66 results about "Continuous distillation" patented technology

The utility model discloses a distillation retort for extracting polygonatum odoratum snow pear herbal drink, and relates to the technical field of distillation equipment, the distillation retort comprises a distillation heating retort main body, the top of the distillation heating retort main body is provided with a cover plate, a limiting rod penetrates through the inside of the cover plate, the outer wall of the cover plate is provided with a feed port, the outer wall of the cover plate is provided with a discharge port, and the discharge port is provided with a discharge port. And a sliding rod is mounted on the inner wall of the bottom of the cover plate. Through the arrangement of the sliding rod, the inductor, the sliding sleeve and the floating ball, when a raw material solution is added into the distillation heating tank main body through the feeding hole, the floating ball floats along with the surface of the raw material solution, and the liquid level in the distillation heating tank main body continuously descends through continuous distillation, and when the floating ball descends to the lowest point along with the liquid level, the floating ball is stopped. The floating ball is in contact with the inductor to trigger an alarm to remind a worker of shutdown or continuous addition of a raw material solution, so that dry burning in the distillation heating tank main body is avoided, and the safety of the distillation process of the distillation heating tank main body is improved.

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 rectification systems of chemicals, and particularly relates to a continuous rectification system for ethyl trifluoroacetate. The ethyl trifluoroacetate continuous rectification system comprises a first-stage rectification tower and a second-stage rectification tower, the tower top of the first-stage rectification tower is connected with a first-stage condenser, a gas outlet of the first-stage condenser is connected with a first-stage absorption device, a liquid outlet of the first-stage condenser is connected with an alcohol-containing substance receiving tank, and the alcohol-containing substance receiving tank is connected with a second-stage absorption device. The first-stage rectifying tower is connected with the second-stage rectifying tower, the tower top of the second-stage rectifying tower is connected with the second-stage condenser, a gas outlet of the second-stage condenser is connected with the first-stage absorption device, and a liquid outlet of the second-stage condenser is connected with the finished product receiving tank. The ethyl trifluoroacetate continuous rectification system provided by the utility model is easy to operate, the cost is reduced, the yield of rectified products is improved, and the process is environment-friendly.

The present invention discloses a method for purifying cyclic sulfate for lithium batteries, belonging to the technical field of new lithium battery materials. A crude solution is subjected to processes such as dehydration, pH value control, continuous distillation control crystallization, separation, and drying to obtain a cyclic sulfate product with a purity of ≥99.99%. The method is advantageous in controlling secondary decomposition during the purification process, removing residual acid by using an organic amine acid-binding agent, and combining it with continuous distillation control crystallization technology to achieve stable and orderly crystallization of the product, resulting in a product with high crystallinity and few impurities.

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 provides a distillation system for electronic grade analysis acid, and aims to solve the technical problems of poor distillation continuity and unstable purification quality in the conventional laboratory. The liquid storage tank is provided with a liquid outlet pipeline, and the liquid outlet pipeline is provided with a regulating valve and a pump. The input end of the multi-stage distillation unit is connected with the liquid outlet pipeline, and the multi-stage distillation unit comprises a plurality of distillers which are connected in series. And an acid receiving disc is arranged in each distiller and is used for accommodating condensed acid liquor of the distiller. And the filling unit comprises a turntable and subpackaging bottles. The turntable is communicated with the output end of the multi-stage distillation unit through a connecting pipe and is provided with a filling pipe group. And the split charging bottle is matched with the infusion tube group. And the condensed acid liquid in one acid receiving disc is conveyed to the next distiller for continuous distillation until the target acid liquid flowing out of the output end of the multi-stage distillation unit reaches the electronic-grade purity and flows to the rotating disc to be filled into the subpackaging bottles. And the continuity of the experiment is ensured through the distillation of the multi-stage distillation unit, so that the obtained target acid liquid can be directly filled into a subpackaging bottle.

The invention discloses wastewater treatment equipment for aerogel felt production and a control system thereof, and relates to the field of industrial wastewater treatment. According to the wastewater treatment equipment for aerogel felt production and the control system thereof, the slag removal unit, the evaporation unit and the neutralization unit are arranged as hardware implementation conditions, and meanwhile, the corresponding control system is designed in a matched manner, so that the wastewater treatment equipment is controlled by the control system; automatic waste residue fishing, automatic continuous distillation recovery of an organic solvent in waste liquid and intelligent step-by-step gradient neutralization of an acid solution in the waste liquid are realized, so that the acid liquid can be continuously neutralized and produced, and the produced neutral waste liquid enters the evaporation unit to be evaporated and crystallized; steam generated by evaporation is used for providing heat energy for the distillation mechanism, so that the whole wastewater treatment process has full-automatic and continuous effects, the recovery rate of the organic solvent is high, and the cost is low.

The invention relates to the technical field of plant essential oil extraction equipment, in particular to an efficient eucalyptus leaf crude oil evaporation continuous distillation device which comprises a rack, a material guide mechanism, a first distillation mechanism, a second distillation mechanism and a steam guide-in mechanism. The feeding mechanism is connected with the first distillation mechanism through the material guide mechanism to guide in materials; the first distillation mechanism is arranged in the rack, and the first distillation mechanism is respectively connected with the steam leading-in mechanism and the condensation mechanism to realize automatic distillation and condensation; the second distillation mechanism is connected with the discharge hole of the first distillation mechanism through a material passing mechanism and is used for secondary distillation and condensation of the materials; a feeding frame is arranged at the bottom of the rack and is positioned right below a discharge hole of the second distillation mechanism. The invention provides an efficient evaporation and continuous distillation device for crude eucalyptus leaf oil, which integrates the functions of automatic loading, feeding, discharging, distillation and condensation, and realizes accurate control and continuous operation of production.

