47 results about "Continuous distillation" patented technology

Embodiments of systems and methods for enhancing control of a distillation operation are disclosed. The method includes obtaining data for a plurality of ongoing and continuous distillation operations from one or more of (a) a plurality of sensors or (b) a plurality of analyzers configured to analyze fluid output via the distillation operations. The method may include determining one or more parameters for each one or more of one or more distillation columns or distillation control devices based on application of the data to a machine learning model. The method may include in response to determination of the one or more parameters, operating each of the one or more distillation columns or distillation control devices based on the one or more parameters, thereby to enhance operation of the one or more distillation column.

The invention relates to a distillation unit (100 000) which is designed for a continuous distillation process and to a method for a continuous operation for separating a liquid substance mixture (10) into two to six liquid product flows (201, 202, . . . ) with different compositions and into a gaseous product flow (300). For this purpose, an evaporation unit (10 000) is provided consisting of multiple evaporation devices (10 000-1, 10 000-2, . . . ), wherein each evaporation device has a circuit device (1 200-1, 1 200-2, . . . ) for recirculating a sub-quantity of each of the liquid sump flows (22, 21, . . . ) of an evaporation device into the respective evaporation device, and each of the circuit devices additionally has a discharge device (1 300-1, 1 300-2, . . . ) for providing one of the liquid product flows (201, 202, . . . ).

The utility model belongs to the technical field of white spirit distillation, and particularly relates to continuous distillation equipment for multistage fractionation in a transition area. According to the continuous distillation equipment for multi-stage fractionation in the transition area, the multi-stage fractionation cover and the fractionation structure connected with the multi-stage fractionation cover are arranged between the foreshot steam collecting cover and the high-quality wine steam collecting cover or between the high-quality wine steam collecting cover and the after-run steam collecting cover, and the thermometer and the micromanometer in the fractionation structure are used for detecting wine gas parameter data in real time; the control module and the three-way switching valve are combined to precisely regulate and control the flow direction of the wine gas, so that the wine gas is selectively fractionated to the foreshot liquid collector, the high-quality wine liquid collector or the after-run collector, the problem of mixing and mixing of the wine gas among all sections of wine liquid collection in traditional equipment is effectively avoided, the fractionation precision is remarkably improved, and the fractionation efficiency is improved. The mixing rate of foreshot liquid, high-quality wine and after-run is greatly reduced, the problems of response lag and poor stability caused by manual operation are reduced, the distillation efficiency is improved, the wine quality is guaranteed, and the resource waste and the energy consumption cost are reduced.

The utility model relates to the technical field of chemical engineering, in particular to an energy-saving continuous distillation device which comprises a distillation box, a first supporting plate, a second supporting plate and a heat preservation cover are fixedly installed on the distillation box, a first filter box is installed on the first supporting plate, and a first pipeline matched with the distillation box and the heat preservation cover and used for conveying waste gas is arranged on the first filter box. A filter box II is mounted on the support plate II, and a pipeline II which is matched with the distillation box and is used for conveying the wastewater is arranged on the filter box II. The first filter box is arranged on the distillation box, impurities in waste gas are intercepted through the filter element, the intercepting cylinder, the filter cylinder, the filter cotton and the activated carbon layer in the first filter box, the waste gas is conveyed into the heat preservation cover after being filtered, and the heat preservation cover can conduct continuous heat preservation on the distillation box; the second filter box is arranged on the distillation box, the wastewater and the flocculating agent are stirred through the net blades in the second filter box, the wastewater can be filtered again through sand gravels, and then the surrounding environment is protected.

