853results about "Vacuum distillation separation" patented technology

An aqueous stream cleaning system including a circulation pump to receive a waste fluid and / or a concentrated liquid bottoms stream, and expel a circulation stream. The aqueous stream cleaning system can also include a primary heat exchanger to receive the circulation stream from the circulation pump. The primary heat exchanger can have a plurality of heat exchange plates that define an internal surface area for heat transfer from a distillate stream to the circulation stream to produce a cooled distillate stream and a heated circulation stream. The plurality of heat exchange plates can be spaced to facilitate free flow of solids in the circulation stream between the plurality of heat exchange plates. A mass flow rate and pressure of the circulation stream can be configured to minimize build-up of solids in the primary heat exchanger. The aqueous stream cleaning system can further include an evaporation unit to receive the heated circulation stream from the primary heat exchanger. The distillate stream is formed when steam in the heated circulation stream evaporates in the evaporation unit, and the concentrated liquid bottoms stream is formed from a portion of the heated circulation stream that does not evaporate.

The invention belongs to the technical field of resource regeneration, and particularly relates to a method for recycling hydrochloric acid and germanium through direct two-stage distillation after germanium chlorination distillation, which comprises germanium chlorination distillation, first-stage positive pressure acid steaming, second-stage negative pressure acid steaming and kettle stopping and slag liquid discharging. According to the invention, two-stage acid distillation is directly carried out in the original production equipment system after germanium chlorination distillation, so that the innovation of integrated continuous production of germanium chlorination distillation and acid distillation in the same equipment system is realized, the process is more energy-saving and economic, the operation is simpler and more convenient, the equipment utilization rate is higher, and the environment is more friendly; the recycling rate of hydrochloric acid is up to 60% or above; a one-stage positive-pressure acid steaming process is adopted, high-concentration hydrochloric acid with the HCl molar concentration larger than or equal to 9.5 mol / L is regenerated and can be directly returned to germanium chlorination distillation for use, and synchronous limit recovery of residual germanium in germanium chlorination distillation residues is achieved; therefore, full recycling of hydrochloric acid and germanium in germanium chlorination distillation waste acid and waste residues is realized.

The utility model relates to a high-purity red phosphorus production device which comprises a stainless steel sealed pressure container, an infrared electric heater is arranged in the stainless steel sealed pressure container, an outer-layer high-purity quartz tube is arranged in the infrared electric heater, an inner-layer high-purity quartz tube is arranged in the outer-layer high-purity quartz tube, and an inner-layer high-purity quartz tube is arranged in the inner-layer high-purity quartz tube. Two ends of the inner layer high-purity quartz tube are closed, through holes are formed in the circumferential surface of the inner layer high-purity quartz tube, one end of the outer layer high-purity quartz tube is closed, and the other end of the outer layer high-purity quartz tube is provided with an opening which is hermetically connected with a stainless steel tube joint which is respectively connected with a nitrogen system and a vacuum system after extending out of an end socket of the stainless steel sealed pressure vessel; the stainless steel sealed pressure container is further provided with a nitrogen charging and discharging port which is connected with a nitrogen system. According to the utility model, the nested inner-layer high-purity quartz tube and the nested outer-layer high-purity quartz tube are adopted, discharging is carried out in the inner-layer high-purity quartz tube, red phosphorus is convenient to take out, nitrogen is filled inside and outside the outer-layer high-purity quartz tube, pressure balance inside and outside the outer-layer high-purity quartz tube is kept, and safety is ensured.

Methods and systems for separating a first metal from a metal-containing feed stream are provided. The method can include applying solar energy, for example, by focusing one or more mirrors in one or more heliostats, to heat a metal-containing feed stream in a heating zone to a first temperature to produce a first vapor including the first metal. The first vapor can be condensed in a condensation zone to produce a first liquid including the first metal, and the first liquid can be collected. The system can include a separation unit include a heating zone in fluid communication with a condensation zone and a means for applying solar energy to heat a metal-containing feed stream disposed in the heating zone.

A reactor for coating particles includes a stationary vacuum chamber to hold a bed of particles to be coated, a chemical delivery system, and a paddle assembly. The paddle assembly includes a rotatable drive shaft and a first plurality of paddles and a second plurality of paddles that extend radially from the drive shaft. The spacing, cross-sections, and oblique angles of the paddles are such that orbiting of the paddles causes the first plurality of paddles and the second plurality of paddles to displace substantially equal volumes in opposite directions in the lower portion of the stationary vacuum chamber.

