4299results about "Fractional distillation" patented technology

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

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

The utility model relates to the technical field of heat pump rectification, and particularly discloses a heat pump rectification system which comprises a rectification tower; the tower top gas liquefaction system comprises a compressor connected with a gas phase at the top of the rectifying tower, and a reboiler, a throttling device, a condenser and a flow divider which are sequentially connected with the compressor; liquid phase connection at the bottom of the rectifying tower is communicated with the reboiler, the tower bottom reboiling system comprises an auxiliary reboiler and a flash evaporator which are sequentially communicated with the reboiler, and the flash evaporator is communicated to the rectifying tower; and the gas phase at the top of the rectifying tower is heated by the compressor and then enters the reboiler to exchange heat with the liquid phase at the bottom of the rectifying tower, so that the rectifying energy consumption can be reduced, and the energy-saving effect is achieved.

The invention belongs to the technical field of chemical production, and particularly relates to an efficient energy-saving refining system for producing cyclohexanone through dehydrogenation, which comprises an alcohol tower, a dehydrogenation heat exchanger, a dehydrogenation reactor, an alcohol tower feeding heat exchanger, a dehydrating tower, a light tower I, a light tower II, a ketone tower and an alcohol recovery tower which are connected in sequence, a middle feeding port of the alcohol tower is communicated with a tube pass discharging port of the alcohol tower feeding heat exchanger, a top discharging port of the alcohol tower is communicated with a tube pass feeding port of the dehydrogenation heat exchanger, a bottom discharging port of the alcohol tower is communicated with a middle feeding port of the alcohol recovery tower, and an alcohol ketone drying tower is additionally arranged between the alcohol tower feeding heat exchanger and the dehydration tower. A feed port of the alcohol ketone drying tower is communicated with a shell pass discharge port of the alcohol tower feed heat exchanger, and a liquid phase discharge port of the alcohol ketone drying tower is communicated with an upper feed port of the dehydrating tower. The alcohol tower adopts a process that raw materials directly enter the tower top, tower top reflux is cancelled, steam consumption is reduced, and the purpose of saving energy is achieved.

The invention relates to the technical field of chemical engineering, in particular to a method and a device for removing heavy components from cyclohexanol. Comprising the following steps: a, rectifying a cyclohexanol-containing material from a cyclohexene hydration reaction to obtain a first solution containing cyclohexanol and heavy components in a tower kettle; b, carrying out heavy component removal operation on the first solution to obtain a third solution containing a catalyst and heavy components, a first gas phase and a second gas phase; and c, rectifying the first gas phase and the second gas phase to obtain a fourth solution subjected to heavy component removal, namely cyclohexanol subjected to heavy component removal. The entrained catalyst and heavy components are removed together, and the fluidity required by the catalyst waste liquid is maintained by using the heavy components, so that the loss of cyclohexanol is reduced.

The invention discloses a rectification mechanism and a carbon disulfide production system containing the same. The rectification mechanism comprises an integrated rectification tower, and an inner cavity of a shell of the integrated rectification tower is sequentially divided into a function-integrated pre-separation and sulfur removal area, a main rectification and hydrogen sulfide removal area and a condensation reflux area from bottom to top in the vertical direction; the pre-separation and sulfur removal area comprises a settling tank arranged at the lower part of the shell, a gathering cover arranged above the inner wall of the settling tank, and a gas rising pipe I arranged above the gathering cover; the invention belongs to the technical field of chemical separation, and achieves the technical effects that multi-stage functions of pre-separation, main rectification, precise purification, final condensation and the like are innovatively integrated in a single tower, so that the fundamental simplification and compactness of the equipment structure are realized; in the traditional process, separate coarse removal, fine removal and finished product towers are replaced by unique expanded settling tanks in the towers, filler layers of integrated plate heat exchangers, tower tops with spiral condensation channels and side-draw systems.

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

The invention discloses a preparation method of phosphorus oxyfluoride based on reaction separation equipment, which comprises the following specific steps: S1, a heat exchange medium enters a driving pipe fitting through a heat exchange medium inlet pipe of the reaction separation equipment, is pressurized at a discharge end of the driving pipe fitting and then is sprayed out in a horizontally outward inclined manner, a heat exchange mechanism and a second filler layer of the reaction separation equipment are driven to integrally rotate, so that a circulating heat source circularly passes through the whole reaction area; s2, respectively feeding liquid industrial phosphoric acid and gaseous anhydrous hydrogen fluoride when the reaction temperature of the reaction zone reaches a set value; s3, liquid industrial phosphoric acid and gaseous anhydrous hydrogen fluoride are in contact on the surface of the rotating second filler layer and react to generate phosphorus oxyfluoride gas; and S4, extracting phosphorus oxyfluoride gas generated by the reaction along the top of the reaction separation tower body. The controllability of the reaction process can be effectively ensured, and the reaction effect is obviously improved.