The utility model belongs to the technical field of white spirit distillation. According to the continuous distillation equipment capable of directly utilizing the after-run steam disclosed by the utility model, the after-run steam is directly recovered and is recycled after being pressurized and heated, so that dual energy loss in a traditional condensation-re-distillation process is avoided, after-run cooling water does not need to be preset, meanwhile, the heat energy consumption is reduced by 40%, and the production cost is greatly reduced. Ethyl acetate and other heat-sensitive components in the after-run do not need to be subjected to a re-steaming link, flavor loss is reduced, the recovery rate of ethyl acetate in the after-run is increased to 98% from 80%, the content of ethyl hexanoate in high-quality liquor is increased by 15%, and the aroma coordination and quality stability of the liquor are effectively guaranteed. And after-run steam compression and cyclic utilization functions are integrated, a traditional liquid storage tank, a pumping system and re-steaming equipment are omitted, and the equipment investment and maintenance cost are reduced. The condensation liquid of the after-run part and the uncondensed wine steam are uniformly converted into saturated wine steam for recycling through the compression equipment, closed-loop recycling of after-run components is achieved, waste is avoided, and the utilization rate of raw materials is increased.

The utility model discloses an automatic white spirit distilling machine, relates to the field of white spirit production, and aims to solve the technical problems that distilled white spirit raw materials on a steamer can be unloaded only after the steamer is lifted up and moved out through a crane after the existing steamer is used for distilling the white spirit raw materials in the prior art. The continuous distillation operation efficiency of the white spirit raw materials is relatively low. Rectangular openings are formed in the upper ends of the middles of the two sides of the steamer pot and the upper ends of the middles of the front end and the rear end of the steamer pot, a rectangular movable cover is fixedly connected to the position, on the outer side end face of the steamer pot, of the outer side of each rectangular opening, a steamer body is arranged in the middle of the interior of the steamer pot, and rectangular lifting plates are fixedly connected to the middles of the two sides of the steamer body; hydraulic rods are fixedly connected to the upper end face of the bottom plate and located on the two sides of the steamer pot, the hydraulic rods drive the steamer to ascend and descend, quick discharging of distilled liquor raw materials is achieved, secondary lifting through a crane is not needed, the production efficiency is remarkably improved, and the labor cost is reduced.

This utility model provides a continuous distillation system for honeysuckle juice, relating to the field of honeysuckle distillation. It includes: a distiller, a permeable bed within the distiller, a drive motor fixed to the top of the distiller, a rotating shaft fixed to the output shaft of the drive motor, a sleeve fitted onto the outer wall of the rotating shaft, and two rotating plates with open bottoms. In this system, when honeysuckle is spread on the permeable bed for distillation, the drive motor simultaneously rotates the rotating shaft, which in turn rotates the sleeve, which in turn rotates the rotating plates. The rotating plates then rotate the connecting plate and the comb teeth. Simultaneously, the elasticity of the spring causes the connecting plate to move elastically, which in turn causes the comb teeth to move elastically, causing them to come into contact with the honeysuckle on the permeable bed. Thus, the rotation of the comb teeth agitates the honeysuckle on the permeable bed, facilitating thorough distillation and improving the distillation effect.

The invention discloses a preparation method of electronic-grade epoxy resin, and relates to the technical field of epoxy resin, and the preparation method comprises the following steps: S1, preparing and mixing raw materials: according to detection data of total chlorine in the epoxy resin, preparing a dechlorinating agent with corresponding metering, and uniformly mixing the epoxy resin and the dechlorinating agent; s2, heating reaction: heating the mixed material under the protection of nitrogen, and removing low-boiling-point substances at the same time; s3, molecular distillation separation: continuously distilling to obtain low-total-chlorine target resin, and removing chlorine-containing polymer impurities out of the system in a kettle residue form; and S4, product collection and detection. According to the preparation method of the electronic-grade epoxy resin, the chlorine removal agent is accurately metered and uniformly mixed with the epoxy resin, the mixture is heated and reacted under the protection of nitrogen, low-boiling-point substances and chlorine-containing impurities are effectively removed, continuous distillation is performed by utilizing a molecular distillation technology, low-total-chlorine target resin is further successfully separated, and the total chlorine content in the epoxy resin is remarkably reduced.

