1032results about "Distillation regulation/control" patented technology

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 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 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 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 belongs to the technical field of chemical engineering, and relates to a method and a device for utilizing latent heat of a tower top gas phase in cyclohexanol preparation. Comprising a first separation tower, a second separation tower and the like, a tower top gas phase outlet of the second separation tower is connected with a hot side inlet of a second tower condenser, and a cold side outlet of the second tower condenser is connected with the first separation tower; a tower top gas phase outlet of the cyclohexene recovery tower is connected with the first separation tower; a tower top gas phase outlet of the cyclohexanol refining tower is connected with a hot side inlet of a refining tower condenser, and a cold side outlet of the refining tower condenser is connected with the second separation tower through a pipeline; an outlet of the hydration reaction system is connected with the first separation tower, and a tower kettle liquid phase outlet of the first separation tower is connected with an inlet of the second separation tower through a pipeline; a side line outlet of the first separation tower is connected with the hydration reaction system. The tower top gas phase latent heat of the second separation tower, the cyclohexene recovery tower and the cyclohexanol refining tower is recycled, so that the energy consumption in the cyclohexanol production process is reduced.

The present application relates to the field of semiconductor manufacturing, and specifically to a component separation device, and a liquid recovery apparatus and method. The component separation device comprises a heater, a distillation chamber, a condenser, a light component collection tank and a heavy component collection tank. The heater is configured to heat a waste liquid, such that the waste liquid is heated to evaporate, light components therein volatilize onto a surface of the condenser and flow into the light component collection tank after condensation, heavy components therein flow into the heavy component collection tank from a surface of the heater, and a distance between the condenser and the heater is greater than an average molecular motion path L1 of the heavy components and less than an average molecular motion path L2 of the light components. The waste liquid is heated to evaporate, such that the heavy components and the light components in the waste liquid are effectively separated, thereby effectively recycling the waste liquid.

The invention belongs to but not limited to the technical field of rectification, and discloses a crude methanol five-tower multi-effect rectification energy-saving process and device. A crude methanol raw material is preheated and then enters a pre-tower for rectification, and steam at the top of the pre-tower is used as a heat source of a negative pressure tower reboiler; the negative-pressure tower, the pressurizing tower, the atmospheric tower and the recovery tower sequentially perform rectification separation, and steam at the top of each tower is used as a heat source or reflux of a downstream reboiler according to process requirements; a heat exchange medium II generated in the methanol conversion section directly supplies heat to the pre-tower reboiler; a heat exchange medium I generated in the methanol conversion section supplies heat to the atmospheric tower reboiler after meeting the waste heat requirement of the pre-tower reboiler; when the methanol conversion section can provide residual heat, the residual heat is preferentially supplied to the negative pressure tower and / or the recovery tower reboiler so as to reduce the external steam consumption. By reasonably utilizing the heat of the conversion section, the waste heat of the equipment and the heat of the tower are subjected to gradient utilization, a large amount of heat is recovered, and the steam energy consumption of the system is greatly reduced.

The present invention belongs to the technical field of methyl methacrylate. Disclosed is a rectification device for recovering methyl methacrylate, comprising a rectification column body, wherein the rectification column body is internally provided with a heat protection part, and the heat protection part comprises a temperature sensor which is fixedly connected to the inner wall of the top end of the rectification column body and configured to monitor the temperature in the rectification column body in real time. An electric cylinder is started and retracts to drive a toothed plate to translate, and during translation, the toothed plate synchronously drives the extension of a corrugated pipe mounted thereto, such that some high-temperature hot gas at the top of the rectification column body is sucked in by means of one gas pipe, and is subsequently led out of the rectification column body via the other gas pipe, thereby preventing a sustained temperature rise. When the electric cylinder extends again, a piston plate rod can push and compress cooling gas that is drawn in advance, and the cooling gas can be ejected via L-shaped pipes to drive wind wheel shaft rods to rotate, increasing the air circulation inside the rectification column body, and avoiding the polymerization of methyl methacrylate and effects on the rectification quality.