The utility model relates to the technical field of heavy wash oil treatment, in particular to continuous distillation water removal equipment for heavy wash oil treatment, and adopts the technical scheme that the continuous distillation water removal equipment for heavy wash oil treatment comprises a heater, a distillation tower, a separation tower, an output pipe, a cooling pipe, a heat dissipation assembly and a bearing assembly, the outer wall of the cooling pipe is provided with an air-cooled heat dissipation assembly, and the lower end of the distillation tower and the lower end of the separation tower are provided with bearing assemblies for assisting the distillation tower and the separation tower to stably support the distillation tower and the separation tower. The cooling pipe is matched with the heat dissipation assembly to efficiently cool the steam, so that the steam is condensed into liquid to flow into the separation tower, the condensed liquid is subjected to oil-water layering through the separation tower, water on the upper layer is discharged outwards through the drainage pipe, and heavy oil on the lower layer flows into the distillation tower through the return pipe to be subjected to secondary distillation water removal; therefore, the continuous and circular water removal work is realized.

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.

A device for continuously distilling primary oil from plant raw materials belongs to the field of chemical energy equipment engineering, and is characterized in that the plant raw materials are crushed and infiltrated before being distilled by arranging a crusher, a spiral conveyor, a condenser and a water-oil separator, and then are directly fed into a distillation tower by a spiral push rod to be distilled, and a spiral slag extractor is arranged at a discharge hole of the distillation tower; a gas outlet in the top of the distillation tower is connected with the condenser, the condenser is connected with the water-oil separator, the whole device integrates crushing, infiltrating, feeding, discharging, condensing, separating and deslagging, continuity is high, intermittent operation is not needed, distillation efficiency is greatly improved, the purpose of thorough distillation is achieved, the raw material distillation time can be grasped, and the operation is convenient. Working hours can be shortened, and working hours and cost are saved.

The invention discloses a brewage device of mousse Lisi wine and a fermentation brewage process of high-temperature-resistant yeast, and relates to the technical field of wine brewage, the brewage device comprises a steam generation assembly, a continuous distillation assembly and a cooling liquefaction assembly, the steam generation assembly is provided with a steam boiler capable of generating steam, and an air outlet pipe is horizontally arranged above the steam boiler; the output end of the steam boiler is communicated with the air outlet pipe; the continuous distillation assembly comprises two mounting frames, mounting rings are fixedly arranged on the mounting frames, a distillation cylinder is rotationally arranged between the two mounting rings, the continuous distillation assembly further comprises a motor used for driving the distillation cylinder to rotate, one mounting ring is connected with a feeding pipe, the other mounting ring is connected with a discharging pipe and a steam discharging pipe, and the steam discharging pipe is connected with the motor. The gas outlet pipe penetrates through the distillation cylinder and is coaxially, hermetically and rotatably connected with the distillation cylinder, a storage tank is arranged above the distillation cylinder, and the storage tank is connected with the feeding pipe. According to the distillation device, materials are conveyed in the distillation process.

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.

The present invention relates to a high-efficiency continuous distillation device and a continuous distillation process, belonging to the field of distillation processing, comprising: a tower body and a packing column arranged in the tower body, the tower body being provided with a detection device for detecting wall flow phenomenon, the tower body being provided with a flow guiding device for causing the liquid in the packing column to flow toward the central axis of the packing column, when the detection device detects that a wall flow phenomenon occurs in the tower body, the flow guiding device starts to work, when the present application is in use, when the detection device detects that a wall flow phenomenon occurs in the tower, the flow guiding device starts to work, the flow guiding device causes the liquid in the packing column to have an inward movement trend, thereby achieving a balance between the outward movement trend of the liquid and the inward movement trend, effectively solving the wall flow phenomenon without increasing the height of the packing column, improving production efficiency and reducing production costs.

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.

The utility model relates to the technical field of essence production, and discloses rotary continuous distillation essence production equipment which comprises a tank body, a feeding pipe is arranged on one side of the outer surface of the tank body, a discharging pipe is arranged on the other side of the outer surface of the tank body, a cooling box is arranged in the tank body, and a connecting box is arranged on the upper side of the inner bottom wall of the tank body. A device pipe is arranged in the connecting box, a connecting rod is arranged in the device pipe, an auxiliary pipe is arranged on one side of the outer surface of the device pipe, an inserting rod is arranged in the auxiliary pipe, a movable rod is arranged on one side of the outer surface of the inserting rod, and a spring is arranged on one side of the outer surface of the movable rod. According to the cooling box, when the threaded rod rotates, the threaded plate drives the movable plate to move up and down, the movable rod can drive the inserting rod to move left and right under the action of the spring and the movable plate, when the inserting rod is disconnected with the connecting rod, the cooling box can be taken down, and therefore the effect of replacing the cooling box is achieved.

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 present invention discloses a fully automatic continuous distillation range determination system for petroleum products, which includes an automatic continuous sampling device, a distillation device, a sample receiving and reading device, and a system control device. The automatic continuous sampling device includes a sampling turntable, a constant temperature automatic sampling mechanism, and a stepping motor. The distillation device includes a distillation flask and a heating mechanism. The sample receiving and reading device includes a distillate sample receiving and reading device and a residue sample receiving and reading device. The system control device is used to control the operation of the fully automatic continuous distillation range determination system for petroleum products. The fully automatic continuous distillation range determination system for petroleum products of the present invention is an integrated determination system, which can realize automatic continuous sampling, automatic distillation, automatic measurement of the recovered volume and residues during the distillation range determination, and calculate the distillation data of the sample through atmospheric pressure correction, so as to solve the problems of inaccurate sample measurement, differences generated during sample transfer and recovery, and inability to continuously determine in traditional distillation range determination.

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%.