According to the evaporation tower for producing isophthaloyl / paraphthaloyl chloride provided by the utility model, in a working state, an isophthaloyl / paraphthaloyl chloride solution enters a reaction liquid inlet above the evaporation tower, heat-conducting oil enters a heating jacket, and the heat of the heat-conducting oil heats the isophthaloyl / paraphthaloyl chloride solution in a spiral disc groove through the inner wall of the evaporation tower, so that the isophthaloyl / paraphthaloyl chloride is produced. Thionyl chloride and N, N-dimethylformamide in the paraphthaloyl chloride solution are evaporated into gas in the spiral disc grooves under a micro-negative pressure vacuum condition, the gas is led out from the top of the evaporation tower, finally, the purity of the paraphthaloyl / paraphthaloyl chloride solution is improved after the paraphthaloyl / paraphthaloyl chloride solution is subjected to high-temperature evaporation of the multiple layers of spiral disc grooves, and the paraphthaloyl / paraphthaloyl chloride solution is discharged from a liquid outlet below the evaporation tower. Compared with the existing conventional tower kettle type intermittent evaporation equipment, the evaporation tower provided by the utility model can perform continuous distillation, shorten the operation period, improve the production efficiency, fully utilize the waste heat of the conduction oil of the reaction kettle and improve the energy utilization rate.

The application discloses a cinnamon deep processing device, which comprises a bottom plate, a distillation cylinder is arranged at the upper end of the bottom plate, one end of the distillation cylinder is provided with a feeding port, the other end is provided with a discharging port, an air inlet pipeline and an air outlet pipeline are arranged side by side outside the distillation cylinder, a material scattering assembly is arranged in the distillation cylinder, a plurality of material scattering plates are rotationally connected to the material scattering assembly, in the material scattering state, the material scattering assembly is driven to rotate so as to push the raw materials to move from one end of the distillation cylinder to the other end, and the material scattering plates are used for scattering and spreading the raw materials. The cinnamon deep processing device has the beneficial effects that: the raw materials are conveyed from one end of the distillation cylinder to the other end through the arranged material scattering assembly, the new raw materials are conveniently fed, and the distilled raw materials are conveniently discharged, so that continuous distillation processing is realized; meanwhile, the raw materials accumulated in the distillation process are scattered and spread through the arranged material scattering plates, water vapor is fully contacted with the raw materials, and the cinnamon oil in the raw materials is fully distilled.

The invention belongs to the field of preparation of hydroxybutyl acrylate by a continuous rectification device, and particularly relates to a hydrophobic mesoporous confinement type Sn < 2 + >-SO3H double-acid-site magnetic polymer solid acid catalyst as well as a preparation method and application of the hydrophobic mesoporous confinement type Sn < 2 + >-SO3H double-acid-site magnetic polymer solid acid catalyst. The invention synthesizes a hydrophobic mesoporous confinement type Sn < 2 + >-SO3H double-acid-site magnetic polymer solid acid catalyst Fe3O4 (at) mP (St-FD-Sn)-SO3H, the catalyst integrates two different catalytic active centers (Sn with Lewis acidity and-SO3H with Bronsted acidity), the catalyst has a better catalytic effect, and the ester exchange reaction can reach a higher yield. Compared with the traditional purification method that rectification purification is carried out after continuous extraction, the method adopting continuous rectification for product purification has the advantages that the introduction of an extracting agent is reduced, the product is purer in quality and higher in yield, and the production cost is obviously reduced.

The invention provides an automatic feeding device for refining lavender essential oil, which is applied to the field of essential oil refining, and comprises a distillation retort and a metering valve, and further comprises a main feeding mechanism, the main feeding mechanism comprises an inner tank body and a steam release plate, and the inner tank body is provided with a through notch; the auxiliary feeding mechanism comprises a shaft pipe and a steam recovery plate, and the angles of the main feeding mechanism and the auxiliary feeding mechanism relative to the distillation retort can be independently or synchronously adjusted; the device further comprises a cooling tank and a steam tank; automatic quantitative feeding can be achieved through the metering valve, the adding amount of raw materials and distribution of the raw materials in the distillation retort can be accurately controlled in cooperation with rotation adjustment of the main feeding mechanism and the auxiliary feeding mechanism, it is guaranteed that the raw materials make full contact with steam in the distillation process, the essential oil refining efficiency is remarkably improved, and it is guaranteed that the distillation process is stably and continuously carried out; the quality of the lavender essential oil is effectively improved.