The invention discloses traditional Chinese medicinal material extraction equipment which comprises a heating tank, an evaporation tank and a purification tank, the evaporation tank and the purification tank are in a negative pressure state, the evaporation tank is arranged in the heating tank, the purification tank and the evaporation tank are fixed through a connecting seat, the evaporation tank and the purification tank are connected through a siphon, a steam conveying pipe is arranged on the evaporation tank, and the purification tank is connected with the evaporation tank through a siphon. A condensing pipe is arranged at the top of the purification tank, the bottom end of the condensing pipe extends into the purification tank, the end part of the steam conveying pipe is communicated with the condensing pipe, a plurality of ultrasonic generators are arranged on the inner wall of the purification tank, a filter cartridge for storing traditional Chinese medicinal materials is arranged in the purification tank, and a discharging pipe is arranged at the bottom of the heating tank; the traditional Chinese medicinal material extraction equipment can circularly extract traditional Chinese medicinal materials, so that the extract is concentrated, the extraction process is isolated from the outside, the pollution of the external environment to the extract is avoided, the overall structure is safe and efficient, and the equipment is suitable for popularization and use.

The utility model provides a novel vacuum buffer tank for a reduced pressure distillation device, which relates to the field of distillation devices and comprises a tank body, a pressure pipe is mounted at the upper end of the tank body and is used for being connected with an external distillation device, a fixed disc A is fixedly connected in the tank body, two exhaust ports A are formed in the fixed disc A, and the exhaust ports A are communicated with the tank body. And a fixed disc B is slidably connected into the tank body. According to the novel vacuum buffer tank for the reduced pressure distillation device, through the arranged fixing disc B, when the air pressure in the tank body is increased, a spring A can play a buffering role to prevent the tank body from being damaged due to too large pressure, through the arranged two alarm mechanisms, when the air pressure reaches a preset value, one alarm mechanism can give an alarm, and when the air pressure is too large, the alarm mechanism can give an alarm. The two alarm mechanisms can give an alarm at the same time to remind workers, and the workers are prevented from continuously climbing to the top of the buffer tank to check the pressure gauge to prevent danger caused by excessive pressure.

The utility model relates to a negative-pressure crude benzene distillation system adopting a tubular furnace for heating. The negative-pressure crude benzene distillation system comprises a debenzolization tower, the tubular furnace and a crude benzene condensing, cooling and separating integrated device, the debenzolization tower is sequentially provided with a rectifying section, a stripping section, a storage tank section and a regeneration section from top to bottom; the crude benzene condensing, cooling and separating integrated device comprises a heat exchange tower and a separating tank; a low-temperature water heat exchanger is arranged at the lower part of the heat exchange tower; a crude benzene collecting section, an oil-gas-water separating section and a water collecting section are arranged in the separating tank; a first heating section and a second heating section are arranged in the tubular furnace. Compared with an existing negative-pressure crude benzene distillation process system, the negative-pressure crude benzene distillation process system has the remarkable advantages that the tail gas output is low, the tail gas is not discharged, the tube furnace operation temperature is low, the washing oil consumption is small, no additional separated water is generated, the one-time investment is low, and the like.

The utility model discloses a fractionating tower, which relates to the technical field of fractionating equipment and comprises an alloy tower body and a filler block, one side of the alloy tower body is connected with a discharge pipe fitting in a penetrating manner, the top end of the alloy tower body is connected with a material injection pipe fitting in a penetrating manner, and a positioning mechanism is arranged in the alloy tower body. The positioning mechanism is used for positioning the bottom ends and the top ends of the filler blocks with different sizes so as to meet the use requirements of quick disassembly and distance adjustment of the filler blocks with different sizes, a flow dividing mechanism is arranged under the filler blocks, and the flow dividing mechanism is used for carrying out flow dividing treatment on liquid filtered by the filler blocks, so that the use requirements of quick disassembly and distance adjustment of the filler blocks with different sizes are met. And therefore, blockage of the liquid in the alloy tower body in the flowing process of the liquid is avoided. The supporting bases arranged on the two sides vertically ascend and descend on the outer sides of the vertical guide plates, then the distances of the multiple sets of filler are adjusted, dynamic balance can be kept between the first filler plate and the second filler plate during mass transfer, the first filler plate and the second filler plate are prevented from deforming, and the service life of the filler is prolonged.

