locking nut, the condensation installation nut and other structures; heating temperature control automation is realized by combining a temperature sensor and a control box, and constant-speed rotation of the evaporating flask is ensured through motor driving; the stability of the condenser is enhanced by means of a first adjusting rod and a fixing sleeve, and material adding in a vacuum environment is achieved by integrating a deflation charging valve and a vacuum extraction opening; the control box integrates a multi-module control function, supports the replacement of parts of different specifications, remarkably improves the adjustment convenience, operation efficiency, temperature control precision and experiment adaptability of equipment, and is high in automation degree.

The invention relates to the technical field of glycerin distillation, in particular to a glycerin distillation device with a heat energy recycling function. The device comprises a distillation tower, a condenser, a reflux tank and a compression mechanism connected with the reflux tank, wherein one side of the distillation tower is communicated with a feed pipe, and the top of the distillation tower is communicated with a steam discharge pipe connected with the condenser; one side of the distillation tower is communicated with a reboiler; the condenser has a normal refrigeration temperature and an energy-saving refrigeration temperature, and in the glycerin distillation device with the heat energy recycling function, a part of liquid phase is guided into the distillation tower and then is matched with a gas phase which is not condensed by the condensation tank, so that the gas phase which is not condensed by the condensation tank is pressurized and then is condensed by the condensation tank; according to the utility model, the gas phase inside the distillation tower is guided to the liquid phase, and the liquid phase is scattered by utilizing the blade fan, so that the gas phase is in uniform contact with the liquid phase, and therefore, the gas phase is guided into the distillation tower, the efficient separation of glycerol is also realized, and the product quality is improved.

The invention discloses an NMP waste liquid recovery rectification intelligent control system, and relates to the technical field of NMP waste liquid recovery processing, the NMP waste liquid recovery rectification intelligent control system comprises a data acquisition module, a concentration prediction module, a benefit evaluation module, an optimization adjustment module, an alarm module and a data storage module, the concentration prediction module comprises a real-time analysis unit and a historical analysis unit, the benefit evaluation module predicts expected effects of different parameter combinations according to NMP concentration in future time and real-time waste liquid recovery data to obtain a comprehensive benefit score, and system parameters are automatically adjusted through the optimization adjustment module to optimize the system. Parameters are corrected to improve prediction accuracy, lag and purity fluctuation are reduced, parameter benefits are quantified through a benefit evaluation module, an optimal parameter is automatically selected through an optimization adjustment module, intelligence and recovery efficiency are improved, and the effects of dynamically adjusting the weight through setting an interference compensation item, enhancing the anti-interference capability and guaranteeing stable operation of the system are achieved.

The invention relates to an acetylene purification system and method, in particular to a method for removing impurities in acetylene to an electronic-grade acetylene level through a membrane separation technology coupled rectification process, and belongs to the field of gas separation. Aiming at the characteristics of an industrial grade acetylene material, the invention provides a technology for preparing electronic grade acetylene based on membrane separation coupling rectification, the membrane separation technology and the rectification technology are organically coupled, and a safe solvent is introduced into a rectification tower, so that the thermal stability of liquid acetylene is effectively improved, and the explosion risk is remarkably reduced. According to the technology, efficient preparation of the electronic-grade acetylene (the purity is greater than or equal to 99.9999%) is realized, and the method has a good industrial application prospect and popularization value.

The invention relates to the technical field of data processing, in particular to an intelligent optimization control method and system for a rectifying tower. The method comprises the following steps: collecting steam quantity, cold quantity and tower plate temperature data at each moment, and clustering historical temperature data of the tower plate temperature data at the current moment to obtain a plurality of clusters; acquiring temperature stability in each cluster, and acquiring a heat balance state index at the current moment according to the temperature stability; the method comprises the steps of obtaining temperature change disturbance controllability in a control period at the current moment, obtaining the number of adjustment iterations of the control period at the current moment according to the change disturbance controllability, and obtaining a predicted temperature value according to the number of adjustment iterations of the control period at the current moment. According to the size relation between the predicted temperature value and the heat balance state index at the current moment, the steam amount and the cold amount at the current moment are adjusted, and the rectification process is dynamically and accurately controlled by predicting the future temperature value.