The invention relates to a method and a device for continuously distilling white spirit through nitrogen closed circulation segmented stripping and multi-stage liquor picking, which are characterized in that closed circulation nitrogen is used as a carrier to perform white spirit distillation, graded liquor picking and total condensate recovery, so that a waste-free process is realized; carrier gas circulation is driven by a nitrogen expansion / compressor unit, heat / cold is supplied to push evaporation / condensation heat and mass transfer, and the process is low-carbon and efficient; the continuous white spirit distillation process of continuous feeding and continuous discharging of fermented grains is realized through the semi-closed automatic feeding / discharging device and the rotary half-tube combined tray. By adopting the technology provided by the invention, the high-degree white spirit is prepared by continuously distilling the fermented grains with the moisture content of 60% and the ethanol content of 6%, and the distillation energy consumption of a unit product (folded into pure ethanol) is 0.98 kWh (electricity) / 1kg of ethanol, so that the technology has great significance on high-quality and low-carbon development of the solid fermented wine industry.

Embodiments of systems and methods for enhancing control of a distillation operation are disclosed. The method includes obtaining data for a plurality of ongoing and continuous distillation operations from one or more of (a) a plurality of sensors or (b) a plurality of analyzers configured to analyze fluid output via the distillation operations. The method may include determining one or more parameters for each one or more of one or more distillation columns or distillation control devices based on application of the data to a machine learning model. The method may include in response to determination of the one or more parameters, operating each of the one or more distillation columns or distillation control devices based on the one or more parameters, thereby to enhance operation of the one or more distillation column.

The utility model discloses a continuous distillation device in MCPP propionic acid production, which comprises a base as well as a distillation tower and a condensing tower which are arranged on the base, and further comprises a dispersion component which is arranged in the distillation tower and is used for dispersing discharged MCPP propionic acid mixed liquor, and the dispersion component comprises a fixed ring which is fixedly connected to the inner wall of the distillation tower, the fixing ring is located above the tower plate, the side, away from the tower plate, of the fixing ring is connected with a dispersion hollow ring through a positioning assembly, and the ends, close to each other, of the two corrugated pipes are fixedly connected with an L-shaped liquid outlet pipe. According to the utility model, through the arrangement of the dispersing assembly, the MCPP propionic acid mixed solution flows to the tower plate at different positions, so that the discharging uniformity of the MCPP propionic acid mixed solution is improved, and the risk of local accumulation or bias flow on the tower plate due to higher viscosity and single discharging position of the MCPP propionic acid mixed solution is reduced.

The present application relates to the field of polyolefin catalyst mother liquor treatment, and discloses a heat coupling heat exchange equipment for continuous distillation and a continuous distillation method of polyolefin catalyst mother liquor. The heat coupling heat exchange equipment for continuous distillation comprises an evaporation unit for continuously distilling materials, a heat exchange unit connected with the top of the evaporation unit, comprising an upper feed preheating section for heat exchanging the top fraction from the top of the evaporation unit with feed and a lower cooling section for cooling the top fraction after heat exchanging with feed, and a feed unit partially arranged in the upper feed preheating section for feeding the material preheated by the upper preheating section into the evaporation unit for evaporation. By using the heat coupling heat exchange equipment and method for continuous distillation, the control of the temperature of the feed material is more stable, and the operation stability of the evaporation device can be improved.