The invention belongs to the technical field of heat pump rectification, and particularly relates to a double-effect heat pump rectification system which comprises a first-effect rectification tower feeding pump connected with a preheater, the preheater is connected with a first-effect rectification tower, the first-effect rectification tower is connected with a gas-liquid separator through a screw compressor, and the gas-liquid separator is connected with a tail gas condenser through a second-effect falling film reboiler. The second-effect falling film reboiler is connected with a first-effect reflux discharge pump through a first-effect reflux tank, and the first-effect reflux discharge pump is connected with the preheater; the first-effect rectifying tower is respectively connected with a first-effect falling film reboiler and a first-effect falling film circulating pump; the first-effect rectifying tower is connected with a second-effect rectifying tower through a first-effect tower kettle discharging pump; the first-effect falling film reboiler is connected with a second-effect reflux discharge pump through a second-effect reflux tank; the second-effect falling film reboiler is connected with a second-effect falling film circulating pump and a second-effect rectifying tower, the second-effect falling film reboiler is connected with a second-effect rectifying tower kettle discharging pump through the second-effect rectifying tower, and the second-effect rectifying tower is connected with the first-effect falling film reboiler. According to the invention, double-effect rectification and heat pump rectification are successfully combined, and the cost is low.

The invention relates to the field of molecular distillation, in particular to distillation equipment for preparing high-quality silicone oil, which comprises a frame body, a distillation cylinder arranged in the middle of the frame body, a top cover arranged at the top of the distillation cylinder, a plurality of feed ports formed in the bottom of the top cover, a heating surface arranged outside the distillation cylinder, a condenser arranged inside the distillation cylinder, and a vacuum interface formed in the right lower part of the distillation cylinder, a distillate outlet is formed in the lower right portion of the distillation cylinder, a feeding port is formed in the right portion of the top cover, a film scraping frame is rotationally connected into the distillation cylinder and slidably connected with film scraping plates, the upper portion of the film scraping frame penetrates out of the top cover, the film scraping plates are symmetrically arranged on the film scraping frame, and gaps exist between the film scraping plates and the inner wall of the distillation cylinder. Through cooperation of the film scraping frame, the film scraping plate, the first servo motor, the connecting rod, the adjusting frame and other components, a liquid film formed on the inner wall of the distillation cylinder can be more uniform, and meanwhile, the thickness of the formed liquid film can be adjusted according to materials with different viscosities, so that the downward flowing speed of the liquid film tends to be consistent, and the optimal distillation effect is achieved.

The invention relates to the technical field of liquid chromatography fractionation, in particular to a full-automatic liquid chromatography fractionation device, which comprises a fractionation support, a chromatography column bracket and a fractionation chromatography column, and is also provided with an annular ultrasonic array module formed by combining a semi-ring diagnosis probe I and a semi-ring diagnosis probe II, an adjustable sieve plate, a multi-zone differential compensation assembly and a control module, a liquid inlet pipe, a liquid outlet and a detection sensor are additionally arranged; the annular ultrasonic array module detects the compactness of packing in the column and the axial and radial uniformity of pore distribution, the control module controls the multi-area differential compensation assembly to apply differential compensation pressure to different axial sections of a column bed after receiving data, and the detection sensor monitors fluid parameters; the device realizes accurate monitoring and targeted regulation and control of the column bed state, ensures uniform filler compactness, avoids flow state abnormity and bubble interference, remarkably improves fractionation separation efficiency and product purity, is convenient to operate and stable in operation, and is suitable for high-precision separation scenes.

The invention provides a coarse methanol five-tower thermal coupling refining process and a refining device.The device comprises a pre-rectifying tower, a normal-pressure rectifying tower, a medium-pressure rectifying tower, a first pressurized rectifying tower and a second pressurized rectifying tower which are sequentially connected, the top of the pre-rectifying tower is connected with a first normal-pressure tower reboiler, and the top of the medium-pressure rectifying tower is connected with a pre-tower reboiler; the top of the pressurized rectifying tower I is connected with a medium-pressure tower reboiler and a pressurized tower II reboiler; the top of the pressurized rectifying tower II is connected with an atmospheric tower reboiler II through a top extraction pipeline of the pressurized tower II; tower top steam of the first pressurized rectifying tower provides heat for the medium-pressure rectifying tower and the second pressurized rectifying tower, tower top steam of the medium-pressure rectifying tower provides heat for the pre-rectifying tower, tower top steam of the pre-rectifying tower and the second pressurized rectifying tower provides heat for the normal-pressure rectifying tower, and heat of the tower tops of all the rectifying towers is fully utilized; through the application, the unit consumption of the methanol rectification process can be reduced from 1.2 t steam / t refined alcohol to 0.50-0.60 t steam / t refined alcohol, so that the energy consumption is greatly reduced.