The utility model provides a compound device for providing feed gas for preparing green ammonia from new energy and a green ammonia synthesis system. The composite device comprises a deep cooling air separation nitrogen generation subsystem, a hydrogen supply subsystem and a main heat exchanger, and the hydrogen supply subsystem comprises a water electrolysis hydrogen generation unit, a first hydrogen compressor, a second hydrogen compressor, a hydrogen storage tank and a hydrogen conveying pipeline. The hydrogen conveying pipeline comprises a first hydrogen conveying pipeline, a second hydrogen conveying pipeline and a third hydrogen conveying pipeline; the main heat exchanger is a multi-channel heat exchanger and comprises a first flowing channel used for flowing of a first medium and a second flowing channel used for flowing of a second medium, the second hydrogen compressor is connected with the hydrogen storage tank through the first flowing channel, and the hydrogen storage tank is connected with the third hydrogen conveying pipeline through the second flowing channel. The composite device provided by the utility model can ensure the supply stability of the raw material hydrogen of the ammonia production subsystem, and solves the technical problem that the hydrogen supply is unstable in the existing green ammonia synthesis process.

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

Embodiments of the present disclosure relate to a method and system for producing refined hydrocarbons from waste plastic pyrolysis oil. The method and system for producing refined hydrocarbons from waste plastic pyrolysis oil according to the embodiments of the present disclosure may minimize formation of an ammonium salt (NH4Cl) and may prevent an adhesion phenomenon of impurity particles in a reactor in a refining process of waste plastic pyrolysis oil containing impurities including chlorine and nitrogen. In addition, the method and system for producing refined hydrocarbons according to the embodiments of the present disclosure may have excellent refining efficiency and may implement a long-term operation of a process because deactivation of a catalyst used in the process is prevented, and may produce refined hydrocarbons having a low content of impurities and a low content of olefins from waste plastic pyrolysis oil.

The invention discloses an efficient purification method of rBHET, and belongs to the technical field of waste polyester recycling. A reaction raw material obtained after premixing of waste PET polyester raw material particles and a catalyst and ethylene glycol are jointly and continuously introduced into a depolymerization reactor, the reaction raw material and ethylene glycol in the depolymerization reactor are mixed and pass through a plurality of rotating discs, and the materials form a flowing film on the rotating discs rotating at a high speed to promote depolymerization; depolymerization reaction liquid generated in the depolymerization reactor enters a temporary storage tank to be stored after being subjected to impurity removal, the depolymerization reaction liquid in the storage tank is introduced into a rectifying tower to be primarily concentrated and purified, obtained concentrated liquid enters an evaporator to be secondarily concentrated and purified, obtained secondary concentrated liquid enters a cooler to be cooled and then enters a product tank to be crystallized; and drying the crystallized solid to obtain a high-purity rBHET product. According to the method, the production efficiency is improved, and the purity of rBHET is effectively improved.

The utility model discloses a heat source optimizing device for a reboiler of a methanol pre-rectifying tower, which comprises the pre-rectifying tower and the reboiler, and is characterized in that a branch pipeline is separated from the crude methanol discharge of a tower kettle and is connected with a negative pressure flash tank, and the crude methanol in the negative pressure flash tank is subjected to gas-liquid separation through flash evaporation; the bottom of the negative-pressure flash tank is connected with a methanol circulating pump, and a liquid-phase material is conveyed to a first heat exchanger at the top of the tower and returns to the negative-pressure flash tank after exchanging heat with steam at the top of the tower; a gas-phase material in the negative-pressure flash tank enters a compressor, is compressed and heated and then returns to the tower kettle of the pre-rectifying tower; according to the utility model, the process is improved by combining flash evaporation of a tower kettle discharge part with heat pump rectification, and meanwhile, the flash evaporation liquid is recycled to recycle steam heat at the top of the tower, so that the steam consumption of a reboiler of the methanol pre-rectifying tower and the use amount of circulating water at the top of the tower are effectively reduced, meanwhile, the reboiler does not need to be added, and the compression ratio of a heat pump compressor can be reduced.