The invention provides a hydrogen chloride rectification tank, a hydrogen chloride rectification method and a high-purity hydrochloric acid preparation system, and belongs to the technical field of high-purity hydrochloric acid preparation. The hydrogen chloride rectification tank comprises a rectification outer tank and a baffling distillation assembly. The hydrogen chloride rectification method is implemented based on a hydrogen chloride rectification tank. The high-purity hydrochloric acid preparation system comprises the hydrogen chloride rectification tank. The continuous distillation process of crude hydrochloric acid baffling preheating, distillation and hydrogen chloride release-hydrogen chloride dissolution to form secondary hydrochloric acid-secondary hydrochloric acid baffling preheating, secondary distillation and hydrogen chloride release can be realized, and heat in the crude hydrochloric acid baffling preheating and distillation processes is synchronously used for secondary hydrochloric acid preheating; meanwhile, the two distillation processes are both carried out in the rectification outer tank, only one inlet and one outlet are provided for the outside, no additional connecting structure is added, and the leakage risk of hydrogen chloride is low.

This invention relates to a continuous distillation apparatus and method for crude m-phenylenediamine. The apparatus includes a first light-removal column (1), a first reboiler (2), a first column bottom circulation pump (3), a first column bottom outlet pump (4), a first column top condenser (5), a first column top reflux tank (6), a first column top reflux outlet pump (7), a second light-removal column (8), a second reboiler (9), a second column bottom circulation pump (10), a second column bottom outlet pump (11), a second column top condenser (12), a second column top reflux tank (13), a second column top reflux outlet pump (14), a product column (15), a product column reboiler (16), a product column bottom circulation pump (17), a product column bottom outlet pump (18), a product column top condenser (19), a product column top reflux tank (20), and a product column top reflux outlet pump (21). The continuous distillation method for m-phenylenediamine of this invention can obtain m-phenylenediamine with a purity of 99.99%.

Systems and methods are provided for using high temperature heat pumps for recovering heat from chemical processes, and in particular, systems and methods are provided for operating heat pumps integrated into continuous distillation processes.

This utility model relates to the field of distillation column technology, specifically a high-efficiency and energy-saving distillation column with a protective mechanism. It includes a distillation column body, an isolation component for external protection located below the column body, a protective filter component for intercepting and filtering the added liquid located near the top on the left side of the column body, and a cleaning structure with an inner wall scraper at the top of the column body. The cleaning structure includes a main shaft connected to a motor and its output shaft, with a scraper plate at the end of the main shaft. This high-efficiency and energy-saving distillation column with a protective mechanism, by combining the isolation component with the column body for external protection, and the partition plate dividing the interior of the filter box into a sedimentation chamber and a filtration chamber, allows the added solution to pass through a sedimentation chamber and a filter with absorbent cotton, intercepting and filtering particulate matter in the solution. The motor and main shaft, along with the scraper plate, scrape the inner wall of the distillation column body, reducing material adhesion and coking on the inner wall, thus minimizing impact on continuous distillation.

This utility model relates to the field of extraction equipment technology, and in particular to a device for continuous distillation of disperse dye mother liquor to recover methanol and DMAC. The device includes a methanol extraction unit, a DMAC extraction unit, a condenser, and a methanol storage tank. The methanol extraction unit has an inlet pipe, an outlet pipe, and a vaporized methanol flow pipe. The output end of the vaporized methanol flow pipe is connected to the shell-side inlet end of the condenser. A liquefied methanol flow pipe is installed on the shell-side outlet end of the condenser, and its output end is connected to the methanol storage tank. A first reflux pipe is installed in the middle section of the liquefied methanol flow pipe and is connected to the inlet pipe. The methanol storage tank has a second reflux pipe, the output end of which is connected to the first reflux pipe. The output end of the outlet pipe is connected to the DMAC extraction unit. Through the cyclic extraction and purification loop of the methanol extraction unit, condenser, and methanol storage tank, the methanol recovery rate and purity are improved.