The invention relates to a method for extracting and separating polyether polyol in waste salt slag by a water-based method, and belongs to the technical field of separation and purification. The method comprises the following steps: (1) slurrying extraction: mixing polyether polyol salt slag with water according to a certain mass ratio, and carrying out slurrying extraction under a stirring condition to obtain oil-water-salt mixed slurry; (2) performing centrifugal separation to obtain an oil-water mixture rich in polyether polyol; (3) demulsifying and layering to obtain a polyether polyol phase; and (4) refining and purifying: dehydrating the polyether polyol phase to obtain a recycled polyether polyol product. According to the method, water is used as an extraction solvent, so that the use of toxic and flammable organic solvents is completely avoided, the safety and health hidden dangers are fundamentally eliminated, and secondary organic pollution is avoided. By optimizing parameters such as the temperature and the liquid-solid ratio of extraction water and combining centrifugal separation, the polyether polyol can be efficiently extracted and separated from the thick salt slag, and the recovery rate can reach 95% or above.

The invention relates to the technical field of honey processing, in particular to a vacuum concentrator for honey processing, which comprises a concentration tank, a cover, an inner wall scraping mechanism, a stirring mechanism, a collecting plate and a bottom scraping mechanism, the cover is arranged at the top of the concentration tank; the inner wall scraping mechanism is arranged on the inner wall of the concentration tank and is used for scraping honey on the inner wall of the concentration tank; the stirring mechanism is arranged in the concentration tank and is used for stirring honey in the concentration tank; the inner wall of the concentration tank can be scraped, honey is prevented from being attached to the inner wall of the concentration tank, cleaning is not affected, meanwhile, a scraping sleeve connected with a second connecting rod is used for scraping a rotating shaft and stirring blades, the purpose of further scraping is achieved, attached honey is cleaned away, and the concentration tank is convenient to use. Therefore, the use space of the inner wall is increased.

Methods and systems for separating a first metal from a metal-containing feed stream are provided. The method can include applying solar energy, for example, by focusing one or more mirrors in one or more heliostats, to heat a metal-containing feed stream in a heating zone to a first temperature to produce a first vapor including the first metal. The first vapor can be condensed in a condensation zone to produce a first liquid including the first metal, and the first liquid can be collected. The system can include a separation unit include a heating zone in fluid communication with a condensation zone and a means for applying solar energy to heat a metal-containing feed stream disposed in the heating zone.

The application discloses a double-hearth two-stage heating vacuum distillation furnace, which comprises an evaporation furnace and a condensation furnace which are communicated through a gas passage, wherein the evaporation furnace comprises an evaporation furnace body and at least one top heating mechanism which is detachably arranged on the top of the evaporation furnace body; and the condensation furnace comprises a condensation furnace body, a side heating structure and a furnace cover, wherein the condensation furnace body is divided into a temperature control condensation chamber and a plurality of layers of multistage condensation chambers, and the gas passage can be combined or replaced according to the required reaction conditions of different materials. The vacuum distillation furnace can collect different metals through the gradient change of the temperature of the two hearths, reduces the process of secondary distillation of volatile matters after the furnace is stopped, can complete the processing of diversified raw materials, improves the work efficiency and reduces the processing cost; the modular top heating mode directly radiates heat to the materials, improves the heat utilization rate, can realize the working mode of stopping the furnace without stopping the work, helps to improve the work efficiency, and is convenient for completing the furnace cleaning, maintenance and solid material taking and placing.

The invention relates to the technical field of deodorants, and discloses a preparation method and application of an onion extract high-efficiency low-temperature concentrated deodorant, and the preparation method comprises the following steps: S1, dicing onions, soaking in a color protection solution, and draining for later use; s2, putting the diced onions into a supercritical extraction kettle, and extracting by taking ethanol as an entrainer; s3, a mixed system in the extraction kettle is sequentially guided into a first-stage separation kettle and a second-stage separation kettle through a throttling valve; s4, filtering the onion extract crude product through a bifunctional biomimetic membrane, and performing nanofiltration through a nanofiltration system; s5, concentrating the nanofiltration membrane trapped fluid in vacuum low-temperature concentration equipment to obtain an onion extract concentrated solution; s6, preparing microcapsule powder from the onion extract concentrated solution, a solvent, an emulsifier, deionized water and modified beta-cyclodextrin; mixing the microcapsule powder with menthol to prepare a solid deodorant; or compounding with ethanol to prepare liquid spray.