A hydrocarbon cleaning agent recovery and industrial wastewater reduction device belongs to the technical field of evaporation and concentration and comprises a distillation kettle, an evaporator, a first partition plate heat exchanger, a second partition plate heat exchanger, a cleaning agent liquid storage tank and a distilled water liquid storage tank. The distillation still is connected with the first partition plate heat exchanger and the second partition plate heat exchanger through the evaporator, the first partition plate heat exchanger is connected with the cleaning agent storage tank, the second partition plate heat exchanger is connected with the distilled water storage tank, the first partition plate heat exchanger is connected with the distillation still, and the second partition plate heat exchanger is connected with the evaporator. The equipment can simultaneously treat waste cleaning agents and waste water, does not need a cooling-water machine of traditional recovery equipment and a core component compressor of an evaporator, greatly saves equipment cost, and greatly reduces waste liquid treatment cost.

The invention discloses a purification device and method for producing PPT-grade hydrochloric acid, and relates to the technical field of rectification purification, the purification device comprises a rectifying tower, a condenser, a circulation tank, an intermediate tank and a heat pump, the feeding end of the rectifying tower is connected with an external evaporator, the discharging end of the rectifying tower is connected with the circulation tank through the condenser, and the circulating tank is connected with the intermediate tank through the heat pump. Compared with an existing hydrochloric acid purifying device, the hydrochloric acid purifying device is provided with the temperature adjusting assembly, through cooperation of the temperature adjusting assembly and the heat pump, heat of hydrochloric acid steam in the condenser can be transferred into the rectifying tower so as to supplement heat lost in the steam rising process in the rectifying tower, and the temperature gradient decreasing phenomenon in the tower is effectively prevented; the whole temperature in the tower is kept stable, the problem that the adsorption efficiency is reduced due to temperature fluctuation is avoided, and a certain filler cavity can be separated from the internal environment of the rectifying tower through the sealing adjusting mechanism according to needs, so that workers can replace waste fillers without shutdown.

The invention relates to the technical field of gas purification, in particular to a carbon tetrafluoride purification system and method, and the purification system comprises a precooling unit, a low-boiling tower and a high-boiling tower; packing layers in array distribution are arranged in the low-boiling tower and the high-boiling tower, a distribution disc is arranged between the packing layers, and telescopic mass transfer parts in array distribution are arranged on the distribution disc; a low-boiling condenser and a high-boiling condenser are arranged at the tops of the low-boiling tower and the high-boiling tower respectively, and refrigerants of the low-boiling tower and the high-boiling tower are introduced into the telescopic mass transfer part through an input pipe after condensation operation is completed and then are discharged through an output pipe; the flow meter is used for detecting the gas discharge amount and the liquid backflow amount of the rectifying tower, the backflow ratio change of the rectifying tower is calculated according to the gas discharge amount and the liquid backflow amount of the rectifying tower, and then the amount of refrigerants introduced into the telescopic mass transfer part can be adjusted and controlled by adjusting the operation power of the booster fan and the opening size of the adjusting valve; therefore, the top height of the telescopic mass transfer part is adjusted.

The invention discloses an ultra-clean high-purity electronic grade hydrochloric acid purification reactor for semiconductors, and relates to the technical field of hydrochloric acid purification, the ultra-clean high-purity electronic grade hydrochloric acid purification reactor comprises a rectification device, a cooling device, a filtering device and a reflux pump, the rectification device is communicated with the cooling device through a pipeline, an inlet of the reflux pump is communicated with the cooling device, and an outlet of the reflux pump is communicated with the rectification device; the cooling device is communicated with the filtering device through a pipeline; the rectification device comprises a rectification kettle and stroke adjusting assemblies, a purification cavity is formed in the rectification kettle, the stroke adjusting assemblies are arranged in the purification cavity, each stroke adjusting assembly comprises a bearing platform and a sliding platform, the opposite ends of the bearing platform and the sliding platform are each provided with filler, the bearing platform is provided with a plurality of adjusting rods, the lower side of the sliding platform is provided with a sleeve shell, and the filler is provided with a plurality of replacement runners. The number of edges of the cross section of the replacement runner is not less than pentagons.