The utility model relates to a feeding device of a system for continuously distilling and purifying crude indium, aiming at solving the problems of low efficiency, oxidation film pollution and impurity accumulation in the traditional batch distillation. The device comprises a distillation furnace, a raw material furnace and a material conveying pipe, seamless connection between normal pressure of the raw material furnace and vacuum of the distillation furnace is realized through a pressure difference self-driven feeding structure, and shutdown cooling is avoided. The bottom of the raw material furnace is provided with a suction groove, the top is additionally provided with a filter ring to intercept an oxide film in real time, micro-positive pressure protection is formed in cooperation with nitrogen purging, and non-metal impurities such as O and C are reduced. The double-circulation parallel mode enables the melting time of the raw material furnace and the working time of the distillation furnace to be overlapped, and the single-batch interval time is shortened. The design of conveying pipe heating and kettle body heat preservation reduces energy consumption, and a circulating water system is optimized to prolong the service life of the crucible. According to the device, the whole process of distillation-feeding-pretreatment is continuous, the purity of finished indium is high, the utilization rate of equipment is improved, and the device is suitable for the production field of high-purity indium such as semiconductors and ITO (Indium Tin Oxide) target materials.

The invention provides a full-automatic continuous distillation instrument and relates to the technical field of substance component analysis. The device specifically comprises a detection unit and a sample injector. The detection unit comprises a first frame body, and a distillation subassembly, a heating subassembly, an overturning subassembly, a cleaning subassembly, a receiving subassembly, a first liquid adding subassembly and a detection subassembly are arranged on the first frame body. A condenser and a distillation pipe of the distillation subassembly can move up and down, the overturning subassembly is used for driving the distillation flask to overturn, and the heating subassembly comprises a heating device capable of moving up and down. The receiving subassembly comprises a rotatable first workbench, a receiving bottle is arranged on the first workbench, and a receiving station of the receiving subassembly is located under the condenser. The sample injector comprises a rotatable second working table, and a sample bottle is arranged on the second working table. The sample injection part comprises a sample injection pipe capable of moving up and down and horizontally, and the sample injection pipe is connected with a sample injection pipe of the first liquid injection subassembly through a sample injection pump. The distillation instrument can meet the high-efficiency detection requirement of a large batch of samples.

The present invention discloses a method and apparatus for purifying ultra-high purity hydrogen fluoride, which purify it through a continuous distillation process by putting crude hydrogen fluoride instead of hydrogen fluoride into a multi-stage distillation column as it is, and remove impurities in hydrogen fluoride through a contact with fluorine gas having the concentration of the F2 gas automatically controlled depending on the content of arsenic fluoride that is an impurity.

The utility model discloses a rosin continuous distillation device, which belongs to the technical field of rosin processing, and comprises an outer tank body, a discharge pipe arranged at the lower end of the outer tank body, an inner tank body fixed inside the outer tank body, two steam guide pipes arranged between the inner tank body and the outer tank body, and a gas guide pipe fixed on the upper side of one end of the inner tank body, a cooling tank is fixed to the other end of the gas guide pipe, a cooling coil is arranged in the cooling tank, a circulating assembly is arranged on one side of the cooling tank, and a cleaning assembly is arranged in the inner tank body; the cleaning assembly is arranged, the motor is started to drive the rotating shaft to rotate, the rotating shaft rotates to drive the transverse rod to rotate, the transverse rod rotates to drive the scraping frame to rotate to clean the inner wall of the inner tank body, the cleaning assembly is arranged to clean the inner wall of the inner tank body, and impurities or oxide layers are prevented from being attached to the inner wall of the inner tank body after the inner tank body is used for a long time. Therefore, the subsequent heating efficiency of the steam conduit in the inner tank body is influenced.