The invention provides a temperature self-adaptive adjustment strategy and device in a high-boiling-point solvent waste liquid recovery process, and the method comprises the steps: executing a first temperature control strategy for a single tower based on a vacuum module, a steam valve and a cold water valve when it is detected that the absolute value of the difference value between the temperature in the single gas-liquid separation tower and a first preset temperature is smaller than a preset difference value; when it is detected that the temperature in the single gas-liquid separation tower reaches a second preset temperature, a second temperature control strategy is executed for the single tower based on the vacuum module, the steam valve and the cold water valve; and according to the first temperature control strategy or the second temperature control strategy, a cooperative temperature control strategy is executed on the rest of the gas-liquid separation towers, so that linkage control over the temperatures in the gas-liquid separation towers in the recovery process of the high-boiling-point solvent waste liquid is achieved. The recovery safety and the recovery efficiency of the high-boiling-point solvent waste liquid are improved.

The present invention relates to the technical field of post-treatment of maleic anhydride, and in particular to a device and method for obtaining maleic anhydride from a gas phase containing maleic anhydride. According to a device for obtaining a maleic anhydride product from a gas phase material flow containing maleic anhydride provided by the present invention, the objectives of simplifying the process, reducing the device investment and reducing the energy consumption can be achieved while effectively controlling the fumaric acid generation amount and the absorbent consumption.

The invention discloses a low-temperature cold-extraction slow-distillation extraction system and method for honeysuckle juice, and relates to the technical field of honeysuckle juice extraction. A vacuum slow distillation stage; a low-temperature purification stage; a fermentation stage and a blending stage; according to the method, low-temperature cold extraction is combined with vacuum gradient slow distillation, degradation of heat-sensitive components such as chlorogenic acid and galuteolin is effectively reduced, and the retention rate of the heat-sensitive components is greatly increased; components with different boiling points are collected by stages through gradient distillation, the extraction rate of functional components such as polysaccharide and flavone is increased, and the problem of component loss caused by a traditional high-temperature process is solved. Low-temperature treatment retains more natural aroma substances, gradient distillation makes the aroma level of the product richer, and the flavor is better than that of the original process; the filtration and alcohol precipitation treatment in the low-temperature purification stage significantly improves the clarity qualification rate of the finished product, and ensures the appearance quality of the product. Distillation residues and mother liquor filter residues are fermented by bacillus subtilis to produce enzyme primary pulp, the comprehensive utilization rate of raw materials is greatly increased, and resource circulation is achieved.

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.

The invention belongs to the technical field of aerospace fuels, and particularly relates to a preparation method and application of a coal-based high-energy-density fuel, and the preparation method comprises the following three steps: firstly, analyzing the content of aromatic hydrocarbon in a coal-based liquid product, and determining the molar weight of the aromatic hydrocarbon; secondly, adding cycloolefin or cycloalcohol according to a molar ratio of 1: (1-1.2), carrying out alkylation reaction under the action of an acid catalyst, and carrying out solid-liquid separation and reduced pressure distillation to obtain an alkylated product; and finally, adding a supported noble metal catalyst for hydrogenation saturation reaction, and separating impurities to obtain the high-energy-density fuel. The coal-based fuel prepared by the method disclosed by the invention not only realizes a major breakthrough from complex separation to integrated reaction in process, but also shows high density, high calorific value and high thermal oxidation stability, has proper viscosity and freezing point performance, and can meet strict requirements of advanced aircrafts under extreme working conditions.

The present invention relates to a composition comprising piperonyl butoxide (PBO) in a concentration of 94 to 99.9% by weight, dipiperidinyl methane (DPM) in a concentration of 0.01 to 1% by weight and dipiperidinyl ether (DPE) in a concentration of 0 to 0.1% by weight, relative to the total weight of the composition, and a distillation process for obtaining the composition, the composition comprising piperonyl butoxide (PBO) in a concentration of from 94 to 99.9% by weight, dipiperidinyl methane (DPM) in a concentration of from 0.01 to 1% by weight, and dipiperidinyl ether (DPE) in a concentration of from 0 to 0.1% by weight.