This invention discloses a data-driven real-time dual-temperature optimization control method for distillation columns, belonging to the field of chemical process control and energy conservation. First, a global optimization of the steady-state model of the two-column series system is performed based on a genetic algorithm, and a dual-temperature dynamic control architecture with cross-coordination of the reboiler and reflux ratio is constructed by combining sensitivity analysis. Second, full operating space data is extracted through Latin hypercube sampling, and a high-precision artificial neural network (ANN) surrogate model is trained to replace the mechanistic equations. Finally, when facing operating disturbances, the GA-ANN is used for real-time rapid optimization to find the optimal temperature setpoint that minimizes total energy consumption, and the result is sent to the closed-loop execution of the dual-temperature PID architecture. This invention completely overcomes computational latency, limits product purity fluctuations to within ±0.002 when facing severe disturbances, effectively reduces the total system energy consumption by 1.82%, and achieves efficient, stable, and low-carbon operation of the distillation process.

The utility model relates to distillation condensing device technical field discloses a kind of novel high-efficiency crude distillation condensing device, including distillation kettle, the distillation kettle is hollow cavity, bottom is provided with heating mechanism, top is communicated steam outlet, spiral condenser tube, the spiral condenser tube is connected with steam outlet, collector, the collector is communicated with spiral condenser tube outlet, for receiving condensate, temperature sensor, the temperature sensor is installed at steam outlet, vacuum pump, the vacuum pump is communicated with the top of distillation kettle by connecting pipe, cooling water circulation system, the cooling water circulation system includes cooling water tank and circulating pump. In the utility model, through the heat exchange structure of spiral condenser tube and double-layer spiral cooling jacket, cooperate the negative pressure distillation design of vacuum pump, effectively reduce liquid boiling point and increase condensing area, significantly improve distillation efficiency and energy utilization rate, while distillation kettle inner wall hydrophobic coating reduces liquid adhesion, further optimizes distillation process.

The invention relates to the field of impurity separation, and discloses a method for separating impurities in a liquid phase and application, the method comprises the following steps: (1) contacting a liquid-phase raw material with an adsorbent for adsorption to obtain a liquid-phase material flow; the liquid-phase raw material comprises an organic liquid hydrogen storage substance and impurities; the adsorbent preferentially adsorbs impurities in the liquid-phase raw material; (2) carrying out back-flushing desorption on the adsorbent by using part of the liquid-phase material flow to obtain a desorption solution; based on the total mass of the desorption solution, the impurity content in the desorption solution is 2-5%; (3) feeding the desorption liquid into a rectifying tower, carrying out rectification separation, and outputting the obtained tower bottom distillate and the residual part of liquid phase material flow as products; and (4) regenerating the adsorbent after backwashing desorption. The method has the characteristics of high purity of the organic liquid hydrogen storage substance, low cost and no introduction of new impurities.

The invention relates to an ethanol upgrading device and method, the device is used for upgrading ethanol containing a small amount of ethyl acetate, the device comprises a low-pressure rectification unit, a pumping unit and a high-pressure rectification unit which are connected in sequence, a variable-pressure rectification principle is adopted, azeotrope composition is changed only through a variable-pressure mode, reasonable process parameters are matched, and the quality of ethanol is improved. The purified ethanol is extracted from the low-pressure rectification unit, and the ethanol with higher ethyl acetate content is extracted from the high-pressure rectification unit, so that a large amount of ethanol is prevented from being evaporated to the high-pressure rectification unit, the energy consumption is obviously reduced, the production cost is reduced, and the economic benefit is improved.