The invention relates to a vertical spiral continuous distillation wine taking method and device. The device comprises one or more vertical distillation towers, wherein each vertical distillation tower is provided with a feeding unit, a conveying unit, a steam unit and a monitoring unit; the conveying unit is used for realizing continuous conveying of materials in and / or among vertical distillation towers which continuously perform distillation liquor taking operation, the steam unit is used for providing steam for the distillation process, the monitoring unit is used for monitoring process parameters and equipment running states of the vertical distillation towers in real time, and the central control unit is in communication connection with the monitoring unit. And the plurality of vertical distillation towers are connected in series. The method comprises the following steps: feeding blended vinasse into a feed hopper; a steam unit is started to generate secondary steam, a conveying unit is started, and a discharging baffle is opened; vinasse on the chain plate is driven by the conveying chain to spirally move downwards around the axis of the vertical distillation tower, and steam reversely flows through the vinasse for distillation and wine taking; and the wine steam is cooled through the condenser and is classified and stored.

The application discloses a nitromethane continuous distillation device, and relates to the technical field of nitromethane separation.The application has the advantages that the distillation device body is provided with an outer cylinder and an inner cylinder connected in sequence from the outside to the inside at the rear end of the distillation device body, a jacket is connected to the outer wall of the outer cylinder, and a hollow roller shaft is rotatably connected to the inner wall of a through hole in the middle of the distillation device body.The device adopts a double heating mode, significantly improves the uniformity of material heating, continuously rotates an auger to push the axial transmission of the material, realizes continuous feeding, continuous distillation and continuous discharging, and the spiral blades rotate synchronously with the inner cylinder to continuously scrape off the impurities on the inner wall of the outer cylinder, so that the heat conduction surface is kept clean and uniform, and the product purity and production stability are improved.The application effectively solves the problems of low intermittent operation efficiency, uneven heating and inner wall scaling of the existing nitromethane distillation device, realizes the continuous production of nitromethane, and has important industrial application value.

The utility model discloses a chemical raw material preparation distillation device, and belongs to the technical field of chemical distillation equipment. The device mainly comprises a distillation retort, a sealing cover is hinged to the distillation retort, an air outlet pipe is arranged on the sealing cover, the air outlet pipe is communicated with a filtering mechanism, the filtering mechanism comprises a support installed on the distillation retort, two sets of filtering cylinders are arranged on the support, the two sets of filtering cylinders are arranged in parallel, and the two sets of filtering cylinders are each provided with an inlet and an outlet. The air outlet pipe is communicated with an input pipe, the input pipe is provided with a first valve, the first valve is respectively communicated with the inlets of the two groups of filter cartridges, the output pipe is provided with a second valve, and the second valve is respectively communicated with the outlets of the two groups of filter cartridges. According to the distillation device for preparing the chemical raw materials, the two groups of filtering mechanisms connected in parallel are arranged, so that one group of filtering mechanisms can be alternately used according to conditions in the distillation process, and continuous distillation operation of the chemical raw materials can be better matched.

The method comprises the following steps: mixing flower and fruit herbal raw materials with fermented grains and high-temperature yeast according to a specific ratio, and preparing fragrant grains by adopting a fermentation mode in a pit, or mixing the flower and fruit herbal raw materials with glutinous rice and black koji in the high-temperature yeast according to a specific ratio, and preparing the fragrant fermented grains in a cellar fermentation mode. The flower and fruit flavor in the fragrant fermented grains prepared by the method is obvious and comfortable, and the flower and fruit flavor of the produced raw wine can be effectively improved in a manner of vertical cross steaming or uniform mixing distillation with the fermented grains, so that the wine body has the obvious flower and fruit flavor with high comfort.

A phosphorus trifluoride (PF3) using a continuous distillation column, according to the present invention, utilizes: a first distillation column in which a mixture containing at least a portion of PF3 is distilled to discharge PF3, HCl, HF, PCl3, and acetonitrile from the column bottom and discharge a mixture of PF3, HCl, and N2 from the column top; a second distillation column in which the mixture of PF3, HCl, and N2 is distilled to discharge PF3 and HCl from the column bottom and discharge the mixture of PF3 and N2 from the top column; and a third distillation column in which the mixture of PF3 and N2 is distilled to discharge PF3 from the column bottom and discharge N2 from the column top.