The invention discloses a device and method for preparing special isocyanate, the device comprises a synthesis device and a separation device, the synthesis device comprises a batching tank, a synthesis reaction kettle, a discharge filter, a discharge circulating pump, a sampler, a flash tank and a crude product conveying pump which are communicated in sequence, and an axial-flow stirrer and a parabolic stirrer are arranged in the synthesis reaction kettle; a catalyst basket is detachably and vertically fixed on the inner side wall of the synthesis reaction kettle; the separation device comprises a negative pressure separation tower, a tower top cooler, a gas-liquid bag, a condensate collecting tank and a tower top reflux pump which are sequentially communicated, and is also provided with a vacuum pump, a tower kettle circulating pump and a product conveying pipeline. The device and the preparation method have the beneficial effects of high synthesis reaction speed, simple and controllable production process, good crude product separation effect and low equipment energy consumption.

The invention discloses a method for separating and refining fusel oil in Fischer-Tropsch synthesis, which comprises the following steps: carrying out pressurized rectification treatment on fusel oil to remove acids, C4 + alcohol and part of n-butyl alcohol, carrying out dehydration treatment on tower top steam after removal through membrane separation, carrying out normal-pressure rectification treatment on a dehydrated intermediate product to remove light components, and carrying out vacuum distillation treatment on the dehydrated intermediate product to obtain the fusel oil. Carrying out reduced pressure rectification treatment on the tower bottoms after the light components are removed to remove propyl alcohol and butanol, carrying out tower top steam condensation on one part of the tower bottoms, returning the other part of the tower bottoms to the tower, extracting an ethanol finished product, carrying out normal pressure rectification treatment on the tower bottoms to remove isopropyl alcohol, carrying out normal pressure rectification treatment on the tower bottoms after removal for separation, and obtaining an n-propyl alcohol finished product at the tower top; and obtaining an n-butyl alcohol finished product from the tower kettle. Through cooperative coupling of multistage rectification and membrane separation, stage-by-stage efficient separation and resource utilization of components with different polarities and boiling points in fusel oil are realized, and three types of products of ethanol, normal propyl alcohol and normal butanol are synchronously produced.

The invention belongs to the technical field of production processes of chemical products, and relates to a device and a method for continuously preparing 2-acrylamido-2-methylpropanesulfonic acid. The annular pipeline reaction system comprises a crystallization reactor, a tubular reactor group and a mother liquor internal circulation pipeline which form an annular passage; the solid-liquid separation refining system comprises a solid-liquid separation device, a reduced pressure distillation device, a product refining device, a drying device and a heat exchanger; the external circulation and feeding system comprises a mother liquor external circulation pipeline, an isobutene feeding pipeline, a sulfuric acid feeding pipeline, an acrylonitrile feeding pipeline and an acrylonitrile reflux pipeline; the acrylonitrile feeding pipeline is divided into three branches, one branch is connected with the crystallization reactor, one branch is converged with the isobutene feeding pipeline, the mother liquor external circulation pipeline and the acrylonitrile backflow pipeline to be connected with an isobutene feeding port, and the other branch is converged with the sulfuric acid feeding pipeline, the mother liquor external circulation pipeline and the acrylonitrile backflow pipeline to be connected with a sulfuric acid feeding port. According to the invention, the production efficiency is improved, and the yield and purity of the product are higher.

The utility model provides an acrylic acid refining process device capable of avoiding acetic acid accumulation. The acrylic acid refining process device at least comprises a dehydrating tower (T110), an acetic acid removing tower (T120) and a light component removing tower (T130), the device disclosed by the utility model can be used for a technical process of obtaining a crude acrylic acid product from propylene oxidation reaction gas through continuous absorption, dehydration and acetic acid removal, an entrainer does not need to be introduced for dehydration and acetic acid removal, the accumulation of acetic acid in the system is effectively avoided, the operation stability of the system is improved, and the yield of acrylic acid is also improved. The device disclosed by the utility model overcomes the defects in the prior art, can be suitable for propylene oxidation reaction gas raw materials with different concentrations, and has extremely remarkable economic benefits and wide application prospects.

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.