This application discloses an acetaldehyde recovery device and method in the production of 1,3-butanediol, belonging to the field of fine chemicals. The device includes: a feed pump, a preheater, a distillation column, a falling film reboiler, a bottom circulating pump, a bottom cooler, a top primary condenser, a reflux ratio distributor, a top secondary condenser, a top product tank, a top transfer tank, a bottom product tank, a bottom transfer tank, a vacuum condenser, a vacuum pump inlet separator, a high vacuum unit, and a vacuum pump outlet separator. The horizontal condenser is directly installed at the top of the distillation column, giving it advantages such as simple structure, convenient operation, low pipeline loss, and high vacuum. A method for acetaldehyde recovery in the production of 1,3-butanediol using this device is also disclosed. Compared to existing technologies, this invention uses falling film evaporation combined with vacuum deep cooling, which avoids the thermal decomposition of 3-hydroxybutyraldehyde and achieves low-temperature, high-efficiency acetaldehyde recovery. It is suitable for continuous production.

The invention discloses a system and a method for preparing adiponitrile by electrolyzing acrylonitrile, and relates to the technical field of chemical product preparation, reaction and separation are efficiently coupled through process innovation, so that an acrylonitrile recovery unit is omitted, the safety is improved, and a modularized external reaction area capable of being flexibly expanded is introduced into the design of a reactor. The design aims to fundamentally break through the physical limitation of traditional equipment on the electrode area, and a brand new technical path is provided for realizing high-efficiency and low-energy-consumption large-scale industrial production. Nearly complete conversion of acrylonitrile is realized through the rectifying tower, and a tower kettle product does not contain unreacted acrylonitrile, so that a complicated acrylonitrile recovery tower and a circulating system do not need to be arranged in a subsequent separation system, the process is remarkably shortened, and equipment investment and operation energy consumption are reduced.

A distillation method includes supplying a batch type distillation column with a liquid that is a process fluid; increasing pressure and temperature of a fluid, with a compressor and supplying the fluid to a reboiler; exchanging heat in the reboiler between the liquid, which has been supplied to the distillation column, and the fluid, which has been increased in pressure and temperature, to heat the liquid and acquire overhead vapor and to condense the fluid; delivering the overhead vapor to a condenser and condensing the overhead vapor into a condensate through heat exchange, removing the condensate; removing residual liquid from the distillation column; and regulating pressure of the distillation column to distill the liquid with heat generated by a heat pump operated over a narrower temperature rising range in the pressure-temperature increasing step.

The utility model discloses an efficient pesticide intermediate distillation device and relates to the technical field of distillation devices. The device comprises a reaction kettle, the top of the reaction kettle is communicated and fixedly connected with a feeding pipe, the top of the feeding pipe is hinged with a cover shell, and the device further comprises a mounting mechanism, so that stirring blades can stir materials and move up and down in a reciprocating manner at the same time, and the materials can be uniformly mixed and heated; water vapor generated by heating enters the connecting mechanism through the connecting pipe to perform distillation operation, the discharging pipe is opened after distillation operation is completed, and the remaining materials are discharged through the discharging pipe, so that the materials are uniformly mixed and heated in the reaction kettle through the operation, the heating uniformity is improved, and meanwhile, the distillation process is more stable and efficient due to the uniform heating state; the condition that part of materials are burnt or the distillation is incomplete due to uneven heating is avoided, so that the distillation effect and the quality of a final product are improved.

The invention relates to the technical field of chemical engineering, and discloses a method for improving the chromaticity and purity of acetic anhydride based on a reflux ratio, and the method comprises the following steps: optimizing an evaporation tower, an acetic acid rectifying tower and an acetic anhydride rectifying tower, and installing an online detection instrument and an automatic control valve to construct an intelligent rectification control system; evaporating the crude acetic anhydride by using the optimized evaporation tower to obtain crude acetic anhydride steam; feeding the crude acetic anhydride steam into an acetic acid rectifying tower, calculating an initial reflux ratio, inputting the initial reflux ratio into a control system, and starting a reflux system to preliminarily remove acetic acid; monitoring the acetic acid content through an online gas chromatograph, and finely adjusting the reflux ratio until the reflux ratio reaches the standard when the measured acetic acid content is higher than a target value; feeding the crude acetic anhydride reaching the standard into an acetic anhydride rectifying tower, calculating an initial reflux ratio, inputting the initial reflux ratio into a control system, and starting to obtain an intermediate product; monitoring chromaticity and purity through an on-line platinum-cobalt colorimeter and an on-line gas chromatograph, and updating the reflux ratio to be qualified according to a bivariate adjustment formula; and finally, carrying out all-item detection on a finished product, and locking reflux ratio parameters after confirming that the finished product is qualified.