The invention provides an NMP (N-Methyl Pyrrolidone) purification process based on an NMP rectification system, the process is completed by matching a tail gas desorption tower, the space in the tower is divided into an adsorption bin and a desorption bin by arranging a middle box body, two groups of adsorption devices capable of alternately entering the two bins are mounted, and automatic switching of the adsorption devices is realized by utilizing a driving mechanism; when the adsorption efficiency of one group of adsorption devices is reduced, the adsorption devices are automatically transferred to the desorption bin for regeneration treatment, meanwhile, the other group of adsorption devices enter the adsorption bin to continue working, and in the desorption process, low-pressure saturated steam and hot nitrogen are adopted for purging, so that residual moisture is effectively removed, and the adsorption activity is recovered; compared with the prior art, the process has the advantages that gas exchange in the adsorption and desorption process is reduced, the sealing performance and the air pressure balance control capability of the system are improved, the process ensures continuous production, meanwhile, the energy consumption and the discharge pressure are remarkably reduced, and the NMP purification efficiency and the product quality are improved.

The invention provides a device and a method for removing MIBK (methyl isobutyl ketone) in raffinate for extracting and separating zirconium and hafnium, the device comprises a tank body, a liquid distribution ring is fixedly connected in the tank body, one side of the liquid distribution ring penetrates through the tank body and is outwards communicated with a feeding pipe, a plurality of spray heads are arranged below the liquid distribution ring in a penetrating manner, the outer end of the tank body is fixedly connected with a bracket, and the bracket is fixedly connected with a rotating shaft. According to the device, raffinate can be quickly conveyed into the tank body by arranging a liquid distribution ring and a spray head, rotation of a rotating shaft and a rotating plate can be completed in cooperation with a gear assembly, the fallen raffinate is scattered, it is ensured that the raffinate can uniformly fall on a steam heating pipe, and the raffinate is uniformly heated; meanwhile, the contact area of the gas phase and the liquid phase can be increased in cooperation with the condensation assembly, the phase splitting barrel and the grid plate, the MIBK separation efficiency is improved, and the purpose of rapidly removing oil is achieved through the principle that the volatility is affected by factors such as liquid diffusion and temperature.

A method is provided for synthesizing bio-based LPG from renewable sources via a bio-based synthetic gas feedstock, using a solvent absorption process and a solid adsorption process for recovering LPG in high yield while providing for high recovery and reuse, with low pressure drop, of unreacted synthesis gas components.

The invention relates to the field of heavy water production, and discloses an energy-saving rectification heavy water separation process which comprises the following steps: (1) heating feed water, and carrying out primary rectification; (2) compressing steam at the top of the first-stage rectifying tower, then supplying heat to a first reboiler, performing heat exchange condensation on the compressed steam to form tower top produced liquid for first-stage rectification, enabling one part of the tower top produced liquid to flow back to the first-stage rectifying tower, and discharging the other part of the tower top produced liquid as first-stage rectification distillate; (3) a stripping section base solution of the first-stage rectifying tower flows into a first reboiler, and a part of the stripping section base solution is boiled to form rising steam; the rest part enters a tower kettle and is extracted as heavy water or used as feeding water for next-stage rectification; and (4) carrying out N-stage rectification and purification until the heavy water meets the purity requirement. According to the scheme, the boiling difference between water and heavy water is extremely small, tower top condensation heat is equivalent to a heat source required by a tower kettle, tower top steam is used for providing heat for the tower kettle, latent heat of steam is fully utilized, energy consumption is greatly reduced, and a large number of heat sources can be obtained with a small amount of power consumption.

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

The utility model relates to the technical field of chemical separation, and provides a dividing wall column and a rectification device.The dividing wall column comprises a column body, a partition plate, a first distributor and a first liquid collection tray, the partition plate is arranged in the column body and extends in the height direction of the column body, and the top face of the partition plate and the inner top wall of the column body are arranged at intervals in the height direction of the column body; the bottom surface of the partition plate and the inner bottom wall of the tower body are arranged at intervals; in the height direction intersecting with the tower body, one side wall face of the partition plate and a part of the inner wall of the tower body define a feeding section, the other side wall face of the partition plate and the other part of the tower body define a discharging section, the first distributor is arranged in the feeding section and connected with the tower body and the partition plate, and the first liquid collecting disc is arranged in the discharging section and connected with the tower body and the partition plate. According to the invention, the problems of high energy consumption and large occupied area when silicate ester is separated in a double-tower rectification mode can be solved.