An integrated oil filtering and oil storage device and a fully automatic control method. The integrated oil filtering and oil storage device comprises a waste oil tank (400), a first clean oil tank (200), a second clean oil tank (300) and a vacuum oil filter (100), wherein the waste oil tank (400) is provided with a fourth liquid level switch (401) and a fifth liquid level switch (402), which are used for determining the liquid level in the waste oil tank (400) and controlling the start or stop of an oil replenishment process; the first clean oil tank (200) is provided with a first liquid level switch (201) and a second liquid level switch (202), which are used for determining the liquid level in the first clean oil tank (200) and controlling the start or stop of first oil filtering and oil injection processes; the second clean oil tank (300) is provided with an eighth liquid level switch (302) and a ninth liquid level switch (303), which are used for determining the liquid level of clean oil in the second clean oil tank (300) and controlling the start or stop of second oil filtering and oil injection processes. The device has the functions of oil filtering, waste oil storage and clean oil storage; and by means of the liquid level switches, a fully automatic control process is achieved without requiring manual operation, and the functions of automatic oil filtering, automatic clean oil storage and automatic waste oil storage can be achieved, thereby avoiding the risks of device malfunction and misoperation.

The invention concerns a composition comprising piperonyl butoxide (PBO) at a weight concentration in the range from 94 to 99.9%, dipiperonyl methane (DPM) in the range from 0.01 to 1% by weight and dipiperonyl ether (DPE) in the range from 0 to 0.1% with respect to the total weight of the composition, and a distillation process for obtaining the same.

The utility model discloses a device for extracting iris root oil by vacuum distillation, which belongs to the technical field of vacuum distillation extraction and comprises a distillation kettle, a top cover is arranged at the upper end of the distillation kettle, and a support frame is arranged on the top cover. Through the oil-water separation device, oil-water separation can be carried out at the first time by utilizing the oil-water separation device after condensation and liquefaction of an extracted substance, the process can be realized without an additional device, the whole extraction process is simplified, a lifting structure is arranged on an end cover, and when the amount of essential oil and water is changed, the lifting structure is arranged on the end cover; the lifting structure can rapidly adjust the height of the oil suction pipe, it is guaranteed that the tail end of the oil suction pipe is located in essential oil all the time, normal operation of oil-water separation work is guaranteed, the servo motor, the lead screw, the movable sleeve and other structures are adopted, adjustment is flexible and convenient, adjustment at any position can be achieved in the stroke, and the oil-water separation efficiency is improved. And the screw rod and the movable sleeve have a self-locking effect, so that the stability of the adjusted oil suction pipe can be guaranteed.

The present invention discloses an NMP batch distillation device and process. The NMP batch distillation device includes a batch distillation tower, a scraper falling-film evaporation reboiler, a reboiler pump, a tower top condenser, a tower top vacuum condenser, a raw material and intermediate product transfer pump, a water receiving tank, an intermediate product receiving tank, a product receiving tank, and a reflux controller. The tower top condenser is connected to the reflux controller. The reflux controller is connected to the batch distillation tower, the water receiving tank, the intermediate product receiving tank, and the product receiving tank. The raw material and intermediate product transfer pump is connected to the batch distillation tower, the intermediate product receiving tank, and a raw material feed pipe. The reboiler pump is connected to the batch distillation tower and the scraper falling-film evaporation reboiler, and the reboiler pump is a gas-liquid mixing pump. The scraper falling-film evaporation reboiler is connected to the batch distillation tower. According to the NMP batch distillation device and process, a structure and a manufacturing procedure are simple, and a recovered and purified amount of NMP is large.

The invention discloses a low-oxygen-content barium fluoride continuous vacuum distillation purification device and method, and relates to the technical field of barium fluoride purification, the device comprises a vacuum tower, the top surface of the vacuum tower is hermetically connected with a sealing cover, the center position of the top surface of the sealing cover is provided with a vacuumizing mechanism, and the inner side of the sealing cover is provided with a continuous feeding mechanism; a heating mechanism is arranged in the middle of the inner cavity of the vacuum tower; the vacuum pumping mechanism is arranged and used for controlling the continuous feeding mechanism and the heating mechanism while keeping the vacuum degree of the vacuum tower, so that the continuous feeding mechanism controls the continuous feeding speed of barium fluoride based on the barium fluoride distillation and purification speed of the heating mechanism, and the feeding accuracy of barium fluoride is guaranteed.