The utility model discloses distillation equipment of a test instrument, and relates to the technical field of distillation. The protective structure comprises a base and a protective cover, the distillation structure comprises a heating vessel and a collecting cylinder which are positioned at the upper end of the base, a distillation pipe positioned at the upper end of the heating vessel, a heat exchange pipe communicated with the distillation pipe and the collecting cylinder, a feeding hole opened and closed by a valve and communicated with the interior of the upper end of the heating vessel, and a liquid discharge pipe opened and closed by a valve and communicated with one end of the collecting cylinder; and; the cleaning structure comprises a steam generator, a liquid feeding pipe communicated with the input end of the steam generator, a steam pipe communicated with the output end of the steam generator, controlled by a valve to open and penetrate through the heating vessel, an air heater communicated with the rear end of the heating vessel and controlled by the valve to open and close, and a cleaning pipe communicated with the heating vessel and controlled by the valve to open and close. According to the utility model, the cleaning structure is arranged, so that the problem that the distillation equipment is difficult to clean due to more pipelines and small pipe diameters of the distillation equipment is solved.

The invention provides a waste heat recovery system for molecular distillation equipment, the waste heat recovery system is communicated with a heat return port of a heat generation source, the waste heat recovery system comprises a heat recovery assembly, a heat exchange tank, a preheating feeding header pipe and a plurality of preheating feeding branch pipes arranged at an outlet of the preheating feeding header pipe; a heat conduction part is arranged in the heat exchange tank, the heat conduction part comprises a heat preservation cavity, a heat transfer medium is arranged in the heat preservation cavity, the heat conduction part is rotationally arranged in the heat exchange tank, and a reciprocating material conveying structure is arranged in the heat conduction part. And meanwhile, through the rotating arrangement effect of the heat conduction piece, the rolling movement operation of the heat transfer medium in the heat conduction piece can be achieved, effective heat absorption operation can be conveniently conducted on all the parts of the heat transfer medium, and the performance that the heat transfer medium absorbs heat more sufficiently and efficiently is improved.

The application discloses a kind of electronic grade di-tert-butyl amino-silane manufacturing method, which is sequentially provided with raw material reaction system, centrifugal double-layer membrane separation device, triple nitrogen gas protection rectifying kettle assembly and three-waste recovery treatment device from feeding to discharging in the manufacturing device used in the manufacturing method;Solid-liquid separation device and reactant detection device are arranged between the raw material reaction system and the centrifugal double-layer membrane separation device;Microporous filter membrane with filter pore size 1 μm and nanofiltration membrane with pore size 0.001 μm-0.002 μm are sequentially arranged from inside to outside in the centrifugal double-layer membrane separation device;The intermediate layer of the centrifugal double-layer membrane separation device is communicated with the triple nitrogen gas protection rectifying kettle assembly, and the intermediate layer and the triple nitrogen gas protection rectifying kettle assembly are provided with pre-purified product detection device;The gas and solid discharged from the triple nitrogen gas protection rectifying kettle assembly are all introduced into the three-waste recovery treatment device.The production process of the application is environmentally friendly, the types of raw materials are simple, the emissions are less, and the product purity is high.

The utility model belongs to the technical field of production of imine products, and particularly relates to an efficient solvent distillation safety device for imine products. Comprising a distillation still, the top of the distillation still is connected with a condenser, the condenser is respectively connected with the distillation still and a solvent metering tank through a reflux ratio controller, the distillation still is provided with a temperature control device, the reflux ratio controller is connected with the distillation still through a reflux pipeline, and the reflux pipeline is provided with a sampling pipeline. And the reflux ratio controller controls the liquid flow between the distillation kettle and the condenser by adjusting the reflux ratio, and the reflux and extraction ratio can be randomly set, so that the solvent can be completely evaporated from imine products. And the reflux ratio controller is connected with a DCS (Distributed Control System) to realize automatic control. The sampling pipeline is arranged on the reflux pipeline for sampling detection, so that the percentage of the solvent in the imine product can be detected, and the distillation condition and progress can be conveniently controlled.