The invention provides an NMP waste liquid rectification system and process for a lithium battery, and relates to the technical field of NMP waste liquid treatment. The rectification system comprises a dehydrating tower and a product tower which are connected in series, the dehydrating tower is connected with the raw material tank, a condenser 1 is arranged at the top of the dehydrating tower, a reboiler 1 is arranged at the bottom of the dehydrating tower, and the bottom of the dehydrating tower is connected with the product tower; a condenser 2 is connected to the top of the product tower, a reboiler 2 is arranged at the bottom of the product tower, a concentrator is connected to the bottom of the product tower, and a kettle residue discharge outlet is formed in the bottom of the concentrator; a condenser 3 is arranged at a side line extraction opening of the product tower and is connected with a finished product storage tank; and a plurality of layers of tower plates are arranged in the dehydrating tower and the product tower, and are filled with structured packing. The preparation process comprises the following steps: dehydrating and removing amine, extracting a main product from a side line, and recycling a high-boiling residue. According to the invention, double towers are used together, and the product is extracted from a side line and has high quality; and more heat sources are saved, the production cost is low, and operation is easy and safe.

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

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

The invention relates to the field of heavy water production, and discloses a compression cycle heat supply heavy water rectification process which comprises the following steps: 1, carrying out primary rectification on feed water; 2, condensing tower top steam by a first-stage cooler to obtain tower top produced liquid, enabling one part of the produced liquid to flow back to a first-stage rectifying tower, discharging the other part of the produced liquid, pressurizing and heating a working medium heated by the first-stage cooler by a compressor, and feeding the working medium into a first-stage reboiler; 3, feeding one part of deuterium-enriched water of the tower kettle into a first-stage reboiler, boiling, returning to the bottom of the rectifying tower, taking the rest part as feed water for next-stage rectification, and returning a working medium cooled by the first-stage reboiler into a first-stage cooler through a first-stage expansion valve to be heated and evaporated; and 4, performing N-stage rectification and purification until the heavy water meets the purity requirement. By utilizing the characteristics that the boiling difference between water and heavy water is extremely small and the condensation heat of the tower kettle is equivalent to the heat source required by the tower kettle, the condensation heat of tower top steam is transferred to the tower kettle through the circulating working medium, the energy consumption is greatly reduced, and a large amount of heat sources can be provided for the system by a small amount of power consumption of the compressor.

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

The invention discloses a low-energy-consumption skid-mounted integrated NMP high-efficiency rectification device, and particularly relates to the technical field of chemical engineering, the low-energy-consumption skid-mounted integrated NMP high-efficiency rectification device comprises a mounting skid seat, a secondary dehydration tower, a primary dehydration tower, a primary rectification tower, a secondary rectification tower and a reboiler; the secondary dehydrating tower is detachably connected with the mounting prying seat through a bolt A; the primary dehydrating tower is detachably connected with the mounting prying seat through a bolt B; the primary rectifying tower is detachably connected with the mounting prying seat through a bolt C; the secondary rectifying tower is detachably connected with the mounting prying seat; the reboiler is communicated with the secondary dehydrating tower; the device is reasonable in structural design, and on the basis of the core principle of NMP rectification recovery, by optimizing the rectification process design, efficiently utilizing heat energy, only needing single heating and greatly reducing the heating times of waste liquid, the energy loss is fundamentally reduced, and the energy consumption is obviously saved; meanwhile, the overall height of the device is controlled to be less than ten meters, the requirement for the site space is greatly reduced, and the device can flexibly adapt to the land use situations of more enterprises.

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

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

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

The invention belongs to the technical field of octafluoropropane purification, particularly relates to a device and a method for purifying octafluoropropane, and provides the following scheme aiming at the problems that gas flows to easily generate bubbles and the bubbles wrap impurities in the processes of octafluoropropane rectification and the like: the device comprises a rectifying tower, the bottom of the rectifying tower is fixedly connected with an extraction liquid box, and a round hole is formed in the outer side of the rectifying tower; a purification outlet is fixedly connected to the interior of the round hole, a spraying head is arranged in the rectifying tower, and an input pipe is fixedly connected to the top end of the spraying head. According to the device and method for purifying the octafluoropropane, the bubble breaking piece accurately breaks bubbles, impurities and the octafluoropropane are thoroughly separated, the spoiler strengthens the separation effect, the impurities are evenly enriched, the liftable suction outlet is matched, the impurities are accurately sucked away, impurity residues in a finished product are greatly reduced, and the product quality is improved. And the purity of the perfluoropropane is assisted to stably reach a high standard.

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